TextView.java revision e9b82808d412fa1b87954dd88579b92d0b4ab0e2 
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.view.inputmethod.InputMethodSubtype;
136import android.widget.AdapterView.OnItemClickListener;
137import android.widget.RemoteViews.RemoteView;
138
139import com.android.internal.util.FastMath;
140import com.android.internal.widget.EditableInputConnection;
141
142import org.xmlpull.v1.XmlPullParserException;
143
144import java.io.IOException;
145import java.lang.ref.WeakReference;
146import java.text.BreakIterator;
147import java.util.ArrayList;
148import java.util.Arrays;
149import java.util.Comparator;
150import java.util.HashMap;
151import java.util.Locale;
152
153/**
154 * Displays text to the user and optionally allows them to edit it.  A TextView
155 * is a complete text editor, however the basic class is configured to not
156 * allow editing; see {@link EditText} for a subclass that configures the text
157 * view for editing.
158 *
159 * <p>
160 * <b>XML attributes</b>
161 * <p>
162 * See {@link android.R.styleable#TextView TextView Attributes},
163 * {@link android.R.styleable#View View Attributes}
164 *
165 * @attr ref android.R.styleable#TextView_text
166 * @attr ref android.R.styleable#TextView_bufferType
167 * @attr ref android.R.styleable#TextView_hint
168 * @attr ref android.R.styleable#TextView_textColor
169 * @attr ref android.R.styleable#TextView_textColorHighlight
170 * @attr ref android.R.styleable#TextView_textColorHint
171 * @attr ref android.R.styleable#TextView_textAppearance
172 * @attr ref android.R.styleable#TextView_textColorLink
173 * @attr ref android.R.styleable#TextView_textSize
174 * @attr ref android.R.styleable#TextView_textScaleX
175 * @attr ref android.R.styleable#TextView_typeface
176 * @attr ref android.R.styleable#TextView_textStyle
177 * @attr ref android.R.styleable#TextView_cursorVisible
178 * @attr ref android.R.styleable#TextView_maxLines
179 * @attr ref android.R.styleable#TextView_maxHeight
180 * @attr ref android.R.styleable#TextView_lines
181 * @attr ref android.R.styleable#TextView_height
182 * @attr ref android.R.styleable#TextView_minLines
183 * @attr ref android.R.styleable#TextView_minHeight
184 * @attr ref android.R.styleable#TextView_maxEms
185 * @attr ref android.R.styleable#TextView_maxWidth
186 * @attr ref android.R.styleable#TextView_ems
187 * @attr ref android.R.styleable#TextView_width
188 * @attr ref android.R.styleable#TextView_minEms
189 * @attr ref android.R.styleable#TextView_minWidth
190 * @attr ref android.R.styleable#TextView_gravity
191 * @attr ref android.R.styleable#TextView_scrollHorizontally
192 * @attr ref android.R.styleable#TextView_password
193 * @attr ref android.R.styleable#TextView_singleLine
194 * @attr ref android.R.styleable#TextView_selectAllOnFocus
195 * @attr ref android.R.styleable#TextView_includeFontPadding
196 * @attr ref android.R.styleable#TextView_maxLength
197 * @attr ref android.R.styleable#TextView_shadowColor
198 * @attr ref android.R.styleable#TextView_shadowDx
199 * @attr ref android.R.styleable#TextView_shadowDy
200 * @attr ref android.R.styleable#TextView_shadowRadius
201 * @attr ref android.R.styleable#TextView_autoLink
202 * @attr ref android.R.styleable#TextView_linksClickable
203 * @attr ref android.R.styleable#TextView_numeric
204 * @attr ref android.R.styleable#TextView_digits
205 * @attr ref android.R.styleable#TextView_phoneNumber
206 * @attr ref android.R.styleable#TextView_inputMethod
207 * @attr ref android.R.styleable#TextView_capitalize
208 * @attr ref android.R.styleable#TextView_autoText
209 * @attr ref android.R.styleable#TextView_editable
210 * @attr ref android.R.styleable#TextView_freezesText
211 * @attr ref android.R.styleable#TextView_ellipsize
212 * @attr ref android.R.styleable#TextView_drawableTop
213 * @attr ref android.R.styleable#TextView_drawableBottom
214 * @attr ref android.R.styleable#TextView_drawableRight
215 * @attr ref android.R.styleable#TextView_drawableLeft
216 * @attr ref android.R.styleable#TextView_drawablePadding
217 * @attr ref android.R.styleable#TextView_lineSpacingExtra
218 * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
219 * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
220 * @attr ref android.R.styleable#TextView_inputType
221 * @attr ref android.R.styleable#TextView_imeOptions
222 * @attr ref android.R.styleable#TextView_privateImeOptions
223 * @attr ref android.R.styleable#TextView_imeActionLabel
224 * @attr ref android.R.styleable#TextView_imeActionId
225 * @attr ref android.R.styleable#TextView_editorExtras
226 */
227@RemoteView
228public class TextView extends View implements ViewTreeObserver.OnPreDrawListener {
229    static final String LOG_TAG = "TextView";
230    static final boolean DEBUG_EXTRACT = false;
231
232    private static final int PRIORITY = 100;
233    private int mCurrentAlpha = 255;
234
235    final int[] mTempCoords = new int[2];
236    Rect mTempRect;
237
238    private ColorStateList mTextColor;
239    private int mCurTextColor;
240    private ColorStateList mHintTextColor;
241    private ColorStateList mLinkTextColor;
242    private int mCurHintTextColor;
243    private boolean mFreezesText;
244    private boolean mFrozenWithFocus;
245    private boolean mTemporaryDetach;
246    private boolean mDispatchTemporaryDetach;
247
248    private boolean mDiscardNextActionUp = false;
249    private boolean mIgnoreActionUpEvent = false;
250
251    private Editable.Factory mEditableFactory = Editable.Factory.getInstance();
252    private Spannable.Factory mSpannableFactory = Spannable.Factory.getInstance();
253
254    private float mShadowRadius, mShadowDx, mShadowDy;
255
256    private static final int PREDRAW_NOT_REGISTERED = 0;
257    private static final int PREDRAW_PENDING = 1;
258    private static final int PREDRAW_DONE = 2;
259    private int mPreDrawState = PREDRAW_NOT_REGISTERED;
260
261    private TextUtils.TruncateAt mEllipsize = null;
262
263    // Enum for the "typeface" XML parameter.
264    // TODO: How can we get this from the XML instead of hardcoding it here?
265    private static final int SANS = 1;
266    private static final int SERIF = 2;
267    private static final int MONOSPACE = 3;
268
269    // Bitfield for the "numeric" XML parameter.
270    // TODO: How can we get this from the XML instead of hardcoding it here?
271    private static final int SIGNED = 2;
272    private static final int DECIMAL = 4;
273
274    class Drawables {
275        final Rect mCompoundRect = new Rect();
276        Drawable mDrawableTop, mDrawableBottom, mDrawableLeft, mDrawableRight,
277                mDrawableStart, mDrawableEnd;
278        int mDrawableSizeTop, mDrawableSizeBottom, mDrawableSizeLeft, mDrawableSizeRight,
279                mDrawableSizeStart, mDrawableSizeEnd;
280        int mDrawableWidthTop, mDrawableWidthBottom, mDrawableHeightLeft, mDrawableHeightRight,
281                mDrawableHeightStart, mDrawableHeightEnd;
282        int mDrawablePadding;
283    }
284    private Drawables mDrawables;
285
286    private CharSequence mError;
287    private boolean mErrorWasChanged;
288    private ErrorPopup mPopup;
289    /**
290     * This flag is set if the TextView tries to display an error before it
291     * is attached to the window (so its position is still unknown).
292     * It causes the error to be shown later, when onAttachedToWindow()
293     * is called.
294     */
295    private boolean mShowErrorAfterAttach;
296
297    private CharWrapper mCharWrapper = null;
298
299    private boolean mSelectionMoved = false;
300    private boolean mTouchFocusSelected = false;
301
302    private Marquee mMarquee;
303    private boolean mRestartMarquee;
304
305    private int mMarqueeRepeatLimit = 3;
306
307    class InputContentType {
308        int imeOptions = EditorInfo.IME_NULL;
309        String privateImeOptions;
310        CharSequence imeActionLabel;
311        int imeActionId;
312        Bundle extras;
313        OnEditorActionListener onEditorActionListener;
314        boolean enterDown;
315    }
316    InputContentType mInputContentType;
317
318    class InputMethodState {
319        Rect mCursorRectInWindow = new Rect();
320        RectF mTmpRectF = new RectF();
321        float[] mTmpOffset = new float[2];
322        ExtractedTextRequest mExtracting;
323        final ExtractedText mTmpExtracted = new ExtractedText();
324        int mBatchEditNesting;
325        boolean mCursorChanged;
326        boolean mSelectionModeChanged;
327        boolean mContentChanged;
328        int mChangedStart, mChangedEnd, mChangedDelta;
329    }
330    InputMethodState mInputMethodState;
331
332    private int mTextSelectHandleLeftRes;
333    private int mTextSelectHandleRightRes;
334    private int mTextSelectHandleRes;
335
336    private int mTextEditSuggestionItemLayout;
337    private SuggestionsPopupWindow mSuggestionsPopupWindow;
338    private SuggestionRangeSpan mSuggestionRangeSpan;
339
340    private int mCursorDrawableRes;
341    private final Drawable[] mCursorDrawable = new Drawable[2];
342    private int mCursorCount; // Actual current number of used mCursorDrawable: 0, 1 or 2
343
344    private Drawable mSelectHandleLeft;
345    private Drawable mSelectHandleRight;
346    private Drawable mSelectHandleCenter;
347
348    // Global listener that detects changes in the global position of the TextView
349    private PositionListener mPositionListener;
350
351    private float mLastDownPositionX, mLastDownPositionY;
352    private Callback mCustomSelectionActionModeCallback;
353
354    private final int mSquaredTouchSlopDistance;
355    // Set when this TextView gained focus with some text selected. Will start selection mode.
356    private boolean mCreatedWithASelection = false;
357
358    private WordIterator mWordIterator;
359
360    private SpellChecker mSpellChecker;
361
362    private boolean mSoftInputShownOnFocus = true;
363
364    // The alignment to pass to Layout, or null if not resolved.
365    private Layout.Alignment mLayoutAlignment;
366
367    // The default value for mTextAlign.
368    private TextAlign mTextAlign = TextAlign.INHERIT;
369
370    private static enum TextAlign {
371        INHERIT, GRAVITY, TEXT_START, TEXT_END, CENTER, VIEW_START, VIEW_END;
372    }
373
374    private boolean mResolvedDrawables = false;
375
376    /**
377     * On some devices the fading edges add a performance penalty if used
378     * extensively in the same layout. This mode indicates how the marquee
379     * is currently being shown, if applicable. (mEllipsize will == MARQUEE)
380     */
381    private int mMarqueeFadeMode = MARQUEE_FADE_NORMAL;
382
383    /**
384     * When mMarqueeFadeMode is not MARQUEE_FADE_NORMAL, this stores
385     * the layout that should be used when the mode switches.
386     */
387    private Layout mSavedMarqueeModeLayout;
388
389    /**
390     * Draw marquee text with fading edges as usual
391     */
392    private static final int MARQUEE_FADE_NORMAL = 0;
393
394    /**
395     * Draw marquee text as ellipsize end while inactive instead of with the fade.
396     * (Useful for devices where the fade can be expensive if overdone)
397     */
398    private static final int MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS = 1;
399
400    /**
401     * Draw marquee text with fading edges because it is currently active/animating.
402     */
403    private static final int MARQUEE_FADE_SWITCH_SHOW_FADE = 2;
404
405    /*
406     * Kick-start the font cache for the zygote process (to pay the cost of
407     * initializing freetype for our default font only once).
408     */
409    static {
410        Paint p = new Paint();
411        p.setAntiAlias(true);
412        // We don't care about the result, just the side-effect of measuring.
413        p.measureText("H");
414    }
415
416    /**
417     * Interface definition for a callback to be invoked when an action is
418     * performed on the editor.
419     */
420    public interface OnEditorActionListener {
421        /**
422         * Called when an action is being performed.
423         *
424         * @param v The view that was clicked.
425         * @param actionId Identifier of the action.  This will be either the
426         * identifier you supplied, or {@link EditorInfo#IME_NULL
427         * EditorInfo.IME_NULL} if being called due to the enter key
428         * being pressed.
429         * @param event If triggered by an enter key, this is the event;
430         * otherwise, this is null.
431         * @return Return true if you have consumed the action, else false.
432         */
433        boolean onEditorAction(TextView v, int actionId, KeyEvent event);
434    }
435
436    public TextView(Context context) {
437        this(context, null);
438    }
439
440    public TextView(Context context,
441                    AttributeSet attrs) {
442        this(context, attrs, com.android.internal.R.attr.textViewStyle);
443    }
444
445    @SuppressWarnings("deprecation")
446    public TextView(Context context,
447                    AttributeSet attrs,
448                    int defStyle) {
449        super(context, attrs, defStyle);
450        mText = "";
451
452        mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
453        mTextPaint.density = getResources().getDisplayMetrics().density;
454        mTextPaint.setCompatibilityScaling(
455                getResources().getCompatibilityInfo().applicationScale);
456
457        // If we get the paint from the skin, we should set it to left, since
458        // the layout always wants it to be left.
459        // mTextPaint.setTextAlign(Paint.Align.LEFT);
460
461        mHighlightPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
462        mHighlightPaint.setCompatibilityScaling(
463                getResources().getCompatibilityInfo().applicationScale);
464
465        mMovement = getDefaultMovementMethod();
466        mTransformation = null;
467
468        int textColorHighlight = 0;
469        ColorStateList textColor = null;
470        ColorStateList textColorHint = null;
471        ColorStateList textColorLink = null;
472        int textSize = 15;
473        int typefaceIndex = -1;
474        int styleIndex = -1;
475        boolean allCaps = false;
476
477        final Resources.Theme theme = context.getTheme();
478
479        /*
480         * Look the appearance up without checking first if it exists because
481         * almost every TextView has one and it greatly simplifies the logic
482         * to be able to parse the appearance first and then let specific tags
483         * for this View override it.
484         */
485        TypedArray a = theme.obtainStyledAttributes(
486                    attrs, com.android.internal.R.styleable.TextViewAppearance, defStyle, 0);
487        TypedArray appearance = null;
488        int ap = a.getResourceId(
489                com.android.internal.R.styleable.TextViewAppearance_textAppearance, -1);
490        a.recycle();
491        if (ap != -1) {
492            appearance = theme.obtainStyledAttributes(
493                    ap, com.android.internal.R.styleable.TextAppearance);
494        }
495        if (appearance != null) {
496            int n = appearance.getIndexCount();
497            for (int i = 0; i < n; i++) {
498                int attr = appearance.getIndex(i);
499
500                switch (attr) {
501                case com.android.internal.R.styleable.TextAppearance_textColorHighlight:
502                    textColorHighlight = appearance.getColor(attr, textColorHighlight);
503                    break;
504
505                case com.android.internal.R.styleable.TextAppearance_textColor:
506                    textColor = appearance.getColorStateList(attr);
507                    break;
508
509                case com.android.internal.R.styleable.TextAppearance_textColorHint:
510                    textColorHint = appearance.getColorStateList(attr);
511                    break;
512
513                case com.android.internal.R.styleable.TextAppearance_textColorLink:
514                    textColorLink = appearance.getColorStateList(attr);
515                    break;
516
517                case com.android.internal.R.styleable.TextAppearance_textSize:
518                    textSize = appearance.getDimensionPixelSize(attr, textSize);
519                    break;
520
521                case com.android.internal.R.styleable.TextAppearance_typeface:
522                    typefaceIndex = appearance.getInt(attr, -1);
523                    break;
524
525                case com.android.internal.R.styleable.TextAppearance_textStyle:
526                    styleIndex = appearance.getInt(attr, -1);
527                    break;
528
529                case com.android.internal.R.styleable.TextAppearance_textAllCaps:
530                    allCaps = appearance.getBoolean(attr, false);
531                    break;
532                }
533            }
534
535            appearance.recycle();
536        }
537
538        boolean editable = getDefaultEditable();
539        CharSequence inputMethod = null;
540        int numeric = 0;
541        CharSequence digits = null;
542        boolean phone = false;
543        boolean autotext = false;
544        int autocap = -1;
545        int buffertype = 0;
546        boolean selectallonfocus = false;
547        Drawable drawableLeft = null, drawableTop = null, drawableRight = null,
548            drawableBottom = null, drawableStart = null, drawableEnd = null;
549        int drawablePadding = 0;
550        int ellipsize = -1;
551        boolean singleLine = false;
552        int maxlength = -1;
553        CharSequence text = "";
554        CharSequence hint = null;
555        int shadowcolor = 0;
556        float dx = 0, dy = 0, r = 0;
557        boolean password = false;
558        int inputType = EditorInfo.TYPE_NULL;
559
560        a = theme.obtainStyledAttributes(
561                    attrs, com.android.internal.R.styleable.TextView, defStyle, 0);
562
563        int n = a.getIndexCount();
564        for (int i = 0; i < n; i++) {
565            int attr = a.getIndex(i);
566
567            switch (attr) {
568            case com.android.internal.R.styleable.TextView_editable:
569                editable = a.getBoolean(attr, editable);
570                break;
571
572            case com.android.internal.R.styleable.TextView_inputMethod:
573                inputMethod = a.getText(attr);
574                break;
575
576            case com.android.internal.R.styleable.TextView_numeric:
577                numeric = a.getInt(attr, numeric);
578                break;
579
580            case com.android.internal.R.styleable.TextView_digits:
581                digits = a.getText(attr);
582                break;
583
584            case com.android.internal.R.styleable.TextView_phoneNumber:
585                phone = a.getBoolean(attr, phone);
586                break;
587
588            case com.android.internal.R.styleable.TextView_autoText:
589                autotext = a.getBoolean(attr, autotext);
590                break;
591
592            case com.android.internal.R.styleable.TextView_capitalize:
593                autocap = a.getInt(attr, autocap);
594                break;
595
596            case com.android.internal.R.styleable.TextView_bufferType:
597                buffertype = a.getInt(attr, buffertype);
598                break;
599
600            case com.android.internal.R.styleable.TextView_selectAllOnFocus:
601                selectallonfocus = a.getBoolean(attr, selectallonfocus);
602                break;
603
604            case com.android.internal.R.styleable.TextView_autoLink:
605                mAutoLinkMask = a.getInt(attr, 0);
606                break;
607
608            case com.android.internal.R.styleable.TextView_linksClickable:
609                mLinksClickable = a.getBoolean(attr, true);
610                break;
611
612//            TODO uncomment when this attribute is made public in the next release
613//                 also add TextView_showSoftInputOnFocus to the list of attributes above
614//            case com.android.internal.R.styleable.TextView_showSoftInputOnFocus:
615//                setShowSoftInputOnFocus(a.getBoolean(attr, true));
616//                break;
617
618            case com.android.internal.R.styleable.TextView_drawableLeft:
619                drawableLeft = a.getDrawable(attr);
620                break;
621
622            case com.android.internal.R.styleable.TextView_drawableTop:
623                drawableTop = a.getDrawable(attr);
624                break;
625
626            case com.android.internal.R.styleable.TextView_drawableRight:
627                drawableRight = a.getDrawable(attr);
628                break;
629
630            case com.android.internal.R.styleable.TextView_drawableBottom:
631                drawableBottom = a.getDrawable(attr);
632                break;
633
634            case com.android.internal.R.styleable.TextView_drawableStart:
635                drawableStart = a.getDrawable(attr);
636                break;
637
638            case com.android.internal.R.styleable.TextView_drawableEnd:
639                drawableEnd = a.getDrawable(attr);
640                break;
641
642            case com.android.internal.R.styleable.TextView_drawablePadding:
643                drawablePadding = a.getDimensionPixelSize(attr, drawablePadding);
644                break;
645
646            case com.android.internal.R.styleable.TextView_maxLines:
647                setMaxLines(a.getInt(attr, -1));
648                break;
649
650            case com.android.internal.R.styleable.TextView_maxHeight:
651                setMaxHeight(a.getDimensionPixelSize(attr, -1));
652                break;
653
654            case com.android.internal.R.styleable.TextView_lines:
655                setLines(a.getInt(attr, -1));
656                break;
657
658            case com.android.internal.R.styleable.TextView_height:
659                setHeight(a.getDimensionPixelSize(attr, -1));
660                break;
661
662            case com.android.internal.R.styleable.TextView_minLines:
663                setMinLines(a.getInt(attr, -1));
664                break;
665
666            case com.android.internal.R.styleable.TextView_minHeight:
667                setMinHeight(a.getDimensionPixelSize(attr, -1));
668                break;
669
670            case com.android.internal.R.styleable.TextView_maxEms:
671                setMaxEms(a.getInt(attr, -1));
672                break;
673
674            case com.android.internal.R.styleable.TextView_maxWidth:
675                setMaxWidth(a.getDimensionPixelSize(attr, -1));
676                break;
677
678            case com.android.internal.R.styleable.TextView_ems:
679                setEms(a.getInt(attr, -1));
680                break;
681
682            case com.android.internal.R.styleable.TextView_width:
683                setWidth(a.getDimensionPixelSize(attr, -1));
684                break;
685
686            case com.android.internal.R.styleable.TextView_minEms:
687                setMinEms(a.getInt(attr, -1));
688                break;
689
690            case com.android.internal.R.styleable.TextView_minWidth:
691                setMinWidth(a.getDimensionPixelSize(attr, -1));
692                break;
693
694            case com.android.internal.R.styleable.TextView_gravity:
695                setGravity(a.getInt(attr, -1));
696                break;
697
698            case com.android.internal.R.styleable.TextView_hint:
699                hint = a.getText(attr);
700                break;
701
702            case com.android.internal.R.styleable.TextView_text:
703                text = a.getText(attr);
704                break;
705
706            case com.android.internal.R.styleable.TextView_scrollHorizontally:
707                if (a.getBoolean(attr, false)) {
708                    setHorizontallyScrolling(true);
709                }
710                break;
711
712            case com.android.internal.R.styleable.TextView_singleLine:
713                singleLine = a.getBoolean(attr, singleLine);
714                break;
715
716            case com.android.internal.R.styleable.TextView_ellipsize:
717                ellipsize = a.getInt(attr, ellipsize);
718                break;
719
720            case com.android.internal.R.styleable.TextView_marqueeRepeatLimit:
721                setMarqueeRepeatLimit(a.getInt(attr, mMarqueeRepeatLimit));
722                break;
723
724            case com.android.internal.R.styleable.TextView_includeFontPadding:
725                if (!a.getBoolean(attr, true)) {
726                    setIncludeFontPadding(false);
727                }
728                break;
729
730            case com.android.internal.R.styleable.TextView_cursorVisible:
731                if (!a.getBoolean(attr, true)) {
732                    setCursorVisible(false);
733                }
734                break;
735
736            case com.android.internal.R.styleable.TextView_maxLength:
737                maxlength = a.getInt(attr, -1);
738                break;
739
740            case com.android.internal.R.styleable.TextView_textScaleX:
741                setTextScaleX(a.getFloat(attr, 1.0f));
742                break;
743
744            case com.android.internal.R.styleable.TextView_freezesText:
745                mFreezesText = a.getBoolean(attr, false);
746                break;
747
748            case com.android.internal.R.styleable.TextView_shadowColor:
749                shadowcolor = a.getInt(attr, 0);
750                break;
751
752            case com.android.internal.R.styleable.TextView_shadowDx:
753                dx = a.getFloat(attr, 0);
754                break;
755
756            case com.android.internal.R.styleable.TextView_shadowDy:
757                dy = a.getFloat(attr, 0);
758                break;
759
760            case com.android.internal.R.styleable.TextView_shadowRadius:
761                r = a.getFloat(attr, 0);
762                break;
763
764            case com.android.internal.R.styleable.TextView_enabled:
765                setEnabled(a.getBoolean(attr, isEnabled()));
766                break;
767
768            case com.android.internal.R.styleable.TextView_textColorHighlight:
769                textColorHighlight = a.getColor(attr, textColorHighlight);
770                break;
771
772            case com.android.internal.R.styleable.TextView_textColor:
773                textColor = a.getColorStateList(attr);
774                break;
775
776            case com.android.internal.R.styleable.TextView_textColorHint:
777                textColorHint = a.getColorStateList(attr);
778                break;
779
780            case com.android.internal.R.styleable.TextView_textColorLink:
781                textColorLink = a.getColorStateList(attr);
782                break;
783
784            case com.android.internal.R.styleable.TextView_textSize:
785                textSize = a.getDimensionPixelSize(attr, textSize);
786                break;
787
788            case com.android.internal.R.styleable.TextView_typeface:
789                typefaceIndex = a.getInt(attr, typefaceIndex);
790                break;
791
792            case com.android.internal.R.styleable.TextView_textStyle:
793                styleIndex = a.getInt(attr, styleIndex);
794                break;
795
796            case com.android.internal.R.styleable.TextView_password:
797                password = a.getBoolean(attr, password);
798                break;
799
800            case com.android.internal.R.styleable.TextView_lineSpacingExtra:
801                mSpacingAdd = a.getDimensionPixelSize(attr, (int) mSpacingAdd);
802                break;
803
804            case com.android.internal.R.styleable.TextView_lineSpacingMultiplier:
805                mSpacingMult = a.getFloat(attr, mSpacingMult);
806                break;
807
808            case com.android.internal.R.styleable.TextView_inputType:
809                inputType = a.getInt(attr, mInputType);
810                break;
811
812            case com.android.internal.R.styleable.TextView_imeOptions:
813                if (mInputContentType == null) {
814                    mInputContentType = new InputContentType();
815                }
816                mInputContentType.imeOptions = a.getInt(attr,
817                        mInputContentType.imeOptions);
818                break;
819
820            case com.android.internal.R.styleable.TextView_imeActionLabel:
821                if (mInputContentType == null) {
822                    mInputContentType = new InputContentType();
823                }
824                mInputContentType.imeActionLabel = a.getText(attr);
825                break;
826
827            case com.android.internal.R.styleable.TextView_imeActionId:
828                if (mInputContentType == null) {
829                    mInputContentType = new InputContentType();
830                }
831                mInputContentType.imeActionId = a.getInt(attr,
832                        mInputContentType.imeActionId);
833                break;
834
835            case com.android.internal.R.styleable.TextView_privateImeOptions:
836                setPrivateImeOptions(a.getString(attr));
837                break;
838
839            case com.android.internal.R.styleable.TextView_editorExtras:
840                try {
841                    setInputExtras(a.getResourceId(attr, 0));
842                } catch (XmlPullParserException e) {
843                    Log.w(LOG_TAG, "Failure reading input extras", e);
844                } catch (IOException e) {
845                    Log.w(LOG_TAG, "Failure reading input extras", e);
846                }
847                break;
848
849            case com.android.internal.R.styleable.TextView_textCursorDrawable:
850                mCursorDrawableRes = a.getResourceId(attr, 0);
851                break;
852
853            case com.android.internal.R.styleable.TextView_textSelectHandleLeft:
854                mTextSelectHandleLeftRes = a.getResourceId(attr, 0);
855                break;
856
857            case com.android.internal.R.styleable.TextView_textSelectHandleRight:
858                mTextSelectHandleRightRes = a.getResourceId(attr, 0);
859                break;
860
861            case com.android.internal.R.styleable.TextView_textSelectHandle:
862                mTextSelectHandleRes = a.getResourceId(attr, 0);
863                break;
864
865            case com.android.internal.R.styleable.TextView_textEditSuggestionItemLayout:
866                mTextEditSuggestionItemLayout = a.getResourceId(attr, 0);
867                break;
868
869            case com.android.internal.R.styleable.TextView_textIsSelectable:
870                mTextIsSelectable = a.getBoolean(attr, false);
871                break;
872
873            case com.android.internal.R.styleable.TextView_textAllCaps:
874                allCaps = a.getBoolean(attr, false);
875                break;
876            }
877        }
878        a.recycle();
879
880        BufferType bufferType = BufferType.EDITABLE;
881
882        final int variation =
883                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
884        final boolean passwordInputType = variation
885                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD);
886        final boolean webPasswordInputType = variation
887                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD);
888        final boolean numberPasswordInputType = variation
889                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
890
891        if (inputMethod != null) {
892            Class<?> c;
893
894            try {
895                c = Class.forName(inputMethod.toString());
896            } catch (ClassNotFoundException ex) {
897                throw new RuntimeException(ex);
898            }
899
900            try {
901                mInput = (KeyListener) c.newInstance();
902            } catch (InstantiationException ex) {
903                throw new RuntimeException(ex);
904            } catch (IllegalAccessException ex) {
905                throw new RuntimeException(ex);
906            }
907            try {
908                mInputType = inputType != EditorInfo.TYPE_NULL
909                        ? inputType
910                        : mInput.getInputType();
911            } catch (IncompatibleClassChangeError e) {
912                mInputType = EditorInfo.TYPE_CLASS_TEXT;
913            }
914        } else if (digits != null) {
915            mInput = DigitsKeyListener.getInstance(digits.toString());
916            // If no input type was specified, we will default to generic
917            // text, since we can't tell the IME about the set of digits
918            // that was selected.
919            mInputType = inputType != EditorInfo.TYPE_NULL
920                    ? inputType : EditorInfo.TYPE_CLASS_TEXT;
921        } else if (inputType != EditorInfo.TYPE_NULL) {
922            setInputType(inputType, true);
923            // If set, the input type overrides what was set using the deprecated singleLine flag.
924            singleLine = !isMultilineInputType(inputType);
925        } else if (phone) {
926            mInput = DialerKeyListener.getInstance();
927            mInputType = inputType = EditorInfo.TYPE_CLASS_PHONE;
928        } else if (numeric != 0) {
929            mInput = DigitsKeyListener.getInstance((numeric & SIGNED) != 0,
930                                                   (numeric & DECIMAL) != 0);
931            inputType = EditorInfo.TYPE_CLASS_NUMBER;
932            if ((numeric & SIGNED) != 0) {
933                inputType |= EditorInfo.TYPE_NUMBER_FLAG_SIGNED;
934            }
935            if ((numeric & DECIMAL) != 0) {
936                inputType |= EditorInfo.TYPE_NUMBER_FLAG_DECIMAL;
937            }
938            mInputType = inputType;
939        } else if (autotext || autocap != -1) {
940            TextKeyListener.Capitalize cap;
941
942            inputType = EditorInfo.TYPE_CLASS_TEXT;
943
944            switch (autocap) {
945            case 1:
946                cap = TextKeyListener.Capitalize.SENTENCES;
947                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES;
948                break;
949
950            case 2:
951                cap = TextKeyListener.Capitalize.WORDS;
952                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS;
953                break;
954
955            case 3:
956                cap = TextKeyListener.Capitalize.CHARACTERS;
957                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS;
958                break;
959
960            default:
961                cap = TextKeyListener.Capitalize.NONE;
962                break;
963            }
964
965            mInput = TextKeyListener.getInstance(autotext, cap);
966            mInputType = inputType;
967        } else if (mTextIsSelectable) {
968            // Prevent text changes from keyboard.
969            mInputType = EditorInfo.TYPE_NULL;
970            mInput = null;
971            bufferType = BufferType.SPANNABLE;
972            // Required to request focus while in touch mode.
973            setFocusableInTouchMode(true);
974            // So that selection can be changed using arrow keys and touch is handled.
975            setMovementMethod(ArrowKeyMovementMethod.getInstance());
976        } else if (editable) {
977            mInput = TextKeyListener.getInstance();
978            mInputType = EditorInfo.TYPE_CLASS_TEXT;
979        } else {
980            mInput = null;
981
982            switch (buffertype) {
983                case 0:
984                    bufferType = BufferType.NORMAL;
985                    break;
986                case 1:
987                    bufferType = BufferType.SPANNABLE;
988                    break;
989                case 2:
990                    bufferType = BufferType.EDITABLE;
991                    break;
992            }
993        }
994
995        // mInputType has been set from inputType, possibly modified by mInputMethod.
996        // Specialize mInputType to [web]password if we have a text class and the original input
997        // type was a password.
998        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
999            if (password || passwordInputType) {
1000                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
1001                        | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD;
1002            }
1003            if (webPasswordInputType) {
1004                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
1005                        | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD;
1006            }
1007        } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) {
1008            if (numberPasswordInputType) {
1009                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
1010                        | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD;
1011            }
1012        }
1013
1014        if (selectallonfocus) {
1015            mSelectAllOnFocus = true;
1016
1017            if (bufferType == BufferType.NORMAL)
1018                bufferType = BufferType.SPANNABLE;
1019        }
1020
1021        setCompoundDrawablesWithIntrinsicBounds(
1022            drawableLeft, drawableTop, drawableRight, drawableBottom);
1023        setRelativeDrawablesIfNeeded(drawableStart, drawableEnd);
1024        setCompoundDrawablePadding(drawablePadding);
1025
1026        // Same as setSingleLine(), but make sure the transformation method and the maximum number
1027        // of lines of height are unchanged for multi-line TextViews.
1028        setInputTypeSingleLine(singleLine);
1029        applySingleLine(singleLine, singleLine, singleLine);
1030
1031        if (singleLine && mInput == null && ellipsize < 0) {
1032                ellipsize = 3; // END
1033        }
1034
1035        switch (ellipsize) {
1036            case 1:
1037                setEllipsize(TextUtils.TruncateAt.START);
1038                break;
1039            case 2:
1040                setEllipsize(TextUtils.TruncateAt.MIDDLE);
1041                break;
1042            case 3:
1043                setEllipsize(TextUtils.TruncateAt.END);
1044                break;
1045            case 4:
1046                if (ViewConfiguration.get(context).isFadingMarqueeEnabled()) {
1047                    setHorizontalFadingEdgeEnabled(true);
1048                    mMarqueeFadeMode = MARQUEE_FADE_NORMAL;
1049                } else {
1050                    setHorizontalFadingEdgeEnabled(false);
1051                    mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
1052                }
1053                setEllipsize(TextUtils.TruncateAt.MARQUEE);
1054                break;
1055        }
1056
1057        setTextColor(textColor != null ? textColor : ColorStateList.valueOf(0xFF000000));
1058        setHintTextColor(textColorHint);
1059        setLinkTextColor(textColorLink);
1060        if (textColorHighlight != 0) {
1061            setHighlightColor(textColorHighlight);
1062        }
1063        setRawTextSize(textSize);
1064
1065        if (allCaps) {
1066            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
1067        }
1068
1069        if (password || passwordInputType || webPasswordInputType || numberPasswordInputType) {
1070            setTransformationMethod(PasswordTransformationMethod.getInstance());
1071            typefaceIndex = MONOSPACE;
1072        } else if ((mInputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION))
1073                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)) {
1074            typefaceIndex = MONOSPACE;
1075        }
1076
1077        setTypefaceByIndex(typefaceIndex, styleIndex);
1078
1079        if (shadowcolor != 0) {
1080            setShadowLayer(r, dx, dy, shadowcolor);
1081        }
1082
1083        if (maxlength >= 0) {
1084            setFilters(new InputFilter[] { new InputFilter.LengthFilter(maxlength) });
1085        } else {
1086            setFilters(NO_FILTERS);
1087        }
1088
1089        setText(text, bufferType);
1090        if (hint != null) setHint(hint);
1091
1092        /*
1093         * Views are not normally focusable unless specified to be.
1094         * However, TextViews that have input or movement methods *are*
1095         * focusable by default.
1096         */
1097        a = context.obtainStyledAttributes(attrs,
1098                                           com.android.internal.R.styleable.View,
1099                                           defStyle, 0);
1100
1101        boolean focusable = mMovement != null || mInput != null;
1102        boolean clickable = focusable;
1103        boolean longClickable = focusable;
1104
1105        n = a.getIndexCount();
1106        for (int i = 0; i < n; i++) {
1107            int attr = a.getIndex(i);
1108
1109            switch (attr) {
1110            case com.android.internal.R.styleable.View_focusable:
1111                focusable = a.getBoolean(attr, focusable);
1112                break;
1113
1114            case com.android.internal.R.styleable.View_clickable:
1115                clickable = a.getBoolean(attr, clickable);
1116                break;
1117
1118            case com.android.internal.R.styleable.View_longClickable:
1119                longClickable = a.getBoolean(attr, longClickable);
1120                break;
1121            }
1122        }
1123        a.recycle();
1124
1125        setFocusable(focusable);
1126        setClickable(clickable);
1127        setLongClickable(longClickable);
1128
1129        prepareCursorControllers();
1130
1131        final ViewConfiguration viewConfiguration = ViewConfiguration.get(context);
1132        final int touchSlop = viewConfiguration.getScaledTouchSlop();
1133        mSquaredTouchSlopDistance = touchSlop * touchSlop;
1134    }
1135
1136    private void setTypefaceByIndex(int typefaceIndex, int styleIndex) {
1137        Typeface tf = null;
1138        switch (typefaceIndex) {
1139            case SANS:
1140                tf = Typeface.SANS_SERIF;
1141                break;
1142
1143            case SERIF:
1144                tf = Typeface.SERIF;
1145                break;
1146
1147            case MONOSPACE:
1148                tf = Typeface.MONOSPACE;
1149                break;
1150        }
1151
1152        setTypeface(tf, styleIndex);
1153    }
1154
1155    private void setRelativeDrawablesIfNeeded(Drawable start, Drawable end) {
1156        boolean hasRelativeDrawables = (start != null) || (end != null);
1157        if (hasRelativeDrawables) {
1158            Drawables dr = mDrawables;
1159            if (dr == null) {
1160                mDrawables = dr = new Drawables();
1161            }
1162            final Rect compoundRect = dr.mCompoundRect;
1163            int[] state = getDrawableState();
1164            if (start != null) {
1165                start.setBounds(0, 0, start.getIntrinsicWidth(), start.getIntrinsicHeight());
1166                start.setState(state);
1167                start.copyBounds(compoundRect);
1168                start.setCallback(this);
1169
1170                dr.mDrawableStart = start;
1171                dr.mDrawableSizeStart = compoundRect.width();
1172                dr.mDrawableHeightStart = compoundRect.height();
1173            } else {
1174                dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1175            }
1176            if (end != null) {
1177                end.setBounds(0, 0, end.getIntrinsicWidth(), end.getIntrinsicHeight());
1178                end.setState(state);
1179                end.copyBounds(compoundRect);
1180                end.setCallback(this);
1181
1182                dr.mDrawableEnd = end;
1183                dr.mDrawableSizeEnd = compoundRect.width();
1184                dr.mDrawableHeightEnd = compoundRect.height();
1185            } else {
1186                dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1187            }
1188        }
1189    }
1190
1191    @Override
1192    public void setEnabled(boolean enabled) {
1193        if (enabled == isEnabled()) {
1194            return;
1195        }
1196
1197        if (!enabled) {
1198            // Hide the soft input if the currently active TextView is disabled
1199            InputMethodManager imm = InputMethodManager.peekInstance();
1200            if (imm != null && imm.isActive(this)) {
1201                imm.hideSoftInputFromWindow(getWindowToken(), 0);
1202            }
1203        }
1204        super.setEnabled(enabled);
1205        prepareCursorControllers();
1206        if (enabled) {
1207            // Make sure IME is updated with current editor info.
1208            InputMethodManager imm = InputMethodManager.peekInstance();
1209            if (imm != null) imm.restartInput(this);
1210        }
1211
1212        // start or stop the cursor blinking as appropriate
1213        makeBlink();
1214    }
1215
1216    /**
1217     * Sets the typeface and style in which the text should be displayed,
1218     * and turns on the fake bold and italic bits in the Paint if the
1219     * Typeface that you provided does not have all the bits in the
1220     * style that you specified.
1221     *
1222     * @attr ref android.R.styleable#TextView_typeface
1223     * @attr ref android.R.styleable#TextView_textStyle
1224     */
1225    public void setTypeface(Typeface tf, int style) {
1226        if (style > 0) {
1227            if (tf == null) {
1228                tf = Typeface.defaultFromStyle(style);
1229            } else {
1230                tf = Typeface.create(tf, style);
1231            }
1232
1233            setTypeface(tf);
1234            // now compute what (if any) algorithmic styling is needed
1235            int typefaceStyle = tf != null ? tf.getStyle() : 0;
1236            int need = style & ~typefaceStyle;
1237            mTextPaint.setFakeBoldText((need & Typeface.BOLD) != 0);
1238            mTextPaint.setTextSkewX((need & Typeface.ITALIC) != 0 ? -0.25f : 0);
1239        } else {
1240            mTextPaint.setFakeBoldText(false);
1241            mTextPaint.setTextSkewX(0);
1242            setTypeface(tf);
1243        }
1244    }
1245
1246    /**
1247     * Subclasses override this to specify that they have a KeyListener
1248     * by default even if not specifically called for in the XML options.
1249     */
1250    protected boolean getDefaultEditable() {
1251        return false;
1252    }
1253
1254    /**
1255     * Subclasses override this to specify a default movement method.
1256     */
1257    protected MovementMethod getDefaultMovementMethod() {
1258        return null;
1259    }
1260
1261    /**
1262     * Return the text the TextView is displaying. If setText() was called with
1263     * an argument of BufferType.SPANNABLE or BufferType.EDITABLE, you can cast
1264     * the return value from this method to Spannable or Editable, respectively.
1265     *
1266     * Note: The content of the return value should not be modified. If you want
1267     * a modifiable one, you should make your own copy first.
1268     */
1269    @ViewDebug.CapturedViewProperty
1270    public CharSequence getText() {
1271        return mText;
1272    }
1273
1274    /**
1275     * Returns the length, in characters, of the text managed by this TextView
1276     */
1277    public int length() {
1278        return mText.length();
1279    }
1280
1281    /**
1282     * Return the text the TextView is displaying as an Editable object.  If
1283     * the text is not editable, null is returned.
1284     *
1285     * @see #getText
1286     */
1287    public Editable getEditableText() {
1288        return (mText instanceof Editable) ? (Editable)mText : null;
1289    }
1290
1291    /**
1292     * @return the height of one standard line in pixels.  Note that markup
1293     * within the text can cause individual lines to be taller or shorter
1294     * than this height, and the layout may contain additional first-
1295     * or last-line padding.
1296     */
1297    public int getLineHeight() {
1298        return FastMath.round(mTextPaint.getFontMetricsInt(null) * mSpacingMult + mSpacingAdd);
1299    }
1300
1301    /**
1302     * @return the Layout that is currently being used to display the text.
1303     * This can be null if the text or width has recently changes.
1304     */
1305    public final Layout getLayout() {
1306        return mLayout;
1307    }
1308
1309    /**
1310     * @return the current key listener for this TextView.
1311     * This will frequently be null for non-EditText TextViews.
1312     */
1313    public final KeyListener getKeyListener() {
1314        return mInput;
1315    }
1316
1317    /**
1318     * Sets the key listener to be used with this TextView.  This can be null
1319     * to disallow user input.  Note that this method has significant and
1320     * subtle interactions with soft keyboards and other input method:
1321     * see {@link KeyListener#getInputType() KeyListener.getContentType()}
1322     * for important details.  Calling this method will replace the current
1323     * content type of the text view with the content type returned by the
1324     * key listener.
1325     * <p>
1326     * Be warned that if you want a TextView with a key listener or movement
1327     * method not to be focusable, or if you want a TextView without a
1328     * key listener or movement method to be focusable, you must call
1329     * {@link #setFocusable} again after calling this to get the focusability
1330     * back the way you want it.
1331     *
1332     * @attr ref android.R.styleable#TextView_numeric
1333     * @attr ref android.R.styleable#TextView_digits
1334     * @attr ref android.R.styleable#TextView_phoneNumber
1335     * @attr ref android.R.styleable#TextView_inputMethod
1336     * @attr ref android.R.styleable#TextView_capitalize
1337     * @attr ref android.R.styleable#TextView_autoText
1338     */
1339    public void setKeyListener(KeyListener input) {
1340        setKeyListenerOnly(input);
1341        fixFocusableAndClickableSettings();
1342
1343        if (input != null) {
1344            try {
1345                mInputType = mInput.getInputType();
1346            } catch (IncompatibleClassChangeError e) {
1347                mInputType = EditorInfo.TYPE_CLASS_TEXT;
1348            }
1349            // Change inputType, without affecting transformation.
1350            // No need to applySingleLine since mSingleLine is unchanged.
1351            setInputTypeSingleLine(mSingleLine);
1352        } else {
1353            mInputType = EditorInfo.TYPE_NULL;
1354        }
1355
1356        InputMethodManager imm = InputMethodManager.peekInstance();
1357        if (imm != null) imm.restartInput(this);
1358    }
1359
1360    private void setKeyListenerOnly(KeyListener input) {
1361        mInput = input;
1362        if (mInput != null && !(mText instanceof Editable))
1363            setText(mText);
1364
1365        setFilters((Editable) mText, mFilters);
1366    }
1367
1368    /**
1369     * @return the movement method being used for this TextView.
1370     * This will frequently be null for non-EditText TextViews.
1371     */
1372    public final MovementMethod getMovementMethod() {
1373        return mMovement;
1374    }
1375
1376    /**
1377     * Sets the movement method (arrow key handler) to be used for
1378     * this TextView.  This can be null to disallow using the arrow keys
1379     * to move the cursor or scroll the view.
1380     * <p>
1381     * Be warned that if you want a TextView with a key listener or movement
1382     * method not to be focusable, or if you want a TextView without a
1383     * key listener or movement method to be focusable, you must call
1384     * {@link #setFocusable} again after calling this to get the focusability
1385     * back the way you want it.
1386     */
1387    public final void setMovementMethod(MovementMethod movement) {
1388        mMovement = movement;
1389
1390        if (mMovement != null && !(mText instanceof Spannable))
1391            setText(mText);
1392
1393        fixFocusableAndClickableSettings();
1394
1395        // SelectionModifierCursorController depends on textCanBeSelected, which depends on mMovement
1396        prepareCursorControllers();
1397    }
1398
1399    private void fixFocusableAndClickableSettings() {
1400        if ((mMovement != null) || mInput != null) {
1401            setFocusable(true);
1402            setClickable(true);
1403            setLongClickable(true);
1404        } else {
1405            setFocusable(false);
1406            setClickable(false);
1407            setLongClickable(false);
1408        }
1409    }
1410
1411    /**
1412     * @return the current transformation method for this TextView.
1413     * This will frequently be null except for single-line and password
1414     * fields.
1415     */
1416    public final TransformationMethod getTransformationMethod() {
1417        return mTransformation;
1418    }
1419
1420    /**
1421     * Sets the transformation that is applied to the text that this
1422     * TextView is displaying.
1423     *
1424     * @attr ref android.R.styleable#TextView_password
1425     * @attr ref android.R.styleable#TextView_singleLine
1426     */
1427    public final void setTransformationMethod(TransformationMethod method) {
1428        if (method == mTransformation) {
1429            // Avoid the setText() below if the transformation is
1430            // the same.
1431            return;
1432        }
1433        if (mTransformation != null) {
1434            if (mText instanceof Spannable) {
1435                ((Spannable) mText).removeSpan(mTransformation);
1436            }
1437        }
1438
1439        mTransformation = method;
1440
1441        if (method instanceof TransformationMethod2) {
1442            TransformationMethod2 method2 = (TransformationMethod2) method;
1443            mAllowTransformationLengthChange = !mTextIsSelectable && !(mText instanceof Editable);
1444            method2.setLengthChangesAllowed(mAllowTransformationLengthChange);
1445        } else {
1446            mAllowTransformationLengthChange = false;
1447        }
1448
1449        setText(mText);
1450    }
1451
1452    /**
1453     * Returns the top padding of the view, plus space for the top
1454     * Drawable if any.
1455     */
1456    public int getCompoundPaddingTop() {
1457        final Drawables dr = mDrawables;
1458        if (dr == null || dr.mDrawableTop == null) {
1459            return mPaddingTop;
1460        } else {
1461            return mPaddingTop + dr.mDrawablePadding + dr.mDrawableSizeTop;
1462        }
1463    }
1464
1465    /**
1466     * Returns the bottom padding of the view, plus space for the bottom
1467     * Drawable if any.
1468     */
1469    public int getCompoundPaddingBottom() {
1470        final Drawables dr = mDrawables;
1471        if (dr == null || dr.mDrawableBottom == null) {
1472            return mPaddingBottom;
1473        } else {
1474            return mPaddingBottom + dr.mDrawablePadding + dr.mDrawableSizeBottom;
1475        }
1476    }
1477
1478    /**
1479     * Returns the left padding of the view, plus space for the left
1480     * Drawable if any.
1481     */
1482    public int getCompoundPaddingLeft() {
1483        final Drawables dr = mDrawables;
1484        if (dr == null || dr.mDrawableLeft == null) {
1485            return mPaddingLeft;
1486        } else {
1487            return mPaddingLeft + dr.mDrawablePadding + dr.mDrawableSizeLeft;
1488        }
1489    }
1490
1491    /**
1492     * Returns the right padding of the view, plus space for the right
1493     * Drawable if any.
1494     */
1495    public int getCompoundPaddingRight() {
1496        final Drawables dr = mDrawables;
1497        if (dr == null || dr.mDrawableRight == null) {
1498            return mPaddingRight;
1499        } else {
1500            return mPaddingRight + dr.mDrawablePadding + dr.mDrawableSizeRight;
1501        }
1502    }
1503
1504    /**
1505     * Returns the start padding of the view, plus space for the start
1506     * Drawable if any.
1507     *
1508     * @hide
1509     */
1510    public int getCompoundPaddingStart() {
1511        resolveDrawables();
1512        switch(getResolvedLayoutDirection()) {
1513            default:
1514            case LAYOUT_DIRECTION_LTR:
1515                return getCompoundPaddingLeft();
1516            case LAYOUT_DIRECTION_RTL:
1517                return getCompoundPaddingRight();
1518        }
1519    }
1520
1521    /**
1522     * Returns the end padding of the view, plus space for the end
1523     * Drawable if any.
1524     *
1525     * @hide
1526     */
1527    public int getCompoundPaddingEnd() {
1528        resolveDrawables();
1529        switch(getResolvedLayoutDirection()) {
1530            default:
1531            case LAYOUT_DIRECTION_LTR:
1532                return getCompoundPaddingRight();
1533            case LAYOUT_DIRECTION_RTL:
1534                return getCompoundPaddingLeft();
1535        }
1536    }
1537
1538    /**
1539     * Returns the extended top padding of the view, including both the
1540     * top Drawable if any and any extra space to keep more than maxLines
1541     * of text from showing.  It is only valid to call this after measuring.
1542     */
1543    public int getExtendedPaddingTop() {
1544        if (mMaxMode != LINES) {
1545            return getCompoundPaddingTop();
1546        }
1547
1548        if (mLayout.getLineCount() <= mMaximum) {
1549            return getCompoundPaddingTop();
1550        }
1551
1552        int top = getCompoundPaddingTop();
1553        int bottom = getCompoundPaddingBottom();
1554        int viewht = getHeight() - top - bottom;
1555        int layoutht = mLayout.getLineTop(mMaximum);
1556
1557        if (layoutht >= viewht) {
1558            return top;
1559        }
1560
1561        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1562        if (gravity == Gravity.TOP) {
1563            return top;
1564        } else if (gravity == Gravity.BOTTOM) {
1565            return top + viewht - layoutht;
1566        } else { // (gravity == Gravity.CENTER_VERTICAL)
1567            return top + (viewht - layoutht) / 2;
1568        }
1569    }
1570
1571    /**
1572     * Returns the extended bottom padding of the view, including both the
1573     * bottom Drawable if any and any extra space to keep more than maxLines
1574     * of text from showing.  It is only valid to call this after measuring.
1575     */
1576    public int getExtendedPaddingBottom() {
1577        if (mMaxMode != LINES) {
1578            return getCompoundPaddingBottom();
1579        }
1580
1581        if (mLayout.getLineCount() <= mMaximum) {
1582            return getCompoundPaddingBottom();
1583        }
1584
1585        int top = getCompoundPaddingTop();
1586        int bottom = getCompoundPaddingBottom();
1587        int viewht = getHeight() - top - bottom;
1588        int layoutht = mLayout.getLineTop(mMaximum);
1589
1590        if (layoutht >= viewht) {
1591            return bottom;
1592        }
1593
1594        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1595        if (gravity == Gravity.TOP) {
1596            return bottom + viewht - layoutht;
1597        } else if (gravity == Gravity.BOTTOM) {
1598            return bottom;
1599        } else { // (gravity == Gravity.CENTER_VERTICAL)
1600            return bottom + (viewht - layoutht) / 2;
1601        }
1602    }
1603
1604    /**
1605     * Returns the total left padding of the view, including the left
1606     * Drawable if any.
1607     */
1608    public int getTotalPaddingLeft() {
1609        return getCompoundPaddingLeft();
1610    }
1611
1612    /**
1613     * Returns the total right padding of the view, including the right
1614     * Drawable if any.
1615     */
1616    public int getTotalPaddingRight() {
1617        return getCompoundPaddingRight();
1618    }
1619
1620    /**
1621     * Returns the total start padding of the view, including the start
1622     * Drawable if any.
1623     *
1624     * @hide
1625     */
1626    public int getTotalPaddingStart() {
1627        return getCompoundPaddingStart();
1628    }
1629
1630    /**
1631     * Returns the total end padding of the view, including the end
1632     * Drawable if any.
1633     *
1634     * @hide
1635     */
1636    public int getTotalPaddingEnd() {
1637        return getCompoundPaddingEnd();
1638    }
1639
1640    /**
1641     * Returns the total top padding of the view, including the top
1642     * Drawable if any, the extra space to keep more than maxLines
1643     * from showing, and the vertical offset for gravity, if any.
1644     */
1645    public int getTotalPaddingTop() {
1646        return getExtendedPaddingTop() + getVerticalOffset(true);
1647    }
1648
1649    /**
1650     * Returns the total bottom padding of the view, including the bottom
1651     * Drawable if any, the extra space to keep more than maxLines
1652     * from showing, and the vertical offset for gravity, if any.
1653     */
1654    public int getTotalPaddingBottom() {
1655        return getExtendedPaddingBottom() + getBottomVerticalOffset(true);
1656    }
1657
1658    /**
1659     * Sets the Drawables (if any) to appear to the left of, above,
1660     * to the right of, and below the text.  Use null if you do not
1661     * want a Drawable there.  The Drawables must already have had
1662     * {@link Drawable#setBounds} called.
1663     *
1664     * @attr ref android.R.styleable#TextView_drawableLeft
1665     * @attr ref android.R.styleable#TextView_drawableTop
1666     * @attr ref android.R.styleable#TextView_drawableRight
1667     * @attr ref android.R.styleable#TextView_drawableBottom
1668     */
1669    public void setCompoundDrawables(Drawable left, Drawable top,
1670                                     Drawable right, Drawable bottom) {
1671        Drawables dr = mDrawables;
1672
1673        final boolean drawables = left != null || top != null
1674                || right != null || bottom != null;
1675
1676        if (!drawables) {
1677            // Clearing drawables...  can we free the data structure?
1678            if (dr != null) {
1679                if (dr.mDrawablePadding == 0) {
1680                    mDrawables = null;
1681                } else {
1682                    // We need to retain the last set padding, so just clear
1683                    // out all of the fields in the existing structure.
1684                    if (dr.mDrawableLeft != null) dr.mDrawableLeft.setCallback(null);
1685                    dr.mDrawableLeft = null;
1686                    if (dr.mDrawableTop != null) dr.mDrawableTop.setCallback(null);
1687                    dr.mDrawableTop = null;
1688                    if (dr.mDrawableRight != null) dr.mDrawableRight.setCallback(null);
1689                    dr.mDrawableRight = null;
1690                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.setCallback(null);
1691                    dr.mDrawableBottom = null;
1692                    dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1693                    dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1694                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1695                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1696                }
1697            }
1698        } else {
1699            if (dr == null) {
1700                mDrawables = dr = new Drawables();
1701            }
1702
1703            if (dr.mDrawableLeft != left && dr.mDrawableLeft != null) {
1704                dr.mDrawableLeft.setCallback(null);
1705            }
1706            dr.mDrawableLeft = left;
1707
1708            if (dr.mDrawableTop != top && dr.mDrawableTop != null) {
1709                dr.mDrawableTop.setCallback(null);
1710            }
1711            dr.mDrawableTop = top;
1712
1713            if (dr.mDrawableRight != right && dr.mDrawableRight != null) {
1714                dr.mDrawableRight.setCallback(null);
1715            }
1716            dr.mDrawableRight = right;
1717
1718            if (dr.mDrawableBottom != bottom && dr.mDrawableBottom != null) {
1719                dr.mDrawableBottom.setCallback(null);
1720            }
1721            dr.mDrawableBottom = bottom;
1722
1723            final Rect compoundRect = dr.mCompoundRect;
1724            int[] state;
1725
1726            state = getDrawableState();
1727
1728            if (left != null) {
1729                left.setState(state);
1730                left.copyBounds(compoundRect);
1731                left.setCallback(this);
1732                dr.mDrawableSizeLeft = compoundRect.width();
1733                dr.mDrawableHeightLeft = compoundRect.height();
1734            } else {
1735                dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1736            }
1737
1738            if (right != null) {
1739                right.setState(state);
1740                right.copyBounds(compoundRect);
1741                right.setCallback(this);
1742                dr.mDrawableSizeRight = compoundRect.width();
1743                dr.mDrawableHeightRight = compoundRect.height();
1744            } else {
1745                dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1746            }
1747
1748            if (top != null) {
1749                top.setState(state);
1750                top.copyBounds(compoundRect);
1751                top.setCallback(this);
1752                dr.mDrawableSizeTop = compoundRect.height();
1753                dr.mDrawableWidthTop = compoundRect.width();
1754            } else {
1755                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1756            }
1757
1758            if (bottom != null) {
1759                bottom.setState(state);
1760                bottom.copyBounds(compoundRect);
1761                bottom.setCallback(this);
1762                dr.mDrawableSizeBottom = compoundRect.height();
1763                dr.mDrawableWidthBottom = compoundRect.width();
1764            } else {
1765                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1766            }
1767        }
1768
1769        invalidate();
1770        requestLayout();
1771    }
1772
1773    /**
1774     * Sets the Drawables (if any) to appear to the left of, above,
1775     * to the right of, and below the text.  Use 0 if you do not
1776     * want a Drawable there. The Drawables' bounds will be set to
1777     * their intrinsic bounds.
1778     *
1779     * @param left Resource identifier of the left Drawable.
1780     * @param top Resource identifier of the top Drawable.
1781     * @param right Resource identifier of the right Drawable.
1782     * @param bottom Resource identifier of the bottom Drawable.
1783     *
1784     * @attr ref android.R.styleable#TextView_drawableLeft
1785     * @attr ref android.R.styleable#TextView_drawableTop
1786     * @attr ref android.R.styleable#TextView_drawableRight
1787     * @attr ref android.R.styleable#TextView_drawableBottom
1788     */
1789    public void setCompoundDrawablesWithIntrinsicBounds(int left, int top, int right, int bottom) {
1790        final Resources resources = getContext().getResources();
1791        setCompoundDrawablesWithIntrinsicBounds(left != 0 ? resources.getDrawable(left) : null,
1792                top != 0 ? resources.getDrawable(top) : null,
1793                right != 0 ? resources.getDrawable(right) : null,
1794                bottom != 0 ? resources.getDrawable(bottom) : null);
1795    }
1796
1797    /**
1798     * Sets the Drawables (if any) to appear to the left of, above,
1799     * to the right of, and below the text.  Use null if you do not
1800     * want a Drawable there. The Drawables' bounds will be set to
1801     * their intrinsic bounds.
1802     *
1803     * @attr ref android.R.styleable#TextView_drawableLeft
1804     * @attr ref android.R.styleable#TextView_drawableTop
1805     * @attr ref android.R.styleable#TextView_drawableRight
1806     * @attr ref android.R.styleable#TextView_drawableBottom
1807     */
1808    public void setCompoundDrawablesWithIntrinsicBounds(Drawable left, Drawable top,
1809            Drawable right, Drawable bottom) {
1810
1811        if (left != null) {
1812            left.setBounds(0, 0, left.getIntrinsicWidth(), left.getIntrinsicHeight());
1813        }
1814        if (right != null) {
1815            right.setBounds(0, 0, right.getIntrinsicWidth(), right.getIntrinsicHeight());
1816        }
1817        if (top != null) {
1818            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
1819        }
1820        if (bottom != null) {
1821            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
1822        }
1823        setCompoundDrawables(left, top, right, bottom);
1824    }
1825
1826    /**
1827     * Sets the Drawables (if any) to appear to the start of, above,
1828     * to the end of, and below the text.  Use null if you do not
1829     * want a Drawable there.  The Drawables must already have had
1830     * {@link Drawable#setBounds} called.
1831     *
1832     * @attr ref android.R.styleable#TextView_drawableStart
1833     * @attr ref android.R.styleable#TextView_drawableTop
1834     * @attr ref android.R.styleable#TextView_drawableEnd
1835     * @attr ref android.R.styleable#TextView_drawableBottom
1836     *
1837     * @hide
1838     */
1839    public void setCompoundDrawablesRelative(Drawable start, Drawable top,
1840                                     Drawable end, Drawable bottom) {
1841        Drawables dr = mDrawables;
1842
1843        final boolean drawables = start != null || top != null
1844                || end != null || bottom != null;
1845
1846        if (!drawables) {
1847            // Clearing drawables...  can we free the data structure?
1848            if (dr != null) {
1849                if (dr.mDrawablePadding == 0) {
1850                    mDrawables = null;
1851                } else {
1852                    // We need to retain the last set padding, so just clear
1853                    // out all of the fields in the existing structure.
1854                    if (dr.mDrawableStart != null) dr.mDrawableStart.setCallback(null);
1855                    dr.mDrawableStart = null;
1856                    if (dr.mDrawableTop != null) dr.mDrawableTop.setCallback(null);
1857                    dr.mDrawableTop = null;
1858                    if (dr.mDrawableEnd != null) dr.mDrawableEnd.setCallback(null);
1859                    dr.mDrawableEnd = null;
1860                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.setCallback(null);
1861                    dr.mDrawableBottom = null;
1862                    dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1863                    dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1864                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1865                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1866                }
1867            }
1868        } else {
1869            if (dr == null) {
1870                mDrawables = dr = new Drawables();
1871            }
1872
1873            if (dr.mDrawableStart != start && dr.mDrawableStart != null) {
1874                dr.mDrawableStart.setCallback(null);
1875            }
1876            dr.mDrawableStart = start;
1877
1878            if (dr.mDrawableTop != top && dr.mDrawableTop != null) {
1879                dr.mDrawableTop.setCallback(null);
1880            }
1881            dr.mDrawableTop = top;
1882
1883            if (dr.mDrawableEnd != end && dr.mDrawableEnd != null) {
1884                dr.mDrawableEnd.setCallback(null);
1885            }
1886            dr.mDrawableEnd = end;
1887
1888            if (dr.mDrawableBottom != bottom && dr.mDrawableBottom != null) {
1889                dr.mDrawableBottom.setCallback(null);
1890            }
1891            dr.mDrawableBottom = bottom;
1892
1893            final Rect compoundRect = dr.mCompoundRect;
1894            int[] state;
1895
1896            state = getDrawableState();
1897
1898            if (start != null) {
1899                start.setState(state);
1900                start.copyBounds(compoundRect);
1901                start.setCallback(this);
1902                dr.mDrawableSizeStart = compoundRect.width();
1903                dr.mDrawableHeightStart = compoundRect.height();
1904            } else {
1905                dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1906            }
1907
1908            if (end != null) {
1909                end.setState(state);
1910                end.copyBounds(compoundRect);
1911                end.setCallback(this);
1912                dr.mDrawableSizeEnd = compoundRect.width();
1913                dr.mDrawableHeightEnd = compoundRect.height();
1914            } else {
1915                dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1916            }
1917
1918            if (top != null) {
1919                top.setState(state);
1920                top.copyBounds(compoundRect);
1921                top.setCallback(this);
1922                dr.mDrawableSizeTop = compoundRect.height();
1923                dr.mDrawableWidthTop = compoundRect.width();
1924            } else {
1925                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1926            }
1927
1928            if (bottom != null) {
1929                bottom.setState(state);
1930                bottom.copyBounds(compoundRect);
1931                bottom.setCallback(this);
1932                dr.mDrawableSizeBottom = compoundRect.height();
1933                dr.mDrawableWidthBottom = compoundRect.width();
1934            } else {
1935                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1936            }
1937        }
1938
1939        resolveDrawables();
1940        invalidate();
1941        requestLayout();
1942    }
1943
1944    /**
1945     * Sets the Drawables (if any) to appear to the start of, above,
1946     * to the end of, and below the text.  Use 0 if you do not
1947     * want a Drawable there. The Drawables' bounds will be set to
1948     * their intrinsic bounds.
1949     *
1950     * @param start Resource identifier of the start Drawable.
1951     * @param top Resource identifier of the top Drawable.
1952     * @param end Resource identifier of the end Drawable.
1953     * @param bottom Resource identifier of the bottom Drawable.
1954     *
1955     * @attr ref android.R.styleable#TextView_drawableStart
1956     * @attr ref android.R.styleable#TextView_drawableTop
1957     * @attr ref android.R.styleable#TextView_drawableEnd
1958     * @attr ref android.R.styleable#TextView_drawableBottom
1959     *
1960     * @hide
1961     */
1962    public void setCompoundDrawablesRelativeWithIntrinsicBounds(int start, int top, int end,
1963            int bottom) {
1964        resetResolvedDrawables();
1965        final Resources resources = getContext().getResources();
1966        setCompoundDrawablesRelativeWithIntrinsicBounds(
1967                start != 0 ? resources.getDrawable(start) : null,
1968                top != 0 ? resources.getDrawable(top) : null,
1969                end != 0 ? resources.getDrawable(end) : null,
1970                bottom != 0 ? resources.getDrawable(bottom) : null);
1971    }
1972
1973    /**
1974     * Sets the Drawables (if any) to appear to the start of, above,
1975     * to the end of, and below the text.  Use null if you do not
1976     * want a Drawable there. The Drawables' bounds will be set to
1977     * their intrinsic bounds.
1978     *
1979     * @attr ref android.R.styleable#TextView_drawableStart
1980     * @attr ref android.R.styleable#TextView_drawableTop
1981     * @attr ref android.R.styleable#TextView_drawableEnd
1982     * @attr ref android.R.styleable#TextView_drawableBottom
1983     *
1984     * @hide
1985     */
1986    public void setCompoundDrawablesRelativeWithIntrinsicBounds(Drawable start, Drawable top,
1987            Drawable end, Drawable bottom) {
1988
1989        resetResolvedDrawables();
1990        if (start != null) {
1991            start.setBounds(0, 0, start.getIntrinsicWidth(), start.getIntrinsicHeight());
1992        }
1993        if (end != null) {
1994            end.setBounds(0, 0, end.getIntrinsicWidth(), end.getIntrinsicHeight());
1995        }
1996        if (top != null) {
1997            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
1998        }
1999        if (bottom != null) {
2000            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
2001        }
2002        setCompoundDrawablesRelative(start, top, end, bottom);
2003    }
2004
2005    /**
2006     * Returns drawables for the left, top, right, and bottom borders.
2007     */
2008    public Drawable[] getCompoundDrawables() {
2009        final Drawables dr = mDrawables;
2010        if (dr != null) {
2011            return new Drawable[] {
2012                dr.mDrawableLeft, dr.mDrawableTop, dr.mDrawableRight, dr.mDrawableBottom
2013            };
2014        } else {
2015            return new Drawable[] { null, null, null, null };
2016        }
2017    }
2018
2019    /**
2020     * Returns drawables for the start, top, end, and bottom borders.
2021     *
2022     * @hide
2023     */
2024    public Drawable[] getCompoundDrawablesRelative() {
2025        final Drawables dr = mDrawables;
2026        if (dr != null) {
2027            return new Drawable[] {
2028                dr.mDrawableStart, dr.mDrawableTop, dr.mDrawableEnd, dr.mDrawableBottom
2029            };
2030        } else {
2031            return new Drawable[] { null, null, null, null };
2032        }
2033    }
2034
2035    /**
2036     * Sets the size of the padding between the compound drawables and
2037     * the text.
2038     *
2039     * @attr ref android.R.styleable#TextView_drawablePadding
2040     */
2041    public void setCompoundDrawablePadding(int pad) {
2042        Drawables dr = mDrawables;
2043        if (pad == 0) {
2044            if (dr != null) {
2045                dr.mDrawablePadding = pad;
2046            }
2047        } else {
2048            if (dr == null) {
2049                mDrawables = dr = new Drawables();
2050            }
2051            dr.mDrawablePadding = pad;
2052        }
2053
2054        invalidate();
2055        requestLayout();
2056    }
2057
2058    /**
2059     * Returns the padding between the compound drawables and the text.
2060     */
2061    public int getCompoundDrawablePadding() {
2062        final Drawables dr = mDrawables;
2063        return dr != null ? dr.mDrawablePadding : 0;
2064    }
2065
2066    @Override
2067    public void setPadding(int left, int top, int right, int bottom) {
2068        if (left != mPaddingLeft ||
2069            right != mPaddingRight ||
2070            top != mPaddingTop ||
2071            bottom != mPaddingBottom) {
2072            nullLayouts();
2073        }
2074
2075        // the super call will requestLayout()
2076        super.setPadding(left, top, right, bottom);
2077        invalidate();
2078    }
2079
2080    /**
2081     * Gets the autolink mask of the text.  See {@link
2082     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
2083     * possible values.
2084     *
2085     * @attr ref android.R.styleable#TextView_autoLink
2086     */
2087    public final int getAutoLinkMask() {
2088        return mAutoLinkMask;
2089    }
2090
2091    /**
2092     * Sets the text color, size, style, hint color, and highlight color
2093     * from the specified TextAppearance resource.
2094     */
2095    public void setTextAppearance(Context context, int resid) {
2096        TypedArray appearance =
2097            context.obtainStyledAttributes(resid,
2098                                           com.android.internal.R.styleable.TextAppearance);
2099
2100        int color;
2101        ColorStateList colors;
2102        int ts;
2103
2104        color = appearance.getColor(com.android.internal.R.styleable.TextAppearance_textColorHighlight, 0);
2105        if (color != 0) {
2106            setHighlightColor(color);
2107        }
2108
2109        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2110                                              TextAppearance_textColor);
2111        if (colors != null) {
2112            setTextColor(colors);
2113        }
2114
2115        ts = appearance.getDimensionPixelSize(com.android.internal.R.styleable.
2116                                              TextAppearance_textSize, 0);
2117        if (ts != 0) {
2118            setRawTextSize(ts);
2119        }
2120
2121        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2122                                              TextAppearance_textColorHint);
2123        if (colors != null) {
2124            setHintTextColor(colors);
2125        }
2126
2127        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2128                                              TextAppearance_textColorLink);
2129        if (colors != null) {
2130            setLinkTextColor(colors);
2131        }
2132
2133        int typefaceIndex, styleIndex;
2134
2135        typefaceIndex = appearance.getInt(com.android.internal.R.styleable.
2136                                          TextAppearance_typeface, -1);
2137        styleIndex = appearance.getInt(com.android.internal.R.styleable.
2138                                       TextAppearance_textStyle, -1);
2139
2140        setTypefaceByIndex(typefaceIndex, styleIndex);
2141
2142        if (appearance.getBoolean(com.android.internal.R.styleable.TextAppearance_textAllCaps,
2143                false)) {
2144            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
2145        }
2146
2147        appearance.recycle();
2148    }
2149
2150    /**
2151     * @return the size (in pixels) of the default text size in this TextView.
2152     */
2153    public float getTextSize() {
2154        return mTextPaint.getTextSize();
2155    }
2156
2157    /**
2158     * Set the default text size to the given value, interpreted as "scaled
2159     * pixel" units.  This size is adjusted based on the current density and
2160     * user font size preference.
2161     *
2162     * @param size The scaled pixel size.
2163     *
2164     * @attr ref android.R.styleable#TextView_textSize
2165     */
2166    @android.view.RemotableViewMethod
2167    public void setTextSize(float size) {
2168        setTextSize(TypedValue.COMPLEX_UNIT_SP, size);
2169    }
2170
2171    /**
2172     * Set the default text size to a given unit and value.  See {@link
2173     * TypedValue} for the possible dimension units.
2174     *
2175     * @param unit The desired dimension unit.
2176     * @param size The desired size in the given units.
2177     *
2178     * @attr ref android.R.styleable#TextView_textSize
2179     */
2180    public void setTextSize(int unit, float size) {
2181        Context c = getContext();
2182        Resources r;
2183
2184        if (c == null)
2185            r = Resources.getSystem();
2186        else
2187            r = c.getResources();
2188
2189        setRawTextSize(TypedValue.applyDimension(
2190            unit, size, r.getDisplayMetrics()));
2191    }
2192
2193    private void setRawTextSize(float size) {
2194        if (size != mTextPaint.getTextSize()) {
2195            mTextPaint.setTextSize(size);
2196
2197            if (mLayout != null) {
2198                nullLayouts();
2199                requestLayout();
2200                invalidate();
2201            }
2202        }
2203    }
2204
2205    /**
2206     * @return the extent by which text is currently being stretched
2207     * horizontally.  This will usually be 1.
2208     */
2209    public float getTextScaleX() {
2210        return mTextPaint.getTextScaleX();
2211    }
2212
2213    /**
2214     * Sets the extent by which text should be stretched horizontally.
2215     *
2216     * @attr ref android.R.styleable#TextView_textScaleX
2217     */
2218    @android.view.RemotableViewMethod
2219    public void setTextScaleX(float size) {
2220        if (size != mTextPaint.getTextScaleX()) {
2221            mUserSetTextScaleX = true;
2222            mTextPaint.setTextScaleX(size);
2223
2224            if (mLayout != null) {
2225                nullLayouts();
2226                requestLayout();
2227                invalidate();
2228            }
2229        }
2230    }
2231
2232    /**
2233     * Sets the typeface and style in which the text should be displayed.
2234     * Note that not all Typeface families actually have bold and italic
2235     * variants, so you may need to use
2236     * {@link #setTypeface(Typeface, int)} to get the appearance
2237     * that you actually want.
2238     *
2239     * @attr ref android.R.styleable#TextView_typeface
2240     * @attr ref android.R.styleable#TextView_textStyle
2241     */
2242    public void setTypeface(Typeface tf) {
2243        if (mTextPaint.getTypeface() != tf) {
2244            mTextPaint.setTypeface(tf);
2245
2246            if (mLayout != null) {
2247                nullLayouts();
2248                requestLayout();
2249                invalidate();
2250            }
2251        }
2252    }
2253
2254    /**
2255     * @return the current typeface and style in which the text is being
2256     * displayed.
2257     */
2258    public Typeface getTypeface() {
2259        return mTextPaint.getTypeface();
2260    }
2261
2262    /**
2263     * Sets the text color for all the states (normal, selected,
2264     * focused) to be this color.
2265     *
2266     * @attr ref android.R.styleable#TextView_textColor
2267     */
2268    @android.view.RemotableViewMethod
2269    public void setTextColor(int color) {
2270        mTextColor = ColorStateList.valueOf(color);
2271        updateTextColors();
2272    }
2273
2274    /**
2275     * Sets the text color.
2276     *
2277     * @attr ref android.R.styleable#TextView_textColor
2278     */
2279    public void setTextColor(ColorStateList colors) {
2280        if (colors == null) {
2281            throw new NullPointerException();
2282        }
2283
2284        mTextColor = colors;
2285        updateTextColors();
2286    }
2287
2288    /**
2289     * Return the set of text colors.
2290     *
2291     * @return Returns the set of text colors.
2292     */
2293    public final ColorStateList getTextColors() {
2294        return mTextColor;
2295    }
2296
2297    /**
2298     * <p>Return the current color selected for normal text.</p>
2299     *
2300     * @return Returns the current text color.
2301     */
2302    public final int getCurrentTextColor() {
2303        return mCurTextColor;
2304    }
2305
2306    /**
2307     * Sets the color used to display the selection highlight.
2308     *
2309     * @attr ref android.R.styleable#TextView_textColorHighlight
2310     */
2311    @android.view.RemotableViewMethod
2312    public void setHighlightColor(int color) {
2313        if (mHighlightColor != color) {
2314            mHighlightColor = color;
2315            invalidate();
2316        }
2317    }
2318
2319    /**
2320     * Gives the text a shadow of the specified radius and color, the specified
2321     * distance from its normal position.
2322     *
2323     * @attr ref android.R.styleable#TextView_shadowColor
2324     * @attr ref android.R.styleable#TextView_shadowDx
2325     * @attr ref android.R.styleable#TextView_shadowDy
2326     * @attr ref android.R.styleable#TextView_shadowRadius
2327     */
2328    public void setShadowLayer(float radius, float dx, float dy, int color) {
2329        mTextPaint.setShadowLayer(radius, dx, dy, color);
2330
2331        mShadowRadius = radius;
2332        mShadowDx = dx;
2333        mShadowDy = dy;
2334
2335        invalidate();
2336    }
2337
2338    /**
2339     * @return the base paint used for the text.  Please use this only to
2340     * consult the Paint's properties and not to change them.
2341     */
2342    public TextPaint getPaint() {
2343        return mTextPaint;
2344    }
2345
2346    /**
2347     * Sets the autolink mask of the text.  See {@link
2348     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
2349     * possible values.
2350     *
2351     * @attr ref android.R.styleable#TextView_autoLink
2352     */
2353    @android.view.RemotableViewMethod
2354    public final void setAutoLinkMask(int mask) {
2355        mAutoLinkMask = mask;
2356    }
2357
2358    /**
2359     * Sets whether the movement method will automatically be set to
2360     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
2361     * set to nonzero and links are detected in {@link #setText}.
2362     * The default is true.
2363     *
2364     * @attr ref android.R.styleable#TextView_linksClickable
2365     */
2366    @android.view.RemotableViewMethod
2367    public final void setLinksClickable(boolean whether) {
2368        mLinksClickable = whether;
2369    }
2370
2371    /**
2372     * Returns whether the movement method will automatically be set to
2373     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
2374     * set to nonzero and links are detected in {@link #setText}.
2375     * The default is true.
2376     *
2377     * @attr ref android.R.styleable#TextView_linksClickable
2378     */
2379    public final boolean getLinksClickable() {
2380        return mLinksClickable;
2381    }
2382
2383    /**
2384     * Sets whether the soft input method will be made visible when this
2385     * TextView gets focused. The default is true.
2386     *
2387     * @attr ref android.R.styleable#TextView_softInputShownOnFocus
2388     * @hide
2389     */
2390    @android.view.RemotableViewMethod
2391    public final void setSoftInputShownOnFocus(boolean show) {
2392        mSoftInputShownOnFocus = show;
2393    }
2394
2395    /**
2396     * Returns whether the soft input method will be made visible when this
2397     * TextView gets focused. The default is true.
2398     *
2399     * @attr ref android.R.styleable#TextView_softInputShownOnFocus
2400     * @hide
2401     */
2402    public final boolean getSoftInputShownOnFocus() {
2403        return mSoftInputShownOnFocus;
2404    }
2405
2406    /**
2407     * Returns the list of URLSpans attached to the text
2408     * (by {@link Linkify} or otherwise) if any.  You can call
2409     * {@link URLSpan#getURL} on them to find where they link to
2410     * or use {@link Spanned#getSpanStart} and {@link Spanned#getSpanEnd}
2411     * to find the region of the text they are attached to.
2412     */
2413    public URLSpan[] getUrls() {
2414        if (mText instanceof Spanned) {
2415            return ((Spanned) mText).getSpans(0, mText.length(), URLSpan.class);
2416        } else {
2417            return new URLSpan[0];
2418        }
2419    }
2420
2421    /**
2422     * Sets the color of the hint text.
2423     *
2424     * @attr ref android.R.styleable#TextView_textColorHint
2425     */
2426    @android.view.RemotableViewMethod
2427    public final void setHintTextColor(int color) {
2428        mHintTextColor = ColorStateList.valueOf(color);
2429        updateTextColors();
2430    }
2431
2432    /**
2433     * Sets the color of the hint text.
2434     *
2435     * @attr ref android.R.styleable#TextView_textColorHint
2436     */
2437    public final void setHintTextColor(ColorStateList colors) {
2438        mHintTextColor = colors;
2439        updateTextColors();
2440    }
2441
2442    /**
2443     * <p>Return the color used to paint the hint text.</p>
2444     *
2445     * @return Returns the list of hint text colors.
2446     */
2447    public final ColorStateList getHintTextColors() {
2448        return mHintTextColor;
2449    }
2450
2451    /**
2452     * <p>Return the current color selected to paint the hint text.</p>
2453     *
2454     * @return Returns the current hint text color.
2455     */
2456    public final int getCurrentHintTextColor() {
2457        return mHintTextColor != null ? mCurHintTextColor : mCurTextColor;
2458    }
2459
2460    /**
2461     * Sets the color of links in the text.
2462     *
2463     * @attr ref android.R.styleable#TextView_textColorLink
2464     */
2465    @android.view.RemotableViewMethod
2466    public final void setLinkTextColor(int color) {
2467        mLinkTextColor = ColorStateList.valueOf(color);
2468        updateTextColors();
2469    }
2470
2471    /**
2472     * Sets the color of links in the text.
2473     *
2474     * @attr ref android.R.styleable#TextView_textColorLink
2475     */
2476    public final void setLinkTextColor(ColorStateList colors) {
2477        mLinkTextColor = colors;
2478        updateTextColors();
2479    }
2480
2481    /**
2482     * <p>Returns the color used to paint links in the text.</p>
2483     *
2484     * @return Returns the list of link text colors.
2485     */
2486    public final ColorStateList getLinkTextColors() {
2487        return mLinkTextColor;
2488    }
2489
2490    /**
2491     * Sets the horizontal alignment of the text and the
2492     * vertical gravity that will be used when there is extra space
2493     * in the TextView beyond what is required for the text itself.
2494     *
2495     * @see android.view.Gravity
2496     * @attr ref android.R.styleable#TextView_gravity
2497     */
2498    public void setGravity(int gravity) {
2499        if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) == 0) {
2500            gravity |= Gravity.START;
2501        }
2502        if ((gravity & Gravity.VERTICAL_GRAVITY_MASK) == 0) {
2503            gravity |= Gravity.TOP;
2504        }
2505
2506        boolean newLayout = false;
2507
2508        if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) !=
2509            (mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK)) {
2510            newLayout = true;
2511        }
2512
2513        if (gravity != mGravity) {
2514            invalidate();
2515            mLayoutAlignment = null;
2516        }
2517
2518        mGravity = gravity;
2519
2520        if (mLayout != null && newLayout) {
2521            // XXX this is heavy-handed because no actual content changes.
2522            int want = mLayout.getWidth();
2523            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
2524
2525            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
2526                          mRight - mLeft - getCompoundPaddingLeft() -
2527                          getCompoundPaddingRight(), true);
2528        }
2529    }
2530
2531    /**
2532     * Returns the horizontal and vertical alignment of this TextView.
2533     *
2534     * @see android.view.Gravity
2535     * @attr ref android.R.styleable#TextView_gravity
2536     */
2537    public int getGravity() {
2538        return mGravity;
2539    }
2540
2541    /**
2542     * @return the flags on the Paint being used to display the text.
2543     * @see Paint#getFlags
2544     */
2545    public int getPaintFlags() {
2546        return mTextPaint.getFlags();
2547    }
2548
2549    /**
2550     * Sets flags on the Paint being used to display the text and
2551     * reflows the text if they are different from the old flags.
2552     * @see Paint#setFlags
2553     */
2554    @android.view.RemotableViewMethod
2555    public void setPaintFlags(int flags) {
2556        if (mTextPaint.getFlags() != flags) {
2557            mTextPaint.setFlags(flags);
2558
2559            if (mLayout != null) {
2560                nullLayouts();
2561                requestLayout();
2562                invalidate();
2563            }
2564        }
2565    }
2566
2567    /**
2568     * Sets whether the text should be allowed to be wider than the
2569     * View is.  If false, it will be wrapped to the width of the View.
2570     *
2571     * @attr ref android.R.styleable#TextView_scrollHorizontally
2572     */
2573    public void setHorizontallyScrolling(boolean whether) {
2574        if (mHorizontallyScrolling != whether) {
2575            mHorizontallyScrolling = whether;
2576
2577            if (mLayout != null) {
2578                nullLayouts();
2579                requestLayout();
2580                invalidate();
2581            }
2582        }
2583    }
2584
2585    /**
2586     * Returns whether the text is allowed to be wider than the View is.
2587     * If false, the text will be wrapped to the width of the View.
2588     *
2589     * @attr ref android.R.styleable#TextView_scrollHorizontally
2590     * @hide
2591     */
2592    public boolean getHorizontallyScrolling() {
2593        return mHorizontallyScrolling;
2594    }
2595
2596    /**
2597     * Makes the TextView at least this many lines tall.
2598     *
2599     * Setting this value overrides any other (minimum) height setting. A single line TextView will
2600     * set this value to 1.
2601     *
2602     * @attr ref android.R.styleable#TextView_minLines
2603     */
2604    @android.view.RemotableViewMethod
2605    public void setMinLines(int minlines) {
2606        mMinimum = minlines;
2607        mMinMode = LINES;
2608
2609        requestLayout();
2610        invalidate();
2611    }
2612
2613    /**
2614     * Makes the TextView at least this many pixels tall.
2615     *
2616     * Setting this value overrides any other (minimum) number of lines setting.
2617     *
2618     * @attr ref android.R.styleable#TextView_minHeight
2619     */
2620    @android.view.RemotableViewMethod
2621    public void setMinHeight(int minHeight) {
2622        mMinimum = minHeight;
2623        mMinMode = PIXELS;
2624
2625        requestLayout();
2626        invalidate();
2627    }
2628
2629    /**
2630     * Makes the TextView at most this many lines tall.
2631     *
2632     * Setting this value overrides any other (maximum) height setting.
2633     *
2634     * @attr ref android.R.styleable#TextView_maxLines
2635     */
2636    @android.view.RemotableViewMethod
2637    public void setMaxLines(int maxlines) {
2638        mMaximum = maxlines;
2639        mMaxMode = LINES;
2640
2641        requestLayout();
2642        invalidate();
2643    }
2644
2645    /**
2646     * Makes the TextView at most this many pixels tall.  This option is mutually exclusive with the
2647     * {@link #setMaxLines(int)} method.
2648     *
2649     * Setting this value overrides any other (maximum) number of lines setting.
2650     *
2651     * @attr ref android.R.styleable#TextView_maxHeight
2652     */
2653    @android.view.RemotableViewMethod
2654    public void setMaxHeight(int maxHeight) {
2655        mMaximum = maxHeight;
2656        mMaxMode = PIXELS;
2657
2658        requestLayout();
2659        invalidate();
2660    }
2661
2662    /**
2663     * Makes the TextView exactly this many lines tall.
2664     *
2665     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2666     * height setting. A single line TextView will set this value to 1.
2667     *
2668     * @attr ref android.R.styleable#TextView_lines
2669     */
2670    @android.view.RemotableViewMethod
2671    public void setLines(int lines) {
2672        mMaximum = mMinimum = lines;
2673        mMaxMode = mMinMode = LINES;
2674
2675        requestLayout();
2676        invalidate();
2677    }
2678
2679    /**
2680     * Makes the TextView exactly this many pixels tall.
2681     * You could do the same thing by specifying this number in the
2682     * LayoutParams.
2683     *
2684     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2685     * height setting.
2686     *
2687     * @attr ref android.R.styleable#TextView_height
2688     */
2689    @android.view.RemotableViewMethod
2690    public void setHeight(int pixels) {
2691        mMaximum = mMinimum = pixels;
2692        mMaxMode = mMinMode = PIXELS;
2693
2694        requestLayout();
2695        invalidate();
2696    }
2697
2698    /**
2699     * Makes the TextView at least this many ems wide
2700     *
2701     * @attr ref android.R.styleable#TextView_minEms
2702     */
2703    @android.view.RemotableViewMethod
2704    public void setMinEms(int minems) {
2705        mMinWidth = minems;
2706        mMinWidthMode = EMS;
2707
2708        requestLayout();
2709        invalidate();
2710    }
2711
2712    /**
2713     * Makes the TextView at least this many pixels wide
2714     *
2715     * @attr ref android.R.styleable#TextView_minWidth
2716     */
2717    @android.view.RemotableViewMethod
2718    public void setMinWidth(int minpixels) {
2719        mMinWidth = minpixels;
2720        mMinWidthMode = PIXELS;
2721
2722        requestLayout();
2723        invalidate();
2724    }
2725
2726    /**
2727     * Makes the TextView at most this many ems wide
2728     *
2729     * @attr ref android.R.styleable#TextView_maxEms
2730     */
2731    @android.view.RemotableViewMethod
2732    public void setMaxEms(int maxems) {
2733        mMaxWidth = maxems;
2734        mMaxWidthMode = EMS;
2735
2736        requestLayout();
2737        invalidate();
2738    }
2739
2740    /**
2741     * Makes the TextView at most this many pixels wide
2742     *
2743     * @attr ref android.R.styleable#TextView_maxWidth
2744     */
2745    @android.view.RemotableViewMethod
2746    public void setMaxWidth(int maxpixels) {
2747        mMaxWidth = maxpixels;
2748        mMaxWidthMode = PIXELS;
2749
2750        requestLayout();
2751        invalidate();
2752    }
2753
2754    /**
2755     * Makes the TextView exactly this many ems wide
2756     *
2757     * @attr ref android.R.styleable#TextView_ems
2758     */
2759    @android.view.RemotableViewMethod
2760    public void setEms(int ems) {
2761        mMaxWidth = mMinWidth = ems;
2762        mMaxWidthMode = mMinWidthMode = EMS;
2763
2764        requestLayout();
2765        invalidate();
2766    }
2767
2768    /**
2769     * Makes the TextView exactly this many pixels wide.
2770     * You could do the same thing by specifying this number in the
2771     * LayoutParams.
2772     *
2773     * @attr ref android.R.styleable#TextView_width
2774     */
2775    @android.view.RemotableViewMethod
2776    public void setWidth(int pixels) {
2777        mMaxWidth = mMinWidth = pixels;
2778        mMaxWidthMode = mMinWidthMode = PIXELS;
2779
2780        requestLayout();
2781        invalidate();
2782    }
2783
2784
2785    /**
2786     * Sets line spacing for this TextView.  Each line will have its height
2787     * multiplied by <code>mult</code> and have <code>add</code> added to it.
2788     *
2789     * @attr ref android.R.styleable#TextView_lineSpacingExtra
2790     * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
2791     */
2792    public void setLineSpacing(float add, float mult) {
2793        if (mSpacingAdd != add || mSpacingMult != mult) {
2794            mSpacingAdd = add;
2795            mSpacingMult = mult;
2796
2797            if (mLayout != null) {
2798                nullLayouts();
2799                requestLayout();
2800                invalidate();
2801            }
2802        }
2803    }
2804
2805    /**
2806     * Convenience method: Append the specified text to the TextView's
2807     * display buffer, upgrading it to BufferType.EDITABLE if it was
2808     * not already editable.
2809     */
2810    public final void append(CharSequence text) {
2811        append(text, 0, text.length());
2812    }
2813
2814    /**
2815     * Convenience method: Append the specified text slice to the TextView's
2816     * display buffer, upgrading it to BufferType.EDITABLE if it was
2817     * not already editable.
2818     */
2819    public void append(CharSequence text, int start, int end) {
2820        if (!(mText instanceof Editable)) {
2821            setText(mText, BufferType.EDITABLE);
2822        }
2823
2824        ((Editable) mText).append(text, start, end);
2825    }
2826
2827    private void updateTextColors() {
2828        boolean inval = false;
2829        int color = mTextColor.getColorForState(getDrawableState(), 0);
2830        if (color != mCurTextColor) {
2831            mCurTextColor = color;
2832            inval = true;
2833        }
2834        if (mLinkTextColor != null) {
2835            color = mLinkTextColor.getColorForState(getDrawableState(), 0);
2836            if (color != mTextPaint.linkColor) {
2837                mTextPaint.linkColor = color;
2838                inval = true;
2839            }
2840        }
2841        if (mHintTextColor != null) {
2842            color = mHintTextColor.getColorForState(getDrawableState(), 0);
2843            if (color != mCurHintTextColor && mText.length() == 0) {
2844                mCurHintTextColor = color;
2845                inval = true;
2846            }
2847        }
2848        if (inval) {
2849            invalidate();
2850        }
2851    }
2852
2853    @Override
2854    protected void drawableStateChanged() {
2855        super.drawableStateChanged();
2856        if (mTextColor != null && mTextColor.isStateful()
2857                || (mHintTextColor != null && mHintTextColor.isStateful())
2858                || (mLinkTextColor != null && mLinkTextColor.isStateful())) {
2859            updateTextColors();
2860        }
2861
2862        final Drawables dr = mDrawables;
2863        if (dr != null) {
2864            int[] state = getDrawableState();
2865            if (dr.mDrawableTop != null && dr.mDrawableTop.isStateful()) {
2866                dr.mDrawableTop.setState(state);
2867            }
2868            if (dr.mDrawableBottom != null && dr.mDrawableBottom.isStateful()) {
2869                dr.mDrawableBottom.setState(state);
2870            }
2871            if (dr.mDrawableLeft != null && dr.mDrawableLeft.isStateful()) {
2872                dr.mDrawableLeft.setState(state);
2873            }
2874            if (dr.mDrawableRight != null && dr.mDrawableRight.isStateful()) {
2875                dr.mDrawableRight.setState(state);
2876            }
2877            if (dr.mDrawableStart != null && dr.mDrawableStart.isStateful()) {
2878                dr.mDrawableStart.setState(state);
2879            }
2880            if (dr.mDrawableEnd != null && dr.mDrawableEnd.isStateful()) {
2881                dr.mDrawableEnd.setState(state);
2882            }
2883        }
2884    }
2885
2886    /**
2887     * User interface state that is stored by TextView for implementing
2888     * {@link View#onSaveInstanceState}.
2889     */
2890    public static class SavedState extends BaseSavedState {
2891        int selStart;
2892        int selEnd;
2893        CharSequence text;
2894        boolean frozenWithFocus;
2895        CharSequence error;
2896
2897        SavedState(Parcelable superState) {
2898            super(superState);
2899        }
2900
2901        @Override
2902        public void writeToParcel(Parcel out, int flags) {
2903            super.writeToParcel(out, flags);
2904            out.writeInt(selStart);
2905            out.writeInt(selEnd);
2906            out.writeInt(frozenWithFocus ? 1 : 0);
2907            TextUtils.writeToParcel(text, out, flags);
2908
2909            if (error == null) {
2910                out.writeInt(0);
2911            } else {
2912                out.writeInt(1);
2913                TextUtils.writeToParcel(error, out, flags);
2914            }
2915        }
2916
2917        @Override
2918        public String toString() {
2919            String str = "TextView.SavedState{"
2920                    + Integer.toHexString(System.identityHashCode(this))
2921                    + " start=" + selStart + " end=" + selEnd;
2922            if (text != null) {
2923                str += " text=" + text;
2924            }
2925            return str + "}";
2926        }
2927
2928        @SuppressWarnings("hiding")
2929        public static final Parcelable.Creator<SavedState> CREATOR
2930                = new Parcelable.Creator<SavedState>() {
2931            public SavedState createFromParcel(Parcel in) {
2932                return new SavedState(in);
2933            }
2934
2935            public SavedState[] newArray(int size) {
2936                return new SavedState[size];
2937            }
2938        };
2939
2940        private SavedState(Parcel in) {
2941            super(in);
2942            selStart = in.readInt();
2943            selEnd = in.readInt();
2944            frozenWithFocus = (in.readInt() != 0);
2945            text = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2946
2947            if (in.readInt() != 0) {
2948                error = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2949            }
2950        }
2951    }
2952
2953    @Override
2954    public Parcelable onSaveInstanceState() {
2955        Parcelable superState = super.onSaveInstanceState();
2956
2957        // Save state if we are forced to
2958        boolean save = mFreezesText;
2959        int start = 0;
2960        int end = 0;
2961
2962        if (mText != null) {
2963            start = getSelectionStart();
2964            end = getSelectionEnd();
2965            if (start >= 0 || end >= 0) {
2966                // Or save state if there is a selection
2967                save = true;
2968            }
2969        }
2970
2971        if (save) {
2972            SavedState ss = new SavedState(superState);
2973            // XXX Should also save the current scroll position!
2974            ss.selStart = start;
2975            ss.selEnd = end;
2976
2977            if (mText instanceof Spanned) {
2978                /*
2979                 * Calling setText() strips off any ChangeWatchers;
2980                 * strip them now to avoid leaking references.
2981                 * But do it to a copy so that if there are any
2982                 * further changes to the text of this view, it
2983                 * won't get into an inconsistent state.
2984                 */
2985
2986                Spannable sp = new SpannableString(mText);
2987
2988                for (ChangeWatcher cw : sp.getSpans(0, sp.length(), ChangeWatcher.class)) {
2989                    sp.removeSpan(cw);
2990                }
2991
2992                removeMisspelledSpans(sp);
2993                sp.removeSpan(mSuggestionRangeSpan);
2994
2995                ss.text = sp;
2996            } else {
2997                ss.text = mText.toString();
2998            }
2999
3000            if (isFocused() && start >= 0 && end >= 0) {
3001                ss.frozenWithFocus = true;
3002            }
3003
3004            ss.error = mError;
3005
3006            return ss;
3007        }
3008
3009        return superState;
3010    }
3011
3012    void removeMisspelledSpans(Spannable spannable) {
3013        SuggestionSpan[] suggestionSpans = spannable.getSpans(0, spannable.length(),
3014                SuggestionSpan.class);
3015        for (int i = 0; i < suggestionSpans.length; i++) {
3016            int flags = suggestionSpans[i].getFlags();
3017            if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0
3018                    && (flags & SuggestionSpan.FLAG_MISSPELLED) != 0) {
3019                spannable.removeSpan(suggestionSpans[i]);
3020            }
3021        }
3022    }
3023
3024    @Override
3025    public void onRestoreInstanceState(Parcelable state) {
3026        if (!(state instanceof SavedState)) {
3027            super.onRestoreInstanceState(state);
3028            return;
3029        }
3030
3031        SavedState ss = (SavedState)state;
3032        super.onRestoreInstanceState(ss.getSuperState());
3033
3034        // XXX restore buffer type too, as well as lots of other stuff
3035        if (ss.text != null) {
3036            setText(ss.text);
3037        }
3038
3039        if (ss.selStart >= 0 && ss.selEnd >= 0) {
3040            if (mText instanceof Spannable) {
3041                int len = mText.length();
3042
3043                if (ss.selStart > len || ss.selEnd > len) {
3044                    String restored = "";
3045
3046                    if (ss.text != null) {
3047                        restored = "(restored) ";
3048                    }
3049
3050                    Log.e(LOG_TAG, "Saved cursor position " + ss.selStart +
3051                          "/" + ss.selEnd + " out of range for " + restored +
3052                          "text " + mText);
3053                } else {
3054                    Selection.setSelection((Spannable) mText, ss.selStart,
3055                                           ss.selEnd);
3056
3057                    if (ss.frozenWithFocus) {
3058                        mFrozenWithFocus = true;
3059                    }
3060                }
3061            }
3062        }
3063
3064        if (ss.error != null) {
3065            final CharSequence error = ss.error;
3066            // Display the error later, after the first layout pass
3067            post(new Runnable() {
3068                public void run() {
3069                    setError(error);
3070                }
3071            });
3072        }
3073    }
3074
3075    /**
3076     * Control whether this text view saves its entire text contents when
3077     * freezing to an icicle, in addition to dynamic state such as cursor
3078     * position.  By default this is false, not saving the text.  Set to true
3079     * if the text in the text view is not being saved somewhere else in
3080     * persistent storage (such as in a content provider) so that if the
3081     * view is later thawed the user will not lose their data.
3082     *
3083     * @param freezesText Controls whether a frozen icicle should include the
3084     * entire text data: true to include it, false to not.
3085     *
3086     * @attr ref android.R.styleable#TextView_freezesText
3087     */
3088    @android.view.RemotableViewMethod
3089    public void setFreezesText(boolean freezesText) {
3090        mFreezesText = freezesText;
3091    }
3092
3093    /**
3094     * Return whether this text view is including its entire text contents
3095     * in frozen icicles.
3096     *
3097     * @return Returns true if text is included, false if it isn't.
3098     *
3099     * @see #setFreezesText
3100     */
3101    public boolean getFreezesText() {
3102        return mFreezesText;
3103    }
3104
3105    ///////////////////////////////////////////////////////////////////////////
3106
3107    /**
3108     * Sets the Factory used to create new Editables.
3109     */
3110    public final void setEditableFactory(Editable.Factory factory) {
3111        mEditableFactory = factory;
3112        setText(mText);
3113    }
3114
3115    /**
3116     * Sets the Factory used to create new Spannables.
3117     */
3118    public final void setSpannableFactory(Spannable.Factory factory) {
3119        mSpannableFactory = factory;
3120        setText(mText);
3121    }
3122
3123    /**
3124     * Sets the string value of the TextView. TextView <em>does not</em> accept
3125     * HTML-like formatting, which you can do with text strings in XML resource files.
3126     * To style your strings, attach android.text.style.* objects to a
3127     * {@link android.text.SpannableString SpannableString}, or see the
3128     * <a href="{@docRoot}guide/topics/resources/available-resources.html#stringresources">
3129     * Available Resource Types</a> documentation for an example of setting
3130     * formatted text in the XML resource file.
3131     *
3132     * @attr ref android.R.styleable#TextView_text
3133     */
3134    @android.view.RemotableViewMethod
3135    public final void setText(CharSequence text) {
3136        setText(text, mBufferType);
3137    }
3138
3139    /**
3140     * Like {@link #setText(CharSequence)},
3141     * except that the cursor position (if any) is retained in the new text.
3142     *
3143     * @param text The new text to place in the text view.
3144     *
3145     * @see #setText(CharSequence)
3146     */
3147    @android.view.RemotableViewMethod
3148    public final void setTextKeepState(CharSequence text) {
3149        setTextKeepState(text, mBufferType);
3150    }
3151
3152    /**
3153     * Sets the text that this TextView is to display (see
3154     * {@link #setText(CharSequence)}) and also sets whether it is stored
3155     * in a styleable/spannable buffer and whether it is editable.
3156     *
3157     * @attr ref android.R.styleable#TextView_text
3158     * @attr ref android.R.styleable#TextView_bufferType
3159     */
3160    public void setText(CharSequence text, BufferType type) {
3161        setText(text, type, true, 0);
3162
3163        if (mCharWrapper != null) {
3164            mCharWrapper.mChars = null;
3165        }
3166    }
3167
3168    private void setText(CharSequence text, BufferType type,
3169                         boolean notifyBefore, int oldlen) {
3170        if (text == null) {
3171            text = "";
3172        }
3173
3174        // If suggestions are not enabled, remove the suggestion spans from the text
3175        if (!isSuggestionsEnabled()) {
3176            text = removeSuggestionSpans(text);
3177        }
3178
3179        if (!mUserSetTextScaleX) mTextPaint.setTextScaleX(1.0f);
3180
3181        if (text instanceof Spanned &&
3182            ((Spanned) text).getSpanStart(TextUtils.TruncateAt.MARQUEE) >= 0) {
3183            if (ViewConfiguration.get(mContext).isFadingMarqueeEnabled()) {
3184                setHorizontalFadingEdgeEnabled(true);
3185                mMarqueeFadeMode = MARQUEE_FADE_NORMAL;
3186            } else {
3187                setHorizontalFadingEdgeEnabled(false);
3188                mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
3189            }
3190            setEllipsize(TextUtils.TruncateAt.MARQUEE);
3191        }
3192
3193        int n = mFilters.length;
3194        for (int i = 0; i < n; i++) {
3195            CharSequence out = mFilters[i].filter(text, 0, text.length(),
3196                                                  EMPTY_SPANNED, 0, 0);
3197            if (out != null) {
3198                text = out;
3199            }
3200        }
3201
3202        if (notifyBefore) {
3203            if (mText != null) {
3204                oldlen = mText.length();
3205                sendBeforeTextChanged(mText, 0, oldlen, text.length());
3206            } else {
3207                sendBeforeTextChanged("", 0, 0, text.length());
3208            }
3209        }
3210
3211        boolean needEditableForNotification = false;
3212        boolean startSpellCheck = false;
3213
3214        if (mListeners != null && mListeners.size() != 0) {
3215            needEditableForNotification = true;
3216        }
3217
3218        if (type == BufferType.EDITABLE || mInput != null || needEditableForNotification) {
3219            Editable t = mEditableFactory.newEditable(text);
3220            text = t;
3221            setFilters(t, mFilters);
3222            InputMethodManager imm = InputMethodManager.peekInstance();
3223            if (imm != null) imm.restartInput(this);
3224            startSpellCheck = true;
3225        } else if (type == BufferType.SPANNABLE || mMovement != null) {
3226            text = mSpannableFactory.newSpannable(text);
3227        } else if (!(text instanceof CharWrapper)) {
3228            text = TextUtils.stringOrSpannedString(text);
3229        }
3230
3231        if (mAutoLinkMask != 0) {
3232            Spannable s2;
3233
3234            if (type == BufferType.EDITABLE || text instanceof Spannable) {
3235                s2 = (Spannable) text;
3236            } else {
3237                s2 = mSpannableFactory.newSpannable(text);
3238            }
3239
3240            if (Linkify.addLinks(s2, mAutoLinkMask)) {
3241                text = s2;
3242                type = (type == BufferType.EDITABLE) ? BufferType.EDITABLE : BufferType.SPANNABLE;
3243
3244                /*
3245                 * We must go ahead and set the text before changing the
3246                 * movement method, because setMovementMethod() may call
3247                 * setText() again to try to upgrade the buffer type.
3248                 */
3249                mText = text;
3250
3251                // Do not change the movement method for text that support text selection as it
3252                // would prevent an arbitrary cursor displacement.
3253                if (mLinksClickable && !textCanBeSelected()) {
3254                    setMovementMethod(LinkMovementMethod.getInstance());
3255                }
3256            }
3257        }
3258
3259        mBufferType = type;
3260        mText = text;
3261
3262        if (mTransformation == null) {
3263            mTransformed = text;
3264        } else {
3265            mTransformed = mTransformation.getTransformation(text, this);
3266        }
3267
3268        final int textLength = text.length();
3269
3270        if (text instanceof Spannable && !mAllowTransformationLengthChange) {
3271            Spannable sp = (Spannable) text;
3272
3273            // Remove any ChangeWatchers that might have come
3274            // from other TextViews.
3275            final ChangeWatcher[] watchers = sp.getSpans(0, sp.length(), ChangeWatcher.class);
3276            final int count = watchers.length;
3277            for (int i = 0; i < count; i++)
3278                sp.removeSpan(watchers[i]);
3279
3280            if (mChangeWatcher == null)
3281                mChangeWatcher = new ChangeWatcher();
3282
3283            sp.setSpan(mChangeWatcher, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE |
3284                       (PRIORITY << Spanned.SPAN_PRIORITY_SHIFT));
3285
3286            if (mInput != null) {
3287                sp.setSpan(mInput, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
3288            }
3289
3290            if (mTransformation != null) {
3291                sp.setSpan(mTransformation, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
3292            }
3293
3294            if (mMovement != null) {
3295                mMovement.initialize(this, (Spannable) text);
3296
3297                /*
3298                 * Initializing the movement method will have set the
3299                 * selection, so reset mSelectionMoved to keep that from
3300                 * interfering with the normal on-focus selection-setting.
3301                 */
3302                mSelectionMoved = false;
3303            }
3304        }
3305
3306        if (mLayout != null) {
3307            checkForRelayout();
3308        }
3309
3310        sendOnTextChanged(text, 0, oldlen, textLength);
3311        onTextChanged(text, 0, oldlen, textLength);
3312
3313        if (startSpellCheck && mSpellChecker != null) {
3314            // This view has to have been previously attached for mSpellChecker to exist
3315            updateSpellCheckSpans(0, textLength);
3316        }
3317
3318        if (needEditableForNotification) {
3319            sendAfterTextChanged((Editable) text);
3320        }
3321
3322        // SelectionModifierCursorController depends on textCanBeSelected, which depends on text
3323        prepareCursorControllers();
3324    }
3325
3326    /**
3327     * Sets the TextView to display the specified slice of the specified
3328     * char array.  You must promise that you will not change the contents
3329     * of the array except for right before another call to setText(),
3330     * since the TextView has no way to know that the text
3331     * has changed and that it needs to invalidate and re-layout.
3332     */
3333    public final void setText(char[] text, int start, int len) {
3334        int oldlen = 0;
3335
3336        if (start < 0 || len < 0 || start + len > text.length) {
3337            throw new IndexOutOfBoundsException(start + ", " + len);
3338        }
3339
3340        /*
3341         * We must do the before-notification here ourselves because if
3342         * the old text is a CharWrapper we destroy it before calling
3343         * into the normal path.
3344         */
3345        if (mText != null) {
3346            oldlen = mText.length();
3347            sendBeforeTextChanged(mText, 0, oldlen, len);
3348        } else {
3349            sendBeforeTextChanged("", 0, 0, len);
3350        }
3351
3352        if (mCharWrapper == null) {
3353            mCharWrapper = new CharWrapper(text, start, len);
3354        } else {
3355            mCharWrapper.set(text, start, len);
3356        }
3357
3358        setText(mCharWrapper, mBufferType, false, oldlen);
3359    }
3360
3361    private static class CharWrapper implements CharSequence, GetChars, GraphicsOperations {
3362        private char[] mChars;
3363        private int mStart, mLength;
3364
3365        public CharWrapper(char[] chars, int start, int len) {
3366            mChars = chars;
3367            mStart = start;
3368            mLength = len;
3369        }
3370
3371        /* package */ void set(char[] chars, int start, int len) {
3372            mChars = chars;
3373            mStart = start;
3374            mLength = len;
3375        }
3376
3377        public int length() {
3378            return mLength;
3379        }
3380
3381        public char charAt(int off) {
3382            return mChars[off + mStart];
3383        }
3384
3385        @Override
3386        public String toString() {
3387            return new String(mChars, mStart, mLength);
3388        }
3389
3390        public CharSequence subSequence(int start, int end) {
3391            if (start < 0 || end < 0 || start > mLength || end > mLength) {
3392                throw new IndexOutOfBoundsException(start + ", " + end);
3393            }
3394
3395            return new String(mChars, start + mStart, end - start);
3396        }
3397
3398        public void getChars(int start, int end, char[] buf, int off) {
3399            if (start < 0 || end < 0 || start > mLength || end > mLength) {
3400                throw new IndexOutOfBoundsException(start + ", " + end);
3401            }
3402
3403            System.arraycopy(mChars, start + mStart, buf, off, end - start);
3404        }
3405
3406        public void drawText(Canvas c, int start, int end,
3407                             float x, float y, Paint p) {
3408            c.drawText(mChars, start + mStart, end - start, x, y, p);
3409        }
3410
3411        public void drawTextRun(Canvas c, int start, int end,
3412                int contextStart, int contextEnd, float x, float y, int flags, Paint p) {
3413            int count = end - start;
3414            int contextCount = contextEnd - contextStart;
3415            c.drawTextRun(mChars, start + mStart, count, contextStart + mStart,
3416                    contextCount, x, y, flags, p);
3417        }
3418
3419        public float measureText(int start, int end, Paint p) {
3420            return p.measureText(mChars, start + mStart, end - start);
3421        }
3422
3423        public int getTextWidths(int start, int end, float[] widths, Paint p) {
3424            return p.getTextWidths(mChars, start + mStart, end - start, widths);
3425        }
3426
3427        public float getTextRunAdvances(int start, int end, int contextStart,
3428                int contextEnd, int flags, float[] advances, int advancesIndex,
3429                Paint p) {
3430            int count = end - start;
3431            int contextCount = contextEnd - contextStart;
3432            return p.getTextRunAdvances(mChars, start + mStart, count,
3433                    contextStart + mStart, contextCount, flags, advances,
3434                    advancesIndex);
3435        }
3436
3437        public float getTextRunAdvances(int start, int end, int contextStart,
3438                int contextEnd, int flags, float[] advances, int advancesIndex,
3439                Paint p, int reserved) {
3440            int count = end - start;
3441            int contextCount = contextEnd - contextStart;
3442            return p.getTextRunAdvances(mChars, start + mStart, count,
3443                    contextStart + mStart, contextCount, flags, advances,
3444                    advancesIndex, reserved);
3445        }
3446
3447        public int getTextRunCursor(int contextStart, int contextEnd, int flags,
3448                int offset, int cursorOpt, Paint p) {
3449            int contextCount = contextEnd - contextStart;
3450            return p.getTextRunCursor(mChars, contextStart + mStart,
3451                    contextCount, flags, offset + mStart, cursorOpt);
3452        }
3453    }
3454
3455    /**
3456     * Like {@link #setText(CharSequence, android.widget.TextView.BufferType)},
3457     * except that the cursor position (if any) is retained in the new text.
3458     *
3459     * @see #setText(CharSequence, android.widget.TextView.BufferType)
3460     */
3461    public final void setTextKeepState(CharSequence text, BufferType type) {
3462        int start = getSelectionStart();
3463        int end = getSelectionEnd();
3464        int len = text.length();
3465
3466        setText(text, type);
3467
3468        if (start >= 0 || end >= 0) {
3469            if (mText instanceof Spannable) {
3470                Selection.setSelection((Spannable) mText,
3471                                       Math.max(0, Math.min(start, len)),
3472                                       Math.max(0, Math.min(end, len)));
3473            }
3474        }
3475    }
3476
3477    @android.view.RemotableViewMethod
3478    public final void setText(int resid) {
3479        setText(getContext().getResources().getText(resid));
3480    }
3481
3482    public final void setText(int resid, BufferType type) {
3483        setText(getContext().getResources().getText(resid), type);
3484    }
3485
3486    /**
3487     * Sets the text to be displayed when the text of the TextView is empty.
3488     * Null means to use the normal empty text. The hint does not currently
3489     * participate in determining the size of the view.
3490     *
3491     * @attr ref android.R.styleable#TextView_hint
3492     */
3493    @android.view.RemotableViewMethod
3494    public final void setHint(CharSequence hint) {
3495        mHint = TextUtils.stringOrSpannedString(hint);
3496
3497        if (mLayout != null) {
3498            checkForRelayout();
3499        }
3500
3501        if (mText.length() == 0) {
3502            invalidate();
3503        }
3504    }
3505
3506    /**
3507     * Sets the text to be displayed when the text of the TextView is empty,
3508     * from a resource.
3509     *
3510     * @attr ref android.R.styleable#TextView_hint
3511     */
3512    @android.view.RemotableViewMethod
3513    public final void setHint(int resid) {
3514        setHint(getContext().getResources().getText(resid));
3515    }
3516
3517    /**
3518     * Returns the hint that is displayed when the text of the TextView
3519     * is empty.
3520     *
3521     * @attr ref android.R.styleable#TextView_hint
3522     */
3523    @ViewDebug.CapturedViewProperty
3524    public CharSequence getHint() {
3525        return mHint;
3526    }
3527
3528    private static boolean isMultilineInputType(int type) {
3529        return (type & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE)) ==
3530            (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE);
3531    }
3532
3533    /**
3534     * Set the type of the content with a constant as defined for {@link EditorInfo#inputType}. This
3535     * will take care of changing the key listener, by calling {@link #setKeyListener(KeyListener)},
3536     * to match the given content type.  If the given content type is {@link EditorInfo#TYPE_NULL}
3537     * then a soft keyboard will not be displayed for this text view.
3538     *
3539     * Note that the maximum number of displayed lines (see {@link #setMaxLines(int)}) will be
3540     * modified if you change the {@link EditorInfo#TYPE_TEXT_FLAG_MULTI_LINE} flag of the input
3541     * type.
3542     *
3543     * @see #getInputType()
3544     * @see #setRawInputType(int)
3545     * @see android.text.InputType
3546     * @attr ref android.R.styleable#TextView_inputType
3547     */
3548    public void setInputType(int type) {
3549        final boolean wasPassword = isPasswordInputType(mInputType);
3550        final boolean wasVisiblePassword = isVisiblePasswordInputType(mInputType);
3551        setInputType(type, false);
3552        final boolean isPassword = isPasswordInputType(type);
3553        final boolean isVisiblePassword = isVisiblePasswordInputType(type);
3554        boolean forceUpdate = false;
3555        if (isPassword) {
3556            setTransformationMethod(PasswordTransformationMethod.getInstance());
3557            setTypefaceByIndex(MONOSPACE, 0);
3558        } else if (isVisiblePassword) {
3559            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3560                forceUpdate = true;
3561            }
3562            setTypefaceByIndex(MONOSPACE, 0);
3563        } else if (wasPassword || wasVisiblePassword) {
3564            // not in password mode, clean up typeface and transformation
3565            setTypefaceByIndex(-1, -1);
3566            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3567                forceUpdate = true;
3568            }
3569        }
3570
3571        boolean singleLine = !isMultilineInputType(type);
3572
3573        // We need to update the single line mode if it has changed or we
3574        // were previously in password mode.
3575        if (mSingleLine != singleLine || forceUpdate) {
3576            // Change single line mode, but only change the transformation if
3577            // we are not in password mode.
3578            applySingleLine(singleLine, !isPassword, true);
3579        }
3580
3581        if (!isSuggestionsEnabled()) {
3582            mText = removeSuggestionSpans(mText);
3583        }
3584
3585        InputMethodManager imm = InputMethodManager.peekInstance();
3586        if (imm != null) imm.restartInput(this);
3587    }
3588
3589    /**
3590     * It would be better to rely on the input type for everything. A password inputType should have
3591     * a password transformation. We should hence use isPasswordInputType instead of this method.
3592     *
3593     * We should:
3594     * - Call setInputType in setKeyListener instead of changing the input type directly (which
3595     * would install the correct transformation).
3596     * - Refuse the installation of a non-password transformation in setTransformation if the input
3597     * type is password.
3598     *
3599     * However, this is like this for legacy reasons and we cannot break existing apps. This method
3600     * is useful since it matches what the user can see (obfuscated text or not).
3601     *
3602     * @return true if the current transformation method is of the password type.
3603     */
3604    private boolean hasPasswordTransformationMethod() {
3605        return mTransformation instanceof PasswordTransformationMethod;
3606    }
3607
3608    private static boolean isPasswordInputType(int inputType) {
3609        final int variation =
3610                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3611        return variation
3612                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)
3613                || variation
3614                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD)
3615                || variation
3616                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
3617    }
3618
3619    private static boolean isVisiblePasswordInputType(int inputType) {
3620        final int variation =
3621                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3622        return variation
3623                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
3624    }
3625
3626    /**
3627     * Directly change the content type integer of the text view, without
3628     * modifying any other state.
3629     * @see #setInputType(int)
3630     * @see android.text.InputType
3631     * @attr ref android.R.styleable#TextView_inputType
3632     */
3633    public void setRawInputType(int type) {
3634        mInputType = type;
3635    }
3636
3637    private void setInputType(int type, boolean direct) {
3638        final int cls = type & EditorInfo.TYPE_MASK_CLASS;
3639        KeyListener input;
3640        if (cls == EditorInfo.TYPE_CLASS_TEXT) {
3641            boolean autotext = (type & EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT) != 0;
3642            TextKeyListener.Capitalize cap;
3643            if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS) != 0) {
3644                cap = TextKeyListener.Capitalize.CHARACTERS;
3645            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS) != 0) {
3646                cap = TextKeyListener.Capitalize.WORDS;
3647            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES) != 0) {
3648                cap = TextKeyListener.Capitalize.SENTENCES;
3649            } else {
3650                cap = TextKeyListener.Capitalize.NONE;
3651            }
3652            input = TextKeyListener.getInstance(autotext, cap);
3653        } else if (cls == EditorInfo.TYPE_CLASS_NUMBER) {
3654            input = DigitsKeyListener.getInstance(
3655                    (type & EditorInfo.TYPE_NUMBER_FLAG_SIGNED) != 0,
3656                    (type & EditorInfo.TYPE_NUMBER_FLAG_DECIMAL) != 0);
3657        } else if (cls == EditorInfo.TYPE_CLASS_DATETIME) {
3658            switch (type & EditorInfo.TYPE_MASK_VARIATION) {
3659                case EditorInfo.TYPE_DATETIME_VARIATION_DATE:
3660                    input = DateKeyListener.getInstance();
3661                    break;
3662                case EditorInfo.TYPE_DATETIME_VARIATION_TIME:
3663                    input = TimeKeyListener.getInstance();
3664                    break;
3665                default:
3666                    input = DateTimeKeyListener.getInstance();
3667                    break;
3668            }
3669        } else if (cls == EditorInfo.TYPE_CLASS_PHONE) {
3670            input = DialerKeyListener.getInstance();
3671        } else {
3672            input = TextKeyListener.getInstance();
3673        }
3674        setRawInputType(type);
3675        if (direct) mInput = input;
3676        else {
3677            setKeyListenerOnly(input);
3678        }
3679    }
3680
3681    /**
3682     * Get the type of the content.
3683     *
3684     * @see #setInputType(int)
3685     * @see android.text.InputType
3686     */
3687    public int getInputType() {
3688        return mInputType;
3689    }
3690
3691    /**
3692     * Change the editor type integer associated with the text view, which
3693     * will be reported to an IME with {@link EditorInfo#imeOptions} when it
3694     * has focus.
3695     * @see #getImeOptions
3696     * @see android.view.inputmethod.EditorInfo
3697     * @attr ref android.R.styleable#TextView_imeOptions
3698     */
3699    public void setImeOptions(int imeOptions) {
3700        if (mInputContentType == null) {
3701            mInputContentType = new InputContentType();
3702        }
3703        mInputContentType.imeOptions = imeOptions;
3704    }
3705
3706    /**
3707     * Get the type of the IME editor.
3708     *
3709     * @see #setImeOptions(int)
3710     * @see android.view.inputmethod.EditorInfo
3711     */
3712    public int getImeOptions() {
3713        return mInputContentType != null
3714                ? mInputContentType.imeOptions : EditorInfo.IME_NULL;
3715    }
3716
3717    /**
3718     * Change the custom IME action associated with the text view, which
3719     * will be reported to an IME with {@link EditorInfo#actionLabel}
3720     * and {@link EditorInfo#actionId} when it has focus.
3721     * @see #getImeActionLabel
3722     * @see #getImeActionId
3723     * @see android.view.inputmethod.EditorInfo
3724     * @attr ref android.R.styleable#TextView_imeActionLabel
3725     * @attr ref android.R.styleable#TextView_imeActionId
3726     */
3727    public void setImeActionLabel(CharSequence label, int actionId) {
3728        if (mInputContentType == null) {
3729            mInputContentType = new InputContentType();
3730        }
3731        mInputContentType.imeActionLabel = label;
3732        mInputContentType.imeActionId = actionId;
3733    }
3734
3735    /**
3736     * Get the IME action label previous set with {@link #setImeActionLabel}.
3737     *
3738     * @see #setImeActionLabel
3739     * @see android.view.inputmethod.EditorInfo
3740     */
3741    public CharSequence getImeActionLabel() {
3742        return mInputContentType != null
3743                ? mInputContentType.imeActionLabel : null;
3744    }
3745
3746    /**
3747     * Get the IME action ID previous set with {@link #setImeActionLabel}.
3748     *
3749     * @see #setImeActionLabel
3750     * @see android.view.inputmethod.EditorInfo
3751     */
3752    public int getImeActionId() {
3753        return mInputContentType != null
3754                ? mInputContentType.imeActionId : 0;
3755    }
3756
3757    /**
3758     * Set a special listener to be called when an action is performed
3759     * on the text view.  This will be called when the enter key is pressed,
3760     * or when an action supplied to the IME is selected by the user.  Setting
3761     * this means that the normal hard key event will not insert a newline
3762     * into the text view, even if it is multi-line; holding down the ALT
3763     * modifier will, however, allow the user to insert a newline character.
3764     */
3765    public void setOnEditorActionListener(OnEditorActionListener l) {
3766        if (mInputContentType == null) {
3767            mInputContentType = new InputContentType();
3768        }
3769        mInputContentType.onEditorActionListener = l;
3770    }
3771
3772    /**
3773     * Called when an attached input method calls
3774     * {@link InputConnection#performEditorAction(int)
3775     * InputConnection.performEditorAction()}
3776     * for this text view.  The default implementation will call your action
3777     * listener supplied to {@link #setOnEditorActionListener}, or perform
3778     * a standard operation for {@link EditorInfo#IME_ACTION_NEXT
3779     * EditorInfo.IME_ACTION_NEXT}, {@link EditorInfo#IME_ACTION_PREVIOUS
3780     * EditorInfo.IME_ACTION_PREVIOUS}, or {@link EditorInfo#IME_ACTION_DONE
3781     * EditorInfo.IME_ACTION_DONE}.
3782     *
3783     * <p>For backwards compatibility, if no IME options have been set and the
3784     * text view would not normally advance focus on enter, then
3785     * the NEXT and DONE actions received here will be turned into an enter
3786     * key down/up pair to go through the normal key handling.
3787     *
3788     * @param actionCode The code of the action being performed.
3789     *
3790     * @see #setOnEditorActionListener
3791     */
3792    public void onEditorAction(int actionCode) {
3793        final InputContentType ict = mInputContentType;
3794        if (ict != null) {
3795            if (ict.onEditorActionListener != null) {
3796                if (ict.onEditorActionListener.onEditorAction(this,
3797                        actionCode, null)) {
3798                    return;
3799                }
3800            }
3801
3802            // This is the handling for some default action.
3803            // Note that for backwards compatibility we don't do this
3804            // default handling if explicit ime options have not been given,
3805            // instead turning this into the normal enter key codes that an
3806            // app may be expecting.
3807            if (actionCode == EditorInfo.IME_ACTION_NEXT) {
3808                View v = focusSearch(FOCUS_FORWARD);
3809                if (v != null) {
3810                    if (!v.requestFocus(FOCUS_FORWARD)) {
3811                        throw new IllegalStateException("focus search returned a view " +
3812                                "that wasn't able to take focus!");
3813                    }
3814                }
3815                return;
3816
3817            } else if (actionCode == EditorInfo.IME_ACTION_PREVIOUS) {
3818                View v = focusSearch(FOCUS_BACKWARD);
3819                if (v != null) {
3820                    if (!v.requestFocus(FOCUS_BACKWARD)) {
3821                        throw new IllegalStateException("focus search returned a view " +
3822                                "that wasn't able to take focus!");
3823                    }
3824                }
3825                return;
3826
3827            } else if (actionCode == EditorInfo.IME_ACTION_DONE) {
3828                InputMethodManager imm = InputMethodManager.peekInstance();
3829                if (imm != null && imm.isActive(this)) {
3830                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
3831                }
3832                clearFocus();
3833                return;
3834            }
3835        }
3836
3837        Handler h = getHandler();
3838        if (h != null) {
3839            long eventTime = SystemClock.uptimeMillis();
3840            h.sendMessage(h.obtainMessage(ViewRootImpl.DISPATCH_KEY_FROM_IME,
3841                    new KeyEvent(eventTime, eventTime,
3842                    KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_ENTER, 0, 0,
3843                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3844                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3845                    | KeyEvent.FLAG_EDITOR_ACTION)));
3846            h.sendMessage(h.obtainMessage(ViewRootImpl.DISPATCH_KEY_FROM_IME,
3847                    new KeyEvent(SystemClock.uptimeMillis(), eventTime,
3848                    KeyEvent.ACTION_UP, KeyEvent.KEYCODE_ENTER, 0, 0,
3849                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3850                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3851                    | KeyEvent.FLAG_EDITOR_ACTION)));
3852        }
3853    }
3854
3855    /**
3856     * Set the private content type of the text, which is the
3857     * {@link EditorInfo#privateImeOptions EditorInfo.privateImeOptions}
3858     * field that will be filled in when creating an input connection.
3859     *
3860     * @see #getPrivateImeOptions()
3861     * @see EditorInfo#privateImeOptions
3862     * @attr ref android.R.styleable#TextView_privateImeOptions
3863     */
3864    public void setPrivateImeOptions(String type) {
3865        if (mInputContentType == null) mInputContentType = new InputContentType();
3866        mInputContentType.privateImeOptions = type;
3867    }
3868
3869    /**
3870     * Get the private type of the content.
3871     *
3872     * @see #setPrivateImeOptions(String)
3873     * @see EditorInfo#privateImeOptions
3874     */
3875    public String getPrivateImeOptions() {
3876        return mInputContentType != null
3877                ? mInputContentType.privateImeOptions : null;
3878    }
3879
3880    /**
3881     * Set the extra input data of the text, which is the
3882     * {@link EditorInfo#extras TextBoxAttribute.extras}
3883     * Bundle that will be filled in when creating an input connection.  The
3884     * given integer is the resource ID of an XML resource holding an
3885     * {@link android.R.styleable#InputExtras &lt;input-extras&gt;} XML tree.
3886     *
3887     * @see #getInputExtras(boolean)
3888     * @see EditorInfo#extras
3889     * @attr ref android.R.styleable#TextView_editorExtras
3890     */
3891    public void setInputExtras(int xmlResId)
3892            throws XmlPullParserException, IOException {
3893        XmlResourceParser parser = getResources().getXml(xmlResId);
3894        if (mInputContentType == null) mInputContentType = new InputContentType();
3895        mInputContentType.extras = new Bundle();
3896        getResources().parseBundleExtras(parser, mInputContentType.extras);
3897    }
3898
3899    /**
3900     * Retrieve the input extras currently associated with the text view, which
3901     * can be viewed as well as modified.
3902     *
3903     * @param create If true, the extras will be created if they don't already
3904     * exist.  Otherwise, null will be returned if none have been created.
3905     * @see #setInputExtras(int)
3906     * @see EditorInfo#extras
3907     * @attr ref android.R.styleable#TextView_editorExtras
3908     */
3909    public Bundle getInputExtras(boolean create) {
3910        if (mInputContentType == null) {
3911            if (!create) return null;
3912            mInputContentType = new InputContentType();
3913        }
3914        if (mInputContentType.extras == null) {
3915            if (!create) return null;
3916            mInputContentType.extras = new Bundle();
3917        }
3918        return mInputContentType.extras;
3919    }
3920
3921    /**
3922     * Returns the error message that was set to be displayed with
3923     * {@link #setError}, or <code>null</code> if no error was set
3924     * or if it the error was cleared by the widget after user input.
3925     */
3926    public CharSequence getError() {
3927        return mError;
3928    }
3929
3930    /**
3931     * Sets the right-hand compound drawable of the TextView to the "error"
3932     * icon and sets an error message that will be displayed in a popup when
3933     * the TextView has focus.  The icon and error message will be reset to
3934     * null when any key events cause changes to the TextView's text.  If the
3935     * <code>error</code> is <code>null</code>, the error message and icon
3936     * will be cleared.
3937     */
3938    @android.view.RemotableViewMethod
3939    public void setError(CharSequence error) {
3940        if (error == null) {
3941            setError(null, null);
3942        } else {
3943            Drawable dr = getContext().getResources().
3944                getDrawable(com.android.internal.R.drawable.indicator_input_error);
3945
3946            dr.setBounds(0, 0, dr.getIntrinsicWidth(), dr.getIntrinsicHeight());
3947            setError(error, dr);
3948        }
3949    }
3950
3951    /**
3952     * Sets the right-hand compound drawable of the TextView to the specified
3953     * icon and sets an error message that will be displayed in a popup when
3954     * the TextView has focus.  The icon and error message will be reset to
3955     * null when any key events cause changes to the TextView's text.  The
3956     * drawable must already have had {@link Drawable#setBounds} set on it.
3957     * If the <code>error</code> is <code>null</code>, the error message will
3958     * be cleared (and you should provide a <code>null</code> icon as well).
3959     */
3960    public void setError(CharSequence error, Drawable icon) {
3961        error = TextUtils.stringOrSpannedString(error);
3962
3963        mError = error;
3964        mErrorWasChanged = true;
3965        final Drawables dr = mDrawables;
3966        if (dr != null) {
3967            switch (getResolvedLayoutDirection()) {
3968                default:
3969                case LAYOUT_DIRECTION_LTR:
3970                    setCompoundDrawables(dr.mDrawableLeft, dr.mDrawableTop, icon,
3971                            dr.mDrawableBottom);
3972                    break;
3973                case LAYOUT_DIRECTION_RTL:
3974                    setCompoundDrawables(icon, dr.mDrawableTop, dr.mDrawableRight,
3975                            dr.mDrawableBottom);
3976                    break;
3977            }
3978        } else {
3979            setCompoundDrawables(null, null, icon, null);
3980        }
3981
3982        if (error == null) {
3983            if (mPopup != null) {
3984                if (mPopup.isShowing()) {
3985                    mPopup.dismiss();
3986                }
3987
3988                mPopup = null;
3989            }
3990        } else {
3991            if (isFocused()) {
3992                showError();
3993            }
3994        }
3995    }
3996
3997    private void showError() {
3998        if (getWindowToken() == null) {
3999            mShowErrorAfterAttach = true;
4000            return;
4001        }
4002
4003        if (mPopup == null) {
4004            LayoutInflater inflater = LayoutInflater.from(getContext());
4005            final TextView err = (TextView) inflater.inflate(
4006                    com.android.internal.R.layout.textview_hint, null);
4007
4008            final float scale = getResources().getDisplayMetrics().density;
4009            mPopup = new ErrorPopup(err, (int) (200 * scale + 0.5f), (int) (50 * scale + 0.5f));
4010            mPopup.setFocusable(false);
4011            // The user is entering text, so the input method is needed.  We
4012            // don't want the popup to be displayed on top of it.
4013            mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);
4014        }
4015
4016        TextView tv = (TextView) mPopup.getContentView();
4017        chooseSize(mPopup, mError, tv);
4018        tv.setText(mError);
4019
4020        mPopup.showAsDropDown(this, getErrorX(), getErrorY());
4021        mPopup.fixDirection(mPopup.isAboveAnchor());
4022    }
4023
4024    private static class ErrorPopup extends PopupWindow {
4025        private boolean mAbove = false;
4026        private final TextView mView;
4027        private int mPopupInlineErrorBackgroundId = 0;
4028        private int mPopupInlineErrorAboveBackgroundId = 0;
4029
4030        ErrorPopup(TextView v, int width, int height) {
4031            super(v, width, height);
4032            mView = v;
4033            // Make sure the TextView has a background set as it will be used the first time it is
4034            // shown and positionned. Initialized with below background, which should have
4035            // dimensions identical to the above version for this to work (and is more likely).
4036            mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
4037                    com.android.internal.R.styleable.Theme_errorMessageBackground);
4038            mView.setBackgroundResource(mPopupInlineErrorBackgroundId);
4039        }
4040
4041        void fixDirection(boolean above) {
4042            mAbove = above;
4043
4044            if (above) {
4045                mPopupInlineErrorAboveBackgroundId =
4046                    getResourceId(mPopupInlineErrorAboveBackgroundId,
4047                            com.android.internal.R.styleable.Theme_errorMessageAboveBackground);
4048            } else {
4049                mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
4050                        com.android.internal.R.styleable.Theme_errorMessageBackground);
4051            }
4052
4053            mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId :
4054                mPopupInlineErrorBackgroundId);
4055        }
4056
4057        private int getResourceId(int currentId, int index) {
4058            if (currentId == 0) {
4059                TypedArray styledAttributes = mView.getContext().obtainStyledAttributes(
4060                        R.styleable.Theme);
4061                currentId = styledAttributes.getResourceId(index, 0);
4062                styledAttributes.recycle();
4063            }
4064            return currentId;
4065        }
4066
4067        @Override
4068        public void update(int x, int y, int w, int h, boolean force) {
4069            super.update(x, y, w, h, force);
4070
4071            boolean above = isAboveAnchor();
4072            if (above != mAbove) {
4073                fixDirection(above);
4074            }
4075        }
4076    }
4077
4078    /**
4079     * Returns the Y offset to make the pointy top of the error point
4080     * at the middle of the error icon.
4081     */
4082    private int getErrorX() {
4083        /*
4084         * The "25" is the distance between the point and the right edge
4085         * of the background
4086         */
4087        final float scale = getResources().getDisplayMetrics().density;
4088
4089        final Drawables dr = mDrawables;
4090        return getWidth() - mPopup.getWidth() - getPaddingRight() -
4091                (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f);
4092    }
4093
4094    /**
4095     * Returns the Y offset to make the pointy top of the error point
4096     * at the bottom of the error icon.
4097     */
4098    private int getErrorY() {
4099        /*
4100         * Compound, not extended, because the icon is not clipped
4101         * if the text height is smaller.
4102         */
4103        final int compoundPaddingTop = getCompoundPaddingTop();
4104        int vspace = mBottom - mTop - getCompoundPaddingBottom() - compoundPaddingTop;
4105
4106        final Drawables dr = mDrawables;
4107        int icontop = compoundPaddingTop +
4108                (vspace - (dr != null ? dr.mDrawableHeightRight : 0)) / 2;
4109
4110        /*
4111         * The "2" is the distance between the point and the top edge
4112         * of the background.
4113         */
4114        final float scale = getResources().getDisplayMetrics().density;
4115        return icontop + (dr != null ? dr.mDrawableHeightRight : 0) - getHeight() -
4116                (int) (2 * scale + 0.5f);
4117    }
4118
4119    private void hideError() {
4120        if (mPopup != null) {
4121            if (mPopup.isShowing()) {
4122                mPopup.dismiss();
4123            }
4124        }
4125
4126        mShowErrorAfterAttach = false;
4127    }
4128
4129    private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) {
4130        int wid = tv.getPaddingLeft() + tv.getPaddingRight();
4131        int ht = tv.getPaddingTop() + tv.getPaddingBottom();
4132
4133        int defaultWidthInPixels = getResources().getDimensionPixelSize(
4134                com.android.internal.R.dimen.textview_error_popup_default_width);
4135        Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels,
4136                                    Layout.Alignment.ALIGN_NORMAL, 1, 0, true);
4137        float max = 0;
4138        for (int i = 0; i < l.getLineCount(); i++) {
4139            max = Math.max(max, l.getLineWidth(i));
4140        }
4141
4142        /*
4143         * Now set the popup size to be big enough for the text plus the border capped
4144         * to DEFAULT_MAX_POPUP_WIDTH
4145         */
4146        pop.setWidth(wid + (int) Math.ceil(max));
4147        pop.setHeight(ht + l.getHeight());
4148    }
4149
4150
4151    @Override
4152    protected boolean setFrame(int l, int t, int r, int b) {
4153        boolean result = super.setFrame(l, t, r, b);
4154
4155        if (mPopup != null) {
4156            TextView tv = (TextView) mPopup.getContentView();
4157            chooseSize(mPopup, mError, tv);
4158            mPopup.update(this, getErrorX(), getErrorY(),
4159                          mPopup.getWidth(), mPopup.getHeight());
4160        }
4161
4162        restartMarqueeIfNeeded();
4163
4164        return result;
4165    }
4166
4167    private void restartMarqueeIfNeeded() {
4168        if (mRestartMarquee && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
4169            mRestartMarquee = false;
4170            startMarquee();
4171        }
4172    }
4173
4174    /**
4175     * Sets the list of input filters that will be used if the buffer is
4176     * Editable.  Has no effect otherwise.
4177     *
4178     * @attr ref android.R.styleable#TextView_maxLength
4179     */
4180    public void setFilters(InputFilter[] filters) {
4181        if (filters == null) {
4182            throw new IllegalArgumentException();
4183        }
4184
4185        mFilters = filters;
4186
4187        if (mText instanceof Editable) {
4188            setFilters((Editable) mText, filters);
4189        }
4190    }
4191
4192    /**
4193     * Sets the list of input filters on the specified Editable,
4194     * and includes mInput in the list if it is an InputFilter.
4195     */
4196    private void setFilters(Editable e, InputFilter[] filters) {
4197        if (mInput instanceof InputFilter) {
4198            InputFilter[] nf = new InputFilter[filters.length + 1];
4199
4200            System.arraycopy(filters, 0, nf, 0, filters.length);
4201            nf[filters.length] = (InputFilter) mInput;
4202
4203            e.setFilters(nf);
4204        } else {
4205            e.setFilters(filters);
4206        }
4207    }
4208
4209    /**
4210     * Returns the current list of input filters.
4211     */
4212    public InputFilter[] getFilters() {
4213        return mFilters;
4214    }
4215
4216    /////////////////////////////////////////////////////////////////////////
4217
4218    private int getVerticalOffset(boolean forceNormal) {
4219        int voffset = 0;
4220        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
4221
4222        Layout l = mLayout;
4223        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
4224            l = mHintLayout;
4225        }
4226
4227        if (gravity != Gravity.TOP) {
4228            int boxht;
4229
4230            if (l == mHintLayout) {
4231                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
4232                        getCompoundPaddingBottom();
4233            } else {
4234                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
4235                        getExtendedPaddingBottom();
4236            }
4237            int textht = l.getHeight();
4238
4239            if (textht < boxht) {
4240                if (gravity == Gravity.BOTTOM)
4241                    voffset = boxht - textht;
4242                else // (gravity == Gravity.CENTER_VERTICAL)
4243                    voffset = (boxht - textht) >> 1;
4244            }
4245        }
4246        return voffset;
4247    }
4248
4249    private int getBottomVerticalOffset(boolean forceNormal) {
4250        int voffset = 0;
4251        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
4252
4253        Layout l = mLayout;
4254        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
4255            l = mHintLayout;
4256        }
4257
4258        if (gravity != Gravity.BOTTOM) {
4259            int boxht;
4260
4261            if (l == mHintLayout) {
4262                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
4263                        getCompoundPaddingBottom();
4264            } else {
4265                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
4266                        getExtendedPaddingBottom();
4267            }
4268            int textht = l.getHeight();
4269
4270            if (textht < boxht) {
4271                if (gravity == Gravity.TOP)
4272                    voffset = boxht - textht;
4273                else // (gravity == Gravity.CENTER_VERTICAL)
4274                    voffset = (boxht - textht) >> 1;
4275            }
4276        }
4277        return voffset;
4278    }
4279
4280    private void invalidateCursorPath() {
4281        if (mHighlightPathBogus) {
4282            invalidateCursor();
4283        } else {
4284            final int horizontalPadding = getCompoundPaddingLeft();
4285            final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
4286
4287            if (mCursorCount == 0) {
4288                synchronized (sTempRect) {
4289                    /*
4290                     * The reason for this concern about the thickness of the
4291                     * cursor and doing the floor/ceil on the coordinates is that
4292                     * some EditTexts (notably textfields in the Browser) have
4293                     * anti-aliased text where not all the characters are
4294                     * necessarily at integer-multiple locations.  This should
4295                     * make sure the entire cursor gets invalidated instead of
4296                     * sometimes missing half a pixel.
4297                     */
4298                    float thick = FloatMath.ceil(mTextPaint.getStrokeWidth());
4299                    if (thick < 1.0f) {
4300                        thick = 1.0f;
4301                    }
4302
4303                    thick /= 2.0f;
4304
4305                    mHighlightPath.computeBounds(sTempRect, false);
4306
4307                    invalidate((int) FloatMath.floor(horizontalPadding + sTempRect.left - thick),
4308                            (int) FloatMath.floor(verticalPadding + sTempRect.top - thick),
4309                            (int) FloatMath.ceil(horizontalPadding + sTempRect.right + thick),
4310                            (int) FloatMath.ceil(verticalPadding + sTempRect.bottom + thick));
4311                }
4312            } else {
4313                for (int i = 0; i < mCursorCount; i++) {
4314                    Rect bounds = mCursorDrawable[i].getBounds();
4315                    invalidate(bounds.left + horizontalPadding, bounds.top + verticalPadding,
4316                            bounds.right + horizontalPadding, bounds.bottom + verticalPadding);
4317                }
4318            }
4319        }
4320    }
4321
4322    private void invalidateCursor() {
4323        int where = getSelectionEnd();
4324
4325        invalidateCursor(where, where, where);
4326    }
4327
4328    private void invalidateCursor(int a, int b, int c) {
4329        if (mLayout == null) {
4330            invalidate();
4331        } else {
4332            if (a >= 0 || b >= 0 || c >= 0) {
4333                int first = Math.min(Math.min(a, b), c);
4334                int last = Math.max(Math.max(a, b), c);
4335
4336                int line = mLayout.getLineForOffset(first);
4337                int top = mLayout.getLineTop(line);
4338
4339                // This is ridiculous, but the descent from the line above
4340                // can hang down into the line we really want to redraw,
4341                // so we have to invalidate part of the line above to make
4342                // sure everything that needs to be redrawn really is.
4343                // (But not the whole line above, because that would cause
4344                // the same problem with the descenders on the line above it!)
4345                if (line > 0) {
4346                    top -= mLayout.getLineDescent(line - 1);
4347                }
4348
4349                int line2;
4350
4351                if (first == last)
4352                    line2 = line;
4353                else
4354                    line2 = mLayout.getLineForOffset(last);
4355
4356                int bottom = mLayout.getLineTop(line2 + 1);
4357
4358                final int horizontalPadding = getCompoundPaddingLeft();
4359                final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
4360
4361                // If used, the cursor drawables can have an arbitrary dimension that can go beyond
4362                // the invalidated lines specified above.
4363                for (int i = 0; i < mCursorCount; i++) {
4364                    Rect bounds = mCursorDrawable[i].getBounds();
4365                    top = Math.min(top, bounds.top);
4366                    bottom = Math.max(bottom, bounds.bottom);
4367                    // Horizontal bounds are already full width, no need to update
4368                }
4369
4370                invalidate(horizontalPadding + mScrollX, top + verticalPadding,
4371                        horizontalPadding + mScrollX + getWidth() -
4372                        getCompoundPaddingLeft() - getCompoundPaddingRight(),
4373                        bottom + verticalPadding);
4374            }
4375        }
4376    }
4377
4378    private void registerForPreDraw() {
4379        final ViewTreeObserver observer = getViewTreeObserver();
4380
4381        if (mPreDrawState == PREDRAW_NOT_REGISTERED) {
4382            observer.addOnPreDrawListener(this);
4383            mPreDrawState = PREDRAW_PENDING;
4384        } else if (mPreDrawState == PREDRAW_DONE) {
4385            mPreDrawState = PREDRAW_PENDING;
4386        }
4387
4388        // else state is PREDRAW_PENDING, so keep waiting.
4389    }
4390
4391    /**
4392     * {@inheritDoc}
4393     */
4394    public boolean onPreDraw() {
4395        if (mPreDrawState != PREDRAW_PENDING) {
4396            return true;
4397        }
4398
4399        if (mLayout == null) {
4400            assumeLayout();
4401        }
4402
4403        boolean changed = false;
4404
4405        if (mMovement != null) {
4406            /* This code also provides auto-scrolling when a cursor is moved using a
4407             * CursorController (insertion point or selection limits).
4408             * For selection, ensure start or end is visible depending on controller's state.
4409             */
4410            int curs = getSelectionEnd();
4411            // Do not create the controller if it is not already created.
4412            if (mSelectionModifierCursorController != null &&
4413                    mSelectionModifierCursorController.isSelectionStartDragged()) {
4414                curs = getSelectionStart();
4415            }
4416
4417            /*
4418             * TODO: This should really only keep the end in view if
4419             * it already was before the text changed.  I'm not sure
4420             * of a good way to tell from here if it was.
4421             */
4422            if (curs < 0 &&
4423                  (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
4424                curs = mText.length();
4425            }
4426
4427            if (curs >= 0) {
4428                changed = bringPointIntoView(curs);
4429            }
4430        } else {
4431            changed = bringTextIntoView();
4432        }
4433
4434        // This has to be checked here since:
4435        // - onFocusChanged cannot start it when focus is given to a view with selected text (after
4436        //   a screen rotation) since layout is not yet initialized at that point.
4437        if (mCreatedWithASelection) {
4438            startSelectionActionMode();
4439            mCreatedWithASelection = false;
4440        }
4441
4442        // Phone specific code (there is no ExtractEditText on tablets).
4443        // ExtractEditText does not call onFocus when it is displayed, and mHasSelectionOnFocus can
4444        // not be set. Do the test here instead.
4445        if (this instanceof ExtractEditText && hasSelection()) {
4446            startSelectionActionMode();
4447        }
4448
4449        mPreDrawState = PREDRAW_DONE;
4450        return !changed;
4451    }
4452
4453    @Override
4454    protected void onAttachedToWindow() {
4455        super.onAttachedToWindow();
4456
4457        mTemporaryDetach = false;
4458
4459        if (mShowErrorAfterAttach) {
4460            showError();
4461            mShowErrorAfterAttach = false;
4462        }
4463
4464        final ViewTreeObserver observer = getViewTreeObserver();
4465        // No need to create the controller.
4466        // The get method will add the listener on controller creation.
4467        if (mInsertionPointCursorController != null) {
4468            observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
4469        }
4470        if (mSelectionModifierCursorController != null) {
4471            observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
4472        }
4473
4474        // Resolve drawables as the layout direction has been resolved
4475        resolveDrawables();
4476
4477        updateSpellCheckSpans(0, mText.length());
4478    }
4479
4480    @Override
4481    protected void onDetachedFromWindow() {
4482        super.onDetachedFromWindow();
4483
4484        final ViewTreeObserver observer = getViewTreeObserver();
4485        if (mPreDrawState != PREDRAW_NOT_REGISTERED) {
4486            observer.removeOnPreDrawListener(this);
4487            mPreDrawState = PREDRAW_NOT_REGISTERED;
4488        }
4489
4490        if (mError != null) {
4491            hideError();
4492        }
4493
4494        if (mBlink != null) {
4495            mBlink.removeCallbacks(mBlink);
4496        }
4497
4498        if (mInsertionPointCursorController != null) {
4499            mInsertionPointCursorController.onDetached();
4500        }
4501
4502        if (mSelectionModifierCursorController != null) {
4503            mSelectionModifierCursorController.onDetached();
4504        }
4505
4506        hideControllers();
4507
4508        resetResolvedDrawables();
4509
4510        if (mSpellChecker != null) {
4511            mSpellChecker.closeSession();
4512            // Forces the creation of a new SpellChecker next time this window is created.
4513            // Will handle the cases where the settings has been changed in the meantime.
4514            mSpellChecker = null;
4515        }
4516    }
4517
4518    @Override
4519    protected boolean isPaddingOffsetRequired() {
4520        return mShadowRadius != 0 || mDrawables != null;
4521    }
4522
4523    @Override
4524    protected int getLeftPaddingOffset() {
4525        return getCompoundPaddingLeft() - mPaddingLeft +
4526                (int) Math.min(0, mShadowDx - mShadowRadius);
4527    }
4528
4529    @Override
4530    protected int getTopPaddingOffset() {
4531        return (int) Math.min(0, mShadowDy - mShadowRadius);
4532    }
4533
4534    @Override
4535    protected int getBottomPaddingOffset() {
4536        return (int) Math.max(0, mShadowDy + mShadowRadius);
4537    }
4538
4539    @Override
4540    protected int getRightPaddingOffset() {
4541        return -(getCompoundPaddingRight() - mPaddingRight) +
4542                (int) Math.max(0, mShadowDx + mShadowRadius);
4543    }
4544
4545    @Override
4546    protected boolean verifyDrawable(Drawable who) {
4547        final boolean verified = super.verifyDrawable(who);
4548        if (!verified && mDrawables != null) {
4549            return who == mDrawables.mDrawableLeft || who == mDrawables.mDrawableTop ||
4550                    who == mDrawables.mDrawableRight || who == mDrawables.mDrawableBottom ||
4551                    who == mDrawables.mDrawableStart || who == mDrawables.mDrawableEnd;
4552        }
4553        return verified;
4554    }
4555
4556    @Override
4557    public void jumpDrawablesToCurrentState() {
4558        super.jumpDrawablesToCurrentState();
4559        if (mDrawables != null) {
4560            if (mDrawables.mDrawableLeft != null) {
4561                mDrawables.mDrawableLeft.jumpToCurrentState();
4562            }
4563            if (mDrawables.mDrawableTop != null) {
4564                mDrawables.mDrawableTop.jumpToCurrentState();
4565            }
4566            if (mDrawables.mDrawableRight != null) {
4567                mDrawables.mDrawableRight.jumpToCurrentState();
4568            }
4569            if (mDrawables.mDrawableBottom != null) {
4570                mDrawables.mDrawableBottom.jumpToCurrentState();
4571            }
4572            if (mDrawables.mDrawableStart != null) {
4573                mDrawables.mDrawableStart.jumpToCurrentState();
4574            }
4575            if (mDrawables.mDrawableEnd != null) {
4576                mDrawables.mDrawableEnd.jumpToCurrentState();
4577            }
4578        }
4579    }
4580
4581    @Override
4582    public void invalidateDrawable(Drawable drawable) {
4583        if (verifyDrawable(drawable)) {
4584            final Rect dirty = drawable.getBounds();
4585            int scrollX = mScrollX;
4586            int scrollY = mScrollY;
4587
4588            // IMPORTANT: The coordinates below are based on the coordinates computed
4589            // for each compound drawable in onDraw(). Make sure to update each section
4590            // accordingly.
4591            final TextView.Drawables drawables = mDrawables;
4592            if (drawables != null) {
4593                if (drawable == drawables.mDrawableLeft) {
4594                    final int compoundPaddingTop = getCompoundPaddingTop();
4595                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4596                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4597
4598                    scrollX += mPaddingLeft;
4599                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightLeft) / 2;
4600                } else if (drawable == drawables.mDrawableRight) {
4601                    final int compoundPaddingTop = getCompoundPaddingTop();
4602                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4603                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4604
4605                    scrollX += (mRight - mLeft - mPaddingRight - drawables.mDrawableSizeRight);
4606                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightRight) / 2;
4607                } else if (drawable == drawables.mDrawableTop) {
4608                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4609                    final int compoundPaddingRight = getCompoundPaddingRight();
4610                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4611
4612                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthTop) / 2;
4613                    scrollY += mPaddingTop;
4614                } else if (drawable == drawables.mDrawableBottom) {
4615                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4616                    final int compoundPaddingRight = getCompoundPaddingRight();
4617                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4618
4619                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthBottom) / 2;
4620                    scrollY += (mBottom - mTop - mPaddingBottom - drawables.mDrawableSizeBottom);
4621                }
4622            }
4623
4624            invalidate(dirty.left + scrollX, dirty.top + scrollY,
4625                    dirty.right + scrollX, dirty.bottom + scrollY);
4626        }
4627    }
4628
4629    /**
4630     * @hide
4631     */
4632    @Override
4633    public int getResolvedLayoutDirection(Drawable who) {
4634        if (who == null) return View.LAYOUT_DIRECTION_LTR;
4635        if (mDrawables != null) {
4636            final Drawables drawables = mDrawables;
4637            if (who == drawables.mDrawableLeft || who == drawables.mDrawableRight ||
4638                who == drawables.mDrawableTop || who == drawables.mDrawableBottom ||
4639                who == drawables.mDrawableStart || who == drawables.mDrawableEnd) {
4640                return getResolvedLayoutDirection();
4641            }
4642        }
4643        return super.getResolvedLayoutDirection(who);
4644    }
4645
4646    @Override
4647    protected boolean onSetAlpha(int alpha) {
4648        // Alpha is supported if and only if the drawing can be done in one pass.
4649        // TODO text with spans with a background color currently do not respect this alpha.
4650        if (getBackground() == null) {
4651            mCurrentAlpha = alpha;
4652            final Drawables dr = mDrawables;
4653            if (dr != null) {
4654                if (dr.mDrawableLeft != null) dr.mDrawableLeft.mutate().setAlpha(alpha);
4655                if (dr.mDrawableTop != null) dr.mDrawableTop.mutate().setAlpha(alpha);
4656                if (dr.mDrawableRight != null) dr.mDrawableRight.mutate().setAlpha(alpha);
4657                if (dr.mDrawableBottom != null) dr.mDrawableBottom.mutate().setAlpha(alpha);
4658                if (dr.mDrawableStart != null) dr.mDrawableStart.mutate().setAlpha(alpha);
4659                if (dr.mDrawableEnd != null) dr.mDrawableEnd.mutate().setAlpha(alpha);
4660            }
4661            return true;
4662        }
4663
4664        mCurrentAlpha = 255;
4665        return false;
4666    }
4667
4668    /**
4669     * When a TextView is used to display a useful piece of information to the user (such as a
4670     * contact's address), it should be made selectable, so that the user can select and copy this
4671     * content.
4672     *
4673     * Use {@link #setTextIsSelectable(boolean)} or the
4674     * {@link android.R.styleable#TextView_textIsSelectable} XML attribute to make this TextView
4675     * selectable (text is not selectable by default).
4676     *
4677     * Note that this method simply returns the state of this flag. Although this flag has to be set
4678     * in order to select text in non-editable TextView, the content of an {@link EditText} can
4679     * always be selected, independently of the value of this flag.
4680     *
4681     * @return True if the text displayed in this TextView can be selected by the user.
4682     *
4683     * @attr ref android.R.styleable#TextView_textIsSelectable
4684     */
4685    public boolean isTextSelectable() {
4686        return mTextIsSelectable;
4687    }
4688
4689    /**
4690     * Sets whether or not (default) the content of this view is selectable by the user.
4691     *
4692     * Note that this methods affect the {@link #setFocusable(boolean)},
4693     * {@link #setFocusableInTouchMode(boolean)} {@link #setClickable(boolean)} and
4694     * {@link #setLongClickable(boolean)} states and you may want to restore these if they were
4695     * customized.
4696     *
4697     * See {@link #isTextSelectable} for details.
4698     *
4699     * @param selectable Whether or not the content of this TextView should be selectable.
4700     */
4701    public void setTextIsSelectable(boolean selectable) {
4702        if (mTextIsSelectable == selectable) return;
4703
4704        mTextIsSelectable = selectable;
4705
4706        setFocusableInTouchMode(selectable);
4707        setFocusable(selectable);
4708        setClickable(selectable);
4709        setLongClickable(selectable);
4710
4711        // mInputType is already EditorInfo.TYPE_NULL and mInput is null;
4712
4713        setMovementMethod(selectable ? ArrowKeyMovementMethod.getInstance() : null);
4714        setText(getText(), selectable ? BufferType.SPANNABLE : BufferType.NORMAL);
4715
4716        // Called by setText above, but safer in case of future code changes
4717        prepareCursorControllers();
4718    }
4719
4720    @Override
4721    protected int[] onCreateDrawableState(int extraSpace) {
4722        final int[] drawableState;
4723
4724        if (mSingleLine) {
4725            drawableState = super.onCreateDrawableState(extraSpace);
4726        } else {
4727            drawableState = super.onCreateDrawableState(extraSpace + 1);
4728            mergeDrawableStates(drawableState, MULTILINE_STATE_SET);
4729        }
4730
4731        if (mTextIsSelectable) {
4732            // Disable pressed state, which was introduced when TextView was made clickable.
4733            // Prevents text color change.
4734            // setClickable(false) would have a similar effect, but it also disables focus changes
4735            // and long press actions, which are both needed by text selection.
4736            final int length = drawableState.length;
4737            for (int i = 0; i < length; i++) {
4738                if (drawableState[i] == R.attr.state_pressed) {
4739                    final int[] nonPressedState = new int[length - 1];
4740                    System.arraycopy(drawableState, 0, nonPressedState, 0, i);
4741                    System.arraycopy(drawableState, i + 1, nonPressedState, i, length - i - 1);
4742                    return nonPressedState;
4743                }
4744            }
4745        }
4746
4747        return drawableState;
4748    }
4749
4750    @Override
4751    protected void onDraw(Canvas canvas) {
4752        if (mPreDrawState == PREDRAW_DONE) {
4753            final ViewTreeObserver observer = getViewTreeObserver();
4754            observer.removeOnPreDrawListener(this);
4755            mPreDrawState = PREDRAW_NOT_REGISTERED;
4756        }
4757
4758        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return;
4759
4760        restartMarqueeIfNeeded();
4761
4762        // Draw the background for this view
4763        super.onDraw(canvas);
4764
4765        final int compoundPaddingLeft = getCompoundPaddingLeft();
4766        final int compoundPaddingTop = getCompoundPaddingTop();
4767        final int compoundPaddingRight = getCompoundPaddingRight();
4768        final int compoundPaddingBottom = getCompoundPaddingBottom();
4769        final int scrollX = mScrollX;
4770        final int scrollY = mScrollY;
4771        final int right = mRight;
4772        final int left = mLeft;
4773        final int bottom = mBottom;
4774        final int top = mTop;
4775
4776        final Drawables dr = mDrawables;
4777        if (dr != null) {
4778            /*
4779             * Compound, not extended, because the icon is not clipped
4780             * if the text height is smaller.
4781             */
4782
4783            int vspace = bottom - top - compoundPaddingBottom - compoundPaddingTop;
4784            int hspace = right - left - compoundPaddingRight - compoundPaddingLeft;
4785
4786            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4787            // Make sure to update invalidateDrawable() when changing this code.
4788            if (dr.mDrawableLeft != null) {
4789                canvas.save();
4790                canvas.translate(scrollX + mPaddingLeft,
4791                                 scrollY + compoundPaddingTop +
4792                                 (vspace - dr.mDrawableHeightLeft) / 2);
4793                dr.mDrawableLeft.draw(canvas);
4794                canvas.restore();
4795            }
4796
4797            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4798            // Make sure to update invalidateDrawable() when changing this code.
4799            if (dr.mDrawableRight != null) {
4800                canvas.save();
4801                canvas.translate(scrollX + right - left - mPaddingRight - dr.mDrawableSizeRight,
4802                         scrollY + compoundPaddingTop + (vspace - dr.mDrawableHeightRight) / 2);
4803                dr.mDrawableRight.draw(canvas);
4804                canvas.restore();
4805            }
4806
4807            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4808            // Make sure to update invalidateDrawable() when changing this code.
4809            if (dr.mDrawableTop != null) {
4810                canvas.save();
4811                canvas.translate(scrollX + compoundPaddingLeft + (hspace - dr.mDrawableWidthTop) / 2,
4812                        scrollY + mPaddingTop);
4813                dr.mDrawableTop.draw(canvas);
4814                canvas.restore();
4815            }
4816
4817            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4818            // Make sure to update invalidateDrawable() when changing this code.
4819            if (dr.mDrawableBottom != null) {
4820                canvas.save();
4821                canvas.translate(scrollX + compoundPaddingLeft +
4822                        (hspace - dr.mDrawableWidthBottom) / 2,
4823                         scrollY + bottom - top - mPaddingBottom - dr.mDrawableSizeBottom);
4824                dr.mDrawableBottom.draw(canvas);
4825                canvas.restore();
4826            }
4827        }
4828
4829        int color = mCurTextColor;
4830
4831        if (mLayout == null) {
4832            assumeLayout();
4833        }
4834
4835        Layout layout = mLayout;
4836        int cursorcolor = color;
4837
4838        if (mHint != null && mText.length() == 0) {
4839            if (mHintTextColor != null) {
4840                color = mCurHintTextColor;
4841            }
4842
4843            layout = mHintLayout;
4844        }
4845
4846        mTextPaint.setColor(color);
4847        if (mCurrentAlpha != 255) {
4848            // If set, the alpha will override the color's alpha. Multiply the alphas.
4849            mTextPaint.setAlpha((mCurrentAlpha * Color.alpha(color)) / 255);
4850        }
4851        mTextPaint.drawableState = getDrawableState();
4852
4853        canvas.save();
4854        /*  Would be faster if we didn't have to do this. Can we chop the
4855            (displayable) text so that we don't need to do this ever?
4856        */
4857
4858        int extendedPaddingTop = getExtendedPaddingTop();
4859        int extendedPaddingBottom = getExtendedPaddingBottom();
4860
4861        float clipLeft = compoundPaddingLeft + scrollX;
4862        float clipTop = extendedPaddingTop + scrollY;
4863        float clipRight = right - left - compoundPaddingRight + scrollX;
4864        float clipBottom = bottom - top - extendedPaddingBottom + scrollY;
4865
4866        if (mShadowRadius != 0) {
4867            clipLeft += Math.min(0, mShadowDx - mShadowRadius);
4868            clipRight += Math.max(0, mShadowDx + mShadowRadius);
4869
4870            clipTop += Math.min(0, mShadowDy - mShadowRadius);
4871            clipBottom += Math.max(0, mShadowDy + mShadowRadius);
4872        }
4873
4874        canvas.clipRect(clipLeft, clipTop, clipRight, clipBottom);
4875
4876        int voffsetText = 0;
4877        int voffsetCursor = 0;
4878
4879        // translate in by our padding
4880        {
4881            /* shortcircuit calling getVerticaOffset() */
4882            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4883                voffsetText = getVerticalOffset(false);
4884                voffsetCursor = getVerticalOffset(true);
4885            }
4886            canvas.translate(compoundPaddingLeft, extendedPaddingTop + voffsetText);
4887        }
4888
4889        final int layoutDirection = getResolvedLayoutDirection();
4890        final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
4891        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
4892                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
4893            if (!mSingleLine && getLineCount() == 1 && canMarquee() &&
4894                    (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) != Gravity.LEFT) {
4895                canvas.translate(mLayout.getLineRight(0) - (mRight - mLeft -
4896                        getCompoundPaddingLeft() - getCompoundPaddingRight()), 0.0f);
4897            }
4898
4899            if (mMarquee != null && mMarquee.isRunning()) {
4900                canvas.translate(-mMarquee.mScroll, 0.0f);
4901            }
4902        }
4903
4904        Path highlight = null;
4905        int selStart = -1, selEnd = -1;
4906        boolean drawCursor = false;
4907
4908        //  If there is no movement method, then there can be no selection.
4909        //  Check that first and attempt to skip everything having to do with
4910        //  the cursor.
4911        //  XXX This is not strictly true -- a program could set the
4912        //  selection manually if it really wanted to.
4913        if (mMovement != null && (isFocused() || isPressed())) {
4914            selStart = getSelectionStart();
4915            selEnd = getSelectionEnd();
4916
4917            if (selStart >= 0) {
4918                if (mHighlightPath == null) mHighlightPath = new Path();
4919
4920                if (selStart == selEnd) {
4921                    if (isCursorVisible() &&
4922                            (SystemClock.uptimeMillis() - mShowCursor) % (2 * BLINK) < BLINK) {
4923                        if (mHighlightPathBogus) {
4924                            mHighlightPath.reset();
4925                            mLayout.getCursorPath(selStart, mHighlightPath, mText);
4926                            updateCursorsPositions();
4927                            mHighlightPathBogus = false;
4928                        }
4929
4930                        // XXX should pass to skin instead of drawing directly
4931                        mHighlightPaint.setColor(cursorcolor);
4932                        if (mCurrentAlpha != 255) {
4933                            mHighlightPaint.setAlpha(
4934                                    (mCurrentAlpha * Color.alpha(cursorcolor)) / 255);
4935                        }
4936                        mHighlightPaint.setStyle(Paint.Style.STROKE);
4937                        highlight = mHighlightPath;
4938                        drawCursor = mCursorCount > 0;
4939                    }
4940                } else if (textCanBeSelected()) {
4941                    if (mHighlightPathBogus) {
4942                        mHighlightPath.reset();
4943                        mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
4944                        mHighlightPathBogus = false;
4945                    }
4946
4947                    // XXX should pass to skin instead of drawing directly
4948                    mHighlightPaint.setColor(mHighlightColor);
4949                    if (mCurrentAlpha != 255) {
4950                        mHighlightPaint.setAlpha(
4951                                (mCurrentAlpha * Color.alpha(mHighlightColor)) / 255);
4952                    }
4953                    mHighlightPaint.setStyle(Paint.Style.FILL);
4954
4955                    highlight = mHighlightPath;
4956                }
4957            }
4958        }
4959
4960        /*  Comment out until we decide what to do about animations
4961        boolean isLinearTextOn = false;
4962        if (currentTransformation != null) {
4963            isLinearTextOn = mTextPaint.isLinearTextOn();
4964            Matrix m = currentTransformation.getMatrix();
4965            if (!m.isIdentity()) {
4966                // mTextPaint.setLinearTextOn(true);
4967            }
4968        }
4969        */
4970
4971        final InputMethodState ims = mInputMethodState;
4972        final int cursorOffsetVertical = voffsetCursor - voffsetText;
4973        if (ims != null && ims.mBatchEditNesting == 0) {
4974            InputMethodManager imm = InputMethodManager.peekInstance();
4975            if (imm != null) {
4976                if (imm.isActive(this)) {
4977                    boolean reported = false;
4978                    if (ims.mContentChanged || ims.mSelectionModeChanged) {
4979                        // We are in extract mode and the content has changed
4980                        // in some way... just report complete new text to the
4981                        // input method.
4982                        reported = reportExtractedText();
4983                    }
4984                    if (!reported && highlight != null) {
4985                        int candStart = -1;
4986                        int candEnd = -1;
4987                        if (mText instanceof Spannable) {
4988                            Spannable sp = (Spannable)mText;
4989                            candStart = EditableInputConnection.getComposingSpanStart(sp);
4990                            candEnd = EditableInputConnection.getComposingSpanEnd(sp);
4991                        }
4992                        imm.updateSelection(this, selStart, selEnd, candStart, candEnd);
4993                    }
4994                }
4995
4996                if (imm.isWatchingCursor(this) && highlight != null) {
4997                    highlight.computeBounds(ims.mTmpRectF, true);
4998                    ims.mTmpOffset[0] = ims.mTmpOffset[1] = 0;
4999
5000                    canvas.getMatrix().mapPoints(ims.mTmpOffset);
5001                    ims.mTmpRectF.offset(ims.mTmpOffset[0], ims.mTmpOffset[1]);
5002
5003                    ims.mTmpRectF.offset(0, cursorOffsetVertical);
5004
5005                    ims.mCursorRectInWindow.set((int)(ims.mTmpRectF.left + 0.5),
5006                            (int)(ims.mTmpRectF.top + 0.5),
5007                            (int)(ims.mTmpRectF.right + 0.5),
5008                            (int)(ims.mTmpRectF.bottom + 0.5));
5009
5010                    imm.updateCursor(this,
5011                            ims.mCursorRectInWindow.left, ims.mCursorRectInWindow.top,
5012                            ims.mCursorRectInWindow.right, ims.mCursorRectInWindow.bottom);
5013                }
5014            }
5015        }
5016
5017        if (mCorrectionHighlighter != null) {
5018            mCorrectionHighlighter.draw(canvas, cursorOffsetVertical);
5019        }
5020
5021        if (drawCursor) {
5022            drawCursor(canvas, cursorOffsetVertical);
5023            // Rely on the drawable entirely, do not draw the cursor line.
5024            // Has to be done after the IMM related code above which relies on the highlight.
5025            highlight = null;
5026        }
5027
5028        layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
5029
5030        if (mMarquee != null && mMarquee.shouldDrawGhost()) {
5031            canvas.translate((int) mMarquee.getGhostOffset(), 0.0f);
5032            layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
5033        }
5034
5035        /*  Comment out until we decide what to do about animations
5036        if (currentTransformation != null) {
5037            mTextPaint.setLinearTextOn(isLinearTextOn);
5038        }
5039        */
5040
5041        canvas.restore();
5042    }
5043
5044    private void updateCursorsPositions() {
5045        if (mCursorDrawableRes == 0) {
5046            mCursorCount = 0;
5047            return;
5048        }
5049
5050        final int offset = getSelectionStart();
5051        final int line = mLayout.getLineForOffset(offset);
5052        final int top = mLayout.getLineTop(line);
5053        final int bottom = mLayout.getLineTop(line + 1);
5054
5055        mCursorCount = mLayout.isLevelBoundary(offset) ? 2 : 1;
5056
5057        int middle = bottom;
5058        if (mCursorCount == 2) {
5059            // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)}
5060            middle = (top + bottom) >> 1;
5061        }
5062
5063        updateCursorPosition(0, top, middle, mLayout.getPrimaryHorizontal(offset));
5064
5065        if (mCursorCount == 2) {
5066            updateCursorPosition(1, middle, bottom, mLayout.getSecondaryHorizontal(offset));
5067        }
5068    }
5069
5070    private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) {
5071        if (mCursorDrawable[cursorIndex] == null)
5072            mCursorDrawable[cursorIndex] = mContext.getResources().getDrawable(mCursorDrawableRes);
5073
5074        if (mTempRect == null) mTempRect = new Rect();
5075
5076        mCursorDrawable[cursorIndex].getPadding(mTempRect);
5077        final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth();
5078        horizontal = Math.max(0.5f, horizontal - 0.5f);
5079        final int left = (int) (horizontal) - mTempRect.left;
5080        mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width,
5081                bottom + mTempRect.bottom);
5082    }
5083
5084    private void drawCursor(Canvas canvas, int cursorOffsetVertical) {
5085        final boolean translate = cursorOffsetVertical != 0;
5086        if (translate) canvas.translate(0, cursorOffsetVertical);
5087        for (int i = 0; i < mCursorCount; i++) {
5088            mCursorDrawable[i].draw(canvas);
5089        }
5090        if (translate) canvas.translate(0, -cursorOffsetVertical);
5091    }
5092
5093    @Override
5094    public void getFocusedRect(Rect r) {
5095        if (mLayout == null) {
5096            super.getFocusedRect(r);
5097            return;
5098        }
5099
5100        int selEnd = getSelectionEnd();
5101        if (selEnd < 0) {
5102            super.getFocusedRect(r);
5103            return;
5104        }
5105
5106        int selStart = getSelectionStart();
5107        if (selStart < 0 || selStart >= selEnd) {
5108            int line = mLayout.getLineForOffset(selEnd);
5109            r.top = mLayout.getLineTop(line);
5110            r.bottom = mLayout.getLineBottom(line);
5111            r.left = (int) mLayout.getPrimaryHorizontal(selEnd) - 2;
5112            r.right = r.left + 4;
5113        } else {
5114            int lineStart = mLayout.getLineForOffset(selStart);
5115            int lineEnd = mLayout.getLineForOffset(selEnd);
5116            r.top = mLayout.getLineTop(lineStart);
5117            r.bottom = mLayout.getLineBottom(lineEnd);
5118            if (lineStart == lineEnd) {
5119                r.left = (int) mLayout.getPrimaryHorizontal(selStart);
5120                r.right = (int) mLayout.getPrimaryHorizontal(selEnd);
5121            } else {
5122                // Selection extends across multiple lines -- the focused
5123                // rect covers the entire width.
5124                if (mHighlightPath == null) mHighlightPath = new Path();
5125                if (mHighlightPathBogus) {
5126                    mHighlightPath.reset();
5127                    mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
5128                    mHighlightPathBogus = false;
5129                }
5130                synchronized (sTempRect) {
5131                    mHighlightPath.computeBounds(sTempRect, true);
5132                    r.left = (int)sTempRect.left-1;
5133                    r.right = (int)sTempRect.right+1;
5134                }
5135            }
5136        }
5137
5138        // Adjust for padding and gravity.
5139        int paddingLeft = getCompoundPaddingLeft();
5140        int paddingTop = getExtendedPaddingTop();
5141        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5142            paddingTop += getVerticalOffset(false);
5143        }
5144        r.offset(paddingLeft, paddingTop);
5145    }
5146
5147    /**
5148     * Return the number of lines of text, or 0 if the internal Layout has not
5149     * been built.
5150     */
5151    public int getLineCount() {
5152        return mLayout != null ? mLayout.getLineCount() : 0;
5153    }
5154
5155    /**
5156     * Return the baseline for the specified line (0...getLineCount() - 1)
5157     * If bounds is not null, return the top, left, right, bottom extents
5158     * of the specified line in it. If the internal Layout has not been built,
5159     * return 0 and set bounds to (0, 0, 0, 0)
5160     * @param line which line to examine (0..getLineCount() - 1)
5161     * @param bounds Optional. If not null, it returns the extent of the line
5162     * @return the Y-coordinate of the baseline
5163     */
5164    public int getLineBounds(int line, Rect bounds) {
5165        if (mLayout == null) {
5166            if (bounds != null) {
5167                bounds.set(0, 0, 0, 0);
5168            }
5169            return 0;
5170        }
5171        else {
5172            int baseline = mLayout.getLineBounds(line, bounds);
5173
5174            int voffset = getExtendedPaddingTop();
5175            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5176                voffset += getVerticalOffset(true);
5177            }
5178            if (bounds != null) {
5179                bounds.offset(getCompoundPaddingLeft(), voffset);
5180            }
5181            return baseline + voffset;
5182        }
5183    }
5184
5185    @Override
5186    public int getBaseline() {
5187        if (mLayout == null) {
5188            return super.getBaseline();
5189        }
5190
5191        int voffset = 0;
5192        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5193            voffset = getVerticalOffset(true);
5194        }
5195
5196        return getExtendedPaddingTop() + voffset + mLayout.getLineBaseline(0);
5197    }
5198
5199    /**
5200     * @hide
5201     * @param offsetRequired
5202     */
5203    @Override
5204    protected int getFadeTop(boolean offsetRequired) {
5205        if (mLayout == null) return 0;
5206
5207        int voffset = 0;
5208        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5209            voffset = getVerticalOffset(true);
5210        }
5211
5212        if (offsetRequired) voffset += getTopPaddingOffset();
5213
5214        return getExtendedPaddingTop() + voffset;
5215    }
5216
5217    /**
5218     * @hide
5219     * @param offsetRequired
5220     */
5221    @Override
5222    protected int getFadeHeight(boolean offsetRequired) {
5223        return mLayout != null ? mLayout.getHeight() : 0;
5224    }
5225
5226    @Override
5227    public boolean onKeyPreIme(int keyCode, KeyEvent event) {
5228        if (keyCode == KeyEvent.KEYCODE_BACK) {
5229            boolean isInSelectionMode = mSelectionActionMode != null;
5230
5231            if (isInSelectionMode) {
5232                if (event.getAction() == KeyEvent.ACTION_DOWN && event.getRepeatCount() == 0) {
5233                    KeyEvent.DispatcherState state = getKeyDispatcherState();
5234                    if (state != null) {
5235                        state.startTracking(event, this);
5236                    }
5237                    return true;
5238                } else if (event.getAction() == KeyEvent.ACTION_UP) {
5239                    KeyEvent.DispatcherState state = getKeyDispatcherState();
5240                    if (state != null) {
5241                        state.handleUpEvent(event);
5242                    }
5243                    if (event.isTracking() && !event.isCanceled()) {
5244                        if (isInSelectionMode) {
5245                            stopSelectionActionMode();
5246                            return true;
5247                        }
5248                    }
5249                }
5250            }
5251        }
5252        return super.onKeyPreIme(keyCode, event);
5253    }
5254
5255    @Override
5256    public boolean onKeyDown(int keyCode, KeyEvent event) {
5257        int which = doKeyDown(keyCode, event, null);
5258        if (which == 0) {
5259            // Go through default dispatching.
5260            return super.onKeyDown(keyCode, event);
5261        }
5262
5263        return true;
5264    }
5265
5266    @Override
5267    public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) {
5268        KeyEvent down = KeyEvent.changeAction(event, KeyEvent.ACTION_DOWN);
5269
5270        int which = doKeyDown(keyCode, down, event);
5271        if (which == 0) {
5272            // Go through default dispatching.
5273            return super.onKeyMultiple(keyCode, repeatCount, event);
5274        }
5275        if (which == -1) {
5276            // Consumed the whole thing.
5277            return true;
5278        }
5279
5280        repeatCount--;
5281
5282        // We are going to dispatch the remaining events to either the input
5283        // or movement method.  To do this, we will just send a repeated stream
5284        // of down and up events until we have done the complete repeatCount.
5285        // It would be nice if those interfaces had an onKeyMultiple() method,
5286        // but adding that is a more complicated change.
5287        KeyEvent up = KeyEvent.changeAction(event, KeyEvent.ACTION_UP);
5288        if (which == 1) {
5289            mInput.onKeyUp(this, (Editable)mText, keyCode, up);
5290            while (--repeatCount > 0) {
5291                mInput.onKeyDown(this, (Editable)mText, keyCode, down);
5292                mInput.onKeyUp(this, (Editable)mText, keyCode, up);
5293            }
5294            hideErrorIfUnchanged();
5295
5296        } else if (which == 2) {
5297            mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
5298            while (--repeatCount > 0) {
5299                mMovement.onKeyDown(this, (Spannable)mText, keyCode, down);
5300                mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
5301            }
5302        }
5303
5304        return true;
5305    }
5306
5307    /**
5308     * Returns true if pressing ENTER in this field advances focus instead
5309     * of inserting the character.  This is true mostly in single-line fields,
5310     * but also in mail addresses and subjects which will display on multiple
5311     * lines but where it doesn't make sense to insert newlines.
5312     */
5313    private boolean shouldAdvanceFocusOnEnter() {
5314        if (mInput == null) {
5315            return false;
5316        }
5317
5318        if (mSingleLine) {
5319            return true;
5320        }
5321
5322        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
5323            int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
5324            if (variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_ADDRESS
5325                    || variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT) {
5326                return true;
5327            }
5328        }
5329
5330        return false;
5331    }
5332
5333    /**
5334     * Returns true if pressing TAB in this field advances focus instead
5335     * of inserting the character.  Insert tabs only in multi-line editors.
5336     */
5337    private boolean shouldAdvanceFocusOnTab() {
5338        if (mInput != null && !mSingleLine) {
5339            if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
5340                int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
5341                if (variation == EditorInfo.TYPE_TEXT_FLAG_IME_MULTI_LINE
5342                        || variation == EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE) {
5343                    return false;
5344                }
5345            }
5346        }
5347        return true;
5348    }
5349
5350    private int doKeyDown(int keyCode, KeyEvent event, KeyEvent otherEvent) {
5351        if (!isEnabled()) {
5352            return 0;
5353        }
5354
5355        switch (keyCode) {
5356            case KeyEvent.KEYCODE_ENTER:
5357                mEnterKeyIsDown = true;
5358                if (event.hasNoModifiers()) {
5359                    // When mInputContentType is set, we know that we are
5360                    // running in a "modern" cupcake environment, so don't need
5361                    // to worry about the application trying to capture
5362                    // enter key events.
5363                    if (mInputContentType != null) {
5364                        // If there is an action listener, given them a
5365                        // chance to consume the event.
5366                        if (mInputContentType.onEditorActionListener != null &&
5367                                mInputContentType.onEditorActionListener.onEditorAction(
5368                                this, EditorInfo.IME_NULL, event)) {
5369                            mInputContentType.enterDown = true;
5370                            // We are consuming the enter key for them.
5371                            return -1;
5372                        }
5373                    }
5374
5375                    // If our editor should move focus when enter is pressed, or
5376                    // this is a generated event from an IME action button, then
5377                    // don't let it be inserted into the text.
5378                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
5379                            || shouldAdvanceFocusOnEnter()) {
5380                        if (mOnClickListener != null) {
5381                            return 0;
5382                        }
5383                        return -1;
5384                    }
5385                }
5386                break;
5387
5388            case KeyEvent.KEYCODE_DPAD_CENTER:
5389                mDPadCenterIsDown = true;
5390                if (event.hasNoModifiers()) {
5391                    if (shouldAdvanceFocusOnEnter()) {
5392                        return 0;
5393                    }
5394                }
5395                break;
5396
5397            case KeyEvent.KEYCODE_TAB:
5398                if (event.hasNoModifiers() || event.hasModifiers(KeyEvent.META_SHIFT_ON)) {
5399                    if (shouldAdvanceFocusOnTab()) {
5400                        return 0;
5401                    }
5402                }
5403                break;
5404
5405                // Has to be done on key down (and not on key up) to correctly be intercepted.
5406            case KeyEvent.KEYCODE_BACK:
5407                if (mSelectionActionMode != null) {
5408                    stopSelectionActionMode();
5409                    return -1;
5410                }
5411                break;
5412        }
5413
5414        if (mInput != null) {
5415            resetErrorChangedFlag();
5416
5417            boolean doDown = true;
5418            if (otherEvent != null) {
5419                try {
5420                    beginBatchEdit();
5421                    final boolean handled = mInput.onKeyOther(this, (Editable) mText, otherEvent);
5422                    hideErrorIfUnchanged();
5423                    doDown = false;
5424                    if (handled) {
5425                        return -1;
5426                    }
5427                } catch (AbstractMethodError e) {
5428                    // onKeyOther was added after 1.0, so if it isn't
5429                    // implemented we need to try to dispatch as a regular down.
5430                } finally {
5431                    endBatchEdit();
5432                }
5433            }
5434
5435            if (doDown) {
5436                beginBatchEdit();
5437                final boolean handled = mInput.onKeyDown(this, (Editable) mText, keyCode, event);
5438                endBatchEdit();
5439                hideErrorIfUnchanged();
5440                if (handled) return 1;
5441            }
5442        }
5443
5444        // bug 650865: sometimes we get a key event before a layout.
5445        // don't try to move around if we don't know the layout.
5446
5447        if (mMovement != null && mLayout != null) {
5448            boolean doDown = true;
5449            if (otherEvent != null) {
5450                try {
5451                    boolean handled = mMovement.onKeyOther(this, (Spannable) mText,
5452                            otherEvent);
5453                    doDown = false;
5454                    if (handled) {
5455                        return -1;
5456                    }
5457                } catch (AbstractMethodError e) {
5458                    // onKeyOther was added after 1.0, so if it isn't
5459                    // implemented we need to try to dispatch as a regular down.
5460                }
5461            }
5462            if (doDown) {
5463                if (mMovement.onKeyDown(this, (Spannable)mText, keyCode, event))
5464                    return 2;
5465            }
5466        }
5467
5468        return 0;
5469    }
5470
5471    /**
5472     * Resets the mErrorWasChanged flag, so that future calls to {@link #setError(CharSequence)}
5473     * can be recorded.
5474     * @hide
5475     */
5476    public void resetErrorChangedFlag() {
5477        /*
5478         * Keep track of what the error was before doing the input
5479         * so that if an input filter changed the error, we leave
5480         * that error showing.  Otherwise, we take down whatever
5481         * error was showing when the user types something.
5482         */
5483        mErrorWasChanged = false;
5484    }
5485
5486    /**
5487     * @hide
5488     */
5489    public void hideErrorIfUnchanged() {
5490        if (mError != null && !mErrorWasChanged) {
5491            setError(null, null);
5492        }
5493    }
5494
5495    @Override
5496    public boolean onKeyUp(int keyCode, KeyEvent event) {
5497        if (!isEnabled()) {
5498            return super.onKeyUp(keyCode, event);
5499        }
5500
5501        switch (keyCode) {
5502            case KeyEvent.KEYCODE_DPAD_CENTER:
5503                mDPadCenterIsDown = false;
5504                if (event.hasNoModifiers()) {
5505                    /*
5506                     * If there is a click listener, just call through to
5507                     * super, which will invoke it.
5508                     *
5509                     * If there isn't a click listener, try to show the soft
5510                     * input method.  (It will also
5511                     * call performClick(), but that won't do anything in
5512                     * this case.)
5513                     */
5514                    if (mOnClickListener == null) {
5515                        if (mMovement != null && mText instanceof Editable
5516                                && mLayout != null && onCheckIsTextEditor()) {
5517                            InputMethodManager imm = InputMethodManager.peekInstance();
5518                            viewClicked(imm);
5519                            if (imm != null && mSoftInputShownOnFocus) {
5520                                imm.showSoftInput(this, 0);
5521                            }
5522                        }
5523                    }
5524                }
5525                return super.onKeyUp(keyCode, event);
5526
5527            case KeyEvent.KEYCODE_ENTER:
5528                mEnterKeyIsDown = false;
5529                if (event.hasNoModifiers()) {
5530                    if (mInputContentType != null
5531                            && mInputContentType.onEditorActionListener != null
5532                            && mInputContentType.enterDown) {
5533                        mInputContentType.enterDown = false;
5534                        if (mInputContentType.onEditorActionListener.onEditorAction(
5535                                this, EditorInfo.IME_NULL, event)) {
5536                            return true;
5537                        }
5538                    }
5539
5540                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
5541                            || shouldAdvanceFocusOnEnter()) {
5542                        /*
5543                         * If there is a click listener, just call through to
5544                         * super, which will invoke it.
5545                         *
5546                         * If there isn't a click listener, try to advance focus,
5547                         * but still call through to super, which will reset the
5548                         * pressed state and longpress state.  (It will also
5549                         * call performClick(), but that won't do anything in
5550                         * this case.)
5551                         */
5552                        if (mOnClickListener == null) {
5553                            View v = focusSearch(FOCUS_DOWN);
5554
5555                            if (v != null) {
5556                                if (!v.requestFocus(FOCUS_DOWN)) {
5557                                    throw new IllegalStateException(
5558                                            "focus search returned a view " +
5559                                            "that wasn't able to take focus!");
5560                                }
5561
5562                                /*
5563                                 * Return true because we handled the key; super
5564                                 * will return false because there was no click
5565                                 * listener.
5566                                 */
5567                                super.onKeyUp(keyCode, event);
5568                                return true;
5569                            } else if ((event.getFlags()
5570                                    & KeyEvent.FLAG_EDITOR_ACTION) != 0) {
5571                                // No target for next focus, but make sure the IME
5572                                // if this came from it.
5573                                InputMethodManager imm = InputMethodManager.peekInstance();
5574                                if (imm != null && imm.isActive(this)) {
5575                                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
5576                                }
5577                            }
5578                        }
5579                    }
5580                    return super.onKeyUp(keyCode, event);
5581                }
5582                break;
5583        }
5584
5585        if (mInput != null)
5586            if (mInput.onKeyUp(this, (Editable) mText, keyCode, event))
5587                return true;
5588
5589        if (mMovement != null && mLayout != null)
5590            if (mMovement.onKeyUp(this, (Spannable) mText, keyCode, event))
5591                return true;
5592
5593        return super.onKeyUp(keyCode, event);
5594    }
5595
5596    @Override public boolean onCheckIsTextEditor() {
5597        return mInputType != EditorInfo.TYPE_NULL;
5598    }
5599
5600    @Override public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
5601        if (onCheckIsTextEditor() && isEnabled()) {
5602            if (mInputMethodState == null) {
5603                mInputMethodState = new InputMethodState();
5604            }
5605            outAttrs.inputType = mInputType;
5606            if (mInputContentType != null) {
5607                outAttrs.imeOptions = mInputContentType.imeOptions;
5608                outAttrs.privateImeOptions = mInputContentType.privateImeOptions;
5609                outAttrs.actionLabel = mInputContentType.imeActionLabel;
5610                outAttrs.actionId = mInputContentType.imeActionId;
5611                outAttrs.extras = mInputContentType.extras;
5612            } else {
5613                outAttrs.imeOptions = EditorInfo.IME_NULL;
5614            }
5615            if (focusSearch(FOCUS_DOWN) != null) {
5616                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_NEXT;
5617            }
5618            if (focusSearch(FOCUS_UP) != null) {
5619                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_PREVIOUS;
5620            }
5621            if ((outAttrs.imeOptions&EditorInfo.IME_MASK_ACTION)
5622                    == EditorInfo.IME_ACTION_UNSPECIFIED) {
5623                if ((outAttrs.imeOptions&EditorInfo.IME_FLAG_NAVIGATE_NEXT) != 0) {
5624                    // An action has not been set, but the enter key will move to
5625                    // the next focus, so set the action to that.
5626                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_NEXT;
5627                } else {
5628                    // An action has not been set, and there is no focus to move
5629                    // to, so let's just supply a "done" action.
5630                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_DONE;
5631                }
5632                if (!shouldAdvanceFocusOnEnter()) {
5633                    outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5634                }
5635            }
5636            if (isMultilineInputType(outAttrs.inputType)) {
5637                // Multi-line text editors should always show an enter key.
5638                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5639            }
5640            outAttrs.hintText = mHint;
5641            if (mText instanceof Editable) {
5642                InputConnection ic = new EditableInputConnection(this);
5643                outAttrs.initialSelStart = getSelectionStart();
5644                outAttrs.initialSelEnd = getSelectionEnd();
5645                outAttrs.initialCapsMode = ic.getCursorCapsMode(mInputType);
5646                return ic;
5647            }
5648        }
5649        return null;
5650    }
5651
5652    /**
5653     * If this TextView contains editable content, extract a portion of it
5654     * based on the information in <var>request</var> in to <var>outText</var>.
5655     * @return Returns true if the text was successfully extracted, else false.
5656     */
5657    public boolean extractText(ExtractedTextRequest request,
5658            ExtractedText outText) {
5659        return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN,
5660                EXTRACT_UNKNOWN, outText);
5661    }
5662
5663    static final int EXTRACT_NOTHING = -2;
5664    static final int EXTRACT_UNKNOWN = -1;
5665
5666    boolean extractTextInternal(ExtractedTextRequest request,
5667            int partialStartOffset, int partialEndOffset, int delta,
5668            ExtractedText outText) {
5669        final CharSequence content = mText;
5670        if (content != null) {
5671            if (partialStartOffset != EXTRACT_NOTHING) {
5672                final int N = content.length();
5673                if (partialStartOffset < 0) {
5674                    outText.partialStartOffset = outText.partialEndOffset = -1;
5675                    partialStartOffset = 0;
5676                    partialEndOffset = N;
5677                } else {
5678                    // Now use the delta to determine the actual amount of text
5679                    // we need.
5680                    partialEndOffset += delta;
5681                    // Adjust offsets to ensure we contain full spans.
5682                    if (content instanceof Spanned) {
5683                        Spanned spanned = (Spanned)content;
5684                        Object[] spans = spanned.getSpans(partialStartOffset,
5685                                partialEndOffset, ParcelableSpan.class);
5686                        int i = spans.length;
5687                        while (i > 0) {
5688                            i--;
5689                            int j = spanned.getSpanStart(spans[i]);
5690                            if (j < partialStartOffset) partialStartOffset = j;
5691                            j = spanned.getSpanEnd(spans[i]);
5692                            if (j > partialEndOffset) partialEndOffset = j;
5693                        }
5694                    }
5695                    outText.partialStartOffset = partialStartOffset;
5696                    outText.partialEndOffset = partialEndOffset - delta;
5697
5698                    if (partialStartOffset > N) {
5699                        partialStartOffset = N;
5700                    } else if (partialStartOffset < 0) {
5701                        partialStartOffset = 0;
5702                    }
5703                    if (partialEndOffset > N) {
5704                        partialEndOffset = N;
5705                    } else if (partialEndOffset < 0) {
5706                        partialEndOffset = 0;
5707                    }
5708                }
5709                if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) {
5710                    outText.text = content.subSequence(partialStartOffset,
5711                            partialEndOffset);
5712                } else {
5713                    outText.text = TextUtils.substring(content, partialStartOffset,
5714                            partialEndOffset);
5715                }
5716            } else {
5717                outText.partialStartOffset = 0;
5718                outText.partialEndOffset = 0;
5719                outText.text = "";
5720            }
5721            outText.flags = 0;
5722            if (MetaKeyKeyListener.getMetaState(mText, MetaKeyKeyListener.META_SELECTING) != 0) {
5723                outText.flags |= ExtractedText.FLAG_SELECTING;
5724            }
5725            if (mSingleLine) {
5726                outText.flags |= ExtractedText.FLAG_SINGLE_LINE;
5727            }
5728            outText.startOffset = 0;
5729            outText.selectionStart = getSelectionStart();
5730            outText.selectionEnd = getSelectionEnd();
5731            return true;
5732        }
5733        return false;
5734    }
5735
5736    boolean reportExtractedText() {
5737        final InputMethodState ims = mInputMethodState;
5738        if (ims != null) {
5739            final boolean contentChanged = ims.mContentChanged;
5740            if (contentChanged || ims.mSelectionModeChanged) {
5741                ims.mContentChanged = false;
5742                ims.mSelectionModeChanged = false;
5743                final ExtractedTextRequest req = mInputMethodState.mExtracting;
5744                if (req != null) {
5745                    InputMethodManager imm = InputMethodManager.peekInstance();
5746                    if (imm != null) {
5747                        if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Retrieving extracted start="
5748                                + ims.mChangedStart + " end=" + ims.mChangedEnd
5749                                + " delta=" + ims.mChangedDelta);
5750                        if (ims.mChangedStart < 0 && !contentChanged) {
5751                            ims.mChangedStart = EXTRACT_NOTHING;
5752                        }
5753                        if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd,
5754                                ims.mChangedDelta, ims.mTmpExtracted)) {
5755                            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Reporting extracted start="
5756                                    + ims.mTmpExtracted.partialStartOffset
5757                                    + " end=" + ims.mTmpExtracted.partialEndOffset
5758                                    + ": " + ims.mTmpExtracted.text);
5759                            imm.updateExtractedText(this, req.token,
5760                                    mInputMethodState.mTmpExtracted);
5761                            ims.mChangedStart = EXTRACT_UNKNOWN;
5762                            ims.mChangedEnd = EXTRACT_UNKNOWN;
5763                            ims.mChangedDelta = 0;
5764                            ims.mContentChanged = false;
5765                            return true;
5766                        }
5767                    }
5768                }
5769            }
5770        }
5771        return false;
5772    }
5773
5774    /**
5775     * This is used to remove all style-impacting spans from text before new
5776     * extracted text is being replaced into it, so that we don't have any
5777     * lingering spans applied during the replace.
5778     */
5779    static void removeParcelableSpans(Spannable spannable, int start, int end) {
5780        Object[] spans = spannable.getSpans(start, end, ParcelableSpan.class);
5781        int i = spans.length;
5782        while (i > 0) {
5783            i--;
5784            spannable.removeSpan(spans[i]);
5785        }
5786    }
5787
5788    /**
5789     * Apply to this text view the given extracted text, as previously
5790     * returned by {@link #extractText(ExtractedTextRequest, ExtractedText)}.
5791     */
5792    public void setExtractedText(ExtractedText text) {
5793        Editable content = getEditableText();
5794        if (text.text != null) {
5795            if (content == null) {
5796                setText(text.text, TextView.BufferType.EDITABLE);
5797            } else if (text.partialStartOffset < 0) {
5798                removeParcelableSpans(content, 0, content.length());
5799                content.replace(0, content.length(), text.text);
5800            } else {
5801                final int N = content.length();
5802                int start = text.partialStartOffset;
5803                if (start > N) start = N;
5804                int end = text.partialEndOffset;
5805                if (end > N) end = N;
5806                removeParcelableSpans(content, start, end);
5807                content.replace(start, end, text.text);
5808            }
5809        }
5810
5811        // Now set the selection position...  make sure it is in range, to
5812        // avoid crashes.  If this is a partial update, it is possible that
5813        // the underlying text may have changed, causing us problems here.
5814        // Also we just don't want to trust clients to do the right thing.
5815        Spannable sp = (Spannable)getText();
5816        final int N = sp.length();
5817        int start = text.selectionStart;
5818        if (start < 0) start = 0;
5819        else if (start > N) start = N;
5820        int end = text.selectionEnd;
5821        if (end < 0) end = 0;
5822        else if (end > N) end = N;
5823        Selection.setSelection(sp, start, end);
5824
5825        // Finally, update the selection mode.
5826        if ((text.flags&ExtractedText.FLAG_SELECTING) != 0) {
5827            MetaKeyKeyListener.startSelecting(this, sp);
5828        } else {
5829            MetaKeyKeyListener.stopSelecting(this, sp);
5830        }
5831    }
5832
5833    /**
5834     * @hide
5835     */
5836    public void setExtracting(ExtractedTextRequest req) {
5837        if (mInputMethodState != null) {
5838            mInputMethodState.mExtracting = req;
5839        }
5840        // This would stop a possible selection mode, but no such mode is started in case
5841        // extracted mode will start. Some text is selected though, and will trigger an action mode
5842        // in the extracted view.
5843        hideControllers();
5844    }
5845
5846    /**
5847     * Called by the framework in response to a text completion from
5848     * the current input method, provided by it calling
5849     * {@link InputConnection#commitCompletion
5850     * InputConnection.commitCompletion()}.  The default implementation does
5851     * nothing; text views that are supporting auto-completion should override
5852     * this to do their desired behavior.
5853     *
5854     * @param text The auto complete text the user has selected.
5855     */
5856    public void onCommitCompletion(CompletionInfo text) {
5857        // intentionally empty
5858    }
5859
5860    /**
5861     * Called by the framework in response to a text auto-correction (such as fixing a typo using a
5862     * a dictionnary) from the current input method, provided by it calling
5863     * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default
5864     * implementation flashes the background of the corrected word to provide feedback to the user.
5865     *
5866     * @param info The auto correct info about the text that was corrected.
5867     */
5868    public void onCommitCorrection(CorrectionInfo info) {
5869        if (mCorrectionHighlighter == null) {
5870            mCorrectionHighlighter = new CorrectionHighlighter();
5871        } else {
5872            mCorrectionHighlighter.invalidate(false);
5873        }
5874
5875        mCorrectionHighlighter.highlight(info);
5876    }
5877
5878    private class CorrectionHighlighter {
5879        private final Path mPath = new Path();
5880        private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
5881        private int mStart, mEnd;
5882        private long mFadingStartTime;
5883        private final static int FADE_OUT_DURATION = 400;
5884
5885        public CorrectionHighlighter() {
5886            mPaint.setCompatibilityScaling(getResources().getCompatibilityInfo().applicationScale);
5887            mPaint.setStyle(Paint.Style.FILL);
5888        }
5889
5890        public void highlight(CorrectionInfo info) {
5891            mStart = info.getOffset();
5892            mEnd = mStart + info.getNewText().length();
5893            mFadingStartTime = SystemClock.uptimeMillis();
5894
5895            if (mStart < 0 || mEnd < 0) {
5896                stopAnimation();
5897            }
5898        }
5899
5900        public void draw(Canvas canvas, int cursorOffsetVertical) {
5901            if (updatePath() && updatePaint()) {
5902                if (cursorOffsetVertical != 0) {
5903                    canvas.translate(0, cursorOffsetVertical);
5904                }
5905
5906                canvas.drawPath(mPath, mPaint);
5907
5908                if (cursorOffsetVertical != 0) {
5909                    canvas.translate(0, -cursorOffsetVertical);
5910                }
5911                invalidate(true);
5912            } else {
5913                stopAnimation();
5914                invalidate(false);
5915            }
5916        }
5917
5918        private boolean updatePaint() {
5919            final long duration = SystemClock.uptimeMillis() - mFadingStartTime;
5920            if (duration > FADE_OUT_DURATION) return false;
5921
5922            final float coef = 1.0f - (float) duration / FADE_OUT_DURATION;
5923            final int highlightColorAlpha = Color.alpha(mHighlightColor);
5924            final int color = (mHighlightColor & 0x00FFFFFF) +
5925                    ((int) (highlightColorAlpha * coef) << 24);
5926            mPaint.setColor(color);
5927            return true;
5928        }
5929
5930        private boolean updatePath() {
5931            final Layout layout = TextView.this.mLayout;
5932            if (layout == null) return false;
5933
5934            // Update in case text is edited while the animation is run
5935            final int length = mText.length();
5936            int start = Math.min(length, mStart);
5937            int end = Math.min(length, mEnd);
5938
5939            mPath.reset();
5940            TextView.this.mLayout.getSelectionPath(start, end, mPath);
5941            return true;
5942        }
5943
5944        private void invalidate(boolean delayed) {
5945            if (TextView.this.mLayout == null) return;
5946
5947            synchronized (sTempRect) {
5948                mPath.computeBounds(sTempRect, false);
5949
5950                int left = getCompoundPaddingLeft();
5951                int top = getExtendedPaddingTop() + getVerticalOffset(true);
5952
5953                if (delayed) {
5954                    TextView.this.postInvalidateDelayed(16, // 60 Hz update
5955                            left + (int) sTempRect.left, top + (int) sTempRect.top,
5956                            left + (int) sTempRect.right, top + (int) sTempRect.bottom);
5957                } else {
5958                    TextView.this.postInvalidate((int) sTempRect.left, (int) sTempRect.top,
5959                            (int) sTempRect.right, (int) sTempRect.bottom);
5960                }
5961            }
5962        }
5963
5964        private void stopAnimation() {
5965            TextView.this.mCorrectionHighlighter = null;
5966        }
5967    }
5968
5969    public void beginBatchEdit() {
5970        mInBatchEditControllers = true;
5971        final InputMethodState ims = mInputMethodState;
5972        if (ims != null) {
5973            int nesting = ++ims.mBatchEditNesting;
5974            if (nesting == 1) {
5975                ims.mCursorChanged = false;
5976                ims.mChangedDelta = 0;
5977                if (ims.mContentChanged) {
5978                    // We already have a pending change from somewhere else,
5979                    // so turn this into a full update.
5980                    ims.mChangedStart = 0;
5981                    ims.mChangedEnd = mText.length();
5982                } else {
5983                    ims.mChangedStart = EXTRACT_UNKNOWN;
5984                    ims.mChangedEnd = EXTRACT_UNKNOWN;
5985                    ims.mContentChanged = false;
5986                }
5987                onBeginBatchEdit();
5988            }
5989        }
5990    }
5991
5992    public void endBatchEdit() {
5993        mInBatchEditControllers = false;
5994        final InputMethodState ims = mInputMethodState;
5995        if (ims != null) {
5996            int nesting = --ims.mBatchEditNesting;
5997            if (nesting == 0) {
5998                finishBatchEdit(ims);
5999            }
6000        }
6001    }
6002
6003    void ensureEndedBatchEdit() {
6004        final InputMethodState ims = mInputMethodState;
6005        if (ims != null && ims.mBatchEditNesting != 0) {
6006            ims.mBatchEditNesting = 0;
6007            finishBatchEdit(ims);
6008        }
6009    }
6010
6011    void finishBatchEdit(final InputMethodState ims) {
6012        onEndBatchEdit();
6013
6014        if (ims.mContentChanged || ims.mSelectionModeChanged) {
6015            updateAfterEdit();
6016            reportExtractedText();
6017        } else if (ims.mCursorChanged) {
6018            // Cheezy way to get us to report the current cursor location.
6019            invalidateCursor();
6020        }
6021    }
6022
6023    void updateAfterEdit() {
6024        invalidate();
6025        int curs = getSelectionStart();
6026
6027        if (curs >= 0 || (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6028            registerForPreDraw();
6029        }
6030
6031        if (curs >= 0) {
6032            mHighlightPathBogus = true;
6033            makeBlink();
6034            bringPointIntoView(curs);
6035        }
6036
6037        checkForResize();
6038    }
6039
6040    /**
6041     * Called by the framework in response to a request to begin a batch
6042     * of edit operations through a call to link {@link #beginBatchEdit()}.
6043     */
6044    public void onBeginBatchEdit() {
6045        // intentionally empty
6046    }
6047
6048    /**
6049     * Called by the framework in response to a request to end a batch
6050     * of edit operations through a call to link {@link #endBatchEdit}.
6051     */
6052    public void onEndBatchEdit() {
6053        // intentionally empty
6054    }
6055
6056    /**
6057     * Called by the framework in response to a private command from the
6058     * current method, provided by it calling
6059     * {@link InputConnection#performPrivateCommand
6060     * InputConnection.performPrivateCommand()}.
6061     *
6062     * @param action The action name of the command.
6063     * @param data Any additional data for the command.  This may be null.
6064     * @return Return true if you handled the command, else false.
6065     */
6066    public boolean onPrivateIMECommand(String action, Bundle data) {
6067        return false;
6068    }
6069
6070    private void nullLayouts() {
6071        if (mLayout instanceof BoringLayout && mSavedLayout == null) {
6072            mSavedLayout = (BoringLayout) mLayout;
6073        }
6074        if (mHintLayout instanceof BoringLayout && mSavedHintLayout == null) {
6075            mSavedHintLayout = (BoringLayout) mHintLayout;
6076        }
6077
6078        mSavedMarqueeModeLayout = mLayout = mHintLayout = null;
6079
6080        // Since it depends on the value of mLayout
6081        prepareCursorControllers();
6082    }
6083
6084    /**
6085     * Make a new Layout based on the already-measured size of the view,
6086     * on the assumption that it was measured correctly at some point.
6087     */
6088    private void assumeLayout() {
6089        int width = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6090
6091        if (width < 1) {
6092            width = 0;
6093        }
6094
6095        int physicalWidth = width;
6096
6097        if (mHorizontallyScrolling) {
6098            width = VERY_WIDE;
6099        }
6100
6101        makeNewLayout(width, physicalWidth, UNKNOWN_BORING, UNKNOWN_BORING,
6102                      physicalWidth, false);
6103    }
6104
6105    @Override
6106    protected void resetResolvedLayoutDirection() {
6107        super.resetResolvedLayoutDirection();
6108
6109        if (mLayoutAlignment != null &&
6110                (mTextAlign == TextAlign.VIEW_START ||
6111                mTextAlign == TextAlign.VIEW_END)) {
6112            mLayoutAlignment = null;
6113        }
6114    }
6115
6116    private Layout.Alignment getLayoutAlignment() {
6117        if (mLayoutAlignment == null) {
6118            Layout.Alignment alignment;
6119            TextAlign textAlign = mTextAlign;
6120            switch (textAlign) {
6121                case INHERIT:
6122                    // fall through to gravity temporarily
6123                    // intention is to inherit value through view hierarchy.
6124                case GRAVITY:
6125                    switch (mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) {
6126                        case Gravity.START:
6127                            alignment = Layout.Alignment.ALIGN_NORMAL;
6128                            break;
6129                        case Gravity.END:
6130                            alignment = Layout.Alignment.ALIGN_OPPOSITE;
6131                            break;
6132                        case Gravity.LEFT:
6133                            alignment = Layout.Alignment.ALIGN_LEFT;
6134                            break;
6135                        case Gravity.RIGHT:
6136                            alignment = Layout.Alignment.ALIGN_RIGHT;
6137                            break;
6138                        case Gravity.CENTER_HORIZONTAL:
6139                            alignment = Layout.Alignment.ALIGN_CENTER;
6140                            break;
6141                        default:
6142                            alignment = Layout.Alignment.ALIGN_NORMAL;
6143                            break;
6144                    }
6145                    break;
6146                case TEXT_START:
6147                    alignment = Layout.Alignment.ALIGN_NORMAL;
6148                    break;
6149                case TEXT_END:
6150                    alignment = Layout.Alignment.ALIGN_OPPOSITE;
6151                    break;
6152                case CENTER:
6153                    alignment = Layout.Alignment.ALIGN_CENTER;
6154                    break;
6155                case VIEW_START:
6156                    alignment = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
6157                            Layout.Alignment.ALIGN_RIGHT : Layout.Alignment.ALIGN_LEFT;
6158                    break;
6159                case VIEW_END:
6160                    alignment = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
6161                            Layout.Alignment.ALIGN_LEFT : Layout.Alignment.ALIGN_RIGHT;
6162                    break;
6163                default:
6164                    alignment = Layout.Alignment.ALIGN_NORMAL;
6165                    break;
6166            }
6167            mLayoutAlignment = alignment;
6168        }
6169        return mLayoutAlignment;
6170    }
6171
6172    /**
6173     * The width passed in is now the desired layout width,
6174     * not the full view width with padding.
6175     * {@hide}
6176     */
6177    protected void makeNewLayout(int wantWidth, int hintWidth,
6178                                 BoringLayout.Metrics boring,
6179                                 BoringLayout.Metrics hintBoring,
6180                                 int ellipsisWidth, boolean bringIntoView) {
6181        stopMarquee();
6182
6183        // Update "old" cached values
6184        mOldMaximum = mMaximum;
6185        mOldMaxMode = mMaxMode;
6186
6187        mHighlightPathBogus = true;
6188
6189        if (wantWidth < 0) {
6190            wantWidth = 0;
6191        }
6192        if (hintWidth < 0) {
6193            hintWidth = 0;
6194        }
6195
6196        Layout.Alignment alignment = getLayoutAlignment();
6197        boolean shouldEllipsize = mEllipsize != null && mInput == null;
6198        final boolean switchEllipsize = mEllipsize == TruncateAt.MARQUEE &&
6199                mMarqueeFadeMode != MARQUEE_FADE_NORMAL;
6200        TruncateAt effectiveEllipsize = mEllipsize;
6201        if (mEllipsize == TruncateAt.MARQUEE &&
6202                mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
6203            effectiveEllipsize = TruncateAt.END_SMALL;
6204        }
6205
6206        if (mTextDir == null) {
6207            resolveTextDirection();
6208        }
6209
6210        mLayout = makeSingleLayout(wantWidth, boring, ellipsisWidth, alignment, shouldEllipsize,
6211                effectiveEllipsize, effectiveEllipsize == mEllipsize);
6212        if (switchEllipsize) {
6213            TruncateAt oppositeEllipsize = effectiveEllipsize == TruncateAt.MARQUEE ?
6214                    TruncateAt.END : TruncateAt.MARQUEE;
6215            mSavedMarqueeModeLayout = makeSingleLayout(wantWidth, boring, ellipsisWidth, alignment,
6216                    shouldEllipsize, oppositeEllipsize, effectiveEllipsize != mEllipsize);
6217        }
6218
6219        shouldEllipsize = mEllipsize != null;
6220        mHintLayout = null;
6221
6222        if (mHint != null) {
6223            if (shouldEllipsize) hintWidth = wantWidth;
6224
6225            if (hintBoring == UNKNOWN_BORING) {
6226                hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mTextDir,
6227                                                   mHintBoring);
6228                if (hintBoring != null) {
6229                    mHintBoring = hintBoring;
6230                }
6231            }
6232
6233            if (hintBoring != null) {
6234                if (hintBoring.width <= hintWidth &&
6235                    (!shouldEllipsize || hintBoring.width <= ellipsisWidth)) {
6236                    if (mSavedHintLayout != null) {
6237                        mHintLayout = mSavedHintLayout.
6238                                replaceOrMake(mHint, mTextPaint,
6239                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6240                                hintBoring, mIncludePad);
6241                    } else {
6242                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6243                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6244                                hintBoring, mIncludePad);
6245                    }
6246
6247                    mSavedHintLayout = (BoringLayout) mHintLayout;
6248                } else if (shouldEllipsize && hintBoring.width <= hintWidth) {
6249                    if (mSavedHintLayout != null) {
6250                        mHintLayout = mSavedHintLayout.
6251                                replaceOrMake(mHint, mTextPaint,
6252                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6253                                hintBoring, mIncludePad, mEllipsize,
6254                                ellipsisWidth);
6255                    } else {
6256                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6257                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6258                                hintBoring, mIncludePad, mEllipsize,
6259                                ellipsisWidth);
6260                    }
6261                } else if (shouldEllipsize) {
6262                    mHintLayout = new StaticLayout(mHint,
6263                                0, mHint.length(),
6264                                mTextPaint, hintWidth, alignment, mTextDir, mSpacingMult,
6265                                mSpacingAdd, mIncludePad, mEllipsize,
6266                                ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6267                } else {
6268                    mHintLayout = new StaticLayout(mHint, mTextPaint,
6269                            hintWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6270                            mIncludePad);
6271                }
6272            } else if (shouldEllipsize) {
6273                mHintLayout = new StaticLayout(mHint,
6274                            0, mHint.length(),
6275                            mTextPaint, hintWidth, alignment, mTextDir, mSpacingMult,
6276                            mSpacingAdd, mIncludePad, mEllipsize,
6277                            ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6278            } else {
6279                mHintLayout = new StaticLayout(mHint, mTextPaint,
6280                        hintWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6281                        mIncludePad);
6282            }
6283        }
6284
6285        if (bringIntoView) {
6286            registerForPreDraw();
6287        }
6288
6289        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6290            if (!compressText(ellipsisWidth)) {
6291                final int height = mLayoutParams.height;
6292                // If the size of the view does not depend on the size of the text, try to
6293                // start the marquee immediately
6294                if (height != LayoutParams.WRAP_CONTENT && height != LayoutParams.MATCH_PARENT) {
6295                    startMarquee();
6296                } else {
6297                    // Defer the start of the marquee until we know our width (see setFrame())
6298                    mRestartMarquee = true;
6299                }
6300            }
6301        }
6302
6303        // CursorControllers need a non-null mLayout
6304        prepareCursorControllers();
6305    }
6306
6307    private Layout makeSingleLayout(int wantWidth, BoringLayout.Metrics boring, int ellipsisWidth,
6308            Layout.Alignment alignment, boolean shouldEllipsize, TruncateAt effectiveEllipsize,
6309            boolean useSaved) {
6310        Layout result = null;
6311        if (mText instanceof Spannable) {
6312            result = new DynamicLayout(mText, mTransformed, mTextPaint, wantWidth,
6313                    alignment, mTextDir, mSpacingMult,
6314                    mSpacingAdd, mIncludePad, mInput == null ? effectiveEllipsize : null,
6315                            ellipsisWidth);
6316        } else {
6317            if (boring == UNKNOWN_BORING) {
6318                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
6319                if (boring != null) {
6320                    mBoring = boring;
6321                }
6322            }
6323
6324            if (boring != null) {
6325                if (boring.width <= wantWidth &&
6326                        (effectiveEllipsize == null || boring.width <= ellipsisWidth)) {
6327                    if (useSaved && mSavedLayout != null) {
6328                        result = mSavedLayout.replaceOrMake(mTransformed, mTextPaint,
6329                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6330                                boring, mIncludePad);
6331                    } else {
6332                        result = BoringLayout.make(mTransformed, mTextPaint,
6333                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6334                                boring, mIncludePad);
6335                    }
6336
6337                    if (useSaved) {
6338                        mSavedLayout = (BoringLayout) result;
6339                    }
6340                } else if (shouldEllipsize && boring.width <= wantWidth) {
6341                    if (useSaved && mSavedLayout != null) {
6342                        result = mSavedLayout.replaceOrMake(mTransformed, mTextPaint,
6343                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6344                                boring, mIncludePad, effectiveEllipsize,
6345                                ellipsisWidth);
6346                    } else {
6347                        result = BoringLayout.make(mTransformed, mTextPaint,
6348                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6349                                boring, mIncludePad, effectiveEllipsize,
6350                                ellipsisWidth);
6351                    }
6352                } else if (shouldEllipsize) {
6353                    result = new StaticLayout(mTransformed,
6354                            0, mTransformed.length(),
6355                            mTextPaint, wantWidth, alignment, mTextDir, mSpacingMult,
6356                            mSpacingAdd, mIncludePad, effectiveEllipsize,
6357                            ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6358                } else {
6359                    result = new StaticLayout(mTransformed, mTextPaint,
6360                            wantWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6361                            mIncludePad);
6362                }
6363            } else if (shouldEllipsize) {
6364                result = new StaticLayout(mTransformed,
6365                        0, mTransformed.length(),
6366                        mTextPaint, wantWidth, alignment, mTextDir, mSpacingMult,
6367                        mSpacingAdd, mIncludePad, effectiveEllipsize,
6368                        ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6369            } else {
6370                result = new StaticLayout(mTransformed, mTextPaint,
6371                        wantWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6372                        mIncludePad);
6373            }
6374        }
6375        return result;
6376    }
6377
6378    private boolean compressText(float width) {
6379        if (isHardwareAccelerated()) return false;
6380
6381        // Only compress the text if it hasn't been compressed by the previous pass
6382        if (width > 0.0f && mLayout != null && getLineCount() == 1 && !mUserSetTextScaleX &&
6383                mTextPaint.getTextScaleX() == 1.0f) {
6384            final float textWidth = mLayout.getLineWidth(0);
6385            final float overflow = (textWidth + 1.0f - width) / width;
6386            if (overflow > 0.0f && overflow <= Marquee.MARQUEE_DELTA_MAX) {
6387                mTextPaint.setTextScaleX(1.0f - overflow - 0.005f);
6388                post(new Runnable() {
6389                    public void run() {
6390                        requestLayout();
6391                    }
6392                });
6393                return true;
6394            }
6395        }
6396
6397        return false;
6398    }
6399
6400    private static int desired(Layout layout) {
6401        int n = layout.getLineCount();
6402        CharSequence text = layout.getText();
6403        float max = 0;
6404
6405        // if any line was wrapped, we can't use it.
6406        // but it's ok for the last line not to have a newline
6407
6408        for (int i = 0; i < n - 1; i++) {
6409            if (text.charAt(layout.getLineEnd(i) - 1) != '\n')
6410                return -1;
6411        }
6412
6413        for (int i = 0; i < n; i++) {
6414            max = Math.max(max, layout.getLineWidth(i));
6415        }
6416
6417        return (int) FloatMath.ceil(max);
6418    }
6419
6420    /**
6421     * Set whether the TextView includes extra top and bottom padding to make
6422     * room for accents that go above the normal ascent and descent.
6423     * The default is true.
6424     *
6425     * @attr ref android.R.styleable#TextView_includeFontPadding
6426     */
6427    public void setIncludeFontPadding(boolean includepad) {
6428        if (mIncludePad != includepad) {
6429            mIncludePad = includepad;
6430
6431            if (mLayout != null) {
6432                nullLayouts();
6433                requestLayout();
6434                invalidate();
6435            }
6436        }
6437    }
6438
6439    private static final BoringLayout.Metrics UNKNOWN_BORING = new BoringLayout.Metrics();
6440
6441    @Override
6442    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
6443        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
6444        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
6445        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
6446        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
6447
6448        int width;
6449        int height;
6450
6451        BoringLayout.Metrics boring = UNKNOWN_BORING;
6452        BoringLayout.Metrics hintBoring = UNKNOWN_BORING;
6453
6454        if (mTextDir == null) {
6455            resolveTextDirection();
6456        }
6457
6458        int des = -1;
6459        boolean fromexisting = false;
6460
6461        if (widthMode == MeasureSpec.EXACTLY) {
6462            // Parent has told us how big to be. So be it.
6463            width = widthSize;
6464        } else {
6465            if (mLayout != null && mEllipsize == null) {
6466                des = desired(mLayout);
6467            }
6468
6469            if (des < 0) {
6470                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
6471                if (boring != null) {
6472                    mBoring = boring;
6473                }
6474            } else {
6475                fromexisting = true;
6476            }
6477
6478            if (boring == null || boring == UNKNOWN_BORING) {
6479                if (des < 0) {
6480                    des = (int) FloatMath.ceil(Layout.getDesiredWidth(mTransformed, mTextPaint));
6481                }
6482
6483                width = des;
6484            } else {
6485                width = boring.width;
6486            }
6487
6488            final Drawables dr = mDrawables;
6489            if (dr != null) {
6490                width = Math.max(width, dr.mDrawableWidthTop);
6491                width = Math.max(width, dr.mDrawableWidthBottom);
6492            }
6493
6494            if (mHint != null) {
6495                int hintDes = -1;
6496                int hintWidth;
6497
6498                if (mHintLayout != null && mEllipsize == null) {
6499                    hintDes = desired(mHintLayout);
6500                }
6501
6502                if (hintDes < 0) {
6503                    hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mHintBoring);
6504                    if (hintBoring != null) {
6505                        mHintBoring = hintBoring;
6506                    }
6507                }
6508
6509                if (hintBoring == null || hintBoring == UNKNOWN_BORING) {
6510                    if (hintDes < 0) {
6511                        hintDes = (int) FloatMath.ceil(
6512                                Layout.getDesiredWidth(mHint, mTextPaint));
6513                    }
6514
6515                    hintWidth = hintDes;
6516                } else {
6517                    hintWidth = hintBoring.width;
6518                }
6519
6520                if (hintWidth > width) {
6521                    width = hintWidth;
6522                }
6523            }
6524
6525            width += getCompoundPaddingLeft() + getCompoundPaddingRight();
6526
6527            if (mMaxWidthMode == EMS) {
6528                width = Math.min(width, mMaxWidth * getLineHeight());
6529            } else {
6530                width = Math.min(width, mMaxWidth);
6531            }
6532
6533            if (mMinWidthMode == EMS) {
6534                width = Math.max(width, mMinWidth * getLineHeight());
6535            } else {
6536                width = Math.max(width, mMinWidth);
6537            }
6538
6539            // Check against our minimum width
6540            width = Math.max(width, getSuggestedMinimumWidth());
6541
6542            if (widthMode == MeasureSpec.AT_MOST) {
6543                width = Math.min(widthSize, width);
6544            }
6545        }
6546
6547        int want = width - getCompoundPaddingLeft() - getCompoundPaddingRight();
6548        int unpaddedWidth = want;
6549
6550        if (mHorizontallyScrolling) want = VERY_WIDE;
6551
6552        int hintWant = want;
6553        int hintWidth = (mHintLayout == null) ? hintWant : mHintLayout.getWidth();
6554
6555        if (mLayout == null) {
6556            makeNewLayout(want, hintWant, boring, hintBoring,
6557                          width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6558        } else {
6559            final boolean layoutChanged = (mLayout.getWidth() != want) ||
6560                    (hintWidth != hintWant) ||
6561                    (mLayout.getEllipsizedWidth() !=
6562                            width - getCompoundPaddingLeft() - getCompoundPaddingRight());
6563
6564            final boolean widthChanged = (mHint == null) &&
6565                    (mEllipsize == null) &&
6566                    (want > mLayout.getWidth()) &&
6567                    (mLayout instanceof BoringLayout || (fromexisting && des >= 0 && des <= want));
6568
6569            final boolean maximumChanged = (mMaxMode != mOldMaxMode) || (mMaximum != mOldMaximum);
6570
6571            if (layoutChanged || maximumChanged) {
6572                if (!maximumChanged && widthChanged) {
6573                    mLayout.increaseWidthTo(want);
6574                } else {
6575                    makeNewLayout(want, hintWant, boring, hintBoring,
6576                            width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6577                }
6578            } else {
6579                // Nothing has changed
6580            }
6581        }
6582
6583        if (heightMode == MeasureSpec.EXACTLY) {
6584            // Parent has told us how big to be. So be it.
6585            height = heightSize;
6586            mDesiredHeightAtMeasure = -1;
6587        } else {
6588            int desired = getDesiredHeight();
6589
6590            height = desired;
6591            mDesiredHeightAtMeasure = desired;
6592
6593            if (heightMode == MeasureSpec.AT_MOST) {
6594                height = Math.min(desired, heightSize);
6595            }
6596        }
6597
6598        int unpaddedHeight = height - getCompoundPaddingTop() - getCompoundPaddingBottom();
6599        if (mMaxMode == LINES && mLayout.getLineCount() > mMaximum) {
6600            unpaddedHeight = Math.min(unpaddedHeight, mLayout.getLineTop(mMaximum));
6601        }
6602
6603        /*
6604         * We didn't let makeNewLayout() register to bring the cursor into view,
6605         * so do it here if there is any possibility that it is needed.
6606         */
6607        if (mMovement != null ||
6608            mLayout.getWidth() > unpaddedWidth ||
6609            mLayout.getHeight() > unpaddedHeight) {
6610            registerForPreDraw();
6611        } else {
6612            scrollTo(0, 0);
6613        }
6614
6615        setMeasuredDimension(width, height);
6616    }
6617
6618    private int getDesiredHeight() {
6619        return Math.max(
6620                getDesiredHeight(mLayout, true),
6621                getDesiredHeight(mHintLayout, mEllipsize != null));
6622    }
6623
6624    private int getDesiredHeight(Layout layout, boolean cap) {
6625        if (layout == null) {
6626            return 0;
6627        }
6628
6629        int linecount = layout.getLineCount();
6630        int pad = getCompoundPaddingTop() + getCompoundPaddingBottom();
6631        int desired = layout.getLineTop(linecount);
6632
6633        final Drawables dr = mDrawables;
6634        if (dr != null) {
6635            desired = Math.max(desired, dr.mDrawableHeightLeft);
6636            desired = Math.max(desired, dr.mDrawableHeightRight);
6637        }
6638
6639        desired += pad;
6640
6641        if (mMaxMode == LINES) {
6642            /*
6643             * Don't cap the hint to a certain number of lines.
6644             * (Do cap it, though, if we have a maximum pixel height.)
6645             */
6646            if (cap) {
6647                if (linecount > mMaximum) {
6648                    desired = layout.getLineTop(mMaximum);
6649
6650                    if (dr != null) {
6651                        desired = Math.max(desired, dr.mDrawableHeightLeft);
6652                        desired = Math.max(desired, dr.mDrawableHeightRight);
6653                    }
6654
6655                    desired += pad;
6656                    linecount = mMaximum;
6657                }
6658            }
6659        } else {
6660            desired = Math.min(desired, mMaximum);
6661        }
6662
6663        if (mMinMode == LINES) {
6664            if (linecount < mMinimum) {
6665                desired += getLineHeight() * (mMinimum - linecount);
6666            }
6667        } else {
6668            desired = Math.max(desired, mMinimum);
6669        }
6670
6671        // Check against our minimum height
6672        desired = Math.max(desired, getSuggestedMinimumHeight());
6673
6674        return desired;
6675    }
6676
6677    /**
6678     * Check whether a change to the existing text layout requires a
6679     * new view layout.
6680     */
6681    private void checkForResize() {
6682        boolean sizeChanged = false;
6683
6684        if (mLayout != null) {
6685            // Check if our width changed
6686            if (mLayoutParams.width == LayoutParams.WRAP_CONTENT) {
6687                sizeChanged = true;
6688                invalidate();
6689            }
6690
6691            // Check if our height changed
6692            if (mLayoutParams.height == LayoutParams.WRAP_CONTENT) {
6693                int desiredHeight = getDesiredHeight();
6694
6695                if (desiredHeight != this.getHeight()) {
6696                    sizeChanged = true;
6697                }
6698            } else if (mLayoutParams.height == LayoutParams.MATCH_PARENT) {
6699                if (mDesiredHeightAtMeasure >= 0) {
6700                    int desiredHeight = getDesiredHeight();
6701
6702                    if (desiredHeight != mDesiredHeightAtMeasure) {
6703                        sizeChanged = true;
6704                    }
6705                }
6706            }
6707        }
6708
6709        if (sizeChanged) {
6710            requestLayout();
6711            // caller will have already invalidated
6712        }
6713    }
6714
6715    /**
6716     * Check whether entirely new text requires a new view layout
6717     * or merely a new text layout.
6718     */
6719    private void checkForRelayout() {
6720        // If we have a fixed width, we can just swap in a new text layout
6721        // if the text height stays the same or if the view height is fixed.
6722
6723        if ((mLayoutParams.width != LayoutParams.WRAP_CONTENT ||
6724                (mMaxWidthMode == mMinWidthMode && mMaxWidth == mMinWidth)) &&
6725                (mHint == null || mHintLayout != null) &&
6726                (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight() > 0)) {
6727            // Static width, so try making a new text layout.
6728
6729            int oldht = mLayout.getHeight();
6730            int want = mLayout.getWidth();
6731            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
6732
6733            /*
6734             * No need to bring the text into view, since the size is not
6735             * changing (unless we do the requestLayout(), in which case it
6736             * will happen at measure).
6737             */
6738            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
6739                          mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight(),
6740                          false);
6741
6742            if (mEllipsize != TextUtils.TruncateAt.MARQUEE) {
6743                // In a fixed-height view, so use our new text layout.
6744                if (mLayoutParams.height != LayoutParams.WRAP_CONTENT &&
6745                    mLayoutParams.height != LayoutParams.MATCH_PARENT) {
6746                    invalidate();
6747                    return;
6748                }
6749
6750                // Dynamic height, but height has stayed the same,
6751                // so use our new text layout.
6752                if (mLayout.getHeight() == oldht &&
6753                    (mHintLayout == null || mHintLayout.getHeight() == oldht)) {
6754                    invalidate();
6755                    return;
6756                }
6757            }
6758
6759            // We lose: the height has changed and we have a dynamic height.
6760            // Request a new view layout using our new text layout.
6761            requestLayout();
6762            invalidate();
6763        } else {
6764            // Dynamic width, so we have no choice but to request a new
6765            // view layout with a new text layout.
6766            nullLayouts();
6767            requestLayout();
6768            invalidate();
6769        }
6770    }
6771
6772    /**
6773     * Returns true if anything changed.
6774     */
6775    private boolean bringTextIntoView() {
6776        int line = 0;
6777        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6778            line = mLayout.getLineCount() - 1;
6779        }
6780
6781        Layout.Alignment a = mLayout.getParagraphAlignment(line);
6782        int dir = mLayout.getParagraphDirection(line);
6783        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6784        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6785        int ht = mLayout.getHeight();
6786
6787        int scrollx, scrolly;
6788
6789        // Convert to left, center, or right alignment.
6790        if (a == Layout.Alignment.ALIGN_NORMAL) {
6791            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_LEFT :
6792                Layout.Alignment.ALIGN_RIGHT;
6793        } else if (a == Layout.Alignment.ALIGN_OPPOSITE){
6794            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_RIGHT :
6795                Layout.Alignment.ALIGN_LEFT;
6796        }
6797
6798        if (a == Layout.Alignment.ALIGN_CENTER) {
6799            /*
6800             * Keep centered if possible, or, if it is too wide to fit,
6801             * keep leading edge in view.
6802             */
6803
6804            int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6805            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6806
6807            if (right - left < hspace) {
6808                scrollx = (right + left) / 2 - hspace / 2;
6809            } else {
6810                if (dir < 0) {
6811                    scrollx = right - hspace;
6812                } else {
6813                    scrollx = left;
6814                }
6815            }
6816        } else if (a == Layout.Alignment.ALIGN_RIGHT) {
6817            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6818            scrollx = right - hspace;
6819        } else { // a == Layout.Alignment.ALIGN_LEFT (will also be the default)
6820            scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
6821        }
6822
6823        if (ht < vspace) {
6824            scrolly = 0;
6825        } else {
6826            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6827                scrolly = ht - vspace;
6828            } else {
6829                scrolly = 0;
6830            }
6831        }
6832
6833        if (scrollx != mScrollX || scrolly != mScrollY) {
6834            scrollTo(scrollx, scrolly);
6835            return true;
6836        } else {
6837            return false;
6838        }
6839    }
6840
6841    /**
6842     * Move the point, specified by the offset, into the view if it is needed.
6843     * This has to be called after layout. Returns true if anything changed.
6844     */
6845    public boolean bringPointIntoView(int offset) {
6846        boolean changed = false;
6847
6848        if (mLayout == null) return changed;
6849
6850        int line = mLayout.getLineForOffset(offset);
6851
6852        // FIXME: Is it okay to truncate this, or should we round?
6853        final int x = (int)mLayout.getPrimaryHorizontal(offset);
6854        final int top = mLayout.getLineTop(line);
6855        final int bottom = mLayout.getLineTop(line + 1);
6856
6857        int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6858        int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6859        int ht = mLayout.getHeight();
6860
6861        int grav;
6862
6863        switch (mLayout.getParagraphAlignment(line)) {
6864            case ALIGN_LEFT:
6865                grav = 1;
6866                break;
6867            case ALIGN_RIGHT:
6868                grav = -1;
6869                break;
6870            case ALIGN_NORMAL:
6871                grav = mLayout.getParagraphDirection(line);
6872                break;
6873            case ALIGN_OPPOSITE:
6874                grav = -mLayout.getParagraphDirection(line);
6875                break;
6876            case ALIGN_CENTER:
6877            default:
6878                grav = 0;
6879                break;
6880        }
6881
6882        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6883        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6884
6885        int hslack = (bottom - top) / 2;
6886        int vslack = hslack;
6887
6888        if (vslack > vspace / 4)
6889            vslack = vspace / 4;
6890        if (hslack > hspace / 4)
6891            hslack = hspace / 4;
6892
6893        int hs = mScrollX;
6894        int vs = mScrollY;
6895
6896        if (top - vs < vslack)
6897            vs = top - vslack;
6898        if (bottom - vs > vspace - vslack)
6899            vs = bottom - (vspace - vslack);
6900        if (ht - vs < vspace)
6901            vs = ht - vspace;
6902        if (0 - vs > 0)
6903            vs = 0;
6904
6905        if (grav != 0) {
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        if (grav < 0) {
6915            if (left - hs > 0)
6916                hs = left;
6917            if (right - hs < hspace)
6918                hs = right - hspace;
6919        } else if (grav > 0) {
6920            if (right - hs < hspace)
6921                hs = right - hspace;
6922            if (left - hs > 0)
6923                hs = left;
6924        } else /* grav == 0 */ {
6925            if (right - left <= hspace) {
6926                /*
6927                 * If the entire text fits, center it exactly.
6928                 */
6929                hs = left - (hspace - (right - left)) / 2;
6930            } else if (x > right - hslack) {
6931                /*
6932                 * If we are near the right edge, keep the right edge
6933                 * at the edge of the view.
6934                 */
6935                hs = right - hspace;
6936            } else if (x < left + hslack) {
6937                /*
6938                 * If we are near the left edge, keep the left edge
6939                 * at the edge of the view.
6940                 */
6941                hs = left;
6942            } else if (left > hs) {
6943                /*
6944                 * Is there whitespace visible at the left?  Fix it if so.
6945                 */
6946                hs = left;
6947            } else if (right < hs + hspace) {
6948                /*
6949                 * Is there whitespace visible at the right?  Fix it if so.
6950                 */
6951                hs = right - hspace;
6952            } else {
6953                /*
6954                 * Otherwise, float as needed.
6955                 */
6956                if (x - hs < hslack) {
6957                    hs = x - hslack;
6958                }
6959                if (x - hs > hspace - hslack) {
6960                    hs = x - (hspace - hslack);
6961                }
6962            }
6963        }
6964
6965        if (hs != mScrollX || vs != mScrollY) {
6966            if (mScroller == null) {
6967                scrollTo(hs, vs);
6968            } else {
6969                long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll;
6970                int dx = hs - mScrollX;
6971                int dy = vs - mScrollY;
6972
6973                if (duration > ANIMATED_SCROLL_GAP) {
6974                    mScroller.startScroll(mScrollX, mScrollY, dx, dy);
6975                    awakenScrollBars(mScroller.getDuration());
6976                    invalidate();
6977                } else {
6978                    if (!mScroller.isFinished()) {
6979                        mScroller.abortAnimation();
6980                    }
6981
6982                    scrollBy(dx, dy);
6983                }
6984
6985                mLastScroll = AnimationUtils.currentAnimationTimeMillis();
6986            }
6987
6988            changed = true;
6989        }
6990
6991        if (isFocused()) {
6992            // This offsets because getInterestingRect() is in terms of viewport coordinates, but
6993            // requestRectangleOnScreen() is in terms of content coordinates.
6994
6995            if (mTempRect == null) mTempRect = new Rect();
6996            // The offsets here are to ensure the rectangle we are using is
6997            // within our view bounds, in case the cursor is on the far left
6998            // or right.  If it isn't withing the bounds, then this request
6999            // will be ignored.
7000            mTempRect.set(x - 2, top, x + 2, bottom);
7001            getInterestingRect(mTempRect, line);
7002            mTempRect.offset(mScrollX, mScrollY);
7003
7004            if (requestRectangleOnScreen(mTempRect)) {
7005                changed = true;
7006            }
7007        }
7008
7009        return changed;
7010    }
7011
7012    /**
7013     * Move the cursor, if needed, so that it is at an offset that is visible
7014     * to the user.  This will not move the cursor if it represents more than
7015     * one character (a selection range).  This will only work if the
7016     * TextView contains spannable text; otherwise it will do nothing.
7017     *
7018     * @return True if the cursor was actually moved, false otherwise.
7019     */
7020    public boolean moveCursorToVisibleOffset() {
7021        if (!(mText instanceof Spannable)) {
7022            return false;
7023        }
7024        int start = getSelectionStart();
7025        int end = getSelectionEnd();
7026        if (start != end) {
7027            return false;
7028        }
7029
7030        // First: make sure the line is visible on screen:
7031
7032        int line = mLayout.getLineForOffset(start);
7033
7034        final int top = mLayout.getLineTop(line);
7035        final int bottom = mLayout.getLineTop(line + 1);
7036        final int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
7037        int vslack = (bottom - top) / 2;
7038        if (vslack > vspace / 4)
7039            vslack = vspace / 4;
7040        final int vs = mScrollY;
7041
7042        if (top < (vs+vslack)) {
7043            line = mLayout.getLineForVertical(vs+vslack+(bottom-top));
7044        } else if (bottom > (vspace+vs-vslack)) {
7045            line = mLayout.getLineForVertical(vspace+vs-vslack-(bottom-top));
7046        }
7047
7048        // Next: make sure the character is visible on screen:
7049
7050        final int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
7051        final int hs = mScrollX;
7052        final int leftChar = mLayout.getOffsetForHorizontal(line, hs);
7053        final int rightChar = mLayout.getOffsetForHorizontal(line, hspace+hs);
7054
7055        // line might contain bidirectional text
7056        final int lowChar = leftChar < rightChar ? leftChar : rightChar;
7057        final int highChar = leftChar > rightChar ? leftChar : rightChar;
7058
7059        int newStart = start;
7060        if (newStart < lowChar) {
7061            newStart = lowChar;
7062        } else if (newStart > highChar) {
7063            newStart = highChar;
7064        }
7065
7066        if (newStart != start) {
7067            Selection.setSelection((Spannable)mText, newStart);
7068            return true;
7069        }
7070
7071        return false;
7072    }
7073
7074    @Override
7075    public void computeScroll() {
7076        if (mScroller != null) {
7077            if (mScroller.computeScrollOffset()) {
7078                mScrollX = mScroller.getCurrX();
7079                mScrollY = mScroller.getCurrY();
7080                invalidateParentCaches();
7081                postInvalidate();  // So we draw again
7082            }
7083        }
7084    }
7085
7086    private void getInterestingRect(Rect r, int line) {
7087        convertFromViewportToContentCoordinates(r);
7088
7089        // Rectangle can can be expanded on first and last line to take
7090        // padding into account.
7091        // TODO Take left/right padding into account too?
7092        if (line == 0) r.top -= getExtendedPaddingTop();
7093        if (line == mLayout.getLineCount() - 1) r.bottom += getExtendedPaddingBottom();
7094    }
7095
7096    private void convertFromViewportToContentCoordinates(Rect r) {
7097        final int horizontalOffset = viewportToContentHorizontalOffset();
7098        r.left += horizontalOffset;
7099        r.right += horizontalOffset;
7100
7101        final int verticalOffset = viewportToContentVerticalOffset();
7102        r.top += verticalOffset;
7103        r.bottom += verticalOffset;
7104    }
7105
7106    private int viewportToContentHorizontalOffset() {
7107        return getCompoundPaddingLeft() - mScrollX;
7108    }
7109
7110    private int viewportToContentVerticalOffset() {
7111        int offset = getExtendedPaddingTop() - mScrollY;
7112        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
7113            offset += getVerticalOffset(false);
7114        }
7115        return offset;
7116    }
7117
7118    @Override
7119    public void debug(int depth) {
7120        super.debug(depth);
7121
7122        String output = debugIndent(depth);
7123        output += "frame={" + mLeft + ", " + mTop + ", " + mRight
7124                + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY
7125                + "} ";
7126
7127        if (mText != null) {
7128
7129            output += "mText=\"" + mText + "\" ";
7130            if (mLayout != null) {
7131                output += "mLayout width=" + mLayout.getWidth()
7132                        + " height=" + mLayout.getHeight();
7133            }
7134        } else {
7135            output += "mText=NULL";
7136        }
7137        Log.d(VIEW_LOG_TAG, output);
7138    }
7139
7140    /**
7141     * Convenience for {@link Selection#getSelectionStart}.
7142     */
7143    @ViewDebug.ExportedProperty(category = "text")
7144    public int getSelectionStart() {
7145        return Selection.getSelectionStart(getText());
7146    }
7147
7148    /**
7149     * Convenience for {@link Selection#getSelectionEnd}.
7150     */
7151    @ViewDebug.ExportedProperty(category = "text")
7152    public int getSelectionEnd() {
7153        return Selection.getSelectionEnd(getText());
7154    }
7155
7156    /**
7157     * Return true iff there is a selection inside this text view.
7158     */
7159    public boolean hasSelection() {
7160        final int selectionStart = getSelectionStart();
7161        final int selectionEnd = getSelectionEnd();
7162
7163        return selectionStart >= 0 && selectionStart != selectionEnd;
7164    }
7165
7166    /**
7167     * Sets the properties of this field (lines, horizontally scrolling,
7168     * transformation method) to be for a single-line input.
7169     *
7170     * @attr ref android.R.styleable#TextView_singleLine
7171     */
7172    public void setSingleLine() {
7173        setSingleLine(true);
7174    }
7175
7176    /**
7177     * Sets the properties of this field to transform input to ALL CAPS
7178     * display. This may use a "small caps" formatting if available.
7179     * This setting will be ignored if this field is editable or selectable.
7180     *
7181     * This call replaces the current transformation method. Disabling this
7182     * will not necessarily restore the previous behavior from before this
7183     * was enabled.
7184     *
7185     * @see #setTransformationMethod(TransformationMethod)
7186     * @attr ref android.R.styleable#TextView_textAllCaps
7187     */
7188    public void setAllCaps(boolean allCaps) {
7189        if (allCaps) {
7190            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
7191        } else {
7192            setTransformationMethod(null);
7193        }
7194    }
7195
7196    /**
7197     * If true, sets the properties of this field (number of lines, horizontally scrolling,
7198     * transformation method) to be for a single-line input; if false, restores these to the default
7199     * conditions.
7200     *
7201     * Note that the default conditions are not necessarily those that were in effect prior this
7202     * method, and you may want to reset these properties to your custom values.
7203     *
7204     * @attr ref android.R.styleable#TextView_singleLine
7205     */
7206    @android.view.RemotableViewMethod
7207    public void setSingleLine(boolean singleLine) {
7208        // Could be used, but may break backward compatibility.
7209        // if (mSingleLine == singleLine) return;
7210        setInputTypeSingleLine(singleLine);
7211        applySingleLine(singleLine, true, true);
7212    }
7213
7214    /**
7215     * Adds or remove the EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE on the mInputType.
7216     * @param singleLine
7217     */
7218    private void setInputTypeSingleLine(boolean singleLine) {
7219        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
7220            if (singleLine) {
7221                mInputType &= ~EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
7222            } else {
7223                mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
7224            }
7225        }
7226    }
7227
7228    private void applySingleLine(boolean singleLine, boolean applyTransformation,
7229            boolean changeMaxLines) {
7230        mSingleLine = singleLine;
7231        if (singleLine) {
7232            setLines(1);
7233            setHorizontallyScrolling(true);
7234            if (applyTransformation) {
7235                setTransformationMethod(SingleLineTransformationMethod.getInstance());
7236            }
7237        } else {
7238            if (changeMaxLines) {
7239                setMaxLines(Integer.MAX_VALUE);
7240            }
7241            setHorizontallyScrolling(false);
7242            if (applyTransformation) {
7243                setTransformationMethod(null);
7244            }
7245        }
7246    }
7247
7248    /**
7249     * Causes words in the text that are longer than the view is wide
7250     * to be ellipsized instead of broken in the middle.  You may also
7251     * want to {@link #setSingleLine} or {@link #setHorizontallyScrolling}
7252     * to constrain the text to a single line.  Use <code>null</code>
7253     * to turn off ellipsizing.
7254     *
7255     * If {@link #setMaxLines} has been used to set two or more lines,
7256     * {@link android.text.TextUtils.TruncateAt#END} and
7257     * {@link android.text.TextUtils.TruncateAt#MARQUEE}* are only supported
7258     * (other ellipsizing types will not do anything).
7259     *
7260     * @attr ref android.R.styleable#TextView_ellipsize
7261     */
7262    public void setEllipsize(TextUtils.TruncateAt where) {
7263        // TruncateAt is an enum. != comparison is ok between these singleton objects.
7264        if (mEllipsize != where) {
7265            mEllipsize = where;
7266
7267            if (mLayout != null) {
7268                nullLayouts();
7269                requestLayout();
7270                invalidate();
7271            }
7272        }
7273    }
7274
7275    /**
7276     * Sets how many times to repeat the marquee animation. Only applied if the
7277     * TextView has marquee enabled. Set to -1 to repeat indefinitely.
7278     *
7279     * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
7280     */
7281    public void setMarqueeRepeatLimit(int marqueeLimit) {
7282        mMarqueeRepeatLimit = marqueeLimit;
7283    }
7284
7285    /**
7286     * Returns where, if anywhere, words that are longer than the view
7287     * is wide should be ellipsized.
7288     */
7289    @ViewDebug.ExportedProperty
7290    public TextUtils.TruncateAt getEllipsize() {
7291        return mEllipsize;
7292    }
7293
7294    /**
7295     * Set the TextView so that when it takes focus, all the text is
7296     * selected.
7297     *
7298     * @attr ref android.R.styleable#TextView_selectAllOnFocus
7299     */
7300    @android.view.RemotableViewMethod
7301    public void setSelectAllOnFocus(boolean selectAllOnFocus) {
7302        mSelectAllOnFocus = selectAllOnFocus;
7303
7304        if (selectAllOnFocus && !(mText instanceof Spannable)) {
7305            setText(mText, BufferType.SPANNABLE);
7306        }
7307    }
7308
7309    /**
7310     * Set whether the cursor is visible.  The default is true.
7311     *
7312     * @attr ref android.R.styleable#TextView_cursorVisible
7313     */
7314    @android.view.RemotableViewMethod
7315    public void setCursorVisible(boolean visible) {
7316        if (mCursorVisible != visible) {
7317            mCursorVisible = visible;
7318            invalidate();
7319
7320            makeBlink();
7321
7322            // InsertionPointCursorController depends on mCursorVisible
7323            prepareCursorControllers();
7324        }
7325    }
7326
7327    private boolean isCursorVisible() {
7328        return mCursorVisible && isTextEditable();
7329    }
7330
7331    private boolean canMarquee() {
7332        int width = (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight());
7333        return width > 0 && (mLayout.getLineWidth(0) > width ||
7334                (mMarqueeFadeMode != MARQUEE_FADE_NORMAL && mSavedMarqueeModeLayout != null &&
7335                        mSavedMarqueeModeLayout.getLineWidth(0) > width));
7336    }
7337
7338    private void startMarquee() {
7339        // Do not ellipsize EditText
7340        if (mInput != null) return;
7341
7342        if (compressText(getWidth() - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
7343            return;
7344        }
7345
7346        if ((mMarquee == null || mMarquee.isStopped()) && (isFocused() || isSelected()) &&
7347                getLineCount() == 1 && canMarquee()) {
7348
7349            if (mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
7350                mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_FADE;
7351                final Layout tmp = mLayout;
7352                mLayout = mSavedMarqueeModeLayout;
7353                mSavedMarqueeModeLayout = tmp;
7354                setHorizontalFadingEdgeEnabled(true);
7355                requestLayout();
7356                invalidate();
7357            }
7358
7359            if (mMarquee == null) mMarquee = new Marquee(this);
7360            mMarquee.start(mMarqueeRepeatLimit);
7361        }
7362    }
7363
7364    private void stopMarquee() {
7365        if (mMarquee != null && !mMarquee.isStopped()) {
7366            mMarquee.stop();
7367        }
7368
7369        if (mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_FADE) {
7370            mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
7371            final Layout tmp = mSavedMarqueeModeLayout;
7372            mSavedMarqueeModeLayout = mLayout;
7373            mLayout = tmp;
7374            setHorizontalFadingEdgeEnabled(false);
7375            requestLayout();
7376            invalidate();
7377        }
7378    }
7379
7380    private void startStopMarquee(boolean start) {
7381        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7382            if (start) {
7383                startMarquee();
7384            } else {
7385                stopMarquee();
7386            }
7387        }
7388    }
7389
7390    private static final class Marquee extends Handler {
7391        // TODO: Add an option to configure this
7392        private static final float MARQUEE_DELTA_MAX = 0.07f;
7393        private static final int MARQUEE_DELAY = 1200;
7394        private static final int MARQUEE_RESTART_DELAY = 1200;
7395        private static final int MARQUEE_RESOLUTION = 1000 / 30;
7396        private static final int MARQUEE_PIXELS_PER_SECOND = 30;
7397
7398        private static final byte MARQUEE_STOPPED = 0x0;
7399        private static final byte MARQUEE_STARTING = 0x1;
7400        private static final byte MARQUEE_RUNNING = 0x2;
7401
7402        private static final int MESSAGE_START = 0x1;
7403        private static final int MESSAGE_TICK = 0x2;
7404        private static final int MESSAGE_RESTART = 0x3;
7405
7406        private final WeakReference<TextView> mView;
7407
7408        private byte mStatus = MARQUEE_STOPPED;
7409        private final float mScrollUnit;
7410        private float mMaxScroll;
7411        float mMaxFadeScroll;
7412        private float mGhostStart;
7413        private float mGhostOffset;
7414        private float mFadeStop;
7415        private int mRepeatLimit;
7416
7417        float mScroll;
7418
7419        Marquee(TextView v) {
7420            final float density = v.getContext().getResources().getDisplayMetrics().density;
7421            mScrollUnit = (MARQUEE_PIXELS_PER_SECOND * density) / MARQUEE_RESOLUTION;
7422            mView = new WeakReference<TextView>(v);
7423        }
7424
7425        @Override
7426        public void handleMessage(Message msg) {
7427            switch (msg.what) {
7428                case MESSAGE_START:
7429                    mStatus = MARQUEE_RUNNING;
7430                    tick();
7431                    break;
7432                case MESSAGE_TICK:
7433                    tick();
7434                    break;
7435                case MESSAGE_RESTART:
7436                    if (mStatus == MARQUEE_RUNNING) {
7437                        if (mRepeatLimit >= 0) {
7438                            mRepeatLimit--;
7439                        }
7440                        start(mRepeatLimit);
7441                    }
7442                    break;
7443            }
7444        }
7445
7446        void tick() {
7447            if (mStatus != MARQUEE_RUNNING) {
7448                return;
7449            }
7450
7451            removeMessages(MESSAGE_TICK);
7452
7453            final TextView textView = mView.get();
7454            if (textView != null && (textView.isFocused() || textView.isSelected())) {
7455                mScroll += mScrollUnit;
7456                if (mScroll > mMaxScroll) {
7457                    mScroll = mMaxScroll;
7458                    sendEmptyMessageDelayed(MESSAGE_RESTART, MARQUEE_RESTART_DELAY);
7459                } else {
7460                    sendEmptyMessageDelayed(MESSAGE_TICK, MARQUEE_RESOLUTION);
7461                }
7462                textView.invalidate();
7463            }
7464        }
7465
7466        void stop() {
7467            mStatus = MARQUEE_STOPPED;
7468            removeMessages(MESSAGE_START);
7469            removeMessages(MESSAGE_RESTART);
7470            removeMessages(MESSAGE_TICK);
7471            resetScroll();
7472        }
7473
7474        private void resetScroll() {
7475            mScroll = 0.0f;
7476            final TextView textView = mView.get();
7477            if (textView != null) textView.invalidate();
7478        }
7479
7480        void start(int repeatLimit) {
7481            if (repeatLimit == 0) {
7482                stop();
7483                return;
7484            }
7485            mRepeatLimit = repeatLimit;
7486            final TextView textView = mView.get();
7487            if (textView != null && textView.mLayout != null) {
7488                mStatus = MARQUEE_STARTING;
7489                mScroll = 0.0f;
7490                final int textWidth = textView.getWidth() - textView.getCompoundPaddingLeft() -
7491                        textView.getCompoundPaddingRight();
7492                final float lineWidth = textView.mLayout.getLineWidth(0);
7493                final float gap = textWidth / 3.0f;
7494                mGhostStart = lineWidth - textWidth + gap;
7495                mMaxScroll = mGhostStart + textWidth;
7496                mGhostOffset = lineWidth + gap;
7497                mFadeStop = lineWidth + textWidth / 6.0f;
7498                mMaxFadeScroll = mGhostStart + lineWidth + lineWidth;
7499
7500                textView.invalidate();
7501                sendEmptyMessageDelayed(MESSAGE_START, MARQUEE_DELAY);
7502            }
7503        }
7504
7505        float getGhostOffset() {
7506            return mGhostOffset;
7507        }
7508
7509        boolean shouldDrawLeftFade() {
7510            return mScroll <= mFadeStop;
7511        }
7512
7513        boolean shouldDrawGhost() {
7514            return mStatus == MARQUEE_RUNNING && mScroll > mGhostStart;
7515        }
7516
7517        boolean isRunning() {
7518            return mStatus == MARQUEE_RUNNING;
7519        }
7520
7521        boolean isStopped() {
7522            return mStatus == MARQUEE_STOPPED;
7523        }
7524    }
7525
7526    /**
7527     * This method is called when the text is changed, in case any subclasses
7528     * would like to know.
7529     *
7530     * Within <code>text</code>, the <code>lengthAfter</code> characters
7531     * beginning at <code>start</code> have just replaced old text that had
7532     * length <code>lengthBefore</code>. It is an error to attempt to make
7533     * changes to <code>text</code> from this callback.
7534     *
7535     * @param text The text the TextView is displaying
7536     * @param start The offset of the start of the range of the text that was
7537     * modified
7538     * @param lengthBefore The length of the former text that has been replaced
7539     * @param lengthAfter The length of the replacement modified text
7540     */
7541    protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
7542        // intentionally empty, template pattern method can be overridden by subclasses
7543    }
7544
7545    /**
7546     * This method is called when the selection has changed, in case any
7547     * subclasses would like to know.
7548     *
7549     * @param selStart The new selection start location.
7550     * @param selEnd The new selection end location.
7551     */
7552    protected void onSelectionChanged(int selStart, int selEnd) {
7553        sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED);
7554    }
7555
7556    /**
7557     * Adds a TextWatcher to the list of those whose methods are called
7558     * whenever this TextView's text changes.
7559     * <p>
7560     * In 1.0, the {@link TextWatcher#afterTextChanged} method was erroneously
7561     * not called after {@link #setText} calls.  Now, doing {@link #setText}
7562     * if there are any text changed listeners forces the buffer type to
7563     * Editable if it would not otherwise be and does call this method.
7564     */
7565    public void addTextChangedListener(TextWatcher watcher) {
7566        if (mListeners == null) {
7567            mListeners = new ArrayList<TextWatcher>();
7568        }
7569
7570        mListeners.add(watcher);
7571    }
7572
7573    /**
7574     * Removes the specified TextWatcher from the list of those whose
7575     * methods are called
7576     * whenever this TextView's text changes.
7577     */
7578    public void removeTextChangedListener(TextWatcher watcher) {
7579        if (mListeners != null) {
7580            int i = mListeners.indexOf(watcher);
7581
7582            if (i >= 0) {
7583                mListeners.remove(i);
7584            }
7585        }
7586    }
7587
7588    private void sendBeforeTextChanged(CharSequence text, int start, int before, int after) {
7589        if (mListeners != null) {
7590            final ArrayList<TextWatcher> list = mListeners;
7591            final int count = list.size();
7592            for (int i = 0; i < count; i++) {
7593                list.get(i).beforeTextChanged(text, start, before, after);
7594            }
7595        }
7596
7597        // The spans that are inside or intersect the modified region no longer make sense
7598        removeIntersectingSpans(start, start + before, SpellCheckSpan.class);
7599        removeIntersectingSpans(start, start + before, SuggestionSpan.class);
7600    }
7601
7602    // Removes all spans that are inside or actually overlap the start..end range
7603    private <T> void removeIntersectingSpans(int start, int end, Class<T> type) {
7604        if (!(mText instanceof Editable)) return;
7605        Editable text = (Editable) mText;
7606
7607        T[] spans = text.getSpans(start, end, type);
7608        final int length = spans.length;
7609        for (int i = 0; i < length; i++) {
7610            final int s = text.getSpanStart(spans[i]);
7611            final int e = text.getSpanEnd(spans[i]);
7612            // Spans that are adjacent to the edited region will be handled in
7613            // updateSpellCheckSpans. Result depends on what will be added (space or text)
7614            if (e == start || s == end) break;
7615            text.removeSpan(spans[i]);
7616        }
7617    }
7618
7619    /**
7620     * Not private so it can be called from an inner class without going
7621     * through a thunk.
7622     */
7623    void sendOnTextChanged(CharSequence text, int start, int before, int after) {
7624        if (mListeners != null) {
7625            final ArrayList<TextWatcher> list = mListeners;
7626            final int count = list.size();
7627            for (int i = 0; i < count; i++) {
7628                list.get(i).onTextChanged(text, start, before, after);
7629            }
7630        }
7631    }
7632
7633    /**
7634     * Not private so it can be called from an inner class without going
7635     * through a thunk.
7636     */
7637    void sendAfterTextChanged(Editable text) {
7638        if (mListeners != null) {
7639            final ArrayList<TextWatcher> list = mListeners;
7640            final int count = list.size();
7641            for (int i = 0; i < count; i++) {
7642                list.get(i).afterTextChanged(text);
7643            }
7644        }
7645    }
7646
7647    /**
7648     * Not private so it can be called from an inner class without going
7649     * through a thunk.
7650     */
7651    void handleTextChanged(CharSequence buffer, int start, int before, int after) {
7652        final InputMethodState ims = mInputMethodState;
7653        if (ims == null || ims.mBatchEditNesting == 0) {
7654            updateAfterEdit();
7655        }
7656        if (ims != null) {
7657            ims.mContentChanged = true;
7658            if (ims.mChangedStart < 0) {
7659                ims.mChangedStart = start;
7660                ims.mChangedEnd = start+before;
7661            } else {
7662                ims.mChangedStart = Math.min(ims.mChangedStart, start);
7663                ims.mChangedEnd = Math.max(ims.mChangedEnd, start + before - ims.mChangedDelta);
7664            }
7665            ims.mChangedDelta += after-before;
7666        }
7667
7668        sendOnTextChanged(buffer, start, before, after);
7669        onTextChanged(buffer, start, before, after);
7670
7671        updateSpellCheckSpans(start, start + after);
7672
7673        // Hide the controllers if the amount of content changed
7674        if (before != after) {
7675            // We do not hide the span controllers, as they can be added when a new text is
7676            // inserted into the text view
7677            hideCursorControllers();
7678        }
7679    }
7680
7681    /**
7682     * Not private so it can be called from an inner class without going
7683     * through a thunk.
7684     */
7685    void spanChange(Spanned buf, Object what, int oldStart, int newStart, int oldEnd, int newEnd) {
7686        // XXX Make the start and end move together if this ends up
7687        // spending too much time invalidating.
7688
7689        boolean selChanged = false;
7690        int newSelStart=-1, newSelEnd=-1;
7691
7692        final InputMethodState ims = mInputMethodState;
7693
7694        if (what == Selection.SELECTION_END) {
7695            mHighlightPathBogus = true;
7696            selChanged = true;
7697            newSelEnd = newStart;
7698
7699            if (!isFocused()) {
7700                mSelectionMoved = true;
7701            }
7702
7703            if (oldStart >= 0 || newStart >= 0) {
7704                invalidateCursor(Selection.getSelectionStart(buf), oldStart, newStart);
7705                registerForPreDraw();
7706                makeBlink();
7707            }
7708        }
7709
7710        if (what == Selection.SELECTION_START) {
7711            mHighlightPathBogus = true;
7712            selChanged = true;
7713            newSelStart = newStart;
7714
7715            if (!isFocused()) {
7716                mSelectionMoved = true;
7717            }
7718
7719            if (oldStart >= 0 || newStart >= 0) {
7720                int end = Selection.getSelectionEnd(buf);
7721                invalidateCursor(end, oldStart, newStart);
7722            }
7723        }
7724
7725        if (selChanged) {
7726            if ((buf.getSpanFlags(what)&Spanned.SPAN_INTERMEDIATE) == 0) {
7727                if (newSelStart < 0) {
7728                    newSelStart = Selection.getSelectionStart(buf);
7729                }
7730                if (newSelEnd < 0) {
7731                    newSelEnd = Selection.getSelectionEnd(buf);
7732                }
7733                onSelectionChanged(newSelStart, newSelEnd);
7734            }
7735        }
7736
7737        if (what instanceof UpdateAppearance || what instanceof ParagraphStyle
7738                || (what instanceof SuggestionSpan && (((SuggestionSpan)what).getFlags()
7739                        & SuggestionSpan.FLAG_AUTO_CORRECTION) != 0)) {
7740            if (ims == null || ims.mBatchEditNesting == 0) {
7741                invalidate();
7742                mHighlightPathBogus = true;
7743                checkForResize();
7744            } else {
7745                ims.mContentChanged = true;
7746            }
7747        }
7748
7749        if (MetaKeyKeyListener.isMetaTracker(buf, what)) {
7750            mHighlightPathBogus = true;
7751            if (ims != null && MetaKeyKeyListener.isSelectingMetaTracker(buf, what)) {
7752                ims.mSelectionModeChanged = true;
7753            }
7754
7755            if (Selection.getSelectionStart(buf) >= 0) {
7756                if (ims == null || ims.mBatchEditNesting == 0) {
7757                    invalidateCursor();
7758                } else {
7759                    ims.mCursorChanged = true;
7760                }
7761            }
7762        }
7763
7764        if (what instanceof ParcelableSpan) {
7765            // If this is a span that can be sent to a remote process,
7766            // the current extract editor would be interested in it.
7767            if (ims != null && ims.mExtracting != null) {
7768                if (ims.mBatchEditNesting != 0) {
7769                    if (oldStart >= 0) {
7770                        if (ims.mChangedStart > oldStart) {
7771                            ims.mChangedStart = oldStart;
7772                        }
7773                        if (ims.mChangedStart > oldEnd) {
7774                            ims.mChangedStart = oldEnd;
7775                        }
7776                    }
7777                    if (newStart >= 0) {
7778                        if (ims.mChangedStart > newStart) {
7779                            ims.mChangedStart = newStart;
7780                        }
7781                        if (ims.mChangedStart > newEnd) {
7782                            ims.mChangedStart = newEnd;
7783                        }
7784                    }
7785                } else {
7786                    if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Span change outside of batch: "
7787                            + oldStart + "-" + oldEnd + ","
7788                            + newStart + "-" + newEnd + what);
7789                    ims.mContentChanged = true;
7790                }
7791            }
7792        }
7793
7794        if (newStart < 0 && what instanceof SpellCheckSpan) {
7795            getSpellChecker().removeSpellCheckSpan((SpellCheckSpan) what);
7796        }
7797    }
7798
7799    /**
7800     * Create new SpellCheckSpans on the modified region.
7801     */
7802    private void updateSpellCheckSpans(int start, int end) {
7803        if (isTextEditable() && isSuggestionsEnabled()) {
7804            getSpellChecker().spellCheck(start, end);
7805        }
7806    }
7807
7808    /**
7809     * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related
7810     * pop-up should be displayed.
7811     */
7812    private class EasyEditSpanController {
7813
7814        private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs
7815
7816        private EasyEditPopupWindow mPopupWindow;
7817
7818        private EasyEditSpan mEasyEditSpan;
7819
7820        private Runnable mHidePopup;
7821
7822        private void hide() {
7823            if (mPopupWindow != null) {
7824                mPopupWindow.hide();
7825                TextView.this.removeCallbacks(mHidePopup);
7826            }
7827            removeSpans(mText);
7828            mEasyEditSpan = null;
7829        }
7830
7831        /**
7832         * Monitors the changes in the text.
7833         *
7834         * <p>{@link ChangeWatcher#onSpanAdded(Spannable, Object, int, int)} cannot be used,
7835         * as the notifications are not sent when a spannable (with spans) is inserted.
7836         */
7837        public void onTextChange(CharSequence buffer) {
7838            adjustSpans(mText);
7839
7840            if (getWindowVisibility() != View.VISIBLE) {
7841                // The window is not visible yet, ignore the text change.
7842                return;
7843            }
7844
7845            if (mLayout == null) {
7846                // The view has not been layout yet, ignore the text change
7847                return;
7848            }
7849
7850            InputMethodManager imm = InputMethodManager.peekInstance();
7851            if (!(TextView.this instanceof ExtractEditText)
7852                    && imm != null && imm.isFullscreenMode()) {
7853                // The input is in extract mode. We do not have to handle the easy edit in the
7854                // original TextView, as the ExtractEditText will do
7855                return;
7856            }
7857
7858            // Remove the current easy edit span, as the text changed, and remove the pop-up
7859            // (if any)
7860            if (mEasyEditSpan != null) {
7861                if (mText instanceof Spannable) {
7862                    ((Spannable) mText).removeSpan(mEasyEditSpan);
7863                }
7864                mEasyEditSpan = null;
7865            }
7866            if (mPopupWindow != null && mPopupWindow.isShowing()) {
7867                mPopupWindow.hide();
7868            }
7869
7870            // Display the new easy edit span (if any).
7871            if (buffer instanceof Spanned) {
7872                mEasyEditSpan = getSpan((Spanned) buffer);
7873                if (mEasyEditSpan != null) {
7874                    if (mPopupWindow == null) {
7875                        mPopupWindow = new EasyEditPopupWindow();
7876                        mHidePopup = new Runnable() {
7877                            @Override
7878                            public void run() {
7879                                hide();
7880                            }
7881                        };
7882                    }
7883                    mPopupWindow.show(mEasyEditSpan);
7884                    TextView.this.removeCallbacks(mHidePopup);
7885                    TextView.this.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS);
7886                }
7887            }
7888        }
7889
7890        /**
7891         * Adjusts the spans by removing all of them except the last one.
7892         */
7893        private void adjustSpans(CharSequence buffer) {
7894            // This method enforces that only one easy edit span is attached to the text.
7895            // A better way to enforce this would be to listen for onSpanAdded, but this method
7896            // cannot be used in this scenario as no notification is triggered when a text with
7897            // spans is inserted into a text.
7898            if (buffer instanceof Spannable) {
7899                Spannable spannable = (Spannable) buffer;
7900                EasyEditSpan[] spans = spannable.getSpans(0, spannable.length(),
7901                        EasyEditSpan.class);
7902                for (int i = 0; i < spans.length - 1; i++) {
7903                    spannable.removeSpan(spans[i]);
7904                }
7905            }
7906        }
7907
7908        /**
7909         * Removes all the {@link EasyEditSpan} currently attached.
7910         */
7911        private void removeSpans(CharSequence buffer) {
7912            if (buffer instanceof Spannable) {
7913                Spannable spannable = (Spannable) buffer;
7914                EasyEditSpan[] spans = spannable.getSpans(0, spannable.length(),
7915                        EasyEditSpan.class);
7916                for (int i = 0; i < spans.length; i++) {
7917                    spannable.removeSpan(spans[i]);
7918                }
7919            }
7920        }
7921
7922        private EasyEditSpan getSpan(Spanned spanned) {
7923            EasyEditSpan[] easyEditSpans = spanned.getSpans(0, spanned.length(),
7924                    EasyEditSpan.class);
7925            if (easyEditSpans.length == 0) {
7926                return null;
7927            } else {
7928                return easyEditSpans[0];
7929            }
7930        }
7931    }
7932
7933    /**
7934     * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled
7935     * by {@link EasyEditSpanController}.
7936     */
7937    private class EasyEditPopupWindow extends PinnedPopupWindow
7938            implements OnClickListener {
7939        private static final int POPUP_TEXT_LAYOUT =
7940                com.android.internal.R.layout.text_edit_action_popup_text;
7941        private TextView mDeleteTextView;
7942        private EasyEditSpan mEasyEditSpan;
7943
7944        @Override
7945        protected void createPopupWindow() {
7946            mPopupWindow = new PopupWindow(TextView.this.mContext, null,
7947                    com.android.internal.R.attr.textSelectHandleWindowStyle);
7948            mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
7949            mPopupWindow.setClippingEnabled(true);
7950        }
7951
7952        @Override
7953        protected void initContentView() {
7954            LinearLayout linearLayout = new LinearLayout(TextView.this.getContext());
7955            linearLayout.setOrientation(LinearLayout.HORIZONTAL);
7956            mContentView = linearLayout;
7957            mContentView.setBackgroundResource(
7958                    com.android.internal.R.drawable.text_edit_side_paste_window);
7959
7960            LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
7961                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
7962
7963            LayoutParams wrapContent = new LayoutParams(
7964                    ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
7965
7966            mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
7967            mDeleteTextView.setLayoutParams(wrapContent);
7968            mDeleteTextView.setText(com.android.internal.R.string.delete);
7969            mDeleteTextView.setOnClickListener(this);
7970            mContentView.addView(mDeleteTextView);
7971        }
7972
7973        public void show(EasyEditSpan easyEditSpan) {
7974            mEasyEditSpan = easyEditSpan;
7975            super.show();
7976        }
7977
7978        @Override
7979        public void onClick(View view) {
7980            if (view == mDeleteTextView) {
7981                deleteText();
7982            }
7983        }
7984
7985        private void deleteText() {
7986            Editable editable = (Editable) mText;
7987            int start = editable.getSpanStart(mEasyEditSpan);
7988            int end = editable.getSpanEnd(mEasyEditSpan);
7989            if (start >= 0 && end >= 0) {
7990                editable.delete(start, end);
7991            }
7992        }
7993
7994        @Override
7995        protected int getTextOffset() {
7996            // Place the pop-up at the end of the span
7997            Editable editable = (Editable) mText;
7998            return editable.getSpanEnd(mEasyEditSpan);
7999        }
8000
8001        @Override
8002        protected int getVerticalLocalPosition(int line) {
8003            return mLayout.getLineBottom(line);
8004        }
8005
8006        @Override
8007        protected int clipVertically(int positionY) {
8008            // As we display the pop-up below the span, no vertical clipping is required.
8009            return positionY;
8010        }
8011    }
8012
8013    private class ChangeWatcher implements TextWatcher, SpanWatcher {
8014
8015        private CharSequence mBeforeText;
8016
8017        private EasyEditSpanController mEasyEditSpanController;
8018
8019        private ChangeWatcher() {
8020            mEasyEditSpanController = new EasyEditSpanController();
8021        }
8022
8023        public void beforeTextChanged(CharSequence buffer, int start,
8024                                      int before, int after) {
8025            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "beforeTextChanged start=" + start
8026                    + " before=" + before + " after=" + after + ": " + buffer);
8027
8028            if (AccessibilityManager.getInstance(mContext).isEnabled()
8029                    && !isPasswordInputType(mInputType)
8030                    && !hasPasswordTransformationMethod()) {
8031                mBeforeText = buffer.toString();
8032            }
8033
8034            TextView.this.sendBeforeTextChanged(buffer, start, before, after);
8035        }
8036
8037        public void onTextChanged(CharSequence buffer, int start,
8038                                  int before, int after) {
8039            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onTextChanged start=" + start
8040                    + " before=" + before + " after=" + after + ": " + buffer);
8041            TextView.this.handleTextChanged(buffer, start, before, after);
8042
8043            mEasyEditSpanController.onTextChange(buffer);
8044
8045            if (AccessibilityManager.getInstance(mContext).isEnabled() &&
8046                    (isFocused() || isSelected() && isShown())) {
8047                sendAccessibilityEventTypeViewTextChanged(mBeforeText, start, before, after);
8048                mBeforeText = null;
8049            }
8050        }
8051
8052        public void afterTextChanged(Editable buffer) {
8053            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "afterTextChanged: " + buffer);
8054            TextView.this.sendAfterTextChanged(buffer);
8055
8056            if (MetaKeyKeyListener.getMetaState(buffer, MetaKeyKeyListener.META_SELECTING) != 0) {
8057                MetaKeyKeyListener.stopSelecting(TextView.this, buffer);
8058            }
8059        }
8060
8061        public void onSpanChanged(Spannable buf,
8062                                  Object what, int s, int e, int st, int en) {
8063            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanChanged s=" + s + " e=" + e
8064                    + " st=" + st + " en=" + en + " what=" + what + ": " + buf);
8065            TextView.this.spanChange(buf, what, s, st, e, en);
8066        }
8067
8068        public void onSpanAdded(Spannable buf, Object what, int s, int e) {
8069            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanAdded s=" + s + " e=" + e
8070                    + " what=" + what + ": " + buf);
8071            TextView.this.spanChange(buf, what, -1, s, -1, e);
8072        }
8073
8074        public void onSpanRemoved(Spannable buf, Object what, int s, int e) {
8075            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanRemoved s=" + s + " e=" + e
8076                    + " what=" + what + ": " + buf);
8077            TextView.this.spanChange(buf, what, s, -1, e, -1);
8078        }
8079
8080        private void hideControllers() {
8081            mEasyEditSpanController.hide();
8082        }
8083    }
8084
8085    /**
8086     * @hide
8087     */
8088    @Override
8089    public void dispatchFinishTemporaryDetach() {
8090        mDispatchTemporaryDetach = true;
8091        super.dispatchFinishTemporaryDetach();
8092        mDispatchTemporaryDetach = false;
8093    }
8094
8095    @Override
8096    public void onStartTemporaryDetach() {
8097        super.onStartTemporaryDetach();
8098        // Only track when onStartTemporaryDetach() is called directly,
8099        // usually because this instance is an editable field in a list
8100        if (!mDispatchTemporaryDetach) mTemporaryDetach = true;
8101
8102        // Because of View recycling in ListView, there is no easy way to know when a TextView with
8103        // selection becomes visible again. Until a better solution is found, stop text selection
8104        // mode (if any) as soon as this TextView is recycled.
8105        hideControllers();
8106    }
8107
8108    @Override
8109    public void onFinishTemporaryDetach() {
8110        super.onFinishTemporaryDetach();
8111        // Only track when onStartTemporaryDetach() is called directly,
8112        // usually because this instance is an editable field in a list
8113        if (!mDispatchTemporaryDetach) mTemporaryDetach = false;
8114    }
8115
8116    @Override
8117    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
8118        if (mTemporaryDetach) {
8119            // If we are temporarily in the detach state, then do nothing.
8120            super.onFocusChanged(focused, direction, previouslyFocusedRect);
8121            return;
8122        }
8123
8124        mShowCursor = SystemClock.uptimeMillis();
8125
8126        ensureEndedBatchEdit();
8127
8128        if (focused) {
8129            int selStart = getSelectionStart();
8130            int selEnd = getSelectionEnd();
8131
8132            // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection
8133            // mode for these, unless there was a specific selection already started.
8134            final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 &&
8135                    selEnd == mText.length();
8136            mCreatedWithASelection = mFrozenWithFocus && hasSelection() && !isFocusHighlighted;
8137
8138            if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) {
8139                // If a tap was used to give focus to that view, move cursor at tap position.
8140                // Has to be done before onTakeFocus, which can be overloaded.
8141                final int lastTapPosition = getLastTapPosition();
8142                if (lastTapPosition >= 0) {
8143                    Selection.setSelection((Spannable) mText, lastTapPosition);
8144                }
8145
8146                if (mMovement != null) {
8147                    mMovement.onTakeFocus(this, (Spannable) mText, direction);
8148                }
8149
8150                // The DecorView does not have focus when the 'Done' ExtractEditText button is
8151                // pressed. Since it is the ViewAncestor's mView, it requests focus before
8152                // ExtractEditText clears focus, which gives focus to the ExtractEditText.
8153                // This special case ensure that we keep current selection in that case.
8154                // It would be better to know why the DecorView does not have focus at that time.
8155                if (((this instanceof ExtractEditText) || mSelectionMoved) &&
8156                        selStart >= 0 && selEnd >= 0) {
8157                    /*
8158                     * Someone intentionally set the selection, so let them
8159                     * do whatever it is that they wanted to do instead of
8160                     * the default on-focus behavior.  We reset the selection
8161                     * here instead of just skipping the onTakeFocus() call
8162                     * because some movement methods do something other than
8163                     * just setting the selection in theirs and we still
8164                     * need to go through that path.
8165                     */
8166                    Selection.setSelection((Spannable) mText, selStart, selEnd);
8167                }
8168
8169                if (mSelectAllOnFocus) {
8170                    selectAll();
8171                }
8172
8173                mTouchFocusSelected = true;
8174            }
8175
8176            mFrozenWithFocus = false;
8177            mSelectionMoved = false;
8178
8179            if (mText instanceof Spannable) {
8180                Spannable sp = (Spannable) mText;
8181                MetaKeyKeyListener.resetMetaState(sp);
8182            }
8183
8184            makeBlink();
8185
8186            if (mError != null) {
8187                showError();
8188            }
8189        } else {
8190            if (mError != null) {
8191                hideError();
8192            }
8193            // Don't leave us in the middle of a batch edit.
8194            onEndBatchEdit();
8195
8196            if (this instanceof ExtractEditText) {
8197                // terminateTextSelectionMode removes selection, which we want to keep when
8198                // ExtractEditText goes out of focus.
8199                final int selStart = getSelectionStart();
8200                final int selEnd = getSelectionEnd();
8201                hideControllers();
8202                Selection.setSelection((Spannable) mText, selStart, selEnd);
8203            } else {
8204                hideControllers();
8205                downgradeEasyCorrectionSpans();
8206            }
8207
8208            // No need to create the controller
8209            if (mSelectionModifierCursorController != null) {
8210                mSelectionModifierCursorController.resetTouchOffsets();
8211            }
8212        }
8213
8214        startStopMarquee(focused);
8215
8216        if (mTransformation != null) {
8217            mTransformation.onFocusChanged(this, mText, focused, direction, previouslyFocusedRect);
8218        }
8219
8220        super.onFocusChanged(focused, direction, previouslyFocusedRect);
8221    }
8222
8223    private int getLastTapPosition() {
8224        // No need to create the controller at that point, no last tap position saved
8225        if (mSelectionModifierCursorController != null) {
8226            int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset();
8227            if (lastTapPosition >= 0) {
8228                // Safety check, should not be possible.
8229                if (lastTapPosition > mText.length()) {
8230                    Log.e(LOG_TAG, "Invalid tap focus position (" + lastTapPosition + " vs "
8231                            + mText.length() + ")");
8232                    lastTapPosition = mText.length();
8233                }
8234                return lastTapPosition;
8235            }
8236        }
8237
8238        return -1;
8239    }
8240
8241    @Override
8242    public void onWindowFocusChanged(boolean hasWindowFocus) {
8243        super.onWindowFocusChanged(hasWindowFocus);
8244
8245        if (hasWindowFocus) {
8246            if (mBlink != null) {
8247                mBlink.uncancel();
8248                makeBlink();
8249            }
8250        } else {
8251            if (mBlink != null) {
8252                mBlink.cancel();
8253            }
8254            // Don't leave us in the middle of a batch edit.
8255            onEndBatchEdit();
8256            if (mInputContentType != null) {
8257                mInputContentType.enterDown = false;
8258            }
8259
8260            hideControllers();
8261            if (mSuggestionsPopupWindow != null) {
8262                mSuggestionsPopupWindow.onParentLostFocus();
8263            }
8264        }
8265
8266        startStopMarquee(hasWindowFocus);
8267    }
8268
8269    @Override
8270    protected void onVisibilityChanged(View changedView, int visibility) {
8271        super.onVisibilityChanged(changedView, visibility);
8272        if (visibility != VISIBLE) {
8273            hideControllers();
8274        }
8275    }
8276
8277    /**
8278     * Use {@link BaseInputConnection#removeComposingSpans
8279     * BaseInputConnection.removeComposingSpans()} to remove any IME composing
8280     * state from this text view.
8281     */
8282    public void clearComposingText() {
8283        if (mText instanceof Spannable) {
8284            BaseInputConnection.removeComposingSpans((Spannable)mText);
8285        }
8286    }
8287
8288    @Override
8289    public void setSelected(boolean selected) {
8290        boolean wasSelected = isSelected();
8291
8292        super.setSelected(selected);
8293
8294        if (selected != wasSelected && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
8295            if (selected) {
8296                startMarquee();
8297            } else {
8298                stopMarquee();
8299            }
8300        }
8301    }
8302
8303    @Override
8304    public boolean onTouchEvent(MotionEvent event) {
8305        final int action = event.getActionMasked();
8306
8307        if (hasSelectionController()) {
8308            getSelectionController().onTouchEvent(event);
8309        }
8310
8311        if (action == MotionEvent.ACTION_DOWN) {
8312            mLastDownPositionX = event.getX();
8313            mLastDownPositionY = event.getY();
8314
8315            // Reset this state; it will be re-set if super.onTouchEvent
8316            // causes focus to move to the view.
8317            mTouchFocusSelected = false;
8318            mIgnoreActionUpEvent = false;
8319        }
8320
8321        final boolean superResult = super.onTouchEvent(event);
8322
8323        /*
8324         * Don't handle the release after a long press, because it will
8325         * move the selection away from whatever the menu action was
8326         * trying to affect.
8327         */
8328        if (mDiscardNextActionUp && action == MotionEvent.ACTION_UP) {
8329            mDiscardNextActionUp = false;
8330            return superResult;
8331        }
8332
8333        final boolean touchIsFinished = (action == MotionEvent.ACTION_UP) &&
8334                !shouldIgnoreActionUpEvent() && isFocused();
8335
8336         if ((mMovement != null || onCheckIsTextEditor()) && isEnabled()
8337                && mText instanceof Spannable && mLayout != null) {
8338            boolean handled = false;
8339
8340            if (mMovement != null) {
8341                handled |= mMovement.onTouchEvent(this, (Spannable) mText, event);
8342            }
8343
8344            if (touchIsFinished && mLinksClickable && mAutoLinkMask != 0 && mTextIsSelectable) {
8345                // The LinkMovementMethod which should handle taps on links has not been installed
8346                // on non editable text that support text selection.
8347                // We reproduce its behavior here to open links for these.
8348                ClickableSpan[] links = ((Spannable) mText).getSpans(getSelectionStart(),
8349                        getSelectionEnd(), ClickableSpan.class);
8350
8351                if (links.length != 0) {
8352                    links[0].onClick(this);
8353                    handled = true;
8354                }
8355            }
8356
8357            if (touchIsFinished && (isTextEditable() || mTextIsSelectable)) {
8358                // Show the IME, except when selecting in read-only text.
8359                final InputMethodManager imm = InputMethodManager.peekInstance();
8360                viewClicked(imm);
8361                if (!mTextIsSelectable && mSoftInputShownOnFocus) {
8362                    handled |= imm != null && imm.showSoftInput(this, 0);
8363                }
8364
8365                boolean selectAllGotFocus = mSelectAllOnFocus && didTouchFocusSelect();
8366                hideControllers();
8367                if (!selectAllGotFocus && mText.length() > 0) {
8368                    if (mSpellChecker != null) {
8369                        // When the cursor moves, the word that was typed may need spell check
8370                        mSpellChecker.onSelectionChanged();
8371                    }
8372                    if (isCursorInsideEasyCorrectionSpan()) {
8373                        showSuggestions();
8374                    } else if (hasInsertionController()) {
8375                        getInsertionController().show();
8376                    }
8377                }
8378
8379                handled = true;
8380            }
8381
8382            if (handled) {
8383                return true;
8384            }
8385        }
8386
8387        return superResult;
8388    }
8389
8390    /**
8391     * @return <code>true</code> if the cursor/current selection overlaps a {@link SuggestionSpan}.
8392     */
8393    private boolean isCursorInsideSuggestionSpan() {
8394        if (!(mText instanceof Spannable)) return false;
8395
8396        SuggestionSpan[] suggestionSpans = ((Spannable) mText).getSpans(getSelectionStart(),
8397                getSelectionEnd(), SuggestionSpan.class);
8398        return (suggestionSpans.length > 0);
8399    }
8400
8401    /**
8402     * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with
8403     * {@link SuggestionSpan#FLAG_EASY_CORRECT} set.
8404     */
8405    private boolean isCursorInsideEasyCorrectionSpan() {
8406        Spannable spannable = (Spannable) mText;
8407        SuggestionSpan[] suggestionSpans = spannable.getSpans(getSelectionStart(),
8408                getSelectionEnd(), SuggestionSpan.class);
8409        for (int i = 0; i < suggestionSpans.length; i++) {
8410            if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) {
8411                return true;
8412            }
8413        }
8414        return false;
8415    }
8416
8417    /**
8418     * Downgrades to simple suggestions all the easy correction spans that are not a spell check
8419     * span.
8420     */
8421    private void downgradeEasyCorrectionSpans() {
8422        if (mText instanceof Spannable) {
8423            Spannable spannable = (Spannable) mText;
8424            SuggestionSpan[] suggestionSpans = spannable.getSpans(0,
8425                    spannable.length(), SuggestionSpan.class);
8426            for (int i = 0; i < suggestionSpans.length; i++) {
8427                int flags = suggestionSpans[i].getFlags();
8428                if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0
8429                        && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) {
8430                    flags &= ~SuggestionSpan.FLAG_EASY_CORRECT;
8431                    suggestionSpans[i].setFlags(flags);
8432                }
8433            }
8434        }
8435    }
8436
8437    @Override
8438    public boolean onGenericMotionEvent(MotionEvent event) {
8439        if (mMovement != null && mText instanceof Spannable && mLayout != null) {
8440            try {
8441                if (mMovement.onGenericMotionEvent(this, (Spannable) mText, event)) {
8442                    return true;
8443                }
8444            } catch (AbstractMethodError ex) {
8445                // onGenericMotionEvent was added to the MovementMethod interface in API 12.
8446                // Ignore its absence in case third party applications implemented the
8447                // interface directly.
8448            }
8449        }
8450        return super.onGenericMotionEvent(event);
8451    }
8452
8453    private void prepareCursorControllers() {
8454        boolean windowSupportsHandles = false;
8455
8456        ViewGroup.LayoutParams params = getRootView().getLayoutParams();
8457        if (params instanceof WindowManager.LayoutParams) {
8458            WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params;
8459            windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW
8460                    || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW;
8461        }
8462
8463        mInsertionControllerEnabled = windowSupportsHandles && isCursorVisible() && mLayout != null;
8464        mSelectionControllerEnabled = windowSupportsHandles && textCanBeSelected() &&
8465                mLayout != null;
8466
8467        if (!mInsertionControllerEnabled) {
8468            hideInsertionPointCursorController();
8469            if (mInsertionPointCursorController != null) {
8470                mInsertionPointCursorController.onDetached();
8471                mInsertionPointCursorController = null;
8472            }
8473        }
8474
8475        if (!mSelectionControllerEnabled) {
8476            stopSelectionActionMode();
8477            if (mSelectionModifierCursorController != null) {
8478                mSelectionModifierCursorController.onDetached();
8479                mSelectionModifierCursorController = null;
8480            }
8481        }
8482    }
8483
8484    /**
8485     * @return True iff this TextView contains a text that can be edited, or if this is
8486     * a selectable TextView.
8487     */
8488    private boolean isTextEditable() {
8489        return mText instanceof Editable && onCheckIsTextEditor() && isEnabled();
8490    }
8491
8492    /**
8493     * Returns true, only while processing a touch gesture, if the initial
8494     * touch down event caused focus to move to the text view and as a result
8495     * its selection changed.  Only valid while processing the touch gesture
8496     * of interest.
8497     */
8498    public boolean didTouchFocusSelect() {
8499        return mTouchFocusSelected;
8500    }
8501
8502    @Override
8503    public void cancelLongPress() {
8504        super.cancelLongPress();
8505        mIgnoreActionUpEvent = true;
8506    }
8507
8508    /**
8509     * This method is only valid during a touch event.
8510     *
8511     * @return true when the ACTION_UP event should be ignored, false otherwise.
8512     *
8513     * @hide
8514     */
8515    public boolean shouldIgnoreActionUpEvent() {
8516        return mIgnoreActionUpEvent;
8517    }
8518
8519    @Override
8520    public boolean onTrackballEvent(MotionEvent event) {
8521        if (mMovement != null && mText instanceof Spannable &&
8522            mLayout != null) {
8523            if (mMovement.onTrackballEvent(this, (Spannable) mText, event)) {
8524                return true;
8525            }
8526        }
8527
8528        return super.onTrackballEvent(event);
8529    }
8530
8531    public void setScroller(Scroller s) {
8532        mScroller = s;
8533    }
8534
8535    private static class Blink extends Handler implements Runnable {
8536        private final WeakReference<TextView> mView;
8537        private boolean mCancelled;
8538
8539        public Blink(TextView v) {
8540            mView = new WeakReference<TextView>(v);
8541        }
8542
8543        public void run() {
8544            if (mCancelled) {
8545                return;
8546            }
8547
8548            removeCallbacks(Blink.this);
8549
8550            TextView tv = mView.get();
8551
8552            if (tv != null && tv.shouldBlink()) {
8553                if (tv.mLayout != null) {
8554                    tv.invalidateCursorPath();
8555                }
8556
8557                postAtTime(this, SystemClock.uptimeMillis() + BLINK);
8558            }
8559        }
8560
8561        void cancel() {
8562            if (!mCancelled) {
8563                removeCallbacks(Blink.this);
8564                mCancelled = true;
8565            }
8566        }
8567
8568        void uncancel() {
8569            mCancelled = false;
8570        }
8571    }
8572
8573    /**
8574     * @return True when the TextView isFocused and has a valid zero-length selection (cursor).
8575     */
8576    private boolean shouldBlink() {
8577        if (!isFocused()) return false;
8578
8579        final int start = getSelectionStart();
8580        if (start < 0) return false;
8581
8582        final int end = getSelectionEnd();
8583        if (end < 0) return false;
8584
8585        return start == end;
8586    }
8587
8588    private void makeBlink() {
8589        if (isCursorVisible()) {
8590            if (shouldBlink()) {
8591                mShowCursor = SystemClock.uptimeMillis();
8592                if (mBlink == null) mBlink = new Blink(this);
8593                mBlink.removeCallbacks(mBlink);
8594                mBlink.postAtTime(mBlink, mShowCursor + BLINK);
8595            }
8596        } else {
8597            if (mBlink != null) mBlink.removeCallbacks(mBlink);
8598        }
8599    }
8600
8601    @Override
8602    protected float getLeftFadingEdgeStrength() {
8603        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
8604        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
8605                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
8606            if (mMarquee != null && !mMarquee.isStopped()) {
8607                final Marquee marquee = mMarquee;
8608                if (marquee.shouldDrawLeftFade()) {
8609                    return marquee.mScroll / getHorizontalFadingEdgeLength();
8610                } else {
8611                    return 0.0f;
8612                }
8613            } else if (getLineCount() == 1) {
8614                final int layoutDirection = getResolvedLayoutDirection();
8615                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8616                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8617                    case Gravity.LEFT:
8618                        return 0.0f;
8619                    case Gravity.RIGHT:
8620                        return (mLayout.getLineRight(0) - (mRight - mLeft) -
8621                                getCompoundPaddingLeft() - getCompoundPaddingRight() -
8622                                mLayout.getLineLeft(0)) / getHorizontalFadingEdgeLength();
8623                    case Gravity.CENTER_HORIZONTAL:
8624                        return 0.0f;
8625                }
8626            }
8627        }
8628        return super.getLeftFadingEdgeStrength();
8629    }
8630
8631    @Override
8632    protected float getRightFadingEdgeStrength() {
8633        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
8634        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
8635                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
8636            if (mMarquee != null && !mMarquee.isStopped()) {
8637                final Marquee marquee = mMarquee;
8638                return (marquee.mMaxFadeScroll - marquee.mScroll) / getHorizontalFadingEdgeLength();
8639            } else if (getLineCount() == 1) {
8640                final int layoutDirection = getResolvedLayoutDirection();
8641                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8642                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8643                    case Gravity.LEFT:
8644                        final int textWidth = (mRight - mLeft) - getCompoundPaddingLeft() -
8645                                getCompoundPaddingRight();
8646                        final float lineWidth = mLayout.getLineWidth(0);
8647                        return (lineWidth - textWidth) / getHorizontalFadingEdgeLength();
8648                    case Gravity.RIGHT:
8649                        return 0.0f;
8650                    case Gravity.CENTER_HORIZONTAL:
8651                    case Gravity.FILL_HORIZONTAL:
8652                        return (mLayout.getLineWidth(0) - ((mRight - mLeft) -
8653                                getCompoundPaddingLeft() - getCompoundPaddingRight())) /
8654                                getHorizontalFadingEdgeLength();
8655                }
8656            }
8657        }
8658        return super.getRightFadingEdgeStrength();
8659    }
8660
8661    @Override
8662    protected int computeHorizontalScrollRange() {
8663        if (mLayout != null) {
8664            return mSingleLine && (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) == Gravity.LEFT ?
8665                    (int) mLayout.getLineWidth(0) : mLayout.getWidth();
8666        }
8667
8668        return super.computeHorizontalScrollRange();
8669    }
8670
8671    @Override
8672    protected int computeVerticalScrollRange() {
8673        if (mLayout != null)
8674            return mLayout.getHeight();
8675
8676        return super.computeVerticalScrollRange();
8677    }
8678
8679    @Override
8680    protected int computeVerticalScrollExtent() {
8681        return getHeight() - getCompoundPaddingTop() - getCompoundPaddingBottom();
8682    }
8683
8684    @Override
8685    public void findViewsWithText(ArrayList<View> outViews, CharSequence searched, int flags) {
8686        super.findViewsWithText(outViews, searched, flags);
8687        if (!outViews.contains(this) && (flags & FIND_VIEWS_WITH_TEXT) != 0
8688                && !TextUtils.isEmpty(searched) && !TextUtils.isEmpty(mText)) {
8689            String searchedLowerCase = searched.toString().toLowerCase();
8690            String textLowerCase = mText.toString().toLowerCase();
8691            if (textLowerCase.contains(searchedLowerCase)) {
8692                outViews.add(this);
8693            }
8694        }
8695    }
8696
8697    public enum BufferType {
8698        NORMAL, SPANNABLE, EDITABLE,
8699    }
8700
8701    /**
8702     * Returns the TextView_textColor attribute from the
8703     * Resources.StyledAttributes, if set, or the TextAppearance_textColor
8704     * from the TextView_textAppearance attribute, if TextView_textColor
8705     * was not set directly.
8706     */
8707    public static ColorStateList getTextColors(Context context, TypedArray attrs) {
8708        ColorStateList colors;
8709        colors = attrs.getColorStateList(com.android.internal.R.styleable.
8710                                         TextView_textColor);
8711
8712        if (colors == null) {
8713            int ap = attrs.getResourceId(com.android.internal.R.styleable.
8714                                         TextView_textAppearance, -1);
8715            if (ap != -1) {
8716                TypedArray appearance;
8717                appearance = context.obtainStyledAttributes(ap,
8718                                            com.android.internal.R.styleable.TextAppearance);
8719                colors = appearance.getColorStateList(com.android.internal.R.styleable.
8720                                                  TextAppearance_textColor);
8721                appearance.recycle();
8722            }
8723        }
8724
8725        return colors;
8726    }
8727
8728    /**
8729     * Returns the default color from the TextView_textColor attribute
8730     * from the AttributeSet, if set, or the default color from the
8731     * TextAppearance_textColor from the TextView_textAppearance attribute,
8732     * if TextView_textColor was not set directly.
8733     */
8734    public static int getTextColor(Context context,
8735                                   TypedArray attrs,
8736                                   int def) {
8737        ColorStateList colors = getTextColors(context, attrs);
8738
8739        if (colors == null) {
8740            return def;
8741        } else {
8742            return colors.getDefaultColor();
8743        }
8744    }
8745
8746    @Override
8747    public boolean onKeyShortcut(int keyCode, KeyEvent event) {
8748        final int filteredMetaState = event.getMetaState() & ~KeyEvent.META_CTRL_MASK;
8749        if (KeyEvent.metaStateHasNoModifiers(filteredMetaState)) {
8750            switch (keyCode) {
8751            case KeyEvent.KEYCODE_A:
8752                if (canSelectText()) {
8753                    return onTextContextMenuItem(ID_SELECT_ALL);
8754                }
8755                break;
8756            case KeyEvent.KEYCODE_X:
8757                if (canCut()) {
8758                    return onTextContextMenuItem(ID_CUT);
8759                }
8760                break;
8761            case KeyEvent.KEYCODE_C:
8762                if (canCopy()) {
8763                    return onTextContextMenuItem(ID_COPY);
8764                }
8765                break;
8766            case KeyEvent.KEYCODE_V:
8767                if (canPaste()) {
8768                    return onTextContextMenuItem(ID_PASTE);
8769                }
8770                break;
8771            }
8772        }
8773        return super.onKeyShortcut(keyCode, event);
8774    }
8775
8776    /**
8777     * Unlike {@link #textCanBeSelected()}, this method is based on the <i>current</i> state of the
8778     * TextView. {@link #textCanBeSelected()} has to be true (this is one of the conditions to have
8779     * a selection controller (see {@link #prepareCursorControllers()}), but this is not sufficient.
8780     */
8781    private boolean canSelectText() {
8782        return hasSelectionController() && mText.length() != 0;
8783    }
8784
8785    /**
8786     * Test based on the <i>intrinsic</i> charateristics of the TextView.
8787     * The text must be spannable and the movement method must allow for arbitary selection.
8788     *
8789     * See also {@link #canSelectText()}.
8790     */
8791    private boolean textCanBeSelected() {
8792        // prepareCursorController() relies on this method.
8793        // If you change this condition, make sure prepareCursorController is called anywhere
8794        // the value of this condition might be changed.
8795        if (mMovement == null || !mMovement.canSelectArbitrarily()) return false;
8796        return isTextEditable() || (mTextIsSelectable && mText instanceof Spannable && isEnabled());
8797    }
8798
8799    private boolean canCut() {
8800        if (hasPasswordTransformationMethod()) {
8801            return false;
8802        }
8803
8804        if (mText.length() > 0 && hasSelection() && mText instanceof Editable && mInput != null) {
8805            return true;
8806        }
8807
8808        return false;
8809    }
8810
8811    private boolean canCopy() {
8812        if (hasPasswordTransformationMethod()) {
8813            return false;
8814        }
8815
8816        if (mText.length() > 0 && hasSelection()) {
8817            return true;
8818        }
8819
8820        return false;
8821    }
8822
8823    private boolean canPaste() {
8824        return (mText instanceof Editable &&
8825                mInput != null &&
8826                getSelectionStart() >= 0 &&
8827                getSelectionEnd() >= 0 &&
8828                ((ClipboardManager)getContext().getSystemService(Context.CLIPBOARD_SERVICE)).
8829                hasPrimaryClip());
8830    }
8831
8832    private static long packRangeInLong(int start, int end) {
8833        return (((long) start) << 32) | end;
8834    }
8835
8836    private static int extractRangeStartFromLong(long range) {
8837        return (int) (range >>> 32);
8838    }
8839
8840    private static int extractRangeEndFromLong(long range) {
8841        return (int) (range & 0x00000000FFFFFFFFL);
8842    }
8843
8844    private boolean selectAll() {
8845        final int length = mText.length();
8846        Selection.setSelection((Spannable) mText, 0, length);
8847        return length > 0;
8848    }
8849
8850    /**
8851     * Adjusts selection to the word under last touch offset.
8852     * Return true if the operation was successfully performed.
8853     */
8854    private boolean selectCurrentWord() {
8855        if (!canSelectText()) {
8856            return false;
8857        }
8858
8859        if (hasPasswordTransformationMethod()) {
8860            // Always select all on a password field.
8861            // Cut/copy menu entries are not available for passwords, but being able to select all
8862            // is however useful to delete or paste to replace the entire content.
8863            return selectAll();
8864        }
8865
8866        int klass = mInputType & InputType.TYPE_MASK_CLASS;
8867        int variation = mInputType & InputType.TYPE_MASK_VARIATION;
8868
8869        // Specific text field types: select the entire text for these
8870        if (klass == InputType.TYPE_CLASS_NUMBER ||
8871                klass == InputType.TYPE_CLASS_PHONE ||
8872                klass == InputType.TYPE_CLASS_DATETIME ||
8873                variation == InputType.TYPE_TEXT_VARIATION_URI ||
8874                variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS ||
8875                variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS ||
8876                variation == InputType.TYPE_TEXT_VARIATION_FILTER) {
8877            return selectAll();
8878        }
8879
8880        long lastTouchOffsets = getLastTouchOffsets();
8881        final int minOffset = extractRangeStartFromLong(lastTouchOffsets);
8882        final int maxOffset = extractRangeEndFromLong(lastTouchOffsets);
8883
8884        // Safety check in case standard touch event handling has been bypassed
8885        if (minOffset < 0 || minOffset >= mText.length()) return false;
8886        if (maxOffset < 0 || maxOffset >= mText.length()) return false;
8887
8888        int selectionStart, selectionEnd;
8889
8890        // If a URLSpan (web address, email, phone...) is found at that position, select it.
8891        URLSpan[] urlSpans = ((Spanned) mText).getSpans(minOffset, maxOffset, URLSpan.class);
8892        if (urlSpans.length >= 1) {
8893            URLSpan urlSpan = urlSpans[0];
8894            selectionStart = ((Spanned) mText).getSpanStart(urlSpan);
8895            selectionEnd = ((Spanned) mText).getSpanEnd(urlSpan);
8896        } else {
8897            final WordIterator wordIterator = getWordIterator();
8898            wordIterator.setCharSequence(mText, minOffset, maxOffset);
8899
8900            selectionStart = wordIterator.getBeginning(minOffset);
8901            if (selectionStart == BreakIterator.DONE) return false;
8902
8903            selectionEnd = wordIterator.getEnd(maxOffset);
8904            if (selectionEnd == BreakIterator.DONE) return false;
8905
8906            if (selectionStart == selectionEnd) {
8907                // Possible when the word iterator does not properly handle the text's language
8908                long range = getCharRange(selectionStart);
8909                selectionStart = extractRangeStartFromLong(range);
8910                selectionEnd = extractRangeEndFromLong(range);
8911            }
8912        }
8913
8914        Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
8915        return selectionEnd > selectionStart;
8916    }
8917
8918    /**
8919     * This is a temporary method. Future versions may support multi-locale text.
8920     *
8921     * @return The current locale used in this TextView, based on the current IME's locale,
8922     * or the system default locale if this is not defined.
8923     * @hide
8924     */
8925    public Locale getLocale() {
8926        Locale locale = Locale.getDefault();
8927        final InputMethodManager imm = InputMethodManager.peekInstance();
8928        if (imm != null) {
8929            final InputMethodSubtype currentInputMethodSubtype = imm.getCurrentInputMethodSubtype();
8930            if (currentInputMethodSubtype != null) {
8931                String localeString = currentInputMethodSubtype.getLocale();
8932                if (!TextUtils.isEmpty(localeString)) {
8933                    locale = new Locale(localeString);
8934                }
8935            }
8936        }
8937        return locale;
8938    }
8939
8940    void onLocaleChanged() {
8941        removeMisspelledSpans((Editable) mText);
8942        // Will be re-created on demand in getWordIterator with the proper new locale
8943        mWordIterator = null;
8944    }
8945
8946    /**
8947     * @hide
8948     */
8949    public WordIterator getWordIterator() {
8950        if (mWordIterator == null) {
8951            mWordIterator = new WordIterator(getLocale());
8952        }
8953        return mWordIterator;
8954    }
8955
8956    private long getCharRange(int offset) {
8957        final int textLength = mText.length();
8958        if (offset + 1 < textLength) {
8959            final char currentChar = mText.charAt(offset);
8960            final char nextChar = mText.charAt(offset + 1);
8961            if (Character.isSurrogatePair(currentChar, nextChar)) {
8962                return packRangeInLong(offset,  offset + 2);
8963            }
8964        }
8965        if (offset < textLength) {
8966            return packRangeInLong(offset,  offset + 1);
8967        }
8968        if (offset - 2 >= 0) {
8969            final char previousChar = mText.charAt(offset - 1);
8970            final char previousPreviousChar = mText.charAt(offset - 2);
8971            if (Character.isSurrogatePair(previousPreviousChar, previousChar)) {
8972                return packRangeInLong(offset - 2,  offset);
8973            }
8974        }
8975        if (offset - 1 >= 0) {
8976            return packRangeInLong(offset - 1,  offset);
8977        }
8978        return packRangeInLong(offset,  offset);
8979    }
8980
8981    private SpellChecker getSpellChecker() {
8982        if (mSpellChecker == null) {
8983            mSpellChecker = new SpellChecker(this);
8984        }
8985        return mSpellChecker;
8986    }
8987
8988    private long getLastTouchOffsets() {
8989        int minOffset, maxOffset;
8990
8991        if (mContextMenuTriggeredByKey) {
8992            minOffset = getSelectionStart();
8993            maxOffset = getSelectionEnd();
8994        } else {
8995            SelectionModifierCursorController selectionController = getSelectionController();
8996            minOffset = selectionController.getMinTouchOffset();
8997            maxOffset = selectionController.getMaxTouchOffset();
8998        }
8999
9000        return packRangeInLong(minOffset, maxOffset);
9001    }
9002
9003    @Override
9004    public void onPopulateAccessibilityEvent(AccessibilityEvent event) {
9005        super.onPopulateAccessibilityEvent(event);
9006
9007        final boolean isPassword = hasPasswordTransformationMethod();
9008        if (!isPassword) {
9009            CharSequence text = getTextForAccessibility();
9010            if (!TextUtils.isEmpty(text)) {
9011                event.getText().add(text);
9012            }
9013        }
9014    }
9015
9016    @Override
9017    public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
9018        super.onInitializeAccessibilityEvent(event);
9019
9020        final boolean isPassword = hasPasswordTransformationMethod();
9021        event.setPassword(isPassword);
9022
9023        if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED) {
9024            event.setFromIndex(Selection.getSelectionStart(mText));
9025            event.setToIndex(Selection.getSelectionEnd(mText));
9026            event.setItemCount(mText.length());
9027        }
9028    }
9029
9030    @Override
9031    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
9032        super.onInitializeAccessibilityNodeInfo(info);
9033
9034        final boolean isPassword = hasPasswordTransformationMethod();
9035        if (!isPassword) {
9036            info.setText(getTextForAccessibility());
9037        }
9038        info.setPassword(isPassword);
9039    }
9040
9041    @Override
9042    public void sendAccessibilityEvent(int eventType) {
9043        // Do not send scroll events since first they are not interesting for
9044        // accessibility and second such events a generated too frequently.
9045        // For details see the implementation of bringTextIntoView().
9046        if (eventType == AccessibilityEvent.TYPE_VIEW_SCROLLED) {
9047            return;
9048        }
9049        super.sendAccessibilityEvent(eventType);
9050    }
9051
9052    /**
9053     * Gets the text reported for accessibility purposes. It is the
9054     * text if not empty or the hint.
9055     *
9056     * @return The accessibility text.
9057     */
9058    private CharSequence getTextForAccessibility() {
9059        CharSequence text = getText();
9060        if (TextUtils.isEmpty(text)) {
9061            text = getHint();
9062        }
9063        return text;
9064    }
9065
9066    void sendAccessibilityEventTypeViewTextChanged(CharSequence beforeText,
9067            int fromIndex, int removedCount, int addedCount) {
9068        AccessibilityEvent event =
9069            AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
9070        event.setFromIndex(fromIndex);
9071        event.setRemovedCount(removedCount);
9072        event.setAddedCount(addedCount);
9073        event.setBeforeText(beforeText);
9074        sendAccessibilityEventUnchecked(event);
9075    }
9076
9077    @Override
9078    protected void onCreateContextMenu(ContextMenu menu) {
9079        super.onCreateContextMenu(menu);
9080        boolean added = false;
9081        mContextMenuTriggeredByKey = mDPadCenterIsDown || mEnterKeyIsDown;
9082        // Problem with context menu on long press: the menu appears while the key in down and when
9083        // the key is released, the view does not receive the key_up event.
9084        // We need two layers of flags: mDPadCenterIsDown and mEnterKeyIsDown are set in key down/up
9085        // events. We cannot simply clear these flags in onTextContextMenuItem since
9086        // it may not be called (if the user/ discards the context menu with the back key).
9087        // We clear these flags here and mContextMenuTriggeredByKey saves that state so that it is
9088        // available in onTextContextMenuItem.
9089        mDPadCenterIsDown = mEnterKeyIsDown = false;
9090
9091        MenuHandler handler = new MenuHandler();
9092
9093        if (mText instanceof Spanned && hasSelectionController()) {
9094            long lastTouchOffset = getLastTouchOffsets();
9095            final int selStart = extractRangeStartFromLong(lastTouchOffset);
9096            final int selEnd = extractRangeEndFromLong(lastTouchOffset);
9097
9098            URLSpan[] urls = ((Spanned) mText).getSpans(selStart, selEnd, URLSpan.class);
9099            if (urls.length > 0) {
9100                menu.add(0, ID_COPY_URL, 0, com.android.internal.R.string.copyUrl).
9101                        setOnMenuItemClickListener(handler);
9102
9103                added = true;
9104            }
9105        }
9106
9107        // The context menu is not empty, which will prevent the selection mode from starting.
9108        // Add a entry to start it in the context menu.
9109        // TODO Does not handle the case where a subclass does not call super.thisMethod or
9110        // populates the menu AFTER this call.
9111        if (menu.size() > 0) {
9112            menu.add(0, ID_SELECTION_MODE, 0, com.android.internal.R.string.selectTextMode).
9113                    setOnMenuItemClickListener(handler);
9114            added = true;
9115        }
9116
9117        if (added) {
9118            menu.setHeaderTitle(com.android.internal.R.string.editTextMenuTitle);
9119        }
9120    }
9121
9122    /**
9123     * Returns whether this text view is a current input method target.  The
9124     * default implementation just checks with {@link InputMethodManager}.
9125     */
9126    public boolean isInputMethodTarget() {
9127        InputMethodManager imm = InputMethodManager.peekInstance();
9128        return imm != null && imm.isActive(this);
9129    }
9130
9131    // Selection context mode
9132    private static final int ID_SELECT_ALL = android.R.id.selectAll;
9133    private static final int ID_CUT = android.R.id.cut;
9134    private static final int ID_COPY = android.R.id.copy;
9135    private static final int ID_PASTE = android.R.id.paste;
9136    // Context menu entries
9137    private static final int ID_COPY_URL = android.R.id.copyUrl;
9138    private static final int ID_SELECTION_MODE = android.R.id.selectTextMode;
9139
9140    private class MenuHandler implements MenuItem.OnMenuItemClickListener {
9141        public boolean onMenuItemClick(MenuItem item) {
9142            return onTextContextMenuItem(item.getItemId());
9143        }
9144    }
9145
9146    /**
9147     * Called when a context menu option for the text view is selected.  Currently
9148     * this will be {@link android.R.id#copyUrl}, {@link android.R.id#selectTextMode},
9149     * {@link android.R.id#selectAll}, {@link android.R.id#paste}, {@link android.R.id#cut}
9150     * or {@link android.R.id#copy}.
9151     *
9152     * @return true if the context menu item action was performed.
9153     */
9154    public boolean onTextContextMenuItem(int id) {
9155        int min = 0;
9156        int max = mText.length();
9157
9158        if (isFocused()) {
9159            final int selStart = getSelectionStart();
9160            final int selEnd = getSelectionEnd();
9161
9162            min = Math.max(0, Math.min(selStart, selEnd));
9163            max = Math.max(0, Math.max(selStart, selEnd));
9164        }
9165
9166        switch (id) {
9167            case ID_COPY_URL:
9168                URLSpan[] urls = ((Spanned) mText).getSpans(min, max, URLSpan.class);
9169                if (urls.length >= 1) {
9170                    ClipData clip = null;
9171                    for (int i=0; i<urls.length; i++) {
9172                        Uri uri = Uri.parse(urls[0].getURL());
9173                        if (clip == null) {
9174                            clip = ClipData.newRawUri(null, uri);
9175                        } else {
9176                            clip.addItem(new ClipData.Item(uri));
9177                        }
9178                    }
9179                    if (clip != null) {
9180                        setPrimaryClip(clip);
9181                    }
9182                }
9183                stopSelectionActionMode();
9184                return true;
9185
9186            case ID_SELECTION_MODE:
9187                if (mSelectionActionMode != null) {
9188                    // Selection mode is already started, simply change selected part.
9189                    selectCurrentWord();
9190                } else {
9191                    startSelectionActionMode();
9192                }
9193                return true;
9194
9195            case ID_SELECT_ALL:
9196                // This does not enter text selection mode. Text is highlighted, so that it can be
9197                // bulk edited, like selectAllOnFocus does. Returns true even if text is empty.
9198                selectAll();
9199                return true;
9200
9201            case ID_PASTE:
9202                paste(min, max);
9203                return true;
9204
9205            case ID_CUT:
9206                setPrimaryClip(ClipData.newPlainText(null, getTransformedText(min, max)));
9207                ((Editable) mText).delete(min, max);
9208                stopSelectionActionMode();
9209                return true;
9210
9211            case ID_COPY:
9212                setPrimaryClip(ClipData.newPlainText(null, getTransformedText(min, max)));
9213                stopSelectionActionMode();
9214                return true;
9215        }
9216        return false;
9217    }
9218
9219    private CharSequence getTransformedText(int start, int end) {
9220        return removeSuggestionSpans(mTransformed.subSequence(start, end));
9221    }
9222
9223    /**
9224     * Prepare text so that there are not zero or two spaces at beginning and end of region defined
9225     * by [min, max] when replacing this region by paste.
9226     * Note that if there were two spaces (or more) at that position before, they are kept. We just
9227     * make sure we do not add an extra one from the paste content.
9228     */
9229    private long prepareSpacesAroundPaste(int min, int max, CharSequence paste) {
9230        if (paste.length() > 0) {
9231            if (min > 0) {
9232                final char charBefore = mTransformed.charAt(min - 1);
9233                final char charAfter = paste.charAt(0);
9234
9235                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
9236                    // Two spaces at beginning of paste: remove one
9237                    final int originalLength = mText.length();
9238                    ((Editable) mText).delete(min - 1, min);
9239                    // Due to filters, there is no guarantee that exactly one character was
9240                    // removed: count instead.
9241                    final int delta = mText.length() - originalLength;
9242                    min += delta;
9243                    max += delta;
9244                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
9245                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
9246                    // No space at beginning of paste: add one
9247                    final int originalLength = mText.length();
9248                    ((Editable) mText).replace(min, min, " ");
9249                    // Taking possible filters into account as above.
9250                    final int delta = mText.length() - originalLength;
9251                    min += delta;
9252                    max += delta;
9253                }
9254            }
9255
9256            if (max < mText.length()) {
9257                final char charBefore = paste.charAt(paste.length() - 1);
9258                final char charAfter = mTransformed.charAt(max);
9259
9260                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
9261                    // Two spaces at end of paste: remove one
9262                    ((Editable) mText).delete(max, max + 1);
9263                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
9264                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
9265                    // No space at end of paste: add one
9266                    ((Editable) mText).replace(max, max, " ");
9267                }
9268            }
9269        }
9270
9271        return packRangeInLong(min, max);
9272    }
9273
9274    private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) {
9275        TextView shadowView = (TextView) inflate(mContext,
9276                com.android.internal.R.layout.text_drag_thumbnail, null);
9277
9278        if (shadowView == null) {
9279            throw new IllegalArgumentException("Unable to inflate text drag thumbnail");
9280        }
9281
9282        if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) {
9283            text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH);
9284        }
9285        shadowView.setText(text);
9286        shadowView.setTextColor(getTextColors());
9287
9288        shadowView.setTextAppearance(mContext, R.styleable.Theme_textAppearanceLarge);
9289        shadowView.setGravity(Gravity.CENTER);
9290
9291        shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
9292                ViewGroup.LayoutParams.WRAP_CONTENT));
9293
9294        final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
9295        shadowView.measure(size, size);
9296
9297        shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight());
9298        shadowView.invalidate();
9299        return new DragShadowBuilder(shadowView);
9300    }
9301
9302    private static class DragLocalState {
9303        public TextView sourceTextView;
9304        public int start, end;
9305
9306        public DragLocalState(TextView sourceTextView, int start, int end) {
9307            this.sourceTextView = sourceTextView;
9308            this.start = start;
9309            this.end = end;
9310        }
9311    }
9312
9313    @Override
9314    public boolean performLongClick() {
9315        boolean handled = false;
9316        boolean vibrate = true;
9317
9318        if (super.performLongClick()) {
9319            mDiscardNextActionUp = true;
9320            handled = true;
9321        }
9322
9323        // Long press in empty space moves cursor and shows the Paste affordance if available.
9324        if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) &&
9325                mInsertionControllerEnabled) {
9326            final int offset = getOffsetForPosition(mLastDownPositionX, mLastDownPositionY);
9327            stopSelectionActionMode();
9328            Selection.setSelection((Spannable) mText, offset);
9329            getInsertionController().showWithActionPopup();
9330            handled = true;
9331            vibrate = false;
9332        }
9333
9334        if (!handled && mSelectionActionMode != null) {
9335            if (touchPositionIsInSelection()) {
9336                // Start a drag
9337                final int start = getSelectionStart();
9338                final int end = getSelectionEnd();
9339                CharSequence selectedText = getTransformedText(start, end);
9340                ClipData data = ClipData.newPlainText(null, selectedText);
9341                DragLocalState localState = new DragLocalState(this, start, end);
9342                startDrag(data, getTextThumbnailBuilder(selectedText), localState, 0);
9343                stopSelectionActionMode();
9344            } else {
9345                getSelectionController().hide();
9346                selectCurrentWord();
9347                getSelectionController().show();
9348            }
9349            handled = true;
9350        }
9351
9352        // Start a new selection
9353        if (!handled) {
9354            vibrate = handled = startSelectionActionMode();
9355        }
9356
9357        if (vibrate) {
9358            performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
9359        }
9360
9361        if (handled) {
9362            mDiscardNextActionUp = true;
9363        }
9364
9365        return handled;
9366    }
9367
9368    private boolean touchPositionIsInSelection() {
9369        int selectionStart = getSelectionStart();
9370        int selectionEnd = getSelectionEnd();
9371
9372        if (selectionStart == selectionEnd) {
9373            return false;
9374        }
9375
9376        if (selectionStart > selectionEnd) {
9377            int tmp = selectionStart;
9378            selectionStart = selectionEnd;
9379            selectionEnd = tmp;
9380            Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
9381        }
9382
9383        SelectionModifierCursorController selectionController = getSelectionController();
9384        int minOffset = selectionController.getMinTouchOffset();
9385        int maxOffset = selectionController.getMaxTouchOffset();
9386
9387        return ((minOffset >= selectionStart) && (maxOffset < selectionEnd));
9388    }
9389
9390    private PositionListener getPositionListener() {
9391        if (mPositionListener == null) {
9392            mPositionListener = new PositionListener();
9393        }
9394        return mPositionListener;
9395    }
9396
9397    private interface TextViewPositionListener {
9398        public void updatePosition(int parentPositionX, int parentPositionY,
9399                boolean parentPositionChanged, boolean parentScrolled);
9400    }
9401
9402    private class PositionListener implements ViewTreeObserver.OnPreDrawListener {
9403        // 3 handles
9404        // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others)
9405        private final int MAXIMUM_NUMBER_OF_LISTENERS = 6;
9406        private TextViewPositionListener[] mPositionListeners =
9407                new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS];
9408        private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS];
9409        private boolean mPositionHasChanged = true;
9410        // Absolute position of the TextView with respect to its parent window
9411        private int mPositionX, mPositionY;
9412        private int mNumberOfListeners;
9413        private boolean mScrollHasChanged;
9414
9415        public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) {
9416            if (mNumberOfListeners == 0) {
9417                updatePosition();
9418                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
9419                vto.addOnPreDrawListener(this);
9420            }
9421
9422            int emptySlotIndex = -1;
9423            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
9424                TextViewPositionListener listener = mPositionListeners[i];
9425                if (listener == positionListener) {
9426                    return;
9427                } else if (emptySlotIndex < 0 && listener == null) {
9428                    emptySlotIndex = i;
9429                }
9430            }
9431
9432            mPositionListeners[emptySlotIndex] = positionListener;
9433            mCanMove[emptySlotIndex] = canMove;
9434            mNumberOfListeners++;
9435        }
9436
9437        public void removeSubscriber(TextViewPositionListener positionListener) {
9438            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
9439                if (mPositionListeners[i] == positionListener) {
9440                    mPositionListeners[i] = null;
9441                    mNumberOfListeners--;
9442                    break;
9443                }
9444            }
9445
9446            if (mNumberOfListeners == 0) {
9447                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
9448                vto.removeOnPreDrawListener(this);
9449            }
9450        }
9451
9452        public int getPositionX() {
9453            return mPositionX;
9454        }
9455
9456        public int getPositionY() {
9457            return mPositionY;
9458        }
9459
9460        @Override
9461        public boolean onPreDraw() {
9462            updatePosition();
9463
9464            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
9465                if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) {
9466                    TextViewPositionListener positionListener = mPositionListeners[i];
9467                    if (positionListener != null) {
9468                        positionListener.updatePosition(mPositionX, mPositionY,
9469                                mPositionHasChanged, mScrollHasChanged);
9470                    }
9471                }
9472            }
9473
9474            mScrollHasChanged = false;
9475            return true;
9476        }
9477
9478        private void updatePosition() {
9479            TextView.this.getLocationInWindow(mTempCoords);
9480
9481            mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY;
9482
9483            mPositionX = mTempCoords[0];
9484            mPositionY = mTempCoords[1];
9485        }
9486
9487        public boolean isVisible(int positionX, int positionY) {
9488            final TextView textView = TextView.this;
9489
9490            if (mTempRect == null) mTempRect = new Rect();
9491            final Rect clip = mTempRect;
9492            clip.left = getCompoundPaddingLeft();
9493            clip.top = getExtendedPaddingTop();
9494            clip.right = textView.getWidth() - getCompoundPaddingRight();
9495            clip.bottom = textView.getHeight() - getExtendedPaddingBottom();
9496
9497            final ViewParent parent = textView.getParent();
9498            if (parent == null || !parent.getChildVisibleRect(textView, clip, null)) {
9499                return false;
9500            }
9501
9502            int posX = mPositionX + positionX;
9503            int posY = mPositionY + positionY;
9504
9505            // Offset by 1 to take into account 0.5 and int rounding around getPrimaryHorizontal.
9506            return posX >= clip.left - 1 && posX <= clip.right + 1 &&
9507                    posY >= clip.top && posY <= clip.bottom;
9508        }
9509
9510        public boolean isOffsetVisible(int offset) {
9511            final int line = mLayout.getLineForOffset(offset);
9512            final int lineBottom = mLayout.getLineBottom(line);
9513            final int primaryHorizontal = (int) mLayout.getPrimaryHorizontal(offset);
9514            return isVisible(primaryHorizontal + viewportToContentHorizontalOffset(),
9515                    lineBottom + viewportToContentVerticalOffset());
9516        }
9517
9518        public void onScrollChanged() {
9519            mScrollHasChanged = true;
9520        }
9521    }
9522
9523    @Override
9524    protected void onScrollChanged(int horiz, int vert, int oldHoriz, int oldVert) {
9525        super.onScrollChanged(horiz, vert, oldHoriz, oldVert);
9526        if (mPositionListener != null) {
9527            mPositionListener.onScrollChanged();
9528        }
9529    }
9530
9531    private abstract class PinnedPopupWindow implements TextViewPositionListener {
9532        protected PopupWindow mPopupWindow;
9533        protected ViewGroup mContentView;
9534        int mPositionX, mPositionY;
9535
9536        protected abstract void createPopupWindow();
9537        protected abstract void initContentView();
9538        protected abstract int getTextOffset();
9539        protected abstract int getVerticalLocalPosition(int line);
9540        protected abstract int clipVertically(int positionY);
9541
9542        public PinnedPopupWindow() {
9543            createPopupWindow();
9544
9545            mPopupWindow.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
9546            mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
9547            mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
9548
9549            initContentView();
9550
9551            LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
9552                    ViewGroup.LayoutParams.WRAP_CONTENT);
9553            mContentView.setLayoutParams(wrapContent);
9554
9555            mPopupWindow.setContentView(mContentView);
9556        }
9557
9558        public void show() {
9559            TextView.this.getPositionListener().addSubscriber(this, false /* offset is fixed */);
9560
9561            computeLocalPosition();
9562
9563            final PositionListener positionListener = TextView.this.getPositionListener();
9564            updatePosition(positionListener.getPositionX(), positionListener.getPositionY());
9565        }
9566
9567        protected void measureContent() {
9568            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9569            mContentView.measure(
9570                    View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels,
9571                            View.MeasureSpec.AT_MOST),
9572                    View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels,
9573                            View.MeasureSpec.AT_MOST));
9574        }
9575
9576        /* The popup window will be horizontally centered on the getTextOffset() and vertically
9577         * positioned according to viewportToContentHorizontalOffset.
9578         *
9579         * This method assumes that mContentView has properly been measured from its content. */
9580        private void computeLocalPosition() {
9581            measureContent();
9582            final int width = mContentView.getMeasuredWidth();
9583            final int offset = getTextOffset();
9584            mPositionX = (int) (mLayout.getPrimaryHorizontal(offset) - width / 2.0f);
9585            mPositionX += viewportToContentHorizontalOffset();
9586
9587            final int line = mLayout.getLineForOffset(offset);
9588            mPositionY = getVerticalLocalPosition(line);
9589            mPositionY += viewportToContentVerticalOffset();
9590        }
9591
9592        private void updatePosition(int parentPositionX, int parentPositionY) {
9593            int positionX = parentPositionX + mPositionX;
9594            int positionY = parentPositionY + mPositionY;
9595
9596            positionY = clipVertically(positionY);
9597
9598            // Horizontal clipping
9599            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9600            final int width = mContentView.getMeasuredWidth();
9601            positionX = Math.min(displayMetrics.widthPixels - width, positionX);
9602            positionX = Math.max(0, positionX);
9603
9604            if (isShowing()) {
9605                mPopupWindow.update(positionX, positionY, -1, -1);
9606            } else {
9607                mPopupWindow.showAtLocation(TextView.this, Gravity.NO_GRAVITY,
9608                        positionX, positionY);
9609            }
9610        }
9611
9612        public void hide() {
9613            mPopupWindow.dismiss();
9614            TextView.this.getPositionListener().removeSubscriber(this);
9615        }
9616
9617        @Override
9618        public void updatePosition(int parentPositionX, int parentPositionY,
9619                boolean parentPositionChanged, boolean parentScrolled) {
9620            // Either parentPositionChanged or parentScrolled is true, check if still visible
9621            if (isShowing() && getPositionListener().isOffsetVisible(getTextOffset())) {
9622                if (parentScrolled) computeLocalPosition();
9623                updatePosition(parentPositionX, parentPositionY);
9624            } else {
9625                hide();
9626            }
9627        }
9628
9629        public boolean isShowing() {
9630            return mPopupWindow.isShowing();
9631        }
9632    }
9633
9634    private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener {
9635        private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE;
9636        private static final int ADD_TO_DICTIONARY = -1;
9637        private static final int DELETE_TEXT = -2;
9638        private SuggestionInfo[] mSuggestionInfos;
9639        private int mNumberOfSuggestions;
9640        private boolean mCursorWasVisibleBeforeSuggestions;
9641        private boolean mIsShowingUp = false;
9642        private SuggestionAdapter mSuggestionsAdapter;
9643        private final Comparator<SuggestionSpan> mSuggestionSpanComparator;
9644        private final HashMap<SuggestionSpan, Integer> mSpansLengths;
9645
9646        private class CustomPopupWindow extends PopupWindow {
9647            public CustomPopupWindow(Context context, int defStyle) {
9648                super(context, null, defStyle);
9649            }
9650
9651            @Override
9652            public void dismiss() {
9653                super.dismiss();
9654
9655                TextView.this.getPositionListener().removeSubscriber(SuggestionsPopupWindow.this);
9656
9657                // Safe cast since show() checks that mText is an Editable
9658                ((Spannable) mText).removeSpan(mSuggestionRangeSpan);
9659
9660                setCursorVisible(mCursorWasVisibleBeforeSuggestions);
9661                if (hasInsertionController()) {
9662                    getInsertionController().show();
9663                }
9664            }
9665        }
9666
9667        public SuggestionsPopupWindow() {
9668            mCursorWasVisibleBeforeSuggestions = mCursorVisible;
9669            mSuggestionSpanComparator = new SuggestionSpanComparator();
9670            mSpansLengths = new HashMap<SuggestionSpan, Integer>();
9671        }
9672
9673        @Override
9674        protected void createPopupWindow() {
9675            mPopupWindow = new CustomPopupWindow(TextView.this.mContext,
9676                com.android.internal.R.attr.textSuggestionsWindowStyle);
9677            mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
9678            mPopupWindow.setFocusable(true);
9679            mPopupWindow.setClippingEnabled(false);
9680        }
9681
9682        @Override
9683        protected void initContentView() {
9684            ListView listView = new ListView(TextView.this.getContext());
9685            mSuggestionsAdapter = new SuggestionAdapter();
9686            listView.setAdapter(mSuggestionsAdapter);
9687            listView.setOnItemClickListener(this);
9688            mContentView = listView;
9689
9690            // Inflate the suggestion items once and for all. + 2 for add to dictionary and delete
9691            mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS + 2];
9692            for (int i = 0; i < mSuggestionInfos.length; i++) {
9693                mSuggestionInfos[i] = new SuggestionInfo();
9694            }
9695        }
9696
9697        public boolean isShowingUp() {
9698            return mIsShowingUp;
9699        }
9700
9701        public void onParentLostFocus() {
9702            mIsShowingUp = false;
9703        }
9704
9705        private class SuggestionInfo {
9706            int suggestionStart, suggestionEnd; // range of actual suggestion within text
9707            SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents
9708            int suggestionIndex; // the index of this suggestion inside suggestionSpan
9709            SpannableStringBuilder text = new SpannableStringBuilder();
9710            TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mContext,
9711                    android.R.style.TextAppearance_SuggestionHighlight);
9712        }
9713
9714        private class SuggestionAdapter extends BaseAdapter {
9715            private LayoutInflater mInflater = (LayoutInflater) TextView.this.mContext.
9716                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
9717
9718            @Override
9719            public int getCount() {
9720                return mNumberOfSuggestions;
9721            }
9722
9723            @Override
9724            public Object getItem(int position) {
9725                return mSuggestionInfos[position];
9726            }
9727
9728            @Override
9729            public long getItemId(int position) {
9730                return position;
9731            }
9732
9733            @Override
9734            public View getView(int position, View convertView, ViewGroup parent) {
9735                TextView textView = (TextView) convertView;
9736
9737                if (textView == null) {
9738                    textView = (TextView) mInflater.inflate(mTextEditSuggestionItemLayout, parent,
9739                            false);
9740                }
9741
9742                final SuggestionInfo suggestionInfo = mSuggestionInfos[position];
9743                textView.setText(suggestionInfo.text);
9744
9745                if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) {
9746                    textView.setCompoundDrawablesWithIntrinsicBounds(
9747                            com.android.internal.R.drawable.ic_suggestions_add, 0, 0, 0);
9748                } else if (suggestionInfo.suggestionIndex == DELETE_TEXT) {
9749                    textView.setCompoundDrawablesWithIntrinsicBounds(
9750                            com.android.internal.R.drawable.ic_suggestions_delete, 0, 0, 0);
9751                } else {
9752                    textView.setCompoundDrawables(null, null, null, null);
9753                }
9754
9755                return textView;
9756            }
9757        }
9758
9759        private class SuggestionSpanComparator implements Comparator<SuggestionSpan> {
9760            public int compare(SuggestionSpan span1, SuggestionSpan span2) {
9761                final int flag1 = span1.getFlags();
9762                final int flag2 = span2.getFlags();
9763                if (flag1 != flag2) {
9764                    // The order here should match what is used in updateDrawState
9765                    final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0;
9766                    final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0;
9767                    final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0;
9768                    final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0;
9769                    if (easy1 && !misspelled1) return -1;
9770                    if (easy2 && !misspelled2) return 1;
9771                    if (misspelled1) return -1;
9772                    if (misspelled2) return 1;
9773                }
9774
9775                return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue();
9776            }
9777        }
9778
9779        /**
9780         * Returns the suggestion spans that cover the current cursor position. The suggestion
9781         * spans are sorted according to the length of text that they are attached to.
9782         */
9783        private SuggestionSpan[] getSuggestionSpans() {
9784            int pos = TextView.this.getSelectionStart();
9785            Spannable spannable = (Spannable) TextView.this.mText;
9786            SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class);
9787
9788            mSpansLengths.clear();
9789            for (SuggestionSpan suggestionSpan : suggestionSpans) {
9790                int start = spannable.getSpanStart(suggestionSpan);
9791                int end = spannable.getSpanEnd(suggestionSpan);
9792                mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start));
9793            }
9794
9795            // The suggestions are sorted according to their types (easy correction first, then
9796            // misspelled) and to the length of the text that they cover (shorter first).
9797            Arrays.sort(suggestionSpans, mSuggestionSpanComparator);
9798            return suggestionSpans;
9799        }
9800
9801        @Override
9802        public void show() {
9803            if (!(mText instanceof Editable)) return;
9804
9805            updateSuggestions();
9806            mCursorWasVisibleBeforeSuggestions = mCursorVisible;
9807            setCursorVisible(false);
9808            mIsShowingUp = true;
9809            super.show();
9810        }
9811
9812        @Override
9813        protected void measureContent() {
9814            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9815            final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec(
9816                    displayMetrics.widthPixels, View.MeasureSpec.AT_MOST);
9817            final int verticalMeasure = View.MeasureSpec.makeMeasureSpec(
9818                    displayMetrics.heightPixels, View.MeasureSpec.AT_MOST);
9819
9820            int width = 0;
9821            View view = null;
9822            for (int i = 0; i < mNumberOfSuggestions; i++) {
9823                view = mSuggestionsAdapter.getView(i, view, mContentView);
9824                view.getLayoutParams().width = LayoutParams.WRAP_CONTENT;
9825                view.measure(horizontalMeasure, verticalMeasure);
9826                width = Math.max(width, view.getMeasuredWidth());
9827            }
9828
9829            // Enforce the width based on actual text widths
9830            mContentView.measure(
9831                    View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY),
9832                    verticalMeasure);
9833
9834            Drawable popupBackground = mPopupWindow.getBackground();
9835            if (popupBackground != null) {
9836                if (mTempRect == null) mTempRect = new Rect();
9837                popupBackground.getPadding(mTempRect);
9838                width += mTempRect.left + mTempRect.right;
9839            }
9840            mPopupWindow.setWidth(width);
9841        }
9842
9843        @Override
9844        protected int getTextOffset() {
9845            return getSelectionStart();
9846        }
9847
9848        @Override
9849        protected int getVerticalLocalPosition(int line) {
9850            return mLayout.getLineBottom(line);
9851        }
9852
9853        @Override
9854        protected int clipVertically(int positionY) {
9855            final int height = mContentView.getMeasuredHeight();
9856            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9857            return Math.min(positionY, displayMetrics.heightPixels - height);
9858        }
9859
9860        @Override
9861        public void hide() {
9862            super.hide();
9863        }
9864
9865        private void updateSuggestions() {
9866            Spannable spannable = (Spannable) TextView.this.mText;
9867            SuggestionSpan[] suggestionSpans = getSuggestionSpans();
9868
9869            final int nbSpans = suggestionSpans.length;
9870
9871            mNumberOfSuggestions = 0;
9872            int spanUnionStart = mText.length();
9873            int spanUnionEnd = 0;
9874
9875            SuggestionSpan misspelledSpan = null;
9876            int underlineColor = 0;
9877
9878            for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) {
9879                SuggestionSpan suggestionSpan = suggestionSpans[spanIndex];
9880                final int spanStart = spannable.getSpanStart(suggestionSpan);
9881                final int spanEnd = spannable.getSpanEnd(suggestionSpan);
9882                spanUnionStart = Math.min(spanStart, spanUnionStart);
9883                spanUnionEnd = Math.max(spanEnd, spanUnionEnd);
9884
9885                if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) {
9886                    misspelledSpan = suggestionSpan;
9887                }
9888
9889                // The first span dictates the background color of the highlighted text
9890                if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor();
9891
9892                String[] suggestions = suggestionSpan.getSuggestions();
9893                int nbSuggestions = suggestions.length;
9894                for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) {
9895                    SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions];
9896                    suggestionInfo.suggestionSpan = suggestionSpan;
9897                    suggestionInfo.suggestionIndex = suggestionIndex;
9898                    suggestionInfo.text.replace(0, suggestionInfo.text.length(),
9899                            suggestions[suggestionIndex]);
9900
9901                    mNumberOfSuggestions++;
9902                    if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) {
9903                        // Also end outer for loop
9904                        spanIndex = nbSpans;
9905                        break;
9906                    }
9907                }
9908            }
9909
9910            for (int i = 0; i < mNumberOfSuggestions; i++) {
9911                highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd);
9912            }
9913
9914            // Add to dictionary item is there a span with the misspelled flag
9915            if (misspelledSpan != null) {
9916                final int misspelledStart = spannable.getSpanStart(misspelledSpan);
9917                final int misspelledEnd = spannable.getSpanEnd(misspelledSpan);
9918                if (misspelledStart >= 0 && misspelledEnd > misspelledStart) {
9919                    SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions];
9920                    suggestionInfo.suggestionSpan = misspelledSpan;
9921                    suggestionInfo.suggestionIndex = ADD_TO_DICTIONARY;
9922                    suggestionInfo.text.replace(0, suggestionInfo.text.length(),
9923                            getContext().getString(com.android.internal.R.string.addToDictionary));
9924                    suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0,
9925                            Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9926
9927                    mNumberOfSuggestions++;
9928                }
9929            }
9930
9931            // Delete item
9932            SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions];
9933            suggestionInfo.suggestionSpan = null;
9934            suggestionInfo.suggestionIndex = DELETE_TEXT;
9935            suggestionInfo.text.replace(0, suggestionInfo.text.length(),
9936                    getContext().getString(com.android.internal.R.string.deleteText));
9937            suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0,
9938                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9939            mNumberOfSuggestions++;
9940
9941            if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan();
9942            if (underlineColor == 0) {
9943                // Fallback on the default highlight color when the first span does not provide one
9944                mSuggestionRangeSpan.setBackgroundColor(mHighlightColor);
9945            } else {
9946                final float BACKGROUND_TRANSPARENCY = 0.4f;
9947                final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY);
9948                mSuggestionRangeSpan.setBackgroundColor(
9949                        (underlineColor & 0x00FFFFFF) + (newAlpha << 24));
9950            }
9951            spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd,
9952                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9953
9954            mSuggestionsAdapter.notifyDataSetChanged();
9955        }
9956
9957        private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart,
9958                int unionEnd) {
9959            final Spannable text = (Spannable) mText;
9960            final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan);
9961            final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan);
9962
9963            // Adjust the start/end of the suggestion span
9964            suggestionInfo.suggestionStart = spanStart - unionStart;
9965            suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart
9966                    + suggestionInfo.text.length();
9967
9968            suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0,
9969                    suggestionInfo.text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9970
9971            // Add the text before and after the span.
9972            suggestionInfo.text.insert(0, mText.toString().substring(unionStart, spanStart));
9973            suggestionInfo.text.append(mText.toString().substring(spanEnd, unionEnd));
9974        }
9975
9976        @Override
9977        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
9978            TextView textView = (TextView) view;
9979            Editable editable = (Editable) mText;
9980
9981            SuggestionInfo suggestionInfo = mSuggestionInfos[position];
9982
9983            if (suggestionInfo.suggestionIndex == DELETE_TEXT) {
9984                final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan);
9985                int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan);
9986                if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) {
9987                    // Do not leave two adjacent spaces after deletion, or one at beginning of text
9988                    if (spanUnionEnd < editable.length() &&
9989                            Character.isSpaceChar(editable.charAt(spanUnionEnd)) &&
9990                            (spanUnionStart == 0 ||
9991                            Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) {
9992                        spanUnionEnd = spanUnionEnd + 1;
9993                    }
9994                    editable.replace(spanUnionStart, spanUnionEnd, "");
9995                }
9996                hide();
9997                return;
9998            }
9999
10000            final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan);
10001            final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan);
10002            if (spanStart < 0 || spanEnd < 0) {
10003                // Span has been removed
10004                hide();
10005                return;
10006            }
10007            final String originalText = mText.toString().substring(spanStart, spanEnd);
10008
10009            if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) {
10010                Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT);
10011                intent.putExtra("word", originalText);
10012                intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK);
10013                getContext().startActivity(intent);
10014                // There is no way to know if the word was indeed added. Re-check.
10015                editable.removeSpan(suggestionInfo.suggestionSpan);
10016                updateSpellCheckSpans(spanStart, spanEnd);
10017            } else {
10018                // SuggestionSpans are removed by replace: save them before
10019                SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd,
10020                        SuggestionSpan.class);
10021                final int length = suggestionSpans.length;
10022                int[] suggestionSpansStarts = new int[length];
10023                int[] suggestionSpansEnds = new int[length];
10024                int[] suggestionSpansFlags = new int[length];
10025                for (int i = 0; i < length; i++) {
10026                    final SuggestionSpan suggestionSpan = suggestionSpans[i];
10027                    suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan);
10028                    suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan);
10029                    suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan);
10030
10031                    // Remove potential misspelled flags
10032                    int suggestionSpanFlags = suggestionSpan.getFlags();
10033                    if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) {
10034                        suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED;
10035                        suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT;
10036                        suggestionSpan.setFlags(suggestionSpanFlags);
10037                    }
10038                }
10039
10040                final int suggestionStart = suggestionInfo.suggestionStart;
10041                final int suggestionEnd = suggestionInfo.suggestionEnd;
10042                final String suggestion = textView.getText().subSequence(
10043                        suggestionStart, suggestionEnd).toString();
10044                editable.replace(spanStart, spanEnd, suggestion);
10045
10046                // Notify source IME of the suggestion pick. Do this before swaping texts.
10047                if (!TextUtils.isEmpty(
10048                        suggestionInfo.suggestionSpan.getNotificationTargetClassName())) {
10049                    InputMethodManager imm = InputMethodManager.peekInstance();
10050                    if (imm != null) {
10051                        imm.notifySuggestionPicked(suggestionInfo.suggestionSpan, originalText,
10052                                suggestionInfo.suggestionIndex);
10053                    }
10054                }
10055
10056                // Swap text content between actual text and Suggestion span
10057                String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions();
10058                suggestions[suggestionInfo.suggestionIndex] = originalText;
10059
10060                // Restore previous SuggestionSpans
10061                final int lengthDifference = suggestion.length() - (spanEnd - spanStart);
10062                for (int i = 0; i < length; i++) {
10063                    // Only spans that include the modified region make sense after replacement
10064                    // Spans partially included in the replaced region are removed, there is no
10065                    // way to assign them a valid range after replacement
10066                    if (suggestionSpansStarts[i] <= spanStart &&
10067                            suggestionSpansEnds[i] >= spanEnd) {
10068                        editable.setSpan(suggestionSpans[i], suggestionSpansStarts[i],
10069                                suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]);
10070                    }
10071                }
10072
10073                // Move cursor at the end of the replaced word
10074                Selection.setSelection(editable, spanEnd + lengthDifference);
10075            }
10076
10077            hide();
10078        }
10079    }
10080
10081    /**
10082     * Removes the suggestion spans.
10083     */
10084    CharSequence removeSuggestionSpans(CharSequence text) {
10085       if (text instanceof Spanned) {
10086           Spannable spannable;
10087           if (text instanceof Spannable) {
10088               spannable = (Spannable) text;
10089           } else {
10090               spannable = new SpannableString(text);
10091               text = spannable;
10092           }
10093
10094           SuggestionSpan[] spans = spannable.getSpans(0, text.length(), SuggestionSpan.class);
10095           for (int i = 0; i < spans.length; i++) {
10096               spannable.removeSpan(spans[i]);
10097           }
10098       }
10099       return text;
10100    }
10101
10102    void showSuggestions() {
10103        if (mSuggestionsPopupWindow == null) {
10104            mSuggestionsPopupWindow = new SuggestionsPopupWindow();
10105        }
10106        hideControllers();
10107        mSuggestionsPopupWindow.show();
10108    }
10109
10110    boolean areSuggestionsShown() {
10111        return mSuggestionsPopupWindow != null && mSuggestionsPopupWindow.isShowing();
10112    }
10113
10114    /**
10115     * Return whether or not suggestions are enabled on this TextView. The suggestions are generated
10116     * by the IME or by the spell checker as the user types. This is done by adding
10117     * {@link SuggestionSpan}s to the text.
10118     *
10119     * When suggestions are enabled (default), this list of suggestions will be displayed when the
10120     * user asks for them on these parts of the text. This value depends on the inputType of this
10121     * TextView.
10122     *
10123     * The class of the input type must be {@link InputType#TYPE_CLASS_TEXT}.
10124     *
10125     * In addition, the type variation must be one of
10126     * {@link InputType#TYPE_TEXT_VARIATION_NORMAL},
10127     * {@link InputType#TYPE_TEXT_VARIATION_EMAIL_SUBJECT},
10128     * {@link InputType#TYPE_TEXT_VARIATION_LONG_MESSAGE},
10129     * {@link InputType#TYPE_TEXT_VARIATION_SHORT_MESSAGE} or
10130     * {@link InputType#TYPE_TEXT_VARIATION_WEB_EDIT_TEXT}.
10131     *
10132     * And finally, the {@link InputType#TYPE_TEXT_FLAG_NO_SUGGESTIONS} flag must <i>not</i> be set.
10133     *
10134     * @return true if the suggestions popup window is enabled, based on the inputType.
10135     */
10136    public boolean isSuggestionsEnabled() {
10137        if ((mInputType & InputType.TYPE_MASK_CLASS) != InputType.TYPE_CLASS_TEXT) return false;
10138        if ((mInputType & InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS) > 0) return false;
10139
10140        final int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
10141        return (variation == EditorInfo.TYPE_TEXT_VARIATION_NORMAL ||
10142                variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT ||
10143                variation == EditorInfo.TYPE_TEXT_VARIATION_LONG_MESSAGE ||
10144                variation == EditorInfo.TYPE_TEXT_VARIATION_SHORT_MESSAGE ||
10145                variation == EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT);
10146    }
10147
10148    /**
10149     * If provided, this ActionMode.Callback will be used to create the ActionMode when text
10150     * selection is initiated in this View.
10151     *
10152     * The standard implementation populates the menu with a subset of Select All, Cut, Copy and
10153     * Paste actions, depending on what this View supports.
10154     *
10155     * A custom implementation can add new entries in the default menu in its
10156     * {@link android.view.ActionMode.Callback#onPrepareActionMode(ActionMode, Menu)} method. The
10157     * default actions can also be removed from the menu using {@link Menu#removeItem(int)} and
10158     * passing {@link android.R.id#selectAll}, {@link android.R.id#cut}, {@link android.R.id#copy}
10159     * or {@link android.R.id#paste} ids as parameters.
10160     *
10161     * Returning false from
10162     * {@link android.view.ActionMode.Callback#onCreateActionMode(ActionMode, Menu)} will prevent
10163     * the action mode from being started.
10164     *
10165     * Action click events should be handled by the custom implementation of
10166     * {@link android.view.ActionMode.Callback#onActionItemClicked(ActionMode, MenuItem)}.
10167     *
10168     * Note that text selection mode is not started when a TextView receives focus and the
10169     * {@link android.R.attr#selectAllOnFocus} flag has been set. The content is highlighted in
10170     * that case, to allow for quick replacement.
10171     */
10172    public void setCustomSelectionActionModeCallback(ActionMode.Callback actionModeCallback) {
10173        mCustomSelectionActionModeCallback = actionModeCallback;
10174    }
10175
10176    /**
10177     * Retrieves the value set in {@link #setCustomSelectionActionModeCallback}. Default is null.
10178     *
10179     * @return The current custom selection callback.
10180     */
10181    public ActionMode.Callback getCustomSelectionActionModeCallback() {
10182        return mCustomSelectionActionModeCallback;
10183    }
10184
10185    /**
10186     *
10187     * @return true if the selection mode was actually started.
10188     */
10189    private boolean startSelectionActionMode() {
10190        if (mSelectionActionMode != null) {
10191            // Selection action mode is already started
10192            return false;
10193        }
10194
10195        if (!canSelectText() || !requestFocus()) {
10196            Log.w(LOG_TAG, "TextView does not support text selection. Action mode cancelled.");
10197            return false;
10198        }
10199
10200        if (!hasSelection()) {
10201            // There may already be a selection on device rotation
10202            if (!selectCurrentWord()) {
10203                // No word found under cursor or text selection not permitted.
10204                return false;
10205            }
10206        }
10207
10208        final InputMethodManager imm = InputMethodManager.peekInstance();
10209        boolean extractedTextModeWillBeStartedFullScreen = !(this instanceof ExtractEditText) &&
10210                imm != null && imm.isFullscreenMode();
10211
10212        // Do not start the action mode when extracted text will show up full screen, thus
10213        // immediately hiding the newly created action bar, which would be visually distracting.
10214        if (!extractedTextModeWillBeStartedFullScreen) {
10215            ActionMode.Callback actionModeCallback = new SelectionActionModeCallback();
10216            mSelectionActionMode = startActionMode(actionModeCallback);
10217        }
10218        final boolean selectionStarted = mSelectionActionMode != null ||
10219                extractedTextModeWillBeStartedFullScreen;
10220
10221        if (selectionStarted && !mTextIsSelectable && imm != null && mSoftInputShownOnFocus) {
10222            // Show the IME to be able to replace text, except when selecting non editable text.
10223            imm.showSoftInput(this, 0, null);
10224        }
10225
10226        return selectionStarted;
10227    }
10228
10229    private void stopSelectionActionMode() {
10230        if (mSelectionActionMode != null) {
10231            // This will hide the mSelectionModifierCursorController
10232            mSelectionActionMode.finish();
10233        }
10234    }
10235
10236    /**
10237     * Paste clipboard content between min and max positions.
10238     */
10239    private void paste(int min, int max) {
10240        ClipboardManager clipboard =
10241            (ClipboardManager) getContext().getSystemService(Context.CLIPBOARD_SERVICE);
10242        ClipData clip = clipboard.getPrimaryClip();
10243        if (clip != null) {
10244            boolean didFirst = false;
10245            for (int i=0; i<clip.getItemCount(); i++) {
10246                CharSequence paste = clip.getItemAt(i).coerceToText(getContext());
10247                if (paste != null) {
10248                    if (!didFirst) {
10249                        long minMax = prepareSpacesAroundPaste(min, max, paste);
10250                        min = extractRangeStartFromLong(minMax);
10251                        max = extractRangeEndFromLong(minMax);
10252                        Selection.setSelection((Spannable) mText, max);
10253                        ((Editable) mText).replace(min, max, paste);
10254                        didFirst = true;
10255                    } else {
10256                        ((Editable) mText).insert(getSelectionEnd(), "\n");
10257                        ((Editable) mText).insert(getSelectionEnd(), paste);
10258                    }
10259                }
10260            }
10261            stopSelectionActionMode();
10262            sLastCutOrCopyTime = 0;
10263        }
10264    }
10265
10266    private void setPrimaryClip(ClipData clip) {
10267        ClipboardManager clipboard = (ClipboardManager) getContext().
10268                getSystemService(Context.CLIPBOARD_SERVICE);
10269        clipboard.setPrimaryClip(clip);
10270        sLastCutOrCopyTime = SystemClock.uptimeMillis();
10271    }
10272
10273    /**
10274     * An ActionMode Callback class that is used to provide actions while in text selection mode.
10275     *
10276     * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending
10277     * on which of these this TextView supports.
10278     */
10279    private class SelectionActionModeCallback implements ActionMode.Callback {
10280
10281        @Override
10282        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
10283            TypedArray styledAttributes = mContext.obtainStyledAttributes(
10284                    com.android.internal.R.styleable.SelectionModeDrawables);
10285
10286            boolean allowText = getContext().getResources().getBoolean(
10287                    com.android.internal.R.bool.config_allowActionMenuItemTextWithIcon);
10288
10289            mode.setTitle(allowText ?
10290                    mContext.getString(com.android.internal.R.string.textSelectionCABTitle) : null);
10291            mode.setSubtitle(null);
10292
10293            int selectAllIconId = 0; // No icon by default
10294            if (!allowText) {
10295                // Provide an icon, text will not be displayed on smaller screens.
10296                selectAllIconId = styledAttributes.getResourceId(
10297                        R.styleable.SelectionModeDrawables_actionModeSelectAllDrawable, 0);
10298            }
10299
10300            menu.add(0, ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll).
10301                    setIcon(selectAllIconId).
10302                    setAlphabeticShortcut('a').
10303                    setShowAsAction(
10304                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10305
10306            if (canCut()) {
10307                menu.add(0, ID_CUT, 0, com.android.internal.R.string.cut).
10308                    setIcon(styledAttributes.getResourceId(
10309                            R.styleable.SelectionModeDrawables_actionModeCutDrawable, 0)).
10310                    setAlphabeticShortcut('x').
10311                    setShowAsAction(
10312                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10313            }
10314
10315            if (canCopy()) {
10316                menu.add(0, ID_COPY, 0, com.android.internal.R.string.copy).
10317                    setIcon(styledAttributes.getResourceId(
10318                            R.styleable.SelectionModeDrawables_actionModeCopyDrawable, 0)).
10319                    setAlphabeticShortcut('c').
10320                    setShowAsAction(
10321                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10322            }
10323
10324            if (canPaste()) {
10325                menu.add(0, ID_PASTE, 0, com.android.internal.R.string.paste).
10326                        setIcon(styledAttributes.getResourceId(
10327                                R.styleable.SelectionModeDrawables_actionModePasteDrawable, 0)).
10328                        setAlphabeticShortcut('v').
10329                        setShowAsAction(
10330                                MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10331            }
10332
10333            styledAttributes.recycle();
10334
10335            if (mCustomSelectionActionModeCallback != null) {
10336                if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) {
10337                    // The custom mode can choose to cancel the action mode
10338                    return false;
10339                }
10340            }
10341
10342            if (menu.hasVisibleItems() || mode.getCustomView() != null) {
10343                getSelectionController().show();
10344                return true;
10345            } else {
10346                return false;
10347            }
10348        }
10349
10350        @Override
10351        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
10352            if (mCustomSelectionActionModeCallback != null) {
10353                return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu);
10354            }
10355            return true;
10356        }
10357
10358        @Override
10359        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
10360            if (mCustomSelectionActionModeCallback != null &&
10361                 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) {
10362                return true;
10363            }
10364            return onTextContextMenuItem(item.getItemId());
10365        }
10366
10367        @Override
10368        public void onDestroyActionMode(ActionMode mode) {
10369            if (mCustomSelectionActionModeCallback != null) {
10370                mCustomSelectionActionModeCallback.onDestroyActionMode(mode);
10371            }
10372            Selection.setSelection((Spannable) mText, getSelectionEnd());
10373
10374            if (mSelectionModifierCursorController != null) {
10375                mSelectionModifierCursorController.hide();
10376            }
10377
10378            mSelectionActionMode = null;
10379        }
10380    }
10381
10382    private class ActionPopupWindow extends PinnedPopupWindow implements OnClickListener {
10383        private static final int POPUP_TEXT_LAYOUT =
10384                com.android.internal.R.layout.text_edit_action_popup_text;
10385        private TextView mPasteTextView;
10386        private TextView mReplaceTextView;
10387
10388        @Override
10389        protected void createPopupWindow() {
10390            mPopupWindow = new PopupWindow(TextView.this.mContext, null,
10391                    com.android.internal.R.attr.textSelectHandleWindowStyle);
10392            mPopupWindow.setClippingEnabled(true);
10393        }
10394
10395        @Override
10396        protected void initContentView() {
10397            LinearLayout linearLayout = new LinearLayout(TextView.this.getContext());
10398            linearLayout.setOrientation(LinearLayout.HORIZONTAL);
10399            mContentView = linearLayout;
10400            mContentView.setBackgroundResource(
10401                    com.android.internal.R.drawable.text_edit_paste_window);
10402
10403            LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
10404                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
10405
10406            LayoutParams wrapContent = new LayoutParams(
10407                    ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
10408
10409            mPasteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
10410            mPasteTextView.setLayoutParams(wrapContent);
10411            mContentView.addView(mPasteTextView);
10412            mPasteTextView.setText(com.android.internal.R.string.paste);
10413            mPasteTextView.setOnClickListener(this);
10414
10415            mReplaceTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
10416            mReplaceTextView.setLayoutParams(wrapContent);
10417            mContentView.addView(mReplaceTextView);
10418            mReplaceTextView.setText(com.android.internal.R.string.replace);
10419            mReplaceTextView.setOnClickListener(this);
10420        }
10421
10422        @Override
10423        public void show() {
10424            boolean canPaste = canPaste();
10425            boolean canSuggest = isSuggestionsEnabled() && isCursorInsideSuggestionSpan();
10426            mPasteTextView.setVisibility(canPaste ? View.VISIBLE : View.GONE);
10427            mReplaceTextView.setVisibility(canSuggest ? View.VISIBLE : View.GONE);
10428
10429            if (!canPaste && !canSuggest) return;
10430
10431            super.show();
10432        }
10433
10434        @Override
10435        public void onClick(View view) {
10436            if (view == mPasteTextView && canPaste()) {
10437                onTextContextMenuItem(ID_PASTE);
10438                hide();
10439            } else if (view == mReplaceTextView) {
10440                final int middle = (getSelectionStart() + getSelectionEnd()) / 2;
10441                stopSelectionActionMode();
10442                Selection.setSelection((Spannable) mText, middle);
10443                showSuggestions();
10444            }
10445        }
10446
10447        @Override
10448        protected int getTextOffset() {
10449            return (getSelectionStart() + getSelectionEnd()) / 2;
10450        }
10451
10452        @Override
10453        protected int getVerticalLocalPosition(int line) {
10454            return mLayout.getLineTop(line) - mContentView.getMeasuredHeight();
10455        }
10456
10457        @Override
10458        protected int clipVertically(int positionY) {
10459            if (positionY < 0) {
10460                final int offset = getTextOffset();
10461                final int line = mLayout.getLineForOffset(offset);
10462                positionY += mLayout.getLineBottom(line) - mLayout.getLineTop(line);
10463                positionY += mContentView.getMeasuredHeight();
10464
10465                // Assumes insertion and selection handles share the same height
10466                final Drawable handle = mContext.getResources().getDrawable(mTextSelectHandleRes);
10467                positionY += handle.getIntrinsicHeight();
10468            }
10469
10470            return positionY;
10471        }
10472    }
10473
10474    private abstract class HandleView extends View implements TextViewPositionListener {
10475        protected Drawable mDrawable;
10476        protected Drawable mDrawableLtr;
10477        protected Drawable mDrawableRtl;
10478        private final PopupWindow mContainer;
10479        // Position with respect to the parent TextView
10480        private int mPositionX, mPositionY;
10481        private boolean mIsDragging;
10482        // Offset from touch position to mPosition
10483        private float mTouchToWindowOffsetX, mTouchToWindowOffsetY;
10484        protected int mHotspotX;
10485        // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up
10486        private float mTouchOffsetY;
10487        // Where the touch position should be on the handle to ensure a maximum cursor visibility
10488        private float mIdealVerticalOffset;
10489        // Parent's (TextView) previous position in window
10490        private int mLastParentX, mLastParentY;
10491        // Transient action popup window for Paste and Replace actions
10492        protected ActionPopupWindow mActionPopupWindow;
10493        // Previous text character offset
10494        private int mPreviousOffset = -1;
10495        // Previous text character offset
10496        private boolean mPositionHasChanged = true;
10497        // Used to delay the appearance of the action popup window
10498        private Runnable mActionPopupShower;
10499
10500        public HandleView(Drawable drawableLtr, Drawable drawableRtl) {
10501            super(TextView.this.mContext);
10502            mContainer = new PopupWindow(TextView.this.mContext, null,
10503                    com.android.internal.R.attr.textSelectHandleWindowStyle);
10504            mContainer.setSplitTouchEnabled(true);
10505            mContainer.setClippingEnabled(false);
10506            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
10507            mContainer.setContentView(this);
10508
10509            mDrawableLtr = drawableLtr;
10510            mDrawableRtl = drawableRtl;
10511
10512            updateDrawable();
10513
10514            final int handleHeight = mDrawable.getIntrinsicHeight();
10515            mTouchOffsetY = -0.3f * handleHeight;
10516            mIdealVerticalOffset = 0.7f * handleHeight;
10517        }
10518
10519        protected void updateDrawable() {
10520            final int offset = getCurrentCursorOffset();
10521            final boolean isRtlCharAtOffset = mLayout.isRtlCharAt(offset);
10522            mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr;
10523            mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset);
10524        }
10525
10526        protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun);
10527
10528        // Touch-up filter: number of previous positions remembered
10529        private static final int HISTORY_SIZE = 5;
10530        private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150;
10531        private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350;
10532        private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE];
10533        private final int[] mPreviousOffsets = new int[HISTORY_SIZE];
10534        private int mPreviousOffsetIndex = 0;
10535        private int mNumberPreviousOffsets = 0;
10536
10537        private void startTouchUpFilter(int offset) {
10538            mNumberPreviousOffsets = 0;
10539            addPositionToTouchUpFilter(offset);
10540        }
10541
10542        private void addPositionToTouchUpFilter(int offset) {
10543            mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE;
10544            mPreviousOffsets[mPreviousOffsetIndex] = offset;
10545            mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis();
10546            mNumberPreviousOffsets++;
10547        }
10548
10549        private void filterOnTouchUp() {
10550            final long now = SystemClock.uptimeMillis();
10551            int i = 0;
10552            int index = mPreviousOffsetIndex;
10553            final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE);
10554            while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) {
10555                i++;
10556                index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE;
10557            }
10558
10559            if (i > 0 && i < iMax &&
10560                    (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) {
10561                positionAtCursorOffset(mPreviousOffsets[index], false);
10562            }
10563        }
10564
10565        public boolean offsetHasBeenChanged() {
10566            return mNumberPreviousOffsets > 1;
10567        }
10568
10569        @Override
10570        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
10571            setMeasuredDimension(mDrawable.getIntrinsicWidth(), mDrawable.getIntrinsicHeight());
10572        }
10573
10574        public void show() {
10575            if (isShowing()) return;
10576
10577            getPositionListener().addSubscriber(this, true /* local position may change */);
10578
10579            // Make sure the offset is always considered new, even when focusing at same position
10580            mPreviousOffset = -1;
10581            positionAtCursorOffset(getCurrentCursorOffset(), false);
10582
10583            hideActionPopupWindow();
10584        }
10585
10586        protected void dismiss() {
10587            mIsDragging = false;
10588            mContainer.dismiss();
10589            onDetached();
10590        }
10591
10592        public void hide() {
10593            dismiss();
10594
10595            TextView.this.getPositionListener().removeSubscriber(this);
10596        }
10597
10598        void showActionPopupWindow(int delay) {
10599            if (mActionPopupWindow == null) {
10600                mActionPopupWindow = new ActionPopupWindow();
10601            }
10602            if (mActionPopupShower == null) {
10603                mActionPopupShower = new Runnable() {
10604                    public void run() {
10605                        mActionPopupWindow.show();
10606                    }
10607                };
10608            } else {
10609                TextView.this.removeCallbacks(mActionPopupShower);
10610            }
10611            TextView.this.postDelayed(mActionPopupShower, delay);
10612        }
10613
10614        protected void hideActionPopupWindow() {
10615            if (mActionPopupShower != null) {
10616                TextView.this.removeCallbacks(mActionPopupShower);
10617            }
10618            if (mActionPopupWindow != null) {
10619                mActionPopupWindow.hide();
10620            }
10621        }
10622
10623        public boolean isShowing() {
10624            return mContainer.isShowing();
10625        }
10626
10627        private boolean isVisible() {
10628            // Always show a dragging handle.
10629            if (mIsDragging) {
10630                return true;
10631            }
10632
10633            if (isInBatchEditMode()) {
10634                return false;
10635            }
10636
10637            return getPositionListener().isVisible(mPositionX + mHotspotX, mPositionY);
10638        }
10639
10640        public abstract int getCurrentCursorOffset();
10641
10642        protected abstract void updateSelection(int offset);
10643
10644        public abstract void updatePosition(float x, float y);
10645
10646        protected void positionAtCursorOffset(int offset, boolean parentScrolled) {
10647            // A HandleView relies on the layout, which may be nulled by external methods
10648            if (mLayout == null) {
10649                // Will update controllers' state, hiding them and stopping selection mode if needed
10650                prepareCursorControllers();
10651                return;
10652            }
10653
10654            if (offset != mPreviousOffset || parentScrolled) {
10655                updateSelection(offset);
10656                addPositionToTouchUpFilter(offset);
10657                final int line = mLayout.getLineForOffset(offset);
10658
10659                mPositionX = (int) (mLayout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX);
10660                mPositionY = mLayout.getLineBottom(line);
10661
10662                // Take TextView's padding and scroll into account.
10663                mPositionX += viewportToContentHorizontalOffset();
10664                mPositionY += viewportToContentVerticalOffset();
10665
10666                mPreviousOffset = offset;
10667                mPositionHasChanged = true;
10668            }
10669        }
10670
10671        public void updatePosition(int parentPositionX, int parentPositionY,
10672                boolean parentPositionChanged, boolean parentScrolled) {
10673            positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled);
10674            if (parentPositionChanged || mPositionHasChanged) {
10675                if (mIsDragging) {
10676                    // Update touchToWindow offset in case of parent scrolling while dragging
10677                    if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) {
10678                        mTouchToWindowOffsetX += parentPositionX - mLastParentX;
10679                        mTouchToWindowOffsetY += parentPositionY - mLastParentY;
10680                        mLastParentX = parentPositionX;
10681                        mLastParentY = parentPositionY;
10682                    }
10683
10684                    onHandleMoved();
10685                }
10686
10687                if (isVisible()) {
10688                    final int positionX = parentPositionX + mPositionX;
10689                    final int positionY = parentPositionY + mPositionY;
10690                    if (isShowing()) {
10691                        mContainer.update(positionX, positionY, -1, -1);
10692                    } else {
10693                        mContainer.showAtLocation(TextView.this, Gravity.NO_GRAVITY,
10694                                positionX, positionY);
10695                    }
10696                } else {
10697                    if (isShowing()) {
10698                        dismiss();
10699                    }
10700                }
10701
10702                mPositionHasChanged = false;
10703            }
10704        }
10705
10706        @Override
10707        protected void onDraw(Canvas c) {
10708            mDrawable.setBounds(0, 0, mRight - mLeft, mBottom - mTop);
10709            mDrawable.draw(c);
10710        }
10711
10712        @Override
10713        public boolean onTouchEvent(MotionEvent ev) {
10714            switch (ev.getActionMasked()) {
10715                case MotionEvent.ACTION_DOWN: {
10716                    startTouchUpFilter(getCurrentCursorOffset());
10717                    mTouchToWindowOffsetX = ev.getRawX() - mPositionX;
10718                    mTouchToWindowOffsetY = ev.getRawY() - mPositionY;
10719
10720                    final PositionListener positionListener = getPositionListener();
10721                    mLastParentX = positionListener.getPositionX();
10722                    mLastParentY = positionListener.getPositionY();
10723                    mIsDragging = true;
10724                    break;
10725                }
10726
10727                case MotionEvent.ACTION_MOVE: {
10728                    final float rawX = ev.getRawX();
10729                    final float rawY = ev.getRawY();
10730
10731                    // Vertical hysteresis: vertical down movement tends to snap to ideal offset
10732                    final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY;
10733                    final float currentVerticalOffset = rawY - mPositionY - mLastParentY;
10734                    float newVerticalOffset;
10735                    if (previousVerticalOffset < mIdealVerticalOffset) {
10736                        newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset);
10737                        newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset);
10738                    } else {
10739                        newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset);
10740                        newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset);
10741                    }
10742                    mTouchToWindowOffsetY = newVerticalOffset + mLastParentY;
10743
10744                    final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX;
10745                    final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY;
10746
10747                    updatePosition(newPosX, newPosY);
10748                    break;
10749                }
10750
10751                case MotionEvent.ACTION_UP:
10752                    filterOnTouchUp();
10753                    mIsDragging = false;
10754                    break;
10755
10756                case MotionEvent.ACTION_CANCEL:
10757                    mIsDragging = false;
10758                    break;
10759            }
10760            return true;
10761        }
10762
10763        public boolean isDragging() {
10764            return mIsDragging;
10765        }
10766
10767        void onHandleMoved() {
10768            hideActionPopupWindow();
10769        }
10770
10771        public void onDetached() {
10772            hideActionPopupWindow();
10773        }
10774    }
10775
10776    private class InsertionHandleView extends HandleView {
10777        private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000;
10778        private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds
10779
10780        // Used to detect taps on the insertion handle, which will affect the ActionPopupWindow
10781        private float mDownPositionX, mDownPositionY;
10782        private Runnable mHider;
10783
10784        public InsertionHandleView(Drawable drawable) {
10785            super(drawable, drawable);
10786        }
10787
10788        @Override
10789        public void show() {
10790            super.show();
10791
10792            final long durationSinceCutOrCopy = SystemClock.uptimeMillis() - sLastCutOrCopyTime;
10793            if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) {
10794                showActionPopupWindow(0);
10795            }
10796
10797            hideAfterDelay();
10798        }
10799
10800        public void showWithActionPopup() {
10801            show();
10802            showActionPopupWindow(0);
10803        }
10804
10805        private void hideAfterDelay() {
10806            removeHiderCallback();
10807            if (mHider == null) {
10808                mHider = new Runnable() {
10809                    public void run() {
10810                        hide();
10811                    }
10812                };
10813            }
10814            TextView.this.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT);
10815        }
10816
10817        private void removeHiderCallback() {
10818            if (mHider != null) {
10819                TextView.this.removeCallbacks(mHider);
10820            }
10821        }
10822
10823        @Override
10824        protected int getHotspotX(Drawable drawable, boolean isRtlRun) {
10825            return drawable.getIntrinsicWidth() / 2;
10826        }
10827
10828        @Override
10829        public boolean onTouchEvent(MotionEvent ev) {
10830            final boolean result = super.onTouchEvent(ev);
10831
10832            switch (ev.getActionMasked()) {
10833                case MotionEvent.ACTION_DOWN:
10834                    mDownPositionX = ev.getRawX();
10835                    mDownPositionY = ev.getRawY();
10836                    break;
10837
10838                case MotionEvent.ACTION_UP:
10839                    if (!offsetHasBeenChanged()) {
10840                        final float deltaX = mDownPositionX - ev.getRawX();
10841                        final float deltaY = mDownPositionY - ev.getRawY();
10842                        final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
10843                        if (distanceSquared < mSquaredTouchSlopDistance) {
10844                            if (mActionPopupWindow != null && mActionPopupWindow.isShowing()) {
10845                                // Tapping on the handle dismisses the displayed action popup
10846                                mActionPopupWindow.hide();
10847                            } else {
10848                                showWithActionPopup();
10849                            }
10850                        }
10851                    }
10852                    hideAfterDelay();
10853                    break;
10854
10855                case MotionEvent.ACTION_CANCEL:
10856                    hideAfterDelay();
10857                    break;
10858
10859                default:
10860                    break;
10861            }
10862
10863            return result;
10864        }
10865
10866        @Override
10867        public int getCurrentCursorOffset() {
10868            return TextView.this.getSelectionStart();
10869        }
10870
10871        @Override
10872        public void updateSelection(int offset) {
10873            Selection.setSelection((Spannable) mText, offset);
10874        }
10875
10876        @Override
10877        public void updatePosition(float x, float y) {
10878            positionAtCursorOffset(getOffsetForPosition(x, y), false);
10879        }
10880
10881        @Override
10882        void onHandleMoved() {
10883            super.onHandleMoved();
10884            removeHiderCallback();
10885        }
10886
10887        @Override
10888        public void onDetached() {
10889            super.onDetached();
10890            removeHiderCallback();
10891        }
10892    }
10893
10894    private class SelectionStartHandleView extends HandleView {
10895
10896        public SelectionStartHandleView(Drawable drawableLtr, Drawable drawableRtl) {
10897            super(drawableLtr, drawableRtl);
10898        }
10899
10900        @Override
10901        protected int getHotspotX(Drawable drawable, boolean isRtlRun) {
10902            if (isRtlRun) {
10903                return drawable.getIntrinsicWidth() / 4;
10904            } else {
10905                return (drawable.getIntrinsicWidth() * 3) / 4;
10906            }
10907        }
10908
10909        @Override
10910        public int getCurrentCursorOffset() {
10911            return TextView.this.getSelectionStart();
10912        }
10913
10914        @Override
10915        public void updateSelection(int offset) {
10916            Selection.setSelection((Spannable) mText, offset, getSelectionEnd());
10917            updateDrawable();
10918        }
10919
10920        @Override
10921        public void updatePosition(float x, float y) {
10922            int offset = getOffsetForPosition(x, y);
10923
10924            // Handles can not cross and selection is at least one character
10925            final int selectionEnd = getSelectionEnd();
10926            if (offset >= selectionEnd) offset = selectionEnd - 1;
10927
10928            positionAtCursorOffset(offset, false);
10929        }
10930
10931        public ActionPopupWindow getActionPopupWindow() {
10932            return mActionPopupWindow;
10933        }
10934    }
10935
10936    private class SelectionEndHandleView extends HandleView {
10937
10938        public SelectionEndHandleView(Drawable drawableLtr, Drawable drawableRtl) {
10939            super(drawableLtr, drawableRtl);
10940        }
10941
10942        @Override
10943        protected int getHotspotX(Drawable drawable, boolean isRtlRun) {
10944            if (isRtlRun) {
10945                return (drawable.getIntrinsicWidth() * 3) / 4;
10946            } else {
10947                return drawable.getIntrinsicWidth() / 4;
10948            }
10949        }
10950
10951        @Override
10952        public int getCurrentCursorOffset() {
10953            return TextView.this.getSelectionEnd();
10954        }
10955
10956        @Override
10957        public void updateSelection(int offset) {
10958            Selection.setSelection((Spannable) mText, getSelectionStart(), offset);
10959            updateDrawable();
10960        }
10961
10962        @Override
10963        public void updatePosition(float x, float y) {
10964            int offset = getOffsetForPosition(x, y);
10965
10966            // Handles can not cross and selection is at least one character
10967            final int selectionStart = getSelectionStart();
10968            if (offset <= selectionStart) offset = selectionStart + 1;
10969
10970            positionAtCursorOffset(offset, false);
10971        }
10972
10973        public void setActionPopupWindow(ActionPopupWindow actionPopupWindow) {
10974            mActionPopupWindow = actionPopupWindow;
10975        }
10976    }
10977
10978    /**
10979     * A CursorController instance can be used to control a cursor in the text.
10980     * It is not used outside of {@link TextView}.
10981     * @hide
10982     */
10983    private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener {
10984        /**
10985         * Makes the cursor controller visible on screen. Will be drawn by {@link #draw(Canvas)}.
10986         * See also {@link #hide()}.
10987         */
10988        public void show();
10989
10990        /**
10991         * Hide the cursor controller from screen.
10992         * See also {@link #show()}.
10993         */
10994        public void hide();
10995
10996        /**
10997         * Called when the view is detached from window. Perform house keeping task, such as
10998         * stopping Runnable thread that would otherwise keep a reference on the context, thus
10999         * preventing the activity from being recycled.
11000         */
11001        public void onDetached();
11002    }
11003
11004    private class InsertionPointCursorController implements CursorController {
11005        private InsertionHandleView mHandle;
11006
11007        public void show() {
11008            getHandle().show();
11009        }
11010
11011        public void showWithActionPopup() {
11012            getHandle().showWithActionPopup();
11013        }
11014
11015        public void hide() {
11016            if (mHandle != null) {
11017                mHandle.hide();
11018            }
11019        }
11020
11021        public void onTouchModeChanged(boolean isInTouchMode) {
11022            if (!isInTouchMode) {
11023                hide();
11024            }
11025        }
11026
11027        private InsertionHandleView getHandle() {
11028            if (mSelectHandleCenter == null) {
11029                mSelectHandleCenter = mContext.getResources().getDrawable(
11030                        mTextSelectHandleRes);
11031            }
11032            if (mHandle == null) {
11033                mHandle = new InsertionHandleView(mSelectHandleCenter);
11034            }
11035            return mHandle;
11036        }
11037
11038        @Override
11039        public void onDetached() {
11040            final ViewTreeObserver observer = getViewTreeObserver();
11041            observer.removeOnTouchModeChangeListener(this);
11042
11043            if (mHandle != null) mHandle.onDetached();
11044        }
11045    }
11046
11047    private class SelectionModifierCursorController implements CursorController {
11048        private static final int DELAY_BEFORE_REPLACE_ACTION = 200; // milliseconds
11049        // The cursor controller handles, lazily created when shown.
11050        private SelectionStartHandleView mStartHandle;
11051        private SelectionEndHandleView mEndHandle;
11052        // The offsets of that last touch down event. Remembered to start selection there.
11053        private int mMinTouchOffset, mMaxTouchOffset;
11054
11055        // Double tap detection
11056        private long mPreviousTapUpTime = 0;
11057        private float mPreviousTapPositionX, mPreviousTapPositionY;
11058
11059        SelectionModifierCursorController() {
11060            resetTouchOffsets();
11061        }
11062
11063        public void show() {
11064            if (isInBatchEditMode()) {
11065                return;
11066            }
11067            initDrawables();
11068            initHandles();
11069            hideInsertionPointCursorController();
11070        }
11071
11072        private void initDrawables() {
11073            if (mSelectHandleLeft == null) {
11074                mSelectHandleLeft = mContext.getResources().getDrawable(
11075                        mTextSelectHandleLeftRes);
11076            }
11077            if (mSelectHandleRight == null) {
11078                mSelectHandleRight = mContext.getResources().getDrawable(
11079                        mTextSelectHandleRightRes);
11080            }
11081        }
11082
11083        private void initHandles() {
11084            // Lazy object creation has to be done before updatePosition() is called.
11085            if (mStartHandle == null) {
11086                mStartHandle = new SelectionStartHandleView(mSelectHandleLeft, mSelectHandleRight);
11087            }
11088            if (mEndHandle == null) {
11089                mEndHandle = new SelectionEndHandleView(mSelectHandleRight, mSelectHandleLeft);
11090            }
11091
11092            mStartHandle.show();
11093            mEndHandle.show();
11094
11095            // Make sure both left and right handles share the same ActionPopupWindow (so that
11096            // moving any of the handles hides the action popup).
11097            mStartHandle.showActionPopupWindow(DELAY_BEFORE_REPLACE_ACTION);
11098            mEndHandle.setActionPopupWindow(mStartHandle.getActionPopupWindow());
11099
11100            hideInsertionPointCursorController();
11101        }
11102
11103        public void hide() {
11104            if (mStartHandle != null) mStartHandle.hide();
11105            if (mEndHandle != null) mEndHandle.hide();
11106        }
11107
11108        public void onTouchEvent(MotionEvent event) {
11109            // This is done even when the View does not have focus, so that long presses can start
11110            // selection and tap can move cursor from this tap position.
11111            switch (event.getActionMasked()) {
11112                case MotionEvent.ACTION_DOWN:
11113                    final float x = event.getX();
11114                    final float y = event.getY();
11115
11116                    // Remember finger down position, to be able to start selection from there
11117                    mMinTouchOffset = mMaxTouchOffset = getOffsetForPosition(x, y);
11118
11119                    // Double tap detection
11120                    long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime;
11121                    if (duration <= ViewConfiguration.getDoubleTapTimeout() &&
11122                            isPositionOnText(x, y)) {
11123                        final float deltaX = x - mPreviousTapPositionX;
11124                        final float deltaY = y - mPreviousTapPositionY;
11125                        final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
11126                        if (distanceSquared < mSquaredTouchSlopDistance) {
11127                            startSelectionActionMode();
11128                            mDiscardNextActionUp = true;
11129                        }
11130                    }
11131
11132                    mPreviousTapPositionX = x;
11133                    mPreviousTapPositionY = y;
11134                    break;
11135
11136                case MotionEvent.ACTION_POINTER_DOWN:
11137                case MotionEvent.ACTION_POINTER_UP:
11138                    // Handle multi-point gestures. Keep min and max offset positions.
11139                    // Only activated for devices that correctly handle multi-touch.
11140                    if (mContext.getPackageManager().hasSystemFeature(
11141                            PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) {
11142                        updateMinAndMaxOffsets(event);
11143                    }
11144                    break;
11145
11146                case MotionEvent.ACTION_UP:
11147                    mPreviousTapUpTime = SystemClock.uptimeMillis();
11148                    break;
11149            }
11150        }
11151
11152        /**
11153         * @param event
11154         */
11155        private void updateMinAndMaxOffsets(MotionEvent event) {
11156            int pointerCount = event.getPointerCount();
11157            for (int index = 0; index < pointerCount; index++) {
11158                int offset = getOffsetForPosition(event.getX(index), event.getY(index));
11159                if (offset < mMinTouchOffset) mMinTouchOffset = offset;
11160                if (offset > mMaxTouchOffset) mMaxTouchOffset = offset;
11161            }
11162        }
11163
11164        public int getMinTouchOffset() {
11165            return mMinTouchOffset;
11166        }
11167
11168        public int getMaxTouchOffset() {
11169            return mMaxTouchOffset;
11170        }
11171
11172        public void resetTouchOffsets() {
11173            mMinTouchOffset = mMaxTouchOffset = -1;
11174        }
11175
11176        /**
11177         * @return true iff this controller is currently used to move the selection start.
11178         */
11179        public boolean isSelectionStartDragged() {
11180            return mStartHandle != null && mStartHandle.isDragging();
11181        }
11182
11183        public void onTouchModeChanged(boolean isInTouchMode) {
11184            if (!isInTouchMode) {
11185                hide();
11186            }
11187        }
11188
11189        @Override
11190        public void onDetached() {
11191            final ViewTreeObserver observer = getViewTreeObserver();
11192            observer.removeOnTouchModeChangeListener(this);
11193
11194            if (mStartHandle != null) mStartHandle.onDetached();
11195            if (mEndHandle != null) mEndHandle.onDetached();
11196        }
11197    }
11198
11199    private void hideInsertionPointCursorController() {
11200        // No need to create the controller to hide it.
11201        if (mInsertionPointCursorController != null) {
11202            mInsertionPointCursorController.hide();
11203        }
11204    }
11205
11206    /**
11207     * Hides the insertion controller and stops text selection mode, hiding the selection controller
11208     */
11209    private void hideControllers() {
11210        hideCursorControllers();
11211        hideSpanControllers();
11212    }
11213
11214    private void hideSpanControllers() {
11215        if (mChangeWatcher != null) {
11216            mChangeWatcher.hideControllers();
11217        }
11218    }
11219
11220    private void hideCursorControllers() {
11221        if (mSuggestionsPopupWindow != null && !mSuggestionsPopupWindow.isShowingUp()) {
11222            // Should be done before hide insertion point controller since it triggers a show of it
11223            mSuggestionsPopupWindow.hide();
11224        }
11225        hideInsertionPointCursorController();
11226        stopSelectionActionMode();
11227    }
11228
11229    /**
11230     * Get the character offset closest to the specified absolute position. A typical use case is to
11231     * pass the result of {@link MotionEvent#getX()} and {@link MotionEvent#getY()} to this method.
11232     *
11233     * @param x The horizontal absolute position of a point on screen
11234     * @param y The vertical absolute position of a point on screen
11235     * @return the character offset for the character whose position is closest to the specified
11236     *  position. Returns -1 if there is no layout.
11237     */
11238    public int getOffsetForPosition(float x, float y) {
11239        if (getLayout() == null) return -1;
11240        final int line = getLineAtCoordinate(y);
11241        final int offset = getOffsetAtCoordinate(line, x);
11242        return offset;
11243    }
11244
11245    private float convertToLocalHorizontalCoordinate(float x) {
11246        x -= getTotalPaddingLeft();
11247        // Clamp the position to inside of the view.
11248        x = Math.max(0.0f, x);
11249        x = Math.min(getWidth() - getTotalPaddingRight() - 1, x);
11250        x += getScrollX();
11251        return x;
11252    }
11253
11254    private int getLineAtCoordinate(float y) {
11255        y -= getTotalPaddingTop();
11256        // Clamp the position to inside of the view.
11257        y = Math.max(0.0f, y);
11258        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
11259        y += getScrollY();
11260        return getLayout().getLineForVertical((int) y);
11261    }
11262
11263    private int getOffsetAtCoordinate(int line, float x) {
11264        x = convertToLocalHorizontalCoordinate(x);
11265        return getLayout().getOffsetForHorizontal(line, x);
11266    }
11267
11268    /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed
11269     * in the view. Returns false when the position is in the empty space of left/right of text.
11270     */
11271    private boolean isPositionOnText(float x, float y) {
11272        if (getLayout() == null) return false;
11273
11274        final int line = getLineAtCoordinate(y);
11275        x = convertToLocalHorizontalCoordinate(x);
11276
11277        if (x < getLayout().getLineLeft(line)) return false;
11278        if (x > getLayout().getLineRight(line)) return false;
11279        return true;
11280    }
11281
11282    @Override
11283    public boolean onDragEvent(DragEvent event) {
11284        switch (event.getAction()) {
11285            case DragEvent.ACTION_DRAG_STARTED:
11286                return hasInsertionController();
11287
11288            case DragEvent.ACTION_DRAG_ENTERED:
11289                TextView.this.requestFocus();
11290                return true;
11291
11292            case DragEvent.ACTION_DRAG_LOCATION:
11293                final int offset = getOffsetForPosition(event.getX(), event.getY());
11294                Selection.setSelection((Spannable)mText, offset);
11295                return true;
11296
11297            case DragEvent.ACTION_DROP:
11298                onDrop(event);
11299                return true;
11300
11301            case DragEvent.ACTION_DRAG_ENDED:
11302            case DragEvent.ACTION_DRAG_EXITED:
11303            default:
11304                return true;
11305        }
11306    }
11307
11308    private void onDrop(DragEvent event) {
11309        StringBuilder content = new StringBuilder("");
11310        ClipData clipData = event.getClipData();
11311        final int itemCount = clipData.getItemCount();
11312        for (int i=0; i < itemCount; i++) {
11313            Item item = clipData.getItemAt(i);
11314            content.append(item.coerceToText(TextView.this.mContext));
11315        }
11316
11317        final int offset = getOffsetForPosition(event.getX(), event.getY());
11318
11319        Object localState = event.getLocalState();
11320        DragLocalState dragLocalState = null;
11321        if (localState instanceof DragLocalState) {
11322            dragLocalState = (DragLocalState) localState;
11323        }
11324        boolean dragDropIntoItself = dragLocalState != null &&
11325                dragLocalState.sourceTextView == this;
11326
11327        if (dragDropIntoItself) {
11328            if (offset >= dragLocalState.start && offset < dragLocalState.end) {
11329                // A drop inside the original selection discards the drop.
11330                return;
11331            }
11332        }
11333
11334        final int originalLength = mText.length();
11335        long minMax = prepareSpacesAroundPaste(offset, offset, content);
11336        int min = extractRangeStartFromLong(minMax);
11337        int max = extractRangeEndFromLong(minMax);
11338
11339        Selection.setSelection((Spannable) mText, max);
11340        ((Editable) mText).replace(min, max, content);
11341
11342        if (dragDropIntoItself) {
11343            int dragSourceStart = dragLocalState.start;
11344            int dragSourceEnd = dragLocalState.end;
11345            if (max <= dragSourceStart) {
11346                // Inserting text before selection has shifted positions
11347                final int shift = mText.length() - originalLength;
11348                dragSourceStart += shift;
11349                dragSourceEnd += shift;
11350            }
11351
11352            // Delete original selection
11353            ((Editable) mText).delete(dragSourceStart, dragSourceEnd);
11354
11355            // Make sure we do not leave two adjacent spaces.
11356            if ((dragSourceStart == 0 ||
11357                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart - 1))) &&
11358                    (dragSourceStart == mText.length() ||
11359                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart)))) {
11360                final int pos = dragSourceStart == mText.length() ?
11361                        dragSourceStart - 1 : dragSourceStart;
11362                ((Editable) mText).delete(pos, pos + 1);
11363            }
11364        }
11365    }
11366
11367    /**
11368     * @return True if this view supports insertion handles.
11369     */
11370    boolean hasInsertionController() {
11371        return mInsertionControllerEnabled;
11372    }
11373
11374    /**
11375     * @return True if this view supports selection handles.
11376     */
11377    boolean hasSelectionController() {
11378        return mSelectionControllerEnabled;
11379    }
11380
11381    InsertionPointCursorController getInsertionController() {
11382        if (!mInsertionControllerEnabled) {
11383            return null;
11384        }
11385
11386        if (mInsertionPointCursorController == null) {
11387            mInsertionPointCursorController = new InsertionPointCursorController();
11388
11389            final ViewTreeObserver observer = getViewTreeObserver();
11390            observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
11391        }
11392
11393        return mInsertionPointCursorController;
11394    }
11395
11396    SelectionModifierCursorController getSelectionController() {
11397        if (!mSelectionControllerEnabled) {
11398            return null;
11399        }
11400
11401        if (mSelectionModifierCursorController == null) {
11402            mSelectionModifierCursorController = new SelectionModifierCursorController();
11403
11404            final ViewTreeObserver observer = getViewTreeObserver();
11405            observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
11406        }
11407
11408        return mSelectionModifierCursorController;
11409    }
11410
11411    boolean isInBatchEditMode() {
11412        final InputMethodState ims = mInputMethodState;
11413        if (ims != null) {
11414            return ims.mBatchEditNesting > 0;
11415        }
11416        return mInBatchEditControllers;
11417    }
11418
11419    @Override
11420    protected void resolveTextDirection() {
11421        if (hasPasswordTransformationMethod()) {
11422            mTextDir = TextDirectionHeuristics.LOCALE;
11423            return;
11424        }
11425
11426        // Always need to resolve layout direction first
11427        final boolean defaultIsRtl = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL);
11428
11429        // Then resolve text direction on the parent
11430        super.resolveTextDirection();
11431
11432        // Now, we can select the heuristic
11433        int textDir = getResolvedTextDirection();
11434        switch (textDir) {
11435            default:
11436            case TEXT_DIRECTION_FIRST_STRONG:
11437                mTextDir = (defaultIsRtl ? TextDirectionHeuristics.FIRSTSTRONG_RTL :
11438                        TextDirectionHeuristics.FIRSTSTRONG_LTR);
11439                break;
11440            case TEXT_DIRECTION_ANY_RTL:
11441                mTextDir = TextDirectionHeuristics.ANYRTL_LTR;
11442                break;
11443            case TEXT_DIRECTION_LTR:
11444                mTextDir = TextDirectionHeuristics.LTR;
11445                break;
11446            case TEXT_DIRECTION_RTL:
11447                mTextDir = TextDirectionHeuristics.RTL;
11448                break;
11449        }
11450    }
11451
11452    /**
11453     * Subclasses will need to override this method to implement their own way of resolving
11454     * drawables depending on the layout direction.
11455     *
11456     * A call to the super method will be required from the subclasses implementation.
11457     *
11458     */
11459    protected void resolveDrawables() {
11460        // No need to resolve twice
11461        if (mResolvedDrawables) {
11462            return;
11463        }
11464        // No drawable to resolve
11465        if (mDrawables == null) {
11466            return;
11467        }
11468        // No relative drawable to resolve
11469        if (mDrawables.mDrawableStart == null && mDrawables.mDrawableEnd == null) {
11470            mResolvedDrawables = true;
11471            return;
11472        }
11473
11474        Drawables dr = mDrawables;
11475        switch(getResolvedLayoutDirection()) {
11476            case LAYOUT_DIRECTION_RTL:
11477                if (dr.mDrawableStart != null) {
11478                    dr.mDrawableRight = dr.mDrawableStart;
11479
11480                    dr.mDrawableSizeRight = dr.mDrawableSizeStart;
11481                    dr.mDrawableHeightRight = dr.mDrawableHeightStart;
11482                }
11483                if (dr.mDrawableEnd != null) {
11484                    dr.mDrawableLeft = dr.mDrawableEnd;
11485
11486                    dr.mDrawableSizeLeft = dr.mDrawableSizeEnd;
11487                    dr.mDrawableHeightLeft = dr.mDrawableHeightEnd;
11488                }
11489                break;
11490
11491            case LAYOUT_DIRECTION_LTR:
11492            default:
11493                if (dr.mDrawableStart != null) {
11494                    dr.mDrawableLeft = dr.mDrawableStart;
11495
11496                    dr.mDrawableSizeLeft = dr.mDrawableSizeStart;
11497                    dr.mDrawableHeightLeft = dr.mDrawableHeightStart;
11498                }
11499                if (dr.mDrawableEnd != null) {
11500                    dr.mDrawableRight = dr.mDrawableEnd;
11501
11502                    dr.mDrawableSizeRight = dr.mDrawableSizeEnd;
11503                    dr.mDrawableHeightRight = dr.mDrawableHeightEnd;
11504                }
11505                break;
11506        }
11507        mResolvedDrawables = true;
11508    }
11509
11510    protected void resetResolvedDrawables() {
11511        mResolvedDrawables = false;
11512    }
11513
11514    /**
11515     * @hide
11516     */
11517    protected void viewClicked(InputMethodManager imm) {
11518        if (imm != null) {
11519            imm.viewClicked(this);
11520        }
11521    }
11522
11523    @ViewDebug.ExportedProperty(category = "text")
11524    private CharSequence            mText;
11525    private CharSequence            mTransformed;
11526    private BufferType              mBufferType = BufferType.NORMAL;
11527
11528    private int                     mInputType = EditorInfo.TYPE_NULL;
11529    private CharSequence            mHint;
11530    private Layout                  mHintLayout;
11531
11532    private KeyListener             mInput;
11533
11534    private MovementMethod          mMovement;
11535    private TransformationMethod    mTransformation;
11536    private boolean                 mAllowTransformationLengthChange;
11537    private ChangeWatcher           mChangeWatcher;
11538
11539    private ArrayList<TextWatcher>  mListeners = null;
11540
11541    // display attributes
11542    private final TextPaint         mTextPaint;
11543    private boolean                 mUserSetTextScaleX;
11544    private final Paint             mHighlightPaint;
11545    private int                     mHighlightColor = 0x6633B5E5;
11546    /**
11547     * This is temporarily visible to fix bug 3085564 in webView. Do not rely on
11548     * this field being protected. Will be restored as private when lineHeight
11549     * feature request 3215097 is implemented
11550     * @hide
11551     */
11552    protected Layout                mLayout;
11553
11554    private long                    mShowCursor;
11555    private Blink                   mBlink;
11556    private boolean                 mCursorVisible = true;
11557
11558    // Cursor Controllers.
11559    private InsertionPointCursorController mInsertionPointCursorController;
11560    private SelectionModifierCursorController mSelectionModifierCursorController;
11561    private ActionMode              mSelectionActionMode;
11562    private boolean                 mInsertionControllerEnabled;
11563    private boolean                 mSelectionControllerEnabled;
11564    private boolean                 mInBatchEditControllers;
11565
11566    // These are needed to desambiguate a long click. If the long click comes from ones of these, we
11567    // select from the current cursor position. Otherwise, select from long pressed position.
11568    private boolean                 mDPadCenterIsDown = false;
11569    private boolean                 mEnterKeyIsDown = false;
11570    private boolean                 mContextMenuTriggeredByKey = false;
11571
11572    private boolean                 mSelectAllOnFocus = false;
11573
11574    private int                     mGravity = Gravity.TOP | Gravity.START;
11575    private boolean                 mHorizontallyScrolling;
11576
11577    private int                     mAutoLinkMask;
11578    private boolean                 mLinksClickable = true;
11579
11580    private float                   mSpacingMult = 1.0f;
11581    private float                   mSpacingAdd = 0.0f;
11582    private boolean                 mTextIsSelectable = false;
11583
11584    private static final int        LINES = 1;
11585    private static final int        EMS = LINES;
11586    private static final int        PIXELS = 2;
11587
11588    private int                     mMaximum = Integer.MAX_VALUE;
11589    private int                     mMaxMode = LINES;
11590    private int                     mMinimum = 0;
11591    private int                     mMinMode = LINES;
11592
11593    private int                     mOldMaximum = mMaximum;
11594    private int                     mOldMaxMode = mMaxMode;
11595
11596    private int                     mMaxWidth = Integer.MAX_VALUE;
11597    private int                     mMaxWidthMode = PIXELS;
11598    private int                     mMinWidth = 0;
11599    private int                     mMinWidthMode = PIXELS;
11600
11601    private boolean                 mSingleLine;
11602    private int                     mDesiredHeightAtMeasure = -1;
11603    private boolean                 mIncludePad = true;
11604
11605    // tmp primitives, so we don't alloc them on each draw
11606    private Path                    mHighlightPath;
11607    private boolean                 mHighlightPathBogus = true;
11608    private static final RectF      sTempRect = new RectF();
11609
11610    // XXX should be much larger
11611    private static final int        VERY_WIDE = 1024*1024;
11612
11613    private static final int        BLINK = 500;
11614
11615    private static final int ANIMATED_SCROLL_GAP = 250;
11616    private long mLastScroll;
11617    private Scroller mScroller = null;
11618
11619    private BoringLayout.Metrics mBoring;
11620    private BoringLayout.Metrics mHintBoring;
11621
11622    private BoringLayout mSavedLayout, mSavedHintLayout;
11623
11624    private TextDirectionHeuristic mTextDir = null;
11625
11626    private static final InputFilter[] NO_FILTERS = new InputFilter[0];
11627    private InputFilter[] mFilters = NO_FILTERS;
11628    private static final Spanned EMPTY_SPANNED = new SpannedString("");
11629    private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20;
11630    // System wide time for last cut or copy action.
11631    private static long sLastCutOrCopyTime;
11632    // Used to highlight a word when it is corrected by the IME
11633    private CorrectionHighlighter mCorrectionHighlighter;
11634    // New state used to change background based on whether this TextView is multiline.
11635    private static final int[] MULTILINE_STATE_SET = { R.attr.state_multiline };
11636}
11637