TextView.java revision 6e87ecbb1db883aa60aeb37b059f066974220d2b 
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        mBoring = mHintBoring = null;
6087
6088        // Since it depends on the value of mLayout
6089        prepareCursorControllers();
6090    }
6091
6092    /**
6093     * Make a new Layout based on the already-measured size of the view,
6094     * on the assumption that it was measured correctly at some point.
6095     */
6096    private void assumeLayout() {
6097        int width = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6098
6099        if (width < 1) {
6100            width = 0;
6101        }
6102
6103        int physicalWidth = width;
6104
6105        if (mHorizontallyScrolling) {
6106            width = VERY_WIDE;
6107        }
6108
6109        makeNewLayout(width, physicalWidth, UNKNOWN_BORING, UNKNOWN_BORING,
6110                      physicalWidth, false);
6111    }
6112
6113    @Override
6114    protected void resetResolvedLayoutDirection() {
6115        super.resetResolvedLayoutDirection();
6116
6117        if (mLayoutAlignment != null &&
6118                (mTextAlign == TextAlign.VIEW_START ||
6119                mTextAlign == TextAlign.VIEW_END)) {
6120            mLayoutAlignment = null;
6121        }
6122    }
6123
6124    private Layout.Alignment getLayoutAlignment() {
6125        if (mLayoutAlignment == null) {
6126            Layout.Alignment alignment;
6127            TextAlign textAlign = mTextAlign;
6128            switch (textAlign) {
6129                case INHERIT:
6130                    // fall through to gravity temporarily
6131                    // intention is to inherit value through view hierarchy.
6132                case GRAVITY:
6133                    switch (mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) {
6134                        case Gravity.START:
6135                            alignment = Layout.Alignment.ALIGN_NORMAL;
6136                            break;
6137                        case Gravity.END:
6138                            alignment = Layout.Alignment.ALIGN_OPPOSITE;
6139                            break;
6140                        case Gravity.LEFT:
6141                            alignment = Layout.Alignment.ALIGN_LEFT;
6142                            break;
6143                        case Gravity.RIGHT:
6144                            alignment = Layout.Alignment.ALIGN_RIGHT;
6145                            break;
6146                        case Gravity.CENTER_HORIZONTAL:
6147                            alignment = Layout.Alignment.ALIGN_CENTER;
6148                            break;
6149                        default:
6150                            alignment = Layout.Alignment.ALIGN_NORMAL;
6151                            break;
6152                    }
6153                    break;
6154                case TEXT_START:
6155                    alignment = Layout.Alignment.ALIGN_NORMAL;
6156                    break;
6157                case TEXT_END:
6158                    alignment = Layout.Alignment.ALIGN_OPPOSITE;
6159                    break;
6160                case CENTER:
6161                    alignment = Layout.Alignment.ALIGN_CENTER;
6162                    break;
6163                case VIEW_START:
6164                    alignment = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
6165                            Layout.Alignment.ALIGN_RIGHT : Layout.Alignment.ALIGN_LEFT;
6166                    break;
6167                case VIEW_END:
6168                    alignment = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
6169                            Layout.Alignment.ALIGN_LEFT : Layout.Alignment.ALIGN_RIGHT;
6170                    break;
6171                default:
6172                    alignment = Layout.Alignment.ALIGN_NORMAL;
6173                    break;
6174            }
6175            mLayoutAlignment = alignment;
6176        }
6177        return mLayoutAlignment;
6178    }
6179
6180    /**
6181     * The width passed in is now the desired layout width,
6182     * not the full view width with padding.
6183     * {@hide}
6184     */
6185    protected void makeNewLayout(int wantWidth, int hintWidth,
6186                                 BoringLayout.Metrics boring,
6187                                 BoringLayout.Metrics hintBoring,
6188                                 int ellipsisWidth, boolean bringIntoView) {
6189        stopMarquee();
6190
6191        // Update "old" cached values
6192        mOldMaximum = mMaximum;
6193        mOldMaxMode = mMaxMode;
6194
6195        mHighlightPathBogus = true;
6196
6197        if (wantWidth < 0) {
6198            wantWidth = 0;
6199        }
6200        if (hintWidth < 0) {
6201            hintWidth = 0;
6202        }
6203
6204        Layout.Alignment alignment = getLayoutAlignment();
6205        boolean shouldEllipsize = mEllipsize != null && mInput == null;
6206        final boolean switchEllipsize = mEllipsize == TruncateAt.MARQUEE &&
6207                mMarqueeFadeMode != MARQUEE_FADE_NORMAL;
6208        TruncateAt effectiveEllipsize = mEllipsize;
6209        if (mEllipsize == TruncateAt.MARQUEE &&
6210                mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
6211            effectiveEllipsize = TruncateAt.END_SMALL;
6212        }
6213
6214        if (mTextDir == null) {
6215            resolveTextDirection();
6216        }
6217
6218        mLayout = makeSingleLayout(wantWidth, boring, ellipsisWidth, alignment, shouldEllipsize,
6219                effectiveEllipsize, effectiveEllipsize == mEllipsize);
6220        if (switchEllipsize) {
6221            TruncateAt oppositeEllipsize = effectiveEllipsize == TruncateAt.MARQUEE ?
6222                    TruncateAt.END : TruncateAt.MARQUEE;
6223            mSavedMarqueeModeLayout = makeSingleLayout(wantWidth, boring, ellipsisWidth, alignment,
6224                    shouldEllipsize, oppositeEllipsize, effectiveEllipsize != mEllipsize);
6225        }
6226
6227        shouldEllipsize = mEllipsize != null;
6228        mHintLayout = null;
6229
6230        if (mHint != null) {
6231            if (shouldEllipsize) hintWidth = wantWidth;
6232
6233            if (hintBoring == UNKNOWN_BORING) {
6234                hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mTextDir,
6235                                                   mHintBoring);
6236                if (hintBoring != null) {
6237                    mHintBoring = hintBoring;
6238                }
6239            }
6240
6241            if (hintBoring != null) {
6242                if (hintBoring.width <= hintWidth &&
6243                    (!shouldEllipsize || hintBoring.width <= ellipsisWidth)) {
6244                    if (mSavedHintLayout != null) {
6245                        mHintLayout = mSavedHintLayout.
6246                                replaceOrMake(mHint, mTextPaint,
6247                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6248                                hintBoring, mIncludePad);
6249                    } else {
6250                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6251                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6252                                hintBoring, mIncludePad);
6253                    }
6254
6255                    mSavedHintLayout = (BoringLayout) mHintLayout;
6256                } else if (shouldEllipsize && hintBoring.width <= hintWidth) {
6257                    if (mSavedHintLayout != null) {
6258                        mHintLayout = mSavedHintLayout.
6259                                replaceOrMake(mHint, mTextPaint,
6260                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6261                                hintBoring, mIncludePad, mEllipsize,
6262                                ellipsisWidth);
6263                    } else {
6264                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6265                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6266                                hintBoring, mIncludePad, mEllipsize,
6267                                ellipsisWidth);
6268                    }
6269                } else if (shouldEllipsize) {
6270                    mHintLayout = new StaticLayout(mHint,
6271                                0, mHint.length(),
6272                                mTextPaint, hintWidth, alignment, mTextDir, mSpacingMult,
6273                                mSpacingAdd, mIncludePad, mEllipsize,
6274                                ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6275                } else {
6276                    mHintLayout = new StaticLayout(mHint, mTextPaint,
6277                            hintWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6278                            mIncludePad);
6279                }
6280            } else if (shouldEllipsize) {
6281                mHintLayout = new StaticLayout(mHint,
6282                            0, mHint.length(),
6283                            mTextPaint, hintWidth, alignment, mTextDir, mSpacingMult,
6284                            mSpacingAdd, mIncludePad, mEllipsize,
6285                            ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6286            } else {
6287                mHintLayout = new StaticLayout(mHint, mTextPaint,
6288                        hintWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6289                        mIncludePad);
6290            }
6291        }
6292
6293        if (bringIntoView) {
6294            registerForPreDraw();
6295        }
6296
6297        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6298            if (!compressText(ellipsisWidth)) {
6299                final int height = mLayoutParams.height;
6300                // If the size of the view does not depend on the size of the text, try to
6301                // start the marquee immediately
6302                if (height != LayoutParams.WRAP_CONTENT && height != LayoutParams.MATCH_PARENT) {
6303                    startMarquee();
6304                } else {
6305                    // Defer the start of the marquee until we know our width (see setFrame())
6306                    mRestartMarquee = true;
6307                }
6308            }
6309        }
6310
6311        // CursorControllers need a non-null mLayout
6312        prepareCursorControllers();
6313    }
6314
6315    private Layout makeSingleLayout(int wantWidth, BoringLayout.Metrics boring, int ellipsisWidth,
6316            Layout.Alignment alignment, boolean shouldEllipsize, TruncateAt effectiveEllipsize,
6317            boolean useSaved) {
6318        Layout result = null;
6319        if (mText instanceof Spannable) {
6320            result = new DynamicLayout(mText, mTransformed, mTextPaint, wantWidth,
6321                    alignment, mTextDir, mSpacingMult,
6322                    mSpacingAdd, mIncludePad, mInput == null ? effectiveEllipsize : null,
6323                            ellipsisWidth);
6324        } else {
6325            if (boring == UNKNOWN_BORING) {
6326                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
6327                if (boring != null) {
6328                    mBoring = boring;
6329                }
6330            }
6331
6332            if (boring != null) {
6333                if (boring.width <= wantWidth &&
6334                        (effectiveEllipsize == null || boring.width <= ellipsisWidth)) {
6335                    if (useSaved && mSavedLayout != null) {
6336                        result = mSavedLayout.replaceOrMake(mTransformed, mTextPaint,
6337                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6338                                boring, mIncludePad);
6339                    } else {
6340                        result = BoringLayout.make(mTransformed, mTextPaint,
6341                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6342                                boring, mIncludePad);
6343                    }
6344
6345                    if (useSaved) {
6346                        mSavedLayout = (BoringLayout) result;
6347                    }
6348                } else if (shouldEllipsize && boring.width <= wantWidth) {
6349                    if (useSaved && mSavedLayout != null) {
6350                        result = mSavedLayout.replaceOrMake(mTransformed, mTextPaint,
6351                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6352                                boring, mIncludePad, effectiveEllipsize,
6353                                ellipsisWidth);
6354                    } else {
6355                        result = BoringLayout.make(mTransformed, mTextPaint,
6356                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6357                                boring, mIncludePad, effectiveEllipsize,
6358                                ellipsisWidth);
6359                    }
6360                } else if (shouldEllipsize) {
6361                    result = new StaticLayout(mTransformed,
6362                            0, mTransformed.length(),
6363                            mTextPaint, wantWidth, alignment, mTextDir, mSpacingMult,
6364                            mSpacingAdd, mIncludePad, effectiveEllipsize,
6365                            ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6366                } else {
6367                    result = new StaticLayout(mTransformed, mTextPaint,
6368                            wantWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6369                            mIncludePad);
6370                }
6371            } else if (shouldEllipsize) {
6372                result = new StaticLayout(mTransformed,
6373                        0, mTransformed.length(),
6374                        mTextPaint, wantWidth, alignment, mTextDir, mSpacingMult,
6375                        mSpacingAdd, mIncludePad, effectiveEllipsize,
6376                        ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6377            } else {
6378                result = new StaticLayout(mTransformed, mTextPaint,
6379                        wantWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6380                        mIncludePad);
6381            }
6382        }
6383        return result;
6384    }
6385
6386    private boolean compressText(float width) {
6387        if (isHardwareAccelerated()) return false;
6388
6389        // Only compress the text if it hasn't been compressed by the previous pass
6390        if (width > 0.0f && mLayout != null && getLineCount() == 1 && !mUserSetTextScaleX &&
6391                mTextPaint.getTextScaleX() == 1.0f) {
6392            final float textWidth = mLayout.getLineWidth(0);
6393            final float overflow = (textWidth + 1.0f - width) / width;
6394            if (overflow > 0.0f && overflow <= Marquee.MARQUEE_DELTA_MAX) {
6395                mTextPaint.setTextScaleX(1.0f - overflow - 0.005f);
6396                post(new Runnable() {
6397                    public void run() {
6398                        requestLayout();
6399                    }
6400                });
6401                return true;
6402            }
6403        }
6404
6405        return false;
6406    }
6407
6408    private static int desired(Layout layout) {
6409        int n = layout.getLineCount();
6410        CharSequence text = layout.getText();
6411        float max = 0;
6412
6413        // if any line was wrapped, we can't use it.
6414        // but it's ok for the last line not to have a newline
6415
6416        for (int i = 0; i < n - 1; i++) {
6417            if (text.charAt(layout.getLineEnd(i) - 1) != '\n')
6418                return -1;
6419        }
6420
6421        for (int i = 0; i < n; i++) {
6422            max = Math.max(max, layout.getLineWidth(i));
6423        }
6424
6425        return (int) FloatMath.ceil(max);
6426    }
6427
6428    /**
6429     * Set whether the TextView includes extra top and bottom padding to make
6430     * room for accents that go above the normal ascent and descent.
6431     * The default is true.
6432     *
6433     * @attr ref android.R.styleable#TextView_includeFontPadding
6434     */
6435    public void setIncludeFontPadding(boolean includepad) {
6436        if (mIncludePad != includepad) {
6437            mIncludePad = includepad;
6438
6439            if (mLayout != null) {
6440                nullLayouts();
6441                requestLayout();
6442                invalidate();
6443            }
6444        }
6445    }
6446
6447    private static final BoringLayout.Metrics UNKNOWN_BORING = new BoringLayout.Metrics();
6448
6449    @Override
6450    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
6451        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
6452        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
6453        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
6454        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
6455
6456        int width;
6457        int height;
6458
6459        BoringLayout.Metrics boring = UNKNOWN_BORING;
6460        BoringLayout.Metrics hintBoring = UNKNOWN_BORING;
6461
6462        if (mTextDir == null) {
6463            resolveTextDirection();
6464        }
6465
6466        int des = -1;
6467        boolean fromexisting = false;
6468
6469        if (widthMode == MeasureSpec.EXACTLY) {
6470            // Parent has told us how big to be. So be it.
6471            width = widthSize;
6472        } else {
6473            if (mLayout != null && mEllipsize == null) {
6474                des = desired(mLayout);
6475            }
6476
6477            if (des < 0) {
6478                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
6479                if (boring != null) {
6480                    mBoring = boring;
6481                }
6482            } else {
6483                fromexisting = true;
6484            }
6485
6486            if (boring == null || boring == UNKNOWN_BORING) {
6487                if (des < 0) {
6488                    des = (int) FloatMath.ceil(Layout.getDesiredWidth(mTransformed, mTextPaint));
6489                }
6490
6491                width = des;
6492            } else {
6493                width = boring.width;
6494            }
6495
6496            final Drawables dr = mDrawables;
6497            if (dr != null) {
6498                width = Math.max(width, dr.mDrawableWidthTop);
6499                width = Math.max(width, dr.mDrawableWidthBottom);
6500            }
6501
6502            if (mHint != null) {
6503                int hintDes = -1;
6504                int hintWidth;
6505
6506                if (mHintLayout != null && mEllipsize == null) {
6507                    hintDes = desired(mHintLayout);
6508                }
6509
6510                if (hintDes < 0) {
6511                    hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mHintBoring);
6512                    if (hintBoring != null) {
6513                        mHintBoring = hintBoring;
6514                    }
6515                }
6516
6517                if (hintBoring == null || hintBoring == UNKNOWN_BORING) {
6518                    if (hintDes < 0) {
6519                        hintDes = (int) FloatMath.ceil(
6520                                Layout.getDesiredWidth(mHint, mTextPaint));
6521                    }
6522
6523                    hintWidth = hintDes;
6524                } else {
6525                    hintWidth = hintBoring.width;
6526                }
6527
6528                if (hintWidth > width) {
6529                    width = hintWidth;
6530                }
6531            }
6532
6533            width += getCompoundPaddingLeft() + getCompoundPaddingRight();
6534
6535            if (mMaxWidthMode == EMS) {
6536                width = Math.min(width, mMaxWidth * getLineHeight());
6537            } else {
6538                width = Math.min(width, mMaxWidth);
6539            }
6540
6541            if (mMinWidthMode == EMS) {
6542                width = Math.max(width, mMinWidth * getLineHeight());
6543            } else {
6544                width = Math.max(width, mMinWidth);
6545            }
6546
6547            // Check against our minimum width
6548            width = Math.max(width, getSuggestedMinimumWidth());
6549
6550            if (widthMode == MeasureSpec.AT_MOST) {
6551                width = Math.min(widthSize, width);
6552            }
6553        }
6554
6555        int want = width - getCompoundPaddingLeft() - getCompoundPaddingRight();
6556        int unpaddedWidth = want;
6557
6558        if (mHorizontallyScrolling) want = VERY_WIDE;
6559
6560        int hintWant = want;
6561        int hintWidth = (mHintLayout == null) ? hintWant : mHintLayout.getWidth();
6562
6563        if (mLayout == null) {
6564            makeNewLayout(want, hintWant, boring, hintBoring,
6565                          width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6566        } else {
6567            final boolean layoutChanged = (mLayout.getWidth() != want) ||
6568                    (hintWidth != hintWant) ||
6569                    (mLayout.getEllipsizedWidth() !=
6570                            width - getCompoundPaddingLeft() - getCompoundPaddingRight());
6571
6572            final boolean widthChanged = (mHint == null) &&
6573                    (mEllipsize == null) &&
6574                    (want > mLayout.getWidth()) &&
6575                    (mLayout instanceof BoringLayout || (fromexisting && des >= 0 && des <= want));
6576
6577            final boolean maximumChanged = (mMaxMode != mOldMaxMode) || (mMaximum != mOldMaximum);
6578
6579            if (layoutChanged || maximumChanged) {
6580                if (!maximumChanged && widthChanged) {
6581                    mLayout.increaseWidthTo(want);
6582                } else {
6583                    makeNewLayout(want, hintWant, boring, hintBoring,
6584                            width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6585                }
6586            } else {
6587                // Nothing has changed
6588            }
6589        }
6590
6591        if (heightMode == MeasureSpec.EXACTLY) {
6592            // Parent has told us how big to be. So be it.
6593            height = heightSize;
6594            mDesiredHeightAtMeasure = -1;
6595        } else {
6596            int desired = getDesiredHeight();
6597
6598            height = desired;
6599            mDesiredHeightAtMeasure = desired;
6600
6601            if (heightMode == MeasureSpec.AT_MOST) {
6602                height = Math.min(desired, heightSize);
6603            }
6604        }
6605
6606        int unpaddedHeight = height - getCompoundPaddingTop() - getCompoundPaddingBottom();
6607        if (mMaxMode == LINES && mLayout.getLineCount() > mMaximum) {
6608            unpaddedHeight = Math.min(unpaddedHeight, mLayout.getLineTop(mMaximum));
6609        }
6610
6611        /*
6612         * We didn't let makeNewLayout() register to bring the cursor into view,
6613         * so do it here if there is any possibility that it is needed.
6614         */
6615        if (mMovement != null ||
6616            mLayout.getWidth() > unpaddedWidth ||
6617            mLayout.getHeight() > unpaddedHeight) {
6618            registerForPreDraw();
6619        } else {
6620            scrollTo(0, 0);
6621        }
6622
6623        setMeasuredDimension(width, height);
6624    }
6625
6626    private int getDesiredHeight() {
6627        return Math.max(
6628                getDesiredHeight(mLayout, true),
6629                getDesiredHeight(mHintLayout, mEllipsize != null));
6630    }
6631
6632    private int getDesiredHeight(Layout layout, boolean cap) {
6633        if (layout == null) {
6634            return 0;
6635        }
6636
6637        int linecount = layout.getLineCount();
6638        int pad = getCompoundPaddingTop() + getCompoundPaddingBottom();
6639        int desired = layout.getLineTop(linecount);
6640
6641        final Drawables dr = mDrawables;
6642        if (dr != null) {
6643            desired = Math.max(desired, dr.mDrawableHeightLeft);
6644            desired = Math.max(desired, dr.mDrawableHeightRight);
6645        }
6646
6647        desired += pad;
6648
6649        if (mMaxMode == LINES) {
6650            /*
6651             * Don't cap the hint to a certain number of lines.
6652             * (Do cap it, though, if we have a maximum pixel height.)
6653             */
6654            if (cap) {
6655                if (linecount > mMaximum) {
6656                    desired = layout.getLineTop(mMaximum);
6657
6658                    if (dr != null) {
6659                        desired = Math.max(desired, dr.mDrawableHeightLeft);
6660                        desired = Math.max(desired, dr.mDrawableHeightRight);
6661                    }
6662
6663                    desired += pad;
6664                    linecount = mMaximum;
6665                }
6666            }
6667        } else {
6668            desired = Math.min(desired, mMaximum);
6669        }
6670
6671        if (mMinMode == LINES) {
6672            if (linecount < mMinimum) {
6673                desired += getLineHeight() * (mMinimum - linecount);
6674            }
6675        } else {
6676            desired = Math.max(desired, mMinimum);
6677        }
6678
6679        // Check against our minimum height
6680        desired = Math.max(desired, getSuggestedMinimumHeight());
6681
6682        return desired;
6683    }
6684
6685    /**
6686     * Check whether a change to the existing text layout requires a
6687     * new view layout.
6688     */
6689    private void checkForResize() {
6690        boolean sizeChanged = false;
6691
6692        if (mLayout != null) {
6693            // Check if our width changed
6694            if (mLayoutParams.width == LayoutParams.WRAP_CONTENT) {
6695                sizeChanged = true;
6696                invalidate();
6697            }
6698
6699            // Check if our height changed
6700            if (mLayoutParams.height == LayoutParams.WRAP_CONTENT) {
6701                int desiredHeight = getDesiredHeight();
6702
6703                if (desiredHeight != this.getHeight()) {
6704                    sizeChanged = true;
6705                }
6706            } else if (mLayoutParams.height == LayoutParams.MATCH_PARENT) {
6707                if (mDesiredHeightAtMeasure >= 0) {
6708                    int desiredHeight = getDesiredHeight();
6709
6710                    if (desiredHeight != mDesiredHeightAtMeasure) {
6711                        sizeChanged = true;
6712                    }
6713                }
6714            }
6715        }
6716
6717        if (sizeChanged) {
6718            requestLayout();
6719            // caller will have already invalidated
6720        }
6721    }
6722
6723    /**
6724     * Check whether entirely new text requires a new view layout
6725     * or merely a new text layout.
6726     */
6727    private void checkForRelayout() {
6728        // If we have a fixed width, we can just swap in a new text layout
6729        // if the text height stays the same or if the view height is fixed.
6730
6731        if ((mLayoutParams.width != LayoutParams.WRAP_CONTENT ||
6732                (mMaxWidthMode == mMinWidthMode && mMaxWidth == mMinWidth)) &&
6733                (mHint == null || mHintLayout != null) &&
6734                (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight() > 0)) {
6735            // Static width, so try making a new text layout.
6736
6737            int oldht = mLayout.getHeight();
6738            int want = mLayout.getWidth();
6739            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
6740
6741            /*
6742             * No need to bring the text into view, since the size is not
6743             * changing (unless we do the requestLayout(), in which case it
6744             * will happen at measure).
6745             */
6746            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
6747                          mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight(),
6748                          false);
6749
6750            if (mEllipsize != TextUtils.TruncateAt.MARQUEE) {
6751                // In a fixed-height view, so use our new text layout.
6752                if (mLayoutParams.height != LayoutParams.WRAP_CONTENT &&
6753                    mLayoutParams.height != LayoutParams.MATCH_PARENT) {
6754                    invalidate();
6755                    return;
6756                }
6757
6758                // Dynamic height, but height has stayed the same,
6759                // so use our new text layout.
6760                if (mLayout.getHeight() == oldht &&
6761                    (mHintLayout == null || mHintLayout.getHeight() == oldht)) {
6762                    invalidate();
6763                    return;
6764                }
6765            }
6766
6767            // We lose: the height has changed and we have a dynamic height.
6768            // Request a new view layout using our new text layout.
6769            requestLayout();
6770            invalidate();
6771        } else {
6772            // Dynamic width, so we have no choice but to request a new
6773            // view layout with a new text layout.
6774            nullLayouts();
6775            requestLayout();
6776            invalidate();
6777        }
6778    }
6779
6780    /**
6781     * Returns true if anything changed.
6782     */
6783    private boolean bringTextIntoView() {
6784        int line = 0;
6785        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6786            line = mLayout.getLineCount() - 1;
6787        }
6788
6789        Layout.Alignment a = mLayout.getParagraphAlignment(line);
6790        int dir = mLayout.getParagraphDirection(line);
6791        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6792        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6793        int ht = mLayout.getHeight();
6794
6795        int scrollx, scrolly;
6796
6797        // Convert to left, center, or right alignment.
6798        if (a == Layout.Alignment.ALIGN_NORMAL) {
6799            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_LEFT :
6800                Layout.Alignment.ALIGN_RIGHT;
6801        } else if (a == Layout.Alignment.ALIGN_OPPOSITE){
6802            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_RIGHT :
6803                Layout.Alignment.ALIGN_LEFT;
6804        }
6805
6806        if (a == Layout.Alignment.ALIGN_CENTER) {
6807            /*
6808             * Keep centered if possible, or, if it is too wide to fit,
6809             * keep leading edge in view.
6810             */
6811
6812            int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6813            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6814
6815            if (right - left < hspace) {
6816                scrollx = (right + left) / 2 - hspace / 2;
6817            } else {
6818                if (dir < 0) {
6819                    scrollx = right - hspace;
6820                } else {
6821                    scrollx = left;
6822                }
6823            }
6824        } else if (a == Layout.Alignment.ALIGN_RIGHT) {
6825            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6826            scrollx = right - hspace;
6827        } else { // a == Layout.Alignment.ALIGN_LEFT (will also be the default)
6828            scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
6829        }
6830
6831        if (ht < vspace) {
6832            scrolly = 0;
6833        } else {
6834            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6835                scrolly = ht - vspace;
6836            } else {
6837                scrolly = 0;
6838            }
6839        }
6840
6841        if (scrollx != mScrollX || scrolly != mScrollY) {
6842            scrollTo(scrollx, scrolly);
6843            return true;
6844        } else {
6845            return false;
6846        }
6847    }
6848
6849    /**
6850     * Move the point, specified by the offset, into the view if it is needed.
6851     * This has to be called after layout. Returns true if anything changed.
6852     */
6853    public boolean bringPointIntoView(int offset) {
6854        boolean changed = false;
6855
6856        if (mLayout == null) return changed;
6857
6858        int line = mLayout.getLineForOffset(offset);
6859
6860        // FIXME: Is it okay to truncate this, or should we round?
6861        final int x = (int)mLayout.getPrimaryHorizontal(offset);
6862        final int top = mLayout.getLineTop(line);
6863        final int bottom = mLayout.getLineTop(line + 1);
6864
6865        int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6866        int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6867        int ht = mLayout.getHeight();
6868
6869        int grav;
6870
6871        switch (mLayout.getParagraphAlignment(line)) {
6872            case ALIGN_LEFT:
6873                grav = 1;
6874                break;
6875            case ALIGN_RIGHT:
6876                grav = -1;
6877                break;
6878            case ALIGN_NORMAL:
6879                grav = mLayout.getParagraphDirection(line);
6880                break;
6881            case ALIGN_OPPOSITE:
6882                grav = -mLayout.getParagraphDirection(line);
6883                break;
6884            case ALIGN_CENTER:
6885            default:
6886                grav = 0;
6887                break;
6888        }
6889
6890        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6891        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6892
6893        int hslack = (bottom - top) / 2;
6894        int vslack = hslack;
6895
6896        if (vslack > vspace / 4)
6897            vslack = vspace / 4;
6898        if (hslack > hspace / 4)
6899            hslack = hspace / 4;
6900
6901        int hs = mScrollX;
6902        int vs = mScrollY;
6903
6904        if (top - vs < vslack)
6905            vs = top - vslack;
6906        if (bottom - vs > vspace - vslack)
6907            vs = bottom - (vspace - vslack);
6908        if (ht - vs < vspace)
6909            vs = ht - vspace;
6910        if (0 - vs > 0)
6911            vs = 0;
6912
6913        if (grav != 0) {
6914            if (x - hs < hslack) {
6915                hs = x - hslack;
6916            }
6917            if (x - hs > hspace - hslack) {
6918                hs = x - (hspace - hslack);
6919            }
6920        }
6921
6922        if (grav < 0) {
6923            if (left - hs > 0)
6924                hs = left;
6925            if (right - hs < hspace)
6926                hs = right - hspace;
6927        } else if (grav > 0) {
6928            if (right - hs < hspace)
6929                hs = right - hspace;
6930            if (left - hs > 0)
6931                hs = left;
6932        } else /* grav == 0 */ {
6933            if (right - left <= hspace) {
6934                /*
6935                 * If the entire text fits, center it exactly.
6936                 */
6937                hs = left - (hspace - (right - left)) / 2;
6938            } else if (x > right - hslack) {
6939                /*
6940                 * If we are near the right edge, keep the right edge
6941                 * at the edge of the view.
6942                 */
6943                hs = right - hspace;
6944            } else if (x < left + hslack) {
6945                /*
6946                 * If we are near the left edge, keep the left edge
6947                 * at the edge of the view.
6948                 */
6949                hs = left;
6950            } else if (left > hs) {
6951                /*
6952                 * Is there whitespace visible at the left?  Fix it if so.
6953                 */
6954                hs = left;
6955            } else if (right < hs + hspace) {
6956                /*
6957                 * Is there whitespace visible at the right?  Fix it if so.
6958                 */
6959                hs = right - hspace;
6960            } else {
6961                /*
6962                 * Otherwise, float as needed.
6963                 */
6964                if (x - hs < hslack) {
6965                    hs = x - hslack;
6966                }
6967                if (x - hs > hspace - hslack) {
6968                    hs = x - (hspace - hslack);
6969                }
6970            }
6971        }
6972
6973        if (hs != mScrollX || vs != mScrollY) {
6974            if (mScroller == null) {
6975                scrollTo(hs, vs);
6976            } else {
6977                long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll;
6978                int dx = hs - mScrollX;
6979                int dy = vs - mScrollY;
6980
6981                if (duration > ANIMATED_SCROLL_GAP) {
6982                    mScroller.startScroll(mScrollX, mScrollY, dx, dy);
6983                    awakenScrollBars(mScroller.getDuration());
6984                    invalidate();
6985                } else {
6986                    if (!mScroller.isFinished()) {
6987                        mScroller.abortAnimation();
6988                    }
6989
6990                    scrollBy(dx, dy);
6991                }
6992
6993                mLastScroll = AnimationUtils.currentAnimationTimeMillis();
6994            }
6995
6996            changed = true;
6997        }
6998
6999        if (isFocused()) {
7000            // This offsets because getInterestingRect() is in terms of viewport coordinates, but
7001            // requestRectangleOnScreen() is in terms of content coordinates.
7002
7003            if (mTempRect == null) mTempRect = new Rect();
7004            // The offsets here are to ensure the rectangle we are using is
7005            // within our view bounds, in case the cursor is on the far left
7006            // or right.  If it isn't withing the bounds, then this request
7007            // will be ignored.
7008            mTempRect.set(x - 2, top, x + 2, bottom);
7009            getInterestingRect(mTempRect, line);
7010            mTempRect.offset(mScrollX, mScrollY);
7011
7012            if (requestRectangleOnScreen(mTempRect)) {
7013                changed = true;
7014            }
7015        }
7016
7017        return changed;
7018    }
7019
7020    /**
7021     * Move the cursor, if needed, so that it is at an offset that is visible
7022     * to the user.  This will not move the cursor if it represents more than
7023     * one character (a selection range).  This will only work if the
7024     * TextView contains spannable text; otherwise it will do nothing.
7025     *
7026     * @return True if the cursor was actually moved, false otherwise.
7027     */
7028    public boolean moveCursorToVisibleOffset() {
7029        if (!(mText instanceof Spannable)) {
7030            return false;
7031        }
7032        int start = getSelectionStart();
7033        int end = getSelectionEnd();
7034        if (start != end) {
7035            return false;
7036        }
7037
7038        // First: make sure the line is visible on screen:
7039
7040        int line = mLayout.getLineForOffset(start);
7041
7042        final int top = mLayout.getLineTop(line);
7043        final int bottom = mLayout.getLineTop(line + 1);
7044        final int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
7045        int vslack = (bottom - top) / 2;
7046        if (vslack > vspace / 4)
7047            vslack = vspace / 4;
7048        final int vs = mScrollY;
7049
7050        if (top < (vs+vslack)) {
7051            line = mLayout.getLineForVertical(vs+vslack+(bottom-top));
7052        } else if (bottom > (vspace+vs-vslack)) {
7053            line = mLayout.getLineForVertical(vspace+vs-vslack-(bottom-top));
7054        }
7055
7056        // Next: make sure the character is visible on screen:
7057
7058        final int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
7059        final int hs = mScrollX;
7060        final int leftChar = mLayout.getOffsetForHorizontal(line, hs);
7061        final int rightChar = mLayout.getOffsetForHorizontal(line, hspace+hs);
7062
7063        // line might contain bidirectional text
7064        final int lowChar = leftChar < rightChar ? leftChar : rightChar;
7065        final int highChar = leftChar > rightChar ? leftChar : rightChar;
7066
7067        int newStart = start;
7068        if (newStart < lowChar) {
7069            newStart = lowChar;
7070        } else if (newStart > highChar) {
7071            newStart = highChar;
7072        }
7073
7074        if (newStart != start) {
7075            Selection.setSelection((Spannable)mText, newStart);
7076            return true;
7077        }
7078
7079        return false;
7080    }
7081
7082    @Override
7083    public void computeScroll() {
7084        if (mScroller != null) {
7085            if (mScroller.computeScrollOffset()) {
7086                mScrollX = mScroller.getCurrX();
7087                mScrollY = mScroller.getCurrY();
7088                invalidateParentCaches();
7089                postInvalidate();  // So we draw again
7090            }
7091        }
7092    }
7093
7094    private void getInterestingRect(Rect r, int line) {
7095        convertFromViewportToContentCoordinates(r);
7096
7097        // Rectangle can can be expanded on first and last line to take
7098        // padding into account.
7099        // TODO Take left/right padding into account too?
7100        if (line == 0) r.top -= getExtendedPaddingTop();
7101        if (line == mLayout.getLineCount() - 1) r.bottom += getExtendedPaddingBottom();
7102    }
7103
7104    private void convertFromViewportToContentCoordinates(Rect r) {
7105        final int horizontalOffset = viewportToContentHorizontalOffset();
7106        r.left += horizontalOffset;
7107        r.right += horizontalOffset;
7108
7109        final int verticalOffset = viewportToContentVerticalOffset();
7110        r.top += verticalOffset;
7111        r.bottom += verticalOffset;
7112    }
7113
7114    private int viewportToContentHorizontalOffset() {
7115        return getCompoundPaddingLeft() - mScrollX;
7116    }
7117
7118    private int viewportToContentVerticalOffset() {
7119        int offset = getExtendedPaddingTop() - mScrollY;
7120        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
7121            offset += getVerticalOffset(false);
7122        }
7123        return offset;
7124    }
7125
7126    @Override
7127    public void debug(int depth) {
7128        super.debug(depth);
7129
7130        String output = debugIndent(depth);
7131        output += "frame={" + mLeft + ", " + mTop + ", " + mRight
7132                + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY
7133                + "} ";
7134
7135        if (mText != null) {
7136
7137            output += "mText=\"" + mText + "\" ";
7138            if (mLayout != null) {
7139                output += "mLayout width=" + mLayout.getWidth()
7140                        + " height=" + mLayout.getHeight();
7141            }
7142        } else {
7143            output += "mText=NULL";
7144        }
7145        Log.d(VIEW_LOG_TAG, output);
7146    }
7147
7148    /**
7149     * Convenience for {@link Selection#getSelectionStart}.
7150     */
7151    @ViewDebug.ExportedProperty(category = "text")
7152    public int getSelectionStart() {
7153        return Selection.getSelectionStart(getText());
7154    }
7155
7156    /**
7157     * Convenience for {@link Selection#getSelectionEnd}.
7158     */
7159    @ViewDebug.ExportedProperty(category = "text")
7160    public int getSelectionEnd() {
7161        return Selection.getSelectionEnd(getText());
7162    }
7163
7164    /**
7165     * Return true iff there is a selection inside this text view.
7166     */
7167    public boolean hasSelection() {
7168        final int selectionStart = getSelectionStart();
7169        final int selectionEnd = getSelectionEnd();
7170
7171        return selectionStart >= 0 && selectionStart != selectionEnd;
7172    }
7173
7174    /**
7175     * Sets the properties of this field (lines, horizontally scrolling,
7176     * transformation method) to be for a single-line input.
7177     *
7178     * @attr ref android.R.styleable#TextView_singleLine
7179     */
7180    public void setSingleLine() {
7181        setSingleLine(true);
7182    }
7183
7184    /**
7185     * Sets the properties of this field to transform input to ALL CAPS
7186     * display. This may use a "small caps" formatting if available.
7187     * This setting will be ignored if this field is editable or selectable.
7188     *
7189     * This call replaces the current transformation method. Disabling this
7190     * will not necessarily restore the previous behavior from before this
7191     * was enabled.
7192     *
7193     * @see #setTransformationMethod(TransformationMethod)
7194     * @attr ref android.R.styleable#TextView_textAllCaps
7195     */
7196    public void setAllCaps(boolean allCaps) {
7197        if (allCaps) {
7198            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
7199        } else {
7200            setTransformationMethod(null);
7201        }
7202    }
7203
7204    /**
7205     * If true, sets the properties of this field (number of lines, horizontally scrolling,
7206     * transformation method) to be for a single-line input; if false, restores these to the default
7207     * conditions.
7208     *
7209     * Note that the default conditions are not necessarily those that were in effect prior this
7210     * method, and you may want to reset these properties to your custom values.
7211     *
7212     * @attr ref android.R.styleable#TextView_singleLine
7213     */
7214    @android.view.RemotableViewMethod
7215    public void setSingleLine(boolean singleLine) {
7216        // Could be used, but may break backward compatibility.
7217        // if (mSingleLine == singleLine) return;
7218        setInputTypeSingleLine(singleLine);
7219        applySingleLine(singleLine, true, true);
7220    }
7221
7222    /**
7223     * Adds or remove the EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE on the mInputType.
7224     * @param singleLine
7225     */
7226    private void setInputTypeSingleLine(boolean singleLine) {
7227        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
7228            if (singleLine) {
7229                mInputType &= ~EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
7230            } else {
7231                mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
7232            }
7233        }
7234    }
7235
7236    private void applySingleLine(boolean singleLine, boolean applyTransformation,
7237            boolean changeMaxLines) {
7238        mSingleLine = singleLine;
7239        if (singleLine) {
7240            setLines(1);
7241            setHorizontallyScrolling(true);
7242            if (applyTransformation) {
7243                setTransformationMethod(SingleLineTransformationMethod.getInstance());
7244            }
7245        } else {
7246            if (changeMaxLines) {
7247                setMaxLines(Integer.MAX_VALUE);
7248            }
7249            setHorizontallyScrolling(false);
7250            if (applyTransformation) {
7251                setTransformationMethod(null);
7252            }
7253        }
7254    }
7255
7256    /**
7257     * Causes words in the text that are longer than the view is wide
7258     * to be ellipsized instead of broken in the middle.  You may also
7259     * want to {@link #setSingleLine} or {@link #setHorizontallyScrolling}
7260     * to constrain the text to a single line.  Use <code>null</code>
7261     * to turn off ellipsizing.
7262     *
7263     * If {@link #setMaxLines} has been used to set two or more lines,
7264     * {@link android.text.TextUtils.TruncateAt#END} and
7265     * {@link android.text.TextUtils.TruncateAt#MARQUEE}* are only supported
7266     * (other ellipsizing types will not do anything).
7267     *
7268     * @attr ref android.R.styleable#TextView_ellipsize
7269     */
7270    public void setEllipsize(TextUtils.TruncateAt where) {
7271        // TruncateAt is an enum. != comparison is ok between these singleton objects.
7272        if (mEllipsize != where) {
7273            mEllipsize = where;
7274
7275            if (mLayout != null) {
7276                nullLayouts();
7277                requestLayout();
7278                invalidate();
7279            }
7280        }
7281    }
7282
7283    /**
7284     * Sets how many times to repeat the marquee animation. Only applied if the
7285     * TextView has marquee enabled. Set to -1 to repeat indefinitely.
7286     *
7287     * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
7288     */
7289    public void setMarqueeRepeatLimit(int marqueeLimit) {
7290        mMarqueeRepeatLimit = marqueeLimit;
7291    }
7292
7293    /**
7294     * Returns where, if anywhere, words that are longer than the view
7295     * is wide should be ellipsized.
7296     */
7297    @ViewDebug.ExportedProperty
7298    public TextUtils.TruncateAt getEllipsize() {
7299        return mEllipsize;
7300    }
7301
7302    /**
7303     * Set the TextView so that when it takes focus, all the text is
7304     * selected.
7305     *
7306     * @attr ref android.R.styleable#TextView_selectAllOnFocus
7307     */
7308    @android.view.RemotableViewMethod
7309    public void setSelectAllOnFocus(boolean selectAllOnFocus) {
7310        mSelectAllOnFocus = selectAllOnFocus;
7311
7312        if (selectAllOnFocus && !(mText instanceof Spannable)) {
7313            setText(mText, BufferType.SPANNABLE);
7314        }
7315    }
7316
7317    /**
7318     * Set whether the cursor is visible.  The default is true.
7319     *
7320     * @attr ref android.R.styleable#TextView_cursorVisible
7321     */
7322    @android.view.RemotableViewMethod
7323    public void setCursorVisible(boolean visible) {
7324        if (mCursorVisible != visible) {
7325            mCursorVisible = visible;
7326            invalidate();
7327
7328            makeBlink();
7329
7330            // InsertionPointCursorController depends on mCursorVisible
7331            prepareCursorControllers();
7332        }
7333    }
7334
7335    private boolean isCursorVisible() {
7336        return mCursorVisible && isTextEditable();
7337    }
7338
7339    private boolean canMarquee() {
7340        int width = (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight());
7341        return width > 0 && (mLayout.getLineWidth(0) > width ||
7342                (mMarqueeFadeMode != MARQUEE_FADE_NORMAL && mSavedMarqueeModeLayout != null &&
7343                        mSavedMarqueeModeLayout.getLineWidth(0) > width));
7344    }
7345
7346    private void startMarquee() {
7347        // Do not ellipsize EditText
7348        if (mInput != null) return;
7349
7350        if (compressText(getWidth() - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
7351            return;
7352        }
7353
7354        if ((mMarquee == null || mMarquee.isStopped()) && (isFocused() || isSelected()) &&
7355                getLineCount() == 1 && canMarquee()) {
7356
7357            if (mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
7358                mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_FADE;
7359                final Layout tmp = mLayout;
7360                mLayout = mSavedMarqueeModeLayout;
7361                mSavedMarqueeModeLayout = tmp;
7362                setHorizontalFadingEdgeEnabled(true);
7363                requestLayout();
7364                invalidate();
7365            }
7366
7367            if (mMarquee == null) mMarquee = new Marquee(this);
7368            mMarquee.start(mMarqueeRepeatLimit);
7369        }
7370    }
7371
7372    private void stopMarquee() {
7373        if (mMarquee != null && !mMarquee.isStopped()) {
7374            mMarquee.stop();
7375        }
7376
7377        if (mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_FADE) {
7378            mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
7379            final Layout tmp = mSavedMarqueeModeLayout;
7380            mSavedMarqueeModeLayout = mLayout;
7381            mLayout = tmp;
7382            setHorizontalFadingEdgeEnabled(false);
7383            requestLayout();
7384            invalidate();
7385        }
7386    }
7387
7388    private void startStopMarquee(boolean start) {
7389        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7390            if (start) {
7391                startMarquee();
7392            } else {
7393                stopMarquee();
7394            }
7395        }
7396    }
7397
7398    private static final class Marquee extends Handler {
7399        // TODO: Add an option to configure this
7400        private static final float MARQUEE_DELTA_MAX = 0.07f;
7401        private static final int MARQUEE_DELAY = 1200;
7402        private static final int MARQUEE_RESTART_DELAY = 1200;
7403        private static final int MARQUEE_RESOLUTION = 1000 / 30;
7404        private static final int MARQUEE_PIXELS_PER_SECOND = 30;
7405
7406        private static final byte MARQUEE_STOPPED = 0x0;
7407        private static final byte MARQUEE_STARTING = 0x1;
7408        private static final byte MARQUEE_RUNNING = 0x2;
7409
7410        private static final int MESSAGE_START = 0x1;
7411        private static final int MESSAGE_TICK = 0x2;
7412        private static final int MESSAGE_RESTART = 0x3;
7413
7414        private final WeakReference<TextView> mView;
7415
7416        private byte mStatus = MARQUEE_STOPPED;
7417        private final float mScrollUnit;
7418        private float mMaxScroll;
7419        float mMaxFadeScroll;
7420        private float mGhostStart;
7421        private float mGhostOffset;
7422        private float mFadeStop;
7423        private int mRepeatLimit;
7424
7425        float mScroll;
7426
7427        Marquee(TextView v) {
7428            final float density = v.getContext().getResources().getDisplayMetrics().density;
7429            mScrollUnit = (MARQUEE_PIXELS_PER_SECOND * density) / MARQUEE_RESOLUTION;
7430            mView = new WeakReference<TextView>(v);
7431        }
7432
7433        @Override
7434        public void handleMessage(Message msg) {
7435            switch (msg.what) {
7436                case MESSAGE_START:
7437                    mStatus = MARQUEE_RUNNING;
7438                    tick();
7439                    break;
7440                case MESSAGE_TICK:
7441                    tick();
7442                    break;
7443                case MESSAGE_RESTART:
7444                    if (mStatus == MARQUEE_RUNNING) {
7445                        if (mRepeatLimit >= 0) {
7446                            mRepeatLimit--;
7447                        }
7448                        start(mRepeatLimit);
7449                    }
7450                    break;
7451            }
7452        }
7453
7454        void tick() {
7455            if (mStatus != MARQUEE_RUNNING) {
7456                return;
7457            }
7458
7459            removeMessages(MESSAGE_TICK);
7460
7461            final TextView textView = mView.get();
7462            if (textView != null && (textView.isFocused() || textView.isSelected())) {
7463                mScroll += mScrollUnit;
7464                if (mScroll > mMaxScroll) {
7465                    mScroll = mMaxScroll;
7466                    sendEmptyMessageDelayed(MESSAGE_RESTART, MARQUEE_RESTART_DELAY);
7467                } else {
7468                    sendEmptyMessageDelayed(MESSAGE_TICK, MARQUEE_RESOLUTION);
7469                }
7470                textView.invalidate();
7471            }
7472        }
7473
7474        void stop() {
7475            mStatus = MARQUEE_STOPPED;
7476            removeMessages(MESSAGE_START);
7477            removeMessages(MESSAGE_RESTART);
7478            removeMessages(MESSAGE_TICK);
7479            resetScroll();
7480        }
7481
7482        private void resetScroll() {
7483            mScroll = 0.0f;
7484            final TextView textView = mView.get();
7485            if (textView != null) textView.invalidate();
7486        }
7487
7488        void start(int repeatLimit) {
7489            if (repeatLimit == 0) {
7490                stop();
7491                return;
7492            }
7493            mRepeatLimit = repeatLimit;
7494            final TextView textView = mView.get();
7495            if (textView != null && textView.mLayout != null) {
7496                mStatus = MARQUEE_STARTING;
7497                mScroll = 0.0f;
7498                final int textWidth = textView.getWidth() - textView.getCompoundPaddingLeft() -
7499                        textView.getCompoundPaddingRight();
7500                final float lineWidth = textView.mLayout.getLineWidth(0);
7501                final float gap = textWidth / 3.0f;
7502                mGhostStart = lineWidth - textWidth + gap;
7503                mMaxScroll = mGhostStart + textWidth;
7504                mGhostOffset = lineWidth + gap;
7505                mFadeStop = lineWidth + textWidth / 6.0f;
7506                mMaxFadeScroll = mGhostStart + lineWidth + lineWidth;
7507
7508                textView.invalidate();
7509                sendEmptyMessageDelayed(MESSAGE_START, MARQUEE_DELAY);
7510            }
7511        }
7512
7513        float getGhostOffset() {
7514            return mGhostOffset;
7515        }
7516
7517        boolean shouldDrawLeftFade() {
7518            return mScroll <= mFadeStop;
7519        }
7520
7521        boolean shouldDrawGhost() {
7522            return mStatus == MARQUEE_RUNNING && mScroll > mGhostStart;
7523        }
7524
7525        boolean isRunning() {
7526            return mStatus == MARQUEE_RUNNING;
7527        }
7528
7529        boolean isStopped() {
7530            return mStatus == MARQUEE_STOPPED;
7531        }
7532    }
7533
7534    /**
7535     * This method is called when the text is changed, in case any subclasses
7536     * would like to know.
7537     *
7538     * Within <code>text</code>, the <code>lengthAfter</code> characters
7539     * beginning at <code>start</code> have just replaced old text that had
7540     * length <code>lengthBefore</code>. It is an error to attempt to make
7541     * changes to <code>text</code> from this callback.
7542     *
7543     * @param text The text the TextView is displaying
7544     * @param start The offset of the start of the range of the text that was
7545     * modified
7546     * @param lengthBefore The length of the former text that has been replaced
7547     * @param lengthAfter The length of the replacement modified text
7548     */
7549    protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
7550        // intentionally empty, template pattern method can be overridden by subclasses
7551    }
7552
7553    /**
7554     * This method is called when the selection has changed, in case any
7555     * subclasses would like to know.
7556     *
7557     * @param selStart The new selection start location.
7558     * @param selEnd The new selection end location.
7559     */
7560    protected void onSelectionChanged(int selStart, int selEnd) {
7561        sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED);
7562    }
7563
7564    /**
7565     * Adds a TextWatcher to the list of those whose methods are called
7566     * whenever this TextView's text changes.
7567     * <p>
7568     * In 1.0, the {@link TextWatcher#afterTextChanged} method was erroneously
7569     * not called after {@link #setText} calls.  Now, doing {@link #setText}
7570     * if there are any text changed listeners forces the buffer type to
7571     * Editable if it would not otherwise be and does call this method.
7572     */
7573    public void addTextChangedListener(TextWatcher watcher) {
7574        if (mListeners == null) {
7575            mListeners = new ArrayList<TextWatcher>();
7576        }
7577
7578        mListeners.add(watcher);
7579    }
7580
7581    /**
7582     * Removes the specified TextWatcher from the list of those whose
7583     * methods are called
7584     * whenever this TextView's text changes.
7585     */
7586    public void removeTextChangedListener(TextWatcher watcher) {
7587        if (mListeners != null) {
7588            int i = mListeners.indexOf(watcher);
7589
7590            if (i >= 0) {
7591                mListeners.remove(i);
7592            }
7593        }
7594    }
7595
7596    private void sendBeforeTextChanged(CharSequence text, int start, int before, int after) {
7597        if (mListeners != null) {
7598            final ArrayList<TextWatcher> list = mListeners;
7599            final int count = list.size();
7600            for (int i = 0; i < count; i++) {
7601                list.get(i).beforeTextChanged(text, start, before, after);
7602            }
7603        }
7604
7605        // The spans that are inside or intersect the modified region no longer make sense
7606        removeIntersectingSpans(start, start + before, SpellCheckSpan.class);
7607        removeIntersectingSpans(start, start + before, SuggestionSpan.class);
7608    }
7609
7610    // Removes all spans that are inside or actually overlap the start..end range
7611    private <T> void removeIntersectingSpans(int start, int end, Class<T> type) {
7612        if (!(mText instanceof Editable)) return;
7613        Editable text = (Editable) mText;
7614
7615        T[] spans = text.getSpans(start, end, type);
7616        final int length = spans.length;
7617        for (int i = 0; i < length; i++) {
7618            final int s = text.getSpanStart(spans[i]);
7619            final int e = text.getSpanEnd(spans[i]);
7620            // Spans that are adjacent to the edited region will be handled in
7621            // updateSpellCheckSpans. Result depends on what will be added (space or text)
7622            if (e == start || s == end) break;
7623            text.removeSpan(spans[i]);
7624        }
7625    }
7626
7627    /**
7628     * Not private so it can be called from an inner class without going
7629     * through a thunk.
7630     */
7631    void sendOnTextChanged(CharSequence text, int start, int before, int after) {
7632        if (mListeners != null) {
7633            final ArrayList<TextWatcher> list = mListeners;
7634            final int count = list.size();
7635            for (int i = 0; i < count; i++) {
7636                list.get(i).onTextChanged(text, start, before, after);
7637            }
7638        }
7639
7640        updateSpellCheckSpans(start, start + after, false);
7641
7642        // Hide the controllers as soon as text is modified (typing, procedural...)
7643        // We do not hide the span controllers, since they can be added when a new text is
7644        // inserted into the text view (voice IME).
7645        hideCursorControllers();
7646    }
7647
7648    /**
7649     * Not private so it can be called from an inner class without going
7650     * through a thunk.
7651     */
7652    void sendAfterTextChanged(Editable text) {
7653        if (mListeners != null) {
7654            final ArrayList<TextWatcher> list = mListeners;
7655            final int count = list.size();
7656            for (int i = 0; i < count; i++) {
7657                list.get(i).afterTextChanged(text);
7658            }
7659        }
7660    }
7661
7662    /**
7663     * Not private so it can be called from an inner class without going
7664     * through a thunk.
7665     */
7666    void handleTextChanged(CharSequence buffer, int start, int before, int after) {
7667        final InputMethodState ims = mInputMethodState;
7668        if (ims == null || ims.mBatchEditNesting == 0) {
7669            updateAfterEdit();
7670        }
7671        if (ims != null) {
7672            ims.mContentChanged = true;
7673            if (ims.mChangedStart < 0) {
7674                ims.mChangedStart = start;
7675                ims.mChangedEnd = start+before;
7676            } else {
7677                ims.mChangedStart = Math.min(ims.mChangedStart, start);
7678                ims.mChangedEnd = Math.max(ims.mChangedEnd, start + before - ims.mChangedDelta);
7679            }
7680            ims.mChangedDelta += after-before;
7681        }
7682
7683        sendOnTextChanged(buffer, start, before, after);
7684        onTextChanged(buffer, start, before, after);
7685    }
7686
7687    /**
7688     * Not private so it can be called from an inner class without going
7689     * through a thunk.
7690     */
7691    void spanChange(Spanned buf, Object what, int oldStart, int newStart, int oldEnd, int newEnd) {
7692        // XXX Make the start and end move together if this ends up
7693        // spending too much time invalidating.
7694
7695        boolean selChanged = false;
7696        int newSelStart=-1, newSelEnd=-1;
7697
7698        final InputMethodState ims = mInputMethodState;
7699
7700        if (what == Selection.SELECTION_END) {
7701            mHighlightPathBogus = true;
7702            selChanged = true;
7703            newSelEnd = newStart;
7704
7705            if (!isFocused()) {
7706                mSelectionMoved = true;
7707            }
7708
7709            if (oldStart >= 0 || newStart >= 0) {
7710                invalidateCursor(Selection.getSelectionStart(buf), oldStart, newStart);
7711                registerForPreDraw();
7712                makeBlink();
7713            }
7714        }
7715
7716        if (what == Selection.SELECTION_START) {
7717            mHighlightPathBogus = true;
7718            selChanged = true;
7719            newSelStart = newStart;
7720
7721            if (!isFocused()) {
7722                mSelectionMoved = true;
7723            }
7724
7725            if (oldStart >= 0 || newStart >= 0) {
7726                int end = Selection.getSelectionEnd(buf);
7727                invalidateCursor(end, oldStart, newStart);
7728            }
7729        }
7730
7731        if (selChanged) {
7732            if ((buf.getSpanFlags(what)&Spanned.SPAN_INTERMEDIATE) == 0) {
7733                if (newSelStart < 0) {
7734                    newSelStart = Selection.getSelectionStart(buf);
7735                }
7736                if (newSelEnd < 0) {
7737                    newSelEnd = Selection.getSelectionEnd(buf);
7738                }
7739                onSelectionChanged(newSelStart, newSelEnd);
7740            }
7741        }
7742
7743        if (what instanceof UpdateAppearance || what instanceof ParagraphStyle) {
7744            if (ims == null || ims.mBatchEditNesting == 0) {
7745                invalidate();
7746                mHighlightPathBogus = true;
7747                checkForResize();
7748            } else {
7749                ims.mContentChanged = true;
7750            }
7751        }
7752
7753        if (MetaKeyKeyListener.isMetaTracker(buf, what)) {
7754            mHighlightPathBogus = true;
7755            if (ims != null && MetaKeyKeyListener.isSelectingMetaTracker(buf, what)) {
7756                ims.mSelectionModeChanged = true;
7757            }
7758
7759            if (Selection.getSelectionStart(buf) >= 0) {
7760                if (ims == null || ims.mBatchEditNesting == 0) {
7761                    invalidateCursor();
7762                } else {
7763                    ims.mCursorChanged = true;
7764                }
7765            }
7766        }
7767
7768        if (what instanceof ParcelableSpan) {
7769            // If this is a span that can be sent to a remote process,
7770            // the current extract editor would be interested in it.
7771            if (ims != null && ims.mExtracting != null) {
7772                if (ims.mBatchEditNesting != 0) {
7773                    if (oldStart >= 0) {
7774                        if (ims.mChangedStart > oldStart) {
7775                            ims.mChangedStart = oldStart;
7776                        }
7777                        if (ims.mChangedStart > oldEnd) {
7778                            ims.mChangedStart = oldEnd;
7779                        }
7780                    }
7781                    if (newStart >= 0) {
7782                        if (ims.mChangedStart > newStart) {
7783                            ims.mChangedStart = newStart;
7784                        }
7785                        if (ims.mChangedStart > newEnd) {
7786                            ims.mChangedStart = newEnd;
7787                        }
7788                    }
7789                } else {
7790                    if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Span change outside of batch: "
7791                            + oldStart + "-" + oldEnd + ","
7792                            + newStart + "-" + newEnd + what);
7793                    ims.mContentChanged = true;
7794                }
7795            }
7796        }
7797
7798        if (mSpellChecker != null && newStart < 0 && what instanceof SpellCheckSpan) {
7799            mSpellChecker.removeSpellCheckSpan((SpellCheckSpan) what);
7800        }
7801    }
7802
7803    /**
7804     * Create new SpellCheckSpans on the modified region.
7805     */
7806    private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) {
7807        if (isTextEditable() && isSuggestionsEnabled() && !(this instanceof ExtractEditText)) {
7808            if (mSpellChecker == null && createSpellChecker) {
7809                mSpellChecker = new SpellChecker(this);
7810            }
7811            if (mSpellChecker != null) {
7812                mSpellChecker.spellCheck(start, end);
7813            }
7814        }
7815    }
7816
7817    /**
7818     * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related
7819     * pop-up should be displayed.
7820     */
7821    private class EasyEditSpanController {
7822
7823        private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs
7824
7825        private EasyEditPopupWindow mPopupWindow;
7826
7827        private EasyEditSpan mEasyEditSpan;
7828
7829        private Runnable mHidePopup;
7830
7831        private void hide() {
7832            if (mPopupWindow != null) {
7833                mPopupWindow.hide();
7834                TextView.this.removeCallbacks(mHidePopup);
7835            }
7836            removeSpans(mText);
7837            mEasyEditSpan = null;
7838        }
7839
7840        /**
7841         * Monitors the changes in the text.
7842         *
7843         * <p>{@link ChangeWatcher#onSpanAdded(Spannable, Object, int, int)} cannot be used,
7844         * as the notifications are not sent when a spannable (with spans) is inserted.
7845         */
7846        public void onTextChange(CharSequence buffer) {
7847            adjustSpans(mText);
7848
7849            if (getWindowVisibility() != View.VISIBLE) {
7850                // The window is not visible yet, ignore the text change.
7851                return;
7852            }
7853
7854            if (mLayout == null) {
7855                // The view has not been layout yet, ignore the text change
7856                return;
7857            }
7858
7859            InputMethodManager imm = InputMethodManager.peekInstance();
7860            if (!(TextView.this instanceof ExtractEditText)
7861                    && imm != null && imm.isFullscreenMode()) {
7862                // The input is in extract mode. We do not have to handle the easy edit in the
7863                // original TextView, as the ExtractEditText will do
7864                return;
7865            }
7866
7867            // Remove the current easy edit span, as the text changed, and remove the pop-up
7868            // (if any)
7869            if (mEasyEditSpan != null) {
7870                if (mText instanceof Spannable) {
7871                    ((Spannable) mText).removeSpan(mEasyEditSpan);
7872                }
7873                mEasyEditSpan = null;
7874            }
7875            if (mPopupWindow != null && mPopupWindow.isShowing()) {
7876                mPopupWindow.hide();
7877            }
7878
7879            // Display the new easy edit span (if any).
7880            if (buffer instanceof Spanned) {
7881                mEasyEditSpan = getSpan((Spanned) buffer);
7882                if (mEasyEditSpan != null) {
7883                    if (mPopupWindow == null) {
7884                        mPopupWindow = new EasyEditPopupWindow();
7885                        mHidePopup = new Runnable() {
7886                            @Override
7887                            public void run() {
7888                                hide();
7889                            }
7890                        };
7891                    }
7892                    mPopupWindow.show(mEasyEditSpan);
7893                    TextView.this.removeCallbacks(mHidePopup);
7894                    TextView.this.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS);
7895                }
7896            }
7897        }
7898
7899        /**
7900         * Adjusts the spans by removing all of them except the last one.
7901         */
7902        private void adjustSpans(CharSequence buffer) {
7903            // This method enforces that only one easy edit span is attached to the text.
7904            // A better way to enforce this would be to listen for onSpanAdded, but this method
7905            // cannot be used in this scenario as no notification is triggered when a text with
7906            // spans is inserted into a text.
7907            if (buffer instanceof Spannable) {
7908                Spannable spannable = (Spannable) buffer;
7909                EasyEditSpan[] spans = spannable.getSpans(0, spannable.length(),
7910                        EasyEditSpan.class);
7911                for (int i = 0; i < spans.length - 1; i++) {
7912                    spannable.removeSpan(spans[i]);
7913                }
7914            }
7915        }
7916
7917        /**
7918         * Removes all the {@link EasyEditSpan} currently attached.
7919         */
7920        private void removeSpans(CharSequence buffer) {
7921            if (buffer instanceof Spannable) {
7922                Spannable spannable = (Spannable) buffer;
7923                EasyEditSpan[] spans = spannable.getSpans(0, spannable.length(),
7924                        EasyEditSpan.class);
7925                for (int i = 0; i < spans.length; i++) {
7926                    spannable.removeSpan(spans[i]);
7927                }
7928            }
7929        }
7930
7931        private EasyEditSpan getSpan(Spanned spanned) {
7932            EasyEditSpan[] easyEditSpans = spanned.getSpans(0, spanned.length(),
7933                    EasyEditSpan.class);
7934            if (easyEditSpans.length == 0) {
7935                return null;
7936            } else {
7937                return easyEditSpans[0];
7938            }
7939        }
7940    }
7941
7942    /**
7943     * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled
7944     * by {@link EasyEditSpanController}.
7945     */
7946    private class EasyEditPopupWindow extends PinnedPopupWindow
7947            implements OnClickListener {
7948        private static final int POPUP_TEXT_LAYOUT =
7949                com.android.internal.R.layout.text_edit_action_popup_text;
7950        private TextView mDeleteTextView;
7951        private EasyEditSpan mEasyEditSpan;
7952
7953        @Override
7954        protected void createPopupWindow() {
7955            mPopupWindow = new PopupWindow(TextView.this.mContext, null,
7956                    com.android.internal.R.attr.textSelectHandleWindowStyle);
7957            mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
7958            mPopupWindow.setClippingEnabled(true);
7959        }
7960
7961        @Override
7962        protected void initContentView() {
7963            LinearLayout linearLayout = new LinearLayout(TextView.this.getContext());
7964            linearLayout.setOrientation(LinearLayout.HORIZONTAL);
7965            mContentView = linearLayout;
7966            mContentView.setBackgroundResource(
7967                    com.android.internal.R.drawable.text_edit_side_paste_window);
7968
7969            LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
7970                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
7971
7972            LayoutParams wrapContent = new LayoutParams(
7973                    ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
7974
7975            mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
7976            mDeleteTextView.setLayoutParams(wrapContent);
7977            mDeleteTextView.setText(com.android.internal.R.string.delete);
7978            mDeleteTextView.setOnClickListener(this);
7979            mContentView.addView(mDeleteTextView);
7980        }
7981
7982        public void show(EasyEditSpan easyEditSpan) {
7983            mEasyEditSpan = easyEditSpan;
7984            super.show();
7985        }
7986
7987        @Override
7988        public void onClick(View view) {
7989            if (view == mDeleteTextView) {
7990                Editable editable = (Editable) mText;
7991                int start = editable.getSpanStart(mEasyEditSpan);
7992                int end = editable.getSpanEnd(mEasyEditSpan);
7993                if (start >= 0 && end >= 0) {
7994                    deleteText_internal(start, end);
7995                }
7996            }
7997        }
7998
7999        @Override
8000        protected int getTextOffset() {
8001            // Place the pop-up at the end of the span
8002            Editable editable = (Editable) mText;
8003            return editable.getSpanEnd(mEasyEditSpan);
8004        }
8005
8006        @Override
8007        protected int getVerticalLocalPosition(int line) {
8008            return mLayout.getLineBottom(line);
8009        }
8010
8011        @Override
8012        protected int clipVertically(int positionY) {
8013            // As we display the pop-up below the span, no vertical clipping is required.
8014            return positionY;
8015        }
8016    }
8017
8018    private class ChangeWatcher implements TextWatcher, SpanWatcher {
8019
8020        private CharSequence mBeforeText;
8021
8022        private EasyEditSpanController mEasyEditSpanController;
8023
8024        private ChangeWatcher() {
8025            mEasyEditSpanController = new EasyEditSpanController();
8026        }
8027
8028        public void beforeTextChanged(CharSequence buffer, int start,
8029                                      int before, int after) {
8030            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "beforeTextChanged start=" + start
8031                    + " before=" + before + " after=" + after + ": " + buffer);
8032
8033            if (AccessibilityManager.getInstance(mContext).isEnabled()
8034                    && !isPasswordInputType(mInputType)
8035                    && !hasPasswordTransformationMethod()) {
8036                mBeforeText = buffer.toString();
8037            }
8038
8039            TextView.this.sendBeforeTextChanged(buffer, start, before, after);
8040        }
8041
8042        public void onTextChanged(CharSequence buffer, int start,
8043                                  int before, int after) {
8044            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onTextChanged start=" + start
8045                    + " before=" + before + " after=" + after + ": " + buffer);
8046            TextView.this.handleTextChanged(buffer, start, before, after);
8047
8048            mEasyEditSpanController.onTextChange(buffer);
8049
8050            if (AccessibilityManager.getInstance(mContext).isEnabled() &&
8051                    (isFocused() || isSelected() && isShown())) {
8052                sendAccessibilityEventTypeViewTextChanged(mBeforeText, start, before, after);
8053                mBeforeText = null;
8054            }
8055        }
8056
8057        public void afterTextChanged(Editable buffer) {
8058            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "afterTextChanged: " + buffer);
8059            TextView.this.sendAfterTextChanged(buffer);
8060
8061            if (MetaKeyKeyListener.getMetaState(buffer, MetaKeyKeyListener.META_SELECTING) != 0) {
8062                MetaKeyKeyListener.stopSelecting(TextView.this, buffer);
8063            }
8064        }
8065
8066        public void onSpanChanged(Spannable buf,
8067                                  Object what, int s, int e, int st, int en) {
8068            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanChanged s=" + s + " e=" + e
8069                    + " st=" + st + " en=" + en + " what=" + what + ": " + buf);
8070            TextView.this.spanChange(buf, what, s, st, e, en);
8071        }
8072
8073        public void onSpanAdded(Spannable buf, Object what, int s, int e) {
8074            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanAdded s=" + s + " e=" + e
8075                    + " what=" + what + ": " + buf);
8076            TextView.this.spanChange(buf, what, -1, s, -1, e);
8077        }
8078
8079        public void onSpanRemoved(Spannable buf, Object what, int s, int e) {
8080            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanRemoved s=" + s + " e=" + e
8081                    + " what=" + what + ": " + buf);
8082            TextView.this.spanChange(buf, what, s, -1, e, -1);
8083        }
8084
8085        private void hideControllers() {
8086            mEasyEditSpanController.hide();
8087        }
8088    }
8089
8090    /**
8091     * @hide
8092     */
8093    @Override
8094    public void dispatchFinishTemporaryDetach() {
8095        mDispatchTemporaryDetach = true;
8096        super.dispatchFinishTemporaryDetach();
8097        mDispatchTemporaryDetach = false;
8098    }
8099
8100    @Override
8101    public void onStartTemporaryDetach() {
8102        super.onStartTemporaryDetach();
8103        // Only track when onStartTemporaryDetach() is called directly,
8104        // usually because this instance is an editable field in a list
8105        if (!mDispatchTemporaryDetach) mTemporaryDetach = true;
8106
8107        // Because of View recycling in ListView, there is no easy way to know when a TextView with
8108        // selection becomes visible again. Until a better solution is found, stop text selection
8109        // mode (if any) as soon as this TextView is recycled.
8110        hideControllers();
8111    }
8112
8113    @Override
8114    public void onFinishTemporaryDetach() {
8115        super.onFinishTemporaryDetach();
8116        // Only track when onStartTemporaryDetach() is called directly,
8117        // usually because this instance is an editable field in a list
8118        if (!mDispatchTemporaryDetach) mTemporaryDetach = false;
8119    }
8120
8121    @Override
8122    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
8123        if (mTemporaryDetach) {
8124            // If we are temporarily in the detach state, then do nothing.
8125            super.onFocusChanged(focused, direction, previouslyFocusedRect);
8126            return;
8127        }
8128
8129        mShowCursor = SystemClock.uptimeMillis();
8130
8131        ensureEndedBatchEdit();
8132
8133        if (focused) {
8134            int selStart = getSelectionStart();
8135            int selEnd = getSelectionEnd();
8136
8137            // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection
8138            // mode for these, unless there was a specific selection already started.
8139            final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 &&
8140                    selEnd == mText.length();
8141            mCreatedWithASelection = mFrozenWithFocus && hasSelection() && !isFocusHighlighted;
8142
8143            if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) {
8144                // If a tap was used to give focus to that view, move cursor at tap position.
8145                // Has to be done before onTakeFocus, which can be overloaded.
8146                final int lastTapPosition = getLastTapPosition();
8147                if (lastTapPosition >= 0) {
8148                    Selection.setSelection((Spannable) mText, lastTapPosition);
8149                }
8150
8151                if (mMovement != null) {
8152                    mMovement.onTakeFocus(this, (Spannable) mText, direction);
8153                }
8154
8155                // The DecorView does not have focus when the 'Done' ExtractEditText button is
8156                // pressed. Since it is the ViewAncestor's mView, it requests focus before
8157                // ExtractEditText clears focus, which gives focus to the ExtractEditText.
8158                // This special case ensure that we keep current selection in that case.
8159                // It would be better to know why the DecorView does not have focus at that time.
8160                if (((this instanceof ExtractEditText) || mSelectionMoved) &&
8161                        selStart >= 0 && selEnd >= 0) {
8162                    /*
8163                     * Someone intentionally set the selection, so let them
8164                     * do whatever it is that they wanted to do instead of
8165                     * the default on-focus behavior.  We reset the selection
8166                     * here instead of just skipping the onTakeFocus() call
8167                     * because some movement methods do something other than
8168                     * just setting the selection in theirs and we still
8169                     * need to go through that path.
8170                     */
8171                    Selection.setSelection((Spannable) mText, selStart, selEnd);
8172                }
8173
8174                if (mSelectAllOnFocus) {
8175                    selectAll();
8176                }
8177
8178                mTouchFocusSelected = true;
8179            }
8180
8181            mFrozenWithFocus = false;
8182            mSelectionMoved = false;
8183
8184            if (mText instanceof Spannable) {
8185                Spannable sp = (Spannable) mText;
8186                MetaKeyKeyListener.resetMetaState(sp);
8187            }
8188
8189            makeBlink();
8190
8191            if (mError != null) {
8192                showError();
8193            }
8194        } else {
8195            if (mError != null) {
8196                hideError();
8197            }
8198            // Don't leave us in the middle of a batch edit.
8199            onEndBatchEdit();
8200
8201            if (this instanceof ExtractEditText) {
8202                // terminateTextSelectionMode removes selection, which we want to keep when
8203                // ExtractEditText goes out of focus.
8204                final int selStart = getSelectionStart();
8205                final int selEnd = getSelectionEnd();
8206                hideControllers();
8207                Selection.setSelection((Spannable) mText, selStart, selEnd);
8208            } else {
8209                hideControllers();
8210                downgradeEasyCorrectionSpans();
8211            }
8212
8213            // No need to create the controller
8214            if (mSelectionModifierCursorController != null) {
8215                mSelectionModifierCursorController.resetTouchOffsets();
8216            }
8217        }
8218
8219        startStopMarquee(focused);
8220
8221        if (mTransformation != null) {
8222            mTransformation.onFocusChanged(this, mText, focused, direction, previouslyFocusedRect);
8223        }
8224
8225        super.onFocusChanged(focused, direction, previouslyFocusedRect);
8226    }
8227
8228    private int getLastTapPosition() {
8229        // No need to create the controller at that point, no last tap position saved
8230        if (mSelectionModifierCursorController != null) {
8231            int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset();
8232            if (lastTapPosition >= 0) {
8233                // Safety check, should not be possible.
8234                if (lastTapPosition > mText.length()) {
8235                    Log.e(LOG_TAG, "Invalid tap focus position (" + lastTapPosition + " vs "
8236                            + mText.length() + ")");
8237                    lastTapPosition = mText.length();
8238                }
8239                return lastTapPosition;
8240            }
8241        }
8242
8243        return -1;
8244    }
8245
8246    @Override
8247    public void onWindowFocusChanged(boolean hasWindowFocus) {
8248        super.onWindowFocusChanged(hasWindowFocus);
8249
8250        if (hasWindowFocus) {
8251            if (mBlink != null) {
8252                mBlink.uncancel();
8253                makeBlink();
8254            }
8255        } else {
8256            if (mBlink != null) {
8257                mBlink.cancel();
8258            }
8259            // Don't leave us in the middle of a batch edit.
8260            onEndBatchEdit();
8261            if (mInputContentType != null) {
8262                mInputContentType.enterDown = false;
8263            }
8264
8265            hideControllers();
8266            if (mSuggestionsPopupWindow != null) {
8267                mSuggestionsPopupWindow.onParentLostFocus();
8268            }
8269        }
8270
8271        startStopMarquee(hasWindowFocus);
8272    }
8273
8274    @Override
8275    protected void onVisibilityChanged(View changedView, int visibility) {
8276        super.onVisibilityChanged(changedView, visibility);
8277        if (visibility != VISIBLE) {
8278            hideControllers();
8279        }
8280    }
8281
8282    /**
8283     * Use {@link BaseInputConnection#removeComposingSpans
8284     * BaseInputConnection.removeComposingSpans()} to remove any IME composing
8285     * state from this text view.
8286     */
8287    public void clearComposingText() {
8288        if (mText instanceof Spannable) {
8289            BaseInputConnection.removeComposingSpans((Spannable)mText);
8290        }
8291    }
8292
8293    @Override
8294    public void setSelected(boolean selected) {
8295        boolean wasSelected = isSelected();
8296
8297        super.setSelected(selected);
8298
8299        if (selected != wasSelected && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
8300            if (selected) {
8301                startMarquee();
8302            } else {
8303                stopMarquee();
8304            }
8305        }
8306    }
8307
8308    @Override
8309    public boolean onTouchEvent(MotionEvent event) {
8310        final int action = event.getActionMasked();
8311
8312        if (hasSelectionController()) {
8313            getSelectionController().onTouchEvent(event);
8314        }
8315
8316        if (action == MotionEvent.ACTION_DOWN) {
8317            mLastDownPositionX = event.getX();
8318            mLastDownPositionY = event.getY();
8319
8320            // Reset this state; it will be re-set if super.onTouchEvent
8321            // causes focus to move to the view.
8322            mTouchFocusSelected = false;
8323            mIgnoreActionUpEvent = false;
8324        }
8325
8326        final boolean superResult = super.onTouchEvent(event);
8327
8328        /*
8329         * Don't handle the release after a long press, because it will
8330         * move the selection away from whatever the menu action was
8331         * trying to affect.
8332         */
8333        if (mDiscardNextActionUp && action == MotionEvent.ACTION_UP) {
8334            mDiscardNextActionUp = false;
8335            return superResult;
8336        }
8337
8338        final boolean touchIsFinished = (action == MotionEvent.ACTION_UP) &&
8339                !shouldIgnoreActionUpEvent() && isFocused();
8340
8341         if ((mMovement != null || onCheckIsTextEditor()) && isEnabled()
8342                && mText instanceof Spannable && mLayout != null) {
8343            boolean handled = false;
8344
8345            if (mMovement != null) {
8346                handled |= mMovement.onTouchEvent(this, (Spannable) mText, event);
8347            }
8348
8349            if (touchIsFinished && mLinksClickable && mAutoLinkMask != 0 && mTextIsSelectable) {
8350                // The LinkMovementMethod which should handle taps on links has not been installed
8351                // on non editable text that support text selection.
8352                // We reproduce its behavior here to open links for these.
8353                ClickableSpan[] links = ((Spannable) mText).getSpans(getSelectionStart(),
8354                        getSelectionEnd(), ClickableSpan.class);
8355
8356                if (links.length != 0) {
8357                    links[0].onClick(this);
8358                    handled = true;
8359                }
8360            }
8361
8362            if (touchIsFinished && (isTextEditable() || mTextIsSelectable)) {
8363                // Show the IME, except when selecting in read-only text.
8364                final InputMethodManager imm = InputMethodManager.peekInstance();
8365                viewClicked(imm);
8366                if (!mTextIsSelectable && mSoftInputShownOnFocus) {
8367                    handled |= imm != null && imm.showSoftInput(this, 0);
8368                }
8369
8370                boolean selectAllGotFocus = mSelectAllOnFocus && didTouchFocusSelect();
8371                hideControllers();
8372                if (!selectAllGotFocus && mText.length() > 0) {
8373                    if (mSpellChecker != null) {
8374                        // When the cursor moves, the word that was typed may need spell check
8375                        mSpellChecker.onSelectionChanged();
8376                    }
8377                    if (!extractedTextModeWillBeStarted()) {
8378                        if (isCursorInsideEasyCorrectionSpan()) {
8379                            showSuggestions();
8380                        } else if (hasInsertionController()) {
8381                            getInsertionController().show();
8382                        }
8383                    }
8384                }
8385
8386                handled = true;
8387            }
8388
8389            if (handled) {
8390                return true;
8391            }
8392        }
8393
8394        return superResult;
8395    }
8396
8397    /**
8398     * @return <code>true</code> if the cursor/current selection overlaps a {@link SuggestionSpan}.
8399     */
8400    private boolean isCursorInsideSuggestionSpan() {
8401        if (!(mText instanceof Spannable)) return false;
8402
8403        SuggestionSpan[] suggestionSpans = ((Spannable) mText).getSpans(getSelectionStart(),
8404                getSelectionEnd(), SuggestionSpan.class);
8405        return (suggestionSpans.length > 0);
8406    }
8407
8408    /**
8409     * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with
8410     * {@link SuggestionSpan#FLAG_EASY_CORRECT} set.
8411     */
8412    private boolean isCursorInsideEasyCorrectionSpan() {
8413        Spannable spannable = (Spannable) mText;
8414        SuggestionSpan[] suggestionSpans = spannable.getSpans(getSelectionStart(),
8415                getSelectionEnd(), SuggestionSpan.class);
8416        for (int i = 0; i < suggestionSpans.length; i++) {
8417            if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) {
8418                return true;
8419            }
8420        }
8421        return false;
8422    }
8423
8424    /**
8425     * Downgrades to simple suggestions all the easy correction spans that are not a spell check
8426     * span.
8427     */
8428    private void downgradeEasyCorrectionSpans() {
8429        if (mText instanceof Spannable) {
8430            Spannable spannable = (Spannable) mText;
8431            SuggestionSpan[] suggestionSpans = spannable.getSpans(0,
8432                    spannable.length(), SuggestionSpan.class);
8433            for (int i = 0; i < suggestionSpans.length; i++) {
8434                int flags = suggestionSpans[i].getFlags();
8435                if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0
8436                        && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) {
8437                    flags &= ~SuggestionSpan.FLAG_EASY_CORRECT;
8438                    suggestionSpans[i].setFlags(flags);
8439                }
8440            }
8441        }
8442    }
8443
8444    @Override
8445    public boolean onGenericMotionEvent(MotionEvent event) {
8446        if (mMovement != null && mText instanceof Spannable && mLayout != null) {
8447            try {
8448                if (mMovement.onGenericMotionEvent(this, (Spannable) mText, event)) {
8449                    return true;
8450                }
8451            } catch (AbstractMethodError ex) {
8452                // onGenericMotionEvent was added to the MovementMethod interface in API 12.
8453                // Ignore its absence in case third party applications implemented the
8454                // interface directly.
8455            }
8456        }
8457        return super.onGenericMotionEvent(event);
8458    }
8459
8460    private void prepareCursorControllers() {
8461        boolean windowSupportsHandles = false;
8462
8463        ViewGroup.LayoutParams params = getRootView().getLayoutParams();
8464        if (params instanceof WindowManager.LayoutParams) {
8465            WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params;
8466            windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW
8467                    || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW;
8468        }
8469
8470        mInsertionControllerEnabled = windowSupportsHandles && isCursorVisible() && mLayout != null;
8471        mSelectionControllerEnabled = windowSupportsHandles && textCanBeSelected() &&
8472                mLayout != null;
8473
8474        if (!mInsertionControllerEnabled) {
8475            hideInsertionPointCursorController();
8476            if (mInsertionPointCursorController != null) {
8477                mInsertionPointCursorController.onDetached();
8478                mInsertionPointCursorController = null;
8479            }
8480        }
8481
8482        if (!mSelectionControllerEnabled) {
8483            stopSelectionActionMode();
8484            if (mSelectionModifierCursorController != null) {
8485                mSelectionModifierCursorController.onDetached();
8486                mSelectionModifierCursorController = null;
8487            }
8488        }
8489    }
8490
8491    /**
8492     * @return True iff this TextView contains a text that can be edited, or if this is
8493     * a selectable TextView.
8494     */
8495    private boolean isTextEditable() {
8496        return mText instanceof Editable && onCheckIsTextEditor() && isEnabled();
8497    }
8498
8499    /**
8500     * Returns true, only while processing a touch gesture, if the initial
8501     * touch down event caused focus to move to the text view and as a result
8502     * its selection changed.  Only valid while processing the touch gesture
8503     * of interest.
8504     */
8505    public boolean didTouchFocusSelect() {
8506        return mTouchFocusSelected;
8507    }
8508
8509    @Override
8510    public void cancelLongPress() {
8511        super.cancelLongPress();
8512        mIgnoreActionUpEvent = true;
8513    }
8514
8515    /**
8516     * This method is only valid during a touch event.
8517     *
8518     * @return true when the ACTION_UP event should be ignored, false otherwise.
8519     *
8520     * @hide
8521     */
8522    public boolean shouldIgnoreActionUpEvent() {
8523        return mIgnoreActionUpEvent;
8524    }
8525
8526    @Override
8527    public boolean onTrackballEvent(MotionEvent event) {
8528        if (mMovement != null && mText instanceof Spannable &&
8529            mLayout != null) {
8530            if (mMovement.onTrackballEvent(this, (Spannable) mText, event)) {
8531                return true;
8532            }
8533        }
8534
8535        return super.onTrackballEvent(event);
8536    }
8537
8538    public void setScroller(Scroller s) {
8539        mScroller = s;
8540    }
8541
8542    private static class Blink extends Handler implements Runnable {
8543        private final WeakReference<TextView> mView;
8544        private boolean mCancelled;
8545
8546        public Blink(TextView v) {
8547            mView = new WeakReference<TextView>(v);
8548        }
8549
8550        public void run() {
8551            if (mCancelled) {
8552                return;
8553            }
8554
8555            removeCallbacks(Blink.this);
8556
8557            TextView tv = mView.get();
8558
8559            if (tv != null && tv.shouldBlink()) {
8560                if (tv.mLayout != null) {
8561                    tv.invalidateCursorPath();
8562                }
8563
8564                postAtTime(this, SystemClock.uptimeMillis() + BLINK);
8565            }
8566        }
8567
8568        void cancel() {
8569            if (!mCancelled) {
8570                removeCallbacks(Blink.this);
8571                mCancelled = true;
8572            }
8573        }
8574
8575        void uncancel() {
8576            mCancelled = false;
8577        }
8578    }
8579
8580    /**
8581     * @return True when the TextView isFocused and has a valid zero-length selection (cursor).
8582     */
8583    private boolean shouldBlink() {
8584        if (!isFocused()) return false;
8585
8586        final int start = getSelectionStart();
8587        if (start < 0) return false;
8588
8589        final int end = getSelectionEnd();
8590        if (end < 0) return false;
8591
8592        return start == end;
8593    }
8594
8595    private void makeBlink() {
8596        if (isCursorVisible()) {
8597            if (shouldBlink()) {
8598                mShowCursor = SystemClock.uptimeMillis();
8599                if (mBlink == null) mBlink = new Blink(this);
8600                mBlink.removeCallbacks(mBlink);
8601                mBlink.postAtTime(mBlink, mShowCursor + BLINK);
8602            }
8603        } else {
8604            if (mBlink != null) mBlink.removeCallbacks(mBlink);
8605        }
8606    }
8607
8608    @Override
8609    protected float getLeftFadingEdgeStrength() {
8610        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
8611        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
8612                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
8613            if (mMarquee != null && !mMarquee.isStopped()) {
8614                final Marquee marquee = mMarquee;
8615                if (marquee.shouldDrawLeftFade()) {
8616                    return marquee.mScroll / getHorizontalFadingEdgeLength();
8617                } else {
8618                    return 0.0f;
8619                }
8620            } else if (getLineCount() == 1) {
8621                final int layoutDirection = getResolvedLayoutDirection();
8622                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8623                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8624                    case Gravity.LEFT:
8625                        return 0.0f;
8626                    case Gravity.RIGHT:
8627                        return (mLayout.getLineRight(0) - (mRight - mLeft) -
8628                                getCompoundPaddingLeft() - getCompoundPaddingRight() -
8629                                mLayout.getLineLeft(0)) / getHorizontalFadingEdgeLength();
8630                    case Gravity.CENTER_HORIZONTAL:
8631                        return 0.0f;
8632                }
8633            }
8634        }
8635        return super.getLeftFadingEdgeStrength();
8636    }
8637
8638    @Override
8639    protected float getRightFadingEdgeStrength() {
8640        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
8641        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
8642                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
8643            if (mMarquee != null && !mMarquee.isStopped()) {
8644                final Marquee marquee = mMarquee;
8645                return (marquee.mMaxFadeScroll - marquee.mScroll) / getHorizontalFadingEdgeLength();
8646            } else if (getLineCount() == 1) {
8647                final int layoutDirection = getResolvedLayoutDirection();
8648                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8649                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8650                    case Gravity.LEFT:
8651                        final int textWidth = (mRight - mLeft) - getCompoundPaddingLeft() -
8652                                getCompoundPaddingRight();
8653                        final float lineWidth = mLayout.getLineWidth(0);
8654                        return (lineWidth - textWidth) / getHorizontalFadingEdgeLength();
8655                    case Gravity.RIGHT:
8656                        return 0.0f;
8657                    case Gravity.CENTER_HORIZONTAL:
8658                    case Gravity.FILL_HORIZONTAL:
8659                        return (mLayout.getLineWidth(0) - ((mRight - mLeft) -
8660                                getCompoundPaddingLeft() - getCompoundPaddingRight())) /
8661                                getHorizontalFadingEdgeLength();
8662                }
8663            }
8664        }
8665        return super.getRightFadingEdgeStrength();
8666    }
8667
8668    @Override
8669    protected int computeHorizontalScrollRange() {
8670        if (mLayout != null) {
8671            return mSingleLine && (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) == Gravity.LEFT ?
8672                    (int) mLayout.getLineWidth(0) : mLayout.getWidth();
8673        }
8674
8675        return super.computeHorizontalScrollRange();
8676    }
8677
8678    @Override
8679    protected int computeVerticalScrollRange() {
8680        if (mLayout != null)
8681            return mLayout.getHeight();
8682
8683        return super.computeVerticalScrollRange();
8684    }
8685
8686    @Override
8687    protected int computeVerticalScrollExtent() {
8688        return getHeight() - getCompoundPaddingTop() - getCompoundPaddingBottom();
8689    }
8690
8691    @Override
8692    public void findViewsWithText(ArrayList<View> outViews, CharSequence searched, int flags) {
8693        super.findViewsWithText(outViews, searched, flags);
8694        if (!outViews.contains(this) && (flags & FIND_VIEWS_WITH_TEXT) != 0
8695                && !TextUtils.isEmpty(searched) && !TextUtils.isEmpty(mText)) {
8696            String searchedLowerCase = searched.toString().toLowerCase();
8697            String textLowerCase = mText.toString().toLowerCase();
8698            if (textLowerCase.contains(searchedLowerCase)) {
8699                outViews.add(this);
8700            }
8701        }
8702    }
8703
8704    public enum BufferType {
8705        NORMAL, SPANNABLE, EDITABLE,
8706    }
8707
8708    /**
8709     * Returns the TextView_textColor attribute from the
8710     * Resources.StyledAttributes, if set, or the TextAppearance_textColor
8711     * from the TextView_textAppearance attribute, if TextView_textColor
8712     * was not set directly.
8713     */
8714    public static ColorStateList getTextColors(Context context, TypedArray attrs) {
8715        ColorStateList colors;
8716        colors = attrs.getColorStateList(com.android.internal.R.styleable.
8717                                         TextView_textColor);
8718
8719        if (colors == null) {
8720            int ap = attrs.getResourceId(com.android.internal.R.styleable.
8721                                         TextView_textAppearance, -1);
8722            if (ap != -1) {
8723                TypedArray appearance;
8724                appearance = context.obtainStyledAttributes(ap,
8725                                            com.android.internal.R.styleable.TextAppearance);
8726                colors = appearance.getColorStateList(com.android.internal.R.styleable.
8727                                                  TextAppearance_textColor);
8728                appearance.recycle();
8729            }
8730        }
8731
8732        return colors;
8733    }
8734
8735    /**
8736     * Returns the default color from the TextView_textColor attribute
8737     * from the AttributeSet, if set, or the default color from the
8738     * TextAppearance_textColor from the TextView_textAppearance attribute,
8739     * if TextView_textColor was not set directly.
8740     */
8741    public static int getTextColor(Context context,
8742                                   TypedArray attrs,
8743                                   int def) {
8744        ColorStateList colors = getTextColors(context, attrs);
8745
8746        if (colors == null) {
8747            return def;
8748        } else {
8749            return colors.getDefaultColor();
8750        }
8751    }
8752
8753    @Override
8754    public boolean onKeyShortcut(int keyCode, KeyEvent event) {
8755        final int filteredMetaState = event.getMetaState() & ~KeyEvent.META_CTRL_MASK;
8756        if (KeyEvent.metaStateHasNoModifiers(filteredMetaState)) {
8757            switch (keyCode) {
8758            case KeyEvent.KEYCODE_A:
8759                if (canSelectText()) {
8760                    return onTextContextMenuItem(ID_SELECT_ALL);
8761                }
8762                break;
8763            case KeyEvent.KEYCODE_X:
8764                if (canCut()) {
8765                    return onTextContextMenuItem(ID_CUT);
8766                }
8767                break;
8768            case KeyEvent.KEYCODE_C:
8769                if (canCopy()) {
8770                    return onTextContextMenuItem(ID_COPY);
8771                }
8772                break;
8773            case KeyEvent.KEYCODE_V:
8774                if (canPaste()) {
8775                    return onTextContextMenuItem(ID_PASTE);
8776                }
8777                break;
8778            }
8779        }
8780        return super.onKeyShortcut(keyCode, event);
8781    }
8782
8783    /**
8784     * Unlike {@link #textCanBeSelected()}, this method is based on the <i>current</i> state of the
8785     * TextView. {@link #textCanBeSelected()} has to be true (this is one of the conditions to have
8786     * a selection controller (see {@link #prepareCursorControllers()}), but this is not sufficient.
8787     */
8788    private boolean canSelectText() {
8789        return hasSelectionController() && mText.length() != 0;
8790    }
8791
8792    /**
8793     * Test based on the <i>intrinsic</i> charateristics of the TextView.
8794     * The text must be spannable and the movement method must allow for arbitary selection.
8795     *
8796     * See also {@link #canSelectText()}.
8797     */
8798    private boolean textCanBeSelected() {
8799        // prepareCursorController() relies on this method.
8800        // If you change this condition, make sure prepareCursorController is called anywhere
8801        // the value of this condition might be changed.
8802        if (mMovement == null || !mMovement.canSelectArbitrarily()) return false;
8803        return isTextEditable() || (mTextIsSelectable && mText instanceof Spannable && isEnabled());
8804    }
8805
8806    private boolean canCut() {
8807        if (hasPasswordTransformationMethod()) {
8808            return false;
8809        }
8810
8811        if (mText.length() > 0 && hasSelection() && mText instanceof Editable && mInput != null) {
8812            return true;
8813        }
8814
8815        return false;
8816    }
8817
8818    private boolean canCopy() {
8819        if (hasPasswordTransformationMethod()) {
8820            return false;
8821        }
8822
8823        if (mText.length() > 0 && hasSelection()) {
8824            return true;
8825        }
8826
8827        return false;
8828    }
8829
8830    private boolean canPaste() {
8831        return (mText instanceof Editable &&
8832                mInput != null &&
8833                getSelectionStart() >= 0 &&
8834                getSelectionEnd() >= 0 &&
8835                ((ClipboardManager)getContext().getSystemService(Context.CLIPBOARD_SERVICE)).
8836                hasPrimaryClip());
8837    }
8838
8839    private static long packRangeInLong(int start, int end) {
8840        return (((long) start) << 32) | end;
8841    }
8842
8843    private static int extractRangeStartFromLong(long range) {
8844        return (int) (range >>> 32);
8845    }
8846
8847    private static int extractRangeEndFromLong(long range) {
8848        return (int) (range & 0x00000000FFFFFFFFL);
8849    }
8850
8851    private boolean selectAll() {
8852        final int length = mText.length();
8853        Selection.setSelection((Spannable) mText, 0, length);
8854        return length > 0;
8855    }
8856
8857    /**
8858     * Adjusts selection to the word under last touch offset.
8859     * Return true if the operation was successfully performed.
8860     */
8861    private boolean selectCurrentWord() {
8862        if (!canSelectText()) {
8863            return false;
8864        }
8865
8866        if (hasPasswordTransformationMethod()) {
8867            // Always select all on a password field.
8868            // Cut/copy menu entries are not available for passwords, but being able to select all
8869            // is however useful to delete or paste to replace the entire content.
8870            return selectAll();
8871        }
8872
8873        int klass = mInputType & InputType.TYPE_MASK_CLASS;
8874        int variation = mInputType & InputType.TYPE_MASK_VARIATION;
8875
8876        // Specific text field types: select the entire text for these
8877        if (klass == InputType.TYPE_CLASS_NUMBER ||
8878                klass == InputType.TYPE_CLASS_PHONE ||
8879                klass == InputType.TYPE_CLASS_DATETIME ||
8880                variation == InputType.TYPE_TEXT_VARIATION_URI ||
8881                variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS ||
8882                variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS ||
8883                variation == InputType.TYPE_TEXT_VARIATION_FILTER) {
8884            return selectAll();
8885        }
8886
8887        long lastTouchOffsets = getLastTouchOffsets();
8888        final int minOffset = extractRangeStartFromLong(lastTouchOffsets);
8889        final int maxOffset = extractRangeEndFromLong(lastTouchOffsets);
8890
8891        // Safety check in case standard touch event handling has been bypassed
8892        if (minOffset < 0 || minOffset >= mText.length()) return false;
8893        if (maxOffset < 0 || maxOffset >= mText.length()) return false;
8894
8895        int selectionStart, selectionEnd;
8896
8897        // If a URLSpan (web address, email, phone...) is found at that position, select it.
8898        URLSpan[] urlSpans = ((Spanned) mText).getSpans(minOffset, maxOffset, URLSpan.class);
8899        if (urlSpans.length >= 1) {
8900            URLSpan urlSpan = urlSpans[0];
8901            selectionStart = ((Spanned) mText).getSpanStart(urlSpan);
8902            selectionEnd = ((Spanned) mText).getSpanEnd(urlSpan);
8903        } else {
8904            final WordIterator wordIterator = getWordIterator();
8905            wordIterator.setCharSequence(mText, minOffset, maxOffset);
8906
8907            selectionStart = wordIterator.getBeginning(minOffset);
8908            if (selectionStart == BreakIterator.DONE) return false;
8909
8910            selectionEnd = wordIterator.getEnd(maxOffset);
8911            if (selectionEnd == BreakIterator.DONE) return false;
8912
8913            if (selectionStart == selectionEnd) {
8914                // Possible when the word iterator does not properly handle the text's language
8915                long range = getCharRange(selectionStart);
8916                selectionStart = extractRangeStartFromLong(range);
8917                selectionEnd = extractRangeEndFromLong(range);
8918            }
8919        }
8920
8921        Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
8922        return selectionEnd > selectionStart;
8923    }
8924
8925    /**
8926     * This is a temporary method. Future versions may support multi-locale text.
8927     *
8928     * @return The locale that should be used for a word iterator and a spell checker
8929     * in this TextView, based on the current spell checker settings,
8930     * the current IME's locale, or the system default locale.
8931     * @hide
8932     */
8933    public Locale getTextServicesLocale() {
8934        Locale locale = Locale.getDefault();
8935        final TextServicesManager textServicesManager = (TextServicesManager)
8936                mContext.getSystemService(Context.TEXT_SERVICES_MANAGER_SERVICE);
8937        final SpellCheckerSubtype subtype = textServicesManager.getCurrentSpellCheckerSubtype(true);
8938        if (subtype != null) {
8939            locale = new Locale(subtype.getLocale());
8940        }
8941        return locale;
8942    }
8943
8944    void onLocaleChanged() {
8945        // Will be re-created on demand in getWordIterator with the proper new locale
8946        mWordIterator = null;
8947    }
8948
8949    /**
8950     * @hide
8951     */
8952    public WordIterator getWordIterator() {
8953        if (mWordIterator == null) {
8954            mWordIterator = new WordIterator(getTextServicesLocale());
8955        }
8956        return mWordIterator;
8957    }
8958
8959    private long getCharRange(int offset) {
8960        final int textLength = mText.length();
8961        if (offset + 1 < textLength) {
8962            final char currentChar = mText.charAt(offset);
8963            final char nextChar = mText.charAt(offset + 1);
8964            if (Character.isSurrogatePair(currentChar, nextChar)) {
8965                return packRangeInLong(offset,  offset + 2);
8966            }
8967        }
8968        if (offset < textLength) {
8969            return packRangeInLong(offset,  offset + 1);
8970        }
8971        if (offset - 2 >= 0) {
8972            final char previousChar = mText.charAt(offset - 1);
8973            final char previousPreviousChar = mText.charAt(offset - 2);
8974            if (Character.isSurrogatePair(previousPreviousChar, previousChar)) {
8975                return packRangeInLong(offset - 2,  offset);
8976            }
8977        }
8978        if (offset - 1 >= 0) {
8979            return packRangeInLong(offset - 1,  offset);
8980        }
8981        return packRangeInLong(offset,  offset);
8982    }
8983
8984    private long getLastTouchOffsets() {
8985        SelectionModifierCursorController selectionController = getSelectionController();
8986        final int minOffset = selectionController.getMinTouchOffset();
8987        final int maxOffset = selectionController.getMaxTouchOffset();
8988        return packRangeInLong(minOffset, maxOffset);
8989    }
8990
8991    @Override
8992    public void onPopulateAccessibilityEvent(AccessibilityEvent event) {
8993        super.onPopulateAccessibilityEvent(event);
8994
8995        final boolean isPassword = hasPasswordTransformationMethod();
8996        if (!isPassword) {
8997            CharSequence text = getTextForAccessibility();
8998            if (!TextUtils.isEmpty(text)) {
8999                event.getText().add(text);
9000            }
9001        }
9002    }
9003
9004    @Override
9005    public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
9006        super.onInitializeAccessibilityEvent(event);
9007
9008        final boolean isPassword = hasPasswordTransformationMethod();
9009        event.setPassword(isPassword);
9010
9011        if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED) {
9012            event.setFromIndex(Selection.getSelectionStart(mText));
9013            event.setToIndex(Selection.getSelectionEnd(mText));
9014            event.setItemCount(mText.length());
9015        }
9016    }
9017
9018    @Override
9019    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
9020        super.onInitializeAccessibilityNodeInfo(info);
9021
9022        final boolean isPassword = hasPasswordTransformationMethod();
9023        if (!isPassword) {
9024            info.setText(getTextForAccessibility());
9025        }
9026        info.setPassword(isPassword);
9027    }
9028
9029    @Override
9030    public void sendAccessibilityEvent(int eventType) {
9031        // Do not send scroll events since first they are not interesting for
9032        // accessibility and second such events a generated too frequently.
9033        // For details see the implementation of bringTextIntoView().
9034        if (eventType == AccessibilityEvent.TYPE_VIEW_SCROLLED) {
9035            return;
9036        }
9037        super.sendAccessibilityEvent(eventType);
9038    }
9039
9040    /**
9041     * Gets the text reported for accessibility purposes. It is the
9042     * text if not empty or the hint.
9043     *
9044     * @return The accessibility text.
9045     */
9046    private CharSequence getTextForAccessibility() {
9047        CharSequence text = getText();
9048        if (TextUtils.isEmpty(text)) {
9049            text = getHint();
9050        }
9051        return text;
9052    }
9053
9054    void sendAccessibilityEventTypeViewTextChanged(CharSequence beforeText,
9055            int fromIndex, int removedCount, int addedCount) {
9056        AccessibilityEvent event =
9057            AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
9058        event.setFromIndex(fromIndex);
9059        event.setRemovedCount(removedCount);
9060        event.setAddedCount(addedCount);
9061        event.setBeforeText(beforeText);
9062        sendAccessibilityEventUnchecked(event);
9063    }
9064
9065    /**
9066     * Returns whether this text view is a current input method target.  The
9067     * default implementation just checks with {@link InputMethodManager}.
9068     */
9069    public boolean isInputMethodTarget() {
9070        InputMethodManager imm = InputMethodManager.peekInstance();
9071        return imm != null && imm.isActive(this);
9072    }
9073
9074    // Selection context mode
9075    private static final int ID_SELECT_ALL = android.R.id.selectAll;
9076    private static final int ID_CUT = android.R.id.cut;
9077    private static final int ID_COPY = android.R.id.copy;
9078    private static final int ID_PASTE = android.R.id.paste;
9079
9080    /**
9081     * Called when a context menu option for the text view is selected.  Currently
9082     * this will be one of {@link android.R.id#selectAll}, {@link android.R.id#cut},
9083     * {@link android.R.id#copy} or {@link android.R.id#paste}.
9084     *
9085     * @return true if the context menu item action was performed.
9086     */
9087    public boolean onTextContextMenuItem(int id) {
9088        int min = 0;
9089        int max = mText.length();
9090
9091        if (isFocused()) {
9092            final int selStart = getSelectionStart();
9093            final int selEnd = getSelectionEnd();
9094
9095            min = Math.max(0, Math.min(selStart, selEnd));
9096            max = Math.max(0, Math.max(selStart, selEnd));
9097        }
9098
9099        switch (id) {
9100            case ID_SELECT_ALL:
9101                // This does not enter text selection mode. Text is highlighted, so that it can be
9102                // bulk edited, like selectAllOnFocus does. Returns true even if text is empty.
9103                selectAll();
9104                return true;
9105
9106            case ID_PASTE:
9107                paste(min, max);
9108                return true;
9109
9110            case ID_CUT:
9111                setPrimaryClip(ClipData.newPlainText(null, getTransformedText(min, max)));
9112                deleteText_internal(min, max);
9113                stopSelectionActionMode();
9114                return true;
9115
9116            case ID_COPY:
9117                setPrimaryClip(ClipData.newPlainText(null, getTransformedText(min, max)));
9118                stopSelectionActionMode();
9119                return true;
9120        }
9121        return false;
9122    }
9123
9124    private CharSequence getTransformedText(int start, int end) {
9125        return removeSuggestionSpans(mTransformed.subSequence(start, end));
9126    }
9127
9128    /**
9129     * Prepare text so that there are not zero or two spaces at beginning and end of region defined
9130     * by [min, max] when replacing this region by paste.
9131     * Note that if there were two spaces (or more) at that position before, they are kept. We just
9132     * make sure we do not add an extra one from the paste content.
9133     */
9134    private long prepareSpacesAroundPaste(int min, int max, CharSequence paste) {
9135        if (paste.length() > 0) {
9136            if (min > 0) {
9137                final char charBefore = mTransformed.charAt(min - 1);
9138                final char charAfter = paste.charAt(0);
9139
9140                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
9141                    // Two spaces at beginning of paste: remove one
9142                    final int originalLength = mText.length();
9143                    deleteText_internal(min - 1, min);
9144                    // Due to filters, there is no guarantee that exactly one character was
9145                    // removed: count instead.
9146                    final int delta = mText.length() - originalLength;
9147                    min += delta;
9148                    max += delta;
9149                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
9150                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
9151                    // No space at beginning of paste: add one
9152                    final int originalLength = mText.length();
9153                    replaceText_internal(min, min, " ");
9154                    // Taking possible filters into account as above.
9155                    final int delta = mText.length() - originalLength;
9156                    min += delta;
9157                    max += delta;
9158                }
9159            }
9160
9161            if (max < mText.length()) {
9162                final char charBefore = paste.charAt(paste.length() - 1);
9163                final char charAfter = mTransformed.charAt(max);
9164
9165                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
9166                    // Two spaces at end of paste: remove one
9167                    deleteText_internal(max, max + 1);
9168                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
9169                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
9170                    // No space at end of paste: add one
9171                    replaceText_internal(max, max, " ");
9172                }
9173            }
9174        }
9175
9176        return packRangeInLong(min, max);
9177    }
9178
9179    private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) {
9180        TextView shadowView = (TextView) inflate(mContext,
9181                com.android.internal.R.layout.text_drag_thumbnail, null);
9182
9183        if (shadowView == null) {
9184            throw new IllegalArgumentException("Unable to inflate text drag thumbnail");
9185        }
9186
9187        if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) {
9188            text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH);
9189        }
9190        shadowView.setText(text);
9191        shadowView.setTextColor(getTextColors());
9192
9193        shadowView.setTextAppearance(mContext, R.styleable.Theme_textAppearanceLarge);
9194        shadowView.setGravity(Gravity.CENTER);
9195
9196        shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
9197                ViewGroup.LayoutParams.WRAP_CONTENT));
9198
9199        final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
9200        shadowView.measure(size, size);
9201
9202        shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight());
9203        shadowView.invalidate();
9204        return new DragShadowBuilder(shadowView);
9205    }
9206
9207    private static class DragLocalState {
9208        public TextView sourceTextView;
9209        public int start, end;
9210
9211        public DragLocalState(TextView sourceTextView, int start, int end) {
9212            this.sourceTextView = sourceTextView;
9213            this.start = start;
9214            this.end = end;
9215        }
9216    }
9217
9218    @Override
9219    public boolean performLongClick() {
9220        boolean handled = false;
9221        boolean vibrate = true;
9222
9223        if (super.performLongClick()) {
9224            mDiscardNextActionUp = true;
9225            handled = true;
9226        }
9227
9228        // Long press in empty space moves cursor and shows the Paste affordance if available.
9229        if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) &&
9230                mInsertionControllerEnabled) {
9231            final int offset = getOffsetForPosition(mLastDownPositionX, mLastDownPositionY);
9232            stopSelectionActionMode();
9233            Selection.setSelection((Spannable) mText, offset);
9234            getInsertionController().showWithActionPopup();
9235            handled = true;
9236            vibrate = false;
9237        }
9238
9239        if (!handled && mSelectionActionMode != null) {
9240            if (touchPositionIsInSelection()) {
9241                // Start a drag
9242                final int start = getSelectionStart();
9243                final int end = getSelectionEnd();
9244                CharSequence selectedText = getTransformedText(start, end);
9245                ClipData data = ClipData.newPlainText(null, selectedText);
9246                DragLocalState localState = new DragLocalState(this, start, end);
9247                startDrag(data, getTextThumbnailBuilder(selectedText), localState, 0);
9248                stopSelectionActionMode();
9249            } else {
9250                getSelectionController().hide();
9251                selectCurrentWord();
9252                getSelectionController().show();
9253            }
9254            handled = true;
9255        }
9256
9257        // Start a new selection
9258        if (!handled) {
9259            vibrate = handled = startSelectionActionMode();
9260        }
9261
9262        if (vibrate) {
9263            performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
9264        }
9265
9266        if (handled) {
9267            mDiscardNextActionUp = true;
9268        }
9269
9270        return handled;
9271    }
9272
9273    private boolean touchPositionIsInSelection() {
9274        int selectionStart = getSelectionStart();
9275        int selectionEnd = getSelectionEnd();
9276
9277        if (selectionStart == selectionEnd) {
9278            return false;
9279        }
9280
9281        if (selectionStart > selectionEnd) {
9282            int tmp = selectionStart;
9283            selectionStart = selectionEnd;
9284            selectionEnd = tmp;
9285            Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
9286        }
9287
9288        SelectionModifierCursorController selectionController = getSelectionController();
9289        int minOffset = selectionController.getMinTouchOffset();
9290        int maxOffset = selectionController.getMaxTouchOffset();
9291
9292        return ((minOffset >= selectionStart) && (maxOffset < selectionEnd));
9293    }
9294
9295    private PositionListener getPositionListener() {
9296        if (mPositionListener == null) {
9297            mPositionListener = new PositionListener();
9298        }
9299        return mPositionListener;
9300    }
9301
9302    private interface TextViewPositionListener {
9303        public void updatePosition(int parentPositionX, int parentPositionY,
9304                boolean parentPositionChanged, boolean parentScrolled);
9305    }
9306
9307    private class PositionListener implements ViewTreeObserver.OnPreDrawListener {
9308        // 3 handles
9309        // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others)
9310        private final int MAXIMUM_NUMBER_OF_LISTENERS = 6;
9311        private TextViewPositionListener[] mPositionListeners =
9312                new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS];
9313        private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS];
9314        private boolean mPositionHasChanged = true;
9315        // Absolute position of the TextView with respect to its parent window
9316        private int mPositionX, mPositionY;
9317        private int mNumberOfListeners;
9318        private boolean mScrollHasChanged;
9319
9320        public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) {
9321            if (mNumberOfListeners == 0) {
9322                updatePosition();
9323                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
9324                vto.addOnPreDrawListener(this);
9325            }
9326
9327            int emptySlotIndex = -1;
9328            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
9329                TextViewPositionListener listener = mPositionListeners[i];
9330                if (listener == positionListener) {
9331                    return;
9332                } else if (emptySlotIndex < 0 && listener == null) {
9333                    emptySlotIndex = i;
9334                }
9335            }
9336
9337            mPositionListeners[emptySlotIndex] = positionListener;
9338            mCanMove[emptySlotIndex] = canMove;
9339            mNumberOfListeners++;
9340        }
9341
9342        public void removeSubscriber(TextViewPositionListener positionListener) {
9343            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
9344                if (mPositionListeners[i] == positionListener) {
9345                    mPositionListeners[i] = null;
9346                    mNumberOfListeners--;
9347                    break;
9348                }
9349            }
9350
9351            if (mNumberOfListeners == 0) {
9352                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
9353                vto.removeOnPreDrawListener(this);
9354            }
9355        }
9356
9357        public int getPositionX() {
9358            return mPositionX;
9359        }
9360
9361        public int getPositionY() {
9362            return mPositionY;
9363        }
9364
9365        @Override
9366        public boolean onPreDraw() {
9367            updatePosition();
9368
9369            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
9370                if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) {
9371                    TextViewPositionListener positionListener = mPositionListeners[i];
9372                    if (positionListener != null) {
9373                        positionListener.updatePosition(mPositionX, mPositionY,
9374                                mPositionHasChanged, mScrollHasChanged);
9375                    }
9376                }
9377            }
9378
9379            mScrollHasChanged = false;
9380            return true;
9381        }
9382
9383        private void updatePosition() {
9384            TextView.this.getLocationInWindow(mTempCoords);
9385
9386            mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY;
9387
9388            mPositionX = mTempCoords[0];
9389            mPositionY = mTempCoords[1];
9390        }
9391
9392        public void onScrollChanged() {
9393            mScrollHasChanged = true;
9394        }
9395    }
9396
9397    private boolean isPositionVisible(int positionX, int positionY) {
9398        synchronized (sTmpPosition) {
9399            final float[] position = sTmpPosition;
9400            position[0] = positionX;
9401            position[1] = positionY;
9402            View view = this;
9403
9404            while (view != null) {
9405                if (view != this) {
9406                    // Local scroll is already taken into account in positionX/Y
9407                    position[0] -= view.getScrollX();
9408                    position[1] -= view.getScrollY();
9409                }
9410
9411                if (position[0] < 0 || position[1] < 0 ||
9412                        position[0] > view.getWidth() || position[1] > view.getHeight()) {
9413                    return false;
9414                }
9415
9416                if (!view.getMatrix().isIdentity()) {
9417                    view.getMatrix().mapPoints(position);
9418                }
9419
9420                position[0] += view.getLeft();
9421                position[1] += view.getTop();
9422
9423                final ViewParent parent = view.getParent();
9424                if (parent instanceof View) {
9425                    view = (View) parent;
9426                } else {
9427                    // We've reached the ViewRoot, stop iterating
9428                    view = null;
9429                }
9430            }
9431        }
9432
9433        // We've been able to walk up the view hierarchy and the position was never clipped
9434        return true;
9435    }
9436
9437    private boolean isOffsetVisible(int offset) {
9438        final int line = mLayout.getLineForOffset(offset);
9439        final int lineBottom = mLayout.getLineBottom(line);
9440        final int primaryHorizontal = (int) mLayout.getPrimaryHorizontal(offset);
9441        return isPositionVisible(primaryHorizontal + viewportToContentHorizontalOffset(),
9442                lineBottom + viewportToContentVerticalOffset());
9443    }
9444
9445    @Override
9446    protected void onScrollChanged(int horiz, int vert, int oldHoriz, int oldVert) {
9447        super.onScrollChanged(horiz, vert, oldHoriz, oldVert);
9448        if (mPositionListener != null) {
9449            mPositionListener.onScrollChanged();
9450        }
9451    }
9452
9453    private abstract class PinnedPopupWindow implements TextViewPositionListener {
9454        protected PopupWindow mPopupWindow;
9455        protected ViewGroup mContentView;
9456        int mPositionX, mPositionY;
9457
9458        protected abstract void createPopupWindow();
9459        protected abstract void initContentView();
9460        protected abstract int getTextOffset();
9461        protected abstract int getVerticalLocalPosition(int line);
9462        protected abstract int clipVertically(int positionY);
9463
9464        public PinnedPopupWindow() {
9465            createPopupWindow();
9466
9467            mPopupWindow.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
9468            mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
9469            mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
9470
9471            initContentView();
9472
9473            LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
9474                    ViewGroup.LayoutParams.WRAP_CONTENT);
9475            mContentView.setLayoutParams(wrapContent);
9476
9477            mPopupWindow.setContentView(mContentView);
9478        }
9479
9480        public void show() {
9481            TextView.this.getPositionListener().addSubscriber(this, false /* offset is fixed */);
9482
9483            computeLocalPosition();
9484
9485            final PositionListener positionListener = TextView.this.getPositionListener();
9486            updatePosition(positionListener.getPositionX(), positionListener.getPositionY());
9487        }
9488
9489        protected void measureContent() {
9490            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9491            mContentView.measure(
9492                    View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels,
9493                            View.MeasureSpec.AT_MOST),
9494                    View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels,
9495                            View.MeasureSpec.AT_MOST));
9496        }
9497
9498        /* The popup window will be horizontally centered on the getTextOffset() and vertically
9499         * positioned according to viewportToContentHorizontalOffset.
9500         *
9501         * This method assumes that mContentView has properly been measured from its content. */
9502        private void computeLocalPosition() {
9503            measureContent();
9504            final int width = mContentView.getMeasuredWidth();
9505            final int offset = getTextOffset();
9506            mPositionX = (int) (mLayout.getPrimaryHorizontal(offset) - width / 2.0f);
9507            mPositionX += viewportToContentHorizontalOffset();
9508
9509            final int line = mLayout.getLineForOffset(offset);
9510            mPositionY = getVerticalLocalPosition(line);
9511            mPositionY += viewportToContentVerticalOffset();
9512        }
9513
9514        private void updatePosition(int parentPositionX, int parentPositionY) {
9515            int positionX = parentPositionX + mPositionX;
9516            int positionY = parentPositionY + mPositionY;
9517
9518            positionY = clipVertically(positionY);
9519
9520            // Horizontal clipping
9521            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9522            final int width = mContentView.getMeasuredWidth();
9523            positionX = Math.min(displayMetrics.widthPixels - width, positionX);
9524            positionX = Math.max(0, positionX);
9525
9526            if (isShowing()) {
9527                mPopupWindow.update(positionX, positionY, -1, -1);
9528            } else {
9529                mPopupWindow.showAtLocation(TextView.this, Gravity.NO_GRAVITY,
9530                        positionX, positionY);
9531            }
9532        }
9533
9534        public void hide() {
9535            mPopupWindow.dismiss();
9536            TextView.this.getPositionListener().removeSubscriber(this);
9537        }
9538
9539        @Override
9540        public void updatePosition(int parentPositionX, int parentPositionY,
9541                boolean parentPositionChanged, boolean parentScrolled) {
9542            // Either parentPositionChanged or parentScrolled is true, check if still visible
9543            if (isShowing() && isOffsetVisible(getTextOffset())) {
9544                if (parentScrolled) computeLocalPosition();
9545                updatePosition(parentPositionX, parentPositionY);
9546            } else {
9547                hide();
9548            }
9549        }
9550
9551        public boolean isShowing() {
9552            return mPopupWindow.isShowing();
9553        }
9554    }
9555
9556    private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener {
9557        private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE;
9558        private static final int ADD_TO_DICTIONARY = -1;
9559        private static final int DELETE_TEXT = -2;
9560        private SuggestionInfo[] mSuggestionInfos;
9561        private int mNumberOfSuggestions;
9562        private boolean mCursorWasVisibleBeforeSuggestions;
9563        private boolean mIsShowingUp = false;
9564        private SuggestionAdapter mSuggestionsAdapter;
9565        private final Comparator<SuggestionSpan> mSuggestionSpanComparator;
9566        private final HashMap<SuggestionSpan, Integer> mSpansLengths;
9567
9568        private class CustomPopupWindow extends PopupWindow {
9569            public CustomPopupWindow(Context context, int defStyle) {
9570                super(context, null, defStyle);
9571            }
9572
9573            @Override
9574            public void dismiss() {
9575                super.dismiss();
9576
9577                TextView.this.getPositionListener().removeSubscriber(SuggestionsPopupWindow.this);
9578
9579                // Safe cast since show() checks that mText is an Editable
9580                ((Spannable) mText).removeSpan(mSuggestionRangeSpan);
9581
9582                setCursorVisible(mCursorWasVisibleBeforeSuggestions);
9583                if (hasInsertionController()) {
9584                    getInsertionController().show();
9585                }
9586            }
9587        }
9588
9589        public SuggestionsPopupWindow() {
9590            mCursorWasVisibleBeforeSuggestions = mCursorVisible;
9591            mSuggestionSpanComparator = new SuggestionSpanComparator();
9592            mSpansLengths = new HashMap<SuggestionSpan, Integer>();
9593        }
9594
9595        @Override
9596        protected void createPopupWindow() {
9597            mPopupWindow = new CustomPopupWindow(TextView.this.mContext,
9598                com.android.internal.R.attr.textSuggestionsWindowStyle);
9599            mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
9600            mPopupWindow.setFocusable(true);
9601            mPopupWindow.setClippingEnabled(false);
9602        }
9603
9604        @Override
9605        protected void initContentView() {
9606            ListView listView = new ListView(TextView.this.getContext());
9607            mSuggestionsAdapter = new SuggestionAdapter();
9608            listView.setAdapter(mSuggestionsAdapter);
9609            listView.setOnItemClickListener(this);
9610            mContentView = listView;
9611
9612            // Inflate the suggestion items once and for all. + 2 for add to dictionary and delete
9613            mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS + 2];
9614            for (int i = 0; i < mSuggestionInfos.length; i++) {
9615                mSuggestionInfos[i] = new SuggestionInfo();
9616            }
9617        }
9618
9619        public boolean isShowingUp() {
9620            return mIsShowingUp;
9621        }
9622
9623        public void onParentLostFocus() {
9624            mIsShowingUp = false;
9625        }
9626
9627        private class SuggestionInfo {
9628            int suggestionStart, suggestionEnd; // range of actual suggestion within text
9629            SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents
9630            int suggestionIndex; // the index of this suggestion inside suggestionSpan
9631            SpannableStringBuilder text = new SpannableStringBuilder();
9632            TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mContext,
9633                    android.R.style.TextAppearance_SuggestionHighlight);
9634        }
9635
9636        private class SuggestionAdapter extends BaseAdapter {
9637            private LayoutInflater mInflater = (LayoutInflater) TextView.this.mContext.
9638                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
9639
9640            @Override
9641            public int getCount() {
9642                return mNumberOfSuggestions;
9643            }
9644
9645            @Override
9646            public Object getItem(int position) {
9647                return mSuggestionInfos[position];
9648            }
9649
9650            @Override
9651            public long getItemId(int position) {
9652                return position;
9653            }
9654
9655            @Override
9656            public View getView(int position, View convertView, ViewGroup parent) {
9657                TextView textView = (TextView) convertView;
9658
9659                if (textView == null) {
9660                    textView = (TextView) mInflater.inflate(mTextEditSuggestionItemLayout, parent,
9661                            false);
9662                }
9663
9664                final SuggestionInfo suggestionInfo = mSuggestionInfos[position];
9665                textView.setText(suggestionInfo.text);
9666
9667                if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) {
9668                    textView.setCompoundDrawablesWithIntrinsicBounds(
9669                            com.android.internal.R.drawable.ic_suggestions_add, 0, 0, 0);
9670                } else if (suggestionInfo.suggestionIndex == DELETE_TEXT) {
9671                    textView.setCompoundDrawablesWithIntrinsicBounds(
9672                            com.android.internal.R.drawable.ic_suggestions_delete, 0, 0, 0);
9673                } else {
9674                    textView.setCompoundDrawables(null, null, null, null);
9675                }
9676
9677                return textView;
9678            }
9679        }
9680
9681        private class SuggestionSpanComparator implements Comparator<SuggestionSpan> {
9682            public int compare(SuggestionSpan span1, SuggestionSpan span2) {
9683                final int flag1 = span1.getFlags();
9684                final int flag2 = span2.getFlags();
9685                if (flag1 != flag2) {
9686                    // The order here should match what is used in updateDrawState
9687                    final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0;
9688                    final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0;
9689                    final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0;
9690                    final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0;
9691                    if (easy1 && !misspelled1) return -1;
9692                    if (easy2 && !misspelled2) return 1;
9693                    if (misspelled1) return -1;
9694                    if (misspelled2) return 1;
9695                }
9696
9697                return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue();
9698            }
9699        }
9700
9701        /**
9702         * Returns the suggestion spans that cover the current cursor position. The suggestion
9703         * spans are sorted according to the length of text that they are attached to.
9704         */
9705        private SuggestionSpan[] getSuggestionSpans() {
9706            int pos = TextView.this.getSelectionStart();
9707            Spannable spannable = (Spannable) TextView.this.mText;
9708            SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class);
9709
9710            mSpansLengths.clear();
9711            for (SuggestionSpan suggestionSpan : suggestionSpans) {
9712                int start = spannable.getSpanStart(suggestionSpan);
9713                int end = spannable.getSpanEnd(suggestionSpan);
9714                mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start));
9715            }
9716
9717            // The suggestions are sorted according to their types (easy correction first, then
9718            // misspelled) and to the length of the text that they cover (shorter first).
9719            Arrays.sort(suggestionSpans, mSuggestionSpanComparator);
9720            return suggestionSpans;
9721        }
9722
9723        @Override
9724        public void show() {
9725            if (!(mText instanceof Editable)) return;
9726
9727            updateSuggestions();
9728            mCursorWasVisibleBeforeSuggestions = mCursorVisible;
9729            setCursorVisible(false);
9730            mIsShowingUp = true;
9731            super.show();
9732        }
9733
9734        @Override
9735        protected void measureContent() {
9736            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9737            final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec(
9738                    displayMetrics.widthPixels, View.MeasureSpec.AT_MOST);
9739            final int verticalMeasure = View.MeasureSpec.makeMeasureSpec(
9740                    displayMetrics.heightPixels, View.MeasureSpec.AT_MOST);
9741
9742            int width = 0;
9743            View view = null;
9744            for (int i = 0; i < mNumberOfSuggestions; i++) {
9745                view = mSuggestionsAdapter.getView(i, view, mContentView);
9746                view.getLayoutParams().width = LayoutParams.WRAP_CONTENT;
9747                view.measure(horizontalMeasure, verticalMeasure);
9748                width = Math.max(width, view.getMeasuredWidth());
9749            }
9750
9751            // Enforce the width based on actual text widths
9752            mContentView.measure(
9753                    View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY),
9754                    verticalMeasure);
9755
9756            Drawable popupBackground = mPopupWindow.getBackground();
9757            if (popupBackground != null) {
9758                if (mTempRect == null) mTempRect = new Rect();
9759                popupBackground.getPadding(mTempRect);
9760                width += mTempRect.left + mTempRect.right;
9761            }
9762            mPopupWindow.setWidth(width);
9763        }
9764
9765        @Override
9766        protected int getTextOffset() {
9767            return getSelectionStart();
9768        }
9769
9770        @Override
9771        protected int getVerticalLocalPosition(int line) {
9772            return mLayout.getLineBottom(line);
9773        }
9774
9775        @Override
9776        protected int clipVertically(int positionY) {
9777            final int height = mContentView.getMeasuredHeight();
9778            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9779            return Math.min(positionY, displayMetrics.heightPixels - height);
9780        }
9781
9782        @Override
9783        public void hide() {
9784            super.hide();
9785        }
9786
9787        private void updateSuggestions() {
9788            Spannable spannable = (Spannable) TextView.this.mText;
9789            SuggestionSpan[] suggestionSpans = getSuggestionSpans();
9790
9791            final int nbSpans = suggestionSpans.length;
9792
9793            mNumberOfSuggestions = 0;
9794            int spanUnionStart = mText.length();
9795            int spanUnionEnd = 0;
9796
9797            SuggestionSpan misspelledSpan = null;
9798            int underlineColor = 0;
9799
9800            for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) {
9801                SuggestionSpan suggestionSpan = suggestionSpans[spanIndex];
9802                final int spanStart = spannable.getSpanStart(suggestionSpan);
9803                final int spanEnd = spannable.getSpanEnd(suggestionSpan);
9804                spanUnionStart = Math.min(spanStart, spanUnionStart);
9805                spanUnionEnd = Math.max(spanEnd, spanUnionEnd);
9806
9807                if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) {
9808                    misspelledSpan = suggestionSpan;
9809                }
9810
9811                // The first span dictates the background color of the highlighted text
9812                if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor();
9813
9814                String[] suggestions = suggestionSpan.getSuggestions();
9815                int nbSuggestions = suggestions.length;
9816                for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) {
9817                    SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions];
9818                    suggestionInfo.suggestionSpan = suggestionSpan;
9819                    suggestionInfo.suggestionIndex = suggestionIndex;
9820                    suggestionInfo.text.replace(0, suggestionInfo.text.length(),
9821                            suggestions[suggestionIndex]);
9822
9823                    mNumberOfSuggestions++;
9824                    if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) {
9825                        // Also end outer for loop
9826                        spanIndex = nbSpans;
9827                        break;
9828                    }
9829                }
9830            }
9831
9832            for (int i = 0; i < mNumberOfSuggestions; i++) {
9833                highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd);
9834            }
9835
9836            // Add to dictionary item if there is a span with the misspelled flag
9837            if (misspelledSpan != null) {
9838                final int misspelledStart = spannable.getSpanStart(misspelledSpan);
9839                final int misspelledEnd = spannable.getSpanEnd(misspelledSpan);
9840                if (misspelledStart >= 0 && misspelledEnd > misspelledStart) {
9841                    SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions];
9842                    suggestionInfo.suggestionSpan = misspelledSpan;
9843                    suggestionInfo.suggestionIndex = ADD_TO_DICTIONARY;
9844                    suggestionInfo.text.replace(0, suggestionInfo.text.length(),
9845                            getContext().getString(com.android.internal.R.string.addToDictionary));
9846                    suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0,
9847                            Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9848
9849                    mNumberOfSuggestions++;
9850                }
9851            }
9852
9853            // Delete item
9854            SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions];
9855            suggestionInfo.suggestionSpan = null;
9856            suggestionInfo.suggestionIndex = DELETE_TEXT;
9857            suggestionInfo.text.replace(0, suggestionInfo.text.length(),
9858                    getContext().getString(com.android.internal.R.string.deleteText));
9859            suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0,
9860                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9861            mNumberOfSuggestions++;
9862
9863            if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan();
9864            if (underlineColor == 0) {
9865                // Fallback on the default highlight color when the first span does not provide one
9866                mSuggestionRangeSpan.setBackgroundColor(mHighlightColor);
9867            } else {
9868                final float BACKGROUND_TRANSPARENCY = 0.4f;
9869                final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY);
9870                mSuggestionRangeSpan.setBackgroundColor(
9871                        (underlineColor & 0x00FFFFFF) + (newAlpha << 24));
9872            }
9873            spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd,
9874                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9875
9876            mSuggestionsAdapter.notifyDataSetChanged();
9877        }
9878
9879        private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart,
9880                int unionEnd) {
9881            final Spannable text = (Spannable) mText;
9882            final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan);
9883            final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan);
9884
9885            // Adjust the start/end of the suggestion span
9886            suggestionInfo.suggestionStart = spanStart - unionStart;
9887            suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart
9888                    + suggestionInfo.text.length();
9889
9890            suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0,
9891                    suggestionInfo.text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9892
9893            // Add the text before and after the span.
9894            suggestionInfo.text.insert(0, mText.toString().substring(unionStart, spanStart));
9895            suggestionInfo.text.append(mText.toString().substring(spanEnd, unionEnd));
9896        }
9897
9898        @Override
9899        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
9900            Editable editable = (Editable) mText;
9901            SuggestionInfo suggestionInfo = mSuggestionInfos[position];
9902
9903            if (suggestionInfo.suggestionIndex == DELETE_TEXT) {
9904                final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan);
9905                int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan);
9906                if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) {
9907                    // Do not leave two adjacent spaces after deletion, or one at beginning of text
9908                    if (spanUnionEnd < editable.length() &&
9909                            Character.isSpaceChar(editable.charAt(spanUnionEnd)) &&
9910                            (spanUnionStart == 0 ||
9911                            Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) {
9912                        spanUnionEnd = spanUnionEnd + 1;
9913                    }
9914                    deleteText_internal(spanUnionStart, spanUnionEnd);
9915                }
9916                hide();
9917                return;
9918            }
9919
9920            final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan);
9921            final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan);
9922            if (spanStart < 0 || spanEnd <= spanStart) {
9923                // Span has been removed
9924                hide();
9925                return;
9926            }
9927            final String originalText = mText.toString().substring(spanStart, spanEnd);
9928
9929            if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) {
9930                Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT);
9931                intent.putExtra("word", originalText);
9932                intent.putExtra("locale", getTextServicesLocale().toString());
9933                intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK);
9934                getContext().startActivity(intent);
9935                // There is no way to know if the word was indeed added. Re-check.
9936                // TODO The ExtractEditText should remove the span in the original text instead
9937                editable.removeSpan(suggestionInfo.suggestionSpan);
9938                updateSpellCheckSpans(spanStart, spanEnd, false);
9939            } else {
9940                // SuggestionSpans are removed by replace: save them before
9941                SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd,
9942                        SuggestionSpan.class);
9943                final int length = suggestionSpans.length;
9944                int[] suggestionSpansStarts = new int[length];
9945                int[] suggestionSpansEnds = new int[length];
9946                int[] suggestionSpansFlags = new int[length];
9947                for (int i = 0; i < length; i++) {
9948                    final SuggestionSpan suggestionSpan = suggestionSpans[i];
9949                    suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan);
9950                    suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan);
9951                    suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan);
9952
9953                    // Remove potential misspelled flags
9954                    int suggestionSpanFlags = suggestionSpan.getFlags();
9955                    if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) {
9956                        suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED;
9957                        suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT;
9958                        suggestionSpan.setFlags(suggestionSpanFlags);
9959                    }
9960                }
9961
9962                final int suggestionStart = suggestionInfo.suggestionStart;
9963                final int suggestionEnd = suggestionInfo.suggestionEnd;
9964                final String suggestion = suggestionInfo.text.subSequence(
9965                        suggestionStart, suggestionEnd).toString();
9966                replaceText_internal(spanStart, spanEnd, suggestion);
9967
9968                // Notify source IME of the suggestion pick. Do this before swaping texts.
9969                if (!TextUtils.isEmpty(
9970                        suggestionInfo.suggestionSpan.getNotificationTargetClassName())) {
9971                    InputMethodManager imm = InputMethodManager.peekInstance();
9972                    if (imm != null) {
9973                        imm.notifySuggestionPicked(suggestionInfo.suggestionSpan, originalText,
9974                                suggestionInfo.suggestionIndex);
9975                    }
9976                }
9977
9978                // Swap text content between actual text and Suggestion span
9979                String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions();
9980                suggestions[suggestionInfo.suggestionIndex] = originalText;
9981
9982                // Restore previous SuggestionSpans
9983                final int lengthDifference = suggestion.length() - (spanEnd - spanStart);
9984                for (int i = 0; i < length; i++) {
9985                    // Only spans that include the modified region make sense after replacement
9986                    // Spans partially included in the replaced region are removed, there is no
9987                    // way to assign them a valid range after replacement
9988                    if (suggestionSpansStarts[i] <= spanStart &&
9989                            suggestionSpansEnds[i] >= spanEnd) {
9990                        setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i],
9991                                suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]);
9992                    }
9993                }
9994
9995                // Move cursor at the end of the replaced word
9996                final int newCursorPosition = spanEnd + lengthDifference;
9997                setCursorPosition_internal(newCursorPosition, newCursorPosition);
9998            }
9999
10000            hide();
10001        }
10002    }
10003
10004    /**
10005     * Removes the suggestion spans.
10006     */
10007    CharSequence removeSuggestionSpans(CharSequence text) {
10008       if (text instanceof Spanned) {
10009           Spannable spannable;
10010           if (text instanceof Spannable) {
10011               spannable = (Spannable) text;
10012           } else {
10013               spannable = new SpannableString(text);
10014               text = spannable;
10015           }
10016
10017           SuggestionSpan[] spans = spannable.getSpans(0, text.length(), SuggestionSpan.class);
10018           for (int i = 0; i < spans.length; i++) {
10019               spannable.removeSpan(spans[i]);
10020           }
10021       }
10022       return text;
10023    }
10024
10025    void showSuggestions() {
10026        if (mSuggestionsPopupWindow == null) {
10027            mSuggestionsPopupWindow = new SuggestionsPopupWindow();
10028        }
10029        hideControllers();
10030        mSuggestionsPopupWindow.show();
10031    }
10032
10033    boolean areSuggestionsShown() {
10034        return mSuggestionsPopupWindow != null && mSuggestionsPopupWindow.isShowing();
10035    }
10036
10037    /**
10038     * Return whether or not suggestions are enabled on this TextView. The suggestions are generated
10039     * by the IME or by the spell checker as the user types. This is done by adding
10040     * {@link SuggestionSpan}s to the text.
10041     *
10042     * When suggestions are enabled (default), this list of suggestions will be displayed when the
10043     * user asks for them on these parts of the text. This value depends on the inputType of this
10044     * TextView.
10045     *
10046     * The class of the input type must be {@link InputType#TYPE_CLASS_TEXT}.
10047     *
10048     * In addition, the type variation must be one of
10049     * {@link InputType#TYPE_TEXT_VARIATION_NORMAL},
10050     * {@link InputType#TYPE_TEXT_VARIATION_EMAIL_SUBJECT},
10051     * {@link InputType#TYPE_TEXT_VARIATION_LONG_MESSAGE},
10052     * {@link InputType#TYPE_TEXT_VARIATION_SHORT_MESSAGE} or
10053     * {@link InputType#TYPE_TEXT_VARIATION_WEB_EDIT_TEXT}.
10054     *
10055     * And finally, the {@link InputType#TYPE_TEXT_FLAG_NO_SUGGESTIONS} flag must <i>not</i> be set.
10056     *
10057     * @return true if the suggestions popup window is enabled, based on the inputType.
10058     */
10059    public boolean isSuggestionsEnabled() {
10060        if ((mInputType & InputType.TYPE_MASK_CLASS) != InputType.TYPE_CLASS_TEXT) return false;
10061        if ((mInputType & InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS) > 0) return false;
10062
10063        final int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
10064        return (variation == EditorInfo.TYPE_TEXT_VARIATION_NORMAL ||
10065                variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT ||
10066                variation == EditorInfo.TYPE_TEXT_VARIATION_LONG_MESSAGE ||
10067                variation == EditorInfo.TYPE_TEXT_VARIATION_SHORT_MESSAGE ||
10068                variation == EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT);
10069    }
10070
10071    /**
10072     * If provided, this ActionMode.Callback will be used to create the ActionMode when text
10073     * selection is initiated in this View.
10074     *
10075     * The standard implementation populates the menu with a subset of Select All, Cut, Copy and
10076     * Paste actions, depending on what this View supports.
10077     *
10078     * A custom implementation can add new entries in the default menu in its
10079     * {@link android.view.ActionMode.Callback#onPrepareActionMode(ActionMode, Menu)} method. The
10080     * default actions can also be removed from the menu using {@link Menu#removeItem(int)} and
10081     * passing {@link android.R.id#selectAll}, {@link android.R.id#cut}, {@link android.R.id#copy}
10082     * or {@link android.R.id#paste} ids as parameters.
10083     *
10084     * Returning false from
10085     * {@link android.view.ActionMode.Callback#onCreateActionMode(ActionMode, Menu)} will prevent
10086     * the action mode from being started.
10087     *
10088     * Action click events should be handled by the custom implementation of
10089     * {@link android.view.ActionMode.Callback#onActionItemClicked(ActionMode, MenuItem)}.
10090     *
10091     * Note that text selection mode is not started when a TextView receives focus and the
10092     * {@link android.R.attr#selectAllOnFocus} flag has been set. The content is highlighted in
10093     * that case, to allow for quick replacement.
10094     */
10095    public void setCustomSelectionActionModeCallback(ActionMode.Callback actionModeCallback) {
10096        mCustomSelectionActionModeCallback = actionModeCallback;
10097    }
10098
10099    /**
10100     * Retrieves the value set in {@link #setCustomSelectionActionModeCallback}. Default is null.
10101     *
10102     * @return The current custom selection callback.
10103     */
10104    public ActionMode.Callback getCustomSelectionActionModeCallback() {
10105        return mCustomSelectionActionModeCallback;
10106    }
10107
10108    /**
10109     *
10110     * @return true if the selection mode was actually started.
10111     */
10112    private boolean startSelectionActionMode() {
10113        if (mSelectionActionMode != null) {
10114            // Selection action mode is already started
10115            return false;
10116        }
10117
10118        if (!canSelectText() || !requestFocus()) {
10119            Log.w(LOG_TAG, "TextView does not support text selection. Action mode cancelled.");
10120            return false;
10121        }
10122
10123        if (!hasSelection()) {
10124            // There may already be a selection on device rotation
10125            if (!selectCurrentWord()) {
10126                // No word found under cursor or text selection not permitted.
10127                return false;
10128            }
10129        }
10130
10131        boolean willExtract = extractedTextModeWillBeStarted();
10132
10133        // Do not start the action mode when extracted text will show up full screen, thus
10134        // immediately hiding the newly created action bar, which would be visually distracting.
10135        if (!willExtract) {
10136            ActionMode.Callback actionModeCallback = new SelectionActionModeCallback();
10137            mSelectionActionMode = startActionMode(actionModeCallback);
10138        }
10139
10140        final boolean selectionStarted = mSelectionActionMode != null || willExtract;
10141        if (selectionStarted && !mTextIsSelectable && mSoftInputShownOnFocus) {
10142            // Show the IME to be able to replace text, except when selecting non editable text.
10143            final InputMethodManager imm = InputMethodManager.peekInstance();
10144            if (imm != null) {
10145                imm.showSoftInput(this, 0, null);
10146            }
10147        }
10148
10149        return selectionStarted;
10150    }
10151
10152    private boolean extractedTextModeWillBeStarted() {
10153        if (!(this instanceof ExtractEditText)) {
10154            final InputMethodManager imm = InputMethodManager.peekInstance();
10155            return  imm != null && imm.isFullscreenMode();
10156        }
10157        return false;
10158    }
10159
10160    private void stopSelectionActionMode() {
10161        if (mSelectionActionMode != null) {
10162            // This will hide the mSelectionModifierCursorController
10163            mSelectionActionMode.finish();
10164        }
10165    }
10166
10167    /**
10168     * Paste clipboard content between min and max positions.
10169     */
10170    private void paste(int min, int max) {
10171        ClipboardManager clipboard =
10172            (ClipboardManager) getContext().getSystemService(Context.CLIPBOARD_SERVICE);
10173        ClipData clip = clipboard.getPrimaryClip();
10174        if (clip != null) {
10175            boolean didFirst = false;
10176            for (int i=0; i<clip.getItemCount(); i++) {
10177                CharSequence paste = clip.getItemAt(i).coerceToText(getContext());
10178                if (paste != null) {
10179                    if (!didFirst) {
10180                        long minMax = prepareSpacesAroundPaste(min, max, paste);
10181                        min = extractRangeStartFromLong(minMax);
10182                        max = extractRangeEndFromLong(minMax);
10183                        Selection.setSelection((Spannable) mText, max);
10184                        ((Editable) mText).replace(min, max, paste);
10185                        didFirst = true;
10186                    } else {
10187                        ((Editable) mText).insert(getSelectionEnd(), "\n");
10188                        ((Editable) mText).insert(getSelectionEnd(), paste);
10189                    }
10190                }
10191            }
10192            stopSelectionActionMode();
10193            sLastCutOrCopyTime = 0;
10194        }
10195    }
10196
10197    private void setPrimaryClip(ClipData clip) {
10198        ClipboardManager clipboard = (ClipboardManager) getContext().
10199                getSystemService(Context.CLIPBOARD_SERVICE);
10200        clipboard.setPrimaryClip(clip);
10201        sLastCutOrCopyTime = SystemClock.uptimeMillis();
10202    }
10203
10204    /**
10205     * An ActionMode Callback class that is used to provide actions while in text selection mode.
10206     *
10207     * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending
10208     * on which of these this TextView supports.
10209     */
10210    private class SelectionActionModeCallback implements ActionMode.Callback {
10211
10212        @Override
10213        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
10214            TypedArray styledAttributes = mContext.obtainStyledAttributes(
10215                    com.android.internal.R.styleable.SelectionModeDrawables);
10216
10217            boolean allowText = getContext().getResources().getBoolean(
10218                    com.android.internal.R.bool.config_allowActionMenuItemTextWithIcon);
10219
10220            mode.setTitle(allowText ?
10221                    mContext.getString(com.android.internal.R.string.textSelectionCABTitle) : null);
10222            mode.setSubtitle(null);
10223
10224            int selectAllIconId = 0; // No icon by default
10225            if (!allowText) {
10226                // Provide an icon, text will not be displayed on smaller screens.
10227                selectAllIconId = styledAttributes.getResourceId(
10228                        R.styleable.SelectionModeDrawables_actionModeSelectAllDrawable, 0);
10229            }
10230
10231            menu.add(0, ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll).
10232                    setIcon(selectAllIconId).
10233                    setAlphabeticShortcut('a').
10234                    setShowAsAction(
10235                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10236
10237            if (canCut()) {
10238                menu.add(0, ID_CUT, 0, com.android.internal.R.string.cut).
10239                    setIcon(styledAttributes.getResourceId(
10240                            R.styleable.SelectionModeDrawables_actionModeCutDrawable, 0)).
10241                    setAlphabeticShortcut('x').
10242                    setShowAsAction(
10243                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10244            }
10245
10246            if (canCopy()) {
10247                menu.add(0, ID_COPY, 0, com.android.internal.R.string.copy).
10248                    setIcon(styledAttributes.getResourceId(
10249                            R.styleable.SelectionModeDrawables_actionModeCopyDrawable, 0)).
10250                    setAlphabeticShortcut('c').
10251                    setShowAsAction(
10252                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10253            }
10254
10255            if (canPaste()) {
10256                menu.add(0, ID_PASTE, 0, com.android.internal.R.string.paste).
10257                        setIcon(styledAttributes.getResourceId(
10258                                R.styleable.SelectionModeDrawables_actionModePasteDrawable, 0)).
10259                        setAlphabeticShortcut('v').
10260                        setShowAsAction(
10261                                MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10262            }
10263
10264            styledAttributes.recycle();
10265
10266            if (mCustomSelectionActionModeCallback != null) {
10267                if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) {
10268                    // The custom mode can choose to cancel the action mode
10269                    return false;
10270                }
10271            }
10272
10273            if (menu.hasVisibleItems() || mode.getCustomView() != null) {
10274                getSelectionController().show();
10275                return true;
10276            } else {
10277                return false;
10278            }
10279        }
10280
10281        @Override
10282        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
10283            if (mCustomSelectionActionModeCallback != null) {
10284                return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu);
10285            }
10286            return true;
10287        }
10288
10289        @Override
10290        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
10291            if (mCustomSelectionActionModeCallback != null &&
10292                 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) {
10293                return true;
10294            }
10295            return onTextContextMenuItem(item.getItemId());
10296        }
10297
10298        @Override
10299        public void onDestroyActionMode(ActionMode mode) {
10300            if (mCustomSelectionActionModeCallback != null) {
10301                mCustomSelectionActionModeCallback.onDestroyActionMode(mode);
10302            }
10303            Selection.setSelection((Spannable) mText, getSelectionEnd());
10304
10305            if (mSelectionModifierCursorController != null) {
10306                mSelectionModifierCursorController.hide();
10307            }
10308
10309            mSelectionActionMode = null;
10310        }
10311    }
10312
10313    private class ActionPopupWindow extends PinnedPopupWindow implements OnClickListener {
10314        private static final int POPUP_TEXT_LAYOUT =
10315                com.android.internal.R.layout.text_edit_action_popup_text;
10316        private TextView mPasteTextView;
10317        private TextView mReplaceTextView;
10318
10319        @Override
10320        protected void createPopupWindow() {
10321            mPopupWindow = new PopupWindow(TextView.this.mContext, null,
10322                    com.android.internal.R.attr.textSelectHandleWindowStyle);
10323            mPopupWindow.setClippingEnabled(true);
10324        }
10325
10326        @Override
10327        protected void initContentView() {
10328            LinearLayout linearLayout = new LinearLayout(TextView.this.getContext());
10329            linearLayout.setOrientation(LinearLayout.HORIZONTAL);
10330            mContentView = linearLayout;
10331            mContentView.setBackgroundResource(
10332                    com.android.internal.R.drawable.text_edit_paste_window);
10333
10334            LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
10335                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
10336
10337            LayoutParams wrapContent = new LayoutParams(
10338                    ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
10339
10340            mPasteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
10341            mPasteTextView.setLayoutParams(wrapContent);
10342            mContentView.addView(mPasteTextView);
10343            mPasteTextView.setText(com.android.internal.R.string.paste);
10344            mPasteTextView.setOnClickListener(this);
10345
10346            mReplaceTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
10347            mReplaceTextView.setLayoutParams(wrapContent);
10348            mContentView.addView(mReplaceTextView);
10349            mReplaceTextView.setText(com.android.internal.R.string.replace);
10350            mReplaceTextView.setOnClickListener(this);
10351        }
10352
10353        @Override
10354        public void show() {
10355            boolean canPaste = canPaste();
10356            boolean canSuggest = isSuggestionsEnabled() && isCursorInsideSuggestionSpan();
10357            mPasteTextView.setVisibility(canPaste ? View.VISIBLE : View.GONE);
10358            mReplaceTextView.setVisibility(canSuggest ? View.VISIBLE : View.GONE);
10359
10360            if (!canPaste && !canSuggest) return;
10361
10362            super.show();
10363        }
10364
10365        @Override
10366        public void onClick(View view) {
10367            if (view == mPasteTextView && canPaste()) {
10368                onTextContextMenuItem(ID_PASTE);
10369                hide();
10370            } else if (view == mReplaceTextView) {
10371                final int middle = (getSelectionStart() + getSelectionEnd()) / 2;
10372                stopSelectionActionMode();
10373                Selection.setSelection((Spannable) mText, middle);
10374                showSuggestions();
10375            }
10376        }
10377
10378        @Override
10379        protected int getTextOffset() {
10380            return (getSelectionStart() + getSelectionEnd()) / 2;
10381        }
10382
10383        @Override
10384        protected int getVerticalLocalPosition(int line) {
10385            return mLayout.getLineTop(line) - mContentView.getMeasuredHeight();
10386        }
10387
10388        @Override
10389        protected int clipVertically(int positionY) {
10390            if (positionY < 0) {
10391                final int offset = getTextOffset();
10392                final int line = mLayout.getLineForOffset(offset);
10393                positionY += mLayout.getLineBottom(line) - mLayout.getLineTop(line);
10394                positionY += mContentView.getMeasuredHeight();
10395
10396                // Assumes insertion and selection handles share the same height
10397                final Drawable handle = mContext.getResources().getDrawable(mTextSelectHandleRes);
10398                positionY += handle.getIntrinsicHeight();
10399            }
10400
10401            return positionY;
10402        }
10403    }
10404
10405    private abstract class HandleView extends View implements TextViewPositionListener {
10406        protected Drawable mDrawable;
10407        protected Drawable mDrawableLtr;
10408        protected Drawable mDrawableRtl;
10409        private final PopupWindow mContainer;
10410        // Position with respect to the parent TextView
10411        private int mPositionX, mPositionY;
10412        private boolean mIsDragging;
10413        // Offset from touch position to mPosition
10414        private float mTouchToWindowOffsetX, mTouchToWindowOffsetY;
10415        protected int mHotspotX;
10416        // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up
10417        private float mTouchOffsetY;
10418        // Where the touch position should be on the handle to ensure a maximum cursor visibility
10419        private float mIdealVerticalOffset;
10420        // Parent's (TextView) previous position in window
10421        private int mLastParentX, mLastParentY;
10422        // Transient action popup window for Paste and Replace actions
10423        protected ActionPopupWindow mActionPopupWindow;
10424        // Previous text character offset
10425        private int mPreviousOffset = -1;
10426        // Previous text character offset
10427        private boolean mPositionHasChanged = true;
10428        // Used to delay the appearance of the action popup window
10429        private Runnable mActionPopupShower;
10430
10431        public HandleView(Drawable drawableLtr, Drawable drawableRtl) {
10432            super(TextView.this.mContext);
10433            mContainer = new PopupWindow(TextView.this.mContext, null,
10434                    com.android.internal.R.attr.textSelectHandleWindowStyle);
10435            mContainer.setSplitTouchEnabled(true);
10436            mContainer.setClippingEnabled(false);
10437            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
10438            mContainer.setContentView(this);
10439
10440            mDrawableLtr = drawableLtr;
10441            mDrawableRtl = drawableRtl;
10442
10443            updateDrawable();
10444
10445            final int handleHeight = mDrawable.getIntrinsicHeight();
10446            mTouchOffsetY = -0.3f * handleHeight;
10447            mIdealVerticalOffset = 0.7f * handleHeight;
10448        }
10449
10450        protected void updateDrawable() {
10451            final int offset = getCurrentCursorOffset();
10452            final boolean isRtlCharAtOffset = mLayout.isRtlCharAt(offset);
10453            mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr;
10454            mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset);
10455        }
10456
10457        protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun);
10458
10459        // Touch-up filter: number of previous positions remembered
10460        private static final int HISTORY_SIZE = 5;
10461        private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150;
10462        private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350;
10463        private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE];
10464        private final int[] mPreviousOffsets = new int[HISTORY_SIZE];
10465        private int mPreviousOffsetIndex = 0;
10466        private int mNumberPreviousOffsets = 0;
10467
10468        private void startTouchUpFilter(int offset) {
10469            mNumberPreviousOffsets = 0;
10470            addPositionToTouchUpFilter(offset);
10471        }
10472
10473        private void addPositionToTouchUpFilter(int offset) {
10474            mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE;
10475            mPreviousOffsets[mPreviousOffsetIndex] = offset;
10476            mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis();
10477            mNumberPreviousOffsets++;
10478        }
10479
10480        private void filterOnTouchUp() {
10481            final long now = SystemClock.uptimeMillis();
10482            int i = 0;
10483            int index = mPreviousOffsetIndex;
10484            final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE);
10485            while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) {
10486                i++;
10487                index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE;
10488            }
10489
10490            if (i > 0 && i < iMax &&
10491                    (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) {
10492                positionAtCursorOffset(mPreviousOffsets[index], false);
10493            }
10494        }
10495
10496        public boolean offsetHasBeenChanged() {
10497            return mNumberPreviousOffsets > 1;
10498        }
10499
10500        @Override
10501        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
10502            setMeasuredDimension(mDrawable.getIntrinsicWidth(), mDrawable.getIntrinsicHeight());
10503        }
10504
10505        public void show() {
10506            if (isShowing()) return;
10507
10508            getPositionListener().addSubscriber(this, true /* local position may change */);
10509
10510            // Make sure the offset is always considered new, even when focusing at same position
10511            mPreviousOffset = -1;
10512            positionAtCursorOffset(getCurrentCursorOffset(), false);
10513
10514            hideActionPopupWindow();
10515        }
10516
10517        protected void dismiss() {
10518            mIsDragging = false;
10519            mContainer.dismiss();
10520            onDetached();
10521        }
10522
10523        public void hide() {
10524            dismiss();
10525
10526            TextView.this.getPositionListener().removeSubscriber(this);
10527        }
10528
10529        void showActionPopupWindow(int delay) {
10530            if (mActionPopupWindow == null) {
10531                mActionPopupWindow = new ActionPopupWindow();
10532            }
10533            if (mActionPopupShower == null) {
10534                mActionPopupShower = new Runnable() {
10535                    public void run() {
10536                        mActionPopupWindow.show();
10537                    }
10538                };
10539            } else {
10540                TextView.this.removeCallbacks(mActionPopupShower);
10541            }
10542            TextView.this.postDelayed(mActionPopupShower, delay);
10543        }
10544
10545        protected void hideActionPopupWindow() {
10546            if (mActionPopupShower != null) {
10547                TextView.this.removeCallbacks(mActionPopupShower);
10548            }
10549            if (mActionPopupWindow != null) {
10550                mActionPopupWindow.hide();
10551            }
10552        }
10553
10554        public boolean isShowing() {
10555            return mContainer.isShowing();
10556        }
10557
10558        private boolean isVisible() {
10559            // Always show a dragging handle.
10560            if (mIsDragging) {
10561                return true;
10562            }
10563
10564            if (isInBatchEditMode()) {
10565                return false;
10566            }
10567
10568            return TextView.this.isPositionVisible(mPositionX + mHotspotX, mPositionY);
10569        }
10570
10571        public abstract int getCurrentCursorOffset();
10572
10573        protected abstract void updateSelection(int offset);
10574
10575        public abstract void updatePosition(float x, float y);
10576
10577        protected void positionAtCursorOffset(int offset, boolean parentScrolled) {
10578            // A HandleView relies on the layout, which may be nulled by external methods
10579            if (mLayout == null) {
10580                // Will update controllers' state, hiding them and stopping selection mode if needed
10581                prepareCursorControllers();
10582                return;
10583            }
10584
10585            if (offset != mPreviousOffset || parentScrolled) {
10586                updateSelection(offset);
10587                addPositionToTouchUpFilter(offset);
10588                final int line = mLayout.getLineForOffset(offset);
10589
10590                mPositionX = (int) (mLayout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX);
10591                mPositionY = mLayout.getLineBottom(line);
10592
10593                // Take TextView's padding and scroll into account.
10594                mPositionX += viewportToContentHorizontalOffset();
10595                mPositionY += viewportToContentVerticalOffset();
10596
10597                mPreviousOffset = offset;
10598                mPositionHasChanged = true;
10599            }
10600        }
10601
10602        public void updatePosition(int parentPositionX, int parentPositionY,
10603                boolean parentPositionChanged, boolean parentScrolled) {
10604            positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled);
10605            if (parentPositionChanged || mPositionHasChanged) {
10606                if (mIsDragging) {
10607                    // Update touchToWindow offset in case of parent scrolling while dragging
10608                    if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) {
10609                        mTouchToWindowOffsetX += parentPositionX - mLastParentX;
10610                        mTouchToWindowOffsetY += parentPositionY - mLastParentY;
10611                        mLastParentX = parentPositionX;
10612                        mLastParentY = parentPositionY;
10613                    }
10614
10615                    onHandleMoved();
10616                }
10617
10618                if (isVisible()) {
10619                    final int positionX = parentPositionX + mPositionX;
10620                    final int positionY = parentPositionY + mPositionY;
10621                    if (isShowing()) {
10622                        mContainer.update(positionX, positionY, -1, -1);
10623                    } else {
10624                        mContainer.showAtLocation(TextView.this, Gravity.NO_GRAVITY,
10625                                positionX, positionY);
10626                    }
10627                } else {
10628                    if (isShowing()) {
10629                        dismiss();
10630                    }
10631                }
10632
10633                mPositionHasChanged = false;
10634            }
10635        }
10636
10637        @Override
10638        protected void onDraw(Canvas c) {
10639            mDrawable.setBounds(0, 0, mRight - mLeft, mBottom - mTop);
10640            mDrawable.draw(c);
10641        }
10642
10643        @Override
10644        public boolean onTouchEvent(MotionEvent ev) {
10645            switch (ev.getActionMasked()) {
10646                case MotionEvent.ACTION_DOWN: {
10647                    startTouchUpFilter(getCurrentCursorOffset());
10648                    mTouchToWindowOffsetX = ev.getRawX() - mPositionX;
10649                    mTouchToWindowOffsetY = ev.getRawY() - mPositionY;
10650
10651                    final PositionListener positionListener = getPositionListener();
10652                    mLastParentX = positionListener.getPositionX();
10653                    mLastParentY = positionListener.getPositionY();
10654                    mIsDragging = true;
10655                    break;
10656                }
10657
10658                case MotionEvent.ACTION_MOVE: {
10659                    final float rawX = ev.getRawX();
10660                    final float rawY = ev.getRawY();
10661
10662                    // Vertical hysteresis: vertical down movement tends to snap to ideal offset
10663                    final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY;
10664                    final float currentVerticalOffset = rawY - mPositionY - mLastParentY;
10665                    float newVerticalOffset;
10666                    if (previousVerticalOffset < mIdealVerticalOffset) {
10667                        newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset);
10668                        newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset);
10669                    } else {
10670                        newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset);
10671                        newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset);
10672                    }
10673                    mTouchToWindowOffsetY = newVerticalOffset + mLastParentY;
10674
10675                    final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX;
10676                    final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY;
10677
10678                    updatePosition(newPosX, newPosY);
10679                    break;
10680                }
10681
10682                case MotionEvent.ACTION_UP:
10683                    filterOnTouchUp();
10684                    mIsDragging = false;
10685                    break;
10686
10687                case MotionEvent.ACTION_CANCEL:
10688                    mIsDragging = false;
10689                    break;
10690            }
10691            return true;
10692        }
10693
10694        public boolean isDragging() {
10695            return mIsDragging;
10696        }
10697
10698        void onHandleMoved() {
10699            hideActionPopupWindow();
10700        }
10701
10702        public void onDetached() {
10703            hideActionPopupWindow();
10704        }
10705    }
10706
10707    private class InsertionHandleView extends HandleView {
10708        private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000;
10709        private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds
10710
10711        // Used to detect taps on the insertion handle, which will affect the ActionPopupWindow
10712        private float mDownPositionX, mDownPositionY;
10713        private Runnable mHider;
10714
10715        public InsertionHandleView(Drawable drawable) {
10716            super(drawable, drawable);
10717        }
10718
10719        @Override
10720        public void show() {
10721            super.show();
10722
10723            final long durationSinceCutOrCopy = SystemClock.uptimeMillis() - sLastCutOrCopyTime;
10724            if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) {
10725                showActionPopupWindow(0);
10726            }
10727
10728            hideAfterDelay();
10729        }
10730
10731        public void showWithActionPopup() {
10732            show();
10733            showActionPopupWindow(0);
10734        }
10735
10736        private void hideAfterDelay() {
10737            removeHiderCallback();
10738            if (mHider == null) {
10739                mHider = new Runnable() {
10740                    public void run() {
10741                        hide();
10742                    }
10743                };
10744            }
10745            TextView.this.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT);
10746        }
10747
10748        private void removeHiderCallback() {
10749            if (mHider != null) {
10750                TextView.this.removeCallbacks(mHider);
10751            }
10752        }
10753
10754        @Override
10755        protected int getHotspotX(Drawable drawable, boolean isRtlRun) {
10756            return drawable.getIntrinsicWidth() / 2;
10757        }
10758
10759        @Override
10760        public boolean onTouchEvent(MotionEvent ev) {
10761            final boolean result = super.onTouchEvent(ev);
10762
10763            switch (ev.getActionMasked()) {
10764                case MotionEvent.ACTION_DOWN:
10765                    mDownPositionX = ev.getRawX();
10766                    mDownPositionY = ev.getRawY();
10767                    break;
10768
10769                case MotionEvent.ACTION_UP:
10770                    if (!offsetHasBeenChanged()) {
10771                        final float deltaX = mDownPositionX - ev.getRawX();
10772                        final float deltaY = mDownPositionY - ev.getRawY();
10773                        final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
10774                        if (distanceSquared < mSquaredTouchSlopDistance) {
10775                            if (mActionPopupWindow != null && mActionPopupWindow.isShowing()) {
10776                                // Tapping on the handle dismisses the displayed action popup
10777                                mActionPopupWindow.hide();
10778                            } else {
10779                                showWithActionPopup();
10780                            }
10781                        }
10782                    }
10783                    hideAfterDelay();
10784                    break;
10785
10786                case MotionEvent.ACTION_CANCEL:
10787                    hideAfterDelay();
10788                    break;
10789
10790                default:
10791                    break;
10792            }
10793
10794            return result;
10795        }
10796
10797        @Override
10798        public int getCurrentCursorOffset() {
10799            return TextView.this.getSelectionStart();
10800        }
10801
10802        @Override
10803        public void updateSelection(int offset) {
10804            Selection.setSelection((Spannable) mText, offset);
10805        }
10806
10807        @Override
10808        public void updatePosition(float x, float y) {
10809            positionAtCursorOffset(getOffsetForPosition(x, y), false);
10810        }
10811
10812        @Override
10813        void onHandleMoved() {
10814            super.onHandleMoved();
10815            removeHiderCallback();
10816        }
10817
10818        @Override
10819        public void onDetached() {
10820            super.onDetached();
10821            removeHiderCallback();
10822        }
10823    }
10824
10825    private class SelectionStartHandleView extends HandleView {
10826
10827        public SelectionStartHandleView(Drawable drawableLtr, Drawable drawableRtl) {
10828            super(drawableLtr, drawableRtl);
10829        }
10830
10831        @Override
10832        protected int getHotspotX(Drawable drawable, boolean isRtlRun) {
10833            if (isRtlRun) {
10834                return drawable.getIntrinsicWidth() / 4;
10835            } else {
10836                return (drawable.getIntrinsicWidth() * 3) / 4;
10837            }
10838        }
10839
10840        @Override
10841        public int getCurrentCursorOffset() {
10842            return TextView.this.getSelectionStart();
10843        }
10844
10845        @Override
10846        public void updateSelection(int offset) {
10847            Selection.setSelection((Spannable) mText, offset, getSelectionEnd());
10848            updateDrawable();
10849        }
10850
10851        @Override
10852        public void updatePosition(float x, float y) {
10853            int offset = getOffsetForPosition(x, y);
10854
10855            // Handles can not cross and selection is at least one character
10856            final int selectionEnd = getSelectionEnd();
10857            if (offset >= selectionEnd) offset = Math.max(0, selectionEnd - 1);
10858
10859            positionAtCursorOffset(offset, false);
10860        }
10861
10862        public ActionPopupWindow getActionPopupWindow() {
10863            return mActionPopupWindow;
10864        }
10865    }
10866
10867    private class SelectionEndHandleView extends HandleView {
10868
10869        public SelectionEndHandleView(Drawable drawableLtr, Drawable drawableRtl) {
10870            super(drawableLtr, drawableRtl);
10871        }
10872
10873        @Override
10874        protected int getHotspotX(Drawable drawable, boolean isRtlRun) {
10875            if (isRtlRun) {
10876                return (drawable.getIntrinsicWidth() * 3) / 4;
10877            } else {
10878                return drawable.getIntrinsicWidth() / 4;
10879            }
10880        }
10881
10882        @Override
10883        public int getCurrentCursorOffset() {
10884            return TextView.this.getSelectionEnd();
10885        }
10886
10887        @Override
10888        public void updateSelection(int offset) {
10889            Selection.setSelection((Spannable) mText, getSelectionStart(), offset);
10890            updateDrawable();
10891        }
10892
10893        @Override
10894        public void updatePosition(float x, float y) {
10895            int offset = getOffsetForPosition(x, y);
10896
10897            // Handles can not cross and selection is at least one character
10898            final int selectionStart = getSelectionStart();
10899            if (offset <= selectionStart) offset = Math.min(selectionStart + 1, mText.length());
10900
10901            positionAtCursorOffset(offset, false);
10902        }
10903
10904        public void setActionPopupWindow(ActionPopupWindow actionPopupWindow) {
10905            mActionPopupWindow = actionPopupWindow;
10906        }
10907    }
10908
10909    /**
10910     * A CursorController instance can be used to control a cursor in the text.
10911     * It is not used outside of {@link TextView}.
10912     * @hide
10913     */
10914    private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener {
10915        /**
10916         * Makes the cursor controller visible on screen. Will be drawn by {@link #draw(Canvas)}.
10917         * See also {@link #hide()}.
10918         */
10919        public void show();
10920
10921        /**
10922         * Hide the cursor controller from screen.
10923         * See also {@link #show()}.
10924         */
10925        public void hide();
10926
10927        /**
10928         * Called when the view is detached from window. Perform house keeping task, such as
10929         * stopping Runnable thread that would otherwise keep a reference on the context, thus
10930         * preventing the activity from being recycled.
10931         */
10932        public void onDetached();
10933    }
10934
10935    private class InsertionPointCursorController implements CursorController {
10936        private InsertionHandleView mHandle;
10937
10938        public void show() {
10939            getHandle().show();
10940        }
10941
10942        public void showWithActionPopup() {
10943            getHandle().showWithActionPopup();
10944        }
10945
10946        public void hide() {
10947            if (mHandle != null) {
10948                mHandle.hide();
10949            }
10950        }
10951
10952        public void onTouchModeChanged(boolean isInTouchMode) {
10953            if (!isInTouchMode) {
10954                hide();
10955            }
10956        }
10957
10958        private InsertionHandleView getHandle() {
10959            if (mSelectHandleCenter == null) {
10960                mSelectHandleCenter = mContext.getResources().getDrawable(
10961                        mTextSelectHandleRes);
10962            }
10963            if (mHandle == null) {
10964                mHandle = new InsertionHandleView(mSelectHandleCenter);
10965            }
10966            return mHandle;
10967        }
10968
10969        @Override
10970        public void onDetached() {
10971            final ViewTreeObserver observer = getViewTreeObserver();
10972            observer.removeOnTouchModeChangeListener(this);
10973
10974            if (mHandle != null) mHandle.onDetached();
10975        }
10976    }
10977
10978    private class SelectionModifierCursorController implements CursorController {
10979        private static final int DELAY_BEFORE_REPLACE_ACTION = 200; // milliseconds
10980        // The cursor controller handles, lazily created when shown.
10981        private SelectionStartHandleView mStartHandle;
10982        private SelectionEndHandleView mEndHandle;
10983        // The offsets of that last touch down event. Remembered to start selection there.
10984        private int mMinTouchOffset, mMaxTouchOffset;
10985
10986        // Double tap detection
10987        private long mPreviousTapUpTime = 0;
10988        private float mPreviousTapPositionX, mPreviousTapPositionY;
10989
10990        SelectionModifierCursorController() {
10991            resetTouchOffsets();
10992        }
10993
10994        public void show() {
10995            if (isInBatchEditMode()) {
10996                return;
10997            }
10998            initDrawables();
10999            initHandles();
11000            hideInsertionPointCursorController();
11001        }
11002
11003        private void initDrawables() {
11004            if (mSelectHandleLeft == null) {
11005                mSelectHandleLeft = mContext.getResources().getDrawable(
11006                        mTextSelectHandleLeftRes);
11007            }
11008            if (mSelectHandleRight == null) {
11009                mSelectHandleRight = mContext.getResources().getDrawable(
11010                        mTextSelectHandleRightRes);
11011            }
11012        }
11013
11014        private void initHandles() {
11015            // Lazy object creation has to be done before updatePosition() is called.
11016            if (mStartHandle == null) {
11017                mStartHandle = new SelectionStartHandleView(mSelectHandleLeft, mSelectHandleRight);
11018            }
11019            if (mEndHandle == null) {
11020                mEndHandle = new SelectionEndHandleView(mSelectHandleRight, mSelectHandleLeft);
11021            }
11022
11023            mStartHandle.show();
11024            mEndHandle.show();
11025
11026            // Make sure both left and right handles share the same ActionPopupWindow (so that
11027            // moving any of the handles hides the action popup).
11028            mStartHandle.showActionPopupWindow(DELAY_BEFORE_REPLACE_ACTION);
11029            mEndHandle.setActionPopupWindow(mStartHandle.getActionPopupWindow());
11030
11031            hideInsertionPointCursorController();
11032        }
11033
11034        public void hide() {
11035            if (mStartHandle != null) mStartHandle.hide();
11036            if (mEndHandle != null) mEndHandle.hide();
11037        }
11038
11039        public void onTouchEvent(MotionEvent event) {
11040            // This is done even when the View does not have focus, so that long presses can start
11041            // selection and tap can move cursor from this tap position.
11042            switch (event.getActionMasked()) {
11043                case MotionEvent.ACTION_DOWN:
11044                    final float x = event.getX();
11045                    final float y = event.getY();
11046
11047                    // Remember finger down position, to be able to start selection from there
11048                    mMinTouchOffset = mMaxTouchOffset = getOffsetForPosition(x, y);
11049
11050                    // Double tap detection
11051                    long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime;
11052                    if (duration <= ViewConfiguration.getDoubleTapTimeout() &&
11053                            isPositionOnText(x, y)) {
11054                        final float deltaX = x - mPreviousTapPositionX;
11055                        final float deltaY = y - mPreviousTapPositionY;
11056                        final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
11057                        if (distanceSquared < mSquaredTouchSlopDistance) {
11058                            startSelectionActionMode();
11059                            mDiscardNextActionUp = true;
11060                        }
11061                    }
11062
11063                    mPreviousTapPositionX = x;
11064                    mPreviousTapPositionY = y;
11065                    break;
11066
11067                case MotionEvent.ACTION_POINTER_DOWN:
11068                case MotionEvent.ACTION_POINTER_UP:
11069                    // Handle multi-point gestures. Keep min and max offset positions.
11070                    // Only activated for devices that correctly handle multi-touch.
11071                    if (mContext.getPackageManager().hasSystemFeature(
11072                            PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) {
11073                        updateMinAndMaxOffsets(event);
11074                    }
11075                    break;
11076
11077                case MotionEvent.ACTION_UP:
11078                    mPreviousTapUpTime = SystemClock.uptimeMillis();
11079                    break;
11080            }
11081        }
11082
11083        /**
11084         * @param event
11085         */
11086        private void updateMinAndMaxOffsets(MotionEvent event) {
11087            int pointerCount = event.getPointerCount();
11088            for (int index = 0; index < pointerCount; index++) {
11089                int offset = getOffsetForPosition(event.getX(index), event.getY(index));
11090                if (offset < mMinTouchOffset) mMinTouchOffset = offset;
11091                if (offset > mMaxTouchOffset) mMaxTouchOffset = offset;
11092            }
11093        }
11094
11095        public int getMinTouchOffset() {
11096            return mMinTouchOffset;
11097        }
11098
11099        public int getMaxTouchOffset() {
11100            return mMaxTouchOffset;
11101        }
11102
11103        public void resetTouchOffsets() {
11104            mMinTouchOffset = mMaxTouchOffset = -1;
11105        }
11106
11107        /**
11108         * @return true iff this controller is currently used to move the selection start.
11109         */
11110        public boolean isSelectionStartDragged() {
11111            return mStartHandle != null && mStartHandle.isDragging();
11112        }
11113
11114        public void onTouchModeChanged(boolean isInTouchMode) {
11115            if (!isInTouchMode) {
11116                hide();
11117            }
11118        }
11119
11120        @Override
11121        public void onDetached() {
11122            final ViewTreeObserver observer = getViewTreeObserver();
11123            observer.removeOnTouchModeChangeListener(this);
11124
11125            if (mStartHandle != null) mStartHandle.onDetached();
11126            if (mEndHandle != null) mEndHandle.onDetached();
11127        }
11128    }
11129
11130    private void hideInsertionPointCursorController() {
11131        // No need to create the controller to hide it.
11132        if (mInsertionPointCursorController != null) {
11133            mInsertionPointCursorController.hide();
11134        }
11135    }
11136
11137    /**
11138     * Hides the insertion controller and stops text selection mode, hiding the selection controller
11139     */
11140    private void hideControllers() {
11141        hideCursorControllers();
11142        hideSpanControllers();
11143    }
11144
11145    private void hideSpanControllers() {
11146        if (mChangeWatcher != null) {
11147            mChangeWatcher.hideControllers();
11148        }
11149    }
11150
11151    private void hideCursorControllers() {
11152        if (mSuggestionsPopupWindow != null && !mSuggestionsPopupWindow.isShowingUp()) {
11153            // Should be done before hide insertion point controller since it triggers a show of it
11154            mSuggestionsPopupWindow.hide();
11155        }
11156        hideInsertionPointCursorController();
11157        stopSelectionActionMode();
11158    }
11159
11160    /**
11161     * Get the character offset closest to the specified absolute position. A typical use case is to
11162     * pass the result of {@link MotionEvent#getX()} and {@link MotionEvent#getY()} to this method.
11163     *
11164     * @param x The horizontal absolute position of a point on screen
11165     * @param y The vertical absolute position of a point on screen
11166     * @return the character offset for the character whose position is closest to the specified
11167     *  position. Returns -1 if there is no layout.
11168     */
11169    public int getOffsetForPosition(float x, float y) {
11170        if (getLayout() == null) return -1;
11171        final int line = getLineAtCoordinate(y);
11172        final int offset = getOffsetAtCoordinate(line, x);
11173        return offset;
11174    }
11175
11176    private float convertToLocalHorizontalCoordinate(float x) {
11177        x -= getTotalPaddingLeft();
11178        // Clamp the position to inside of the view.
11179        x = Math.max(0.0f, x);
11180        x = Math.min(getWidth() - getTotalPaddingRight() - 1, x);
11181        x += getScrollX();
11182        return x;
11183    }
11184
11185    private int getLineAtCoordinate(float y) {
11186        y -= getTotalPaddingTop();
11187        // Clamp the position to inside of the view.
11188        y = Math.max(0.0f, y);
11189        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
11190        y += getScrollY();
11191        return getLayout().getLineForVertical((int) y);
11192    }
11193
11194    private int getOffsetAtCoordinate(int line, float x) {
11195        x = convertToLocalHorizontalCoordinate(x);
11196        return getLayout().getOffsetForHorizontal(line, x);
11197    }
11198
11199    /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed
11200     * in the view. Returns false when the position is in the empty space of left/right of text.
11201     */
11202    private boolean isPositionOnText(float x, float y) {
11203        if (getLayout() == null) return false;
11204
11205        final int line = getLineAtCoordinate(y);
11206        x = convertToLocalHorizontalCoordinate(x);
11207
11208        if (x < getLayout().getLineLeft(line)) return false;
11209        if (x > getLayout().getLineRight(line)) return false;
11210        return true;
11211    }
11212
11213    @Override
11214    public boolean onDragEvent(DragEvent event) {
11215        switch (event.getAction()) {
11216            case DragEvent.ACTION_DRAG_STARTED:
11217                return hasInsertionController();
11218
11219            case DragEvent.ACTION_DRAG_ENTERED:
11220                TextView.this.requestFocus();
11221                return true;
11222
11223            case DragEvent.ACTION_DRAG_LOCATION:
11224                final int offset = getOffsetForPosition(event.getX(), event.getY());
11225                Selection.setSelection((Spannable)mText, offset);
11226                return true;
11227
11228            case DragEvent.ACTION_DROP:
11229                onDrop(event);
11230                return true;
11231
11232            case DragEvent.ACTION_DRAG_ENDED:
11233            case DragEvent.ACTION_DRAG_EXITED:
11234            default:
11235                return true;
11236        }
11237    }
11238
11239    private void onDrop(DragEvent event) {
11240        StringBuilder content = new StringBuilder("");
11241        ClipData clipData = event.getClipData();
11242        final int itemCount = clipData.getItemCount();
11243        for (int i=0; i < itemCount; i++) {
11244            Item item = clipData.getItemAt(i);
11245            content.append(item.coerceToText(TextView.this.mContext));
11246        }
11247
11248        final int offset = getOffsetForPosition(event.getX(), event.getY());
11249
11250        Object localState = event.getLocalState();
11251        DragLocalState dragLocalState = null;
11252        if (localState instanceof DragLocalState) {
11253            dragLocalState = (DragLocalState) localState;
11254        }
11255        boolean dragDropIntoItself = dragLocalState != null &&
11256                dragLocalState.sourceTextView == this;
11257
11258        if (dragDropIntoItself) {
11259            if (offset >= dragLocalState.start && offset < dragLocalState.end) {
11260                // A drop inside the original selection discards the drop.
11261                return;
11262            }
11263        }
11264
11265        final int originalLength = mText.length();
11266        long minMax = prepareSpacesAroundPaste(offset, offset, content);
11267        int min = extractRangeStartFromLong(minMax);
11268        int max = extractRangeEndFromLong(minMax);
11269
11270        Selection.setSelection((Spannable) mText, max);
11271        replaceText_internal(min, max, content);
11272
11273        if (dragDropIntoItself) {
11274            int dragSourceStart = dragLocalState.start;
11275            int dragSourceEnd = dragLocalState.end;
11276            if (max <= dragSourceStart) {
11277                // Inserting text before selection has shifted positions
11278                final int shift = mText.length() - originalLength;
11279                dragSourceStart += shift;
11280                dragSourceEnd += shift;
11281            }
11282
11283            // Delete original selection
11284            deleteText_internal(dragSourceStart, dragSourceEnd);
11285
11286            // Make sure we do not leave two adjacent spaces.
11287            if ((dragSourceStart == 0 ||
11288                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart - 1))) &&
11289                    (dragSourceStart == mText.length() ||
11290                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart)))) {
11291                final int pos = dragSourceStart == mText.length() ?
11292                        dragSourceStart - 1 : dragSourceStart;
11293                deleteText_internal(pos, pos + 1);
11294            }
11295        }
11296    }
11297
11298    /**
11299     * @return True if this view supports insertion handles.
11300     */
11301    boolean hasInsertionController() {
11302        return mInsertionControllerEnabled;
11303    }
11304
11305    /**
11306     * @return True if this view supports selection handles.
11307     */
11308    boolean hasSelectionController() {
11309        return mSelectionControllerEnabled;
11310    }
11311
11312    InsertionPointCursorController getInsertionController() {
11313        if (!mInsertionControllerEnabled) {
11314            return null;
11315        }
11316
11317        if (mInsertionPointCursorController == null) {
11318            mInsertionPointCursorController = new InsertionPointCursorController();
11319
11320            final ViewTreeObserver observer = getViewTreeObserver();
11321            observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
11322        }
11323
11324        return mInsertionPointCursorController;
11325    }
11326
11327    SelectionModifierCursorController getSelectionController() {
11328        if (!mSelectionControllerEnabled) {
11329            return null;
11330        }
11331
11332        if (mSelectionModifierCursorController == null) {
11333            mSelectionModifierCursorController = new SelectionModifierCursorController();
11334
11335            final ViewTreeObserver observer = getViewTreeObserver();
11336            observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
11337        }
11338
11339        return mSelectionModifierCursorController;
11340    }
11341
11342    boolean isInBatchEditMode() {
11343        final InputMethodState ims = mInputMethodState;
11344        if (ims != null) {
11345            return ims.mBatchEditNesting > 0;
11346        }
11347        return mInBatchEditControllers;
11348    }
11349
11350    @Override
11351    protected void resolveTextDirection() {
11352        if (hasPasswordTransformationMethod()) {
11353            mTextDir = TextDirectionHeuristics.LOCALE;
11354            return;
11355        }
11356
11357        // Always need to resolve layout direction first
11358        final boolean defaultIsRtl = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL);
11359
11360        // Then resolve text direction on the parent
11361        super.resolveTextDirection();
11362
11363        // Now, we can select the heuristic
11364        int textDir = getResolvedTextDirection();
11365        switch (textDir) {
11366            default:
11367            case TEXT_DIRECTION_FIRST_STRONG:
11368                mTextDir = (defaultIsRtl ? TextDirectionHeuristics.FIRSTSTRONG_RTL :
11369                        TextDirectionHeuristics.FIRSTSTRONG_LTR);
11370                break;
11371            case TEXT_DIRECTION_ANY_RTL:
11372                mTextDir = TextDirectionHeuristics.ANYRTL_LTR;
11373                break;
11374            case TEXT_DIRECTION_LTR:
11375                mTextDir = TextDirectionHeuristics.LTR;
11376                break;
11377            case TEXT_DIRECTION_RTL:
11378                mTextDir = TextDirectionHeuristics.RTL;
11379                break;
11380        }
11381    }
11382
11383    /**
11384     * Subclasses will need to override this method to implement their own way of resolving
11385     * drawables depending on the layout direction.
11386     *
11387     * A call to the super method will be required from the subclasses implementation.
11388     *
11389     */
11390    protected void resolveDrawables() {
11391        // No need to resolve twice
11392        if (mResolvedDrawables) {
11393            return;
11394        }
11395        // No drawable to resolve
11396        if (mDrawables == null) {
11397            return;
11398        }
11399        // No relative drawable to resolve
11400        if (mDrawables.mDrawableStart == null && mDrawables.mDrawableEnd == null) {
11401            mResolvedDrawables = true;
11402            return;
11403        }
11404
11405        Drawables dr = mDrawables;
11406        switch(getResolvedLayoutDirection()) {
11407            case LAYOUT_DIRECTION_RTL:
11408                if (dr.mDrawableStart != null) {
11409                    dr.mDrawableRight = dr.mDrawableStart;
11410
11411                    dr.mDrawableSizeRight = dr.mDrawableSizeStart;
11412                    dr.mDrawableHeightRight = dr.mDrawableHeightStart;
11413                }
11414                if (dr.mDrawableEnd != null) {
11415                    dr.mDrawableLeft = dr.mDrawableEnd;
11416
11417                    dr.mDrawableSizeLeft = dr.mDrawableSizeEnd;
11418                    dr.mDrawableHeightLeft = dr.mDrawableHeightEnd;
11419                }
11420                break;
11421
11422            case LAYOUT_DIRECTION_LTR:
11423            default:
11424                if (dr.mDrawableStart != null) {
11425                    dr.mDrawableLeft = dr.mDrawableStart;
11426
11427                    dr.mDrawableSizeLeft = dr.mDrawableSizeStart;
11428                    dr.mDrawableHeightLeft = dr.mDrawableHeightStart;
11429                }
11430                if (dr.mDrawableEnd != null) {
11431                    dr.mDrawableRight = dr.mDrawableEnd;
11432
11433                    dr.mDrawableSizeRight = dr.mDrawableSizeEnd;
11434                    dr.mDrawableHeightRight = dr.mDrawableHeightEnd;
11435                }
11436                break;
11437        }
11438        mResolvedDrawables = true;
11439    }
11440
11441    protected void resetResolvedDrawables() {
11442        mResolvedDrawables = false;
11443    }
11444
11445    /**
11446     * @hide
11447     */
11448    protected void viewClicked(InputMethodManager imm) {
11449        if (imm != null) {
11450            imm.viewClicked(this);
11451        }
11452    }
11453
11454    /**
11455     * Deletes the range of text [start, end[.
11456     * @hide
11457     */
11458    protected void deleteText_internal(int start, int end) {
11459        ((Editable) mText).delete(start, end);
11460    }
11461
11462    /**
11463     * Replaces the range of text [start, end[ by replacement text
11464     * @hide
11465     */
11466    protected void replaceText_internal(int start, int end, CharSequence text) {
11467        ((Editable) mText).replace(start, end, text);
11468    }
11469
11470    /**
11471     * Sets a span on the specified range of text
11472     * @hide
11473     */
11474    protected void setSpan_internal(Object span, int start, int end, int flags) {
11475        ((Editable) mText).setSpan(span, start, end, flags);
11476    }
11477
11478    /**
11479     * Moves the cursor to the specified offset position in text
11480     * @hide
11481     */
11482    protected void setCursorPosition_internal(int start, int end) {
11483        Selection.setSelection(((Editable) mText), start, end);
11484    }
11485
11486    @ViewDebug.ExportedProperty(category = "text")
11487    private CharSequence            mText;
11488    private CharSequence            mTransformed;
11489    private BufferType              mBufferType = BufferType.NORMAL;
11490
11491    private int                     mInputType = EditorInfo.TYPE_NULL;
11492    private CharSequence            mHint;
11493    private Layout                  mHintLayout;
11494
11495    private KeyListener             mInput;
11496
11497    private MovementMethod          mMovement;
11498    private TransformationMethod    mTransformation;
11499    private boolean                 mAllowTransformationLengthChange;
11500    private ChangeWatcher           mChangeWatcher;
11501
11502    private ArrayList<TextWatcher>  mListeners = null;
11503
11504    // display attributes
11505    private final TextPaint         mTextPaint;
11506    private boolean                 mUserSetTextScaleX;
11507    private final Paint             mHighlightPaint;
11508    private int                     mHighlightColor = 0x6633B5E5;
11509    private Layout                  mLayout;
11510
11511    private long                    mShowCursor;
11512    private Blink                   mBlink;
11513    private boolean                 mCursorVisible = true;
11514
11515    // Cursor Controllers.
11516    private InsertionPointCursorController mInsertionPointCursorController;
11517    private SelectionModifierCursorController mSelectionModifierCursorController;
11518    private ActionMode              mSelectionActionMode;
11519    private boolean                 mInsertionControllerEnabled;
11520    private boolean                 mSelectionControllerEnabled;
11521    private boolean                 mInBatchEditControllers;
11522
11523    private boolean                 mSelectAllOnFocus = false;
11524
11525    private int                     mGravity = Gravity.TOP | Gravity.START;
11526    private boolean                 mHorizontallyScrolling;
11527
11528    private int                     mAutoLinkMask;
11529    private boolean                 mLinksClickable = true;
11530
11531    private float                   mSpacingMult = 1.0f;
11532    private float                   mSpacingAdd = 0.0f;
11533    private boolean                 mTextIsSelectable = false;
11534
11535    private static final int        LINES = 1;
11536    private static final int        EMS = LINES;
11537    private static final int        PIXELS = 2;
11538
11539    private int                     mMaximum = Integer.MAX_VALUE;
11540    private int                     mMaxMode = LINES;
11541    private int                     mMinimum = 0;
11542    private int                     mMinMode = LINES;
11543
11544    private int                     mOldMaximum = mMaximum;
11545    private int                     mOldMaxMode = mMaxMode;
11546
11547    private int                     mMaxWidth = Integer.MAX_VALUE;
11548    private int                     mMaxWidthMode = PIXELS;
11549    private int                     mMinWidth = 0;
11550    private int                     mMinWidthMode = PIXELS;
11551
11552    private boolean                 mSingleLine;
11553    private int                     mDesiredHeightAtMeasure = -1;
11554    private boolean                 mIncludePad = true;
11555
11556    // tmp primitives, so we don't alloc them on each draw
11557    private Path                    mHighlightPath;
11558    private boolean                 mHighlightPathBogus = true;
11559    private static final RectF      sTempRect = new RectF();
11560    private static final float[]    sTmpPosition = new float[2];
11561
11562    // XXX should be much larger
11563    private static final int        VERY_WIDE = 1024*1024;
11564
11565    private static final int        BLINK = 500;
11566
11567    private static final int ANIMATED_SCROLL_GAP = 250;
11568    private long mLastScroll;
11569    private Scroller mScroller = null;
11570
11571    private BoringLayout.Metrics mBoring;
11572    private BoringLayout.Metrics mHintBoring;
11573
11574    private BoringLayout mSavedLayout, mSavedHintLayout;
11575
11576    private TextDirectionHeuristic mTextDir = null;
11577
11578    private static final InputFilter[] NO_FILTERS = new InputFilter[0];
11579    private InputFilter[] mFilters = NO_FILTERS;
11580    private static final Spanned EMPTY_SPANNED = new SpannedString("");
11581    private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20;
11582    // System wide time for last cut or copy action.
11583    private static long sLastCutOrCopyTime;
11584    // Used to highlight a word when it is corrected by the IME
11585    private CorrectionHighlighter mCorrectionHighlighter;
11586    // New state used to change background based on whether this TextView is multiline.
11587    private static final int[] MULTILINE_STATE_SET = { R.attr.state_multiline };
11588}
11589