TextView.java revision d2b58940f7db9d85a9d3f9d12173ec2a07c837df 
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.Resources;
28import android.content.res.TypedArray;
29import android.content.res.XmlResourceParser;
30import android.graphics.Canvas;
31import android.graphics.Color;
32import android.graphics.Paint;
33import android.graphics.Path;
34import android.graphics.Rect;
35import android.graphics.RectF;
36import android.graphics.Typeface;
37import android.graphics.drawable.Drawable;
38import android.inputmethodservice.ExtractEditText;
39import android.net.Uri;
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.ContextMenu;
105import android.view.DragEvent;
106import android.view.Gravity;
107import android.view.HapticFeedbackConstants;
108import android.view.KeyCharacterMap;
109import android.view.KeyEvent;
110import android.view.LayoutInflater;
111import android.view.Menu;
112import android.view.MenuItem;
113import android.view.MotionEvent;
114import android.view.View;
115import android.view.ViewConfiguration;
116import android.view.ViewDebug;
117import android.view.ViewGroup;
118import android.view.ViewGroup.LayoutParams;
119import android.view.ViewParent;
120import android.view.ViewRootImpl;
121import android.view.ViewTreeObserver;
122import android.view.WindowManager;
123import android.view.accessibility.AccessibilityEvent;
124import android.view.accessibility.AccessibilityManager;
125import android.view.accessibility.AccessibilityNodeInfo;
126import android.view.animation.AnimationUtils;
127import android.view.inputmethod.BaseInputConnection;
128import android.view.inputmethod.CompletionInfo;
129import android.view.inputmethod.CorrectionInfo;
130import android.view.inputmethod.EditorInfo;
131import android.view.inputmethod.ExtractedText;
132import android.view.inputmethod.ExtractedTextRequest;
133import android.view.inputmethod.InputConnection;
134import android.view.inputmethod.InputMethodManager;
135import android.widget.AdapterView.OnItemClickListener;
136import android.widget.RemoteViews.RemoteView;
137
138import com.android.internal.util.FastMath;
139import com.android.internal.widget.EditableInputConnection;
140
141import org.xmlpull.v1.XmlPullParserException;
142
143import java.io.IOException;
144import java.lang.ref.WeakReference;
145import java.text.BreakIterator;
146import java.util.ArrayList;
147import java.util.Arrays;
148import java.util.Comparator;
149import java.util.HashMap;
150
151/**
152 * Displays text to the user and optionally allows them to edit it.  A TextView
153 * is a complete text editor, however the basic class is configured to not
154 * allow editing; see {@link EditText} for a subclass that configures the text
155 * view for editing.
156 *
157 * <p>
158 * <b>XML attributes</b>
159 * <p>
160 * See {@link android.R.styleable#TextView TextView Attributes},
161 * {@link android.R.styleable#View View Attributes}
162 *
163 * @attr ref android.R.styleable#TextView_text
164 * @attr ref android.R.styleable#TextView_bufferType
165 * @attr ref android.R.styleable#TextView_hint
166 * @attr ref android.R.styleable#TextView_textColor
167 * @attr ref android.R.styleable#TextView_textColorHighlight
168 * @attr ref android.R.styleable#TextView_textColorHint
169 * @attr ref android.R.styleable#TextView_textAppearance
170 * @attr ref android.R.styleable#TextView_textColorLink
171 * @attr ref android.R.styleable#TextView_textSize
172 * @attr ref android.R.styleable#TextView_textScaleX
173 * @attr ref android.R.styleable#TextView_typeface
174 * @attr ref android.R.styleable#TextView_textStyle
175 * @attr ref android.R.styleable#TextView_cursorVisible
176 * @attr ref android.R.styleable#TextView_maxLines
177 * @attr ref android.R.styleable#TextView_maxHeight
178 * @attr ref android.R.styleable#TextView_lines
179 * @attr ref android.R.styleable#TextView_height
180 * @attr ref android.R.styleable#TextView_minLines
181 * @attr ref android.R.styleable#TextView_minHeight
182 * @attr ref android.R.styleable#TextView_maxEms
183 * @attr ref android.R.styleable#TextView_maxWidth
184 * @attr ref android.R.styleable#TextView_ems
185 * @attr ref android.R.styleable#TextView_width
186 * @attr ref android.R.styleable#TextView_minEms
187 * @attr ref android.R.styleable#TextView_minWidth
188 * @attr ref android.R.styleable#TextView_gravity
189 * @attr ref android.R.styleable#TextView_scrollHorizontally
190 * @attr ref android.R.styleable#TextView_password
191 * @attr ref android.R.styleable#TextView_singleLine
192 * @attr ref android.R.styleable#TextView_selectAllOnFocus
193 * @attr ref android.R.styleable#TextView_includeFontPadding
194 * @attr ref android.R.styleable#TextView_maxLength
195 * @attr ref android.R.styleable#TextView_shadowColor
196 * @attr ref android.R.styleable#TextView_shadowDx
197 * @attr ref android.R.styleable#TextView_shadowDy
198 * @attr ref android.R.styleable#TextView_shadowRadius
199 * @attr ref android.R.styleable#TextView_autoLink
200 * @attr ref android.R.styleable#TextView_linksClickable
201 * @attr ref android.R.styleable#TextView_numeric
202 * @attr ref android.R.styleable#TextView_digits
203 * @attr ref android.R.styleable#TextView_phoneNumber
204 * @attr ref android.R.styleable#TextView_inputMethod
205 * @attr ref android.R.styleable#TextView_capitalize
206 * @attr ref android.R.styleable#TextView_autoText
207 * @attr ref android.R.styleable#TextView_editable
208 * @attr ref android.R.styleable#TextView_freezesText
209 * @attr ref android.R.styleable#TextView_ellipsize
210 * @attr ref android.R.styleable#TextView_drawableTop
211 * @attr ref android.R.styleable#TextView_drawableBottom
212 * @attr ref android.R.styleable#TextView_drawableRight
213 * @attr ref android.R.styleable#TextView_drawableLeft
214 * @attr ref android.R.styleable#TextView_drawablePadding
215 * @attr ref android.R.styleable#TextView_lineSpacingExtra
216 * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
217 * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
218 * @attr ref android.R.styleable#TextView_inputType
219 * @attr ref android.R.styleable#TextView_imeOptions
220 * @attr ref android.R.styleable#TextView_privateImeOptions
221 * @attr ref android.R.styleable#TextView_imeActionLabel
222 * @attr ref android.R.styleable#TextView_imeActionId
223 * @attr ref android.R.styleable#TextView_editorExtras
224 */
225@RemoteView
226public class TextView extends View implements ViewTreeObserver.OnPreDrawListener {
227    static final String LOG_TAG = "TextView";
228    static final boolean DEBUG_EXTRACT = false;
229
230    private static final int PRIORITY = 100;
231    private int mCurrentAlpha = 255;
232
233    final int[] mTempCoords = new int[2];
234    Rect mTempRect;
235
236    private ColorStateList mTextColor;
237    private int mCurTextColor;
238    private ColorStateList mHintTextColor;
239    private ColorStateList mLinkTextColor;
240    private int mCurHintTextColor;
241    private boolean mFreezesText;
242    private boolean mFrozenWithFocus;
243    private boolean mTemporaryDetach;
244    private boolean mDispatchTemporaryDetach;
245
246    private boolean mDiscardNextActionUp = false;
247    private boolean mIgnoreActionUpEvent = false;
248
249    private Editable.Factory mEditableFactory = Editable.Factory.getInstance();
250    private Spannable.Factory mSpannableFactory = Spannable.Factory.getInstance();
251
252    private float mShadowRadius, mShadowDx, mShadowDy;
253
254    private static final int PREDRAW_NOT_REGISTERED = 0;
255    private static final int PREDRAW_PENDING = 1;
256    private static final int PREDRAW_DONE = 2;
257    private int mPreDrawState = PREDRAW_NOT_REGISTERED;
258
259    private TextUtils.TruncateAt mEllipsize = null;
260
261    // Enum for the "typeface" XML parameter.
262    // TODO: How can we get this from the XML instead of hardcoding it here?
263    private static final int SANS = 1;
264    private static final int SERIF = 2;
265    private static final int MONOSPACE = 3;
266
267    // Bitfield for the "numeric" XML parameter.
268    // TODO: How can we get this from the XML instead of hardcoding it here?
269    private static final int SIGNED = 2;
270    private static final int DECIMAL = 4;
271
272    class Drawables {
273        final Rect mCompoundRect = new Rect();
274        Drawable mDrawableTop, mDrawableBottom, mDrawableLeft, mDrawableRight,
275                mDrawableStart, mDrawableEnd;
276        int mDrawableSizeTop, mDrawableSizeBottom, mDrawableSizeLeft, mDrawableSizeRight,
277                mDrawableSizeStart, mDrawableSizeEnd;
278        int mDrawableWidthTop, mDrawableWidthBottom, mDrawableHeightLeft, mDrawableHeightRight,
279                mDrawableHeightStart, mDrawableHeightEnd;
280        int mDrawablePadding;
281    }
282    private Drawables mDrawables;
283
284    private CharSequence mError;
285    private boolean mErrorWasChanged;
286    private ErrorPopup mPopup;
287    /**
288     * This flag is set if the TextView tries to display an error before it
289     * is attached to the window (so its position is still unknown).
290     * It causes the error to be shown later, when onAttachedToWindow()
291     * is called.
292     */
293    private boolean mShowErrorAfterAttach;
294
295    private CharWrapper mCharWrapper = null;
296
297    private boolean mSelectionMoved = false;
298    private boolean mTouchFocusSelected = false;
299
300    private Marquee mMarquee;
301    private boolean mRestartMarquee;
302
303    private int mMarqueeRepeatLimit = 3;
304
305    class InputContentType {
306        int imeOptions = EditorInfo.IME_NULL;
307        String privateImeOptions;
308        CharSequence imeActionLabel;
309        int imeActionId;
310        Bundle extras;
311        OnEditorActionListener onEditorActionListener;
312        boolean enterDown;
313    }
314    InputContentType mInputContentType;
315
316    class InputMethodState {
317        Rect mCursorRectInWindow = new Rect();
318        RectF mTmpRectF = new RectF();
319        float[] mTmpOffset = new float[2];
320        ExtractedTextRequest mExtracting;
321        final ExtractedText mTmpExtracted = new ExtractedText();
322        int mBatchEditNesting;
323        boolean mCursorChanged;
324        boolean mSelectionModeChanged;
325        boolean mContentChanged;
326        int mChangedStart, mChangedEnd, mChangedDelta;
327    }
328    InputMethodState mInputMethodState;
329
330    private int mTextSelectHandleLeftRes;
331    private int mTextSelectHandleRightRes;
332    private int mTextSelectHandleRes;
333
334    private int mTextEditSuggestionItemLayout;
335    private SuggestionsPopupWindow mSuggestionsPopupWindow;
336    private SuggestionRangeSpan mSuggestionRangeSpan;
337
338    private int mCursorDrawableRes;
339    private final Drawable[] mCursorDrawable = new Drawable[2];
340    private int mCursorCount; // Actual current number of used mCursorDrawable: 0, 1 or 2
341
342    private Drawable mSelectHandleLeft;
343    private Drawable mSelectHandleRight;
344    private Drawable mSelectHandleCenter;
345
346    // Global listener that detects changes in the global position of the TextView
347    private PositionListener mPositionListener;
348
349    private float mLastDownPositionX, mLastDownPositionY;
350    private Callback mCustomSelectionActionModeCallback;
351
352    private final int mSquaredTouchSlopDistance;
353    // Set when this TextView gained focus with some text selected. Will start selection mode.
354    private boolean mCreatedWithASelection = false;
355
356    // Size of the window for the word iterator, should be greater than the longest word's length
357    private static final int WORD_ITERATOR_WINDOW_WIDTH = 50;
358    private WordIterator mWordIterator;
359
360    private SpellChecker mSpellChecker;
361
362    // The alignment to pass to Layout, or null if not resolved.
363    private Layout.Alignment mLayoutAlignment;
364
365    // The default value for mTextAlign.
366    private TextAlign mTextAlign = TextAlign.INHERIT;
367
368    private static enum TextAlign {
369        INHERIT, GRAVITY, TEXT_START, TEXT_END, CENTER, VIEW_START, VIEW_END;
370    }
371
372    private boolean mResolvedDrawables = false;
373
374    /**
375     * On some devices the fading edges add a performance penalty if used
376     * extensively in the same layout. This mode indicates how the marquee
377     * is currently being shown, if applicable. (mEllipsize will == MARQUEE)
378     */
379    private int mMarqueeFadeMode = MARQUEE_FADE_NORMAL;
380
381    /**
382     * When mMarqueeFadeMode is not MARQUEE_FADE_NORMAL, this stores
383     * the layout that should be used when the mode switches.
384     */
385    private Layout mSavedMarqueeModeLayout;
386
387    /**
388     * Draw marquee text with fading edges as usual
389     */
390    private static final int MARQUEE_FADE_NORMAL = 0;
391
392    /**
393     * Draw marquee text as ellipsize end while inactive instead of with the fade.
394     * (Useful for devices where the fade can be expensive if overdone)
395     */
396    private static final int MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS = 1;
397
398    /**
399     * Draw marquee text with fading edges because it is currently active/animating.
400     */
401    private static final int MARQUEE_FADE_SWITCH_SHOW_FADE = 2;
402
403    /*
404     * Kick-start the font cache for the zygote process (to pay the cost of
405     * initializing freetype for our default font only once).
406     */
407    static {
408        Paint p = new Paint();
409        p.setAntiAlias(true);
410        // We don't care about the result, just the side-effect of measuring.
411        p.measureText("H");
412    }
413
414    /**
415     * Interface definition for a callback to be invoked when an action is
416     * performed on the editor.
417     */
418    public interface OnEditorActionListener {
419        /**
420         * Called when an action is being performed.
421         *
422         * @param v The view that was clicked.
423         * @param actionId Identifier of the action.  This will be either the
424         * identifier you supplied, or {@link EditorInfo#IME_NULL
425         * EditorInfo.IME_NULL} if being called due to the enter key
426         * being pressed.
427         * @param event If triggered by an enter key, this is the event;
428         * otherwise, this is null.
429         * @return Return true if you have consumed the action, else false.
430         */
431        boolean onEditorAction(TextView v, int actionId, KeyEvent event);
432    }
433
434    public TextView(Context context) {
435        this(context, null);
436    }
437
438    public TextView(Context context,
439                    AttributeSet attrs) {
440        this(context, attrs, com.android.internal.R.attr.textViewStyle);
441    }
442
443    @SuppressWarnings("deprecation")
444    public TextView(Context context,
445                    AttributeSet attrs,
446                    int defStyle) {
447        super(context, attrs, defStyle);
448        mText = "";
449
450        mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
451        mTextPaint.density = getResources().getDisplayMetrics().density;
452        mTextPaint.setCompatibilityScaling(
453                getResources().getCompatibilityInfo().applicationScale);
454
455        // If we get the paint from the skin, we should set it to left, since
456        // the layout always wants it to be left.
457        // mTextPaint.setTextAlign(Paint.Align.LEFT);
458
459        mHighlightPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
460        mHighlightPaint.setCompatibilityScaling(
461                getResources().getCompatibilityInfo().applicationScale);
462
463        mMovement = getDefaultMovementMethod();
464        mTransformation = null;
465
466        int textColorHighlight = 0;
467        ColorStateList textColor = null;
468        ColorStateList textColorHint = null;
469        ColorStateList textColorLink = null;
470        int textSize = 15;
471        int typefaceIndex = -1;
472        int styleIndex = -1;
473        boolean allCaps = false;
474
475        final Resources.Theme theme = context.getTheme();
476
477        /*
478         * Look the appearance up without checking first if it exists because
479         * almost every TextView has one and it greatly simplifies the logic
480         * to be able to parse the appearance first and then let specific tags
481         * for this View override it.
482         */
483        TypedArray a = theme.obtainStyledAttributes(
484                    attrs, com.android.internal.R.styleable.TextViewAppearance, defStyle, 0);
485        TypedArray appearance = null;
486        int ap = a.getResourceId(
487                com.android.internal.R.styleable.TextViewAppearance_textAppearance, -1);
488        a.recycle();
489        if (ap != -1) {
490            appearance = theme.obtainStyledAttributes(
491                    ap, com.android.internal.R.styleable.TextAppearance);
492        }
493        if (appearance != null) {
494            int n = appearance.getIndexCount();
495            for (int i = 0; i < n; i++) {
496                int attr = appearance.getIndex(i);
497
498                switch (attr) {
499                case com.android.internal.R.styleable.TextAppearance_textColorHighlight:
500                    textColorHighlight = appearance.getColor(attr, textColorHighlight);
501                    break;
502
503                case com.android.internal.R.styleable.TextAppearance_textColor:
504                    textColor = appearance.getColorStateList(attr);
505                    break;
506
507                case com.android.internal.R.styleable.TextAppearance_textColorHint:
508                    textColorHint = appearance.getColorStateList(attr);
509                    break;
510
511                case com.android.internal.R.styleable.TextAppearance_textColorLink:
512                    textColorLink = appearance.getColorStateList(attr);
513                    break;
514
515                case com.android.internal.R.styleable.TextAppearance_textSize:
516                    textSize = appearance.getDimensionPixelSize(attr, textSize);
517                    break;
518
519                case com.android.internal.R.styleable.TextAppearance_typeface:
520                    typefaceIndex = appearance.getInt(attr, -1);
521                    break;
522
523                case com.android.internal.R.styleable.TextAppearance_textStyle:
524                    styleIndex = appearance.getInt(attr, -1);
525                    break;
526
527                case com.android.internal.R.styleable.TextAppearance_textAllCaps:
528                    allCaps = appearance.getBoolean(attr, false);
529                    break;
530                }
531            }
532
533            appearance.recycle();
534        }
535
536        boolean editable = getDefaultEditable();
537        CharSequence inputMethod = null;
538        int numeric = 0;
539        CharSequence digits = null;
540        boolean phone = false;
541        boolean autotext = false;
542        int autocap = -1;
543        int buffertype = 0;
544        boolean selectallonfocus = false;
545        Drawable drawableLeft = null, drawableTop = null, drawableRight = null,
546            drawableBottom = null, drawableStart = null, drawableEnd = null;
547        int drawablePadding = 0;
548        int ellipsize = -1;
549        boolean singleLine = false;
550        int maxlength = -1;
551        CharSequence text = "";
552        CharSequence hint = null;
553        int shadowcolor = 0;
554        float dx = 0, dy = 0, r = 0;
555        boolean password = false;
556        int inputType = EditorInfo.TYPE_NULL;
557
558        a = theme.obtainStyledAttributes(
559                    attrs, com.android.internal.R.styleable.TextView, defStyle, 0);
560
561        int n = a.getIndexCount();
562        for (int i = 0; i < n; i++) {
563            int attr = a.getIndex(i);
564
565            switch (attr) {
566            case com.android.internal.R.styleable.TextView_editable:
567                editable = a.getBoolean(attr, editable);
568                break;
569
570            case com.android.internal.R.styleable.TextView_inputMethod:
571                inputMethod = a.getText(attr);
572                break;
573
574            case com.android.internal.R.styleable.TextView_numeric:
575                numeric = a.getInt(attr, numeric);
576                break;
577
578            case com.android.internal.R.styleable.TextView_digits:
579                digits = a.getText(attr);
580                break;
581
582            case com.android.internal.R.styleable.TextView_phoneNumber:
583                phone = a.getBoolean(attr, phone);
584                break;
585
586            case com.android.internal.R.styleable.TextView_autoText:
587                autotext = a.getBoolean(attr, autotext);
588                break;
589
590            case com.android.internal.R.styleable.TextView_capitalize:
591                autocap = a.getInt(attr, autocap);
592                break;
593
594            case com.android.internal.R.styleable.TextView_bufferType:
595                buffertype = a.getInt(attr, buffertype);
596                break;
597
598            case com.android.internal.R.styleable.TextView_selectAllOnFocus:
599                selectallonfocus = a.getBoolean(attr, selectallonfocus);
600                break;
601
602            case com.android.internal.R.styleable.TextView_autoLink:
603                mAutoLinkMask = a.getInt(attr, 0);
604                break;
605
606            case com.android.internal.R.styleable.TextView_linksClickable:
607                mLinksClickable = a.getBoolean(attr, true);
608                break;
609
610            case com.android.internal.R.styleable.TextView_drawableLeft:
611                drawableLeft = a.getDrawable(attr);
612                break;
613
614            case com.android.internal.R.styleable.TextView_drawableTop:
615                drawableTop = a.getDrawable(attr);
616                break;
617
618            case com.android.internal.R.styleable.TextView_drawableRight:
619                drawableRight = a.getDrawable(attr);
620                break;
621
622            case com.android.internal.R.styleable.TextView_drawableBottom:
623                drawableBottom = a.getDrawable(attr);
624                break;
625
626            case com.android.internal.R.styleable.TextView_drawableStart:
627                drawableStart = a.getDrawable(attr);
628                break;
629
630            case com.android.internal.R.styleable.TextView_drawableEnd:
631                drawableEnd = a.getDrawable(attr);
632                break;
633
634            case com.android.internal.R.styleable.TextView_drawablePadding:
635                drawablePadding = a.getDimensionPixelSize(attr, drawablePadding);
636                break;
637
638            case com.android.internal.R.styleable.TextView_maxLines:
639                setMaxLines(a.getInt(attr, -1));
640                break;
641
642            case com.android.internal.R.styleable.TextView_maxHeight:
643                setMaxHeight(a.getDimensionPixelSize(attr, -1));
644                break;
645
646            case com.android.internal.R.styleable.TextView_lines:
647                setLines(a.getInt(attr, -1));
648                break;
649
650            case com.android.internal.R.styleable.TextView_height:
651                setHeight(a.getDimensionPixelSize(attr, -1));
652                break;
653
654            case com.android.internal.R.styleable.TextView_minLines:
655                setMinLines(a.getInt(attr, -1));
656                break;
657
658            case com.android.internal.R.styleable.TextView_minHeight:
659                setMinHeight(a.getDimensionPixelSize(attr, -1));
660                break;
661
662            case com.android.internal.R.styleable.TextView_maxEms:
663                setMaxEms(a.getInt(attr, -1));
664                break;
665
666            case com.android.internal.R.styleable.TextView_maxWidth:
667                setMaxWidth(a.getDimensionPixelSize(attr, -1));
668                break;
669
670            case com.android.internal.R.styleable.TextView_ems:
671                setEms(a.getInt(attr, -1));
672                break;
673
674            case com.android.internal.R.styleable.TextView_width:
675                setWidth(a.getDimensionPixelSize(attr, -1));
676                break;
677
678            case com.android.internal.R.styleable.TextView_minEms:
679                setMinEms(a.getInt(attr, -1));
680                break;
681
682            case com.android.internal.R.styleable.TextView_minWidth:
683                setMinWidth(a.getDimensionPixelSize(attr, -1));
684                break;
685
686            case com.android.internal.R.styleable.TextView_gravity:
687                setGravity(a.getInt(attr, -1));
688                break;
689
690            case com.android.internal.R.styleable.TextView_hint:
691                hint = a.getText(attr);
692                break;
693
694            case com.android.internal.R.styleable.TextView_text:
695                text = a.getText(attr);
696                break;
697
698            case com.android.internal.R.styleable.TextView_scrollHorizontally:
699                if (a.getBoolean(attr, false)) {
700                    setHorizontallyScrolling(true);
701                }
702                break;
703
704            case com.android.internal.R.styleable.TextView_singleLine:
705                singleLine = a.getBoolean(attr, singleLine);
706                break;
707
708            case com.android.internal.R.styleable.TextView_ellipsize:
709                ellipsize = a.getInt(attr, ellipsize);
710                break;
711
712            case com.android.internal.R.styleable.TextView_marqueeRepeatLimit:
713                setMarqueeRepeatLimit(a.getInt(attr, mMarqueeRepeatLimit));
714                break;
715
716            case com.android.internal.R.styleable.TextView_includeFontPadding:
717                if (!a.getBoolean(attr, true)) {
718                    setIncludeFontPadding(false);
719                }
720                break;
721
722            case com.android.internal.R.styleable.TextView_cursorVisible:
723                if (!a.getBoolean(attr, true)) {
724                    setCursorVisible(false);
725                }
726                break;
727
728            case com.android.internal.R.styleable.TextView_maxLength:
729                maxlength = a.getInt(attr, -1);
730                break;
731
732            case com.android.internal.R.styleable.TextView_textScaleX:
733                setTextScaleX(a.getFloat(attr, 1.0f));
734                break;
735
736            case com.android.internal.R.styleable.TextView_freezesText:
737                mFreezesText = a.getBoolean(attr, false);
738                break;
739
740            case com.android.internal.R.styleable.TextView_shadowColor:
741                shadowcolor = a.getInt(attr, 0);
742                break;
743
744            case com.android.internal.R.styleable.TextView_shadowDx:
745                dx = a.getFloat(attr, 0);
746                break;
747
748            case com.android.internal.R.styleable.TextView_shadowDy:
749                dy = a.getFloat(attr, 0);
750                break;
751
752            case com.android.internal.R.styleable.TextView_shadowRadius:
753                r = a.getFloat(attr, 0);
754                break;
755
756            case com.android.internal.R.styleable.TextView_enabled:
757                setEnabled(a.getBoolean(attr, isEnabled()));
758                break;
759
760            case com.android.internal.R.styleable.TextView_textColorHighlight:
761                textColorHighlight = a.getColor(attr, textColorHighlight);
762                break;
763
764            case com.android.internal.R.styleable.TextView_textColor:
765                textColor = a.getColorStateList(attr);
766                break;
767
768            case com.android.internal.R.styleable.TextView_textColorHint:
769                textColorHint = a.getColorStateList(attr);
770                break;
771
772            case com.android.internal.R.styleable.TextView_textColorLink:
773                textColorLink = a.getColorStateList(attr);
774                break;
775
776            case com.android.internal.R.styleable.TextView_textSize:
777                textSize = a.getDimensionPixelSize(attr, textSize);
778                break;
779
780            case com.android.internal.R.styleable.TextView_typeface:
781                typefaceIndex = a.getInt(attr, typefaceIndex);
782                break;
783
784            case com.android.internal.R.styleable.TextView_textStyle:
785                styleIndex = a.getInt(attr, styleIndex);
786                break;
787
788            case com.android.internal.R.styleable.TextView_password:
789                password = a.getBoolean(attr, password);
790                break;
791
792            case com.android.internal.R.styleable.TextView_lineSpacingExtra:
793                mSpacingAdd = a.getDimensionPixelSize(attr, (int) mSpacingAdd);
794                break;
795
796            case com.android.internal.R.styleable.TextView_lineSpacingMultiplier:
797                mSpacingMult = a.getFloat(attr, mSpacingMult);
798                break;
799
800            case com.android.internal.R.styleable.TextView_inputType:
801                inputType = a.getInt(attr, mInputType);
802                break;
803
804            case com.android.internal.R.styleable.TextView_imeOptions:
805                if (mInputContentType == null) {
806                    mInputContentType = new InputContentType();
807                }
808                mInputContentType.imeOptions = a.getInt(attr,
809                        mInputContentType.imeOptions);
810                break;
811
812            case com.android.internal.R.styleable.TextView_imeActionLabel:
813                if (mInputContentType == null) {
814                    mInputContentType = new InputContentType();
815                }
816                mInputContentType.imeActionLabel = a.getText(attr);
817                break;
818
819            case com.android.internal.R.styleable.TextView_imeActionId:
820                if (mInputContentType == null) {
821                    mInputContentType = new InputContentType();
822                }
823                mInputContentType.imeActionId = a.getInt(attr,
824                        mInputContentType.imeActionId);
825                break;
826
827            case com.android.internal.R.styleable.TextView_privateImeOptions:
828                setPrivateImeOptions(a.getString(attr));
829                break;
830
831            case com.android.internal.R.styleable.TextView_editorExtras:
832                try {
833                    setInputExtras(a.getResourceId(attr, 0));
834                } catch (XmlPullParserException e) {
835                    Log.w(LOG_TAG, "Failure reading input extras", e);
836                } catch (IOException e) {
837                    Log.w(LOG_TAG, "Failure reading input extras", e);
838                }
839                break;
840
841            case com.android.internal.R.styleable.TextView_textCursorDrawable:
842                mCursorDrawableRes = a.getResourceId(attr, 0);
843                break;
844
845            case com.android.internal.R.styleable.TextView_textSelectHandleLeft:
846                mTextSelectHandleLeftRes = a.getResourceId(attr, 0);
847                break;
848
849            case com.android.internal.R.styleable.TextView_textSelectHandleRight:
850                mTextSelectHandleRightRes = a.getResourceId(attr, 0);
851                break;
852
853            case com.android.internal.R.styleable.TextView_textSelectHandle:
854                mTextSelectHandleRes = a.getResourceId(attr, 0);
855                break;
856
857            case com.android.internal.R.styleable.TextView_textEditSuggestionItemLayout:
858                mTextEditSuggestionItemLayout = a.getResourceId(attr, 0);
859                break;
860
861            case com.android.internal.R.styleable.TextView_textIsSelectable:
862                mTextIsSelectable = a.getBoolean(attr, false);
863                break;
864
865            case com.android.internal.R.styleable.TextView_textAllCaps:
866                allCaps = a.getBoolean(attr, false);
867                break;
868            }
869        }
870        a.recycle();
871
872        BufferType bufferType = BufferType.EDITABLE;
873
874        final int variation =
875                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
876        final boolean passwordInputType = variation
877                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD);
878        final boolean webPasswordInputType = variation
879                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD);
880        final boolean numberPasswordInputType = variation
881                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
882
883        if (inputMethod != null) {
884            Class<?> c;
885
886            try {
887                c = Class.forName(inputMethod.toString());
888            } catch (ClassNotFoundException ex) {
889                throw new RuntimeException(ex);
890            }
891
892            try {
893                mInput = (KeyListener) c.newInstance();
894            } catch (InstantiationException ex) {
895                throw new RuntimeException(ex);
896            } catch (IllegalAccessException ex) {
897                throw new RuntimeException(ex);
898            }
899            try {
900                mInputType = inputType != EditorInfo.TYPE_NULL
901                        ? inputType
902                        : mInput.getInputType();
903            } catch (IncompatibleClassChangeError e) {
904                mInputType = EditorInfo.TYPE_CLASS_TEXT;
905            }
906        } else if (digits != null) {
907            mInput = DigitsKeyListener.getInstance(digits.toString());
908            // If no input type was specified, we will default to generic
909            // text, since we can't tell the IME about the set of digits
910            // that was selected.
911            mInputType = inputType != EditorInfo.TYPE_NULL
912                    ? inputType : EditorInfo.TYPE_CLASS_TEXT;
913        } else if (inputType != EditorInfo.TYPE_NULL) {
914            setInputType(inputType, true);
915            // If set, the input type overrides what was set using the deprecated singleLine flag.
916            singleLine = !isMultilineInputType(inputType);
917        } else if (phone) {
918            mInput = DialerKeyListener.getInstance();
919            mInputType = inputType = EditorInfo.TYPE_CLASS_PHONE;
920        } else if (numeric != 0) {
921            mInput = DigitsKeyListener.getInstance((numeric & SIGNED) != 0,
922                                                   (numeric & DECIMAL) != 0);
923            inputType = EditorInfo.TYPE_CLASS_NUMBER;
924            if ((numeric & SIGNED) != 0) {
925                inputType |= EditorInfo.TYPE_NUMBER_FLAG_SIGNED;
926            }
927            if ((numeric & DECIMAL) != 0) {
928                inputType |= EditorInfo.TYPE_NUMBER_FLAG_DECIMAL;
929            }
930            mInputType = inputType;
931        } else if (autotext || autocap != -1) {
932            TextKeyListener.Capitalize cap;
933
934            inputType = EditorInfo.TYPE_CLASS_TEXT;
935
936            switch (autocap) {
937            case 1:
938                cap = TextKeyListener.Capitalize.SENTENCES;
939                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES;
940                break;
941
942            case 2:
943                cap = TextKeyListener.Capitalize.WORDS;
944                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS;
945                break;
946
947            case 3:
948                cap = TextKeyListener.Capitalize.CHARACTERS;
949                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS;
950                break;
951
952            default:
953                cap = TextKeyListener.Capitalize.NONE;
954                break;
955            }
956
957            mInput = TextKeyListener.getInstance(autotext, cap);
958            mInputType = inputType;
959        } else if (mTextIsSelectable) {
960            // Prevent text changes from keyboard.
961            mInputType = EditorInfo.TYPE_NULL;
962            mInput = null;
963            bufferType = BufferType.SPANNABLE;
964            // Required to request focus while in touch mode.
965            setFocusableInTouchMode(true);
966            // So that selection can be changed using arrow keys and touch is handled.
967            setMovementMethod(ArrowKeyMovementMethod.getInstance());
968        } else if (editable) {
969            mInput = TextKeyListener.getInstance();
970            mInputType = EditorInfo.TYPE_CLASS_TEXT;
971        } else {
972            mInput = null;
973
974            switch (buffertype) {
975                case 0:
976                    bufferType = BufferType.NORMAL;
977                    break;
978                case 1:
979                    bufferType = BufferType.SPANNABLE;
980                    break;
981                case 2:
982                    bufferType = BufferType.EDITABLE;
983                    break;
984            }
985        }
986
987        // mInputType has been set from inputType, possibly modified by mInputMethod.
988        // Specialize mInputType to [web]password if we have a text class and the original input
989        // type was a password.
990        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
991            if (password || passwordInputType) {
992                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
993                        | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD;
994            }
995            if (webPasswordInputType) {
996                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
997                        | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD;
998            }
999        } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) {
1000            if (numberPasswordInputType) {
1001                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
1002                        | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD;
1003            }
1004        }
1005
1006        if (selectallonfocus) {
1007            mSelectAllOnFocus = true;
1008
1009            if (bufferType == BufferType.NORMAL)
1010                bufferType = BufferType.SPANNABLE;
1011        }
1012
1013        setCompoundDrawablesWithIntrinsicBounds(
1014            drawableLeft, drawableTop, drawableRight, drawableBottom);
1015        setRelativeDrawablesIfNeeded(drawableStart, drawableEnd);
1016        setCompoundDrawablePadding(drawablePadding);
1017
1018        // Same as setSingleLine(), but make sure the transformation method and the maximum number
1019        // of lines of height are unchanged for multi-line TextViews.
1020        setInputTypeSingleLine(singleLine);
1021        applySingleLine(singleLine, singleLine, singleLine);
1022
1023        if (singleLine && mInput == null && ellipsize < 0) {
1024                ellipsize = 3; // END
1025        }
1026
1027        switch (ellipsize) {
1028            case 1:
1029                setEllipsize(TextUtils.TruncateAt.START);
1030                break;
1031            case 2:
1032                setEllipsize(TextUtils.TruncateAt.MIDDLE);
1033                break;
1034            case 3:
1035                setEllipsize(TextUtils.TruncateAt.END);
1036                break;
1037            case 4:
1038                if (ViewConfiguration.get(context).isFadingMarqueeEnabled()) {
1039                    setHorizontalFadingEdgeEnabled(true);
1040                    mMarqueeFadeMode = MARQUEE_FADE_NORMAL;
1041                } else {
1042                    setHorizontalFadingEdgeEnabled(false);
1043                    mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
1044                }
1045                setEllipsize(TextUtils.TruncateAt.MARQUEE);
1046                break;
1047        }
1048
1049        setTextColor(textColor != null ? textColor : ColorStateList.valueOf(0xFF000000));
1050        setHintTextColor(textColorHint);
1051        setLinkTextColor(textColorLink);
1052        if (textColorHighlight != 0) {
1053            setHighlightColor(textColorHighlight);
1054        }
1055        setRawTextSize(textSize);
1056
1057        if (allCaps) {
1058            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
1059        }
1060
1061        if (password || passwordInputType || webPasswordInputType || numberPasswordInputType) {
1062            setTransformationMethod(PasswordTransformationMethod.getInstance());
1063            typefaceIndex = MONOSPACE;
1064        } else if ((mInputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION))
1065                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)) {
1066            typefaceIndex = MONOSPACE;
1067        }
1068
1069        setTypefaceByIndex(typefaceIndex, styleIndex);
1070
1071        if (shadowcolor != 0) {
1072            setShadowLayer(r, dx, dy, shadowcolor);
1073        }
1074
1075        if (maxlength >= 0) {
1076            setFilters(new InputFilter[] { new InputFilter.LengthFilter(maxlength) });
1077        } else {
1078            setFilters(NO_FILTERS);
1079        }
1080
1081        setText(text, bufferType);
1082        if (hint != null) setHint(hint);
1083
1084        /*
1085         * Views are not normally focusable unless specified to be.
1086         * However, TextViews that have input or movement methods *are*
1087         * focusable by default.
1088         */
1089        a = context.obtainStyledAttributes(attrs,
1090                                           com.android.internal.R.styleable.View,
1091                                           defStyle, 0);
1092
1093        boolean focusable = mMovement != null || mInput != null;
1094        boolean clickable = focusable;
1095        boolean longClickable = focusable;
1096
1097        n = a.getIndexCount();
1098        for (int i = 0; i < n; i++) {
1099            int attr = a.getIndex(i);
1100
1101            switch (attr) {
1102            case com.android.internal.R.styleable.View_focusable:
1103                focusable = a.getBoolean(attr, focusable);
1104                break;
1105
1106            case com.android.internal.R.styleable.View_clickable:
1107                clickable = a.getBoolean(attr, clickable);
1108                break;
1109
1110            case com.android.internal.R.styleable.View_longClickable:
1111                longClickable = a.getBoolean(attr, longClickable);
1112                break;
1113            }
1114        }
1115        a.recycle();
1116
1117        setFocusable(focusable);
1118        setClickable(clickable);
1119        setLongClickable(longClickable);
1120
1121        prepareCursorControllers();
1122
1123        final ViewConfiguration viewConfiguration = ViewConfiguration.get(context);
1124        final int touchSlop = viewConfiguration.getScaledTouchSlop();
1125        mSquaredTouchSlopDistance = touchSlop * touchSlop;
1126    }
1127
1128    private void setTypefaceByIndex(int typefaceIndex, int styleIndex) {
1129        Typeface tf = null;
1130        switch (typefaceIndex) {
1131            case SANS:
1132                tf = Typeface.SANS_SERIF;
1133                break;
1134
1135            case SERIF:
1136                tf = Typeface.SERIF;
1137                break;
1138
1139            case MONOSPACE:
1140                tf = Typeface.MONOSPACE;
1141                break;
1142        }
1143
1144        setTypeface(tf, styleIndex);
1145    }
1146
1147    private void setRelativeDrawablesIfNeeded(Drawable start, Drawable end) {
1148        boolean hasRelativeDrawables = (start != null) || (end != null);
1149        if (hasRelativeDrawables) {
1150            Drawables dr = mDrawables;
1151            if (dr == null) {
1152                mDrawables = dr = new Drawables();
1153            }
1154            final Rect compoundRect = dr.mCompoundRect;
1155            int[] state = getDrawableState();
1156            if (start != null) {
1157                start.setBounds(0, 0, start.getIntrinsicWidth(), start.getIntrinsicHeight());
1158                start.setState(state);
1159                start.copyBounds(compoundRect);
1160                start.setCallback(this);
1161
1162                dr.mDrawableStart = start;
1163                dr.mDrawableSizeStart = compoundRect.width();
1164                dr.mDrawableHeightStart = compoundRect.height();
1165            } else {
1166                dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1167            }
1168            if (end != null) {
1169                end.setBounds(0, 0, end.getIntrinsicWidth(), end.getIntrinsicHeight());
1170                end.setState(state);
1171                end.copyBounds(compoundRect);
1172                end.setCallback(this);
1173
1174                dr.mDrawableEnd = end;
1175                dr.mDrawableSizeEnd = compoundRect.width();
1176                dr.mDrawableHeightEnd = compoundRect.height();
1177            } else {
1178                dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1179            }
1180        }
1181    }
1182
1183    @Override
1184    public void setEnabled(boolean enabled) {
1185        if (enabled == isEnabled()) {
1186            return;
1187        }
1188
1189        if (!enabled) {
1190            // Hide the soft input if the currently active TextView is disabled
1191            InputMethodManager imm = InputMethodManager.peekInstance();
1192            if (imm != null && imm.isActive(this)) {
1193                imm.hideSoftInputFromWindow(getWindowToken(), 0);
1194            }
1195        }
1196        super.setEnabled(enabled);
1197        prepareCursorControllers();
1198        if (enabled) {
1199            // Make sure IME is updated with current editor info.
1200            InputMethodManager imm = InputMethodManager.peekInstance();
1201            if (imm != null) imm.restartInput(this);
1202        }
1203    }
1204
1205    /**
1206     * Sets the typeface and style in which the text should be displayed,
1207     * and turns on the fake bold and italic bits in the Paint if the
1208     * Typeface that you provided does not have all the bits in the
1209     * style that you specified.
1210     *
1211     * @attr ref android.R.styleable#TextView_typeface
1212     * @attr ref android.R.styleable#TextView_textStyle
1213     */
1214    public void setTypeface(Typeface tf, int style) {
1215        if (style > 0) {
1216            if (tf == null) {
1217                tf = Typeface.defaultFromStyle(style);
1218            } else {
1219                tf = Typeface.create(tf, style);
1220            }
1221
1222            setTypeface(tf);
1223            // now compute what (if any) algorithmic styling is needed
1224            int typefaceStyle = tf != null ? tf.getStyle() : 0;
1225            int need = style & ~typefaceStyle;
1226            mTextPaint.setFakeBoldText((need & Typeface.BOLD) != 0);
1227            mTextPaint.setTextSkewX((need & Typeface.ITALIC) != 0 ? -0.25f : 0);
1228        } else {
1229            mTextPaint.setFakeBoldText(false);
1230            mTextPaint.setTextSkewX(0);
1231            setTypeface(tf);
1232        }
1233    }
1234
1235    /**
1236     * Subclasses override this to specify that they have a KeyListener
1237     * by default even if not specifically called for in the XML options.
1238     */
1239    protected boolean getDefaultEditable() {
1240        return false;
1241    }
1242
1243    /**
1244     * Subclasses override this to specify a default movement method.
1245     */
1246    protected MovementMethod getDefaultMovementMethod() {
1247        return null;
1248    }
1249
1250    /**
1251     * Return the text the TextView is displaying. If setText() was called with
1252     * an argument of BufferType.SPANNABLE or BufferType.EDITABLE, you can cast
1253     * the return value from this method to Spannable or Editable, respectively.
1254     *
1255     * Note: The content of the return value should not be modified. If you want
1256     * a modifiable one, you should make your own copy first.
1257     */
1258    @ViewDebug.CapturedViewProperty
1259    public CharSequence getText() {
1260        return mText;
1261    }
1262
1263    /**
1264     * Returns the length, in characters, of the text managed by this TextView
1265     */
1266    public int length() {
1267        return mText.length();
1268    }
1269
1270    /**
1271     * Return the text the TextView is displaying as an Editable object.  If
1272     * the text is not editable, null is returned.
1273     *
1274     * @see #getText
1275     */
1276    public Editable getEditableText() {
1277        return (mText instanceof Editable) ? (Editable)mText : null;
1278    }
1279
1280    /**
1281     * @return the height of one standard line in pixels.  Note that markup
1282     * within the text can cause individual lines to be taller or shorter
1283     * than this height, and the layout may contain additional first-
1284     * or last-line padding.
1285     */
1286    public int getLineHeight() {
1287        return FastMath.round(mTextPaint.getFontMetricsInt(null) * mSpacingMult + mSpacingAdd);
1288    }
1289
1290    /**
1291     * @return the Layout that is currently being used to display the text.
1292     * This can be null if the text or width has recently changes.
1293     */
1294    public final Layout getLayout() {
1295        return mLayout;
1296    }
1297
1298    /**
1299     * @return the current key listener for this TextView.
1300     * This will frequently be null for non-EditText TextViews.
1301     */
1302    public final KeyListener getKeyListener() {
1303        return mInput;
1304    }
1305
1306    /**
1307     * Sets the key listener to be used with this TextView.  This can be null
1308     * to disallow user input.  Note that this method has significant and
1309     * subtle interactions with soft keyboards and other input method:
1310     * see {@link KeyListener#getInputType() KeyListener.getContentType()}
1311     * for important details.  Calling this method will replace the current
1312     * content type of the text view with the content type returned by the
1313     * key listener.
1314     * <p>
1315     * Be warned that if you want a TextView with a key listener or movement
1316     * method not to be focusable, or if you want a TextView without a
1317     * key listener or movement method to be focusable, you must call
1318     * {@link #setFocusable} again after calling this to get the focusability
1319     * back the way you want it.
1320     *
1321     * @attr ref android.R.styleable#TextView_numeric
1322     * @attr ref android.R.styleable#TextView_digits
1323     * @attr ref android.R.styleable#TextView_phoneNumber
1324     * @attr ref android.R.styleable#TextView_inputMethod
1325     * @attr ref android.R.styleable#TextView_capitalize
1326     * @attr ref android.R.styleable#TextView_autoText
1327     */
1328    public void setKeyListener(KeyListener input) {
1329        setKeyListenerOnly(input);
1330        fixFocusableAndClickableSettings();
1331
1332        if (input != null) {
1333            try {
1334                mInputType = mInput.getInputType();
1335            } catch (IncompatibleClassChangeError e) {
1336                mInputType = EditorInfo.TYPE_CLASS_TEXT;
1337            }
1338            // Change inputType, without affecting transformation.
1339            // No need to applySingleLine since mSingleLine is unchanged.
1340            setInputTypeSingleLine(mSingleLine);
1341        } else {
1342            mInputType = EditorInfo.TYPE_NULL;
1343        }
1344
1345        InputMethodManager imm = InputMethodManager.peekInstance();
1346        if (imm != null) imm.restartInput(this);
1347    }
1348
1349    private void setKeyListenerOnly(KeyListener input) {
1350        mInput = input;
1351        if (mInput != null && !(mText instanceof Editable))
1352            setText(mText);
1353
1354        setFilters((Editable) mText, mFilters);
1355    }
1356
1357    /**
1358     * @return the movement method being used for this TextView.
1359     * This will frequently be null for non-EditText TextViews.
1360     */
1361    public final MovementMethod getMovementMethod() {
1362        return mMovement;
1363    }
1364
1365    /**
1366     * Sets the movement method (arrow key handler) to be used for
1367     * this TextView.  This can be null to disallow using the arrow keys
1368     * to move the cursor or scroll the view.
1369     * <p>
1370     * Be warned that if you want a TextView with a key listener or movement
1371     * method not to be focusable, or if you want a TextView without a
1372     * key listener or movement method to be focusable, you must call
1373     * {@link #setFocusable} again after calling this to get the focusability
1374     * back the way you want it.
1375     */
1376    public final void setMovementMethod(MovementMethod movement) {
1377        mMovement = movement;
1378
1379        if (mMovement != null && !(mText instanceof Spannable))
1380            setText(mText);
1381
1382        fixFocusableAndClickableSettings();
1383
1384        // SelectionModifierCursorController depends on textCanBeSelected, which depends on mMovement
1385        prepareCursorControllers();
1386    }
1387
1388    private void fixFocusableAndClickableSettings() {
1389        if ((mMovement != null) || mInput != null) {
1390            setFocusable(true);
1391            setClickable(true);
1392            setLongClickable(true);
1393        } else {
1394            setFocusable(false);
1395            setClickable(false);
1396            setLongClickable(false);
1397        }
1398    }
1399
1400    /**
1401     * @return the current transformation method for this TextView.
1402     * This will frequently be null except for single-line and password
1403     * fields.
1404     */
1405    public final TransformationMethod getTransformationMethod() {
1406        return mTransformation;
1407    }
1408
1409    /**
1410     * Sets the transformation that is applied to the text that this
1411     * TextView is displaying.
1412     *
1413     * @attr ref android.R.styleable#TextView_password
1414     * @attr ref android.R.styleable#TextView_singleLine
1415     */
1416    public final void setTransformationMethod(TransformationMethod method) {
1417        if (method == mTransformation) {
1418            // Avoid the setText() below if the transformation is
1419            // the same.
1420            return;
1421        }
1422        if (mTransformation != null) {
1423            if (mText instanceof Spannable) {
1424                ((Spannable) mText).removeSpan(mTransformation);
1425            }
1426        }
1427
1428        mTransformation = method;
1429
1430        if (method instanceof TransformationMethod2) {
1431            TransformationMethod2 method2 = (TransformationMethod2) method;
1432            mAllowTransformationLengthChange = !mTextIsSelectable && !(mText instanceof Editable);
1433            method2.setLengthChangesAllowed(mAllowTransformationLengthChange);
1434        } else {
1435            mAllowTransformationLengthChange = false;
1436        }
1437
1438        setText(mText);
1439    }
1440
1441    /**
1442     * Returns the top padding of the view, plus space for the top
1443     * Drawable if any.
1444     */
1445    public int getCompoundPaddingTop() {
1446        final Drawables dr = mDrawables;
1447        if (dr == null || dr.mDrawableTop == null) {
1448            return mPaddingTop;
1449        } else {
1450            return mPaddingTop + dr.mDrawablePadding + dr.mDrawableSizeTop;
1451        }
1452    }
1453
1454    /**
1455     * Returns the bottom padding of the view, plus space for the bottom
1456     * Drawable if any.
1457     */
1458    public int getCompoundPaddingBottom() {
1459        final Drawables dr = mDrawables;
1460        if (dr == null || dr.mDrawableBottom == null) {
1461            return mPaddingBottom;
1462        } else {
1463            return mPaddingBottom + dr.mDrawablePadding + dr.mDrawableSizeBottom;
1464        }
1465    }
1466
1467    /**
1468     * Returns the left padding of the view, plus space for the left
1469     * Drawable if any.
1470     */
1471    public int getCompoundPaddingLeft() {
1472        final Drawables dr = mDrawables;
1473        if (dr == null || dr.mDrawableLeft == null) {
1474            return mPaddingLeft;
1475        } else {
1476            return mPaddingLeft + dr.mDrawablePadding + dr.mDrawableSizeLeft;
1477        }
1478    }
1479
1480    /**
1481     * Returns the right padding of the view, plus space for the right
1482     * Drawable if any.
1483     */
1484    public int getCompoundPaddingRight() {
1485        final Drawables dr = mDrawables;
1486        if (dr == null || dr.mDrawableRight == null) {
1487            return mPaddingRight;
1488        } else {
1489            return mPaddingRight + dr.mDrawablePadding + dr.mDrawableSizeRight;
1490        }
1491    }
1492
1493    /**
1494     * Returns the start padding of the view, plus space for the start
1495     * Drawable if any.
1496     *
1497     * @hide
1498     */
1499    public int getCompoundPaddingStart() {
1500        resolveDrawables();
1501        switch(getResolvedLayoutDirection()) {
1502            default:
1503            case LAYOUT_DIRECTION_LTR:
1504                return getCompoundPaddingLeft();
1505            case LAYOUT_DIRECTION_RTL:
1506                return getCompoundPaddingRight();
1507        }
1508    }
1509
1510    /**
1511     * Returns the end padding of the view, plus space for the end
1512     * Drawable if any.
1513     *
1514     * @hide
1515     */
1516    public int getCompoundPaddingEnd() {
1517        resolveDrawables();
1518        switch(getResolvedLayoutDirection()) {
1519            default:
1520            case LAYOUT_DIRECTION_LTR:
1521                return getCompoundPaddingRight();
1522            case LAYOUT_DIRECTION_RTL:
1523                return getCompoundPaddingLeft();
1524        }
1525    }
1526
1527    /**
1528     * Returns the extended top padding of the view, including both the
1529     * top Drawable if any and any extra space to keep more than maxLines
1530     * of text from showing.  It is only valid to call this after measuring.
1531     */
1532    public int getExtendedPaddingTop() {
1533        if (mMaxMode != LINES) {
1534            return getCompoundPaddingTop();
1535        }
1536
1537        if (mLayout.getLineCount() <= mMaximum) {
1538            return getCompoundPaddingTop();
1539        }
1540
1541        int top = getCompoundPaddingTop();
1542        int bottom = getCompoundPaddingBottom();
1543        int viewht = getHeight() - top - bottom;
1544        int layoutht = mLayout.getLineTop(mMaximum);
1545
1546        if (layoutht >= viewht) {
1547            return top;
1548        }
1549
1550        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1551        if (gravity == Gravity.TOP) {
1552            return top;
1553        } else if (gravity == Gravity.BOTTOM) {
1554            return top + viewht - layoutht;
1555        } else { // (gravity == Gravity.CENTER_VERTICAL)
1556            return top + (viewht - layoutht) / 2;
1557        }
1558    }
1559
1560    /**
1561     * Returns the extended bottom padding of the view, including both the
1562     * bottom Drawable if any and any extra space to keep more than maxLines
1563     * of text from showing.  It is only valid to call this after measuring.
1564     */
1565    public int getExtendedPaddingBottom() {
1566        if (mMaxMode != LINES) {
1567            return getCompoundPaddingBottom();
1568        }
1569
1570        if (mLayout.getLineCount() <= mMaximum) {
1571            return getCompoundPaddingBottom();
1572        }
1573
1574        int top = getCompoundPaddingTop();
1575        int bottom = getCompoundPaddingBottom();
1576        int viewht = getHeight() - top - bottom;
1577        int layoutht = mLayout.getLineTop(mMaximum);
1578
1579        if (layoutht >= viewht) {
1580            return bottom;
1581        }
1582
1583        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1584        if (gravity == Gravity.TOP) {
1585            return bottom + viewht - layoutht;
1586        } else if (gravity == Gravity.BOTTOM) {
1587            return bottom;
1588        } else { // (gravity == Gravity.CENTER_VERTICAL)
1589            return bottom + (viewht - layoutht) / 2;
1590        }
1591    }
1592
1593    /**
1594     * Returns the total left padding of the view, including the left
1595     * Drawable if any.
1596     */
1597    public int getTotalPaddingLeft() {
1598        return getCompoundPaddingLeft();
1599    }
1600
1601    /**
1602     * Returns the total right padding of the view, including the right
1603     * Drawable if any.
1604     */
1605    public int getTotalPaddingRight() {
1606        return getCompoundPaddingRight();
1607    }
1608
1609    /**
1610     * Returns the total start padding of the view, including the start
1611     * Drawable if any.
1612     *
1613     * @hide
1614     */
1615    public int getTotalPaddingStart() {
1616        return getCompoundPaddingStart();
1617    }
1618
1619    /**
1620     * Returns the total end padding of the view, including the end
1621     * Drawable if any.
1622     *
1623     * @hide
1624     */
1625    public int getTotalPaddingEnd() {
1626        return getCompoundPaddingEnd();
1627    }
1628
1629    /**
1630     * Returns the total top padding of the view, including the top
1631     * Drawable if any, the extra space to keep more than maxLines
1632     * from showing, and the vertical offset for gravity, if any.
1633     */
1634    public int getTotalPaddingTop() {
1635        return getExtendedPaddingTop() + getVerticalOffset(true);
1636    }
1637
1638    /**
1639     * Returns the total bottom padding of the view, including the bottom
1640     * Drawable if any, the extra space to keep more than maxLines
1641     * from showing, and the vertical offset for gravity, if any.
1642     */
1643    public int getTotalPaddingBottom() {
1644        return getExtendedPaddingBottom() + getBottomVerticalOffset(true);
1645    }
1646
1647    /**
1648     * Sets the Drawables (if any) to appear to the left of, above,
1649     * to the right of, and below the text.  Use null if you do not
1650     * want a Drawable there.  The Drawables must already have had
1651     * {@link Drawable#setBounds} called.
1652     *
1653     * @attr ref android.R.styleable#TextView_drawableLeft
1654     * @attr ref android.R.styleable#TextView_drawableTop
1655     * @attr ref android.R.styleable#TextView_drawableRight
1656     * @attr ref android.R.styleable#TextView_drawableBottom
1657     */
1658    public void setCompoundDrawables(Drawable left, Drawable top,
1659                                     Drawable right, Drawable bottom) {
1660        Drawables dr = mDrawables;
1661
1662        final boolean drawables = left != null || top != null
1663                || right != null || bottom != null;
1664
1665        if (!drawables) {
1666            // Clearing drawables...  can we free the data structure?
1667            if (dr != null) {
1668                if (dr.mDrawablePadding == 0) {
1669                    mDrawables = null;
1670                } else {
1671                    // We need to retain the last set padding, so just clear
1672                    // out all of the fields in the existing structure.
1673                    if (dr.mDrawableLeft != null) dr.mDrawableLeft.setCallback(null);
1674                    dr.mDrawableLeft = null;
1675                    if (dr.mDrawableTop != null) dr.mDrawableTop.setCallback(null);
1676                    dr.mDrawableTop = null;
1677                    if (dr.mDrawableRight != null) dr.mDrawableRight.setCallback(null);
1678                    dr.mDrawableRight = null;
1679                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.setCallback(null);
1680                    dr.mDrawableBottom = null;
1681                    dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1682                    dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1683                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1684                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1685                }
1686            }
1687        } else {
1688            if (dr == null) {
1689                mDrawables = dr = new Drawables();
1690            }
1691
1692            if (dr.mDrawableLeft != left && dr.mDrawableLeft != null) {
1693                dr.mDrawableLeft.setCallback(null);
1694            }
1695            dr.mDrawableLeft = left;
1696
1697            if (dr.mDrawableTop != top && dr.mDrawableTop != null) {
1698                dr.mDrawableTop.setCallback(null);
1699            }
1700            dr.mDrawableTop = top;
1701
1702            if (dr.mDrawableRight != right && dr.mDrawableRight != null) {
1703                dr.mDrawableRight.setCallback(null);
1704            }
1705            dr.mDrawableRight = right;
1706
1707            if (dr.mDrawableBottom != bottom && dr.mDrawableBottom != null) {
1708                dr.mDrawableBottom.setCallback(null);
1709            }
1710            dr.mDrawableBottom = bottom;
1711
1712            final Rect compoundRect = dr.mCompoundRect;
1713            int[] state;
1714
1715            state = getDrawableState();
1716
1717            if (left != null) {
1718                left.setState(state);
1719                left.copyBounds(compoundRect);
1720                left.setCallback(this);
1721                dr.mDrawableSizeLeft = compoundRect.width();
1722                dr.mDrawableHeightLeft = compoundRect.height();
1723            } else {
1724                dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1725            }
1726
1727            if (right != null) {
1728                right.setState(state);
1729                right.copyBounds(compoundRect);
1730                right.setCallback(this);
1731                dr.mDrawableSizeRight = compoundRect.width();
1732                dr.mDrawableHeightRight = compoundRect.height();
1733            } else {
1734                dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1735            }
1736
1737            if (top != null) {
1738                top.setState(state);
1739                top.copyBounds(compoundRect);
1740                top.setCallback(this);
1741                dr.mDrawableSizeTop = compoundRect.height();
1742                dr.mDrawableWidthTop = compoundRect.width();
1743            } else {
1744                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1745            }
1746
1747            if (bottom != null) {
1748                bottom.setState(state);
1749                bottom.copyBounds(compoundRect);
1750                bottom.setCallback(this);
1751                dr.mDrawableSizeBottom = compoundRect.height();
1752                dr.mDrawableWidthBottom = compoundRect.width();
1753            } else {
1754                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1755            }
1756        }
1757
1758        invalidate();
1759        requestLayout();
1760    }
1761
1762    /**
1763     * Sets the Drawables (if any) to appear to the left of, above,
1764     * to the right of, and below the text.  Use 0 if you do not
1765     * want a Drawable there. The Drawables' bounds will be set to
1766     * their intrinsic bounds.
1767     *
1768     * @param left Resource identifier of the left Drawable.
1769     * @param top Resource identifier of the top Drawable.
1770     * @param right Resource identifier of the right Drawable.
1771     * @param bottom Resource identifier of the bottom Drawable.
1772     *
1773     * @attr ref android.R.styleable#TextView_drawableLeft
1774     * @attr ref android.R.styleable#TextView_drawableTop
1775     * @attr ref android.R.styleable#TextView_drawableRight
1776     * @attr ref android.R.styleable#TextView_drawableBottom
1777     */
1778    public void setCompoundDrawablesWithIntrinsicBounds(int left, int top, int right, int bottom) {
1779        final Resources resources = getContext().getResources();
1780        setCompoundDrawablesWithIntrinsicBounds(left != 0 ? resources.getDrawable(left) : null,
1781                top != 0 ? resources.getDrawable(top) : null,
1782                right != 0 ? resources.getDrawable(right) : null,
1783                bottom != 0 ? resources.getDrawable(bottom) : null);
1784    }
1785
1786    /**
1787     * Sets the Drawables (if any) to appear to the left of, above,
1788     * to the right of, and below the text.  Use null if you do not
1789     * want a Drawable there. The Drawables' bounds will be set to
1790     * their intrinsic bounds.
1791     *
1792     * @attr ref android.R.styleable#TextView_drawableLeft
1793     * @attr ref android.R.styleable#TextView_drawableTop
1794     * @attr ref android.R.styleable#TextView_drawableRight
1795     * @attr ref android.R.styleable#TextView_drawableBottom
1796     */
1797    public void setCompoundDrawablesWithIntrinsicBounds(Drawable left, Drawable top,
1798            Drawable right, Drawable bottom) {
1799
1800        if (left != null) {
1801            left.setBounds(0, 0, left.getIntrinsicWidth(), left.getIntrinsicHeight());
1802        }
1803        if (right != null) {
1804            right.setBounds(0, 0, right.getIntrinsicWidth(), right.getIntrinsicHeight());
1805        }
1806        if (top != null) {
1807            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
1808        }
1809        if (bottom != null) {
1810            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
1811        }
1812        setCompoundDrawables(left, top, right, bottom);
1813    }
1814
1815    /**
1816     * Sets the Drawables (if any) to appear to the start of, above,
1817     * to the end of, and below the text.  Use null if you do not
1818     * want a Drawable there.  The Drawables must already have had
1819     * {@link Drawable#setBounds} called.
1820     *
1821     * @attr ref android.R.styleable#TextView_drawableStart
1822     * @attr ref android.R.styleable#TextView_drawableTop
1823     * @attr ref android.R.styleable#TextView_drawableEnd
1824     * @attr ref android.R.styleable#TextView_drawableBottom
1825     *
1826     * @hide
1827     */
1828    public void setCompoundDrawablesRelative(Drawable start, Drawable top,
1829                                     Drawable end, Drawable bottom) {
1830        Drawables dr = mDrawables;
1831
1832        final boolean drawables = start != null || top != null
1833                || end != null || bottom != null;
1834
1835        if (!drawables) {
1836            // Clearing drawables...  can we free the data structure?
1837            if (dr != null) {
1838                if (dr.mDrawablePadding == 0) {
1839                    mDrawables = null;
1840                } else {
1841                    // We need to retain the last set padding, so just clear
1842                    // out all of the fields in the existing structure.
1843                    if (dr.mDrawableStart != null) dr.mDrawableStart.setCallback(null);
1844                    dr.mDrawableStart = null;
1845                    if (dr.mDrawableTop != null) dr.mDrawableTop.setCallback(null);
1846                    dr.mDrawableTop = null;
1847                    if (dr.mDrawableEnd != null) dr.mDrawableEnd.setCallback(null);
1848                    dr.mDrawableEnd = null;
1849                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.setCallback(null);
1850                    dr.mDrawableBottom = null;
1851                    dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1852                    dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1853                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1854                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1855                }
1856            }
1857        } else {
1858            if (dr == null) {
1859                mDrawables = dr = new Drawables();
1860            }
1861
1862            if (dr.mDrawableStart != start && dr.mDrawableStart != null) {
1863                dr.mDrawableStart.setCallback(null);
1864            }
1865            dr.mDrawableStart = start;
1866
1867            if (dr.mDrawableTop != top && dr.mDrawableTop != null) {
1868                dr.mDrawableTop.setCallback(null);
1869            }
1870            dr.mDrawableTop = top;
1871
1872            if (dr.mDrawableEnd != end && dr.mDrawableEnd != null) {
1873                dr.mDrawableEnd.setCallback(null);
1874            }
1875            dr.mDrawableEnd = end;
1876
1877            if (dr.mDrawableBottom != bottom && dr.mDrawableBottom != null) {
1878                dr.mDrawableBottom.setCallback(null);
1879            }
1880            dr.mDrawableBottom = bottom;
1881
1882            final Rect compoundRect = dr.mCompoundRect;
1883            int[] state;
1884
1885            state = getDrawableState();
1886
1887            if (start != null) {
1888                start.setState(state);
1889                start.copyBounds(compoundRect);
1890                start.setCallback(this);
1891                dr.mDrawableSizeStart = compoundRect.width();
1892                dr.mDrawableHeightStart = compoundRect.height();
1893            } else {
1894                dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1895            }
1896
1897            if (end != null) {
1898                end.setState(state);
1899                end.copyBounds(compoundRect);
1900                end.setCallback(this);
1901                dr.mDrawableSizeEnd = compoundRect.width();
1902                dr.mDrawableHeightEnd = compoundRect.height();
1903            } else {
1904                dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1905            }
1906
1907            if (top != null) {
1908                top.setState(state);
1909                top.copyBounds(compoundRect);
1910                top.setCallback(this);
1911                dr.mDrawableSizeTop = compoundRect.height();
1912                dr.mDrawableWidthTop = compoundRect.width();
1913            } else {
1914                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1915            }
1916
1917            if (bottom != null) {
1918                bottom.setState(state);
1919                bottom.copyBounds(compoundRect);
1920                bottom.setCallback(this);
1921                dr.mDrawableSizeBottom = compoundRect.height();
1922                dr.mDrawableWidthBottom = compoundRect.width();
1923            } else {
1924                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1925            }
1926        }
1927
1928        resolveDrawables();
1929        invalidate();
1930        requestLayout();
1931    }
1932
1933    /**
1934     * Sets the Drawables (if any) to appear to the start of, above,
1935     * to the end of, and below the text.  Use 0 if you do not
1936     * want a Drawable there. The Drawables' bounds will be set to
1937     * their intrinsic bounds.
1938     *
1939     * @param start Resource identifier of the start Drawable.
1940     * @param top Resource identifier of the top Drawable.
1941     * @param end Resource identifier of the end Drawable.
1942     * @param bottom Resource identifier of the bottom Drawable.
1943     *
1944     * @attr ref android.R.styleable#TextView_drawableStart
1945     * @attr ref android.R.styleable#TextView_drawableTop
1946     * @attr ref android.R.styleable#TextView_drawableEnd
1947     * @attr ref android.R.styleable#TextView_drawableBottom
1948     *
1949     * @hide
1950     */
1951    public void setCompoundDrawablesRelativeWithIntrinsicBounds(int start, int top, int end,
1952            int bottom) {
1953        resetResolvedDrawables();
1954        final Resources resources = getContext().getResources();
1955        setCompoundDrawablesRelativeWithIntrinsicBounds(
1956                start != 0 ? resources.getDrawable(start) : null,
1957                top != 0 ? resources.getDrawable(top) : null,
1958                end != 0 ? resources.getDrawable(end) : null,
1959                bottom != 0 ? resources.getDrawable(bottom) : null);
1960    }
1961
1962    /**
1963     * Sets the Drawables (if any) to appear to the start of, above,
1964     * to the end of, and below the text.  Use null if you do not
1965     * want a Drawable there. The Drawables' bounds will be set to
1966     * their intrinsic bounds.
1967     *
1968     * @attr ref android.R.styleable#TextView_drawableStart
1969     * @attr ref android.R.styleable#TextView_drawableTop
1970     * @attr ref android.R.styleable#TextView_drawableEnd
1971     * @attr ref android.R.styleable#TextView_drawableBottom
1972     *
1973     * @hide
1974     */
1975    public void setCompoundDrawablesRelativeWithIntrinsicBounds(Drawable start, Drawable top,
1976            Drawable end, Drawable bottom) {
1977
1978        resetResolvedDrawables();
1979        if (start != null) {
1980            start.setBounds(0, 0, start.getIntrinsicWidth(), start.getIntrinsicHeight());
1981        }
1982        if (end != null) {
1983            end.setBounds(0, 0, end.getIntrinsicWidth(), end.getIntrinsicHeight());
1984        }
1985        if (top != null) {
1986            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
1987        }
1988        if (bottom != null) {
1989            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
1990        }
1991        setCompoundDrawablesRelative(start, top, end, bottom);
1992    }
1993
1994    /**
1995     * Returns drawables for the left, top, right, and bottom borders.
1996     */
1997    public Drawable[] getCompoundDrawables() {
1998        final Drawables dr = mDrawables;
1999        if (dr != null) {
2000            return new Drawable[] {
2001                dr.mDrawableLeft, dr.mDrawableTop, dr.mDrawableRight, dr.mDrawableBottom
2002            };
2003        } else {
2004            return new Drawable[] { null, null, null, null };
2005        }
2006    }
2007
2008    /**
2009     * Returns drawables for the start, top, end, and bottom borders.
2010     *
2011     * @hide
2012     */
2013    public Drawable[] getCompoundDrawablesRelative() {
2014        final Drawables dr = mDrawables;
2015        if (dr != null) {
2016            return new Drawable[] {
2017                dr.mDrawableStart, dr.mDrawableTop, dr.mDrawableEnd, dr.mDrawableBottom
2018            };
2019        } else {
2020            return new Drawable[] { null, null, null, null };
2021        }
2022    }
2023
2024    /**
2025     * Sets the size of the padding between the compound drawables and
2026     * the text.
2027     *
2028     * @attr ref android.R.styleable#TextView_drawablePadding
2029     */
2030    public void setCompoundDrawablePadding(int pad) {
2031        Drawables dr = mDrawables;
2032        if (pad == 0) {
2033            if (dr != null) {
2034                dr.mDrawablePadding = pad;
2035            }
2036        } else {
2037            if (dr == null) {
2038                mDrawables = dr = new Drawables();
2039            }
2040            dr.mDrawablePadding = pad;
2041        }
2042
2043        invalidate();
2044        requestLayout();
2045    }
2046
2047    /**
2048     * Returns the padding between the compound drawables and the text.
2049     */
2050    public int getCompoundDrawablePadding() {
2051        final Drawables dr = mDrawables;
2052        return dr != null ? dr.mDrawablePadding : 0;
2053    }
2054
2055    @Override
2056    public void setPadding(int left, int top, int right, int bottom) {
2057        if (left != mPaddingLeft ||
2058            right != mPaddingRight ||
2059            top != mPaddingTop ||
2060            bottom != mPaddingBottom) {
2061            nullLayouts();
2062        }
2063
2064        // the super call will requestLayout()
2065        super.setPadding(left, top, right, bottom);
2066        invalidate();
2067    }
2068
2069    /**
2070     * Gets the autolink mask of the text.  See {@link
2071     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
2072     * possible values.
2073     *
2074     * @attr ref android.R.styleable#TextView_autoLink
2075     */
2076    public final int getAutoLinkMask() {
2077        return mAutoLinkMask;
2078    }
2079
2080    /**
2081     * Sets the text color, size, style, hint color, and highlight color
2082     * from the specified TextAppearance resource.
2083     */
2084    public void setTextAppearance(Context context, int resid) {
2085        TypedArray appearance =
2086            context.obtainStyledAttributes(resid,
2087                                           com.android.internal.R.styleable.TextAppearance);
2088
2089        int color;
2090        ColorStateList colors;
2091        int ts;
2092
2093        color = appearance.getColor(com.android.internal.R.styleable.TextAppearance_textColorHighlight, 0);
2094        if (color != 0) {
2095            setHighlightColor(color);
2096        }
2097
2098        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2099                                              TextAppearance_textColor);
2100        if (colors != null) {
2101            setTextColor(colors);
2102        }
2103
2104        ts = appearance.getDimensionPixelSize(com.android.internal.R.styleable.
2105                                              TextAppearance_textSize, 0);
2106        if (ts != 0) {
2107            setRawTextSize(ts);
2108        }
2109
2110        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2111                                              TextAppearance_textColorHint);
2112        if (colors != null) {
2113            setHintTextColor(colors);
2114        }
2115
2116        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2117                                              TextAppearance_textColorLink);
2118        if (colors != null) {
2119            setLinkTextColor(colors);
2120        }
2121
2122        int typefaceIndex, styleIndex;
2123
2124        typefaceIndex = appearance.getInt(com.android.internal.R.styleable.
2125                                          TextAppearance_typeface, -1);
2126        styleIndex = appearance.getInt(com.android.internal.R.styleable.
2127                                       TextAppearance_textStyle, -1);
2128
2129        setTypefaceByIndex(typefaceIndex, styleIndex);
2130
2131        if (appearance.getBoolean(com.android.internal.R.styleable.TextAppearance_textAllCaps,
2132                false)) {
2133            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
2134        }
2135
2136        appearance.recycle();
2137    }
2138
2139    /**
2140     * @return the size (in pixels) of the default text size in this TextView.
2141     */
2142    public float getTextSize() {
2143        return mTextPaint.getTextSize();
2144    }
2145
2146    /**
2147     * Set the default text size to the given value, interpreted as "scaled
2148     * pixel" units.  This size is adjusted based on the current density and
2149     * user font size preference.
2150     *
2151     * @param size The scaled pixel size.
2152     *
2153     * @attr ref android.R.styleable#TextView_textSize
2154     */
2155    @android.view.RemotableViewMethod
2156    public void setTextSize(float size) {
2157        setTextSize(TypedValue.COMPLEX_UNIT_SP, size);
2158    }
2159
2160    /**
2161     * Set the default text size to a given unit and value.  See {@link
2162     * TypedValue} for the possible dimension units.
2163     *
2164     * @param unit The desired dimension unit.
2165     * @param size The desired size in the given units.
2166     *
2167     * @attr ref android.R.styleable#TextView_textSize
2168     */
2169    public void setTextSize(int unit, float size) {
2170        Context c = getContext();
2171        Resources r;
2172
2173        if (c == null)
2174            r = Resources.getSystem();
2175        else
2176            r = c.getResources();
2177
2178        setRawTextSize(TypedValue.applyDimension(
2179            unit, size, r.getDisplayMetrics()));
2180    }
2181
2182    private void setRawTextSize(float size) {
2183        if (size != mTextPaint.getTextSize()) {
2184            mTextPaint.setTextSize(size);
2185
2186            if (mLayout != null) {
2187                nullLayouts();
2188                requestLayout();
2189                invalidate();
2190            }
2191        }
2192    }
2193
2194    /**
2195     * @return the extent by which text is currently being stretched
2196     * horizontally.  This will usually be 1.
2197     */
2198    public float getTextScaleX() {
2199        return mTextPaint.getTextScaleX();
2200    }
2201
2202    /**
2203     * Sets the extent by which text should be stretched horizontally.
2204     *
2205     * @attr ref android.R.styleable#TextView_textScaleX
2206     */
2207    @android.view.RemotableViewMethod
2208    public void setTextScaleX(float size) {
2209        if (size != mTextPaint.getTextScaleX()) {
2210            mUserSetTextScaleX = true;
2211            mTextPaint.setTextScaleX(size);
2212
2213            if (mLayout != null) {
2214                nullLayouts();
2215                requestLayout();
2216                invalidate();
2217            }
2218        }
2219    }
2220
2221    /**
2222     * Sets the typeface and style in which the text should be displayed.
2223     * Note that not all Typeface families actually have bold and italic
2224     * variants, so you may need to use
2225     * {@link #setTypeface(Typeface, int)} to get the appearance
2226     * that you actually want.
2227     *
2228     * @attr ref android.R.styleable#TextView_typeface
2229     * @attr ref android.R.styleable#TextView_textStyle
2230     */
2231    public void setTypeface(Typeface tf) {
2232        if (mTextPaint.getTypeface() != tf) {
2233            mTextPaint.setTypeface(tf);
2234
2235            if (mLayout != null) {
2236                nullLayouts();
2237                requestLayout();
2238                invalidate();
2239            }
2240        }
2241    }
2242
2243    /**
2244     * @return the current typeface and style in which the text is being
2245     * displayed.
2246     */
2247    public Typeface getTypeface() {
2248        return mTextPaint.getTypeface();
2249    }
2250
2251    /**
2252     * Sets the text color for all the states (normal, selected,
2253     * focused) to be this color.
2254     *
2255     * @attr ref android.R.styleable#TextView_textColor
2256     */
2257    @android.view.RemotableViewMethod
2258    public void setTextColor(int color) {
2259        mTextColor = ColorStateList.valueOf(color);
2260        updateTextColors();
2261    }
2262
2263    /**
2264     * Sets the text color.
2265     *
2266     * @attr ref android.R.styleable#TextView_textColor
2267     */
2268    public void setTextColor(ColorStateList colors) {
2269        if (colors == null) {
2270            throw new NullPointerException();
2271        }
2272
2273        mTextColor = colors;
2274        updateTextColors();
2275    }
2276
2277    /**
2278     * Return the set of text colors.
2279     *
2280     * @return Returns the set of text colors.
2281     */
2282    public final ColorStateList getTextColors() {
2283        return mTextColor;
2284    }
2285
2286    /**
2287     * <p>Return the current color selected for normal text.</p>
2288     *
2289     * @return Returns the current text color.
2290     */
2291    public final int getCurrentTextColor() {
2292        return mCurTextColor;
2293    }
2294
2295    /**
2296     * Sets the color used to display the selection highlight.
2297     *
2298     * @attr ref android.R.styleable#TextView_textColorHighlight
2299     */
2300    @android.view.RemotableViewMethod
2301    public void setHighlightColor(int color) {
2302        if (mHighlightColor != color) {
2303            mHighlightColor = color;
2304            invalidate();
2305        }
2306    }
2307
2308    /**
2309     * Gives the text a shadow of the specified radius and color, the specified
2310     * distance from its normal position.
2311     *
2312     * @attr ref android.R.styleable#TextView_shadowColor
2313     * @attr ref android.R.styleable#TextView_shadowDx
2314     * @attr ref android.R.styleable#TextView_shadowDy
2315     * @attr ref android.R.styleable#TextView_shadowRadius
2316     */
2317    public void setShadowLayer(float radius, float dx, float dy, int color) {
2318        mTextPaint.setShadowLayer(radius, dx, dy, color);
2319
2320        mShadowRadius = radius;
2321        mShadowDx = dx;
2322        mShadowDy = dy;
2323
2324        invalidate();
2325    }
2326
2327    /**
2328     * @return the base paint used for the text.  Please use this only to
2329     * consult the Paint's properties and not to change them.
2330     */
2331    public TextPaint getPaint() {
2332        return mTextPaint;
2333    }
2334
2335    /**
2336     * Sets the autolink mask of the text.  See {@link
2337     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
2338     * possible values.
2339     *
2340     * @attr ref android.R.styleable#TextView_autoLink
2341     */
2342    @android.view.RemotableViewMethod
2343    public final void setAutoLinkMask(int mask) {
2344        mAutoLinkMask = mask;
2345    }
2346
2347    /**
2348     * Sets whether the movement method will automatically be set to
2349     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
2350     * set to nonzero and links are detected in {@link #setText}.
2351     * The default is true.
2352     *
2353     * @attr ref android.R.styleable#TextView_linksClickable
2354     */
2355    @android.view.RemotableViewMethod
2356    public final void setLinksClickable(boolean whether) {
2357        mLinksClickable = whether;
2358    }
2359
2360    /**
2361     * Returns whether the movement method will automatically be set to
2362     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
2363     * set to nonzero and links are detected in {@link #setText}.
2364     * The default is true.
2365     *
2366     * @attr ref android.R.styleable#TextView_linksClickable
2367     */
2368    public final boolean getLinksClickable() {
2369        return mLinksClickable;
2370    }
2371
2372    /**
2373     * Returns the list of URLSpans attached to the text
2374     * (by {@link Linkify} or otherwise) if any.  You can call
2375     * {@link URLSpan#getURL} on them to find where they link to
2376     * or use {@link Spanned#getSpanStart} and {@link Spanned#getSpanEnd}
2377     * to find the region of the text they are attached to.
2378     */
2379    public URLSpan[] getUrls() {
2380        if (mText instanceof Spanned) {
2381            return ((Spanned) mText).getSpans(0, mText.length(), URLSpan.class);
2382        } else {
2383            return new URLSpan[0];
2384        }
2385    }
2386
2387    /**
2388     * Sets the color of the hint text.
2389     *
2390     * @attr ref android.R.styleable#TextView_textColorHint
2391     */
2392    @android.view.RemotableViewMethod
2393    public final void setHintTextColor(int color) {
2394        mHintTextColor = ColorStateList.valueOf(color);
2395        updateTextColors();
2396    }
2397
2398    /**
2399     * Sets the color of the hint text.
2400     *
2401     * @attr ref android.R.styleable#TextView_textColorHint
2402     */
2403    public final void setHintTextColor(ColorStateList colors) {
2404        mHintTextColor = colors;
2405        updateTextColors();
2406    }
2407
2408    /**
2409     * <p>Return the color used to paint the hint text.</p>
2410     *
2411     * @return Returns the list of hint text colors.
2412     */
2413    public final ColorStateList getHintTextColors() {
2414        return mHintTextColor;
2415    }
2416
2417    /**
2418     * <p>Return the current color selected to paint the hint text.</p>
2419     *
2420     * @return Returns the current hint text color.
2421     */
2422    public final int getCurrentHintTextColor() {
2423        return mHintTextColor != null ? mCurHintTextColor : mCurTextColor;
2424    }
2425
2426    /**
2427     * Sets the color of links in the text.
2428     *
2429     * @attr ref android.R.styleable#TextView_textColorLink
2430     */
2431    @android.view.RemotableViewMethod
2432    public final void setLinkTextColor(int color) {
2433        mLinkTextColor = ColorStateList.valueOf(color);
2434        updateTextColors();
2435    }
2436
2437    /**
2438     * Sets the color of links in the text.
2439     *
2440     * @attr ref android.R.styleable#TextView_textColorLink
2441     */
2442    public final void setLinkTextColor(ColorStateList colors) {
2443        mLinkTextColor = colors;
2444        updateTextColors();
2445    }
2446
2447    /**
2448     * <p>Returns the color used to paint links in the text.</p>
2449     *
2450     * @return Returns the list of link text colors.
2451     */
2452    public final ColorStateList getLinkTextColors() {
2453        return mLinkTextColor;
2454    }
2455
2456    /**
2457     * Sets the horizontal alignment of the text and the
2458     * vertical gravity that will be used when there is extra space
2459     * in the TextView beyond what is required for the text itself.
2460     *
2461     * @see android.view.Gravity
2462     * @attr ref android.R.styleable#TextView_gravity
2463     */
2464    public void setGravity(int gravity) {
2465        if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) == 0) {
2466            gravity |= Gravity.START;
2467        }
2468        if ((gravity & Gravity.VERTICAL_GRAVITY_MASK) == 0) {
2469            gravity |= Gravity.TOP;
2470        }
2471
2472        boolean newLayout = false;
2473
2474        if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) !=
2475            (mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK)) {
2476            newLayout = true;
2477        }
2478
2479        if (gravity != mGravity) {
2480            invalidate();
2481        }
2482
2483        mGravity = gravity;
2484
2485        if (mLayout != null && newLayout) {
2486            // XXX this is heavy-handed because no actual content changes.
2487            int want = mLayout.getWidth();
2488            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
2489
2490            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
2491                          mRight - mLeft - getCompoundPaddingLeft() -
2492                          getCompoundPaddingRight(), true);
2493        }
2494    }
2495
2496    /**
2497     * Returns the horizontal and vertical alignment of this TextView.
2498     *
2499     * @see android.view.Gravity
2500     * @attr ref android.R.styleable#TextView_gravity
2501     */
2502    public int getGravity() {
2503        return mGravity;
2504    }
2505
2506    /**
2507     * @return the flags on the Paint being used to display the text.
2508     * @see Paint#getFlags
2509     */
2510    public int getPaintFlags() {
2511        return mTextPaint.getFlags();
2512    }
2513
2514    /**
2515     * Sets flags on the Paint being used to display the text and
2516     * reflows the text if they are different from the old flags.
2517     * @see Paint#setFlags
2518     */
2519    @android.view.RemotableViewMethod
2520    public void setPaintFlags(int flags) {
2521        if (mTextPaint.getFlags() != flags) {
2522            mTextPaint.setFlags(flags);
2523
2524            if (mLayout != null) {
2525                nullLayouts();
2526                requestLayout();
2527                invalidate();
2528            }
2529        }
2530    }
2531
2532    /**
2533     * Sets whether the text should be allowed to be wider than the
2534     * View is.  If false, it will be wrapped to the width of the View.
2535     *
2536     * @attr ref android.R.styleable#TextView_scrollHorizontally
2537     */
2538    public void setHorizontallyScrolling(boolean whether) {
2539        if (mHorizontallyScrolling != whether) {
2540            mHorizontallyScrolling = whether;
2541
2542            if (mLayout != null) {
2543                nullLayouts();
2544                requestLayout();
2545                invalidate();
2546            }
2547        }
2548    }
2549
2550    /**
2551     * Makes the TextView at least this many lines tall.
2552     *
2553     * Setting this value overrides any other (minimum) height setting. A single line TextView will
2554     * set this value to 1.
2555     *
2556     * @attr ref android.R.styleable#TextView_minLines
2557     */
2558    @android.view.RemotableViewMethod
2559    public void setMinLines(int minlines) {
2560        mMinimum = minlines;
2561        mMinMode = LINES;
2562
2563        requestLayout();
2564        invalidate();
2565    }
2566
2567    /**
2568     * Makes the TextView at least this many pixels tall.
2569     *
2570     * Setting this value overrides any other (minimum) number of lines setting.
2571     *
2572     * @attr ref android.R.styleable#TextView_minHeight
2573     */
2574    @android.view.RemotableViewMethod
2575    public void setMinHeight(int minHeight) {
2576        mMinimum = minHeight;
2577        mMinMode = PIXELS;
2578
2579        requestLayout();
2580        invalidate();
2581    }
2582
2583    /**
2584     * Makes the TextView at most this many lines tall.
2585     *
2586     * Setting this value overrides any other (maximum) height setting.
2587     *
2588     * @attr ref android.R.styleable#TextView_maxLines
2589     */
2590    @android.view.RemotableViewMethod
2591    public void setMaxLines(int maxlines) {
2592        mMaximum = maxlines;
2593        mMaxMode = LINES;
2594
2595        requestLayout();
2596        invalidate();
2597    }
2598
2599    /**
2600     * Makes the TextView at most this many pixels tall.  This option is mutually exclusive with the
2601     * {@link #setMaxLines(int)} method.
2602     *
2603     * Setting this value overrides any other (maximum) number of lines setting.
2604     *
2605     * @attr ref android.R.styleable#TextView_maxHeight
2606     */
2607    @android.view.RemotableViewMethod
2608    public void setMaxHeight(int maxHeight) {
2609        mMaximum = maxHeight;
2610        mMaxMode = PIXELS;
2611
2612        requestLayout();
2613        invalidate();
2614    }
2615
2616    /**
2617     * Makes the TextView exactly this many lines tall.
2618     *
2619     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2620     * height setting. A single line TextView will set this value to 1.
2621     *
2622     * @attr ref android.R.styleable#TextView_lines
2623     */
2624    @android.view.RemotableViewMethod
2625    public void setLines(int lines) {
2626        mMaximum = mMinimum = lines;
2627        mMaxMode = mMinMode = LINES;
2628
2629        requestLayout();
2630        invalidate();
2631    }
2632
2633    /**
2634     * Makes the TextView exactly this many pixels tall.
2635     * You could do the same thing by specifying this number in the
2636     * LayoutParams.
2637     *
2638     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2639     * height setting.
2640     *
2641     * @attr ref android.R.styleable#TextView_height
2642     */
2643    @android.view.RemotableViewMethod
2644    public void setHeight(int pixels) {
2645        mMaximum = mMinimum = pixels;
2646        mMaxMode = mMinMode = PIXELS;
2647
2648        requestLayout();
2649        invalidate();
2650    }
2651
2652    /**
2653     * Makes the TextView at least this many ems wide
2654     *
2655     * @attr ref android.R.styleable#TextView_minEms
2656     */
2657    @android.view.RemotableViewMethod
2658    public void setMinEms(int minems) {
2659        mMinWidth = minems;
2660        mMinWidthMode = EMS;
2661
2662        requestLayout();
2663        invalidate();
2664    }
2665
2666    /**
2667     * Makes the TextView at least this many pixels wide
2668     *
2669     * @attr ref android.R.styleable#TextView_minWidth
2670     */
2671    @android.view.RemotableViewMethod
2672    public void setMinWidth(int minpixels) {
2673        mMinWidth = minpixels;
2674        mMinWidthMode = PIXELS;
2675
2676        requestLayout();
2677        invalidate();
2678    }
2679
2680    /**
2681     * Makes the TextView at most this many ems wide
2682     *
2683     * @attr ref android.R.styleable#TextView_maxEms
2684     */
2685    @android.view.RemotableViewMethod
2686    public void setMaxEms(int maxems) {
2687        mMaxWidth = maxems;
2688        mMaxWidthMode = EMS;
2689
2690        requestLayout();
2691        invalidate();
2692    }
2693
2694    /**
2695     * Makes the TextView at most this many pixels wide
2696     *
2697     * @attr ref android.R.styleable#TextView_maxWidth
2698     */
2699    @android.view.RemotableViewMethod
2700    public void setMaxWidth(int maxpixels) {
2701        mMaxWidth = maxpixels;
2702        mMaxWidthMode = PIXELS;
2703
2704        requestLayout();
2705        invalidate();
2706    }
2707
2708    /**
2709     * Makes the TextView exactly this many ems wide
2710     *
2711     * @attr ref android.R.styleable#TextView_ems
2712     */
2713    @android.view.RemotableViewMethod
2714    public void setEms(int ems) {
2715        mMaxWidth = mMinWidth = ems;
2716        mMaxWidthMode = mMinWidthMode = EMS;
2717
2718        requestLayout();
2719        invalidate();
2720    }
2721
2722    /**
2723     * Makes the TextView exactly this many pixels wide.
2724     * You could do the same thing by specifying this number in the
2725     * LayoutParams.
2726     *
2727     * @attr ref android.R.styleable#TextView_width
2728     */
2729    @android.view.RemotableViewMethod
2730    public void setWidth(int pixels) {
2731        mMaxWidth = mMinWidth = pixels;
2732        mMaxWidthMode = mMinWidthMode = PIXELS;
2733
2734        requestLayout();
2735        invalidate();
2736    }
2737
2738
2739    /**
2740     * Sets line spacing for this TextView.  Each line will have its height
2741     * multiplied by <code>mult</code> and have <code>add</code> added to it.
2742     *
2743     * @attr ref android.R.styleable#TextView_lineSpacingExtra
2744     * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
2745     */
2746    public void setLineSpacing(float add, float mult) {
2747        if (mSpacingAdd != add || mSpacingMult != mult) {
2748            mSpacingAdd = add;
2749            mSpacingMult = mult;
2750
2751            if (mLayout != null) {
2752                nullLayouts();
2753                requestLayout();
2754                invalidate();
2755            }
2756        }
2757    }
2758
2759    /**
2760     * Convenience method: Append the specified text to the TextView's
2761     * display buffer, upgrading it to BufferType.EDITABLE if it was
2762     * not already editable.
2763     */
2764    public final void append(CharSequence text) {
2765        append(text, 0, text.length());
2766    }
2767
2768    /**
2769     * Convenience method: Append the specified text slice to the TextView's
2770     * display buffer, upgrading it to BufferType.EDITABLE if it was
2771     * not already editable.
2772     */
2773    public void append(CharSequence text, int start, int end) {
2774        if (!(mText instanceof Editable)) {
2775            setText(mText, BufferType.EDITABLE);
2776        }
2777
2778        ((Editable) mText).append(text, start, end);
2779    }
2780
2781    private void updateTextColors() {
2782        boolean inval = false;
2783        int color = mTextColor.getColorForState(getDrawableState(), 0);
2784        if (color != mCurTextColor) {
2785            mCurTextColor = color;
2786            inval = true;
2787        }
2788        if (mLinkTextColor != null) {
2789            color = mLinkTextColor.getColorForState(getDrawableState(), 0);
2790            if (color != mTextPaint.linkColor) {
2791                mTextPaint.linkColor = color;
2792                inval = true;
2793            }
2794        }
2795        if (mHintTextColor != null) {
2796            color = mHintTextColor.getColorForState(getDrawableState(), 0);
2797            if (color != mCurHintTextColor && mText.length() == 0) {
2798                mCurHintTextColor = color;
2799                inval = true;
2800            }
2801        }
2802        if (inval) {
2803            invalidate();
2804        }
2805    }
2806
2807    @Override
2808    protected void drawableStateChanged() {
2809        super.drawableStateChanged();
2810        if (mTextColor != null && mTextColor.isStateful()
2811                || (mHintTextColor != null && mHintTextColor.isStateful())
2812                || (mLinkTextColor != null && mLinkTextColor.isStateful())) {
2813            updateTextColors();
2814        }
2815
2816        final Drawables dr = mDrawables;
2817        if (dr != null) {
2818            int[] state = getDrawableState();
2819            if (dr.mDrawableTop != null && dr.mDrawableTop.isStateful()) {
2820                dr.mDrawableTop.setState(state);
2821            }
2822            if (dr.mDrawableBottom != null && dr.mDrawableBottom.isStateful()) {
2823                dr.mDrawableBottom.setState(state);
2824            }
2825            if (dr.mDrawableLeft != null && dr.mDrawableLeft.isStateful()) {
2826                dr.mDrawableLeft.setState(state);
2827            }
2828            if (dr.mDrawableRight != null && dr.mDrawableRight.isStateful()) {
2829                dr.mDrawableRight.setState(state);
2830            }
2831            if (dr.mDrawableStart != null && dr.mDrawableStart.isStateful()) {
2832                dr.mDrawableStart.setState(state);
2833            }
2834            if (dr.mDrawableEnd != null && dr.mDrawableEnd.isStateful()) {
2835                dr.mDrawableEnd.setState(state);
2836            }
2837        }
2838    }
2839
2840    /**
2841     * User interface state that is stored by TextView for implementing
2842     * {@link View#onSaveInstanceState}.
2843     */
2844    public static class SavedState extends BaseSavedState {
2845        int selStart;
2846        int selEnd;
2847        CharSequence text;
2848        boolean frozenWithFocus;
2849        CharSequence error;
2850
2851        SavedState(Parcelable superState) {
2852            super(superState);
2853        }
2854
2855        @Override
2856        public void writeToParcel(Parcel out, int flags) {
2857            super.writeToParcel(out, flags);
2858            out.writeInt(selStart);
2859            out.writeInt(selEnd);
2860            out.writeInt(frozenWithFocus ? 1 : 0);
2861            TextUtils.writeToParcel(text, out, flags);
2862
2863            if (error == null) {
2864                out.writeInt(0);
2865            } else {
2866                out.writeInt(1);
2867                TextUtils.writeToParcel(error, out, flags);
2868            }
2869        }
2870
2871        @Override
2872        public String toString() {
2873            String str = "TextView.SavedState{"
2874                    + Integer.toHexString(System.identityHashCode(this))
2875                    + " start=" + selStart + " end=" + selEnd;
2876            if (text != null) {
2877                str += " text=" + text;
2878            }
2879            return str + "}";
2880        }
2881
2882        @SuppressWarnings("hiding")
2883        public static final Parcelable.Creator<SavedState> CREATOR
2884                = new Parcelable.Creator<SavedState>() {
2885            public SavedState createFromParcel(Parcel in) {
2886                return new SavedState(in);
2887            }
2888
2889            public SavedState[] newArray(int size) {
2890                return new SavedState[size];
2891            }
2892        };
2893
2894        private SavedState(Parcel in) {
2895            super(in);
2896            selStart = in.readInt();
2897            selEnd = in.readInt();
2898            frozenWithFocus = (in.readInt() != 0);
2899            text = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2900
2901            if (in.readInt() != 0) {
2902                error = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2903            }
2904        }
2905    }
2906
2907    @Override
2908    public Parcelable onSaveInstanceState() {
2909        Parcelable superState = super.onSaveInstanceState();
2910
2911        // Save state if we are forced to
2912        boolean save = mFreezesText;
2913        int start = 0;
2914        int end = 0;
2915
2916        if (mText != null) {
2917            start = getSelectionStart();
2918            end = getSelectionEnd();
2919            if (start >= 0 || end >= 0) {
2920                // Or save state if there is a selection
2921                save = true;
2922            }
2923        }
2924
2925        if (save) {
2926            SavedState ss = new SavedState(superState);
2927            // XXX Should also save the current scroll position!
2928            ss.selStart = start;
2929            ss.selEnd = end;
2930
2931            if (mText instanceof Spanned) {
2932                /*
2933                 * Calling setText() strips off any ChangeWatchers;
2934                 * strip them now to avoid leaking references.
2935                 * But do it to a copy so that if there are any
2936                 * further changes to the text of this view, it
2937                 * won't get into an inconsistent state.
2938                 */
2939
2940                Spannable sp = new SpannableString(mText);
2941
2942                for (ChangeWatcher cw : sp.getSpans(0, sp.length(), ChangeWatcher.class)) {
2943                    sp.removeSpan(cw);
2944                }
2945
2946                SuggestionSpan[] suggestionSpans = sp.getSpans(0, sp.length(), SuggestionSpan.class);
2947                for (int i = 0; i < suggestionSpans.length; i++) {
2948                    int flags = suggestionSpans[i].getFlags();
2949                    if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0
2950                            && (flags & SuggestionSpan.FLAG_MISSPELLED) != 0) {
2951                        sp.removeSpan(suggestionSpans[i]);
2952                    }
2953                }
2954
2955                sp.removeSpan(mSuggestionRangeSpan);
2956
2957                ss.text = sp;
2958            } else {
2959                ss.text = mText.toString();
2960            }
2961
2962            if (isFocused() && start >= 0 && end >= 0) {
2963                ss.frozenWithFocus = true;
2964            }
2965
2966            ss.error = mError;
2967
2968            return ss;
2969        }
2970
2971        return superState;
2972    }
2973
2974    @Override
2975    public void onRestoreInstanceState(Parcelable state) {
2976        if (!(state instanceof SavedState)) {
2977            super.onRestoreInstanceState(state);
2978            return;
2979        }
2980
2981        SavedState ss = (SavedState)state;
2982        super.onRestoreInstanceState(ss.getSuperState());
2983
2984        // XXX restore buffer type too, as well as lots of other stuff
2985        if (ss.text != null) {
2986            setText(ss.text);
2987        }
2988
2989        if (ss.selStart >= 0 && ss.selEnd >= 0) {
2990            if (mText instanceof Spannable) {
2991                int len = mText.length();
2992
2993                if (ss.selStart > len || ss.selEnd > len) {
2994                    String restored = "";
2995
2996                    if (ss.text != null) {
2997                        restored = "(restored) ";
2998                    }
2999
3000                    Log.e(LOG_TAG, "Saved cursor position " + ss.selStart +
3001                          "/" + ss.selEnd + " out of range for " + restored +
3002                          "text " + mText);
3003                } else {
3004                    Selection.setSelection((Spannable) mText, ss.selStart,
3005                                           ss.selEnd);
3006
3007                    if (ss.frozenWithFocus) {
3008                        mFrozenWithFocus = true;
3009                    }
3010                }
3011            }
3012        }
3013
3014        if (ss.error != null) {
3015            final CharSequence error = ss.error;
3016            // Display the error later, after the first layout pass
3017            post(new Runnable() {
3018                public void run() {
3019                    setError(error);
3020                }
3021            });
3022        }
3023    }
3024
3025    /**
3026     * Control whether this text view saves its entire text contents when
3027     * freezing to an icicle, in addition to dynamic state such as cursor
3028     * position.  By default this is false, not saving the text.  Set to true
3029     * if the text in the text view is not being saved somewhere else in
3030     * persistent storage (such as in a content provider) so that if the
3031     * view is later thawed the user will not lose their data.
3032     *
3033     * @param freezesText Controls whether a frozen icicle should include the
3034     * entire text data: true to include it, false to not.
3035     *
3036     * @attr ref android.R.styleable#TextView_freezesText
3037     */
3038    @android.view.RemotableViewMethod
3039    public void setFreezesText(boolean freezesText) {
3040        mFreezesText = freezesText;
3041    }
3042
3043    /**
3044     * Return whether this text view is including its entire text contents
3045     * in frozen icicles.
3046     *
3047     * @return Returns true if text is included, false if it isn't.
3048     *
3049     * @see #setFreezesText
3050     */
3051    public boolean getFreezesText() {
3052        return mFreezesText;
3053    }
3054
3055    ///////////////////////////////////////////////////////////////////////////
3056
3057    /**
3058     * Sets the Factory used to create new Editables.
3059     */
3060    public final void setEditableFactory(Editable.Factory factory) {
3061        mEditableFactory = factory;
3062        setText(mText);
3063    }
3064
3065    /**
3066     * Sets the Factory used to create new Spannables.
3067     */
3068    public final void setSpannableFactory(Spannable.Factory factory) {
3069        mSpannableFactory = factory;
3070        setText(mText);
3071    }
3072
3073    /**
3074     * Sets the string value of the TextView. TextView <em>does not</em> accept
3075     * HTML-like formatting, which you can do with text strings in XML resource files.
3076     * To style your strings, attach android.text.style.* objects to a
3077     * {@link android.text.SpannableString SpannableString}, or see the
3078     * <a href="{@docRoot}guide/topics/resources/available-resources.html#stringresources">
3079     * Available Resource Types</a> documentation for an example of setting
3080     * formatted text in the XML resource file.
3081     *
3082     * @attr ref android.R.styleable#TextView_text
3083     */
3084    @android.view.RemotableViewMethod
3085    public final void setText(CharSequence text) {
3086        setText(text, mBufferType);
3087    }
3088
3089    /**
3090     * Like {@link #setText(CharSequence)},
3091     * except that the cursor position (if any) is retained in the new text.
3092     *
3093     * @param text The new text to place in the text view.
3094     *
3095     * @see #setText(CharSequence)
3096     */
3097    @android.view.RemotableViewMethod
3098    public final void setTextKeepState(CharSequence text) {
3099        setTextKeepState(text, mBufferType);
3100    }
3101
3102    /**
3103     * Sets the text that this TextView is to display (see
3104     * {@link #setText(CharSequence)}) and also sets whether it is stored
3105     * in a styleable/spannable buffer and whether it is editable.
3106     *
3107     * @attr ref android.R.styleable#TextView_text
3108     * @attr ref android.R.styleable#TextView_bufferType
3109     */
3110    public void setText(CharSequence text, BufferType type) {
3111        setText(text, type, true, 0);
3112
3113        if (mCharWrapper != null) {
3114            mCharWrapper.mChars = null;
3115        }
3116    }
3117
3118    private void setText(CharSequence text, BufferType type,
3119                         boolean notifyBefore, int oldlen) {
3120        if (text == null) {
3121            text = "";
3122        }
3123
3124        // If suggestions are not enabled, remove the suggestion spans from the text
3125        if (!isSuggestionsEnabled()) {
3126            text = removeSuggestionSpans(text);
3127        }
3128
3129        if (!mUserSetTextScaleX) mTextPaint.setTextScaleX(1.0f);
3130
3131        if (text instanceof Spanned &&
3132            ((Spanned) text).getSpanStart(TextUtils.TruncateAt.MARQUEE) >= 0) {
3133            if (ViewConfiguration.get(mContext).isFadingMarqueeEnabled()) {
3134                setHorizontalFadingEdgeEnabled(true);
3135                mMarqueeFadeMode = MARQUEE_FADE_NORMAL;
3136            } else {
3137                setHorizontalFadingEdgeEnabled(false);
3138                mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
3139            }
3140            setEllipsize(TextUtils.TruncateAt.MARQUEE);
3141        }
3142
3143        int n = mFilters.length;
3144        for (int i = 0; i < n; i++) {
3145            CharSequence out = mFilters[i].filter(text, 0, text.length(),
3146                                                  EMPTY_SPANNED, 0, 0);
3147            if (out != null) {
3148                text = out;
3149            }
3150        }
3151
3152        if (notifyBefore) {
3153            if (mText != null) {
3154                oldlen = mText.length();
3155                sendBeforeTextChanged(mText, 0, oldlen, text.length());
3156            } else {
3157                sendBeforeTextChanged("", 0, 0, text.length());
3158            }
3159        }
3160
3161        boolean needEditableForNotification = false;
3162        boolean startSpellCheck = false;
3163
3164        if (mListeners != null && mListeners.size() != 0) {
3165            needEditableForNotification = true;
3166        }
3167
3168        if (type == BufferType.EDITABLE || mInput != null || needEditableForNotification) {
3169            Editable t = mEditableFactory.newEditable(text);
3170            text = t;
3171            setFilters(t, mFilters);
3172            InputMethodManager imm = InputMethodManager.peekInstance();
3173            if (imm != null) imm.restartInput(this);
3174            startSpellCheck = true;
3175        } else if (type == BufferType.SPANNABLE || mMovement != null) {
3176            text = mSpannableFactory.newSpannable(text);
3177        } else if (!(text instanceof CharWrapper)) {
3178            text = TextUtils.stringOrSpannedString(text);
3179        }
3180
3181        if (mAutoLinkMask != 0) {
3182            Spannable s2;
3183
3184            if (type == BufferType.EDITABLE || text instanceof Spannable) {
3185                s2 = (Spannable) text;
3186            } else {
3187                s2 = mSpannableFactory.newSpannable(text);
3188            }
3189
3190            if (Linkify.addLinks(s2, mAutoLinkMask)) {
3191                text = s2;
3192                type = (type == BufferType.EDITABLE) ? BufferType.EDITABLE : BufferType.SPANNABLE;
3193
3194                /*
3195                 * We must go ahead and set the text before changing the
3196                 * movement method, because setMovementMethod() may call
3197                 * setText() again to try to upgrade the buffer type.
3198                 */
3199                mText = text;
3200
3201                // Do not change the movement method for text that support text selection as it
3202                // would prevent an arbitrary cursor displacement.
3203                if (mLinksClickable && !textCanBeSelected()) {
3204                    setMovementMethod(LinkMovementMethod.getInstance());
3205                }
3206            }
3207        }
3208
3209        mBufferType = type;
3210        mText = text;
3211
3212        if (mTransformation == null) {
3213            mTransformed = text;
3214        } else {
3215            mTransformed = mTransformation.getTransformation(text, this);
3216        }
3217
3218        final int textLength = text.length();
3219
3220        if (text instanceof Spannable && !mAllowTransformationLengthChange) {
3221            Spannable sp = (Spannable) text;
3222
3223            // Remove any ChangeWatchers that might have come
3224            // from other TextViews.
3225            final ChangeWatcher[] watchers = sp.getSpans(0, sp.length(), ChangeWatcher.class);
3226            final int count = watchers.length;
3227            for (int i = 0; i < count; i++)
3228                sp.removeSpan(watchers[i]);
3229
3230            if (mChangeWatcher == null)
3231                mChangeWatcher = new ChangeWatcher();
3232
3233            sp.setSpan(mChangeWatcher, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE |
3234                       (PRIORITY << Spanned.SPAN_PRIORITY_SHIFT));
3235
3236            if (mInput != null) {
3237                sp.setSpan(mInput, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
3238            }
3239
3240            if (mTransformation != null) {
3241                sp.setSpan(mTransformation, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
3242            }
3243
3244            if (mMovement != null) {
3245                mMovement.initialize(this, (Spannable) text);
3246
3247                /*
3248                 * Initializing the movement method will have set the
3249                 * selection, so reset mSelectionMoved to keep that from
3250                 * interfering with the normal on-focus selection-setting.
3251                 */
3252                mSelectionMoved = false;
3253            }
3254        }
3255
3256        if (mLayout != null) {
3257            checkForRelayout();
3258        }
3259
3260        sendOnTextChanged(text, 0, oldlen, textLength);
3261        onTextChanged(text, 0, oldlen, textLength);
3262
3263        if (startSpellCheck && mSpellChecker != null) {
3264            // This view has to have been previously attached for mSpellChecker to exist
3265            updateSpellCheckSpans(0, textLength);
3266        }
3267
3268        if (needEditableForNotification) {
3269            sendAfterTextChanged((Editable) text);
3270        }
3271
3272        // SelectionModifierCursorController depends on textCanBeSelected, which depends on text
3273        prepareCursorControllers();
3274    }
3275
3276    /**
3277     * Sets the TextView to display the specified slice of the specified
3278     * char array.  You must promise that you will not change the contents
3279     * of the array except for right before another call to setText(),
3280     * since the TextView has no way to know that the text
3281     * has changed and that it needs to invalidate and re-layout.
3282     */
3283    public final void setText(char[] text, int start, int len) {
3284        int oldlen = 0;
3285
3286        if (start < 0 || len < 0 || start + len > text.length) {
3287            throw new IndexOutOfBoundsException(start + ", " + len);
3288        }
3289
3290        /*
3291         * We must do the before-notification here ourselves because if
3292         * the old text is a CharWrapper we destroy it before calling
3293         * into the normal path.
3294         */
3295        if (mText != null) {
3296            oldlen = mText.length();
3297            sendBeforeTextChanged(mText, 0, oldlen, len);
3298        } else {
3299            sendBeforeTextChanged("", 0, 0, len);
3300        }
3301
3302        if (mCharWrapper == null) {
3303            mCharWrapper = new CharWrapper(text, start, len);
3304        } else {
3305            mCharWrapper.set(text, start, len);
3306        }
3307
3308        setText(mCharWrapper, mBufferType, false, oldlen);
3309    }
3310
3311    private static class CharWrapper implements CharSequence, GetChars, GraphicsOperations {
3312        private char[] mChars;
3313        private int mStart, mLength;
3314
3315        public CharWrapper(char[] chars, int start, int len) {
3316            mChars = chars;
3317            mStart = start;
3318            mLength = len;
3319        }
3320
3321        /* package */ void set(char[] chars, int start, int len) {
3322            mChars = chars;
3323            mStart = start;
3324            mLength = len;
3325        }
3326
3327        public int length() {
3328            return mLength;
3329        }
3330
3331        public char charAt(int off) {
3332            return mChars[off + mStart];
3333        }
3334
3335        @Override
3336        public String toString() {
3337            return new String(mChars, mStart, mLength);
3338        }
3339
3340        public CharSequence subSequence(int start, int end) {
3341            if (start < 0 || end < 0 || start > mLength || end > mLength) {
3342                throw new IndexOutOfBoundsException(start + ", " + end);
3343            }
3344
3345            return new String(mChars, start + mStart, end - start);
3346        }
3347
3348        public void getChars(int start, int end, char[] buf, int off) {
3349            if (start < 0 || end < 0 || start > mLength || end > mLength) {
3350                throw new IndexOutOfBoundsException(start + ", " + end);
3351            }
3352
3353            System.arraycopy(mChars, start + mStart, buf, off, end - start);
3354        }
3355
3356        public void drawText(Canvas c, int start, int end,
3357                             float x, float y, Paint p) {
3358            c.drawText(mChars, start + mStart, end - start, x, y, p);
3359        }
3360
3361        public void drawTextRun(Canvas c, int start, int end,
3362                int contextStart, int contextEnd, float x, float y, int flags, Paint p) {
3363            int count = end - start;
3364            int contextCount = contextEnd - contextStart;
3365            c.drawTextRun(mChars, start + mStart, count, contextStart + mStart,
3366                    contextCount, x, y, flags, p);
3367        }
3368
3369        public float measureText(int start, int end, Paint p) {
3370            return p.measureText(mChars, start + mStart, end - start);
3371        }
3372
3373        public int getTextWidths(int start, int end, float[] widths, Paint p) {
3374            return p.getTextWidths(mChars, start + mStart, end - start, widths);
3375        }
3376
3377        public float getTextRunAdvances(int start, int end, int contextStart,
3378                int contextEnd, int flags, float[] advances, int advancesIndex,
3379                Paint p) {
3380            int count = end - start;
3381            int contextCount = contextEnd - contextStart;
3382            return p.getTextRunAdvances(mChars, start + mStart, count,
3383                    contextStart + mStart, contextCount, flags, advances,
3384                    advancesIndex);
3385        }
3386
3387        public float getTextRunAdvances(int start, int end, int contextStart,
3388                int contextEnd, int flags, float[] advances, int advancesIndex,
3389                Paint p, int reserved) {
3390            int count = end - start;
3391            int contextCount = contextEnd - contextStart;
3392            return p.getTextRunAdvances(mChars, start + mStart, count,
3393                    contextStart + mStart, contextCount, flags, advances,
3394                    advancesIndex, reserved);
3395        }
3396
3397        public int getTextRunCursor(int contextStart, int contextEnd, int flags,
3398                int offset, int cursorOpt, Paint p) {
3399            int contextCount = contextEnd - contextStart;
3400            return p.getTextRunCursor(mChars, contextStart + mStart,
3401                    contextCount, flags, offset + mStart, cursorOpt);
3402        }
3403    }
3404
3405    /**
3406     * Like {@link #setText(CharSequence, android.widget.TextView.BufferType)},
3407     * except that the cursor position (if any) is retained in the new text.
3408     *
3409     * @see #setText(CharSequence, android.widget.TextView.BufferType)
3410     */
3411    public final void setTextKeepState(CharSequence text, BufferType type) {
3412        int start = getSelectionStart();
3413        int end = getSelectionEnd();
3414        int len = text.length();
3415
3416        setText(text, type);
3417
3418        if (start >= 0 || end >= 0) {
3419            if (mText instanceof Spannable) {
3420                Selection.setSelection((Spannable) mText,
3421                                       Math.max(0, Math.min(start, len)),
3422                                       Math.max(0, Math.min(end, len)));
3423            }
3424        }
3425    }
3426
3427    @android.view.RemotableViewMethod
3428    public final void setText(int resid) {
3429        setText(getContext().getResources().getText(resid));
3430    }
3431
3432    public final void setText(int resid, BufferType type) {
3433        setText(getContext().getResources().getText(resid), type);
3434    }
3435
3436    /**
3437     * Sets the text to be displayed when the text of the TextView is empty.
3438     * Null means to use the normal empty text. The hint does not currently
3439     * participate in determining the size of the view.
3440     *
3441     * @attr ref android.R.styleable#TextView_hint
3442     */
3443    @android.view.RemotableViewMethod
3444    public final void setHint(CharSequence hint) {
3445        mHint = TextUtils.stringOrSpannedString(hint);
3446
3447        if (mLayout != null) {
3448            checkForRelayout();
3449        }
3450
3451        if (mText.length() == 0) {
3452            invalidate();
3453        }
3454    }
3455
3456    /**
3457     * Sets the text to be displayed when the text of the TextView is empty,
3458     * from a resource.
3459     *
3460     * @attr ref android.R.styleable#TextView_hint
3461     */
3462    @android.view.RemotableViewMethod
3463    public final void setHint(int resid) {
3464        setHint(getContext().getResources().getText(resid));
3465    }
3466
3467    /**
3468     * Returns the hint that is displayed when the text of the TextView
3469     * is empty.
3470     *
3471     * @attr ref android.R.styleable#TextView_hint
3472     */
3473    @ViewDebug.CapturedViewProperty
3474    public CharSequence getHint() {
3475        return mHint;
3476    }
3477
3478    private static boolean isMultilineInputType(int type) {
3479        return (type & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE)) ==
3480            (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE);
3481    }
3482
3483    /**
3484     * Set the type of the content with a constant as defined for {@link EditorInfo#inputType}. This
3485     * will take care of changing the key listener, by calling {@link #setKeyListener(KeyListener)},
3486     * to match the given content type.  If the given content type is {@link EditorInfo#TYPE_NULL}
3487     * then a soft keyboard will not be displayed for this text view.
3488     *
3489     * Note that the maximum number of displayed lines (see {@link #setMaxLines(int)}) will be
3490     * modified if you change the {@link EditorInfo#TYPE_TEXT_FLAG_MULTI_LINE} flag of the input
3491     * type.
3492     *
3493     * @see #getInputType()
3494     * @see #setRawInputType(int)
3495     * @see android.text.InputType
3496     * @attr ref android.R.styleable#TextView_inputType
3497     */
3498    public void setInputType(int type) {
3499        final boolean wasPassword = isPasswordInputType(mInputType);
3500        final boolean wasVisiblePassword = isVisiblePasswordInputType(mInputType);
3501        setInputType(type, false);
3502        final boolean isPassword = isPasswordInputType(type);
3503        final boolean isVisiblePassword = isVisiblePasswordInputType(type);
3504        boolean forceUpdate = false;
3505        if (isPassword) {
3506            setTransformationMethod(PasswordTransformationMethod.getInstance());
3507            setTypefaceByIndex(MONOSPACE, 0);
3508        } else if (isVisiblePassword) {
3509            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3510                forceUpdate = true;
3511            }
3512            setTypefaceByIndex(MONOSPACE, 0);
3513        } else if (wasPassword || wasVisiblePassword) {
3514            // not in password mode, clean up typeface and transformation
3515            setTypefaceByIndex(-1, -1);
3516            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3517                forceUpdate = true;
3518            }
3519        }
3520
3521        boolean singleLine = !isMultilineInputType(type);
3522
3523        // We need to update the single line mode if it has changed or we
3524        // were previously in password mode.
3525        if (mSingleLine != singleLine || forceUpdate) {
3526            // Change single line mode, but only change the transformation if
3527            // we are not in password mode.
3528            applySingleLine(singleLine, !isPassword, true);
3529        }
3530
3531        if (!isSuggestionsEnabled()) {
3532            mText = removeSuggestionSpans(mText);
3533        }
3534
3535        InputMethodManager imm = InputMethodManager.peekInstance();
3536        if (imm != null) imm.restartInput(this);
3537    }
3538
3539    /**
3540     * It would be better to rely on the input type for everything. A password inputType should have
3541     * a password transformation. We should hence use isPasswordInputType instead of this method.
3542     *
3543     * We should:
3544     * - Call setInputType in setKeyListener instead of changing the input type directly (which
3545     * would install the correct transformation).
3546     * - Refuse the installation of a non-password transformation in setTransformation if the input
3547     * type is password.
3548     *
3549     * However, this is like this for legacy reasons and we cannot break existing apps. This method
3550     * is useful since it matches what the user can see (obfuscated text or not).
3551     *
3552     * @return true if the current transformation method is of the password type.
3553     */
3554    private boolean hasPasswordTransformationMethod() {
3555        return mTransformation instanceof PasswordTransformationMethod;
3556    }
3557
3558    private static boolean isPasswordInputType(int inputType) {
3559        final int variation =
3560                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3561        return variation
3562                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)
3563                || variation
3564                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD)
3565                || variation
3566                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
3567    }
3568
3569    private static boolean isVisiblePasswordInputType(int inputType) {
3570        final int variation =
3571                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3572        return variation
3573                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
3574    }
3575
3576    /**
3577     * Directly change the content type integer of the text view, without
3578     * modifying any other state.
3579     * @see #setInputType(int)
3580     * @see android.text.InputType
3581     * @attr ref android.R.styleable#TextView_inputType
3582     */
3583    public void setRawInputType(int type) {
3584        mInputType = type;
3585    }
3586
3587    private void setInputType(int type, boolean direct) {
3588        final int cls = type & EditorInfo.TYPE_MASK_CLASS;
3589        KeyListener input;
3590        if (cls == EditorInfo.TYPE_CLASS_TEXT) {
3591            boolean autotext = (type & EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT) != 0;
3592            TextKeyListener.Capitalize cap;
3593            if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS) != 0) {
3594                cap = TextKeyListener.Capitalize.CHARACTERS;
3595            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS) != 0) {
3596                cap = TextKeyListener.Capitalize.WORDS;
3597            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES) != 0) {
3598                cap = TextKeyListener.Capitalize.SENTENCES;
3599            } else {
3600                cap = TextKeyListener.Capitalize.NONE;
3601            }
3602            input = TextKeyListener.getInstance(autotext, cap);
3603        } else if (cls == EditorInfo.TYPE_CLASS_NUMBER) {
3604            input = DigitsKeyListener.getInstance(
3605                    (type & EditorInfo.TYPE_NUMBER_FLAG_SIGNED) != 0,
3606                    (type & EditorInfo.TYPE_NUMBER_FLAG_DECIMAL) != 0);
3607        } else if (cls == EditorInfo.TYPE_CLASS_DATETIME) {
3608            switch (type & EditorInfo.TYPE_MASK_VARIATION) {
3609                case EditorInfo.TYPE_DATETIME_VARIATION_DATE:
3610                    input = DateKeyListener.getInstance();
3611                    break;
3612                case EditorInfo.TYPE_DATETIME_VARIATION_TIME:
3613                    input = TimeKeyListener.getInstance();
3614                    break;
3615                default:
3616                    input = DateTimeKeyListener.getInstance();
3617                    break;
3618            }
3619        } else if (cls == EditorInfo.TYPE_CLASS_PHONE) {
3620            input = DialerKeyListener.getInstance();
3621        } else {
3622            input = TextKeyListener.getInstance();
3623        }
3624        setRawInputType(type);
3625        if (direct) mInput = input;
3626        else {
3627            setKeyListenerOnly(input);
3628        }
3629    }
3630
3631    /**
3632     * Get the type of the content.
3633     *
3634     * @see #setInputType(int)
3635     * @see android.text.InputType
3636     */
3637    public int getInputType() {
3638        return mInputType;
3639    }
3640
3641    /**
3642     * Change the editor type integer associated with the text view, which
3643     * will be reported to an IME with {@link EditorInfo#imeOptions} when it
3644     * has focus.
3645     * @see #getImeOptions
3646     * @see android.view.inputmethod.EditorInfo
3647     * @attr ref android.R.styleable#TextView_imeOptions
3648     */
3649    public void setImeOptions(int imeOptions) {
3650        if (mInputContentType == null) {
3651            mInputContentType = new InputContentType();
3652        }
3653        mInputContentType.imeOptions = imeOptions;
3654    }
3655
3656    /**
3657     * Get the type of the IME editor.
3658     *
3659     * @see #setImeOptions(int)
3660     * @see android.view.inputmethod.EditorInfo
3661     */
3662    public int getImeOptions() {
3663        return mInputContentType != null
3664                ? mInputContentType.imeOptions : EditorInfo.IME_NULL;
3665    }
3666
3667    /**
3668     * Change the custom IME action associated with the text view, which
3669     * will be reported to an IME with {@link EditorInfo#actionLabel}
3670     * and {@link EditorInfo#actionId} when it has focus.
3671     * @see #getImeActionLabel
3672     * @see #getImeActionId
3673     * @see android.view.inputmethod.EditorInfo
3674     * @attr ref android.R.styleable#TextView_imeActionLabel
3675     * @attr ref android.R.styleable#TextView_imeActionId
3676     */
3677    public void setImeActionLabel(CharSequence label, int actionId) {
3678        if (mInputContentType == null) {
3679            mInputContentType = new InputContentType();
3680        }
3681        mInputContentType.imeActionLabel = label;
3682        mInputContentType.imeActionId = actionId;
3683    }
3684
3685    /**
3686     * Get the IME action label previous set with {@link #setImeActionLabel}.
3687     *
3688     * @see #setImeActionLabel
3689     * @see android.view.inputmethod.EditorInfo
3690     */
3691    public CharSequence getImeActionLabel() {
3692        return mInputContentType != null
3693                ? mInputContentType.imeActionLabel : null;
3694    }
3695
3696    /**
3697     * Get the IME action ID previous set with {@link #setImeActionLabel}.
3698     *
3699     * @see #setImeActionLabel
3700     * @see android.view.inputmethod.EditorInfo
3701     */
3702    public int getImeActionId() {
3703        return mInputContentType != null
3704                ? mInputContentType.imeActionId : 0;
3705    }
3706
3707    /**
3708     * Set a special listener to be called when an action is performed
3709     * on the text view.  This will be called when the enter key is pressed,
3710     * or when an action supplied to the IME is selected by the user.  Setting
3711     * this means that the normal hard key event will not insert a newline
3712     * into the text view, even if it is multi-line; holding down the ALT
3713     * modifier will, however, allow the user to insert a newline character.
3714     */
3715    public void setOnEditorActionListener(OnEditorActionListener l) {
3716        if (mInputContentType == null) {
3717            mInputContentType = new InputContentType();
3718        }
3719        mInputContentType.onEditorActionListener = l;
3720    }
3721
3722    /**
3723     * Called when an attached input method calls
3724     * {@link InputConnection#performEditorAction(int)
3725     * InputConnection.performEditorAction()}
3726     * for this text view.  The default implementation will call your action
3727     * listener supplied to {@link #setOnEditorActionListener}, or perform
3728     * a standard operation for {@link EditorInfo#IME_ACTION_NEXT
3729     * EditorInfo.IME_ACTION_NEXT}, {@link EditorInfo#IME_ACTION_PREVIOUS
3730     * EditorInfo.IME_ACTION_PREVIOUS}, or {@link EditorInfo#IME_ACTION_DONE
3731     * EditorInfo.IME_ACTION_DONE}.
3732     *
3733     * <p>For backwards compatibility, if no IME options have been set and the
3734     * text view would not normally advance focus on enter, then
3735     * the NEXT and DONE actions received here will be turned into an enter
3736     * key down/up pair to go through the normal key handling.
3737     *
3738     * @param actionCode The code of the action being performed.
3739     *
3740     * @see #setOnEditorActionListener
3741     */
3742    public void onEditorAction(int actionCode) {
3743        final InputContentType ict = mInputContentType;
3744        if (ict != null) {
3745            if (ict.onEditorActionListener != null) {
3746                if (ict.onEditorActionListener.onEditorAction(this,
3747                        actionCode, null)) {
3748                    return;
3749                }
3750            }
3751
3752            // This is the handling for some default action.
3753            // Note that for backwards compatibility we don't do this
3754            // default handling if explicit ime options have not been given,
3755            // instead turning this into the normal enter key codes that an
3756            // app may be expecting.
3757            if (actionCode == EditorInfo.IME_ACTION_NEXT) {
3758                View v = focusSearch(FOCUS_FORWARD);
3759                if (v != null) {
3760                    if (!v.requestFocus(FOCUS_FORWARD)) {
3761                        throw new IllegalStateException("focus search returned a view " +
3762                                "that wasn't able to take focus!");
3763                    }
3764                }
3765                return;
3766
3767            } else if (actionCode == EditorInfo.IME_ACTION_PREVIOUS) {
3768                View v = focusSearch(FOCUS_BACKWARD);
3769                if (v != null) {
3770                    if (!v.requestFocus(FOCUS_BACKWARD)) {
3771                        throw new IllegalStateException("focus search returned a view " +
3772                                "that wasn't able to take focus!");
3773                    }
3774                }
3775                return;
3776
3777            } else if (actionCode == EditorInfo.IME_ACTION_DONE) {
3778                InputMethodManager imm = InputMethodManager.peekInstance();
3779                if (imm != null && imm.isActive(this)) {
3780                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
3781                }
3782                clearFocus();
3783                return;
3784            }
3785        }
3786
3787        Handler h = getHandler();
3788        if (h != null) {
3789            long eventTime = SystemClock.uptimeMillis();
3790            h.sendMessage(h.obtainMessage(ViewRootImpl.DISPATCH_KEY_FROM_IME,
3791                    new KeyEvent(eventTime, eventTime,
3792                    KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_ENTER, 0, 0,
3793                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3794                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3795                    | KeyEvent.FLAG_EDITOR_ACTION)));
3796            h.sendMessage(h.obtainMessage(ViewRootImpl.DISPATCH_KEY_FROM_IME,
3797                    new KeyEvent(SystemClock.uptimeMillis(), eventTime,
3798                    KeyEvent.ACTION_UP, KeyEvent.KEYCODE_ENTER, 0, 0,
3799                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3800                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3801                    | KeyEvent.FLAG_EDITOR_ACTION)));
3802        }
3803    }
3804
3805    /**
3806     * Set the private content type of the text, which is the
3807     * {@link EditorInfo#privateImeOptions EditorInfo.privateImeOptions}
3808     * field that will be filled in when creating an input connection.
3809     *
3810     * @see #getPrivateImeOptions()
3811     * @see EditorInfo#privateImeOptions
3812     * @attr ref android.R.styleable#TextView_privateImeOptions
3813     */
3814    public void setPrivateImeOptions(String type) {
3815        if (mInputContentType == null) mInputContentType = new InputContentType();
3816        mInputContentType.privateImeOptions = type;
3817    }
3818
3819    /**
3820     * Get the private type of the content.
3821     *
3822     * @see #setPrivateImeOptions(String)
3823     * @see EditorInfo#privateImeOptions
3824     */
3825    public String getPrivateImeOptions() {
3826        return mInputContentType != null
3827                ? mInputContentType.privateImeOptions : null;
3828    }
3829
3830    /**
3831     * Set the extra input data of the text, which is the
3832     * {@link EditorInfo#extras TextBoxAttribute.extras}
3833     * Bundle that will be filled in when creating an input connection.  The
3834     * given integer is the resource ID of an XML resource holding an
3835     * {@link android.R.styleable#InputExtras &lt;input-extras&gt;} XML tree.
3836     *
3837     * @see #getInputExtras(boolean)
3838     * @see EditorInfo#extras
3839     * @attr ref android.R.styleable#TextView_editorExtras
3840     */
3841    public void setInputExtras(int xmlResId)
3842            throws XmlPullParserException, IOException {
3843        XmlResourceParser parser = getResources().getXml(xmlResId);
3844        if (mInputContentType == null) mInputContentType = new InputContentType();
3845        mInputContentType.extras = new Bundle();
3846        getResources().parseBundleExtras(parser, mInputContentType.extras);
3847    }
3848
3849    /**
3850     * Retrieve the input extras currently associated with the text view, which
3851     * can be viewed as well as modified.
3852     *
3853     * @param create If true, the extras will be created if they don't already
3854     * exist.  Otherwise, null will be returned if none have been created.
3855     * @see #setInputExtras(int)
3856     * @see EditorInfo#extras
3857     * @attr ref android.R.styleable#TextView_editorExtras
3858     */
3859    public Bundle getInputExtras(boolean create) {
3860        if (mInputContentType == null) {
3861            if (!create) return null;
3862            mInputContentType = new InputContentType();
3863        }
3864        if (mInputContentType.extras == null) {
3865            if (!create) return null;
3866            mInputContentType.extras = new Bundle();
3867        }
3868        return mInputContentType.extras;
3869    }
3870
3871    /**
3872     * Returns the error message that was set to be displayed with
3873     * {@link #setError}, or <code>null</code> if no error was set
3874     * or if it the error was cleared by the widget after user input.
3875     */
3876    public CharSequence getError() {
3877        return mError;
3878    }
3879
3880    /**
3881     * Sets the right-hand compound drawable of the TextView to the "error"
3882     * icon and sets an error message that will be displayed in a popup when
3883     * the TextView has focus.  The icon and error message will be reset to
3884     * null when any key events cause changes to the TextView's text.  If the
3885     * <code>error</code> is <code>null</code>, the error message and icon
3886     * will be cleared.
3887     */
3888    @android.view.RemotableViewMethod
3889    public void setError(CharSequence error) {
3890        if (error == null) {
3891            setError(null, null);
3892        } else {
3893            Drawable dr = getContext().getResources().
3894                getDrawable(com.android.internal.R.drawable.indicator_input_error);
3895
3896            dr.setBounds(0, 0, dr.getIntrinsicWidth(), dr.getIntrinsicHeight());
3897            setError(error, dr);
3898        }
3899    }
3900
3901    /**
3902     * Sets the right-hand compound drawable of the TextView to the specified
3903     * icon and sets an error message that will be displayed in a popup when
3904     * the TextView has focus.  The icon and error message will be reset to
3905     * null when any key events cause changes to the TextView's text.  The
3906     * drawable must already have had {@link Drawable#setBounds} set on it.
3907     * If the <code>error</code> is <code>null</code>, the error message will
3908     * be cleared (and you should provide a <code>null</code> icon as well).
3909     */
3910    public void setError(CharSequence error, Drawable icon) {
3911        error = TextUtils.stringOrSpannedString(error);
3912
3913        mError = error;
3914        mErrorWasChanged = true;
3915        final Drawables dr = mDrawables;
3916        if (dr != null) {
3917            switch (getResolvedLayoutDirection()) {
3918                default:
3919                case LAYOUT_DIRECTION_LTR:
3920                    setCompoundDrawables(dr.mDrawableLeft, dr.mDrawableTop, icon,
3921                            dr.mDrawableBottom);
3922                    break;
3923                case LAYOUT_DIRECTION_RTL:
3924                    setCompoundDrawables(icon, dr.mDrawableTop, dr.mDrawableRight,
3925                            dr.mDrawableBottom);
3926                    break;
3927            }
3928        } else {
3929            setCompoundDrawables(null, null, icon, null);
3930        }
3931
3932        if (error == null) {
3933            if (mPopup != null) {
3934                if (mPopup.isShowing()) {
3935                    mPopup.dismiss();
3936                }
3937
3938                mPopup = null;
3939            }
3940        } else {
3941            if (isFocused()) {
3942                showError();
3943            }
3944        }
3945    }
3946
3947    private void showError() {
3948        if (getWindowToken() == null) {
3949            mShowErrorAfterAttach = true;
3950            return;
3951        }
3952
3953        if (mPopup == null) {
3954            LayoutInflater inflater = LayoutInflater.from(getContext());
3955            final TextView err = (TextView) inflater.inflate(
3956                    com.android.internal.R.layout.textview_hint, null);
3957
3958            final float scale = getResources().getDisplayMetrics().density;
3959            mPopup = new ErrorPopup(err, (int) (200 * scale + 0.5f), (int) (50 * scale + 0.5f));
3960            mPopup.setFocusable(false);
3961            // The user is entering text, so the input method is needed.  We
3962            // don't want the popup to be displayed on top of it.
3963            mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);
3964        }
3965
3966        TextView tv = (TextView) mPopup.getContentView();
3967        chooseSize(mPopup, mError, tv);
3968        tv.setText(mError);
3969
3970        mPopup.showAsDropDown(this, getErrorX(), getErrorY());
3971        mPopup.fixDirection(mPopup.isAboveAnchor());
3972    }
3973
3974    private static class ErrorPopup extends PopupWindow {
3975        private boolean mAbove = false;
3976        private final TextView mView;
3977        private int mPopupInlineErrorBackgroundId = 0;
3978        private int mPopupInlineErrorAboveBackgroundId = 0;
3979
3980        ErrorPopup(TextView v, int width, int height) {
3981            super(v, width, height);
3982            mView = v;
3983            // Make sure the TextView has a background set as it will be used the first time it is
3984            // shown and positionned. Initialized with below background, which should have
3985            // dimensions identical to the above version for this to work (and is more likely).
3986            mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
3987                    com.android.internal.R.styleable.Theme_errorMessageBackground);
3988            mView.setBackgroundResource(mPopupInlineErrorBackgroundId);
3989        }
3990
3991        void fixDirection(boolean above) {
3992            mAbove = above;
3993
3994            if (above) {
3995                mPopupInlineErrorAboveBackgroundId =
3996                    getResourceId(mPopupInlineErrorAboveBackgroundId,
3997                            com.android.internal.R.styleable.Theme_errorMessageAboveBackground);
3998            } else {
3999                mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
4000                        com.android.internal.R.styleable.Theme_errorMessageBackground);
4001            }
4002
4003            mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId :
4004                mPopupInlineErrorBackgroundId);
4005        }
4006
4007        private int getResourceId(int currentId, int index) {
4008            if (currentId == 0) {
4009                TypedArray styledAttributes = mView.getContext().obtainStyledAttributes(
4010                        R.styleable.Theme);
4011                currentId = styledAttributes.getResourceId(index, 0);
4012                styledAttributes.recycle();
4013            }
4014            return currentId;
4015        }
4016
4017        @Override
4018        public void update(int x, int y, int w, int h, boolean force) {
4019            super.update(x, y, w, h, force);
4020
4021            boolean above = isAboveAnchor();
4022            if (above != mAbove) {
4023                fixDirection(above);
4024            }
4025        }
4026    }
4027
4028    /**
4029     * Returns the Y offset to make the pointy top of the error point
4030     * at the middle of the error icon.
4031     */
4032    private int getErrorX() {
4033        /*
4034         * The "25" is the distance between the point and the right edge
4035         * of the background
4036         */
4037        final float scale = getResources().getDisplayMetrics().density;
4038
4039        final Drawables dr = mDrawables;
4040        return getWidth() - mPopup.getWidth() - getPaddingRight() -
4041                (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f);
4042    }
4043
4044    /**
4045     * Returns the Y offset to make the pointy top of the error point
4046     * at the bottom of the error icon.
4047     */
4048    private int getErrorY() {
4049        /*
4050         * Compound, not extended, because the icon is not clipped
4051         * if the text height is smaller.
4052         */
4053        final int compoundPaddingTop = getCompoundPaddingTop();
4054        int vspace = mBottom - mTop - getCompoundPaddingBottom() - compoundPaddingTop;
4055
4056        final Drawables dr = mDrawables;
4057        int icontop = compoundPaddingTop +
4058                (vspace - (dr != null ? dr.mDrawableHeightRight : 0)) / 2;
4059
4060        /*
4061         * The "2" is the distance between the point and the top edge
4062         * of the background.
4063         */
4064        final float scale = getResources().getDisplayMetrics().density;
4065        return icontop + (dr != null ? dr.mDrawableHeightRight : 0) - getHeight() -
4066                (int) (2 * scale + 0.5f);
4067    }
4068
4069    private void hideError() {
4070        if (mPopup != null) {
4071            if (mPopup.isShowing()) {
4072                mPopup.dismiss();
4073            }
4074        }
4075
4076        mShowErrorAfterAttach = false;
4077    }
4078
4079    private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) {
4080        int wid = tv.getPaddingLeft() + tv.getPaddingRight();
4081        int ht = tv.getPaddingTop() + tv.getPaddingBottom();
4082
4083        int defaultWidthInPixels = getResources().getDimensionPixelSize(
4084                com.android.internal.R.dimen.textview_error_popup_default_width);
4085        Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels,
4086                                    Layout.Alignment.ALIGN_NORMAL, 1, 0, true);
4087        float max = 0;
4088        for (int i = 0; i < l.getLineCount(); i++) {
4089            max = Math.max(max, l.getLineWidth(i));
4090        }
4091
4092        /*
4093         * Now set the popup size to be big enough for the text plus the border capped
4094         * to DEFAULT_MAX_POPUP_WIDTH
4095         */
4096        pop.setWidth(wid + (int) Math.ceil(max));
4097        pop.setHeight(ht + l.getHeight());
4098    }
4099
4100
4101    @Override
4102    protected boolean setFrame(int l, int t, int r, int b) {
4103        boolean result = super.setFrame(l, t, r, b);
4104
4105        if (mPopup != null) {
4106            TextView tv = (TextView) mPopup.getContentView();
4107            chooseSize(mPopup, mError, tv);
4108            mPopup.update(this, getErrorX(), getErrorY(),
4109                          mPopup.getWidth(), mPopup.getHeight());
4110        }
4111
4112        restartMarqueeIfNeeded();
4113
4114        return result;
4115    }
4116
4117    private void restartMarqueeIfNeeded() {
4118        if (mRestartMarquee && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
4119            mRestartMarquee = false;
4120            startMarquee();
4121        }
4122    }
4123
4124    /**
4125     * Sets the list of input filters that will be used if the buffer is
4126     * Editable.  Has no effect otherwise.
4127     *
4128     * @attr ref android.R.styleable#TextView_maxLength
4129     */
4130    public void setFilters(InputFilter[] filters) {
4131        if (filters == null) {
4132            throw new IllegalArgumentException();
4133        }
4134
4135        mFilters = filters;
4136
4137        if (mText instanceof Editable) {
4138            setFilters((Editable) mText, filters);
4139        }
4140    }
4141
4142    /**
4143     * Sets the list of input filters on the specified Editable,
4144     * and includes mInput in the list if it is an InputFilter.
4145     */
4146    private void setFilters(Editable e, InputFilter[] filters) {
4147        if (mInput instanceof InputFilter) {
4148            InputFilter[] nf = new InputFilter[filters.length + 1];
4149
4150            System.arraycopy(filters, 0, nf, 0, filters.length);
4151            nf[filters.length] = (InputFilter) mInput;
4152
4153            e.setFilters(nf);
4154        } else {
4155            e.setFilters(filters);
4156        }
4157    }
4158
4159    /**
4160     * Returns the current list of input filters.
4161     */
4162    public InputFilter[] getFilters() {
4163        return mFilters;
4164    }
4165
4166    /////////////////////////////////////////////////////////////////////////
4167
4168    private int getVerticalOffset(boolean forceNormal) {
4169        int voffset = 0;
4170        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
4171
4172        Layout l = mLayout;
4173        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
4174            l = mHintLayout;
4175        }
4176
4177        if (gravity != Gravity.TOP) {
4178            int boxht;
4179
4180            if (l == mHintLayout) {
4181                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
4182                        getCompoundPaddingBottom();
4183            } else {
4184                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
4185                        getExtendedPaddingBottom();
4186            }
4187            int textht = l.getHeight();
4188
4189            if (textht < boxht) {
4190                if (gravity == Gravity.BOTTOM)
4191                    voffset = boxht - textht;
4192                else // (gravity == Gravity.CENTER_VERTICAL)
4193                    voffset = (boxht - textht) >> 1;
4194            }
4195        }
4196        return voffset;
4197    }
4198
4199    private int getBottomVerticalOffset(boolean forceNormal) {
4200        int voffset = 0;
4201        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
4202
4203        Layout l = mLayout;
4204        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
4205            l = mHintLayout;
4206        }
4207
4208        if (gravity != Gravity.BOTTOM) {
4209            int boxht;
4210
4211            if (l == mHintLayout) {
4212                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
4213                        getCompoundPaddingBottom();
4214            } else {
4215                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
4216                        getExtendedPaddingBottom();
4217            }
4218            int textht = l.getHeight();
4219
4220            if (textht < boxht) {
4221                if (gravity == Gravity.TOP)
4222                    voffset = boxht - textht;
4223                else // (gravity == Gravity.CENTER_VERTICAL)
4224                    voffset = (boxht - textht) >> 1;
4225            }
4226        }
4227        return voffset;
4228    }
4229
4230    private void invalidateCursorPath() {
4231        if (mHighlightPathBogus) {
4232            invalidateCursor();
4233        } else {
4234            final int horizontalPadding = getCompoundPaddingLeft();
4235            final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
4236
4237            if (mCursorCount == 0) {
4238                synchronized (sTempRect) {
4239                    /*
4240                     * The reason for this concern about the thickness of the
4241                     * cursor and doing the floor/ceil on the coordinates is that
4242                     * some EditTexts (notably textfields in the Browser) have
4243                     * anti-aliased text where not all the characters are
4244                     * necessarily at integer-multiple locations.  This should
4245                     * make sure the entire cursor gets invalidated instead of
4246                     * sometimes missing half a pixel.
4247                     */
4248                    float thick = FloatMath.ceil(mTextPaint.getStrokeWidth());
4249                    if (thick < 1.0f) {
4250                        thick = 1.0f;
4251                    }
4252
4253                    thick /= 2.0f;
4254
4255                    mHighlightPath.computeBounds(sTempRect, false);
4256
4257                    invalidate((int) FloatMath.floor(horizontalPadding + sTempRect.left - thick),
4258                            (int) FloatMath.floor(verticalPadding + sTempRect.top - thick),
4259                            (int) FloatMath.ceil(horizontalPadding + sTempRect.right + thick),
4260                            (int) FloatMath.ceil(verticalPadding + sTempRect.bottom + thick));
4261                }
4262            } else {
4263                for (int i = 0; i < mCursorCount; i++) {
4264                    Rect bounds = mCursorDrawable[i].getBounds();
4265                    invalidate(bounds.left + horizontalPadding, bounds.top + verticalPadding,
4266                            bounds.right + horizontalPadding, bounds.bottom + verticalPadding);
4267                }
4268            }
4269        }
4270    }
4271
4272    private void invalidateCursor() {
4273        int where = getSelectionEnd();
4274
4275        invalidateCursor(where, where, where);
4276    }
4277
4278    private void invalidateCursor(int a, int b, int c) {
4279        if (mLayout == null) {
4280            invalidate();
4281        } else {
4282            if (a >= 0 || b >= 0 || c >= 0) {
4283                int first = Math.min(Math.min(a, b), c);
4284                int last = Math.max(Math.max(a, b), c);
4285
4286                int line = mLayout.getLineForOffset(first);
4287                int top = mLayout.getLineTop(line);
4288
4289                // This is ridiculous, but the descent from the line above
4290                // can hang down into the line we really want to redraw,
4291                // so we have to invalidate part of the line above to make
4292                // sure everything that needs to be redrawn really is.
4293                // (But not the whole line above, because that would cause
4294                // the same problem with the descenders on the line above it!)
4295                if (line > 0) {
4296                    top -= mLayout.getLineDescent(line - 1);
4297                }
4298
4299                int line2;
4300
4301                if (first == last)
4302                    line2 = line;
4303                else
4304                    line2 = mLayout.getLineForOffset(last);
4305
4306                int bottom = mLayout.getLineTop(line2 + 1);
4307
4308                final int horizontalPadding = getCompoundPaddingLeft();
4309                final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
4310
4311                // If used, the cursor drawables can have an arbitrary dimension that can go beyond
4312                // the invalidated lines specified above.
4313                for (int i = 0; i < mCursorCount; i++) {
4314                    Rect bounds = mCursorDrawable[i].getBounds();
4315                    top = Math.min(top, bounds.top);
4316                    bottom = Math.max(bottom, bounds.bottom);
4317                    // Horizontal bounds are already full width, no need to update
4318                }
4319
4320                invalidate(horizontalPadding + mScrollX, top + verticalPadding,
4321                        horizontalPadding + mScrollX + getWidth() -
4322                        getCompoundPaddingLeft() - getCompoundPaddingRight(),
4323                        bottom + verticalPadding);
4324            }
4325        }
4326    }
4327
4328    private void registerForPreDraw() {
4329        final ViewTreeObserver observer = getViewTreeObserver();
4330
4331        if (mPreDrawState == PREDRAW_NOT_REGISTERED) {
4332            observer.addOnPreDrawListener(this);
4333            mPreDrawState = PREDRAW_PENDING;
4334        } else if (mPreDrawState == PREDRAW_DONE) {
4335            mPreDrawState = PREDRAW_PENDING;
4336        }
4337
4338        // else state is PREDRAW_PENDING, so keep waiting.
4339    }
4340
4341    /**
4342     * {@inheritDoc}
4343     */
4344    public boolean onPreDraw() {
4345        if (mPreDrawState != PREDRAW_PENDING) {
4346            return true;
4347        }
4348
4349        if (mLayout == null) {
4350            assumeLayout();
4351        }
4352
4353        boolean changed = false;
4354
4355        if (mMovement != null) {
4356            /* This code also provides auto-scrolling when a cursor is moved using a
4357             * CursorController (insertion point or selection limits).
4358             * For selection, ensure start or end is visible depending on controller's state.
4359             */
4360            int curs = getSelectionEnd();
4361            // Do not create the controller if it is not already created.
4362            if (mSelectionModifierCursorController != null &&
4363                    mSelectionModifierCursorController.isSelectionStartDragged()) {
4364                curs = getSelectionStart();
4365            }
4366
4367            /*
4368             * TODO: This should really only keep the end in view if
4369             * it already was before the text changed.  I'm not sure
4370             * of a good way to tell from here if it was.
4371             */
4372            if (curs < 0 &&
4373                  (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
4374                curs = mText.length();
4375            }
4376
4377            if (curs >= 0) {
4378                changed = bringPointIntoView(curs);
4379            }
4380        } else {
4381            changed = bringTextIntoView();
4382        }
4383
4384        // This has to be checked here since:
4385        // - onFocusChanged cannot start it when focus is given to a view with selected text (after
4386        //   a screen rotation) since layout is not yet initialized at that point.
4387        if (mCreatedWithASelection) {
4388            startSelectionActionMode();
4389            mCreatedWithASelection = false;
4390        }
4391
4392        // Phone specific code (there is no ExtractEditText on tablets).
4393        // ExtractEditText does not call onFocus when it is displayed, and mHasSelectionOnFocus can
4394        // not be set. Do the test here instead.
4395        if (this instanceof ExtractEditText && hasSelection()) {
4396            startSelectionActionMode();
4397        }
4398
4399        mPreDrawState = PREDRAW_DONE;
4400        return !changed;
4401    }
4402
4403    @Override
4404    protected void onAttachedToWindow() {
4405        super.onAttachedToWindow();
4406
4407        mTemporaryDetach = false;
4408
4409        if (mShowErrorAfterAttach) {
4410            showError();
4411            mShowErrorAfterAttach = false;
4412        }
4413
4414        final ViewTreeObserver observer = getViewTreeObserver();
4415        // No need to create the controller.
4416        // The get method will add the listener on controller creation.
4417        if (mInsertionPointCursorController != null) {
4418            observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
4419        }
4420        if (mSelectionModifierCursorController != null) {
4421            observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
4422        }
4423
4424        // Resolve drawables as the layout direction has been resolved
4425        resolveDrawables();
4426
4427        updateSpellCheckSpans(0, mText.length());
4428    }
4429
4430    @Override
4431    protected void onDetachedFromWindow() {
4432        super.onDetachedFromWindow();
4433
4434        final ViewTreeObserver observer = getViewTreeObserver();
4435        if (mPreDrawState != PREDRAW_NOT_REGISTERED) {
4436            observer.removeOnPreDrawListener(this);
4437            mPreDrawState = PREDRAW_NOT_REGISTERED;
4438        }
4439
4440        if (mError != null) {
4441            hideError();
4442        }
4443
4444        if (mBlink != null) {
4445            mBlink.removeCallbacks(mBlink);
4446        }
4447
4448        if (mInsertionPointCursorController != null) {
4449            mInsertionPointCursorController.onDetached();
4450        }
4451
4452        if (mSelectionModifierCursorController != null) {
4453            mSelectionModifierCursorController.onDetached();
4454        }
4455
4456        hideControllers();
4457
4458        resetResolvedDrawables();
4459
4460        if (mSpellChecker != null) {
4461            mSpellChecker.closeSession();
4462            // Forces the creation of a new SpellChecker next time this window is created.
4463            // Will handle the cases where the settings has been changed in the meantime.
4464            mSpellChecker = null;
4465        }
4466    }
4467
4468    @Override
4469    protected boolean isPaddingOffsetRequired() {
4470        return mShadowRadius != 0 || mDrawables != null;
4471    }
4472
4473    @Override
4474    protected int getLeftPaddingOffset() {
4475        return getCompoundPaddingLeft() - mPaddingLeft +
4476                (int) Math.min(0, mShadowDx - mShadowRadius);
4477    }
4478
4479    @Override
4480    protected int getTopPaddingOffset() {
4481        return (int) Math.min(0, mShadowDy - mShadowRadius);
4482    }
4483
4484    @Override
4485    protected int getBottomPaddingOffset() {
4486        return (int) Math.max(0, mShadowDy + mShadowRadius);
4487    }
4488
4489    @Override
4490    protected int getRightPaddingOffset() {
4491        return -(getCompoundPaddingRight() - mPaddingRight) +
4492                (int) Math.max(0, mShadowDx + mShadowRadius);
4493    }
4494
4495    @Override
4496    protected boolean verifyDrawable(Drawable who) {
4497        final boolean verified = super.verifyDrawable(who);
4498        if (!verified && mDrawables != null) {
4499            return who == mDrawables.mDrawableLeft || who == mDrawables.mDrawableTop ||
4500                    who == mDrawables.mDrawableRight || who == mDrawables.mDrawableBottom ||
4501                    who == mDrawables.mDrawableStart || who == mDrawables.mDrawableEnd;
4502        }
4503        return verified;
4504    }
4505
4506    @Override
4507    public void jumpDrawablesToCurrentState() {
4508        super.jumpDrawablesToCurrentState();
4509        if (mDrawables != null) {
4510            if (mDrawables.mDrawableLeft != null) {
4511                mDrawables.mDrawableLeft.jumpToCurrentState();
4512            }
4513            if (mDrawables.mDrawableTop != null) {
4514                mDrawables.mDrawableTop.jumpToCurrentState();
4515            }
4516            if (mDrawables.mDrawableRight != null) {
4517                mDrawables.mDrawableRight.jumpToCurrentState();
4518            }
4519            if (mDrawables.mDrawableBottom != null) {
4520                mDrawables.mDrawableBottom.jumpToCurrentState();
4521            }
4522            if (mDrawables.mDrawableStart != null) {
4523                mDrawables.mDrawableStart.jumpToCurrentState();
4524            }
4525            if (mDrawables.mDrawableEnd != null) {
4526                mDrawables.mDrawableEnd.jumpToCurrentState();
4527            }
4528        }
4529    }
4530
4531    @Override
4532    public void invalidateDrawable(Drawable drawable) {
4533        if (verifyDrawable(drawable)) {
4534            final Rect dirty = drawable.getBounds();
4535            int scrollX = mScrollX;
4536            int scrollY = mScrollY;
4537
4538            // IMPORTANT: The coordinates below are based on the coordinates computed
4539            // for each compound drawable in onDraw(). Make sure to update each section
4540            // accordingly.
4541            final TextView.Drawables drawables = mDrawables;
4542            if (drawables != null) {
4543                if (drawable == drawables.mDrawableLeft) {
4544                    final int compoundPaddingTop = getCompoundPaddingTop();
4545                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4546                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4547
4548                    scrollX += mPaddingLeft;
4549                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightLeft) / 2;
4550                } else if (drawable == drawables.mDrawableRight) {
4551                    final int compoundPaddingTop = getCompoundPaddingTop();
4552                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4553                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4554
4555                    scrollX += (mRight - mLeft - mPaddingRight - drawables.mDrawableSizeRight);
4556                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightRight) / 2;
4557                } else if (drawable == drawables.mDrawableTop) {
4558                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4559                    final int compoundPaddingRight = getCompoundPaddingRight();
4560                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4561
4562                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthTop) / 2;
4563                    scrollY += mPaddingTop;
4564                } else if (drawable == drawables.mDrawableBottom) {
4565                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4566                    final int compoundPaddingRight = getCompoundPaddingRight();
4567                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4568
4569                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthBottom) / 2;
4570                    scrollY += (mBottom - mTop - mPaddingBottom - drawables.mDrawableSizeBottom);
4571                }
4572            }
4573
4574            invalidate(dirty.left + scrollX, dirty.top + scrollY,
4575                    dirty.right + scrollX, dirty.bottom + scrollY);
4576        }
4577    }
4578
4579    /**
4580     * @hide
4581     */
4582    @Override
4583    public int getResolvedLayoutDirection(Drawable who) {
4584        if (who == null) return View.LAYOUT_DIRECTION_LTR;
4585        if (mDrawables != null) {
4586            final Drawables drawables = mDrawables;
4587            if (who == drawables.mDrawableLeft || who == drawables.mDrawableRight ||
4588                who == drawables.mDrawableTop || who == drawables.mDrawableBottom ||
4589                who == drawables.mDrawableStart || who == drawables.mDrawableEnd) {
4590                return getResolvedLayoutDirection();
4591            }
4592        }
4593        return super.getResolvedLayoutDirection(who);
4594    }
4595
4596    @Override
4597    protected boolean onSetAlpha(int alpha) {
4598        // Alpha is supported if and only if the drawing can be done in one pass.
4599        // TODO text with spans with a background color currently do not respect this alpha.
4600        if (getBackground() == null) {
4601            mCurrentAlpha = alpha;
4602            final Drawables dr = mDrawables;
4603            if (dr != null) {
4604                if (dr.mDrawableLeft != null) dr.mDrawableLeft.mutate().setAlpha(alpha);
4605                if (dr.mDrawableTop != null) dr.mDrawableTop.mutate().setAlpha(alpha);
4606                if (dr.mDrawableRight != null) dr.mDrawableRight.mutate().setAlpha(alpha);
4607                if (dr.mDrawableBottom != null) dr.mDrawableBottom.mutate().setAlpha(alpha);
4608                if (dr.mDrawableStart != null) dr.mDrawableStart.mutate().setAlpha(alpha);
4609                if (dr.mDrawableEnd != null) dr.mDrawableEnd.mutate().setAlpha(alpha);
4610            }
4611            return true;
4612        }
4613
4614        mCurrentAlpha = 255;
4615        return false;
4616    }
4617
4618    /**
4619     * When a TextView is used to display a useful piece of information to the user (such as a
4620     * contact's address), it should be made selectable, so that the user can select and copy this
4621     * content.
4622     *
4623     * Use {@link #setTextIsSelectable(boolean)} or the
4624     * {@link android.R.styleable#TextView_textIsSelectable} XML attribute to make this TextView
4625     * selectable (text is not selectable by default).
4626     *
4627     * Note that this method simply returns the state of this flag. Although this flag has to be set
4628     * in order to select text in non-editable TextView, the content of an {@link EditText} can
4629     * always be selected, independently of the value of this flag.
4630     *
4631     * @return True if the text displayed in this TextView can be selected by the user.
4632     *
4633     * @attr ref android.R.styleable#TextView_textIsSelectable
4634     */
4635    public boolean isTextSelectable() {
4636        return mTextIsSelectable;
4637    }
4638
4639    /**
4640     * Sets whether or not (default) the content of this view is selectable by the user.
4641     *
4642     * Note that this methods affect the {@link #setFocusable(boolean)},
4643     * {@link #setFocusableInTouchMode(boolean)} {@link #setClickable(boolean)} and
4644     * {@link #setLongClickable(boolean)} states and you may want to restore these if they were
4645     * customized.
4646     *
4647     * See {@link #isTextSelectable} for details.
4648     *
4649     * @param selectable Whether or not the content of this TextView should be selectable.
4650     */
4651    public void setTextIsSelectable(boolean selectable) {
4652        if (mTextIsSelectable == selectable) return;
4653
4654        mTextIsSelectable = selectable;
4655
4656        setFocusableInTouchMode(selectable);
4657        setFocusable(selectable);
4658        setClickable(selectable);
4659        setLongClickable(selectable);
4660
4661        // mInputType is already EditorInfo.TYPE_NULL and mInput is null;
4662
4663        setMovementMethod(selectable ? ArrowKeyMovementMethod.getInstance() : null);
4664        setText(getText(), selectable ? BufferType.SPANNABLE : BufferType.NORMAL);
4665
4666        // Called by setText above, but safer in case of future code changes
4667        prepareCursorControllers();
4668    }
4669
4670    @Override
4671    protected int[] onCreateDrawableState(int extraSpace) {
4672        final int[] drawableState;
4673
4674        if (mSingleLine) {
4675            drawableState = super.onCreateDrawableState(extraSpace);
4676        } else {
4677            drawableState = super.onCreateDrawableState(extraSpace + 1);
4678            mergeDrawableStates(drawableState, MULTILINE_STATE_SET);
4679        }
4680
4681        if (mTextIsSelectable) {
4682            // Disable pressed state, which was introduced when TextView was made clickable.
4683            // Prevents text color change.
4684            // setClickable(false) would have a similar effect, but it also disables focus changes
4685            // and long press actions, which are both needed by text selection.
4686            final int length = drawableState.length;
4687            for (int i = 0; i < length; i++) {
4688                if (drawableState[i] == R.attr.state_pressed) {
4689                    final int[] nonPressedState = new int[length - 1];
4690                    System.arraycopy(drawableState, 0, nonPressedState, 0, i);
4691                    System.arraycopy(drawableState, i + 1, nonPressedState, i, length - i - 1);
4692                    return nonPressedState;
4693                }
4694            }
4695        }
4696
4697        return drawableState;
4698    }
4699
4700    @Override
4701    protected void onDraw(Canvas canvas) {
4702        if (mPreDrawState == PREDRAW_DONE) {
4703            final ViewTreeObserver observer = getViewTreeObserver();
4704            observer.removeOnPreDrawListener(this);
4705            mPreDrawState = PREDRAW_NOT_REGISTERED;
4706        }
4707
4708        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return;
4709
4710        restartMarqueeIfNeeded();
4711
4712        // Draw the background for this view
4713        super.onDraw(canvas);
4714
4715        final int compoundPaddingLeft = getCompoundPaddingLeft();
4716        final int compoundPaddingTop = getCompoundPaddingTop();
4717        final int compoundPaddingRight = getCompoundPaddingRight();
4718        final int compoundPaddingBottom = getCompoundPaddingBottom();
4719        final int scrollX = mScrollX;
4720        final int scrollY = mScrollY;
4721        final int right = mRight;
4722        final int left = mLeft;
4723        final int bottom = mBottom;
4724        final int top = mTop;
4725
4726        final Drawables dr = mDrawables;
4727        if (dr != null) {
4728            /*
4729             * Compound, not extended, because the icon is not clipped
4730             * if the text height is smaller.
4731             */
4732
4733            int vspace = bottom - top - compoundPaddingBottom - compoundPaddingTop;
4734            int hspace = right - left - compoundPaddingRight - compoundPaddingLeft;
4735
4736            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4737            // Make sure to update invalidateDrawable() when changing this code.
4738            if (dr.mDrawableLeft != null) {
4739                canvas.save();
4740                canvas.translate(scrollX + mPaddingLeft,
4741                                 scrollY + compoundPaddingTop +
4742                                 (vspace - dr.mDrawableHeightLeft) / 2);
4743                dr.mDrawableLeft.draw(canvas);
4744                canvas.restore();
4745            }
4746
4747            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4748            // Make sure to update invalidateDrawable() when changing this code.
4749            if (dr.mDrawableRight != null) {
4750                canvas.save();
4751                canvas.translate(scrollX + right - left - mPaddingRight - dr.mDrawableSizeRight,
4752                         scrollY + compoundPaddingTop + (vspace - dr.mDrawableHeightRight) / 2);
4753                dr.mDrawableRight.draw(canvas);
4754                canvas.restore();
4755            }
4756
4757            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4758            // Make sure to update invalidateDrawable() when changing this code.
4759            if (dr.mDrawableTop != null) {
4760                canvas.save();
4761                canvas.translate(scrollX + compoundPaddingLeft + (hspace - dr.mDrawableWidthTop) / 2,
4762                        scrollY + mPaddingTop);
4763                dr.mDrawableTop.draw(canvas);
4764                canvas.restore();
4765            }
4766
4767            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4768            // Make sure to update invalidateDrawable() when changing this code.
4769            if (dr.mDrawableBottom != null) {
4770                canvas.save();
4771                canvas.translate(scrollX + compoundPaddingLeft +
4772                        (hspace - dr.mDrawableWidthBottom) / 2,
4773                         scrollY + bottom - top - mPaddingBottom - dr.mDrawableSizeBottom);
4774                dr.mDrawableBottom.draw(canvas);
4775                canvas.restore();
4776            }
4777        }
4778
4779        int color = mCurTextColor;
4780
4781        if (mLayout == null) {
4782            assumeLayout();
4783        }
4784
4785        Layout layout = mLayout;
4786        int cursorcolor = color;
4787
4788        if (mHint != null && mText.length() == 0) {
4789            if (mHintTextColor != null) {
4790                color = mCurHintTextColor;
4791            }
4792
4793            layout = mHintLayout;
4794        }
4795
4796        mTextPaint.setColor(color);
4797        if (mCurrentAlpha != 255) {
4798            // If set, the alpha will override the color's alpha. Multiply the alphas.
4799            mTextPaint.setAlpha((mCurrentAlpha * Color.alpha(color)) / 255);
4800        }
4801        mTextPaint.drawableState = getDrawableState();
4802
4803        canvas.save();
4804        /*  Would be faster if we didn't have to do this. Can we chop the
4805            (displayable) text so that we don't need to do this ever?
4806        */
4807
4808        int extendedPaddingTop = getExtendedPaddingTop();
4809        int extendedPaddingBottom = getExtendedPaddingBottom();
4810
4811        float clipLeft = compoundPaddingLeft + scrollX;
4812        float clipTop = extendedPaddingTop + scrollY;
4813        float clipRight = right - left - compoundPaddingRight + scrollX;
4814        float clipBottom = bottom - top - extendedPaddingBottom + scrollY;
4815
4816        if (mShadowRadius != 0) {
4817            clipLeft += Math.min(0, mShadowDx - mShadowRadius);
4818            clipRight += Math.max(0, mShadowDx + mShadowRadius);
4819
4820            clipTop += Math.min(0, mShadowDy - mShadowRadius);
4821            clipBottom += Math.max(0, mShadowDy + mShadowRadius);
4822        }
4823
4824        canvas.clipRect(clipLeft, clipTop, clipRight, clipBottom);
4825
4826        int voffsetText = 0;
4827        int voffsetCursor = 0;
4828
4829        // translate in by our padding
4830        {
4831            /* shortcircuit calling getVerticaOffset() */
4832            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4833                voffsetText = getVerticalOffset(false);
4834                voffsetCursor = getVerticalOffset(true);
4835            }
4836            canvas.translate(compoundPaddingLeft, extendedPaddingTop + voffsetText);
4837        }
4838
4839        final int layoutDirection = getResolvedLayoutDirection();
4840        final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
4841        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
4842                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
4843            if (!mSingleLine && getLineCount() == 1 && canMarquee() &&
4844                    (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) != Gravity.LEFT) {
4845                canvas.translate(mLayout.getLineRight(0) - (mRight - mLeft -
4846                        getCompoundPaddingLeft() - getCompoundPaddingRight()), 0.0f);
4847            }
4848
4849            if (mMarquee != null && mMarquee.isRunning()) {
4850                canvas.translate(-mMarquee.mScroll, 0.0f);
4851            }
4852        }
4853
4854        Path highlight = null;
4855        int selStart = -1, selEnd = -1;
4856        boolean drawCursor = false;
4857
4858        //  If there is no movement method, then there can be no selection.
4859        //  Check that first and attempt to skip everything having to do with
4860        //  the cursor.
4861        //  XXX This is not strictly true -- a program could set the
4862        //  selection manually if it really wanted to.
4863        if (mMovement != null && (isFocused() || isPressed())) {
4864            selStart = getSelectionStart();
4865            selEnd = getSelectionEnd();
4866
4867            if (selStart >= 0) {
4868                if (mHighlightPath == null) mHighlightPath = new Path();
4869
4870                if (selStart == selEnd) {
4871                    if (isCursorVisible() &&
4872                            (SystemClock.uptimeMillis() - mShowCursor) % (2 * BLINK) < BLINK) {
4873                        if (mHighlightPathBogus) {
4874                            mHighlightPath.reset();
4875                            mLayout.getCursorPath(selStart, mHighlightPath, mText);
4876                            updateCursorsPositions();
4877                            mHighlightPathBogus = false;
4878                        }
4879
4880                        // XXX should pass to skin instead of drawing directly
4881                        mHighlightPaint.setColor(cursorcolor);
4882                        if (mCurrentAlpha != 255) {
4883                            mHighlightPaint.setAlpha(
4884                                    (mCurrentAlpha * Color.alpha(cursorcolor)) / 255);
4885                        }
4886                        mHighlightPaint.setStyle(Paint.Style.STROKE);
4887                        highlight = mHighlightPath;
4888                        drawCursor = mCursorCount > 0;
4889                    }
4890                } else if (textCanBeSelected()) {
4891                    if (mHighlightPathBogus) {
4892                        mHighlightPath.reset();
4893                        mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
4894                        mHighlightPathBogus = false;
4895                    }
4896
4897                    // XXX should pass to skin instead of drawing directly
4898                    mHighlightPaint.setColor(mHighlightColor);
4899                    if (mCurrentAlpha != 255) {
4900                        mHighlightPaint.setAlpha(
4901                                (mCurrentAlpha * Color.alpha(mHighlightColor)) / 255);
4902                    }
4903                    mHighlightPaint.setStyle(Paint.Style.FILL);
4904
4905                    highlight = mHighlightPath;
4906                }
4907            }
4908        }
4909
4910        /*  Comment out until we decide what to do about animations
4911        boolean isLinearTextOn = false;
4912        if (currentTransformation != null) {
4913            isLinearTextOn = mTextPaint.isLinearTextOn();
4914            Matrix m = currentTransformation.getMatrix();
4915            if (!m.isIdentity()) {
4916                // mTextPaint.setLinearTextOn(true);
4917            }
4918        }
4919        */
4920
4921        final InputMethodState ims = mInputMethodState;
4922        final int cursorOffsetVertical = voffsetCursor - voffsetText;
4923        if (ims != null && ims.mBatchEditNesting == 0) {
4924            InputMethodManager imm = InputMethodManager.peekInstance();
4925            if (imm != null) {
4926                if (imm.isActive(this)) {
4927                    boolean reported = false;
4928                    if (ims.mContentChanged || ims.mSelectionModeChanged) {
4929                        // We are in extract mode and the content has changed
4930                        // in some way... just report complete new text to the
4931                        // input method.
4932                        reported = reportExtractedText();
4933                    }
4934                    if (!reported && highlight != null) {
4935                        int candStart = -1;
4936                        int candEnd = -1;
4937                        if (mText instanceof Spannable) {
4938                            Spannable sp = (Spannable)mText;
4939                            candStart = EditableInputConnection.getComposingSpanStart(sp);
4940                            candEnd = EditableInputConnection.getComposingSpanEnd(sp);
4941                        }
4942                        imm.updateSelection(this, selStart, selEnd, candStart, candEnd);
4943                    }
4944                }
4945
4946                if (imm.isWatchingCursor(this) && highlight != null) {
4947                    highlight.computeBounds(ims.mTmpRectF, true);
4948                    ims.mTmpOffset[0] = ims.mTmpOffset[1] = 0;
4949
4950                    canvas.getMatrix().mapPoints(ims.mTmpOffset);
4951                    ims.mTmpRectF.offset(ims.mTmpOffset[0], ims.mTmpOffset[1]);
4952
4953                    ims.mTmpRectF.offset(0, cursorOffsetVertical);
4954
4955                    ims.mCursorRectInWindow.set((int)(ims.mTmpRectF.left + 0.5),
4956                            (int)(ims.mTmpRectF.top + 0.5),
4957                            (int)(ims.mTmpRectF.right + 0.5),
4958                            (int)(ims.mTmpRectF.bottom + 0.5));
4959
4960                    imm.updateCursor(this,
4961                            ims.mCursorRectInWindow.left, ims.mCursorRectInWindow.top,
4962                            ims.mCursorRectInWindow.right, ims.mCursorRectInWindow.bottom);
4963                }
4964            }
4965        }
4966
4967        if (mCorrectionHighlighter != null) {
4968            mCorrectionHighlighter.draw(canvas, cursorOffsetVertical);
4969        }
4970
4971        if (drawCursor) {
4972            drawCursor(canvas, cursorOffsetVertical);
4973            // Rely on the drawable entirely, do not draw the cursor line.
4974            // Has to be done after the IMM related code above which relies on the highlight.
4975            highlight = null;
4976        }
4977
4978        layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
4979
4980        if (mMarquee != null && mMarquee.shouldDrawGhost()) {
4981            canvas.translate((int) mMarquee.getGhostOffset(), 0.0f);
4982            layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
4983        }
4984
4985        /*  Comment out until we decide what to do about animations
4986        if (currentTransformation != null) {
4987            mTextPaint.setLinearTextOn(isLinearTextOn);
4988        }
4989        */
4990
4991        canvas.restore();
4992    }
4993
4994    private void updateCursorsPositions() {
4995        if (mCursorDrawableRes == 0) {
4996            mCursorCount = 0;
4997            return;
4998        }
4999
5000        final int offset = getSelectionStart();
5001        final int line = mLayout.getLineForOffset(offset);
5002        final int top = mLayout.getLineTop(line);
5003        final int bottom = mLayout.getLineTop(line + 1);
5004
5005        mCursorCount = mLayout.isLevelBoundary(offset) ? 2 : 1;
5006
5007        int middle = bottom;
5008        if (mCursorCount == 2) {
5009            // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)}
5010            middle = (top + bottom) >> 1;
5011        }
5012
5013        updateCursorPosition(0, top, middle, mLayout.getPrimaryHorizontal(offset));
5014
5015        if (mCursorCount == 2) {
5016            updateCursorPosition(1, middle, bottom, mLayout.getSecondaryHorizontal(offset));
5017        }
5018    }
5019
5020    private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) {
5021        if (mCursorDrawable[cursorIndex] == null)
5022            mCursorDrawable[cursorIndex] = mContext.getResources().getDrawable(mCursorDrawableRes);
5023
5024        if (mTempRect == null) mTempRect = new Rect();
5025
5026        mCursorDrawable[cursorIndex].getPadding(mTempRect);
5027        final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth();
5028        horizontal = Math.max(0.5f, horizontal - 0.5f);
5029        final int left = (int) (horizontal) - mTempRect.left;
5030        mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width,
5031                bottom + mTempRect.bottom);
5032    }
5033
5034    private void drawCursor(Canvas canvas, int cursorOffsetVertical) {
5035        final boolean translate = cursorOffsetVertical != 0;
5036        if (translate) canvas.translate(0, cursorOffsetVertical);
5037        for (int i = 0; i < mCursorCount; i++) {
5038            mCursorDrawable[i].draw(canvas);
5039        }
5040        if (translate) canvas.translate(0, -cursorOffsetVertical);
5041    }
5042
5043    @Override
5044    public void getFocusedRect(Rect r) {
5045        if (mLayout == null) {
5046            super.getFocusedRect(r);
5047            return;
5048        }
5049
5050        int selEnd = getSelectionEnd();
5051        if (selEnd < 0) {
5052            super.getFocusedRect(r);
5053            return;
5054        }
5055
5056        int selStart = getSelectionStart();
5057        if (selStart < 0 || selStart >= selEnd) {
5058            int line = mLayout.getLineForOffset(selEnd);
5059            r.top = mLayout.getLineTop(line);
5060            r.bottom = mLayout.getLineBottom(line);
5061            r.left = (int) mLayout.getPrimaryHorizontal(selEnd) - 2;
5062            r.right = r.left + 4;
5063        } else {
5064            int lineStart = mLayout.getLineForOffset(selStart);
5065            int lineEnd = mLayout.getLineForOffset(selEnd);
5066            r.top = mLayout.getLineTop(lineStart);
5067            r.bottom = mLayout.getLineBottom(lineEnd);
5068            if (lineStart == lineEnd) {
5069                r.left = (int) mLayout.getPrimaryHorizontal(selStart);
5070                r.right = (int) mLayout.getPrimaryHorizontal(selEnd);
5071            } else {
5072                // Selection extends across multiple lines -- the focused
5073                // rect covers the entire width.
5074                if (mHighlightPath == null) mHighlightPath = new Path();
5075                if (mHighlightPathBogus) {
5076                    mHighlightPath.reset();
5077                    mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
5078                    mHighlightPathBogus = false;
5079                }
5080                synchronized (sTempRect) {
5081                    mHighlightPath.computeBounds(sTempRect, true);
5082                    r.left = (int)sTempRect.left-1;
5083                    r.right = (int)sTempRect.right+1;
5084                }
5085            }
5086        }
5087
5088        // Adjust for padding and gravity.
5089        int paddingLeft = getCompoundPaddingLeft();
5090        int paddingTop = getExtendedPaddingTop();
5091        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5092            paddingTop += getVerticalOffset(false);
5093        }
5094        r.offset(paddingLeft, paddingTop);
5095    }
5096
5097    /**
5098     * Return the number of lines of text, or 0 if the internal Layout has not
5099     * been built.
5100     */
5101    public int getLineCount() {
5102        return mLayout != null ? mLayout.getLineCount() : 0;
5103    }
5104
5105    /**
5106     * Return the baseline for the specified line (0...getLineCount() - 1)
5107     * If bounds is not null, return the top, left, right, bottom extents
5108     * of the specified line in it. If the internal Layout has not been built,
5109     * return 0 and set bounds to (0, 0, 0, 0)
5110     * @param line which line to examine (0..getLineCount() - 1)
5111     * @param bounds Optional. If not null, it returns the extent of the line
5112     * @return the Y-coordinate of the baseline
5113     */
5114    public int getLineBounds(int line, Rect bounds) {
5115        if (mLayout == null) {
5116            if (bounds != null) {
5117                bounds.set(0, 0, 0, 0);
5118            }
5119            return 0;
5120        }
5121        else {
5122            int baseline = mLayout.getLineBounds(line, bounds);
5123
5124            int voffset = getExtendedPaddingTop();
5125            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5126                voffset += getVerticalOffset(true);
5127            }
5128            if (bounds != null) {
5129                bounds.offset(getCompoundPaddingLeft(), voffset);
5130            }
5131            return baseline + voffset;
5132        }
5133    }
5134
5135    @Override
5136    public int getBaseline() {
5137        if (mLayout == null) {
5138            return super.getBaseline();
5139        }
5140
5141        int voffset = 0;
5142        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5143            voffset = getVerticalOffset(true);
5144        }
5145
5146        return getExtendedPaddingTop() + voffset + mLayout.getLineBaseline(0);
5147    }
5148
5149    /**
5150     * @hide
5151     * @param offsetRequired
5152     */
5153    @Override
5154    protected int getFadeTop(boolean offsetRequired) {
5155        if (mLayout == null) return 0;
5156
5157        int voffset = 0;
5158        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5159            voffset = getVerticalOffset(true);
5160        }
5161
5162        if (offsetRequired) voffset += getTopPaddingOffset();
5163
5164        return getExtendedPaddingTop() + voffset;
5165    }
5166
5167    /**
5168     * @hide
5169     * @param offsetRequired
5170     */
5171    @Override
5172    protected int getFadeHeight(boolean offsetRequired) {
5173        return mLayout != null ? mLayout.getHeight() : 0;
5174    }
5175
5176    @Override
5177    public boolean onKeyPreIme(int keyCode, KeyEvent event) {
5178        if (keyCode == KeyEvent.KEYCODE_BACK) {
5179            boolean isInSelectionMode = mSelectionActionMode != null;
5180
5181            if (isInSelectionMode) {
5182                if (event.getAction() == KeyEvent.ACTION_DOWN && event.getRepeatCount() == 0) {
5183                    KeyEvent.DispatcherState state = getKeyDispatcherState();
5184                    if (state != null) {
5185                        state.startTracking(event, this);
5186                    }
5187                    return true;
5188                } else if (event.getAction() == KeyEvent.ACTION_UP) {
5189                    KeyEvent.DispatcherState state = getKeyDispatcherState();
5190                    if (state != null) {
5191                        state.handleUpEvent(event);
5192                    }
5193                    if (event.isTracking() && !event.isCanceled()) {
5194                        if (isInSelectionMode) {
5195                            stopSelectionActionMode();
5196                            return true;
5197                        }
5198                    }
5199                }
5200            }
5201        }
5202        return super.onKeyPreIme(keyCode, event);
5203    }
5204
5205    @Override
5206    public boolean onKeyDown(int keyCode, KeyEvent event) {
5207        int which = doKeyDown(keyCode, event, null);
5208        if (which == 0) {
5209            // Go through default dispatching.
5210            return super.onKeyDown(keyCode, event);
5211        }
5212
5213        return true;
5214    }
5215
5216    @Override
5217    public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) {
5218        KeyEvent down = KeyEvent.changeAction(event, KeyEvent.ACTION_DOWN);
5219
5220        int which = doKeyDown(keyCode, down, event);
5221        if (which == 0) {
5222            // Go through default dispatching.
5223            return super.onKeyMultiple(keyCode, repeatCount, event);
5224        }
5225        if (which == -1) {
5226            // Consumed the whole thing.
5227            return true;
5228        }
5229
5230        repeatCount--;
5231
5232        // We are going to dispatch the remaining events to either the input
5233        // or movement method.  To do this, we will just send a repeated stream
5234        // of down and up events until we have done the complete repeatCount.
5235        // It would be nice if those interfaces had an onKeyMultiple() method,
5236        // but adding that is a more complicated change.
5237        KeyEvent up = KeyEvent.changeAction(event, KeyEvent.ACTION_UP);
5238        if (which == 1) {
5239            mInput.onKeyUp(this, (Editable)mText, keyCode, up);
5240            while (--repeatCount > 0) {
5241                mInput.onKeyDown(this, (Editable)mText, keyCode, down);
5242                mInput.onKeyUp(this, (Editable)mText, keyCode, up);
5243            }
5244            hideErrorIfUnchanged();
5245
5246        } else if (which == 2) {
5247            mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
5248            while (--repeatCount > 0) {
5249                mMovement.onKeyDown(this, (Spannable)mText, keyCode, down);
5250                mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
5251            }
5252        }
5253
5254        return true;
5255    }
5256
5257    /**
5258     * Returns true if pressing ENTER in this field advances focus instead
5259     * of inserting the character.  This is true mostly in single-line fields,
5260     * but also in mail addresses and subjects which will display on multiple
5261     * lines but where it doesn't make sense to insert newlines.
5262     */
5263    private boolean shouldAdvanceFocusOnEnter() {
5264        if (mInput == null) {
5265            return false;
5266        }
5267
5268        if (mSingleLine) {
5269            return true;
5270        }
5271
5272        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
5273            int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
5274            if (variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_ADDRESS
5275                    || variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT) {
5276                return true;
5277            }
5278        }
5279
5280        return false;
5281    }
5282
5283    /**
5284     * Returns true if pressing TAB in this field advances focus instead
5285     * of inserting the character.  Insert tabs only in multi-line editors.
5286     */
5287    private boolean shouldAdvanceFocusOnTab() {
5288        if (mInput != null && !mSingleLine) {
5289            if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
5290                int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
5291                if (variation == EditorInfo.TYPE_TEXT_FLAG_IME_MULTI_LINE
5292                        || variation == EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE) {
5293                    return false;
5294                }
5295            }
5296        }
5297        return true;
5298    }
5299
5300    private int doKeyDown(int keyCode, KeyEvent event, KeyEvent otherEvent) {
5301        if (!isEnabled()) {
5302            return 0;
5303        }
5304
5305        switch (keyCode) {
5306            case KeyEvent.KEYCODE_ENTER:
5307                mEnterKeyIsDown = true;
5308                if (event.hasNoModifiers()) {
5309                    // When mInputContentType is set, we know that we are
5310                    // running in a "modern" cupcake environment, so don't need
5311                    // to worry about the application trying to capture
5312                    // enter key events.
5313                    if (mInputContentType != null) {
5314                        // If there is an action listener, given them a
5315                        // chance to consume the event.
5316                        if (mInputContentType.onEditorActionListener != null &&
5317                                mInputContentType.onEditorActionListener.onEditorAction(
5318                                this, EditorInfo.IME_NULL, event)) {
5319                            mInputContentType.enterDown = true;
5320                            // We are consuming the enter key for them.
5321                            return -1;
5322                        }
5323                    }
5324
5325                    // If our editor should move focus when enter is pressed, or
5326                    // this is a generated event from an IME action button, then
5327                    // don't let it be inserted into the text.
5328                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
5329                            || shouldAdvanceFocusOnEnter()) {
5330                        if (mOnClickListener != null) {
5331                            return 0;
5332                        }
5333                        return -1;
5334                    }
5335                }
5336                break;
5337
5338            case KeyEvent.KEYCODE_DPAD_CENTER:
5339                mDPadCenterIsDown = true;
5340                if (event.hasNoModifiers()) {
5341                    if (shouldAdvanceFocusOnEnter()) {
5342                        return 0;
5343                    }
5344                }
5345                break;
5346
5347            case KeyEvent.KEYCODE_TAB:
5348                if (event.hasNoModifiers() || event.hasModifiers(KeyEvent.META_SHIFT_ON)) {
5349                    if (shouldAdvanceFocusOnTab()) {
5350                        return 0;
5351                    }
5352                }
5353                break;
5354
5355                // Has to be done on key down (and not on key up) to correctly be intercepted.
5356            case KeyEvent.KEYCODE_BACK:
5357                if (mSelectionActionMode != null) {
5358                    stopSelectionActionMode();
5359                    return -1;
5360                }
5361                break;
5362        }
5363
5364        if (mInput != null) {
5365            resetErrorChangedFlag();
5366
5367            boolean doDown = true;
5368            if (otherEvent != null) {
5369                try {
5370                    beginBatchEdit();
5371                    final boolean handled = mInput.onKeyOther(this, (Editable) mText, otherEvent);
5372                    hideErrorIfUnchanged();
5373                    doDown = false;
5374                    if (handled) {
5375                        return -1;
5376                    }
5377                } catch (AbstractMethodError e) {
5378                    // onKeyOther was added after 1.0, so if it isn't
5379                    // implemented we need to try to dispatch as a regular down.
5380                } finally {
5381                    endBatchEdit();
5382                }
5383            }
5384
5385            if (doDown) {
5386                beginBatchEdit();
5387                final boolean handled = mInput.onKeyDown(this, (Editable) mText, keyCode, event);
5388                endBatchEdit();
5389                hideErrorIfUnchanged();
5390                if (handled) return 1;
5391            }
5392        }
5393
5394        // bug 650865: sometimes we get a key event before a layout.
5395        // don't try to move around if we don't know the layout.
5396
5397        if (mMovement != null && mLayout != null) {
5398            boolean doDown = true;
5399            if (otherEvent != null) {
5400                try {
5401                    boolean handled = mMovement.onKeyOther(this, (Spannable) mText,
5402                            otherEvent);
5403                    doDown = false;
5404                    if (handled) {
5405                        return -1;
5406                    }
5407                } catch (AbstractMethodError e) {
5408                    // onKeyOther was added after 1.0, so if it isn't
5409                    // implemented we need to try to dispatch as a regular down.
5410                }
5411            }
5412            if (doDown) {
5413                if (mMovement.onKeyDown(this, (Spannable)mText, keyCode, event))
5414                    return 2;
5415            }
5416        }
5417
5418        return 0;
5419    }
5420
5421    /**
5422     * Resets the mErrorWasChanged flag, so that future calls to {@link #setError(CharSequence)}
5423     * can be recorded.
5424     * @hide
5425     */
5426    public void resetErrorChangedFlag() {
5427        /*
5428         * Keep track of what the error was before doing the input
5429         * so that if an input filter changed the error, we leave
5430         * that error showing.  Otherwise, we take down whatever
5431         * error was showing when the user types something.
5432         */
5433        mErrorWasChanged = false;
5434    }
5435
5436    /**
5437     * @hide
5438     */
5439    public void hideErrorIfUnchanged() {
5440        if (mError != null && !mErrorWasChanged) {
5441            setError(null, null);
5442        }
5443    }
5444
5445    @Override
5446    public boolean onKeyUp(int keyCode, KeyEvent event) {
5447        if (!isEnabled()) {
5448            return super.onKeyUp(keyCode, event);
5449        }
5450
5451        switch (keyCode) {
5452            case KeyEvent.KEYCODE_DPAD_CENTER:
5453                mDPadCenterIsDown = false;
5454                if (event.hasNoModifiers()) {
5455                    /*
5456                     * If there is a click listener, just call through to
5457                     * super, which will invoke it.
5458                     *
5459                     * If there isn't a click listener, try to show the soft
5460                     * input method.  (It will also
5461                     * call performClick(), but that won't do anything in
5462                     * this case.)
5463                     */
5464                    if (mOnClickListener == null) {
5465                        if (mMovement != null && mText instanceof Editable
5466                                && mLayout != null && onCheckIsTextEditor()) {
5467                            InputMethodManager imm = InputMethodManager.peekInstance();
5468                            viewClicked(imm);
5469                            if (imm != null) {
5470                                imm.showSoftInput(this, 0);
5471                            }
5472                        }
5473                    }
5474                }
5475                return super.onKeyUp(keyCode, event);
5476
5477            case KeyEvent.KEYCODE_ENTER:
5478                mEnterKeyIsDown = false;
5479                if (event.hasNoModifiers()) {
5480                    if (mInputContentType != null
5481                            && mInputContentType.onEditorActionListener != null
5482                            && mInputContentType.enterDown) {
5483                        mInputContentType.enterDown = false;
5484                        if (mInputContentType.onEditorActionListener.onEditorAction(
5485                                this, EditorInfo.IME_NULL, event)) {
5486                            return true;
5487                        }
5488                    }
5489
5490                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
5491                            || shouldAdvanceFocusOnEnter()) {
5492                        /*
5493                         * If there is a click listener, just call through to
5494                         * super, which will invoke it.
5495                         *
5496                         * If there isn't a click listener, try to advance focus,
5497                         * but still call through to super, which will reset the
5498                         * pressed state and longpress state.  (It will also
5499                         * call performClick(), but that won't do anything in
5500                         * this case.)
5501                         */
5502                        if (mOnClickListener == null) {
5503                            View v = focusSearch(FOCUS_DOWN);
5504
5505                            if (v != null) {
5506                                if (!v.requestFocus(FOCUS_DOWN)) {
5507                                    throw new IllegalStateException(
5508                                            "focus search returned a view " +
5509                                            "that wasn't able to take focus!");
5510                                }
5511
5512                                /*
5513                                 * Return true because we handled the key; super
5514                                 * will return false because there was no click
5515                                 * listener.
5516                                 */
5517                                super.onKeyUp(keyCode, event);
5518                                return true;
5519                            } else if ((event.getFlags()
5520                                    & KeyEvent.FLAG_EDITOR_ACTION) != 0) {
5521                                // No target for next focus, but make sure the IME
5522                                // if this came from it.
5523                                InputMethodManager imm = InputMethodManager.peekInstance();
5524                                if (imm != null && imm.isActive(this)) {
5525                                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
5526                                }
5527                            }
5528                        }
5529                    }
5530                    return super.onKeyUp(keyCode, event);
5531                }
5532                break;
5533        }
5534
5535        if (mInput != null)
5536            if (mInput.onKeyUp(this, (Editable) mText, keyCode, event))
5537                return true;
5538
5539        if (mMovement != null && mLayout != null)
5540            if (mMovement.onKeyUp(this, (Spannable) mText, keyCode, event))
5541                return true;
5542
5543        return super.onKeyUp(keyCode, event);
5544    }
5545
5546    @Override public boolean onCheckIsTextEditor() {
5547        return mInputType != EditorInfo.TYPE_NULL;
5548    }
5549
5550    @Override public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
5551        if (onCheckIsTextEditor() && isEnabled()) {
5552            if (mInputMethodState == null) {
5553                mInputMethodState = new InputMethodState();
5554            }
5555            outAttrs.inputType = mInputType;
5556            if (mInputContentType != null) {
5557                outAttrs.imeOptions = mInputContentType.imeOptions;
5558                outAttrs.privateImeOptions = mInputContentType.privateImeOptions;
5559                outAttrs.actionLabel = mInputContentType.imeActionLabel;
5560                outAttrs.actionId = mInputContentType.imeActionId;
5561                outAttrs.extras = mInputContentType.extras;
5562            } else {
5563                outAttrs.imeOptions = EditorInfo.IME_NULL;
5564            }
5565            if (focusSearch(FOCUS_DOWN) != null) {
5566                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_NEXT;
5567            }
5568            if (focusSearch(FOCUS_UP) != null) {
5569                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_PREVIOUS;
5570            }
5571            if ((outAttrs.imeOptions&EditorInfo.IME_MASK_ACTION)
5572                    == EditorInfo.IME_ACTION_UNSPECIFIED) {
5573                if ((outAttrs.imeOptions&EditorInfo.IME_FLAG_NAVIGATE_NEXT) != 0) {
5574                    // An action has not been set, but the enter key will move to
5575                    // the next focus, so set the action to that.
5576                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_NEXT;
5577                } else {
5578                    // An action has not been set, and there is no focus to move
5579                    // to, so let's just supply a "done" action.
5580                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_DONE;
5581                }
5582                if (!shouldAdvanceFocusOnEnter()) {
5583                    outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5584                }
5585            }
5586            if (isMultilineInputType(outAttrs.inputType)) {
5587                // Multi-line text editors should always show an enter key.
5588                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5589            }
5590            outAttrs.hintText = mHint;
5591            if (mText instanceof Editable) {
5592                InputConnection ic = new EditableInputConnection(this);
5593                outAttrs.initialSelStart = getSelectionStart();
5594                outAttrs.initialSelEnd = getSelectionEnd();
5595                outAttrs.initialCapsMode = ic.getCursorCapsMode(mInputType);
5596                return ic;
5597            }
5598        }
5599        return null;
5600    }
5601
5602    /**
5603     * If this TextView contains editable content, extract a portion of it
5604     * based on the information in <var>request</var> in to <var>outText</var>.
5605     * @return Returns true if the text was successfully extracted, else false.
5606     */
5607    public boolean extractText(ExtractedTextRequest request,
5608            ExtractedText outText) {
5609        return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN,
5610                EXTRACT_UNKNOWN, outText);
5611    }
5612
5613    static final int EXTRACT_NOTHING = -2;
5614    static final int EXTRACT_UNKNOWN = -1;
5615
5616    boolean extractTextInternal(ExtractedTextRequest request,
5617            int partialStartOffset, int partialEndOffset, int delta,
5618            ExtractedText outText) {
5619        final CharSequence content = mText;
5620        if (content != null) {
5621            if (partialStartOffset != EXTRACT_NOTHING) {
5622                final int N = content.length();
5623                if (partialStartOffset < 0) {
5624                    outText.partialStartOffset = outText.partialEndOffset = -1;
5625                    partialStartOffset = 0;
5626                    partialEndOffset = N;
5627                } else {
5628                    // Now use the delta to determine the actual amount of text
5629                    // we need.
5630                    partialEndOffset += delta;
5631                    // Adjust offsets to ensure we contain full spans.
5632                    if (content instanceof Spanned) {
5633                        Spanned spanned = (Spanned)content;
5634                        Object[] spans = spanned.getSpans(partialStartOffset,
5635                                partialEndOffset, ParcelableSpan.class);
5636                        int i = spans.length;
5637                        while (i > 0) {
5638                            i--;
5639                            int j = spanned.getSpanStart(spans[i]);
5640                            if (j < partialStartOffset) partialStartOffset = j;
5641                            j = spanned.getSpanEnd(spans[i]);
5642                            if (j > partialEndOffset) partialEndOffset = j;
5643                        }
5644                    }
5645                    outText.partialStartOffset = partialStartOffset;
5646                    outText.partialEndOffset = partialEndOffset - delta;
5647
5648                    if (partialStartOffset > N) {
5649                        partialStartOffset = N;
5650                    } else if (partialStartOffset < 0) {
5651                        partialStartOffset = 0;
5652                    }
5653                    if (partialEndOffset > N) {
5654                        partialEndOffset = N;
5655                    } else if (partialEndOffset < 0) {
5656                        partialEndOffset = 0;
5657                    }
5658                }
5659                if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) {
5660                    outText.text = content.subSequence(partialStartOffset,
5661                            partialEndOffset);
5662                } else {
5663                    outText.text = TextUtils.substring(content, partialStartOffset,
5664                            partialEndOffset);
5665                }
5666            } else {
5667                outText.partialStartOffset = 0;
5668                outText.partialEndOffset = 0;
5669                outText.text = "";
5670            }
5671            outText.flags = 0;
5672            if (MetaKeyKeyListener.getMetaState(mText, MetaKeyKeyListener.META_SELECTING) != 0) {
5673                outText.flags |= ExtractedText.FLAG_SELECTING;
5674            }
5675            if (mSingleLine) {
5676                outText.flags |= ExtractedText.FLAG_SINGLE_LINE;
5677            }
5678            outText.startOffset = 0;
5679            outText.selectionStart = getSelectionStart();
5680            outText.selectionEnd = getSelectionEnd();
5681            return true;
5682        }
5683        return false;
5684    }
5685
5686    boolean reportExtractedText() {
5687        final InputMethodState ims = mInputMethodState;
5688        if (ims != null) {
5689            final boolean contentChanged = ims.mContentChanged;
5690            if (contentChanged || ims.mSelectionModeChanged) {
5691                ims.mContentChanged = false;
5692                ims.mSelectionModeChanged = false;
5693                final ExtractedTextRequest req = mInputMethodState.mExtracting;
5694                if (req != null) {
5695                    InputMethodManager imm = InputMethodManager.peekInstance();
5696                    if (imm != null) {
5697                        if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Retrieving extracted start="
5698                                + ims.mChangedStart + " end=" + ims.mChangedEnd
5699                                + " delta=" + ims.mChangedDelta);
5700                        if (ims.mChangedStart < 0 && !contentChanged) {
5701                            ims.mChangedStart = EXTRACT_NOTHING;
5702                        }
5703                        if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd,
5704                                ims.mChangedDelta, ims.mTmpExtracted)) {
5705                            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Reporting extracted start="
5706                                    + ims.mTmpExtracted.partialStartOffset
5707                                    + " end=" + ims.mTmpExtracted.partialEndOffset
5708                                    + ": " + ims.mTmpExtracted.text);
5709                            imm.updateExtractedText(this, req.token,
5710                                    mInputMethodState.mTmpExtracted);
5711                            ims.mChangedStart = EXTRACT_UNKNOWN;
5712                            ims.mChangedEnd = EXTRACT_UNKNOWN;
5713                            ims.mChangedDelta = 0;
5714                            ims.mContentChanged = false;
5715                            return true;
5716                        }
5717                    }
5718                }
5719            }
5720        }
5721        return false;
5722    }
5723
5724    /**
5725     * This is used to remove all style-impacting spans from text before new
5726     * extracted text is being replaced into it, so that we don't have any
5727     * lingering spans applied during the replace.
5728     */
5729    static void removeParcelableSpans(Spannable spannable, int start, int end) {
5730        Object[] spans = spannable.getSpans(start, end, ParcelableSpan.class);
5731        int i = spans.length;
5732        while (i > 0) {
5733            i--;
5734            spannable.removeSpan(spans[i]);
5735        }
5736    }
5737
5738    /**
5739     * Apply to this text view the given extracted text, as previously
5740     * returned by {@link #extractText(ExtractedTextRequest, ExtractedText)}.
5741     */
5742    public void setExtractedText(ExtractedText text) {
5743        Editable content = getEditableText();
5744        if (text.text != null) {
5745            if (content == null) {
5746                setText(text.text, TextView.BufferType.EDITABLE);
5747            } else if (text.partialStartOffset < 0) {
5748                removeParcelableSpans(content, 0, content.length());
5749                content.replace(0, content.length(), text.text);
5750            } else {
5751                final int N = content.length();
5752                int start = text.partialStartOffset;
5753                if (start > N) start = N;
5754                int end = text.partialEndOffset;
5755                if (end > N) end = N;
5756                removeParcelableSpans(content, start, end);
5757                content.replace(start, end, text.text);
5758            }
5759        }
5760
5761        // Now set the selection position...  make sure it is in range, to
5762        // avoid crashes.  If this is a partial update, it is possible that
5763        // the underlying text may have changed, causing us problems here.
5764        // Also we just don't want to trust clients to do the right thing.
5765        Spannable sp = (Spannable)getText();
5766        final int N = sp.length();
5767        int start = text.selectionStart;
5768        if (start < 0) start = 0;
5769        else if (start > N) start = N;
5770        int end = text.selectionEnd;
5771        if (end < 0) end = 0;
5772        else if (end > N) end = N;
5773        Selection.setSelection(sp, start, end);
5774
5775        // Finally, update the selection mode.
5776        if ((text.flags&ExtractedText.FLAG_SELECTING) != 0) {
5777            MetaKeyKeyListener.startSelecting(this, sp);
5778        } else {
5779            MetaKeyKeyListener.stopSelecting(this, sp);
5780        }
5781    }
5782
5783    /**
5784     * @hide
5785     */
5786    public void setExtracting(ExtractedTextRequest req) {
5787        if (mInputMethodState != null) {
5788            mInputMethodState.mExtracting = req;
5789        }
5790        // This would stop a possible selection mode, but no such mode is started in case
5791        // extracted mode will start. Some text is selected though, and will trigger an action mode
5792        // in the extracted view.
5793        hideControllers();
5794    }
5795
5796    /**
5797     * Called by the framework in response to a text completion from
5798     * the current input method, provided by it calling
5799     * {@link InputConnection#commitCompletion
5800     * InputConnection.commitCompletion()}.  The default implementation does
5801     * nothing; text views that are supporting auto-completion should override
5802     * this to do their desired behavior.
5803     *
5804     * @param text The auto complete text the user has selected.
5805     */
5806    public void onCommitCompletion(CompletionInfo text) {
5807        // intentionally empty
5808    }
5809
5810    /**
5811     * Called by the framework in response to a text auto-correction (such as fixing a typo using a
5812     * a dictionnary) from the current input method, provided by it calling
5813     * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default
5814     * implementation flashes the background of the corrected word to provide feedback to the user.
5815     *
5816     * @param info The auto correct info about the text that was corrected.
5817     */
5818    public void onCommitCorrection(CorrectionInfo info) {
5819        if (mCorrectionHighlighter == null) {
5820            mCorrectionHighlighter = new CorrectionHighlighter();
5821        } else {
5822            mCorrectionHighlighter.invalidate(false);
5823        }
5824
5825        mCorrectionHighlighter.highlight(info);
5826    }
5827
5828    private class CorrectionHighlighter {
5829        private final Path mPath = new Path();
5830        private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
5831        private int mStart, mEnd;
5832        private long mFadingStartTime;
5833        private final static int FADE_OUT_DURATION = 400;
5834
5835        public CorrectionHighlighter() {
5836            mPaint.setCompatibilityScaling(getResources().getCompatibilityInfo().applicationScale);
5837            mPaint.setStyle(Paint.Style.FILL);
5838        }
5839
5840        public void highlight(CorrectionInfo info) {
5841            mStart = info.getOffset();
5842            mEnd = mStart + info.getNewText().length();
5843            mFadingStartTime = SystemClock.uptimeMillis();
5844
5845            if (mStart < 0 || mEnd < 0) {
5846                stopAnimation();
5847            }
5848        }
5849
5850        public void draw(Canvas canvas, int cursorOffsetVertical) {
5851            if (updatePath() && updatePaint()) {
5852                if (cursorOffsetVertical != 0) {
5853                    canvas.translate(0, cursorOffsetVertical);
5854                }
5855
5856                canvas.drawPath(mPath, mPaint);
5857
5858                if (cursorOffsetVertical != 0) {
5859                    canvas.translate(0, -cursorOffsetVertical);
5860                }
5861                invalidate(true);
5862            } else {
5863                stopAnimation();
5864                invalidate(false);
5865            }
5866        }
5867
5868        private boolean updatePaint() {
5869            final long duration = SystemClock.uptimeMillis() - mFadingStartTime;
5870            if (duration > FADE_OUT_DURATION) return false;
5871
5872            final float coef = 1.0f - (float) duration / FADE_OUT_DURATION;
5873            final int highlightColorAlpha = Color.alpha(mHighlightColor);
5874            final int color = (mHighlightColor & 0x00FFFFFF) +
5875                    ((int) (highlightColorAlpha * coef) << 24);
5876            mPaint.setColor(color);
5877            return true;
5878        }
5879
5880        private boolean updatePath() {
5881            final Layout layout = TextView.this.mLayout;
5882            if (layout == null) return false;
5883
5884            // Update in case text is edited while the animation is run
5885            final int length = mText.length();
5886            int start = Math.min(length, mStart);
5887            int end = Math.min(length, mEnd);
5888
5889            mPath.reset();
5890            TextView.this.mLayout.getSelectionPath(start, end, mPath);
5891            return true;
5892        }
5893
5894        private void invalidate(boolean delayed) {
5895            if (TextView.this.mLayout == null) return;
5896
5897            synchronized (sTempRect) {
5898                mPath.computeBounds(sTempRect, false);
5899
5900                int left = getCompoundPaddingLeft();
5901                int top = getExtendedPaddingTop() + getVerticalOffset(true);
5902
5903                if (delayed) {
5904                    TextView.this.postInvalidateDelayed(16, // 60 Hz update
5905                            left + (int) sTempRect.left, top + (int) sTempRect.top,
5906                            left + (int) sTempRect.right, top + (int) sTempRect.bottom);
5907                } else {
5908                    TextView.this.postInvalidate((int) sTempRect.left, (int) sTempRect.top,
5909                            (int) sTempRect.right, (int) sTempRect.bottom);
5910                }
5911            }
5912        }
5913
5914        private void stopAnimation() {
5915            TextView.this.mCorrectionHighlighter = null;
5916        }
5917    }
5918
5919    public void beginBatchEdit() {
5920        mInBatchEditControllers = true;
5921        final InputMethodState ims = mInputMethodState;
5922        if (ims != null) {
5923            int nesting = ++ims.mBatchEditNesting;
5924            if (nesting == 1) {
5925                ims.mCursorChanged = false;
5926                ims.mChangedDelta = 0;
5927                if (ims.mContentChanged) {
5928                    // We already have a pending change from somewhere else,
5929                    // so turn this into a full update.
5930                    ims.mChangedStart = 0;
5931                    ims.mChangedEnd = mText.length();
5932                } else {
5933                    ims.mChangedStart = EXTRACT_UNKNOWN;
5934                    ims.mChangedEnd = EXTRACT_UNKNOWN;
5935                    ims.mContentChanged = false;
5936                }
5937                onBeginBatchEdit();
5938            }
5939        }
5940    }
5941
5942    public void endBatchEdit() {
5943        mInBatchEditControllers = false;
5944        final InputMethodState ims = mInputMethodState;
5945        if (ims != null) {
5946            int nesting = --ims.mBatchEditNesting;
5947            if (nesting == 0) {
5948                finishBatchEdit(ims);
5949            }
5950        }
5951    }
5952
5953    void ensureEndedBatchEdit() {
5954        final InputMethodState ims = mInputMethodState;
5955        if (ims != null && ims.mBatchEditNesting != 0) {
5956            ims.mBatchEditNesting = 0;
5957            finishBatchEdit(ims);
5958        }
5959    }
5960
5961    void finishBatchEdit(final InputMethodState ims) {
5962        onEndBatchEdit();
5963
5964        if (ims.mContentChanged || ims.mSelectionModeChanged) {
5965            updateAfterEdit();
5966            reportExtractedText();
5967        } else if (ims.mCursorChanged) {
5968            // Cheezy way to get us to report the current cursor location.
5969            invalidateCursor();
5970        }
5971    }
5972
5973    void updateAfterEdit() {
5974        invalidate();
5975        int curs = getSelectionStart();
5976
5977        if (curs >= 0 || (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
5978            registerForPreDraw();
5979        }
5980
5981        if (curs >= 0) {
5982            mHighlightPathBogus = true;
5983            makeBlink();
5984            bringPointIntoView(curs);
5985        }
5986
5987        checkForResize();
5988    }
5989
5990    /**
5991     * Called by the framework in response to a request to begin a batch
5992     * of edit operations through a call to link {@link #beginBatchEdit()}.
5993     */
5994    public void onBeginBatchEdit() {
5995        // intentionally empty
5996    }
5997
5998    /**
5999     * Called by the framework in response to a request to end a batch
6000     * of edit operations through a call to link {@link #endBatchEdit}.
6001     */
6002    public void onEndBatchEdit() {
6003        // intentionally empty
6004    }
6005
6006    /**
6007     * Called by the framework in response to a private command from the
6008     * current method, provided by it calling
6009     * {@link InputConnection#performPrivateCommand
6010     * InputConnection.performPrivateCommand()}.
6011     *
6012     * @param action The action name of the command.
6013     * @param data Any additional data for the command.  This may be null.
6014     * @return Return true if you handled the command, else false.
6015     */
6016    public boolean onPrivateIMECommand(String action, Bundle data) {
6017        return false;
6018    }
6019
6020    private void nullLayouts() {
6021        if (mLayout instanceof BoringLayout && mSavedLayout == null) {
6022            mSavedLayout = (BoringLayout) mLayout;
6023        }
6024        if (mHintLayout instanceof BoringLayout && mSavedHintLayout == null) {
6025            mSavedHintLayout = (BoringLayout) mHintLayout;
6026        }
6027
6028        mSavedMarqueeModeLayout = mLayout = mHintLayout = null;
6029
6030        // Since it depends on the value of mLayout
6031        prepareCursorControllers();
6032    }
6033
6034    /**
6035     * Make a new Layout based on the already-measured size of the view,
6036     * on the assumption that it was measured correctly at some point.
6037     */
6038    private void assumeLayout() {
6039        int width = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6040
6041        if (width < 1) {
6042            width = 0;
6043        }
6044
6045        int physicalWidth = width;
6046
6047        if (mHorizontallyScrolling) {
6048            width = VERY_WIDE;
6049        }
6050
6051        makeNewLayout(width, physicalWidth, UNKNOWN_BORING, UNKNOWN_BORING,
6052                      physicalWidth, false);
6053    }
6054
6055    @Override
6056    protected void resetResolvedLayoutDirection() {
6057        super.resetResolvedLayoutDirection();
6058
6059        if (mLayoutAlignment != null &&
6060                (mTextAlign == TextAlign.VIEW_START ||
6061                mTextAlign == TextAlign.VIEW_END)) {
6062            mLayoutAlignment = null;
6063        }
6064    }
6065
6066    private Layout.Alignment getLayoutAlignment() {
6067        if (mLayoutAlignment == null) {
6068            Layout.Alignment alignment;
6069            TextAlign textAlign = mTextAlign;
6070            switch (textAlign) {
6071                case INHERIT:
6072                    // fall through to gravity temporarily
6073                    // intention is to inherit value through view hierarchy.
6074                case GRAVITY:
6075                    switch (mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) {
6076                        case Gravity.START:
6077                            alignment = Layout.Alignment.ALIGN_NORMAL;
6078                            break;
6079                        case Gravity.END:
6080                            alignment = Layout.Alignment.ALIGN_OPPOSITE;
6081                            break;
6082                        case Gravity.LEFT:
6083                            alignment = Layout.Alignment.ALIGN_LEFT;
6084                            break;
6085                        case Gravity.RIGHT:
6086                            alignment = Layout.Alignment.ALIGN_RIGHT;
6087                            break;
6088                        case Gravity.CENTER_HORIZONTAL:
6089                            alignment = Layout.Alignment.ALIGN_CENTER;
6090                            break;
6091                        default:
6092                            alignment = Layout.Alignment.ALIGN_NORMAL;
6093                            break;
6094                    }
6095                    break;
6096                case TEXT_START:
6097                    alignment = Layout.Alignment.ALIGN_NORMAL;
6098                    break;
6099                case TEXT_END:
6100                    alignment = Layout.Alignment.ALIGN_OPPOSITE;
6101                    break;
6102                case CENTER:
6103                    alignment = Layout.Alignment.ALIGN_CENTER;
6104                    break;
6105                case VIEW_START:
6106                    alignment = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
6107                            Layout.Alignment.ALIGN_RIGHT : Layout.Alignment.ALIGN_LEFT;
6108                    break;
6109                case VIEW_END:
6110                    alignment = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
6111                            Layout.Alignment.ALIGN_LEFT : Layout.Alignment.ALIGN_RIGHT;
6112                    break;
6113                default:
6114                    alignment = Layout.Alignment.ALIGN_NORMAL;
6115                    break;
6116            }
6117            mLayoutAlignment = alignment;
6118        }
6119        return mLayoutAlignment;
6120    }
6121
6122    /**
6123     * The width passed in is now the desired layout width,
6124     * not the full view width with padding.
6125     * {@hide}
6126     */
6127    protected void makeNewLayout(int w, int hintWidth,
6128                                 BoringLayout.Metrics boring,
6129                                 BoringLayout.Metrics hintBoring,
6130                                 int ellipsisWidth, boolean bringIntoView) {
6131        stopMarquee();
6132
6133        // Update "old" cached values
6134        mOldMaximum = mMaximum;
6135        mOldMaxMode = mMaxMode;
6136
6137        mHighlightPathBogus = true;
6138
6139        if (w < 0) {
6140            w = 0;
6141        }
6142        if (hintWidth < 0) {
6143            hintWidth = 0;
6144        }
6145
6146        Layout.Alignment alignment = getLayoutAlignment();
6147        boolean shouldEllipsize = mEllipsize != null && mInput == null;
6148        final boolean switchEllipsize = mEllipsize == TruncateAt.MARQUEE &&
6149                mMarqueeFadeMode != MARQUEE_FADE_NORMAL;
6150        TruncateAt effectiveEllipsize = mEllipsize;
6151        if (mEllipsize == TruncateAt.MARQUEE &&
6152                mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
6153            effectiveEllipsize = TruncateAt.END_SMALL;
6154        }
6155
6156        if (mTextDir == null) {
6157            resolveTextDirection();
6158        }
6159
6160        mLayout = makeSingleLayout(w, boring, ellipsisWidth, alignment, shouldEllipsize,
6161                effectiveEllipsize, effectiveEllipsize == mEllipsize);
6162        if (switchEllipsize) {
6163            TruncateAt oppositeEllipsize = effectiveEllipsize == TruncateAt.MARQUEE ?
6164                    TruncateAt.END : TruncateAt.MARQUEE;
6165            mSavedMarqueeModeLayout = makeSingleLayout(w, boring, ellipsisWidth, alignment,
6166                    shouldEllipsize, oppositeEllipsize, effectiveEllipsize != mEllipsize);
6167        }
6168
6169        shouldEllipsize = mEllipsize != null;
6170        mHintLayout = null;
6171
6172        if (mHint != null) {
6173            if (shouldEllipsize) hintWidth = w;
6174
6175            if (hintBoring == UNKNOWN_BORING) {
6176                hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mTextDir,
6177                                                   mHintBoring);
6178                if (hintBoring != null) {
6179                    mHintBoring = hintBoring;
6180                }
6181            }
6182
6183            if (hintBoring != null) {
6184                if (hintBoring.width <= hintWidth &&
6185                    (!shouldEllipsize || hintBoring.width <= ellipsisWidth)) {
6186                    if (mSavedHintLayout != null) {
6187                        mHintLayout = mSavedHintLayout.
6188                                replaceOrMake(mHint, mTextPaint,
6189                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6190                                hintBoring, mIncludePad);
6191                    } else {
6192                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6193                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6194                                hintBoring, mIncludePad);
6195                    }
6196
6197                    mSavedHintLayout = (BoringLayout) mHintLayout;
6198                } else if (shouldEllipsize && hintBoring.width <= hintWidth) {
6199                    if (mSavedHintLayout != null) {
6200                        mHintLayout = mSavedHintLayout.
6201                                replaceOrMake(mHint, mTextPaint,
6202                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6203                                hintBoring, mIncludePad, mEllipsize,
6204                                ellipsisWidth);
6205                    } else {
6206                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6207                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6208                                hintBoring, mIncludePad, mEllipsize,
6209                                ellipsisWidth);
6210                    }
6211                } else if (shouldEllipsize) {
6212                    mHintLayout = new StaticLayout(mHint,
6213                                0, mHint.length(),
6214                                mTextPaint, hintWidth, alignment, mTextDir, mSpacingMult,
6215                                mSpacingAdd, mIncludePad, mEllipsize,
6216                                ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6217                } else {
6218                    mHintLayout = new StaticLayout(mHint, mTextPaint,
6219                            hintWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6220                            mIncludePad);
6221                }
6222            } else if (shouldEllipsize) {
6223                mHintLayout = new StaticLayout(mHint,
6224                            0, mHint.length(),
6225                            mTextPaint, hintWidth, alignment, mTextDir, mSpacingMult,
6226                            mSpacingAdd, mIncludePad, mEllipsize,
6227                            ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6228            } else {
6229                mHintLayout = new StaticLayout(mHint, mTextPaint,
6230                        hintWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6231                        mIncludePad);
6232            }
6233        }
6234
6235        if (bringIntoView) {
6236            registerForPreDraw();
6237        }
6238
6239        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6240            if (!compressText(ellipsisWidth)) {
6241                final int height = mLayoutParams.height;
6242                // If the size of the view does not depend on the size of the text, try to
6243                // start the marquee immediately
6244                if (height != LayoutParams.WRAP_CONTENT && height != LayoutParams.MATCH_PARENT) {
6245                    startMarquee();
6246                } else {
6247                    // Defer the start of the marquee until we know our width (see setFrame())
6248                    mRestartMarquee = true;
6249                }
6250            }
6251        }
6252
6253        // CursorControllers need a non-null mLayout
6254        prepareCursorControllers();
6255    }
6256
6257    private Layout makeSingleLayout(int w, BoringLayout.Metrics boring, int ellipsisWidth,
6258            Layout.Alignment alignment, boolean shouldEllipsize, TruncateAt effectiveEllipsize,
6259            boolean useSaved) {
6260        Layout result = null;
6261        if (mText instanceof Spannable) {
6262            result = new DynamicLayout(mText, mTransformed, mTextPaint, w,
6263                    alignment, mTextDir, mSpacingMult,
6264                    mSpacingAdd, mIncludePad, mInput == null ? effectiveEllipsize : null,
6265                            ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6266        } else {
6267            if (boring == UNKNOWN_BORING) {
6268                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
6269                if (boring != null) {
6270                    mBoring = boring;
6271                }
6272            }
6273
6274            if (boring != null) {
6275                if (boring.width <= w &&
6276                        (effectiveEllipsize == null || boring.width <= ellipsisWidth)) {
6277                    if (useSaved && mSavedLayout != null) {
6278                        result = mSavedLayout.replaceOrMake(mTransformed, mTextPaint,
6279                                w, alignment, mSpacingMult, mSpacingAdd,
6280                                boring, mIncludePad);
6281                    } else {
6282                        result = BoringLayout.make(mTransformed, mTextPaint,
6283                                w, alignment, mSpacingMult, mSpacingAdd,
6284                                boring, mIncludePad);
6285                    }
6286
6287                    if (useSaved) {
6288                        mSavedLayout = (BoringLayout) result;
6289                    }
6290                } else if (shouldEllipsize && boring.width <= w) {
6291                    if (useSaved && mSavedLayout != null) {
6292                        result = mSavedLayout.replaceOrMake(mTransformed, mTextPaint,
6293                                w, alignment, mSpacingMult, mSpacingAdd,
6294                                boring, mIncludePad, effectiveEllipsize,
6295                                ellipsisWidth);
6296                    } else {
6297                        result = BoringLayout.make(mTransformed, mTextPaint,
6298                                w, alignment, mSpacingMult, mSpacingAdd,
6299                                boring, mIncludePad, effectiveEllipsize,
6300                                ellipsisWidth);
6301                    }
6302                } else if (shouldEllipsize) {
6303                    result = new StaticLayout(mTransformed,
6304                            0, mTransformed.length(),
6305                            mTextPaint, w, alignment, mTextDir, mSpacingMult,
6306                            mSpacingAdd, mIncludePad, effectiveEllipsize,
6307                            ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6308                } else {
6309                    result = new StaticLayout(mTransformed, mTextPaint,
6310                            w, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6311                            mIncludePad);
6312                }
6313            } else if (shouldEllipsize) {
6314                result = new StaticLayout(mTransformed,
6315                        0, mTransformed.length(),
6316                        mTextPaint, w, alignment, mTextDir, mSpacingMult,
6317                        mSpacingAdd, mIncludePad, effectiveEllipsize,
6318                        ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6319            } else {
6320                result = new StaticLayout(mTransformed, mTextPaint,
6321                        w, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6322                        mIncludePad);
6323            }
6324        }
6325        return result;
6326    }
6327
6328    private boolean compressText(float width) {
6329        if (isHardwareAccelerated()) return false;
6330
6331        // Only compress the text if it hasn't been compressed by the previous pass
6332        if (width > 0.0f && mLayout != null && getLineCount() == 1 && !mUserSetTextScaleX &&
6333                mTextPaint.getTextScaleX() == 1.0f) {
6334            final float textWidth = mLayout.getLineWidth(0);
6335            final float overflow = (textWidth + 1.0f - width) / width;
6336            if (overflow > 0.0f && overflow <= Marquee.MARQUEE_DELTA_MAX) {
6337                mTextPaint.setTextScaleX(1.0f - overflow - 0.005f);
6338                post(new Runnable() {
6339                    public void run() {
6340                        requestLayout();
6341                    }
6342                });
6343                return true;
6344            }
6345        }
6346
6347        return false;
6348    }
6349
6350    private static int desired(Layout layout) {
6351        int n = layout.getLineCount();
6352        CharSequence text = layout.getText();
6353        float max = 0;
6354
6355        // if any line was wrapped, we can't use it.
6356        // but it's ok for the last line not to have a newline
6357
6358        for (int i = 0; i < n - 1; i++) {
6359            if (text.charAt(layout.getLineEnd(i) - 1) != '\n')
6360                return -1;
6361        }
6362
6363        for (int i = 0; i < n; i++) {
6364            max = Math.max(max, layout.getLineWidth(i));
6365        }
6366
6367        return (int) FloatMath.ceil(max);
6368    }
6369
6370    /**
6371     * Set whether the TextView includes extra top and bottom padding to make
6372     * room for accents that go above the normal ascent and descent.
6373     * The default is true.
6374     *
6375     * @attr ref android.R.styleable#TextView_includeFontPadding
6376     */
6377    public void setIncludeFontPadding(boolean includepad) {
6378        if (mIncludePad != includepad) {
6379            mIncludePad = includepad;
6380
6381            if (mLayout != null) {
6382                nullLayouts();
6383                requestLayout();
6384                invalidate();
6385            }
6386        }
6387    }
6388
6389    private static final BoringLayout.Metrics UNKNOWN_BORING = new BoringLayout.Metrics();
6390
6391    @Override
6392    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
6393        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
6394        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
6395        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
6396        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
6397
6398        int width;
6399        int height;
6400
6401        BoringLayout.Metrics boring = UNKNOWN_BORING;
6402        BoringLayout.Metrics hintBoring = UNKNOWN_BORING;
6403
6404        if (mTextDir == null) {
6405            resolveTextDirection();
6406        }
6407
6408        int des = -1;
6409        boolean fromexisting = false;
6410
6411        if (widthMode == MeasureSpec.EXACTLY) {
6412            // Parent has told us how big to be. So be it.
6413            width = widthSize;
6414        } else {
6415            if (mLayout != null && mEllipsize == null) {
6416                des = desired(mLayout);
6417            }
6418
6419            if (des < 0) {
6420                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
6421                if (boring != null) {
6422                    mBoring = boring;
6423                }
6424            } else {
6425                fromexisting = true;
6426            }
6427
6428            if (boring == null || boring == UNKNOWN_BORING) {
6429                if (des < 0) {
6430                    des = (int) FloatMath.ceil(Layout.getDesiredWidth(mTransformed, mTextPaint));
6431                }
6432
6433                width = des;
6434            } else {
6435                width = boring.width;
6436            }
6437
6438            final Drawables dr = mDrawables;
6439            if (dr != null) {
6440                width = Math.max(width, dr.mDrawableWidthTop);
6441                width = Math.max(width, dr.mDrawableWidthBottom);
6442            }
6443
6444            if (mHint != null) {
6445                int hintDes = -1;
6446                int hintWidth;
6447
6448                if (mHintLayout != null && mEllipsize == null) {
6449                    hintDes = desired(mHintLayout);
6450                }
6451
6452                if (hintDes < 0) {
6453                    hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mHintBoring);
6454                    if (hintBoring != null) {
6455                        mHintBoring = hintBoring;
6456                    }
6457                }
6458
6459                if (hintBoring == null || hintBoring == UNKNOWN_BORING) {
6460                    if (hintDes < 0) {
6461                        hintDes = (int) FloatMath.ceil(
6462                                Layout.getDesiredWidth(mHint, mTextPaint));
6463                    }
6464
6465                    hintWidth = hintDes;
6466                } else {
6467                    hintWidth = hintBoring.width;
6468                }
6469
6470                if (hintWidth > width) {
6471                    width = hintWidth;
6472                }
6473            }
6474
6475            width += getCompoundPaddingLeft() + getCompoundPaddingRight();
6476
6477            if (mMaxWidthMode == EMS) {
6478                width = Math.min(width, mMaxWidth * getLineHeight());
6479            } else {
6480                width = Math.min(width, mMaxWidth);
6481            }
6482
6483            if (mMinWidthMode == EMS) {
6484                width = Math.max(width, mMinWidth * getLineHeight());
6485            } else {
6486                width = Math.max(width, mMinWidth);
6487            }
6488
6489            // Check against our minimum width
6490            width = Math.max(width, getSuggestedMinimumWidth());
6491
6492            if (widthMode == MeasureSpec.AT_MOST) {
6493                width = Math.min(widthSize, width);
6494            }
6495        }
6496
6497        int want = width - getCompoundPaddingLeft() - getCompoundPaddingRight();
6498        int unpaddedWidth = want;
6499
6500        if (mHorizontallyScrolling) want = VERY_WIDE;
6501
6502        int hintWant = want;
6503        int hintWidth = (mHintLayout == null) ? hintWant : mHintLayout.getWidth();
6504
6505        if (mLayout == null) {
6506            makeNewLayout(want, hintWant, boring, hintBoring,
6507                          width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6508        } else {
6509            final boolean layoutChanged = (mLayout.getWidth() != want) ||
6510                    (hintWidth != hintWant) ||
6511                    (mLayout.getEllipsizedWidth() !=
6512                            width - getCompoundPaddingLeft() - getCompoundPaddingRight());
6513
6514            final boolean widthChanged = (mHint == null) &&
6515                    (mEllipsize == null) &&
6516                    (want > mLayout.getWidth()) &&
6517                    (mLayout instanceof BoringLayout || (fromexisting && des >= 0 && des <= want));
6518
6519            final boolean maximumChanged = (mMaxMode != mOldMaxMode) || (mMaximum != mOldMaximum);
6520
6521            if (layoutChanged || maximumChanged) {
6522                if (!maximumChanged && widthChanged) {
6523                    mLayout.increaseWidthTo(want);
6524                } else {
6525                    makeNewLayout(want, hintWant, boring, hintBoring,
6526                            width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6527                }
6528            } else {
6529                // Nothing has changed
6530            }
6531        }
6532
6533        if (heightMode == MeasureSpec.EXACTLY) {
6534            // Parent has told us how big to be. So be it.
6535            height = heightSize;
6536            mDesiredHeightAtMeasure = -1;
6537        } else {
6538            int desired = getDesiredHeight();
6539
6540            height = desired;
6541            mDesiredHeightAtMeasure = desired;
6542
6543            if (heightMode == MeasureSpec.AT_MOST) {
6544                height = Math.min(desired, heightSize);
6545            }
6546        }
6547
6548        int unpaddedHeight = height - getCompoundPaddingTop() - getCompoundPaddingBottom();
6549        if (mMaxMode == LINES && mLayout.getLineCount() > mMaximum) {
6550            unpaddedHeight = Math.min(unpaddedHeight, mLayout.getLineTop(mMaximum));
6551        }
6552
6553        /*
6554         * We didn't let makeNewLayout() register to bring the cursor into view,
6555         * so do it here if there is any possibility that it is needed.
6556         */
6557        if (mMovement != null ||
6558            mLayout.getWidth() > unpaddedWidth ||
6559            mLayout.getHeight() > unpaddedHeight) {
6560            registerForPreDraw();
6561        } else {
6562            scrollTo(0, 0);
6563        }
6564
6565        setMeasuredDimension(width, height);
6566    }
6567
6568    private int getDesiredHeight() {
6569        return Math.max(
6570                getDesiredHeight(mLayout, true),
6571                getDesiredHeight(mHintLayout, mEllipsize != null));
6572    }
6573
6574    private int getDesiredHeight(Layout layout, boolean cap) {
6575        if (layout == null) {
6576            return 0;
6577        }
6578
6579        int linecount = layout.getLineCount();
6580        int pad = getCompoundPaddingTop() + getCompoundPaddingBottom();
6581        int desired = layout.getLineTop(linecount);
6582
6583        final Drawables dr = mDrawables;
6584        if (dr != null) {
6585            desired = Math.max(desired, dr.mDrawableHeightLeft);
6586            desired = Math.max(desired, dr.mDrawableHeightRight);
6587        }
6588
6589        desired += pad;
6590
6591        if (mMaxMode == LINES) {
6592            /*
6593             * Don't cap the hint to a certain number of lines.
6594             * (Do cap it, though, if we have a maximum pixel height.)
6595             */
6596            if (cap) {
6597                if (linecount > mMaximum) {
6598                    desired = layout.getLineTop(mMaximum);
6599
6600                    if (dr != null) {
6601                        desired = Math.max(desired, dr.mDrawableHeightLeft);
6602                        desired = Math.max(desired, dr.mDrawableHeightRight);
6603                    }
6604
6605                    desired += pad;
6606                    linecount = mMaximum;
6607                }
6608            }
6609        } else {
6610            desired = Math.min(desired, mMaximum);
6611        }
6612
6613        if (mMinMode == LINES) {
6614            if (linecount < mMinimum) {
6615                desired += getLineHeight() * (mMinimum - linecount);
6616            }
6617        } else {
6618            desired = Math.max(desired, mMinimum);
6619        }
6620
6621        // Check against our minimum height
6622        desired = Math.max(desired, getSuggestedMinimumHeight());
6623
6624        return desired;
6625    }
6626
6627    /**
6628     * Check whether a change to the existing text layout requires a
6629     * new view layout.
6630     */
6631    private void checkForResize() {
6632        boolean sizeChanged = false;
6633
6634        if (mLayout != null) {
6635            // Check if our width changed
6636            if (mLayoutParams.width == LayoutParams.WRAP_CONTENT) {
6637                sizeChanged = true;
6638                invalidate();
6639            }
6640
6641            // Check if our height changed
6642            if (mLayoutParams.height == LayoutParams.WRAP_CONTENT) {
6643                int desiredHeight = getDesiredHeight();
6644
6645                if (desiredHeight != this.getHeight()) {
6646                    sizeChanged = true;
6647                }
6648            } else if (mLayoutParams.height == LayoutParams.MATCH_PARENT) {
6649                if (mDesiredHeightAtMeasure >= 0) {
6650                    int desiredHeight = getDesiredHeight();
6651
6652                    if (desiredHeight != mDesiredHeightAtMeasure) {
6653                        sizeChanged = true;
6654                    }
6655                }
6656            }
6657        }
6658
6659        if (sizeChanged) {
6660            requestLayout();
6661            // caller will have already invalidated
6662        }
6663    }
6664
6665    /**
6666     * Check whether entirely new text requires a new view layout
6667     * or merely a new text layout.
6668     */
6669    private void checkForRelayout() {
6670        // If we have a fixed width, we can just swap in a new text layout
6671        // if the text height stays the same or if the view height is fixed.
6672
6673        if ((mLayoutParams.width != LayoutParams.WRAP_CONTENT ||
6674                (mMaxWidthMode == mMinWidthMode && mMaxWidth == mMinWidth)) &&
6675                (mHint == null || mHintLayout != null) &&
6676                (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight() > 0)) {
6677            // Static width, so try making a new text layout.
6678
6679            int oldht = mLayout.getHeight();
6680            int want = mLayout.getWidth();
6681            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
6682
6683            /*
6684             * No need to bring the text into view, since the size is not
6685             * changing (unless we do the requestLayout(), in which case it
6686             * will happen at measure).
6687             */
6688            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
6689                          mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight(),
6690                          false);
6691
6692            if (mEllipsize != TextUtils.TruncateAt.MARQUEE) {
6693                // In a fixed-height view, so use our new text layout.
6694                if (mLayoutParams.height != LayoutParams.WRAP_CONTENT &&
6695                    mLayoutParams.height != LayoutParams.MATCH_PARENT) {
6696                    invalidate();
6697                    return;
6698                }
6699
6700                // Dynamic height, but height has stayed the same,
6701                // so use our new text layout.
6702                if (mLayout.getHeight() == oldht &&
6703                    (mHintLayout == null || mHintLayout.getHeight() == oldht)) {
6704                    invalidate();
6705                    return;
6706                }
6707            }
6708
6709            // We lose: the height has changed and we have a dynamic height.
6710            // Request a new view layout using our new text layout.
6711            requestLayout();
6712            invalidate();
6713        } else {
6714            // Dynamic width, so we have no choice but to request a new
6715            // view layout with a new text layout.
6716            nullLayouts();
6717            requestLayout();
6718            invalidate();
6719        }
6720    }
6721
6722    /**
6723     * Returns true if anything changed.
6724     */
6725    private boolean bringTextIntoView() {
6726        int line = 0;
6727        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6728            line = mLayout.getLineCount() - 1;
6729        }
6730
6731        Layout.Alignment a = mLayout.getParagraphAlignment(line);
6732        int dir = mLayout.getParagraphDirection(line);
6733        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6734        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6735        int ht = mLayout.getHeight();
6736
6737        int scrollx, scrolly;
6738
6739        // Convert to left, center, or right alignment.
6740        if (a == Layout.Alignment.ALIGN_NORMAL) {
6741            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_LEFT :
6742                Layout.Alignment.ALIGN_RIGHT;
6743        } else if (a == Layout.Alignment.ALIGN_OPPOSITE){
6744            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_RIGHT :
6745                Layout.Alignment.ALIGN_LEFT;
6746        }
6747
6748        if (a == Layout.Alignment.ALIGN_CENTER) {
6749            /*
6750             * Keep centered if possible, or, if it is too wide to fit,
6751             * keep leading edge in view.
6752             */
6753
6754            int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6755            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6756
6757            if (right - left < hspace) {
6758                scrollx = (right + left) / 2 - hspace / 2;
6759            } else {
6760                if (dir < 0) {
6761                    scrollx = right - hspace;
6762                } else {
6763                    scrollx = left;
6764                }
6765            }
6766        } else if (a == Layout.Alignment.ALIGN_RIGHT) {
6767            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6768            scrollx = right - hspace;
6769        } else { // a == Layout.Alignment.ALIGN_LEFT (will also be the default)
6770            scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
6771        }
6772
6773        if (ht < vspace) {
6774            scrolly = 0;
6775        } else {
6776            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6777                scrolly = ht - vspace;
6778            } else {
6779                scrolly = 0;
6780            }
6781        }
6782
6783        if (scrollx != mScrollX || scrolly != mScrollY) {
6784            scrollTo(scrollx, scrolly);
6785            return true;
6786        } else {
6787            return false;
6788        }
6789    }
6790
6791    /**
6792     * Move the point, specified by the offset, into the view if it is needed.
6793     * This has to be called after layout. Returns true if anything changed.
6794     */
6795    public boolean bringPointIntoView(int offset) {
6796        boolean changed = false;
6797
6798        if (mLayout == null) return changed;
6799
6800        int line = mLayout.getLineForOffset(offset);
6801
6802        // FIXME: Is it okay to truncate this, or should we round?
6803        final int x = (int)mLayout.getPrimaryHorizontal(offset);
6804        final int top = mLayout.getLineTop(line);
6805        final int bottom = mLayout.getLineTop(line + 1);
6806
6807        int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6808        int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6809        int ht = mLayout.getHeight();
6810
6811        int grav;
6812
6813        switch (mLayout.getParagraphAlignment(line)) {
6814            case ALIGN_LEFT:
6815                grav = 1;
6816                break;
6817            case ALIGN_RIGHT:
6818                grav = -1;
6819                break;
6820            case ALIGN_NORMAL:
6821                grav = mLayout.getParagraphDirection(line);
6822                break;
6823            case ALIGN_OPPOSITE:
6824                grav = -mLayout.getParagraphDirection(line);
6825                break;
6826            case ALIGN_CENTER:
6827            default:
6828                grav = 0;
6829                break;
6830        }
6831
6832        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6833        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6834
6835        int hslack = (bottom - top) / 2;
6836        int vslack = hslack;
6837
6838        if (vslack > vspace / 4)
6839            vslack = vspace / 4;
6840        if (hslack > hspace / 4)
6841            hslack = hspace / 4;
6842
6843        int hs = mScrollX;
6844        int vs = mScrollY;
6845
6846        if (top - vs < vslack)
6847            vs = top - vslack;
6848        if (bottom - vs > vspace - vslack)
6849            vs = bottom - (vspace - vslack);
6850        if (ht - vs < vspace)
6851            vs = ht - vspace;
6852        if (0 - vs > 0)
6853            vs = 0;
6854
6855        if (grav != 0) {
6856            if (x - hs < hslack) {
6857                hs = x - hslack;
6858            }
6859            if (x - hs > hspace - hslack) {
6860                hs = x - (hspace - hslack);
6861            }
6862        }
6863
6864        if (grav < 0) {
6865            if (left - hs > 0)
6866                hs = left;
6867            if (right - hs < hspace)
6868                hs = right - hspace;
6869        } else if (grav > 0) {
6870            if (right - hs < hspace)
6871                hs = right - hspace;
6872            if (left - hs > 0)
6873                hs = left;
6874        } else /* grav == 0 */ {
6875            if (right - left <= hspace) {
6876                /*
6877                 * If the entire text fits, center it exactly.
6878                 */
6879                hs = left - (hspace - (right - left)) / 2;
6880            } else if (x > right - hslack) {
6881                /*
6882                 * If we are near the right edge, keep the right edge
6883                 * at the edge of the view.
6884                 */
6885                hs = right - hspace;
6886            } else if (x < left + hslack) {
6887                /*
6888                 * If we are near the left edge, keep the left edge
6889                 * at the edge of the view.
6890                 */
6891                hs = left;
6892            } else if (left > hs) {
6893                /*
6894                 * Is there whitespace visible at the left?  Fix it if so.
6895                 */
6896                hs = left;
6897            } else if (right < hs + hspace) {
6898                /*
6899                 * Is there whitespace visible at the right?  Fix it if so.
6900                 */
6901                hs = right - hspace;
6902            } else {
6903                /*
6904                 * Otherwise, float as needed.
6905                 */
6906                if (x - hs < hslack) {
6907                    hs = x - hslack;
6908                }
6909                if (x - hs > hspace - hslack) {
6910                    hs = x - (hspace - hslack);
6911                }
6912            }
6913        }
6914
6915        if (hs != mScrollX || vs != mScrollY) {
6916            if (mScroller == null) {
6917                scrollTo(hs, vs);
6918            } else {
6919                long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll;
6920                int dx = hs - mScrollX;
6921                int dy = vs - mScrollY;
6922
6923                if (duration > ANIMATED_SCROLL_GAP) {
6924                    mScroller.startScroll(mScrollX, mScrollY, dx, dy);
6925                    awakenScrollBars(mScroller.getDuration());
6926                    invalidate();
6927                } else {
6928                    if (!mScroller.isFinished()) {
6929                        mScroller.abortAnimation();
6930                    }
6931
6932                    scrollBy(dx, dy);
6933                }
6934
6935                mLastScroll = AnimationUtils.currentAnimationTimeMillis();
6936            }
6937
6938            changed = true;
6939        }
6940
6941        if (isFocused()) {
6942            // This offsets because getInterestingRect() is in terms of viewport coordinates, but
6943            // requestRectangleOnScreen() is in terms of content coordinates.
6944
6945            if (mTempRect == null) mTempRect = new Rect();
6946            // The offsets here are to ensure the rectangle we are using is
6947            // within our view bounds, in case the cursor is on the far left
6948            // or right.  If it isn't withing the bounds, then this request
6949            // will be ignored.
6950            mTempRect.set(x - 2, top, x + 2, bottom);
6951            getInterestingRect(mTempRect, line);
6952            mTempRect.offset(mScrollX, mScrollY);
6953
6954            if (requestRectangleOnScreen(mTempRect)) {
6955                changed = true;
6956            }
6957        }
6958
6959        return changed;
6960    }
6961
6962    /**
6963     * Move the cursor, if needed, so that it is at an offset that is visible
6964     * to the user.  This will not move the cursor if it represents more than
6965     * one character (a selection range).  This will only work if the
6966     * TextView contains spannable text; otherwise it will do nothing.
6967     *
6968     * @return True if the cursor was actually moved, false otherwise.
6969     */
6970    public boolean moveCursorToVisibleOffset() {
6971        if (!(mText instanceof Spannable)) {
6972            return false;
6973        }
6974        int start = getSelectionStart();
6975        int end = getSelectionEnd();
6976        if (start != end) {
6977            return false;
6978        }
6979
6980        // First: make sure the line is visible on screen:
6981
6982        int line = mLayout.getLineForOffset(start);
6983
6984        final int top = mLayout.getLineTop(line);
6985        final int bottom = mLayout.getLineTop(line + 1);
6986        final int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6987        int vslack = (bottom - top) / 2;
6988        if (vslack > vspace / 4)
6989            vslack = vspace / 4;
6990        final int vs = mScrollY;
6991
6992        if (top < (vs+vslack)) {
6993            line = mLayout.getLineForVertical(vs+vslack+(bottom-top));
6994        } else if (bottom > (vspace+vs-vslack)) {
6995            line = mLayout.getLineForVertical(vspace+vs-vslack-(bottom-top));
6996        }
6997
6998        // Next: make sure the character is visible on screen:
6999
7000        final int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
7001        final int hs = mScrollX;
7002        final int leftChar = mLayout.getOffsetForHorizontal(line, hs);
7003        final int rightChar = mLayout.getOffsetForHorizontal(line, hspace+hs);
7004
7005        // line might contain bidirectional text
7006        final int lowChar = leftChar < rightChar ? leftChar : rightChar;
7007        final int highChar = leftChar > rightChar ? leftChar : rightChar;
7008
7009        int newStart = start;
7010        if (newStart < lowChar) {
7011            newStart = lowChar;
7012        } else if (newStart > highChar) {
7013            newStart = highChar;
7014        }
7015
7016        if (newStart != start) {
7017            Selection.setSelection((Spannable)mText, newStart);
7018            return true;
7019        }
7020
7021        return false;
7022    }
7023
7024    @Override
7025    public void computeScroll() {
7026        if (mScroller != null) {
7027            if (mScroller.computeScrollOffset()) {
7028                mScrollX = mScroller.getCurrX();
7029                mScrollY = mScroller.getCurrY();
7030                invalidateParentCaches();
7031                postInvalidate();  // So we draw again
7032            }
7033        }
7034    }
7035
7036    private void getInterestingRect(Rect r, int line) {
7037        convertFromViewportToContentCoordinates(r);
7038
7039        // Rectangle can can be expanded on first and last line to take
7040        // padding into account.
7041        // TODO Take left/right padding into account too?
7042        if (line == 0) r.top -= getExtendedPaddingTop();
7043        if (line == mLayout.getLineCount() - 1) r.bottom += getExtendedPaddingBottom();
7044    }
7045
7046    private void convertFromViewportToContentCoordinates(Rect r) {
7047        final int horizontalOffset = viewportToContentHorizontalOffset();
7048        r.left += horizontalOffset;
7049        r.right += horizontalOffset;
7050
7051        final int verticalOffset = viewportToContentVerticalOffset();
7052        r.top += verticalOffset;
7053        r.bottom += verticalOffset;
7054    }
7055
7056    private int viewportToContentHorizontalOffset() {
7057        return getCompoundPaddingLeft() - mScrollX;
7058    }
7059
7060    private int viewportToContentVerticalOffset() {
7061        int offset = getExtendedPaddingTop() - mScrollY;
7062        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
7063            offset += getVerticalOffset(false);
7064        }
7065        return offset;
7066    }
7067
7068    @Override
7069    public void debug(int depth) {
7070        super.debug(depth);
7071
7072        String output = debugIndent(depth);
7073        output += "frame={" + mLeft + ", " + mTop + ", " + mRight
7074                + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY
7075                + "} ";
7076
7077        if (mText != null) {
7078
7079            output += "mText=\"" + mText + "\" ";
7080            if (mLayout != null) {
7081                output += "mLayout width=" + mLayout.getWidth()
7082                        + " height=" + mLayout.getHeight();
7083            }
7084        } else {
7085            output += "mText=NULL";
7086        }
7087        Log.d(VIEW_LOG_TAG, output);
7088    }
7089
7090    /**
7091     * Convenience for {@link Selection#getSelectionStart}.
7092     */
7093    @ViewDebug.ExportedProperty(category = "text")
7094    public int getSelectionStart() {
7095        return Selection.getSelectionStart(getText());
7096    }
7097
7098    /**
7099     * Convenience for {@link Selection#getSelectionEnd}.
7100     */
7101    @ViewDebug.ExportedProperty(category = "text")
7102    public int getSelectionEnd() {
7103        return Selection.getSelectionEnd(getText());
7104    }
7105
7106    /**
7107     * Return true iff there is a selection inside this text view.
7108     */
7109    public boolean hasSelection() {
7110        final int selectionStart = getSelectionStart();
7111        final int selectionEnd = getSelectionEnd();
7112
7113        return selectionStart >= 0 && selectionStart != selectionEnd;
7114    }
7115
7116    /**
7117     * Sets the properties of this field (lines, horizontally scrolling,
7118     * transformation method) to be for a single-line input.
7119     *
7120     * @attr ref android.R.styleable#TextView_singleLine
7121     */
7122    public void setSingleLine() {
7123        setSingleLine(true);
7124    }
7125
7126    /**
7127     * Sets the properties of this field to transform input to ALL CAPS
7128     * display. This may use a "small caps" formatting if available.
7129     * This setting will be ignored if this field is editable or selectable.
7130     *
7131     * This call replaces the current transformation method. Disabling this
7132     * will not necessarily restore the previous behavior from before this
7133     * was enabled.
7134     *
7135     * @see #setTransformationMethod(TransformationMethod)
7136     * @attr ref android.R.styleable#TextView_textAllCaps
7137     */
7138    public void setAllCaps(boolean allCaps) {
7139        if (allCaps) {
7140            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
7141        } else {
7142            setTransformationMethod(null);
7143        }
7144    }
7145
7146    /**
7147     * If true, sets the properties of this field (number of lines, horizontally scrolling,
7148     * transformation method) to be for a single-line input; if false, restores these to the default
7149     * conditions.
7150     *
7151     * Note that the default conditions are not necessarily those that were in effect prior this
7152     * method, and you may want to reset these properties to your custom values.
7153     *
7154     * @attr ref android.R.styleable#TextView_singleLine
7155     */
7156    @android.view.RemotableViewMethod
7157    public void setSingleLine(boolean singleLine) {
7158        // Could be used, but may break backward compatibility.
7159        // if (mSingleLine == singleLine) return;
7160        setInputTypeSingleLine(singleLine);
7161        applySingleLine(singleLine, true, true);
7162    }
7163
7164    /**
7165     * Adds or remove the EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE on the mInputType.
7166     * @param singleLine
7167     */
7168    private void setInputTypeSingleLine(boolean singleLine) {
7169        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
7170            if (singleLine) {
7171                mInputType &= ~EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
7172            } else {
7173                mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
7174            }
7175        }
7176    }
7177
7178    private void applySingleLine(boolean singleLine, boolean applyTransformation,
7179            boolean changeMaxLines) {
7180        mSingleLine = singleLine;
7181        if (singleLine) {
7182            setLines(1);
7183            setHorizontallyScrolling(true);
7184            if (applyTransformation) {
7185                setTransformationMethod(SingleLineTransformationMethod.getInstance());
7186            }
7187        } else {
7188            if (changeMaxLines) {
7189                setMaxLines(Integer.MAX_VALUE);
7190            }
7191            setHorizontallyScrolling(false);
7192            if (applyTransformation) {
7193                setTransformationMethod(null);
7194            }
7195        }
7196    }
7197
7198    /**
7199     * Causes words in the text that are longer than the view is wide
7200     * to be ellipsized instead of broken in the middle.  You may also
7201     * want to {@link #setSingleLine} or {@link #setHorizontallyScrolling}
7202     * to constrain the text to a single line.  Use <code>null</code>
7203     * to turn off ellipsizing.
7204     *
7205     * If {@link #setMaxLines} has been used to set two or more lines,
7206     * {@link android.text.TextUtils.TruncateAt#END} and
7207     * {@link android.text.TextUtils.TruncateAt#MARQUEE}* are only supported
7208     * (other ellipsizing types will not do anything).
7209     *
7210     * @attr ref android.R.styleable#TextView_ellipsize
7211     */
7212    public void setEllipsize(TextUtils.TruncateAt where) {
7213        // TruncateAt is an enum. != comparison is ok between these singleton objects.
7214        if (mEllipsize != where) {
7215            mEllipsize = where;
7216
7217            if (mLayout != null) {
7218                nullLayouts();
7219                requestLayout();
7220                invalidate();
7221            }
7222        }
7223    }
7224
7225    /**
7226     * Sets how many times to repeat the marquee animation. Only applied if the
7227     * TextView has marquee enabled. Set to -1 to repeat indefinitely.
7228     *
7229     * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
7230     */
7231    public void setMarqueeRepeatLimit(int marqueeLimit) {
7232        mMarqueeRepeatLimit = marqueeLimit;
7233    }
7234
7235    /**
7236     * Returns where, if anywhere, words that are longer than the view
7237     * is wide should be ellipsized.
7238     */
7239    @ViewDebug.ExportedProperty
7240    public TextUtils.TruncateAt getEllipsize() {
7241        return mEllipsize;
7242    }
7243
7244    /**
7245     * Set the TextView so that when it takes focus, all the text is
7246     * selected.
7247     *
7248     * @attr ref android.R.styleable#TextView_selectAllOnFocus
7249     */
7250    @android.view.RemotableViewMethod
7251    public void setSelectAllOnFocus(boolean selectAllOnFocus) {
7252        mSelectAllOnFocus = selectAllOnFocus;
7253
7254        if (selectAllOnFocus && !(mText instanceof Spannable)) {
7255            setText(mText, BufferType.SPANNABLE);
7256        }
7257    }
7258
7259    /**
7260     * Set whether the cursor is visible.  The default is true.
7261     *
7262     * @attr ref android.R.styleable#TextView_cursorVisible
7263     */
7264    @android.view.RemotableViewMethod
7265    public void setCursorVisible(boolean visible) {
7266        if (mCursorVisible != visible) {
7267            mCursorVisible = visible;
7268            invalidate();
7269
7270            makeBlink();
7271
7272            // InsertionPointCursorController depends on mCursorVisible
7273            prepareCursorControllers();
7274        }
7275    }
7276
7277    private boolean isCursorVisible() {
7278        return mCursorVisible && isTextEditable();
7279    }
7280
7281    private boolean canMarquee() {
7282        int width = (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight());
7283        return width > 0 && (mLayout.getLineWidth(0) > width ||
7284                (mMarqueeFadeMode != MARQUEE_FADE_NORMAL && mSavedMarqueeModeLayout != null &&
7285                        mSavedMarqueeModeLayout.getLineWidth(0) > width));
7286    }
7287
7288    private void startMarquee() {
7289        // Do not ellipsize EditText
7290        if (mInput != null) return;
7291
7292        if (compressText(getWidth() - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
7293            return;
7294        }
7295
7296        if ((mMarquee == null || mMarquee.isStopped()) && (isFocused() || isSelected()) &&
7297                getLineCount() == 1 && canMarquee()) {
7298
7299            if (mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
7300                mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_FADE;
7301                final Layout tmp = mLayout;
7302                mLayout = mSavedMarqueeModeLayout;
7303                mSavedMarqueeModeLayout = tmp;
7304                setHorizontalFadingEdgeEnabled(true);
7305                requestLayout();
7306                invalidate();
7307            }
7308
7309            if (mMarquee == null) mMarquee = new Marquee(this);
7310            mMarquee.start(mMarqueeRepeatLimit);
7311        }
7312    }
7313
7314    private void stopMarquee() {
7315        if (mMarquee != null && !mMarquee.isStopped()) {
7316            mMarquee.stop();
7317        }
7318
7319        if (mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_FADE) {
7320            mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
7321            final Layout tmp = mSavedMarqueeModeLayout;
7322            mSavedMarqueeModeLayout = mLayout;
7323            mLayout = tmp;
7324            setHorizontalFadingEdgeEnabled(false);
7325            requestLayout();
7326            invalidate();
7327        }
7328    }
7329
7330    private void startStopMarquee(boolean start) {
7331        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7332            if (start) {
7333                startMarquee();
7334            } else {
7335                stopMarquee();
7336            }
7337        }
7338    }
7339
7340    private static final class Marquee extends Handler {
7341        // TODO: Add an option to configure this
7342        private static final float MARQUEE_DELTA_MAX = 0.07f;
7343        private static final int MARQUEE_DELAY = 1200;
7344        private static final int MARQUEE_RESTART_DELAY = 1200;
7345        private static final int MARQUEE_RESOLUTION = 1000 / 30;
7346        private static final int MARQUEE_PIXELS_PER_SECOND = 30;
7347
7348        private static final byte MARQUEE_STOPPED = 0x0;
7349        private static final byte MARQUEE_STARTING = 0x1;
7350        private static final byte MARQUEE_RUNNING = 0x2;
7351
7352        private static final int MESSAGE_START = 0x1;
7353        private static final int MESSAGE_TICK = 0x2;
7354        private static final int MESSAGE_RESTART = 0x3;
7355
7356        private final WeakReference<TextView> mView;
7357
7358        private byte mStatus = MARQUEE_STOPPED;
7359        private final float mScrollUnit;
7360        private float mMaxScroll;
7361        float mMaxFadeScroll;
7362        private float mGhostStart;
7363        private float mGhostOffset;
7364        private float mFadeStop;
7365        private int mRepeatLimit;
7366
7367        float mScroll;
7368
7369        Marquee(TextView v) {
7370            final float density = v.getContext().getResources().getDisplayMetrics().density;
7371            mScrollUnit = (MARQUEE_PIXELS_PER_SECOND * density) / MARQUEE_RESOLUTION;
7372            mView = new WeakReference<TextView>(v);
7373        }
7374
7375        @Override
7376        public void handleMessage(Message msg) {
7377            switch (msg.what) {
7378                case MESSAGE_START:
7379                    mStatus = MARQUEE_RUNNING;
7380                    tick();
7381                    break;
7382                case MESSAGE_TICK:
7383                    tick();
7384                    break;
7385                case MESSAGE_RESTART:
7386                    if (mStatus == MARQUEE_RUNNING) {
7387                        if (mRepeatLimit >= 0) {
7388                            mRepeatLimit--;
7389                        }
7390                        start(mRepeatLimit);
7391                    }
7392                    break;
7393            }
7394        }
7395
7396        void tick() {
7397            if (mStatus != MARQUEE_RUNNING) {
7398                return;
7399            }
7400
7401            removeMessages(MESSAGE_TICK);
7402
7403            final TextView textView = mView.get();
7404            if (textView != null && (textView.isFocused() || textView.isSelected())) {
7405                mScroll += mScrollUnit;
7406                if (mScroll > mMaxScroll) {
7407                    mScroll = mMaxScroll;
7408                    sendEmptyMessageDelayed(MESSAGE_RESTART, MARQUEE_RESTART_DELAY);
7409                } else {
7410                    sendEmptyMessageDelayed(MESSAGE_TICK, MARQUEE_RESOLUTION);
7411                }
7412                textView.invalidate();
7413            }
7414        }
7415
7416        void stop() {
7417            mStatus = MARQUEE_STOPPED;
7418            removeMessages(MESSAGE_START);
7419            removeMessages(MESSAGE_RESTART);
7420            removeMessages(MESSAGE_TICK);
7421            resetScroll();
7422        }
7423
7424        private void resetScroll() {
7425            mScroll = 0.0f;
7426            final TextView textView = mView.get();
7427            if (textView != null) textView.invalidate();
7428        }
7429
7430        void start(int repeatLimit) {
7431            if (repeatLimit == 0) {
7432                stop();
7433                return;
7434            }
7435            mRepeatLimit = repeatLimit;
7436            final TextView textView = mView.get();
7437            if (textView != null && textView.mLayout != null) {
7438                mStatus = MARQUEE_STARTING;
7439                mScroll = 0.0f;
7440                final int textWidth = textView.getWidth() - textView.getCompoundPaddingLeft() -
7441                        textView.getCompoundPaddingRight();
7442                final float lineWidth = textView.mLayout.getLineWidth(0);
7443                final float gap = textWidth / 3.0f;
7444                mGhostStart = lineWidth - textWidth + gap;
7445                mMaxScroll = mGhostStart + textWidth;
7446                mGhostOffset = lineWidth + gap;
7447                mFadeStop = lineWidth + textWidth / 6.0f;
7448                mMaxFadeScroll = mGhostStart + lineWidth + lineWidth;
7449
7450                textView.invalidate();
7451                sendEmptyMessageDelayed(MESSAGE_START, MARQUEE_DELAY);
7452            }
7453        }
7454
7455        float getGhostOffset() {
7456            return mGhostOffset;
7457        }
7458
7459        boolean shouldDrawLeftFade() {
7460            return mScroll <= mFadeStop;
7461        }
7462
7463        boolean shouldDrawGhost() {
7464            return mStatus == MARQUEE_RUNNING && mScroll > mGhostStart;
7465        }
7466
7467        boolean isRunning() {
7468            return mStatus == MARQUEE_RUNNING;
7469        }
7470
7471        boolean isStopped() {
7472            return mStatus == MARQUEE_STOPPED;
7473        }
7474    }
7475
7476    /**
7477     * This method is called when the text is changed, in case any subclasses
7478     * would like to know.
7479     *
7480     * Within <code>text</code>, the <code>lengthAfter</code> characters
7481     * beginning at <code>start</code> have just replaced old text that had
7482     * length <code>lengthBefore</code>. It is an error to attempt to make
7483     * changes to <code>text</code> from this callback.
7484     *
7485     * @param text The text the TextView is displaying
7486     * @param start The offset of the start of the range of the text that was
7487     * modified
7488     * @param lengthBefore The length of the former text that has been replaced
7489     * @param lengthAfter The length of the replacement modified text
7490     */
7491    protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
7492        // intentionally empty, template pattern method can be overridden by subclasses
7493    }
7494
7495    /**
7496     * This method is called when the selection has changed, in case any
7497     * subclasses would like to know.
7498     *
7499     * @param selStart The new selection start location.
7500     * @param selEnd The new selection end location.
7501     */
7502    protected void onSelectionChanged(int selStart, int selEnd) {
7503        sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED);
7504    }
7505
7506    /**
7507     * Adds a TextWatcher to the list of those whose methods are called
7508     * whenever this TextView's text changes.
7509     * <p>
7510     * In 1.0, the {@link TextWatcher#afterTextChanged} method was erroneously
7511     * not called after {@link #setText} calls.  Now, doing {@link #setText}
7512     * if there are any text changed listeners forces the buffer type to
7513     * Editable if it would not otherwise be and does call this method.
7514     */
7515    public void addTextChangedListener(TextWatcher watcher) {
7516        if (mListeners == null) {
7517            mListeners = new ArrayList<TextWatcher>();
7518        }
7519
7520        mListeners.add(watcher);
7521    }
7522
7523    /**
7524     * Removes the specified TextWatcher from the list of those whose
7525     * methods are called
7526     * whenever this TextView's text changes.
7527     */
7528    public void removeTextChangedListener(TextWatcher watcher) {
7529        if (mListeners != null) {
7530            int i = mListeners.indexOf(watcher);
7531
7532            if (i >= 0) {
7533                mListeners.remove(i);
7534            }
7535        }
7536    }
7537
7538    private void sendBeforeTextChanged(CharSequence text, int start, int before, int after) {
7539        if (mListeners != null) {
7540            final ArrayList<TextWatcher> list = mListeners;
7541            final int count = list.size();
7542            for (int i = 0; i < count; i++) {
7543                list.get(i).beforeTextChanged(text, start, before, after);
7544            }
7545        }
7546
7547        // The spans that are inside or intersect the modified region no longer make sense
7548        removeIntersectingSpans(start, start + before, SpellCheckSpan.class);
7549        removeIntersectingSpans(start, start + before, SuggestionSpan.class);
7550    }
7551
7552    // Removes all spans that are inside or actually overlap the start..end range
7553    private <T> void removeIntersectingSpans(int start, int end, Class<T> type) {
7554        if (!(mText instanceof Editable)) return;
7555        Editable text = (Editable) mText;
7556
7557        T[] spans = text.getSpans(start, end, type);
7558        final int length = spans.length;
7559        for (int i = 0; i < length; i++) {
7560            final int s = text.getSpanStart(spans[i]);
7561            final int e = text.getSpanEnd(spans[i]);
7562            // Spans that are adjacent to the edited region will be handled in
7563            // updateSpellCheckSpans. Result depends on what will be added (space or text)
7564            if (e == start || s == end) break;
7565            text.removeSpan(spans[i]);
7566        }
7567    }
7568
7569    /**
7570     * Not private so it can be called from an inner class without going
7571     * through a thunk.
7572     */
7573    void sendOnTextChanged(CharSequence text, int start, int before, int after) {
7574        if (mListeners != null) {
7575            final ArrayList<TextWatcher> list = mListeners;
7576            final int count = list.size();
7577            for (int i = 0; i < count; i++) {
7578                list.get(i).onTextChanged(text, start, before, after);
7579            }
7580        }
7581    }
7582
7583    /**
7584     * Not private so it can be called from an inner class without going
7585     * through a thunk.
7586     */
7587    void sendAfterTextChanged(Editable text) {
7588        if (mListeners != null) {
7589            final ArrayList<TextWatcher> list = mListeners;
7590            final int count = list.size();
7591            for (int i = 0; i < count; i++) {
7592                list.get(i).afterTextChanged(text);
7593            }
7594        }
7595    }
7596
7597    /**
7598     * Not private so it can be called from an inner class without going
7599     * through a thunk.
7600     */
7601    void handleTextChanged(CharSequence buffer, int start, int before, int after) {
7602        final InputMethodState ims = mInputMethodState;
7603        if (ims == null || ims.mBatchEditNesting == 0) {
7604            updateAfterEdit();
7605        }
7606        if (ims != null) {
7607            ims.mContentChanged = true;
7608            if (ims.mChangedStart < 0) {
7609                ims.mChangedStart = start;
7610                ims.mChangedEnd = start+before;
7611            } else {
7612                ims.mChangedStart = Math.min(ims.mChangedStart, start);
7613                ims.mChangedEnd = Math.max(ims.mChangedEnd, start + before - ims.mChangedDelta);
7614            }
7615            ims.mChangedDelta += after-before;
7616        }
7617
7618        sendOnTextChanged(buffer, start, before, after);
7619        onTextChanged(buffer, start, before, after);
7620
7621        updateSpellCheckSpans(start, start + after);
7622
7623        // Hide the controllers if the amount of content changed
7624        if (before != after) {
7625            // We do not hide the span controllers, as they can be added when a new text is
7626            // inserted into the text view
7627            hideCursorControllers();
7628        }
7629    }
7630
7631    /**
7632     * Not private so it can be called from an inner class without going
7633     * through a thunk.
7634     */
7635    void spanChange(Spanned buf, Object what, int oldStart, int newStart, int oldEnd, int newEnd) {
7636        // XXX Make the start and end move together if this ends up
7637        // spending too much time invalidating.
7638
7639        boolean selChanged = false;
7640        int newSelStart=-1, newSelEnd=-1;
7641
7642        final InputMethodState ims = mInputMethodState;
7643
7644        if (what == Selection.SELECTION_END) {
7645            mHighlightPathBogus = true;
7646            selChanged = true;
7647            newSelEnd = newStart;
7648
7649            if (!isFocused()) {
7650                mSelectionMoved = true;
7651            }
7652
7653            if (oldStart >= 0 || newStart >= 0) {
7654                invalidateCursor(Selection.getSelectionStart(buf), oldStart, newStart);
7655                registerForPreDraw();
7656                makeBlink();
7657            }
7658        }
7659
7660        if (what == Selection.SELECTION_START) {
7661            mHighlightPathBogus = true;
7662            selChanged = true;
7663            newSelStart = newStart;
7664
7665            if (!isFocused()) {
7666                mSelectionMoved = true;
7667            }
7668
7669            if (oldStart >= 0 || newStart >= 0) {
7670                int end = Selection.getSelectionEnd(buf);
7671                invalidateCursor(end, oldStart, newStart);
7672            }
7673        }
7674
7675        if (selChanged) {
7676            if ((buf.getSpanFlags(what)&Spanned.SPAN_INTERMEDIATE) == 0) {
7677                if (newSelStart < 0) {
7678                    newSelStart = Selection.getSelectionStart(buf);
7679                }
7680                if (newSelEnd < 0) {
7681                    newSelEnd = Selection.getSelectionEnd(buf);
7682                }
7683                onSelectionChanged(newSelStart, newSelEnd);
7684            }
7685        }
7686
7687        if (what instanceof UpdateAppearance ||
7688            what instanceof ParagraphStyle) {
7689            if (ims == null || ims.mBatchEditNesting == 0) {
7690                invalidate();
7691                mHighlightPathBogus = true;
7692                checkForResize();
7693            } else {
7694                ims.mContentChanged = true;
7695            }
7696        }
7697
7698        if (MetaKeyKeyListener.isMetaTracker(buf, what)) {
7699            mHighlightPathBogus = true;
7700            if (ims != null && MetaKeyKeyListener.isSelectingMetaTracker(buf, what)) {
7701                ims.mSelectionModeChanged = true;
7702            }
7703
7704            if (Selection.getSelectionStart(buf) >= 0) {
7705                if (ims == null || ims.mBatchEditNesting == 0) {
7706                    invalidateCursor();
7707                } else {
7708                    ims.mCursorChanged = true;
7709                }
7710            }
7711        }
7712
7713        if (what instanceof ParcelableSpan) {
7714            // If this is a span that can be sent to a remote process,
7715            // the current extract editor would be interested in it.
7716            if (ims != null && ims.mExtracting != null) {
7717                if (ims.mBatchEditNesting != 0) {
7718                    if (oldStart >= 0) {
7719                        if (ims.mChangedStart > oldStart) {
7720                            ims.mChangedStart = oldStart;
7721                        }
7722                        if (ims.mChangedStart > oldEnd) {
7723                            ims.mChangedStart = oldEnd;
7724                        }
7725                    }
7726                    if (newStart >= 0) {
7727                        if (ims.mChangedStart > newStart) {
7728                            ims.mChangedStart = newStart;
7729                        }
7730                        if (ims.mChangedStart > newEnd) {
7731                            ims.mChangedStart = newEnd;
7732                        }
7733                    }
7734                } else {
7735                    if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Span change outside of batch: "
7736                            + oldStart + "-" + oldEnd + ","
7737                            + newStart + "-" + newEnd + what);
7738                    ims.mContentChanged = true;
7739                }
7740            }
7741        }
7742
7743        if (newStart < 0 && what instanceof SpellCheckSpan) {
7744            getSpellChecker().removeSpellCheckSpan((SpellCheckSpan) what);
7745        }
7746    }
7747
7748    /**
7749     * Create new SpellCheckSpans on the modified region.
7750     */
7751    private void updateSpellCheckSpans(int start, int end) {
7752        if (!isTextEditable() || !isSuggestionsEnabled() || !getSpellChecker().isSessionActive())
7753            return;
7754        Editable text = (Editable) mText;
7755
7756        final int shift = prepareWordIterator(start, end);
7757        final int shiftedStart = start - shift;
7758        final int shiftedEnd = end - shift;
7759
7760        // Move back to the beginning of the current word, if any
7761        int wordStart = mWordIterator.preceding(shiftedStart);
7762        int wordEnd;
7763        if (wordStart == BreakIterator.DONE) {
7764            wordEnd = mWordIterator.following(shiftedStart);
7765            if (wordEnd != BreakIterator.DONE) {
7766                wordStart = mWordIterator.getBeginning(wordEnd);
7767            }
7768        } else {
7769            wordEnd = mWordIterator.getEnd(wordStart);
7770        }
7771        if (wordEnd == BreakIterator.DONE) {
7772            return;
7773        }
7774
7775        // We need to expand by one character because we want to include the spans that end/start
7776        // at position start/end respectively.
7777        SpellCheckSpan[] spellCheckSpans = text.getSpans(start - 1, end + 1, SpellCheckSpan.class);
7778        SuggestionSpan[] suggestionSpans = text.getSpans(start - 1, end + 1, SuggestionSpan.class);
7779        final int numberOfSpellCheckSpans = spellCheckSpans.length;
7780
7781        // Iterate over the newly added text and schedule new SpellCheckSpans
7782        while (wordStart <= shiftedEnd) {
7783            if (wordEnd >= shiftedStart) {
7784                // A new word has been created across the interval boundaries. Remove previous spans
7785                if (wordStart < shiftedStart && wordEnd > shiftedStart) {
7786                    removeSpansAt(start, spellCheckSpans, text);
7787                    removeSpansAt(start, suggestionSpans, text);
7788                }
7789
7790                if (wordStart < shiftedEnd && wordEnd > shiftedEnd) {
7791                    removeSpansAt(end, spellCheckSpans, text);
7792                    removeSpansAt(end, suggestionSpans, text);
7793                }
7794
7795                // Do not create new boundary spans if they already exist
7796                boolean createSpellCheckSpan = true;
7797                if (wordEnd == shiftedStart) {
7798                    for (int i = 0; i < numberOfSpellCheckSpans; i++) {
7799                        final int spanEnd = text.getSpanEnd(spellCheckSpans[i]);
7800                        if (spanEnd == start) {
7801                            createSpellCheckSpan = false;
7802                            break;
7803                        }
7804                    }
7805                }
7806
7807                if (wordStart == shiftedEnd) {
7808                    for (int i = 0; i < numberOfSpellCheckSpans; i++) {
7809                        final int spanStart = text.getSpanStart(spellCheckSpans[i]);
7810                        if (spanStart == end) {
7811                            createSpellCheckSpan = false;
7812                            break;
7813                        }
7814                    }
7815                }
7816
7817                if (createSpellCheckSpan) {
7818                    mSpellChecker.addSpellCheckSpan(wordStart + shift, wordEnd + shift);
7819                }
7820            }
7821
7822            // iterate word by word
7823            wordEnd = mWordIterator.following(wordEnd);
7824            if (wordEnd == BreakIterator.DONE) break;
7825            wordStart = mWordIterator.getBeginning(wordEnd);
7826            if (wordStart == BreakIterator.DONE) {
7827                Log.e(LOG_TAG, "No word beginning from " + (wordEnd + shift) + "in " + mText);
7828                break;
7829            }
7830        }
7831
7832        mSpellChecker.spellCheck();
7833    }
7834
7835    private static <T> void removeSpansAt(int offset, T[] spans, Editable text) {
7836        final int length = spans.length;
7837        for (int i = 0; i < length; i++) {
7838            final T span = spans[i];
7839            final int start = text.getSpanStart(span);
7840            if (start > offset) continue;
7841            final int end = text.getSpanEnd(span);
7842            if (end < offset) continue;
7843            text.removeSpan(span);
7844        }
7845    }
7846
7847    /**
7848     * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related
7849     * pop-up should be displayed.
7850     */
7851    private class EasyEditSpanController {
7852
7853        private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs
7854
7855        private EasyEditPopupWindow mPopupWindow;
7856
7857        private EasyEditSpan mEasyEditSpan;
7858
7859        private Runnable mHidePopup;
7860
7861        private void hide() {
7862            if (mPopupWindow != null) {
7863                mPopupWindow.hide();
7864                TextView.this.removeCallbacks(mHidePopup);
7865            }
7866            removeSpans(mText);
7867            mEasyEditSpan = null;
7868        }
7869
7870        /**
7871         * Monitors the changes in the text.
7872         *
7873         * <p>{@link ChangeWatcher#onSpanAdded(Spannable, Object, int, int)} cannot be used,
7874         * as the notifications are not sent when a spannable (with spans) is inserted.
7875         */
7876        public void onTextChange(CharSequence buffer) {
7877            adjustSpans(mText);
7878
7879            if (getWindowVisibility() != View.VISIBLE) {
7880                // The window is not visible yet, ignore the text change.
7881                return;
7882            }
7883
7884            if (mLayout == null) {
7885                // The view has not been layout yet, ignore the text change
7886                return;
7887            }
7888
7889            InputMethodManager imm = InputMethodManager.peekInstance();
7890            if (!(TextView.this instanceof ExtractEditText)
7891                    && imm != null && imm.isFullscreenMode()) {
7892                // The input is in extract mode. We do not have to handle the easy edit in the
7893                // original TextView, as the ExtractEditText will do
7894                return;
7895            }
7896
7897            // Remove the current easy edit span, as the text changed, and remove the pop-up
7898            // (if any)
7899            if (mEasyEditSpan != null) {
7900                if (mText instanceof Spannable) {
7901                    ((Spannable) mText).removeSpan(mEasyEditSpan);
7902                }
7903                mEasyEditSpan = null;
7904            }
7905            if (mPopupWindow != null && mPopupWindow.isShowing()) {
7906                mPopupWindow.hide();
7907            }
7908
7909            // Display the new easy edit span (if any).
7910            if (buffer instanceof Spanned) {
7911                mEasyEditSpan = getSpan((Spanned) buffer);
7912                if (mEasyEditSpan != null) {
7913                    if (mPopupWindow == null) {
7914                        mPopupWindow = new EasyEditPopupWindow();
7915                        mHidePopup = new Runnable() {
7916                            @Override
7917                            public void run() {
7918                                hide();
7919                            }
7920                        };
7921                    }
7922                    mPopupWindow.show(mEasyEditSpan);
7923                    TextView.this.removeCallbacks(mHidePopup);
7924                    TextView.this.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS);
7925                }
7926            }
7927        }
7928
7929        /**
7930         * Adjusts the spans by removing all of them except the last one.
7931         */
7932        private void adjustSpans(CharSequence buffer) {
7933            // This method enforces that only one easy edit span is attached to the text.
7934            // A better way to enforce this would be to listen for onSpanAdded, but this method
7935            // cannot be used in this scenario as no notification is triggered when a text with
7936            // spans is inserted into a text.
7937            if (buffer instanceof Spannable) {
7938                Spannable spannable = (Spannable) buffer;
7939                EasyEditSpan[] spans = spannable.getSpans(0, spannable.length(),
7940                        EasyEditSpan.class);
7941                for (int i = 0; i < spans.length - 1; i++) {
7942                    spannable.removeSpan(spans[i]);
7943                }
7944            }
7945        }
7946
7947        /**
7948         * Removes all the {@link EasyEditSpan} currently attached.
7949         */
7950        private void removeSpans(CharSequence buffer) {
7951            if (buffer instanceof Spannable) {
7952                Spannable spannable = (Spannable) buffer;
7953                EasyEditSpan[] spans = spannable.getSpans(0, spannable.length(),
7954                        EasyEditSpan.class);
7955                for (int i = 0; i < spans.length; i++) {
7956                    spannable.removeSpan(spans[i]);
7957                }
7958            }
7959        }
7960
7961        private EasyEditSpan getSpan(Spanned spanned) {
7962            EasyEditSpan[] easyEditSpans = spanned.getSpans(0, spanned.length(),
7963                    EasyEditSpan.class);
7964            if (easyEditSpans.length == 0) {
7965                return null;
7966            } else {
7967                return easyEditSpans[0];
7968            }
7969        }
7970    }
7971
7972    /**
7973     * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled
7974     * by {@link EasyEditSpanController}.
7975     */
7976    private class EasyEditPopupWindow extends PinnedPopupWindow
7977            implements OnClickListener {
7978        private static final int POPUP_TEXT_LAYOUT =
7979                com.android.internal.R.layout.text_edit_action_popup_text;
7980        private TextView mDeleteTextView;
7981        private EasyEditSpan mEasyEditSpan;
7982
7983        @Override
7984        protected void createPopupWindow() {
7985            mPopupWindow = new PopupWindow(TextView.this.mContext, null,
7986                    com.android.internal.R.attr.textSelectHandleWindowStyle);
7987            mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
7988            mPopupWindow.setClippingEnabled(true);
7989        }
7990
7991        @Override
7992        protected void initContentView() {
7993            LinearLayout linearLayout = new LinearLayout(TextView.this.getContext());
7994            linearLayout.setOrientation(LinearLayout.HORIZONTAL);
7995            mContentView = linearLayout;
7996            mContentView.setBackgroundResource(
7997                    com.android.internal.R.drawable.text_edit_side_paste_window);
7998
7999            LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
8000                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
8001
8002            LayoutParams wrapContent = new LayoutParams(
8003                    ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
8004
8005            mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
8006            mDeleteTextView.setLayoutParams(wrapContent);
8007            mDeleteTextView.setText(com.android.internal.R.string.delete);
8008            mDeleteTextView.setOnClickListener(this);
8009            mContentView.addView(mDeleteTextView);
8010        }
8011
8012        public void show(EasyEditSpan easyEditSpan) {
8013            mEasyEditSpan = easyEditSpan;
8014            super.show();
8015        }
8016
8017        @Override
8018        public void onClick(View view) {
8019            if (view == mDeleteTextView) {
8020                deleteText();
8021            }
8022        }
8023
8024        private void deleteText() {
8025            Editable editable = (Editable) mText;
8026            int start = editable.getSpanStart(mEasyEditSpan);
8027            int end = editable.getSpanEnd(mEasyEditSpan);
8028            if (start >= 0 && end >= 0) {
8029                editable.delete(start, end);
8030            }
8031        }
8032
8033        @Override
8034        protected int getTextOffset() {
8035            // Place the pop-up at the end of the span
8036            Editable editable = (Editable) mText;
8037            return editable.getSpanEnd(mEasyEditSpan);
8038        }
8039
8040        @Override
8041        protected int getVerticalLocalPosition(int line) {
8042            return mLayout.getLineBottom(line);
8043        }
8044
8045        @Override
8046        protected int clipVertically(int positionY) {
8047            // As we display the pop-up below the span, no vertical clipping is required.
8048            return positionY;
8049        }
8050    }
8051
8052    private class ChangeWatcher implements TextWatcher, SpanWatcher {
8053
8054        private CharSequence mBeforeText;
8055
8056        private EasyEditSpanController mEasyEditSpanController;
8057
8058        private ChangeWatcher() {
8059            mEasyEditSpanController = new EasyEditSpanController();
8060        }
8061
8062        public void beforeTextChanged(CharSequence buffer, int start,
8063                                      int before, int after) {
8064            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "beforeTextChanged start=" + start
8065                    + " before=" + before + " after=" + after + ": " + buffer);
8066
8067            if (AccessibilityManager.getInstance(mContext).isEnabled()
8068                    && !isPasswordInputType(mInputType)
8069                    && !hasPasswordTransformationMethod()) {
8070                mBeforeText = buffer.toString();
8071            }
8072
8073            TextView.this.sendBeforeTextChanged(buffer, start, before, after);
8074        }
8075
8076        public void onTextChanged(CharSequence buffer, int start,
8077                                  int before, int after) {
8078            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onTextChanged start=" + start
8079                    + " before=" + before + " after=" + after + ": " + buffer);
8080            TextView.this.handleTextChanged(buffer, start, before, after);
8081
8082            mEasyEditSpanController.onTextChange(buffer);
8083
8084            if (AccessibilityManager.getInstance(mContext).isEnabled() &&
8085                    (isFocused() || isSelected() && isShown())) {
8086                sendAccessibilityEventTypeViewTextChanged(mBeforeText, start, before, after);
8087                mBeforeText = null;
8088            }
8089        }
8090
8091        public void afterTextChanged(Editable buffer) {
8092            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "afterTextChanged: " + buffer);
8093            TextView.this.sendAfterTextChanged(buffer);
8094
8095            if (MetaKeyKeyListener.getMetaState(buffer, MetaKeyKeyListener.META_SELECTING) != 0) {
8096                MetaKeyKeyListener.stopSelecting(TextView.this, buffer);
8097            }
8098        }
8099
8100        public void onSpanChanged(Spannable buf,
8101                                  Object what, int s, int e, int st, int en) {
8102            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanChanged s=" + s + " e=" + e
8103                    + " st=" + st + " en=" + en + " what=" + what + ": " + buf);
8104            TextView.this.spanChange(buf, what, s, st, e, en);
8105        }
8106
8107        public void onSpanAdded(Spannable buf, Object what, int s, int e) {
8108            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanAdded s=" + s + " e=" + e
8109                    + " what=" + what + ": " + buf);
8110            TextView.this.spanChange(buf, what, -1, s, -1, e);
8111        }
8112
8113        public void onSpanRemoved(Spannable buf, Object what, int s, int e) {
8114            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanRemoved s=" + s + " e=" + e
8115                    + " what=" + what + ": " + buf);
8116            TextView.this.spanChange(buf, what, s, -1, e, -1);
8117        }
8118
8119        private void hideControllers() {
8120            mEasyEditSpanController.hide();
8121        }
8122    }
8123
8124    /**
8125     * @hide
8126     */
8127    @Override
8128    public void dispatchFinishTemporaryDetach() {
8129        mDispatchTemporaryDetach = true;
8130        super.dispatchFinishTemporaryDetach();
8131        mDispatchTemporaryDetach = false;
8132    }
8133
8134    @Override
8135    public void onStartTemporaryDetach() {
8136        super.onStartTemporaryDetach();
8137        // Only track when onStartTemporaryDetach() is called directly,
8138        // usually because this instance is an editable field in a list
8139        if (!mDispatchTemporaryDetach) mTemporaryDetach = true;
8140
8141        // Because of View recycling in ListView, there is no easy way to know when a TextView with
8142        // selection becomes visible again. Until a better solution is found, stop text selection
8143        // mode (if any) as soon as this TextView is recycled.
8144        hideControllers();
8145    }
8146
8147    @Override
8148    public void onFinishTemporaryDetach() {
8149        super.onFinishTemporaryDetach();
8150        // Only track when onStartTemporaryDetach() is called directly,
8151        // usually because this instance is an editable field in a list
8152        if (!mDispatchTemporaryDetach) mTemporaryDetach = false;
8153    }
8154
8155    @Override
8156    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
8157        if (mTemporaryDetach) {
8158            // If we are temporarily in the detach state, then do nothing.
8159            super.onFocusChanged(focused, direction, previouslyFocusedRect);
8160            return;
8161        }
8162
8163        mShowCursor = SystemClock.uptimeMillis();
8164
8165        ensureEndedBatchEdit();
8166
8167        if (focused) {
8168            int selStart = getSelectionStart();
8169            int selEnd = getSelectionEnd();
8170
8171            // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection
8172            // mode for these, unless there was a specific selection already started.
8173            final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 &&
8174                    selEnd == mText.length();
8175            mCreatedWithASelection = mFrozenWithFocus && hasSelection() && !isFocusHighlighted;
8176
8177            if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) {
8178                // If a tap was used to give focus to that view, move cursor at tap position.
8179                // Has to be done before onTakeFocus, which can be overloaded.
8180                final int lastTapPosition = getLastTapPosition();
8181                if (lastTapPosition >= 0) {
8182                    Selection.setSelection((Spannable) mText, lastTapPosition);
8183                }
8184
8185                if (mMovement != null) {
8186                    mMovement.onTakeFocus(this, (Spannable) mText, direction);
8187                }
8188
8189                // The DecorView does not have focus when the 'Done' ExtractEditText button is
8190                // pressed. Since it is the ViewAncestor's mView, it requests focus before
8191                // ExtractEditText clears focus, which gives focus to the ExtractEditText.
8192                // This special case ensure that we keep current selection in that case.
8193                // It would be better to know why the DecorView does not have focus at that time.
8194                if (((this instanceof ExtractEditText) || mSelectionMoved) &&
8195                        selStart >= 0 && selEnd >= 0) {
8196                    /*
8197                     * Someone intentionally set the selection, so let them
8198                     * do whatever it is that they wanted to do instead of
8199                     * the default on-focus behavior.  We reset the selection
8200                     * here instead of just skipping the onTakeFocus() call
8201                     * because some movement methods do something other than
8202                     * just setting the selection in theirs and we still
8203                     * need to go through that path.
8204                     */
8205                    Selection.setSelection((Spannable) mText, selStart, selEnd);
8206                }
8207
8208                if (mSelectAllOnFocus) {
8209                    selectAll();
8210                }
8211
8212                mTouchFocusSelected = true;
8213            }
8214
8215            mFrozenWithFocus = false;
8216            mSelectionMoved = false;
8217
8218            if (mText instanceof Spannable) {
8219                Spannable sp = (Spannable) mText;
8220                MetaKeyKeyListener.resetMetaState(sp);
8221            }
8222
8223            makeBlink();
8224
8225            if (mError != null) {
8226                showError();
8227            }
8228        } else {
8229            if (mError != null) {
8230                hideError();
8231            }
8232            // Don't leave us in the middle of a batch edit.
8233            onEndBatchEdit();
8234
8235            if (this instanceof ExtractEditText) {
8236                // terminateTextSelectionMode removes selection, which we want to keep when
8237                // ExtractEditText goes out of focus.
8238                final int selStart = getSelectionStart();
8239                final int selEnd = getSelectionEnd();
8240                hideControllers();
8241                Selection.setSelection((Spannable) mText, selStart, selEnd);
8242            } else {
8243                hideControllers();
8244                downgradeEasyCorrectionSpans();
8245            }
8246
8247            // No need to create the controller
8248            if (mSelectionModifierCursorController != null) {
8249                mSelectionModifierCursorController.resetTouchOffsets();
8250            }
8251        }
8252
8253        startStopMarquee(focused);
8254
8255        if (mTransformation != null) {
8256            mTransformation.onFocusChanged(this, mText, focused, direction, previouslyFocusedRect);
8257        }
8258
8259        super.onFocusChanged(focused, direction, previouslyFocusedRect);
8260    }
8261
8262    private int getLastTapPosition() {
8263        // No need to create the controller at that point, no last tap position saved
8264        if (mSelectionModifierCursorController != null) {
8265            int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset();
8266            if (lastTapPosition >= 0) {
8267                // Safety check, should not be possible.
8268                if (lastTapPosition > mText.length()) {
8269                    Log.e(LOG_TAG, "Invalid tap focus position (" + lastTapPosition + " vs "
8270                            + mText.length() + ")");
8271                    lastTapPosition = mText.length();
8272                }
8273                return lastTapPosition;
8274            }
8275        }
8276
8277        return -1;
8278    }
8279
8280    @Override
8281    public void onWindowFocusChanged(boolean hasWindowFocus) {
8282        super.onWindowFocusChanged(hasWindowFocus);
8283
8284        if (hasWindowFocus) {
8285            if (mBlink != null) {
8286                mBlink.uncancel();
8287                makeBlink();
8288            }
8289        } else {
8290            if (mBlink != null) {
8291                mBlink.cancel();
8292            }
8293            // Don't leave us in the middle of a batch edit.
8294            onEndBatchEdit();
8295            if (mInputContentType != null) {
8296                mInputContentType.enterDown = false;
8297            }
8298
8299            hideControllers();
8300        }
8301
8302        startStopMarquee(hasWindowFocus);
8303    }
8304
8305    @Override
8306    protected void onVisibilityChanged(View changedView, int visibility) {
8307        super.onVisibilityChanged(changedView, visibility);
8308        if (visibility != VISIBLE) {
8309            hideControllers();
8310        }
8311    }
8312
8313    /**
8314     * Use {@link BaseInputConnection#removeComposingSpans
8315     * BaseInputConnection.removeComposingSpans()} to remove any IME composing
8316     * state from this text view.
8317     */
8318    public void clearComposingText() {
8319        if (mText instanceof Spannable) {
8320            BaseInputConnection.removeComposingSpans((Spannable)mText);
8321        }
8322    }
8323
8324    @Override
8325    public void setSelected(boolean selected) {
8326        boolean wasSelected = isSelected();
8327
8328        super.setSelected(selected);
8329
8330        if (selected != wasSelected && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
8331            if (selected) {
8332                startMarquee();
8333            } else {
8334                stopMarquee();
8335            }
8336        }
8337    }
8338
8339    @Override
8340    public boolean onTouchEvent(MotionEvent event) {
8341        final int action = event.getActionMasked();
8342
8343        if (hasSelectionController()) {
8344            getSelectionController().onTouchEvent(event);
8345        }
8346
8347        if (action == MotionEvent.ACTION_DOWN) {
8348            mLastDownPositionX = event.getX();
8349            mLastDownPositionY = event.getY();
8350
8351            // Reset this state; it will be re-set if super.onTouchEvent
8352            // causes focus to move to the view.
8353            mTouchFocusSelected = false;
8354            mIgnoreActionUpEvent = false;
8355        }
8356
8357        final boolean superResult = super.onTouchEvent(event);
8358
8359        /*
8360         * Don't handle the release after a long press, because it will
8361         * move the selection away from whatever the menu action was
8362         * trying to affect.
8363         */
8364        if (mDiscardNextActionUp && action == MotionEvent.ACTION_UP) {
8365            mDiscardNextActionUp = false;
8366            return superResult;
8367        }
8368
8369        final boolean touchIsFinished = (action == MotionEvent.ACTION_UP) &&
8370                !shouldIgnoreActionUpEvent() && isFocused();
8371
8372         if ((mMovement != null || onCheckIsTextEditor()) && isEnabled()
8373                && mText instanceof Spannable && mLayout != null) {
8374            boolean handled = false;
8375
8376            if (mMovement != null) {
8377                handled |= mMovement.onTouchEvent(this, (Spannable) mText, event);
8378            }
8379
8380            if (touchIsFinished && mLinksClickable && mAutoLinkMask != 0 && mTextIsSelectable) {
8381                // The LinkMovementMethod which should handle taps on links has not been installed
8382                // on non editable text that support text selection.
8383                // We reproduce its behavior here to open links for these.
8384                ClickableSpan[] links = ((Spannable) mText).getSpans(getSelectionStart(),
8385                        getSelectionEnd(), ClickableSpan.class);
8386
8387                if (links.length != 0) {
8388                    links[0].onClick(this);
8389                    handled = true;
8390                }
8391            }
8392
8393            if (touchIsFinished && (isTextEditable() || mTextIsSelectable)) {
8394                // Show the IME, except when selecting in read-only text.
8395                final InputMethodManager imm = InputMethodManager.peekInstance();
8396                viewClicked(imm);
8397                if (!mTextIsSelectable) {
8398                    handled |= imm != null && imm.showSoftInput(this, 0);
8399                }
8400
8401                boolean selectAllGotFocus = mSelectAllOnFocus && didTouchFocusSelect();
8402                hideControllers();
8403                if (!selectAllGotFocus && mText.length() > 0) {
8404                    if (mSpellChecker != null) {
8405                        // When the cursor moves, the word that was typed may need spell check
8406                        mSpellChecker.onSelectionChanged();
8407                    }
8408                    if (isCursorInsideEasyCorrectionSpan()) {
8409                        showSuggestions();
8410                    } else if (hasInsertionController()) {
8411                        getInsertionController().show();
8412                    }
8413                }
8414
8415                handled = true;
8416            }
8417
8418            if (handled) {
8419                return true;
8420            }
8421        }
8422
8423        return superResult;
8424    }
8425
8426    /**
8427     * @return <code>true</code> if the cursor/current selection overlaps a {@link SuggestionSpan}.
8428     */
8429    private boolean isCursorInsideSuggestionSpan() {
8430        if (!(mText instanceof Spannable)) return false;
8431
8432        SuggestionSpan[] suggestionSpans = ((Spannable) mText).getSpans(getSelectionStart(),
8433                getSelectionEnd(), SuggestionSpan.class);
8434        return (suggestionSpans.length > 0);
8435    }
8436
8437    /**
8438     * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with
8439     * {@link SuggestionSpan#FLAG_EASY_CORRECT} set.
8440     */
8441    private boolean isCursorInsideEasyCorrectionSpan() {
8442        Spannable spannable = (Spannable) mText;
8443        SuggestionSpan[] suggestionSpans = spannable.getSpans(getSelectionStart(),
8444                getSelectionEnd(), SuggestionSpan.class);
8445        for (int i = 0; i < suggestionSpans.length; i++) {
8446            if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) {
8447                return true;
8448            }
8449        }
8450        return false;
8451    }
8452
8453    /**
8454     * Downgrades to simple suggestions all the easy correction spans that are not a spell check
8455     * span.
8456     */
8457    private void downgradeEasyCorrectionSpans() {
8458        if (mText instanceof Spannable) {
8459            Spannable spannable = (Spannable) mText;
8460            SuggestionSpan[] suggestionSpans = spannable.getSpans(0,
8461                    spannable.length(), SuggestionSpan.class);
8462            for (int i = 0; i < suggestionSpans.length; i++) {
8463                int flags = suggestionSpans[i].getFlags();
8464                if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0
8465                        && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) {
8466                    flags &= ~SuggestionSpan.FLAG_EASY_CORRECT;
8467                    suggestionSpans[i].setFlags(flags);
8468                }
8469            }
8470        }
8471    }
8472
8473    @Override
8474    public boolean onGenericMotionEvent(MotionEvent event) {
8475        if (mMovement != null && mText instanceof Spannable && mLayout != null) {
8476            try {
8477                if (mMovement.onGenericMotionEvent(this, (Spannable) mText, event)) {
8478                    return true;
8479                }
8480            } catch (AbstractMethodError ex) {
8481                // onGenericMotionEvent was added to the MovementMethod interface in API 12.
8482                // Ignore its absence in case third party applications implemented the
8483                // interface directly.
8484            }
8485        }
8486        return super.onGenericMotionEvent(event);
8487    }
8488
8489    private void prepareCursorControllers() {
8490        boolean windowSupportsHandles = false;
8491
8492        ViewGroup.LayoutParams params = getRootView().getLayoutParams();
8493        if (params instanceof WindowManager.LayoutParams) {
8494            WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params;
8495            windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW
8496                    || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW;
8497        }
8498
8499        mInsertionControllerEnabled = windowSupportsHandles && isCursorVisible() && mLayout != null;
8500        mSelectionControllerEnabled = windowSupportsHandles && textCanBeSelected() &&
8501                mLayout != null;
8502
8503        if (!mInsertionControllerEnabled) {
8504            hideInsertionPointCursorController();
8505            if (mInsertionPointCursorController != null) {
8506                mInsertionPointCursorController.onDetached();
8507                mInsertionPointCursorController = null;
8508            }
8509        }
8510
8511        if (!mSelectionControllerEnabled) {
8512            stopSelectionActionMode();
8513            if (mSelectionModifierCursorController != null) {
8514                mSelectionModifierCursorController.onDetached();
8515                mSelectionModifierCursorController = null;
8516            }
8517        }
8518    }
8519
8520    /**
8521     * @return True iff this TextView contains a text that can be edited, or if this is
8522     * a selectable TextView.
8523     */
8524    private boolean isTextEditable() {
8525        return mText instanceof Editable && onCheckIsTextEditor() && isEnabled();
8526    }
8527
8528    /**
8529     * Returns true, only while processing a touch gesture, if the initial
8530     * touch down event caused focus to move to the text view and as a result
8531     * its selection changed.  Only valid while processing the touch gesture
8532     * of interest.
8533     */
8534    public boolean didTouchFocusSelect() {
8535        return mTouchFocusSelected;
8536    }
8537
8538    @Override
8539    public void cancelLongPress() {
8540        super.cancelLongPress();
8541        mIgnoreActionUpEvent = true;
8542    }
8543
8544    /**
8545     * This method is only valid during a touch event.
8546     *
8547     * @return true when the ACTION_UP event should be ignored, false otherwise.
8548     *
8549     * @hide
8550     */
8551    public boolean shouldIgnoreActionUpEvent() {
8552        return mIgnoreActionUpEvent;
8553    }
8554
8555    @Override
8556    public boolean onTrackballEvent(MotionEvent event) {
8557        if (mMovement != null && mText instanceof Spannable &&
8558            mLayout != null) {
8559            if (mMovement.onTrackballEvent(this, (Spannable) mText, event)) {
8560                return true;
8561            }
8562        }
8563
8564        return super.onTrackballEvent(event);
8565    }
8566
8567    public void setScroller(Scroller s) {
8568        mScroller = s;
8569    }
8570
8571    private static class Blink extends Handler implements Runnable {
8572        private final WeakReference<TextView> mView;
8573        private boolean mCancelled;
8574
8575        public Blink(TextView v) {
8576            mView = new WeakReference<TextView>(v);
8577        }
8578
8579        public void run() {
8580            if (mCancelled) {
8581                return;
8582            }
8583
8584            removeCallbacks(Blink.this);
8585
8586            TextView tv = mView.get();
8587
8588            if (tv != null && tv.shouldBlink()) {
8589                if (tv.mLayout != null) {
8590                    tv.invalidateCursorPath();
8591                }
8592
8593                postAtTime(this, SystemClock.uptimeMillis() + BLINK);
8594            }
8595        }
8596
8597        void cancel() {
8598            if (!mCancelled) {
8599                removeCallbacks(Blink.this);
8600                mCancelled = true;
8601            }
8602        }
8603
8604        void uncancel() {
8605            mCancelled = false;
8606        }
8607    }
8608
8609    /**
8610     * @return True when the TextView isFocused and has a valid zero-length selection (cursor).
8611     */
8612    private boolean shouldBlink() {
8613        if (!isFocused()) return false;
8614
8615        final int start = getSelectionStart();
8616        if (start < 0) return false;
8617
8618        final int end = getSelectionEnd();
8619        if (end < 0) return false;
8620
8621        return start == end;
8622    }
8623
8624    private void makeBlink() {
8625        if (isCursorVisible()) {
8626            if (shouldBlink()) {
8627                mShowCursor = SystemClock.uptimeMillis();
8628                if (mBlink == null) mBlink = new Blink(this);
8629                mBlink.removeCallbacks(mBlink);
8630                mBlink.postAtTime(mBlink, mShowCursor + BLINK);
8631            }
8632        } else {
8633            if (mBlink != null) mBlink.removeCallbacks(mBlink);
8634        }
8635    }
8636
8637    @Override
8638    protected float getLeftFadingEdgeStrength() {
8639        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
8640        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
8641                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
8642            if (mMarquee != null && !mMarquee.isStopped()) {
8643                final Marquee marquee = mMarquee;
8644                if (marquee.shouldDrawLeftFade()) {
8645                    return marquee.mScroll / getHorizontalFadingEdgeLength();
8646                } else {
8647                    return 0.0f;
8648                }
8649            } else if (getLineCount() == 1) {
8650                final int layoutDirection = getResolvedLayoutDirection();
8651                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8652                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8653                    case Gravity.LEFT:
8654                        return 0.0f;
8655                    case Gravity.RIGHT:
8656                        return (mLayout.getLineRight(0) - (mRight - mLeft) -
8657                                getCompoundPaddingLeft() - getCompoundPaddingRight() -
8658                                mLayout.getLineLeft(0)) / getHorizontalFadingEdgeLength();
8659                    case Gravity.CENTER_HORIZONTAL:
8660                        return 0.0f;
8661                }
8662            }
8663        }
8664        return super.getLeftFadingEdgeStrength();
8665    }
8666
8667    @Override
8668    protected float getRightFadingEdgeStrength() {
8669        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
8670        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
8671                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
8672            if (mMarquee != null && !mMarquee.isStopped()) {
8673                final Marquee marquee = mMarquee;
8674                return (marquee.mMaxFadeScroll - marquee.mScroll) / getHorizontalFadingEdgeLength();
8675            } else if (getLineCount() == 1) {
8676                final int layoutDirection = getResolvedLayoutDirection();
8677                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8678                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8679                    case Gravity.LEFT:
8680                        final int textWidth = (mRight - mLeft) - getCompoundPaddingLeft() -
8681                                getCompoundPaddingRight();
8682                        final float lineWidth = mLayout.getLineWidth(0);
8683                        return (lineWidth - textWidth) / getHorizontalFadingEdgeLength();
8684                    case Gravity.RIGHT:
8685                        return 0.0f;
8686                    case Gravity.CENTER_HORIZONTAL:
8687                    case Gravity.FILL_HORIZONTAL:
8688                        return (mLayout.getLineWidth(0) - ((mRight - mLeft) -
8689                                getCompoundPaddingLeft() - getCompoundPaddingRight())) /
8690                                getHorizontalFadingEdgeLength();
8691                }
8692            }
8693        }
8694        return super.getRightFadingEdgeStrength();
8695    }
8696
8697    @Override
8698    protected int computeHorizontalScrollRange() {
8699        if (mLayout != null) {
8700            return mSingleLine && (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) == Gravity.LEFT ?
8701                    (int) mLayout.getLineWidth(0) : mLayout.getWidth();
8702        }
8703
8704        return super.computeHorizontalScrollRange();
8705    }
8706
8707    @Override
8708    protected int computeVerticalScrollRange() {
8709        if (mLayout != null)
8710            return mLayout.getHeight();
8711
8712        return super.computeVerticalScrollRange();
8713    }
8714
8715    @Override
8716    protected int computeVerticalScrollExtent() {
8717        return getHeight() - getCompoundPaddingTop() - getCompoundPaddingBottom();
8718    }
8719
8720    @Override
8721    public void findViewsWithText(ArrayList<View> outViews, CharSequence searched, int flags) {
8722        super.findViewsWithText(outViews, searched, flags);
8723        if (!outViews.contains(this) && (flags & FIND_VIEWS_WITH_TEXT) != 0
8724                && !TextUtils.isEmpty(searched) && !TextUtils.isEmpty(mText)) {
8725            String searchedLowerCase = searched.toString().toLowerCase();
8726            String textLowerCase = mText.toString().toLowerCase();
8727            if (textLowerCase.contains(searchedLowerCase)) {
8728                outViews.add(this);
8729            }
8730        }
8731    }
8732
8733    public enum BufferType {
8734        NORMAL, SPANNABLE, EDITABLE,
8735    }
8736
8737    /**
8738     * Returns the TextView_textColor attribute from the
8739     * Resources.StyledAttributes, if set, or the TextAppearance_textColor
8740     * from the TextView_textAppearance attribute, if TextView_textColor
8741     * was not set directly.
8742     */
8743    public static ColorStateList getTextColors(Context context, TypedArray attrs) {
8744        ColorStateList colors;
8745        colors = attrs.getColorStateList(com.android.internal.R.styleable.
8746                                         TextView_textColor);
8747
8748        if (colors == null) {
8749            int ap = attrs.getResourceId(com.android.internal.R.styleable.
8750                                         TextView_textAppearance, -1);
8751            if (ap != -1) {
8752                TypedArray appearance;
8753                appearance = context.obtainStyledAttributes(ap,
8754                                            com.android.internal.R.styleable.TextAppearance);
8755                colors = appearance.getColorStateList(com.android.internal.R.styleable.
8756                                                  TextAppearance_textColor);
8757                appearance.recycle();
8758            }
8759        }
8760
8761        return colors;
8762    }
8763
8764    /**
8765     * Returns the default color from the TextView_textColor attribute
8766     * from the AttributeSet, if set, or the default color from the
8767     * TextAppearance_textColor from the TextView_textAppearance attribute,
8768     * if TextView_textColor was not set directly.
8769     */
8770    public static int getTextColor(Context context,
8771                                   TypedArray attrs,
8772                                   int def) {
8773        ColorStateList colors = getTextColors(context, attrs);
8774
8775        if (colors == null) {
8776            return def;
8777        } else {
8778            return colors.getDefaultColor();
8779        }
8780    }
8781
8782    @Override
8783    public boolean onKeyShortcut(int keyCode, KeyEvent event) {
8784        final int filteredMetaState = event.getMetaState() & ~KeyEvent.META_CTRL_MASK;
8785        if (KeyEvent.metaStateHasNoModifiers(filteredMetaState)) {
8786            switch (keyCode) {
8787            case KeyEvent.KEYCODE_A:
8788                if (canSelectText()) {
8789                    return onTextContextMenuItem(ID_SELECT_ALL);
8790                }
8791                break;
8792            case KeyEvent.KEYCODE_X:
8793                if (canCut()) {
8794                    return onTextContextMenuItem(ID_CUT);
8795                }
8796                break;
8797            case KeyEvent.KEYCODE_C:
8798                if (canCopy()) {
8799                    return onTextContextMenuItem(ID_COPY);
8800                }
8801                break;
8802            case KeyEvent.KEYCODE_V:
8803                if (canPaste()) {
8804                    return onTextContextMenuItem(ID_PASTE);
8805                }
8806                break;
8807            }
8808        }
8809        return super.onKeyShortcut(keyCode, event);
8810    }
8811
8812    /**
8813     * Unlike {@link #textCanBeSelected()}, this method is based on the <i>current</i> state of the
8814     * TextView. {@link #textCanBeSelected()} has to be true (this is one of the conditions to have
8815     * a selection controller (see {@link #prepareCursorControllers()}), but this is not sufficient.
8816     */
8817    private boolean canSelectText() {
8818        return hasSelectionController() && mText.length() != 0;
8819    }
8820
8821    /**
8822     * Test based on the <i>intrinsic</i> charateristics of the TextView.
8823     * The text must be spannable and the movement method must allow for arbitary selection.
8824     *
8825     * See also {@link #canSelectText()}.
8826     */
8827    private boolean textCanBeSelected() {
8828        // prepareCursorController() relies on this method.
8829        // If you change this condition, make sure prepareCursorController is called anywhere
8830        // the value of this condition might be changed.
8831        if (mMovement == null || !mMovement.canSelectArbitrarily()) return false;
8832        return isTextEditable() || (mTextIsSelectable && mText instanceof Spannable && isEnabled());
8833    }
8834
8835    private boolean canCut() {
8836        if (hasPasswordTransformationMethod()) {
8837            return false;
8838        }
8839
8840        if (mText.length() > 0 && hasSelection() && mText instanceof Editable && mInput != null) {
8841            return true;
8842        }
8843
8844        return false;
8845    }
8846
8847    private boolean canCopy() {
8848        if (hasPasswordTransformationMethod()) {
8849            return false;
8850        }
8851
8852        if (mText.length() > 0 && hasSelection()) {
8853            return true;
8854        }
8855
8856        return false;
8857    }
8858
8859    private boolean canPaste() {
8860        return (mText instanceof Editable &&
8861                mInput != null &&
8862                getSelectionStart() >= 0 &&
8863                getSelectionEnd() >= 0 &&
8864                ((ClipboardManager)getContext().getSystemService(Context.CLIPBOARD_SERVICE)).
8865                hasPrimaryClip());
8866    }
8867
8868    private static long packRangeInLong(int start, int end) {
8869        return (((long) start) << 32) | end;
8870    }
8871
8872    private static int extractRangeStartFromLong(long range) {
8873        return (int) (range >>> 32);
8874    }
8875
8876    private static int extractRangeEndFromLong(long range) {
8877        return (int) (range & 0x00000000FFFFFFFFL);
8878    }
8879
8880    private boolean selectAll() {
8881        final int length = mText.length();
8882        Selection.setSelection((Spannable) mText, 0, length);
8883        return length > 0;
8884    }
8885
8886    /**
8887     * Adjusts selection to the word under last touch offset.
8888     * Return true if the operation was successfully performed.
8889     */
8890    private boolean selectCurrentWord() {
8891        if (!canSelectText()) {
8892            return false;
8893        }
8894
8895        if (hasPasswordTransformationMethod()) {
8896            // Always select all on a password field.
8897            // Cut/copy menu entries are not available for passwords, but being able to select all
8898            // is however useful to delete or paste to replace the entire content.
8899            return selectAll();
8900        }
8901
8902        int klass = mInputType & InputType.TYPE_MASK_CLASS;
8903        int variation = mInputType & InputType.TYPE_MASK_VARIATION;
8904
8905        // Specific text field types: select the entire text for these
8906        if (klass == InputType.TYPE_CLASS_NUMBER ||
8907                klass == InputType.TYPE_CLASS_PHONE ||
8908                klass == InputType.TYPE_CLASS_DATETIME ||
8909                variation == InputType.TYPE_TEXT_VARIATION_URI ||
8910                variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS ||
8911                variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS ||
8912                variation == InputType.TYPE_TEXT_VARIATION_FILTER) {
8913            return selectAll();
8914        }
8915
8916        long lastTouchOffsets = getLastTouchOffsets();
8917        final int minOffset = extractRangeStartFromLong(lastTouchOffsets);
8918        final int maxOffset = extractRangeEndFromLong(lastTouchOffsets);
8919
8920        // Safety check in case standard touch event handling has been bypassed
8921        if (minOffset < 0 || minOffset >= mText.length()) return false;
8922        if (maxOffset < 0 || maxOffset >= mText.length()) return false;
8923
8924        int selectionStart, selectionEnd;
8925
8926        // If a URLSpan (web address, email, phone...) is found at that position, select it.
8927        URLSpan[] urlSpans = ((Spanned) mText).getSpans(minOffset, maxOffset, URLSpan.class);
8928        if (urlSpans.length == 1) {
8929            URLSpan url = urlSpans[0];
8930            selectionStart = ((Spanned) mText).getSpanStart(url);
8931            selectionEnd = ((Spanned) mText).getSpanEnd(url);
8932        } else {
8933            final int shift = prepareWordIterator(minOffset, maxOffset);
8934
8935            selectionStart = mWordIterator.getBeginning(minOffset - shift);
8936            if (selectionStart == BreakIterator.DONE) return false;
8937            selectionStart += shift;
8938
8939            selectionEnd = mWordIterator.getEnd(maxOffset - shift);
8940            if (selectionEnd == BreakIterator.DONE) return false;
8941            selectionEnd += shift;
8942        }
8943
8944        Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
8945        return true;
8946    }
8947
8948    int prepareWordIterator(int start, int end) {
8949        if (mWordIterator == null) {
8950            mWordIterator = new WordIterator();
8951        }
8952
8953        final int windowStart = Math.max(0, start - WORD_ITERATOR_WINDOW_WIDTH);
8954        final int windowEnd = Math.min(mText.length(), end + WORD_ITERATOR_WINDOW_WIDTH);
8955        mWordIterator.setCharSequence(mText.subSequence(windowStart, windowEnd));
8956
8957        return windowStart;
8958    }
8959
8960    private SpellChecker getSpellChecker() {
8961        if (mSpellChecker == null) {
8962            mSpellChecker = new SpellChecker(this);
8963        }
8964        return mSpellChecker;
8965    }
8966
8967    private long getLastTouchOffsets() {
8968        int minOffset, maxOffset;
8969
8970        if (mContextMenuTriggeredByKey) {
8971            minOffset = getSelectionStart();
8972            maxOffset = getSelectionEnd();
8973        } else {
8974            SelectionModifierCursorController selectionController = getSelectionController();
8975            minOffset = selectionController.getMinTouchOffset();
8976            maxOffset = selectionController.getMaxTouchOffset();
8977        }
8978
8979        return packRangeInLong(minOffset, maxOffset);
8980    }
8981
8982    @Override
8983    public void onPopulateAccessibilityEvent(AccessibilityEvent event) {
8984        super.onPopulateAccessibilityEvent(event);
8985
8986        final boolean isPassword = hasPasswordTransformationMethod();
8987        if (!isPassword) {
8988            CharSequence text = getTextForAccessibility();
8989            if (!TextUtils.isEmpty(text)) {
8990                event.getText().add(text);
8991            }
8992        }
8993    }
8994
8995    @Override
8996    public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
8997        super.onInitializeAccessibilityEvent(event);
8998
8999        final boolean isPassword = hasPasswordTransformationMethod();
9000        event.setPassword(isPassword);
9001
9002        if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED) {
9003            event.setFromIndex(Selection.getSelectionStart(mText));
9004            event.setToIndex(Selection.getSelectionEnd(mText));
9005            event.setItemCount(mText.length());
9006        }
9007    }
9008
9009    @Override
9010    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
9011        super.onInitializeAccessibilityNodeInfo(info);
9012
9013        final boolean isPassword = hasPasswordTransformationMethod();
9014        if (!isPassword) {
9015            info.setText(getTextForAccessibility());
9016        }
9017        info.setPassword(isPassword);
9018    }
9019
9020    @Override
9021    public void sendAccessibilityEvent(int eventType) {
9022        // Do not send scroll events since first they are not interesting for
9023        // accessibility and second such events a generated too frequently.
9024        // For details see the implementation of bringTextIntoView().
9025        if (eventType == AccessibilityEvent.TYPE_VIEW_SCROLLED) {
9026            return;
9027        }
9028        super.sendAccessibilityEvent(eventType);
9029    }
9030
9031    /**
9032     * Gets the text reported for accessibility purposes. It is the
9033     * text if not empty or the hint.
9034     *
9035     * @return The accessibility text.
9036     */
9037    private CharSequence getTextForAccessibility() {
9038        CharSequence text = getText();
9039        if (TextUtils.isEmpty(text)) {
9040            text = getHint();
9041        }
9042        return text;
9043    }
9044
9045    void sendAccessibilityEventTypeViewTextChanged(CharSequence beforeText,
9046            int fromIndex, int removedCount, int addedCount) {
9047        AccessibilityEvent event =
9048            AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
9049        event.setFromIndex(fromIndex);
9050        event.setRemovedCount(removedCount);
9051        event.setAddedCount(addedCount);
9052        event.setBeforeText(beforeText);
9053        sendAccessibilityEventUnchecked(event);
9054    }
9055
9056    @Override
9057    protected void onCreateContextMenu(ContextMenu menu) {
9058        super.onCreateContextMenu(menu);
9059        boolean added = false;
9060        mContextMenuTriggeredByKey = mDPadCenterIsDown || mEnterKeyIsDown;
9061        // Problem with context menu on long press: the menu appears while the key in down and when
9062        // the key is released, the view does not receive the key_up event.
9063        // We need two layers of flags: mDPadCenterIsDown and mEnterKeyIsDown are set in key down/up
9064        // events. We cannot simply clear these flags in onTextContextMenuItem since
9065        // it may not be called (if the user/ discards the context menu with the back key).
9066        // We clear these flags here and mContextMenuTriggeredByKey saves that state so that it is
9067        // available in onTextContextMenuItem.
9068        mDPadCenterIsDown = mEnterKeyIsDown = false;
9069
9070        MenuHandler handler = new MenuHandler();
9071
9072        if (mText instanceof Spanned && hasSelectionController()) {
9073            long lastTouchOffset = getLastTouchOffsets();
9074            final int selStart = extractRangeStartFromLong(lastTouchOffset);
9075            final int selEnd = extractRangeEndFromLong(lastTouchOffset);
9076
9077            URLSpan[] urls = ((Spanned) mText).getSpans(selStart, selEnd, URLSpan.class);
9078            if (urls.length > 0) {
9079                menu.add(0, ID_COPY_URL, 0, com.android.internal.R.string.copyUrl).
9080                        setOnMenuItemClickListener(handler);
9081
9082                added = true;
9083            }
9084        }
9085
9086        // The context menu is not empty, which will prevent the selection mode from starting.
9087        // Add a entry to start it in the context menu.
9088        // TODO Does not handle the case where a subclass does not call super.thisMethod or
9089        // populates the menu AFTER this call.
9090        if (menu.size() > 0) {
9091            menu.add(0, ID_SELECTION_MODE, 0, com.android.internal.R.string.selectTextMode).
9092                    setOnMenuItemClickListener(handler);
9093            added = true;
9094        }
9095
9096        if (added) {
9097            menu.setHeaderTitle(com.android.internal.R.string.editTextMenuTitle);
9098        }
9099    }
9100
9101    /**
9102     * Returns whether this text view is a current input method target.  The
9103     * default implementation just checks with {@link InputMethodManager}.
9104     */
9105    public boolean isInputMethodTarget() {
9106        InputMethodManager imm = InputMethodManager.peekInstance();
9107        return imm != null && imm.isActive(this);
9108    }
9109
9110    // Selection context mode
9111    private static final int ID_SELECT_ALL = android.R.id.selectAll;
9112    private static final int ID_CUT = android.R.id.cut;
9113    private static final int ID_COPY = android.R.id.copy;
9114    private static final int ID_PASTE = android.R.id.paste;
9115    // Context menu entries
9116    private static final int ID_COPY_URL = android.R.id.copyUrl;
9117    private static final int ID_SELECTION_MODE = android.R.id.selectTextMode;
9118
9119    private class MenuHandler implements MenuItem.OnMenuItemClickListener {
9120        public boolean onMenuItemClick(MenuItem item) {
9121            return onTextContextMenuItem(item.getItemId());
9122        }
9123    }
9124
9125    /**
9126     * Called when a context menu option for the text view is selected.  Currently
9127     * this will be {@link android.R.id#copyUrl}, {@link android.R.id#selectTextMode},
9128     * {@link android.R.id#selectAll}, {@link android.R.id#paste}, {@link android.R.id#cut}
9129     * or {@link android.R.id#copy}.
9130     *
9131     * @return true if the context menu item action was performed.
9132     */
9133    public boolean onTextContextMenuItem(int id) {
9134        int min = 0;
9135        int max = mText.length();
9136
9137        if (isFocused()) {
9138            final int selStart = getSelectionStart();
9139            final int selEnd = getSelectionEnd();
9140
9141            min = Math.max(0, Math.min(selStart, selEnd));
9142            max = Math.max(0, Math.max(selStart, selEnd));
9143        }
9144
9145        switch (id) {
9146            case ID_COPY_URL:
9147                URLSpan[] urls = ((Spanned) mText).getSpans(min, max, URLSpan.class);
9148                if (urls.length >= 1) {
9149                    ClipData clip = null;
9150                    for (int i=0; i<urls.length; i++) {
9151                        Uri uri = Uri.parse(urls[0].getURL());
9152                        if (clip == null) {
9153                            clip = ClipData.newRawUri(null, uri);
9154                        } else {
9155                            clip.addItem(new ClipData.Item(uri));
9156                        }
9157                    }
9158                    if (clip != null) {
9159                        setPrimaryClip(clip);
9160                    }
9161                }
9162                stopSelectionActionMode();
9163                return true;
9164
9165            case ID_SELECTION_MODE:
9166                if (mSelectionActionMode != null) {
9167                    // Selection mode is already started, simply change selected part.
9168                    selectCurrentWord();
9169                } else {
9170                    startSelectionActionMode();
9171                }
9172                return true;
9173
9174            case ID_SELECT_ALL:
9175                // This does not enter text selection mode. Text is highlighted, so that it can be
9176                // bulk edited, like selectAllOnFocus does. Returns true even if text is empty.
9177                selectAll();
9178                return true;
9179
9180            case ID_PASTE:
9181                paste(min, max);
9182                return true;
9183
9184            case ID_CUT:
9185                setPrimaryClip(ClipData.newPlainText(null, getTransformedText(min, max)));
9186                ((Editable) mText).delete(min, max);
9187                stopSelectionActionMode();
9188                return true;
9189
9190            case ID_COPY:
9191                setPrimaryClip(ClipData.newPlainText(null, getTransformedText(min, max)));
9192                stopSelectionActionMode();
9193                return true;
9194        }
9195        return false;
9196    }
9197
9198    private CharSequence getTransformedText(int start, int end) {
9199        return removeSuggestionSpans(mTransformed.subSequence(start, end));
9200    }
9201
9202    /**
9203     * Prepare text so that there are not zero or two spaces at beginning and end of region defined
9204     * by [min, max] when replacing this region by paste.
9205     * Note that if there were two spaces (or more) at that position before, they are kept. We just
9206     * make sure we do not add an extra one from the paste content.
9207     */
9208    private long prepareSpacesAroundPaste(int min, int max, CharSequence paste) {
9209        if (paste.length() > 0) {
9210            if (min > 0) {
9211                final char charBefore = mTransformed.charAt(min - 1);
9212                final char charAfter = paste.charAt(0);
9213
9214                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
9215                    // Two spaces at beginning of paste: remove one
9216                    final int originalLength = mText.length();
9217                    ((Editable) mText).delete(min - 1, min);
9218                    // Due to filters, there is no guarantee that exactly one character was
9219                    // removed: count instead.
9220                    final int delta = mText.length() - originalLength;
9221                    min += delta;
9222                    max += delta;
9223                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
9224                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
9225                    // No space at beginning of paste: add one
9226                    final int originalLength = mText.length();
9227                    ((Editable) mText).replace(min, min, " ");
9228                    // Taking possible filters into account as above.
9229                    final int delta = mText.length() - originalLength;
9230                    min += delta;
9231                    max += delta;
9232                }
9233            }
9234
9235            if (max < mText.length()) {
9236                final char charBefore = paste.charAt(paste.length() - 1);
9237                final char charAfter = mTransformed.charAt(max);
9238
9239                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
9240                    // Two spaces at end of paste: remove one
9241                    ((Editable) mText).delete(max, max + 1);
9242                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
9243                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
9244                    // No space at end of paste: add one
9245                    ((Editable) mText).replace(max, max, " ");
9246                }
9247            }
9248        }
9249
9250        return packRangeInLong(min, max);
9251    }
9252
9253    private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) {
9254        TextView shadowView = (TextView) inflate(mContext,
9255                com.android.internal.R.layout.text_drag_thumbnail, null);
9256
9257        if (shadowView == null) {
9258            throw new IllegalArgumentException("Unable to inflate text drag thumbnail");
9259        }
9260
9261        if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) {
9262            text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH);
9263        }
9264        shadowView.setText(text);
9265        shadowView.setTextColor(getTextColors());
9266
9267        shadowView.setTextAppearance(mContext, R.styleable.Theme_textAppearanceLarge);
9268        shadowView.setGravity(Gravity.CENTER);
9269
9270        shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
9271                ViewGroup.LayoutParams.WRAP_CONTENT));
9272
9273        final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
9274        shadowView.measure(size, size);
9275
9276        shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight());
9277        shadowView.invalidate();
9278        return new DragShadowBuilder(shadowView);
9279    }
9280
9281    private static class DragLocalState {
9282        public TextView sourceTextView;
9283        public int start, end;
9284
9285        public DragLocalState(TextView sourceTextView, int start, int end) {
9286            this.sourceTextView = sourceTextView;
9287            this.start = start;
9288            this.end = end;
9289        }
9290    }
9291
9292    @Override
9293    public boolean performLongClick() {
9294        boolean handled = false;
9295        boolean vibrate = true;
9296
9297        if (super.performLongClick()) {
9298            mDiscardNextActionUp = true;
9299            handled = true;
9300        }
9301
9302        // Long press in empty space moves cursor and shows the Paste affordance if available.
9303        if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) &&
9304                mInsertionControllerEnabled) {
9305            final int offset = getOffsetForPosition(mLastDownPositionX, mLastDownPositionY);
9306            stopSelectionActionMode();
9307            Selection.setSelection((Spannable) mText, offset);
9308            getInsertionController().showWithActionPopup();
9309            handled = true;
9310            vibrate = false;
9311        }
9312
9313        if (!handled && mSelectionActionMode != null) {
9314            if (touchPositionIsInSelection()) {
9315                // Start a drag
9316                final int start = getSelectionStart();
9317                final int end = getSelectionEnd();
9318                CharSequence selectedText = getTransformedText(start, end);
9319                ClipData data = ClipData.newPlainText(null, selectedText);
9320                DragLocalState localState = new DragLocalState(this, start, end);
9321                startDrag(data, getTextThumbnailBuilder(selectedText), localState, 0);
9322                stopSelectionActionMode();
9323            } else {
9324                getSelectionController().hide();
9325                selectCurrentWord();
9326                getSelectionController().show();
9327            }
9328            handled = true;
9329        }
9330
9331        // Start a new selection
9332        if (!handled) {
9333            handled = startSelectionActionMode();
9334        }
9335
9336        if (vibrate) {
9337            performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
9338        }
9339
9340        if (handled) {
9341            mDiscardNextActionUp = true;
9342        }
9343
9344        return handled;
9345    }
9346
9347    private boolean touchPositionIsInSelection() {
9348        int selectionStart = getSelectionStart();
9349        int selectionEnd = getSelectionEnd();
9350
9351        if (selectionStart == selectionEnd) {
9352            return false;
9353        }
9354
9355        if (selectionStart > selectionEnd) {
9356            int tmp = selectionStart;
9357            selectionStart = selectionEnd;
9358            selectionEnd = tmp;
9359            Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
9360        }
9361
9362        SelectionModifierCursorController selectionController = getSelectionController();
9363        int minOffset = selectionController.getMinTouchOffset();
9364        int maxOffset = selectionController.getMaxTouchOffset();
9365
9366        return ((minOffset >= selectionStart) && (maxOffset < selectionEnd));
9367    }
9368
9369    private PositionListener getPositionListener() {
9370        if (mPositionListener == null) {
9371            mPositionListener = new PositionListener();
9372        }
9373        return mPositionListener;
9374    }
9375
9376    private interface TextViewPositionListener {
9377        public void updatePosition(int parentPositionX, int parentPositionY,
9378                boolean parentPositionChanged, boolean parentScrolled);
9379    }
9380
9381    private class PositionListener implements ViewTreeObserver.OnPreDrawListener {
9382        // 3 handles
9383        // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others)
9384        private final int MAXIMUM_NUMBER_OF_LISTENERS = 6;
9385        private TextViewPositionListener[] mPositionListeners =
9386                new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS];
9387        private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS];
9388        private boolean mPositionHasChanged = true;
9389        // Absolute position of the TextView with respect to its parent window
9390        private int mPositionX, mPositionY;
9391        private int mNumberOfListeners;
9392        private boolean mScrollHasChanged;
9393
9394        public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) {
9395            if (mNumberOfListeners == 0) {
9396                updatePosition();
9397                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
9398                vto.addOnPreDrawListener(this);
9399            }
9400
9401            int emptySlotIndex = -1;
9402            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
9403                TextViewPositionListener listener = mPositionListeners[i];
9404                if (listener == positionListener) {
9405                    return;
9406                } else if (emptySlotIndex < 0 && listener == null) {
9407                    emptySlotIndex = i;
9408                }
9409            }
9410
9411            mPositionListeners[emptySlotIndex] = positionListener;
9412            mCanMove[emptySlotIndex] = canMove;
9413            mNumberOfListeners++;
9414        }
9415
9416        public void removeSubscriber(TextViewPositionListener positionListener) {
9417            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
9418                if (mPositionListeners[i] == positionListener) {
9419                    mPositionListeners[i] = null;
9420                    mNumberOfListeners--;
9421                    break;
9422                }
9423            }
9424
9425            if (mNumberOfListeners == 0) {
9426                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
9427                vto.removeOnPreDrawListener(this);
9428            }
9429        }
9430
9431        public int getPositionX() {
9432            return mPositionX;
9433        }
9434
9435        public int getPositionY() {
9436            return mPositionY;
9437        }
9438
9439        @Override
9440        public boolean onPreDraw() {
9441            updatePosition();
9442
9443            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
9444                if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) {
9445                    TextViewPositionListener positionListener = mPositionListeners[i];
9446                    if (positionListener != null) {
9447                        positionListener.updatePosition(mPositionX, mPositionY,
9448                                mPositionHasChanged, mScrollHasChanged);
9449                    }
9450                }
9451            }
9452
9453            mScrollHasChanged = false;
9454            return true;
9455        }
9456
9457        private void updatePosition() {
9458            TextView.this.getLocationInWindow(mTempCoords);
9459
9460            mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY;
9461
9462            mPositionX = mTempCoords[0];
9463            mPositionY = mTempCoords[1];
9464        }
9465
9466        public boolean isVisible(int positionX, int positionY) {
9467            final TextView textView = TextView.this;
9468
9469            if (mTempRect == null) mTempRect = new Rect();
9470            final Rect clip = mTempRect;
9471            clip.left = getCompoundPaddingLeft();
9472            clip.top = getExtendedPaddingTop();
9473            clip.right = textView.getWidth() - getCompoundPaddingRight();
9474            clip.bottom = textView.getHeight() - getExtendedPaddingBottom();
9475
9476            final ViewParent parent = textView.getParent();
9477            if (parent == null || !parent.getChildVisibleRect(textView, clip, null)) {
9478                return false;
9479            }
9480
9481            int posX = mPositionX + positionX - getScrollX();
9482            int posY = mPositionY + positionY - getScrollY();
9483
9484            // Offset by 1 to take into account 0.5 and int rounding around getPrimaryHorizontal.
9485            return posX >= clip.left - 1 && posX <= clip.right + 1 &&
9486                    posY >= clip.top && posY <= clip.bottom;
9487        }
9488
9489        public boolean isOffsetVisible(int offset) {
9490            final int line = mLayout.getLineForOffset(offset);
9491            final int lineBottom = mLayout.getLineBottom(line);
9492            final int primaryHorizontal = (int) mLayout.getPrimaryHorizontal(offset);
9493            return isVisible(primaryHorizontal, lineBottom);
9494        }
9495
9496        public void onScrollChanged() {
9497            mScrollHasChanged = true;
9498        }
9499    }
9500
9501    @Override
9502    protected void onScrollChanged(int horiz, int vert, int oldHoriz, int oldVert) {
9503        super.onScrollChanged(horiz, vert, oldHoriz, oldVert);
9504        if (mPositionListener != null) {
9505            mPositionListener.onScrollChanged();
9506        }
9507    }
9508
9509    private abstract class PinnedPopupWindow implements TextViewPositionListener {
9510        protected PopupWindow mPopupWindow;
9511        protected ViewGroup mContentView;
9512        int mPositionX, mPositionY;
9513
9514        protected abstract void createPopupWindow();
9515        protected abstract void initContentView();
9516        protected abstract int getTextOffset();
9517        protected abstract int getVerticalLocalPosition(int line);
9518        protected abstract int clipVertically(int positionY);
9519
9520        public PinnedPopupWindow() {
9521            createPopupWindow();
9522
9523            mPopupWindow.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
9524            mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
9525            mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
9526
9527            initContentView();
9528
9529            LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
9530                    ViewGroup.LayoutParams.WRAP_CONTENT);
9531            mContentView.setLayoutParams(wrapContent);
9532
9533            mPopupWindow.setContentView(mContentView);
9534        }
9535
9536        public void show() {
9537            TextView.this.getPositionListener().addSubscriber(this, false /* offset is fixed */);
9538
9539            computeLocalPosition();
9540
9541            final PositionListener positionListener = TextView.this.getPositionListener();
9542            updatePosition(positionListener.getPositionX(), positionListener.getPositionY());
9543        }
9544
9545        protected void measureContent() {
9546            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9547            mContentView.measure(
9548                    View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels,
9549                            View.MeasureSpec.AT_MOST),
9550                    View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels,
9551                            View.MeasureSpec.AT_MOST));
9552        }
9553
9554        /* The popup window will be horizontally centered on the getTextOffset() and vertically
9555         * positioned according to viewportToContentHorizontalOffset.
9556         *
9557         * This method assumes that mContentView has properly been measured from its content. */
9558        private void computeLocalPosition() {
9559            measureContent();
9560            final int width = mContentView.getMeasuredWidth();
9561            final int offset = getTextOffset();
9562            mPositionX = (int) (mLayout.getPrimaryHorizontal(offset) - width / 2.0f);
9563            mPositionX += viewportToContentHorizontalOffset();
9564
9565            final int line = mLayout.getLineForOffset(offset);
9566            mPositionY = getVerticalLocalPosition(line);
9567            mPositionY += viewportToContentVerticalOffset();
9568        }
9569
9570        private void updatePosition(int parentPositionX, int parentPositionY) {
9571            int positionX = parentPositionX + mPositionX;
9572            int positionY = parentPositionY + mPositionY;
9573
9574            positionY = clipVertically(positionY);
9575
9576            // Horizontal clipping
9577            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9578            final int width = mContentView.getMeasuredWidth();
9579            positionX = Math.min(displayMetrics.widthPixels - width, positionX);
9580            positionX = Math.max(0, positionX);
9581
9582            if (isShowing()) {
9583                mPopupWindow.update(positionX, positionY, -1, -1);
9584            } else {
9585                mPopupWindow.showAtLocation(TextView.this, Gravity.NO_GRAVITY,
9586                        positionX, positionY);
9587            }
9588        }
9589
9590        public void hide() {
9591            mPopupWindow.dismiss();
9592            TextView.this.getPositionListener().removeSubscriber(this);
9593        }
9594
9595        @Override
9596        public void updatePosition(int parentPositionX, int parentPositionY,
9597                boolean parentPositionChanged, boolean parentScrolled) {
9598            // Either parentPositionChanged or parentScrolled is true, check if still visible
9599            if (isShowing() && getPositionListener().isOffsetVisible(getTextOffset())) {
9600                if (parentScrolled) computeLocalPosition();
9601                updatePosition(parentPositionX, parentPositionY);
9602            } else {
9603                hide();
9604            }
9605        }
9606
9607        public boolean isShowing() {
9608            return mPopupWindow.isShowing();
9609        }
9610    }
9611
9612    private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener {
9613        private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE;
9614        private static final int ADD_TO_DICTIONARY = -1;
9615        private static final int DELETE_TEXT = -2;
9616        private SuggestionInfo[] mSuggestionInfos;
9617        private int mNumberOfSuggestions;
9618        private boolean mCursorWasVisibleBeforeSuggestions;
9619        private SuggestionAdapter mSuggestionsAdapter;
9620        private final Comparator<SuggestionSpan> mSuggestionSpanComparator;
9621        private final HashMap<SuggestionSpan, Integer> mSpansLengths;
9622
9623        private class CustomPopupWindow extends PopupWindow {
9624            public CustomPopupWindow(Context context, int defStyle) {
9625                super(context, null, defStyle);
9626            }
9627
9628            @Override
9629            public void dismiss() {
9630                super.dismiss();
9631
9632                TextView.this.getPositionListener().removeSubscriber(SuggestionsPopupWindow.this);
9633
9634                // Safe cast since show() checks that mText is an Editable
9635                ((Spannable) mText).removeSpan(mSuggestionRangeSpan);
9636
9637                setCursorVisible(mCursorWasVisibleBeforeSuggestions);
9638                if (hasInsertionController()) {
9639                    getInsertionController().show();
9640                }
9641            }
9642        }
9643
9644        public SuggestionsPopupWindow() {
9645            mCursorWasVisibleBeforeSuggestions = mCursorVisible;
9646            mSuggestionSpanComparator = new SuggestionSpanComparator();
9647            mSpansLengths = new HashMap<SuggestionSpan, Integer>();
9648        }
9649
9650        @Override
9651        protected void createPopupWindow() {
9652            mPopupWindow = new CustomPopupWindow(TextView.this.mContext,
9653                com.android.internal.R.attr.textSuggestionsWindowStyle);
9654            mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
9655            mPopupWindow.setFocusable(true);
9656            mPopupWindow.setClippingEnabled(false);
9657        }
9658
9659        @Override
9660        protected void initContentView() {
9661            ListView listView = new ListView(TextView.this.getContext());
9662            mSuggestionsAdapter = new SuggestionAdapter();
9663            listView.setAdapter(mSuggestionsAdapter);
9664            listView.setOnItemClickListener(this);
9665            mContentView = listView;
9666
9667            // Inflate the suggestion items once and for all. + 2 for add to dictionary and delete
9668            mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS + 2];
9669            for (int i = 0; i < mSuggestionInfos.length; i++) {
9670                mSuggestionInfos[i] = new SuggestionInfo();
9671            }
9672        }
9673
9674        private class SuggestionInfo {
9675            int suggestionStart, suggestionEnd; // range of actual suggestion within text
9676            SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents
9677            int suggestionIndex; // the index of this suggestion inside suggestionSpan
9678            SpannableStringBuilder text = new SpannableStringBuilder();
9679            TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mContext,
9680                    android.R.style.TextAppearance_SuggestionHighlight);
9681
9682            void removeMisspelledFlag() {
9683                int suggestionSpanFlags = suggestionSpan.getFlags();
9684                if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) {
9685                    suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED;
9686                    suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT;
9687                    suggestionSpan.setFlags(suggestionSpanFlags);
9688                }
9689            }
9690        }
9691
9692        private class SuggestionAdapter extends BaseAdapter {
9693            private LayoutInflater mInflater = (LayoutInflater) TextView.this.mContext.
9694                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
9695
9696            @Override
9697            public int getCount() {
9698                return mNumberOfSuggestions;
9699            }
9700
9701            @Override
9702            public Object getItem(int position) {
9703                return mSuggestionInfos[position];
9704            }
9705
9706            @Override
9707            public long getItemId(int position) {
9708                return position;
9709            }
9710
9711            @Override
9712            public View getView(int position, View convertView, ViewGroup parent) {
9713                TextView textView = (TextView) convertView;
9714
9715                if (textView == null) {
9716                    textView = (TextView) mInflater.inflate(mTextEditSuggestionItemLayout, parent,
9717                            false);
9718                }
9719
9720                final SuggestionInfo suggestionInfo = mSuggestionInfos[position];
9721                textView.setText(suggestionInfo.text);
9722
9723                if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) {
9724                    textView.setCompoundDrawablesWithIntrinsicBounds(
9725                            com.android.internal.R.drawable.ic_suggestions_add, 0, 0, 0);
9726                } else if (suggestionInfo.suggestionIndex == DELETE_TEXT) {
9727                    textView.setCompoundDrawablesWithIntrinsicBounds(
9728                            com.android.internal.R.drawable.ic_suggestions_delete, 0, 0, 0);
9729                } else {
9730                    textView.setCompoundDrawables(null, null, null, null);
9731                }
9732
9733                return textView;
9734            }
9735        }
9736
9737        private class SuggestionSpanComparator implements Comparator<SuggestionSpan> {
9738            public int compare(SuggestionSpan span1, SuggestionSpan span2) {
9739                final int flag1 = span1.getFlags();
9740                final int flag2 = span2.getFlags();
9741                if (flag1 != flag2) {
9742                    // The order here should match what is used in updateDrawState
9743                    final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0;
9744                    final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0;
9745                    final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0;
9746                    final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0;
9747                    if (easy1 && !misspelled1) return -1;
9748                    if (easy2 && !misspelled2) return 1;
9749                    if (misspelled1) return -1;
9750                    if (misspelled2) return 1;
9751                }
9752
9753                return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue();
9754            }
9755        }
9756
9757        /**
9758         * Returns the suggestion spans that cover the current cursor position. The suggestion
9759         * spans are sorted according to the length of text that they are attached to.
9760         */
9761        private SuggestionSpan[] getSuggestionSpans() {
9762            int pos = TextView.this.getSelectionStart();
9763            Spannable spannable = (Spannable) TextView.this.mText;
9764            SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class);
9765
9766            mSpansLengths.clear();
9767            for (SuggestionSpan suggestionSpan : suggestionSpans) {
9768                int start = spannable.getSpanStart(suggestionSpan);
9769                int end = spannable.getSpanEnd(suggestionSpan);
9770                mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start));
9771            }
9772
9773            // The suggestions are sorted according to their types (easy correction first, then
9774            // misspelled) and to the length of the text that they cover (shorter first).
9775            Arrays.sort(suggestionSpans, mSuggestionSpanComparator);
9776            return suggestionSpans;
9777        }
9778
9779        @Override
9780        public void show() {
9781            if (!(mText instanceof Editable)) return;
9782
9783            updateSuggestions();
9784            mCursorWasVisibleBeforeSuggestions = mCursorVisible;
9785            setCursorVisible(false);
9786            super.show();
9787        }
9788
9789        @Override
9790        protected void measureContent() {
9791            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9792            final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec(
9793                    displayMetrics.widthPixels, View.MeasureSpec.AT_MOST);
9794            final int verticalMeasure = View.MeasureSpec.makeMeasureSpec(
9795                    displayMetrics.heightPixels, View.MeasureSpec.AT_MOST);
9796
9797            int width = 0;
9798            View view = null;
9799            for (int i = 0; i < mNumberOfSuggestions; i++) {
9800                view = mSuggestionsAdapter.getView(i, view, mContentView);
9801                view.getLayoutParams().width = LayoutParams.WRAP_CONTENT;
9802                view.measure(horizontalMeasure, verticalMeasure);
9803                width = Math.max(width, view.getMeasuredWidth());
9804            }
9805
9806            // Enforce the width based on actual text widths
9807            mContentView.measure(
9808                    View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY),
9809                    verticalMeasure);
9810
9811            Drawable popupBackground = mPopupWindow.getBackground();
9812            if (popupBackground != null) {
9813                if (mTempRect == null) mTempRect = new Rect();
9814                popupBackground.getPadding(mTempRect);
9815                width += mTempRect.left + mTempRect.right;
9816            }
9817            mPopupWindow.setWidth(width);
9818        }
9819
9820        @Override
9821        protected int getTextOffset() {
9822            return getSelectionStart();
9823        }
9824
9825        @Override
9826        protected int getVerticalLocalPosition(int line) {
9827            return mLayout.getLineBottom(line);
9828        }
9829
9830        @Override
9831        protected int clipVertically(int positionY) {
9832            final int height = mContentView.getMeasuredHeight();
9833            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9834            return Math.min(positionY, displayMetrics.heightPixels - height);
9835        }
9836
9837        @Override
9838        public void hide() {
9839            super.hide();
9840        }
9841
9842        private void updateSuggestions() {
9843            Spannable spannable = (Spannable) TextView.this.mText;
9844            SuggestionSpan[] suggestionSpans = getSuggestionSpans();
9845
9846            final int nbSpans = suggestionSpans.length;
9847
9848            mNumberOfSuggestions = 0;
9849            int spanUnionStart = mText.length();
9850            int spanUnionEnd = 0;
9851
9852            SuggestionSpan misspelledSpan = null;
9853            int underlineColor = 0;
9854
9855            for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) {
9856                SuggestionSpan suggestionSpan = suggestionSpans[spanIndex];
9857                final int spanStart = spannable.getSpanStart(suggestionSpan);
9858                final int spanEnd = spannable.getSpanEnd(suggestionSpan);
9859                spanUnionStart = Math.min(spanStart, spanUnionStart);
9860                spanUnionEnd = Math.max(spanEnd, spanUnionEnd);
9861
9862                if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) {
9863                    misspelledSpan = suggestionSpan;
9864                }
9865
9866                // The first span dictates the background color of the highlighted text
9867                if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor();
9868
9869                String[] suggestions = suggestionSpan.getSuggestions();
9870                int nbSuggestions = suggestions.length;
9871                for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) {
9872                    SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions];
9873                    suggestionInfo.suggestionSpan = suggestionSpan;
9874                    suggestionInfo.suggestionIndex = suggestionIndex;
9875                    suggestionInfo.text.replace(0, suggestionInfo.text.length(),
9876                            suggestions[suggestionIndex]);
9877
9878                    mNumberOfSuggestions++;
9879                    if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) {
9880                        // Also end outer for loop
9881                        spanIndex = nbSpans;
9882                        break;
9883                    }
9884                }
9885            }
9886
9887            for (int i = 0; i < mNumberOfSuggestions; i++) {
9888                highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd);
9889            }
9890
9891            // Add to dictionary item is there a span with the misspelled flag
9892            if (misspelledSpan != null) {
9893                final int misspelledStart = spannable.getSpanStart(misspelledSpan);
9894                final int misspelledEnd = spannable.getSpanEnd(misspelledSpan);
9895                if (misspelledStart >= 0 && misspelledEnd > misspelledStart) {
9896                    SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions];
9897                    suggestionInfo.suggestionSpan = misspelledSpan;
9898                    suggestionInfo.suggestionIndex = ADD_TO_DICTIONARY;
9899                    suggestionInfo.text.replace(0, suggestionInfo.text.length(),
9900                            getContext().getString(com.android.internal.R.string.addToDictionary));
9901                    suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0,
9902                            Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9903
9904                    mNumberOfSuggestions++;
9905                }
9906            }
9907
9908            // Delete item
9909            SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions];
9910            suggestionInfo.suggestionSpan = null;
9911            suggestionInfo.suggestionIndex = DELETE_TEXT;
9912            suggestionInfo.text.replace(0, suggestionInfo.text.length(),
9913                    getContext().getString(com.android.internal.R.string.deleteText));
9914            suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0,
9915                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9916            mNumberOfSuggestions++;
9917
9918            if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan();
9919            if (underlineColor == 0) {
9920                // Fallback on the default highlight color when the first span does not provide one
9921                mSuggestionRangeSpan.setBackgroundColor(mHighlightColor);
9922            } else {
9923                final float BACKGROUND_TRANSPARENCY = 0.4f;
9924                final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY);
9925                mSuggestionRangeSpan.setBackgroundColor(
9926                        (underlineColor & 0x00FFFFFF) + (newAlpha << 24));
9927            }
9928            spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd,
9929                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9930
9931            mSuggestionsAdapter.notifyDataSetChanged();
9932        }
9933
9934        private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart,
9935                int unionEnd) {
9936            final Spannable text = (Spannable) mText;
9937            final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan);
9938            final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan);
9939
9940            // Adjust the start/end of the suggestion span
9941            suggestionInfo.suggestionStart = spanStart - unionStart;
9942            suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart
9943                    + suggestionInfo.text.length();
9944
9945            suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0,
9946                    suggestionInfo.text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9947
9948            // Add the text before and after the span.
9949            suggestionInfo.text.insert(0, mText.subSequence(unionStart, spanStart).toString());
9950            suggestionInfo.text.append(mText.subSequence(spanEnd, unionEnd).toString());
9951        }
9952
9953        @Override
9954        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
9955            TextView textView = (TextView) view;
9956            Editable editable = (Editable) mText;
9957
9958            SuggestionInfo suggestionInfo = mSuggestionInfos[position];
9959
9960            if (suggestionInfo.suggestionIndex == DELETE_TEXT) {
9961                final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan);
9962                int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan);
9963                // Do not leave two adjacent spaces after deletion, or one at beginning of text
9964                if (spanUnionEnd < editable.length() &&
9965                        Character.isSpaceChar(editable.charAt(spanUnionEnd)) &&
9966                        (spanUnionStart == 0 ||
9967                        Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) {
9968                        spanUnionEnd = spanUnionEnd + 1;
9969                }
9970                editable.replace(spanUnionStart, spanUnionEnd, "");
9971                hide();
9972                return;
9973            }
9974
9975            final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan);
9976            final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan);
9977            if (spanStart < 0 || spanEnd < 0) {
9978                // Span has been removed
9979                hide();
9980                return;
9981            }
9982            final String originalText = mText.subSequence(spanStart, spanEnd).toString();
9983
9984            if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) {
9985                Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT);
9986                intent.putExtra("word", originalText);
9987                intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK);
9988                getContext().startActivity(intent);
9989                // There is no way to know if the word was indeed added. Re-check.
9990                editable.removeSpan(suggestionInfo.suggestionSpan);
9991                updateSpellCheckSpans(spanStart, spanEnd);
9992            } else {
9993                // SuggestionSpans are removed by replace: save them before
9994                SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd,
9995                        SuggestionSpan.class);
9996                final int length = suggestionSpans.length;
9997                int[] suggestionSpansStarts = new int[length];
9998                int[] suggestionSpansEnds = new int[length];
9999                int[] suggestionSpansFlags = new int[length];
10000                for (int i = 0; i < length; i++) {
10001                    final SuggestionSpan suggestionSpan = suggestionSpans[i];
10002                    suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan);
10003                    suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan);
10004                    suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan);
10005                }
10006
10007                final int suggestionStart = suggestionInfo.suggestionStart;
10008                final int suggestionEnd = suggestionInfo.suggestionEnd;
10009                final String suggestion = textView.getText().subSequence(
10010                        suggestionStart, suggestionEnd).toString();
10011                editable.replace(spanStart, spanEnd, suggestion);
10012
10013                suggestionInfo.removeMisspelledFlag();
10014
10015                // Notify source IME of the suggestion pick. Do this before swaping texts.
10016                if (!TextUtils.isEmpty(
10017                        suggestionInfo.suggestionSpan.getNotificationTargetClassName())) {
10018                    InputMethodManager imm = InputMethodManager.peekInstance();
10019                    imm.notifySuggestionPicked(suggestionInfo.suggestionSpan, originalText,
10020                            suggestionInfo.suggestionIndex);
10021                }
10022
10023                // Swap text content between actual text and Suggestion span
10024                String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions();
10025                suggestions[suggestionInfo.suggestionIndex] = originalText;
10026
10027                // Restore previous SuggestionSpans
10028                final int lengthDifference = suggestion.length() - (spanEnd - spanStart);
10029                for (int i = 0; i < length; i++) {
10030                    // Only spans that include the modified region make sense after replacement
10031                    // Spans partially included in the replaced region are removed, there is no
10032                    // way to assign them a valid range after replacement
10033                    if (suggestionSpansStarts[i] <= spanStart &&
10034                            suggestionSpansEnds[i] >= spanEnd) {
10035                        editable.setSpan(suggestionSpans[i], suggestionSpansStarts[i],
10036                                suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]);
10037                    }
10038                }
10039
10040                // Move cursor at the end of the replacement word
10041                Selection.setSelection(editable, spanEnd + lengthDifference);
10042            }
10043
10044            hide();
10045        }
10046    }
10047
10048    /**
10049     * Removes the suggestion spans.
10050     */
10051    CharSequence removeSuggestionSpans(CharSequence text) {
10052       if (text instanceof Spanned) {
10053           Spannable spannable;
10054           if (text instanceof Spannable) {
10055               spannable = (Spannable) text;
10056           } else {
10057               spannable = new SpannableString(text);
10058               text = spannable;
10059           }
10060
10061           SuggestionSpan[] spans = spannable.getSpans(0, text.length(), SuggestionSpan.class);
10062           for (int i = 0; i < spans.length; i++) {
10063               spannable.removeSpan(spans[i]);
10064           }
10065       }
10066       return text;
10067    }
10068
10069    void showSuggestions() {
10070        if (mSuggestionsPopupWindow == null) {
10071            mSuggestionsPopupWindow = new SuggestionsPopupWindow();
10072        }
10073        hideControllers();
10074        mSuggestionsPopupWindow.show();
10075    }
10076
10077    boolean areSuggestionsShown() {
10078        return mSuggestionsPopupWindow != null && mSuggestionsPopupWindow.isShowing();
10079    }
10080
10081    /**
10082     * Return whether or not suggestions are enabled on this TextView. The suggestions are generated
10083     * by the IME or by the spell checker as the user types. This is done by adding
10084     * {@link SuggestionSpan}s to the text.
10085     *
10086     * When suggestions are enabled (default), this list of suggestions will be displayed when the
10087     * user asks for them on these parts of the text. This value depends on the inputType of this
10088     * TextView.
10089     *
10090     * The class of the input type must be {@link InputType#TYPE_CLASS_TEXT}.
10091     *
10092     * In addition, the type variation must be one of
10093     * {@link InputType#TYPE_TEXT_VARIATION_NORMAL},
10094     * {@link InputType#TYPE_TEXT_VARIATION_EMAIL_SUBJECT},
10095     * {@link InputType#TYPE_TEXT_VARIATION_LONG_MESSAGE},
10096     * {@link InputType#TYPE_TEXT_VARIATION_SHORT_MESSAGE} or
10097     * {@link InputType#TYPE_TEXT_VARIATION_WEB_EDIT_TEXT}.
10098     *
10099     * And finally, the {@link InputType#TYPE_TEXT_FLAG_NO_SUGGESTIONS} flag must <i>not</i> be set.
10100     *
10101     * @return true if the suggestions popup window is enabled, based on the inputType.
10102     */
10103    public boolean isSuggestionsEnabled() {
10104        if ((mInputType & InputType.TYPE_MASK_CLASS) != InputType.TYPE_CLASS_TEXT) return false;
10105        if ((mInputType & InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS) > 0) return false;
10106
10107        final int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
10108        return (variation == EditorInfo.TYPE_TEXT_VARIATION_NORMAL ||
10109                variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT ||
10110                variation == EditorInfo.TYPE_TEXT_VARIATION_LONG_MESSAGE ||
10111                variation == EditorInfo.TYPE_TEXT_VARIATION_SHORT_MESSAGE ||
10112                variation == EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT);
10113    }
10114
10115    /**
10116     * If provided, this ActionMode.Callback will be used to create the ActionMode when text
10117     * selection is initiated in this View.
10118     *
10119     * The standard implementation populates the menu with a subset of Select All, Cut, Copy and
10120     * Paste actions, depending on what this View supports.
10121     *
10122     * A custom implementation can add new entries in the default menu in its
10123     * {@link android.view.ActionMode.Callback#onPrepareActionMode(ActionMode, Menu)} method. The
10124     * default actions can also be removed from the menu using {@link Menu#removeItem(int)} and
10125     * passing {@link android.R.id#selectAll}, {@link android.R.id#cut}, {@link android.R.id#copy}
10126     * or {@link android.R.id#paste} ids as parameters.
10127     *
10128     * Returning false from
10129     * {@link android.view.ActionMode.Callback#onCreateActionMode(ActionMode, Menu)} will prevent
10130     * the action mode from being started.
10131     *
10132     * Action click events should be handled by the custom implementation of
10133     * {@link android.view.ActionMode.Callback#onActionItemClicked(ActionMode, MenuItem)}.
10134     *
10135     * Note that text selection mode is not started when a TextView receives focus and the
10136     * {@link android.R.attr#selectAllOnFocus} flag has been set. The content is highlighted in
10137     * that case, to allow for quick replacement.
10138     */
10139    public void setCustomSelectionActionModeCallback(ActionMode.Callback actionModeCallback) {
10140        mCustomSelectionActionModeCallback = actionModeCallback;
10141    }
10142
10143    /**
10144     * Retrieves the value set in {@link #setCustomSelectionActionModeCallback}. Default is null.
10145     *
10146     * @return The current custom selection callback.
10147     */
10148    public ActionMode.Callback getCustomSelectionActionModeCallback() {
10149        return mCustomSelectionActionModeCallback;
10150    }
10151
10152    /**
10153     *
10154     * @return true if the selection mode was actually started.
10155     */
10156    private boolean startSelectionActionMode() {
10157        if (mSelectionActionMode != null) {
10158            // Selection action mode is already started
10159            return false;
10160        }
10161
10162        if (!canSelectText() || !requestFocus()) {
10163            Log.w(LOG_TAG, "TextView does not support text selection. Action mode cancelled.");
10164            return false;
10165        }
10166
10167        if (!hasSelection()) {
10168            // There may already be a selection on device rotation
10169            boolean currentWordSelected = selectCurrentWord();
10170            if (!currentWordSelected) {
10171                // No word found under cursor or text selection not permitted.
10172                return false;
10173            }
10174        }
10175
10176        final InputMethodManager imm = InputMethodManager.peekInstance();
10177        boolean extractedTextModeWillBeStartedFullScreen = !(this instanceof ExtractEditText) &&
10178                imm != null && imm.isFullscreenMode();
10179
10180        // Do not start the action mode when extracted text will show up full screen, thus
10181        // immediately hiding the newly created action bar, which would be visually distracting.
10182        if (!extractedTextModeWillBeStartedFullScreen) {
10183            ActionMode.Callback actionModeCallback = new SelectionActionModeCallback();
10184            mSelectionActionMode = startActionMode(actionModeCallback);
10185        }
10186        final boolean selectionStarted = mSelectionActionMode != null ||
10187                extractedTextModeWillBeStartedFullScreen;
10188
10189        if (selectionStarted && !mTextIsSelectable && imm != null) {
10190            // Show the IME to be able to replace text, except when selecting non editable text.
10191            imm.showSoftInput(this, 0, null);
10192        }
10193
10194        return selectionStarted;
10195    }
10196
10197    private void stopSelectionActionMode() {
10198        if (mSelectionActionMode != null) {
10199            // This will hide the mSelectionModifierCursorController
10200            mSelectionActionMode.finish();
10201        }
10202    }
10203
10204    /**
10205     * Paste clipboard content between min and max positions.
10206     */
10207    private void paste(int min, int max) {
10208        ClipboardManager clipboard =
10209            (ClipboardManager) getContext().getSystemService(Context.CLIPBOARD_SERVICE);
10210        ClipData clip = clipboard.getPrimaryClip();
10211        if (clip != null) {
10212            boolean didFirst = false;
10213            for (int i=0; i<clip.getItemCount(); i++) {
10214                CharSequence paste = clip.getItemAt(i).coerceToText(getContext());
10215                if (paste != null) {
10216                    if (!didFirst) {
10217                        long minMax = prepareSpacesAroundPaste(min, max, paste);
10218                        min = extractRangeStartFromLong(minMax);
10219                        max = extractRangeEndFromLong(minMax);
10220                        Selection.setSelection((Spannable) mText, max);
10221                        ((Editable) mText).replace(min, max, paste);
10222                        didFirst = true;
10223                    } else {
10224                        ((Editable) mText).insert(getSelectionEnd(), "\n");
10225                        ((Editable) mText).insert(getSelectionEnd(), paste);
10226                    }
10227                }
10228            }
10229            stopSelectionActionMode();
10230            sLastCutOrCopyTime = 0;
10231        }
10232    }
10233
10234    private void setPrimaryClip(ClipData clip) {
10235        ClipboardManager clipboard = (ClipboardManager) getContext().
10236                getSystemService(Context.CLIPBOARD_SERVICE);
10237        clipboard.setPrimaryClip(clip);
10238        sLastCutOrCopyTime = SystemClock.uptimeMillis();
10239    }
10240
10241    /**
10242     * An ActionMode Callback class that is used to provide actions while in text selection mode.
10243     *
10244     * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending
10245     * on which of these this TextView supports.
10246     */
10247    private class SelectionActionModeCallback implements ActionMode.Callback {
10248
10249        @Override
10250        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
10251            TypedArray styledAttributes = mContext.obtainStyledAttributes(
10252                    com.android.internal.R.styleable.SelectionModeDrawables);
10253
10254            boolean allowText = getContext().getResources().getBoolean(
10255                    com.android.internal.R.bool.config_allowActionMenuItemTextWithIcon);
10256
10257            mode.setTitle(allowText ?
10258                    mContext.getString(com.android.internal.R.string.textSelectionCABTitle) : null);
10259            mode.setSubtitle(null);
10260
10261            int selectAllIconId = 0; // No icon by default
10262            if (!allowText) {
10263                // Provide an icon, text will not be displayed on smaller screens.
10264                selectAllIconId = styledAttributes.getResourceId(
10265                        R.styleable.SelectionModeDrawables_actionModeSelectAllDrawable, 0);
10266            }
10267
10268            menu.add(0, ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll).
10269                    setIcon(selectAllIconId).
10270                    setAlphabeticShortcut('a').
10271                    setShowAsAction(
10272                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10273
10274            if (canCut()) {
10275                menu.add(0, ID_CUT, 0, com.android.internal.R.string.cut).
10276                    setIcon(styledAttributes.getResourceId(
10277                            R.styleable.SelectionModeDrawables_actionModeCutDrawable, 0)).
10278                    setAlphabeticShortcut('x').
10279                    setShowAsAction(
10280                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10281            }
10282
10283            if (canCopy()) {
10284                menu.add(0, ID_COPY, 0, com.android.internal.R.string.copy).
10285                    setIcon(styledAttributes.getResourceId(
10286                            R.styleable.SelectionModeDrawables_actionModeCopyDrawable, 0)).
10287                    setAlphabeticShortcut('c').
10288                    setShowAsAction(
10289                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10290            }
10291
10292            if (canPaste()) {
10293                menu.add(0, ID_PASTE, 0, com.android.internal.R.string.paste).
10294                        setIcon(styledAttributes.getResourceId(
10295                                R.styleable.SelectionModeDrawables_actionModePasteDrawable, 0)).
10296                        setAlphabeticShortcut('v').
10297                        setShowAsAction(
10298                                MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10299            }
10300
10301            styledAttributes.recycle();
10302
10303            if (mCustomSelectionActionModeCallback != null) {
10304                if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) {
10305                    // The custom mode can choose to cancel the action mode
10306                    return false;
10307                }
10308            }
10309
10310            if (menu.hasVisibleItems() || mode.getCustomView() != null) {
10311                getSelectionController().show();
10312                return true;
10313            } else {
10314                return false;
10315            }
10316        }
10317
10318        @Override
10319        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
10320            if (mCustomSelectionActionModeCallback != null) {
10321                return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu);
10322            }
10323            return true;
10324        }
10325
10326        @Override
10327        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
10328            if (mCustomSelectionActionModeCallback != null &&
10329                 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) {
10330                return true;
10331            }
10332            return onTextContextMenuItem(item.getItemId());
10333        }
10334
10335        @Override
10336        public void onDestroyActionMode(ActionMode mode) {
10337            if (mCustomSelectionActionModeCallback != null) {
10338                mCustomSelectionActionModeCallback.onDestroyActionMode(mode);
10339            }
10340            Selection.setSelection((Spannable) mText, getSelectionEnd());
10341
10342            if (mSelectionModifierCursorController != null) {
10343                mSelectionModifierCursorController.hide();
10344            }
10345
10346            mSelectionActionMode = null;
10347        }
10348    }
10349
10350    private class ActionPopupWindow extends PinnedPopupWindow implements OnClickListener {
10351        private static final int POPUP_TEXT_LAYOUT =
10352                com.android.internal.R.layout.text_edit_action_popup_text;
10353        private TextView mPasteTextView;
10354        private TextView mReplaceTextView;
10355
10356        @Override
10357        protected void createPopupWindow() {
10358            mPopupWindow = new PopupWindow(TextView.this.mContext, null,
10359                    com.android.internal.R.attr.textSelectHandleWindowStyle);
10360            mPopupWindow.setClippingEnabled(true);
10361        }
10362
10363        @Override
10364        protected void initContentView() {
10365            LinearLayout linearLayout = new LinearLayout(TextView.this.getContext());
10366            linearLayout.setOrientation(LinearLayout.HORIZONTAL);
10367            mContentView = linearLayout;
10368            mContentView.setBackgroundResource(
10369                    com.android.internal.R.drawable.text_edit_paste_window);
10370
10371            LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
10372                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
10373
10374            LayoutParams wrapContent = new LayoutParams(
10375                    ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
10376
10377            mPasteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
10378            mPasteTextView.setLayoutParams(wrapContent);
10379            mContentView.addView(mPasteTextView);
10380            mPasteTextView.setText(com.android.internal.R.string.paste);
10381            mPasteTextView.setOnClickListener(this);
10382
10383            mReplaceTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
10384            mReplaceTextView.setLayoutParams(wrapContent);
10385            mContentView.addView(mReplaceTextView);
10386            mReplaceTextView.setText(com.android.internal.R.string.replace);
10387            mReplaceTextView.setOnClickListener(this);
10388        }
10389
10390        @Override
10391        public void show() {
10392            boolean canPaste = canPaste();
10393            boolean canSuggest = isSuggestionsEnabled() && isCursorInsideSuggestionSpan();
10394            mPasteTextView.setVisibility(canPaste ? View.VISIBLE : View.GONE);
10395            mReplaceTextView.setVisibility(canSuggest ? View.VISIBLE : View.GONE);
10396
10397            if (!canPaste && !canSuggest) return;
10398
10399            super.show();
10400        }
10401
10402        @Override
10403        public void onClick(View view) {
10404            if (view == mPasteTextView && canPaste()) {
10405                onTextContextMenuItem(ID_PASTE);
10406                hide();
10407            } else if (view == mReplaceTextView) {
10408                final int middle = (getSelectionStart() + getSelectionEnd()) / 2;
10409                stopSelectionActionMode();
10410                Selection.setSelection((Spannable) mText, middle);
10411                showSuggestions();
10412            }
10413        }
10414
10415        @Override
10416        protected int getTextOffset() {
10417            return (getSelectionStart() + getSelectionEnd()) / 2;
10418        }
10419
10420        @Override
10421        protected int getVerticalLocalPosition(int line) {
10422            return mLayout.getLineTop(line) - mContentView.getMeasuredHeight();
10423        }
10424
10425        @Override
10426        protected int clipVertically(int positionY) {
10427            if (positionY < 0) {
10428                final int offset = getTextOffset();
10429                final int line = mLayout.getLineForOffset(offset);
10430                positionY += mLayout.getLineBottom(line) - mLayout.getLineTop(line);
10431                positionY += mContentView.getMeasuredHeight();
10432
10433                // Assumes insertion and selection handles share the same height
10434                final Drawable handle = mContext.getResources().getDrawable(mTextSelectHandleRes);
10435                positionY += handle.getIntrinsicHeight();
10436            }
10437
10438            return positionY;
10439        }
10440    }
10441
10442    private abstract class HandleView extends View implements TextViewPositionListener {
10443        protected Drawable mDrawable;
10444        protected Drawable mDrawableLtr;
10445        protected Drawable mDrawableRtl;
10446        private final PopupWindow mContainer;
10447        // Position with respect to the parent TextView
10448        private int mPositionX, mPositionY;
10449        private boolean mIsDragging;
10450        // Offset from touch position to mPosition
10451        private float mTouchToWindowOffsetX, mTouchToWindowOffsetY;
10452        protected int mHotspotX;
10453        // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up
10454        private float mTouchOffsetY;
10455        // Where the touch position should be on the handle to ensure a maximum cursor visibility
10456        private float mIdealVerticalOffset;
10457        // Parent's (TextView) previous position in window
10458        private int mLastParentX, mLastParentY;
10459        // Transient action popup window for Paste and Replace actions
10460        protected ActionPopupWindow mActionPopupWindow;
10461        // Previous text character offset
10462        private int mPreviousOffset = -1;
10463        // Previous text character offset
10464        private boolean mPositionHasChanged = true;
10465        // Used to delay the appearance of the action popup window
10466        private Runnable mActionPopupShower;
10467
10468        public HandleView(Drawable drawableLtr, Drawable drawableRtl) {
10469            super(TextView.this.mContext);
10470            mContainer = new PopupWindow(TextView.this.mContext, null,
10471                    com.android.internal.R.attr.textSelectHandleWindowStyle);
10472            mContainer.setSplitTouchEnabled(true);
10473            mContainer.setClippingEnabled(false);
10474            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
10475            mContainer.setContentView(this);
10476
10477            mDrawableLtr = drawableLtr;
10478            mDrawableRtl = drawableRtl;
10479
10480            updateDrawable();
10481
10482            final int handleHeight = mDrawable.getIntrinsicHeight();
10483            mTouchOffsetY = -0.3f * handleHeight;
10484            mIdealVerticalOffset = 0.7f * handleHeight;
10485        }
10486
10487        protected void updateDrawable() {
10488            final int offset = getCurrentCursorOffset();
10489            final boolean isRtlCharAtOffset = mLayout.isRtlCharAt(offset);
10490            mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr;
10491            mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset);
10492        }
10493
10494        protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun);
10495
10496        // Touch-up filter: number of previous positions remembered
10497        private static final int HISTORY_SIZE = 5;
10498        private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150;
10499        private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350;
10500        private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE];
10501        private final int[] mPreviousOffsets = new int[HISTORY_SIZE];
10502        private int mPreviousOffsetIndex = 0;
10503        private int mNumberPreviousOffsets = 0;
10504
10505        private void startTouchUpFilter(int offset) {
10506            mNumberPreviousOffsets = 0;
10507            addPositionToTouchUpFilter(offset);
10508        }
10509
10510        private void addPositionToTouchUpFilter(int offset) {
10511            mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE;
10512            mPreviousOffsets[mPreviousOffsetIndex] = offset;
10513            mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis();
10514            mNumberPreviousOffsets++;
10515        }
10516
10517        private void filterOnTouchUp() {
10518            final long now = SystemClock.uptimeMillis();
10519            int i = 0;
10520            int index = mPreviousOffsetIndex;
10521            final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE);
10522            while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) {
10523                i++;
10524                index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE;
10525            }
10526
10527            if (i > 0 && i < iMax &&
10528                    (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) {
10529                positionAtCursorOffset(mPreviousOffsets[index], false);
10530            }
10531        }
10532
10533        public boolean offsetHasBeenChanged() {
10534            return mNumberPreviousOffsets > 1;
10535        }
10536
10537        @Override
10538        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
10539            setMeasuredDimension(mDrawable.getIntrinsicWidth(), mDrawable.getIntrinsicHeight());
10540        }
10541
10542        public void show() {
10543            if (isShowing()) return;
10544
10545            getPositionListener().addSubscriber(this, true /* local position may change */);
10546
10547            // Make sure the offset is always considered new, even when focusing at same position
10548            mPreviousOffset = -1;
10549            positionAtCursorOffset(getCurrentCursorOffset(), false);
10550
10551            hideActionPopupWindow();
10552        }
10553
10554        protected void dismiss() {
10555            mIsDragging = false;
10556            mContainer.dismiss();
10557            onDetached();
10558        }
10559
10560        public void hide() {
10561            dismiss();
10562
10563            TextView.this.getPositionListener().removeSubscriber(this);
10564        }
10565
10566        void showActionPopupWindow(int delay) {
10567            if (mActionPopupWindow == null) {
10568                mActionPopupWindow = new ActionPopupWindow();
10569            }
10570            if (mActionPopupShower == null) {
10571                mActionPopupShower = new Runnable() {
10572                    public void run() {
10573                        mActionPopupWindow.show();
10574                    }
10575                };
10576            } else {
10577                TextView.this.removeCallbacks(mActionPopupShower);
10578            }
10579            TextView.this.postDelayed(mActionPopupShower, delay);
10580        }
10581
10582        protected void hideActionPopupWindow() {
10583            if (mActionPopupShower != null) {
10584                TextView.this.removeCallbacks(mActionPopupShower);
10585            }
10586            if (mActionPopupWindow != null) {
10587                mActionPopupWindow.hide();
10588            }
10589        }
10590
10591        public boolean isShowing() {
10592            return mContainer.isShowing();
10593        }
10594
10595        private boolean isVisible() {
10596            // Always show a dragging handle.
10597            if (mIsDragging) {
10598                return true;
10599            }
10600
10601            if (isInBatchEditMode()) {
10602                return false;
10603            }
10604
10605            return getPositionListener().isVisible(mPositionX + mHotspotX, mPositionY);
10606        }
10607
10608        public abstract int getCurrentCursorOffset();
10609
10610        protected abstract void updateSelection(int offset);
10611
10612        public abstract void updatePosition(float x, float y);
10613
10614        protected void positionAtCursorOffset(int offset, boolean parentScrolled) {
10615            // A HandleView relies on the layout, which may be nulled by external methods
10616            if (mLayout == null) {
10617                // Will update controllers' state, hiding them and stopping selection mode if needed
10618                prepareCursorControllers();
10619                return;
10620            }
10621
10622            if (offset != mPreviousOffset || parentScrolled) {
10623                updateSelection(offset);
10624                addPositionToTouchUpFilter(offset);
10625                final int line = mLayout.getLineForOffset(offset);
10626
10627                mPositionX = (int) (mLayout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX);
10628                mPositionY = mLayout.getLineBottom(line);
10629
10630                // Take TextView's padding into account.
10631                mPositionX += viewportToContentHorizontalOffset();
10632                mPositionY += viewportToContentVerticalOffset();
10633
10634                mPreviousOffset = offset;
10635                mPositionHasChanged = true;
10636            }
10637        }
10638
10639        public void updatePosition(int parentPositionX, int parentPositionY,
10640                boolean parentPositionChanged, boolean parentScrolled) {
10641            positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled);
10642            if (parentPositionChanged || mPositionHasChanged) {
10643                if (mIsDragging) {
10644                    // Update touchToWindow offset in case of parent scrolling while dragging
10645                    if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) {
10646                        mTouchToWindowOffsetX += parentPositionX - mLastParentX;
10647                        mTouchToWindowOffsetY += parentPositionY - mLastParentY;
10648                        mLastParentX = parentPositionX;
10649                        mLastParentY = parentPositionY;
10650                    }
10651
10652                    onHandleMoved();
10653                }
10654
10655                if (isVisible()) {
10656                    final int positionX = parentPositionX + mPositionX;
10657                    final int positionY = parentPositionY + mPositionY;
10658                    if (isShowing()) {
10659                        mContainer.update(positionX, positionY, -1, -1);
10660                    } else {
10661                        mContainer.showAtLocation(TextView.this, Gravity.NO_GRAVITY,
10662                                positionX, positionY);
10663                    }
10664                } else {
10665                    if (isShowing()) {
10666                        dismiss();
10667                    }
10668                }
10669
10670                mPositionHasChanged = false;
10671            }
10672        }
10673
10674        @Override
10675        protected void onDraw(Canvas c) {
10676            mDrawable.setBounds(0, 0, mRight - mLeft, mBottom - mTop);
10677            mDrawable.draw(c);
10678        }
10679
10680        @Override
10681        public boolean onTouchEvent(MotionEvent ev) {
10682            switch (ev.getActionMasked()) {
10683                case MotionEvent.ACTION_DOWN: {
10684                    startTouchUpFilter(getCurrentCursorOffset());
10685                    mTouchToWindowOffsetX = ev.getRawX() - mPositionX;
10686                    mTouchToWindowOffsetY = ev.getRawY() - mPositionY;
10687
10688                    final PositionListener positionListener = getPositionListener();
10689                    mLastParentX = positionListener.getPositionX();
10690                    mLastParentY = positionListener.getPositionY();
10691                    mIsDragging = true;
10692                    break;
10693                }
10694
10695                case MotionEvent.ACTION_MOVE: {
10696                    final float rawX = ev.getRawX();
10697                    final float rawY = ev.getRawY();
10698
10699                    // Vertical hysteresis: vertical down movement tends to snap to ideal offset
10700                    final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY;
10701                    final float currentVerticalOffset = rawY - mPositionY - mLastParentY;
10702                    float newVerticalOffset;
10703                    if (previousVerticalOffset < mIdealVerticalOffset) {
10704                        newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset);
10705                        newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset);
10706                    } else {
10707                        newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset);
10708                        newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset);
10709                    }
10710                    mTouchToWindowOffsetY = newVerticalOffset + mLastParentY;
10711
10712                    final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX;
10713                    final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY;
10714
10715                    updatePosition(newPosX, newPosY);
10716                    break;
10717                }
10718
10719                case MotionEvent.ACTION_UP:
10720                    filterOnTouchUp();
10721                    mIsDragging = false;
10722                    break;
10723
10724                case MotionEvent.ACTION_CANCEL:
10725                    mIsDragging = false;
10726                    break;
10727            }
10728            return true;
10729        }
10730
10731        public boolean isDragging() {
10732            return mIsDragging;
10733        }
10734
10735        void onHandleMoved() {
10736            hideActionPopupWindow();
10737        }
10738
10739        public void onDetached() {
10740            hideActionPopupWindow();
10741        }
10742    }
10743
10744    private class InsertionHandleView extends HandleView {
10745        private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000;
10746        private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds
10747
10748        // Used to detect taps on the insertion handle, which will affect the ActionPopupWindow
10749        private float mDownPositionX, mDownPositionY;
10750        private Runnable mHider;
10751
10752        public InsertionHandleView(Drawable drawable) {
10753            super(drawable, drawable);
10754        }
10755
10756        @Override
10757        public void show() {
10758            super.show();
10759
10760            final long durationSinceCutOrCopy = SystemClock.uptimeMillis() - sLastCutOrCopyTime;
10761            if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) {
10762                showActionPopupWindow(0);
10763            }
10764
10765            hideAfterDelay();
10766        }
10767
10768        public void showWithActionPopup() {
10769            show();
10770            showActionPopupWindow(0);
10771        }
10772
10773        private void hideAfterDelay() {
10774            removeHiderCallback();
10775            if (mHider == null) {
10776                mHider = new Runnable() {
10777                    public void run() {
10778                        hide();
10779                    }
10780                };
10781            }
10782            TextView.this.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT);
10783        }
10784
10785        private void removeHiderCallback() {
10786            if (mHider != null) {
10787                TextView.this.removeCallbacks(mHider);
10788            }
10789        }
10790
10791        @Override
10792        protected int getHotspotX(Drawable drawable, boolean isRtlRun) {
10793            return drawable.getIntrinsicWidth() / 2;
10794        }
10795
10796        @Override
10797        public boolean onTouchEvent(MotionEvent ev) {
10798            final boolean result = super.onTouchEvent(ev);
10799
10800            switch (ev.getActionMasked()) {
10801                case MotionEvent.ACTION_DOWN:
10802                    mDownPositionX = ev.getRawX();
10803                    mDownPositionY = ev.getRawY();
10804                    break;
10805
10806                case MotionEvent.ACTION_UP:
10807                    if (!offsetHasBeenChanged()) {
10808                        final float deltaX = mDownPositionX - ev.getRawX();
10809                        final float deltaY = mDownPositionY - ev.getRawY();
10810                        final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
10811                        if (distanceSquared < mSquaredTouchSlopDistance) {
10812                            if (mActionPopupWindow != null && mActionPopupWindow.isShowing()) {
10813                                // Tapping on the handle dismisses the displayed action popup
10814                                mActionPopupWindow.hide();
10815                            } else {
10816                                showWithActionPopup();
10817                            }
10818                        }
10819                    }
10820                    hideAfterDelay();
10821                    break;
10822
10823                case MotionEvent.ACTION_CANCEL:
10824                    hideAfterDelay();
10825                    break;
10826
10827                default:
10828                    break;
10829            }
10830
10831            return result;
10832        }
10833
10834        @Override
10835        public int getCurrentCursorOffset() {
10836            return TextView.this.getSelectionStart();
10837        }
10838
10839        @Override
10840        public void updateSelection(int offset) {
10841            Selection.setSelection((Spannable) mText, offset);
10842        }
10843
10844        @Override
10845        public void updatePosition(float x, float y) {
10846            positionAtCursorOffset(getOffsetForPosition(x, y), false);
10847        }
10848
10849        @Override
10850        void onHandleMoved() {
10851            super.onHandleMoved();
10852            removeHiderCallback();
10853        }
10854
10855        @Override
10856        public void onDetached() {
10857            super.onDetached();
10858            removeHiderCallback();
10859        }
10860    }
10861
10862    private class SelectionStartHandleView extends HandleView {
10863
10864        public SelectionStartHandleView(Drawable drawableLtr, Drawable drawableRtl) {
10865            super(drawableLtr, drawableRtl);
10866        }
10867
10868        @Override
10869        protected int getHotspotX(Drawable drawable, boolean isRtlRun) {
10870            if (isRtlRun) {
10871                return drawable.getIntrinsicWidth() / 4;
10872            } else {
10873                return (drawable.getIntrinsicWidth() * 3) / 4;
10874            }
10875        }
10876
10877        @Override
10878        public int getCurrentCursorOffset() {
10879            return TextView.this.getSelectionStart();
10880        }
10881
10882        @Override
10883        public void updateSelection(int offset) {
10884            Selection.setSelection((Spannable) mText, offset, getSelectionEnd());
10885            updateDrawable();
10886        }
10887
10888        @Override
10889        public void updatePosition(float x, float y) {
10890            int offset = getOffsetForPosition(x, y);
10891
10892            // Handles can not cross and selection is at least one character
10893            final int selectionEnd = getSelectionEnd();
10894            if (offset >= selectionEnd) offset = selectionEnd - 1;
10895
10896            positionAtCursorOffset(offset, false);
10897        }
10898
10899        public ActionPopupWindow getActionPopupWindow() {
10900            return mActionPopupWindow;
10901        }
10902    }
10903
10904    private class SelectionEndHandleView extends HandleView {
10905
10906        public SelectionEndHandleView(Drawable drawableLtr, Drawable drawableRtl) {
10907            super(drawableLtr, drawableRtl);
10908        }
10909
10910        @Override
10911        protected int getHotspotX(Drawable drawable, boolean isRtlRun) {
10912            if (isRtlRun) {
10913                return (drawable.getIntrinsicWidth() * 3) / 4;
10914            } else {
10915                return drawable.getIntrinsicWidth() / 4;
10916            }
10917        }
10918
10919        @Override
10920        public int getCurrentCursorOffset() {
10921            return TextView.this.getSelectionEnd();
10922        }
10923
10924        @Override
10925        public void updateSelection(int offset) {
10926            Selection.setSelection((Spannable) mText, getSelectionStart(), offset);
10927            updateDrawable();
10928        }
10929
10930        @Override
10931        public void updatePosition(float x, float y) {
10932            int offset = getOffsetForPosition(x, y);
10933
10934            // Handles can not cross and selection is at least one character
10935            final int selectionStart = getSelectionStart();
10936            if (offset <= selectionStart) offset = selectionStart + 1;
10937
10938            positionAtCursorOffset(offset, false);
10939        }
10940
10941        public void setActionPopupWindow(ActionPopupWindow actionPopupWindow) {
10942            mActionPopupWindow = actionPopupWindow;
10943        }
10944    }
10945
10946    /**
10947     * A CursorController instance can be used to control a cursor in the text.
10948     * It is not used outside of {@link TextView}.
10949     * @hide
10950     */
10951    private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener {
10952        /**
10953         * Makes the cursor controller visible on screen. Will be drawn by {@link #draw(Canvas)}.
10954         * See also {@link #hide()}.
10955         */
10956        public void show();
10957
10958        /**
10959         * Hide the cursor controller from screen.
10960         * See also {@link #show()}.
10961         */
10962        public void hide();
10963
10964        /**
10965         * Called when the view is detached from window. Perform house keeping task, such as
10966         * stopping Runnable thread that would otherwise keep a reference on the context, thus
10967         * preventing the activity from being recycled.
10968         */
10969        public void onDetached();
10970    }
10971
10972    private class InsertionPointCursorController implements CursorController {
10973        private InsertionHandleView mHandle;
10974
10975        public void show() {
10976            getHandle().show();
10977        }
10978
10979        public void showWithActionPopup() {
10980            getHandle().showWithActionPopup();
10981        }
10982
10983        public void hide() {
10984            if (mHandle != null) {
10985                mHandle.hide();
10986            }
10987        }
10988
10989        public void onTouchModeChanged(boolean isInTouchMode) {
10990            if (!isInTouchMode) {
10991                hide();
10992            }
10993        }
10994
10995        private InsertionHandleView getHandle() {
10996            if (mSelectHandleCenter == null) {
10997                mSelectHandleCenter = mContext.getResources().getDrawable(
10998                        mTextSelectHandleRes);
10999            }
11000            if (mHandle == null) {
11001                mHandle = new InsertionHandleView(mSelectHandleCenter);
11002            }
11003            return mHandle;
11004        }
11005
11006        @Override
11007        public void onDetached() {
11008            final ViewTreeObserver observer = getViewTreeObserver();
11009            observer.removeOnTouchModeChangeListener(this);
11010
11011            if (mHandle != null) mHandle.onDetached();
11012        }
11013    }
11014
11015    private class SelectionModifierCursorController implements CursorController {
11016        private static final int DELAY_BEFORE_REPLACE_ACTION = 200; // milliseconds
11017        // The cursor controller handles, lazily created when shown.
11018        private SelectionStartHandleView mStartHandle;
11019        private SelectionEndHandleView mEndHandle;
11020        // The offsets of that last touch down event. Remembered to start selection there.
11021        private int mMinTouchOffset, mMaxTouchOffset;
11022
11023        // Double tap detection
11024        private long mPreviousTapUpTime = 0;
11025        private float mPreviousTapPositionX, mPreviousTapPositionY;
11026
11027        SelectionModifierCursorController() {
11028            resetTouchOffsets();
11029        }
11030
11031        public void show() {
11032            if (isInBatchEditMode()) {
11033                return;
11034            }
11035            initDrawables();
11036            initHandles();
11037            hideInsertionPointCursorController();
11038        }
11039
11040        private void initDrawables() {
11041            if (mSelectHandleLeft == null) {
11042                mSelectHandleLeft = mContext.getResources().getDrawable(
11043                        mTextSelectHandleLeftRes);
11044            }
11045            if (mSelectHandleRight == null) {
11046                mSelectHandleRight = mContext.getResources().getDrawable(
11047                        mTextSelectHandleRightRes);
11048            }
11049        }
11050
11051        private void initHandles() {
11052            // Lazy object creation has to be done before updatePosition() is called.
11053            if (mStartHandle == null) {
11054                mStartHandle = new SelectionStartHandleView(mSelectHandleLeft, mSelectHandleRight);
11055            }
11056            if (mEndHandle == null) {
11057                mEndHandle = new SelectionEndHandleView(mSelectHandleRight, mSelectHandleLeft);
11058            }
11059
11060            mStartHandle.show();
11061            mEndHandle.show();
11062
11063            // Make sure both left and right handles share the same ActionPopupWindow (so that
11064            // moving any of the handles hides the action popup).
11065            mStartHandle.showActionPopupWindow(DELAY_BEFORE_REPLACE_ACTION);
11066            mEndHandle.setActionPopupWindow(mStartHandle.getActionPopupWindow());
11067
11068            hideInsertionPointCursorController();
11069        }
11070
11071        public void hide() {
11072            if (mStartHandle != null) mStartHandle.hide();
11073            if (mEndHandle != null) mEndHandle.hide();
11074        }
11075
11076        public void onTouchEvent(MotionEvent event) {
11077            // This is done even when the View does not have focus, so that long presses can start
11078            // selection and tap can move cursor from this tap position.
11079            switch (event.getActionMasked()) {
11080                case MotionEvent.ACTION_DOWN:
11081                    final float x = event.getX();
11082                    final float y = event.getY();
11083
11084                    // Remember finger down position, to be able to start selection from there
11085                    mMinTouchOffset = mMaxTouchOffset = getOffsetForPosition(x, y);
11086
11087                    // Double tap detection
11088                    long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime;
11089                    if (duration <= ViewConfiguration.getDoubleTapTimeout() &&
11090                            isPositionOnText(x, y)) {
11091                        final float deltaX = x - mPreviousTapPositionX;
11092                        final float deltaY = y - mPreviousTapPositionY;
11093                        final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
11094                        if (distanceSquared < mSquaredTouchSlopDistance) {
11095                            startSelectionActionMode();
11096                            mDiscardNextActionUp = true;
11097                        }
11098                    }
11099
11100                    mPreviousTapPositionX = x;
11101                    mPreviousTapPositionY = y;
11102                    break;
11103
11104                case MotionEvent.ACTION_POINTER_DOWN:
11105                case MotionEvent.ACTION_POINTER_UP:
11106                    // Handle multi-point gestures. Keep min and max offset positions.
11107                    // Only activated for devices that correctly handle multi-touch.
11108                    if (mContext.getPackageManager().hasSystemFeature(
11109                            PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) {
11110                        updateMinAndMaxOffsets(event);
11111                    }
11112                    break;
11113
11114                case MotionEvent.ACTION_UP:
11115                    mPreviousTapUpTime = SystemClock.uptimeMillis();
11116                    break;
11117            }
11118        }
11119
11120        /**
11121         * @param event
11122         */
11123        private void updateMinAndMaxOffsets(MotionEvent event) {
11124            int pointerCount = event.getPointerCount();
11125            for (int index = 0; index < pointerCount; index++) {
11126                int offset = getOffsetForPosition(event.getX(index), event.getY(index));
11127                if (offset < mMinTouchOffset) mMinTouchOffset = offset;
11128                if (offset > mMaxTouchOffset) mMaxTouchOffset = offset;
11129            }
11130        }
11131
11132        public int getMinTouchOffset() {
11133            return mMinTouchOffset;
11134        }
11135
11136        public int getMaxTouchOffset() {
11137            return mMaxTouchOffset;
11138        }
11139
11140        public void resetTouchOffsets() {
11141            mMinTouchOffset = mMaxTouchOffset = -1;
11142        }
11143
11144        /**
11145         * @return true iff this controller is currently used to move the selection start.
11146         */
11147        public boolean isSelectionStartDragged() {
11148            return mStartHandle != null && mStartHandle.isDragging();
11149        }
11150
11151        public void onTouchModeChanged(boolean isInTouchMode) {
11152            if (!isInTouchMode) {
11153                hide();
11154            }
11155        }
11156
11157        @Override
11158        public void onDetached() {
11159            final ViewTreeObserver observer = getViewTreeObserver();
11160            observer.removeOnTouchModeChangeListener(this);
11161
11162            if (mStartHandle != null) mStartHandle.onDetached();
11163            if (mEndHandle != null) mEndHandle.onDetached();
11164        }
11165    }
11166
11167    private void hideInsertionPointCursorController() {
11168        // No need to create the controller to hide it.
11169        if (mInsertionPointCursorController != null) {
11170            mInsertionPointCursorController.hide();
11171        }
11172    }
11173
11174    /**
11175     * Hides the insertion controller and stops text selection mode, hiding the selection controller
11176     */
11177    private void hideControllers() {
11178        hideCursorControllers();
11179        hideSpanControllers();
11180    }
11181
11182    private void hideSpanControllers() {
11183        if (mChangeWatcher != null) {
11184            mChangeWatcher.hideControllers();
11185        }
11186    }
11187
11188    private void hideCursorControllers() {
11189        hideInsertionPointCursorController();
11190        stopSelectionActionMode();
11191    }
11192
11193    /**
11194     * Get the character offset closest to the specified absolute position. A typical use case is to
11195     * pass the result of {@link MotionEvent#getX()} and {@link MotionEvent#getY()} to this method.
11196     *
11197     * @param x The horizontal absolute position of a point on screen
11198     * @param y The vertical absolute position of a point on screen
11199     * @return the character offset for the character whose position is closest to the specified
11200     *  position. Returns -1 if there is no layout.
11201     */
11202    public int getOffsetForPosition(float x, float y) {
11203        if (getLayout() == null) return -1;
11204        final int line = getLineAtCoordinate(y);
11205        final int offset = getOffsetAtCoordinate(line, x);
11206        return offset;
11207    }
11208
11209    private float convertToLocalHorizontalCoordinate(float x) {
11210        x -= getTotalPaddingLeft();
11211        // Clamp the position to inside of the view.
11212        x = Math.max(0.0f, x);
11213        x = Math.min(getWidth() - getTotalPaddingRight() - 1, x);
11214        x += getScrollX();
11215        return x;
11216    }
11217
11218    private int getLineAtCoordinate(float y) {
11219        y -= getTotalPaddingTop();
11220        // Clamp the position to inside of the view.
11221        y = Math.max(0.0f, y);
11222        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
11223        y += getScrollY();
11224        return getLayout().getLineForVertical((int) y);
11225    }
11226
11227    private int getOffsetAtCoordinate(int line, float x) {
11228        x = convertToLocalHorizontalCoordinate(x);
11229        return getLayout().getOffsetForHorizontal(line, x);
11230    }
11231
11232    /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed
11233     * in the view. Returns false when the position is in the empty space of left/right of text.
11234     */
11235    private boolean isPositionOnText(float x, float y) {
11236        if (getLayout() == null) return false;
11237
11238        final int line = getLineAtCoordinate(y);
11239        x = convertToLocalHorizontalCoordinate(x);
11240
11241        if (x < getLayout().getLineLeft(line)) return false;
11242        if (x > getLayout().getLineRight(line)) return false;
11243        return true;
11244    }
11245
11246    @Override
11247    public boolean onDragEvent(DragEvent event) {
11248        switch (event.getAction()) {
11249            case DragEvent.ACTION_DRAG_STARTED:
11250                return hasInsertionController();
11251
11252            case DragEvent.ACTION_DRAG_ENTERED:
11253                TextView.this.requestFocus();
11254                return true;
11255
11256            case DragEvent.ACTION_DRAG_LOCATION:
11257                final int offset = getOffsetForPosition(event.getX(), event.getY());
11258                Selection.setSelection((Spannable)mText, offset);
11259                return true;
11260
11261            case DragEvent.ACTION_DROP:
11262                onDrop(event);
11263                return true;
11264
11265            case DragEvent.ACTION_DRAG_ENDED:
11266            case DragEvent.ACTION_DRAG_EXITED:
11267            default:
11268                return true;
11269        }
11270    }
11271
11272    private void onDrop(DragEvent event) {
11273        StringBuilder content = new StringBuilder("");
11274        ClipData clipData = event.getClipData();
11275        final int itemCount = clipData.getItemCount();
11276        for (int i=0; i < itemCount; i++) {
11277            Item item = clipData.getItemAt(i);
11278            content.append(item.coerceToText(TextView.this.mContext));
11279        }
11280
11281        final int offset = getOffsetForPosition(event.getX(), event.getY());
11282
11283        Object localState = event.getLocalState();
11284        DragLocalState dragLocalState = null;
11285        if (localState instanceof DragLocalState) {
11286            dragLocalState = (DragLocalState) localState;
11287        }
11288        boolean dragDropIntoItself = dragLocalState != null &&
11289                dragLocalState.sourceTextView == this;
11290
11291        if (dragDropIntoItself) {
11292            if (offset >= dragLocalState.start && offset < dragLocalState.end) {
11293                // A drop inside the original selection discards the drop.
11294                return;
11295            }
11296        }
11297
11298        final int originalLength = mText.length();
11299        long minMax = prepareSpacesAroundPaste(offset, offset, content);
11300        int min = extractRangeStartFromLong(minMax);
11301        int max = extractRangeEndFromLong(minMax);
11302
11303        Selection.setSelection((Spannable) mText, max);
11304        ((Editable) mText).replace(min, max, content);
11305
11306        if (dragDropIntoItself) {
11307            int dragSourceStart = dragLocalState.start;
11308            int dragSourceEnd = dragLocalState.end;
11309            if (max <= dragSourceStart) {
11310                // Inserting text before selection has shifted positions
11311                final int shift = mText.length() - originalLength;
11312                dragSourceStart += shift;
11313                dragSourceEnd += shift;
11314            }
11315
11316            // Delete original selection
11317            ((Editable) mText).delete(dragSourceStart, dragSourceEnd);
11318
11319            // Make sure we do not leave two adjacent spaces.
11320            if ((dragSourceStart == 0 ||
11321                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart - 1))) &&
11322                    (dragSourceStart == mText.length() ||
11323                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart)))) {
11324                final int pos = dragSourceStart == mText.length() ?
11325                        dragSourceStart - 1 : dragSourceStart;
11326                ((Editable) mText).delete(pos, pos + 1);
11327            }
11328        }
11329    }
11330
11331    /**
11332     * @return True if this view supports insertion handles.
11333     */
11334    boolean hasInsertionController() {
11335        return mInsertionControllerEnabled;
11336    }
11337
11338    /**
11339     * @return True if this view supports selection handles.
11340     */
11341    boolean hasSelectionController() {
11342        return mSelectionControllerEnabled;
11343    }
11344
11345    InsertionPointCursorController getInsertionController() {
11346        if (!mInsertionControllerEnabled) {
11347            return null;
11348        }
11349
11350        if (mInsertionPointCursorController == null) {
11351            mInsertionPointCursorController = new InsertionPointCursorController();
11352
11353            final ViewTreeObserver observer = getViewTreeObserver();
11354            observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
11355        }
11356
11357        return mInsertionPointCursorController;
11358    }
11359
11360    SelectionModifierCursorController getSelectionController() {
11361        if (!mSelectionControllerEnabled) {
11362            return null;
11363        }
11364
11365        if (mSelectionModifierCursorController == null) {
11366            mSelectionModifierCursorController = new SelectionModifierCursorController();
11367
11368            final ViewTreeObserver observer = getViewTreeObserver();
11369            observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
11370        }
11371
11372        return mSelectionModifierCursorController;
11373    }
11374
11375    boolean isInBatchEditMode() {
11376        final InputMethodState ims = mInputMethodState;
11377        if (ims != null) {
11378            return ims.mBatchEditNesting > 0;
11379        }
11380        return mInBatchEditControllers;
11381    }
11382
11383    @Override
11384    protected void resolveTextDirection() {
11385        if (hasPasswordTransformationMethod()) {
11386            mTextDir = TextDirectionHeuristics.LOCALE;
11387            return;
11388        }
11389
11390        // Always need to resolve layout direction first
11391        final boolean defaultIsRtl = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL);
11392
11393        // Then resolve text direction on the parent
11394        super.resolveTextDirection();
11395
11396        // Now, we can select the heuristic
11397        int textDir = getResolvedTextDirection();
11398        switch (textDir) {
11399            default:
11400            case TEXT_DIRECTION_FIRST_STRONG:
11401                mTextDir = (defaultIsRtl ? TextDirectionHeuristics.FIRSTSTRONG_RTL :
11402                        TextDirectionHeuristics.FIRSTSTRONG_LTR);
11403                break;
11404            case TEXT_DIRECTION_ANY_RTL:
11405                mTextDir = TextDirectionHeuristics.ANYRTL_LTR;
11406                break;
11407            case TEXT_DIRECTION_LTR:
11408                mTextDir = TextDirectionHeuristics.LTR;
11409                break;
11410            case TEXT_DIRECTION_RTL:
11411                mTextDir = TextDirectionHeuristics.RTL;
11412                break;
11413        }
11414    }
11415
11416    /**
11417     * Subclasses will need to override this method to implement their own way of resolving
11418     * drawables depending on the layout direction.
11419     *
11420     * A call to the super method will be required from the subclasses implementation.
11421     *
11422     */
11423    protected void resolveDrawables() {
11424        // No need to resolve twice
11425        if (mResolvedDrawables) {
11426            return;
11427        }
11428        // No drawable to resolve
11429        if (mDrawables == null) {
11430            return;
11431        }
11432        // No relative drawable to resolve
11433        if (mDrawables.mDrawableStart == null && mDrawables.mDrawableEnd == null) {
11434            mResolvedDrawables = true;
11435            return;
11436        }
11437
11438        Drawables dr = mDrawables;
11439        switch(getResolvedLayoutDirection()) {
11440            case LAYOUT_DIRECTION_RTL:
11441                if (dr.mDrawableStart != null) {
11442                    dr.mDrawableRight = dr.mDrawableStart;
11443
11444                    dr.mDrawableSizeRight = dr.mDrawableSizeStart;
11445                    dr.mDrawableHeightRight = dr.mDrawableHeightStart;
11446                }
11447                if (dr.mDrawableEnd != null) {
11448                    dr.mDrawableLeft = dr.mDrawableEnd;
11449
11450                    dr.mDrawableSizeLeft = dr.mDrawableSizeEnd;
11451                    dr.mDrawableHeightLeft = dr.mDrawableHeightEnd;
11452                }
11453                break;
11454
11455            case LAYOUT_DIRECTION_LTR:
11456            default:
11457                if (dr.mDrawableStart != null) {
11458                    dr.mDrawableLeft = dr.mDrawableStart;
11459
11460                    dr.mDrawableSizeLeft = dr.mDrawableSizeStart;
11461                    dr.mDrawableHeightLeft = dr.mDrawableHeightStart;
11462                }
11463                if (dr.mDrawableEnd != null) {
11464                    dr.mDrawableRight = dr.mDrawableEnd;
11465
11466                    dr.mDrawableSizeRight = dr.mDrawableSizeEnd;
11467                    dr.mDrawableHeightRight = dr.mDrawableHeightEnd;
11468                }
11469                break;
11470        }
11471        mResolvedDrawables = true;
11472    }
11473
11474    protected void resetResolvedDrawables() {
11475        mResolvedDrawables = false;
11476    }
11477
11478    /**
11479     * @hide
11480     */
11481    protected void viewClicked(InputMethodManager imm) {
11482        if (imm != null) {
11483            imm.viewClicked(this);
11484        }
11485    }
11486
11487    @ViewDebug.ExportedProperty(category = "text")
11488    private CharSequence            mText;
11489    private CharSequence            mTransformed;
11490    private BufferType              mBufferType = BufferType.NORMAL;
11491
11492    private int                     mInputType = EditorInfo.TYPE_NULL;
11493    private CharSequence            mHint;
11494    private Layout                  mHintLayout;
11495
11496    private KeyListener             mInput;
11497
11498    private MovementMethod          mMovement;
11499    private TransformationMethod    mTransformation;
11500    private boolean                 mAllowTransformationLengthChange;
11501    private ChangeWatcher           mChangeWatcher;
11502
11503    private ArrayList<TextWatcher>  mListeners = null;
11504
11505    // display attributes
11506    private final TextPaint         mTextPaint;
11507    private boolean                 mUserSetTextScaleX;
11508    private final Paint             mHighlightPaint;
11509    private int                     mHighlightColor = 0x6633B5E5;
11510    /**
11511     * This is temporarily visible to fix bug 3085564 in webView. Do not rely on
11512     * this field being protected. Will be restored as private when lineHeight
11513     * feature request 3215097 is implemented
11514     * @hide
11515     */
11516    protected Layout                mLayout;
11517
11518    private long                    mShowCursor;
11519    private Blink                   mBlink;
11520    private boolean                 mCursorVisible = true;
11521
11522    // Cursor Controllers.
11523    private InsertionPointCursorController mInsertionPointCursorController;
11524    private SelectionModifierCursorController mSelectionModifierCursorController;
11525    private ActionMode              mSelectionActionMode;
11526    private boolean                 mInsertionControllerEnabled;
11527    private boolean                 mSelectionControllerEnabled;
11528    private boolean                 mInBatchEditControllers;
11529
11530    // These are needed to desambiguate a long click. If the long click comes from ones of these, we
11531    // select from the current cursor position. Otherwise, select from long pressed position.
11532    private boolean                 mDPadCenterIsDown = false;
11533    private boolean                 mEnterKeyIsDown = false;
11534    private boolean                 mContextMenuTriggeredByKey = false;
11535
11536    private boolean                 mSelectAllOnFocus = false;
11537
11538    private int                     mGravity = Gravity.TOP | Gravity.START;
11539    private boolean                 mHorizontallyScrolling;
11540
11541    private int                     mAutoLinkMask;
11542    private boolean                 mLinksClickable = true;
11543
11544    private float                   mSpacingMult = 1.0f;
11545    private float                   mSpacingAdd = 0.0f;
11546    private boolean                 mTextIsSelectable = false;
11547
11548    private static final int        LINES = 1;
11549    private static final int        EMS = LINES;
11550    private static final int        PIXELS = 2;
11551
11552    private int                     mMaximum = Integer.MAX_VALUE;
11553    private int                     mMaxMode = LINES;
11554    private int                     mMinimum = 0;
11555    private int                     mMinMode = LINES;
11556
11557    private int                     mOldMaximum = mMaximum;
11558    private int                     mOldMaxMode = mMaxMode;
11559
11560    private int                     mMaxWidth = Integer.MAX_VALUE;
11561    private int                     mMaxWidthMode = PIXELS;
11562    private int                     mMinWidth = 0;
11563    private int                     mMinWidthMode = PIXELS;
11564
11565    private boolean                 mSingleLine;
11566    private int                     mDesiredHeightAtMeasure = -1;
11567    private boolean                 mIncludePad = true;
11568
11569    // tmp primitives, so we don't alloc them on each draw
11570    private Path                    mHighlightPath;
11571    private boolean                 mHighlightPathBogus = true;
11572    private static final RectF      sTempRect = new RectF();
11573
11574    // XXX should be much larger
11575    private static final int        VERY_WIDE = 16384;
11576
11577    private static final int        BLINK = 500;
11578
11579    private static final int ANIMATED_SCROLL_GAP = 250;
11580    private long mLastScroll;
11581    private Scroller mScroller = null;
11582
11583    private BoringLayout.Metrics mBoring;
11584    private BoringLayout.Metrics mHintBoring;
11585
11586    private BoringLayout mSavedLayout, mSavedHintLayout;
11587
11588    private TextDirectionHeuristic mTextDir = null;
11589
11590    private static final InputFilter[] NO_FILTERS = new InputFilter[0];
11591    private InputFilter[] mFilters = NO_FILTERS;
11592    private static final Spanned EMPTY_SPANNED = new SpannedString("");
11593    private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20;
11594    // System wide time for last cut or copy action.
11595    private static long sLastCutOrCopyTime;
11596    // Used to highlight a word when it is corrected by the IME
11597    private CorrectionHighlighter mCorrectionHighlighter;
11598    // New state used to change background based on whether this TextView is multiline.
11599    private static final int[] MULTILINE_STATE_SET = { R.attr.state_multiline };
11600}
11601