TextView.java revision 683a485fbcf72caad42f9fd030255f1083ce5637 
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
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        boolean startSpellCheck = false;
3214
3215        if (mListeners != null && mListeners.size() != 0) {
3216            needEditableForNotification = true;
3217        }
3218
3219        if (type == BufferType.EDITABLE || mInput != null || needEditableForNotification) {
3220            Editable t = mEditableFactory.newEditable(text);
3221            text = t;
3222            setFilters(t, mFilters);
3223            InputMethodManager imm = InputMethodManager.peekInstance();
3224            if (imm != null) imm.restartInput(this);
3225            startSpellCheck = true;
3226        } else if (type == BufferType.SPANNABLE || mMovement != null) {
3227            text = mSpannableFactory.newSpannable(text);
3228        } else if (!(text instanceof CharWrapper)) {
3229            text = TextUtils.stringOrSpannedString(text);
3230        }
3231
3232        if (mAutoLinkMask != 0) {
3233            Spannable s2;
3234
3235            if (type == BufferType.EDITABLE || text instanceof Spannable) {
3236                s2 = (Spannable) text;
3237            } else {
3238                s2 = mSpannableFactory.newSpannable(text);
3239            }
3240
3241            if (Linkify.addLinks(s2, mAutoLinkMask)) {
3242                text = s2;
3243                type = (type == BufferType.EDITABLE) ? BufferType.EDITABLE : BufferType.SPANNABLE;
3244
3245                /*
3246                 * We must go ahead and set the text before changing the
3247                 * movement method, because setMovementMethod() may call
3248                 * setText() again to try to upgrade the buffer type.
3249                 */
3250                mText = text;
3251
3252                // Do not change the movement method for text that support text selection as it
3253                // would prevent an arbitrary cursor displacement.
3254                if (mLinksClickable && !textCanBeSelected()) {
3255                    setMovementMethod(LinkMovementMethod.getInstance());
3256                }
3257            }
3258        }
3259
3260        mBufferType = type;
3261        mText = text;
3262
3263        if (mTransformation == null) {
3264            mTransformed = text;
3265        } else {
3266            mTransformed = mTransformation.getTransformation(text, this);
3267        }
3268
3269        final int textLength = text.length();
3270
3271        if (text instanceof Spannable && !mAllowTransformationLengthChange) {
3272            Spannable sp = (Spannable) text;
3273
3274            // Remove any ChangeWatchers that might have come
3275            // from other TextViews.
3276            final ChangeWatcher[] watchers = sp.getSpans(0, sp.length(), ChangeWatcher.class);
3277            final int count = watchers.length;
3278            for (int i = 0; i < count; i++)
3279                sp.removeSpan(watchers[i]);
3280
3281            if (mChangeWatcher == null)
3282                mChangeWatcher = new ChangeWatcher();
3283
3284            sp.setSpan(mChangeWatcher, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE |
3285                       (PRIORITY << Spanned.SPAN_PRIORITY_SHIFT));
3286
3287            if (mInput != null) {
3288                sp.setSpan(mInput, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
3289            }
3290
3291            if (mTransformation != null) {
3292                sp.setSpan(mTransformation, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
3293            }
3294
3295            if (mMovement != null) {
3296                mMovement.initialize(this, (Spannable) text);
3297
3298                /*
3299                 * Initializing the movement method will have set the
3300                 * selection, so reset mSelectionMoved to keep that from
3301                 * interfering with the normal on-focus selection-setting.
3302                 */
3303                mSelectionMoved = false;
3304            }
3305        }
3306
3307        if (mLayout != null) {
3308            checkForRelayout();
3309        }
3310
3311        sendOnTextChanged(text, 0, oldlen, textLength);
3312        onTextChanged(text, 0, oldlen, textLength);
3313
3314        if (startSpellCheck && mSpellChecker != null) {
3315            // This view has to have been previously attached for mSpellChecker to exist
3316            updateSpellCheckSpans(0, textLength);
3317        }
3318
3319        if (needEditableForNotification) {
3320            sendAfterTextChanged((Editable) text);
3321        }
3322
3323        // SelectionModifierCursorController depends on textCanBeSelected, which depends on text
3324        prepareCursorControllers();
3325    }
3326
3327    /**
3328     * Sets the TextView to display the specified slice of the specified
3329     * char array.  You must promise that you will not change the contents
3330     * of the array except for right before another call to setText(),
3331     * since the TextView has no way to know that the text
3332     * has changed and that it needs to invalidate and re-layout.
3333     */
3334    public final void setText(char[] text, int start, int len) {
3335        int oldlen = 0;
3336
3337        if (start < 0 || len < 0 || start + len > text.length) {
3338            throw new IndexOutOfBoundsException(start + ", " + len);
3339        }
3340
3341        /*
3342         * We must do the before-notification here ourselves because if
3343         * the old text is a CharWrapper we destroy it before calling
3344         * into the normal path.
3345         */
3346        if (mText != null) {
3347            oldlen = mText.length();
3348            sendBeforeTextChanged(mText, 0, oldlen, len);
3349        } else {
3350            sendBeforeTextChanged("", 0, 0, len);
3351        }
3352
3353        if (mCharWrapper == null) {
3354            mCharWrapper = new CharWrapper(text, start, len);
3355        } else {
3356            mCharWrapper.set(text, start, len);
3357        }
3358
3359        setText(mCharWrapper, mBufferType, false, oldlen);
3360    }
3361
3362    private static class CharWrapper implements CharSequence, GetChars, GraphicsOperations {
3363        private char[] mChars;
3364        private int mStart, mLength;
3365
3366        public CharWrapper(char[] chars, int start, int len) {
3367            mChars = chars;
3368            mStart = start;
3369            mLength = len;
3370        }
3371
3372        /* package */ void set(char[] chars, int start, int len) {
3373            mChars = chars;
3374            mStart = start;
3375            mLength = len;
3376        }
3377
3378        public int length() {
3379            return mLength;
3380        }
3381
3382        public char charAt(int off) {
3383            return mChars[off + mStart];
3384        }
3385
3386        @Override
3387        public String toString() {
3388            return new String(mChars, mStart, mLength);
3389        }
3390
3391        public CharSequence subSequence(int start, int end) {
3392            if (start < 0 || end < 0 || start > mLength || end > mLength) {
3393                throw new IndexOutOfBoundsException(start + ", " + end);
3394            }
3395
3396            return new String(mChars, start + mStart, end - start);
3397        }
3398
3399        public void getChars(int start, int end, char[] buf, int off) {
3400            if (start < 0 || end < 0 || start > mLength || end > mLength) {
3401                throw new IndexOutOfBoundsException(start + ", " + end);
3402            }
3403
3404            System.arraycopy(mChars, start + mStart, buf, off, end - start);
3405        }
3406
3407        public void drawText(Canvas c, int start, int end,
3408                             float x, float y, Paint p) {
3409            c.drawText(mChars, start + mStart, end - start, x, y, p);
3410        }
3411
3412        public void drawTextRun(Canvas c, int start, int end,
3413                int contextStart, int contextEnd, float x, float y, int flags, Paint p) {
3414            int count = end - start;
3415            int contextCount = contextEnd - contextStart;
3416            c.drawTextRun(mChars, start + mStart, count, contextStart + mStart,
3417                    contextCount, x, y, flags, p);
3418        }
3419
3420        public float measureText(int start, int end, Paint p) {
3421            return p.measureText(mChars, start + mStart, end - start);
3422        }
3423
3424        public int getTextWidths(int start, int end, float[] widths, Paint p) {
3425            return p.getTextWidths(mChars, start + mStart, end - start, widths);
3426        }
3427
3428        public float getTextRunAdvances(int start, int end, int contextStart,
3429                int contextEnd, int flags, float[] advances, int advancesIndex,
3430                Paint p) {
3431            int count = end - start;
3432            int contextCount = contextEnd - contextStart;
3433            return p.getTextRunAdvances(mChars, start + mStart, count,
3434                    contextStart + mStart, contextCount, flags, advances,
3435                    advancesIndex);
3436        }
3437
3438        public float getTextRunAdvances(int start, int end, int contextStart,
3439                int contextEnd, int flags, float[] advances, int advancesIndex,
3440                Paint p, int reserved) {
3441            int count = end - start;
3442            int contextCount = contextEnd - contextStart;
3443            return p.getTextRunAdvances(mChars, start + mStart, count,
3444                    contextStart + mStart, contextCount, flags, advances,
3445                    advancesIndex, reserved);
3446        }
3447
3448        public int getTextRunCursor(int contextStart, int contextEnd, int flags,
3449                int offset, int cursorOpt, Paint p) {
3450            int contextCount = contextEnd - contextStart;
3451            return p.getTextRunCursor(mChars, contextStart + mStart,
3452                    contextCount, flags, offset + mStart, cursorOpt);
3453        }
3454    }
3455
3456    /**
3457     * Like {@link #setText(CharSequence, android.widget.TextView.BufferType)},
3458     * except that the cursor position (if any) is retained in the new text.
3459     *
3460     * @see #setText(CharSequence, android.widget.TextView.BufferType)
3461     */
3462    public final void setTextKeepState(CharSequence text, BufferType type) {
3463        int start = getSelectionStart();
3464        int end = getSelectionEnd();
3465        int len = text.length();
3466
3467        setText(text, type);
3468
3469        if (start >= 0 || end >= 0) {
3470            if (mText instanceof Spannable) {
3471                Selection.setSelection((Spannable) mText,
3472                                       Math.max(0, Math.min(start, len)),
3473                                       Math.max(0, Math.min(end, len)));
3474            }
3475        }
3476    }
3477
3478    @android.view.RemotableViewMethod
3479    public final void setText(int resid) {
3480        setText(getContext().getResources().getText(resid));
3481    }
3482
3483    public final void setText(int resid, BufferType type) {
3484        setText(getContext().getResources().getText(resid), type);
3485    }
3486
3487    /**
3488     * Sets the text to be displayed when the text of the TextView is empty.
3489     * Null means to use the normal empty text. The hint does not currently
3490     * participate in determining the size of the view.
3491     *
3492     * @attr ref android.R.styleable#TextView_hint
3493     */
3494    @android.view.RemotableViewMethod
3495    public final void setHint(CharSequence hint) {
3496        mHint = TextUtils.stringOrSpannedString(hint);
3497
3498        if (mLayout != null) {
3499            checkForRelayout();
3500        }
3501
3502        if (mText.length() == 0) {
3503            invalidate();
3504        }
3505    }
3506
3507    /**
3508     * Sets the text to be displayed when the text of the TextView is empty,
3509     * from a resource.
3510     *
3511     * @attr ref android.R.styleable#TextView_hint
3512     */
3513    @android.view.RemotableViewMethod
3514    public final void setHint(int resid) {
3515        setHint(getContext().getResources().getText(resid));
3516    }
3517
3518    /**
3519     * Returns the hint that is displayed when the text of the TextView
3520     * is empty.
3521     *
3522     * @attr ref android.R.styleable#TextView_hint
3523     */
3524    @ViewDebug.CapturedViewProperty
3525    public CharSequence getHint() {
3526        return mHint;
3527    }
3528
3529    private static boolean isMultilineInputType(int type) {
3530        return (type & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE)) ==
3531            (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE);
3532    }
3533
3534    /**
3535     * Set the type of the content with a constant as defined for {@link EditorInfo#inputType}. This
3536     * will take care of changing the key listener, by calling {@link #setKeyListener(KeyListener)},
3537     * to match the given content type.  If the given content type is {@link EditorInfo#TYPE_NULL}
3538     * then a soft keyboard will not be displayed for this text view.
3539     *
3540     * Note that the maximum number of displayed lines (see {@link #setMaxLines(int)}) will be
3541     * modified if you change the {@link EditorInfo#TYPE_TEXT_FLAG_MULTI_LINE} flag of the input
3542     * type.
3543     *
3544     * @see #getInputType()
3545     * @see #setRawInputType(int)
3546     * @see android.text.InputType
3547     * @attr ref android.R.styleable#TextView_inputType
3548     */
3549    public void setInputType(int type) {
3550        final boolean wasPassword = isPasswordInputType(mInputType);
3551        final boolean wasVisiblePassword = isVisiblePasswordInputType(mInputType);
3552        setInputType(type, false);
3553        final boolean isPassword = isPasswordInputType(type);
3554        final boolean isVisiblePassword = isVisiblePasswordInputType(type);
3555        boolean forceUpdate = false;
3556        if (isPassword) {
3557            setTransformationMethod(PasswordTransformationMethod.getInstance());
3558            setTypefaceByIndex(MONOSPACE, 0);
3559        } else if (isVisiblePassword) {
3560            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3561                forceUpdate = true;
3562            }
3563            setTypefaceByIndex(MONOSPACE, 0);
3564        } else if (wasPassword || wasVisiblePassword) {
3565            // not in password mode, clean up typeface and transformation
3566            setTypefaceByIndex(-1, -1);
3567            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3568                forceUpdate = true;
3569            }
3570        }
3571
3572        boolean singleLine = !isMultilineInputType(type);
3573
3574        // We need to update the single line mode if it has changed or we
3575        // were previously in password mode.
3576        if (mSingleLine != singleLine || forceUpdate) {
3577            // Change single line mode, but only change the transformation if
3578            // we are not in password mode.
3579            applySingleLine(singleLine, !isPassword, true);
3580        }
3581
3582        if (!isSuggestionsEnabled()) {
3583            mText = removeSuggestionSpans(mText);
3584        }
3585
3586        InputMethodManager imm = InputMethodManager.peekInstance();
3587        if (imm != null) imm.restartInput(this);
3588    }
3589
3590    /**
3591     * It would be better to rely on the input type for everything. A password inputType should have
3592     * a password transformation. We should hence use isPasswordInputType instead of this method.
3593     *
3594     * We should:
3595     * - Call setInputType in setKeyListener instead of changing the input type directly (which
3596     * would install the correct transformation).
3597     * - Refuse the installation of a non-password transformation in setTransformation if the input
3598     * type is password.
3599     *
3600     * However, this is like this for legacy reasons and we cannot break existing apps. This method
3601     * is useful since it matches what the user can see (obfuscated text or not).
3602     *
3603     * @return true if the current transformation method is of the password type.
3604     */
3605    private boolean hasPasswordTransformationMethod() {
3606        return mTransformation instanceof PasswordTransformationMethod;
3607    }
3608
3609    private static boolean isPasswordInputType(int inputType) {
3610        final int variation =
3611                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3612        return variation
3613                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)
3614                || variation
3615                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD)
3616                || variation
3617                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
3618    }
3619
3620    private static boolean isVisiblePasswordInputType(int inputType) {
3621        final int variation =
3622                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3623        return variation
3624                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
3625    }
3626
3627    /**
3628     * Directly change the content type integer of the text view, without
3629     * modifying any other state.
3630     * @see #setInputType(int)
3631     * @see android.text.InputType
3632     * @attr ref android.R.styleable#TextView_inputType
3633     */
3634    public void setRawInputType(int type) {
3635        mInputType = type;
3636    }
3637
3638    private void setInputType(int type, boolean direct) {
3639        final int cls = type & EditorInfo.TYPE_MASK_CLASS;
3640        KeyListener input;
3641        if (cls == EditorInfo.TYPE_CLASS_TEXT) {
3642            boolean autotext = (type & EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT) != 0;
3643            TextKeyListener.Capitalize cap;
3644            if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS) != 0) {
3645                cap = TextKeyListener.Capitalize.CHARACTERS;
3646            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS) != 0) {
3647                cap = TextKeyListener.Capitalize.WORDS;
3648            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES) != 0) {
3649                cap = TextKeyListener.Capitalize.SENTENCES;
3650            } else {
3651                cap = TextKeyListener.Capitalize.NONE;
3652            }
3653            input = TextKeyListener.getInstance(autotext, cap);
3654        } else if (cls == EditorInfo.TYPE_CLASS_NUMBER) {
3655            input = DigitsKeyListener.getInstance(
3656                    (type & EditorInfo.TYPE_NUMBER_FLAG_SIGNED) != 0,
3657                    (type & EditorInfo.TYPE_NUMBER_FLAG_DECIMAL) != 0);
3658        } else if (cls == EditorInfo.TYPE_CLASS_DATETIME) {
3659            switch (type & EditorInfo.TYPE_MASK_VARIATION) {
3660                case EditorInfo.TYPE_DATETIME_VARIATION_DATE:
3661                    input = DateKeyListener.getInstance();
3662                    break;
3663                case EditorInfo.TYPE_DATETIME_VARIATION_TIME:
3664                    input = TimeKeyListener.getInstance();
3665                    break;
3666                default:
3667                    input = DateTimeKeyListener.getInstance();
3668                    break;
3669            }
3670        } else if (cls == EditorInfo.TYPE_CLASS_PHONE) {
3671            input = DialerKeyListener.getInstance();
3672        } else {
3673            input = TextKeyListener.getInstance();
3674        }
3675        setRawInputType(type);
3676        if (direct) mInput = input;
3677        else {
3678            setKeyListenerOnly(input);
3679        }
3680    }
3681
3682    /**
3683     * Get the type of the content.
3684     *
3685     * @see #setInputType(int)
3686     * @see android.text.InputType
3687     */
3688    public int getInputType() {
3689        return mInputType;
3690    }
3691
3692    /**
3693     * Change the editor type integer associated with the text view, which
3694     * will be reported to an IME with {@link EditorInfo#imeOptions} when it
3695     * has focus.
3696     * @see #getImeOptions
3697     * @see android.view.inputmethod.EditorInfo
3698     * @attr ref android.R.styleable#TextView_imeOptions
3699     */
3700    public void setImeOptions(int imeOptions) {
3701        if (mInputContentType == null) {
3702            mInputContentType = new InputContentType();
3703        }
3704        mInputContentType.imeOptions = imeOptions;
3705    }
3706
3707    /**
3708     * Get the type of the IME editor.
3709     *
3710     * @see #setImeOptions(int)
3711     * @see android.view.inputmethod.EditorInfo
3712     */
3713    public int getImeOptions() {
3714        return mInputContentType != null
3715                ? mInputContentType.imeOptions : EditorInfo.IME_NULL;
3716    }
3717
3718    /**
3719     * Change the custom IME action associated with the text view, which
3720     * will be reported to an IME with {@link EditorInfo#actionLabel}
3721     * and {@link EditorInfo#actionId} when it has focus.
3722     * @see #getImeActionLabel
3723     * @see #getImeActionId
3724     * @see android.view.inputmethod.EditorInfo
3725     * @attr ref android.R.styleable#TextView_imeActionLabel
3726     * @attr ref android.R.styleable#TextView_imeActionId
3727     */
3728    public void setImeActionLabel(CharSequence label, int actionId) {
3729        if (mInputContentType == null) {
3730            mInputContentType = new InputContentType();
3731        }
3732        mInputContentType.imeActionLabel = label;
3733        mInputContentType.imeActionId = actionId;
3734    }
3735
3736    /**
3737     * Get the IME action label previous set with {@link #setImeActionLabel}.
3738     *
3739     * @see #setImeActionLabel
3740     * @see android.view.inputmethod.EditorInfo
3741     */
3742    public CharSequence getImeActionLabel() {
3743        return mInputContentType != null
3744                ? mInputContentType.imeActionLabel : null;
3745    }
3746
3747    /**
3748     * Get the IME action ID previous set with {@link #setImeActionLabel}.
3749     *
3750     * @see #setImeActionLabel
3751     * @see android.view.inputmethod.EditorInfo
3752     */
3753    public int getImeActionId() {
3754        return mInputContentType != null
3755                ? mInputContentType.imeActionId : 0;
3756    }
3757
3758    /**
3759     * Set a special listener to be called when an action is performed
3760     * on the text view.  This will be called when the enter key is pressed,
3761     * or when an action supplied to the IME is selected by the user.  Setting
3762     * this means that the normal hard key event will not insert a newline
3763     * into the text view, even if it is multi-line; holding down the ALT
3764     * modifier will, however, allow the user to insert a newline character.
3765     */
3766    public void setOnEditorActionListener(OnEditorActionListener l) {
3767        if (mInputContentType == null) {
3768            mInputContentType = new InputContentType();
3769        }
3770        mInputContentType.onEditorActionListener = l;
3771    }
3772
3773    /**
3774     * Called when an attached input method calls
3775     * {@link InputConnection#performEditorAction(int)
3776     * InputConnection.performEditorAction()}
3777     * for this text view.  The default implementation will call your action
3778     * listener supplied to {@link #setOnEditorActionListener}, or perform
3779     * a standard operation for {@link EditorInfo#IME_ACTION_NEXT
3780     * EditorInfo.IME_ACTION_NEXT}, {@link EditorInfo#IME_ACTION_PREVIOUS
3781     * EditorInfo.IME_ACTION_PREVIOUS}, or {@link EditorInfo#IME_ACTION_DONE
3782     * EditorInfo.IME_ACTION_DONE}.
3783     *
3784     * <p>For backwards compatibility, if no IME options have been set and the
3785     * text view would not normally advance focus on enter, then
3786     * the NEXT and DONE actions received here will be turned into an enter
3787     * key down/up pair to go through the normal key handling.
3788     *
3789     * @param actionCode The code of the action being performed.
3790     *
3791     * @see #setOnEditorActionListener
3792     */
3793    public void onEditorAction(int actionCode) {
3794        final InputContentType ict = mInputContentType;
3795        if (ict != null) {
3796            if (ict.onEditorActionListener != null) {
3797                if (ict.onEditorActionListener.onEditorAction(this,
3798                        actionCode, null)) {
3799                    return;
3800                }
3801            }
3802
3803            // This is the handling for some default action.
3804            // Note that for backwards compatibility we don't do this
3805            // default handling if explicit ime options have not been given,
3806            // instead turning this into the normal enter key codes that an
3807            // app may be expecting.
3808            if (actionCode == EditorInfo.IME_ACTION_NEXT) {
3809                View v = focusSearch(FOCUS_FORWARD);
3810                if (v != null) {
3811                    if (!v.requestFocus(FOCUS_FORWARD)) {
3812                        throw new IllegalStateException("focus search returned a view " +
3813                                "that wasn't able to take focus!");
3814                    }
3815                }
3816                return;
3817
3818            } else if (actionCode == EditorInfo.IME_ACTION_PREVIOUS) {
3819                View v = focusSearch(FOCUS_BACKWARD);
3820                if (v != null) {
3821                    if (!v.requestFocus(FOCUS_BACKWARD)) {
3822                        throw new IllegalStateException("focus search returned a view " +
3823                                "that wasn't able to take focus!");
3824                    }
3825                }
3826                return;
3827
3828            } else if (actionCode == EditorInfo.IME_ACTION_DONE) {
3829                InputMethodManager imm = InputMethodManager.peekInstance();
3830                if (imm != null && imm.isActive(this)) {
3831                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
3832                }
3833                return;
3834            }
3835        }
3836
3837        Handler h = getHandler();
3838        if (h != null) {
3839            long eventTime = SystemClock.uptimeMillis();
3840            h.sendMessage(h.obtainMessage(ViewRootImpl.DISPATCH_KEY_FROM_IME,
3841                    new KeyEvent(eventTime, eventTime,
3842                    KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_ENTER, 0, 0,
3843                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3844                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3845                    | KeyEvent.FLAG_EDITOR_ACTION)));
3846            h.sendMessage(h.obtainMessage(ViewRootImpl.DISPATCH_KEY_FROM_IME,
3847                    new KeyEvent(SystemClock.uptimeMillis(), eventTime,
3848                    KeyEvent.ACTION_UP, KeyEvent.KEYCODE_ENTER, 0, 0,
3849                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3850                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3851                    | KeyEvent.FLAG_EDITOR_ACTION)));
3852        }
3853    }
3854
3855    /**
3856     * Set the private content type of the text, which is the
3857     * {@link EditorInfo#privateImeOptions EditorInfo.privateImeOptions}
3858     * field that will be filled in when creating an input connection.
3859     *
3860     * @see #getPrivateImeOptions()
3861     * @see EditorInfo#privateImeOptions
3862     * @attr ref android.R.styleable#TextView_privateImeOptions
3863     */
3864    public void setPrivateImeOptions(String type) {
3865        if (mInputContentType == null) mInputContentType = new InputContentType();
3866        mInputContentType.privateImeOptions = type;
3867    }
3868
3869    /**
3870     * Get the private type of the content.
3871     *
3872     * @see #setPrivateImeOptions(String)
3873     * @see EditorInfo#privateImeOptions
3874     */
3875    public String getPrivateImeOptions() {
3876        return mInputContentType != null
3877                ? mInputContentType.privateImeOptions : null;
3878    }
3879
3880    /**
3881     * Set the extra input data of the text, which is the
3882     * {@link EditorInfo#extras TextBoxAttribute.extras}
3883     * Bundle that will be filled in when creating an input connection.  The
3884     * given integer is the resource ID of an XML resource holding an
3885     * {@link android.R.styleable#InputExtras &lt;input-extras&gt;} XML tree.
3886     *
3887     * @see #getInputExtras(boolean)
3888     * @see EditorInfo#extras
3889     * @attr ref android.R.styleable#TextView_editorExtras
3890     */
3891    public void setInputExtras(int xmlResId)
3892            throws XmlPullParserException, IOException {
3893        XmlResourceParser parser = getResources().getXml(xmlResId);
3894        if (mInputContentType == null) mInputContentType = new InputContentType();
3895        mInputContentType.extras = new Bundle();
3896        getResources().parseBundleExtras(parser, mInputContentType.extras);
3897    }
3898
3899    /**
3900     * Retrieve the input extras currently associated with the text view, which
3901     * can be viewed as well as modified.
3902     *
3903     * @param create If true, the extras will be created if they don't already
3904     * exist.  Otherwise, null will be returned if none have been created.
3905     * @see #setInputExtras(int)
3906     * @see EditorInfo#extras
3907     * @attr ref android.R.styleable#TextView_editorExtras
3908     */
3909    public Bundle getInputExtras(boolean create) {
3910        if (mInputContentType == null) {
3911            if (!create) return null;
3912            mInputContentType = new InputContentType();
3913        }
3914        if (mInputContentType.extras == null) {
3915            if (!create) return null;
3916            mInputContentType.extras = new Bundle();
3917        }
3918        return mInputContentType.extras;
3919    }
3920
3921    /**
3922     * Returns the error message that was set to be displayed with
3923     * {@link #setError}, or <code>null</code> if no error was set
3924     * or if it the error was cleared by the widget after user input.
3925     */
3926    public CharSequence getError() {
3927        return mError;
3928    }
3929
3930    /**
3931     * Sets the right-hand compound drawable of the TextView to the "error"
3932     * icon and sets an error message that will be displayed in a popup when
3933     * the TextView has focus.  The icon and error message will be reset to
3934     * null when any key events cause changes to the TextView's text.  If the
3935     * <code>error</code> is <code>null</code>, the error message and icon
3936     * will be cleared.
3937     */
3938    @android.view.RemotableViewMethod
3939    public void setError(CharSequence error) {
3940        if (error == null) {
3941            setError(null, null);
3942        } else {
3943            Drawable dr = getContext().getResources().
3944                getDrawable(com.android.internal.R.drawable.indicator_input_error);
3945
3946            dr.setBounds(0, 0, dr.getIntrinsicWidth(), dr.getIntrinsicHeight());
3947            setError(error, dr);
3948        }
3949    }
3950
3951    /**
3952     * Sets the right-hand compound drawable of the TextView to the specified
3953     * icon and sets an error message that will be displayed in a popup when
3954     * the TextView has focus.  The icon and error message will be reset to
3955     * null when any key events cause changes to the TextView's text.  The
3956     * drawable must already have had {@link Drawable#setBounds} set on it.
3957     * If the <code>error</code> is <code>null</code>, the error message will
3958     * be cleared (and you should provide a <code>null</code> icon as well).
3959     */
3960    public void setError(CharSequence error, Drawable icon) {
3961        error = TextUtils.stringOrSpannedString(error);
3962
3963        mError = error;
3964        mErrorWasChanged = true;
3965        final Drawables dr = mDrawables;
3966        if (dr != null) {
3967            switch (getResolvedLayoutDirection()) {
3968                default:
3969                case LAYOUT_DIRECTION_LTR:
3970                    setCompoundDrawables(dr.mDrawableLeft, dr.mDrawableTop, icon,
3971                            dr.mDrawableBottom);
3972                    break;
3973                case LAYOUT_DIRECTION_RTL:
3974                    setCompoundDrawables(icon, dr.mDrawableTop, dr.mDrawableRight,
3975                            dr.mDrawableBottom);
3976                    break;
3977            }
3978        } else {
3979            setCompoundDrawables(null, null, icon, null);
3980        }
3981
3982        if (error == null) {
3983            if (mPopup != null) {
3984                if (mPopup.isShowing()) {
3985                    mPopup.dismiss();
3986                }
3987
3988                mPopup = null;
3989            }
3990        } else {
3991            if (isFocused()) {
3992                showError();
3993            }
3994        }
3995    }
3996
3997    private void showError() {
3998        if (getWindowToken() == null) {
3999            mShowErrorAfterAttach = true;
4000            return;
4001        }
4002
4003        if (mPopup == null) {
4004            LayoutInflater inflater = LayoutInflater.from(getContext());
4005            final TextView err = (TextView) inflater.inflate(
4006                    com.android.internal.R.layout.textview_hint, null);
4007
4008            final float scale = getResources().getDisplayMetrics().density;
4009            mPopup = new ErrorPopup(err, (int) (200 * scale + 0.5f), (int) (50 * scale + 0.5f));
4010            mPopup.setFocusable(false);
4011            // The user is entering text, so the input method is needed.  We
4012            // don't want the popup to be displayed on top of it.
4013            mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);
4014        }
4015
4016        TextView tv = (TextView) mPopup.getContentView();
4017        chooseSize(mPopup, mError, tv);
4018        tv.setText(mError);
4019
4020        mPopup.showAsDropDown(this, getErrorX(), getErrorY());
4021        mPopup.fixDirection(mPopup.isAboveAnchor());
4022    }
4023
4024    private static class ErrorPopup extends PopupWindow {
4025        private boolean mAbove = false;
4026        private final TextView mView;
4027        private int mPopupInlineErrorBackgroundId = 0;
4028        private int mPopupInlineErrorAboveBackgroundId = 0;
4029
4030        ErrorPopup(TextView v, int width, int height) {
4031            super(v, width, height);
4032            mView = v;
4033            // Make sure the TextView has a background set as it will be used the first time it is
4034            // shown and positionned. Initialized with below background, which should have
4035            // dimensions identical to the above version for this to work (and is more likely).
4036            mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
4037                    com.android.internal.R.styleable.Theme_errorMessageBackground);
4038            mView.setBackgroundResource(mPopupInlineErrorBackgroundId);
4039        }
4040
4041        void fixDirection(boolean above) {
4042            mAbove = above;
4043
4044            if (above) {
4045                mPopupInlineErrorAboveBackgroundId =
4046                    getResourceId(mPopupInlineErrorAboveBackgroundId,
4047                            com.android.internal.R.styleable.Theme_errorMessageAboveBackground);
4048            } else {
4049                mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
4050                        com.android.internal.R.styleable.Theme_errorMessageBackground);
4051            }
4052
4053            mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId :
4054                mPopupInlineErrorBackgroundId);
4055        }
4056
4057        private int getResourceId(int currentId, int index) {
4058            if (currentId == 0) {
4059                TypedArray styledAttributes = mView.getContext().obtainStyledAttributes(
4060                        R.styleable.Theme);
4061                currentId = styledAttributes.getResourceId(index, 0);
4062                styledAttributes.recycle();
4063            }
4064            return currentId;
4065        }
4066
4067        @Override
4068        public void update(int x, int y, int w, int h, boolean force) {
4069            super.update(x, y, w, h, force);
4070
4071            boolean above = isAboveAnchor();
4072            if (above != mAbove) {
4073                fixDirection(above);
4074            }
4075        }
4076    }
4077
4078    /**
4079     * Returns the Y offset to make the pointy top of the error point
4080     * at the middle of the error icon.
4081     */
4082    private int getErrorX() {
4083        /*
4084         * The "25" is the distance between the point and the right edge
4085         * of the background
4086         */
4087        final float scale = getResources().getDisplayMetrics().density;
4088
4089        final Drawables dr = mDrawables;
4090        return getWidth() - mPopup.getWidth() - getPaddingRight() -
4091                (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f);
4092    }
4093
4094    /**
4095     * Returns the Y offset to make the pointy top of the error point
4096     * at the bottom of the error icon.
4097     */
4098    private int getErrorY() {
4099        /*
4100         * Compound, not extended, because the icon is not clipped
4101         * if the text height is smaller.
4102         */
4103        final int compoundPaddingTop = getCompoundPaddingTop();
4104        int vspace = mBottom - mTop - getCompoundPaddingBottom() - compoundPaddingTop;
4105
4106        final Drawables dr = mDrawables;
4107        int icontop = compoundPaddingTop +
4108                (vspace - (dr != null ? dr.mDrawableHeightRight : 0)) / 2;
4109
4110        /*
4111         * The "2" is the distance between the point and the top edge
4112         * of the background.
4113         */
4114        final float scale = getResources().getDisplayMetrics().density;
4115        return icontop + (dr != null ? dr.mDrawableHeightRight : 0) - getHeight() -
4116                (int) (2 * scale + 0.5f);
4117    }
4118
4119    private void hideError() {
4120        if (mPopup != null) {
4121            if (mPopup.isShowing()) {
4122                mPopup.dismiss();
4123            }
4124        }
4125
4126        mShowErrorAfterAttach = false;
4127    }
4128
4129    private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) {
4130        int wid = tv.getPaddingLeft() + tv.getPaddingRight();
4131        int ht = tv.getPaddingTop() + tv.getPaddingBottom();
4132
4133        int defaultWidthInPixels = getResources().getDimensionPixelSize(
4134                com.android.internal.R.dimen.textview_error_popup_default_width);
4135        Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels,
4136                                    Layout.Alignment.ALIGN_NORMAL, 1, 0, true);
4137        float max = 0;
4138        for (int i = 0; i < l.getLineCount(); i++) {
4139            max = Math.max(max, l.getLineWidth(i));
4140        }
4141
4142        /*
4143         * Now set the popup size to be big enough for the text plus the border capped
4144         * to DEFAULT_MAX_POPUP_WIDTH
4145         */
4146        pop.setWidth(wid + (int) Math.ceil(max));
4147        pop.setHeight(ht + l.getHeight());
4148    }
4149
4150
4151    @Override
4152    protected boolean setFrame(int l, int t, int r, int b) {
4153        boolean result = super.setFrame(l, t, r, b);
4154
4155        if (mPopup != null) {
4156            TextView tv = (TextView) mPopup.getContentView();
4157            chooseSize(mPopup, mError, tv);
4158            mPopup.update(this, getErrorX(), getErrorY(),
4159                          mPopup.getWidth(), mPopup.getHeight());
4160        }
4161
4162        restartMarqueeIfNeeded();
4163
4164        return result;
4165    }
4166
4167    private void restartMarqueeIfNeeded() {
4168        if (mRestartMarquee && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
4169            mRestartMarquee = false;
4170            startMarquee();
4171        }
4172    }
4173
4174    /**
4175     * Sets the list of input filters that will be used if the buffer is
4176     * Editable.  Has no effect otherwise.
4177     *
4178     * @attr ref android.R.styleable#TextView_maxLength
4179     */
4180    public void setFilters(InputFilter[] filters) {
4181        if (filters == null) {
4182            throw new IllegalArgumentException();
4183        }
4184
4185        mFilters = filters;
4186
4187        if (mText instanceof Editable) {
4188            setFilters((Editable) mText, filters);
4189        }
4190    }
4191
4192    /**
4193     * Sets the list of input filters on the specified Editable,
4194     * and includes mInput in the list if it is an InputFilter.
4195     */
4196    private void setFilters(Editable e, InputFilter[] filters) {
4197        if (mInput instanceof InputFilter) {
4198            InputFilter[] nf = new InputFilter[filters.length + 1];
4199
4200            System.arraycopy(filters, 0, nf, 0, filters.length);
4201            nf[filters.length] = (InputFilter) mInput;
4202
4203            e.setFilters(nf);
4204        } else {
4205            e.setFilters(filters);
4206        }
4207    }
4208
4209    /**
4210     * Returns the current list of input filters.
4211     */
4212    public InputFilter[] getFilters() {
4213        return mFilters;
4214    }
4215
4216    /////////////////////////////////////////////////////////////////////////
4217
4218    private int getVerticalOffset(boolean forceNormal) {
4219        int voffset = 0;
4220        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
4221
4222        Layout l = mLayout;
4223        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
4224            l = mHintLayout;
4225        }
4226
4227        if (gravity != Gravity.TOP) {
4228            int boxht;
4229
4230            if (l == mHintLayout) {
4231                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
4232                        getCompoundPaddingBottom();
4233            } else {
4234                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
4235                        getExtendedPaddingBottom();
4236            }
4237            int textht = l.getHeight();
4238
4239            if (textht < boxht) {
4240                if (gravity == Gravity.BOTTOM)
4241                    voffset = boxht - textht;
4242                else // (gravity == Gravity.CENTER_VERTICAL)
4243                    voffset = (boxht - textht) >> 1;
4244            }
4245        }
4246        return voffset;
4247    }
4248
4249    private int getBottomVerticalOffset(boolean forceNormal) {
4250        int voffset = 0;
4251        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
4252
4253        Layout l = mLayout;
4254        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
4255            l = mHintLayout;
4256        }
4257
4258        if (gravity != Gravity.BOTTOM) {
4259            int boxht;
4260
4261            if (l == mHintLayout) {
4262                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
4263                        getCompoundPaddingBottom();
4264            } else {
4265                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
4266                        getExtendedPaddingBottom();
4267            }
4268            int textht = l.getHeight();
4269
4270            if (textht < boxht) {
4271                if (gravity == Gravity.TOP)
4272                    voffset = boxht - textht;
4273                else // (gravity == Gravity.CENTER_VERTICAL)
4274                    voffset = (boxht - textht) >> 1;
4275            }
4276        }
4277        return voffset;
4278    }
4279
4280    private void invalidateCursorPath() {
4281        if (mHighlightPathBogus) {
4282            invalidateCursor();
4283        } else {
4284            final int horizontalPadding = getCompoundPaddingLeft();
4285            final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
4286
4287            if (mCursorCount == 0) {
4288                synchronized (sTempRect) {
4289                    /*
4290                     * The reason for this concern about the thickness of the
4291                     * cursor and doing the floor/ceil on the coordinates is that
4292                     * some EditTexts (notably textfields in the Browser) have
4293                     * anti-aliased text where not all the characters are
4294                     * necessarily at integer-multiple locations.  This should
4295                     * make sure the entire cursor gets invalidated instead of
4296                     * sometimes missing half a pixel.
4297                     */
4298                    float thick = FloatMath.ceil(mTextPaint.getStrokeWidth());
4299                    if (thick < 1.0f) {
4300                        thick = 1.0f;
4301                    }
4302
4303                    thick /= 2.0f;
4304
4305                    mHighlightPath.computeBounds(sTempRect, false);
4306
4307                    invalidate((int) FloatMath.floor(horizontalPadding + sTempRect.left - thick),
4308                            (int) FloatMath.floor(verticalPadding + sTempRect.top - thick),
4309                            (int) FloatMath.ceil(horizontalPadding + sTempRect.right + thick),
4310                            (int) FloatMath.ceil(verticalPadding + sTempRect.bottom + thick));
4311                }
4312            } else {
4313                for (int i = 0; i < mCursorCount; i++) {
4314                    Rect bounds = mCursorDrawable[i].getBounds();
4315                    invalidate(bounds.left + horizontalPadding, bounds.top + verticalPadding,
4316                            bounds.right + horizontalPadding, bounds.bottom + verticalPadding);
4317                }
4318            }
4319        }
4320    }
4321
4322    private void invalidateCursor() {
4323        int where = getSelectionEnd();
4324
4325        invalidateCursor(where, where, where);
4326    }
4327
4328    private void invalidateCursor(int a, int b, int c) {
4329        if (a >= 0 || b >= 0 || c >= 0) {
4330            int start = Math.min(Math.min(a, b), c);
4331            int end = Math.max(Math.max(a, b), c);
4332            invalidateRegion(start, end);
4333        }
4334    }
4335
4336    /**
4337     * Invalidates the region of text enclosed between the start and end text offsets.
4338     *
4339     * @hide
4340     */
4341    void invalidateRegion(int start, int end) {
4342        if (mLayout == null) {
4343            invalidate();
4344        } else {
4345                int lineStart = mLayout.getLineForOffset(start);
4346                int top = mLayout.getLineTop(lineStart);
4347
4348                // This is ridiculous, but the descent from the line above
4349                // can hang down into the line we really want to redraw,
4350                // so we have to invalidate part of the line above to make
4351                // sure everything that needs to be redrawn really is.
4352                // (But not the whole line above, because that would cause
4353                // the same problem with the descenders on the line above it!)
4354                if (lineStart > 0) {
4355                    top -= mLayout.getLineDescent(lineStart - 1);
4356                }
4357
4358                int lineEnd;
4359
4360                if (start == end)
4361                    lineEnd = lineStart;
4362                else
4363                    lineEnd = mLayout.getLineForOffset(end);
4364
4365                int bottom = mLayout.getLineBottom(lineEnd);
4366
4367                final int compoundPaddingLeft = getCompoundPaddingLeft();
4368                final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
4369
4370                int left, right;
4371                if (lineStart == lineEnd) {
4372                    left = (int) mLayout.getPrimaryHorizontal(start);
4373                    right = (int) (mLayout.getPrimaryHorizontal(end) + 1.0);
4374                    left += compoundPaddingLeft;
4375                    right += compoundPaddingLeft;
4376                } else {
4377                    // Rectangle bounding box when the region spans several lines
4378                    left = compoundPaddingLeft;
4379                    right = getWidth() - getCompoundPaddingRight();
4380                }
4381
4382                invalidate(mScrollX + left, verticalPadding + top,
4383                        mScrollX + right, verticalPadding + bottom);
4384        }
4385    }
4386
4387    private void registerForPreDraw() {
4388        final ViewTreeObserver observer = getViewTreeObserver();
4389
4390        if (mPreDrawState == PREDRAW_NOT_REGISTERED) {
4391            observer.addOnPreDrawListener(this);
4392            mPreDrawState = PREDRAW_PENDING;
4393        } else if (mPreDrawState == PREDRAW_DONE) {
4394            mPreDrawState = PREDRAW_PENDING;
4395        }
4396
4397        // else state is PREDRAW_PENDING, so keep waiting.
4398    }
4399
4400    /**
4401     * {@inheritDoc}
4402     */
4403    public boolean onPreDraw() {
4404        if (mPreDrawState != PREDRAW_PENDING) {
4405            return true;
4406        }
4407
4408        if (mLayout == null) {
4409            assumeLayout();
4410        }
4411
4412        boolean changed = false;
4413
4414        if (mMovement != null) {
4415            /* This code also provides auto-scrolling when a cursor is moved using a
4416             * CursorController (insertion point or selection limits).
4417             * For selection, ensure start or end is visible depending on controller's state.
4418             */
4419            int curs = getSelectionEnd();
4420            // Do not create the controller if it is not already created.
4421            if (mSelectionModifierCursorController != null &&
4422                    mSelectionModifierCursorController.isSelectionStartDragged()) {
4423                curs = getSelectionStart();
4424            }
4425
4426            /*
4427             * TODO: This should really only keep the end in view if
4428             * it already was before the text changed.  I'm not sure
4429             * of a good way to tell from here if it was.
4430             */
4431            if (curs < 0 &&
4432                  (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
4433                curs = mText.length();
4434            }
4435
4436            if (curs >= 0) {
4437                changed = bringPointIntoView(curs);
4438            }
4439        } else {
4440            changed = bringTextIntoView();
4441        }
4442
4443        // This has to be checked here since:
4444        // - onFocusChanged cannot start it when focus is given to a view with selected text (after
4445        //   a screen rotation) since layout is not yet initialized at that point.
4446        if (mCreatedWithASelection) {
4447            startSelectionActionMode();
4448            mCreatedWithASelection = false;
4449        }
4450
4451        // Phone specific code (there is no ExtractEditText on tablets).
4452        // ExtractEditText does not call onFocus when it is displayed, and mHasSelectionOnFocus can
4453        // not be set. Do the test here instead.
4454        if (this instanceof ExtractEditText && hasSelection()) {
4455            startSelectionActionMode();
4456        }
4457
4458        mPreDrawState = PREDRAW_DONE;
4459        return !changed;
4460    }
4461
4462    @Override
4463    protected void onAttachedToWindow() {
4464        super.onAttachedToWindow();
4465
4466        mTemporaryDetach = false;
4467
4468        if (mShowErrorAfterAttach) {
4469            showError();
4470            mShowErrorAfterAttach = false;
4471        }
4472
4473        final ViewTreeObserver observer = getViewTreeObserver();
4474        // No need to create the controller.
4475        // The get method will add the listener on controller creation.
4476        if (mInsertionPointCursorController != null) {
4477            observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
4478        }
4479        if (mSelectionModifierCursorController != null) {
4480            observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
4481        }
4482
4483        // Resolve drawables as the layout direction has been resolved
4484        resolveDrawables();
4485
4486        updateSpellCheckSpans(0, mText.length());
4487    }
4488
4489    @Override
4490    protected void onDetachedFromWindow() {
4491        super.onDetachedFromWindow();
4492
4493        final ViewTreeObserver observer = getViewTreeObserver();
4494        if (mPreDrawState != PREDRAW_NOT_REGISTERED) {
4495            observer.removeOnPreDrawListener(this);
4496            mPreDrawState = PREDRAW_NOT_REGISTERED;
4497        }
4498
4499        if (mError != null) {
4500            hideError();
4501        }
4502
4503        if (mBlink != null) {
4504            mBlink.removeCallbacks(mBlink);
4505        }
4506
4507        if (mInsertionPointCursorController != null) {
4508            mInsertionPointCursorController.onDetached();
4509        }
4510
4511        if (mSelectionModifierCursorController != null) {
4512            mSelectionModifierCursorController.onDetached();
4513        }
4514
4515        hideControllers();
4516
4517        resetResolvedDrawables();
4518
4519        if (mSpellChecker != null) {
4520            mSpellChecker.closeSession();
4521            // Forces the creation of a new SpellChecker next time this window is created.
4522            // Will handle the cases where the settings has been changed in the meantime.
4523            mSpellChecker = null;
4524        }
4525    }
4526
4527    @Override
4528    protected boolean isPaddingOffsetRequired() {
4529        return mShadowRadius != 0 || mDrawables != null;
4530    }
4531
4532    @Override
4533    protected int getLeftPaddingOffset() {
4534        return getCompoundPaddingLeft() - mPaddingLeft +
4535                (int) Math.min(0, mShadowDx - mShadowRadius);
4536    }
4537
4538    @Override
4539    protected int getTopPaddingOffset() {
4540        return (int) Math.min(0, mShadowDy - mShadowRadius);
4541    }
4542
4543    @Override
4544    protected int getBottomPaddingOffset() {
4545        return (int) Math.max(0, mShadowDy + mShadowRadius);
4546    }
4547
4548    @Override
4549    protected int getRightPaddingOffset() {
4550        return -(getCompoundPaddingRight() - mPaddingRight) +
4551                (int) Math.max(0, mShadowDx + mShadowRadius);
4552    }
4553
4554    @Override
4555    protected boolean verifyDrawable(Drawable who) {
4556        final boolean verified = super.verifyDrawable(who);
4557        if (!verified && mDrawables != null) {
4558            return who == mDrawables.mDrawableLeft || who == mDrawables.mDrawableTop ||
4559                    who == mDrawables.mDrawableRight || who == mDrawables.mDrawableBottom ||
4560                    who == mDrawables.mDrawableStart || who == mDrawables.mDrawableEnd;
4561        }
4562        return verified;
4563    }
4564
4565    @Override
4566    public void jumpDrawablesToCurrentState() {
4567        super.jumpDrawablesToCurrentState();
4568        if (mDrawables != null) {
4569            if (mDrawables.mDrawableLeft != null) {
4570                mDrawables.mDrawableLeft.jumpToCurrentState();
4571            }
4572            if (mDrawables.mDrawableTop != null) {
4573                mDrawables.mDrawableTop.jumpToCurrentState();
4574            }
4575            if (mDrawables.mDrawableRight != null) {
4576                mDrawables.mDrawableRight.jumpToCurrentState();
4577            }
4578            if (mDrawables.mDrawableBottom != null) {
4579                mDrawables.mDrawableBottom.jumpToCurrentState();
4580            }
4581            if (mDrawables.mDrawableStart != null) {
4582                mDrawables.mDrawableStart.jumpToCurrentState();
4583            }
4584            if (mDrawables.mDrawableEnd != null) {
4585                mDrawables.mDrawableEnd.jumpToCurrentState();
4586            }
4587        }
4588    }
4589
4590    @Override
4591    public void invalidateDrawable(Drawable drawable) {
4592        if (verifyDrawable(drawable)) {
4593            final Rect dirty = drawable.getBounds();
4594            int scrollX = mScrollX;
4595            int scrollY = mScrollY;
4596
4597            // IMPORTANT: The coordinates below are based on the coordinates computed
4598            // for each compound drawable in onDraw(). Make sure to update each section
4599            // accordingly.
4600            final TextView.Drawables drawables = mDrawables;
4601            if (drawables != null) {
4602                if (drawable == drawables.mDrawableLeft) {
4603                    final int compoundPaddingTop = getCompoundPaddingTop();
4604                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4605                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4606
4607                    scrollX += mPaddingLeft;
4608                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightLeft) / 2;
4609                } else if (drawable == drawables.mDrawableRight) {
4610                    final int compoundPaddingTop = getCompoundPaddingTop();
4611                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4612                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4613
4614                    scrollX += (mRight - mLeft - mPaddingRight - drawables.mDrawableSizeRight);
4615                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightRight) / 2;
4616                } else if (drawable == drawables.mDrawableTop) {
4617                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4618                    final int compoundPaddingRight = getCompoundPaddingRight();
4619                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4620
4621                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthTop) / 2;
4622                    scrollY += mPaddingTop;
4623                } else if (drawable == drawables.mDrawableBottom) {
4624                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4625                    final int compoundPaddingRight = getCompoundPaddingRight();
4626                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4627
4628                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthBottom) / 2;
4629                    scrollY += (mBottom - mTop - mPaddingBottom - drawables.mDrawableSizeBottom);
4630                }
4631            }
4632
4633            invalidate(dirty.left + scrollX, dirty.top + scrollY,
4634                    dirty.right + scrollX, dirty.bottom + scrollY);
4635        }
4636    }
4637
4638    /**
4639     * @hide
4640     */
4641    @Override
4642    public int getResolvedLayoutDirection(Drawable who) {
4643        if (who == null) return View.LAYOUT_DIRECTION_LTR;
4644        if (mDrawables != null) {
4645            final Drawables drawables = mDrawables;
4646            if (who == drawables.mDrawableLeft || who == drawables.mDrawableRight ||
4647                who == drawables.mDrawableTop || who == drawables.mDrawableBottom ||
4648                who == drawables.mDrawableStart || who == drawables.mDrawableEnd) {
4649                return getResolvedLayoutDirection();
4650            }
4651        }
4652        return super.getResolvedLayoutDirection(who);
4653    }
4654
4655    @Override
4656    protected boolean onSetAlpha(int alpha) {
4657        // Alpha is supported if and only if the drawing can be done in one pass.
4658        // TODO text with spans with a background color currently do not respect this alpha.
4659        if (getBackground() == null) {
4660            mCurrentAlpha = alpha;
4661            final Drawables dr = mDrawables;
4662            if (dr != null) {
4663                if (dr.mDrawableLeft != null) dr.mDrawableLeft.mutate().setAlpha(alpha);
4664                if (dr.mDrawableTop != null) dr.mDrawableTop.mutate().setAlpha(alpha);
4665                if (dr.mDrawableRight != null) dr.mDrawableRight.mutate().setAlpha(alpha);
4666                if (dr.mDrawableBottom != null) dr.mDrawableBottom.mutate().setAlpha(alpha);
4667                if (dr.mDrawableStart != null) dr.mDrawableStart.mutate().setAlpha(alpha);
4668                if (dr.mDrawableEnd != null) dr.mDrawableEnd.mutate().setAlpha(alpha);
4669            }
4670            return true;
4671        }
4672
4673        mCurrentAlpha = 255;
4674        return false;
4675    }
4676
4677    /**
4678     * When a TextView is used to display a useful piece of information to the user (such as a
4679     * contact's address), it should be made selectable, so that the user can select and copy this
4680     * content.
4681     *
4682     * Use {@link #setTextIsSelectable(boolean)} or the
4683     * {@link android.R.styleable#TextView_textIsSelectable} XML attribute to make this TextView
4684     * selectable (text is not selectable by default).
4685     *
4686     * Note that this method simply returns the state of this flag. Although this flag has to be set
4687     * in order to select text in non-editable TextView, the content of an {@link EditText} can
4688     * always be selected, independently of the value of this flag.
4689     *
4690     * @return True if the text displayed in this TextView can be selected by the user.
4691     *
4692     * @attr ref android.R.styleable#TextView_textIsSelectable
4693     */
4694    public boolean isTextSelectable() {
4695        return mTextIsSelectable;
4696    }
4697
4698    /**
4699     * Sets whether or not (default) the content of this view is selectable by the user.
4700     *
4701     * Note that this methods affect the {@link #setFocusable(boolean)},
4702     * {@link #setFocusableInTouchMode(boolean)} {@link #setClickable(boolean)} and
4703     * {@link #setLongClickable(boolean)} states and you may want to restore these if they were
4704     * customized.
4705     *
4706     * See {@link #isTextSelectable} for details.
4707     *
4708     * @param selectable Whether or not the content of this TextView should be selectable.
4709     */
4710    public void setTextIsSelectable(boolean selectable) {
4711        if (mTextIsSelectable == selectable) return;
4712
4713        mTextIsSelectable = selectable;
4714
4715        setFocusableInTouchMode(selectable);
4716        setFocusable(selectable);
4717        setClickable(selectable);
4718        setLongClickable(selectable);
4719
4720        // mInputType is already EditorInfo.TYPE_NULL and mInput is null;
4721
4722        setMovementMethod(selectable ? ArrowKeyMovementMethod.getInstance() : null);
4723        setText(getText(), selectable ? BufferType.SPANNABLE : BufferType.NORMAL);
4724
4725        // Called by setText above, but safer in case of future code changes
4726        prepareCursorControllers();
4727    }
4728
4729    @Override
4730    protected int[] onCreateDrawableState(int extraSpace) {
4731        final int[] drawableState;
4732
4733        if (mSingleLine) {
4734            drawableState = super.onCreateDrawableState(extraSpace);
4735        } else {
4736            drawableState = super.onCreateDrawableState(extraSpace + 1);
4737            mergeDrawableStates(drawableState, MULTILINE_STATE_SET);
4738        }
4739
4740        if (mTextIsSelectable) {
4741            // Disable pressed state, which was introduced when TextView was made clickable.
4742            // Prevents text color change.
4743            // setClickable(false) would have a similar effect, but it also disables focus changes
4744            // and long press actions, which are both needed by text selection.
4745            final int length = drawableState.length;
4746            for (int i = 0; i < length; i++) {
4747                if (drawableState[i] == R.attr.state_pressed) {
4748                    final int[] nonPressedState = new int[length - 1];
4749                    System.arraycopy(drawableState, 0, nonPressedState, 0, i);
4750                    System.arraycopy(drawableState, i + 1, nonPressedState, i, length - i - 1);
4751                    return nonPressedState;
4752                }
4753            }
4754        }
4755
4756        return drawableState;
4757    }
4758
4759    @Override
4760    protected void onDraw(Canvas canvas) {
4761        if (mPreDrawState == PREDRAW_DONE) {
4762            final ViewTreeObserver observer = getViewTreeObserver();
4763            observer.removeOnPreDrawListener(this);
4764            mPreDrawState = PREDRAW_NOT_REGISTERED;
4765        }
4766
4767        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return;
4768
4769        restartMarqueeIfNeeded();
4770
4771        // Draw the background for this view
4772        super.onDraw(canvas);
4773
4774        final int compoundPaddingLeft = getCompoundPaddingLeft();
4775        final int compoundPaddingTop = getCompoundPaddingTop();
4776        final int compoundPaddingRight = getCompoundPaddingRight();
4777        final int compoundPaddingBottom = getCompoundPaddingBottom();
4778        final int scrollX = mScrollX;
4779        final int scrollY = mScrollY;
4780        final int right = mRight;
4781        final int left = mLeft;
4782        final int bottom = mBottom;
4783        final int top = mTop;
4784
4785        final Drawables dr = mDrawables;
4786        if (dr != null) {
4787            /*
4788             * Compound, not extended, because the icon is not clipped
4789             * if the text height is smaller.
4790             */
4791
4792            int vspace = bottom - top - compoundPaddingBottom - compoundPaddingTop;
4793            int hspace = right - left - compoundPaddingRight - compoundPaddingLeft;
4794
4795            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4796            // Make sure to update invalidateDrawable() when changing this code.
4797            if (dr.mDrawableLeft != null) {
4798                canvas.save();
4799                canvas.translate(scrollX + mPaddingLeft,
4800                                 scrollY + compoundPaddingTop +
4801                                 (vspace - dr.mDrawableHeightLeft) / 2);
4802                dr.mDrawableLeft.draw(canvas);
4803                canvas.restore();
4804            }
4805
4806            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4807            // Make sure to update invalidateDrawable() when changing this code.
4808            if (dr.mDrawableRight != null) {
4809                canvas.save();
4810                canvas.translate(scrollX + right - left - mPaddingRight - dr.mDrawableSizeRight,
4811                         scrollY + compoundPaddingTop + (vspace - dr.mDrawableHeightRight) / 2);
4812                dr.mDrawableRight.draw(canvas);
4813                canvas.restore();
4814            }
4815
4816            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4817            // Make sure to update invalidateDrawable() when changing this code.
4818            if (dr.mDrawableTop != null) {
4819                canvas.save();
4820                canvas.translate(scrollX + compoundPaddingLeft + (hspace - dr.mDrawableWidthTop) / 2,
4821                        scrollY + mPaddingTop);
4822                dr.mDrawableTop.draw(canvas);
4823                canvas.restore();
4824            }
4825
4826            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4827            // Make sure to update invalidateDrawable() when changing this code.
4828            if (dr.mDrawableBottom != null) {
4829                canvas.save();
4830                canvas.translate(scrollX + compoundPaddingLeft +
4831                        (hspace - dr.mDrawableWidthBottom) / 2,
4832                         scrollY + bottom - top - mPaddingBottom - dr.mDrawableSizeBottom);
4833                dr.mDrawableBottom.draw(canvas);
4834                canvas.restore();
4835            }
4836        }
4837
4838        int color = mCurTextColor;
4839
4840        if (mLayout == null) {
4841            assumeLayout();
4842        }
4843
4844        Layout layout = mLayout;
4845        int cursorcolor = color;
4846
4847        if (mHint != null && mText.length() == 0) {
4848            if (mHintTextColor != null) {
4849                color = mCurHintTextColor;
4850            }
4851
4852            layout = mHintLayout;
4853        }
4854
4855        mTextPaint.setColor(color);
4856        if (mCurrentAlpha != 255) {
4857            // If set, the alpha will override the color's alpha. Multiply the alphas.
4858            mTextPaint.setAlpha((mCurrentAlpha * Color.alpha(color)) / 255);
4859        }
4860        mTextPaint.drawableState = getDrawableState();
4861
4862        canvas.save();
4863        /*  Would be faster if we didn't have to do this. Can we chop the
4864            (displayable) text so that we don't need to do this ever?
4865        */
4866
4867        int extendedPaddingTop = getExtendedPaddingTop();
4868        int extendedPaddingBottom = getExtendedPaddingBottom();
4869
4870        float clipLeft = compoundPaddingLeft + scrollX;
4871        float clipTop = extendedPaddingTop + scrollY;
4872        float clipRight = right - left - compoundPaddingRight + scrollX;
4873        float clipBottom = bottom - top - extendedPaddingBottom + scrollY;
4874
4875        if (mShadowRadius != 0) {
4876            clipLeft += Math.min(0, mShadowDx - mShadowRadius);
4877            clipRight += Math.max(0, mShadowDx + mShadowRadius);
4878
4879            clipTop += Math.min(0, mShadowDy - mShadowRadius);
4880            clipBottom += Math.max(0, mShadowDy + mShadowRadius);
4881        }
4882
4883        canvas.clipRect(clipLeft, clipTop, clipRight, clipBottom);
4884
4885        int voffsetText = 0;
4886        int voffsetCursor = 0;
4887
4888        // translate in by our padding
4889        {
4890            /* shortcircuit calling getVerticaOffset() */
4891            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4892                voffsetText = getVerticalOffset(false);
4893                voffsetCursor = getVerticalOffset(true);
4894            }
4895            canvas.translate(compoundPaddingLeft, extendedPaddingTop + voffsetText);
4896        }
4897
4898        final int layoutDirection = getResolvedLayoutDirection();
4899        final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
4900        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
4901                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
4902            if (!mSingleLine && getLineCount() == 1 && canMarquee() &&
4903                    (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) != Gravity.LEFT) {
4904                canvas.translate(mLayout.getLineRight(0) - (mRight - mLeft -
4905                        getCompoundPaddingLeft() - getCompoundPaddingRight()), 0.0f);
4906            }
4907
4908            if (mMarquee != null && mMarquee.isRunning()) {
4909                canvas.translate(-mMarquee.mScroll, 0.0f);
4910            }
4911        }
4912
4913        Path highlight = null;
4914        int selStart = -1, selEnd = -1;
4915        boolean drawCursor = false;
4916
4917        //  If there is no movement method, then there can be no selection.
4918        //  Check that first and attempt to skip everything having to do with
4919        //  the cursor.
4920        //  XXX This is not strictly true -- a program could set the
4921        //  selection manually if it really wanted to.
4922        if (mMovement != null && (isFocused() || isPressed())) {
4923            selStart = getSelectionStart();
4924            selEnd = getSelectionEnd();
4925
4926            if (selStart >= 0) {
4927                if (mHighlightPath == null) mHighlightPath = new Path();
4928
4929                if (selStart == selEnd) {
4930                    if (isCursorVisible() &&
4931                            (SystemClock.uptimeMillis() - mShowCursor) % (2 * BLINK) < BLINK) {
4932                        if (mHighlightPathBogus) {
4933                            mHighlightPath.reset();
4934                            mLayout.getCursorPath(selStart, mHighlightPath, mText);
4935                            updateCursorsPositions();
4936                            mHighlightPathBogus = false;
4937                        }
4938
4939                        // XXX should pass to skin instead of drawing directly
4940                        mHighlightPaint.setColor(cursorcolor);
4941                        if (mCurrentAlpha != 255) {
4942                            mHighlightPaint.setAlpha(
4943                                    (mCurrentAlpha * Color.alpha(cursorcolor)) / 255);
4944                        }
4945                        mHighlightPaint.setStyle(Paint.Style.STROKE);
4946                        highlight = mHighlightPath;
4947                        drawCursor = mCursorCount > 0;
4948                    }
4949                } else if (textCanBeSelected()) {
4950                    if (mHighlightPathBogus) {
4951                        mHighlightPath.reset();
4952                        mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
4953                        mHighlightPathBogus = false;
4954                    }
4955
4956                    // XXX should pass to skin instead of drawing directly
4957                    mHighlightPaint.setColor(mHighlightColor);
4958                    if (mCurrentAlpha != 255) {
4959                        mHighlightPaint.setAlpha(
4960                                (mCurrentAlpha * Color.alpha(mHighlightColor)) / 255);
4961                    }
4962                    mHighlightPaint.setStyle(Paint.Style.FILL);
4963
4964                    highlight = mHighlightPath;
4965                }
4966            }
4967        }
4968
4969        /*  Comment out until we decide what to do about animations
4970        boolean isLinearTextOn = false;
4971        if (currentTransformation != null) {
4972            isLinearTextOn = mTextPaint.isLinearTextOn();
4973            Matrix m = currentTransformation.getMatrix();
4974            if (!m.isIdentity()) {
4975                // mTextPaint.setLinearTextOn(true);
4976            }
4977        }
4978        */
4979
4980        final InputMethodState ims = mInputMethodState;
4981        final int cursorOffsetVertical = voffsetCursor - voffsetText;
4982        if (ims != null && ims.mBatchEditNesting == 0) {
4983            InputMethodManager imm = InputMethodManager.peekInstance();
4984            if (imm != null) {
4985                if (imm.isActive(this)) {
4986                    boolean reported = false;
4987                    if (ims.mContentChanged || ims.mSelectionModeChanged) {
4988                        // We are in extract mode and the content has changed
4989                        // in some way... just report complete new text to the
4990                        // input method.
4991                        reported = reportExtractedText();
4992                    }
4993                    if (!reported && highlight != null) {
4994                        int candStart = -1;
4995                        int candEnd = -1;
4996                        if (mText instanceof Spannable) {
4997                            Spannable sp = (Spannable)mText;
4998                            candStart = EditableInputConnection.getComposingSpanStart(sp);
4999                            candEnd = EditableInputConnection.getComposingSpanEnd(sp);
5000                        }
5001                        imm.updateSelection(this, selStart, selEnd, candStart, candEnd);
5002                    }
5003                }
5004
5005                if (imm.isWatchingCursor(this) && highlight != null) {
5006                    highlight.computeBounds(ims.mTmpRectF, true);
5007                    ims.mTmpOffset[0] = ims.mTmpOffset[1] = 0;
5008
5009                    canvas.getMatrix().mapPoints(ims.mTmpOffset);
5010                    ims.mTmpRectF.offset(ims.mTmpOffset[0], ims.mTmpOffset[1]);
5011
5012                    ims.mTmpRectF.offset(0, cursorOffsetVertical);
5013
5014                    ims.mCursorRectInWindow.set((int)(ims.mTmpRectF.left + 0.5),
5015                            (int)(ims.mTmpRectF.top + 0.5),
5016                            (int)(ims.mTmpRectF.right + 0.5),
5017                            (int)(ims.mTmpRectF.bottom + 0.5));
5018
5019                    imm.updateCursor(this,
5020                            ims.mCursorRectInWindow.left, ims.mCursorRectInWindow.top,
5021                            ims.mCursorRectInWindow.right, ims.mCursorRectInWindow.bottom);
5022                }
5023            }
5024        }
5025
5026        if (mCorrectionHighlighter != null) {
5027            mCorrectionHighlighter.draw(canvas, cursorOffsetVertical);
5028        }
5029
5030        if (drawCursor) {
5031            drawCursor(canvas, cursorOffsetVertical);
5032            // Rely on the drawable entirely, do not draw the cursor line.
5033            // Has to be done after the IMM related code above which relies on the highlight.
5034            highlight = null;
5035        }
5036
5037        layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
5038
5039        if (mMarquee != null && mMarquee.shouldDrawGhost()) {
5040            canvas.translate((int) mMarquee.getGhostOffset(), 0.0f);
5041            layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
5042        }
5043
5044        /*  Comment out until we decide what to do about animations
5045        if (currentTransformation != null) {
5046            mTextPaint.setLinearTextOn(isLinearTextOn);
5047        }
5048        */
5049
5050        canvas.restore();
5051    }
5052
5053    private void updateCursorsPositions() {
5054        if (mCursorDrawableRes == 0) {
5055            mCursorCount = 0;
5056            return;
5057        }
5058
5059        final int offset = getSelectionStart();
5060        final int line = mLayout.getLineForOffset(offset);
5061        final int top = mLayout.getLineTop(line);
5062        final int bottom = mLayout.getLineTop(line + 1);
5063
5064        mCursorCount = mLayout.isLevelBoundary(offset) ? 2 : 1;
5065
5066        int middle = bottom;
5067        if (mCursorCount == 2) {
5068            // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)}
5069            middle = (top + bottom) >> 1;
5070        }
5071
5072        updateCursorPosition(0, top, middle, mLayout.getPrimaryHorizontal(offset));
5073
5074        if (mCursorCount == 2) {
5075            updateCursorPosition(1, middle, bottom, mLayout.getSecondaryHorizontal(offset));
5076        }
5077    }
5078
5079    private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) {
5080        if (mCursorDrawable[cursorIndex] == null)
5081            mCursorDrawable[cursorIndex] = mContext.getResources().getDrawable(mCursorDrawableRes);
5082
5083        if (mTempRect == null) mTempRect = new Rect();
5084
5085        mCursorDrawable[cursorIndex].getPadding(mTempRect);
5086        final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth();
5087        horizontal = Math.max(0.5f, horizontal - 0.5f);
5088        final int left = (int) (horizontal) - mTempRect.left;
5089        mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width,
5090                bottom + mTempRect.bottom);
5091    }
5092
5093    private void drawCursor(Canvas canvas, int cursorOffsetVertical) {
5094        final boolean translate = cursorOffsetVertical != 0;
5095        if (translate) canvas.translate(0, cursorOffsetVertical);
5096        for (int i = 0; i < mCursorCount; i++) {
5097            mCursorDrawable[i].draw(canvas);
5098        }
5099        if (translate) canvas.translate(0, -cursorOffsetVertical);
5100    }
5101
5102    @Override
5103    public void getFocusedRect(Rect r) {
5104        if (mLayout == null) {
5105            super.getFocusedRect(r);
5106            return;
5107        }
5108
5109        int selEnd = getSelectionEnd();
5110        if (selEnd < 0) {
5111            super.getFocusedRect(r);
5112            return;
5113        }
5114
5115        int selStart = getSelectionStart();
5116        if (selStart < 0 || selStart >= selEnd) {
5117            int line = mLayout.getLineForOffset(selEnd);
5118            r.top = mLayout.getLineTop(line);
5119            r.bottom = mLayout.getLineBottom(line);
5120            r.left = (int) mLayout.getPrimaryHorizontal(selEnd) - 2;
5121            r.right = r.left + 4;
5122        } else {
5123            int lineStart = mLayout.getLineForOffset(selStart);
5124            int lineEnd = mLayout.getLineForOffset(selEnd);
5125            r.top = mLayout.getLineTop(lineStart);
5126            r.bottom = mLayout.getLineBottom(lineEnd);
5127            if (lineStart == lineEnd) {
5128                r.left = (int) mLayout.getPrimaryHorizontal(selStart);
5129                r.right = (int) mLayout.getPrimaryHorizontal(selEnd);
5130            } else {
5131                // Selection extends across multiple lines -- the focused
5132                // rect covers the entire width.
5133                if (mHighlightPath == null) mHighlightPath = new Path();
5134                if (mHighlightPathBogus) {
5135                    mHighlightPath.reset();
5136                    mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
5137                    mHighlightPathBogus = false;
5138                }
5139                synchronized (sTempRect) {
5140                    mHighlightPath.computeBounds(sTempRect, true);
5141                    r.left = (int)sTempRect.left-1;
5142                    r.right = (int)sTempRect.right+1;
5143                }
5144            }
5145        }
5146
5147        // Adjust for padding and gravity.
5148        int paddingLeft = getCompoundPaddingLeft();
5149        int paddingTop = getExtendedPaddingTop();
5150        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5151            paddingTop += getVerticalOffset(false);
5152        }
5153        r.offset(paddingLeft, paddingTop);
5154    }
5155
5156    /**
5157     * Return the number of lines of text, or 0 if the internal Layout has not
5158     * been built.
5159     */
5160    public int getLineCount() {
5161        return mLayout != null ? mLayout.getLineCount() : 0;
5162    }
5163
5164    /**
5165     * Return the baseline for the specified line (0...getLineCount() - 1)
5166     * If bounds is not null, return the top, left, right, bottom extents
5167     * of the specified line in it. If the internal Layout has not been built,
5168     * return 0 and set bounds to (0, 0, 0, 0)
5169     * @param line which line to examine (0..getLineCount() - 1)
5170     * @param bounds Optional. If not null, it returns the extent of the line
5171     * @return the Y-coordinate of the baseline
5172     */
5173    public int getLineBounds(int line, Rect bounds) {
5174        if (mLayout == null) {
5175            if (bounds != null) {
5176                bounds.set(0, 0, 0, 0);
5177            }
5178            return 0;
5179        }
5180        else {
5181            int baseline = mLayout.getLineBounds(line, bounds);
5182
5183            int voffset = getExtendedPaddingTop();
5184            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5185                voffset += getVerticalOffset(true);
5186            }
5187            if (bounds != null) {
5188                bounds.offset(getCompoundPaddingLeft(), voffset);
5189            }
5190            return baseline + voffset;
5191        }
5192    }
5193
5194    @Override
5195    public int getBaseline() {
5196        if (mLayout == null) {
5197            return super.getBaseline();
5198        }
5199
5200        int voffset = 0;
5201        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5202            voffset = getVerticalOffset(true);
5203        }
5204
5205        return getExtendedPaddingTop() + voffset + mLayout.getLineBaseline(0);
5206    }
5207
5208    /**
5209     * @hide
5210     * @param offsetRequired
5211     */
5212    @Override
5213    protected int getFadeTop(boolean offsetRequired) {
5214        if (mLayout == null) return 0;
5215
5216        int voffset = 0;
5217        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5218            voffset = getVerticalOffset(true);
5219        }
5220
5221        if (offsetRequired) voffset += getTopPaddingOffset();
5222
5223        return getExtendedPaddingTop() + voffset;
5224    }
5225
5226    /**
5227     * @hide
5228     * @param offsetRequired
5229     */
5230    @Override
5231    protected int getFadeHeight(boolean offsetRequired) {
5232        return mLayout != null ? mLayout.getHeight() : 0;
5233    }
5234
5235    @Override
5236    public boolean onKeyPreIme(int keyCode, KeyEvent event) {
5237        if (keyCode == KeyEvent.KEYCODE_BACK) {
5238            boolean isInSelectionMode = mSelectionActionMode != null;
5239
5240            if (isInSelectionMode) {
5241                if (event.getAction() == KeyEvent.ACTION_DOWN && event.getRepeatCount() == 0) {
5242                    KeyEvent.DispatcherState state = getKeyDispatcherState();
5243                    if (state != null) {
5244                        state.startTracking(event, this);
5245                    }
5246                    return true;
5247                } else if (event.getAction() == KeyEvent.ACTION_UP) {
5248                    KeyEvent.DispatcherState state = getKeyDispatcherState();
5249                    if (state != null) {
5250                        state.handleUpEvent(event);
5251                    }
5252                    if (event.isTracking() && !event.isCanceled()) {
5253                        if (isInSelectionMode) {
5254                            stopSelectionActionMode();
5255                            return true;
5256                        }
5257                    }
5258                }
5259            }
5260        }
5261        return super.onKeyPreIme(keyCode, event);
5262    }
5263
5264    @Override
5265    public boolean onKeyDown(int keyCode, KeyEvent event) {
5266        int which = doKeyDown(keyCode, event, null);
5267        if (which == 0) {
5268            // Go through default dispatching.
5269            return super.onKeyDown(keyCode, event);
5270        }
5271
5272        return true;
5273    }
5274
5275    @Override
5276    public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) {
5277        KeyEvent down = KeyEvent.changeAction(event, KeyEvent.ACTION_DOWN);
5278
5279        int which = doKeyDown(keyCode, down, event);
5280        if (which == 0) {
5281            // Go through default dispatching.
5282            return super.onKeyMultiple(keyCode, repeatCount, event);
5283        }
5284        if (which == -1) {
5285            // Consumed the whole thing.
5286            return true;
5287        }
5288
5289        repeatCount--;
5290
5291        // We are going to dispatch the remaining events to either the input
5292        // or movement method.  To do this, we will just send a repeated stream
5293        // of down and up events until we have done the complete repeatCount.
5294        // It would be nice if those interfaces had an onKeyMultiple() method,
5295        // but adding that is a more complicated change.
5296        KeyEvent up = KeyEvent.changeAction(event, KeyEvent.ACTION_UP);
5297        if (which == 1) {
5298            mInput.onKeyUp(this, (Editable)mText, keyCode, up);
5299            while (--repeatCount > 0) {
5300                mInput.onKeyDown(this, (Editable)mText, keyCode, down);
5301                mInput.onKeyUp(this, (Editable)mText, keyCode, up);
5302            }
5303            hideErrorIfUnchanged();
5304
5305        } else if (which == 2) {
5306            mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
5307            while (--repeatCount > 0) {
5308                mMovement.onKeyDown(this, (Spannable)mText, keyCode, down);
5309                mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
5310            }
5311        }
5312
5313        return true;
5314    }
5315
5316    /**
5317     * Returns true if pressing ENTER in this field advances focus instead
5318     * of inserting the character.  This is true mostly in single-line fields,
5319     * but also in mail addresses and subjects which will display on multiple
5320     * lines but where it doesn't make sense to insert newlines.
5321     */
5322    private boolean shouldAdvanceFocusOnEnter() {
5323        if (mInput == null) {
5324            return false;
5325        }
5326
5327        if (mSingleLine) {
5328            return true;
5329        }
5330
5331        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
5332            int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
5333            if (variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_ADDRESS
5334                    || variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT) {
5335                return true;
5336            }
5337        }
5338
5339        return false;
5340    }
5341
5342    /**
5343     * Returns true if pressing TAB in this field advances focus instead
5344     * of inserting the character.  Insert tabs only in multi-line editors.
5345     */
5346    private boolean shouldAdvanceFocusOnTab() {
5347        if (mInput != null && !mSingleLine) {
5348            if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
5349                int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
5350                if (variation == EditorInfo.TYPE_TEXT_FLAG_IME_MULTI_LINE
5351                        || variation == EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE) {
5352                    return false;
5353                }
5354            }
5355        }
5356        return true;
5357    }
5358
5359    private int doKeyDown(int keyCode, KeyEvent event, KeyEvent otherEvent) {
5360        if (!isEnabled()) {
5361            return 0;
5362        }
5363
5364        switch (keyCode) {
5365            case KeyEvent.KEYCODE_ENTER:
5366                if (event.hasNoModifiers()) {
5367                    // When mInputContentType is set, we know that we are
5368                    // running in a "modern" cupcake environment, so don't need
5369                    // to worry about the application trying to capture
5370                    // enter key events.
5371                    if (mInputContentType != null) {
5372                        // If there is an action listener, given them a
5373                        // chance to consume the event.
5374                        if (mInputContentType.onEditorActionListener != null &&
5375                                mInputContentType.onEditorActionListener.onEditorAction(
5376                                this, EditorInfo.IME_NULL, event)) {
5377                            mInputContentType.enterDown = true;
5378                            // We are consuming the enter key for them.
5379                            return -1;
5380                        }
5381                    }
5382
5383                    // If our editor should move focus when enter is pressed, or
5384                    // this is a generated event from an IME action button, then
5385                    // don't let it be inserted into the text.
5386                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
5387                            || shouldAdvanceFocusOnEnter()) {
5388                        if (hasOnClickListeners()) {
5389                            return 0;
5390                        }
5391                        return -1;
5392                    }
5393                }
5394                break;
5395
5396            case KeyEvent.KEYCODE_DPAD_CENTER:
5397                if (event.hasNoModifiers()) {
5398                    if (shouldAdvanceFocusOnEnter()) {
5399                        return 0;
5400                    }
5401                }
5402                break;
5403
5404            case KeyEvent.KEYCODE_TAB:
5405                if (event.hasNoModifiers() || event.hasModifiers(KeyEvent.META_SHIFT_ON)) {
5406                    if (shouldAdvanceFocusOnTab()) {
5407                        return 0;
5408                    }
5409                }
5410                break;
5411
5412                // Has to be done on key down (and not on key up) to correctly be intercepted.
5413            case KeyEvent.KEYCODE_BACK:
5414                if (mSelectionActionMode != null) {
5415                    stopSelectionActionMode();
5416                    return -1;
5417                }
5418                break;
5419        }
5420
5421        if (mInput != null) {
5422            resetErrorChangedFlag();
5423
5424            boolean doDown = true;
5425            if (otherEvent != null) {
5426                try {
5427                    beginBatchEdit();
5428                    final boolean handled = mInput.onKeyOther(this, (Editable) mText, otherEvent);
5429                    hideErrorIfUnchanged();
5430                    doDown = false;
5431                    if (handled) {
5432                        return -1;
5433                    }
5434                } catch (AbstractMethodError e) {
5435                    // onKeyOther was added after 1.0, so if it isn't
5436                    // implemented we need to try to dispatch as a regular down.
5437                } finally {
5438                    endBatchEdit();
5439                }
5440            }
5441
5442            if (doDown) {
5443                beginBatchEdit();
5444                final boolean handled = mInput.onKeyDown(this, (Editable) mText, keyCode, event);
5445                endBatchEdit();
5446                hideErrorIfUnchanged();
5447                if (handled) return 1;
5448            }
5449        }
5450
5451        // bug 650865: sometimes we get a key event before a layout.
5452        // don't try to move around if we don't know the layout.
5453
5454        if (mMovement != null && mLayout != null) {
5455            boolean doDown = true;
5456            if (otherEvent != null) {
5457                try {
5458                    boolean handled = mMovement.onKeyOther(this, (Spannable) mText,
5459                            otherEvent);
5460                    doDown = false;
5461                    if (handled) {
5462                        return -1;
5463                    }
5464                } catch (AbstractMethodError e) {
5465                    // onKeyOther was added after 1.0, so if it isn't
5466                    // implemented we need to try to dispatch as a regular down.
5467                }
5468            }
5469            if (doDown) {
5470                if (mMovement.onKeyDown(this, (Spannable)mText, keyCode, event))
5471                    return 2;
5472            }
5473        }
5474
5475        return 0;
5476    }
5477
5478    /**
5479     * Resets the mErrorWasChanged flag, so that future calls to {@link #setError(CharSequence)}
5480     * can be recorded.
5481     * @hide
5482     */
5483    public void resetErrorChangedFlag() {
5484        /*
5485         * Keep track of what the error was before doing the input
5486         * so that if an input filter changed the error, we leave
5487         * that error showing.  Otherwise, we take down whatever
5488         * error was showing when the user types something.
5489         */
5490        mErrorWasChanged = false;
5491    }
5492
5493    /**
5494     * @hide
5495     */
5496    public void hideErrorIfUnchanged() {
5497        if (mError != null && !mErrorWasChanged) {
5498            setError(null, null);
5499        }
5500    }
5501
5502    @Override
5503    public boolean onKeyUp(int keyCode, KeyEvent event) {
5504        if (!isEnabled()) {
5505            return super.onKeyUp(keyCode, event);
5506        }
5507
5508        switch (keyCode) {
5509            case KeyEvent.KEYCODE_DPAD_CENTER:
5510                if (event.hasNoModifiers()) {
5511                    /*
5512                     * If there is a click listener, just call through to
5513                     * super, which will invoke it.
5514                     *
5515                     * If there isn't a click listener, try to show the soft
5516                     * input method.  (It will also
5517                     * call performClick(), but that won't do anything in
5518                     * this case.)
5519                     */
5520                    if (hasOnClickListeners()) {
5521                        if (mMovement != null && mText instanceof Editable
5522                                && mLayout != null && onCheckIsTextEditor()) {
5523                            InputMethodManager imm = InputMethodManager.peekInstance();
5524                            viewClicked(imm);
5525                            if (imm != null && mSoftInputShownOnFocus) {
5526                                imm.showSoftInput(this, 0);
5527                            }
5528                        }
5529                    }
5530                }
5531                return super.onKeyUp(keyCode, event);
5532
5533            case KeyEvent.KEYCODE_ENTER:
5534                if (event.hasNoModifiers()) {
5535                    if (mInputContentType != null
5536                            && mInputContentType.onEditorActionListener != null
5537                            && mInputContentType.enterDown) {
5538                        mInputContentType.enterDown = false;
5539                        if (mInputContentType.onEditorActionListener.onEditorAction(
5540                                this, EditorInfo.IME_NULL, event)) {
5541                            return true;
5542                        }
5543                    }
5544
5545                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
5546                            || shouldAdvanceFocusOnEnter()) {
5547                        /*
5548                         * If there is a click listener, just call through to
5549                         * super, which will invoke it.
5550                         *
5551                         * If there isn't a click listener, try to advance focus,
5552                         * but still call through to super, which will reset the
5553                         * pressed state and longpress state.  (It will also
5554                         * call performClick(), but that won't do anything in
5555                         * this case.)
5556                         */
5557                        if (hasOnClickListeners()) {
5558                            View v = focusSearch(FOCUS_DOWN);
5559
5560                            if (v != null) {
5561                                if (!v.requestFocus(FOCUS_DOWN)) {
5562                                    throw new IllegalStateException(
5563                                            "focus search returned a view " +
5564                                            "that wasn't able to take focus!");
5565                                }
5566
5567                                /*
5568                                 * Return true because we handled the key; super
5569                                 * will return false because there was no click
5570                                 * listener.
5571                                 */
5572                                super.onKeyUp(keyCode, event);
5573                                return true;
5574                            } else if ((event.getFlags()
5575                                    & KeyEvent.FLAG_EDITOR_ACTION) != 0) {
5576                                // No target for next focus, but make sure the IME
5577                                // if this came from it.
5578                                InputMethodManager imm = InputMethodManager.peekInstance();
5579                                if (imm != null && imm.isActive(this)) {
5580                                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
5581                                }
5582                            }
5583                        }
5584                    }
5585                    return super.onKeyUp(keyCode, event);
5586                }
5587                break;
5588        }
5589
5590        if (mInput != null)
5591            if (mInput.onKeyUp(this, (Editable) mText, keyCode, event))
5592                return true;
5593
5594        if (mMovement != null && mLayout != null)
5595            if (mMovement.onKeyUp(this, (Spannable) mText, keyCode, event))
5596                return true;
5597
5598        return super.onKeyUp(keyCode, event);
5599    }
5600
5601    @Override public boolean onCheckIsTextEditor() {
5602        return mInputType != EditorInfo.TYPE_NULL;
5603    }
5604
5605    @Override public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
5606        if (onCheckIsTextEditor() && isEnabled()) {
5607            if (mInputMethodState == null) {
5608                mInputMethodState = new InputMethodState();
5609            }
5610            outAttrs.inputType = mInputType;
5611            if (mInputContentType != null) {
5612                outAttrs.imeOptions = mInputContentType.imeOptions;
5613                outAttrs.privateImeOptions = mInputContentType.privateImeOptions;
5614                outAttrs.actionLabel = mInputContentType.imeActionLabel;
5615                outAttrs.actionId = mInputContentType.imeActionId;
5616                outAttrs.extras = mInputContentType.extras;
5617            } else {
5618                outAttrs.imeOptions = EditorInfo.IME_NULL;
5619            }
5620            if (focusSearch(FOCUS_DOWN) != null) {
5621                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_NEXT;
5622            }
5623            if (focusSearch(FOCUS_UP) != null) {
5624                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_PREVIOUS;
5625            }
5626            if ((outAttrs.imeOptions&EditorInfo.IME_MASK_ACTION)
5627                    == EditorInfo.IME_ACTION_UNSPECIFIED) {
5628                if ((outAttrs.imeOptions&EditorInfo.IME_FLAG_NAVIGATE_NEXT) != 0) {
5629                    // An action has not been set, but the enter key will move to
5630                    // the next focus, so set the action to that.
5631                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_NEXT;
5632                } else {
5633                    // An action has not been set, and there is no focus to move
5634                    // to, so let's just supply a "done" action.
5635                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_DONE;
5636                }
5637                if (!shouldAdvanceFocusOnEnter()) {
5638                    outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5639                }
5640            }
5641            if (isMultilineInputType(outAttrs.inputType)) {
5642                // Multi-line text editors should always show an enter key.
5643                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5644            }
5645            outAttrs.hintText = mHint;
5646            if (mText instanceof Editable) {
5647                InputConnection ic = new EditableInputConnection(this);
5648                outAttrs.initialSelStart = getSelectionStart();
5649                outAttrs.initialSelEnd = getSelectionEnd();
5650                outAttrs.initialCapsMode = ic.getCursorCapsMode(mInputType);
5651                return ic;
5652            }
5653        }
5654        return null;
5655    }
5656
5657    /**
5658     * If this TextView contains editable content, extract a portion of it
5659     * based on the information in <var>request</var> in to <var>outText</var>.
5660     * @return Returns true if the text was successfully extracted, else false.
5661     */
5662    public boolean extractText(ExtractedTextRequest request,
5663            ExtractedText outText) {
5664        return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN,
5665                EXTRACT_UNKNOWN, outText);
5666    }
5667
5668    static final int EXTRACT_NOTHING = -2;
5669    static final int EXTRACT_UNKNOWN = -1;
5670
5671    boolean extractTextInternal(ExtractedTextRequest request,
5672            int partialStartOffset, int partialEndOffset, int delta,
5673            ExtractedText outText) {
5674        final CharSequence content = mText;
5675        if (content != null) {
5676            if (partialStartOffset != EXTRACT_NOTHING) {
5677                final int N = content.length();
5678                if (partialStartOffset < 0) {
5679                    outText.partialStartOffset = outText.partialEndOffset = -1;
5680                    partialStartOffset = 0;
5681                    partialEndOffset = N;
5682                } else {
5683                    // Now use the delta to determine the actual amount of text
5684                    // we need.
5685                    partialEndOffset += delta;
5686                    // Adjust offsets to ensure we contain full spans.
5687                    if (content instanceof Spanned) {
5688                        Spanned spanned = (Spanned)content;
5689                        Object[] spans = spanned.getSpans(partialStartOffset,
5690                                partialEndOffset, ParcelableSpan.class);
5691                        int i = spans.length;
5692                        while (i > 0) {
5693                            i--;
5694                            int j = spanned.getSpanStart(spans[i]);
5695                            if (j < partialStartOffset) partialStartOffset = j;
5696                            j = spanned.getSpanEnd(spans[i]);
5697                            if (j > partialEndOffset) partialEndOffset = j;
5698                        }
5699                    }
5700                    outText.partialStartOffset = partialStartOffset;
5701                    outText.partialEndOffset = partialEndOffset - delta;
5702
5703                    if (partialStartOffset > N) {
5704                        partialStartOffset = N;
5705                    } else if (partialStartOffset < 0) {
5706                        partialStartOffset = 0;
5707                    }
5708                    if (partialEndOffset > N) {
5709                        partialEndOffset = N;
5710                    } else if (partialEndOffset < 0) {
5711                        partialEndOffset = 0;
5712                    }
5713                }
5714                if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) {
5715                    outText.text = content.subSequence(partialStartOffset,
5716                            partialEndOffset);
5717                } else {
5718                    outText.text = TextUtils.substring(content, partialStartOffset,
5719                            partialEndOffset);
5720                }
5721            } else {
5722                outText.partialStartOffset = 0;
5723                outText.partialEndOffset = 0;
5724                outText.text = "";
5725            }
5726            outText.flags = 0;
5727            if (MetaKeyKeyListener.getMetaState(mText, MetaKeyKeyListener.META_SELECTING) != 0) {
5728                outText.flags |= ExtractedText.FLAG_SELECTING;
5729            }
5730            if (mSingleLine) {
5731                outText.flags |= ExtractedText.FLAG_SINGLE_LINE;
5732            }
5733            outText.startOffset = 0;
5734            outText.selectionStart = getSelectionStart();
5735            outText.selectionEnd = getSelectionEnd();
5736            return true;
5737        }
5738        return false;
5739    }
5740
5741    boolean reportExtractedText() {
5742        final InputMethodState ims = mInputMethodState;
5743        if (ims != null) {
5744            final boolean contentChanged = ims.mContentChanged;
5745            if (contentChanged || ims.mSelectionModeChanged) {
5746                ims.mContentChanged = false;
5747                ims.mSelectionModeChanged = false;
5748                final ExtractedTextRequest req = mInputMethodState.mExtracting;
5749                if (req != null) {
5750                    InputMethodManager imm = InputMethodManager.peekInstance();
5751                    if (imm != null) {
5752                        if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Retrieving extracted start="
5753                                + ims.mChangedStart + " end=" + ims.mChangedEnd
5754                                + " delta=" + ims.mChangedDelta);
5755                        if (ims.mChangedStart < 0 && !contentChanged) {
5756                            ims.mChangedStart = EXTRACT_NOTHING;
5757                        }
5758                        if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd,
5759                                ims.mChangedDelta, ims.mTmpExtracted)) {
5760                            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Reporting extracted start="
5761                                    + ims.mTmpExtracted.partialStartOffset
5762                                    + " end=" + ims.mTmpExtracted.partialEndOffset
5763                                    + ": " + ims.mTmpExtracted.text);
5764                            imm.updateExtractedText(this, req.token,
5765                                    mInputMethodState.mTmpExtracted);
5766                            ims.mChangedStart = EXTRACT_UNKNOWN;
5767                            ims.mChangedEnd = EXTRACT_UNKNOWN;
5768                            ims.mChangedDelta = 0;
5769                            ims.mContentChanged = false;
5770                            return true;
5771                        }
5772                    }
5773                }
5774            }
5775        }
5776        return false;
5777    }
5778
5779    /**
5780     * This is used to remove all style-impacting spans from text before new
5781     * extracted text is being replaced into it, so that we don't have any
5782     * lingering spans applied during the replace.
5783     */
5784    static void removeParcelableSpans(Spannable spannable, int start, int end) {
5785        Object[] spans = spannable.getSpans(start, end, ParcelableSpan.class);
5786        int i = spans.length;
5787        while (i > 0) {
5788            i--;
5789            spannable.removeSpan(spans[i]);
5790        }
5791    }
5792
5793    /**
5794     * Apply to this text view the given extracted text, as previously
5795     * returned by {@link #extractText(ExtractedTextRequest, ExtractedText)}.
5796     */
5797    public void setExtractedText(ExtractedText text) {
5798        Editable content = getEditableText();
5799        if (text.text != null) {
5800            if (content == null) {
5801                setText(text.text, TextView.BufferType.EDITABLE);
5802            } else if (text.partialStartOffset < 0) {
5803                removeParcelableSpans(content, 0, content.length());
5804                content.replace(0, content.length(), text.text);
5805            } else {
5806                final int N = content.length();
5807                int start = text.partialStartOffset;
5808                if (start > N) start = N;
5809                int end = text.partialEndOffset;
5810                if (end > N) end = N;
5811                removeParcelableSpans(content, start, end);
5812                content.replace(start, end, text.text);
5813            }
5814        }
5815
5816        // Now set the selection position...  make sure it is in range, to
5817        // avoid crashes.  If this is a partial update, it is possible that
5818        // the underlying text may have changed, causing us problems here.
5819        // Also we just don't want to trust clients to do the right thing.
5820        Spannable sp = (Spannable)getText();
5821        final int N = sp.length();
5822        int start = text.selectionStart;
5823        if (start < 0) start = 0;
5824        else if (start > N) start = N;
5825        int end = text.selectionEnd;
5826        if (end < 0) end = 0;
5827        else if (end > N) end = N;
5828        Selection.setSelection(sp, start, end);
5829
5830        // Finally, update the selection mode.
5831        if ((text.flags&ExtractedText.FLAG_SELECTING) != 0) {
5832            MetaKeyKeyListener.startSelecting(this, sp);
5833        } else {
5834            MetaKeyKeyListener.stopSelecting(this, sp);
5835        }
5836    }
5837
5838    /**
5839     * @hide
5840     */
5841    public void setExtracting(ExtractedTextRequest req) {
5842        if (mInputMethodState != null) {
5843            mInputMethodState.mExtracting = req;
5844        }
5845        // This would stop a possible selection mode, but no such mode is started in case
5846        // extracted mode will start. Some text is selected though, and will trigger an action mode
5847        // in the extracted view.
5848        hideControllers();
5849    }
5850
5851    /**
5852     * Called by the framework in response to a text completion from
5853     * the current input method, provided by it calling
5854     * {@link InputConnection#commitCompletion
5855     * InputConnection.commitCompletion()}.  The default implementation does
5856     * nothing; text views that are supporting auto-completion should override
5857     * this to do their desired behavior.
5858     *
5859     * @param text The auto complete text the user has selected.
5860     */
5861    public void onCommitCompletion(CompletionInfo text) {
5862        // intentionally empty
5863    }
5864
5865    /**
5866     * Called by the framework in response to a text auto-correction (such as fixing a typo using a
5867     * a dictionnary) from the current input method, provided by it calling
5868     * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default
5869     * implementation flashes the background of the corrected word to provide feedback to the user.
5870     *
5871     * @param info The auto correct info about the text that was corrected.
5872     */
5873    public void onCommitCorrection(CorrectionInfo info) {
5874        if (mCorrectionHighlighter == null) {
5875            mCorrectionHighlighter = new CorrectionHighlighter();
5876        } else {
5877            mCorrectionHighlighter.invalidate(false);
5878        }
5879
5880        mCorrectionHighlighter.highlight(info);
5881    }
5882
5883    private class CorrectionHighlighter {
5884        private final Path mPath = new Path();
5885        private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
5886        private int mStart, mEnd;
5887        private long mFadingStartTime;
5888        private final static int FADE_OUT_DURATION = 400;
5889
5890        public CorrectionHighlighter() {
5891            mPaint.setCompatibilityScaling(getResources().getCompatibilityInfo().applicationScale);
5892            mPaint.setStyle(Paint.Style.FILL);
5893        }
5894
5895        public void highlight(CorrectionInfo info) {
5896            mStart = info.getOffset();
5897            mEnd = mStart + info.getNewText().length();
5898            mFadingStartTime = SystemClock.uptimeMillis();
5899
5900            if (mStart < 0 || mEnd < 0) {
5901                stopAnimation();
5902            }
5903        }
5904
5905        public void draw(Canvas canvas, int cursorOffsetVertical) {
5906            if (updatePath() && updatePaint()) {
5907                if (cursorOffsetVertical != 0) {
5908                    canvas.translate(0, cursorOffsetVertical);
5909                }
5910
5911                canvas.drawPath(mPath, mPaint);
5912
5913                if (cursorOffsetVertical != 0) {
5914                    canvas.translate(0, -cursorOffsetVertical);
5915                }
5916                invalidate(true); // TODO invalidate cursor region only
5917            } else {
5918                stopAnimation();
5919                invalidate(false); // TODO invalidate cursor region only
5920            }
5921        }
5922
5923        private boolean updatePaint() {
5924            final long duration = SystemClock.uptimeMillis() - mFadingStartTime;
5925            if (duration > FADE_OUT_DURATION) return false;
5926
5927            final float coef = 1.0f - (float) duration / FADE_OUT_DURATION;
5928            final int highlightColorAlpha = Color.alpha(mHighlightColor);
5929            final int color = (mHighlightColor & 0x00FFFFFF) +
5930                    ((int) (highlightColorAlpha * coef) << 24);
5931            mPaint.setColor(color);
5932            return true;
5933        }
5934
5935        private boolean updatePath() {
5936            final Layout layout = TextView.this.mLayout;
5937            if (layout == null) return false;
5938
5939            // Update in case text is edited while the animation is run
5940            final int length = mText.length();
5941            int start = Math.min(length, mStart);
5942            int end = Math.min(length, mEnd);
5943
5944            mPath.reset();
5945            TextView.this.mLayout.getSelectionPath(start, end, mPath);
5946            return true;
5947        }
5948
5949        private void invalidate(boolean delayed) {
5950            if (TextView.this.mLayout == null) return;
5951
5952            synchronized (sTempRect) {
5953                mPath.computeBounds(sTempRect, false);
5954
5955                int left = getCompoundPaddingLeft();
5956                int top = getExtendedPaddingTop() + getVerticalOffset(true);
5957
5958                if (delayed) {
5959                    TextView.this.postInvalidateDelayed(16, // 60 Hz update
5960                            left + (int) sTempRect.left, top + (int) sTempRect.top,
5961                            left + (int) sTempRect.right, top + (int) sTempRect.bottom);
5962                } else {
5963                    TextView.this.postInvalidate((int) sTempRect.left, (int) sTempRect.top,
5964                            (int) sTempRect.right, (int) sTempRect.bottom);
5965                }
5966            }
5967        }
5968
5969        private void stopAnimation() {
5970            TextView.this.mCorrectionHighlighter = null;
5971        }
5972    }
5973
5974    public void beginBatchEdit() {
5975        mInBatchEditControllers = true;
5976        final InputMethodState ims = mInputMethodState;
5977        if (ims != null) {
5978            int nesting = ++ims.mBatchEditNesting;
5979            if (nesting == 1) {
5980                ims.mCursorChanged = false;
5981                ims.mChangedDelta = 0;
5982                if (ims.mContentChanged) {
5983                    // We already have a pending change from somewhere else,
5984                    // so turn this into a full update.
5985                    ims.mChangedStart = 0;
5986                    ims.mChangedEnd = mText.length();
5987                } else {
5988                    ims.mChangedStart = EXTRACT_UNKNOWN;
5989                    ims.mChangedEnd = EXTRACT_UNKNOWN;
5990                    ims.mContentChanged = false;
5991                }
5992                onBeginBatchEdit();
5993            }
5994        }
5995    }
5996
5997    public void endBatchEdit() {
5998        mInBatchEditControllers = false;
5999        final InputMethodState ims = mInputMethodState;
6000        if (ims != null) {
6001            int nesting = --ims.mBatchEditNesting;
6002            if (nesting == 0) {
6003                finishBatchEdit(ims);
6004            }
6005        }
6006    }
6007
6008    void ensureEndedBatchEdit() {
6009        final InputMethodState ims = mInputMethodState;
6010        if (ims != null && ims.mBatchEditNesting != 0) {
6011            ims.mBatchEditNesting = 0;
6012            finishBatchEdit(ims);
6013        }
6014    }
6015
6016    void finishBatchEdit(final InputMethodState ims) {
6017        onEndBatchEdit();
6018
6019        if (ims.mContentChanged || ims.mSelectionModeChanged) {
6020            updateAfterEdit();
6021            reportExtractedText();
6022        } else if (ims.mCursorChanged) {
6023            // Cheezy way to get us to report the current cursor location.
6024            invalidateCursor();
6025        }
6026    }
6027
6028    void updateAfterEdit() {
6029        invalidate();
6030        int curs = getSelectionStart();
6031
6032        if (curs >= 0 || (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6033            registerForPreDraw();
6034        }
6035
6036        if (curs >= 0) {
6037            mHighlightPathBogus = true;
6038            makeBlink();
6039            bringPointIntoView(curs);
6040        }
6041
6042        checkForResize();
6043    }
6044
6045    /**
6046     * Called by the framework in response to a request to begin a batch
6047     * of edit operations through a call to link {@link #beginBatchEdit()}.
6048     */
6049    public void onBeginBatchEdit() {
6050        // intentionally empty
6051    }
6052
6053    /**
6054     * Called by the framework in response to a request to end a batch
6055     * of edit operations through a call to link {@link #endBatchEdit}.
6056     */
6057    public void onEndBatchEdit() {
6058        // intentionally empty
6059    }
6060
6061    /**
6062     * Called by the framework in response to a private command from the
6063     * current method, provided by it calling
6064     * {@link InputConnection#performPrivateCommand
6065     * InputConnection.performPrivateCommand()}.
6066     *
6067     * @param action The action name of the command.
6068     * @param data Any additional data for the command.  This may be null.
6069     * @return Return true if you handled the command, else false.
6070     */
6071    public boolean onPrivateIMECommand(String action, Bundle data) {
6072        return false;
6073    }
6074
6075    private void nullLayouts() {
6076        if (mLayout instanceof BoringLayout && mSavedLayout == null) {
6077            mSavedLayout = (BoringLayout) mLayout;
6078        }
6079        if (mHintLayout instanceof BoringLayout && mSavedHintLayout == null) {
6080            mSavedHintLayout = (BoringLayout) mHintLayout;
6081        }
6082
6083        mSavedMarqueeModeLayout = mLayout = mHintLayout = null;
6084
6085        mBoring = mHintBoring = null;
6086
6087        // Since it depends on the value of mLayout
6088        prepareCursorControllers();
6089    }
6090
6091    /**
6092     * Make a new Layout based on the already-measured size of the view,
6093     * on the assumption that it was measured correctly at some point.
6094     */
6095    private void assumeLayout() {
6096        int width = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6097
6098        if (width < 1) {
6099            width = 0;
6100        }
6101
6102        int physicalWidth = width;
6103
6104        if (mHorizontallyScrolling) {
6105            width = VERY_WIDE;
6106        }
6107
6108        makeNewLayout(width, physicalWidth, UNKNOWN_BORING, UNKNOWN_BORING,
6109                      physicalWidth, false);
6110    }
6111
6112    @Override
6113    protected void resetResolvedLayoutDirection() {
6114        super.resetResolvedLayoutDirection();
6115
6116        if (mLayoutAlignment != null &&
6117                (mTextAlign == TextAlign.VIEW_START ||
6118                mTextAlign == TextAlign.VIEW_END)) {
6119            mLayoutAlignment = null;
6120        }
6121    }
6122
6123    private Layout.Alignment getLayoutAlignment() {
6124        if (mLayoutAlignment == null) {
6125            Layout.Alignment alignment;
6126            TextAlign textAlign = mTextAlign;
6127            switch (textAlign) {
6128                case INHERIT:
6129                    // fall through to gravity temporarily
6130                    // intention is to inherit value through view hierarchy.
6131                case GRAVITY:
6132                    switch (mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) {
6133                        case Gravity.START:
6134                            alignment = Layout.Alignment.ALIGN_NORMAL;
6135                            break;
6136                        case Gravity.END:
6137                            alignment = Layout.Alignment.ALIGN_OPPOSITE;
6138                            break;
6139                        case Gravity.LEFT:
6140                            alignment = Layout.Alignment.ALIGN_LEFT;
6141                            break;
6142                        case Gravity.RIGHT:
6143                            alignment = Layout.Alignment.ALIGN_RIGHT;
6144                            break;
6145                        case Gravity.CENTER_HORIZONTAL:
6146                            alignment = Layout.Alignment.ALIGN_CENTER;
6147                            break;
6148                        default:
6149                            alignment = Layout.Alignment.ALIGN_NORMAL;
6150                            break;
6151                    }
6152                    break;
6153                case TEXT_START:
6154                    alignment = Layout.Alignment.ALIGN_NORMAL;
6155                    break;
6156                case TEXT_END:
6157                    alignment = Layout.Alignment.ALIGN_OPPOSITE;
6158                    break;
6159                case CENTER:
6160                    alignment = Layout.Alignment.ALIGN_CENTER;
6161                    break;
6162                case VIEW_START:
6163                    alignment = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
6164                            Layout.Alignment.ALIGN_RIGHT : Layout.Alignment.ALIGN_LEFT;
6165                    break;
6166                case VIEW_END:
6167                    alignment = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
6168                            Layout.Alignment.ALIGN_LEFT : Layout.Alignment.ALIGN_RIGHT;
6169                    break;
6170                default:
6171                    alignment = Layout.Alignment.ALIGN_NORMAL;
6172                    break;
6173            }
6174            mLayoutAlignment = alignment;
6175        }
6176        return mLayoutAlignment;
6177    }
6178
6179    /**
6180     * The width passed in is now the desired layout width,
6181     * not the full view width with padding.
6182     * {@hide}
6183     */
6184    protected void makeNewLayout(int wantWidth, int hintWidth,
6185                                 BoringLayout.Metrics boring,
6186                                 BoringLayout.Metrics hintBoring,
6187                                 int ellipsisWidth, boolean bringIntoView) {
6188        stopMarquee();
6189
6190        // Update "old" cached values
6191        mOldMaximum = mMaximum;
6192        mOldMaxMode = mMaxMode;
6193
6194        mHighlightPathBogus = true;
6195
6196        if (wantWidth < 0) {
6197            wantWidth = 0;
6198        }
6199        if (hintWidth < 0) {
6200            hintWidth = 0;
6201        }
6202
6203        Layout.Alignment alignment = getLayoutAlignment();
6204        boolean shouldEllipsize = mEllipsize != null && mInput == null;
6205        final boolean switchEllipsize = mEllipsize == TruncateAt.MARQUEE &&
6206                mMarqueeFadeMode != MARQUEE_FADE_NORMAL;
6207        TruncateAt effectiveEllipsize = mEllipsize;
6208        if (mEllipsize == TruncateAt.MARQUEE &&
6209                mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
6210            effectiveEllipsize = TruncateAt.END_SMALL;
6211        }
6212
6213        if (mTextDir == null) {
6214            resolveTextDirection();
6215        }
6216
6217        mLayout = makeSingleLayout(wantWidth, boring, ellipsisWidth, alignment, shouldEllipsize,
6218                effectiveEllipsize, effectiveEllipsize == mEllipsize);
6219        if (switchEllipsize) {
6220            TruncateAt oppositeEllipsize = effectiveEllipsize == TruncateAt.MARQUEE ?
6221                    TruncateAt.END : TruncateAt.MARQUEE;
6222            mSavedMarqueeModeLayout = makeSingleLayout(wantWidth, boring, ellipsisWidth, alignment,
6223                    shouldEllipsize, oppositeEllipsize, effectiveEllipsize != mEllipsize);
6224        }
6225
6226        shouldEllipsize = mEllipsize != null;
6227        mHintLayout = null;
6228
6229        if (mHint != null) {
6230            if (shouldEllipsize) hintWidth = wantWidth;
6231
6232            if (hintBoring == UNKNOWN_BORING) {
6233                hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mTextDir,
6234                                                   mHintBoring);
6235                if (hintBoring != null) {
6236                    mHintBoring = hintBoring;
6237                }
6238            }
6239
6240            if (hintBoring != null) {
6241                if (hintBoring.width <= hintWidth &&
6242                    (!shouldEllipsize || hintBoring.width <= ellipsisWidth)) {
6243                    if (mSavedHintLayout != null) {
6244                        mHintLayout = mSavedHintLayout.
6245                                replaceOrMake(mHint, mTextPaint,
6246                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6247                                hintBoring, mIncludePad);
6248                    } else {
6249                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6250                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6251                                hintBoring, mIncludePad);
6252                    }
6253
6254                    mSavedHintLayout = (BoringLayout) mHintLayout;
6255                } else if (shouldEllipsize && hintBoring.width <= hintWidth) {
6256                    if (mSavedHintLayout != null) {
6257                        mHintLayout = mSavedHintLayout.
6258                                replaceOrMake(mHint, mTextPaint,
6259                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6260                                hintBoring, mIncludePad, mEllipsize,
6261                                ellipsisWidth);
6262                    } else {
6263                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6264                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6265                                hintBoring, mIncludePad, mEllipsize,
6266                                ellipsisWidth);
6267                    }
6268                } else if (shouldEllipsize) {
6269                    mHintLayout = new StaticLayout(mHint,
6270                                0, mHint.length(),
6271                                mTextPaint, hintWidth, alignment, mTextDir, mSpacingMult,
6272                                mSpacingAdd, mIncludePad, mEllipsize,
6273                                ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6274                } else {
6275                    mHintLayout = new StaticLayout(mHint, mTextPaint,
6276                            hintWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6277                            mIncludePad);
6278                }
6279            } else if (shouldEllipsize) {
6280                mHintLayout = new StaticLayout(mHint,
6281                            0, mHint.length(),
6282                            mTextPaint, hintWidth, alignment, mTextDir, mSpacingMult,
6283                            mSpacingAdd, mIncludePad, mEllipsize,
6284                            ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6285            } else {
6286                mHintLayout = new StaticLayout(mHint, mTextPaint,
6287                        hintWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6288                        mIncludePad);
6289            }
6290        }
6291
6292        if (bringIntoView) {
6293            registerForPreDraw();
6294        }
6295
6296        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6297            if (!compressText(ellipsisWidth)) {
6298                final int height = mLayoutParams.height;
6299                // If the size of the view does not depend on the size of the text, try to
6300                // start the marquee immediately
6301                if (height != LayoutParams.WRAP_CONTENT && height != LayoutParams.MATCH_PARENT) {
6302                    startMarquee();
6303                } else {
6304                    // Defer the start of the marquee until we know our width (see setFrame())
6305                    mRestartMarquee = true;
6306                }
6307            }
6308        }
6309
6310        // CursorControllers need a non-null mLayout
6311        prepareCursorControllers();
6312    }
6313
6314    private Layout makeSingleLayout(int wantWidth, BoringLayout.Metrics boring, int ellipsisWidth,
6315            Layout.Alignment alignment, boolean shouldEllipsize, TruncateAt effectiveEllipsize,
6316            boolean useSaved) {
6317        Layout result = null;
6318        if (mText instanceof Spannable) {
6319            result = new DynamicLayout(mText, mTransformed, mTextPaint, wantWidth,
6320                    alignment, mTextDir, mSpacingMult,
6321                    mSpacingAdd, mIncludePad, mInput == null ? effectiveEllipsize : null,
6322                            ellipsisWidth);
6323        } else {
6324            if (boring == UNKNOWN_BORING) {
6325                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
6326                if (boring != null) {
6327                    mBoring = boring;
6328                }
6329            }
6330
6331            if (boring != null) {
6332                if (boring.width <= wantWidth &&
6333                        (effectiveEllipsize == null || boring.width <= ellipsisWidth)) {
6334                    if (useSaved && mSavedLayout != null) {
6335                        result = mSavedLayout.replaceOrMake(mTransformed, mTextPaint,
6336                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6337                                boring, mIncludePad);
6338                    } else {
6339                        result = BoringLayout.make(mTransformed, mTextPaint,
6340                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6341                                boring, mIncludePad);
6342                    }
6343
6344                    if (useSaved) {
6345                        mSavedLayout = (BoringLayout) result;
6346                    }
6347                } else if (shouldEllipsize && boring.width <= wantWidth) {
6348                    if (useSaved && mSavedLayout != null) {
6349                        result = mSavedLayout.replaceOrMake(mTransformed, mTextPaint,
6350                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6351                                boring, mIncludePad, effectiveEllipsize,
6352                                ellipsisWidth);
6353                    } else {
6354                        result = BoringLayout.make(mTransformed, mTextPaint,
6355                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6356                                boring, mIncludePad, effectiveEllipsize,
6357                                ellipsisWidth);
6358                    }
6359                } else if (shouldEllipsize) {
6360                    result = new StaticLayout(mTransformed,
6361                            0, mTransformed.length(),
6362                            mTextPaint, wantWidth, alignment, mTextDir, mSpacingMult,
6363                            mSpacingAdd, mIncludePad, effectiveEllipsize,
6364                            ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6365                } else {
6366                    result = new StaticLayout(mTransformed, mTextPaint,
6367                            wantWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6368                            mIncludePad);
6369                }
6370            } else if (shouldEllipsize) {
6371                result = new StaticLayout(mTransformed,
6372                        0, mTransformed.length(),
6373                        mTextPaint, wantWidth, alignment, mTextDir, mSpacingMult,
6374                        mSpacingAdd, mIncludePad, effectiveEllipsize,
6375                        ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6376            } else {
6377                result = new StaticLayout(mTransformed, mTextPaint,
6378                        wantWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6379                        mIncludePad);
6380            }
6381        }
6382        return result;
6383    }
6384
6385    private boolean compressText(float width) {
6386        if (isHardwareAccelerated()) return false;
6387
6388        // Only compress the text if it hasn't been compressed by the previous pass
6389        if (width > 0.0f && mLayout != null && getLineCount() == 1 && !mUserSetTextScaleX &&
6390                mTextPaint.getTextScaleX() == 1.0f) {
6391            final float textWidth = mLayout.getLineWidth(0);
6392            final float overflow = (textWidth + 1.0f - width) / width;
6393            if (overflow > 0.0f && overflow <= Marquee.MARQUEE_DELTA_MAX) {
6394                mTextPaint.setTextScaleX(1.0f - overflow - 0.005f);
6395                post(new Runnable() {
6396                    public void run() {
6397                        requestLayout();
6398                    }
6399                });
6400                return true;
6401            }
6402        }
6403
6404        return false;
6405    }
6406
6407    private static int desired(Layout layout) {
6408        int n = layout.getLineCount();
6409        CharSequence text = layout.getText();
6410        float max = 0;
6411
6412        // if any line was wrapped, we can't use it.
6413        // but it's ok for the last line not to have a newline
6414
6415        for (int i = 0; i < n - 1; i++) {
6416            if (text.charAt(layout.getLineEnd(i) - 1) != '\n')
6417                return -1;
6418        }
6419
6420        for (int i = 0; i < n; i++) {
6421            max = Math.max(max, layout.getLineWidth(i));
6422        }
6423
6424        return (int) FloatMath.ceil(max);
6425    }
6426
6427    /**
6428     * Set whether the TextView includes extra top and bottom padding to make
6429     * room for accents that go above the normal ascent and descent.
6430     * The default is true.
6431     *
6432     * @attr ref android.R.styleable#TextView_includeFontPadding
6433     */
6434    public void setIncludeFontPadding(boolean includepad) {
6435        if (mIncludePad != includepad) {
6436            mIncludePad = includepad;
6437
6438            if (mLayout != null) {
6439                nullLayouts();
6440                requestLayout();
6441                invalidate();
6442            }
6443        }
6444    }
6445
6446    private static final BoringLayout.Metrics UNKNOWN_BORING = new BoringLayout.Metrics();
6447
6448    @Override
6449    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
6450        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
6451        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
6452        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
6453        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
6454
6455        int width;
6456        int height;
6457
6458        BoringLayout.Metrics boring = UNKNOWN_BORING;
6459        BoringLayout.Metrics hintBoring = UNKNOWN_BORING;
6460
6461        if (mTextDir == null) {
6462            resolveTextDirection();
6463        }
6464
6465        int des = -1;
6466        boolean fromexisting = false;
6467
6468        if (widthMode == MeasureSpec.EXACTLY) {
6469            // Parent has told us how big to be. So be it.
6470            width = widthSize;
6471        } else {
6472            if (mLayout != null && mEllipsize == null) {
6473                des = desired(mLayout);
6474            }
6475
6476            if (des < 0) {
6477                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
6478                if (boring != null) {
6479                    mBoring = boring;
6480                }
6481            } else {
6482                fromexisting = true;
6483            }
6484
6485            if (boring == null || boring == UNKNOWN_BORING) {
6486                if (des < 0) {
6487                    des = (int) FloatMath.ceil(Layout.getDesiredWidth(mTransformed, mTextPaint));
6488                }
6489
6490                width = des;
6491            } else {
6492                width = boring.width;
6493            }
6494
6495            final Drawables dr = mDrawables;
6496            if (dr != null) {
6497                width = Math.max(width, dr.mDrawableWidthTop);
6498                width = Math.max(width, dr.mDrawableWidthBottom);
6499            }
6500
6501            if (mHint != null) {
6502                int hintDes = -1;
6503                int hintWidth;
6504
6505                if (mHintLayout != null && mEllipsize == null) {
6506                    hintDes = desired(mHintLayout);
6507                }
6508
6509                if (hintDes < 0) {
6510                    hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mHintBoring);
6511                    if (hintBoring != null) {
6512                        mHintBoring = hintBoring;
6513                    }
6514                }
6515
6516                if (hintBoring == null || hintBoring == UNKNOWN_BORING) {
6517                    if (hintDes < 0) {
6518                        hintDes = (int) FloatMath.ceil(
6519                                Layout.getDesiredWidth(mHint, mTextPaint));
6520                    }
6521
6522                    hintWidth = hintDes;
6523                } else {
6524                    hintWidth = hintBoring.width;
6525                }
6526
6527                if (hintWidth > width) {
6528                    width = hintWidth;
6529                }
6530            }
6531
6532            width += getCompoundPaddingLeft() + getCompoundPaddingRight();
6533
6534            if (mMaxWidthMode == EMS) {
6535                width = Math.min(width, mMaxWidth * getLineHeight());
6536            } else {
6537                width = Math.min(width, mMaxWidth);
6538            }
6539
6540            if (mMinWidthMode == EMS) {
6541                width = Math.max(width, mMinWidth * getLineHeight());
6542            } else {
6543                width = Math.max(width, mMinWidth);
6544            }
6545
6546            // Check against our minimum width
6547            width = Math.max(width, getSuggestedMinimumWidth());
6548
6549            if (widthMode == MeasureSpec.AT_MOST) {
6550                width = Math.min(widthSize, width);
6551            }
6552        }
6553
6554        int want = width - getCompoundPaddingLeft() - getCompoundPaddingRight();
6555        int unpaddedWidth = want;
6556
6557        if (mHorizontallyScrolling) want = VERY_WIDE;
6558
6559        int hintWant = want;
6560        int hintWidth = (mHintLayout == null) ? hintWant : mHintLayout.getWidth();
6561
6562        if (mLayout == null) {
6563            makeNewLayout(want, hintWant, boring, hintBoring,
6564                          width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6565        } else {
6566            final boolean layoutChanged = (mLayout.getWidth() != want) ||
6567                    (hintWidth != hintWant) ||
6568                    (mLayout.getEllipsizedWidth() !=
6569                            width - getCompoundPaddingLeft() - getCompoundPaddingRight());
6570
6571            final boolean widthChanged = (mHint == null) &&
6572                    (mEllipsize == null) &&
6573                    (want > mLayout.getWidth()) &&
6574                    (mLayout instanceof BoringLayout || (fromexisting && des >= 0 && des <= want));
6575
6576            final boolean maximumChanged = (mMaxMode != mOldMaxMode) || (mMaximum != mOldMaximum);
6577
6578            if (layoutChanged || maximumChanged) {
6579                if (!maximumChanged && widthChanged) {
6580                    mLayout.increaseWidthTo(want);
6581                } else {
6582                    makeNewLayout(want, hintWant, boring, hintBoring,
6583                            width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6584                }
6585            } else {
6586                // Nothing has changed
6587            }
6588        }
6589
6590        if (heightMode == MeasureSpec.EXACTLY) {
6591            // Parent has told us how big to be. So be it.
6592            height = heightSize;
6593            mDesiredHeightAtMeasure = -1;
6594        } else {
6595            int desired = getDesiredHeight();
6596
6597            height = desired;
6598            mDesiredHeightAtMeasure = desired;
6599
6600            if (heightMode == MeasureSpec.AT_MOST) {
6601                height = Math.min(desired, heightSize);
6602            }
6603        }
6604
6605        int unpaddedHeight = height - getCompoundPaddingTop() - getCompoundPaddingBottom();
6606        if (mMaxMode == LINES && mLayout.getLineCount() > mMaximum) {
6607            unpaddedHeight = Math.min(unpaddedHeight, mLayout.getLineTop(mMaximum));
6608        }
6609
6610        /*
6611         * We didn't let makeNewLayout() register to bring the cursor into view,
6612         * so do it here if there is any possibility that it is needed.
6613         */
6614        if (mMovement != null ||
6615            mLayout.getWidth() > unpaddedWidth ||
6616            mLayout.getHeight() > unpaddedHeight) {
6617            registerForPreDraw();
6618        } else {
6619            scrollTo(0, 0);
6620        }
6621
6622        setMeasuredDimension(width, height);
6623    }
6624
6625    private int getDesiredHeight() {
6626        return Math.max(
6627                getDesiredHeight(mLayout, true),
6628                getDesiredHeight(mHintLayout, mEllipsize != null));
6629    }
6630
6631    private int getDesiredHeight(Layout layout, boolean cap) {
6632        if (layout == null) {
6633            return 0;
6634        }
6635
6636        int linecount = layout.getLineCount();
6637        int pad = getCompoundPaddingTop() + getCompoundPaddingBottom();
6638        int desired = layout.getLineTop(linecount);
6639
6640        final Drawables dr = mDrawables;
6641        if (dr != null) {
6642            desired = Math.max(desired, dr.mDrawableHeightLeft);
6643            desired = Math.max(desired, dr.mDrawableHeightRight);
6644        }
6645
6646        desired += pad;
6647
6648        if (mMaxMode == LINES) {
6649            /*
6650             * Don't cap the hint to a certain number of lines.
6651             * (Do cap it, though, if we have a maximum pixel height.)
6652             */
6653            if (cap) {
6654                if (linecount > mMaximum) {
6655                    desired = layout.getLineTop(mMaximum);
6656
6657                    if (dr != null) {
6658                        desired = Math.max(desired, dr.mDrawableHeightLeft);
6659                        desired = Math.max(desired, dr.mDrawableHeightRight);
6660                    }
6661
6662                    desired += pad;
6663                    linecount = mMaximum;
6664                }
6665            }
6666        } else {
6667            desired = Math.min(desired, mMaximum);
6668        }
6669
6670        if (mMinMode == LINES) {
6671            if (linecount < mMinimum) {
6672                desired += getLineHeight() * (mMinimum - linecount);
6673            }
6674        } else {
6675            desired = Math.max(desired, mMinimum);
6676        }
6677
6678        // Check against our minimum height
6679        desired = Math.max(desired, getSuggestedMinimumHeight());
6680
6681        return desired;
6682    }
6683
6684    /**
6685     * Check whether a change to the existing text layout requires a
6686     * new view layout.
6687     */
6688    private void checkForResize() {
6689        boolean sizeChanged = false;
6690
6691        if (mLayout != null) {
6692            // Check if our width changed
6693            if (mLayoutParams.width == LayoutParams.WRAP_CONTENT) {
6694                sizeChanged = true;
6695                invalidate();
6696            }
6697
6698            // Check if our height changed
6699            if (mLayoutParams.height == LayoutParams.WRAP_CONTENT) {
6700                int desiredHeight = getDesiredHeight();
6701
6702                if (desiredHeight != this.getHeight()) {
6703                    sizeChanged = true;
6704                }
6705            } else if (mLayoutParams.height == LayoutParams.MATCH_PARENT) {
6706                if (mDesiredHeightAtMeasure >= 0) {
6707                    int desiredHeight = getDesiredHeight();
6708
6709                    if (desiredHeight != mDesiredHeightAtMeasure) {
6710                        sizeChanged = true;
6711                    }
6712                }
6713            }
6714        }
6715
6716        if (sizeChanged) {
6717            requestLayout();
6718            // caller will have already invalidated
6719        }
6720    }
6721
6722    /**
6723     * Check whether entirely new text requires a new view layout
6724     * or merely a new text layout.
6725     */
6726    private void checkForRelayout() {
6727        // If we have a fixed width, we can just swap in a new text layout
6728        // if the text height stays the same or if the view height is fixed.
6729
6730        if ((mLayoutParams.width != LayoutParams.WRAP_CONTENT ||
6731                (mMaxWidthMode == mMinWidthMode && mMaxWidth == mMinWidth)) &&
6732                (mHint == null || mHintLayout != null) &&
6733                (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight() > 0)) {
6734            // Static width, so try making a new text layout.
6735
6736            int oldht = mLayout.getHeight();
6737            int want = mLayout.getWidth();
6738            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
6739
6740            /*
6741             * No need to bring the text into view, since the size is not
6742             * changing (unless we do the requestLayout(), in which case it
6743             * will happen at measure).
6744             */
6745            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
6746                          mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight(),
6747                          false);
6748
6749            if (mEllipsize != TextUtils.TruncateAt.MARQUEE) {
6750                // In a fixed-height view, so use our new text layout.
6751                if (mLayoutParams.height != LayoutParams.WRAP_CONTENT &&
6752                    mLayoutParams.height != LayoutParams.MATCH_PARENT) {
6753                    invalidate();
6754                    return;
6755                }
6756
6757                // Dynamic height, but height has stayed the same,
6758                // so use our new text layout.
6759                if (mLayout.getHeight() == oldht &&
6760                    (mHintLayout == null || mHintLayout.getHeight() == oldht)) {
6761                    invalidate();
6762                    return;
6763                }
6764            }
6765
6766            // We lose: the height has changed and we have a dynamic height.
6767            // Request a new view layout using our new text layout.
6768            requestLayout();
6769            invalidate();
6770        } else {
6771            // Dynamic width, so we have no choice but to request a new
6772            // view layout with a new text layout.
6773            nullLayouts();
6774            requestLayout();
6775            invalidate();
6776        }
6777    }
6778
6779    /**
6780     * Returns true if anything changed.
6781     */
6782    private boolean bringTextIntoView() {
6783        int line = 0;
6784        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6785            line = mLayout.getLineCount() - 1;
6786        }
6787
6788        Layout.Alignment a = mLayout.getParagraphAlignment(line);
6789        int dir = mLayout.getParagraphDirection(line);
6790        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6791        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6792        int ht = mLayout.getHeight();
6793
6794        int scrollx, scrolly;
6795
6796        // Convert to left, center, or right alignment.
6797        if (a == Layout.Alignment.ALIGN_NORMAL) {
6798            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_LEFT :
6799                Layout.Alignment.ALIGN_RIGHT;
6800        } else if (a == Layout.Alignment.ALIGN_OPPOSITE){
6801            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_RIGHT :
6802                Layout.Alignment.ALIGN_LEFT;
6803        }
6804
6805        if (a == Layout.Alignment.ALIGN_CENTER) {
6806            /*
6807             * Keep centered if possible, or, if it is too wide to fit,
6808             * keep leading edge in view.
6809             */
6810
6811            int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6812            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6813
6814            if (right - left < hspace) {
6815                scrollx = (right + left) / 2 - hspace / 2;
6816            } else {
6817                if (dir < 0) {
6818                    scrollx = right - hspace;
6819                } else {
6820                    scrollx = left;
6821                }
6822            }
6823        } else if (a == Layout.Alignment.ALIGN_RIGHT) {
6824            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6825            scrollx = right - hspace;
6826        } else { // a == Layout.Alignment.ALIGN_LEFT (will also be the default)
6827            scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
6828        }
6829
6830        if (ht < vspace) {
6831            scrolly = 0;
6832        } else {
6833            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6834                scrolly = ht - vspace;
6835            } else {
6836                scrolly = 0;
6837            }
6838        }
6839
6840        if (scrollx != mScrollX || scrolly != mScrollY) {
6841            scrollTo(scrollx, scrolly);
6842            return true;
6843        } else {
6844            return false;
6845        }
6846    }
6847
6848    /**
6849     * Move the point, specified by the offset, into the view if it is needed.
6850     * This has to be called after layout. Returns true if anything changed.
6851     */
6852    public boolean bringPointIntoView(int offset) {
6853        boolean changed = false;
6854
6855        if (mLayout == null) return changed;
6856
6857        int line = mLayout.getLineForOffset(offset);
6858
6859        // FIXME: Is it okay to truncate this, or should we round?
6860        final int x = (int)mLayout.getPrimaryHorizontal(offset);
6861        final int top = mLayout.getLineTop(line);
6862        final int bottom = mLayout.getLineTop(line + 1);
6863
6864        int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6865        int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6866        int ht = mLayout.getHeight();
6867
6868        int grav;
6869
6870        switch (mLayout.getParagraphAlignment(line)) {
6871            case ALIGN_LEFT:
6872                grav = 1;
6873                break;
6874            case ALIGN_RIGHT:
6875                grav = -1;
6876                break;
6877            case ALIGN_NORMAL:
6878                grav = mLayout.getParagraphDirection(line);
6879                break;
6880            case ALIGN_OPPOSITE:
6881                grav = -mLayout.getParagraphDirection(line);
6882                break;
6883            case ALIGN_CENTER:
6884            default:
6885                grav = 0;
6886                break;
6887        }
6888
6889        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6890        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6891
6892        int hslack = (bottom - top) / 2;
6893        int vslack = hslack;
6894
6895        if (vslack > vspace / 4)
6896            vslack = vspace / 4;
6897        if (hslack > hspace / 4)
6898            hslack = hspace / 4;
6899
6900        int hs = mScrollX;
6901        int vs = mScrollY;
6902
6903        if (top - vs < vslack)
6904            vs = top - vslack;
6905        if (bottom - vs > vspace - vslack)
6906            vs = bottom - (vspace - vslack);
6907        if (ht - vs < vspace)
6908            vs = ht - vspace;
6909        if (0 - vs > 0)
6910            vs = 0;
6911
6912        if (grav != 0) {
6913            if (x - hs < hslack) {
6914                hs = x - hslack;
6915            }
6916            if (x - hs > hspace - hslack) {
6917                hs = x - (hspace - hslack);
6918            }
6919        }
6920
6921        if (grav < 0) {
6922            if (left - hs > 0)
6923                hs = left;
6924            if (right - hs < hspace)
6925                hs = right - hspace;
6926        } else if (grav > 0) {
6927            if (right - hs < hspace)
6928                hs = right - hspace;
6929            if (left - hs > 0)
6930                hs = left;
6931        } else /* grav == 0 */ {
6932            if (right - left <= hspace) {
6933                /*
6934                 * If the entire text fits, center it exactly.
6935                 */
6936                hs = left - (hspace - (right - left)) / 2;
6937            } else if (x > right - hslack) {
6938                /*
6939                 * If we are near the right edge, keep the right edge
6940                 * at the edge of the view.
6941                 */
6942                hs = right - hspace;
6943            } else if (x < left + hslack) {
6944                /*
6945                 * If we are near the left edge, keep the left edge
6946                 * at the edge of the view.
6947                 */
6948                hs = left;
6949            } else if (left > hs) {
6950                /*
6951                 * Is there whitespace visible at the left?  Fix it if so.
6952                 */
6953                hs = left;
6954            } else if (right < hs + hspace) {
6955                /*
6956                 * Is there whitespace visible at the right?  Fix it if so.
6957                 */
6958                hs = right - hspace;
6959            } else {
6960                /*
6961                 * Otherwise, float as needed.
6962                 */
6963                if (x - hs < hslack) {
6964                    hs = x - hslack;
6965                }
6966                if (x - hs > hspace - hslack) {
6967                    hs = x - (hspace - hslack);
6968                }
6969            }
6970        }
6971
6972        if (hs != mScrollX || vs != mScrollY) {
6973            if (mScroller == null) {
6974                scrollTo(hs, vs);
6975            } else {
6976                long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll;
6977                int dx = hs - mScrollX;
6978                int dy = vs - mScrollY;
6979
6980                if (duration > ANIMATED_SCROLL_GAP) {
6981                    mScroller.startScroll(mScrollX, mScrollY, dx, dy);
6982                    awakenScrollBars(mScroller.getDuration());
6983                    invalidate();
6984                } else {
6985                    if (!mScroller.isFinished()) {
6986                        mScroller.abortAnimation();
6987                    }
6988
6989                    scrollBy(dx, dy);
6990                }
6991
6992                mLastScroll = AnimationUtils.currentAnimationTimeMillis();
6993            }
6994
6995            changed = true;
6996        }
6997
6998        if (isFocused()) {
6999            // This offsets because getInterestingRect() is in terms of viewport coordinates, but
7000            // requestRectangleOnScreen() is in terms of content coordinates.
7001
7002            if (mTempRect == null) mTempRect = new Rect();
7003            // The offsets here are to ensure the rectangle we are using is
7004            // within our view bounds, in case the cursor is on the far left
7005            // or right.  If it isn't withing the bounds, then this request
7006            // will be ignored.
7007            mTempRect.set(x - 2, top, x + 2, bottom);
7008            getInterestingRect(mTempRect, line);
7009            mTempRect.offset(mScrollX, mScrollY);
7010
7011            if (requestRectangleOnScreen(mTempRect)) {
7012                changed = true;
7013            }
7014        }
7015
7016        return changed;
7017    }
7018
7019    /**
7020     * Move the cursor, if needed, so that it is at an offset that is visible
7021     * to the user.  This will not move the cursor if it represents more than
7022     * one character (a selection range).  This will only work if the
7023     * TextView contains spannable text; otherwise it will do nothing.
7024     *
7025     * @return True if the cursor was actually moved, false otherwise.
7026     */
7027    public boolean moveCursorToVisibleOffset() {
7028        if (!(mText instanceof Spannable)) {
7029            return false;
7030        }
7031        int start = getSelectionStart();
7032        int end = getSelectionEnd();
7033        if (start != end) {
7034            return false;
7035        }
7036
7037        // First: make sure the line is visible on screen:
7038
7039        int line = mLayout.getLineForOffset(start);
7040
7041        final int top = mLayout.getLineTop(line);
7042        final int bottom = mLayout.getLineTop(line + 1);
7043        final int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
7044        int vslack = (bottom - top) / 2;
7045        if (vslack > vspace / 4)
7046            vslack = vspace / 4;
7047        final int vs = mScrollY;
7048
7049        if (top < (vs+vslack)) {
7050            line = mLayout.getLineForVertical(vs+vslack+(bottom-top));
7051        } else if (bottom > (vspace+vs-vslack)) {
7052            line = mLayout.getLineForVertical(vspace+vs-vslack-(bottom-top));
7053        }
7054
7055        // Next: make sure the character is visible on screen:
7056
7057        final int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
7058        final int hs = mScrollX;
7059        final int leftChar = mLayout.getOffsetForHorizontal(line, hs);
7060        final int rightChar = mLayout.getOffsetForHorizontal(line, hspace+hs);
7061
7062        // line might contain bidirectional text
7063        final int lowChar = leftChar < rightChar ? leftChar : rightChar;
7064        final int highChar = leftChar > rightChar ? leftChar : rightChar;
7065
7066        int newStart = start;
7067        if (newStart < lowChar) {
7068            newStart = lowChar;
7069        } else if (newStart > highChar) {
7070            newStart = highChar;
7071        }
7072
7073        if (newStart != start) {
7074            Selection.setSelection((Spannable)mText, newStart);
7075            return true;
7076        }
7077
7078        return false;
7079    }
7080
7081    @Override
7082    public void computeScroll() {
7083        if (mScroller != null) {
7084            if (mScroller.computeScrollOffset()) {
7085                mScrollX = mScroller.getCurrX();
7086                mScrollY = mScroller.getCurrY();
7087                invalidateParentCaches();
7088                postInvalidate();  // So we draw again
7089            }
7090        }
7091    }
7092
7093    private void getInterestingRect(Rect r, int line) {
7094        convertFromViewportToContentCoordinates(r);
7095
7096        // Rectangle can can be expanded on first and last line to take
7097        // padding into account.
7098        // TODO Take left/right padding into account too?
7099        if (line == 0) r.top -= getExtendedPaddingTop();
7100        if (line == mLayout.getLineCount() - 1) r.bottom += getExtendedPaddingBottom();
7101    }
7102
7103    private void convertFromViewportToContentCoordinates(Rect r) {
7104        final int horizontalOffset = viewportToContentHorizontalOffset();
7105        r.left += horizontalOffset;
7106        r.right += horizontalOffset;
7107
7108        final int verticalOffset = viewportToContentVerticalOffset();
7109        r.top += verticalOffset;
7110        r.bottom += verticalOffset;
7111    }
7112
7113    private int viewportToContentHorizontalOffset() {
7114        return getCompoundPaddingLeft() - mScrollX;
7115    }
7116
7117    private int viewportToContentVerticalOffset() {
7118        int offset = getExtendedPaddingTop() - mScrollY;
7119        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
7120            offset += getVerticalOffset(false);
7121        }
7122        return offset;
7123    }
7124
7125    @Override
7126    public void debug(int depth) {
7127        super.debug(depth);
7128
7129        String output = debugIndent(depth);
7130        output += "frame={" + mLeft + ", " + mTop + ", " + mRight
7131                + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY
7132                + "} ";
7133
7134        if (mText != null) {
7135
7136            output += "mText=\"" + mText + "\" ";
7137            if (mLayout != null) {
7138                output += "mLayout width=" + mLayout.getWidth()
7139                        + " height=" + mLayout.getHeight();
7140            }
7141        } else {
7142            output += "mText=NULL";
7143        }
7144        Log.d(VIEW_LOG_TAG, output);
7145    }
7146
7147    /**
7148     * Convenience for {@link Selection#getSelectionStart}.
7149     */
7150    @ViewDebug.ExportedProperty(category = "text")
7151    public int getSelectionStart() {
7152        return Selection.getSelectionStart(getText());
7153    }
7154
7155    /**
7156     * Convenience for {@link Selection#getSelectionEnd}.
7157     */
7158    @ViewDebug.ExportedProperty(category = "text")
7159    public int getSelectionEnd() {
7160        return Selection.getSelectionEnd(getText());
7161    }
7162
7163    /**
7164     * Return true iff there is a selection inside this text view.
7165     */
7166    public boolean hasSelection() {
7167        final int selectionStart = getSelectionStart();
7168        final int selectionEnd = getSelectionEnd();
7169
7170        return selectionStart >= 0 && selectionStart != selectionEnd;
7171    }
7172
7173    /**
7174     * Sets the properties of this field (lines, horizontally scrolling,
7175     * transformation method) to be for a single-line input.
7176     *
7177     * @attr ref android.R.styleable#TextView_singleLine
7178     */
7179    public void setSingleLine() {
7180        setSingleLine(true);
7181    }
7182
7183    /**
7184     * Sets the properties of this field to transform input to ALL CAPS
7185     * display. This may use a "small caps" formatting if available.
7186     * This setting will be ignored if this field is editable or selectable.
7187     *
7188     * This call replaces the current transformation method. Disabling this
7189     * will not necessarily restore the previous behavior from before this
7190     * was enabled.
7191     *
7192     * @see #setTransformationMethod(TransformationMethod)
7193     * @attr ref android.R.styleable#TextView_textAllCaps
7194     */
7195    public void setAllCaps(boolean allCaps) {
7196        if (allCaps) {
7197            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
7198        } else {
7199            setTransformationMethod(null);
7200        }
7201    }
7202
7203    /**
7204     * If true, sets the properties of this field (number of lines, horizontally scrolling,
7205     * transformation method) to be for a single-line input; if false, restores these to the default
7206     * conditions.
7207     *
7208     * Note that the default conditions are not necessarily those that were in effect prior this
7209     * method, and you may want to reset these properties to your custom values.
7210     *
7211     * @attr ref android.R.styleable#TextView_singleLine
7212     */
7213    @android.view.RemotableViewMethod
7214    public void setSingleLine(boolean singleLine) {
7215        // Could be used, but may break backward compatibility.
7216        // if (mSingleLine == singleLine) return;
7217        setInputTypeSingleLine(singleLine);
7218        applySingleLine(singleLine, true, true);
7219    }
7220
7221    /**
7222     * Adds or remove the EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE on the mInputType.
7223     * @param singleLine
7224     */
7225    private void setInputTypeSingleLine(boolean singleLine) {
7226        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
7227            if (singleLine) {
7228                mInputType &= ~EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
7229            } else {
7230                mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
7231            }
7232        }
7233    }
7234
7235    private void applySingleLine(boolean singleLine, boolean applyTransformation,
7236            boolean changeMaxLines) {
7237        mSingleLine = singleLine;
7238        if (singleLine) {
7239            setLines(1);
7240            setHorizontallyScrolling(true);
7241            if (applyTransformation) {
7242                setTransformationMethod(SingleLineTransformationMethod.getInstance());
7243            }
7244        } else {
7245            if (changeMaxLines) {
7246                setMaxLines(Integer.MAX_VALUE);
7247            }
7248            setHorizontallyScrolling(false);
7249            if (applyTransformation) {
7250                setTransformationMethod(null);
7251            }
7252        }
7253    }
7254
7255    /**
7256     * Causes words in the text that are longer than the view is wide
7257     * to be ellipsized instead of broken in the middle.  You may also
7258     * want to {@link #setSingleLine} or {@link #setHorizontallyScrolling}
7259     * to constrain the text to a single line.  Use <code>null</code>
7260     * to turn off ellipsizing.
7261     *
7262     * If {@link #setMaxLines} has been used to set two or more lines,
7263     * {@link android.text.TextUtils.TruncateAt#END} and
7264     * {@link android.text.TextUtils.TruncateAt#MARQUEE}* are only supported
7265     * (other ellipsizing types will not do anything).
7266     *
7267     * @attr ref android.R.styleable#TextView_ellipsize
7268     */
7269    public void setEllipsize(TextUtils.TruncateAt where) {
7270        // TruncateAt is an enum. != comparison is ok between these singleton objects.
7271        if (mEllipsize != where) {
7272            mEllipsize = where;
7273
7274            if (mLayout != null) {
7275                nullLayouts();
7276                requestLayout();
7277                invalidate();
7278            }
7279        }
7280    }
7281
7282    /**
7283     * Sets how many times to repeat the marquee animation. Only applied if the
7284     * TextView has marquee enabled. Set to -1 to repeat indefinitely.
7285     *
7286     * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
7287     */
7288    public void setMarqueeRepeatLimit(int marqueeLimit) {
7289        mMarqueeRepeatLimit = marqueeLimit;
7290    }
7291
7292    /**
7293     * Returns where, if anywhere, words that are longer than the view
7294     * is wide should be ellipsized.
7295     */
7296    @ViewDebug.ExportedProperty
7297    public TextUtils.TruncateAt getEllipsize() {
7298        return mEllipsize;
7299    }
7300
7301    /**
7302     * Set the TextView so that when it takes focus, all the text is
7303     * selected.
7304     *
7305     * @attr ref android.R.styleable#TextView_selectAllOnFocus
7306     */
7307    @android.view.RemotableViewMethod
7308    public void setSelectAllOnFocus(boolean selectAllOnFocus) {
7309        mSelectAllOnFocus = selectAllOnFocus;
7310
7311        if (selectAllOnFocus && !(mText instanceof Spannable)) {
7312            setText(mText, BufferType.SPANNABLE);
7313        }
7314    }
7315
7316    /**
7317     * Set whether the cursor is visible.  The default is true.
7318     *
7319     * @attr ref android.R.styleable#TextView_cursorVisible
7320     */
7321    @android.view.RemotableViewMethod
7322    public void setCursorVisible(boolean visible) {
7323        if (mCursorVisible != visible) {
7324            mCursorVisible = visible;
7325            invalidate();
7326
7327            makeBlink();
7328
7329            // InsertionPointCursorController depends on mCursorVisible
7330            prepareCursorControllers();
7331        }
7332    }
7333
7334    private boolean isCursorVisible() {
7335        return mCursorVisible && isTextEditable();
7336    }
7337
7338    private boolean canMarquee() {
7339        int width = (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight());
7340        return width > 0 && (mLayout.getLineWidth(0) > width ||
7341                (mMarqueeFadeMode != MARQUEE_FADE_NORMAL && mSavedMarqueeModeLayout != null &&
7342                        mSavedMarqueeModeLayout.getLineWidth(0) > width));
7343    }
7344
7345    private void startMarquee() {
7346        // Do not ellipsize EditText
7347        if (mInput != null) return;
7348
7349        if (compressText(getWidth() - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
7350            return;
7351        }
7352
7353        if ((mMarquee == null || mMarquee.isStopped()) && (isFocused() || isSelected()) &&
7354                getLineCount() == 1 && canMarquee()) {
7355
7356            if (mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
7357                mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_FADE;
7358                final Layout tmp = mLayout;
7359                mLayout = mSavedMarqueeModeLayout;
7360                mSavedMarqueeModeLayout = tmp;
7361                setHorizontalFadingEdgeEnabled(true);
7362                requestLayout();
7363                invalidate();
7364            }
7365
7366            if (mMarquee == null) mMarquee = new Marquee(this);
7367            mMarquee.start(mMarqueeRepeatLimit);
7368        }
7369    }
7370
7371    private void stopMarquee() {
7372        if (mMarquee != null && !mMarquee.isStopped()) {
7373            mMarquee.stop();
7374        }
7375
7376        if (mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_FADE) {
7377            mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
7378            final Layout tmp = mSavedMarqueeModeLayout;
7379            mSavedMarqueeModeLayout = mLayout;
7380            mLayout = tmp;
7381            setHorizontalFadingEdgeEnabled(false);
7382            requestLayout();
7383            invalidate();
7384        }
7385    }
7386
7387    private void startStopMarquee(boolean start) {
7388        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7389            if (start) {
7390                startMarquee();
7391            } else {
7392                stopMarquee();
7393            }
7394        }
7395    }
7396
7397    private static final class Marquee extends Handler {
7398        // TODO: Add an option to configure this
7399        private static final float MARQUEE_DELTA_MAX = 0.07f;
7400        private static final int MARQUEE_DELAY = 1200;
7401        private static final int MARQUEE_RESTART_DELAY = 1200;
7402        private static final int MARQUEE_RESOLUTION = 1000 / 30;
7403        private static final int MARQUEE_PIXELS_PER_SECOND = 30;
7404
7405        private static final byte MARQUEE_STOPPED = 0x0;
7406        private static final byte MARQUEE_STARTING = 0x1;
7407        private static final byte MARQUEE_RUNNING = 0x2;
7408
7409        private static final int MESSAGE_START = 0x1;
7410        private static final int MESSAGE_TICK = 0x2;
7411        private static final int MESSAGE_RESTART = 0x3;
7412
7413        private final WeakReference<TextView> mView;
7414
7415        private byte mStatus = MARQUEE_STOPPED;
7416        private final float mScrollUnit;
7417        private float mMaxScroll;
7418        float mMaxFadeScroll;
7419        private float mGhostStart;
7420        private float mGhostOffset;
7421        private float mFadeStop;
7422        private int mRepeatLimit;
7423
7424        float mScroll;
7425
7426        Marquee(TextView v) {
7427            final float density = v.getContext().getResources().getDisplayMetrics().density;
7428            mScrollUnit = (MARQUEE_PIXELS_PER_SECOND * density) / MARQUEE_RESOLUTION;
7429            mView = new WeakReference<TextView>(v);
7430        }
7431
7432        @Override
7433        public void handleMessage(Message msg) {
7434            switch (msg.what) {
7435                case MESSAGE_START:
7436                    mStatus = MARQUEE_RUNNING;
7437                    tick();
7438                    break;
7439                case MESSAGE_TICK:
7440                    tick();
7441                    break;
7442                case MESSAGE_RESTART:
7443                    if (mStatus == MARQUEE_RUNNING) {
7444                        if (mRepeatLimit >= 0) {
7445                            mRepeatLimit--;
7446                        }
7447                        start(mRepeatLimit);
7448                    }
7449                    break;
7450            }
7451        }
7452
7453        void tick() {
7454            if (mStatus != MARQUEE_RUNNING) {
7455                return;
7456            }
7457
7458            removeMessages(MESSAGE_TICK);
7459
7460            final TextView textView = mView.get();
7461            if (textView != null && (textView.isFocused() || textView.isSelected())) {
7462                mScroll += mScrollUnit;
7463                if (mScroll > mMaxScroll) {
7464                    mScroll = mMaxScroll;
7465                    sendEmptyMessageDelayed(MESSAGE_RESTART, MARQUEE_RESTART_DELAY);
7466                } else {
7467                    sendEmptyMessageDelayed(MESSAGE_TICK, MARQUEE_RESOLUTION);
7468                }
7469                textView.invalidate();
7470            }
7471        }
7472
7473        void stop() {
7474            mStatus = MARQUEE_STOPPED;
7475            removeMessages(MESSAGE_START);
7476            removeMessages(MESSAGE_RESTART);
7477            removeMessages(MESSAGE_TICK);
7478            resetScroll();
7479        }
7480
7481        private void resetScroll() {
7482            mScroll = 0.0f;
7483            final TextView textView = mView.get();
7484            if (textView != null) textView.invalidate();
7485        }
7486
7487        void start(int repeatLimit) {
7488            if (repeatLimit == 0) {
7489                stop();
7490                return;
7491            }
7492            mRepeatLimit = repeatLimit;
7493            final TextView textView = mView.get();
7494            if (textView != null && textView.mLayout != null) {
7495                mStatus = MARQUEE_STARTING;
7496                mScroll = 0.0f;
7497                final int textWidth = textView.getWidth() - textView.getCompoundPaddingLeft() -
7498                        textView.getCompoundPaddingRight();
7499                final float lineWidth = textView.mLayout.getLineWidth(0);
7500                final float gap = textWidth / 3.0f;
7501                mGhostStart = lineWidth - textWidth + gap;
7502                mMaxScroll = mGhostStart + textWidth;
7503                mGhostOffset = lineWidth + gap;
7504                mFadeStop = lineWidth + textWidth / 6.0f;
7505                mMaxFadeScroll = mGhostStart + lineWidth + lineWidth;
7506
7507                textView.invalidate();
7508                sendEmptyMessageDelayed(MESSAGE_START, MARQUEE_DELAY);
7509            }
7510        }
7511
7512        float getGhostOffset() {
7513            return mGhostOffset;
7514        }
7515
7516        boolean shouldDrawLeftFade() {
7517            return mScroll <= mFadeStop;
7518        }
7519
7520        boolean shouldDrawGhost() {
7521            return mStatus == MARQUEE_RUNNING && mScroll > mGhostStart;
7522        }
7523
7524        boolean isRunning() {
7525            return mStatus == MARQUEE_RUNNING;
7526        }
7527
7528        boolean isStopped() {
7529            return mStatus == MARQUEE_STOPPED;
7530        }
7531    }
7532
7533    /**
7534     * This method is called when the text is changed, in case any subclasses
7535     * would like to know.
7536     *
7537     * Within <code>text</code>, the <code>lengthAfter</code> characters
7538     * beginning at <code>start</code> have just replaced old text that had
7539     * length <code>lengthBefore</code>. It is an error to attempt to make
7540     * changes to <code>text</code> from this callback.
7541     *
7542     * @param text The text the TextView is displaying
7543     * @param start The offset of the start of the range of the text that was
7544     * modified
7545     * @param lengthBefore The length of the former text that has been replaced
7546     * @param lengthAfter The length of the replacement modified text
7547     */
7548    protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
7549        // intentionally empty, template pattern method can be overridden by subclasses
7550    }
7551
7552    /**
7553     * This method is called when the selection has changed, in case any
7554     * subclasses would like to know.
7555     *
7556     * @param selStart The new selection start location.
7557     * @param selEnd The new selection end location.
7558     */
7559    protected void onSelectionChanged(int selStart, int selEnd) {
7560        sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED);
7561    }
7562
7563    /**
7564     * Adds a TextWatcher to the list of those whose methods are called
7565     * whenever this TextView's text changes.
7566     * <p>
7567     * In 1.0, the {@link TextWatcher#afterTextChanged} method was erroneously
7568     * not called after {@link #setText} calls.  Now, doing {@link #setText}
7569     * if there are any text changed listeners forces the buffer type to
7570     * Editable if it would not otherwise be and does call this method.
7571     */
7572    public void addTextChangedListener(TextWatcher watcher) {
7573        if (mListeners == null) {
7574            mListeners = new ArrayList<TextWatcher>();
7575        }
7576
7577        mListeners.add(watcher);
7578    }
7579
7580    /**
7581     * Removes the specified TextWatcher from the list of those whose
7582     * methods are called
7583     * whenever this TextView's text changes.
7584     */
7585    public void removeTextChangedListener(TextWatcher watcher) {
7586        if (mListeners != null) {
7587            int i = mListeners.indexOf(watcher);
7588
7589            if (i >= 0) {
7590                mListeners.remove(i);
7591            }
7592        }
7593    }
7594
7595    private void sendBeforeTextChanged(CharSequence text, int start, int before, int after) {
7596        if (mListeners != null) {
7597            final ArrayList<TextWatcher> list = mListeners;
7598            final int count = list.size();
7599            for (int i = 0; i < count; i++) {
7600                list.get(i).beforeTextChanged(text, start, before, after);
7601            }
7602        }
7603
7604        // The spans that are inside or intersect the modified region no longer make sense
7605        removeIntersectingSpans(start, start + before, SpellCheckSpan.class);
7606        removeIntersectingSpans(start, start + before, SuggestionSpan.class);
7607    }
7608
7609    // Removes all spans that are inside or actually overlap the start..end range
7610    private <T> void removeIntersectingSpans(int start, int end, Class<T> type) {
7611        if (!(mText instanceof Editable)) return;
7612        Editable text = (Editable) mText;
7613
7614        T[] spans = text.getSpans(start, end, type);
7615        final int length = spans.length;
7616        for (int i = 0; i < length; i++) {
7617            final int s = text.getSpanStart(spans[i]);
7618            final int e = text.getSpanEnd(spans[i]);
7619            // Spans that are adjacent to the edited region will be handled in
7620            // updateSpellCheckSpans. Result depends on what will be added (space or text)
7621            if (e == start || s == end) break;
7622            text.removeSpan(spans[i]);
7623        }
7624    }
7625
7626    /**
7627     * Not private so it can be called from an inner class without going
7628     * through a thunk.
7629     */
7630    void sendOnTextChanged(CharSequence text, int start, int before, int after) {
7631        if (mListeners != null) {
7632            final ArrayList<TextWatcher> list = mListeners;
7633            final int count = list.size();
7634            for (int i = 0; i < count; i++) {
7635                list.get(i).onTextChanged(text, start, before, after);
7636            }
7637        }
7638
7639        updateSpellCheckSpans(start, start + after);
7640
7641        // Hide the controllers as soon as text is modified (typing, procedural...)
7642        // We do not hide the span controllers, since they can be added when a new text is
7643        // inserted into the text view (voice IME).
7644        hideCursorControllers();
7645    }
7646
7647    /**
7648     * Not private so it can be called from an inner class without going
7649     * through a thunk.
7650     */
7651    void sendAfterTextChanged(Editable text) {
7652        if (mListeners != null) {
7653            final ArrayList<TextWatcher> list = mListeners;
7654            final int count = list.size();
7655            for (int i = 0; i < count; i++) {
7656                list.get(i).afterTextChanged(text);
7657            }
7658        }
7659    }
7660
7661    /**
7662     * Not private so it can be called from an inner class without going
7663     * through a thunk.
7664     */
7665    void handleTextChanged(CharSequence buffer, int start, int before, int after) {
7666        final InputMethodState ims = mInputMethodState;
7667        if (ims == null || ims.mBatchEditNesting == 0) {
7668            updateAfterEdit();
7669        }
7670        if (ims != null) {
7671            ims.mContentChanged = true;
7672            if (ims.mChangedStart < 0) {
7673                ims.mChangedStart = start;
7674                ims.mChangedEnd = start+before;
7675            } else {
7676                ims.mChangedStart = Math.min(ims.mChangedStart, start);
7677                ims.mChangedEnd = Math.max(ims.mChangedEnd, start + before - ims.mChangedDelta);
7678            }
7679            ims.mChangedDelta += after-before;
7680        }
7681
7682        sendOnTextChanged(buffer, start, before, after);
7683        onTextChanged(buffer, start, before, after);
7684    }
7685
7686    /**
7687     * Not private so it can be called from an inner class without going
7688     * through a thunk.
7689     */
7690    void spanChange(Spanned buf, Object what, int oldStart, int newStart, int oldEnd, int newEnd) {
7691        // XXX Make the start and end move together if this ends up
7692        // spending too much time invalidating.
7693
7694        boolean selChanged = false;
7695        int newSelStart=-1, newSelEnd=-1;
7696
7697        final InputMethodState ims = mInputMethodState;
7698
7699        if (what == Selection.SELECTION_END) {
7700            mHighlightPathBogus = true;
7701            selChanged = true;
7702            newSelEnd = newStart;
7703
7704            if (!isFocused()) {
7705                mSelectionMoved = true;
7706            }
7707
7708            if (oldStart >= 0 || newStart >= 0) {
7709                invalidateCursor(Selection.getSelectionStart(buf), oldStart, newStart);
7710                registerForPreDraw();
7711                makeBlink();
7712            }
7713        }
7714
7715        if (what == Selection.SELECTION_START) {
7716            mHighlightPathBogus = true;
7717            selChanged = true;
7718            newSelStart = newStart;
7719
7720            if (!isFocused()) {
7721                mSelectionMoved = true;
7722            }
7723
7724            if (oldStart >= 0 || newStart >= 0) {
7725                int end = Selection.getSelectionEnd(buf);
7726                invalidateCursor(end, oldStart, newStart);
7727            }
7728        }
7729
7730        if (selChanged) {
7731            if ((buf.getSpanFlags(what)&Spanned.SPAN_INTERMEDIATE) == 0) {
7732                if (newSelStart < 0) {
7733                    newSelStart = Selection.getSelectionStart(buf);
7734                }
7735                if (newSelEnd < 0) {
7736                    newSelEnd = Selection.getSelectionEnd(buf);
7737                }
7738                onSelectionChanged(newSelStart, newSelEnd);
7739            }
7740        }
7741
7742        if (what instanceof UpdateAppearance || what instanceof ParagraphStyle) {
7743            if (ims == null || ims.mBatchEditNesting == 0) {
7744                invalidate();
7745                mHighlightPathBogus = true;
7746                checkForResize();
7747            } else {
7748                ims.mContentChanged = true;
7749            }
7750        }
7751
7752        if (MetaKeyKeyListener.isMetaTracker(buf, what)) {
7753            mHighlightPathBogus = true;
7754            if (ims != null && MetaKeyKeyListener.isSelectingMetaTracker(buf, what)) {
7755                ims.mSelectionModeChanged = true;
7756            }
7757
7758            if (Selection.getSelectionStart(buf) >= 0) {
7759                if (ims == null || ims.mBatchEditNesting == 0) {
7760                    invalidateCursor();
7761                } else {
7762                    ims.mCursorChanged = true;
7763                }
7764            }
7765        }
7766
7767        if (what instanceof ParcelableSpan) {
7768            // If this is a span that can be sent to a remote process,
7769            // the current extract editor would be interested in it.
7770            if (ims != null && ims.mExtracting != null) {
7771                if (ims.mBatchEditNesting != 0) {
7772                    if (oldStart >= 0) {
7773                        if (ims.mChangedStart > oldStart) {
7774                            ims.mChangedStart = oldStart;
7775                        }
7776                        if (ims.mChangedStart > oldEnd) {
7777                            ims.mChangedStart = oldEnd;
7778                        }
7779                    }
7780                    if (newStart >= 0) {
7781                        if (ims.mChangedStart > newStart) {
7782                            ims.mChangedStart = newStart;
7783                        }
7784                        if (ims.mChangedStart > newEnd) {
7785                            ims.mChangedStart = newEnd;
7786                        }
7787                    }
7788                } else {
7789                    if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Span change outside of batch: "
7790                            + oldStart + "-" + oldEnd + ","
7791                            + newStart + "-" + newEnd + what);
7792                    ims.mContentChanged = true;
7793                }
7794            }
7795        }
7796
7797        if (newStart < 0 && what instanceof SpellCheckSpan) {
7798            getSpellChecker().removeSpellCheckSpan((SpellCheckSpan) what);
7799        }
7800    }
7801
7802    /**
7803     * Create new SpellCheckSpans on the modified region.
7804     */
7805    private void updateSpellCheckSpans(int start, int end) {
7806        if (isTextEditable() && isSuggestionsEnabled()) {
7807            getSpellChecker().spellCheck(start, end);
7808        }
7809    }
7810
7811    /**
7812     * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related
7813     * pop-up should be displayed.
7814     */
7815    private class EasyEditSpanController {
7816
7817        private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs
7818
7819        private EasyEditPopupWindow mPopupWindow;
7820
7821        private EasyEditSpan mEasyEditSpan;
7822
7823        private Runnable mHidePopup;
7824
7825        private void hide() {
7826            if (mPopupWindow != null) {
7827                mPopupWindow.hide();
7828                TextView.this.removeCallbacks(mHidePopup);
7829            }
7830            removeSpans(mText);
7831            mEasyEditSpan = null;
7832        }
7833
7834        /**
7835         * Monitors the changes in the text.
7836         *
7837         * <p>{@link ChangeWatcher#onSpanAdded(Spannable, Object, int, int)} cannot be used,
7838         * as the notifications are not sent when a spannable (with spans) is inserted.
7839         */
7840        public void onTextChange(CharSequence buffer) {
7841            adjustSpans(mText);
7842
7843            if (getWindowVisibility() != View.VISIBLE) {
7844                // The window is not visible yet, ignore the text change.
7845                return;
7846            }
7847
7848            if (mLayout == null) {
7849                // The view has not been layout yet, ignore the text change
7850                return;
7851            }
7852
7853            InputMethodManager imm = InputMethodManager.peekInstance();
7854            if (!(TextView.this instanceof ExtractEditText)
7855                    && imm != null && imm.isFullscreenMode()) {
7856                // The input is in extract mode. We do not have to handle the easy edit in the
7857                // original TextView, as the ExtractEditText will do
7858                return;
7859            }
7860
7861            // Remove the current easy edit span, as the text changed, and remove the pop-up
7862            // (if any)
7863            if (mEasyEditSpan != null) {
7864                if (mText instanceof Spannable) {
7865                    ((Spannable) mText).removeSpan(mEasyEditSpan);
7866                }
7867                mEasyEditSpan = null;
7868            }
7869            if (mPopupWindow != null && mPopupWindow.isShowing()) {
7870                mPopupWindow.hide();
7871            }
7872
7873            // Display the new easy edit span (if any).
7874            if (buffer instanceof Spanned) {
7875                mEasyEditSpan = getSpan((Spanned) buffer);
7876                if (mEasyEditSpan != null) {
7877                    if (mPopupWindow == null) {
7878                        mPopupWindow = new EasyEditPopupWindow();
7879                        mHidePopup = new Runnable() {
7880                            @Override
7881                            public void run() {
7882                                hide();
7883                            }
7884                        };
7885                    }
7886                    mPopupWindow.show(mEasyEditSpan);
7887                    TextView.this.removeCallbacks(mHidePopup);
7888                    TextView.this.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS);
7889                }
7890            }
7891        }
7892
7893        /**
7894         * Adjusts the spans by removing all of them except the last one.
7895         */
7896        private void adjustSpans(CharSequence buffer) {
7897            // This method enforces that only one easy edit span is attached to the text.
7898            // A better way to enforce this would be to listen for onSpanAdded, but this method
7899            // cannot be used in this scenario as no notification is triggered when a text with
7900            // spans is inserted into a text.
7901            if (buffer instanceof Spannable) {
7902                Spannable spannable = (Spannable) buffer;
7903                EasyEditSpan[] spans = spannable.getSpans(0, spannable.length(),
7904                        EasyEditSpan.class);
7905                for (int i = 0; i < spans.length - 1; i++) {
7906                    spannable.removeSpan(spans[i]);
7907                }
7908            }
7909        }
7910
7911        /**
7912         * Removes all the {@link EasyEditSpan} currently attached.
7913         */
7914        private void removeSpans(CharSequence buffer) {
7915            if (buffer instanceof Spannable) {
7916                Spannable spannable = (Spannable) buffer;
7917                EasyEditSpan[] spans = spannable.getSpans(0, spannable.length(),
7918                        EasyEditSpan.class);
7919                for (int i = 0; i < spans.length; i++) {
7920                    spannable.removeSpan(spans[i]);
7921                }
7922            }
7923        }
7924
7925        private EasyEditSpan getSpan(Spanned spanned) {
7926            EasyEditSpan[] easyEditSpans = spanned.getSpans(0, spanned.length(),
7927                    EasyEditSpan.class);
7928            if (easyEditSpans.length == 0) {
7929                return null;
7930            } else {
7931                return easyEditSpans[0];
7932            }
7933        }
7934    }
7935
7936    /**
7937     * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled
7938     * by {@link EasyEditSpanController}.
7939     */
7940    private class EasyEditPopupWindow extends PinnedPopupWindow
7941            implements OnClickListener {
7942        private static final int POPUP_TEXT_LAYOUT =
7943                com.android.internal.R.layout.text_edit_action_popup_text;
7944        private TextView mDeleteTextView;
7945        private EasyEditSpan mEasyEditSpan;
7946
7947        @Override
7948        protected void createPopupWindow() {
7949            mPopupWindow = new PopupWindow(TextView.this.mContext, null,
7950                    com.android.internal.R.attr.textSelectHandleWindowStyle);
7951            mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
7952            mPopupWindow.setClippingEnabled(true);
7953        }
7954
7955        @Override
7956        protected void initContentView() {
7957            LinearLayout linearLayout = new LinearLayout(TextView.this.getContext());
7958            linearLayout.setOrientation(LinearLayout.HORIZONTAL);
7959            mContentView = linearLayout;
7960            mContentView.setBackgroundResource(
7961                    com.android.internal.R.drawable.text_edit_side_paste_window);
7962
7963            LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
7964                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
7965
7966            LayoutParams wrapContent = new LayoutParams(
7967                    ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
7968
7969            mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
7970            mDeleteTextView.setLayoutParams(wrapContent);
7971            mDeleteTextView.setText(com.android.internal.R.string.delete);
7972            mDeleteTextView.setOnClickListener(this);
7973            mContentView.addView(mDeleteTextView);
7974        }
7975
7976        public void show(EasyEditSpan easyEditSpan) {
7977            mEasyEditSpan = easyEditSpan;
7978            super.show();
7979        }
7980
7981        @Override
7982        public void onClick(View view) {
7983            if (view == mDeleteTextView) {
7984                Editable editable = (Editable) mText;
7985                int start = editable.getSpanStart(mEasyEditSpan);
7986                int end = editable.getSpanEnd(mEasyEditSpan);
7987                if (start >= 0 && end >= 0) {
7988                    deleteText_internal(start, end);
7989                }
7990            }
7991        }
7992
7993        @Override
7994        protected int getTextOffset() {
7995            // Place the pop-up at the end of the span
7996            Editable editable = (Editable) mText;
7997            return editable.getSpanEnd(mEasyEditSpan);
7998        }
7999
8000        @Override
8001        protected int getVerticalLocalPosition(int line) {
8002            return mLayout.getLineBottom(line);
8003        }
8004
8005        @Override
8006        protected int clipVertically(int positionY) {
8007            // As we display the pop-up below the span, no vertical clipping is required.
8008            return positionY;
8009        }
8010    }
8011
8012    private class ChangeWatcher implements TextWatcher, SpanWatcher {
8013
8014        private CharSequence mBeforeText;
8015
8016        private EasyEditSpanController mEasyEditSpanController;
8017
8018        private ChangeWatcher() {
8019            mEasyEditSpanController = new EasyEditSpanController();
8020        }
8021
8022        public void beforeTextChanged(CharSequence buffer, int start,
8023                                      int before, int after) {
8024            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "beforeTextChanged start=" + start
8025                    + " before=" + before + " after=" + after + ": " + buffer);
8026
8027            if (AccessibilityManager.getInstance(mContext).isEnabled()
8028                    && !isPasswordInputType(mInputType)
8029                    && !hasPasswordTransformationMethod()) {
8030                mBeforeText = buffer.toString();
8031            }
8032
8033            TextView.this.sendBeforeTextChanged(buffer, start, before, after);
8034        }
8035
8036        public void onTextChanged(CharSequence buffer, int start,
8037                                  int before, int after) {
8038            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onTextChanged start=" + start
8039                    + " before=" + before + " after=" + after + ": " + buffer);
8040            TextView.this.handleTextChanged(buffer, start, before, after);
8041
8042            mEasyEditSpanController.onTextChange(buffer);
8043
8044            if (AccessibilityManager.getInstance(mContext).isEnabled() &&
8045                    (isFocused() || isSelected() && isShown())) {
8046                sendAccessibilityEventTypeViewTextChanged(mBeforeText, start, before, after);
8047                mBeforeText = null;
8048            }
8049        }
8050
8051        public void afterTextChanged(Editable buffer) {
8052            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "afterTextChanged: " + buffer);
8053            TextView.this.sendAfterTextChanged(buffer);
8054
8055            if (MetaKeyKeyListener.getMetaState(buffer, MetaKeyKeyListener.META_SELECTING) != 0) {
8056                MetaKeyKeyListener.stopSelecting(TextView.this, buffer);
8057            }
8058        }
8059
8060        public void onSpanChanged(Spannable buf,
8061                                  Object what, int s, int e, int st, int en) {
8062            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanChanged s=" + s + " e=" + e
8063                    + " st=" + st + " en=" + en + " what=" + what + ": " + buf);
8064            TextView.this.spanChange(buf, what, s, st, e, en);
8065        }
8066
8067        public void onSpanAdded(Spannable buf, Object what, int s, int e) {
8068            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanAdded s=" + s + " e=" + e
8069                    + " what=" + what + ": " + buf);
8070            TextView.this.spanChange(buf, what, -1, s, -1, e);
8071        }
8072
8073        public void onSpanRemoved(Spannable buf, Object what, int s, int e) {
8074            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanRemoved s=" + s + " e=" + e
8075                    + " what=" + what + ": " + buf);
8076            TextView.this.spanChange(buf, what, s, -1, e, -1);
8077        }
8078
8079        private void hideControllers() {
8080            mEasyEditSpanController.hide();
8081        }
8082    }
8083
8084    /**
8085     * @hide
8086     */
8087    @Override
8088    public void dispatchFinishTemporaryDetach() {
8089        mDispatchTemporaryDetach = true;
8090        super.dispatchFinishTemporaryDetach();
8091        mDispatchTemporaryDetach = false;
8092    }
8093
8094    @Override
8095    public void onStartTemporaryDetach() {
8096        super.onStartTemporaryDetach();
8097        // Only track when onStartTemporaryDetach() is called directly,
8098        // usually because this instance is an editable field in a list
8099        if (!mDispatchTemporaryDetach) mTemporaryDetach = true;
8100
8101        // Because of View recycling in ListView, there is no easy way to know when a TextView with
8102        // selection becomes visible again. Until a better solution is found, stop text selection
8103        // mode (if any) as soon as this TextView is recycled.
8104        hideControllers();
8105    }
8106
8107    @Override
8108    public void onFinishTemporaryDetach() {
8109        super.onFinishTemporaryDetach();
8110        // Only track when onStartTemporaryDetach() is called directly,
8111        // usually because this instance is an editable field in a list
8112        if (!mDispatchTemporaryDetach) mTemporaryDetach = false;
8113    }
8114
8115    @Override
8116    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
8117        if (mTemporaryDetach) {
8118            // If we are temporarily in the detach state, then do nothing.
8119            super.onFocusChanged(focused, direction, previouslyFocusedRect);
8120            return;
8121        }
8122
8123        mShowCursor = SystemClock.uptimeMillis();
8124
8125        ensureEndedBatchEdit();
8126
8127        if (focused) {
8128            int selStart = getSelectionStart();
8129            int selEnd = getSelectionEnd();
8130
8131            // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection
8132            // mode for these, unless there was a specific selection already started.
8133            final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 &&
8134                    selEnd == mText.length();
8135            mCreatedWithASelection = mFrozenWithFocus && hasSelection() && !isFocusHighlighted;
8136
8137            if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) {
8138                // If a tap was used to give focus to that view, move cursor at tap position.
8139                // Has to be done before onTakeFocus, which can be overloaded.
8140                final int lastTapPosition = getLastTapPosition();
8141                if (lastTapPosition >= 0) {
8142                    Selection.setSelection((Spannable) mText, lastTapPosition);
8143                }
8144
8145                if (mMovement != null) {
8146                    mMovement.onTakeFocus(this, (Spannable) mText, direction);
8147                }
8148
8149                // The DecorView does not have focus when the 'Done' ExtractEditText button is
8150                // pressed. Since it is the ViewAncestor's mView, it requests focus before
8151                // ExtractEditText clears focus, which gives focus to the ExtractEditText.
8152                // This special case ensure that we keep current selection in that case.
8153                // It would be better to know why the DecorView does not have focus at that time.
8154                if (((this instanceof ExtractEditText) || mSelectionMoved) &&
8155                        selStart >= 0 && selEnd >= 0) {
8156                    /*
8157                     * Someone intentionally set the selection, so let them
8158                     * do whatever it is that they wanted to do instead of
8159                     * the default on-focus behavior.  We reset the selection
8160                     * here instead of just skipping the onTakeFocus() call
8161                     * because some movement methods do something other than
8162                     * just setting the selection in theirs and we still
8163                     * need to go through that path.
8164                     */
8165                    Selection.setSelection((Spannable) mText, selStart, selEnd);
8166                }
8167
8168                if (mSelectAllOnFocus) {
8169                    selectAll();
8170                }
8171
8172                mTouchFocusSelected = true;
8173            }
8174
8175            mFrozenWithFocus = false;
8176            mSelectionMoved = false;
8177
8178            if (mText instanceof Spannable) {
8179                Spannable sp = (Spannable) mText;
8180                MetaKeyKeyListener.resetMetaState(sp);
8181            }
8182
8183            makeBlink();
8184
8185            if (mError != null) {
8186                showError();
8187            }
8188        } else {
8189            if (mError != null) {
8190                hideError();
8191            }
8192            // Don't leave us in the middle of a batch edit.
8193            onEndBatchEdit();
8194
8195            if (this instanceof ExtractEditText) {
8196                // terminateTextSelectionMode removes selection, which we want to keep when
8197                // ExtractEditText goes out of focus.
8198                final int selStart = getSelectionStart();
8199                final int selEnd = getSelectionEnd();
8200                hideControllers();
8201                Selection.setSelection((Spannable) mText, selStart, selEnd);
8202            } else {
8203                hideControllers();
8204                downgradeEasyCorrectionSpans();
8205            }
8206
8207            // No need to create the controller
8208            if (mSelectionModifierCursorController != null) {
8209                mSelectionModifierCursorController.resetTouchOffsets();
8210            }
8211        }
8212
8213        startStopMarquee(focused);
8214
8215        if (mTransformation != null) {
8216            mTransformation.onFocusChanged(this, mText, focused, direction, previouslyFocusedRect);
8217        }
8218
8219        super.onFocusChanged(focused, direction, previouslyFocusedRect);
8220    }
8221
8222    private int getLastTapPosition() {
8223        // No need to create the controller at that point, no last tap position saved
8224        if (mSelectionModifierCursorController != null) {
8225            int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset();
8226            if (lastTapPosition >= 0) {
8227                // Safety check, should not be possible.
8228                if (lastTapPosition > mText.length()) {
8229                    Log.e(LOG_TAG, "Invalid tap focus position (" + lastTapPosition + " vs "
8230                            + mText.length() + ")");
8231                    lastTapPosition = mText.length();
8232                }
8233                return lastTapPosition;
8234            }
8235        }
8236
8237        return -1;
8238    }
8239
8240    @Override
8241    public void onWindowFocusChanged(boolean hasWindowFocus) {
8242        super.onWindowFocusChanged(hasWindowFocus);
8243
8244        if (hasWindowFocus) {
8245            if (mBlink != null) {
8246                mBlink.uncancel();
8247                makeBlink();
8248            }
8249        } else {
8250            if (mBlink != null) {
8251                mBlink.cancel();
8252            }
8253            // Don't leave us in the middle of a batch edit.
8254            onEndBatchEdit();
8255            if (mInputContentType != null) {
8256                mInputContentType.enterDown = false;
8257            }
8258
8259            hideControllers();
8260            if (mSuggestionsPopupWindow != null) {
8261                mSuggestionsPopupWindow.onParentLostFocus();
8262            }
8263        }
8264
8265        startStopMarquee(hasWindowFocus);
8266    }
8267
8268    @Override
8269    protected void onVisibilityChanged(View changedView, int visibility) {
8270        super.onVisibilityChanged(changedView, visibility);
8271        if (visibility != VISIBLE) {
8272            hideControllers();
8273        }
8274    }
8275
8276    /**
8277     * Use {@link BaseInputConnection#removeComposingSpans
8278     * BaseInputConnection.removeComposingSpans()} to remove any IME composing
8279     * state from this text view.
8280     */
8281    public void clearComposingText() {
8282        if (mText instanceof Spannable) {
8283            BaseInputConnection.removeComposingSpans((Spannable)mText);
8284        }
8285    }
8286
8287    @Override
8288    public void setSelected(boolean selected) {
8289        boolean wasSelected = isSelected();
8290
8291        super.setSelected(selected);
8292
8293        if (selected != wasSelected && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
8294            if (selected) {
8295                startMarquee();
8296            } else {
8297                stopMarquee();
8298            }
8299        }
8300    }
8301
8302    @Override
8303    public boolean onTouchEvent(MotionEvent event) {
8304        final int action = event.getActionMasked();
8305
8306        if (hasSelectionController()) {
8307            getSelectionController().onTouchEvent(event);
8308        }
8309
8310        if (action == MotionEvent.ACTION_DOWN) {
8311            mLastDownPositionX = event.getX();
8312            mLastDownPositionY = event.getY();
8313
8314            // Reset this state; it will be re-set if super.onTouchEvent
8315            // causes focus to move to the view.
8316            mTouchFocusSelected = false;
8317            mIgnoreActionUpEvent = false;
8318        }
8319
8320        final boolean superResult = super.onTouchEvent(event);
8321
8322        /*
8323         * Don't handle the release after a long press, because it will
8324         * move the selection away from whatever the menu action was
8325         * trying to affect.
8326         */
8327        if (mDiscardNextActionUp && action == MotionEvent.ACTION_UP) {
8328            mDiscardNextActionUp = false;
8329            return superResult;
8330        }
8331
8332        final boolean touchIsFinished = (action == MotionEvent.ACTION_UP) &&
8333                !shouldIgnoreActionUpEvent() && isFocused();
8334
8335         if ((mMovement != null || onCheckIsTextEditor()) && isEnabled()
8336                && mText instanceof Spannable && mLayout != null) {
8337            boolean handled = false;
8338
8339            if (mMovement != null) {
8340                handled |= mMovement.onTouchEvent(this, (Spannable) mText, event);
8341            }
8342
8343            if (touchIsFinished && mLinksClickable && mAutoLinkMask != 0 && mTextIsSelectable) {
8344                // The LinkMovementMethod which should handle taps on links has not been installed
8345                // on non editable text that support text selection.
8346                // We reproduce its behavior here to open links for these.
8347                ClickableSpan[] links = ((Spannable) mText).getSpans(getSelectionStart(),
8348                        getSelectionEnd(), ClickableSpan.class);
8349
8350                if (links.length != 0) {
8351                    links[0].onClick(this);
8352                    handled = true;
8353                }
8354            }
8355
8356            if (touchIsFinished && (isTextEditable() || mTextIsSelectable)) {
8357                // Show the IME, except when selecting in read-only text.
8358                final InputMethodManager imm = InputMethodManager.peekInstance();
8359                viewClicked(imm);
8360                if (!mTextIsSelectable && mSoftInputShownOnFocus) {
8361                    handled |= imm != null && imm.showSoftInput(this, 0);
8362                }
8363
8364                boolean selectAllGotFocus = mSelectAllOnFocus && didTouchFocusSelect();
8365                hideControllers();
8366                if (!selectAllGotFocus && mText.length() > 0) {
8367                    if (mSpellChecker != null) {
8368                        // When the cursor moves, the word that was typed may need spell check
8369                        mSpellChecker.onSelectionChanged();
8370                    }
8371                    if (!extractedTextModeWillBeStarted()) {
8372                        if (isCursorInsideEasyCorrectionSpan()) {
8373                            showSuggestions();
8374                        } else if (hasInsertionController()) {
8375                            getInsertionController().show();
8376                        }
8377                    }
8378                }
8379
8380                handled = true;
8381            }
8382
8383            if (handled) {
8384                return true;
8385            }
8386        }
8387
8388        return superResult;
8389    }
8390
8391    /**
8392     * @return <code>true</code> if the cursor/current selection overlaps a {@link SuggestionSpan}.
8393     */
8394    private boolean isCursorInsideSuggestionSpan() {
8395        if (!(mText instanceof Spannable)) return false;
8396
8397        SuggestionSpan[] suggestionSpans = ((Spannable) mText).getSpans(getSelectionStart(),
8398                getSelectionEnd(), SuggestionSpan.class);
8399        return (suggestionSpans.length > 0);
8400    }
8401
8402    /**
8403     * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with
8404     * {@link SuggestionSpan#FLAG_EASY_CORRECT} set.
8405     */
8406    private boolean isCursorInsideEasyCorrectionSpan() {
8407        Spannable spannable = (Spannable) mText;
8408        SuggestionSpan[] suggestionSpans = spannable.getSpans(getSelectionStart(),
8409                getSelectionEnd(), SuggestionSpan.class);
8410        for (int i = 0; i < suggestionSpans.length; i++) {
8411            if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) {
8412                return true;
8413            }
8414        }
8415        return false;
8416    }
8417
8418    /**
8419     * Downgrades to simple suggestions all the easy correction spans that are not a spell check
8420     * span.
8421     */
8422    private void downgradeEasyCorrectionSpans() {
8423        if (mText instanceof Spannable) {
8424            Spannable spannable = (Spannable) mText;
8425            SuggestionSpan[] suggestionSpans = spannable.getSpans(0,
8426                    spannable.length(), SuggestionSpan.class);
8427            for (int i = 0; i < suggestionSpans.length; i++) {
8428                int flags = suggestionSpans[i].getFlags();
8429                if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0
8430                        && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) {
8431                    flags &= ~SuggestionSpan.FLAG_EASY_CORRECT;
8432                    suggestionSpans[i].setFlags(flags);
8433                }
8434            }
8435        }
8436    }
8437
8438    @Override
8439    public boolean onGenericMotionEvent(MotionEvent event) {
8440        if (mMovement != null && mText instanceof Spannable && mLayout != null) {
8441            try {
8442                if (mMovement.onGenericMotionEvent(this, (Spannable) mText, event)) {
8443                    return true;
8444                }
8445            } catch (AbstractMethodError ex) {
8446                // onGenericMotionEvent was added to the MovementMethod interface in API 12.
8447                // Ignore its absence in case third party applications implemented the
8448                // interface directly.
8449            }
8450        }
8451        return super.onGenericMotionEvent(event);
8452    }
8453
8454    private void prepareCursorControllers() {
8455        boolean windowSupportsHandles = false;
8456
8457        ViewGroup.LayoutParams params = getRootView().getLayoutParams();
8458        if (params instanceof WindowManager.LayoutParams) {
8459            WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params;
8460            windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW
8461                    || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW;
8462        }
8463
8464        mInsertionControllerEnabled = windowSupportsHandles && isCursorVisible() && mLayout != null;
8465        mSelectionControllerEnabled = windowSupportsHandles && textCanBeSelected() &&
8466                mLayout != null;
8467
8468        if (!mInsertionControllerEnabled) {
8469            hideInsertionPointCursorController();
8470            if (mInsertionPointCursorController != null) {
8471                mInsertionPointCursorController.onDetached();
8472                mInsertionPointCursorController = null;
8473            }
8474        }
8475
8476        if (!mSelectionControllerEnabled) {
8477            stopSelectionActionMode();
8478            if (mSelectionModifierCursorController != null) {
8479                mSelectionModifierCursorController.onDetached();
8480                mSelectionModifierCursorController = null;
8481            }
8482        }
8483    }
8484
8485    /**
8486     * @return True iff this TextView contains a text that can be edited, or if this is
8487     * a selectable TextView.
8488     */
8489    private boolean isTextEditable() {
8490        return mText instanceof Editable && onCheckIsTextEditor() && isEnabled();
8491    }
8492
8493    /**
8494     * Returns true, only while processing a touch gesture, if the initial
8495     * touch down event caused focus to move to the text view and as a result
8496     * its selection changed.  Only valid while processing the touch gesture
8497     * of interest.
8498     */
8499    public boolean didTouchFocusSelect() {
8500        return mTouchFocusSelected;
8501    }
8502
8503    @Override
8504    public void cancelLongPress() {
8505        super.cancelLongPress();
8506        mIgnoreActionUpEvent = true;
8507    }
8508
8509    /**
8510     * This method is only valid during a touch event.
8511     *
8512     * @return true when the ACTION_UP event should be ignored, false otherwise.
8513     *
8514     * @hide
8515     */
8516    public boolean shouldIgnoreActionUpEvent() {
8517        return mIgnoreActionUpEvent;
8518    }
8519
8520    @Override
8521    public boolean onTrackballEvent(MotionEvent event) {
8522        if (mMovement != null && mText instanceof Spannable &&
8523            mLayout != null) {
8524            if (mMovement.onTrackballEvent(this, (Spannable) mText, event)) {
8525                return true;
8526            }
8527        }
8528
8529        return super.onTrackballEvent(event);
8530    }
8531
8532    public void setScroller(Scroller s) {
8533        mScroller = s;
8534    }
8535
8536    private static class Blink extends Handler implements Runnable {
8537        private final WeakReference<TextView> mView;
8538        private boolean mCancelled;
8539
8540        public Blink(TextView v) {
8541            mView = new WeakReference<TextView>(v);
8542        }
8543
8544        public void run() {
8545            if (mCancelled) {
8546                return;
8547            }
8548
8549            removeCallbacks(Blink.this);
8550
8551            TextView tv = mView.get();
8552
8553            if (tv != null && tv.shouldBlink()) {
8554                if (tv.mLayout != null) {
8555                    tv.invalidateCursorPath();
8556                }
8557
8558                postAtTime(this, SystemClock.uptimeMillis() + BLINK);
8559            }
8560        }
8561
8562        void cancel() {
8563            if (!mCancelled) {
8564                removeCallbacks(Blink.this);
8565                mCancelled = true;
8566            }
8567        }
8568
8569        void uncancel() {
8570            mCancelled = false;
8571        }
8572    }
8573
8574    /**
8575     * @return True when the TextView isFocused and has a valid zero-length selection (cursor).
8576     */
8577    private boolean shouldBlink() {
8578        if (!isFocused()) return false;
8579
8580        final int start = getSelectionStart();
8581        if (start < 0) return false;
8582
8583        final int end = getSelectionEnd();
8584        if (end < 0) return false;
8585
8586        return start == end;
8587    }
8588
8589    private void makeBlink() {
8590        if (isCursorVisible()) {
8591            if (shouldBlink()) {
8592                mShowCursor = SystemClock.uptimeMillis();
8593                if (mBlink == null) mBlink = new Blink(this);
8594                mBlink.removeCallbacks(mBlink);
8595                mBlink.postAtTime(mBlink, mShowCursor + BLINK);
8596            }
8597        } else {
8598            if (mBlink != null) mBlink.removeCallbacks(mBlink);
8599        }
8600    }
8601
8602    @Override
8603    protected float getLeftFadingEdgeStrength() {
8604        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
8605        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
8606                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
8607            if (mMarquee != null && !mMarquee.isStopped()) {
8608                final Marquee marquee = mMarquee;
8609                if (marquee.shouldDrawLeftFade()) {
8610                    return marquee.mScroll / getHorizontalFadingEdgeLength();
8611                } else {
8612                    return 0.0f;
8613                }
8614            } else if (getLineCount() == 1) {
8615                final int layoutDirection = getResolvedLayoutDirection();
8616                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8617                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8618                    case Gravity.LEFT:
8619                        return 0.0f;
8620                    case Gravity.RIGHT:
8621                        return (mLayout.getLineRight(0) - (mRight - mLeft) -
8622                                getCompoundPaddingLeft() - getCompoundPaddingRight() -
8623                                mLayout.getLineLeft(0)) / getHorizontalFadingEdgeLength();
8624                    case Gravity.CENTER_HORIZONTAL:
8625                        return 0.0f;
8626                }
8627            }
8628        }
8629        return super.getLeftFadingEdgeStrength();
8630    }
8631
8632    @Override
8633    protected float getRightFadingEdgeStrength() {
8634        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
8635        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
8636                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
8637            if (mMarquee != null && !mMarquee.isStopped()) {
8638                final Marquee marquee = mMarquee;
8639                return (marquee.mMaxFadeScroll - marquee.mScroll) / getHorizontalFadingEdgeLength();
8640            } else if (getLineCount() == 1) {
8641                final int layoutDirection = getResolvedLayoutDirection();
8642                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8643                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8644                    case Gravity.LEFT:
8645                        final int textWidth = (mRight - mLeft) - getCompoundPaddingLeft() -
8646                                getCompoundPaddingRight();
8647                        final float lineWidth = mLayout.getLineWidth(0);
8648                        return (lineWidth - textWidth) / getHorizontalFadingEdgeLength();
8649                    case Gravity.RIGHT:
8650                        return 0.0f;
8651                    case Gravity.CENTER_HORIZONTAL:
8652                    case Gravity.FILL_HORIZONTAL:
8653                        return (mLayout.getLineWidth(0) - ((mRight - mLeft) -
8654                                getCompoundPaddingLeft() - getCompoundPaddingRight())) /
8655                                getHorizontalFadingEdgeLength();
8656                }
8657            }
8658        }
8659        return super.getRightFadingEdgeStrength();
8660    }
8661
8662    @Override
8663    protected int computeHorizontalScrollRange() {
8664        if (mLayout != null) {
8665            return mSingleLine && (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) == Gravity.LEFT ?
8666                    (int) mLayout.getLineWidth(0) : mLayout.getWidth();
8667        }
8668
8669        return super.computeHorizontalScrollRange();
8670    }
8671
8672    @Override
8673    protected int computeVerticalScrollRange() {
8674        if (mLayout != null)
8675            return mLayout.getHeight();
8676
8677        return super.computeVerticalScrollRange();
8678    }
8679
8680    @Override
8681    protected int computeVerticalScrollExtent() {
8682        return getHeight() - getCompoundPaddingTop() - getCompoundPaddingBottom();
8683    }
8684
8685    @Override
8686    public void findViewsWithText(ArrayList<View> outViews, CharSequence searched, int flags) {
8687        super.findViewsWithText(outViews, searched, flags);
8688        if (!outViews.contains(this) && (flags & FIND_VIEWS_WITH_TEXT) != 0
8689                && !TextUtils.isEmpty(searched) && !TextUtils.isEmpty(mText)) {
8690            String searchedLowerCase = searched.toString().toLowerCase();
8691            String textLowerCase = mText.toString().toLowerCase();
8692            if (textLowerCase.contains(searchedLowerCase)) {
8693                outViews.add(this);
8694            }
8695        }
8696    }
8697
8698    public enum BufferType {
8699        NORMAL, SPANNABLE, EDITABLE,
8700    }
8701
8702    /**
8703     * Returns the TextView_textColor attribute from the
8704     * Resources.StyledAttributes, if set, or the TextAppearance_textColor
8705     * from the TextView_textAppearance attribute, if TextView_textColor
8706     * was not set directly.
8707     */
8708    public static ColorStateList getTextColors(Context context, TypedArray attrs) {
8709        ColorStateList colors;
8710        colors = attrs.getColorStateList(com.android.internal.R.styleable.
8711                                         TextView_textColor);
8712
8713        if (colors == null) {
8714            int ap = attrs.getResourceId(com.android.internal.R.styleable.
8715                                         TextView_textAppearance, -1);
8716            if (ap != -1) {
8717                TypedArray appearance;
8718                appearance = context.obtainStyledAttributes(ap,
8719                                            com.android.internal.R.styleable.TextAppearance);
8720                colors = appearance.getColorStateList(com.android.internal.R.styleable.
8721                                                  TextAppearance_textColor);
8722                appearance.recycle();
8723            }
8724        }
8725
8726        return colors;
8727    }
8728
8729    /**
8730     * Returns the default color from the TextView_textColor attribute
8731     * from the AttributeSet, if set, or the default color from the
8732     * TextAppearance_textColor from the TextView_textAppearance attribute,
8733     * if TextView_textColor was not set directly.
8734     */
8735    public static int getTextColor(Context context,
8736                                   TypedArray attrs,
8737                                   int def) {
8738        ColorStateList colors = getTextColors(context, attrs);
8739
8740        if (colors == null) {
8741            return def;
8742        } else {
8743            return colors.getDefaultColor();
8744        }
8745    }
8746
8747    @Override
8748    public boolean onKeyShortcut(int keyCode, KeyEvent event) {
8749        final int filteredMetaState = event.getMetaState() & ~KeyEvent.META_CTRL_MASK;
8750        if (KeyEvent.metaStateHasNoModifiers(filteredMetaState)) {
8751            switch (keyCode) {
8752            case KeyEvent.KEYCODE_A:
8753                if (canSelectText()) {
8754                    return onTextContextMenuItem(ID_SELECT_ALL);
8755                }
8756                break;
8757            case KeyEvent.KEYCODE_X:
8758                if (canCut()) {
8759                    return onTextContextMenuItem(ID_CUT);
8760                }
8761                break;
8762            case KeyEvent.KEYCODE_C:
8763                if (canCopy()) {
8764                    return onTextContextMenuItem(ID_COPY);
8765                }
8766                break;
8767            case KeyEvent.KEYCODE_V:
8768                if (canPaste()) {
8769                    return onTextContextMenuItem(ID_PASTE);
8770                }
8771                break;
8772            }
8773        }
8774        return super.onKeyShortcut(keyCode, event);
8775    }
8776
8777    /**
8778     * Unlike {@link #textCanBeSelected()}, this method is based on the <i>current</i> state of the
8779     * TextView. {@link #textCanBeSelected()} has to be true (this is one of the conditions to have
8780     * a selection controller (see {@link #prepareCursorControllers()}), but this is not sufficient.
8781     */
8782    private boolean canSelectText() {
8783        return hasSelectionController() && mText.length() != 0;
8784    }
8785
8786    /**
8787     * Test based on the <i>intrinsic</i> charateristics of the TextView.
8788     * The text must be spannable and the movement method must allow for arbitary selection.
8789     *
8790     * See also {@link #canSelectText()}.
8791     */
8792    private boolean textCanBeSelected() {
8793        // prepareCursorController() relies on this method.
8794        // If you change this condition, make sure prepareCursorController is called anywhere
8795        // the value of this condition might be changed.
8796        if (mMovement == null || !mMovement.canSelectArbitrarily()) return false;
8797        return isTextEditable() || (mTextIsSelectable && mText instanceof Spannable && isEnabled());
8798    }
8799
8800    private boolean canCut() {
8801        if (hasPasswordTransformationMethod()) {
8802            return false;
8803        }
8804
8805        if (mText.length() > 0 && hasSelection() && mText instanceof Editable && mInput != null) {
8806            return true;
8807        }
8808
8809        return false;
8810    }
8811
8812    private boolean canCopy() {
8813        if (hasPasswordTransformationMethod()) {
8814            return false;
8815        }
8816
8817        if (mText.length() > 0 && hasSelection()) {
8818            return true;
8819        }
8820
8821        return false;
8822    }
8823
8824    private boolean canPaste() {
8825        return (mText instanceof Editable &&
8826                mInput != null &&
8827                getSelectionStart() >= 0 &&
8828                getSelectionEnd() >= 0 &&
8829                ((ClipboardManager)getContext().getSystemService(Context.CLIPBOARD_SERVICE)).
8830                hasPrimaryClip());
8831    }
8832
8833    private static long packRangeInLong(int start, int end) {
8834        return (((long) start) << 32) | end;
8835    }
8836
8837    private static int extractRangeStartFromLong(long range) {
8838        return (int) (range >>> 32);
8839    }
8840
8841    private static int extractRangeEndFromLong(long range) {
8842        return (int) (range & 0x00000000FFFFFFFFL);
8843    }
8844
8845    private boolean selectAll() {
8846        final int length = mText.length();
8847        Selection.setSelection((Spannable) mText, 0, length);
8848        return length > 0;
8849    }
8850
8851    /**
8852     * Adjusts selection to the word under last touch offset.
8853     * Return true if the operation was successfully performed.
8854     */
8855    private boolean selectCurrentWord() {
8856        if (!canSelectText()) {
8857            return false;
8858        }
8859
8860        if (hasPasswordTransformationMethod()) {
8861            // Always select all on a password field.
8862            // Cut/copy menu entries are not available for passwords, but being able to select all
8863            // is however useful to delete or paste to replace the entire content.
8864            return selectAll();
8865        }
8866
8867        int klass = mInputType & InputType.TYPE_MASK_CLASS;
8868        int variation = mInputType & InputType.TYPE_MASK_VARIATION;
8869
8870        // Specific text field types: select the entire text for these
8871        if (klass == InputType.TYPE_CLASS_NUMBER ||
8872                klass == InputType.TYPE_CLASS_PHONE ||
8873                klass == InputType.TYPE_CLASS_DATETIME ||
8874                variation == InputType.TYPE_TEXT_VARIATION_URI ||
8875                variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS ||
8876                variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS ||
8877                variation == InputType.TYPE_TEXT_VARIATION_FILTER) {
8878            return selectAll();
8879        }
8880
8881        long lastTouchOffsets = getLastTouchOffsets();
8882        final int minOffset = extractRangeStartFromLong(lastTouchOffsets);
8883        final int maxOffset = extractRangeEndFromLong(lastTouchOffsets);
8884
8885        // Safety check in case standard touch event handling has been bypassed
8886        if (minOffset < 0 || minOffset >= mText.length()) return false;
8887        if (maxOffset < 0 || maxOffset >= mText.length()) return false;
8888
8889        int selectionStart, selectionEnd;
8890
8891        // If a URLSpan (web address, email, phone...) is found at that position, select it.
8892        URLSpan[] urlSpans = ((Spanned) mText).getSpans(minOffset, maxOffset, URLSpan.class);
8893        if (urlSpans.length >= 1) {
8894            URLSpan urlSpan = urlSpans[0];
8895            selectionStart = ((Spanned) mText).getSpanStart(urlSpan);
8896            selectionEnd = ((Spanned) mText).getSpanEnd(urlSpan);
8897        } else {
8898            final WordIterator wordIterator = getWordIterator();
8899            wordIterator.setCharSequence(mText, minOffset, maxOffset);
8900
8901            selectionStart = wordIterator.getBeginning(minOffset);
8902            if (selectionStart == BreakIterator.DONE) return false;
8903
8904            selectionEnd = wordIterator.getEnd(maxOffset);
8905            if (selectionEnd == BreakIterator.DONE) return false;
8906
8907            if (selectionStart == selectionEnd) {
8908                // Possible when the word iterator does not properly handle the text's language
8909                long range = getCharRange(selectionStart);
8910                selectionStart = extractRangeStartFromLong(range);
8911                selectionEnd = extractRangeEndFromLong(range);
8912            }
8913        }
8914
8915        Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
8916        return selectionEnd > selectionStart;
8917    }
8918
8919    /**
8920     * This is a temporary method. Future versions may support multi-locale text.
8921     *
8922     * @return The locale that should be used for a word iterator and a spell checker
8923     * in this TextView, based on the current spell checker settings,
8924     * the current IME's locale, or the system default locale.
8925     * @hide
8926     */
8927    public Locale getTextServicesLocale() {
8928        Locale locale = Locale.getDefault();
8929        final TextServicesManager textServicesManager = (TextServicesManager)
8930                mContext.getSystemService(Context.TEXT_SERVICES_MANAGER_SERVICE);
8931        final SpellCheckerSubtype subtype = textServicesManager.getCurrentSpellCheckerSubtype(true);
8932        if (subtype != null) {
8933            locale = new Locale(subtype.getLocale());
8934        }
8935        return locale;
8936    }
8937
8938    void onLocaleChanged() {
8939        removeMisspelledSpans((Editable) mText);
8940        // Will be re-created on demand in getWordIterator with the proper new locale
8941        mWordIterator = null;
8942    }
8943
8944    /**
8945     * @hide
8946     */
8947    public WordIterator getWordIterator() {
8948        if (mWordIterator == null) {
8949            mWordIterator = new WordIterator(getTextServicesLocale());
8950        }
8951        return mWordIterator;
8952    }
8953
8954    private long getCharRange(int offset) {
8955        final int textLength = mText.length();
8956        if (offset + 1 < textLength) {
8957            final char currentChar = mText.charAt(offset);
8958            final char nextChar = mText.charAt(offset + 1);
8959            if (Character.isSurrogatePair(currentChar, nextChar)) {
8960                return packRangeInLong(offset,  offset + 2);
8961            }
8962        }
8963        if (offset < textLength) {
8964            return packRangeInLong(offset,  offset + 1);
8965        }
8966        if (offset - 2 >= 0) {
8967            final char previousChar = mText.charAt(offset - 1);
8968            final char previousPreviousChar = mText.charAt(offset - 2);
8969            if (Character.isSurrogatePair(previousPreviousChar, previousChar)) {
8970                return packRangeInLong(offset - 2,  offset);
8971            }
8972        }
8973        if (offset - 1 >= 0) {
8974            return packRangeInLong(offset - 1,  offset);
8975        }
8976        return packRangeInLong(offset,  offset);
8977    }
8978
8979    private SpellChecker getSpellChecker() {
8980        if (mSpellChecker == null) {
8981            mSpellChecker = new SpellChecker(this);
8982        }
8983        return mSpellChecker;
8984    }
8985
8986    private long getLastTouchOffsets() {
8987        SelectionModifierCursorController selectionController = getSelectionController();
8988        final int minOffset = selectionController.getMinTouchOffset();
8989        final int maxOffset = selectionController.getMaxTouchOffset();
8990        return packRangeInLong(minOffset, maxOffset);
8991    }
8992
8993    @Override
8994    public void onPopulateAccessibilityEvent(AccessibilityEvent event) {
8995        super.onPopulateAccessibilityEvent(event);
8996
8997        final boolean isPassword = hasPasswordTransformationMethod();
8998        if (!isPassword) {
8999            CharSequence text = getTextForAccessibility();
9000            if (!TextUtils.isEmpty(text)) {
9001                event.getText().add(text);
9002            }
9003        }
9004    }
9005
9006    @Override
9007    public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
9008        super.onInitializeAccessibilityEvent(event);
9009
9010        final boolean isPassword = hasPasswordTransformationMethod();
9011        event.setPassword(isPassword);
9012
9013        if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED) {
9014            event.setFromIndex(Selection.getSelectionStart(mText));
9015            event.setToIndex(Selection.getSelectionEnd(mText));
9016            event.setItemCount(mText.length());
9017        }
9018    }
9019
9020    @Override
9021    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
9022        super.onInitializeAccessibilityNodeInfo(info);
9023
9024        final boolean isPassword = hasPasswordTransformationMethod();
9025        if (!isPassword) {
9026            info.setText(getTextForAccessibility());
9027        }
9028        info.setPassword(isPassword);
9029    }
9030
9031    @Override
9032    public void sendAccessibilityEvent(int eventType) {
9033        // Do not send scroll events since first they are not interesting for
9034        // accessibility and second such events a generated too frequently.
9035        // For details see the implementation of bringTextIntoView().
9036        if (eventType == AccessibilityEvent.TYPE_VIEW_SCROLLED) {
9037            return;
9038        }
9039        super.sendAccessibilityEvent(eventType);
9040    }
9041
9042    /**
9043     * Gets the text reported for accessibility purposes. It is the
9044     * text if not empty or the hint.
9045     *
9046     * @return The accessibility text.
9047     */
9048    private CharSequence getTextForAccessibility() {
9049        CharSequence text = getText();
9050        if (TextUtils.isEmpty(text)) {
9051            text = getHint();
9052        }
9053        return text;
9054    }
9055
9056    void sendAccessibilityEventTypeViewTextChanged(CharSequence beforeText,
9057            int fromIndex, int removedCount, int addedCount) {
9058        AccessibilityEvent event =
9059            AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
9060        event.setFromIndex(fromIndex);
9061        event.setRemovedCount(removedCount);
9062        event.setAddedCount(addedCount);
9063        event.setBeforeText(beforeText);
9064        sendAccessibilityEventUnchecked(event);
9065    }
9066
9067    /**
9068     * Returns whether this text view is a current input method target.  The
9069     * default implementation just checks with {@link InputMethodManager}.
9070     */
9071    public boolean isInputMethodTarget() {
9072        InputMethodManager imm = InputMethodManager.peekInstance();
9073        return imm != null && imm.isActive(this);
9074    }
9075
9076    // Selection context mode
9077    private static final int ID_SELECT_ALL = android.R.id.selectAll;
9078    private static final int ID_CUT = android.R.id.cut;
9079    private static final int ID_COPY = android.R.id.copy;
9080    private static final int ID_PASTE = android.R.id.paste;
9081
9082    /**
9083     * Called when a context menu option for the text view is selected.  Currently
9084     * this will be one of {@link android.R.id#selectAll}, {@link android.R.id#cut},
9085     * {@link android.R.id#copy} or {@link android.R.id#paste}.
9086     *
9087     * @return true if the context menu item action was performed.
9088     */
9089    public boolean onTextContextMenuItem(int id) {
9090        int min = 0;
9091        int max = mText.length();
9092
9093        if (isFocused()) {
9094            final int selStart = getSelectionStart();
9095            final int selEnd = getSelectionEnd();
9096
9097            min = Math.max(0, Math.min(selStart, selEnd));
9098            max = Math.max(0, Math.max(selStart, selEnd));
9099        }
9100
9101        switch (id) {
9102            case ID_SELECT_ALL:
9103                // This does not enter text selection mode. Text is highlighted, so that it can be
9104                // bulk edited, like selectAllOnFocus does. Returns true even if text is empty.
9105                selectAll();
9106                return true;
9107
9108            case ID_PASTE:
9109                paste(min, max);
9110                return true;
9111
9112            case ID_CUT:
9113                setPrimaryClip(ClipData.newPlainText(null, getTransformedText(min, max)));
9114                deleteText_internal(min, max);
9115                stopSelectionActionMode();
9116                return true;
9117
9118            case ID_COPY:
9119                setPrimaryClip(ClipData.newPlainText(null, getTransformedText(min, max)));
9120                stopSelectionActionMode();
9121                return true;
9122        }
9123        return false;
9124    }
9125
9126    private CharSequence getTransformedText(int start, int end) {
9127        return removeSuggestionSpans(mTransformed.subSequence(start, end));
9128    }
9129
9130    /**
9131     * Prepare text so that there are not zero or two spaces at beginning and end of region defined
9132     * by [min, max] when replacing this region by paste.
9133     * Note that if there were two spaces (or more) at that position before, they are kept. We just
9134     * make sure we do not add an extra one from the paste content.
9135     */
9136    private long prepareSpacesAroundPaste(int min, int max, CharSequence paste) {
9137        if (paste.length() > 0) {
9138            if (min > 0) {
9139                final char charBefore = mTransformed.charAt(min - 1);
9140                final char charAfter = paste.charAt(0);
9141
9142                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
9143                    // Two spaces at beginning of paste: remove one
9144                    final int originalLength = mText.length();
9145                    deleteText_internal(min - 1, min);
9146                    // Due to filters, there is no guarantee that exactly one character was
9147                    // removed: count instead.
9148                    final int delta = mText.length() - originalLength;
9149                    min += delta;
9150                    max += delta;
9151                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
9152                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
9153                    // No space at beginning of paste: add one
9154                    final int originalLength = mText.length();
9155                    replaceText_internal(min, min, " ");
9156                    // Taking possible filters into account as above.
9157                    final int delta = mText.length() - originalLength;
9158                    min += delta;
9159                    max += delta;
9160                }
9161            }
9162
9163            if (max < mText.length()) {
9164                final char charBefore = paste.charAt(paste.length() - 1);
9165                final char charAfter = mTransformed.charAt(max);
9166
9167                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
9168                    // Two spaces at end of paste: remove one
9169                    deleteText_internal(max, max + 1);
9170                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
9171                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
9172                    // No space at end of paste: add one
9173                    replaceText_internal(max, max, " ");
9174                }
9175            }
9176        }
9177
9178        return packRangeInLong(min, max);
9179    }
9180
9181    private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) {
9182        TextView shadowView = (TextView) inflate(mContext,
9183                com.android.internal.R.layout.text_drag_thumbnail, null);
9184
9185        if (shadowView == null) {
9186            throw new IllegalArgumentException("Unable to inflate text drag thumbnail");
9187        }
9188
9189        if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) {
9190            text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH);
9191        }
9192        shadowView.setText(text);
9193        shadowView.setTextColor(getTextColors());
9194
9195        shadowView.setTextAppearance(mContext, R.styleable.Theme_textAppearanceLarge);
9196        shadowView.setGravity(Gravity.CENTER);
9197
9198        shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
9199                ViewGroup.LayoutParams.WRAP_CONTENT));
9200
9201        final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
9202        shadowView.measure(size, size);
9203
9204        shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight());
9205        shadowView.invalidate();
9206        return new DragShadowBuilder(shadowView);
9207    }
9208
9209    private static class DragLocalState {
9210        public TextView sourceTextView;
9211        public int start, end;
9212
9213        public DragLocalState(TextView sourceTextView, int start, int end) {
9214            this.sourceTextView = sourceTextView;
9215            this.start = start;
9216            this.end = end;
9217        }
9218    }
9219
9220    @Override
9221    public boolean performLongClick() {
9222        boolean handled = false;
9223        boolean vibrate = true;
9224
9225        if (super.performLongClick()) {
9226            mDiscardNextActionUp = true;
9227            handled = true;
9228        }
9229
9230        // Long press in empty space moves cursor and shows the Paste affordance if available.
9231        if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) &&
9232                mInsertionControllerEnabled) {
9233            final int offset = getOffsetForPosition(mLastDownPositionX, mLastDownPositionY);
9234            stopSelectionActionMode();
9235            Selection.setSelection((Spannable) mText, offset);
9236            getInsertionController().showWithActionPopup();
9237            handled = true;
9238            vibrate = false;
9239        }
9240
9241        if (!handled && mSelectionActionMode != null) {
9242            if (touchPositionIsInSelection()) {
9243                // Start a drag
9244                final int start = getSelectionStart();
9245                final int end = getSelectionEnd();
9246                CharSequence selectedText = getTransformedText(start, end);
9247                ClipData data = ClipData.newPlainText(null, selectedText);
9248                DragLocalState localState = new DragLocalState(this, start, end);
9249                startDrag(data, getTextThumbnailBuilder(selectedText), localState, 0);
9250                stopSelectionActionMode();
9251            } else {
9252                getSelectionController().hide();
9253                selectCurrentWord();
9254                getSelectionController().show();
9255            }
9256            handled = true;
9257        }
9258
9259        // Start a new selection
9260        if (!handled) {
9261            vibrate = handled = startSelectionActionMode();
9262        }
9263
9264        if (vibrate) {
9265            performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
9266        }
9267
9268        if (handled) {
9269            mDiscardNextActionUp = true;
9270        }
9271
9272        return handled;
9273    }
9274
9275    private boolean touchPositionIsInSelection() {
9276        int selectionStart = getSelectionStart();
9277        int selectionEnd = getSelectionEnd();
9278
9279        if (selectionStart == selectionEnd) {
9280            return false;
9281        }
9282
9283        if (selectionStart > selectionEnd) {
9284            int tmp = selectionStart;
9285            selectionStart = selectionEnd;
9286            selectionEnd = tmp;
9287            Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
9288        }
9289
9290        SelectionModifierCursorController selectionController = getSelectionController();
9291        int minOffset = selectionController.getMinTouchOffset();
9292        int maxOffset = selectionController.getMaxTouchOffset();
9293
9294        return ((minOffset >= selectionStart) && (maxOffset < selectionEnd));
9295    }
9296
9297    private PositionListener getPositionListener() {
9298        if (mPositionListener == null) {
9299            mPositionListener = new PositionListener();
9300        }
9301        return mPositionListener;
9302    }
9303
9304    private interface TextViewPositionListener {
9305        public void updatePosition(int parentPositionX, int parentPositionY,
9306                boolean parentPositionChanged, boolean parentScrolled);
9307    }
9308
9309    private class PositionListener implements ViewTreeObserver.OnPreDrawListener {
9310        // 3 handles
9311        // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others)
9312        private final int MAXIMUM_NUMBER_OF_LISTENERS = 6;
9313        private TextViewPositionListener[] mPositionListeners =
9314                new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS];
9315        private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS];
9316        private boolean mPositionHasChanged = true;
9317        // Absolute position of the TextView with respect to its parent window
9318        private int mPositionX, mPositionY;
9319        private int mNumberOfListeners;
9320        private boolean mScrollHasChanged;
9321
9322        public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) {
9323            if (mNumberOfListeners == 0) {
9324                updatePosition();
9325                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
9326                vto.addOnPreDrawListener(this);
9327            }
9328
9329            int emptySlotIndex = -1;
9330            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
9331                TextViewPositionListener listener = mPositionListeners[i];
9332                if (listener == positionListener) {
9333                    return;
9334                } else if (emptySlotIndex < 0 && listener == null) {
9335                    emptySlotIndex = i;
9336                }
9337            }
9338
9339            mPositionListeners[emptySlotIndex] = positionListener;
9340            mCanMove[emptySlotIndex] = canMove;
9341            mNumberOfListeners++;
9342        }
9343
9344        public void removeSubscriber(TextViewPositionListener positionListener) {
9345            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
9346                if (mPositionListeners[i] == positionListener) {
9347                    mPositionListeners[i] = null;
9348                    mNumberOfListeners--;
9349                    break;
9350                }
9351            }
9352
9353            if (mNumberOfListeners == 0) {
9354                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
9355                vto.removeOnPreDrawListener(this);
9356            }
9357        }
9358
9359        public int getPositionX() {
9360            return mPositionX;
9361        }
9362
9363        public int getPositionY() {
9364            return mPositionY;
9365        }
9366
9367        @Override
9368        public boolean onPreDraw() {
9369            updatePosition();
9370
9371            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
9372                if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) {
9373                    TextViewPositionListener positionListener = mPositionListeners[i];
9374                    if (positionListener != null) {
9375                        positionListener.updatePosition(mPositionX, mPositionY,
9376                                mPositionHasChanged, mScrollHasChanged);
9377                    }
9378                }
9379            }
9380
9381            mScrollHasChanged = false;
9382            return true;
9383        }
9384
9385        private void updatePosition() {
9386            TextView.this.getLocationInWindow(mTempCoords);
9387
9388            mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY;
9389
9390            mPositionX = mTempCoords[0];
9391            mPositionY = mTempCoords[1];
9392        }
9393
9394        public void onScrollChanged() {
9395            mScrollHasChanged = true;
9396        }
9397    }
9398
9399    private boolean isPositionVisible(int positionX, int positionY) {
9400        synchronized (sTmpPosition) {
9401            final float[] position = sTmpPosition;
9402            position[0] = positionX;
9403            position[1] = positionY;
9404            View view = this;
9405
9406            while (view != null) {
9407                if (view != this) {
9408                    // Local scroll is already taken into account in positionX/Y
9409                    position[0] -= view.getScrollX();
9410                    position[1] -= view.getScrollY();
9411                }
9412
9413                if (position[0] < 0 || position[1] < 0 ||
9414                        position[0] > view.getWidth() || position[1] > view.getHeight()) {
9415                    return false;
9416                }
9417
9418                if (!view.getMatrix().isIdentity()) {
9419                    view.getMatrix().mapPoints(position);
9420                }
9421
9422                position[0] += view.getLeft();
9423                position[1] += view.getTop();
9424
9425                final ViewParent parent = view.getParent();
9426                if (parent instanceof View) {
9427                    view = (View) parent;
9428                } else {
9429                    // We've reached the ViewRoot, stop iterating
9430                    view = null;
9431                }
9432            }
9433        }
9434
9435        // We've been able to walk up the view hierarchy and the position was never clipped
9436        return true;
9437    }
9438
9439    private boolean isOffsetVisible(int offset) {
9440        final int line = mLayout.getLineForOffset(offset);
9441        final int lineBottom = mLayout.getLineBottom(line);
9442        final int primaryHorizontal = (int) mLayout.getPrimaryHorizontal(offset);
9443        return isPositionVisible(primaryHorizontal + viewportToContentHorizontalOffset(),
9444                lineBottom + viewportToContentVerticalOffset());
9445    }
9446
9447    @Override
9448    protected void onScrollChanged(int horiz, int vert, int oldHoriz, int oldVert) {
9449        super.onScrollChanged(horiz, vert, oldHoriz, oldVert);
9450        if (mPositionListener != null) {
9451            mPositionListener.onScrollChanged();
9452        }
9453    }
9454
9455    private abstract class PinnedPopupWindow implements TextViewPositionListener {
9456        protected PopupWindow mPopupWindow;
9457        protected ViewGroup mContentView;
9458        int mPositionX, mPositionY;
9459
9460        protected abstract void createPopupWindow();
9461        protected abstract void initContentView();
9462        protected abstract int getTextOffset();
9463        protected abstract int getVerticalLocalPosition(int line);
9464        protected abstract int clipVertically(int positionY);
9465
9466        public PinnedPopupWindow() {
9467            createPopupWindow();
9468
9469            mPopupWindow.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
9470            mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
9471            mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
9472
9473            initContentView();
9474
9475            LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
9476                    ViewGroup.LayoutParams.WRAP_CONTENT);
9477            mContentView.setLayoutParams(wrapContent);
9478
9479            mPopupWindow.setContentView(mContentView);
9480        }
9481
9482        public void show() {
9483            TextView.this.getPositionListener().addSubscriber(this, false /* offset is fixed */);
9484
9485            computeLocalPosition();
9486
9487            final PositionListener positionListener = TextView.this.getPositionListener();
9488            updatePosition(positionListener.getPositionX(), positionListener.getPositionY());
9489        }
9490
9491        protected void measureContent() {
9492            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9493            mContentView.measure(
9494                    View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels,
9495                            View.MeasureSpec.AT_MOST),
9496                    View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels,
9497                            View.MeasureSpec.AT_MOST));
9498        }
9499
9500        /* The popup window will be horizontally centered on the getTextOffset() and vertically
9501         * positioned according to viewportToContentHorizontalOffset.
9502         *
9503         * This method assumes that mContentView has properly been measured from its content. */
9504        private void computeLocalPosition() {
9505            measureContent();
9506            final int width = mContentView.getMeasuredWidth();
9507            final int offset = getTextOffset();
9508            mPositionX = (int) (mLayout.getPrimaryHorizontal(offset) - width / 2.0f);
9509            mPositionX += viewportToContentHorizontalOffset();
9510
9511            final int line = mLayout.getLineForOffset(offset);
9512            mPositionY = getVerticalLocalPosition(line);
9513            mPositionY += viewportToContentVerticalOffset();
9514        }
9515
9516        private void updatePosition(int parentPositionX, int parentPositionY) {
9517            int positionX = parentPositionX + mPositionX;
9518            int positionY = parentPositionY + mPositionY;
9519
9520            positionY = clipVertically(positionY);
9521
9522            // Horizontal clipping
9523            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9524            final int width = mContentView.getMeasuredWidth();
9525            positionX = Math.min(displayMetrics.widthPixels - width, positionX);
9526            positionX = Math.max(0, positionX);
9527
9528            if (isShowing()) {
9529                mPopupWindow.update(positionX, positionY, -1, -1);
9530            } else {
9531                mPopupWindow.showAtLocation(TextView.this, Gravity.NO_GRAVITY,
9532                        positionX, positionY);
9533            }
9534        }
9535
9536        public void hide() {
9537            mPopupWindow.dismiss();
9538            TextView.this.getPositionListener().removeSubscriber(this);
9539        }
9540
9541        @Override
9542        public void updatePosition(int parentPositionX, int parentPositionY,
9543                boolean parentPositionChanged, boolean parentScrolled) {
9544            // Either parentPositionChanged or parentScrolled is true, check if still visible
9545            if (isShowing() && isOffsetVisible(getTextOffset())) {
9546                if (parentScrolled) computeLocalPosition();
9547                updatePosition(parentPositionX, parentPositionY);
9548            } else {
9549                hide();
9550            }
9551        }
9552
9553        public boolean isShowing() {
9554            return mPopupWindow.isShowing();
9555        }
9556    }
9557
9558    private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener {
9559        private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE;
9560        private static final int ADD_TO_DICTIONARY = -1;
9561        private static final int DELETE_TEXT = -2;
9562        private SuggestionInfo[] mSuggestionInfos;
9563        private int mNumberOfSuggestions;
9564        private boolean mCursorWasVisibleBeforeSuggestions;
9565        private boolean mIsShowingUp = false;
9566        private SuggestionAdapter mSuggestionsAdapter;
9567        private final Comparator<SuggestionSpan> mSuggestionSpanComparator;
9568        private final HashMap<SuggestionSpan, Integer> mSpansLengths;
9569
9570        private class CustomPopupWindow extends PopupWindow {
9571            public CustomPopupWindow(Context context, int defStyle) {
9572                super(context, null, defStyle);
9573            }
9574
9575            @Override
9576            public void dismiss() {
9577                super.dismiss();
9578
9579                TextView.this.getPositionListener().removeSubscriber(SuggestionsPopupWindow.this);
9580
9581                // Safe cast since show() checks that mText is an Editable
9582                ((Spannable) mText).removeSpan(mSuggestionRangeSpan);
9583
9584                setCursorVisible(mCursorWasVisibleBeforeSuggestions);
9585                if (hasInsertionController()) {
9586                    getInsertionController().show();
9587                }
9588            }
9589        }
9590
9591        public SuggestionsPopupWindow() {
9592            mCursorWasVisibleBeforeSuggestions = mCursorVisible;
9593            mSuggestionSpanComparator = new SuggestionSpanComparator();
9594            mSpansLengths = new HashMap<SuggestionSpan, Integer>();
9595        }
9596
9597        @Override
9598        protected void createPopupWindow() {
9599            mPopupWindow = new CustomPopupWindow(TextView.this.mContext,
9600                com.android.internal.R.attr.textSuggestionsWindowStyle);
9601            mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
9602            mPopupWindow.setFocusable(true);
9603            mPopupWindow.setClippingEnabled(false);
9604        }
9605
9606        @Override
9607        protected void initContentView() {
9608            ListView listView = new ListView(TextView.this.getContext());
9609            mSuggestionsAdapter = new SuggestionAdapter();
9610            listView.setAdapter(mSuggestionsAdapter);
9611            listView.setOnItemClickListener(this);
9612            mContentView = listView;
9613
9614            // Inflate the suggestion items once and for all. + 2 for add to dictionary and delete
9615            mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS + 2];
9616            for (int i = 0; i < mSuggestionInfos.length; i++) {
9617                mSuggestionInfos[i] = new SuggestionInfo();
9618            }
9619        }
9620
9621        public boolean isShowingUp() {
9622            return mIsShowingUp;
9623        }
9624
9625        public void onParentLostFocus() {
9626            mIsShowingUp = false;
9627        }
9628
9629        private class SuggestionInfo {
9630            int suggestionStart, suggestionEnd; // range of actual suggestion within text
9631            SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents
9632            int suggestionIndex; // the index of this suggestion inside suggestionSpan
9633            SpannableStringBuilder text = new SpannableStringBuilder();
9634            TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mContext,
9635                    android.R.style.TextAppearance_SuggestionHighlight);
9636        }
9637
9638        private class SuggestionAdapter extends BaseAdapter {
9639            private LayoutInflater mInflater = (LayoutInflater) TextView.this.mContext.
9640                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
9641
9642            @Override
9643            public int getCount() {
9644                return mNumberOfSuggestions;
9645            }
9646
9647            @Override
9648            public Object getItem(int position) {
9649                return mSuggestionInfos[position];
9650            }
9651
9652            @Override
9653            public long getItemId(int position) {
9654                return position;
9655            }
9656
9657            @Override
9658            public View getView(int position, View convertView, ViewGroup parent) {
9659                TextView textView = (TextView) convertView;
9660
9661                if (textView == null) {
9662                    textView = (TextView) mInflater.inflate(mTextEditSuggestionItemLayout, parent,
9663                            false);
9664                }
9665
9666                final SuggestionInfo suggestionInfo = mSuggestionInfos[position];
9667                textView.setText(suggestionInfo.text);
9668
9669                if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) {
9670                    textView.setCompoundDrawablesWithIntrinsicBounds(
9671                            com.android.internal.R.drawable.ic_suggestions_add, 0, 0, 0);
9672                } else if (suggestionInfo.suggestionIndex == DELETE_TEXT) {
9673                    textView.setCompoundDrawablesWithIntrinsicBounds(
9674                            com.android.internal.R.drawable.ic_suggestions_delete, 0, 0, 0);
9675                } else {
9676                    textView.setCompoundDrawables(null, null, null, null);
9677                }
9678
9679                return textView;
9680            }
9681        }
9682
9683        private class SuggestionSpanComparator implements Comparator<SuggestionSpan> {
9684            public int compare(SuggestionSpan span1, SuggestionSpan span2) {
9685                final int flag1 = span1.getFlags();
9686                final int flag2 = span2.getFlags();
9687                if (flag1 != flag2) {
9688                    // The order here should match what is used in updateDrawState
9689                    final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0;
9690                    final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0;
9691                    final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0;
9692                    final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0;
9693                    if (easy1 && !misspelled1) return -1;
9694                    if (easy2 && !misspelled2) return 1;
9695                    if (misspelled1) return -1;
9696                    if (misspelled2) return 1;
9697                }
9698
9699                return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue();
9700            }
9701        }
9702
9703        /**
9704         * Returns the suggestion spans that cover the current cursor position. The suggestion
9705         * spans are sorted according to the length of text that they are attached to.
9706         */
9707        private SuggestionSpan[] getSuggestionSpans() {
9708            int pos = TextView.this.getSelectionStart();
9709            Spannable spannable = (Spannable) TextView.this.mText;
9710            SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class);
9711
9712            mSpansLengths.clear();
9713            for (SuggestionSpan suggestionSpan : suggestionSpans) {
9714                int start = spannable.getSpanStart(suggestionSpan);
9715                int end = spannable.getSpanEnd(suggestionSpan);
9716                mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start));
9717            }
9718
9719            // The suggestions are sorted according to their types (easy correction first, then
9720            // misspelled) and to the length of the text that they cover (shorter first).
9721            Arrays.sort(suggestionSpans, mSuggestionSpanComparator);
9722            return suggestionSpans;
9723        }
9724
9725        @Override
9726        public void show() {
9727            if (!(mText instanceof Editable)) return;
9728
9729            updateSuggestions();
9730            mCursorWasVisibleBeforeSuggestions = mCursorVisible;
9731            setCursorVisible(false);
9732            mIsShowingUp = true;
9733            super.show();
9734        }
9735
9736        @Override
9737        protected void measureContent() {
9738            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9739            final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec(
9740                    displayMetrics.widthPixels, View.MeasureSpec.AT_MOST);
9741            final int verticalMeasure = View.MeasureSpec.makeMeasureSpec(
9742                    displayMetrics.heightPixels, View.MeasureSpec.AT_MOST);
9743
9744            int width = 0;
9745            View view = null;
9746            for (int i = 0; i < mNumberOfSuggestions; i++) {
9747                view = mSuggestionsAdapter.getView(i, view, mContentView);
9748                view.getLayoutParams().width = LayoutParams.WRAP_CONTENT;
9749                view.measure(horizontalMeasure, verticalMeasure);
9750                width = Math.max(width, view.getMeasuredWidth());
9751            }
9752
9753            // Enforce the width based on actual text widths
9754            mContentView.measure(
9755                    View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY),
9756                    verticalMeasure);
9757
9758            Drawable popupBackground = mPopupWindow.getBackground();
9759            if (popupBackground != null) {
9760                if (mTempRect == null) mTempRect = new Rect();
9761                popupBackground.getPadding(mTempRect);
9762                width += mTempRect.left + mTempRect.right;
9763            }
9764            mPopupWindow.setWidth(width);
9765        }
9766
9767        @Override
9768        protected int getTextOffset() {
9769            return getSelectionStart();
9770        }
9771
9772        @Override
9773        protected int getVerticalLocalPosition(int line) {
9774            return mLayout.getLineBottom(line);
9775        }
9776
9777        @Override
9778        protected int clipVertically(int positionY) {
9779            final int height = mContentView.getMeasuredHeight();
9780            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9781            return Math.min(positionY, displayMetrics.heightPixels - height);
9782        }
9783
9784        @Override
9785        public void hide() {
9786            super.hide();
9787        }
9788
9789        private void updateSuggestions() {
9790            Spannable spannable = (Spannable) TextView.this.mText;
9791            SuggestionSpan[] suggestionSpans = getSuggestionSpans();
9792
9793            final int nbSpans = suggestionSpans.length;
9794
9795            mNumberOfSuggestions = 0;
9796            int spanUnionStart = mText.length();
9797            int spanUnionEnd = 0;
9798
9799            SuggestionSpan misspelledSpan = null;
9800            int underlineColor = 0;
9801
9802            for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) {
9803                SuggestionSpan suggestionSpan = suggestionSpans[spanIndex];
9804                final int spanStart = spannable.getSpanStart(suggestionSpan);
9805                final int spanEnd = spannable.getSpanEnd(suggestionSpan);
9806                spanUnionStart = Math.min(spanStart, spanUnionStart);
9807                spanUnionEnd = Math.max(spanEnd, spanUnionEnd);
9808
9809                if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) {
9810                    misspelledSpan = suggestionSpan;
9811                }
9812
9813                // The first span dictates the background color of the highlighted text
9814                if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor();
9815
9816                String[] suggestions = suggestionSpan.getSuggestions();
9817                int nbSuggestions = suggestions.length;
9818                for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) {
9819                    SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions];
9820                    suggestionInfo.suggestionSpan = suggestionSpan;
9821                    suggestionInfo.suggestionIndex = suggestionIndex;
9822                    suggestionInfo.text.replace(0, suggestionInfo.text.length(),
9823                            suggestions[suggestionIndex]);
9824
9825                    mNumberOfSuggestions++;
9826                    if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) {
9827                        // Also end outer for loop
9828                        spanIndex = nbSpans;
9829                        break;
9830                    }
9831                }
9832            }
9833
9834            for (int i = 0; i < mNumberOfSuggestions; i++) {
9835                highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd);
9836            }
9837
9838            // Add to dictionary item if there is a span with the misspelled flag
9839            if (misspelledSpan != null) {
9840                final int misspelledStart = spannable.getSpanStart(misspelledSpan);
9841                final int misspelledEnd = spannable.getSpanEnd(misspelledSpan);
9842                if (misspelledStart >= 0 && misspelledEnd > misspelledStart) {
9843                    SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions];
9844                    suggestionInfo.suggestionSpan = misspelledSpan;
9845                    suggestionInfo.suggestionIndex = ADD_TO_DICTIONARY;
9846                    suggestionInfo.text.replace(0, suggestionInfo.text.length(),
9847                            getContext().getString(com.android.internal.R.string.addToDictionary));
9848                    suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0,
9849                            Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9850
9851                    mNumberOfSuggestions++;
9852                }
9853            }
9854
9855            // Delete item
9856            SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions];
9857            suggestionInfo.suggestionSpan = null;
9858            suggestionInfo.suggestionIndex = DELETE_TEXT;
9859            suggestionInfo.text.replace(0, suggestionInfo.text.length(),
9860                    getContext().getString(com.android.internal.R.string.deleteText));
9861            suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0,
9862                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9863            mNumberOfSuggestions++;
9864
9865            if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan();
9866            if (underlineColor == 0) {
9867                // Fallback on the default highlight color when the first span does not provide one
9868                mSuggestionRangeSpan.setBackgroundColor(mHighlightColor);
9869            } else {
9870                final float BACKGROUND_TRANSPARENCY = 0.4f;
9871                final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY);
9872                mSuggestionRangeSpan.setBackgroundColor(
9873                        (underlineColor & 0x00FFFFFF) + (newAlpha << 24));
9874            }
9875            spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd,
9876                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9877
9878            mSuggestionsAdapter.notifyDataSetChanged();
9879        }
9880
9881        private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart,
9882                int unionEnd) {
9883            final Spannable text = (Spannable) mText;
9884            final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan);
9885            final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan);
9886
9887            // Adjust the start/end of the suggestion span
9888            suggestionInfo.suggestionStart = spanStart - unionStart;
9889            suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart
9890                    + suggestionInfo.text.length();
9891
9892            suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0,
9893                    suggestionInfo.text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9894
9895            // Add the text before and after the span.
9896            suggestionInfo.text.insert(0, mText.toString().substring(unionStart, spanStart));
9897            suggestionInfo.text.append(mText.toString().substring(spanEnd, unionEnd));
9898        }
9899
9900        @Override
9901        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
9902            Editable editable = (Editable) mText;
9903            SuggestionInfo suggestionInfo = mSuggestionInfos[position];
9904
9905            if (suggestionInfo.suggestionIndex == DELETE_TEXT) {
9906                final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan);
9907                int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan);
9908                if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) {
9909                    // Do not leave two adjacent spaces after deletion, or one at beginning of text
9910                    if (spanUnionEnd < editable.length() &&
9911                            Character.isSpaceChar(editable.charAt(spanUnionEnd)) &&
9912                            (spanUnionStart == 0 ||
9913                            Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) {
9914                        spanUnionEnd = spanUnionEnd + 1;
9915                    }
9916                    deleteText_internal(spanUnionStart, spanUnionEnd);
9917                }
9918                hide();
9919                return;
9920            }
9921
9922            final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan);
9923            final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan);
9924            if (spanStart < 0 || spanEnd <= spanStart) {
9925                // Span has been removed
9926                hide();
9927                return;
9928            }
9929            final String originalText = mText.toString().substring(spanStart, spanEnd);
9930
9931            if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) {
9932                Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT);
9933                intent.putExtra("word", originalText);
9934                intent.putExtra("locale", getTextServicesLocale().toString());
9935                intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK);
9936                getContext().startActivity(intent);
9937                // There is no way to know if the word was indeed added. Re-check.
9938                // TODO The ExtractEditText should remove the span in the original text instead
9939                editable.removeSpan(suggestionInfo.suggestionSpan);
9940                updateSpellCheckSpans(spanStart, spanEnd);
9941            } else {
9942                // SuggestionSpans are removed by replace: save them before
9943                SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd,
9944                        SuggestionSpan.class);
9945                final int length = suggestionSpans.length;
9946                int[] suggestionSpansStarts = new int[length];
9947                int[] suggestionSpansEnds = new int[length];
9948                int[] suggestionSpansFlags = new int[length];
9949                for (int i = 0; i < length; i++) {
9950                    final SuggestionSpan suggestionSpan = suggestionSpans[i];
9951                    suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan);
9952                    suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan);
9953                    suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan);
9954
9955                    // Remove potential misspelled flags
9956                    int suggestionSpanFlags = suggestionSpan.getFlags();
9957                    if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) {
9958                        suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED;
9959                        suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT;
9960                        suggestionSpan.setFlags(suggestionSpanFlags);
9961                    }
9962                }
9963
9964                final int suggestionStart = suggestionInfo.suggestionStart;
9965                final int suggestionEnd = suggestionInfo.suggestionEnd;
9966                final String suggestion = suggestionInfo.text.subSequence(
9967                        suggestionStart, suggestionEnd).toString();
9968                replaceText_internal(spanStart, spanEnd, suggestion);
9969
9970                // Notify source IME of the suggestion pick. Do this before swaping texts.
9971                if (!TextUtils.isEmpty(
9972                        suggestionInfo.suggestionSpan.getNotificationTargetClassName())) {
9973                    InputMethodManager imm = InputMethodManager.peekInstance();
9974                    if (imm != null) {
9975                        imm.notifySuggestionPicked(suggestionInfo.suggestionSpan, originalText,
9976                                suggestionInfo.suggestionIndex);
9977                    }
9978                }
9979
9980                // Swap text content between actual text and Suggestion span
9981                String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions();
9982                suggestions[suggestionInfo.suggestionIndex] = originalText;
9983
9984                // Restore previous SuggestionSpans
9985                final int lengthDifference = suggestion.length() - (spanEnd - spanStart);
9986                for (int i = 0; i < length; i++) {
9987                    // Only spans that include the modified region make sense after replacement
9988                    // Spans partially included in the replaced region are removed, there is no
9989                    // way to assign them a valid range after replacement
9990                    if (suggestionSpansStarts[i] <= spanStart &&
9991                            suggestionSpansEnds[i] >= spanEnd) {
9992                        setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i],
9993                                suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]);
9994                    }
9995                }
9996
9997                // Move cursor at the end of the replaced word
9998                final int newCursorPosition = spanEnd + lengthDifference;
9999                setCursorPosition_internal(newCursorPosition, newCursorPosition);
10000            }
10001
10002            hide();
10003        }
10004    }
10005
10006    /**
10007     * Removes the suggestion spans.
10008     */
10009    CharSequence removeSuggestionSpans(CharSequence text) {
10010       if (text instanceof Spanned) {
10011           Spannable spannable;
10012           if (text instanceof Spannable) {
10013               spannable = (Spannable) text;
10014           } else {
10015               spannable = new SpannableString(text);
10016               text = spannable;
10017           }
10018
10019           SuggestionSpan[] spans = spannable.getSpans(0, text.length(), SuggestionSpan.class);
10020           for (int i = 0; i < spans.length; i++) {
10021               spannable.removeSpan(spans[i]);
10022           }
10023       }
10024       return text;
10025    }
10026
10027    void showSuggestions() {
10028        if (mSuggestionsPopupWindow == null) {
10029            mSuggestionsPopupWindow = new SuggestionsPopupWindow();
10030        }
10031        hideControllers();
10032        mSuggestionsPopupWindow.show();
10033    }
10034
10035    boolean areSuggestionsShown() {
10036        return mSuggestionsPopupWindow != null && mSuggestionsPopupWindow.isShowing();
10037    }
10038
10039    /**
10040     * Return whether or not suggestions are enabled on this TextView. The suggestions are generated
10041     * by the IME or by the spell checker as the user types. This is done by adding
10042     * {@link SuggestionSpan}s to the text.
10043     *
10044     * When suggestions are enabled (default), this list of suggestions will be displayed when the
10045     * user asks for them on these parts of the text. This value depends on the inputType of this
10046     * TextView.
10047     *
10048     * The class of the input type must be {@link InputType#TYPE_CLASS_TEXT}.
10049     *
10050     * In addition, the type variation must be one of
10051     * {@link InputType#TYPE_TEXT_VARIATION_NORMAL},
10052     * {@link InputType#TYPE_TEXT_VARIATION_EMAIL_SUBJECT},
10053     * {@link InputType#TYPE_TEXT_VARIATION_LONG_MESSAGE},
10054     * {@link InputType#TYPE_TEXT_VARIATION_SHORT_MESSAGE} or
10055     * {@link InputType#TYPE_TEXT_VARIATION_WEB_EDIT_TEXT}.
10056     *
10057     * And finally, the {@link InputType#TYPE_TEXT_FLAG_NO_SUGGESTIONS} flag must <i>not</i> be set.
10058     *
10059     * @return true if the suggestions popup window is enabled, based on the inputType.
10060     */
10061    public boolean isSuggestionsEnabled() {
10062        if ((mInputType & InputType.TYPE_MASK_CLASS) != InputType.TYPE_CLASS_TEXT) return false;
10063        if ((mInputType & InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS) > 0) return false;
10064
10065        final int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
10066        return (variation == EditorInfo.TYPE_TEXT_VARIATION_NORMAL ||
10067                variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT ||
10068                variation == EditorInfo.TYPE_TEXT_VARIATION_LONG_MESSAGE ||
10069                variation == EditorInfo.TYPE_TEXT_VARIATION_SHORT_MESSAGE ||
10070                variation == EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT);
10071    }
10072
10073    /**
10074     * If provided, this ActionMode.Callback will be used to create the ActionMode when text
10075     * selection is initiated in this View.
10076     *
10077     * The standard implementation populates the menu with a subset of Select All, Cut, Copy and
10078     * Paste actions, depending on what this View supports.
10079     *
10080     * A custom implementation can add new entries in the default menu in its
10081     * {@link android.view.ActionMode.Callback#onPrepareActionMode(ActionMode, Menu)} method. The
10082     * default actions can also be removed from the menu using {@link Menu#removeItem(int)} and
10083     * passing {@link android.R.id#selectAll}, {@link android.R.id#cut}, {@link android.R.id#copy}
10084     * or {@link android.R.id#paste} ids as parameters.
10085     *
10086     * Returning false from
10087     * {@link android.view.ActionMode.Callback#onCreateActionMode(ActionMode, Menu)} will prevent
10088     * the action mode from being started.
10089     *
10090     * Action click events should be handled by the custom implementation of
10091     * {@link android.view.ActionMode.Callback#onActionItemClicked(ActionMode, MenuItem)}.
10092     *
10093     * Note that text selection mode is not started when a TextView receives focus and the
10094     * {@link android.R.attr#selectAllOnFocus} flag has been set. The content is highlighted in
10095     * that case, to allow for quick replacement.
10096     */
10097    public void setCustomSelectionActionModeCallback(ActionMode.Callback actionModeCallback) {
10098        mCustomSelectionActionModeCallback = actionModeCallback;
10099    }
10100
10101    /**
10102     * Retrieves the value set in {@link #setCustomSelectionActionModeCallback}. Default is null.
10103     *
10104     * @return The current custom selection callback.
10105     */
10106    public ActionMode.Callback getCustomSelectionActionModeCallback() {
10107        return mCustomSelectionActionModeCallback;
10108    }
10109
10110    /**
10111     *
10112     * @return true if the selection mode was actually started.
10113     */
10114    private boolean startSelectionActionMode() {
10115        if (mSelectionActionMode != null) {
10116            // Selection action mode is already started
10117            return false;
10118        }
10119
10120        if (!canSelectText() || !requestFocus()) {
10121            Log.w(LOG_TAG, "TextView does not support text selection. Action mode cancelled.");
10122            return false;
10123        }
10124
10125        if (!hasSelection()) {
10126            // There may already be a selection on device rotation
10127            if (!selectCurrentWord()) {
10128                // No word found under cursor or text selection not permitted.
10129                return false;
10130            }
10131        }
10132
10133        boolean willExtract = extractedTextModeWillBeStarted();
10134
10135        // Do not start the action mode when extracted text will show up full screen, thus
10136        // immediately hiding the newly created action bar, which would be visually distracting.
10137        if (!willExtract) {
10138            ActionMode.Callback actionModeCallback = new SelectionActionModeCallback();
10139            mSelectionActionMode = startActionMode(actionModeCallback);
10140        }
10141
10142        final boolean selectionStarted = mSelectionActionMode != null || willExtract;
10143        if (selectionStarted && !mTextIsSelectable && mSoftInputShownOnFocus) {
10144            // Show the IME to be able to replace text, except when selecting non editable text.
10145            final InputMethodManager imm = InputMethodManager.peekInstance();
10146            if (imm != null) {
10147                imm.showSoftInput(this, 0, null);
10148            }
10149        }
10150
10151        return selectionStarted;
10152    }
10153
10154    private boolean extractedTextModeWillBeStarted() {
10155        if (!(this instanceof ExtractEditText)) {
10156            final InputMethodManager imm = InputMethodManager.peekInstance();
10157            return  imm != null && imm.isFullscreenMode();
10158        }
10159        return false;
10160    }
10161
10162    private void stopSelectionActionMode() {
10163        if (mSelectionActionMode != null) {
10164            // This will hide the mSelectionModifierCursorController
10165            mSelectionActionMode.finish();
10166        }
10167    }
10168
10169    /**
10170     * Paste clipboard content between min and max positions.
10171     */
10172    private void paste(int min, int max) {
10173        ClipboardManager clipboard =
10174            (ClipboardManager) getContext().getSystemService(Context.CLIPBOARD_SERVICE);
10175        ClipData clip = clipboard.getPrimaryClip();
10176        if (clip != null) {
10177            boolean didFirst = false;
10178            for (int i=0; i<clip.getItemCount(); i++) {
10179                CharSequence paste = clip.getItemAt(i).coerceToText(getContext());
10180                if (paste != null) {
10181                    if (!didFirst) {
10182                        long minMax = prepareSpacesAroundPaste(min, max, paste);
10183                        min = extractRangeStartFromLong(minMax);
10184                        max = extractRangeEndFromLong(minMax);
10185                        Selection.setSelection((Spannable) mText, max);
10186                        ((Editable) mText).replace(min, max, paste);
10187                        didFirst = true;
10188                    } else {
10189                        ((Editable) mText).insert(getSelectionEnd(), "\n");
10190                        ((Editable) mText).insert(getSelectionEnd(), paste);
10191                    }
10192                }
10193            }
10194            stopSelectionActionMode();
10195            sLastCutOrCopyTime = 0;
10196        }
10197    }
10198
10199    private void setPrimaryClip(ClipData clip) {
10200        ClipboardManager clipboard = (ClipboardManager) getContext().
10201                getSystemService(Context.CLIPBOARD_SERVICE);
10202        clipboard.setPrimaryClip(clip);
10203        sLastCutOrCopyTime = SystemClock.uptimeMillis();
10204    }
10205
10206    /**
10207     * An ActionMode Callback class that is used to provide actions while in text selection mode.
10208     *
10209     * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending
10210     * on which of these this TextView supports.
10211     */
10212    private class SelectionActionModeCallback implements ActionMode.Callback {
10213
10214        @Override
10215        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
10216            TypedArray styledAttributes = mContext.obtainStyledAttributes(
10217                    com.android.internal.R.styleable.SelectionModeDrawables);
10218
10219            boolean allowText = getContext().getResources().getBoolean(
10220                    com.android.internal.R.bool.config_allowActionMenuItemTextWithIcon);
10221
10222            mode.setTitle(allowText ?
10223                    mContext.getString(com.android.internal.R.string.textSelectionCABTitle) : null);
10224            mode.setSubtitle(null);
10225
10226            int selectAllIconId = 0; // No icon by default
10227            if (!allowText) {
10228                // Provide an icon, text will not be displayed on smaller screens.
10229                selectAllIconId = styledAttributes.getResourceId(
10230                        R.styleable.SelectionModeDrawables_actionModeSelectAllDrawable, 0);
10231            }
10232
10233            menu.add(0, ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll).
10234                    setIcon(selectAllIconId).
10235                    setAlphabeticShortcut('a').
10236                    setShowAsAction(
10237                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10238
10239            if (canCut()) {
10240                menu.add(0, ID_CUT, 0, com.android.internal.R.string.cut).
10241                    setIcon(styledAttributes.getResourceId(
10242                            R.styleable.SelectionModeDrawables_actionModeCutDrawable, 0)).
10243                    setAlphabeticShortcut('x').
10244                    setShowAsAction(
10245                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10246            }
10247
10248            if (canCopy()) {
10249                menu.add(0, ID_COPY, 0, com.android.internal.R.string.copy).
10250                    setIcon(styledAttributes.getResourceId(
10251                            R.styleable.SelectionModeDrawables_actionModeCopyDrawable, 0)).
10252                    setAlphabeticShortcut('c').
10253                    setShowAsAction(
10254                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10255            }
10256
10257            if (canPaste()) {
10258                menu.add(0, ID_PASTE, 0, com.android.internal.R.string.paste).
10259                        setIcon(styledAttributes.getResourceId(
10260                                R.styleable.SelectionModeDrawables_actionModePasteDrawable, 0)).
10261                        setAlphabeticShortcut('v').
10262                        setShowAsAction(
10263                                MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10264            }
10265
10266            styledAttributes.recycle();
10267
10268            if (mCustomSelectionActionModeCallback != null) {
10269                if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) {
10270                    // The custom mode can choose to cancel the action mode
10271                    return false;
10272                }
10273            }
10274
10275            if (menu.hasVisibleItems() || mode.getCustomView() != null) {
10276                getSelectionController().show();
10277                return true;
10278            } else {
10279                return false;
10280            }
10281        }
10282
10283        @Override
10284        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
10285            if (mCustomSelectionActionModeCallback != null) {
10286                return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu);
10287            }
10288            return true;
10289        }
10290
10291        @Override
10292        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
10293            if (mCustomSelectionActionModeCallback != null &&
10294                 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) {
10295                return true;
10296            }
10297            return onTextContextMenuItem(item.getItemId());
10298        }
10299
10300        @Override
10301        public void onDestroyActionMode(ActionMode mode) {
10302            if (mCustomSelectionActionModeCallback != null) {
10303                mCustomSelectionActionModeCallback.onDestroyActionMode(mode);
10304            }
10305            Selection.setSelection((Spannable) mText, getSelectionEnd());
10306
10307            if (mSelectionModifierCursorController != null) {
10308                mSelectionModifierCursorController.hide();
10309            }
10310
10311            mSelectionActionMode = null;
10312        }
10313    }
10314
10315    private class ActionPopupWindow extends PinnedPopupWindow implements OnClickListener {
10316        private static final int POPUP_TEXT_LAYOUT =
10317                com.android.internal.R.layout.text_edit_action_popup_text;
10318        private TextView mPasteTextView;
10319        private TextView mReplaceTextView;
10320
10321        @Override
10322        protected void createPopupWindow() {
10323            mPopupWindow = new PopupWindow(TextView.this.mContext, null,
10324                    com.android.internal.R.attr.textSelectHandleWindowStyle);
10325            mPopupWindow.setClippingEnabled(true);
10326        }
10327
10328        @Override
10329        protected void initContentView() {
10330            LinearLayout linearLayout = new LinearLayout(TextView.this.getContext());
10331            linearLayout.setOrientation(LinearLayout.HORIZONTAL);
10332            mContentView = linearLayout;
10333            mContentView.setBackgroundResource(
10334                    com.android.internal.R.drawable.text_edit_paste_window);
10335
10336            LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
10337                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
10338
10339            LayoutParams wrapContent = new LayoutParams(
10340                    ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
10341
10342            mPasteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
10343            mPasteTextView.setLayoutParams(wrapContent);
10344            mContentView.addView(mPasteTextView);
10345            mPasteTextView.setText(com.android.internal.R.string.paste);
10346            mPasteTextView.setOnClickListener(this);
10347
10348            mReplaceTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
10349            mReplaceTextView.setLayoutParams(wrapContent);
10350            mContentView.addView(mReplaceTextView);
10351            mReplaceTextView.setText(com.android.internal.R.string.replace);
10352            mReplaceTextView.setOnClickListener(this);
10353        }
10354
10355        @Override
10356        public void show() {
10357            boolean canPaste = canPaste();
10358            boolean canSuggest = isSuggestionsEnabled() && isCursorInsideSuggestionSpan();
10359            mPasteTextView.setVisibility(canPaste ? View.VISIBLE : View.GONE);
10360            mReplaceTextView.setVisibility(canSuggest ? View.VISIBLE : View.GONE);
10361
10362            if (!canPaste && !canSuggest) return;
10363
10364            super.show();
10365        }
10366
10367        @Override
10368        public void onClick(View view) {
10369            if (view == mPasteTextView && canPaste()) {
10370                onTextContextMenuItem(ID_PASTE);
10371                hide();
10372            } else if (view == mReplaceTextView) {
10373                final int middle = (getSelectionStart() + getSelectionEnd()) / 2;
10374                stopSelectionActionMode();
10375                Selection.setSelection((Spannable) mText, middle);
10376                showSuggestions();
10377            }
10378        }
10379
10380        @Override
10381        protected int getTextOffset() {
10382            return (getSelectionStart() + getSelectionEnd()) / 2;
10383        }
10384
10385        @Override
10386        protected int getVerticalLocalPosition(int line) {
10387            return mLayout.getLineTop(line) - mContentView.getMeasuredHeight();
10388        }
10389
10390        @Override
10391        protected int clipVertically(int positionY) {
10392            if (positionY < 0) {
10393                final int offset = getTextOffset();
10394                final int line = mLayout.getLineForOffset(offset);
10395                positionY += mLayout.getLineBottom(line) - mLayout.getLineTop(line);
10396                positionY += mContentView.getMeasuredHeight();
10397
10398                // Assumes insertion and selection handles share the same height
10399                final Drawable handle = mContext.getResources().getDrawable(mTextSelectHandleRes);
10400                positionY += handle.getIntrinsicHeight();
10401            }
10402
10403            return positionY;
10404        }
10405    }
10406
10407    private abstract class HandleView extends View implements TextViewPositionListener {
10408        protected Drawable mDrawable;
10409        protected Drawable mDrawableLtr;
10410        protected Drawable mDrawableRtl;
10411        private final PopupWindow mContainer;
10412        // Position with respect to the parent TextView
10413        private int mPositionX, mPositionY;
10414        private boolean mIsDragging;
10415        // Offset from touch position to mPosition
10416        private float mTouchToWindowOffsetX, mTouchToWindowOffsetY;
10417        protected int mHotspotX;
10418        // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up
10419        private float mTouchOffsetY;
10420        // Where the touch position should be on the handle to ensure a maximum cursor visibility
10421        private float mIdealVerticalOffset;
10422        // Parent's (TextView) previous position in window
10423        private int mLastParentX, mLastParentY;
10424        // Transient action popup window for Paste and Replace actions
10425        protected ActionPopupWindow mActionPopupWindow;
10426        // Previous text character offset
10427        private int mPreviousOffset = -1;
10428        // Previous text character offset
10429        private boolean mPositionHasChanged = true;
10430        // Used to delay the appearance of the action popup window
10431        private Runnable mActionPopupShower;
10432
10433        public HandleView(Drawable drawableLtr, Drawable drawableRtl) {
10434            super(TextView.this.mContext);
10435            mContainer = new PopupWindow(TextView.this.mContext, null,
10436                    com.android.internal.R.attr.textSelectHandleWindowStyle);
10437            mContainer.setSplitTouchEnabled(true);
10438            mContainer.setClippingEnabled(false);
10439            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
10440            mContainer.setContentView(this);
10441
10442            mDrawableLtr = drawableLtr;
10443            mDrawableRtl = drawableRtl;
10444
10445            updateDrawable();
10446
10447            final int handleHeight = mDrawable.getIntrinsicHeight();
10448            mTouchOffsetY = -0.3f * handleHeight;
10449            mIdealVerticalOffset = 0.7f * handleHeight;
10450        }
10451
10452        protected void updateDrawable() {
10453            final int offset = getCurrentCursorOffset();
10454            final boolean isRtlCharAtOffset = mLayout.isRtlCharAt(offset);
10455            mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr;
10456            mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset);
10457        }
10458
10459        protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun);
10460
10461        // Touch-up filter: number of previous positions remembered
10462        private static final int HISTORY_SIZE = 5;
10463        private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150;
10464        private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350;
10465        private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE];
10466        private final int[] mPreviousOffsets = new int[HISTORY_SIZE];
10467        private int mPreviousOffsetIndex = 0;
10468        private int mNumberPreviousOffsets = 0;
10469
10470        private void startTouchUpFilter(int offset) {
10471            mNumberPreviousOffsets = 0;
10472            addPositionToTouchUpFilter(offset);
10473        }
10474
10475        private void addPositionToTouchUpFilter(int offset) {
10476            mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE;
10477            mPreviousOffsets[mPreviousOffsetIndex] = offset;
10478            mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis();
10479            mNumberPreviousOffsets++;
10480        }
10481
10482        private void filterOnTouchUp() {
10483            final long now = SystemClock.uptimeMillis();
10484            int i = 0;
10485            int index = mPreviousOffsetIndex;
10486            final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE);
10487            while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) {
10488                i++;
10489                index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE;
10490            }
10491
10492            if (i > 0 && i < iMax &&
10493                    (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) {
10494                positionAtCursorOffset(mPreviousOffsets[index], false);
10495            }
10496        }
10497
10498        public boolean offsetHasBeenChanged() {
10499            return mNumberPreviousOffsets > 1;
10500        }
10501
10502        @Override
10503        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
10504            setMeasuredDimension(mDrawable.getIntrinsicWidth(), mDrawable.getIntrinsicHeight());
10505        }
10506
10507        public void show() {
10508            if (isShowing()) return;
10509
10510            getPositionListener().addSubscriber(this, true /* local position may change */);
10511
10512            // Make sure the offset is always considered new, even when focusing at same position
10513            mPreviousOffset = -1;
10514            positionAtCursorOffset(getCurrentCursorOffset(), false);
10515
10516            hideActionPopupWindow();
10517        }
10518
10519        protected void dismiss() {
10520            mIsDragging = false;
10521            mContainer.dismiss();
10522            onDetached();
10523        }
10524
10525        public void hide() {
10526            dismiss();
10527
10528            TextView.this.getPositionListener().removeSubscriber(this);
10529        }
10530
10531        void showActionPopupWindow(int delay) {
10532            if (mActionPopupWindow == null) {
10533                mActionPopupWindow = new ActionPopupWindow();
10534            }
10535            if (mActionPopupShower == null) {
10536                mActionPopupShower = new Runnable() {
10537                    public void run() {
10538                        mActionPopupWindow.show();
10539                    }
10540                };
10541            } else {
10542                TextView.this.removeCallbacks(mActionPopupShower);
10543            }
10544            TextView.this.postDelayed(mActionPopupShower, delay);
10545        }
10546
10547        protected void hideActionPopupWindow() {
10548            if (mActionPopupShower != null) {
10549                TextView.this.removeCallbacks(mActionPopupShower);
10550            }
10551            if (mActionPopupWindow != null) {
10552                mActionPopupWindow.hide();
10553            }
10554        }
10555
10556        public boolean isShowing() {
10557            return mContainer.isShowing();
10558        }
10559
10560        private boolean isVisible() {
10561            // Always show a dragging handle.
10562            if (mIsDragging) {
10563                return true;
10564            }
10565
10566            if (isInBatchEditMode()) {
10567                return false;
10568            }
10569
10570            return TextView.this.isPositionVisible(mPositionX + mHotspotX, mPositionY);
10571        }
10572
10573        public abstract int getCurrentCursorOffset();
10574
10575        protected abstract void updateSelection(int offset);
10576
10577        public abstract void updatePosition(float x, float y);
10578
10579        protected void positionAtCursorOffset(int offset, boolean parentScrolled) {
10580            // A HandleView relies on the layout, which may be nulled by external methods
10581            if (mLayout == null) {
10582                // Will update controllers' state, hiding them and stopping selection mode if needed
10583                prepareCursorControllers();
10584                return;
10585            }
10586
10587            if (offset != mPreviousOffset || parentScrolled) {
10588                updateSelection(offset);
10589                addPositionToTouchUpFilter(offset);
10590                final int line = mLayout.getLineForOffset(offset);
10591
10592                mPositionX = (int) (mLayout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX);
10593                mPositionY = mLayout.getLineBottom(line);
10594
10595                // Take TextView's padding and scroll into account.
10596                mPositionX += viewportToContentHorizontalOffset();
10597                mPositionY += viewportToContentVerticalOffset();
10598
10599                mPreviousOffset = offset;
10600                mPositionHasChanged = true;
10601            }
10602        }
10603
10604        public void updatePosition(int parentPositionX, int parentPositionY,
10605                boolean parentPositionChanged, boolean parentScrolled) {
10606            positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled);
10607            if (parentPositionChanged || mPositionHasChanged) {
10608                if (mIsDragging) {
10609                    // Update touchToWindow offset in case of parent scrolling while dragging
10610                    if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) {
10611                        mTouchToWindowOffsetX += parentPositionX - mLastParentX;
10612                        mTouchToWindowOffsetY += parentPositionY - mLastParentY;
10613                        mLastParentX = parentPositionX;
10614                        mLastParentY = parentPositionY;
10615                    }
10616
10617                    onHandleMoved();
10618                }
10619
10620                if (isVisible()) {
10621                    final int positionX = parentPositionX + mPositionX;
10622                    final int positionY = parentPositionY + mPositionY;
10623                    if (isShowing()) {
10624                        mContainer.update(positionX, positionY, -1, -1);
10625                    } else {
10626                        mContainer.showAtLocation(TextView.this, Gravity.NO_GRAVITY,
10627                                positionX, positionY);
10628                    }
10629                } else {
10630                    if (isShowing()) {
10631                        dismiss();
10632                    }
10633                }
10634
10635                mPositionHasChanged = false;
10636            }
10637        }
10638
10639        @Override
10640        protected void onDraw(Canvas c) {
10641            mDrawable.setBounds(0, 0, mRight - mLeft, mBottom - mTop);
10642            mDrawable.draw(c);
10643        }
10644
10645        @Override
10646        public boolean onTouchEvent(MotionEvent ev) {
10647            switch (ev.getActionMasked()) {
10648                case MotionEvent.ACTION_DOWN: {
10649                    startTouchUpFilter(getCurrentCursorOffset());
10650                    mTouchToWindowOffsetX = ev.getRawX() - mPositionX;
10651                    mTouchToWindowOffsetY = ev.getRawY() - mPositionY;
10652
10653                    final PositionListener positionListener = getPositionListener();
10654                    mLastParentX = positionListener.getPositionX();
10655                    mLastParentY = positionListener.getPositionY();
10656                    mIsDragging = true;
10657                    break;
10658                }
10659
10660                case MotionEvent.ACTION_MOVE: {
10661                    final float rawX = ev.getRawX();
10662                    final float rawY = ev.getRawY();
10663
10664                    // Vertical hysteresis: vertical down movement tends to snap to ideal offset
10665                    final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY;
10666                    final float currentVerticalOffset = rawY - mPositionY - mLastParentY;
10667                    float newVerticalOffset;
10668                    if (previousVerticalOffset < mIdealVerticalOffset) {
10669                        newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset);
10670                        newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset);
10671                    } else {
10672                        newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset);
10673                        newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset);
10674                    }
10675                    mTouchToWindowOffsetY = newVerticalOffset + mLastParentY;
10676
10677                    final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX;
10678                    final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY;
10679
10680                    updatePosition(newPosX, newPosY);
10681                    break;
10682                }
10683
10684                case MotionEvent.ACTION_UP:
10685                    filterOnTouchUp();
10686                    mIsDragging = false;
10687                    break;
10688
10689                case MotionEvent.ACTION_CANCEL:
10690                    mIsDragging = false;
10691                    break;
10692            }
10693            return true;
10694        }
10695
10696        public boolean isDragging() {
10697            return mIsDragging;
10698        }
10699
10700        void onHandleMoved() {
10701            hideActionPopupWindow();
10702        }
10703
10704        public void onDetached() {
10705            hideActionPopupWindow();
10706        }
10707    }
10708
10709    private class InsertionHandleView extends HandleView {
10710        private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000;
10711        private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds
10712
10713        // Used to detect taps on the insertion handle, which will affect the ActionPopupWindow
10714        private float mDownPositionX, mDownPositionY;
10715        private Runnable mHider;
10716
10717        public InsertionHandleView(Drawable drawable) {
10718            super(drawable, drawable);
10719        }
10720
10721        @Override
10722        public void show() {
10723            super.show();
10724
10725            final long durationSinceCutOrCopy = SystemClock.uptimeMillis() - sLastCutOrCopyTime;
10726            if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) {
10727                showActionPopupWindow(0);
10728            }
10729
10730            hideAfterDelay();
10731        }
10732
10733        public void showWithActionPopup() {
10734            show();
10735            showActionPopupWindow(0);
10736        }
10737
10738        private void hideAfterDelay() {
10739            removeHiderCallback();
10740            if (mHider == null) {
10741                mHider = new Runnable() {
10742                    public void run() {
10743                        hide();
10744                    }
10745                };
10746            }
10747            TextView.this.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT);
10748        }
10749
10750        private void removeHiderCallback() {
10751            if (mHider != null) {
10752                TextView.this.removeCallbacks(mHider);
10753            }
10754        }
10755
10756        @Override
10757        protected int getHotspotX(Drawable drawable, boolean isRtlRun) {
10758            return drawable.getIntrinsicWidth() / 2;
10759        }
10760
10761        @Override
10762        public boolean onTouchEvent(MotionEvent ev) {
10763            final boolean result = super.onTouchEvent(ev);
10764
10765            switch (ev.getActionMasked()) {
10766                case MotionEvent.ACTION_DOWN:
10767                    mDownPositionX = ev.getRawX();
10768                    mDownPositionY = ev.getRawY();
10769                    break;
10770
10771                case MotionEvent.ACTION_UP:
10772                    if (!offsetHasBeenChanged()) {
10773                        final float deltaX = mDownPositionX - ev.getRawX();
10774                        final float deltaY = mDownPositionY - ev.getRawY();
10775                        final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
10776                        if (distanceSquared < mSquaredTouchSlopDistance) {
10777                            if (mActionPopupWindow != null && mActionPopupWindow.isShowing()) {
10778                                // Tapping on the handle dismisses the displayed action popup
10779                                mActionPopupWindow.hide();
10780                            } else {
10781                                showWithActionPopup();
10782                            }
10783                        }
10784                    }
10785                    hideAfterDelay();
10786                    break;
10787
10788                case MotionEvent.ACTION_CANCEL:
10789                    hideAfterDelay();
10790                    break;
10791
10792                default:
10793                    break;
10794            }
10795
10796            return result;
10797        }
10798
10799        @Override
10800        public int getCurrentCursorOffset() {
10801            return TextView.this.getSelectionStart();
10802        }
10803
10804        @Override
10805        public void updateSelection(int offset) {
10806            Selection.setSelection((Spannable) mText, offset);
10807        }
10808
10809        @Override
10810        public void updatePosition(float x, float y) {
10811            positionAtCursorOffset(getOffsetForPosition(x, y), false);
10812        }
10813
10814        @Override
10815        void onHandleMoved() {
10816            super.onHandleMoved();
10817            removeHiderCallback();
10818        }
10819
10820        @Override
10821        public void onDetached() {
10822            super.onDetached();
10823            removeHiderCallback();
10824        }
10825    }
10826
10827    private class SelectionStartHandleView extends HandleView {
10828
10829        public SelectionStartHandleView(Drawable drawableLtr, Drawable drawableRtl) {
10830            super(drawableLtr, drawableRtl);
10831        }
10832
10833        @Override
10834        protected int getHotspotX(Drawable drawable, boolean isRtlRun) {
10835            if (isRtlRun) {
10836                return drawable.getIntrinsicWidth() / 4;
10837            } else {
10838                return (drawable.getIntrinsicWidth() * 3) / 4;
10839            }
10840        }
10841
10842        @Override
10843        public int getCurrentCursorOffset() {
10844            return TextView.this.getSelectionStart();
10845        }
10846
10847        @Override
10848        public void updateSelection(int offset) {
10849            Selection.setSelection((Spannable) mText, offset, getSelectionEnd());
10850            updateDrawable();
10851        }
10852
10853        @Override
10854        public void updatePosition(float x, float y) {
10855            int offset = getOffsetForPosition(x, y);
10856
10857            // Handles can not cross and selection is at least one character
10858            final int selectionEnd = getSelectionEnd();
10859            if (offset >= selectionEnd) offset = Math.max(0, selectionEnd - 1);
10860
10861            positionAtCursorOffset(offset, false);
10862        }
10863
10864        public ActionPopupWindow getActionPopupWindow() {
10865            return mActionPopupWindow;
10866        }
10867    }
10868
10869    private class SelectionEndHandleView extends HandleView {
10870
10871        public SelectionEndHandleView(Drawable drawableLtr, Drawable drawableRtl) {
10872            super(drawableLtr, drawableRtl);
10873        }
10874
10875        @Override
10876        protected int getHotspotX(Drawable drawable, boolean isRtlRun) {
10877            if (isRtlRun) {
10878                return (drawable.getIntrinsicWidth() * 3) / 4;
10879            } else {
10880                return drawable.getIntrinsicWidth() / 4;
10881            }
10882        }
10883
10884        @Override
10885        public int getCurrentCursorOffset() {
10886            return TextView.this.getSelectionEnd();
10887        }
10888
10889        @Override
10890        public void updateSelection(int offset) {
10891            Selection.setSelection((Spannable) mText, getSelectionStart(), offset);
10892            updateDrawable();
10893        }
10894
10895        @Override
10896        public void updatePosition(float x, float y) {
10897            int offset = getOffsetForPosition(x, y);
10898
10899            // Handles can not cross and selection is at least one character
10900            final int selectionStart = getSelectionStart();
10901            if (offset <= selectionStart) offset = Math.min(selectionStart + 1, mText.length());
10902
10903            positionAtCursorOffset(offset, false);
10904        }
10905
10906        public void setActionPopupWindow(ActionPopupWindow actionPopupWindow) {
10907            mActionPopupWindow = actionPopupWindow;
10908        }
10909    }
10910
10911    /**
10912     * A CursorController instance can be used to control a cursor in the text.
10913     * It is not used outside of {@link TextView}.
10914     * @hide
10915     */
10916    private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener {
10917        /**
10918         * Makes the cursor controller visible on screen. Will be drawn by {@link #draw(Canvas)}.
10919         * See also {@link #hide()}.
10920         */
10921        public void show();
10922
10923        /**
10924         * Hide the cursor controller from screen.
10925         * See also {@link #show()}.
10926         */
10927        public void hide();
10928
10929        /**
10930         * Called when the view is detached from window. Perform house keeping task, such as
10931         * stopping Runnable thread that would otherwise keep a reference on the context, thus
10932         * preventing the activity from being recycled.
10933         */
10934        public void onDetached();
10935    }
10936
10937    private class InsertionPointCursorController implements CursorController {
10938        private InsertionHandleView mHandle;
10939
10940        public void show() {
10941            getHandle().show();
10942        }
10943
10944        public void showWithActionPopup() {
10945            getHandle().showWithActionPopup();
10946        }
10947
10948        public void hide() {
10949            if (mHandle != null) {
10950                mHandle.hide();
10951            }
10952        }
10953
10954        public void onTouchModeChanged(boolean isInTouchMode) {
10955            if (!isInTouchMode) {
10956                hide();
10957            }
10958        }
10959
10960        private InsertionHandleView getHandle() {
10961            if (mSelectHandleCenter == null) {
10962                mSelectHandleCenter = mContext.getResources().getDrawable(
10963                        mTextSelectHandleRes);
10964            }
10965            if (mHandle == null) {
10966                mHandle = new InsertionHandleView(mSelectHandleCenter);
10967            }
10968            return mHandle;
10969        }
10970
10971        @Override
10972        public void onDetached() {
10973            final ViewTreeObserver observer = getViewTreeObserver();
10974            observer.removeOnTouchModeChangeListener(this);
10975
10976            if (mHandle != null) mHandle.onDetached();
10977        }
10978    }
10979
10980    private class SelectionModifierCursorController implements CursorController {
10981        private static final int DELAY_BEFORE_REPLACE_ACTION = 200; // milliseconds
10982        // The cursor controller handles, lazily created when shown.
10983        private SelectionStartHandleView mStartHandle;
10984        private SelectionEndHandleView mEndHandle;
10985        // The offsets of that last touch down event. Remembered to start selection there.
10986        private int mMinTouchOffset, mMaxTouchOffset;
10987
10988        // Double tap detection
10989        private long mPreviousTapUpTime = 0;
10990        private float mPreviousTapPositionX, mPreviousTapPositionY;
10991
10992        SelectionModifierCursorController() {
10993            resetTouchOffsets();
10994        }
10995
10996        public void show() {
10997            if (isInBatchEditMode()) {
10998                return;
10999            }
11000            initDrawables();
11001            initHandles();
11002            hideInsertionPointCursorController();
11003        }
11004
11005        private void initDrawables() {
11006            if (mSelectHandleLeft == null) {
11007                mSelectHandleLeft = mContext.getResources().getDrawable(
11008                        mTextSelectHandleLeftRes);
11009            }
11010            if (mSelectHandleRight == null) {
11011                mSelectHandleRight = mContext.getResources().getDrawable(
11012                        mTextSelectHandleRightRes);
11013            }
11014        }
11015
11016        private void initHandles() {
11017            // Lazy object creation has to be done before updatePosition() is called.
11018            if (mStartHandle == null) {
11019                mStartHandle = new SelectionStartHandleView(mSelectHandleLeft, mSelectHandleRight);
11020            }
11021            if (mEndHandle == null) {
11022                mEndHandle = new SelectionEndHandleView(mSelectHandleRight, mSelectHandleLeft);
11023            }
11024
11025            mStartHandle.show();
11026            mEndHandle.show();
11027
11028            // Make sure both left and right handles share the same ActionPopupWindow (so that
11029            // moving any of the handles hides the action popup).
11030            mStartHandle.showActionPopupWindow(DELAY_BEFORE_REPLACE_ACTION);
11031            mEndHandle.setActionPopupWindow(mStartHandle.getActionPopupWindow());
11032
11033            hideInsertionPointCursorController();
11034        }
11035
11036        public void hide() {
11037            if (mStartHandle != null) mStartHandle.hide();
11038            if (mEndHandle != null) mEndHandle.hide();
11039        }
11040
11041        public void onTouchEvent(MotionEvent event) {
11042            // This is done even when the View does not have focus, so that long presses can start
11043            // selection and tap can move cursor from this tap position.
11044            switch (event.getActionMasked()) {
11045                case MotionEvent.ACTION_DOWN:
11046                    final float x = event.getX();
11047                    final float y = event.getY();
11048
11049                    // Remember finger down position, to be able to start selection from there
11050                    mMinTouchOffset = mMaxTouchOffset = getOffsetForPosition(x, y);
11051
11052                    // Double tap detection
11053                    long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime;
11054                    if (duration <= ViewConfiguration.getDoubleTapTimeout() &&
11055                            isPositionOnText(x, y)) {
11056                        final float deltaX = x - mPreviousTapPositionX;
11057                        final float deltaY = y - mPreviousTapPositionY;
11058                        final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
11059                        if (distanceSquared < mSquaredTouchSlopDistance) {
11060                            startSelectionActionMode();
11061                            mDiscardNextActionUp = true;
11062                        }
11063                    }
11064
11065                    mPreviousTapPositionX = x;
11066                    mPreviousTapPositionY = y;
11067                    break;
11068
11069                case MotionEvent.ACTION_POINTER_DOWN:
11070                case MotionEvent.ACTION_POINTER_UP:
11071                    // Handle multi-point gestures. Keep min and max offset positions.
11072                    // Only activated for devices that correctly handle multi-touch.
11073                    if (mContext.getPackageManager().hasSystemFeature(
11074                            PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) {
11075                        updateMinAndMaxOffsets(event);
11076                    }
11077                    break;
11078
11079                case MotionEvent.ACTION_UP:
11080                    mPreviousTapUpTime = SystemClock.uptimeMillis();
11081                    break;
11082            }
11083        }
11084
11085        /**
11086         * @param event
11087         */
11088        private void updateMinAndMaxOffsets(MotionEvent event) {
11089            int pointerCount = event.getPointerCount();
11090            for (int index = 0; index < pointerCount; index++) {
11091                int offset = getOffsetForPosition(event.getX(index), event.getY(index));
11092                if (offset < mMinTouchOffset) mMinTouchOffset = offset;
11093                if (offset > mMaxTouchOffset) mMaxTouchOffset = offset;
11094            }
11095        }
11096
11097        public int getMinTouchOffset() {
11098            return mMinTouchOffset;
11099        }
11100
11101        public int getMaxTouchOffset() {
11102            return mMaxTouchOffset;
11103        }
11104
11105        public void resetTouchOffsets() {
11106            mMinTouchOffset = mMaxTouchOffset = -1;
11107        }
11108
11109        /**
11110         * @return true iff this controller is currently used to move the selection start.
11111         */
11112        public boolean isSelectionStartDragged() {
11113            return mStartHandle != null && mStartHandle.isDragging();
11114        }
11115
11116        public void onTouchModeChanged(boolean isInTouchMode) {
11117            if (!isInTouchMode) {
11118                hide();
11119            }
11120        }
11121
11122        @Override
11123        public void onDetached() {
11124            final ViewTreeObserver observer = getViewTreeObserver();
11125            observer.removeOnTouchModeChangeListener(this);
11126
11127            if (mStartHandle != null) mStartHandle.onDetached();
11128            if (mEndHandle != null) mEndHandle.onDetached();
11129        }
11130    }
11131
11132    private void hideInsertionPointCursorController() {
11133        // No need to create the controller to hide it.
11134        if (mInsertionPointCursorController != null) {
11135            mInsertionPointCursorController.hide();
11136        }
11137    }
11138
11139    /**
11140     * Hides the insertion controller and stops text selection mode, hiding the selection controller
11141     */
11142    private void hideControllers() {
11143        hideCursorControllers();
11144        hideSpanControllers();
11145    }
11146
11147    private void hideSpanControllers() {
11148        if (mChangeWatcher != null) {
11149            mChangeWatcher.hideControllers();
11150        }
11151    }
11152
11153    private void hideCursorControllers() {
11154        if (mSuggestionsPopupWindow != null && !mSuggestionsPopupWindow.isShowingUp()) {
11155            // Should be done before hide insertion point controller since it triggers a show of it
11156            mSuggestionsPopupWindow.hide();
11157        }
11158        hideInsertionPointCursorController();
11159        stopSelectionActionMode();
11160    }
11161
11162    /**
11163     * Get the character offset closest to the specified absolute position. A typical use case is to
11164     * pass the result of {@link MotionEvent#getX()} and {@link MotionEvent#getY()} to this method.
11165     *
11166     * @param x The horizontal absolute position of a point on screen
11167     * @param y The vertical absolute position of a point on screen
11168     * @return the character offset for the character whose position is closest to the specified
11169     *  position. Returns -1 if there is no layout.
11170     */
11171    public int getOffsetForPosition(float x, float y) {
11172        if (getLayout() == null) return -1;
11173        final int line = getLineAtCoordinate(y);
11174        final int offset = getOffsetAtCoordinate(line, x);
11175        return offset;
11176    }
11177
11178    private float convertToLocalHorizontalCoordinate(float x) {
11179        x -= getTotalPaddingLeft();
11180        // Clamp the position to inside of the view.
11181        x = Math.max(0.0f, x);
11182        x = Math.min(getWidth() - getTotalPaddingRight() - 1, x);
11183        x += getScrollX();
11184        return x;
11185    }
11186
11187    private int getLineAtCoordinate(float y) {
11188        y -= getTotalPaddingTop();
11189        // Clamp the position to inside of the view.
11190        y = Math.max(0.0f, y);
11191        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
11192        y += getScrollY();
11193        return getLayout().getLineForVertical((int) y);
11194    }
11195
11196    private int getOffsetAtCoordinate(int line, float x) {
11197        x = convertToLocalHorizontalCoordinate(x);
11198        return getLayout().getOffsetForHorizontal(line, x);
11199    }
11200
11201    /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed
11202     * in the view. Returns false when the position is in the empty space of left/right of text.
11203     */
11204    private boolean isPositionOnText(float x, float y) {
11205        if (getLayout() == null) return false;
11206
11207        final int line = getLineAtCoordinate(y);
11208        x = convertToLocalHorizontalCoordinate(x);
11209
11210        if (x < getLayout().getLineLeft(line)) return false;
11211        if (x > getLayout().getLineRight(line)) return false;
11212        return true;
11213    }
11214
11215    @Override
11216    public boolean onDragEvent(DragEvent event) {
11217        switch (event.getAction()) {
11218            case DragEvent.ACTION_DRAG_STARTED:
11219                return hasInsertionController();
11220
11221            case DragEvent.ACTION_DRAG_ENTERED:
11222                TextView.this.requestFocus();
11223                return true;
11224
11225            case DragEvent.ACTION_DRAG_LOCATION:
11226                final int offset = getOffsetForPosition(event.getX(), event.getY());
11227                Selection.setSelection((Spannable)mText, offset);
11228                return true;
11229
11230            case DragEvent.ACTION_DROP:
11231                onDrop(event);
11232                return true;
11233
11234            case DragEvent.ACTION_DRAG_ENDED:
11235            case DragEvent.ACTION_DRAG_EXITED:
11236            default:
11237                return true;
11238        }
11239    }
11240
11241    private void onDrop(DragEvent event) {
11242        StringBuilder content = new StringBuilder("");
11243        ClipData clipData = event.getClipData();
11244        final int itemCount = clipData.getItemCount();
11245        for (int i=0; i < itemCount; i++) {
11246            Item item = clipData.getItemAt(i);
11247            content.append(item.coerceToText(TextView.this.mContext));
11248        }
11249
11250        final int offset = getOffsetForPosition(event.getX(), event.getY());
11251
11252        Object localState = event.getLocalState();
11253        DragLocalState dragLocalState = null;
11254        if (localState instanceof DragLocalState) {
11255            dragLocalState = (DragLocalState) localState;
11256        }
11257        boolean dragDropIntoItself = dragLocalState != null &&
11258                dragLocalState.sourceTextView == this;
11259
11260        if (dragDropIntoItself) {
11261            if (offset >= dragLocalState.start && offset < dragLocalState.end) {
11262                // A drop inside the original selection discards the drop.
11263                return;
11264            }
11265        }
11266
11267        final int originalLength = mText.length();
11268        long minMax = prepareSpacesAroundPaste(offset, offset, content);
11269        int min = extractRangeStartFromLong(minMax);
11270        int max = extractRangeEndFromLong(minMax);
11271
11272        Selection.setSelection((Spannable) mText, max);
11273        replaceText_internal(min, max, content);
11274
11275        if (dragDropIntoItself) {
11276            int dragSourceStart = dragLocalState.start;
11277            int dragSourceEnd = dragLocalState.end;
11278            if (max <= dragSourceStart) {
11279                // Inserting text before selection has shifted positions
11280                final int shift = mText.length() - originalLength;
11281                dragSourceStart += shift;
11282                dragSourceEnd += shift;
11283            }
11284
11285            // Delete original selection
11286            deleteText_internal(dragSourceStart, dragSourceEnd);
11287
11288            // Make sure we do not leave two adjacent spaces.
11289            if ((dragSourceStart == 0 ||
11290                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart - 1))) &&
11291                    (dragSourceStart == mText.length() ||
11292                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart)))) {
11293                final int pos = dragSourceStart == mText.length() ?
11294                        dragSourceStart - 1 : dragSourceStart;
11295                deleteText_internal(pos, pos + 1);
11296            }
11297        }
11298    }
11299
11300    /**
11301     * @return True if this view supports insertion handles.
11302     */
11303    boolean hasInsertionController() {
11304        return mInsertionControllerEnabled;
11305    }
11306
11307    /**
11308     * @return True if this view supports selection handles.
11309     */
11310    boolean hasSelectionController() {
11311        return mSelectionControllerEnabled;
11312    }
11313
11314    InsertionPointCursorController getInsertionController() {
11315        if (!mInsertionControllerEnabled) {
11316            return null;
11317        }
11318
11319        if (mInsertionPointCursorController == null) {
11320            mInsertionPointCursorController = new InsertionPointCursorController();
11321
11322            final ViewTreeObserver observer = getViewTreeObserver();
11323            observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
11324        }
11325
11326        return mInsertionPointCursorController;
11327    }
11328
11329    SelectionModifierCursorController getSelectionController() {
11330        if (!mSelectionControllerEnabled) {
11331            return null;
11332        }
11333
11334        if (mSelectionModifierCursorController == null) {
11335            mSelectionModifierCursorController = new SelectionModifierCursorController();
11336
11337            final ViewTreeObserver observer = getViewTreeObserver();
11338            observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
11339        }
11340
11341        return mSelectionModifierCursorController;
11342    }
11343
11344    boolean isInBatchEditMode() {
11345        final InputMethodState ims = mInputMethodState;
11346        if (ims != null) {
11347            return ims.mBatchEditNesting > 0;
11348        }
11349        return mInBatchEditControllers;
11350    }
11351
11352    @Override
11353    protected void resolveTextDirection() {
11354        if (hasPasswordTransformationMethod()) {
11355            mTextDir = TextDirectionHeuristics.LOCALE;
11356            return;
11357        }
11358
11359        // Always need to resolve layout direction first
11360        final boolean defaultIsRtl = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL);
11361
11362        // Then resolve text direction on the parent
11363        super.resolveTextDirection();
11364
11365        // Now, we can select the heuristic
11366        int textDir = getResolvedTextDirection();
11367        switch (textDir) {
11368            default:
11369            case TEXT_DIRECTION_FIRST_STRONG:
11370                mTextDir = (defaultIsRtl ? TextDirectionHeuristics.FIRSTSTRONG_RTL :
11371                        TextDirectionHeuristics.FIRSTSTRONG_LTR);
11372                break;
11373            case TEXT_DIRECTION_ANY_RTL:
11374                mTextDir = TextDirectionHeuristics.ANYRTL_LTR;
11375                break;
11376            case TEXT_DIRECTION_LTR:
11377                mTextDir = TextDirectionHeuristics.LTR;
11378                break;
11379            case TEXT_DIRECTION_RTL:
11380                mTextDir = TextDirectionHeuristics.RTL;
11381                break;
11382        }
11383    }
11384
11385    /**
11386     * Subclasses will need to override this method to implement their own way of resolving
11387     * drawables depending on the layout direction.
11388     *
11389     * A call to the super method will be required from the subclasses implementation.
11390     *
11391     */
11392    protected void resolveDrawables() {
11393        // No need to resolve twice
11394        if (mResolvedDrawables) {
11395            return;
11396        }
11397        // No drawable to resolve
11398        if (mDrawables == null) {
11399            return;
11400        }
11401        // No relative drawable to resolve
11402        if (mDrawables.mDrawableStart == null && mDrawables.mDrawableEnd == null) {
11403            mResolvedDrawables = true;
11404            return;
11405        }
11406
11407        Drawables dr = mDrawables;
11408        switch(getResolvedLayoutDirection()) {
11409            case LAYOUT_DIRECTION_RTL:
11410                if (dr.mDrawableStart != null) {
11411                    dr.mDrawableRight = dr.mDrawableStart;
11412
11413                    dr.mDrawableSizeRight = dr.mDrawableSizeStart;
11414                    dr.mDrawableHeightRight = dr.mDrawableHeightStart;
11415                }
11416                if (dr.mDrawableEnd != null) {
11417                    dr.mDrawableLeft = dr.mDrawableEnd;
11418
11419                    dr.mDrawableSizeLeft = dr.mDrawableSizeEnd;
11420                    dr.mDrawableHeightLeft = dr.mDrawableHeightEnd;
11421                }
11422                break;
11423
11424            case LAYOUT_DIRECTION_LTR:
11425            default:
11426                if (dr.mDrawableStart != null) {
11427                    dr.mDrawableLeft = dr.mDrawableStart;
11428
11429                    dr.mDrawableSizeLeft = dr.mDrawableSizeStart;
11430                    dr.mDrawableHeightLeft = dr.mDrawableHeightStart;
11431                }
11432                if (dr.mDrawableEnd != null) {
11433                    dr.mDrawableRight = dr.mDrawableEnd;
11434
11435                    dr.mDrawableSizeRight = dr.mDrawableSizeEnd;
11436                    dr.mDrawableHeightRight = dr.mDrawableHeightEnd;
11437                }
11438                break;
11439        }
11440        mResolvedDrawables = true;
11441    }
11442
11443    protected void resetResolvedDrawables() {
11444        mResolvedDrawables = false;
11445    }
11446
11447    /**
11448     * @hide
11449     */
11450    protected void viewClicked(InputMethodManager imm) {
11451        if (imm != null) {
11452            imm.viewClicked(this);
11453        }
11454    }
11455
11456    /**
11457     * Deletes the range of text [start, end[.
11458     * @hide
11459     */
11460    protected void deleteText_internal(int start, int end) {
11461        ((Editable) mText).delete(start, end);
11462    }
11463
11464    /**
11465     * Replaces the range of text [start, end[ by replacement text
11466     * @hide
11467     */
11468    protected void replaceText_internal(int start, int end, CharSequence text) {
11469        ((Editable) mText).replace(start, end, text);
11470    }
11471
11472    /**
11473     * Sets a span on the specified range of text
11474     * @hide
11475     */
11476    protected void setSpan_internal(Object span, int start, int end, int flags) {
11477        ((Editable) mText).setSpan(span, start, end, flags);
11478    }
11479
11480    /**
11481     * Moves the cursor to the specified offset position in text
11482     * @hide
11483     */
11484    protected void setCursorPosition_internal(int start, int end) {
11485        Selection.setSelection(((Editable) mText), start, end);
11486    }
11487
11488    @ViewDebug.ExportedProperty(category = "text")
11489    private CharSequence            mText;
11490    private CharSequence            mTransformed;
11491    private BufferType              mBufferType = BufferType.NORMAL;
11492
11493    private int                     mInputType = EditorInfo.TYPE_NULL;
11494    private CharSequence            mHint;
11495    private Layout                  mHintLayout;
11496
11497    private KeyListener             mInput;
11498
11499    private MovementMethod          mMovement;
11500    private TransformationMethod    mTransformation;
11501    private boolean                 mAllowTransformationLengthChange;
11502    private ChangeWatcher           mChangeWatcher;
11503
11504    private ArrayList<TextWatcher>  mListeners = null;
11505
11506    // display attributes
11507    private final TextPaint         mTextPaint;
11508    private boolean                 mUserSetTextScaleX;
11509    private final Paint             mHighlightPaint;
11510    private int                     mHighlightColor = 0x6633B5E5;
11511    private Layout                  mLayout;
11512
11513    private long                    mShowCursor;
11514    private Blink                   mBlink;
11515    private boolean                 mCursorVisible = true;
11516
11517    // Cursor Controllers.
11518    private InsertionPointCursorController mInsertionPointCursorController;
11519    private SelectionModifierCursorController mSelectionModifierCursorController;
11520    private ActionMode              mSelectionActionMode;
11521    private boolean                 mInsertionControllerEnabled;
11522    private boolean                 mSelectionControllerEnabled;
11523    private boolean                 mInBatchEditControllers;
11524
11525    private boolean                 mSelectAllOnFocus = false;
11526
11527    private int                     mGravity = Gravity.TOP | Gravity.START;
11528    private boolean                 mHorizontallyScrolling;
11529
11530    private int                     mAutoLinkMask;
11531    private boolean                 mLinksClickable = true;
11532
11533    private float                   mSpacingMult = 1.0f;
11534    private float                   mSpacingAdd = 0.0f;
11535    private boolean                 mTextIsSelectable = false;
11536
11537    private static final int        LINES = 1;
11538    private static final int        EMS = LINES;
11539    private static final int        PIXELS = 2;
11540
11541    private int                     mMaximum = Integer.MAX_VALUE;
11542    private int                     mMaxMode = LINES;
11543    private int                     mMinimum = 0;
11544    private int                     mMinMode = LINES;
11545
11546    private int                     mOldMaximum = mMaximum;
11547    private int                     mOldMaxMode = mMaxMode;
11548
11549    private int                     mMaxWidth = Integer.MAX_VALUE;
11550    private int                     mMaxWidthMode = PIXELS;
11551    private int                     mMinWidth = 0;
11552    private int                     mMinWidthMode = PIXELS;
11553
11554    private boolean                 mSingleLine;
11555    private int                     mDesiredHeightAtMeasure = -1;
11556    private boolean                 mIncludePad = true;
11557
11558    // tmp primitives, so we don't alloc them on each draw
11559    private Path                    mHighlightPath;
11560    private boolean                 mHighlightPathBogus = true;
11561    private static final RectF      sTempRect = new RectF();
11562    private static final float[]    sTmpPosition = new float[2];
11563
11564    // XXX should be much larger
11565    private static final int        VERY_WIDE = 1024*1024;
11566
11567    private static final int        BLINK = 500;
11568
11569    private static final int ANIMATED_SCROLL_GAP = 250;
11570    private long mLastScroll;
11571    private Scroller mScroller = null;
11572
11573    private BoringLayout.Metrics mBoring;
11574    private BoringLayout.Metrics mHintBoring;
11575
11576    private BoringLayout mSavedLayout, mSavedHintLayout;
11577
11578    private TextDirectionHeuristic mTextDir = null;
11579
11580    private static final InputFilter[] NO_FILTERS = new InputFilter[0];
11581    private InputFilter[] mFilters = NO_FILTERS;
11582    private static final Spanned EMPTY_SPANNED = new SpannedString("");
11583    private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20;
11584    // System wide time for last cut or copy action.
11585    private static long sLastCutOrCopyTime;
11586    // Used to highlight a word when it is corrected by the IME
11587    private CorrectionHighlighter mCorrectionHighlighter;
11588    // New state used to change background based on whether this TextView is multiline.
11589    private static final int[] MULTILINE_STATE_SET = { R.attr.state_multiline };
11590}
11591