TextView.java revision 8615ac9e049cdf4ab77b0897aca9bceec142c9fa 
1/*
2 * Copyright (C) 2006 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.widget;
18
19import android.R;
20import android.content.ClipData;
21import android.content.ClipData.Item;
22import android.content.ClipboardManager;
23import android.content.Context;
24import android.content.Intent;
25import android.content.pm.PackageManager;
26import android.content.res.ColorStateList;
27import android.content.res.CompatibilityInfo;
28import android.content.res.Resources;
29import android.content.res.TypedArray;
30import android.content.res.XmlResourceParser;
31import android.graphics.Canvas;
32import android.graphics.Color;
33import android.graphics.Paint;
34import android.graphics.Path;
35import android.graphics.Rect;
36import android.graphics.RectF;
37import android.graphics.Typeface;
38import android.graphics.drawable.Drawable;
39import android.inputmethodservice.ExtractEditText;
40import android.os.Bundle;
41import android.os.Handler;
42import android.os.Message;
43import android.os.Parcel;
44import android.os.Parcelable;
45import android.os.SystemClock;
46import android.provider.Settings;
47import android.text.BoringLayout;
48import android.text.DynamicLayout;
49import android.text.Editable;
50import android.text.GetChars;
51import android.text.GraphicsOperations;
52import android.text.InputFilter;
53import android.text.InputType;
54import android.text.Layout;
55import android.text.ParcelableSpan;
56import android.text.Selection;
57import android.text.SpanWatcher;
58import android.text.Spannable;
59import android.text.SpannableString;
60import android.text.SpannableStringBuilder;
61import android.text.Spanned;
62import android.text.SpannedString;
63import android.text.StaticLayout;
64import android.text.TextDirectionHeuristic;
65import android.text.TextDirectionHeuristics;
66import android.text.TextPaint;
67import android.text.TextUtils;
68import android.text.TextUtils.TruncateAt;
69import android.text.TextWatcher;
70import android.text.method.AllCapsTransformationMethod;
71import android.text.method.ArrowKeyMovementMethod;
72import android.text.method.DateKeyListener;
73import android.text.method.DateTimeKeyListener;
74import android.text.method.DialerKeyListener;
75import android.text.method.DigitsKeyListener;
76import android.text.method.KeyListener;
77import android.text.method.LinkMovementMethod;
78import android.text.method.MetaKeyKeyListener;
79import android.text.method.MovementMethod;
80import android.text.method.PasswordTransformationMethod;
81import android.text.method.SingleLineTransformationMethod;
82import android.text.method.TextKeyListener;
83import android.text.method.TimeKeyListener;
84import android.text.method.TransformationMethod;
85import android.text.method.TransformationMethod2;
86import android.text.method.WordIterator;
87import android.text.style.ClickableSpan;
88import android.text.style.EasyEditSpan;
89import android.text.style.ParagraphStyle;
90import android.text.style.SpellCheckSpan;
91import android.text.style.SuggestionRangeSpan;
92import android.text.style.SuggestionSpan;
93import android.text.style.TextAppearanceSpan;
94import android.text.style.URLSpan;
95import android.text.style.UpdateAppearance;
96import android.text.util.Linkify;
97import android.util.AttributeSet;
98import android.util.DisplayMetrics;
99import android.util.FloatMath;
100import android.util.Log;
101import android.util.TypedValue;
102import android.view.ActionMode;
103import android.view.ActionMode.Callback;
104import android.view.DragEvent;
105import android.view.Gravity;
106import android.view.HapticFeedbackConstants;
107import android.view.KeyCharacterMap;
108import android.view.KeyEvent;
109import android.view.LayoutInflater;
110import android.view.Menu;
111import android.view.MenuItem;
112import android.view.MotionEvent;
113import android.view.View;
114import android.view.ViewConfiguration;
115import android.view.ViewDebug;
116import android.view.ViewGroup;
117import android.view.ViewGroup.LayoutParams;
118import android.view.ViewParent;
119import android.view.ViewRootImpl;
120import android.view.ViewTreeObserver;
121import android.view.WindowManager;
122import android.view.accessibility.AccessibilityEvent;
123import android.view.accessibility.AccessibilityManager;
124import android.view.accessibility.AccessibilityNodeInfo;
125import android.view.animation.AnimationUtils;
126import android.view.inputmethod.BaseInputConnection;
127import android.view.inputmethod.CompletionInfo;
128import android.view.inputmethod.CorrectionInfo;
129import android.view.inputmethod.EditorInfo;
130import android.view.inputmethod.ExtractedText;
131import android.view.inputmethod.ExtractedTextRequest;
132import android.view.inputmethod.InputConnection;
133import android.view.inputmethod.InputMethodManager;
134import android.view.textservice.SpellCheckerSubtype;
135import android.view.textservice.TextServicesManager;
136import android.widget.AdapterView.OnItemClickListener;
137import android.widget.RemoteViews.RemoteView;
138
139import com.android.internal.util.FastMath;
140import com.android.internal.widget.EditableInputConnection;
141
142import org.xmlpull.v1.XmlPullParserException;
143
144import java.io.IOException;
145import java.lang.ref.WeakReference;
146import java.text.BreakIterator;
147import java.util.ArrayList;
148import java.util.Arrays;
149import java.util.Comparator;
150import java.util.HashMap;
151import java.util.Locale;
152
153/**
154 * Displays text to the user and optionally allows them to edit it.  A TextView
155 * is a complete text editor, however the basic class is configured to not
156 * allow editing; see {@link EditText} for a subclass that configures the text
157 * view for editing.
158 *
159 * <p>
160 * <b>XML attributes</b>
161 * <p>
162 * See {@link android.R.styleable#TextView TextView Attributes},
163 * {@link android.R.styleable#View View Attributes}
164 *
165 * @attr ref android.R.styleable#TextView_text
166 * @attr ref android.R.styleable#TextView_bufferType
167 * @attr ref android.R.styleable#TextView_hint
168 * @attr ref android.R.styleable#TextView_textColor
169 * @attr ref android.R.styleable#TextView_textColorHighlight
170 * @attr ref android.R.styleable#TextView_textColorHint
171 * @attr ref android.R.styleable#TextView_textAppearance
172 * @attr ref android.R.styleable#TextView_textColorLink
173 * @attr ref android.R.styleable#TextView_textSize
174 * @attr ref android.R.styleable#TextView_textScaleX
175 * @attr ref android.R.styleable#TextView_typeface
176 * @attr ref android.R.styleable#TextView_textStyle
177 * @attr ref android.R.styleable#TextView_cursorVisible
178 * @attr ref android.R.styleable#TextView_maxLines
179 * @attr ref android.R.styleable#TextView_maxHeight
180 * @attr ref android.R.styleable#TextView_lines
181 * @attr ref android.R.styleable#TextView_height
182 * @attr ref android.R.styleable#TextView_minLines
183 * @attr ref android.R.styleable#TextView_minHeight
184 * @attr ref android.R.styleable#TextView_maxEms
185 * @attr ref android.R.styleable#TextView_maxWidth
186 * @attr ref android.R.styleable#TextView_ems
187 * @attr ref android.R.styleable#TextView_width
188 * @attr ref android.R.styleable#TextView_minEms
189 * @attr ref android.R.styleable#TextView_minWidth
190 * @attr ref android.R.styleable#TextView_gravity
191 * @attr ref android.R.styleable#TextView_scrollHorizontally
192 * @attr ref android.R.styleable#TextView_password
193 * @attr ref android.R.styleable#TextView_singleLine
194 * @attr ref android.R.styleable#TextView_selectAllOnFocus
195 * @attr ref android.R.styleable#TextView_includeFontPadding
196 * @attr ref android.R.styleable#TextView_maxLength
197 * @attr ref android.R.styleable#TextView_shadowColor
198 * @attr ref android.R.styleable#TextView_shadowDx
199 * @attr ref android.R.styleable#TextView_shadowDy
200 * @attr ref android.R.styleable#TextView_shadowRadius
201 * @attr ref android.R.styleable#TextView_autoLink
202 * @attr ref android.R.styleable#TextView_linksClickable
203 * @attr ref android.R.styleable#TextView_numeric
204 * @attr ref android.R.styleable#TextView_digits
205 * @attr ref android.R.styleable#TextView_phoneNumber
206 * @attr ref android.R.styleable#TextView_inputMethod
207 * @attr ref android.R.styleable#TextView_capitalize
208 * @attr ref android.R.styleable#TextView_autoText
209 * @attr ref android.R.styleable#TextView_editable
210 * @attr ref android.R.styleable#TextView_freezesText
211 * @attr ref android.R.styleable#TextView_ellipsize
212 * @attr ref android.R.styleable#TextView_drawableTop
213 * @attr ref android.R.styleable#TextView_drawableBottom
214 * @attr ref android.R.styleable#TextView_drawableRight
215 * @attr ref android.R.styleable#TextView_drawableLeft
216 * @attr ref android.R.styleable#TextView_drawablePadding
217 * @attr ref android.R.styleable#TextView_lineSpacingExtra
218 * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
219 * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
220 * @attr ref android.R.styleable#TextView_inputType
221 * @attr ref android.R.styleable#TextView_imeOptions
222 * @attr ref android.R.styleable#TextView_privateImeOptions
223 * @attr ref android.R.styleable#TextView_imeActionLabel
224 * @attr ref android.R.styleable#TextView_imeActionId
225 * @attr ref android.R.styleable#TextView_editorExtras
226 */
227@RemoteView
228public class TextView extends View implements ViewTreeObserver.OnPreDrawListener {
229    static final String LOG_TAG = "TextView";
230    static final boolean DEBUG_EXTRACT = false;
231
232    private static final int PRIORITY = 100;
233    private int mCurrentAlpha = 255;
234
235    final int[] mTempCoords = new int[2];
236    Rect mTempRect;
237
238    private ColorStateList mTextColor;
239    private int mCurTextColor;
240    private ColorStateList mHintTextColor;
241    private ColorStateList mLinkTextColor;
242    private int mCurHintTextColor;
243    private boolean mFreezesText;
244    private boolean mFrozenWithFocus;
245    private boolean mTemporaryDetach;
246    private boolean mDispatchTemporaryDetach;
247
248    private boolean mDiscardNextActionUp = false;
249    private boolean mIgnoreActionUpEvent = false;
250
251    private Editable.Factory mEditableFactory = Editable.Factory.getInstance();
252    private Spannable.Factory mSpannableFactory = Spannable.Factory.getInstance();
253
254    private float mShadowRadius, mShadowDx, mShadowDy;
255
256    private static final int PREDRAW_NOT_REGISTERED = 0;
257    private static final int PREDRAW_PENDING = 1;
258    private static final int PREDRAW_DONE = 2;
259    private int mPreDrawState = PREDRAW_NOT_REGISTERED;
260
261    private TextUtils.TruncateAt mEllipsize = null;
262
263    // Enum for the "typeface" XML parameter.
264    // TODO: How can we get this from the XML instead of hardcoding it here?
265    private static final int SANS = 1;
266    private static final int SERIF = 2;
267    private static final int MONOSPACE = 3;
268
269    // Bitfield for the "numeric" XML parameter.
270    // TODO: How can we get this from the XML instead of hardcoding it here?
271    private static final int SIGNED = 2;
272    private static final int DECIMAL = 4;
273
274    static class Drawables {
275        final Rect mCompoundRect = new Rect();
276        Drawable mDrawableTop, mDrawableBottom, mDrawableLeft, mDrawableRight,
277                mDrawableStart, mDrawableEnd;
278        int mDrawableSizeTop, mDrawableSizeBottom, mDrawableSizeLeft, mDrawableSizeRight,
279                mDrawableSizeStart, mDrawableSizeEnd;
280        int mDrawableWidthTop, mDrawableWidthBottom, mDrawableHeightLeft, mDrawableHeightRight,
281                mDrawableHeightStart, mDrawableHeightEnd;
282        int mDrawablePadding;
283    }
284    private Drawables mDrawables;
285
286    private CharSequence mError;
287    private boolean mErrorWasChanged;
288    private ErrorPopup mPopup;
289    /**
290     * This flag is set if the TextView tries to display an error before it
291     * is attached to the window (so its position is still unknown).
292     * It causes the error to be shown later, when onAttachedToWindow()
293     * is called.
294     */
295    private boolean mShowErrorAfterAttach;
296
297    private CharWrapper mCharWrapper = null;
298
299    private boolean mSelectionMoved = false;
300    private boolean mTouchFocusSelected = false;
301
302    private Marquee mMarquee;
303    private boolean mRestartMarquee;
304
305    private int mMarqueeRepeatLimit = 3;
306
307    static class InputContentType {
308        int imeOptions = EditorInfo.IME_NULL;
309        String privateImeOptions;
310        CharSequence imeActionLabel;
311        int imeActionId;
312        Bundle extras;
313        OnEditorActionListener onEditorActionListener;
314        boolean enterDown;
315    }
316    InputContentType mInputContentType;
317
318    static class InputMethodState {
319        Rect mCursorRectInWindow = new Rect();
320        RectF mTmpRectF = new RectF();
321        float[] mTmpOffset = new float[2];
322        ExtractedTextRequest mExtracting;
323        final ExtractedText mTmpExtracted = new ExtractedText();
324        int mBatchEditNesting;
325        boolean mCursorChanged;
326        boolean mSelectionModeChanged;
327        boolean mContentChanged;
328        int mChangedStart, mChangedEnd, mChangedDelta;
329    }
330    InputMethodState mInputMethodState;
331
332    private int mTextSelectHandleLeftRes;
333    private int mTextSelectHandleRightRes;
334    private int mTextSelectHandleRes;
335
336    private int mTextEditSuggestionItemLayout;
337    private SuggestionsPopupWindow mSuggestionsPopupWindow;
338    private SuggestionRangeSpan mSuggestionRangeSpan;
339
340    private int mCursorDrawableRes;
341    private final Drawable[] mCursorDrawable = new Drawable[2];
342    private int mCursorCount; // Actual current number of used mCursorDrawable: 0, 1 or 2
343
344    private Drawable mSelectHandleLeft;
345    private Drawable mSelectHandleRight;
346    private Drawable mSelectHandleCenter;
347
348    // Global listener that detects changes in the global position of the TextView
349    private PositionListener mPositionListener;
350
351    private float mLastDownPositionX, mLastDownPositionY;
352    private Callback mCustomSelectionActionModeCallback;
353
354    private final int mSquaredTouchSlopDistance;
355    // Set when this TextView gained focus with some text selected. Will start selection mode.
356    private boolean mCreatedWithASelection = false;
357
358    private WordIterator mWordIterator;
359
360    private SpellChecker mSpellChecker;
361
362    private boolean mSoftInputShownOnFocus = true;
363
364    // The alignment to pass to Layout, or null if not resolved.
365    private Layout.Alignment mLayoutAlignment;
366
367    // The default value for mTextAlign.
368    private TextAlign mTextAlign = TextAlign.INHERIT;
369
370    private static enum TextAlign {
371        INHERIT, GRAVITY, TEXT_START, TEXT_END, CENTER, VIEW_START, VIEW_END;
372    }
373
374    private boolean mResolvedDrawables = false;
375
376    /**
377     * On some devices the fading edges add a performance penalty if used
378     * extensively in the same layout. This mode indicates how the marquee
379     * is currently being shown, if applicable. (mEllipsize will == MARQUEE)
380     */
381    private int mMarqueeFadeMode = MARQUEE_FADE_NORMAL;
382
383    /**
384     * When mMarqueeFadeMode is not MARQUEE_FADE_NORMAL, this stores
385     * the layout that should be used when the mode switches.
386     */
387    private Layout mSavedMarqueeModeLayout;
388
389    /**
390     * Draw marquee text with fading edges as usual
391     */
392    private static final int MARQUEE_FADE_NORMAL = 0;
393
394    /**
395     * Draw marquee text as ellipsize end while inactive instead of with the fade.
396     * (Useful for devices where the fade can be expensive if overdone)
397     */
398    private static final int MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS = 1;
399
400    /**
401     * Draw marquee text with fading edges because it is currently active/animating.
402     */
403    private static final int MARQUEE_FADE_SWITCH_SHOW_FADE = 2;
404
405    /*
406     * Kick-start the font cache for the zygote process (to pay the cost of
407     * initializing freetype for our default font only once).
408     */
409    static {
410        Paint p = new Paint();
411        p.setAntiAlias(true);
412        // We don't care about the result, just the side-effect of measuring.
413        p.measureText("H");
414    }
415
416    /**
417     * Interface definition for a callback to be invoked when an action is
418     * performed on the editor.
419     */
420    public interface OnEditorActionListener {
421        /**
422         * Called when an action is being performed.
423         *
424         * @param v The view that was clicked.
425         * @param actionId Identifier of the action.  This will be either the
426         * identifier you supplied, or {@link EditorInfo#IME_NULL
427         * EditorInfo.IME_NULL} if being called due to the enter key
428         * being pressed.
429         * @param event If triggered by an enter key, this is the event;
430         * otherwise, this is null.
431         * @return Return true if you have consumed the action, else false.
432         */
433        boolean onEditorAction(TextView v, int actionId, KeyEvent event);
434    }
435
436    public TextView(Context context) {
437        this(context, null);
438    }
439
440    public TextView(Context context,
441                    AttributeSet attrs) {
442        this(context, attrs, com.android.internal.R.attr.textViewStyle);
443    }
444
445    @SuppressWarnings("deprecation")
446    public TextView(Context context,
447                    AttributeSet attrs,
448                    int defStyle) {
449        super(context, attrs, defStyle);
450        mText = "";
451
452        final Resources res = getResources();
453        final CompatibilityInfo compat = res.getCompatibilityInfo();
454
455        mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
456        mTextPaint.density = res.getDisplayMetrics().density;
457        mTextPaint.setCompatibilityScaling(compat.applicationScale);
458
459        // If we get the paint from the skin, we should set it to left, since
460        // the layout always wants it to be left.
461        // mTextPaint.setTextAlign(Paint.Align.LEFT);
462
463        mHighlightPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
464        mHighlightPaint.setCompatibilityScaling(compat.applicationScale);
465
466        mMovement = getDefaultMovementMethod();
467        mTransformation = null;
468
469        int textColorHighlight = 0;
470        ColorStateList textColor = null;
471        ColorStateList textColorHint = null;
472        ColorStateList textColorLink = null;
473        int textSize = 15;
474        int typefaceIndex = -1;
475        int styleIndex = -1;
476        boolean allCaps = false;
477
478        final Resources.Theme theme = context.getTheme();
479
480        /*
481         * Look the appearance up without checking first if it exists because
482         * almost every TextView has one and it greatly simplifies the logic
483         * to be able to parse the appearance first and then let specific tags
484         * for this View override it.
485         */
486        TypedArray a = theme.obtainStyledAttributes(
487                    attrs, com.android.internal.R.styleable.TextViewAppearance, defStyle, 0);
488        TypedArray appearance = null;
489        int ap = a.getResourceId(
490                com.android.internal.R.styleable.TextViewAppearance_textAppearance, -1);
491        a.recycle();
492        if (ap != -1) {
493            appearance = theme.obtainStyledAttributes(
494                    ap, com.android.internal.R.styleable.TextAppearance);
495        }
496        if (appearance != null) {
497            int n = appearance.getIndexCount();
498            for (int i = 0; i < n; i++) {
499                int attr = appearance.getIndex(i);
500
501                switch (attr) {
502                case com.android.internal.R.styleable.TextAppearance_textColorHighlight:
503                    textColorHighlight = appearance.getColor(attr, textColorHighlight);
504                    break;
505
506                case com.android.internal.R.styleable.TextAppearance_textColor:
507                    textColor = appearance.getColorStateList(attr);
508                    break;
509
510                case com.android.internal.R.styleable.TextAppearance_textColorHint:
511                    textColorHint = appearance.getColorStateList(attr);
512                    break;
513
514                case com.android.internal.R.styleable.TextAppearance_textColorLink:
515                    textColorLink = appearance.getColorStateList(attr);
516                    break;
517
518                case com.android.internal.R.styleable.TextAppearance_textSize:
519                    textSize = appearance.getDimensionPixelSize(attr, textSize);
520                    break;
521
522                case com.android.internal.R.styleable.TextAppearance_typeface:
523                    typefaceIndex = appearance.getInt(attr, -1);
524                    break;
525
526                case com.android.internal.R.styleable.TextAppearance_textStyle:
527                    styleIndex = appearance.getInt(attr, -1);
528                    break;
529
530                case com.android.internal.R.styleable.TextAppearance_textAllCaps:
531                    allCaps = appearance.getBoolean(attr, false);
532                    break;
533                }
534            }
535
536            appearance.recycle();
537        }
538
539        boolean editable = getDefaultEditable();
540        CharSequence inputMethod = null;
541        int numeric = 0;
542        CharSequence digits = null;
543        boolean phone = false;
544        boolean autotext = false;
545        int autocap = -1;
546        int buffertype = 0;
547        boolean selectallonfocus = false;
548        Drawable drawableLeft = null, drawableTop = null, drawableRight = null,
549            drawableBottom = null, drawableStart = null, drawableEnd = null;
550        int drawablePadding = 0;
551        int ellipsize = -1;
552        boolean singleLine = false;
553        int maxlength = -1;
554        CharSequence text = "";
555        CharSequence hint = null;
556        int shadowcolor = 0;
557        float dx = 0, dy = 0, r = 0;
558        boolean password = false;
559        int inputType = EditorInfo.TYPE_NULL;
560
561        a = theme.obtainStyledAttributes(
562                    attrs, com.android.internal.R.styleable.TextView, defStyle, 0);
563
564        int n = a.getIndexCount();
565        for (int i = 0; i < n; i++) {
566            int attr = a.getIndex(i);
567
568            switch (attr) {
569            case com.android.internal.R.styleable.TextView_editable:
570                editable = a.getBoolean(attr, editable);
571                break;
572
573            case com.android.internal.R.styleable.TextView_inputMethod:
574                inputMethod = a.getText(attr);
575                break;
576
577            case com.android.internal.R.styleable.TextView_numeric:
578                numeric = a.getInt(attr, numeric);
579                break;
580
581            case com.android.internal.R.styleable.TextView_digits:
582                digits = a.getText(attr);
583                break;
584
585            case com.android.internal.R.styleable.TextView_phoneNumber:
586                phone = a.getBoolean(attr, phone);
587                break;
588
589            case com.android.internal.R.styleable.TextView_autoText:
590                autotext = a.getBoolean(attr, autotext);
591                break;
592
593            case com.android.internal.R.styleable.TextView_capitalize:
594                autocap = a.getInt(attr, autocap);
595                break;
596
597            case com.android.internal.R.styleable.TextView_bufferType:
598                buffertype = a.getInt(attr, buffertype);
599                break;
600
601            case com.android.internal.R.styleable.TextView_selectAllOnFocus:
602                selectallonfocus = a.getBoolean(attr, selectallonfocus);
603                break;
604
605            case com.android.internal.R.styleable.TextView_autoLink:
606                mAutoLinkMask = a.getInt(attr, 0);
607                break;
608
609            case com.android.internal.R.styleable.TextView_linksClickable:
610                mLinksClickable = a.getBoolean(attr, true);
611                break;
612
613//            TODO uncomment when this attribute is made public in the next release
614//                 also add TextView_showSoftInputOnFocus to the list of attributes above
615//            case com.android.internal.R.styleable.TextView_showSoftInputOnFocus:
616//                setShowSoftInputOnFocus(a.getBoolean(attr, true));
617//                break;
618
619            case com.android.internal.R.styleable.TextView_drawableLeft:
620                drawableLeft = a.getDrawable(attr);
621                break;
622
623            case com.android.internal.R.styleable.TextView_drawableTop:
624                drawableTop = a.getDrawable(attr);
625                break;
626
627            case com.android.internal.R.styleable.TextView_drawableRight:
628                drawableRight = a.getDrawable(attr);
629                break;
630
631            case com.android.internal.R.styleable.TextView_drawableBottom:
632                drawableBottom = a.getDrawable(attr);
633                break;
634
635            case com.android.internal.R.styleable.TextView_drawableStart:
636                drawableStart = a.getDrawable(attr);
637                break;
638
639            case com.android.internal.R.styleable.TextView_drawableEnd:
640                drawableEnd = a.getDrawable(attr);
641                break;
642
643            case com.android.internal.R.styleable.TextView_drawablePadding:
644                drawablePadding = a.getDimensionPixelSize(attr, drawablePadding);
645                break;
646
647            case com.android.internal.R.styleable.TextView_maxLines:
648                setMaxLines(a.getInt(attr, -1));
649                break;
650
651            case com.android.internal.R.styleable.TextView_maxHeight:
652                setMaxHeight(a.getDimensionPixelSize(attr, -1));
653                break;
654
655            case com.android.internal.R.styleable.TextView_lines:
656                setLines(a.getInt(attr, -1));
657                break;
658
659            case com.android.internal.R.styleable.TextView_height:
660                setHeight(a.getDimensionPixelSize(attr, -1));
661                break;
662
663            case com.android.internal.R.styleable.TextView_minLines:
664                setMinLines(a.getInt(attr, -1));
665                break;
666
667            case com.android.internal.R.styleable.TextView_minHeight:
668                setMinHeight(a.getDimensionPixelSize(attr, -1));
669                break;
670
671            case com.android.internal.R.styleable.TextView_maxEms:
672                setMaxEms(a.getInt(attr, -1));
673                break;
674
675            case com.android.internal.R.styleable.TextView_maxWidth:
676                setMaxWidth(a.getDimensionPixelSize(attr, -1));
677                break;
678
679            case com.android.internal.R.styleable.TextView_ems:
680                setEms(a.getInt(attr, -1));
681                break;
682
683            case com.android.internal.R.styleable.TextView_width:
684                setWidth(a.getDimensionPixelSize(attr, -1));
685                break;
686
687            case com.android.internal.R.styleable.TextView_minEms:
688                setMinEms(a.getInt(attr, -1));
689                break;
690
691            case com.android.internal.R.styleable.TextView_minWidth:
692                setMinWidth(a.getDimensionPixelSize(attr, -1));
693                break;
694
695            case com.android.internal.R.styleable.TextView_gravity:
696                setGravity(a.getInt(attr, -1));
697                break;
698
699            case com.android.internal.R.styleable.TextView_hint:
700                hint = a.getText(attr);
701                break;
702
703            case com.android.internal.R.styleable.TextView_text:
704                text = a.getText(attr);
705                break;
706
707            case com.android.internal.R.styleable.TextView_scrollHorizontally:
708                if (a.getBoolean(attr, false)) {
709                    setHorizontallyScrolling(true);
710                }
711                break;
712
713            case com.android.internal.R.styleable.TextView_singleLine:
714                singleLine = a.getBoolean(attr, singleLine);
715                break;
716
717            case com.android.internal.R.styleable.TextView_ellipsize:
718                ellipsize = a.getInt(attr, ellipsize);
719                break;
720
721            case com.android.internal.R.styleable.TextView_marqueeRepeatLimit:
722                setMarqueeRepeatLimit(a.getInt(attr, mMarqueeRepeatLimit));
723                break;
724
725            case com.android.internal.R.styleable.TextView_includeFontPadding:
726                if (!a.getBoolean(attr, true)) {
727                    setIncludeFontPadding(false);
728                }
729                break;
730
731            case com.android.internal.R.styleable.TextView_cursorVisible:
732                if (!a.getBoolean(attr, true)) {
733                    setCursorVisible(false);
734                }
735                break;
736
737            case com.android.internal.R.styleable.TextView_maxLength:
738                maxlength = a.getInt(attr, -1);
739                break;
740
741            case com.android.internal.R.styleable.TextView_textScaleX:
742                setTextScaleX(a.getFloat(attr, 1.0f));
743                break;
744
745            case com.android.internal.R.styleable.TextView_freezesText:
746                mFreezesText = a.getBoolean(attr, false);
747                break;
748
749            case com.android.internal.R.styleable.TextView_shadowColor:
750                shadowcolor = a.getInt(attr, 0);
751                break;
752
753            case com.android.internal.R.styleable.TextView_shadowDx:
754                dx = a.getFloat(attr, 0);
755                break;
756
757            case com.android.internal.R.styleable.TextView_shadowDy:
758                dy = a.getFloat(attr, 0);
759                break;
760
761            case com.android.internal.R.styleable.TextView_shadowRadius:
762                r = a.getFloat(attr, 0);
763                break;
764
765            case com.android.internal.R.styleable.TextView_enabled:
766                setEnabled(a.getBoolean(attr, isEnabled()));
767                break;
768
769            case com.android.internal.R.styleable.TextView_textColorHighlight:
770                textColorHighlight = a.getColor(attr, textColorHighlight);
771                break;
772
773            case com.android.internal.R.styleable.TextView_textColor:
774                textColor = a.getColorStateList(attr);
775                break;
776
777            case com.android.internal.R.styleable.TextView_textColorHint:
778                textColorHint = a.getColorStateList(attr);
779                break;
780
781            case com.android.internal.R.styleable.TextView_textColorLink:
782                textColorLink = a.getColorStateList(attr);
783                break;
784
785            case com.android.internal.R.styleable.TextView_textSize:
786                textSize = a.getDimensionPixelSize(attr, textSize);
787                break;
788
789            case com.android.internal.R.styleable.TextView_typeface:
790                typefaceIndex = a.getInt(attr, typefaceIndex);
791                break;
792
793            case com.android.internal.R.styleable.TextView_textStyle:
794                styleIndex = a.getInt(attr, styleIndex);
795                break;
796
797            case com.android.internal.R.styleable.TextView_password:
798                password = a.getBoolean(attr, password);
799                break;
800
801            case com.android.internal.R.styleable.TextView_lineSpacingExtra:
802                mSpacingAdd = a.getDimensionPixelSize(attr, (int) mSpacingAdd);
803                break;
804
805            case com.android.internal.R.styleable.TextView_lineSpacingMultiplier:
806                mSpacingMult = a.getFloat(attr, mSpacingMult);
807                break;
808
809            case com.android.internal.R.styleable.TextView_inputType:
810                inputType = a.getInt(attr, mInputType);
811                break;
812
813            case com.android.internal.R.styleable.TextView_imeOptions:
814                if (mInputContentType == null) {
815                    mInputContentType = new InputContentType();
816                }
817                mInputContentType.imeOptions = a.getInt(attr,
818                        mInputContentType.imeOptions);
819                break;
820
821            case com.android.internal.R.styleable.TextView_imeActionLabel:
822                if (mInputContentType == null) {
823                    mInputContentType = new InputContentType();
824                }
825                mInputContentType.imeActionLabel = a.getText(attr);
826                break;
827
828            case com.android.internal.R.styleable.TextView_imeActionId:
829                if (mInputContentType == null) {
830                    mInputContentType = new InputContentType();
831                }
832                mInputContentType.imeActionId = a.getInt(attr,
833                        mInputContentType.imeActionId);
834                break;
835
836            case com.android.internal.R.styleable.TextView_privateImeOptions:
837                setPrivateImeOptions(a.getString(attr));
838                break;
839
840            case com.android.internal.R.styleable.TextView_editorExtras:
841                try {
842                    setInputExtras(a.getResourceId(attr, 0));
843                } catch (XmlPullParserException e) {
844                    Log.w(LOG_TAG, "Failure reading input extras", e);
845                } catch (IOException e) {
846                    Log.w(LOG_TAG, "Failure reading input extras", e);
847                }
848                break;
849
850            case com.android.internal.R.styleable.TextView_textCursorDrawable:
851                mCursorDrawableRes = a.getResourceId(attr, 0);
852                break;
853
854            case com.android.internal.R.styleable.TextView_textSelectHandleLeft:
855                mTextSelectHandleLeftRes = a.getResourceId(attr, 0);
856                break;
857
858            case com.android.internal.R.styleable.TextView_textSelectHandleRight:
859                mTextSelectHandleRightRes = a.getResourceId(attr, 0);
860                break;
861
862            case com.android.internal.R.styleable.TextView_textSelectHandle:
863                mTextSelectHandleRes = a.getResourceId(attr, 0);
864                break;
865
866            case com.android.internal.R.styleable.TextView_textEditSuggestionItemLayout:
867                mTextEditSuggestionItemLayout = a.getResourceId(attr, 0);
868                break;
869
870            case com.android.internal.R.styleable.TextView_textIsSelectable:
871                mTextIsSelectable = a.getBoolean(attr, false);
872                break;
873
874            case com.android.internal.R.styleable.TextView_textAllCaps:
875                allCaps = a.getBoolean(attr, false);
876                break;
877            }
878        }
879        a.recycle();
880
881        BufferType bufferType = BufferType.EDITABLE;
882
883        final int variation =
884                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
885        final boolean passwordInputType = variation
886                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD);
887        final boolean webPasswordInputType = variation
888                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD);
889        final boolean numberPasswordInputType = variation
890                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
891
892        if (inputMethod != null) {
893            Class<?> c;
894
895            try {
896                c = Class.forName(inputMethod.toString());
897            } catch (ClassNotFoundException ex) {
898                throw new RuntimeException(ex);
899            }
900
901            try {
902                mInput = (KeyListener) c.newInstance();
903            } catch (InstantiationException ex) {
904                throw new RuntimeException(ex);
905            } catch (IllegalAccessException ex) {
906                throw new RuntimeException(ex);
907            }
908            try {
909                mInputType = inputType != EditorInfo.TYPE_NULL
910                        ? inputType
911                        : mInput.getInputType();
912            } catch (IncompatibleClassChangeError e) {
913                mInputType = EditorInfo.TYPE_CLASS_TEXT;
914            }
915        } else if (digits != null) {
916            mInput = DigitsKeyListener.getInstance(digits.toString());
917            // If no input type was specified, we will default to generic
918            // text, since we can't tell the IME about the set of digits
919            // that was selected.
920            mInputType = inputType != EditorInfo.TYPE_NULL
921                    ? inputType : EditorInfo.TYPE_CLASS_TEXT;
922        } else if (inputType != EditorInfo.TYPE_NULL) {
923            setInputType(inputType, true);
924            // If set, the input type overrides what was set using the deprecated singleLine flag.
925            singleLine = !isMultilineInputType(inputType);
926        } else if (phone) {
927            mInput = DialerKeyListener.getInstance();
928            mInputType = inputType = EditorInfo.TYPE_CLASS_PHONE;
929        } else if (numeric != 0) {
930            mInput = DigitsKeyListener.getInstance((numeric & SIGNED) != 0,
931                                                   (numeric & DECIMAL) != 0);
932            inputType = EditorInfo.TYPE_CLASS_NUMBER;
933            if ((numeric & SIGNED) != 0) {
934                inputType |= EditorInfo.TYPE_NUMBER_FLAG_SIGNED;
935            }
936            if ((numeric & DECIMAL) != 0) {
937                inputType |= EditorInfo.TYPE_NUMBER_FLAG_DECIMAL;
938            }
939            mInputType = inputType;
940        } else if (autotext || autocap != -1) {
941            TextKeyListener.Capitalize cap;
942
943            inputType = EditorInfo.TYPE_CLASS_TEXT;
944
945            switch (autocap) {
946            case 1:
947                cap = TextKeyListener.Capitalize.SENTENCES;
948                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES;
949                break;
950
951            case 2:
952                cap = TextKeyListener.Capitalize.WORDS;
953                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS;
954                break;
955
956            case 3:
957                cap = TextKeyListener.Capitalize.CHARACTERS;
958                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS;
959                break;
960
961            default:
962                cap = TextKeyListener.Capitalize.NONE;
963                break;
964            }
965
966            mInput = TextKeyListener.getInstance(autotext, cap);
967            mInputType = inputType;
968        } else if (mTextIsSelectable) {
969            // Prevent text changes from keyboard.
970            mInputType = EditorInfo.TYPE_NULL;
971            mInput = null;
972            bufferType = BufferType.SPANNABLE;
973            // Required to request focus while in touch mode.
974            setFocusableInTouchMode(true);
975            // So that selection can be changed using arrow keys and touch is handled.
976            setMovementMethod(ArrowKeyMovementMethod.getInstance());
977        } else if (editable) {
978            mInput = TextKeyListener.getInstance();
979            mInputType = EditorInfo.TYPE_CLASS_TEXT;
980        } else {
981            mInput = null;
982
983            switch (buffertype) {
984                case 0:
985                    bufferType = BufferType.NORMAL;
986                    break;
987                case 1:
988                    bufferType = BufferType.SPANNABLE;
989                    break;
990                case 2:
991                    bufferType = BufferType.EDITABLE;
992                    break;
993            }
994        }
995
996        // mInputType has been set from inputType, possibly modified by mInputMethod.
997        // Specialize mInputType to [web]password if we have a text class and the original input
998        // type was a password.
999        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
1000            if (password || passwordInputType) {
1001                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
1002                        | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD;
1003            }
1004            if (webPasswordInputType) {
1005                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
1006                        | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD;
1007            }
1008        } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) {
1009            if (numberPasswordInputType) {
1010                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
1011                        | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD;
1012            }
1013        }
1014
1015        if (selectallonfocus) {
1016            mSelectAllOnFocus = true;
1017
1018            if (bufferType == BufferType.NORMAL)
1019                bufferType = BufferType.SPANNABLE;
1020        }
1021
1022        setCompoundDrawablesWithIntrinsicBounds(
1023            drawableLeft, drawableTop, drawableRight, drawableBottom);
1024        setRelativeDrawablesIfNeeded(drawableStart, drawableEnd);
1025        setCompoundDrawablePadding(drawablePadding);
1026
1027        // Same as setSingleLine(), but make sure the transformation method and the maximum number
1028        // of lines of height are unchanged for multi-line TextViews.
1029        setInputTypeSingleLine(singleLine);
1030        applySingleLine(singleLine, singleLine, singleLine);
1031
1032        if (singleLine && mInput == null && ellipsize < 0) {
1033                ellipsize = 3; // END
1034        }
1035
1036        switch (ellipsize) {
1037            case 1:
1038                setEllipsize(TextUtils.TruncateAt.START);
1039                break;
1040            case 2:
1041                setEllipsize(TextUtils.TruncateAt.MIDDLE);
1042                break;
1043            case 3:
1044                setEllipsize(TextUtils.TruncateAt.END);
1045                break;
1046            case 4:
1047                if (ViewConfiguration.get(context).isFadingMarqueeEnabled()) {
1048                    setHorizontalFadingEdgeEnabled(true);
1049                    mMarqueeFadeMode = MARQUEE_FADE_NORMAL;
1050                } else {
1051                    setHorizontalFadingEdgeEnabled(false);
1052                    mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
1053                }
1054                setEllipsize(TextUtils.TruncateAt.MARQUEE);
1055                break;
1056        }
1057
1058        setTextColor(textColor != null ? textColor : ColorStateList.valueOf(0xFF000000));
1059        setHintTextColor(textColorHint);
1060        setLinkTextColor(textColorLink);
1061        if (textColorHighlight != 0) {
1062            setHighlightColor(textColorHighlight);
1063        }
1064        setRawTextSize(textSize);
1065
1066        if (allCaps) {
1067            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
1068        }
1069
1070        if (password || passwordInputType || webPasswordInputType || numberPasswordInputType) {
1071            setTransformationMethod(PasswordTransformationMethod.getInstance());
1072            typefaceIndex = MONOSPACE;
1073        } else if ((mInputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION))
1074                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)) {
1075            typefaceIndex = MONOSPACE;
1076        }
1077
1078        setTypefaceByIndex(typefaceIndex, styleIndex);
1079
1080        if (shadowcolor != 0) {
1081            setShadowLayer(r, dx, dy, shadowcolor);
1082        }
1083
1084        if (maxlength >= 0) {
1085            setFilters(new InputFilter[] { new InputFilter.LengthFilter(maxlength) });
1086        } else {
1087            setFilters(NO_FILTERS);
1088        }
1089
1090        setText(text, bufferType);
1091        if (hint != null) setHint(hint);
1092
1093        /*
1094         * Views are not normally focusable unless specified to be.
1095         * However, TextViews that have input or movement methods *are*
1096         * focusable by default.
1097         */
1098        a = context.obtainStyledAttributes(attrs,
1099                                           com.android.internal.R.styleable.View,
1100                                           defStyle, 0);
1101
1102        boolean focusable = mMovement != null || mInput != null;
1103        boolean clickable = focusable;
1104        boolean longClickable = focusable;
1105
1106        n = a.getIndexCount();
1107        for (int i = 0; i < n; i++) {
1108            int attr = a.getIndex(i);
1109
1110            switch (attr) {
1111            case com.android.internal.R.styleable.View_focusable:
1112                focusable = a.getBoolean(attr, focusable);
1113                break;
1114
1115            case com.android.internal.R.styleable.View_clickable:
1116                clickable = a.getBoolean(attr, clickable);
1117                break;
1118
1119            case com.android.internal.R.styleable.View_longClickable:
1120                longClickable = a.getBoolean(attr, longClickable);
1121                break;
1122            }
1123        }
1124        a.recycle();
1125
1126        setFocusable(focusable);
1127        setClickable(clickable);
1128        setLongClickable(longClickable);
1129
1130        prepareCursorControllers();
1131
1132        final ViewConfiguration viewConfiguration = ViewConfiguration.get(context);
1133        final int touchSlop = viewConfiguration.getScaledTouchSlop();
1134        mSquaredTouchSlopDistance = touchSlop * touchSlop;
1135    }
1136
1137    private void setTypefaceByIndex(int typefaceIndex, int styleIndex) {
1138        Typeface tf = null;
1139        switch (typefaceIndex) {
1140            case SANS:
1141                tf = Typeface.SANS_SERIF;
1142                break;
1143
1144            case SERIF:
1145                tf = Typeface.SERIF;
1146                break;
1147
1148            case MONOSPACE:
1149                tf = Typeface.MONOSPACE;
1150                break;
1151        }
1152
1153        setTypeface(tf, styleIndex);
1154    }
1155
1156    private void setRelativeDrawablesIfNeeded(Drawable start, Drawable end) {
1157        boolean hasRelativeDrawables = (start != null) || (end != null);
1158        if (hasRelativeDrawables) {
1159            Drawables dr = mDrawables;
1160            if (dr == null) {
1161                mDrawables = dr = new Drawables();
1162            }
1163            final Rect compoundRect = dr.mCompoundRect;
1164            int[] state = getDrawableState();
1165            if (start != null) {
1166                start.setBounds(0, 0, start.getIntrinsicWidth(), start.getIntrinsicHeight());
1167                start.setState(state);
1168                start.copyBounds(compoundRect);
1169                start.setCallback(this);
1170
1171                dr.mDrawableStart = start;
1172                dr.mDrawableSizeStart = compoundRect.width();
1173                dr.mDrawableHeightStart = compoundRect.height();
1174            } else {
1175                dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1176            }
1177            if (end != null) {
1178                end.setBounds(0, 0, end.getIntrinsicWidth(), end.getIntrinsicHeight());
1179                end.setState(state);
1180                end.copyBounds(compoundRect);
1181                end.setCallback(this);
1182
1183                dr.mDrawableEnd = end;
1184                dr.mDrawableSizeEnd = compoundRect.width();
1185                dr.mDrawableHeightEnd = compoundRect.height();
1186            } else {
1187                dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1188            }
1189        }
1190    }
1191
1192    @Override
1193    public void setEnabled(boolean enabled) {
1194        if (enabled == isEnabled()) {
1195            return;
1196        }
1197
1198        if (!enabled) {
1199            // Hide the soft input if the currently active TextView is disabled
1200            InputMethodManager imm = InputMethodManager.peekInstance();
1201            if (imm != null && imm.isActive(this)) {
1202                imm.hideSoftInputFromWindow(getWindowToken(), 0);
1203            }
1204        }
1205        super.setEnabled(enabled);
1206        prepareCursorControllers();
1207        if (enabled) {
1208            // Make sure IME is updated with current editor info.
1209            InputMethodManager imm = InputMethodManager.peekInstance();
1210            if (imm != null) imm.restartInput(this);
1211        }
1212    }
1213
1214    /**
1215     * Sets the typeface and style in which the text should be displayed,
1216     * and turns on the fake bold and italic bits in the Paint if the
1217     * Typeface that you provided does not have all the bits in the
1218     * style that you specified.
1219     *
1220     * @attr ref android.R.styleable#TextView_typeface
1221     * @attr ref android.R.styleable#TextView_textStyle
1222     */
1223    public void setTypeface(Typeface tf, int style) {
1224        if (style > 0) {
1225            if (tf == null) {
1226                tf = Typeface.defaultFromStyle(style);
1227            } else {
1228                tf = Typeface.create(tf, style);
1229            }
1230
1231            setTypeface(tf);
1232            // now compute what (if any) algorithmic styling is needed
1233            int typefaceStyle = tf != null ? tf.getStyle() : 0;
1234            int need = style & ~typefaceStyle;
1235            mTextPaint.setFakeBoldText((need & Typeface.BOLD) != 0);
1236            mTextPaint.setTextSkewX((need & Typeface.ITALIC) != 0 ? -0.25f : 0);
1237        } else {
1238            mTextPaint.setFakeBoldText(false);
1239            mTextPaint.setTextSkewX(0);
1240            setTypeface(tf);
1241        }
1242    }
1243
1244    /**
1245     * Subclasses override this to specify that they have a KeyListener
1246     * by default even if not specifically called for in the XML options.
1247     */
1248    protected boolean getDefaultEditable() {
1249        return false;
1250    }
1251
1252    /**
1253     * Subclasses override this to specify a default movement method.
1254     */
1255    protected MovementMethod getDefaultMovementMethod() {
1256        return null;
1257    }
1258
1259    /**
1260     * Return the text the TextView is displaying. If setText() was called with
1261     * an argument of BufferType.SPANNABLE or BufferType.EDITABLE, you can cast
1262     * the return value from this method to Spannable or Editable, respectively.
1263     *
1264     * Note: The content of the return value should not be modified. If you want
1265     * a modifiable one, you should make your own copy first.
1266     */
1267    @ViewDebug.CapturedViewProperty
1268    public CharSequence getText() {
1269        return mText;
1270    }
1271
1272    /**
1273     * Returns the length, in characters, of the text managed by this TextView
1274     */
1275    public int length() {
1276        return mText.length();
1277    }
1278
1279    /**
1280     * Return the text the TextView is displaying as an Editable object.  If
1281     * the text is not editable, null is returned.
1282     *
1283     * @see #getText
1284     */
1285    public Editable getEditableText() {
1286        return (mText instanceof Editable) ? (Editable)mText : null;
1287    }
1288
1289    /**
1290     * @return the height of one standard line in pixels.  Note that markup
1291     * within the text can cause individual lines to be taller or shorter
1292     * than this height, and the layout may contain additional first-
1293     * or last-line padding.
1294     */
1295    public int getLineHeight() {
1296        return FastMath.round(mTextPaint.getFontMetricsInt(null) * mSpacingMult + mSpacingAdd);
1297    }
1298
1299    /**
1300     * @return the Layout that is currently being used to display the text.
1301     * This can be null if the text or width has recently changes.
1302     */
1303    public final Layout getLayout() {
1304        return mLayout;
1305    }
1306
1307    /**
1308     * @return the current key listener for this TextView.
1309     * This will frequently be null for non-EditText TextViews.
1310     */
1311    public final KeyListener getKeyListener() {
1312        return mInput;
1313    }
1314
1315    /**
1316     * Sets the key listener to be used with this TextView.  This can be null
1317     * to disallow user input.  Note that this method has significant and
1318     * subtle interactions with soft keyboards and other input method:
1319     * see {@link KeyListener#getInputType() KeyListener.getContentType()}
1320     * for important details.  Calling this method will replace the current
1321     * content type of the text view with the content type returned by the
1322     * key listener.
1323     * <p>
1324     * Be warned that if you want a TextView with a key listener or movement
1325     * method not to be focusable, or if you want a TextView without a
1326     * key listener or movement method to be focusable, you must call
1327     * {@link #setFocusable} again after calling this to get the focusability
1328     * back the way you want it.
1329     *
1330     * @attr ref android.R.styleable#TextView_numeric
1331     * @attr ref android.R.styleable#TextView_digits
1332     * @attr ref android.R.styleable#TextView_phoneNumber
1333     * @attr ref android.R.styleable#TextView_inputMethod
1334     * @attr ref android.R.styleable#TextView_capitalize
1335     * @attr ref android.R.styleable#TextView_autoText
1336     */
1337    public void setKeyListener(KeyListener input) {
1338        setKeyListenerOnly(input);
1339        fixFocusableAndClickableSettings();
1340
1341        if (input != null) {
1342            try {
1343                mInputType = mInput.getInputType();
1344            } catch (IncompatibleClassChangeError e) {
1345                mInputType = EditorInfo.TYPE_CLASS_TEXT;
1346            }
1347            // Change inputType, without affecting transformation.
1348            // No need to applySingleLine since mSingleLine is unchanged.
1349            setInputTypeSingleLine(mSingleLine);
1350        } else {
1351            mInputType = EditorInfo.TYPE_NULL;
1352        }
1353
1354        InputMethodManager imm = InputMethodManager.peekInstance();
1355        if (imm != null) imm.restartInput(this);
1356    }
1357
1358    private void setKeyListenerOnly(KeyListener input) {
1359        mInput = input;
1360        if (mInput != null && !(mText instanceof Editable))
1361            setText(mText);
1362
1363        setFilters((Editable) mText, mFilters);
1364    }
1365
1366    /**
1367     * @return the movement method being used for this TextView.
1368     * This will frequently be null for non-EditText TextViews.
1369     */
1370    public final MovementMethod getMovementMethod() {
1371        return mMovement;
1372    }
1373
1374    /**
1375     * Sets the movement method (arrow key handler) to be used for
1376     * this TextView.  This can be null to disallow using the arrow keys
1377     * to move the cursor or scroll the view.
1378     * <p>
1379     * Be warned that if you want a TextView with a key listener or movement
1380     * method not to be focusable, or if you want a TextView without a
1381     * key listener or movement method to be focusable, you must call
1382     * {@link #setFocusable} again after calling this to get the focusability
1383     * back the way you want it.
1384     */
1385    public final void setMovementMethod(MovementMethod movement) {
1386        mMovement = movement;
1387
1388        if (mMovement != null && !(mText instanceof Spannable))
1389            setText(mText);
1390
1391        fixFocusableAndClickableSettings();
1392
1393        // SelectionModifierCursorController depends on textCanBeSelected, which depends on mMovement
1394        prepareCursorControllers();
1395    }
1396
1397    private void fixFocusableAndClickableSettings() {
1398        if ((mMovement != null) || mInput != null) {
1399            setFocusable(true);
1400            setClickable(true);
1401            setLongClickable(true);
1402        } else {
1403            setFocusable(false);
1404            setClickable(false);
1405            setLongClickable(false);
1406        }
1407    }
1408
1409    /**
1410     * @return the current transformation method for this TextView.
1411     * This will frequently be null except for single-line and password
1412     * fields.
1413     */
1414    public final TransformationMethod getTransformationMethod() {
1415        return mTransformation;
1416    }
1417
1418    /**
1419     * Sets the transformation that is applied to the text that this
1420     * TextView is displaying.
1421     *
1422     * @attr ref android.R.styleable#TextView_password
1423     * @attr ref android.R.styleable#TextView_singleLine
1424     */
1425    public final void setTransformationMethod(TransformationMethod method) {
1426        if (method == mTransformation) {
1427            // Avoid the setText() below if the transformation is
1428            // the same.
1429            return;
1430        }
1431        if (mTransformation != null) {
1432            if (mText instanceof Spannable) {
1433                ((Spannable) mText).removeSpan(mTransformation);
1434            }
1435        }
1436
1437        mTransformation = method;
1438
1439        if (method instanceof TransformationMethod2) {
1440            TransformationMethod2 method2 = (TransformationMethod2) method;
1441            mAllowTransformationLengthChange = !mTextIsSelectable && !(mText instanceof Editable);
1442            method2.setLengthChangesAllowed(mAllowTransformationLengthChange);
1443        } else {
1444            mAllowTransformationLengthChange = false;
1445        }
1446
1447        setText(mText);
1448    }
1449
1450    /**
1451     * Returns the top padding of the view, plus space for the top
1452     * Drawable if any.
1453     */
1454    public int getCompoundPaddingTop() {
1455        final Drawables dr = mDrawables;
1456        if (dr == null || dr.mDrawableTop == null) {
1457            return mPaddingTop;
1458        } else {
1459            return mPaddingTop + dr.mDrawablePadding + dr.mDrawableSizeTop;
1460        }
1461    }
1462
1463    /**
1464     * Returns the bottom padding of the view, plus space for the bottom
1465     * Drawable if any.
1466     */
1467    public int getCompoundPaddingBottom() {
1468        final Drawables dr = mDrawables;
1469        if (dr == null || dr.mDrawableBottom == null) {
1470            return mPaddingBottom;
1471        } else {
1472            return mPaddingBottom + dr.mDrawablePadding + dr.mDrawableSizeBottom;
1473        }
1474    }
1475
1476    /**
1477     * Returns the left padding of the view, plus space for the left
1478     * Drawable if any.
1479     */
1480    public int getCompoundPaddingLeft() {
1481        final Drawables dr = mDrawables;
1482        if (dr == null || dr.mDrawableLeft == null) {
1483            return mPaddingLeft;
1484        } else {
1485            return mPaddingLeft + dr.mDrawablePadding + dr.mDrawableSizeLeft;
1486        }
1487    }
1488
1489    /**
1490     * Returns the right padding of the view, plus space for the right
1491     * Drawable if any.
1492     */
1493    public int getCompoundPaddingRight() {
1494        final Drawables dr = mDrawables;
1495        if (dr == null || dr.mDrawableRight == null) {
1496            return mPaddingRight;
1497        } else {
1498            return mPaddingRight + dr.mDrawablePadding + dr.mDrawableSizeRight;
1499        }
1500    }
1501
1502    /**
1503     * Returns the start padding of the view, plus space for the start
1504     * Drawable if any.
1505     *
1506     * @hide
1507     */
1508    public int getCompoundPaddingStart() {
1509        resolveDrawables();
1510        switch(getResolvedLayoutDirection()) {
1511            default:
1512            case LAYOUT_DIRECTION_LTR:
1513                return getCompoundPaddingLeft();
1514            case LAYOUT_DIRECTION_RTL:
1515                return getCompoundPaddingRight();
1516        }
1517    }
1518
1519    /**
1520     * Returns the end padding of the view, plus space for the end
1521     * Drawable if any.
1522     *
1523     * @hide
1524     */
1525    public int getCompoundPaddingEnd() {
1526        resolveDrawables();
1527        switch(getResolvedLayoutDirection()) {
1528            default:
1529            case LAYOUT_DIRECTION_LTR:
1530                return getCompoundPaddingRight();
1531            case LAYOUT_DIRECTION_RTL:
1532                return getCompoundPaddingLeft();
1533        }
1534    }
1535
1536    /**
1537     * Returns the extended top padding of the view, including both the
1538     * top Drawable if any and any extra space to keep more than maxLines
1539     * of text from showing.  It is only valid to call this after measuring.
1540     */
1541    public int getExtendedPaddingTop() {
1542        if (mMaxMode != LINES) {
1543            return getCompoundPaddingTop();
1544        }
1545
1546        if (mLayout.getLineCount() <= mMaximum) {
1547            return getCompoundPaddingTop();
1548        }
1549
1550        int top = getCompoundPaddingTop();
1551        int bottom = getCompoundPaddingBottom();
1552        int viewht = getHeight() - top - bottom;
1553        int layoutht = mLayout.getLineTop(mMaximum);
1554
1555        if (layoutht >= viewht) {
1556            return top;
1557        }
1558
1559        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1560        if (gravity == Gravity.TOP) {
1561            return top;
1562        } else if (gravity == Gravity.BOTTOM) {
1563            return top + viewht - layoutht;
1564        } else { // (gravity == Gravity.CENTER_VERTICAL)
1565            return top + (viewht - layoutht) / 2;
1566        }
1567    }
1568
1569    /**
1570     * Returns the extended bottom padding of the view, including both the
1571     * bottom Drawable if any and any extra space to keep more than maxLines
1572     * of text from showing.  It is only valid to call this after measuring.
1573     */
1574    public int getExtendedPaddingBottom() {
1575        if (mMaxMode != LINES) {
1576            return getCompoundPaddingBottom();
1577        }
1578
1579        if (mLayout.getLineCount() <= mMaximum) {
1580            return getCompoundPaddingBottom();
1581        }
1582
1583        int top = getCompoundPaddingTop();
1584        int bottom = getCompoundPaddingBottom();
1585        int viewht = getHeight() - top - bottom;
1586        int layoutht = mLayout.getLineTop(mMaximum);
1587
1588        if (layoutht >= viewht) {
1589            return bottom;
1590        }
1591
1592        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1593        if (gravity == Gravity.TOP) {
1594            return bottom + viewht - layoutht;
1595        } else if (gravity == Gravity.BOTTOM) {
1596            return bottom;
1597        } else { // (gravity == Gravity.CENTER_VERTICAL)
1598            return bottom + (viewht - layoutht) / 2;
1599        }
1600    }
1601
1602    /**
1603     * Returns the total left padding of the view, including the left
1604     * Drawable if any.
1605     */
1606    public int getTotalPaddingLeft() {
1607        return getCompoundPaddingLeft();
1608    }
1609
1610    /**
1611     * Returns the total right padding of the view, including the right
1612     * Drawable if any.
1613     */
1614    public int getTotalPaddingRight() {
1615        return getCompoundPaddingRight();
1616    }
1617
1618    /**
1619     * Returns the total start padding of the view, including the start
1620     * Drawable if any.
1621     *
1622     * @hide
1623     */
1624    public int getTotalPaddingStart() {
1625        return getCompoundPaddingStart();
1626    }
1627
1628    /**
1629     * Returns the total end padding of the view, including the end
1630     * Drawable if any.
1631     *
1632     * @hide
1633     */
1634    public int getTotalPaddingEnd() {
1635        return getCompoundPaddingEnd();
1636    }
1637
1638    /**
1639     * Returns the total top padding of the view, including the top
1640     * Drawable if any, the extra space to keep more than maxLines
1641     * from showing, and the vertical offset for gravity, if any.
1642     */
1643    public int getTotalPaddingTop() {
1644        return getExtendedPaddingTop() + getVerticalOffset(true);
1645    }
1646
1647    /**
1648     * Returns the total bottom padding of the view, including the bottom
1649     * Drawable if any, the extra space to keep more than maxLines
1650     * from showing, and the vertical offset for gravity, if any.
1651     */
1652    public int getTotalPaddingBottom() {
1653        return getExtendedPaddingBottom() + getBottomVerticalOffset(true);
1654    }
1655
1656    /**
1657     * Sets the Drawables (if any) to appear to the left of, above,
1658     * to the right of, and below the text.  Use null if you do not
1659     * want a Drawable there.  The Drawables must already have had
1660     * {@link Drawable#setBounds} called.
1661     *
1662     * @attr ref android.R.styleable#TextView_drawableLeft
1663     * @attr ref android.R.styleable#TextView_drawableTop
1664     * @attr ref android.R.styleable#TextView_drawableRight
1665     * @attr ref android.R.styleable#TextView_drawableBottom
1666     */
1667    public void setCompoundDrawables(Drawable left, Drawable top,
1668                                     Drawable right, Drawable bottom) {
1669        Drawables dr = mDrawables;
1670
1671        final boolean drawables = left != null || top != null
1672                || right != null || bottom != null;
1673
1674        if (!drawables) {
1675            // Clearing drawables...  can we free the data structure?
1676            if (dr != null) {
1677                if (dr.mDrawablePadding == 0) {
1678                    mDrawables = null;
1679                } else {
1680                    // We need to retain the last set padding, so just clear
1681                    // out all of the fields in the existing structure.
1682                    if (dr.mDrawableLeft != null) dr.mDrawableLeft.setCallback(null);
1683                    dr.mDrawableLeft = null;
1684                    if (dr.mDrawableTop != null) dr.mDrawableTop.setCallback(null);
1685                    dr.mDrawableTop = null;
1686                    if (dr.mDrawableRight != null) dr.mDrawableRight.setCallback(null);
1687                    dr.mDrawableRight = null;
1688                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.setCallback(null);
1689                    dr.mDrawableBottom = null;
1690                    dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1691                    dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1692                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1693                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1694                }
1695            }
1696        } else {
1697            if (dr == null) {
1698                mDrawables = dr = new Drawables();
1699            }
1700
1701            if (dr.mDrawableLeft != left && dr.mDrawableLeft != null) {
1702                dr.mDrawableLeft.setCallback(null);
1703            }
1704            dr.mDrawableLeft = left;
1705
1706            if (dr.mDrawableTop != top && dr.mDrawableTop != null) {
1707                dr.mDrawableTop.setCallback(null);
1708            }
1709            dr.mDrawableTop = top;
1710
1711            if (dr.mDrawableRight != right && dr.mDrawableRight != null) {
1712                dr.mDrawableRight.setCallback(null);
1713            }
1714            dr.mDrawableRight = right;
1715
1716            if (dr.mDrawableBottom != bottom && dr.mDrawableBottom != null) {
1717                dr.mDrawableBottom.setCallback(null);
1718            }
1719            dr.mDrawableBottom = bottom;
1720
1721            final Rect compoundRect = dr.mCompoundRect;
1722            int[] state;
1723
1724            state = getDrawableState();
1725
1726            if (left != null) {
1727                left.setState(state);
1728                left.copyBounds(compoundRect);
1729                left.setCallback(this);
1730                dr.mDrawableSizeLeft = compoundRect.width();
1731                dr.mDrawableHeightLeft = compoundRect.height();
1732            } else {
1733                dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1734            }
1735
1736            if (right != null) {
1737                right.setState(state);
1738                right.copyBounds(compoundRect);
1739                right.setCallback(this);
1740                dr.mDrawableSizeRight = compoundRect.width();
1741                dr.mDrawableHeightRight = compoundRect.height();
1742            } else {
1743                dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1744            }
1745
1746            if (top != null) {
1747                top.setState(state);
1748                top.copyBounds(compoundRect);
1749                top.setCallback(this);
1750                dr.mDrawableSizeTop = compoundRect.height();
1751                dr.mDrawableWidthTop = compoundRect.width();
1752            } else {
1753                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1754            }
1755
1756            if (bottom != null) {
1757                bottom.setState(state);
1758                bottom.copyBounds(compoundRect);
1759                bottom.setCallback(this);
1760                dr.mDrawableSizeBottom = compoundRect.height();
1761                dr.mDrawableWidthBottom = compoundRect.width();
1762            } else {
1763                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1764            }
1765        }
1766
1767        invalidate();
1768        requestLayout();
1769    }
1770
1771    /**
1772     * Sets the Drawables (if any) to appear to the left of, above,
1773     * to the right of, and below the text.  Use 0 if you do not
1774     * want a Drawable there. The Drawables' bounds will be set to
1775     * their intrinsic bounds.
1776     *
1777     * @param left Resource identifier of the left Drawable.
1778     * @param top Resource identifier of the top Drawable.
1779     * @param right Resource identifier of the right Drawable.
1780     * @param bottom Resource identifier of the bottom Drawable.
1781     *
1782     * @attr ref android.R.styleable#TextView_drawableLeft
1783     * @attr ref android.R.styleable#TextView_drawableTop
1784     * @attr ref android.R.styleable#TextView_drawableRight
1785     * @attr ref android.R.styleable#TextView_drawableBottom
1786     */
1787    public void setCompoundDrawablesWithIntrinsicBounds(int left, int top, int right, int bottom) {
1788        final Resources resources = getContext().getResources();
1789        setCompoundDrawablesWithIntrinsicBounds(left != 0 ? resources.getDrawable(left) : null,
1790                top != 0 ? resources.getDrawable(top) : null,
1791                right != 0 ? resources.getDrawable(right) : null,
1792                bottom != 0 ? resources.getDrawable(bottom) : null);
1793    }
1794
1795    /**
1796     * Sets the Drawables (if any) to appear to the left of, above,
1797     * to the right of, and below the text.  Use null if you do not
1798     * want a Drawable there. The Drawables' bounds will be set to
1799     * their intrinsic bounds.
1800     *
1801     * @attr ref android.R.styleable#TextView_drawableLeft
1802     * @attr ref android.R.styleable#TextView_drawableTop
1803     * @attr ref android.R.styleable#TextView_drawableRight
1804     * @attr ref android.R.styleable#TextView_drawableBottom
1805     */
1806    public void setCompoundDrawablesWithIntrinsicBounds(Drawable left, Drawable top,
1807            Drawable right, Drawable bottom) {
1808
1809        if (left != null) {
1810            left.setBounds(0, 0, left.getIntrinsicWidth(), left.getIntrinsicHeight());
1811        }
1812        if (right != null) {
1813            right.setBounds(0, 0, right.getIntrinsicWidth(), right.getIntrinsicHeight());
1814        }
1815        if (top != null) {
1816            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
1817        }
1818        if (bottom != null) {
1819            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
1820        }
1821        setCompoundDrawables(left, top, right, bottom);
1822    }
1823
1824    /**
1825     * Sets the Drawables (if any) to appear to the start of, above,
1826     * to the end of, and below the text.  Use null if you do not
1827     * want a Drawable there.  The Drawables must already have had
1828     * {@link Drawable#setBounds} called.
1829     *
1830     * @attr ref android.R.styleable#TextView_drawableStart
1831     * @attr ref android.R.styleable#TextView_drawableTop
1832     * @attr ref android.R.styleable#TextView_drawableEnd
1833     * @attr ref android.R.styleable#TextView_drawableBottom
1834     *
1835     * @hide
1836     */
1837    public void setCompoundDrawablesRelative(Drawable start, Drawable top,
1838                                     Drawable end, Drawable bottom) {
1839        Drawables dr = mDrawables;
1840
1841        final boolean drawables = start != null || top != null
1842                || end != null || bottom != null;
1843
1844        if (!drawables) {
1845            // Clearing drawables...  can we free the data structure?
1846            if (dr != null) {
1847                if (dr.mDrawablePadding == 0) {
1848                    mDrawables = null;
1849                } else {
1850                    // We need to retain the last set padding, so just clear
1851                    // out all of the fields in the existing structure.
1852                    if (dr.mDrawableStart != null) dr.mDrawableStart.setCallback(null);
1853                    dr.mDrawableStart = null;
1854                    if (dr.mDrawableTop != null) dr.mDrawableTop.setCallback(null);
1855                    dr.mDrawableTop = null;
1856                    if (dr.mDrawableEnd != null) dr.mDrawableEnd.setCallback(null);
1857                    dr.mDrawableEnd = null;
1858                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.setCallback(null);
1859                    dr.mDrawableBottom = null;
1860                    dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1861                    dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1862                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1863                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1864                }
1865            }
1866        } else {
1867            if (dr == null) {
1868                mDrawables = dr = new Drawables();
1869            }
1870
1871            if (dr.mDrawableStart != start && dr.mDrawableStart != null) {
1872                dr.mDrawableStart.setCallback(null);
1873            }
1874            dr.mDrawableStart = start;
1875
1876            if (dr.mDrawableTop != top && dr.mDrawableTop != null) {
1877                dr.mDrawableTop.setCallback(null);
1878            }
1879            dr.mDrawableTop = top;
1880
1881            if (dr.mDrawableEnd != end && dr.mDrawableEnd != null) {
1882                dr.mDrawableEnd.setCallback(null);
1883            }
1884            dr.mDrawableEnd = end;
1885
1886            if (dr.mDrawableBottom != bottom && dr.mDrawableBottom != null) {
1887                dr.mDrawableBottom.setCallback(null);
1888            }
1889            dr.mDrawableBottom = bottom;
1890
1891            final Rect compoundRect = dr.mCompoundRect;
1892            int[] state;
1893
1894            state = getDrawableState();
1895
1896            if (start != null) {
1897                start.setState(state);
1898                start.copyBounds(compoundRect);
1899                start.setCallback(this);
1900                dr.mDrawableSizeStart = compoundRect.width();
1901                dr.mDrawableHeightStart = compoundRect.height();
1902            } else {
1903                dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1904            }
1905
1906            if (end != null) {
1907                end.setState(state);
1908                end.copyBounds(compoundRect);
1909                end.setCallback(this);
1910                dr.mDrawableSizeEnd = compoundRect.width();
1911                dr.mDrawableHeightEnd = compoundRect.height();
1912            } else {
1913                dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1914            }
1915
1916            if (top != null) {
1917                top.setState(state);
1918                top.copyBounds(compoundRect);
1919                top.setCallback(this);
1920                dr.mDrawableSizeTop = compoundRect.height();
1921                dr.mDrawableWidthTop = compoundRect.width();
1922            } else {
1923                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1924            }
1925
1926            if (bottom != null) {
1927                bottom.setState(state);
1928                bottom.copyBounds(compoundRect);
1929                bottom.setCallback(this);
1930                dr.mDrawableSizeBottom = compoundRect.height();
1931                dr.mDrawableWidthBottom = compoundRect.width();
1932            } else {
1933                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1934            }
1935        }
1936
1937        resolveDrawables();
1938        invalidate();
1939        requestLayout();
1940    }
1941
1942    /**
1943     * Sets the Drawables (if any) to appear to the start of, above,
1944     * to the end of, and below the text.  Use 0 if you do not
1945     * want a Drawable there. The Drawables' bounds will be set to
1946     * their intrinsic bounds.
1947     *
1948     * @param start Resource identifier of the start Drawable.
1949     * @param top Resource identifier of the top Drawable.
1950     * @param end Resource identifier of the end Drawable.
1951     * @param bottom Resource identifier of the bottom Drawable.
1952     *
1953     * @attr ref android.R.styleable#TextView_drawableStart
1954     * @attr ref android.R.styleable#TextView_drawableTop
1955     * @attr ref android.R.styleable#TextView_drawableEnd
1956     * @attr ref android.R.styleable#TextView_drawableBottom
1957     *
1958     * @hide
1959     */
1960    public void setCompoundDrawablesRelativeWithIntrinsicBounds(int start, int top, int end,
1961            int bottom) {
1962        resetResolvedDrawables();
1963        final Resources resources = getContext().getResources();
1964        setCompoundDrawablesRelativeWithIntrinsicBounds(
1965                start != 0 ? resources.getDrawable(start) : null,
1966                top != 0 ? resources.getDrawable(top) : null,
1967                end != 0 ? resources.getDrawable(end) : null,
1968                bottom != 0 ? resources.getDrawable(bottom) : null);
1969    }
1970
1971    /**
1972     * Sets the Drawables (if any) to appear to the start of, above,
1973     * to the end of, and below the text.  Use null if you do not
1974     * want a Drawable there. The Drawables' bounds will be set to
1975     * their intrinsic bounds.
1976     *
1977     * @attr ref android.R.styleable#TextView_drawableStart
1978     * @attr ref android.R.styleable#TextView_drawableTop
1979     * @attr ref android.R.styleable#TextView_drawableEnd
1980     * @attr ref android.R.styleable#TextView_drawableBottom
1981     *
1982     * @hide
1983     */
1984    public void setCompoundDrawablesRelativeWithIntrinsicBounds(Drawable start, Drawable top,
1985            Drawable end, Drawable bottom) {
1986
1987        resetResolvedDrawables();
1988        if (start != null) {
1989            start.setBounds(0, 0, start.getIntrinsicWidth(), start.getIntrinsicHeight());
1990        }
1991        if (end != null) {
1992            end.setBounds(0, 0, end.getIntrinsicWidth(), end.getIntrinsicHeight());
1993        }
1994        if (top != null) {
1995            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
1996        }
1997        if (bottom != null) {
1998            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
1999        }
2000        setCompoundDrawablesRelative(start, top, end, bottom);
2001    }
2002
2003    /**
2004     * Returns drawables for the left, top, right, and bottom borders.
2005     */
2006    public Drawable[] getCompoundDrawables() {
2007        final Drawables dr = mDrawables;
2008        if (dr != null) {
2009            return new Drawable[] {
2010                dr.mDrawableLeft, dr.mDrawableTop, dr.mDrawableRight, dr.mDrawableBottom
2011            };
2012        } else {
2013            return new Drawable[] { null, null, null, null };
2014        }
2015    }
2016
2017    /**
2018     * Returns drawables for the start, top, end, and bottom borders.
2019     *
2020     * @hide
2021     */
2022    public Drawable[] getCompoundDrawablesRelative() {
2023        final Drawables dr = mDrawables;
2024        if (dr != null) {
2025            return new Drawable[] {
2026                dr.mDrawableStart, dr.mDrawableTop, dr.mDrawableEnd, dr.mDrawableBottom
2027            };
2028        } else {
2029            return new Drawable[] { null, null, null, null };
2030        }
2031    }
2032
2033    /**
2034     * Sets the size of the padding between the compound drawables and
2035     * the text.
2036     *
2037     * @attr ref android.R.styleable#TextView_drawablePadding
2038     */
2039    public void setCompoundDrawablePadding(int pad) {
2040        Drawables dr = mDrawables;
2041        if (pad == 0) {
2042            if (dr != null) {
2043                dr.mDrawablePadding = pad;
2044            }
2045        } else {
2046            if (dr == null) {
2047                mDrawables = dr = new Drawables();
2048            }
2049            dr.mDrawablePadding = pad;
2050        }
2051
2052        invalidate();
2053        requestLayout();
2054    }
2055
2056    /**
2057     * Returns the padding between the compound drawables and the text.
2058     */
2059    public int getCompoundDrawablePadding() {
2060        final Drawables dr = mDrawables;
2061        return dr != null ? dr.mDrawablePadding : 0;
2062    }
2063
2064    @Override
2065    public void setPadding(int left, int top, int right, int bottom) {
2066        if (left != mPaddingLeft ||
2067            right != mPaddingRight ||
2068            top != mPaddingTop ||
2069            bottom != mPaddingBottom) {
2070            nullLayouts();
2071        }
2072
2073        // the super call will requestLayout()
2074        super.setPadding(left, top, right, bottom);
2075        invalidate();
2076    }
2077
2078    /**
2079     * Gets the autolink mask of the text.  See {@link
2080     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
2081     * possible values.
2082     *
2083     * @attr ref android.R.styleable#TextView_autoLink
2084     */
2085    public final int getAutoLinkMask() {
2086        return mAutoLinkMask;
2087    }
2088
2089    /**
2090     * Sets the text color, size, style, hint color, and highlight color
2091     * from the specified TextAppearance resource.
2092     */
2093    public void setTextAppearance(Context context, int resid) {
2094        TypedArray appearance =
2095            context.obtainStyledAttributes(resid,
2096                                           com.android.internal.R.styleable.TextAppearance);
2097
2098        int color;
2099        ColorStateList colors;
2100        int ts;
2101
2102        color = appearance.getColor(com.android.internal.R.styleable.TextAppearance_textColorHighlight, 0);
2103        if (color != 0) {
2104            setHighlightColor(color);
2105        }
2106
2107        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2108                                              TextAppearance_textColor);
2109        if (colors != null) {
2110            setTextColor(colors);
2111        }
2112
2113        ts = appearance.getDimensionPixelSize(com.android.internal.R.styleable.
2114                                              TextAppearance_textSize, 0);
2115        if (ts != 0) {
2116            setRawTextSize(ts);
2117        }
2118
2119        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2120                                              TextAppearance_textColorHint);
2121        if (colors != null) {
2122            setHintTextColor(colors);
2123        }
2124
2125        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2126                                              TextAppearance_textColorLink);
2127        if (colors != null) {
2128            setLinkTextColor(colors);
2129        }
2130
2131        int typefaceIndex, styleIndex;
2132
2133        typefaceIndex = appearance.getInt(com.android.internal.R.styleable.
2134                                          TextAppearance_typeface, -1);
2135        styleIndex = appearance.getInt(com.android.internal.R.styleable.
2136                                       TextAppearance_textStyle, -1);
2137
2138        setTypefaceByIndex(typefaceIndex, styleIndex);
2139
2140        if (appearance.getBoolean(com.android.internal.R.styleable.TextAppearance_textAllCaps,
2141                false)) {
2142            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
2143        }
2144
2145        appearance.recycle();
2146    }
2147
2148    /**
2149     * @return the size (in pixels) of the default text size in this TextView.
2150     */
2151    public float getTextSize() {
2152        return mTextPaint.getTextSize();
2153    }
2154
2155    /**
2156     * Set the default text size to the given value, interpreted as "scaled
2157     * pixel" units.  This size is adjusted based on the current density and
2158     * user font size preference.
2159     *
2160     * @param size The scaled pixel size.
2161     *
2162     * @attr ref android.R.styleable#TextView_textSize
2163     */
2164    @android.view.RemotableViewMethod
2165    public void setTextSize(float size) {
2166        setTextSize(TypedValue.COMPLEX_UNIT_SP, size);
2167    }
2168
2169    /**
2170     * Set the default text size to a given unit and value.  See {@link
2171     * TypedValue} for the possible dimension units.
2172     *
2173     * @param unit The desired dimension unit.
2174     * @param size The desired size in the given units.
2175     *
2176     * @attr ref android.R.styleable#TextView_textSize
2177     */
2178    public void setTextSize(int unit, float size) {
2179        Context c = getContext();
2180        Resources r;
2181
2182        if (c == null)
2183            r = Resources.getSystem();
2184        else
2185            r = c.getResources();
2186
2187        setRawTextSize(TypedValue.applyDimension(
2188            unit, size, r.getDisplayMetrics()));
2189    }
2190
2191    private void setRawTextSize(float size) {
2192        if (size != mTextPaint.getTextSize()) {
2193            mTextPaint.setTextSize(size);
2194
2195            if (mLayout != null) {
2196                nullLayouts();
2197                requestLayout();
2198                invalidate();
2199            }
2200        }
2201    }
2202
2203    /**
2204     * @return the extent by which text is currently being stretched
2205     * horizontally.  This will usually be 1.
2206     */
2207    public float getTextScaleX() {
2208        return mTextPaint.getTextScaleX();
2209    }
2210
2211    /**
2212     * Sets the extent by which text should be stretched horizontally.
2213     *
2214     * @attr ref android.R.styleable#TextView_textScaleX
2215     */
2216    @android.view.RemotableViewMethod
2217    public void setTextScaleX(float size) {
2218        if (size != mTextPaint.getTextScaleX()) {
2219            mUserSetTextScaleX = true;
2220            mTextPaint.setTextScaleX(size);
2221
2222            if (mLayout != null) {
2223                nullLayouts();
2224                requestLayout();
2225                invalidate();
2226            }
2227        }
2228    }
2229
2230    /**
2231     * Sets the typeface and style in which the text should be displayed.
2232     * Note that not all Typeface families actually have bold and italic
2233     * variants, so you may need to use
2234     * {@link #setTypeface(Typeface, int)} to get the appearance
2235     * that you actually want.
2236     *
2237     * @attr ref android.R.styleable#TextView_typeface
2238     * @attr ref android.R.styleable#TextView_textStyle
2239     */
2240    public void setTypeface(Typeface tf) {
2241        if (mTextPaint.getTypeface() != tf) {
2242            mTextPaint.setTypeface(tf);
2243
2244            if (mLayout != null) {
2245                nullLayouts();
2246                requestLayout();
2247                invalidate();
2248            }
2249        }
2250    }
2251
2252    /**
2253     * @return the current typeface and style in which the text is being
2254     * displayed.
2255     */
2256    public Typeface getTypeface() {
2257        return mTextPaint.getTypeface();
2258    }
2259
2260    /**
2261     * Sets the text color for all the states (normal, selected,
2262     * focused) to be this color.
2263     *
2264     * @attr ref android.R.styleable#TextView_textColor
2265     */
2266    @android.view.RemotableViewMethod
2267    public void setTextColor(int color) {
2268        mTextColor = ColorStateList.valueOf(color);
2269        updateTextColors();
2270    }
2271
2272    /**
2273     * Sets the text color.
2274     *
2275     * @attr ref android.R.styleable#TextView_textColor
2276     */
2277    public void setTextColor(ColorStateList colors) {
2278        if (colors == null) {
2279            throw new NullPointerException();
2280        }
2281
2282        mTextColor = colors;
2283        updateTextColors();
2284    }
2285
2286    /**
2287     * Return the set of text colors.
2288     *
2289     * @return Returns the set of text colors.
2290     */
2291    public final ColorStateList getTextColors() {
2292        return mTextColor;
2293    }
2294
2295    /**
2296     * <p>Return the current color selected for normal text.</p>
2297     *
2298     * @return Returns the current text color.
2299     */
2300    public final int getCurrentTextColor() {
2301        return mCurTextColor;
2302    }
2303
2304    /**
2305     * Sets the color used to display the selection highlight.
2306     *
2307     * @attr ref android.R.styleable#TextView_textColorHighlight
2308     */
2309    @android.view.RemotableViewMethod
2310    public void setHighlightColor(int color) {
2311        if (mHighlightColor != color) {
2312            mHighlightColor = color;
2313            invalidate();
2314        }
2315    }
2316
2317    /**
2318     * Gives the text a shadow of the specified radius and color, the specified
2319     * distance from its normal position.
2320     *
2321     * @attr ref android.R.styleable#TextView_shadowColor
2322     * @attr ref android.R.styleable#TextView_shadowDx
2323     * @attr ref android.R.styleable#TextView_shadowDy
2324     * @attr ref android.R.styleable#TextView_shadowRadius
2325     */
2326    public void setShadowLayer(float radius, float dx, float dy, int color) {
2327        mTextPaint.setShadowLayer(radius, dx, dy, color);
2328
2329        mShadowRadius = radius;
2330        mShadowDx = dx;
2331        mShadowDy = dy;
2332
2333        invalidate();
2334    }
2335
2336    /**
2337     * @return the base paint used for the text.  Please use this only to
2338     * consult the Paint's properties and not to change them.
2339     */
2340    public TextPaint getPaint() {
2341        return mTextPaint;
2342    }
2343
2344    /**
2345     * Sets the autolink mask of the text.  See {@link
2346     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
2347     * possible values.
2348     *
2349     * @attr ref android.R.styleable#TextView_autoLink
2350     */
2351    @android.view.RemotableViewMethod
2352    public final void setAutoLinkMask(int mask) {
2353        mAutoLinkMask = mask;
2354    }
2355
2356    /**
2357     * Sets whether the movement method will automatically be set to
2358     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
2359     * set to nonzero and links are detected in {@link #setText}.
2360     * The default is true.
2361     *
2362     * @attr ref android.R.styleable#TextView_linksClickable
2363     */
2364    @android.view.RemotableViewMethod
2365    public final void setLinksClickable(boolean whether) {
2366        mLinksClickable = whether;
2367    }
2368
2369    /**
2370     * Returns whether the movement method will automatically be set to
2371     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
2372     * set to nonzero and links are detected in {@link #setText}.
2373     * The default is true.
2374     *
2375     * @attr ref android.R.styleable#TextView_linksClickable
2376     */
2377    public final boolean getLinksClickable() {
2378        return mLinksClickable;
2379    }
2380
2381    /**
2382     * Sets whether the soft input method will be made visible when this
2383     * TextView gets focused. The default is true.
2384     *
2385     * @attr ref android.R.styleable#TextView_softInputShownOnFocus
2386     * @hide
2387     */
2388    @android.view.RemotableViewMethod
2389    public final void setSoftInputShownOnFocus(boolean show) {
2390        mSoftInputShownOnFocus = show;
2391    }
2392
2393    /**
2394     * Returns whether the soft input method will be made visible when this
2395     * TextView gets focused. The default is true.
2396     *
2397     * @attr ref android.R.styleable#TextView_softInputShownOnFocus
2398     * @hide
2399     */
2400    public final boolean getSoftInputShownOnFocus() {
2401        return mSoftInputShownOnFocus;
2402    }
2403
2404    /**
2405     * Returns the list of URLSpans attached to the text
2406     * (by {@link Linkify} or otherwise) if any.  You can call
2407     * {@link URLSpan#getURL} on them to find where they link to
2408     * or use {@link Spanned#getSpanStart} and {@link Spanned#getSpanEnd}
2409     * to find the region of the text they are attached to.
2410     */
2411    public URLSpan[] getUrls() {
2412        if (mText instanceof Spanned) {
2413            return ((Spanned) mText).getSpans(0, mText.length(), URLSpan.class);
2414        } else {
2415            return new URLSpan[0];
2416        }
2417    }
2418
2419    /**
2420     * Sets the color of the hint text.
2421     *
2422     * @attr ref android.R.styleable#TextView_textColorHint
2423     */
2424    @android.view.RemotableViewMethod
2425    public final void setHintTextColor(int color) {
2426        mHintTextColor = ColorStateList.valueOf(color);
2427        updateTextColors();
2428    }
2429
2430    /**
2431     * Sets the color of the hint text.
2432     *
2433     * @attr ref android.R.styleable#TextView_textColorHint
2434     */
2435    public final void setHintTextColor(ColorStateList colors) {
2436        mHintTextColor = colors;
2437        updateTextColors();
2438    }
2439
2440    /**
2441     * <p>Return the color used to paint the hint text.</p>
2442     *
2443     * @return Returns the list of hint text colors.
2444     */
2445    public final ColorStateList getHintTextColors() {
2446        return mHintTextColor;
2447    }
2448
2449    /**
2450     * <p>Return the current color selected to paint the hint text.</p>
2451     *
2452     * @return Returns the current hint text color.
2453     */
2454    public final int getCurrentHintTextColor() {
2455        return mHintTextColor != null ? mCurHintTextColor : mCurTextColor;
2456    }
2457
2458    /**
2459     * Sets the color of links in the text.
2460     *
2461     * @attr ref android.R.styleable#TextView_textColorLink
2462     */
2463    @android.view.RemotableViewMethod
2464    public final void setLinkTextColor(int color) {
2465        mLinkTextColor = ColorStateList.valueOf(color);
2466        updateTextColors();
2467    }
2468
2469    /**
2470     * Sets the color of links in the text.
2471     *
2472     * @attr ref android.R.styleable#TextView_textColorLink
2473     */
2474    public final void setLinkTextColor(ColorStateList colors) {
2475        mLinkTextColor = colors;
2476        updateTextColors();
2477    }
2478
2479    /**
2480     * <p>Returns the color used to paint links in the text.</p>
2481     *
2482     * @return Returns the list of link text colors.
2483     */
2484    public final ColorStateList getLinkTextColors() {
2485        return mLinkTextColor;
2486    }
2487
2488    /**
2489     * Sets the horizontal alignment of the text and the
2490     * vertical gravity that will be used when there is extra space
2491     * in the TextView beyond what is required for the text itself.
2492     *
2493     * @see android.view.Gravity
2494     * @attr ref android.R.styleable#TextView_gravity
2495     */
2496    public void setGravity(int gravity) {
2497        if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) == 0) {
2498            gravity |= Gravity.START;
2499        }
2500        if ((gravity & Gravity.VERTICAL_GRAVITY_MASK) == 0) {
2501            gravity |= Gravity.TOP;
2502        }
2503
2504        boolean newLayout = false;
2505
2506        if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) !=
2507            (mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK)) {
2508            newLayout = true;
2509        }
2510
2511        if (gravity != mGravity) {
2512            invalidate();
2513            mLayoutAlignment = null;
2514        }
2515
2516        mGravity = gravity;
2517
2518        if (mLayout != null && newLayout) {
2519            // XXX this is heavy-handed because no actual content changes.
2520            int want = mLayout.getWidth();
2521            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
2522
2523            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
2524                          mRight - mLeft - getCompoundPaddingLeft() -
2525                          getCompoundPaddingRight(), true);
2526        }
2527    }
2528
2529    /**
2530     * Returns the horizontal and vertical alignment of this TextView.
2531     *
2532     * @see android.view.Gravity
2533     * @attr ref android.R.styleable#TextView_gravity
2534     */
2535    public int getGravity() {
2536        return mGravity;
2537    }
2538
2539    /**
2540     * @return the flags on the Paint being used to display the text.
2541     * @see Paint#getFlags
2542     */
2543    public int getPaintFlags() {
2544        return mTextPaint.getFlags();
2545    }
2546
2547    /**
2548     * Sets flags on the Paint being used to display the text and
2549     * reflows the text if they are different from the old flags.
2550     * @see Paint#setFlags
2551     */
2552    @android.view.RemotableViewMethod
2553    public void setPaintFlags(int flags) {
2554        if (mTextPaint.getFlags() != flags) {
2555            mTextPaint.setFlags(flags);
2556
2557            if (mLayout != null) {
2558                nullLayouts();
2559                requestLayout();
2560                invalidate();
2561            }
2562        }
2563    }
2564
2565    /**
2566     * Sets whether the text should be allowed to be wider than the
2567     * View is.  If false, it will be wrapped to the width of the View.
2568     *
2569     * @attr ref android.R.styleable#TextView_scrollHorizontally
2570     */
2571    public void setHorizontallyScrolling(boolean whether) {
2572        if (mHorizontallyScrolling != whether) {
2573            mHorizontallyScrolling = whether;
2574
2575            if (mLayout != null) {
2576                nullLayouts();
2577                requestLayout();
2578                invalidate();
2579            }
2580        }
2581    }
2582
2583    /**
2584     * Makes the TextView at least this many lines tall.
2585     *
2586     * Setting this value overrides any other (minimum) height setting. A single line TextView will
2587     * set this value to 1.
2588     *
2589     * @attr ref android.R.styleable#TextView_minLines
2590     */
2591    @android.view.RemotableViewMethod
2592    public void setMinLines(int minlines) {
2593        mMinimum = minlines;
2594        mMinMode = LINES;
2595
2596        requestLayout();
2597        invalidate();
2598    }
2599
2600    /**
2601     * Makes the TextView at least this many pixels tall.
2602     *
2603     * Setting this value overrides any other (minimum) number of lines setting.
2604     *
2605     * @attr ref android.R.styleable#TextView_minHeight
2606     */
2607    @android.view.RemotableViewMethod
2608    public void setMinHeight(int minHeight) {
2609        mMinimum = minHeight;
2610        mMinMode = PIXELS;
2611
2612        requestLayout();
2613        invalidate();
2614    }
2615
2616    /**
2617     * Makes the TextView at most this many lines tall.
2618     *
2619     * Setting this value overrides any other (maximum) height setting.
2620     *
2621     * @attr ref android.R.styleable#TextView_maxLines
2622     */
2623    @android.view.RemotableViewMethod
2624    public void setMaxLines(int maxlines) {
2625        mMaximum = maxlines;
2626        mMaxMode = LINES;
2627
2628        requestLayout();
2629        invalidate();
2630    }
2631
2632    /**
2633     * Makes the TextView at most this many pixels tall.  This option is mutually exclusive with the
2634     * {@link #setMaxLines(int)} method.
2635     *
2636     * Setting this value overrides any other (maximum) number of lines setting.
2637     *
2638     * @attr ref android.R.styleable#TextView_maxHeight
2639     */
2640    @android.view.RemotableViewMethod
2641    public void setMaxHeight(int maxHeight) {
2642        mMaximum = maxHeight;
2643        mMaxMode = PIXELS;
2644
2645        requestLayout();
2646        invalidate();
2647    }
2648
2649    /**
2650     * Makes the TextView exactly this many lines tall.
2651     *
2652     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2653     * height setting. A single line TextView will set this value to 1.
2654     *
2655     * @attr ref android.R.styleable#TextView_lines
2656     */
2657    @android.view.RemotableViewMethod
2658    public void setLines(int lines) {
2659        mMaximum = mMinimum = lines;
2660        mMaxMode = mMinMode = LINES;
2661
2662        requestLayout();
2663        invalidate();
2664    }
2665
2666    /**
2667     * Makes the TextView exactly this many pixels tall.
2668     * You could do the same thing by specifying this number in the
2669     * LayoutParams.
2670     *
2671     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2672     * height setting.
2673     *
2674     * @attr ref android.R.styleable#TextView_height
2675     */
2676    @android.view.RemotableViewMethod
2677    public void setHeight(int pixels) {
2678        mMaximum = mMinimum = pixels;
2679        mMaxMode = mMinMode = PIXELS;
2680
2681        requestLayout();
2682        invalidate();
2683    }
2684
2685    /**
2686     * Makes the TextView at least this many ems wide
2687     *
2688     * @attr ref android.R.styleable#TextView_minEms
2689     */
2690    @android.view.RemotableViewMethod
2691    public void setMinEms(int minems) {
2692        mMinWidth = minems;
2693        mMinWidthMode = EMS;
2694
2695        requestLayout();
2696        invalidate();
2697    }
2698
2699    /**
2700     * Makes the TextView at least this many pixels wide
2701     *
2702     * @attr ref android.R.styleable#TextView_minWidth
2703     */
2704    @android.view.RemotableViewMethod
2705    public void setMinWidth(int minpixels) {
2706        mMinWidth = minpixels;
2707        mMinWidthMode = PIXELS;
2708
2709        requestLayout();
2710        invalidate();
2711    }
2712
2713    /**
2714     * Makes the TextView at most this many ems wide
2715     *
2716     * @attr ref android.R.styleable#TextView_maxEms
2717     */
2718    @android.view.RemotableViewMethod
2719    public void setMaxEms(int maxems) {
2720        mMaxWidth = maxems;
2721        mMaxWidthMode = EMS;
2722
2723        requestLayout();
2724        invalidate();
2725    }
2726
2727    /**
2728     * Makes the TextView at most this many pixels wide
2729     *
2730     * @attr ref android.R.styleable#TextView_maxWidth
2731     */
2732    @android.view.RemotableViewMethod
2733    public void setMaxWidth(int maxpixels) {
2734        mMaxWidth = maxpixels;
2735        mMaxWidthMode = PIXELS;
2736
2737        requestLayout();
2738        invalidate();
2739    }
2740
2741    /**
2742     * Makes the TextView exactly this many ems wide
2743     *
2744     * @attr ref android.R.styleable#TextView_ems
2745     */
2746    @android.view.RemotableViewMethod
2747    public void setEms(int ems) {
2748        mMaxWidth = mMinWidth = ems;
2749        mMaxWidthMode = mMinWidthMode = EMS;
2750
2751        requestLayout();
2752        invalidate();
2753    }
2754
2755    /**
2756     * Makes the TextView exactly this many pixels wide.
2757     * You could do the same thing by specifying this number in the
2758     * LayoutParams.
2759     *
2760     * @attr ref android.R.styleable#TextView_width
2761     */
2762    @android.view.RemotableViewMethod
2763    public void setWidth(int pixels) {
2764        mMaxWidth = mMinWidth = pixels;
2765        mMaxWidthMode = mMinWidthMode = PIXELS;
2766
2767        requestLayout();
2768        invalidate();
2769    }
2770
2771
2772    /**
2773     * Sets line spacing for this TextView.  Each line will have its height
2774     * multiplied by <code>mult</code> and have <code>add</code> added to it.
2775     *
2776     * @attr ref android.R.styleable#TextView_lineSpacingExtra
2777     * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
2778     */
2779    public void setLineSpacing(float add, float mult) {
2780        if (mSpacingAdd != add || mSpacingMult != mult) {
2781            mSpacingAdd = add;
2782            mSpacingMult = mult;
2783
2784            if (mLayout != null) {
2785                nullLayouts();
2786                requestLayout();
2787                invalidate();
2788            }
2789        }
2790    }
2791
2792    /**
2793     * Convenience method: Append the specified text to the TextView's
2794     * display buffer, upgrading it to BufferType.EDITABLE if it was
2795     * not already editable.
2796     */
2797    public final void append(CharSequence text) {
2798        append(text, 0, text.length());
2799    }
2800
2801    /**
2802     * Convenience method: Append the specified text slice to the TextView's
2803     * display buffer, upgrading it to BufferType.EDITABLE if it was
2804     * not already editable.
2805     */
2806    public void append(CharSequence text, int start, int end) {
2807        if (!(mText instanceof Editable)) {
2808            setText(mText, BufferType.EDITABLE);
2809        }
2810
2811        ((Editable) mText).append(text, start, end);
2812    }
2813
2814    private void updateTextColors() {
2815        boolean inval = false;
2816        int color = mTextColor.getColorForState(getDrawableState(), 0);
2817        if (color != mCurTextColor) {
2818            mCurTextColor = color;
2819            inval = true;
2820        }
2821        if (mLinkTextColor != null) {
2822            color = mLinkTextColor.getColorForState(getDrawableState(), 0);
2823            if (color != mTextPaint.linkColor) {
2824                mTextPaint.linkColor = color;
2825                inval = true;
2826            }
2827        }
2828        if (mHintTextColor != null) {
2829            color = mHintTextColor.getColorForState(getDrawableState(), 0);
2830            if (color != mCurHintTextColor && mText.length() == 0) {
2831                mCurHintTextColor = color;
2832                inval = true;
2833            }
2834        }
2835        if (inval) {
2836            invalidate();
2837        }
2838    }
2839
2840    @Override
2841    protected void drawableStateChanged() {
2842        super.drawableStateChanged();
2843        if (mTextColor != null && mTextColor.isStateful()
2844                || (mHintTextColor != null && mHintTextColor.isStateful())
2845                || (mLinkTextColor != null && mLinkTextColor.isStateful())) {
2846            updateTextColors();
2847        }
2848
2849        final Drawables dr = mDrawables;
2850        if (dr != null) {
2851            int[] state = getDrawableState();
2852            if (dr.mDrawableTop != null && dr.mDrawableTop.isStateful()) {
2853                dr.mDrawableTop.setState(state);
2854            }
2855            if (dr.mDrawableBottom != null && dr.mDrawableBottom.isStateful()) {
2856                dr.mDrawableBottom.setState(state);
2857            }
2858            if (dr.mDrawableLeft != null && dr.mDrawableLeft.isStateful()) {
2859                dr.mDrawableLeft.setState(state);
2860            }
2861            if (dr.mDrawableRight != null && dr.mDrawableRight.isStateful()) {
2862                dr.mDrawableRight.setState(state);
2863            }
2864            if (dr.mDrawableStart != null && dr.mDrawableStart.isStateful()) {
2865                dr.mDrawableStart.setState(state);
2866            }
2867            if (dr.mDrawableEnd != null && dr.mDrawableEnd.isStateful()) {
2868                dr.mDrawableEnd.setState(state);
2869            }
2870        }
2871    }
2872
2873    /**
2874     * User interface state that is stored by TextView for implementing
2875     * {@link View#onSaveInstanceState}.
2876     */
2877    public static class SavedState extends BaseSavedState {
2878        int selStart;
2879        int selEnd;
2880        CharSequence text;
2881        boolean frozenWithFocus;
2882        CharSequence error;
2883
2884        SavedState(Parcelable superState) {
2885            super(superState);
2886        }
2887
2888        @Override
2889        public void writeToParcel(Parcel out, int flags) {
2890            super.writeToParcel(out, flags);
2891            out.writeInt(selStart);
2892            out.writeInt(selEnd);
2893            out.writeInt(frozenWithFocus ? 1 : 0);
2894            TextUtils.writeToParcel(text, out, flags);
2895
2896            if (error == null) {
2897                out.writeInt(0);
2898            } else {
2899                out.writeInt(1);
2900                TextUtils.writeToParcel(error, out, flags);
2901            }
2902        }
2903
2904        @Override
2905        public String toString() {
2906            String str = "TextView.SavedState{"
2907                    + Integer.toHexString(System.identityHashCode(this))
2908                    + " start=" + selStart + " end=" + selEnd;
2909            if (text != null) {
2910                str += " text=" + text;
2911            }
2912            return str + "}";
2913        }
2914
2915        @SuppressWarnings("hiding")
2916        public static final Parcelable.Creator<SavedState> CREATOR
2917                = new Parcelable.Creator<SavedState>() {
2918            public SavedState createFromParcel(Parcel in) {
2919                return new SavedState(in);
2920            }
2921
2922            public SavedState[] newArray(int size) {
2923                return new SavedState[size];
2924            }
2925        };
2926
2927        private SavedState(Parcel in) {
2928            super(in);
2929            selStart = in.readInt();
2930            selEnd = in.readInt();
2931            frozenWithFocus = (in.readInt() != 0);
2932            text = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2933
2934            if (in.readInt() != 0) {
2935                error = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2936            }
2937        }
2938    }
2939
2940    @Override
2941    public Parcelable onSaveInstanceState() {
2942        Parcelable superState = super.onSaveInstanceState();
2943
2944        // Save state if we are forced to
2945        boolean save = mFreezesText;
2946        int start = 0;
2947        int end = 0;
2948
2949        if (mText != null) {
2950            start = getSelectionStart();
2951            end = getSelectionEnd();
2952            if (start >= 0 || end >= 0) {
2953                // Or save state if there is a selection
2954                save = true;
2955            }
2956        }
2957
2958        if (save) {
2959            SavedState ss = new SavedState(superState);
2960            // XXX Should also save the current scroll position!
2961            ss.selStart = start;
2962            ss.selEnd = end;
2963
2964            if (mText instanceof Spanned) {
2965                /*
2966                 * Calling setText() strips off any ChangeWatchers;
2967                 * strip them now to avoid leaking references.
2968                 * But do it to a copy so that if there are any
2969                 * further changes to the text of this view, it
2970                 * won't get into an inconsistent state.
2971                 */
2972
2973                Spannable sp = new SpannableString(mText);
2974
2975                for (ChangeWatcher cw : sp.getSpans(0, sp.length(), ChangeWatcher.class)) {
2976                    sp.removeSpan(cw);
2977                }
2978
2979                removeMisspelledSpans(sp);
2980                sp.removeSpan(mSuggestionRangeSpan);
2981
2982                ss.text = sp;
2983            } else {
2984                ss.text = mText.toString();
2985            }
2986
2987            if (isFocused() && start >= 0 && end >= 0) {
2988                ss.frozenWithFocus = true;
2989            }
2990
2991            ss.error = mError;
2992
2993            return ss;
2994        }
2995
2996        return superState;
2997    }
2998
2999    void removeMisspelledSpans(Spannable spannable) {
3000        SuggestionSpan[] suggestionSpans = spannable.getSpans(0, spannable.length(),
3001                SuggestionSpan.class);
3002        for (int i = 0; i < suggestionSpans.length; i++) {
3003            int flags = suggestionSpans[i].getFlags();
3004            if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0
3005                    && (flags & SuggestionSpan.FLAG_MISSPELLED) != 0) {
3006                spannable.removeSpan(suggestionSpans[i]);
3007            }
3008        }
3009    }
3010
3011    @Override
3012    public void onRestoreInstanceState(Parcelable state) {
3013        if (!(state instanceof SavedState)) {
3014            super.onRestoreInstanceState(state);
3015            return;
3016        }
3017
3018        SavedState ss = (SavedState)state;
3019        super.onRestoreInstanceState(ss.getSuperState());
3020
3021        // XXX restore buffer type too, as well as lots of other stuff
3022        if (ss.text != null) {
3023            setText(ss.text);
3024        }
3025
3026        if (ss.selStart >= 0 && ss.selEnd >= 0) {
3027            if (mText instanceof Spannable) {
3028                int len = mText.length();
3029
3030                if (ss.selStart > len || ss.selEnd > len) {
3031                    String restored = "";
3032
3033                    if (ss.text != null) {
3034                        restored = "(restored) ";
3035                    }
3036
3037                    Log.e(LOG_TAG, "Saved cursor position " + ss.selStart +
3038                          "/" + ss.selEnd + " out of range for " + restored +
3039                          "text " + mText);
3040                } else {
3041                    Selection.setSelection((Spannable) mText, ss.selStart,
3042                                           ss.selEnd);
3043
3044                    if (ss.frozenWithFocus) {
3045                        mFrozenWithFocus = true;
3046                    }
3047                }
3048            }
3049        }
3050
3051        if (ss.error != null) {
3052            final CharSequence error = ss.error;
3053            // Display the error later, after the first layout pass
3054            post(new Runnable() {
3055                public void run() {
3056                    setError(error);
3057                }
3058            });
3059        }
3060    }
3061
3062    /**
3063     * Control whether this text view saves its entire text contents when
3064     * freezing to an icicle, in addition to dynamic state such as cursor
3065     * position.  By default this is false, not saving the text.  Set to true
3066     * if the text in the text view is not being saved somewhere else in
3067     * persistent storage (such as in a content provider) so that if the
3068     * view is later thawed the user will not lose their data.
3069     *
3070     * @param freezesText Controls whether a frozen icicle should include the
3071     * entire text data: true to include it, false to not.
3072     *
3073     * @attr ref android.R.styleable#TextView_freezesText
3074     */
3075    @android.view.RemotableViewMethod
3076    public void setFreezesText(boolean freezesText) {
3077        mFreezesText = freezesText;
3078    }
3079
3080    /**
3081     * Return whether this text view is including its entire text contents
3082     * in frozen icicles.
3083     *
3084     * @return Returns true if text is included, false if it isn't.
3085     *
3086     * @see #setFreezesText
3087     */
3088    public boolean getFreezesText() {
3089        return mFreezesText;
3090    }
3091
3092    ///////////////////////////////////////////////////////////////////////////
3093
3094    /**
3095     * Sets the Factory used to create new Editables.
3096     */
3097    public final void setEditableFactory(Editable.Factory factory) {
3098        mEditableFactory = factory;
3099        setText(mText);
3100    }
3101
3102    /**
3103     * Sets the Factory used to create new Spannables.
3104     */
3105    public final void setSpannableFactory(Spannable.Factory factory) {
3106        mSpannableFactory = factory;
3107        setText(mText);
3108    }
3109
3110    /**
3111     * Sets the string value of the TextView. TextView <em>does not</em> accept
3112     * HTML-like formatting, which you can do with text strings in XML resource files.
3113     * To style your strings, attach android.text.style.* objects to a
3114     * {@link android.text.SpannableString SpannableString}, or see the
3115     * <a href="{@docRoot}guide/topics/resources/available-resources.html#stringresources">
3116     * Available Resource Types</a> documentation for an example of setting
3117     * formatted text in the XML resource file.
3118     *
3119     * @attr ref android.R.styleable#TextView_text
3120     */
3121    @android.view.RemotableViewMethod
3122    public final void setText(CharSequence text) {
3123        setText(text, mBufferType);
3124    }
3125
3126    /**
3127     * Like {@link #setText(CharSequence)},
3128     * except that the cursor position (if any) is retained in the new text.
3129     *
3130     * @param text The new text to place in the text view.
3131     *
3132     * @see #setText(CharSequence)
3133     */
3134    @android.view.RemotableViewMethod
3135    public final void setTextKeepState(CharSequence text) {
3136        setTextKeepState(text, mBufferType);
3137    }
3138
3139    /**
3140     * Sets the text that this TextView is to display (see
3141     * {@link #setText(CharSequence)}) and also sets whether it is stored
3142     * in a styleable/spannable buffer and whether it is editable.
3143     *
3144     * @attr ref android.R.styleable#TextView_text
3145     * @attr ref android.R.styleable#TextView_bufferType
3146     */
3147    public void setText(CharSequence text, BufferType type) {
3148        setText(text, type, true, 0);
3149
3150        if (mCharWrapper != null) {
3151            mCharWrapper.mChars = null;
3152        }
3153    }
3154
3155    private void setText(CharSequence text, BufferType type,
3156                         boolean notifyBefore, int oldlen) {
3157        if (text == null) {
3158            text = "";
3159        }
3160
3161        // If suggestions are not enabled, remove the suggestion spans from the text
3162        if (!isSuggestionsEnabled()) {
3163            text = removeSuggestionSpans(text);
3164        }
3165
3166        if (!mUserSetTextScaleX) mTextPaint.setTextScaleX(1.0f);
3167
3168        if (text instanceof Spanned &&
3169            ((Spanned) text).getSpanStart(TextUtils.TruncateAt.MARQUEE) >= 0) {
3170            if (ViewConfiguration.get(mContext).isFadingMarqueeEnabled()) {
3171                setHorizontalFadingEdgeEnabled(true);
3172                mMarqueeFadeMode = MARQUEE_FADE_NORMAL;
3173            } else {
3174                setHorizontalFadingEdgeEnabled(false);
3175                mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
3176            }
3177            setEllipsize(TextUtils.TruncateAt.MARQUEE);
3178        }
3179
3180        int n = mFilters.length;
3181        for (int i = 0; i < n; i++) {
3182            CharSequence out = mFilters[i].filter(text, 0, text.length(),
3183                                                  EMPTY_SPANNED, 0, 0);
3184            if (out != null) {
3185                text = out;
3186            }
3187        }
3188
3189        if (notifyBefore) {
3190            if (mText != null) {
3191                oldlen = mText.length();
3192                sendBeforeTextChanged(mText, 0, oldlen, text.length());
3193            } else {
3194                sendBeforeTextChanged("", 0, 0, text.length());
3195            }
3196        }
3197
3198        boolean needEditableForNotification = false;
3199        boolean startSpellCheck = false;
3200
3201        if (mListeners != null && mListeners.size() != 0) {
3202            needEditableForNotification = true;
3203        }
3204
3205        if (type == BufferType.EDITABLE || mInput != null || needEditableForNotification) {
3206            Editable t = mEditableFactory.newEditable(text);
3207            text = t;
3208            setFilters(t, mFilters);
3209            InputMethodManager imm = InputMethodManager.peekInstance();
3210            if (imm != null) imm.restartInput(this);
3211            startSpellCheck = true;
3212        } else if (type == BufferType.SPANNABLE || mMovement != null) {
3213            text = mSpannableFactory.newSpannable(text);
3214        } else if (!(text instanceof CharWrapper)) {
3215            text = TextUtils.stringOrSpannedString(text);
3216        }
3217
3218        if (mAutoLinkMask != 0) {
3219            Spannable s2;
3220
3221            if (type == BufferType.EDITABLE || text instanceof Spannable) {
3222                s2 = (Spannable) text;
3223            } else {
3224                s2 = mSpannableFactory.newSpannable(text);
3225            }
3226
3227            if (Linkify.addLinks(s2, mAutoLinkMask)) {
3228                text = s2;
3229                type = (type == BufferType.EDITABLE) ? BufferType.EDITABLE : BufferType.SPANNABLE;
3230
3231                /*
3232                 * We must go ahead and set the text before changing the
3233                 * movement method, because setMovementMethod() may call
3234                 * setText() again to try to upgrade the buffer type.
3235                 */
3236                mText = text;
3237
3238                // Do not change the movement method for text that support text selection as it
3239                // would prevent an arbitrary cursor displacement.
3240                if (mLinksClickable && !textCanBeSelected()) {
3241                    setMovementMethod(LinkMovementMethod.getInstance());
3242                }
3243            }
3244        }
3245
3246        mBufferType = type;
3247        mText = text;
3248
3249        if (mTransformation == null) {
3250            mTransformed = text;
3251        } else {
3252            mTransformed = mTransformation.getTransformation(text, this);
3253        }
3254
3255        final int textLength = text.length();
3256
3257        if (text instanceof Spannable && !mAllowTransformationLengthChange) {
3258            Spannable sp = (Spannable) text;
3259
3260            // Remove any ChangeWatchers that might have come
3261            // from other TextViews.
3262            final ChangeWatcher[] watchers = sp.getSpans(0, sp.length(), ChangeWatcher.class);
3263            final int count = watchers.length;
3264            for (int i = 0; i < count; i++)
3265                sp.removeSpan(watchers[i]);
3266
3267            if (mChangeWatcher == null)
3268                mChangeWatcher = new ChangeWatcher();
3269
3270            sp.setSpan(mChangeWatcher, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE |
3271                       (PRIORITY << Spanned.SPAN_PRIORITY_SHIFT));
3272
3273            if (mInput != null) {
3274                sp.setSpan(mInput, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
3275            }
3276
3277            if (mTransformation != null) {
3278                sp.setSpan(mTransformation, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
3279            }
3280
3281            if (mMovement != null) {
3282                mMovement.initialize(this, (Spannable) text);
3283
3284                /*
3285                 * Initializing the movement method will have set the
3286                 * selection, so reset mSelectionMoved to keep that from
3287                 * interfering with the normal on-focus selection-setting.
3288                 */
3289                mSelectionMoved = false;
3290            }
3291        }
3292
3293        if (mLayout != null) {
3294            checkForRelayout();
3295        }
3296
3297        sendOnTextChanged(text, 0, oldlen, textLength);
3298        onTextChanged(text, 0, oldlen, textLength);
3299
3300        if (startSpellCheck && mSpellChecker != null) {
3301            // This view has to have been previously attached for mSpellChecker to exist
3302            updateSpellCheckSpans(0, textLength);
3303        }
3304
3305        if (needEditableForNotification) {
3306            sendAfterTextChanged((Editable) text);
3307        }
3308
3309        // SelectionModifierCursorController depends on textCanBeSelected, which depends on text
3310        prepareCursorControllers();
3311    }
3312
3313    /**
3314     * Sets the TextView to display the specified slice of the specified
3315     * char array.  You must promise that you will not change the contents
3316     * of the array except for right before another call to setText(),
3317     * since the TextView has no way to know that the text
3318     * has changed and that it needs to invalidate and re-layout.
3319     */
3320    public final void setText(char[] text, int start, int len) {
3321        int oldlen = 0;
3322
3323        if (start < 0 || len < 0 || start + len > text.length) {
3324            throw new IndexOutOfBoundsException(start + ", " + len);
3325        }
3326
3327        /*
3328         * We must do the before-notification here ourselves because if
3329         * the old text is a CharWrapper we destroy it before calling
3330         * into the normal path.
3331         */
3332        if (mText != null) {
3333            oldlen = mText.length();
3334            sendBeforeTextChanged(mText, 0, oldlen, len);
3335        } else {
3336            sendBeforeTextChanged("", 0, 0, len);
3337        }
3338
3339        if (mCharWrapper == null) {
3340            mCharWrapper = new CharWrapper(text, start, len);
3341        } else {
3342            mCharWrapper.set(text, start, len);
3343        }
3344
3345        setText(mCharWrapper, mBufferType, false, oldlen);
3346    }
3347
3348    private static class CharWrapper implements CharSequence, GetChars, GraphicsOperations {
3349        private char[] mChars;
3350        private int mStart, mLength;
3351
3352        public CharWrapper(char[] chars, int start, int len) {
3353            mChars = chars;
3354            mStart = start;
3355            mLength = len;
3356        }
3357
3358        /* package */ void set(char[] chars, int start, int len) {
3359            mChars = chars;
3360            mStart = start;
3361            mLength = len;
3362        }
3363
3364        public int length() {
3365            return mLength;
3366        }
3367
3368        public char charAt(int off) {
3369            return mChars[off + mStart];
3370        }
3371
3372        @Override
3373        public String toString() {
3374            return new String(mChars, mStart, mLength);
3375        }
3376
3377        public CharSequence subSequence(int start, int end) {
3378            if (start < 0 || end < 0 || start > mLength || end > mLength) {
3379                throw new IndexOutOfBoundsException(start + ", " + end);
3380            }
3381
3382            return new String(mChars, start + mStart, end - start);
3383        }
3384
3385        public void getChars(int start, int end, char[] buf, int off) {
3386            if (start < 0 || end < 0 || start > mLength || end > mLength) {
3387                throw new IndexOutOfBoundsException(start + ", " + end);
3388            }
3389
3390            System.arraycopy(mChars, start + mStart, buf, off, end - start);
3391        }
3392
3393        public void drawText(Canvas c, int start, int end,
3394                             float x, float y, Paint p) {
3395            c.drawText(mChars, start + mStart, end - start, x, y, p);
3396        }
3397
3398        public void drawTextRun(Canvas c, int start, int end,
3399                int contextStart, int contextEnd, float x, float y, int flags, Paint p) {
3400            int count = end - start;
3401            int contextCount = contextEnd - contextStart;
3402            c.drawTextRun(mChars, start + mStart, count, contextStart + mStart,
3403                    contextCount, x, y, flags, p);
3404        }
3405
3406        public float measureText(int start, int end, Paint p) {
3407            return p.measureText(mChars, start + mStart, end - start);
3408        }
3409
3410        public int getTextWidths(int start, int end, float[] widths, Paint p) {
3411            return p.getTextWidths(mChars, start + mStart, end - start, widths);
3412        }
3413
3414        public float getTextRunAdvances(int start, int end, int contextStart,
3415                int contextEnd, int flags, float[] advances, int advancesIndex,
3416                Paint p) {
3417            int count = end - start;
3418            int contextCount = contextEnd - contextStart;
3419            return p.getTextRunAdvances(mChars, start + mStart, count,
3420                    contextStart + mStart, contextCount, flags, advances,
3421                    advancesIndex);
3422        }
3423
3424        public float getTextRunAdvances(int start, int end, int contextStart,
3425                int contextEnd, int flags, float[] advances, int advancesIndex,
3426                Paint p, int reserved) {
3427            int count = end - start;
3428            int contextCount = contextEnd - contextStart;
3429            return p.getTextRunAdvances(mChars, start + mStart, count,
3430                    contextStart + mStart, contextCount, flags, advances,
3431                    advancesIndex, reserved);
3432        }
3433
3434        public int getTextRunCursor(int contextStart, int contextEnd, int flags,
3435                int offset, int cursorOpt, Paint p) {
3436            int contextCount = contextEnd - contextStart;
3437            return p.getTextRunCursor(mChars, contextStart + mStart,
3438                    contextCount, flags, offset + mStart, cursorOpt);
3439        }
3440    }
3441
3442    /**
3443     * Like {@link #setText(CharSequence, android.widget.TextView.BufferType)},
3444     * except that the cursor position (if any) is retained in the new text.
3445     *
3446     * @see #setText(CharSequence, android.widget.TextView.BufferType)
3447     */
3448    public final void setTextKeepState(CharSequence text, BufferType type) {
3449        int start = getSelectionStart();
3450        int end = getSelectionEnd();
3451        int len = text.length();
3452
3453        setText(text, type);
3454
3455        if (start >= 0 || end >= 0) {
3456            if (mText instanceof Spannable) {
3457                Selection.setSelection((Spannable) mText,
3458                                       Math.max(0, Math.min(start, len)),
3459                                       Math.max(0, Math.min(end, len)));
3460            }
3461        }
3462    }
3463
3464    @android.view.RemotableViewMethod
3465    public final void setText(int resid) {
3466        setText(getContext().getResources().getText(resid));
3467    }
3468
3469    public final void setText(int resid, BufferType type) {
3470        setText(getContext().getResources().getText(resid), type);
3471    }
3472
3473    /**
3474     * Sets the text to be displayed when the text of the TextView is empty.
3475     * Null means to use the normal empty text. The hint does not currently
3476     * participate in determining the size of the view.
3477     *
3478     * @attr ref android.R.styleable#TextView_hint
3479     */
3480    @android.view.RemotableViewMethod
3481    public final void setHint(CharSequence hint) {
3482        mHint = TextUtils.stringOrSpannedString(hint);
3483
3484        if (mLayout != null) {
3485            checkForRelayout();
3486        }
3487
3488        if (mText.length() == 0) {
3489            invalidate();
3490        }
3491    }
3492
3493    /**
3494     * Sets the text to be displayed when the text of the TextView is empty,
3495     * from a resource.
3496     *
3497     * @attr ref android.R.styleable#TextView_hint
3498     */
3499    @android.view.RemotableViewMethod
3500    public final void setHint(int resid) {
3501        setHint(getContext().getResources().getText(resid));
3502    }
3503
3504    /**
3505     * Returns the hint that is displayed when the text of the TextView
3506     * is empty.
3507     *
3508     * @attr ref android.R.styleable#TextView_hint
3509     */
3510    @ViewDebug.CapturedViewProperty
3511    public CharSequence getHint() {
3512        return mHint;
3513    }
3514
3515    private static boolean isMultilineInputType(int type) {
3516        return (type & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE)) ==
3517            (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE);
3518    }
3519
3520    /**
3521     * Set the type of the content with a constant as defined for {@link EditorInfo#inputType}. This
3522     * will take care of changing the key listener, by calling {@link #setKeyListener(KeyListener)},
3523     * to match the given content type.  If the given content type is {@link EditorInfo#TYPE_NULL}
3524     * then a soft keyboard will not be displayed for this text view.
3525     *
3526     * Note that the maximum number of displayed lines (see {@link #setMaxLines(int)}) will be
3527     * modified if you change the {@link EditorInfo#TYPE_TEXT_FLAG_MULTI_LINE} flag of the input
3528     * type.
3529     *
3530     * @see #getInputType()
3531     * @see #setRawInputType(int)
3532     * @see android.text.InputType
3533     * @attr ref android.R.styleable#TextView_inputType
3534     */
3535    public void setInputType(int type) {
3536        final boolean wasPassword = isPasswordInputType(mInputType);
3537        final boolean wasVisiblePassword = isVisiblePasswordInputType(mInputType);
3538        setInputType(type, false);
3539        final boolean isPassword = isPasswordInputType(type);
3540        final boolean isVisiblePassword = isVisiblePasswordInputType(type);
3541        boolean forceUpdate = false;
3542        if (isPassword) {
3543            setTransformationMethod(PasswordTransformationMethod.getInstance());
3544            setTypefaceByIndex(MONOSPACE, 0);
3545        } else if (isVisiblePassword) {
3546            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3547                forceUpdate = true;
3548            }
3549            setTypefaceByIndex(MONOSPACE, 0);
3550        } else if (wasPassword || wasVisiblePassword) {
3551            // not in password mode, clean up typeface and transformation
3552            setTypefaceByIndex(-1, -1);
3553            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3554                forceUpdate = true;
3555            }
3556        }
3557
3558        boolean singleLine = !isMultilineInputType(type);
3559
3560        // We need to update the single line mode if it has changed or we
3561        // were previously in password mode.
3562        if (mSingleLine != singleLine || forceUpdate) {
3563            // Change single line mode, but only change the transformation if
3564            // we are not in password mode.
3565            applySingleLine(singleLine, !isPassword, true);
3566        }
3567
3568        if (!isSuggestionsEnabled()) {
3569            mText = removeSuggestionSpans(mText);
3570        }
3571
3572        InputMethodManager imm = InputMethodManager.peekInstance();
3573        if (imm != null) imm.restartInput(this);
3574    }
3575
3576    /**
3577     * It would be better to rely on the input type for everything. A password inputType should have
3578     * a password transformation. We should hence use isPasswordInputType instead of this method.
3579     *
3580     * We should:
3581     * - Call setInputType in setKeyListener instead of changing the input type directly (which
3582     * would install the correct transformation).
3583     * - Refuse the installation of a non-password transformation in setTransformation if the input
3584     * type is password.
3585     *
3586     * However, this is like this for legacy reasons and we cannot break existing apps. This method
3587     * is useful since it matches what the user can see (obfuscated text or not).
3588     *
3589     * @return true if the current transformation method is of the password type.
3590     */
3591    private boolean hasPasswordTransformationMethod() {
3592        return mTransformation instanceof PasswordTransformationMethod;
3593    }
3594
3595    private static boolean isPasswordInputType(int inputType) {
3596        final int variation =
3597                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3598        return variation
3599                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)
3600                || variation
3601                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD)
3602                || variation
3603                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
3604    }
3605
3606    private static boolean isVisiblePasswordInputType(int inputType) {
3607        final int variation =
3608                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3609        return variation
3610                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
3611    }
3612
3613    /**
3614     * Directly change the content type integer of the text view, without
3615     * modifying any other state.
3616     * @see #setInputType(int)
3617     * @see android.text.InputType
3618     * @attr ref android.R.styleable#TextView_inputType
3619     */
3620    public void setRawInputType(int type) {
3621        mInputType = type;
3622    }
3623
3624    private void setInputType(int type, boolean direct) {
3625        final int cls = type & EditorInfo.TYPE_MASK_CLASS;
3626        KeyListener input;
3627        if (cls == EditorInfo.TYPE_CLASS_TEXT) {
3628            boolean autotext = (type & EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT) != 0;
3629            TextKeyListener.Capitalize cap;
3630            if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS) != 0) {
3631                cap = TextKeyListener.Capitalize.CHARACTERS;
3632            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS) != 0) {
3633                cap = TextKeyListener.Capitalize.WORDS;
3634            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES) != 0) {
3635                cap = TextKeyListener.Capitalize.SENTENCES;
3636            } else {
3637                cap = TextKeyListener.Capitalize.NONE;
3638            }
3639            input = TextKeyListener.getInstance(autotext, cap);
3640        } else if (cls == EditorInfo.TYPE_CLASS_NUMBER) {
3641            input = DigitsKeyListener.getInstance(
3642                    (type & EditorInfo.TYPE_NUMBER_FLAG_SIGNED) != 0,
3643                    (type & EditorInfo.TYPE_NUMBER_FLAG_DECIMAL) != 0);
3644        } else if (cls == EditorInfo.TYPE_CLASS_DATETIME) {
3645            switch (type & EditorInfo.TYPE_MASK_VARIATION) {
3646                case EditorInfo.TYPE_DATETIME_VARIATION_DATE:
3647                    input = DateKeyListener.getInstance();
3648                    break;
3649                case EditorInfo.TYPE_DATETIME_VARIATION_TIME:
3650                    input = TimeKeyListener.getInstance();
3651                    break;
3652                default:
3653                    input = DateTimeKeyListener.getInstance();
3654                    break;
3655            }
3656        } else if (cls == EditorInfo.TYPE_CLASS_PHONE) {
3657            input = DialerKeyListener.getInstance();
3658        } else {
3659            input = TextKeyListener.getInstance();
3660        }
3661        setRawInputType(type);
3662        if (direct) mInput = input;
3663        else {
3664            setKeyListenerOnly(input);
3665        }
3666    }
3667
3668    /**
3669     * Get the type of the content.
3670     *
3671     * @see #setInputType(int)
3672     * @see android.text.InputType
3673     */
3674    public int getInputType() {
3675        return mInputType;
3676    }
3677
3678    /**
3679     * Change the editor type integer associated with the text view, which
3680     * will be reported to an IME with {@link EditorInfo#imeOptions} when it
3681     * has focus.
3682     * @see #getImeOptions
3683     * @see android.view.inputmethod.EditorInfo
3684     * @attr ref android.R.styleable#TextView_imeOptions
3685     */
3686    public void setImeOptions(int imeOptions) {
3687        if (mInputContentType == null) {
3688            mInputContentType = new InputContentType();
3689        }
3690        mInputContentType.imeOptions = imeOptions;
3691    }
3692
3693    /**
3694     * Get the type of the IME editor.
3695     *
3696     * @see #setImeOptions(int)
3697     * @see android.view.inputmethod.EditorInfo
3698     */
3699    public int getImeOptions() {
3700        return mInputContentType != null
3701                ? mInputContentType.imeOptions : EditorInfo.IME_NULL;
3702    }
3703
3704    /**
3705     * Change the custom IME action associated with the text view, which
3706     * will be reported to an IME with {@link EditorInfo#actionLabel}
3707     * and {@link EditorInfo#actionId} when it has focus.
3708     * @see #getImeActionLabel
3709     * @see #getImeActionId
3710     * @see android.view.inputmethod.EditorInfo
3711     * @attr ref android.R.styleable#TextView_imeActionLabel
3712     * @attr ref android.R.styleable#TextView_imeActionId
3713     */
3714    public void setImeActionLabel(CharSequence label, int actionId) {
3715        if (mInputContentType == null) {
3716            mInputContentType = new InputContentType();
3717        }
3718        mInputContentType.imeActionLabel = label;
3719        mInputContentType.imeActionId = actionId;
3720    }
3721
3722    /**
3723     * Get the IME action label previous set with {@link #setImeActionLabel}.
3724     *
3725     * @see #setImeActionLabel
3726     * @see android.view.inputmethod.EditorInfo
3727     */
3728    public CharSequence getImeActionLabel() {
3729        return mInputContentType != null
3730                ? mInputContentType.imeActionLabel : null;
3731    }
3732
3733    /**
3734     * Get the IME action ID previous set with {@link #setImeActionLabel}.
3735     *
3736     * @see #setImeActionLabel
3737     * @see android.view.inputmethod.EditorInfo
3738     */
3739    public int getImeActionId() {
3740        return mInputContentType != null
3741                ? mInputContentType.imeActionId : 0;
3742    }
3743
3744    /**
3745     * Set a special listener to be called when an action is performed
3746     * on the text view.  This will be called when the enter key is pressed,
3747     * or when an action supplied to the IME is selected by the user.  Setting
3748     * this means that the normal hard key event will not insert a newline
3749     * into the text view, even if it is multi-line; holding down the ALT
3750     * modifier will, however, allow the user to insert a newline character.
3751     */
3752    public void setOnEditorActionListener(OnEditorActionListener l) {
3753        if (mInputContentType == null) {
3754            mInputContentType = new InputContentType();
3755        }
3756        mInputContentType.onEditorActionListener = l;
3757    }
3758
3759    /**
3760     * Called when an attached input method calls
3761     * {@link InputConnection#performEditorAction(int)
3762     * InputConnection.performEditorAction()}
3763     * for this text view.  The default implementation will call your action
3764     * listener supplied to {@link #setOnEditorActionListener}, or perform
3765     * a standard operation for {@link EditorInfo#IME_ACTION_NEXT
3766     * EditorInfo.IME_ACTION_NEXT}, {@link EditorInfo#IME_ACTION_PREVIOUS
3767     * EditorInfo.IME_ACTION_PREVIOUS}, or {@link EditorInfo#IME_ACTION_DONE
3768     * EditorInfo.IME_ACTION_DONE}.
3769     *
3770     * <p>For backwards compatibility, if no IME options have been set and the
3771     * text view would not normally advance focus on enter, then
3772     * the NEXT and DONE actions received here will be turned into an enter
3773     * key down/up pair to go through the normal key handling.
3774     *
3775     * @param actionCode The code of the action being performed.
3776     *
3777     * @see #setOnEditorActionListener
3778     */
3779    public void onEditorAction(int actionCode) {
3780        final InputContentType ict = mInputContentType;
3781        if (ict != null) {
3782            if (ict.onEditorActionListener != null) {
3783                if (ict.onEditorActionListener.onEditorAction(this,
3784                        actionCode, null)) {
3785                    return;
3786                }
3787            }
3788
3789            // This is the handling for some default action.
3790            // Note that for backwards compatibility we don't do this
3791            // default handling if explicit ime options have not been given,
3792            // instead turning this into the normal enter key codes that an
3793            // app may be expecting.
3794            if (actionCode == EditorInfo.IME_ACTION_NEXT) {
3795                View v = focusSearch(FOCUS_FORWARD);
3796                if (v != null) {
3797                    if (!v.requestFocus(FOCUS_FORWARD)) {
3798                        throw new IllegalStateException("focus search returned a view " +
3799                                "that wasn't able to take focus!");
3800                    }
3801                }
3802                return;
3803
3804            } else if (actionCode == EditorInfo.IME_ACTION_PREVIOUS) {
3805                View v = focusSearch(FOCUS_BACKWARD);
3806                if (v != null) {
3807                    if (!v.requestFocus(FOCUS_BACKWARD)) {
3808                        throw new IllegalStateException("focus search returned a view " +
3809                                "that wasn't able to take focus!");
3810                    }
3811                }
3812                return;
3813
3814            } else if (actionCode == EditorInfo.IME_ACTION_DONE) {
3815                InputMethodManager imm = InputMethodManager.peekInstance();
3816                if (imm != null && imm.isActive(this)) {
3817                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
3818                }
3819                clearFocus();
3820                return;
3821            }
3822        }
3823
3824        Handler h = getHandler();
3825        if (h != null) {
3826            long eventTime = SystemClock.uptimeMillis();
3827            h.sendMessage(h.obtainMessage(ViewRootImpl.DISPATCH_KEY_FROM_IME,
3828                    new KeyEvent(eventTime, eventTime,
3829                    KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_ENTER, 0, 0,
3830                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3831                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3832                    | KeyEvent.FLAG_EDITOR_ACTION)));
3833            h.sendMessage(h.obtainMessage(ViewRootImpl.DISPATCH_KEY_FROM_IME,
3834                    new KeyEvent(SystemClock.uptimeMillis(), eventTime,
3835                    KeyEvent.ACTION_UP, KeyEvent.KEYCODE_ENTER, 0, 0,
3836                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3837                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3838                    | KeyEvent.FLAG_EDITOR_ACTION)));
3839        }
3840    }
3841
3842    /**
3843     * Set the private content type of the text, which is the
3844     * {@link EditorInfo#privateImeOptions EditorInfo.privateImeOptions}
3845     * field that will be filled in when creating an input connection.
3846     *
3847     * @see #getPrivateImeOptions()
3848     * @see EditorInfo#privateImeOptions
3849     * @attr ref android.R.styleable#TextView_privateImeOptions
3850     */
3851    public void setPrivateImeOptions(String type) {
3852        if (mInputContentType == null) mInputContentType = new InputContentType();
3853        mInputContentType.privateImeOptions = type;
3854    }
3855
3856    /**
3857     * Get the private type of the content.
3858     *
3859     * @see #setPrivateImeOptions(String)
3860     * @see EditorInfo#privateImeOptions
3861     */
3862    public String getPrivateImeOptions() {
3863        return mInputContentType != null
3864                ? mInputContentType.privateImeOptions : null;
3865    }
3866
3867    /**
3868     * Set the extra input data of the text, which is the
3869     * {@link EditorInfo#extras TextBoxAttribute.extras}
3870     * Bundle that will be filled in when creating an input connection.  The
3871     * given integer is the resource ID of an XML resource holding an
3872     * {@link android.R.styleable#InputExtras &lt;input-extras&gt;} XML tree.
3873     *
3874     * @see #getInputExtras(boolean)
3875     * @see EditorInfo#extras
3876     * @attr ref android.R.styleable#TextView_editorExtras
3877     */
3878    public void setInputExtras(int xmlResId)
3879            throws XmlPullParserException, IOException {
3880        XmlResourceParser parser = getResources().getXml(xmlResId);
3881        if (mInputContentType == null) mInputContentType = new InputContentType();
3882        mInputContentType.extras = new Bundle();
3883        getResources().parseBundleExtras(parser, mInputContentType.extras);
3884    }
3885
3886    /**
3887     * Retrieve the input extras currently associated with the text view, which
3888     * can be viewed as well as modified.
3889     *
3890     * @param create If true, the extras will be created if they don't already
3891     * exist.  Otherwise, null will be returned if none have been created.
3892     * @see #setInputExtras(int)
3893     * @see EditorInfo#extras
3894     * @attr ref android.R.styleable#TextView_editorExtras
3895     */
3896    public Bundle getInputExtras(boolean create) {
3897        if (mInputContentType == null) {
3898            if (!create) return null;
3899            mInputContentType = new InputContentType();
3900        }
3901        if (mInputContentType.extras == null) {
3902            if (!create) return null;
3903            mInputContentType.extras = new Bundle();
3904        }
3905        return mInputContentType.extras;
3906    }
3907
3908    /**
3909     * Returns the error message that was set to be displayed with
3910     * {@link #setError}, or <code>null</code> if no error was set
3911     * or if it the error was cleared by the widget after user input.
3912     */
3913    public CharSequence getError() {
3914        return mError;
3915    }
3916
3917    /**
3918     * Sets the right-hand compound drawable of the TextView to the "error"
3919     * icon and sets an error message that will be displayed in a popup when
3920     * the TextView has focus.  The icon and error message will be reset to
3921     * null when any key events cause changes to the TextView's text.  If the
3922     * <code>error</code> is <code>null</code>, the error message and icon
3923     * will be cleared.
3924     */
3925    @android.view.RemotableViewMethod
3926    public void setError(CharSequence error) {
3927        if (error == null) {
3928            setError(null, null);
3929        } else {
3930            Drawable dr = getContext().getResources().
3931                getDrawable(com.android.internal.R.drawable.indicator_input_error);
3932
3933            dr.setBounds(0, 0, dr.getIntrinsicWidth(), dr.getIntrinsicHeight());
3934            setError(error, dr);
3935        }
3936    }
3937
3938    /**
3939     * Sets the right-hand compound drawable of the TextView to the specified
3940     * icon and sets an error message that will be displayed in a popup when
3941     * the TextView has focus.  The icon and error message will be reset to
3942     * null when any key events cause changes to the TextView's text.  The
3943     * drawable must already have had {@link Drawable#setBounds} set on it.
3944     * If the <code>error</code> is <code>null</code>, the error message will
3945     * be cleared (and you should provide a <code>null</code> icon as well).
3946     */
3947    public void setError(CharSequence error, Drawable icon) {
3948        error = TextUtils.stringOrSpannedString(error);
3949
3950        mError = error;
3951        mErrorWasChanged = true;
3952        final Drawables dr = mDrawables;
3953        if (dr != null) {
3954            switch (getResolvedLayoutDirection()) {
3955                default:
3956                case LAYOUT_DIRECTION_LTR:
3957                    setCompoundDrawables(dr.mDrawableLeft, dr.mDrawableTop, icon,
3958                            dr.mDrawableBottom);
3959                    break;
3960                case LAYOUT_DIRECTION_RTL:
3961                    setCompoundDrawables(icon, dr.mDrawableTop, dr.mDrawableRight,
3962                            dr.mDrawableBottom);
3963                    break;
3964            }
3965        } else {
3966            setCompoundDrawables(null, null, icon, null);
3967        }
3968
3969        if (error == null) {
3970            if (mPopup != null) {
3971                if (mPopup.isShowing()) {
3972                    mPopup.dismiss();
3973                }
3974
3975                mPopup = null;
3976            }
3977        } else {
3978            if (isFocused()) {
3979                showError();
3980            }
3981        }
3982    }
3983
3984    private void showError() {
3985        if (getWindowToken() == null) {
3986            mShowErrorAfterAttach = true;
3987            return;
3988        }
3989
3990        if (mPopup == null) {
3991            LayoutInflater inflater = LayoutInflater.from(getContext());
3992            final TextView err = (TextView) inflater.inflate(
3993                    com.android.internal.R.layout.textview_hint, null);
3994
3995            final float scale = getResources().getDisplayMetrics().density;
3996            mPopup = new ErrorPopup(err, (int) (200 * scale + 0.5f), (int) (50 * scale + 0.5f));
3997            mPopup.setFocusable(false);
3998            // The user is entering text, so the input method is needed.  We
3999            // don't want the popup to be displayed on top of it.
4000            mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);
4001        }
4002
4003        TextView tv = (TextView) mPopup.getContentView();
4004        chooseSize(mPopup, mError, tv);
4005        tv.setText(mError);
4006
4007        mPopup.showAsDropDown(this, getErrorX(), getErrorY());
4008        mPopup.fixDirection(mPopup.isAboveAnchor());
4009    }
4010
4011    private static class ErrorPopup extends PopupWindow {
4012        private boolean mAbove = false;
4013        private final TextView mView;
4014        private int mPopupInlineErrorBackgroundId = 0;
4015        private int mPopupInlineErrorAboveBackgroundId = 0;
4016
4017        ErrorPopup(TextView v, int width, int height) {
4018            super(v, width, height);
4019            mView = v;
4020            // Make sure the TextView has a background set as it will be used the first time it is
4021            // shown and positionned. Initialized with below background, which should have
4022            // dimensions identical to the above version for this to work (and is more likely).
4023            mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
4024                    com.android.internal.R.styleable.Theme_errorMessageBackground);
4025            mView.setBackgroundResource(mPopupInlineErrorBackgroundId);
4026        }
4027
4028        void fixDirection(boolean above) {
4029            mAbove = above;
4030
4031            if (above) {
4032                mPopupInlineErrorAboveBackgroundId =
4033                    getResourceId(mPopupInlineErrorAboveBackgroundId,
4034                            com.android.internal.R.styleable.Theme_errorMessageAboveBackground);
4035            } else {
4036                mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
4037                        com.android.internal.R.styleable.Theme_errorMessageBackground);
4038            }
4039
4040            mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId :
4041                mPopupInlineErrorBackgroundId);
4042        }
4043
4044        private int getResourceId(int currentId, int index) {
4045            if (currentId == 0) {
4046                TypedArray styledAttributes = mView.getContext().obtainStyledAttributes(
4047                        R.styleable.Theme);
4048                currentId = styledAttributes.getResourceId(index, 0);
4049                styledAttributes.recycle();
4050            }
4051            return currentId;
4052        }
4053
4054        @Override
4055        public void update(int x, int y, int w, int h, boolean force) {
4056            super.update(x, y, w, h, force);
4057
4058            boolean above = isAboveAnchor();
4059            if (above != mAbove) {
4060                fixDirection(above);
4061            }
4062        }
4063    }
4064
4065    /**
4066     * Returns the Y offset to make the pointy top of the error point
4067     * at the middle of the error icon.
4068     */
4069    private int getErrorX() {
4070        /*
4071         * The "25" is the distance between the point and the right edge
4072         * of the background
4073         */
4074        final float scale = getResources().getDisplayMetrics().density;
4075
4076        final Drawables dr = mDrawables;
4077        return getWidth() - mPopup.getWidth() - getPaddingRight() -
4078                (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f);
4079    }
4080
4081    /**
4082     * Returns the Y offset to make the pointy top of the error point
4083     * at the bottom of the error icon.
4084     */
4085    private int getErrorY() {
4086        /*
4087         * Compound, not extended, because the icon is not clipped
4088         * if the text height is smaller.
4089         */
4090        final int compoundPaddingTop = getCompoundPaddingTop();
4091        int vspace = mBottom - mTop - getCompoundPaddingBottom() - compoundPaddingTop;
4092
4093        final Drawables dr = mDrawables;
4094        int icontop = compoundPaddingTop +
4095                (vspace - (dr != null ? dr.mDrawableHeightRight : 0)) / 2;
4096
4097        /*
4098         * The "2" is the distance between the point and the top edge
4099         * of the background.
4100         */
4101        final float scale = getResources().getDisplayMetrics().density;
4102        return icontop + (dr != null ? dr.mDrawableHeightRight : 0) - getHeight() -
4103                (int) (2 * scale + 0.5f);
4104    }
4105
4106    private void hideError() {
4107        if (mPopup != null) {
4108            if (mPopup.isShowing()) {
4109                mPopup.dismiss();
4110            }
4111        }
4112
4113        mShowErrorAfterAttach = false;
4114    }
4115
4116    private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) {
4117        int wid = tv.getPaddingLeft() + tv.getPaddingRight();
4118        int ht = tv.getPaddingTop() + tv.getPaddingBottom();
4119
4120        int defaultWidthInPixels = getResources().getDimensionPixelSize(
4121                com.android.internal.R.dimen.textview_error_popup_default_width);
4122        Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels,
4123                                    Layout.Alignment.ALIGN_NORMAL, 1, 0, true);
4124        float max = 0;
4125        for (int i = 0; i < l.getLineCount(); i++) {
4126            max = Math.max(max, l.getLineWidth(i));
4127        }
4128
4129        /*
4130         * Now set the popup size to be big enough for the text plus the border capped
4131         * to DEFAULT_MAX_POPUP_WIDTH
4132         */
4133        pop.setWidth(wid + (int) Math.ceil(max));
4134        pop.setHeight(ht + l.getHeight());
4135    }
4136
4137
4138    @Override
4139    protected boolean setFrame(int l, int t, int r, int b) {
4140        boolean result = super.setFrame(l, t, r, b);
4141
4142        if (mPopup != null) {
4143            TextView tv = (TextView) mPopup.getContentView();
4144            chooseSize(mPopup, mError, tv);
4145            mPopup.update(this, getErrorX(), getErrorY(),
4146                          mPopup.getWidth(), mPopup.getHeight());
4147        }
4148
4149        restartMarqueeIfNeeded();
4150
4151        return result;
4152    }
4153
4154    private void restartMarqueeIfNeeded() {
4155        if (mRestartMarquee && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
4156            mRestartMarquee = false;
4157            startMarquee();
4158        }
4159    }
4160
4161    /**
4162     * Sets the list of input filters that will be used if the buffer is
4163     * Editable.  Has no effect otherwise.
4164     *
4165     * @attr ref android.R.styleable#TextView_maxLength
4166     */
4167    public void setFilters(InputFilter[] filters) {
4168        if (filters == null) {
4169            throw new IllegalArgumentException();
4170        }
4171
4172        mFilters = filters;
4173
4174        if (mText instanceof Editable) {
4175            setFilters((Editable) mText, filters);
4176        }
4177    }
4178
4179    /**
4180     * Sets the list of input filters on the specified Editable,
4181     * and includes mInput in the list if it is an InputFilter.
4182     */
4183    private void setFilters(Editable e, InputFilter[] filters) {
4184        if (mInput instanceof InputFilter) {
4185            InputFilter[] nf = new InputFilter[filters.length + 1];
4186
4187            System.arraycopy(filters, 0, nf, 0, filters.length);
4188            nf[filters.length] = (InputFilter) mInput;
4189
4190            e.setFilters(nf);
4191        } else {
4192            e.setFilters(filters);
4193        }
4194    }
4195
4196    /**
4197     * Returns the current list of input filters.
4198     */
4199    public InputFilter[] getFilters() {
4200        return mFilters;
4201    }
4202
4203    /////////////////////////////////////////////////////////////////////////
4204
4205    private int getVerticalOffset(boolean forceNormal) {
4206        int voffset = 0;
4207        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
4208
4209        Layout l = mLayout;
4210        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
4211            l = mHintLayout;
4212        }
4213
4214        if (gravity != Gravity.TOP) {
4215            int boxht;
4216
4217            if (l == mHintLayout) {
4218                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
4219                        getCompoundPaddingBottom();
4220            } else {
4221                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
4222                        getExtendedPaddingBottom();
4223            }
4224            int textht = l.getHeight();
4225
4226            if (textht < boxht) {
4227                if (gravity == Gravity.BOTTOM)
4228                    voffset = boxht - textht;
4229                else // (gravity == Gravity.CENTER_VERTICAL)
4230                    voffset = (boxht - textht) >> 1;
4231            }
4232        }
4233        return voffset;
4234    }
4235
4236    private int getBottomVerticalOffset(boolean forceNormal) {
4237        int voffset = 0;
4238        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
4239
4240        Layout l = mLayout;
4241        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
4242            l = mHintLayout;
4243        }
4244
4245        if (gravity != Gravity.BOTTOM) {
4246            int boxht;
4247
4248            if (l == mHintLayout) {
4249                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
4250                        getCompoundPaddingBottom();
4251            } else {
4252                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
4253                        getExtendedPaddingBottom();
4254            }
4255            int textht = l.getHeight();
4256
4257            if (textht < boxht) {
4258                if (gravity == Gravity.TOP)
4259                    voffset = boxht - textht;
4260                else // (gravity == Gravity.CENTER_VERTICAL)
4261                    voffset = (boxht - textht) >> 1;
4262            }
4263        }
4264        return voffset;
4265    }
4266
4267    private void invalidateCursorPath() {
4268        if (mHighlightPathBogus) {
4269            invalidateCursor();
4270        } else {
4271            final int horizontalPadding = getCompoundPaddingLeft();
4272            final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
4273
4274            if (mCursorCount == 0) {
4275                synchronized (sTempRect) {
4276                    /*
4277                     * The reason for this concern about the thickness of the
4278                     * cursor and doing the floor/ceil on the coordinates is that
4279                     * some EditTexts (notably textfields in the Browser) have
4280                     * anti-aliased text where not all the characters are
4281                     * necessarily at integer-multiple locations.  This should
4282                     * make sure the entire cursor gets invalidated instead of
4283                     * sometimes missing half a pixel.
4284                     */
4285                    float thick = FloatMath.ceil(mTextPaint.getStrokeWidth());
4286                    if (thick < 1.0f) {
4287                        thick = 1.0f;
4288                    }
4289
4290                    thick /= 2.0f;
4291
4292                    mHighlightPath.computeBounds(sTempRect, false);
4293
4294                    invalidate((int) FloatMath.floor(horizontalPadding + sTempRect.left - thick),
4295                            (int) FloatMath.floor(verticalPadding + sTempRect.top - thick),
4296                            (int) FloatMath.ceil(horizontalPadding + sTempRect.right + thick),
4297                            (int) FloatMath.ceil(verticalPadding + sTempRect.bottom + thick));
4298                }
4299            } else {
4300                for (int i = 0; i < mCursorCount; i++) {
4301                    Rect bounds = mCursorDrawable[i].getBounds();
4302                    invalidate(bounds.left + horizontalPadding, bounds.top + verticalPadding,
4303                            bounds.right + horizontalPadding, bounds.bottom + verticalPadding);
4304                }
4305            }
4306        }
4307    }
4308
4309    private void invalidateCursor() {
4310        int where = getSelectionEnd();
4311
4312        invalidateCursor(where, where, where);
4313    }
4314
4315    private void invalidateCursor(int a, int b, int c) {
4316        if (a >= 0 || b >= 0 || c >= 0) {
4317            int start = Math.min(Math.min(a, b), c);
4318            int end = Math.max(Math.max(a, b), c);
4319            invalidateRegion(start, end);
4320        }
4321    }
4322
4323    /**
4324     * Invalidates the region of text enclosed between the start and end text offsets.
4325     *
4326     * @hide
4327     */
4328    void invalidateRegion(int start, int end) {
4329        if (mLayout == null) {
4330            invalidate();
4331        } else {
4332                int lineStart = mLayout.getLineForOffset(start);
4333                int top = mLayout.getLineTop(lineStart);
4334
4335                // This is ridiculous, but the descent from the line above
4336                // can hang down into the line we really want to redraw,
4337                // so we have to invalidate part of the line above to make
4338                // sure everything that needs to be redrawn really is.
4339                // (But not the whole line above, because that would cause
4340                // the same problem with the descenders on the line above it!)
4341                if (lineStart > 0) {
4342                    top -= mLayout.getLineDescent(lineStart - 1);
4343                }
4344
4345                int lineEnd;
4346
4347                if (start == end)
4348                    lineEnd = lineStart;
4349                else
4350                    lineEnd = mLayout.getLineForOffset(end);
4351
4352                int bottom = mLayout.getLineBottom(lineEnd);
4353
4354                final int compoundPaddingLeft = getCompoundPaddingLeft();
4355                final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
4356
4357                int left, right;
4358                if (lineStart == lineEnd) {
4359                    left = (int) mLayout.getPrimaryHorizontal(start);
4360                    right = (int) (mLayout.getPrimaryHorizontal(end) + 1.0);
4361                    left += compoundPaddingLeft;
4362                    right += compoundPaddingLeft;
4363                } else {
4364                    // Rectangle bounding box when the region spans several lines
4365                    left = compoundPaddingLeft;
4366                    right = getWidth() - getCompoundPaddingRight();
4367                }
4368
4369                invalidate(mScrollX + left, verticalPadding + top,
4370                        mScrollX + right, verticalPadding + bottom);
4371        }
4372    }
4373
4374    private void registerForPreDraw() {
4375        final ViewTreeObserver observer = getViewTreeObserver();
4376
4377        if (mPreDrawState == PREDRAW_NOT_REGISTERED) {
4378            observer.addOnPreDrawListener(this);
4379            mPreDrawState = PREDRAW_PENDING;
4380        } else if (mPreDrawState == PREDRAW_DONE) {
4381            mPreDrawState = PREDRAW_PENDING;
4382        }
4383
4384        // else state is PREDRAW_PENDING, so keep waiting.
4385    }
4386
4387    /**
4388     * {@inheritDoc}
4389     */
4390    public boolean onPreDraw() {
4391        if (mPreDrawState != PREDRAW_PENDING) {
4392            return true;
4393        }
4394
4395        if (mLayout == null) {
4396            assumeLayout();
4397        }
4398
4399        boolean changed = false;
4400
4401        if (mMovement != null) {
4402            /* This code also provides auto-scrolling when a cursor is moved using a
4403             * CursorController (insertion point or selection limits).
4404             * For selection, ensure start or end is visible depending on controller's state.
4405             */
4406            int curs = getSelectionEnd();
4407            // Do not create the controller if it is not already created.
4408            if (mSelectionModifierCursorController != null &&
4409                    mSelectionModifierCursorController.isSelectionStartDragged()) {
4410                curs = getSelectionStart();
4411            }
4412
4413            /*
4414             * TODO: This should really only keep the end in view if
4415             * it already was before the text changed.  I'm not sure
4416             * of a good way to tell from here if it was.
4417             */
4418            if (curs < 0 &&
4419                  (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
4420                curs = mText.length();
4421            }
4422
4423            if (curs >= 0) {
4424                changed = bringPointIntoView(curs);
4425            }
4426        } else {
4427            changed = bringTextIntoView();
4428        }
4429
4430        // This has to be checked here since:
4431        // - onFocusChanged cannot start it when focus is given to a view with selected text (after
4432        //   a screen rotation) since layout is not yet initialized at that point.
4433        if (mCreatedWithASelection) {
4434            startSelectionActionMode();
4435            mCreatedWithASelection = false;
4436        }
4437
4438        // Phone specific code (there is no ExtractEditText on tablets).
4439        // ExtractEditText does not call onFocus when it is displayed, and mHasSelectionOnFocus can
4440        // not be set. Do the test here instead.
4441        if (this instanceof ExtractEditText && hasSelection()) {
4442            startSelectionActionMode();
4443        }
4444
4445        mPreDrawState = PREDRAW_DONE;
4446        return !changed;
4447    }
4448
4449    @Override
4450    protected void onAttachedToWindow() {
4451        super.onAttachedToWindow();
4452
4453        mTemporaryDetach = false;
4454
4455        if (mShowErrorAfterAttach) {
4456            showError();
4457            mShowErrorAfterAttach = false;
4458        }
4459
4460        final ViewTreeObserver observer = getViewTreeObserver();
4461        // No need to create the controller.
4462        // The get method will add the listener on controller creation.
4463        if (mInsertionPointCursorController != null) {
4464            observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
4465        }
4466        if (mSelectionModifierCursorController != null) {
4467            observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
4468        }
4469
4470        // Resolve drawables as the layout direction has been resolved
4471        resolveDrawables();
4472
4473        updateSpellCheckSpans(0, mText.length());
4474    }
4475
4476    @Override
4477    protected void onDetachedFromWindow() {
4478        super.onDetachedFromWindow();
4479
4480        final ViewTreeObserver observer = getViewTreeObserver();
4481        if (mPreDrawState != PREDRAW_NOT_REGISTERED) {
4482            observer.removeOnPreDrawListener(this);
4483            mPreDrawState = PREDRAW_NOT_REGISTERED;
4484        }
4485
4486        if (mError != null) {
4487            hideError();
4488        }
4489
4490        if (mBlink != null) {
4491            mBlink.removeCallbacks(mBlink);
4492        }
4493
4494        if (mInsertionPointCursorController != null) {
4495            mInsertionPointCursorController.onDetached();
4496        }
4497
4498        if (mSelectionModifierCursorController != null) {
4499            mSelectionModifierCursorController.onDetached();
4500        }
4501
4502        hideControllers();
4503
4504        resetResolvedDrawables();
4505
4506        if (mSpellChecker != null) {
4507            mSpellChecker.closeSession();
4508            // Forces the creation of a new SpellChecker next time this window is created.
4509            // Will handle the cases where the settings has been changed in the meantime.
4510            mSpellChecker = null;
4511        }
4512    }
4513
4514    @Override
4515    protected boolean isPaddingOffsetRequired() {
4516        return mShadowRadius != 0 || mDrawables != null;
4517    }
4518
4519    @Override
4520    protected int getLeftPaddingOffset() {
4521        return getCompoundPaddingLeft() - mPaddingLeft +
4522                (int) Math.min(0, mShadowDx - mShadowRadius);
4523    }
4524
4525    @Override
4526    protected int getTopPaddingOffset() {
4527        return (int) Math.min(0, mShadowDy - mShadowRadius);
4528    }
4529
4530    @Override
4531    protected int getBottomPaddingOffset() {
4532        return (int) Math.max(0, mShadowDy + mShadowRadius);
4533    }
4534
4535    @Override
4536    protected int getRightPaddingOffset() {
4537        return -(getCompoundPaddingRight() - mPaddingRight) +
4538                (int) Math.max(0, mShadowDx + mShadowRadius);
4539    }
4540
4541    @Override
4542    protected boolean verifyDrawable(Drawable who) {
4543        final boolean verified = super.verifyDrawable(who);
4544        if (!verified && mDrawables != null) {
4545            return who == mDrawables.mDrawableLeft || who == mDrawables.mDrawableTop ||
4546                    who == mDrawables.mDrawableRight || who == mDrawables.mDrawableBottom ||
4547                    who == mDrawables.mDrawableStart || who == mDrawables.mDrawableEnd;
4548        }
4549        return verified;
4550    }
4551
4552    @Override
4553    public void jumpDrawablesToCurrentState() {
4554        super.jumpDrawablesToCurrentState();
4555        if (mDrawables != null) {
4556            if (mDrawables.mDrawableLeft != null) {
4557                mDrawables.mDrawableLeft.jumpToCurrentState();
4558            }
4559            if (mDrawables.mDrawableTop != null) {
4560                mDrawables.mDrawableTop.jumpToCurrentState();
4561            }
4562            if (mDrawables.mDrawableRight != null) {
4563                mDrawables.mDrawableRight.jumpToCurrentState();
4564            }
4565            if (mDrawables.mDrawableBottom != null) {
4566                mDrawables.mDrawableBottom.jumpToCurrentState();
4567            }
4568            if (mDrawables.mDrawableStart != null) {
4569                mDrawables.mDrawableStart.jumpToCurrentState();
4570            }
4571            if (mDrawables.mDrawableEnd != null) {
4572                mDrawables.mDrawableEnd.jumpToCurrentState();
4573            }
4574        }
4575    }
4576
4577    @Override
4578    public void invalidateDrawable(Drawable drawable) {
4579        if (verifyDrawable(drawable)) {
4580            final Rect dirty = drawable.getBounds();
4581            int scrollX = mScrollX;
4582            int scrollY = mScrollY;
4583
4584            // IMPORTANT: The coordinates below are based on the coordinates computed
4585            // for each compound drawable in onDraw(). Make sure to update each section
4586            // accordingly.
4587            final TextView.Drawables drawables = mDrawables;
4588            if (drawables != null) {
4589                if (drawable == drawables.mDrawableLeft) {
4590                    final int compoundPaddingTop = getCompoundPaddingTop();
4591                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4592                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4593
4594                    scrollX += mPaddingLeft;
4595                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightLeft) / 2;
4596                } else if (drawable == drawables.mDrawableRight) {
4597                    final int compoundPaddingTop = getCompoundPaddingTop();
4598                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4599                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4600
4601                    scrollX += (mRight - mLeft - mPaddingRight - drawables.mDrawableSizeRight);
4602                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightRight) / 2;
4603                } else if (drawable == drawables.mDrawableTop) {
4604                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4605                    final int compoundPaddingRight = getCompoundPaddingRight();
4606                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4607
4608                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthTop) / 2;
4609                    scrollY += mPaddingTop;
4610                } else if (drawable == drawables.mDrawableBottom) {
4611                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4612                    final int compoundPaddingRight = getCompoundPaddingRight();
4613                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4614
4615                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthBottom) / 2;
4616                    scrollY += (mBottom - mTop - mPaddingBottom - drawables.mDrawableSizeBottom);
4617                }
4618            }
4619
4620            invalidate(dirty.left + scrollX, dirty.top + scrollY,
4621                    dirty.right + scrollX, dirty.bottom + scrollY);
4622        }
4623    }
4624
4625    /**
4626     * @hide
4627     */
4628    @Override
4629    public int getResolvedLayoutDirection(Drawable who) {
4630        if (who == null) return View.LAYOUT_DIRECTION_LTR;
4631        if (mDrawables != null) {
4632            final Drawables drawables = mDrawables;
4633            if (who == drawables.mDrawableLeft || who == drawables.mDrawableRight ||
4634                who == drawables.mDrawableTop || who == drawables.mDrawableBottom ||
4635                who == drawables.mDrawableStart || who == drawables.mDrawableEnd) {
4636                return getResolvedLayoutDirection();
4637            }
4638        }
4639        return super.getResolvedLayoutDirection(who);
4640    }
4641
4642    @Override
4643    protected boolean onSetAlpha(int alpha) {
4644        // Alpha is supported if and only if the drawing can be done in one pass.
4645        // TODO text with spans with a background color currently do not respect this alpha.
4646        if (getBackground() == null) {
4647            mCurrentAlpha = alpha;
4648            final Drawables dr = mDrawables;
4649            if (dr != null) {
4650                if (dr.mDrawableLeft != null) dr.mDrawableLeft.mutate().setAlpha(alpha);
4651                if (dr.mDrawableTop != null) dr.mDrawableTop.mutate().setAlpha(alpha);
4652                if (dr.mDrawableRight != null) dr.mDrawableRight.mutate().setAlpha(alpha);
4653                if (dr.mDrawableBottom != null) dr.mDrawableBottom.mutate().setAlpha(alpha);
4654                if (dr.mDrawableStart != null) dr.mDrawableStart.mutate().setAlpha(alpha);
4655                if (dr.mDrawableEnd != null) dr.mDrawableEnd.mutate().setAlpha(alpha);
4656            }
4657            return true;
4658        }
4659
4660        mCurrentAlpha = 255;
4661        return false;
4662    }
4663
4664    /**
4665     * When a TextView is used to display a useful piece of information to the user (such as a
4666     * contact's address), it should be made selectable, so that the user can select and copy this
4667     * content.
4668     *
4669     * Use {@link #setTextIsSelectable(boolean)} or the
4670     * {@link android.R.styleable#TextView_textIsSelectable} XML attribute to make this TextView
4671     * selectable (text is not selectable by default).
4672     *
4673     * Note that this method simply returns the state of this flag. Although this flag has to be set
4674     * in order to select text in non-editable TextView, the content of an {@link EditText} can
4675     * always be selected, independently of the value of this flag.
4676     *
4677     * @return True if the text displayed in this TextView can be selected by the user.
4678     *
4679     * @attr ref android.R.styleable#TextView_textIsSelectable
4680     */
4681    public boolean isTextSelectable() {
4682        return mTextIsSelectable;
4683    }
4684
4685    /**
4686     * Sets whether or not (default) the content of this view is selectable by the user.
4687     *
4688     * Note that this methods affect the {@link #setFocusable(boolean)},
4689     * {@link #setFocusableInTouchMode(boolean)} {@link #setClickable(boolean)} and
4690     * {@link #setLongClickable(boolean)} states and you may want to restore these if they were
4691     * customized.
4692     *
4693     * See {@link #isTextSelectable} for details.
4694     *
4695     * @param selectable Whether or not the content of this TextView should be selectable.
4696     */
4697    public void setTextIsSelectable(boolean selectable) {
4698        if (mTextIsSelectable == selectable) return;
4699
4700        mTextIsSelectable = selectable;
4701
4702        setFocusableInTouchMode(selectable);
4703        setFocusable(selectable);
4704        setClickable(selectable);
4705        setLongClickable(selectable);
4706
4707        // mInputType is already EditorInfo.TYPE_NULL and mInput is null;
4708
4709        setMovementMethod(selectable ? ArrowKeyMovementMethod.getInstance() : null);
4710        setText(getText(), selectable ? BufferType.SPANNABLE : BufferType.NORMAL);
4711
4712        // Called by setText above, but safer in case of future code changes
4713        prepareCursorControllers();
4714    }
4715
4716    @Override
4717    protected int[] onCreateDrawableState(int extraSpace) {
4718        final int[] drawableState;
4719
4720        if (mSingleLine) {
4721            drawableState = super.onCreateDrawableState(extraSpace);
4722        } else {
4723            drawableState = super.onCreateDrawableState(extraSpace + 1);
4724            mergeDrawableStates(drawableState, MULTILINE_STATE_SET);
4725        }
4726
4727        if (mTextIsSelectable) {
4728            // Disable pressed state, which was introduced when TextView was made clickable.
4729            // Prevents text color change.
4730            // setClickable(false) would have a similar effect, but it also disables focus changes
4731            // and long press actions, which are both needed by text selection.
4732            final int length = drawableState.length;
4733            for (int i = 0; i < length; i++) {
4734                if (drawableState[i] == R.attr.state_pressed) {
4735                    final int[] nonPressedState = new int[length - 1];
4736                    System.arraycopy(drawableState, 0, nonPressedState, 0, i);
4737                    System.arraycopy(drawableState, i + 1, nonPressedState, i, length - i - 1);
4738                    return nonPressedState;
4739                }
4740            }
4741        }
4742
4743        return drawableState;
4744    }
4745
4746    @Override
4747    protected void onDraw(Canvas canvas) {
4748        if (mPreDrawState == PREDRAW_DONE) {
4749            final ViewTreeObserver observer = getViewTreeObserver();
4750            observer.removeOnPreDrawListener(this);
4751            mPreDrawState = PREDRAW_NOT_REGISTERED;
4752        }
4753
4754        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return;
4755
4756        restartMarqueeIfNeeded();
4757
4758        // Draw the background for this view
4759        super.onDraw(canvas);
4760
4761        final int compoundPaddingLeft = getCompoundPaddingLeft();
4762        final int compoundPaddingTop = getCompoundPaddingTop();
4763        final int compoundPaddingRight = getCompoundPaddingRight();
4764        final int compoundPaddingBottom = getCompoundPaddingBottom();
4765        final int scrollX = mScrollX;
4766        final int scrollY = mScrollY;
4767        final int right = mRight;
4768        final int left = mLeft;
4769        final int bottom = mBottom;
4770        final int top = mTop;
4771
4772        final Drawables dr = mDrawables;
4773        if (dr != null) {
4774            /*
4775             * Compound, not extended, because the icon is not clipped
4776             * if the text height is smaller.
4777             */
4778
4779            int vspace = bottom - top - compoundPaddingBottom - compoundPaddingTop;
4780            int hspace = right - left - compoundPaddingRight - compoundPaddingLeft;
4781
4782            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4783            // Make sure to update invalidateDrawable() when changing this code.
4784            if (dr.mDrawableLeft != null) {
4785                canvas.save();
4786                canvas.translate(scrollX + mPaddingLeft,
4787                                 scrollY + compoundPaddingTop +
4788                                 (vspace - dr.mDrawableHeightLeft) / 2);
4789                dr.mDrawableLeft.draw(canvas);
4790                canvas.restore();
4791            }
4792
4793            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4794            // Make sure to update invalidateDrawable() when changing this code.
4795            if (dr.mDrawableRight != null) {
4796                canvas.save();
4797                canvas.translate(scrollX + right - left - mPaddingRight - dr.mDrawableSizeRight,
4798                         scrollY + compoundPaddingTop + (vspace - dr.mDrawableHeightRight) / 2);
4799                dr.mDrawableRight.draw(canvas);
4800                canvas.restore();
4801            }
4802
4803            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4804            // Make sure to update invalidateDrawable() when changing this code.
4805            if (dr.mDrawableTop != null) {
4806                canvas.save();
4807                canvas.translate(scrollX + compoundPaddingLeft + (hspace - dr.mDrawableWidthTop) / 2,
4808                        scrollY + mPaddingTop);
4809                dr.mDrawableTop.draw(canvas);
4810                canvas.restore();
4811            }
4812
4813            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4814            // Make sure to update invalidateDrawable() when changing this code.
4815            if (dr.mDrawableBottom != null) {
4816                canvas.save();
4817                canvas.translate(scrollX + compoundPaddingLeft +
4818                        (hspace - dr.mDrawableWidthBottom) / 2,
4819                         scrollY + bottom - top - mPaddingBottom - dr.mDrawableSizeBottom);
4820                dr.mDrawableBottom.draw(canvas);
4821                canvas.restore();
4822            }
4823        }
4824
4825        int color = mCurTextColor;
4826
4827        if (mLayout == null) {
4828            assumeLayout();
4829        }
4830
4831        Layout layout = mLayout;
4832        int cursorcolor = color;
4833
4834        if (mHint != null && mText.length() == 0) {
4835            if (mHintTextColor != null) {
4836                color = mCurHintTextColor;
4837            }
4838
4839            layout = mHintLayout;
4840        }
4841
4842        mTextPaint.setColor(color);
4843        if (mCurrentAlpha != 255) {
4844            // If set, the alpha will override the color's alpha. Multiply the alphas.
4845            mTextPaint.setAlpha((mCurrentAlpha * Color.alpha(color)) / 255);
4846        }
4847        mTextPaint.drawableState = getDrawableState();
4848
4849        canvas.save();
4850        /*  Would be faster if we didn't have to do this. Can we chop the
4851            (displayable) text so that we don't need to do this ever?
4852        */
4853
4854        int extendedPaddingTop = getExtendedPaddingTop();
4855        int extendedPaddingBottom = getExtendedPaddingBottom();
4856
4857        float clipLeft = compoundPaddingLeft + scrollX;
4858        float clipTop = extendedPaddingTop + scrollY;
4859        float clipRight = right - left - compoundPaddingRight + scrollX;
4860        float clipBottom = bottom - top - extendedPaddingBottom + scrollY;
4861
4862        if (mShadowRadius != 0) {
4863            clipLeft += Math.min(0, mShadowDx - mShadowRadius);
4864            clipRight += Math.max(0, mShadowDx + mShadowRadius);
4865
4866            clipTop += Math.min(0, mShadowDy - mShadowRadius);
4867            clipBottom += Math.max(0, mShadowDy + mShadowRadius);
4868        }
4869
4870        canvas.clipRect(clipLeft, clipTop, clipRight, clipBottom);
4871
4872        int voffsetText = 0;
4873        int voffsetCursor = 0;
4874
4875        // translate in by our padding
4876        {
4877            /* shortcircuit calling getVerticaOffset() */
4878            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4879                voffsetText = getVerticalOffset(false);
4880                voffsetCursor = getVerticalOffset(true);
4881            }
4882            canvas.translate(compoundPaddingLeft, extendedPaddingTop + voffsetText);
4883        }
4884
4885        final int layoutDirection = getResolvedLayoutDirection();
4886        final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
4887        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
4888                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
4889            if (!mSingleLine && getLineCount() == 1 && canMarquee() &&
4890                    (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) != Gravity.LEFT) {
4891                canvas.translate(mLayout.getLineRight(0) - (mRight - mLeft -
4892                        getCompoundPaddingLeft() - getCompoundPaddingRight()), 0.0f);
4893            }
4894
4895            if (mMarquee != null && mMarquee.isRunning()) {
4896                canvas.translate(-mMarquee.mScroll, 0.0f);
4897            }
4898        }
4899
4900        Path highlight = null;
4901        int selStart = -1, selEnd = -1;
4902        boolean drawCursor = false;
4903
4904        //  If there is no movement method, then there can be no selection.
4905        //  Check that first and attempt to skip everything having to do with
4906        //  the cursor.
4907        //  XXX This is not strictly true -- a program could set the
4908        //  selection manually if it really wanted to.
4909        if (mMovement != null && (isFocused() || isPressed())) {
4910            selStart = getSelectionStart();
4911            selEnd = getSelectionEnd();
4912
4913            if (selStart >= 0) {
4914                if (mHighlightPath == null) mHighlightPath = new Path();
4915
4916                if (selStart == selEnd) {
4917                    if (isCursorVisible() &&
4918                            (SystemClock.uptimeMillis() - mShowCursor) % (2 * BLINK) < BLINK) {
4919                        if (mHighlightPathBogus) {
4920                            mHighlightPath.reset();
4921                            mLayout.getCursorPath(selStart, mHighlightPath, mText);
4922                            updateCursorsPositions();
4923                            mHighlightPathBogus = false;
4924                        }
4925
4926                        // XXX should pass to skin instead of drawing directly
4927                        mHighlightPaint.setColor(cursorcolor);
4928                        if (mCurrentAlpha != 255) {
4929                            mHighlightPaint.setAlpha(
4930                                    (mCurrentAlpha * Color.alpha(cursorcolor)) / 255);
4931                        }
4932                        mHighlightPaint.setStyle(Paint.Style.STROKE);
4933                        highlight = mHighlightPath;
4934                        drawCursor = mCursorCount > 0;
4935                    }
4936                } else if (textCanBeSelected()) {
4937                    if (mHighlightPathBogus) {
4938                        mHighlightPath.reset();
4939                        mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
4940                        mHighlightPathBogus = false;
4941                    }
4942
4943                    // XXX should pass to skin instead of drawing directly
4944                    mHighlightPaint.setColor(mHighlightColor);
4945                    if (mCurrentAlpha != 255) {
4946                        mHighlightPaint.setAlpha(
4947                                (mCurrentAlpha * Color.alpha(mHighlightColor)) / 255);
4948                    }
4949                    mHighlightPaint.setStyle(Paint.Style.FILL);
4950
4951                    highlight = mHighlightPath;
4952                }
4953            }
4954        }
4955
4956        /*  Comment out until we decide what to do about animations
4957        boolean isLinearTextOn = false;
4958        if (currentTransformation != null) {
4959            isLinearTextOn = mTextPaint.isLinearTextOn();
4960            Matrix m = currentTransformation.getMatrix();
4961            if (!m.isIdentity()) {
4962                // mTextPaint.setLinearTextOn(true);
4963            }
4964        }
4965        */
4966
4967        final InputMethodState ims = mInputMethodState;
4968        final int cursorOffsetVertical = voffsetCursor - voffsetText;
4969        if (ims != null && ims.mBatchEditNesting == 0) {
4970            InputMethodManager imm = InputMethodManager.peekInstance();
4971            if (imm != null) {
4972                if (imm.isActive(this)) {
4973                    boolean reported = false;
4974                    if (ims.mContentChanged || ims.mSelectionModeChanged) {
4975                        // We are in extract mode and the content has changed
4976                        // in some way... just report complete new text to the
4977                        // input method.
4978                        reported = reportExtractedText();
4979                    }
4980                    if (!reported && highlight != null) {
4981                        int candStart = -1;
4982                        int candEnd = -1;
4983                        if (mText instanceof Spannable) {
4984                            Spannable sp = (Spannable)mText;
4985                            candStart = EditableInputConnection.getComposingSpanStart(sp);
4986                            candEnd = EditableInputConnection.getComposingSpanEnd(sp);
4987                        }
4988                        imm.updateSelection(this, selStart, selEnd, candStart, candEnd);
4989                    }
4990                }
4991
4992                if (imm.isWatchingCursor(this) && highlight != null) {
4993                    highlight.computeBounds(ims.mTmpRectF, true);
4994                    ims.mTmpOffset[0] = ims.mTmpOffset[1] = 0;
4995
4996                    canvas.getMatrix().mapPoints(ims.mTmpOffset);
4997                    ims.mTmpRectF.offset(ims.mTmpOffset[0], ims.mTmpOffset[1]);
4998
4999                    ims.mTmpRectF.offset(0, cursorOffsetVertical);
5000
5001                    ims.mCursorRectInWindow.set((int)(ims.mTmpRectF.left + 0.5),
5002                            (int)(ims.mTmpRectF.top + 0.5),
5003                            (int)(ims.mTmpRectF.right + 0.5),
5004                            (int)(ims.mTmpRectF.bottom + 0.5));
5005
5006                    imm.updateCursor(this,
5007                            ims.mCursorRectInWindow.left, ims.mCursorRectInWindow.top,
5008                            ims.mCursorRectInWindow.right, ims.mCursorRectInWindow.bottom);
5009                }
5010            }
5011        }
5012
5013        if (mCorrectionHighlighter != null) {
5014            mCorrectionHighlighter.draw(canvas, cursorOffsetVertical);
5015        }
5016
5017        if (drawCursor) {
5018            drawCursor(canvas, cursorOffsetVertical);
5019            // Rely on the drawable entirely, do not draw the cursor line.
5020            // Has to be done after the IMM related code above which relies on the highlight.
5021            highlight = null;
5022        }
5023
5024        layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
5025
5026        if (mMarquee != null && mMarquee.shouldDrawGhost()) {
5027            canvas.translate((int) mMarquee.getGhostOffset(), 0.0f);
5028            layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
5029        }
5030
5031        /*  Comment out until we decide what to do about animations
5032        if (currentTransformation != null) {
5033            mTextPaint.setLinearTextOn(isLinearTextOn);
5034        }
5035        */
5036
5037        canvas.restore();
5038    }
5039
5040    private void updateCursorsPositions() {
5041        if (mCursorDrawableRes == 0) {
5042            mCursorCount = 0;
5043            return;
5044        }
5045
5046        final int offset = getSelectionStart();
5047        final int line = mLayout.getLineForOffset(offset);
5048        final int top = mLayout.getLineTop(line);
5049        final int bottom = mLayout.getLineTop(line + 1);
5050
5051        mCursorCount = mLayout.isLevelBoundary(offset) ? 2 : 1;
5052
5053        int middle = bottom;
5054        if (mCursorCount == 2) {
5055            // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)}
5056            middle = (top + bottom) >> 1;
5057        }
5058
5059        updateCursorPosition(0, top, middle, mLayout.getPrimaryHorizontal(offset));
5060
5061        if (mCursorCount == 2) {
5062            updateCursorPosition(1, middle, bottom, mLayout.getSecondaryHorizontal(offset));
5063        }
5064    }
5065
5066    private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) {
5067        if (mCursorDrawable[cursorIndex] == null)
5068            mCursorDrawable[cursorIndex] = mContext.getResources().getDrawable(mCursorDrawableRes);
5069
5070        if (mTempRect == null) mTempRect = new Rect();
5071
5072        mCursorDrawable[cursorIndex].getPadding(mTempRect);
5073        final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth();
5074        horizontal = Math.max(0.5f, horizontal - 0.5f);
5075        final int left = (int) (horizontal) - mTempRect.left;
5076        mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width,
5077                bottom + mTempRect.bottom);
5078    }
5079
5080    private void drawCursor(Canvas canvas, int cursorOffsetVertical) {
5081        final boolean translate = cursorOffsetVertical != 0;
5082        if (translate) canvas.translate(0, cursorOffsetVertical);
5083        for (int i = 0; i < mCursorCount; i++) {
5084            mCursorDrawable[i].draw(canvas);
5085        }
5086        if (translate) canvas.translate(0, -cursorOffsetVertical);
5087    }
5088
5089    @Override
5090    public void getFocusedRect(Rect r) {
5091        if (mLayout == null) {
5092            super.getFocusedRect(r);
5093            return;
5094        }
5095
5096        int selEnd = getSelectionEnd();
5097        if (selEnd < 0) {
5098            super.getFocusedRect(r);
5099            return;
5100        }
5101
5102        int selStart = getSelectionStart();
5103        if (selStart < 0 || selStart >= selEnd) {
5104            int line = mLayout.getLineForOffset(selEnd);
5105            r.top = mLayout.getLineTop(line);
5106            r.bottom = mLayout.getLineBottom(line);
5107            r.left = (int) mLayout.getPrimaryHorizontal(selEnd) - 2;
5108            r.right = r.left + 4;
5109        } else {
5110            int lineStart = mLayout.getLineForOffset(selStart);
5111            int lineEnd = mLayout.getLineForOffset(selEnd);
5112            r.top = mLayout.getLineTop(lineStart);
5113            r.bottom = mLayout.getLineBottom(lineEnd);
5114            if (lineStart == lineEnd) {
5115                r.left = (int) mLayout.getPrimaryHorizontal(selStart);
5116                r.right = (int) mLayout.getPrimaryHorizontal(selEnd);
5117            } else {
5118                // Selection extends across multiple lines -- the focused
5119                // rect covers the entire width.
5120                if (mHighlightPath == null) mHighlightPath = new Path();
5121                if (mHighlightPathBogus) {
5122                    mHighlightPath.reset();
5123                    mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
5124                    mHighlightPathBogus = false;
5125                }
5126                synchronized (sTempRect) {
5127                    mHighlightPath.computeBounds(sTempRect, true);
5128                    r.left = (int)sTempRect.left-1;
5129                    r.right = (int)sTempRect.right+1;
5130                }
5131            }
5132        }
5133
5134        // Adjust for padding and gravity.
5135        int paddingLeft = getCompoundPaddingLeft();
5136        int paddingTop = getExtendedPaddingTop();
5137        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5138            paddingTop += getVerticalOffset(false);
5139        }
5140        r.offset(paddingLeft, paddingTop);
5141    }
5142
5143    /**
5144     * Return the number of lines of text, or 0 if the internal Layout has not
5145     * been built.
5146     */
5147    public int getLineCount() {
5148        return mLayout != null ? mLayout.getLineCount() : 0;
5149    }
5150
5151    /**
5152     * Return the baseline for the specified line (0...getLineCount() - 1)
5153     * If bounds is not null, return the top, left, right, bottom extents
5154     * of the specified line in it. If the internal Layout has not been built,
5155     * return 0 and set bounds to (0, 0, 0, 0)
5156     * @param line which line to examine (0..getLineCount() - 1)
5157     * @param bounds Optional. If not null, it returns the extent of the line
5158     * @return the Y-coordinate of the baseline
5159     */
5160    public int getLineBounds(int line, Rect bounds) {
5161        if (mLayout == null) {
5162            if (bounds != null) {
5163                bounds.set(0, 0, 0, 0);
5164            }
5165            return 0;
5166        }
5167        else {
5168            int baseline = mLayout.getLineBounds(line, bounds);
5169
5170            int voffset = getExtendedPaddingTop();
5171            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5172                voffset += getVerticalOffset(true);
5173            }
5174            if (bounds != null) {
5175                bounds.offset(getCompoundPaddingLeft(), voffset);
5176            }
5177            return baseline + voffset;
5178        }
5179    }
5180
5181    @Override
5182    public int getBaseline() {
5183        if (mLayout == null) {
5184            return super.getBaseline();
5185        }
5186
5187        int voffset = 0;
5188        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5189            voffset = getVerticalOffset(true);
5190        }
5191
5192        return getExtendedPaddingTop() + voffset + mLayout.getLineBaseline(0);
5193    }
5194
5195    /**
5196     * @hide
5197     * @param offsetRequired
5198     */
5199    @Override
5200    protected int getFadeTop(boolean offsetRequired) {
5201        if (mLayout == null) return 0;
5202
5203        int voffset = 0;
5204        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5205            voffset = getVerticalOffset(true);
5206        }
5207
5208        if (offsetRequired) voffset += getTopPaddingOffset();
5209
5210        return getExtendedPaddingTop() + voffset;
5211    }
5212
5213    /**
5214     * @hide
5215     * @param offsetRequired
5216     */
5217    @Override
5218    protected int getFadeHeight(boolean offsetRequired) {
5219        return mLayout != null ? mLayout.getHeight() : 0;
5220    }
5221
5222    @Override
5223    public boolean onKeyPreIme(int keyCode, KeyEvent event) {
5224        if (keyCode == KeyEvent.KEYCODE_BACK) {
5225            boolean isInSelectionMode = mSelectionActionMode != null;
5226
5227            if (isInSelectionMode) {
5228                if (event.getAction() == KeyEvent.ACTION_DOWN && event.getRepeatCount() == 0) {
5229                    KeyEvent.DispatcherState state = getKeyDispatcherState();
5230                    if (state != null) {
5231                        state.startTracking(event, this);
5232                    }
5233                    return true;
5234                } else if (event.getAction() == KeyEvent.ACTION_UP) {
5235                    KeyEvent.DispatcherState state = getKeyDispatcherState();
5236                    if (state != null) {
5237                        state.handleUpEvent(event);
5238                    }
5239                    if (event.isTracking() && !event.isCanceled()) {
5240                        if (isInSelectionMode) {
5241                            stopSelectionActionMode();
5242                            return true;
5243                        }
5244                    }
5245                }
5246            }
5247        }
5248        return super.onKeyPreIme(keyCode, event);
5249    }
5250
5251    @Override
5252    public boolean onKeyDown(int keyCode, KeyEvent event) {
5253        int which = doKeyDown(keyCode, event, null);
5254        if (which == 0) {
5255            // Go through default dispatching.
5256            return super.onKeyDown(keyCode, event);
5257        }
5258
5259        return true;
5260    }
5261
5262    @Override
5263    public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) {
5264        KeyEvent down = KeyEvent.changeAction(event, KeyEvent.ACTION_DOWN);
5265
5266        int which = doKeyDown(keyCode, down, event);
5267        if (which == 0) {
5268            // Go through default dispatching.
5269            return super.onKeyMultiple(keyCode, repeatCount, event);
5270        }
5271        if (which == -1) {
5272            // Consumed the whole thing.
5273            return true;
5274        }
5275
5276        repeatCount--;
5277
5278        // We are going to dispatch the remaining events to either the input
5279        // or movement method.  To do this, we will just send a repeated stream
5280        // of down and up events until we have done the complete repeatCount.
5281        // It would be nice if those interfaces had an onKeyMultiple() method,
5282        // but adding that is a more complicated change.
5283        KeyEvent up = KeyEvent.changeAction(event, KeyEvent.ACTION_UP);
5284        if (which == 1) {
5285            mInput.onKeyUp(this, (Editable)mText, keyCode, up);
5286            while (--repeatCount > 0) {
5287                mInput.onKeyDown(this, (Editable)mText, keyCode, down);
5288                mInput.onKeyUp(this, (Editable)mText, keyCode, up);
5289            }
5290            hideErrorIfUnchanged();
5291
5292        } else if (which == 2) {
5293            mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
5294            while (--repeatCount > 0) {
5295                mMovement.onKeyDown(this, (Spannable)mText, keyCode, down);
5296                mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
5297            }
5298        }
5299
5300        return true;
5301    }
5302
5303    /**
5304     * Returns true if pressing ENTER in this field advances focus instead
5305     * of inserting the character.  This is true mostly in single-line fields,
5306     * but also in mail addresses and subjects which will display on multiple
5307     * lines but where it doesn't make sense to insert newlines.
5308     */
5309    private boolean shouldAdvanceFocusOnEnter() {
5310        if (mInput == null) {
5311            return false;
5312        }
5313
5314        if (mSingleLine) {
5315            return true;
5316        }
5317
5318        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
5319            int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
5320            if (variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_ADDRESS
5321                    || variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT) {
5322                return true;
5323            }
5324        }
5325
5326        return false;
5327    }
5328
5329    /**
5330     * Returns true if pressing TAB in this field advances focus instead
5331     * of inserting the character.  Insert tabs only in multi-line editors.
5332     */
5333    private boolean shouldAdvanceFocusOnTab() {
5334        if (mInput != null && !mSingleLine) {
5335            if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
5336                int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
5337                if (variation == EditorInfo.TYPE_TEXT_FLAG_IME_MULTI_LINE
5338                        || variation == EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE) {
5339                    return false;
5340                }
5341            }
5342        }
5343        return true;
5344    }
5345
5346    private int doKeyDown(int keyCode, KeyEvent event, KeyEvent otherEvent) {
5347        if (!isEnabled()) {
5348            return 0;
5349        }
5350
5351        switch (keyCode) {
5352            case KeyEvent.KEYCODE_ENTER:
5353                if (event.hasNoModifiers()) {
5354                    // When mInputContentType is set, we know that we are
5355                    // running in a "modern" cupcake environment, so don't need
5356                    // to worry about the application trying to capture
5357                    // enter key events.
5358                    if (mInputContentType != null) {
5359                        // If there is an action listener, given them a
5360                        // chance to consume the event.
5361                        if (mInputContentType.onEditorActionListener != null &&
5362                                mInputContentType.onEditorActionListener.onEditorAction(
5363                                this, EditorInfo.IME_NULL, event)) {
5364                            mInputContentType.enterDown = true;
5365                            // We are consuming the enter key for them.
5366                            return -1;
5367                        }
5368                    }
5369
5370                    // If our editor should move focus when enter is pressed, or
5371                    // this is a generated event from an IME action button, then
5372                    // don't let it be inserted into the text.
5373                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
5374                            || shouldAdvanceFocusOnEnter()) {
5375                        if (hasOnClickListeners()) {
5376                            return 0;
5377                        }
5378                        return -1;
5379                    }
5380                }
5381                break;
5382
5383            case KeyEvent.KEYCODE_DPAD_CENTER:
5384                if (event.hasNoModifiers()) {
5385                    if (shouldAdvanceFocusOnEnter()) {
5386                        return 0;
5387                    }
5388                }
5389                break;
5390
5391            case KeyEvent.KEYCODE_TAB:
5392                if (event.hasNoModifiers() || event.hasModifiers(KeyEvent.META_SHIFT_ON)) {
5393                    if (shouldAdvanceFocusOnTab()) {
5394                        return 0;
5395                    }
5396                }
5397                break;
5398
5399                // Has to be done on key down (and not on key up) to correctly be intercepted.
5400            case KeyEvent.KEYCODE_BACK:
5401                if (mSelectionActionMode != null) {
5402                    stopSelectionActionMode();
5403                    return -1;
5404                }
5405                break;
5406        }
5407
5408        if (mInput != null) {
5409            resetErrorChangedFlag();
5410
5411            boolean doDown = true;
5412            if (otherEvent != null) {
5413                try {
5414                    beginBatchEdit();
5415                    final boolean handled = mInput.onKeyOther(this, (Editable) mText, otherEvent);
5416                    hideErrorIfUnchanged();
5417                    doDown = false;
5418                    if (handled) {
5419                        return -1;
5420                    }
5421                } catch (AbstractMethodError e) {
5422                    // onKeyOther was added after 1.0, so if it isn't
5423                    // implemented we need to try to dispatch as a regular down.
5424                } finally {
5425                    endBatchEdit();
5426                }
5427            }
5428
5429            if (doDown) {
5430                beginBatchEdit();
5431                final boolean handled = mInput.onKeyDown(this, (Editable) mText, keyCode, event);
5432                endBatchEdit();
5433                hideErrorIfUnchanged();
5434                if (handled) return 1;
5435            }
5436        }
5437
5438        // bug 650865: sometimes we get a key event before a layout.
5439        // don't try to move around if we don't know the layout.
5440
5441        if (mMovement != null && mLayout != null) {
5442            boolean doDown = true;
5443            if (otherEvent != null) {
5444                try {
5445                    boolean handled = mMovement.onKeyOther(this, (Spannable) mText,
5446                            otherEvent);
5447                    doDown = false;
5448                    if (handled) {
5449                        return -1;
5450                    }
5451                } catch (AbstractMethodError e) {
5452                    // onKeyOther was added after 1.0, so if it isn't
5453                    // implemented we need to try to dispatch as a regular down.
5454                }
5455            }
5456            if (doDown) {
5457                if (mMovement.onKeyDown(this, (Spannable)mText, keyCode, event))
5458                    return 2;
5459            }
5460        }
5461
5462        return 0;
5463    }
5464
5465    /**
5466     * Resets the mErrorWasChanged flag, so that future calls to {@link #setError(CharSequence)}
5467     * can be recorded.
5468     * @hide
5469     */
5470    public void resetErrorChangedFlag() {
5471        /*
5472         * Keep track of what the error was before doing the input
5473         * so that if an input filter changed the error, we leave
5474         * that error showing.  Otherwise, we take down whatever
5475         * error was showing when the user types something.
5476         */
5477        mErrorWasChanged = false;
5478    }
5479
5480    /**
5481     * @hide
5482     */
5483    public void hideErrorIfUnchanged() {
5484        if (mError != null && !mErrorWasChanged) {
5485            setError(null, null);
5486        }
5487    }
5488
5489    @Override
5490    public boolean onKeyUp(int keyCode, KeyEvent event) {
5491        if (!isEnabled()) {
5492            return super.onKeyUp(keyCode, event);
5493        }
5494
5495        switch (keyCode) {
5496            case KeyEvent.KEYCODE_DPAD_CENTER:
5497                if (event.hasNoModifiers()) {
5498                    /*
5499                     * If there is a click listener, just call through to
5500                     * super, which will invoke it.
5501                     *
5502                     * If there isn't a click listener, try to show the soft
5503                     * input method.  (It will also
5504                     * call performClick(), but that won't do anything in
5505                     * this case.)
5506                     */
5507                    if (hasOnClickListeners()) {
5508                        if (mMovement != null && mText instanceof Editable
5509                                && mLayout != null && onCheckIsTextEditor()) {
5510                            InputMethodManager imm = InputMethodManager.peekInstance();
5511                            viewClicked(imm);
5512                            if (imm != null && mSoftInputShownOnFocus) {
5513                                imm.showSoftInput(this, 0);
5514                            }
5515                        }
5516                    }
5517                }
5518                return super.onKeyUp(keyCode, event);
5519
5520            case KeyEvent.KEYCODE_ENTER:
5521                if (event.hasNoModifiers()) {
5522                    if (mInputContentType != null
5523                            && mInputContentType.onEditorActionListener != null
5524                            && mInputContentType.enterDown) {
5525                        mInputContentType.enterDown = false;
5526                        if (mInputContentType.onEditorActionListener.onEditorAction(
5527                                this, EditorInfo.IME_NULL, event)) {
5528                            return true;
5529                        }
5530                    }
5531
5532                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
5533                            || shouldAdvanceFocusOnEnter()) {
5534                        /*
5535                         * If there is a click listener, just call through to
5536                         * super, which will invoke it.
5537                         *
5538                         * If there isn't a click listener, try to advance focus,
5539                         * but still call through to super, which will reset the
5540                         * pressed state and longpress state.  (It will also
5541                         * call performClick(), but that won't do anything in
5542                         * this case.)
5543                         */
5544                        if (hasOnClickListeners()) {
5545                            View v = focusSearch(FOCUS_DOWN);
5546
5547                            if (v != null) {
5548                                if (!v.requestFocus(FOCUS_DOWN)) {
5549                                    throw new IllegalStateException(
5550                                            "focus search returned a view " +
5551                                            "that wasn't able to take focus!");
5552                                }
5553
5554                                /*
5555                                 * Return true because we handled the key; super
5556                                 * will return false because there was no click
5557                                 * listener.
5558                                 */
5559                                super.onKeyUp(keyCode, event);
5560                                return true;
5561                            } else if ((event.getFlags()
5562                                    & KeyEvent.FLAG_EDITOR_ACTION) != 0) {
5563                                // No target for next focus, but make sure the IME
5564                                // if this came from it.
5565                                InputMethodManager imm = InputMethodManager.peekInstance();
5566                                if (imm != null && imm.isActive(this)) {
5567                                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
5568                                }
5569                            }
5570                        }
5571                    }
5572                    return super.onKeyUp(keyCode, event);
5573                }
5574                break;
5575        }
5576
5577        if (mInput != null)
5578            if (mInput.onKeyUp(this, (Editable) mText, keyCode, event))
5579                return true;
5580
5581        if (mMovement != null && mLayout != null)
5582            if (mMovement.onKeyUp(this, (Spannable) mText, keyCode, event))
5583                return true;
5584
5585        return super.onKeyUp(keyCode, event);
5586    }
5587
5588    @Override public boolean onCheckIsTextEditor() {
5589        return mInputType != EditorInfo.TYPE_NULL;
5590    }
5591
5592    @Override public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
5593        if (onCheckIsTextEditor() && isEnabled()) {
5594            if (mInputMethodState == null) {
5595                mInputMethodState = new InputMethodState();
5596            }
5597            outAttrs.inputType = mInputType;
5598            if (mInputContentType != null) {
5599                outAttrs.imeOptions = mInputContentType.imeOptions;
5600                outAttrs.privateImeOptions = mInputContentType.privateImeOptions;
5601                outAttrs.actionLabel = mInputContentType.imeActionLabel;
5602                outAttrs.actionId = mInputContentType.imeActionId;
5603                outAttrs.extras = mInputContentType.extras;
5604            } else {
5605                outAttrs.imeOptions = EditorInfo.IME_NULL;
5606                // May not be defined otherwise and needed by onEditorAction
5607                mInputContentType = new InputContentType();
5608            }
5609            if (focusSearch(FOCUS_DOWN) != null) {
5610                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_NEXT;
5611            }
5612            if (focusSearch(FOCUS_UP) != null) {
5613                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_PREVIOUS;
5614            }
5615            if ((outAttrs.imeOptions&EditorInfo.IME_MASK_ACTION)
5616                    == EditorInfo.IME_ACTION_UNSPECIFIED) {
5617                if ((outAttrs.imeOptions&EditorInfo.IME_FLAG_NAVIGATE_NEXT) != 0) {
5618                    // An action has not been set, but the enter key will move to
5619                    // the next focus, so set the action to that.
5620                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_NEXT;
5621                } else {
5622                    // An action has not been set, and there is no focus to move
5623                    // to, so let's just supply a "done" action.
5624                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_DONE;
5625                }
5626                if (!shouldAdvanceFocusOnEnter()) {
5627                    outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5628                }
5629            }
5630            if (isMultilineInputType(outAttrs.inputType)) {
5631                // Multi-line text editors should always show an enter key.
5632                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5633            }
5634            outAttrs.hintText = mHint;
5635            if (mText instanceof Editable) {
5636                InputConnection ic = new EditableInputConnection(this);
5637                outAttrs.initialSelStart = getSelectionStart();
5638                outAttrs.initialSelEnd = getSelectionEnd();
5639                outAttrs.initialCapsMode = ic.getCursorCapsMode(mInputType);
5640                return ic;
5641            }
5642        }
5643        return null;
5644    }
5645
5646    /**
5647     * If this TextView contains editable content, extract a portion of it
5648     * based on the information in <var>request</var> in to <var>outText</var>.
5649     * @return Returns true if the text was successfully extracted, else false.
5650     */
5651    public boolean extractText(ExtractedTextRequest request,
5652            ExtractedText outText) {
5653        return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN,
5654                EXTRACT_UNKNOWN, outText);
5655    }
5656
5657    static final int EXTRACT_NOTHING = -2;
5658    static final int EXTRACT_UNKNOWN = -1;
5659
5660    boolean extractTextInternal(ExtractedTextRequest request,
5661            int partialStartOffset, int partialEndOffset, int delta,
5662            ExtractedText outText) {
5663        final CharSequence content = mText;
5664        if (content != null) {
5665            if (partialStartOffset != EXTRACT_NOTHING) {
5666                final int N = content.length();
5667                if (partialStartOffset < 0) {
5668                    outText.partialStartOffset = outText.partialEndOffset = -1;
5669                    partialStartOffset = 0;
5670                    partialEndOffset = N;
5671                } else {
5672                    // Now use the delta to determine the actual amount of text
5673                    // we need.
5674                    partialEndOffset += delta;
5675                    // Adjust offsets to ensure we contain full spans.
5676                    if (content instanceof Spanned) {
5677                        Spanned spanned = (Spanned)content;
5678                        Object[] spans = spanned.getSpans(partialStartOffset,
5679                                partialEndOffset, ParcelableSpan.class);
5680                        int i = spans.length;
5681                        while (i > 0) {
5682                            i--;
5683                            int j = spanned.getSpanStart(spans[i]);
5684                            if (j < partialStartOffset) partialStartOffset = j;
5685                            j = spanned.getSpanEnd(spans[i]);
5686                            if (j > partialEndOffset) partialEndOffset = j;
5687                        }
5688                    }
5689                    outText.partialStartOffset = partialStartOffset;
5690                    outText.partialEndOffset = partialEndOffset - delta;
5691
5692                    if (partialStartOffset > N) {
5693                        partialStartOffset = N;
5694                    } else if (partialStartOffset < 0) {
5695                        partialStartOffset = 0;
5696                    }
5697                    if (partialEndOffset > N) {
5698                        partialEndOffset = N;
5699                    } else if (partialEndOffset < 0) {
5700                        partialEndOffset = 0;
5701                    }
5702                }
5703                if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) {
5704                    outText.text = content.subSequence(partialStartOffset,
5705                            partialEndOffset);
5706                } else {
5707                    outText.text = TextUtils.substring(content, partialStartOffset,
5708                            partialEndOffset);
5709                }
5710            } else {
5711                outText.partialStartOffset = 0;
5712                outText.partialEndOffset = 0;
5713                outText.text = "";
5714            }
5715            outText.flags = 0;
5716            if (MetaKeyKeyListener.getMetaState(mText, MetaKeyKeyListener.META_SELECTING) != 0) {
5717                outText.flags |= ExtractedText.FLAG_SELECTING;
5718            }
5719            if (mSingleLine) {
5720                outText.flags |= ExtractedText.FLAG_SINGLE_LINE;
5721            }
5722            outText.startOffset = 0;
5723            outText.selectionStart = getSelectionStart();
5724            outText.selectionEnd = getSelectionEnd();
5725            return true;
5726        }
5727        return false;
5728    }
5729
5730    boolean reportExtractedText() {
5731        final InputMethodState ims = mInputMethodState;
5732        if (ims != null) {
5733            final boolean contentChanged = ims.mContentChanged;
5734            if (contentChanged || ims.mSelectionModeChanged) {
5735                ims.mContentChanged = false;
5736                ims.mSelectionModeChanged = false;
5737                final ExtractedTextRequest req = mInputMethodState.mExtracting;
5738                if (req != null) {
5739                    InputMethodManager imm = InputMethodManager.peekInstance();
5740                    if (imm != null) {
5741                        if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Retrieving extracted start="
5742                                + ims.mChangedStart + " end=" + ims.mChangedEnd
5743                                + " delta=" + ims.mChangedDelta);
5744                        if (ims.mChangedStart < 0 && !contentChanged) {
5745                            ims.mChangedStart = EXTRACT_NOTHING;
5746                        }
5747                        if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd,
5748                                ims.mChangedDelta, ims.mTmpExtracted)) {
5749                            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Reporting extracted start="
5750                                    + ims.mTmpExtracted.partialStartOffset
5751                                    + " end=" + ims.mTmpExtracted.partialEndOffset
5752                                    + ": " + ims.mTmpExtracted.text);
5753                            imm.updateExtractedText(this, req.token,
5754                                    mInputMethodState.mTmpExtracted);
5755                            ims.mChangedStart = EXTRACT_UNKNOWN;
5756                            ims.mChangedEnd = EXTRACT_UNKNOWN;
5757                            ims.mChangedDelta = 0;
5758                            ims.mContentChanged = false;
5759                            return true;
5760                        }
5761                    }
5762                }
5763            }
5764        }
5765        return false;
5766    }
5767
5768    /**
5769     * This is used to remove all style-impacting spans from text before new
5770     * extracted text is being replaced into it, so that we don't have any
5771     * lingering spans applied during the replace.
5772     */
5773    static void removeParcelableSpans(Spannable spannable, int start, int end) {
5774        Object[] spans = spannable.getSpans(start, end, ParcelableSpan.class);
5775        int i = spans.length;
5776        while (i > 0) {
5777            i--;
5778            spannable.removeSpan(spans[i]);
5779        }
5780    }
5781
5782    /**
5783     * Apply to this text view the given extracted text, as previously
5784     * returned by {@link #extractText(ExtractedTextRequest, ExtractedText)}.
5785     */
5786    public void setExtractedText(ExtractedText text) {
5787        Editable content = getEditableText();
5788        if (text.text != null) {
5789            if (content == null) {
5790                setText(text.text, TextView.BufferType.EDITABLE);
5791            } else if (text.partialStartOffset < 0) {
5792                removeParcelableSpans(content, 0, content.length());
5793                content.replace(0, content.length(), text.text);
5794            } else {
5795                final int N = content.length();
5796                int start = text.partialStartOffset;
5797                if (start > N) start = N;
5798                int end = text.partialEndOffset;
5799                if (end > N) end = N;
5800                removeParcelableSpans(content, start, end);
5801                content.replace(start, end, text.text);
5802            }
5803        }
5804
5805        // Now set the selection position...  make sure it is in range, to
5806        // avoid crashes.  If this is a partial update, it is possible that
5807        // the underlying text may have changed, causing us problems here.
5808        // Also we just don't want to trust clients to do the right thing.
5809        Spannable sp = (Spannable)getText();
5810        final int N = sp.length();
5811        int start = text.selectionStart;
5812        if (start < 0) start = 0;
5813        else if (start > N) start = N;
5814        int end = text.selectionEnd;
5815        if (end < 0) end = 0;
5816        else if (end > N) end = N;
5817        Selection.setSelection(sp, start, end);
5818
5819        // Finally, update the selection mode.
5820        if ((text.flags&ExtractedText.FLAG_SELECTING) != 0) {
5821            MetaKeyKeyListener.startSelecting(this, sp);
5822        } else {
5823            MetaKeyKeyListener.stopSelecting(this, sp);
5824        }
5825    }
5826
5827    /**
5828     * @hide
5829     */
5830    public void setExtracting(ExtractedTextRequest req) {
5831        if (mInputMethodState != null) {
5832            mInputMethodState.mExtracting = req;
5833        }
5834        // This would stop a possible selection mode, but no such mode is started in case
5835        // extracted mode will start. Some text is selected though, and will trigger an action mode
5836        // in the extracted view.
5837        hideControllers();
5838    }
5839
5840    /**
5841     * Called by the framework in response to a text completion from
5842     * the current input method, provided by it calling
5843     * {@link InputConnection#commitCompletion
5844     * InputConnection.commitCompletion()}.  The default implementation does
5845     * nothing; text views that are supporting auto-completion should override
5846     * this to do their desired behavior.
5847     *
5848     * @param text The auto complete text the user has selected.
5849     */
5850    public void onCommitCompletion(CompletionInfo text) {
5851        // intentionally empty
5852    }
5853
5854    /**
5855     * Called by the framework in response to a text auto-correction (such as fixing a typo using a
5856     * a dictionnary) from the current input method, provided by it calling
5857     * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default
5858     * implementation flashes the background of the corrected word to provide feedback to the user.
5859     *
5860     * @param info The auto correct info about the text that was corrected.
5861     */
5862    public void onCommitCorrection(CorrectionInfo info) {
5863        if (mCorrectionHighlighter == null) {
5864            mCorrectionHighlighter = new CorrectionHighlighter();
5865        } else {
5866            mCorrectionHighlighter.invalidate(false);
5867        }
5868
5869        mCorrectionHighlighter.highlight(info);
5870    }
5871
5872    private class CorrectionHighlighter {
5873        private final Path mPath = new Path();
5874        private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
5875        private int mStart, mEnd;
5876        private long mFadingStartTime;
5877        private final static int FADE_OUT_DURATION = 400;
5878
5879        public CorrectionHighlighter() {
5880            mPaint.setCompatibilityScaling(getResources().getCompatibilityInfo().applicationScale);
5881            mPaint.setStyle(Paint.Style.FILL);
5882        }
5883
5884        public void highlight(CorrectionInfo info) {
5885            mStart = info.getOffset();
5886            mEnd = mStart + info.getNewText().length();
5887            mFadingStartTime = SystemClock.uptimeMillis();
5888
5889            if (mStart < 0 || mEnd < 0) {
5890                stopAnimation();
5891            }
5892        }
5893
5894        public void draw(Canvas canvas, int cursorOffsetVertical) {
5895            if (updatePath() && updatePaint()) {
5896                if (cursorOffsetVertical != 0) {
5897                    canvas.translate(0, cursorOffsetVertical);
5898                }
5899
5900                canvas.drawPath(mPath, mPaint);
5901
5902                if (cursorOffsetVertical != 0) {
5903                    canvas.translate(0, -cursorOffsetVertical);
5904                }
5905                invalidate(true); // TODO invalidate cursor region only
5906            } else {
5907                stopAnimation();
5908                invalidate(false); // TODO invalidate cursor region only
5909            }
5910        }
5911
5912        private boolean updatePaint() {
5913            final long duration = SystemClock.uptimeMillis() - mFadingStartTime;
5914            if (duration > FADE_OUT_DURATION) return false;
5915
5916            final float coef = 1.0f - (float) duration / FADE_OUT_DURATION;
5917            final int highlightColorAlpha = Color.alpha(mHighlightColor);
5918            final int color = (mHighlightColor & 0x00FFFFFF) +
5919                    ((int) (highlightColorAlpha * coef) << 24);
5920            mPaint.setColor(color);
5921            return true;
5922        }
5923
5924        private boolean updatePath() {
5925            final Layout layout = TextView.this.mLayout;
5926            if (layout == null) return false;
5927
5928            // Update in case text is edited while the animation is run
5929            final int length = mText.length();
5930            int start = Math.min(length, mStart);
5931            int end = Math.min(length, mEnd);
5932
5933            mPath.reset();
5934            TextView.this.mLayout.getSelectionPath(start, end, mPath);
5935            return true;
5936        }
5937
5938        private void invalidate(boolean delayed) {
5939            if (TextView.this.mLayout == null) return;
5940
5941            synchronized (sTempRect) {
5942                mPath.computeBounds(sTempRect, false);
5943
5944                int left = getCompoundPaddingLeft();
5945                int top = getExtendedPaddingTop() + getVerticalOffset(true);
5946
5947                if (delayed) {
5948                    TextView.this.postInvalidateDelayed(16, // 60 Hz update
5949                            left + (int) sTempRect.left, top + (int) sTempRect.top,
5950                            left + (int) sTempRect.right, top + (int) sTempRect.bottom);
5951                } else {
5952                    TextView.this.postInvalidate((int) sTempRect.left, (int) sTempRect.top,
5953                            (int) sTempRect.right, (int) sTempRect.bottom);
5954                }
5955            }
5956        }
5957
5958        private void stopAnimation() {
5959            TextView.this.mCorrectionHighlighter = null;
5960        }
5961    }
5962
5963    public void beginBatchEdit() {
5964        mInBatchEditControllers = true;
5965        final InputMethodState ims = mInputMethodState;
5966        if (ims != null) {
5967            int nesting = ++ims.mBatchEditNesting;
5968            if (nesting == 1) {
5969                ims.mCursorChanged = false;
5970                ims.mChangedDelta = 0;
5971                if (ims.mContentChanged) {
5972                    // We already have a pending change from somewhere else,
5973                    // so turn this into a full update.
5974                    ims.mChangedStart = 0;
5975                    ims.mChangedEnd = mText.length();
5976                } else {
5977                    ims.mChangedStart = EXTRACT_UNKNOWN;
5978                    ims.mChangedEnd = EXTRACT_UNKNOWN;
5979                    ims.mContentChanged = false;
5980                }
5981                onBeginBatchEdit();
5982            }
5983        }
5984    }
5985
5986    public void endBatchEdit() {
5987        mInBatchEditControllers = false;
5988        final InputMethodState ims = mInputMethodState;
5989        if (ims != null) {
5990            int nesting = --ims.mBatchEditNesting;
5991            if (nesting == 0) {
5992                finishBatchEdit(ims);
5993            }
5994        }
5995    }
5996
5997    void ensureEndedBatchEdit() {
5998        final InputMethodState ims = mInputMethodState;
5999        if (ims != null && ims.mBatchEditNesting != 0) {
6000            ims.mBatchEditNesting = 0;
6001            finishBatchEdit(ims);
6002        }
6003    }
6004
6005    void finishBatchEdit(final InputMethodState ims) {
6006        onEndBatchEdit();
6007
6008        if (ims.mContentChanged || ims.mSelectionModeChanged) {
6009            updateAfterEdit();
6010            reportExtractedText();
6011        } else if (ims.mCursorChanged) {
6012            // Cheezy way to get us to report the current cursor location.
6013            invalidateCursor();
6014        }
6015    }
6016
6017    void updateAfterEdit() {
6018        invalidate();
6019        int curs = getSelectionStart();
6020
6021        if (curs >= 0 || (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6022            registerForPreDraw();
6023        }
6024
6025        if (curs >= 0) {
6026            mHighlightPathBogus = true;
6027            makeBlink();
6028            bringPointIntoView(curs);
6029        }
6030
6031        checkForResize();
6032    }
6033
6034    /**
6035     * Called by the framework in response to a request to begin a batch
6036     * of edit operations through a call to link {@link #beginBatchEdit()}.
6037     */
6038    public void onBeginBatchEdit() {
6039        // intentionally empty
6040    }
6041
6042    /**
6043     * Called by the framework in response to a request to end a batch
6044     * of edit operations through a call to link {@link #endBatchEdit}.
6045     */
6046    public void onEndBatchEdit() {
6047        // intentionally empty
6048    }
6049
6050    /**
6051     * Called by the framework in response to a private command from the
6052     * current method, provided by it calling
6053     * {@link InputConnection#performPrivateCommand
6054     * InputConnection.performPrivateCommand()}.
6055     *
6056     * @param action The action name of the command.
6057     * @param data Any additional data for the command.  This may be null.
6058     * @return Return true if you handled the command, else false.
6059     */
6060    public boolean onPrivateIMECommand(String action, Bundle data) {
6061        return false;
6062    }
6063
6064    private void nullLayouts() {
6065        if (mLayout instanceof BoringLayout && mSavedLayout == null) {
6066            mSavedLayout = (BoringLayout) mLayout;
6067        }
6068        if (mHintLayout instanceof BoringLayout && mSavedHintLayout == null) {
6069            mSavedHintLayout = (BoringLayout) mHintLayout;
6070        }
6071
6072        mSavedMarqueeModeLayout = mLayout = mHintLayout = null;
6073
6074        // Since it depends on the value of mLayout
6075        prepareCursorControllers();
6076    }
6077
6078    /**
6079     * Make a new Layout based on the already-measured size of the view,
6080     * on the assumption that it was measured correctly at some point.
6081     */
6082    private void assumeLayout() {
6083        int width = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6084
6085        if (width < 1) {
6086            width = 0;
6087        }
6088
6089        int physicalWidth = width;
6090
6091        if (mHorizontallyScrolling) {
6092            width = VERY_WIDE;
6093        }
6094
6095        makeNewLayout(width, physicalWidth, UNKNOWN_BORING, UNKNOWN_BORING,
6096                      physicalWidth, false);
6097    }
6098
6099    @Override
6100    protected void resetResolvedLayoutDirection() {
6101        super.resetResolvedLayoutDirection();
6102
6103        if (mLayoutAlignment != null &&
6104                (mTextAlign == TextAlign.VIEW_START ||
6105                mTextAlign == TextAlign.VIEW_END)) {
6106            mLayoutAlignment = null;
6107        }
6108    }
6109
6110    private Layout.Alignment getLayoutAlignment() {
6111        if (mLayoutAlignment == null) {
6112            Layout.Alignment alignment;
6113            TextAlign textAlign = mTextAlign;
6114            switch (textAlign) {
6115                case INHERIT:
6116                    // fall through to gravity temporarily
6117                    // intention is to inherit value through view hierarchy.
6118                case GRAVITY:
6119                    switch (mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) {
6120                        case Gravity.START:
6121                            alignment = Layout.Alignment.ALIGN_NORMAL;
6122                            break;
6123                        case Gravity.END:
6124                            alignment = Layout.Alignment.ALIGN_OPPOSITE;
6125                            break;
6126                        case Gravity.LEFT:
6127                            alignment = Layout.Alignment.ALIGN_LEFT;
6128                            break;
6129                        case Gravity.RIGHT:
6130                            alignment = Layout.Alignment.ALIGN_RIGHT;
6131                            break;
6132                        case Gravity.CENTER_HORIZONTAL:
6133                            alignment = Layout.Alignment.ALIGN_CENTER;
6134                            break;
6135                        default:
6136                            alignment = Layout.Alignment.ALIGN_NORMAL;
6137                            break;
6138                    }
6139                    break;
6140                case TEXT_START:
6141                    alignment = Layout.Alignment.ALIGN_NORMAL;
6142                    break;
6143                case TEXT_END:
6144                    alignment = Layout.Alignment.ALIGN_OPPOSITE;
6145                    break;
6146                case CENTER:
6147                    alignment = Layout.Alignment.ALIGN_CENTER;
6148                    break;
6149                case VIEW_START:
6150                    alignment = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
6151                            Layout.Alignment.ALIGN_RIGHT : Layout.Alignment.ALIGN_LEFT;
6152                    break;
6153                case VIEW_END:
6154                    alignment = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
6155                            Layout.Alignment.ALIGN_LEFT : Layout.Alignment.ALIGN_RIGHT;
6156                    break;
6157                default:
6158                    alignment = Layout.Alignment.ALIGN_NORMAL;
6159                    break;
6160            }
6161            mLayoutAlignment = alignment;
6162        }
6163        return mLayoutAlignment;
6164    }
6165
6166    /**
6167     * The width passed in is now the desired layout width,
6168     * not the full view width with padding.
6169     * {@hide}
6170     */
6171    protected void makeNewLayout(int wantWidth, int hintWidth,
6172                                 BoringLayout.Metrics boring,
6173                                 BoringLayout.Metrics hintBoring,
6174                                 int ellipsisWidth, boolean bringIntoView) {
6175        stopMarquee();
6176
6177        // Update "old" cached values
6178        mOldMaximum = mMaximum;
6179        mOldMaxMode = mMaxMode;
6180
6181        mHighlightPathBogus = true;
6182
6183        if (wantWidth < 0) {
6184            wantWidth = 0;
6185        }
6186        if (hintWidth < 0) {
6187            hintWidth = 0;
6188        }
6189
6190        Layout.Alignment alignment = getLayoutAlignment();
6191        boolean shouldEllipsize = mEllipsize != null && mInput == null;
6192        final boolean switchEllipsize = mEllipsize == TruncateAt.MARQUEE &&
6193                mMarqueeFadeMode != MARQUEE_FADE_NORMAL;
6194        TruncateAt effectiveEllipsize = mEllipsize;
6195        if (mEllipsize == TruncateAt.MARQUEE &&
6196                mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
6197            effectiveEllipsize = TruncateAt.END_SMALL;
6198        }
6199
6200        if (mTextDir == null) {
6201            resolveTextDirection();
6202        }
6203
6204        mLayout = makeSingleLayout(wantWidth, boring, ellipsisWidth, alignment, shouldEllipsize,
6205                effectiveEllipsize, effectiveEllipsize == mEllipsize);
6206        if (switchEllipsize) {
6207            TruncateAt oppositeEllipsize = effectiveEllipsize == TruncateAt.MARQUEE ?
6208                    TruncateAt.END : TruncateAt.MARQUEE;
6209            mSavedMarqueeModeLayout = makeSingleLayout(wantWidth, boring, ellipsisWidth, alignment,
6210                    shouldEllipsize, oppositeEllipsize, effectiveEllipsize != mEllipsize);
6211        }
6212
6213        shouldEllipsize = mEllipsize != null;
6214        mHintLayout = null;
6215
6216        if (mHint != null) {
6217            if (shouldEllipsize) hintWidth = wantWidth;
6218
6219            if (hintBoring == UNKNOWN_BORING) {
6220                hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mTextDir,
6221                                                   mHintBoring);
6222                if (hintBoring != null) {
6223                    mHintBoring = hintBoring;
6224                }
6225            }
6226
6227            if (hintBoring != null) {
6228                if (hintBoring.width <= hintWidth &&
6229                    (!shouldEllipsize || hintBoring.width <= ellipsisWidth)) {
6230                    if (mSavedHintLayout != null) {
6231                        mHintLayout = mSavedHintLayout.
6232                                replaceOrMake(mHint, mTextPaint,
6233                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6234                                hintBoring, mIncludePad);
6235                    } else {
6236                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6237                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6238                                hintBoring, mIncludePad);
6239                    }
6240
6241                    mSavedHintLayout = (BoringLayout) mHintLayout;
6242                } else if (shouldEllipsize && hintBoring.width <= hintWidth) {
6243                    if (mSavedHintLayout != null) {
6244                        mHintLayout = mSavedHintLayout.
6245                                replaceOrMake(mHint, mTextPaint,
6246                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6247                                hintBoring, mIncludePad, mEllipsize,
6248                                ellipsisWidth);
6249                    } else {
6250                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6251                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6252                                hintBoring, mIncludePad, mEllipsize,
6253                                ellipsisWidth);
6254                    }
6255                } else if (shouldEllipsize) {
6256                    mHintLayout = new StaticLayout(mHint,
6257                                0, mHint.length(),
6258                                mTextPaint, hintWidth, alignment, mTextDir, mSpacingMult,
6259                                mSpacingAdd, mIncludePad, mEllipsize,
6260                                ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6261                } else {
6262                    mHintLayout = new StaticLayout(mHint, mTextPaint,
6263                            hintWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6264                            mIncludePad);
6265                }
6266            } else if (shouldEllipsize) {
6267                mHintLayout = new StaticLayout(mHint,
6268                            0, mHint.length(),
6269                            mTextPaint, hintWidth, alignment, mTextDir, mSpacingMult,
6270                            mSpacingAdd, mIncludePad, mEllipsize,
6271                            ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6272            } else {
6273                mHintLayout = new StaticLayout(mHint, mTextPaint,
6274                        hintWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6275                        mIncludePad);
6276            }
6277        }
6278
6279        if (bringIntoView) {
6280            registerForPreDraw();
6281        }
6282
6283        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6284            if (!compressText(ellipsisWidth)) {
6285                final int height = mLayoutParams.height;
6286                // If the size of the view does not depend on the size of the text, try to
6287                // start the marquee immediately
6288                if (height != LayoutParams.WRAP_CONTENT && height != LayoutParams.MATCH_PARENT) {
6289                    startMarquee();
6290                } else {
6291                    // Defer the start of the marquee until we know our width (see setFrame())
6292                    mRestartMarquee = true;
6293                }
6294            }
6295        }
6296
6297        // CursorControllers need a non-null mLayout
6298        prepareCursorControllers();
6299    }
6300
6301    private Layout makeSingleLayout(int wantWidth, BoringLayout.Metrics boring, int ellipsisWidth,
6302            Layout.Alignment alignment, boolean shouldEllipsize, TruncateAt effectiveEllipsize,
6303            boolean useSaved) {
6304        Layout result = null;
6305        if (mText instanceof Spannable) {
6306            result = new DynamicLayout(mText, mTransformed, mTextPaint, wantWidth,
6307                    alignment, mTextDir, mSpacingMult,
6308                    mSpacingAdd, mIncludePad, mInput == null ? effectiveEllipsize : null,
6309                            ellipsisWidth);
6310        } else {
6311            if (boring == UNKNOWN_BORING) {
6312                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
6313                if (boring != null) {
6314                    mBoring = boring;
6315                }
6316            }
6317
6318            if (boring != null) {
6319                if (boring.width <= wantWidth &&
6320                        (effectiveEllipsize == null || boring.width <= ellipsisWidth)) {
6321                    if (useSaved && mSavedLayout != null) {
6322                        result = mSavedLayout.replaceOrMake(mTransformed, mTextPaint,
6323                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6324                                boring, mIncludePad);
6325                    } else {
6326                        result = BoringLayout.make(mTransformed, mTextPaint,
6327                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6328                                boring, mIncludePad);
6329                    }
6330
6331                    if (useSaved) {
6332                        mSavedLayout = (BoringLayout) result;
6333                    }
6334                } else if (shouldEllipsize && boring.width <= wantWidth) {
6335                    if (useSaved && mSavedLayout != null) {
6336                        result = mSavedLayout.replaceOrMake(mTransformed, mTextPaint,
6337                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6338                                boring, mIncludePad, effectiveEllipsize,
6339                                ellipsisWidth);
6340                    } else {
6341                        result = BoringLayout.make(mTransformed, mTextPaint,
6342                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6343                                boring, mIncludePad, effectiveEllipsize,
6344                                ellipsisWidth);
6345                    }
6346                } else if (shouldEllipsize) {
6347                    result = new StaticLayout(mTransformed,
6348                            0, mTransformed.length(),
6349                            mTextPaint, wantWidth, alignment, mTextDir, mSpacingMult,
6350                            mSpacingAdd, mIncludePad, effectiveEllipsize,
6351                            ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6352                } else {
6353                    result = new StaticLayout(mTransformed, mTextPaint,
6354                            wantWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6355                            mIncludePad);
6356                }
6357            } else if (shouldEllipsize) {
6358                result = new StaticLayout(mTransformed,
6359                        0, mTransformed.length(),
6360                        mTextPaint, wantWidth, alignment, mTextDir, mSpacingMult,
6361                        mSpacingAdd, mIncludePad, effectiveEllipsize,
6362                        ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6363            } else {
6364                result = new StaticLayout(mTransformed, mTextPaint,
6365                        wantWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6366                        mIncludePad);
6367            }
6368        }
6369        return result;
6370    }
6371
6372    private boolean compressText(float width) {
6373        if (isHardwareAccelerated()) return false;
6374
6375        // Only compress the text if it hasn't been compressed by the previous pass
6376        if (width > 0.0f && mLayout != null && getLineCount() == 1 && !mUserSetTextScaleX &&
6377                mTextPaint.getTextScaleX() == 1.0f) {
6378            final float textWidth = mLayout.getLineWidth(0);
6379            final float overflow = (textWidth + 1.0f - width) / width;
6380            if (overflow > 0.0f && overflow <= Marquee.MARQUEE_DELTA_MAX) {
6381                mTextPaint.setTextScaleX(1.0f - overflow - 0.005f);
6382                post(new Runnable() {
6383                    public void run() {
6384                        requestLayout();
6385                    }
6386                });
6387                return true;
6388            }
6389        }
6390
6391        return false;
6392    }
6393
6394    private static int desired(Layout layout) {
6395        int n = layout.getLineCount();
6396        CharSequence text = layout.getText();
6397        float max = 0;
6398
6399        // if any line was wrapped, we can't use it.
6400        // but it's ok for the last line not to have a newline
6401
6402        for (int i = 0; i < n - 1; i++) {
6403            if (text.charAt(layout.getLineEnd(i) - 1) != '\n')
6404                return -1;
6405        }
6406
6407        for (int i = 0; i < n; i++) {
6408            max = Math.max(max, layout.getLineWidth(i));
6409        }
6410
6411        return (int) FloatMath.ceil(max);
6412    }
6413
6414    /**
6415     * Set whether the TextView includes extra top and bottom padding to make
6416     * room for accents that go above the normal ascent and descent.
6417     * The default is true.
6418     *
6419     * @attr ref android.R.styleable#TextView_includeFontPadding
6420     */
6421    public void setIncludeFontPadding(boolean includepad) {
6422        if (mIncludePad != includepad) {
6423            mIncludePad = includepad;
6424
6425            if (mLayout != null) {
6426                nullLayouts();
6427                requestLayout();
6428                invalidate();
6429            }
6430        }
6431    }
6432
6433    private static final BoringLayout.Metrics UNKNOWN_BORING = new BoringLayout.Metrics();
6434
6435    @Override
6436    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
6437        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
6438        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
6439        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
6440        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
6441
6442        int width;
6443        int height;
6444
6445        BoringLayout.Metrics boring = UNKNOWN_BORING;
6446        BoringLayout.Metrics hintBoring = UNKNOWN_BORING;
6447
6448        if (mTextDir == null) {
6449            resolveTextDirection();
6450        }
6451
6452        int des = -1;
6453        boolean fromexisting = false;
6454
6455        if (widthMode == MeasureSpec.EXACTLY) {
6456            // Parent has told us how big to be. So be it.
6457            width = widthSize;
6458        } else {
6459            if (mLayout != null && mEllipsize == null) {
6460                des = desired(mLayout);
6461            }
6462
6463            if (des < 0) {
6464                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
6465                if (boring != null) {
6466                    mBoring = boring;
6467                }
6468            } else {
6469                fromexisting = true;
6470            }
6471
6472            if (boring == null || boring == UNKNOWN_BORING) {
6473                if (des < 0) {
6474                    des = (int) FloatMath.ceil(Layout.getDesiredWidth(mTransformed, mTextPaint));
6475                }
6476
6477                width = des;
6478            } else {
6479                width = boring.width;
6480            }
6481
6482            final Drawables dr = mDrawables;
6483            if (dr != null) {
6484                width = Math.max(width, dr.mDrawableWidthTop);
6485                width = Math.max(width, dr.mDrawableWidthBottom);
6486            }
6487
6488            if (mHint != null) {
6489                int hintDes = -1;
6490                int hintWidth;
6491
6492                if (mHintLayout != null && mEllipsize == null) {
6493                    hintDes = desired(mHintLayout);
6494                }
6495
6496                if (hintDes < 0) {
6497                    hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mHintBoring);
6498                    if (hintBoring != null) {
6499                        mHintBoring = hintBoring;
6500                    }
6501                }
6502
6503                if (hintBoring == null || hintBoring == UNKNOWN_BORING) {
6504                    if (hintDes < 0) {
6505                        hintDes = (int) FloatMath.ceil(
6506                                Layout.getDesiredWidth(mHint, mTextPaint));
6507                    }
6508
6509                    hintWidth = hintDes;
6510                } else {
6511                    hintWidth = hintBoring.width;
6512                }
6513
6514                if (hintWidth > width) {
6515                    width = hintWidth;
6516                }
6517            }
6518
6519            width += getCompoundPaddingLeft() + getCompoundPaddingRight();
6520
6521            if (mMaxWidthMode == EMS) {
6522                width = Math.min(width, mMaxWidth * getLineHeight());
6523            } else {
6524                width = Math.min(width, mMaxWidth);
6525            }
6526
6527            if (mMinWidthMode == EMS) {
6528                width = Math.max(width, mMinWidth * getLineHeight());
6529            } else {
6530                width = Math.max(width, mMinWidth);
6531            }
6532
6533            // Check against our minimum width
6534            width = Math.max(width, getSuggestedMinimumWidth());
6535
6536            if (widthMode == MeasureSpec.AT_MOST) {
6537                width = Math.min(widthSize, width);
6538            }
6539        }
6540
6541        int want = width - getCompoundPaddingLeft() - getCompoundPaddingRight();
6542        int unpaddedWidth = want;
6543
6544        if (mHorizontallyScrolling) want = VERY_WIDE;
6545
6546        int hintWant = want;
6547        int hintWidth = (mHintLayout == null) ? hintWant : mHintLayout.getWidth();
6548
6549        if (mLayout == null) {
6550            makeNewLayout(want, hintWant, boring, hintBoring,
6551                          width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6552        } else {
6553            final boolean layoutChanged = (mLayout.getWidth() != want) ||
6554                    (hintWidth != hintWant) ||
6555                    (mLayout.getEllipsizedWidth() !=
6556                            width - getCompoundPaddingLeft() - getCompoundPaddingRight());
6557
6558            final boolean widthChanged = (mHint == null) &&
6559                    (mEllipsize == null) &&
6560                    (want > mLayout.getWidth()) &&
6561                    (mLayout instanceof BoringLayout || (fromexisting && des >= 0 && des <= want));
6562
6563            final boolean maximumChanged = (mMaxMode != mOldMaxMode) || (mMaximum != mOldMaximum);
6564
6565            if (layoutChanged || maximumChanged) {
6566                if (!maximumChanged && widthChanged) {
6567                    mLayout.increaseWidthTo(want);
6568                } else {
6569                    makeNewLayout(want, hintWant, boring, hintBoring,
6570                            width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6571                }
6572            } else {
6573                // Nothing has changed
6574            }
6575        }
6576
6577        if (heightMode == MeasureSpec.EXACTLY) {
6578            // Parent has told us how big to be. So be it.
6579            height = heightSize;
6580            mDesiredHeightAtMeasure = -1;
6581        } else {
6582            int desired = getDesiredHeight();
6583
6584            height = desired;
6585            mDesiredHeightAtMeasure = desired;
6586
6587            if (heightMode == MeasureSpec.AT_MOST) {
6588                height = Math.min(desired, heightSize);
6589            }
6590        }
6591
6592        int unpaddedHeight = height - getCompoundPaddingTop() - getCompoundPaddingBottom();
6593        if (mMaxMode == LINES && mLayout.getLineCount() > mMaximum) {
6594            unpaddedHeight = Math.min(unpaddedHeight, mLayout.getLineTop(mMaximum));
6595        }
6596
6597        /*
6598         * We didn't let makeNewLayout() register to bring the cursor into view,
6599         * so do it here if there is any possibility that it is needed.
6600         */
6601        if (mMovement != null ||
6602            mLayout.getWidth() > unpaddedWidth ||
6603            mLayout.getHeight() > unpaddedHeight) {
6604            registerForPreDraw();
6605        } else {
6606            scrollTo(0, 0);
6607        }
6608
6609        setMeasuredDimension(width, height);
6610    }
6611
6612    private int getDesiredHeight() {
6613        return Math.max(
6614                getDesiredHeight(mLayout, true),
6615                getDesiredHeight(mHintLayout, mEllipsize != null));
6616    }
6617
6618    private int getDesiredHeight(Layout layout, boolean cap) {
6619        if (layout == null) {
6620            return 0;
6621        }
6622
6623        int linecount = layout.getLineCount();
6624        int pad = getCompoundPaddingTop() + getCompoundPaddingBottom();
6625        int desired = layout.getLineTop(linecount);
6626
6627        final Drawables dr = mDrawables;
6628        if (dr != null) {
6629            desired = Math.max(desired, dr.mDrawableHeightLeft);
6630            desired = Math.max(desired, dr.mDrawableHeightRight);
6631        }
6632
6633        desired += pad;
6634
6635        if (mMaxMode == LINES) {
6636            /*
6637             * Don't cap the hint to a certain number of lines.
6638             * (Do cap it, though, if we have a maximum pixel height.)
6639             */
6640            if (cap) {
6641                if (linecount > mMaximum) {
6642                    desired = layout.getLineTop(mMaximum);
6643
6644                    if (dr != null) {
6645                        desired = Math.max(desired, dr.mDrawableHeightLeft);
6646                        desired = Math.max(desired, dr.mDrawableHeightRight);
6647                    }
6648
6649                    desired += pad;
6650                    linecount = mMaximum;
6651                }
6652            }
6653        } else {
6654            desired = Math.min(desired, mMaximum);
6655        }
6656
6657        if (mMinMode == LINES) {
6658            if (linecount < mMinimum) {
6659                desired += getLineHeight() * (mMinimum - linecount);
6660            }
6661        } else {
6662            desired = Math.max(desired, mMinimum);
6663        }
6664
6665        // Check against our minimum height
6666        desired = Math.max(desired, getSuggestedMinimumHeight());
6667
6668        return desired;
6669    }
6670
6671    /**
6672     * Check whether a change to the existing text layout requires a
6673     * new view layout.
6674     */
6675    private void checkForResize() {
6676        boolean sizeChanged = false;
6677
6678        if (mLayout != null) {
6679            // Check if our width changed
6680            if (mLayoutParams.width == LayoutParams.WRAP_CONTENT) {
6681                sizeChanged = true;
6682                invalidate();
6683            }
6684
6685            // Check if our height changed
6686            if (mLayoutParams.height == LayoutParams.WRAP_CONTENT) {
6687                int desiredHeight = getDesiredHeight();
6688
6689                if (desiredHeight != this.getHeight()) {
6690                    sizeChanged = true;
6691                }
6692            } else if (mLayoutParams.height == LayoutParams.MATCH_PARENT) {
6693                if (mDesiredHeightAtMeasure >= 0) {
6694                    int desiredHeight = getDesiredHeight();
6695
6696                    if (desiredHeight != mDesiredHeightAtMeasure) {
6697                        sizeChanged = true;
6698                    }
6699                }
6700            }
6701        }
6702
6703        if (sizeChanged) {
6704            requestLayout();
6705            // caller will have already invalidated
6706        }
6707    }
6708
6709    /**
6710     * Check whether entirely new text requires a new view layout
6711     * or merely a new text layout.
6712     */
6713    private void checkForRelayout() {
6714        // If we have a fixed width, we can just swap in a new text layout
6715        // if the text height stays the same or if the view height is fixed.
6716
6717        if ((mLayoutParams.width != LayoutParams.WRAP_CONTENT ||
6718                (mMaxWidthMode == mMinWidthMode && mMaxWidth == mMinWidth)) &&
6719                (mHint == null || mHintLayout != null) &&
6720                (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight() > 0)) {
6721            // Static width, so try making a new text layout.
6722
6723            int oldht = mLayout.getHeight();
6724            int want = mLayout.getWidth();
6725            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
6726
6727            /*
6728             * No need to bring the text into view, since the size is not
6729             * changing (unless we do the requestLayout(), in which case it
6730             * will happen at measure).
6731             */
6732            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
6733                          mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight(),
6734                          false);
6735
6736            if (mEllipsize != TextUtils.TruncateAt.MARQUEE) {
6737                // In a fixed-height view, so use our new text layout.
6738                if (mLayoutParams.height != LayoutParams.WRAP_CONTENT &&
6739                    mLayoutParams.height != LayoutParams.MATCH_PARENT) {
6740                    invalidate();
6741                    return;
6742                }
6743
6744                // Dynamic height, but height has stayed the same,
6745                // so use our new text layout.
6746                if (mLayout.getHeight() == oldht &&
6747                    (mHintLayout == null || mHintLayout.getHeight() == oldht)) {
6748                    invalidate();
6749                    return;
6750                }
6751            }
6752
6753            // We lose: the height has changed and we have a dynamic height.
6754            // Request a new view layout using our new text layout.
6755            requestLayout();
6756            invalidate();
6757        } else {
6758            // Dynamic width, so we have no choice but to request a new
6759            // view layout with a new text layout.
6760            nullLayouts();
6761            requestLayout();
6762            invalidate();
6763        }
6764    }
6765
6766    /**
6767     * Returns true if anything changed.
6768     */
6769    private boolean bringTextIntoView() {
6770        int line = 0;
6771        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6772            line = mLayout.getLineCount() - 1;
6773        }
6774
6775        Layout.Alignment a = mLayout.getParagraphAlignment(line);
6776        int dir = mLayout.getParagraphDirection(line);
6777        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6778        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6779        int ht = mLayout.getHeight();
6780
6781        int scrollx, scrolly;
6782
6783        // Convert to left, center, or right alignment.
6784        if (a == Layout.Alignment.ALIGN_NORMAL) {
6785            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_LEFT :
6786                Layout.Alignment.ALIGN_RIGHT;
6787        } else if (a == Layout.Alignment.ALIGN_OPPOSITE){
6788            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_RIGHT :
6789                Layout.Alignment.ALIGN_LEFT;
6790        }
6791
6792        if (a == Layout.Alignment.ALIGN_CENTER) {
6793            /*
6794             * Keep centered if possible, or, if it is too wide to fit,
6795             * keep leading edge in view.
6796             */
6797
6798            int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6799            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6800
6801            if (right - left < hspace) {
6802                scrollx = (right + left) / 2 - hspace / 2;
6803            } else {
6804                if (dir < 0) {
6805                    scrollx = right - hspace;
6806                } else {
6807                    scrollx = left;
6808                }
6809            }
6810        } else if (a == Layout.Alignment.ALIGN_RIGHT) {
6811            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6812            scrollx = right - hspace;
6813        } else { // a == Layout.Alignment.ALIGN_LEFT (will also be the default)
6814            scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
6815        }
6816
6817        if (ht < vspace) {
6818            scrolly = 0;
6819        } else {
6820            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6821                scrolly = ht - vspace;
6822            } else {
6823                scrolly = 0;
6824            }
6825        }
6826
6827        if (scrollx != mScrollX || scrolly != mScrollY) {
6828            scrollTo(scrollx, scrolly);
6829            return true;
6830        } else {
6831            return false;
6832        }
6833    }
6834
6835    /**
6836     * Move the point, specified by the offset, into the view if it is needed.
6837     * This has to be called after layout. Returns true if anything changed.
6838     */
6839    public boolean bringPointIntoView(int offset) {
6840        boolean changed = false;
6841
6842        if (mLayout == null) return changed;
6843
6844        int line = mLayout.getLineForOffset(offset);
6845
6846        // FIXME: Is it okay to truncate this, or should we round?
6847        final int x = (int)mLayout.getPrimaryHorizontal(offset);
6848        final int top = mLayout.getLineTop(line);
6849        final int bottom = mLayout.getLineTop(line + 1);
6850
6851        int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6852        int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6853        int ht = mLayout.getHeight();
6854
6855        int grav;
6856
6857        switch (mLayout.getParagraphAlignment(line)) {
6858            case ALIGN_LEFT:
6859                grav = 1;
6860                break;
6861            case ALIGN_RIGHT:
6862                grav = -1;
6863                break;
6864            case ALIGN_NORMAL:
6865                grav = mLayout.getParagraphDirection(line);
6866                break;
6867            case ALIGN_OPPOSITE:
6868                grav = -mLayout.getParagraphDirection(line);
6869                break;
6870            case ALIGN_CENTER:
6871            default:
6872                grav = 0;
6873                break;
6874        }
6875
6876        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6877        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6878
6879        int hslack = (bottom - top) / 2;
6880        int vslack = hslack;
6881
6882        if (vslack > vspace / 4)
6883            vslack = vspace / 4;
6884        if (hslack > hspace / 4)
6885            hslack = hspace / 4;
6886
6887        int hs = mScrollX;
6888        int vs = mScrollY;
6889
6890        if (top - vs < vslack)
6891            vs = top - vslack;
6892        if (bottom - vs > vspace - vslack)
6893            vs = bottom - (vspace - vslack);
6894        if (ht - vs < vspace)
6895            vs = ht - vspace;
6896        if (0 - vs > 0)
6897            vs = 0;
6898
6899        if (grav != 0) {
6900            if (x - hs < hslack) {
6901                hs = x - hslack;
6902            }
6903            if (x - hs > hspace - hslack) {
6904                hs = x - (hspace - hslack);
6905            }
6906        }
6907
6908        if (grav < 0) {
6909            if (left - hs > 0)
6910                hs = left;
6911            if (right - hs < hspace)
6912                hs = right - hspace;
6913        } else if (grav > 0) {
6914            if (right - hs < hspace)
6915                hs = right - hspace;
6916            if (left - hs > 0)
6917                hs = left;
6918        } else /* grav == 0 */ {
6919            if (right - left <= hspace) {
6920                /*
6921                 * If the entire text fits, center it exactly.
6922                 */
6923                hs = left - (hspace - (right - left)) / 2;
6924            } else if (x > right - hslack) {
6925                /*
6926                 * If we are near the right edge, keep the right edge
6927                 * at the edge of the view.
6928                 */
6929                hs = right - hspace;
6930            } else if (x < left + hslack) {
6931                /*
6932                 * If we are near the left edge, keep the left edge
6933                 * at the edge of the view.
6934                 */
6935                hs = left;
6936            } else if (left > hs) {
6937                /*
6938                 * Is there whitespace visible at the left?  Fix it if so.
6939                 */
6940                hs = left;
6941            } else if (right < hs + hspace) {
6942                /*
6943                 * Is there whitespace visible at the right?  Fix it if so.
6944                 */
6945                hs = right - hspace;
6946            } else {
6947                /*
6948                 * Otherwise, float as needed.
6949                 */
6950                if (x - hs < hslack) {
6951                    hs = x - hslack;
6952                }
6953                if (x - hs > hspace - hslack) {
6954                    hs = x - (hspace - hslack);
6955                }
6956            }
6957        }
6958
6959        if (hs != mScrollX || vs != mScrollY) {
6960            if (mScroller == null) {
6961                scrollTo(hs, vs);
6962            } else {
6963                long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll;
6964                int dx = hs - mScrollX;
6965                int dy = vs - mScrollY;
6966
6967                if (duration > ANIMATED_SCROLL_GAP) {
6968                    mScroller.startScroll(mScrollX, mScrollY, dx, dy);
6969                    awakenScrollBars(mScroller.getDuration());
6970                    invalidate();
6971                } else {
6972                    if (!mScroller.isFinished()) {
6973                        mScroller.abortAnimation();
6974                    }
6975
6976                    scrollBy(dx, dy);
6977                }
6978
6979                mLastScroll = AnimationUtils.currentAnimationTimeMillis();
6980            }
6981
6982            changed = true;
6983        }
6984
6985        if (isFocused()) {
6986            // This offsets because getInterestingRect() is in terms of viewport coordinates, but
6987            // requestRectangleOnScreen() is in terms of content coordinates.
6988
6989            if (mTempRect == null) mTempRect = new Rect();
6990            // The offsets here are to ensure the rectangle we are using is
6991            // within our view bounds, in case the cursor is on the far left
6992            // or right.  If it isn't withing the bounds, then this request
6993            // will be ignored.
6994            mTempRect.set(x - 2, top, x + 2, bottom);
6995            getInterestingRect(mTempRect, line);
6996            mTempRect.offset(mScrollX, mScrollY);
6997
6998            if (requestRectangleOnScreen(mTempRect)) {
6999                changed = true;
7000            }
7001        }
7002
7003        return changed;
7004    }
7005
7006    /**
7007     * Move the cursor, if needed, so that it is at an offset that is visible
7008     * to the user.  This will not move the cursor if it represents more than
7009     * one character (a selection range).  This will only work if the
7010     * TextView contains spannable text; otherwise it will do nothing.
7011     *
7012     * @return True if the cursor was actually moved, false otherwise.
7013     */
7014    public boolean moveCursorToVisibleOffset() {
7015        if (!(mText instanceof Spannable)) {
7016            return false;
7017        }
7018        int start = getSelectionStart();
7019        int end = getSelectionEnd();
7020        if (start != end) {
7021            return false;
7022        }
7023
7024        // First: make sure the line is visible on screen:
7025
7026        int line = mLayout.getLineForOffset(start);
7027
7028        final int top = mLayout.getLineTop(line);
7029        final int bottom = mLayout.getLineTop(line + 1);
7030        final int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
7031        int vslack = (bottom - top) / 2;
7032        if (vslack > vspace / 4)
7033            vslack = vspace / 4;
7034        final int vs = mScrollY;
7035
7036        if (top < (vs+vslack)) {
7037            line = mLayout.getLineForVertical(vs+vslack+(bottom-top));
7038        } else if (bottom > (vspace+vs-vslack)) {
7039            line = mLayout.getLineForVertical(vspace+vs-vslack-(bottom-top));
7040        }
7041
7042        // Next: make sure the character is visible on screen:
7043
7044        final int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
7045        final int hs = mScrollX;
7046        final int leftChar = mLayout.getOffsetForHorizontal(line, hs);
7047        final int rightChar = mLayout.getOffsetForHorizontal(line, hspace+hs);
7048
7049        // line might contain bidirectional text
7050        final int lowChar = leftChar < rightChar ? leftChar : rightChar;
7051        final int highChar = leftChar > rightChar ? leftChar : rightChar;
7052
7053        int newStart = start;
7054        if (newStart < lowChar) {
7055            newStart = lowChar;
7056        } else if (newStart > highChar) {
7057            newStart = highChar;
7058        }
7059
7060        if (newStart != start) {
7061            Selection.setSelection((Spannable)mText, newStart);
7062            return true;
7063        }
7064
7065        return false;
7066    }
7067
7068    @Override
7069    public void computeScroll() {
7070        if (mScroller != null) {
7071            if (mScroller.computeScrollOffset()) {
7072                mScrollX = mScroller.getCurrX();
7073                mScrollY = mScroller.getCurrY();
7074                invalidateParentCaches();
7075                postInvalidate();  // So we draw again
7076            }
7077        }
7078    }
7079
7080    private void getInterestingRect(Rect r, int line) {
7081        convertFromViewportToContentCoordinates(r);
7082
7083        // Rectangle can can be expanded on first and last line to take
7084        // padding into account.
7085        // TODO Take left/right padding into account too?
7086        if (line == 0) r.top -= getExtendedPaddingTop();
7087        if (line == mLayout.getLineCount() - 1) r.bottom += getExtendedPaddingBottom();
7088    }
7089
7090    private void convertFromViewportToContentCoordinates(Rect r) {
7091        final int horizontalOffset = viewportToContentHorizontalOffset();
7092        r.left += horizontalOffset;
7093        r.right += horizontalOffset;
7094
7095        final int verticalOffset = viewportToContentVerticalOffset();
7096        r.top += verticalOffset;
7097        r.bottom += verticalOffset;
7098    }
7099
7100    private int viewportToContentHorizontalOffset() {
7101        return getCompoundPaddingLeft() - mScrollX;
7102    }
7103
7104    private int viewportToContentVerticalOffset() {
7105        int offset = getExtendedPaddingTop() - mScrollY;
7106        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
7107            offset += getVerticalOffset(false);
7108        }
7109        return offset;
7110    }
7111
7112    @Override
7113    public void debug(int depth) {
7114        super.debug(depth);
7115
7116        String output = debugIndent(depth);
7117        output += "frame={" + mLeft + ", " + mTop + ", " + mRight
7118                + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY
7119                + "} ";
7120
7121        if (mText != null) {
7122
7123            output += "mText=\"" + mText + "\" ";
7124            if (mLayout != null) {
7125                output += "mLayout width=" + mLayout.getWidth()
7126                        + " height=" + mLayout.getHeight();
7127            }
7128        } else {
7129            output += "mText=NULL";
7130        }
7131        Log.d(VIEW_LOG_TAG, output);
7132    }
7133
7134    /**
7135     * Convenience for {@link Selection#getSelectionStart}.
7136     */
7137    @ViewDebug.ExportedProperty(category = "text")
7138    public int getSelectionStart() {
7139        return Selection.getSelectionStart(getText());
7140    }
7141
7142    /**
7143     * Convenience for {@link Selection#getSelectionEnd}.
7144     */
7145    @ViewDebug.ExportedProperty(category = "text")
7146    public int getSelectionEnd() {
7147        return Selection.getSelectionEnd(getText());
7148    }
7149
7150    /**
7151     * Return true iff there is a selection inside this text view.
7152     */
7153    public boolean hasSelection() {
7154        final int selectionStart = getSelectionStart();
7155        final int selectionEnd = getSelectionEnd();
7156
7157        return selectionStart >= 0 && selectionStart != selectionEnd;
7158    }
7159
7160    /**
7161     * Sets the properties of this field (lines, horizontally scrolling,
7162     * transformation method) to be for a single-line input.
7163     *
7164     * @attr ref android.R.styleable#TextView_singleLine
7165     */
7166    public void setSingleLine() {
7167        setSingleLine(true);
7168    }
7169
7170    /**
7171     * Sets the properties of this field to transform input to ALL CAPS
7172     * display. This may use a "small caps" formatting if available.
7173     * This setting will be ignored if this field is editable or selectable.
7174     *
7175     * This call replaces the current transformation method. Disabling this
7176     * will not necessarily restore the previous behavior from before this
7177     * was enabled.
7178     *
7179     * @see #setTransformationMethod(TransformationMethod)
7180     * @attr ref android.R.styleable#TextView_textAllCaps
7181     */
7182    public void setAllCaps(boolean allCaps) {
7183        if (allCaps) {
7184            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
7185        } else {
7186            setTransformationMethod(null);
7187        }
7188    }
7189
7190    /**
7191     * If true, sets the properties of this field (number of lines, horizontally scrolling,
7192     * transformation method) to be for a single-line input; if false, restores these to the default
7193     * conditions.
7194     *
7195     * Note that the default conditions are not necessarily those that were in effect prior this
7196     * method, and you may want to reset these properties to your custom values.
7197     *
7198     * @attr ref android.R.styleable#TextView_singleLine
7199     */
7200    @android.view.RemotableViewMethod
7201    public void setSingleLine(boolean singleLine) {
7202        // Could be used, but may break backward compatibility.
7203        // if (mSingleLine == singleLine) return;
7204        setInputTypeSingleLine(singleLine);
7205        applySingleLine(singleLine, true, true);
7206    }
7207
7208    /**
7209     * Adds or remove the EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE on the mInputType.
7210     * @param singleLine
7211     */
7212    private void setInputTypeSingleLine(boolean singleLine) {
7213        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
7214            if (singleLine) {
7215                mInputType &= ~EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
7216            } else {
7217                mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
7218            }
7219        }
7220    }
7221
7222    private void applySingleLine(boolean singleLine, boolean applyTransformation,
7223            boolean changeMaxLines) {
7224        mSingleLine = singleLine;
7225        if (singleLine) {
7226            setLines(1);
7227            setHorizontallyScrolling(true);
7228            if (applyTransformation) {
7229                setTransformationMethod(SingleLineTransformationMethod.getInstance());
7230            }
7231        } else {
7232            if (changeMaxLines) {
7233                setMaxLines(Integer.MAX_VALUE);
7234            }
7235            setHorizontallyScrolling(false);
7236            if (applyTransformation) {
7237                setTransformationMethod(null);
7238            }
7239        }
7240    }
7241
7242    /**
7243     * Causes words in the text that are longer than the view is wide
7244     * to be ellipsized instead of broken in the middle.  You may also
7245     * want to {@link #setSingleLine} or {@link #setHorizontallyScrolling}
7246     * to constrain the text to a single line.  Use <code>null</code>
7247     * to turn off ellipsizing.
7248     *
7249     * If {@link #setMaxLines} has been used to set two or more lines,
7250     * {@link android.text.TextUtils.TruncateAt#END} and
7251     * {@link android.text.TextUtils.TruncateAt#MARQUEE}* are only supported
7252     * (other ellipsizing types will not do anything).
7253     *
7254     * @attr ref android.R.styleable#TextView_ellipsize
7255     */
7256    public void setEllipsize(TextUtils.TruncateAt where) {
7257        // TruncateAt is an enum. != comparison is ok between these singleton objects.
7258        if (mEllipsize != where) {
7259            mEllipsize = where;
7260
7261            if (mLayout != null) {
7262                nullLayouts();
7263                requestLayout();
7264                invalidate();
7265            }
7266        }
7267    }
7268
7269    /**
7270     * Sets how many times to repeat the marquee animation. Only applied if the
7271     * TextView has marquee enabled. Set to -1 to repeat indefinitely.
7272     *
7273     * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
7274     */
7275    public void setMarqueeRepeatLimit(int marqueeLimit) {
7276        mMarqueeRepeatLimit = marqueeLimit;
7277    }
7278
7279    /**
7280     * Returns where, if anywhere, words that are longer than the view
7281     * is wide should be ellipsized.
7282     */
7283    @ViewDebug.ExportedProperty
7284    public TextUtils.TruncateAt getEllipsize() {
7285        return mEllipsize;
7286    }
7287
7288    /**
7289     * Set the TextView so that when it takes focus, all the text is
7290     * selected.
7291     *
7292     * @attr ref android.R.styleable#TextView_selectAllOnFocus
7293     */
7294    @android.view.RemotableViewMethod
7295    public void setSelectAllOnFocus(boolean selectAllOnFocus) {
7296        mSelectAllOnFocus = selectAllOnFocus;
7297
7298        if (selectAllOnFocus && !(mText instanceof Spannable)) {
7299            setText(mText, BufferType.SPANNABLE);
7300        }
7301    }
7302
7303    /**
7304     * Set whether the cursor is visible.  The default is true.
7305     *
7306     * @attr ref android.R.styleable#TextView_cursorVisible
7307     */
7308    @android.view.RemotableViewMethod
7309    public void setCursorVisible(boolean visible) {
7310        if (mCursorVisible != visible) {
7311            mCursorVisible = visible;
7312            invalidate();
7313
7314            makeBlink();
7315
7316            // InsertionPointCursorController depends on mCursorVisible
7317            prepareCursorControllers();
7318        }
7319    }
7320
7321    private boolean isCursorVisible() {
7322        return mCursorVisible && isTextEditable();
7323    }
7324
7325    private boolean canMarquee() {
7326        int width = (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight());
7327        return width > 0 && (mLayout.getLineWidth(0) > width ||
7328                (mMarqueeFadeMode != MARQUEE_FADE_NORMAL && mSavedMarqueeModeLayout != null &&
7329                        mSavedMarqueeModeLayout.getLineWidth(0) > width));
7330    }
7331
7332    private void startMarquee() {
7333        // Do not ellipsize EditText
7334        if (mInput != null) return;
7335
7336        if (compressText(getWidth() - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
7337            return;
7338        }
7339
7340        if ((mMarquee == null || mMarquee.isStopped()) && (isFocused() || isSelected()) &&
7341                getLineCount() == 1 && canMarquee()) {
7342
7343            if (mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
7344                mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_FADE;
7345                final Layout tmp = mLayout;
7346                mLayout = mSavedMarqueeModeLayout;
7347                mSavedMarqueeModeLayout = tmp;
7348                setHorizontalFadingEdgeEnabled(true);
7349                requestLayout();
7350                invalidate();
7351            }
7352
7353            if (mMarquee == null) mMarquee = new Marquee(this);
7354            mMarquee.start(mMarqueeRepeatLimit);
7355        }
7356    }
7357
7358    private void stopMarquee() {
7359        if (mMarquee != null && !mMarquee.isStopped()) {
7360            mMarquee.stop();
7361        }
7362
7363        if (mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_FADE) {
7364            mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
7365            final Layout tmp = mSavedMarqueeModeLayout;
7366            mSavedMarqueeModeLayout = mLayout;
7367            mLayout = tmp;
7368            setHorizontalFadingEdgeEnabled(false);
7369            requestLayout();
7370            invalidate();
7371        }
7372    }
7373
7374    private void startStopMarquee(boolean start) {
7375        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7376            if (start) {
7377                startMarquee();
7378            } else {
7379                stopMarquee();
7380            }
7381        }
7382    }
7383
7384    private static final class Marquee extends Handler {
7385        // TODO: Add an option to configure this
7386        private static final float MARQUEE_DELTA_MAX = 0.07f;
7387        private static final int MARQUEE_DELAY = 1200;
7388        private static final int MARQUEE_RESTART_DELAY = 1200;
7389        private static final int MARQUEE_RESOLUTION = 1000 / 30;
7390        private static final int MARQUEE_PIXELS_PER_SECOND = 30;
7391
7392        private static final byte MARQUEE_STOPPED = 0x0;
7393        private static final byte MARQUEE_STARTING = 0x1;
7394        private static final byte MARQUEE_RUNNING = 0x2;
7395
7396        private static final int MESSAGE_START = 0x1;
7397        private static final int MESSAGE_TICK = 0x2;
7398        private static final int MESSAGE_RESTART = 0x3;
7399
7400        private final WeakReference<TextView> mView;
7401
7402        private byte mStatus = MARQUEE_STOPPED;
7403        private final float mScrollUnit;
7404        private float mMaxScroll;
7405        float mMaxFadeScroll;
7406        private float mGhostStart;
7407        private float mGhostOffset;
7408        private float mFadeStop;
7409        private int mRepeatLimit;
7410
7411        float mScroll;
7412
7413        Marquee(TextView v) {
7414            final float density = v.getContext().getResources().getDisplayMetrics().density;
7415            mScrollUnit = (MARQUEE_PIXELS_PER_SECOND * density) / MARQUEE_RESOLUTION;
7416            mView = new WeakReference<TextView>(v);
7417        }
7418
7419        @Override
7420        public void handleMessage(Message msg) {
7421            switch (msg.what) {
7422                case MESSAGE_START:
7423                    mStatus = MARQUEE_RUNNING;
7424                    tick();
7425                    break;
7426                case MESSAGE_TICK:
7427                    tick();
7428                    break;
7429                case MESSAGE_RESTART:
7430                    if (mStatus == MARQUEE_RUNNING) {
7431                        if (mRepeatLimit >= 0) {
7432                            mRepeatLimit--;
7433                        }
7434                        start(mRepeatLimit);
7435                    }
7436                    break;
7437            }
7438        }
7439
7440        void tick() {
7441            if (mStatus != MARQUEE_RUNNING) {
7442                return;
7443            }
7444
7445            removeMessages(MESSAGE_TICK);
7446
7447            final TextView textView = mView.get();
7448            if (textView != null && (textView.isFocused() || textView.isSelected())) {
7449                mScroll += mScrollUnit;
7450                if (mScroll > mMaxScroll) {
7451                    mScroll = mMaxScroll;
7452                    sendEmptyMessageDelayed(MESSAGE_RESTART, MARQUEE_RESTART_DELAY);
7453                } else {
7454                    sendEmptyMessageDelayed(MESSAGE_TICK, MARQUEE_RESOLUTION);
7455                }
7456                textView.invalidate();
7457            }
7458        }
7459
7460        void stop() {
7461            mStatus = MARQUEE_STOPPED;
7462            removeMessages(MESSAGE_START);
7463            removeMessages(MESSAGE_RESTART);
7464            removeMessages(MESSAGE_TICK);
7465            resetScroll();
7466        }
7467
7468        private void resetScroll() {
7469            mScroll = 0.0f;
7470            final TextView textView = mView.get();
7471            if (textView != null) textView.invalidate();
7472        }
7473
7474        void start(int repeatLimit) {
7475            if (repeatLimit == 0) {
7476                stop();
7477                return;
7478            }
7479            mRepeatLimit = repeatLimit;
7480            final TextView textView = mView.get();
7481            if (textView != null && textView.mLayout != null) {
7482                mStatus = MARQUEE_STARTING;
7483                mScroll = 0.0f;
7484                final int textWidth = textView.getWidth() - textView.getCompoundPaddingLeft() -
7485                        textView.getCompoundPaddingRight();
7486                final float lineWidth = textView.mLayout.getLineWidth(0);
7487                final float gap = textWidth / 3.0f;
7488                mGhostStart = lineWidth - textWidth + gap;
7489                mMaxScroll = mGhostStart + textWidth;
7490                mGhostOffset = lineWidth + gap;
7491                mFadeStop = lineWidth + textWidth / 6.0f;
7492                mMaxFadeScroll = mGhostStart + lineWidth + lineWidth;
7493
7494                textView.invalidate();
7495                sendEmptyMessageDelayed(MESSAGE_START, MARQUEE_DELAY);
7496            }
7497        }
7498
7499        float getGhostOffset() {
7500            return mGhostOffset;
7501        }
7502
7503        boolean shouldDrawLeftFade() {
7504            return mScroll <= mFadeStop;
7505        }
7506
7507        boolean shouldDrawGhost() {
7508            return mStatus == MARQUEE_RUNNING && mScroll > mGhostStart;
7509        }
7510
7511        boolean isRunning() {
7512            return mStatus == MARQUEE_RUNNING;
7513        }
7514
7515        boolean isStopped() {
7516            return mStatus == MARQUEE_STOPPED;
7517        }
7518    }
7519
7520    /**
7521     * This method is called when the text is changed, in case any subclasses
7522     * would like to know.
7523     *
7524     * Within <code>text</code>, the <code>lengthAfter</code> characters
7525     * beginning at <code>start</code> have just replaced old text that had
7526     * length <code>lengthBefore</code>. It is an error to attempt to make
7527     * changes to <code>text</code> from this callback.
7528     *
7529     * @param text The text the TextView is displaying
7530     * @param start The offset of the start of the range of the text that was
7531     * modified
7532     * @param lengthBefore The length of the former text that has been replaced
7533     * @param lengthAfter The length of the replacement modified text
7534     */
7535    protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
7536        // intentionally empty, template pattern method can be overridden by subclasses
7537    }
7538
7539    /**
7540     * This method is called when the selection has changed, in case any
7541     * subclasses would like to know.
7542     *
7543     * @param selStart The new selection start location.
7544     * @param selEnd The new selection end location.
7545     */
7546    protected void onSelectionChanged(int selStart, int selEnd) {
7547        sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED);
7548    }
7549
7550    /**
7551     * Adds a TextWatcher to the list of those whose methods are called
7552     * whenever this TextView's text changes.
7553     * <p>
7554     * In 1.0, the {@link TextWatcher#afterTextChanged} method was erroneously
7555     * not called after {@link #setText} calls.  Now, doing {@link #setText}
7556     * if there are any text changed listeners forces the buffer type to
7557     * Editable if it would not otherwise be and does call this method.
7558     */
7559    public void addTextChangedListener(TextWatcher watcher) {
7560        if (mListeners == null) {
7561            mListeners = new ArrayList<TextWatcher>();
7562        }
7563
7564        mListeners.add(watcher);
7565    }
7566
7567    /**
7568     * Removes the specified TextWatcher from the list of those whose
7569     * methods are called
7570     * whenever this TextView's text changes.
7571     */
7572    public void removeTextChangedListener(TextWatcher watcher) {
7573        if (mListeners != null) {
7574            int i = mListeners.indexOf(watcher);
7575
7576            if (i >= 0) {
7577                mListeners.remove(i);
7578            }
7579        }
7580    }
7581
7582    private void sendBeforeTextChanged(CharSequence text, int start, int before, int after) {
7583        if (mListeners != null) {
7584            final ArrayList<TextWatcher> list = mListeners;
7585            final int count = list.size();
7586            for (int i = 0; i < count; i++) {
7587                list.get(i).beforeTextChanged(text, start, before, after);
7588            }
7589        }
7590
7591        // The spans that are inside or intersect the modified region no longer make sense
7592        removeIntersectingSpans(start, start + before, SpellCheckSpan.class);
7593        removeIntersectingSpans(start, start + before, SuggestionSpan.class);
7594    }
7595
7596    // Removes all spans that are inside or actually overlap the start..end range
7597    private <T> void removeIntersectingSpans(int start, int end, Class<T> type) {
7598        if (!(mText instanceof Editable)) return;
7599        Editable text = (Editable) mText;
7600
7601        T[] spans = text.getSpans(start, end, type);
7602        final int length = spans.length;
7603        for (int i = 0; i < length; i++) {
7604            final int s = text.getSpanStart(spans[i]);
7605            final int e = text.getSpanEnd(spans[i]);
7606            // Spans that are adjacent to the edited region will be handled in
7607            // updateSpellCheckSpans. Result depends on what will be added (space or text)
7608            if (e == start || s == end) break;
7609            text.removeSpan(spans[i]);
7610        }
7611    }
7612
7613    /**
7614     * Not private so it can be called from an inner class without going
7615     * through a thunk.
7616     */
7617    void sendOnTextChanged(CharSequence text, int start, int before, int after) {
7618        if (mListeners != null) {
7619            final ArrayList<TextWatcher> list = mListeners;
7620            final int count = list.size();
7621            for (int i = 0; i < count; i++) {
7622                list.get(i).onTextChanged(text, start, before, after);
7623            }
7624        }
7625
7626        updateSpellCheckSpans(start, start + after);
7627
7628        // Hide the controllers as soon as text is modified (typing, procedural...)
7629        // We do not hide the span controllers, since they can be added when a new text is
7630        // inserted into the text view (voice IME).
7631        hideCursorControllers();
7632    }
7633
7634    /**
7635     * Not private so it can be called from an inner class without going
7636     * through a thunk.
7637     */
7638    void sendAfterTextChanged(Editable text) {
7639        if (mListeners != null) {
7640            final ArrayList<TextWatcher> list = mListeners;
7641            final int count = list.size();
7642            for (int i = 0; i < count; i++) {
7643                list.get(i).afterTextChanged(text);
7644            }
7645        }
7646    }
7647
7648    /**
7649     * Not private so it can be called from an inner class without going
7650     * through a thunk.
7651     */
7652    void handleTextChanged(CharSequence buffer, int start, int before, int after) {
7653        final InputMethodState ims = mInputMethodState;
7654        if (ims == null || ims.mBatchEditNesting == 0) {
7655            updateAfterEdit();
7656        }
7657        if (ims != null) {
7658            ims.mContentChanged = true;
7659            if (ims.mChangedStart < 0) {
7660                ims.mChangedStart = start;
7661                ims.mChangedEnd = start+before;
7662            } else {
7663                ims.mChangedStart = Math.min(ims.mChangedStart, start);
7664                ims.mChangedEnd = Math.max(ims.mChangedEnd, start + before - ims.mChangedDelta);
7665            }
7666            ims.mChangedDelta += after-before;
7667        }
7668
7669        sendOnTextChanged(buffer, start, before, after);
7670        onTextChanged(buffer, start, before, after);
7671    }
7672
7673    /**
7674     * Not private so it can be called from an inner class without going
7675     * through a thunk.
7676     */
7677    void spanChange(Spanned buf, Object what, int oldStart, int newStart, int oldEnd, int newEnd) {
7678        // XXX Make the start and end move together if this ends up
7679        // spending too much time invalidating.
7680
7681        boolean selChanged = false;
7682        int newSelStart=-1, newSelEnd=-1;
7683
7684        final InputMethodState ims = mInputMethodState;
7685
7686        if (what == Selection.SELECTION_END) {
7687            mHighlightPathBogus = true;
7688            selChanged = true;
7689            newSelEnd = newStart;
7690
7691            if (!isFocused()) {
7692                mSelectionMoved = true;
7693            }
7694
7695            if (oldStart >= 0 || newStart >= 0) {
7696                invalidateCursor(Selection.getSelectionStart(buf), oldStart, newStart);
7697                registerForPreDraw();
7698                makeBlink();
7699            }
7700        }
7701
7702        if (what == Selection.SELECTION_START) {
7703            mHighlightPathBogus = true;
7704            selChanged = true;
7705            newSelStart = newStart;
7706
7707            if (!isFocused()) {
7708                mSelectionMoved = true;
7709            }
7710
7711            if (oldStart >= 0 || newStart >= 0) {
7712                int end = Selection.getSelectionEnd(buf);
7713                invalidateCursor(end, oldStart, newStart);
7714            }
7715        }
7716
7717        if (selChanged) {
7718            if ((buf.getSpanFlags(what)&Spanned.SPAN_INTERMEDIATE) == 0) {
7719                if (newSelStart < 0) {
7720                    newSelStart = Selection.getSelectionStart(buf);
7721                }
7722                if (newSelEnd < 0) {
7723                    newSelEnd = Selection.getSelectionEnd(buf);
7724                }
7725                onSelectionChanged(newSelStart, newSelEnd);
7726            }
7727        }
7728
7729        if (what instanceof UpdateAppearance || what instanceof ParagraphStyle) {
7730            if (ims == null || ims.mBatchEditNesting == 0) {
7731                invalidate();
7732                mHighlightPathBogus = true;
7733                checkForResize();
7734            } else {
7735                ims.mContentChanged = true;
7736            }
7737        }
7738
7739        if (MetaKeyKeyListener.isMetaTracker(buf, what)) {
7740            mHighlightPathBogus = true;
7741            if (ims != null && MetaKeyKeyListener.isSelectingMetaTracker(buf, what)) {
7742                ims.mSelectionModeChanged = true;
7743            }
7744
7745            if (Selection.getSelectionStart(buf) >= 0) {
7746                if (ims == null || ims.mBatchEditNesting == 0) {
7747                    invalidateCursor();
7748                } else {
7749                    ims.mCursorChanged = true;
7750                }
7751            }
7752        }
7753
7754        if (what instanceof ParcelableSpan) {
7755            // If this is a span that can be sent to a remote process,
7756            // the current extract editor would be interested in it.
7757            if (ims != null && ims.mExtracting != null) {
7758                if (ims.mBatchEditNesting != 0) {
7759                    if (oldStart >= 0) {
7760                        if (ims.mChangedStart > oldStart) {
7761                            ims.mChangedStart = oldStart;
7762                        }
7763                        if (ims.mChangedStart > oldEnd) {
7764                            ims.mChangedStart = oldEnd;
7765                        }
7766                    }
7767                    if (newStart >= 0) {
7768                        if (ims.mChangedStart > newStart) {
7769                            ims.mChangedStart = newStart;
7770                        }
7771                        if (ims.mChangedStart > newEnd) {
7772                            ims.mChangedStart = newEnd;
7773                        }
7774                    }
7775                } else {
7776                    if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Span change outside of batch: "
7777                            + oldStart + "-" + oldEnd + ","
7778                            + newStart + "-" + newEnd + what);
7779                    ims.mContentChanged = true;
7780                }
7781            }
7782        }
7783
7784        if (newStart < 0 && what instanceof SpellCheckSpan) {
7785            getSpellChecker().removeSpellCheckSpan((SpellCheckSpan) what);
7786        }
7787    }
7788
7789    /**
7790     * Create new SpellCheckSpans on the modified region.
7791     */
7792    private void updateSpellCheckSpans(int start, int end) {
7793        if (isTextEditable() && isSuggestionsEnabled()) {
7794            getSpellChecker().spellCheck(start, end);
7795        }
7796    }
7797
7798    /**
7799     * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related
7800     * pop-up should be displayed.
7801     */
7802    private class EasyEditSpanController {
7803
7804        private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs
7805
7806        private EasyEditPopupWindow mPopupWindow;
7807
7808        private EasyEditSpan mEasyEditSpan;
7809
7810        private Runnable mHidePopup;
7811
7812        private void hide() {
7813            if (mPopupWindow != null) {
7814                mPopupWindow.hide();
7815                TextView.this.removeCallbacks(mHidePopup);
7816            }
7817            removeSpans(mText);
7818            mEasyEditSpan = null;
7819        }
7820
7821        /**
7822         * Monitors the changes in the text.
7823         *
7824         * <p>{@link ChangeWatcher#onSpanAdded(Spannable, Object, int, int)} cannot be used,
7825         * as the notifications are not sent when a spannable (with spans) is inserted.
7826         */
7827        public void onTextChange(CharSequence buffer) {
7828            adjustSpans(mText);
7829
7830            if (getWindowVisibility() != View.VISIBLE) {
7831                // The window is not visible yet, ignore the text change.
7832                return;
7833            }
7834
7835            if (mLayout == null) {
7836                // The view has not been layout yet, ignore the text change
7837                return;
7838            }
7839
7840            InputMethodManager imm = InputMethodManager.peekInstance();
7841            if (!(TextView.this instanceof ExtractEditText)
7842                    && imm != null && imm.isFullscreenMode()) {
7843                // The input is in extract mode. We do not have to handle the easy edit in the
7844                // original TextView, as the ExtractEditText will do
7845                return;
7846            }
7847
7848            // Remove the current easy edit span, as the text changed, and remove the pop-up
7849            // (if any)
7850            if (mEasyEditSpan != null) {
7851                if (mText instanceof Spannable) {
7852                    ((Spannable) mText).removeSpan(mEasyEditSpan);
7853                }
7854                mEasyEditSpan = null;
7855            }
7856            if (mPopupWindow != null && mPopupWindow.isShowing()) {
7857                mPopupWindow.hide();
7858            }
7859
7860            // Display the new easy edit span (if any).
7861            if (buffer instanceof Spanned) {
7862                mEasyEditSpan = getSpan((Spanned) buffer);
7863                if (mEasyEditSpan != null) {
7864                    if (mPopupWindow == null) {
7865                        mPopupWindow = new EasyEditPopupWindow();
7866                        mHidePopup = new Runnable() {
7867                            @Override
7868                            public void run() {
7869                                hide();
7870                            }
7871                        };
7872                    }
7873                    mPopupWindow.show(mEasyEditSpan);
7874                    TextView.this.removeCallbacks(mHidePopup);
7875                    TextView.this.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS);
7876                }
7877            }
7878        }
7879
7880        /**
7881         * Adjusts the spans by removing all of them except the last one.
7882         */
7883        private void adjustSpans(CharSequence buffer) {
7884            // This method enforces that only one easy edit span is attached to the text.
7885            // A better way to enforce this would be to listen for onSpanAdded, but this method
7886            // cannot be used in this scenario as no notification is triggered when a text with
7887            // spans is inserted into a text.
7888            if (buffer instanceof Spannable) {
7889                Spannable spannable = (Spannable) buffer;
7890                EasyEditSpan[] spans = spannable.getSpans(0, spannable.length(),
7891                        EasyEditSpan.class);
7892                for (int i = 0; i < spans.length - 1; i++) {
7893                    spannable.removeSpan(spans[i]);
7894                }
7895            }
7896        }
7897
7898        /**
7899         * Removes all the {@link EasyEditSpan} currently attached.
7900         */
7901        private void removeSpans(CharSequence buffer) {
7902            if (buffer instanceof Spannable) {
7903                Spannable spannable = (Spannable) buffer;
7904                EasyEditSpan[] spans = spannable.getSpans(0, spannable.length(),
7905                        EasyEditSpan.class);
7906                for (int i = 0; i < spans.length; i++) {
7907                    spannable.removeSpan(spans[i]);
7908                }
7909            }
7910        }
7911
7912        private EasyEditSpan getSpan(Spanned spanned) {
7913            EasyEditSpan[] easyEditSpans = spanned.getSpans(0, spanned.length(),
7914                    EasyEditSpan.class);
7915            if (easyEditSpans.length == 0) {
7916                return null;
7917            } else {
7918                return easyEditSpans[0];
7919            }
7920        }
7921    }
7922
7923    /**
7924     * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled
7925     * by {@link EasyEditSpanController}.
7926     */
7927    private class EasyEditPopupWindow extends PinnedPopupWindow
7928            implements OnClickListener {
7929        private static final int POPUP_TEXT_LAYOUT =
7930                com.android.internal.R.layout.text_edit_action_popup_text;
7931        private TextView mDeleteTextView;
7932        private EasyEditSpan mEasyEditSpan;
7933
7934        @Override
7935        protected void createPopupWindow() {
7936            mPopupWindow = new PopupWindow(TextView.this.mContext, null,
7937                    com.android.internal.R.attr.textSelectHandleWindowStyle);
7938            mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
7939            mPopupWindow.setClippingEnabled(true);
7940        }
7941
7942        @Override
7943        protected void initContentView() {
7944            LinearLayout linearLayout = new LinearLayout(TextView.this.getContext());
7945            linearLayout.setOrientation(LinearLayout.HORIZONTAL);
7946            mContentView = linearLayout;
7947            mContentView.setBackgroundResource(
7948                    com.android.internal.R.drawable.text_edit_side_paste_window);
7949
7950            LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
7951                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
7952
7953            LayoutParams wrapContent = new LayoutParams(
7954                    ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
7955
7956            mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
7957            mDeleteTextView.setLayoutParams(wrapContent);
7958            mDeleteTextView.setText(com.android.internal.R.string.delete);
7959            mDeleteTextView.setOnClickListener(this);
7960            mContentView.addView(mDeleteTextView);
7961        }
7962
7963        public void show(EasyEditSpan easyEditSpan) {
7964            mEasyEditSpan = easyEditSpan;
7965            super.show();
7966        }
7967
7968        @Override
7969        public void onClick(View view) {
7970            if (view == mDeleteTextView) {
7971                Editable editable = (Editable) mText;
7972                int start = editable.getSpanStart(mEasyEditSpan);
7973                int end = editable.getSpanEnd(mEasyEditSpan);
7974                if (start >= 0 && end >= 0) {
7975                    deleteText_internal(start, end);
7976                }
7977            }
7978        }
7979
7980        @Override
7981        protected int getTextOffset() {
7982            // Place the pop-up at the end of the span
7983            Editable editable = (Editable) mText;
7984            return editable.getSpanEnd(mEasyEditSpan);
7985        }
7986
7987        @Override
7988        protected int getVerticalLocalPosition(int line) {
7989            return mLayout.getLineBottom(line);
7990        }
7991
7992        @Override
7993        protected int clipVertically(int positionY) {
7994            // As we display the pop-up below the span, no vertical clipping is required.
7995            return positionY;
7996        }
7997    }
7998
7999    private class ChangeWatcher implements TextWatcher, SpanWatcher {
8000
8001        private CharSequence mBeforeText;
8002
8003        private EasyEditSpanController mEasyEditSpanController;
8004
8005        private ChangeWatcher() {
8006            mEasyEditSpanController = new EasyEditSpanController();
8007        }
8008
8009        public void beforeTextChanged(CharSequence buffer, int start,
8010                                      int before, int after) {
8011            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "beforeTextChanged start=" + start
8012                    + " before=" + before + " after=" + after + ": " + buffer);
8013
8014            if (AccessibilityManager.getInstance(mContext).isEnabled()
8015                    && !isPasswordInputType(mInputType)
8016                    && !hasPasswordTransformationMethod()) {
8017                mBeforeText = buffer.toString();
8018            }
8019
8020            TextView.this.sendBeforeTextChanged(buffer, start, before, after);
8021        }
8022
8023        public void onTextChanged(CharSequence buffer, int start,
8024                                  int before, int after) {
8025            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onTextChanged start=" + start
8026                    + " before=" + before + " after=" + after + ": " + buffer);
8027            TextView.this.handleTextChanged(buffer, start, before, after);
8028
8029            mEasyEditSpanController.onTextChange(buffer);
8030
8031            if (AccessibilityManager.getInstance(mContext).isEnabled() &&
8032                    (isFocused() || isSelected() && isShown())) {
8033                sendAccessibilityEventTypeViewTextChanged(mBeforeText, start, before, after);
8034                mBeforeText = null;
8035            }
8036        }
8037
8038        public void afterTextChanged(Editable buffer) {
8039            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "afterTextChanged: " + buffer);
8040            TextView.this.sendAfterTextChanged(buffer);
8041
8042            if (MetaKeyKeyListener.getMetaState(buffer, MetaKeyKeyListener.META_SELECTING) != 0) {
8043                MetaKeyKeyListener.stopSelecting(TextView.this, buffer);
8044            }
8045        }
8046
8047        public void onSpanChanged(Spannable buf,
8048                                  Object what, int s, int e, int st, int en) {
8049            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanChanged s=" + s + " e=" + e
8050                    + " st=" + st + " en=" + en + " what=" + what + ": " + buf);
8051            TextView.this.spanChange(buf, what, s, st, e, en);
8052        }
8053
8054        public void onSpanAdded(Spannable buf, Object what, int s, int e) {
8055            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanAdded s=" + s + " e=" + e
8056                    + " what=" + what + ": " + buf);
8057            TextView.this.spanChange(buf, what, -1, s, -1, e);
8058        }
8059
8060        public void onSpanRemoved(Spannable buf, Object what, int s, int e) {
8061            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanRemoved s=" + s + " e=" + e
8062                    + " what=" + what + ": " + buf);
8063            TextView.this.spanChange(buf, what, s, -1, e, -1);
8064        }
8065
8066        private void hideControllers() {
8067            mEasyEditSpanController.hide();
8068        }
8069    }
8070
8071    /**
8072     * @hide
8073     */
8074    @Override
8075    public void dispatchFinishTemporaryDetach() {
8076        mDispatchTemporaryDetach = true;
8077        super.dispatchFinishTemporaryDetach();
8078        mDispatchTemporaryDetach = false;
8079    }
8080
8081    @Override
8082    public void onStartTemporaryDetach() {
8083        super.onStartTemporaryDetach();
8084        // Only track when onStartTemporaryDetach() is called directly,
8085        // usually because this instance is an editable field in a list
8086        if (!mDispatchTemporaryDetach) mTemporaryDetach = true;
8087
8088        // Because of View recycling in ListView, there is no easy way to know when a TextView with
8089        // selection becomes visible again. Until a better solution is found, stop text selection
8090        // mode (if any) as soon as this TextView is recycled.
8091        hideControllers();
8092    }
8093
8094    @Override
8095    public void onFinishTemporaryDetach() {
8096        super.onFinishTemporaryDetach();
8097        // Only track when onStartTemporaryDetach() is called directly,
8098        // usually because this instance is an editable field in a list
8099        if (!mDispatchTemporaryDetach) mTemporaryDetach = false;
8100    }
8101
8102    @Override
8103    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
8104        if (mTemporaryDetach) {
8105            // If we are temporarily in the detach state, then do nothing.
8106            super.onFocusChanged(focused, direction, previouslyFocusedRect);
8107            return;
8108        }
8109
8110        mShowCursor = SystemClock.uptimeMillis();
8111
8112        ensureEndedBatchEdit();
8113
8114        if (focused) {
8115            int selStart = getSelectionStart();
8116            int selEnd = getSelectionEnd();
8117
8118            // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection
8119            // mode for these, unless there was a specific selection already started.
8120            final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 &&
8121                    selEnd == mText.length();
8122            mCreatedWithASelection = mFrozenWithFocus && hasSelection() && !isFocusHighlighted;
8123
8124            if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) {
8125                // If a tap was used to give focus to that view, move cursor at tap position.
8126                // Has to be done before onTakeFocus, which can be overloaded.
8127                final int lastTapPosition = getLastTapPosition();
8128                if (lastTapPosition >= 0) {
8129                    Selection.setSelection((Spannable) mText, lastTapPosition);
8130                }
8131
8132                if (mMovement != null) {
8133                    mMovement.onTakeFocus(this, (Spannable) mText, direction);
8134                }
8135
8136                // The DecorView does not have focus when the 'Done' ExtractEditText button is
8137                // pressed. Since it is the ViewAncestor's mView, it requests focus before
8138                // ExtractEditText clears focus, which gives focus to the ExtractEditText.
8139                // This special case ensure that we keep current selection in that case.
8140                // It would be better to know why the DecorView does not have focus at that time.
8141                if (((this instanceof ExtractEditText) || mSelectionMoved) &&
8142                        selStart >= 0 && selEnd >= 0) {
8143                    /*
8144                     * Someone intentionally set the selection, so let them
8145                     * do whatever it is that they wanted to do instead of
8146                     * the default on-focus behavior.  We reset the selection
8147                     * here instead of just skipping the onTakeFocus() call
8148                     * because some movement methods do something other than
8149                     * just setting the selection in theirs and we still
8150                     * need to go through that path.
8151                     */
8152                    Selection.setSelection((Spannable) mText, selStart, selEnd);
8153                }
8154
8155                if (mSelectAllOnFocus) {
8156                    selectAll();
8157                }
8158
8159                mTouchFocusSelected = true;
8160            }
8161
8162            mFrozenWithFocus = false;
8163            mSelectionMoved = false;
8164
8165            if (mText instanceof Spannable) {
8166                Spannable sp = (Spannable) mText;
8167                MetaKeyKeyListener.resetMetaState(sp);
8168            }
8169
8170            makeBlink();
8171
8172            if (mError != null) {
8173                showError();
8174            }
8175        } else {
8176            if (mError != null) {
8177                hideError();
8178            }
8179            // Don't leave us in the middle of a batch edit.
8180            onEndBatchEdit();
8181
8182            if (this instanceof ExtractEditText) {
8183                // terminateTextSelectionMode removes selection, which we want to keep when
8184                // ExtractEditText goes out of focus.
8185                final int selStart = getSelectionStart();
8186                final int selEnd = getSelectionEnd();
8187                hideControllers();
8188                Selection.setSelection((Spannable) mText, selStart, selEnd);
8189            } else {
8190                hideControllers();
8191                downgradeEasyCorrectionSpans();
8192            }
8193
8194            // No need to create the controller
8195            if (mSelectionModifierCursorController != null) {
8196                mSelectionModifierCursorController.resetTouchOffsets();
8197            }
8198        }
8199
8200        startStopMarquee(focused);
8201
8202        if (mTransformation != null) {
8203            mTransformation.onFocusChanged(this, mText, focused, direction, previouslyFocusedRect);
8204        }
8205
8206        super.onFocusChanged(focused, direction, previouslyFocusedRect);
8207    }
8208
8209    private int getLastTapPosition() {
8210        // No need to create the controller at that point, no last tap position saved
8211        if (mSelectionModifierCursorController != null) {
8212            int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset();
8213            if (lastTapPosition >= 0) {
8214                // Safety check, should not be possible.
8215                if (lastTapPosition > mText.length()) {
8216                    Log.e(LOG_TAG, "Invalid tap focus position (" + lastTapPosition + " vs "
8217                            + mText.length() + ")");
8218                    lastTapPosition = mText.length();
8219                }
8220                return lastTapPosition;
8221            }
8222        }
8223
8224        return -1;
8225    }
8226
8227    @Override
8228    public void onWindowFocusChanged(boolean hasWindowFocus) {
8229        super.onWindowFocusChanged(hasWindowFocus);
8230
8231        if (hasWindowFocus) {
8232            if (mBlink != null) {
8233                mBlink.uncancel();
8234                makeBlink();
8235            }
8236        } else {
8237            if (mBlink != null) {
8238                mBlink.cancel();
8239            }
8240            // Don't leave us in the middle of a batch edit.
8241            onEndBatchEdit();
8242            if (mInputContentType != null) {
8243                mInputContentType.enterDown = false;
8244            }
8245
8246            hideControllers();
8247            if (mSuggestionsPopupWindow != null) {
8248                mSuggestionsPopupWindow.onParentLostFocus();
8249            }
8250        }
8251
8252        startStopMarquee(hasWindowFocus);
8253    }
8254
8255    @Override
8256    protected void onVisibilityChanged(View changedView, int visibility) {
8257        super.onVisibilityChanged(changedView, visibility);
8258        if (visibility != VISIBLE) {
8259            hideControllers();
8260        }
8261    }
8262
8263    /**
8264     * Use {@link BaseInputConnection#removeComposingSpans
8265     * BaseInputConnection.removeComposingSpans()} to remove any IME composing
8266     * state from this text view.
8267     */
8268    public void clearComposingText() {
8269        if (mText instanceof Spannable) {
8270            BaseInputConnection.removeComposingSpans((Spannable)mText);
8271        }
8272    }
8273
8274    @Override
8275    public void setSelected(boolean selected) {
8276        boolean wasSelected = isSelected();
8277
8278        super.setSelected(selected);
8279
8280        if (selected != wasSelected && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
8281            if (selected) {
8282                startMarquee();
8283            } else {
8284                stopMarquee();
8285            }
8286        }
8287    }
8288
8289    @Override
8290    public boolean onTouchEvent(MotionEvent event) {
8291        final int action = event.getActionMasked();
8292
8293        if (hasSelectionController()) {
8294            getSelectionController().onTouchEvent(event);
8295        }
8296
8297        if (action == MotionEvent.ACTION_DOWN) {
8298            mLastDownPositionX = event.getX();
8299            mLastDownPositionY = event.getY();
8300
8301            // Reset this state; it will be re-set if super.onTouchEvent
8302            // causes focus to move to the view.
8303            mTouchFocusSelected = false;
8304            mIgnoreActionUpEvent = false;
8305        }
8306
8307        final boolean superResult = super.onTouchEvent(event);
8308
8309        /*
8310         * Don't handle the release after a long press, because it will
8311         * move the selection away from whatever the menu action was
8312         * trying to affect.
8313         */
8314        if (mDiscardNextActionUp && action == MotionEvent.ACTION_UP) {
8315            mDiscardNextActionUp = false;
8316            return superResult;
8317        }
8318
8319        final boolean touchIsFinished = (action == MotionEvent.ACTION_UP) &&
8320                !shouldIgnoreActionUpEvent() && isFocused();
8321
8322         if ((mMovement != null || onCheckIsTextEditor()) && isEnabled()
8323                && mText instanceof Spannable && mLayout != null) {
8324            boolean handled = false;
8325
8326            if (mMovement != null) {
8327                handled |= mMovement.onTouchEvent(this, (Spannable) mText, event);
8328            }
8329
8330            if (touchIsFinished && mLinksClickable && mAutoLinkMask != 0 && mTextIsSelectable) {
8331                // The LinkMovementMethod which should handle taps on links has not been installed
8332                // on non editable text that support text selection.
8333                // We reproduce its behavior here to open links for these.
8334                ClickableSpan[] links = ((Spannable) mText).getSpans(getSelectionStart(),
8335                        getSelectionEnd(), ClickableSpan.class);
8336
8337                if (links.length != 0) {
8338                    links[0].onClick(this);
8339                    handled = true;
8340                }
8341            }
8342
8343            if (touchIsFinished && (isTextEditable() || mTextIsSelectable)) {
8344                // Show the IME, except when selecting in read-only text.
8345                final InputMethodManager imm = InputMethodManager.peekInstance();
8346                viewClicked(imm);
8347                if (!mTextIsSelectable && mSoftInputShownOnFocus) {
8348                    handled |= imm != null && imm.showSoftInput(this, 0);
8349                }
8350
8351                boolean selectAllGotFocus = mSelectAllOnFocus && didTouchFocusSelect();
8352                hideControllers();
8353                if (!selectAllGotFocus && mText.length() > 0) {
8354                    if (mSpellChecker != null) {
8355                        // When the cursor moves, the word that was typed may need spell check
8356                        mSpellChecker.onSelectionChanged();
8357                    }
8358                    if (!extractedTextModeWillBeStarted()) {
8359                        if (isCursorInsideEasyCorrectionSpan()) {
8360                            showSuggestions();
8361                        } else if (hasInsertionController()) {
8362                            getInsertionController().show();
8363                        }
8364                    }
8365                }
8366
8367                handled = true;
8368            }
8369
8370            if (handled) {
8371                return true;
8372            }
8373        }
8374
8375        return superResult;
8376    }
8377
8378    /**
8379     * @return <code>true</code> if the cursor/current selection overlaps a {@link SuggestionSpan}.
8380     */
8381    private boolean isCursorInsideSuggestionSpan() {
8382        if (!(mText instanceof Spannable)) return false;
8383
8384        SuggestionSpan[] suggestionSpans = ((Spannable) mText).getSpans(getSelectionStart(),
8385                getSelectionEnd(), SuggestionSpan.class);
8386        return (suggestionSpans.length > 0);
8387    }
8388
8389    /**
8390     * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with
8391     * {@link SuggestionSpan#FLAG_EASY_CORRECT} set.
8392     */
8393    private boolean isCursorInsideEasyCorrectionSpan() {
8394        Spannable spannable = (Spannable) mText;
8395        SuggestionSpan[] suggestionSpans = spannable.getSpans(getSelectionStart(),
8396                getSelectionEnd(), SuggestionSpan.class);
8397        for (int i = 0; i < suggestionSpans.length; i++) {
8398            if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) {
8399                return true;
8400            }
8401        }
8402        return false;
8403    }
8404
8405    /**
8406     * Downgrades to simple suggestions all the easy correction spans that are not a spell check
8407     * span.
8408     */
8409    private void downgradeEasyCorrectionSpans() {
8410        if (mText instanceof Spannable) {
8411            Spannable spannable = (Spannable) mText;
8412            SuggestionSpan[] suggestionSpans = spannable.getSpans(0,
8413                    spannable.length(), SuggestionSpan.class);
8414            for (int i = 0; i < suggestionSpans.length; i++) {
8415                int flags = suggestionSpans[i].getFlags();
8416                if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0
8417                        && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) {
8418                    flags &= ~SuggestionSpan.FLAG_EASY_CORRECT;
8419                    suggestionSpans[i].setFlags(flags);
8420                }
8421            }
8422        }
8423    }
8424
8425    @Override
8426    public boolean onGenericMotionEvent(MotionEvent event) {
8427        if (mMovement != null && mText instanceof Spannable && mLayout != null) {
8428            try {
8429                if (mMovement.onGenericMotionEvent(this, (Spannable) mText, event)) {
8430                    return true;
8431                }
8432            } catch (AbstractMethodError ex) {
8433                // onGenericMotionEvent was added to the MovementMethod interface in API 12.
8434                // Ignore its absence in case third party applications implemented the
8435                // interface directly.
8436            }
8437        }
8438        return super.onGenericMotionEvent(event);
8439    }
8440
8441    private void prepareCursorControllers() {
8442        boolean windowSupportsHandles = false;
8443
8444        ViewGroup.LayoutParams params = getRootView().getLayoutParams();
8445        if (params instanceof WindowManager.LayoutParams) {
8446            WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params;
8447            windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW
8448                    || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW;
8449        }
8450
8451        mInsertionControllerEnabled = windowSupportsHandles && isCursorVisible() && mLayout != null;
8452        mSelectionControllerEnabled = windowSupportsHandles && textCanBeSelected() &&
8453                mLayout != null;
8454
8455        if (!mInsertionControllerEnabled) {
8456            hideInsertionPointCursorController();
8457            if (mInsertionPointCursorController != null) {
8458                mInsertionPointCursorController.onDetached();
8459                mInsertionPointCursorController = null;
8460            }
8461        }
8462
8463        if (!mSelectionControllerEnabled) {
8464            stopSelectionActionMode();
8465            if (mSelectionModifierCursorController != null) {
8466                mSelectionModifierCursorController.onDetached();
8467                mSelectionModifierCursorController = null;
8468            }
8469        }
8470    }
8471
8472    /**
8473     * @return True iff this TextView contains a text that can be edited, or if this is
8474     * a selectable TextView.
8475     */
8476    private boolean isTextEditable() {
8477        return mText instanceof Editable && onCheckIsTextEditor() && isEnabled();
8478    }
8479
8480    /**
8481     * Returns true, only while processing a touch gesture, if the initial
8482     * touch down event caused focus to move to the text view and as a result
8483     * its selection changed.  Only valid while processing the touch gesture
8484     * of interest.
8485     */
8486    public boolean didTouchFocusSelect() {
8487        return mTouchFocusSelected;
8488    }
8489
8490    @Override
8491    public void cancelLongPress() {
8492        super.cancelLongPress();
8493        mIgnoreActionUpEvent = true;
8494    }
8495
8496    /**
8497     * This method is only valid during a touch event.
8498     *
8499     * @return true when the ACTION_UP event should be ignored, false otherwise.
8500     *
8501     * @hide
8502     */
8503    public boolean shouldIgnoreActionUpEvent() {
8504        return mIgnoreActionUpEvent;
8505    }
8506
8507    @Override
8508    public boolean onTrackballEvent(MotionEvent event) {
8509        if (mMovement != null && mText instanceof Spannable &&
8510            mLayout != null) {
8511            if (mMovement.onTrackballEvent(this, (Spannable) mText, event)) {
8512                return true;
8513            }
8514        }
8515
8516        return super.onTrackballEvent(event);
8517    }
8518
8519    public void setScroller(Scroller s) {
8520        mScroller = s;
8521    }
8522
8523    private static class Blink extends Handler implements Runnable {
8524        private final WeakReference<TextView> mView;
8525        private boolean mCancelled;
8526
8527        public Blink(TextView v) {
8528            mView = new WeakReference<TextView>(v);
8529        }
8530
8531        public void run() {
8532            if (mCancelled) {
8533                return;
8534            }
8535
8536            removeCallbacks(Blink.this);
8537
8538            TextView tv = mView.get();
8539
8540            if (tv != null && tv.shouldBlink()) {
8541                if (tv.mLayout != null) {
8542                    tv.invalidateCursorPath();
8543                }
8544
8545                postAtTime(this, SystemClock.uptimeMillis() + BLINK);
8546            }
8547        }
8548
8549        void cancel() {
8550            if (!mCancelled) {
8551                removeCallbacks(Blink.this);
8552                mCancelled = true;
8553            }
8554        }
8555
8556        void uncancel() {
8557            mCancelled = false;
8558        }
8559    }
8560
8561    /**
8562     * @return True when the TextView isFocused and has a valid zero-length selection (cursor).
8563     */
8564    private boolean shouldBlink() {
8565        if (!isFocused()) return false;
8566
8567        final int start = getSelectionStart();
8568        if (start < 0) return false;
8569
8570        final int end = getSelectionEnd();
8571        if (end < 0) return false;
8572
8573        return start == end;
8574    }
8575
8576    private void makeBlink() {
8577        if (isCursorVisible()) {
8578            if (shouldBlink()) {
8579                mShowCursor = SystemClock.uptimeMillis();
8580                if (mBlink == null) mBlink = new Blink(this);
8581                mBlink.removeCallbacks(mBlink);
8582                mBlink.postAtTime(mBlink, mShowCursor + BLINK);
8583            }
8584        } else {
8585            if (mBlink != null) mBlink.removeCallbacks(mBlink);
8586        }
8587    }
8588
8589    @Override
8590    protected float getLeftFadingEdgeStrength() {
8591        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
8592        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
8593                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
8594            if (mMarquee != null && !mMarquee.isStopped()) {
8595                final Marquee marquee = mMarquee;
8596                if (marquee.shouldDrawLeftFade()) {
8597                    return marquee.mScroll / getHorizontalFadingEdgeLength();
8598                } else {
8599                    return 0.0f;
8600                }
8601            } else if (getLineCount() == 1) {
8602                final int layoutDirection = getResolvedLayoutDirection();
8603                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8604                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8605                    case Gravity.LEFT:
8606                        return 0.0f;
8607                    case Gravity.RIGHT:
8608                        return (mLayout.getLineRight(0) - (mRight - mLeft) -
8609                                getCompoundPaddingLeft() - getCompoundPaddingRight() -
8610                                mLayout.getLineLeft(0)) / getHorizontalFadingEdgeLength();
8611                    case Gravity.CENTER_HORIZONTAL:
8612                        return 0.0f;
8613                }
8614            }
8615        }
8616        return super.getLeftFadingEdgeStrength();
8617    }
8618
8619    @Override
8620    protected float getRightFadingEdgeStrength() {
8621        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
8622        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
8623                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
8624            if (mMarquee != null && !mMarquee.isStopped()) {
8625                final Marquee marquee = mMarquee;
8626                return (marquee.mMaxFadeScroll - marquee.mScroll) / getHorizontalFadingEdgeLength();
8627            } else if (getLineCount() == 1) {
8628                final int layoutDirection = getResolvedLayoutDirection();
8629                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8630                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8631                    case Gravity.LEFT:
8632                        final int textWidth = (mRight - mLeft) - getCompoundPaddingLeft() -
8633                                getCompoundPaddingRight();
8634                        final float lineWidth = mLayout.getLineWidth(0);
8635                        return (lineWidth - textWidth) / getHorizontalFadingEdgeLength();
8636                    case Gravity.RIGHT:
8637                        return 0.0f;
8638                    case Gravity.CENTER_HORIZONTAL:
8639                    case Gravity.FILL_HORIZONTAL:
8640                        return (mLayout.getLineWidth(0) - ((mRight - mLeft) -
8641                                getCompoundPaddingLeft() - getCompoundPaddingRight())) /
8642                                getHorizontalFadingEdgeLength();
8643                }
8644            }
8645        }
8646        return super.getRightFadingEdgeStrength();
8647    }
8648
8649    @Override
8650    protected int computeHorizontalScrollRange() {
8651        if (mLayout != null) {
8652            return mSingleLine && (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) == Gravity.LEFT ?
8653                    (int) mLayout.getLineWidth(0) : mLayout.getWidth();
8654        }
8655
8656        return super.computeHorizontalScrollRange();
8657    }
8658
8659    @Override
8660    protected int computeVerticalScrollRange() {
8661        if (mLayout != null)
8662            return mLayout.getHeight();
8663
8664        return super.computeVerticalScrollRange();
8665    }
8666
8667    @Override
8668    protected int computeVerticalScrollExtent() {
8669        return getHeight() - getCompoundPaddingTop() - getCompoundPaddingBottom();
8670    }
8671
8672    @Override
8673    public void findViewsWithText(ArrayList<View> outViews, CharSequence searched, int flags) {
8674        super.findViewsWithText(outViews, searched, flags);
8675        if (!outViews.contains(this) && (flags & FIND_VIEWS_WITH_TEXT) != 0
8676                && !TextUtils.isEmpty(searched) && !TextUtils.isEmpty(mText)) {
8677            String searchedLowerCase = searched.toString().toLowerCase();
8678            String textLowerCase = mText.toString().toLowerCase();
8679            if (textLowerCase.contains(searchedLowerCase)) {
8680                outViews.add(this);
8681            }
8682        }
8683    }
8684
8685    public enum BufferType {
8686        NORMAL, SPANNABLE, EDITABLE,
8687    }
8688
8689    /**
8690     * Returns the TextView_textColor attribute from the
8691     * Resources.StyledAttributes, if set, or the TextAppearance_textColor
8692     * from the TextView_textAppearance attribute, if TextView_textColor
8693     * was not set directly.
8694     */
8695    public static ColorStateList getTextColors(Context context, TypedArray attrs) {
8696        ColorStateList colors;
8697        colors = attrs.getColorStateList(com.android.internal.R.styleable.
8698                                         TextView_textColor);
8699
8700        if (colors == null) {
8701            int ap = attrs.getResourceId(com.android.internal.R.styleable.
8702                                         TextView_textAppearance, -1);
8703            if (ap != -1) {
8704                TypedArray appearance;
8705                appearance = context.obtainStyledAttributes(ap,
8706                                            com.android.internal.R.styleable.TextAppearance);
8707                colors = appearance.getColorStateList(com.android.internal.R.styleable.
8708                                                  TextAppearance_textColor);
8709                appearance.recycle();
8710            }
8711        }
8712
8713        return colors;
8714    }
8715
8716    /**
8717     * Returns the default color from the TextView_textColor attribute
8718     * from the AttributeSet, if set, or the default color from the
8719     * TextAppearance_textColor from the TextView_textAppearance attribute,
8720     * if TextView_textColor was not set directly.
8721     */
8722    public static int getTextColor(Context context,
8723                                   TypedArray attrs,
8724                                   int def) {
8725        ColorStateList colors = getTextColors(context, attrs);
8726
8727        if (colors == null) {
8728            return def;
8729        } else {
8730            return colors.getDefaultColor();
8731        }
8732    }
8733
8734    @Override
8735    public boolean onKeyShortcut(int keyCode, KeyEvent event) {
8736        final int filteredMetaState = event.getMetaState() & ~KeyEvent.META_CTRL_MASK;
8737        if (KeyEvent.metaStateHasNoModifiers(filteredMetaState)) {
8738            switch (keyCode) {
8739            case KeyEvent.KEYCODE_A:
8740                if (canSelectText()) {
8741                    return onTextContextMenuItem(ID_SELECT_ALL);
8742                }
8743                break;
8744            case KeyEvent.KEYCODE_X:
8745                if (canCut()) {
8746                    return onTextContextMenuItem(ID_CUT);
8747                }
8748                break;
8749            case KeyEvent.KEYCODE_C:
8750                if (canCopy()) {
8751                    return onTextContextMenuItem(ID_COPY);
8752                }
8753                break;
8754            case KeyEvent.KEYCODE_V:
8755                if (canPaste()) {
8756                    return onTextContextMenuItem(ID_PASTE);
8757                }
8758                break;
8759            }
8760        }
8761        return super.onKeyShortcut(keyCode, event);
8762    }
8763
8764    /**
8765     * Unlike {@link #textCanBeSelected()}, this method is based on the <i>current</i> state of the
8766     * TextView. {@link #textCanBeSelected()} has to be true (this is one of the conditions to have
8767     * a selection controller (see {@link #prepareCursorControllers()}), but this is not sufficient.
8768     */
8769    private boolean canSelectText() {
8770        return hasSelectionController() && mText.length() != 0;
8771    }
8772
8773    /**
8774     * Test based on the <i>intrinsic</i> charateristics of the TextView.
8775     * The text must be spannable and the movement method must allow for arbitary selection.
8776     *
8777     * See also {@link #canSelectText()}.
8778     */
8779    private boolean textCanBeSelected() {
8780        // prepareCursorController() relies on this method.
8781        // If you change this condition, make sure prepareCursorController is called anywhere
8782        // the value of this condition might be changed.
8783        if (mMovement == null || !mMovement.canSelectArbitrarily()) return false;
8784        return isTextEditable() || (mTextIsSelectable && mText instanceof Spannable && isEnabled());
8785    }
8786
8787    private boolean canCut() {
8788        if (hasPasswordTransformationMethod()) {
8789            return false;
8790        }
8791
8792        if (mText.length() > 0 && hasSelection() && mText instanceof Editable && mInput != null) {
8793            return true;
8794        }
8795
8796        return false;
8797    }
8798
8799    private boolean canCopy() {
8800        if (hasPasswordTransformationMethod()) {
8801            return false;
8802        }
8803
8804        if (mText.length() > 0 && hasSelection()) {
8805            return true;
8806        }
8807
8808        return false;
8809    }
8810
8811    private boolean canPaste() {
8812        return (mText instanceof Editable &&
8813                mInput != null &&
8814                getSelectionStart() >= 0 &&
8815                getSelectionEnd() >= 0 &&
8816                ((ClipboardManager)getContext().getSystemService(Context.CLIPBOARD_SERVICE)).
8817                hasPrimaryClip());
8818    }
8819
8820    private static long packRangeInLong(int start, int end) {
8821        return (((long) start) << 32) | end;
8822    }
8823
8824    private static int extractRangeStartFromLong(long range) {
8825        return (int) (range >>> 32);
8826    }
8827
8828    private static int extractRangeEndFromLong(long range) {
8829        return (int) (range & 0x00000000FFFFFFFFL);
8830    }
8831
8832    private boolean selectAll() {
8833        final int length = mText.length();
8834        Selection.setSelection((Spannable) mText, 0, length);
8835        return length > 0;
8836    }
8837
8838    /**
8839     * Adjusts selection to the word under last touch offset.
8840     * Return true if the operation was successfully performed.
8841     */
8842    private boolean selectCurrentWord() {
8843        if (!canSelectText()) {
8844            return false;
8845        }
8846
8847        if (hasPasswordTransformationMethod()) {
8848            // Always select all on a password field.
8849            // Cut/copy menu entries are not available for passwords, but being able to select all
8850            // is however useful to delete or paste to replace the entire content.
8851            return selectAll();
8852        }
8853
8854        int klass = mInputType & InputType.TYPE_MASK_CLASS;
8855        int variation = mInputType & InputType.TYPE_MASK_VARIATION;
8856
8857        // Specific text field types: select the entire text for these
8858        if (klass == InputType.TYPE_CLASS_NUMBER ||
8859                klass == InputType.TYPE_CLASS_PHONE ||
8860                klass == InputType.TYPE_CLASS_DATETIME ||
8861                variation == InputType.TYPE_TEXT_VARIATION_URI ||
8862                variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS ||
8863                variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS ||
8864                variation == InputType.TYPE_TEXT_VARIATION_FILTER) {
8865            return selectAll();
8866        }
8867
8868        long lastTouchOffsets = getLastTouchOffsets();
8869        final int minOffset = extractRangeStartFromLong(lastTouchOffsets);
8870        final int maxOffset = extractRangeEndFromLong(lastTouchOffsets);
8871
8872        // Safety check in case standard touch event handling has been bypassed
8873        if (minOffset < 0 || minOffset >= mText.length()) return false;
8874        if (maxOffset < 0 || maxOffset >= mText.length()) return false;
8875
8876        int selectionStart, selectionEnd;
8877
8878        // If a URLSpan (web address, email, phone...) is found at that position, select it.
8879        URLSpan[] urlSpans = ((Spanned) mText).getSpans(minOffset, maxOffset, URLSpan.class);
8880        if (urlSpans.length >= 1) {
8881            URLSpan urlSpan = urlSpans[0];
8882            selectionStart = ((Spanned) mText).getSpanStart(urlSpan);
8883            selectionEnd = ((Spanned) mText).getSpanEnd(urlSpan);
8884        } else {
8885            final WordIterator wordIterator = getWordIterator();
8886            wordIterator.setCharSequence(mText, minOffset, maxOffset);
8887
8888            selectionStart = wordIterator.getBeginning(minOffset);
8889            if (selectionStart == BreakIterator.DONE) return false;
8890
8891            selectionEnd = wordIterator.getEnd(maxOffset);
8892            if (selectionEnd == BreakIterator.DONE) return false;
8893
8894            if (selectionStart == selectionEnd) {
8895                // Possible when the word iterator does not properly handle the text's language
8896                long range = getCharRange(selectionStart);
8897                selectionStart = extractRangeStartFromLong(range);
8898                selectionEnd = extractRangeEndFromLong(range);
8899            }
8900        }
8901
8902        Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
8903        return selectionEnd > selectionStart;
8904    }
8905
8906    /**
8907     * This is a temporary method. Future versions may support multi-locale text.
8908     *
8909     * @return The locale that should be used for a word iterator and a spell checker
8910     * in this TextView, based on the current spell checker settings,
8911     * the current IME's locale, or the system default locale.
8912     * @hide
8913     */
8914    public Locale getTextServicesLocale() {
8915        Locale locale = Locale.getDefault();
8916        final TextServicesManager textServicesManager = (TextServicesManager)
8917                mContext.getSystemService(Context.TEXT_SERVICES_MANAGER_SERVICE);
8918        final SpellCheckerSubtype subtype = textServicesManager.getCurrentSpellCheckerSubtype(true);
8919        if (subtype != null) {
8920            locale = new Locale(subtype.getLocale());
8921        }
8922        return locale;
8923    }
8924
8925    void onLocaleChanged() {
8926        // Will be re-created on demand in getWordIterator with the proper new locale
8927        mWordIterator = null;
8928    }
8929
8930    /**
8931     * @hide
8932     */
8933    public WordIterator getWordIterator() {
8934        if (mWordIterator == null) {
8935            mWordIterator = new WordIterator(getTextServicesLocale());
8936        }
8937        return mWordIterator;
8938    }
8939
8940    private long getCharRange(int offset) {
8941        final int textLength = mText.length();
8942        if (offset + 1 < textLength) {
8943            final char currentChar = mText.charAt(offset);
8944            final char nextChar = mText.charAt(offset + 1);
8945            if (Character.isSurrogatePair(currentChar, nextChar)) {
8946                return packRangeInLong(offset,  offset + 2);
8947            }
8948        }
8949        if (offset < textLength) {
8950            return packRangeInLong(offset,  offset + 1);
8951        }
8952        if (offset - 2 >= 0) {
8953            final char previousChar = mText.charAt(offset - 1);
8954            final char previousPreviousChar = mText.charAt(offset - 2);
8955            if (Character.isSurrogatePair(previousPreviousChar, previousChar)) {
8956                return packRangeInLong(offset - 2,  offset);
8957            }
8958        }
8959        if (offset - 1 >= 0) {
8960            return packRangeInLong(offset - 1,  offset);
8961        }
8962        return packRangeInLong(offset,  offset);
8963    }
8964
8965    private SpellChecker getSpellChecker() {
8966        if (mSpellChecker == null) {
8967            mSpellChecker = new SpellChecker(this);
8968        }
8969        return mSpellChecker;
8970    }
8971
8972    private long getLastTouchOffsets() {
8973        SelectionModifierCursorController selectionController = getSelectionController();
8974        final int minOffset = selectionController.getMinTouchOffset();
8975        final int maxOffset = selectionController.getMaxTouchOffset();
8976        return packRangeInLong(minOffset, maxOffset);
8977    }
8978
8979    @Override
8980    public void onPopulateAccessibilityEvent(AccessibilityEvent event) {
8981        super.onPopulateAccessibilityEvent(event);
8982
8983        final boolean isPassword = hasPasswordTransformationMethod();
8984        if (!isPassword) {
8985            CharSequence text = getTextForAccessibility();
8986            if (!TextUtils.isEmpty(text)) {
8987                event.getText().add(text);
8988            }
8989        }
8990    }
8991
8992    @Override
8993    public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
8994        super.onInitializeAccessibilityEvent(event);
8995
8996        final boolean isPassword = hasPasswordTransformationMethod();
8997        event.setPassword(isPassword);
8998
8999        if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED) {
9000            event.setFromIndex(Selection.getSelectionStart(mText));
9001            event.setToIndex(Selection.getSelectionEnd(mText));
9002            event.setItemCount(mText.length());
9003        }
9004    }
9005
9006    @Override
9007    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
9008        super.onInitializeAccessibilityNodeInfo(info);
9009
9010        final boolean isPassword = hasPasswordTransformationMethod();
9011        if (!isPassword) {
9012            info.setText(getTextForAccessibility());
9013        }
9014        info.setPassword(isPassword);
9015    }
9016
9017    @Override
9018    public void sendAccessibilityEvent(int eventType) {
9019        // Do not send scroll events since first they are not interesting for
9020        // accessibility and second such events a generated too frequently.
9021        // For details see the implementation of bringTextIntoView().
9022        if (eventType == AccessibilityEvent.TYPE_VIEW_SCROLLED) {
9023            return;
9024        }
9025        super.sendAccessibilityEvent(eventType);
9026    }
9027
9028    /**
9029     * Gets the text reported for accessibility purposes. It is the
9030     * text if not empty or the hint.
9031     *
9032     * @return The accessibility text.
9033     */
9034    private CharSequence getTextForAccessibility() {
9035        CharSequence text = getText();
9036        if (TextUtils.isEmpty(text)) {
9037            text = getHint();
9038        }
9039        return text;
9040    }
9041
9042    void sendAccessibilityEventTypeViewTextChanged(CharSequence beforeText,
9043            int fromIndex, int removedCount, int addedCount) {
9044        AccessibilityEvent event =
9045            AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
9046        event.setFromIndex(fromIndex);
9047        event.setRemovedCount(removedCount);
9048        event.setAddedCount(addedCount);
9049        event.setBeforeText(beforeText);
9050        sendAccessibilityEventUnchecked(event);
9051    }
9052
9053    /**
9054     * Returns whether this text view is a current input method target.  The
9055     * default implementation just checks with {@link InputMethodManager}.
9056     */
9057    public boolean isInputMethodTarget() {
9058        InputMethodManager imm = InputMethodManager.peekInstance();
9059        return imm != null && imm.isActive(this);
9060    }
9061
9062    // Selection context mode
9063    private static final int ID_SELECT_ALL = android.R.id.selectAll;
9064    private static final int ID_CUT = android.R.id.cut;
9065    private static final int ID_COPY = android.R.id.copy;
9066    private static final int ID_PASTE = android.R.id.paste;
9067
9068    /**
9069     * Called when a context menu option for the text view is selected.  Currently
9070     * this will be one of {@link android.R.id#selectAll}, {@link android.R.id#cut},
9071     * {@link android.R.id#copy} or {@link android.R.id#paste}.
9072     *
9073     * @return true if the context menu item action was performed.
9074     */
9075    public boolean onTextContextMenuItem(int id) {
9076        int min = 0;
9077        int max = mText.length();
9078
9079        if (isFocused()) {
9080            final int selStart = getSelectionStart();
9081            final int selEnd = getSelectionEnd();
9082
9083            min = Math.max(0, Math.min(selStart, selEnd));
9084            max = Math.max(0, Math.max(selStart, selEnd));
9085        }
9086
9087        switch (id) {
9088            case ID_SELECT_ALL:
9089                // This does not enter text selection mode. Text is highlighted, so that it can be
9090                // bulk edited, like selectAllOnFocus does. Returns true even if text is empty.
9091                selectAll();
9092                return true;
9093
9094            case ID_PASTE:
9095                paste(min, max);
9096                return true;
9097
9098            case ID_CUT:
9099                setPrimaryClip(ClipData.newPlainText(null, getTransformedText(min, max)));
9100                deleteText_internal(min, max);
9101                stopSelectionActionMode();
9102                return true;
9103
9104            case ID_COPY:
9105                setPrimaryClip(ClipData.newPlainText(null, getTransformedText(min, max)));
9106                stopSelectionActionMode();
9107                return true;
9108        }
9109        return false;
9110    }
9111
9112    private CharSequence getTransformedText(int start, int end) {
9113        return removeSuggestionSpans(mTransformed.subSequence(start, end));
9114    }
9115
9116    /**
9117     * Prepare text so that there are not zero or two spaces at beginning and end of region defined
9118     * by [min, max] when replacing this region by paste.
9119     * Note that if there were two spaces (or more) at that position before, they are kept. We just
9120     * make sure we do not add an extra one from the paste content.
9121     */
9122    private long prepareSpacesAroundPaste(int min, int max, CharSequence paste) {
9123        if (paste.length() > 0) {
9124            if (min > 0) {
9125                final char charBefore = mTransformed.charAt(min - 1);
9126                final char charAfter = paste.charAt(0);
9127
9128                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
9129                    // Two spaces at beginning of paste: remove one
9130                    final int originalLength = mText.length();
9131                    deleteText_internal(min - 1, min);
9132                    // Due to filters, there is no guarantee that exactly one character was
9133                    // removed: count instead.
9134                    final int delta = mText.length() - originalLength;
9135                    min += delta;
9136                    max += delta;
9137                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
9138                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
9139                    // No space at beginning of paste: add one
9140                    final int originalLength = mText.length();
9141                    replaceText_internal(min, min, " ");
9142                    // Taking possible filters into account as above.
9143                    final int delta = mText.length() - originalLength;
9144                    min += delta;
9145                    max += delta;
9146                }
9147            }
9148
9149            if (max < mText.length()) {
9150                final char charBefore = paste.charAt(paste.length() - 1);
9151                final char charAfter = mTransformed.charAt(max);
9152
9153                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
9154                    // Two spaces at end of paste: remove one
9155                    deleteText_internal(max, max + 1);
9156                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
9157                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
9158                    // No space at end of paste: add one
9159                    replaceText_internal(max, max, " ");
9160                }
9161            }
9162        }
9163
9164        return packRangeInLong(min, max);
9165    }
9166
9167    private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) {
9168        TextView shadowView = (TextView) inflate(mContext,
9169                com.android.internal.R.layout.text_drag_thumbnail, null);
9170
9171        if (shadowView == null) {
9172            throw new IllegalArgumentException("Unable to inflate text drag thumbnail");
9173        }
9174
9175        if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) {
9176            text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH);
9177        }
9178        shadowView.setText(text);
9179        shadowView.setTextColor(getTextColors());
9180
9181        shadowView.setTextAppearance(mContext, R.styleable.Theme_textAppearanceLarge);
9182        shadowView.setGravity(Gravity.CENTER);
9183
9184        shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
9185                ViewGroup.LayoutParams.WRAP_CONTENT));
9186
9187        final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
9188        shadowView.measure(size, size);
9189
9190        shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight());
9191        shadowView.invalidate();
9192        return new DragShadowBuilder(shadowView);
9193    }
9194
9195    private static class DragLocalState {
9196        public TextView sourceTextView;
9197        public int start, end;
9198
9199        public DragLocalState(TextView sourceTextView, int start, int end) {
9200            this.sourceTextView = sourceTextView;
9201            this.start = start;
9202            this.end = end;
9203        }
9204    }
9205
9206    @Override
9207    public boolean performLongClick() {
9208        boolean handled = false;
9209        boolean vibrate = true;
9210
9211        if (super.performLongClick()) {
9212            mDiscardNextActionUp = true;
9213            handled = true;
9214        }
9215
9216        // Long press in empty space moves cursor and shows the Paste affordance if available.
9217        if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) &&
9218                mInsertionControllerEnabled) {
9219            final int offset = getOffsetForPosition(mLastDownPositionX, mLastDownPositionY);
9220            stopSelectionActionMode();
9221            Selection.setSelection((Spannable) mText, offset);
9222            getInsertionController().showWithActionPopup();
9223            handled = true;
9224            vibrate = false;
9225        }
9226
9227        if (!handled && mSelectionActionMode != null) {
9228            if (touchPositionIsInSelection()) {
9229                // Start a drag
9230                final int start = getSelectionStart();
9231                final int end = getSelectionEnd();
9232                CharSequence selectedText = getTransformedText(start, end);
9233                ClipData data = ClipData.newPlainText(null, selectedText);
9234                DragLocalState localState = new DragLocalState(this, start, end);
9235                startDrag(data, getTextThumbnailBuilder(selectedText), localState, 0);
9236                stopSelectionActionMode();
9237            } else {
9238                getSelectionController().hide();
9239                selectCurrentWord();
9240                getSelectionController().show();
9241            }
9242            handled = true;
9243        }
9244
9245        // Start a new selection
9246        if (!handled) {
9247            vibrate = handled = startSelectionActionMode();
9248        }
9249
9250        if (vibrate) {
9251            performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
9252        }
9253
9254        if (handled) {
9255            mDiscardNextActionUp = true;
9256        }
9257
9258        return handled;
9259    }
9260
9261    private boolean touchPositionIsInSelection() {
9262        int selectionStart = getSelectionStart();
9263        int selectionEnd = getSelectionEnd();
9264
9265        if (selectionStart == selectionEnd) {
9266            return false;
9267        }
9268
9269        if (selectionStart > selectionEnd) {
9270            int tmp = selectionStart;
9271            selectionStart = selectionEnd;
9272            selectionEnd = tmp;
9273            Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
9274        }
9275
9276        SelectionModifierCursorController selectionController = getSelectionController();
9277        int minOffset = selectionController.getMinTouchOffset();
9278        int maxOffset = selectionController.getMaxTouchOffset();
9279
9280        return ((minOffset >= selectionStart) && (maxOffset < selectionEnd));
9281    }
9282
9283    private PositionListener getPositionListener() {
9284        if (mPositionListener == null) {
9285            mPositionListener = new PositionListener();
9286        }
9287        return mPositionListener;
9288    }
9289
9290    private interface TextViewPositionListener {
9291        public void updatePosition(int parentPositionX, int parentPositionY,
9292                boolean parentPositionChanged, boolean parentScrolled);
9293    }
9294
9295    private class PositionListener implements ViewTreeObserver.OnPreDrawListener {
9296        // 3 handles
9297        // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others)
9298        private final int MAXIMUM_NUMBER_OF_LISTENERS = 6;
9299        private TextViewPositionListener[] mPositionListeners =
9300                new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS];
9301        private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS];
9302        private boolean mPositionHasChanged = true;
9303        // Absolute position of the TextView with respect to its parent window
9304        private int mPositionX, mPositionY;
9305        private int mNumberOfListeners;
9306        private boolean mScrollHasChanged;
9307
9308        public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) {
9309            if (mNumberOfListeners == 0) {
9310                updatePosition();
9311                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
9312                vto.addOnPreDrawListener(this);
9313            }
9314
9315            int emptySlotIndex = -1;
9316            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
9317                TextViewPositionListener listener = mPositionListeners[i];
9318                if (listener == positionListener) {
9319                    return;
9320                } else if (emptySlotIndex < 0 && listener == null) {
9321                    emptySlotIndex = i;
9322                }
9323            }
9324
9325            mPositionListeners[emptySlotIndex] = positionListener;
9326            mCanMove[emptySlotIndex] = canMove;
9327            mNumberOfListeners++;
9328        }
9329
9330        public void removeSubscriber(TextViewPositionListener positionListener) {
9331            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
9332                if (mPositionListeners[i] == positionListener) {
9333                    mPositionListeners[i] = null;
9334                    mNumberOfListeners--;
9335                    break;
9336                }
9337            }
9338
9339            if (mNumberOfListeners == 0) {
9340                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
9341                vto.removeOnPreDrawListener(this);
9342            }
9343        }
9344
9345        public int getPositionX() {
9346            return mPositionX;
9347        }
9348
9349        public int getPositionY() {
9350            return mPositionY;
9351        }
9352
9353        @Override
9354        public boolean onPreDraw() {
9355            updatePosition();
9356
9357            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
9358                if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) {
9359                    TextViewPositionListener positionListener = mPositionListeners[i];
9360                    if (positionListener != null) {
9361                        positionListener.updatePosition(mPositionX, mPositionY,
9362                                mPositionHasChanged, mScrollHasChanged);
9363                    }
9364                }
9365            }
9366
9367            mScrollHasChanged = false;
9368            return true;
9369        }
9370
9371        private void updatePosition() {
9372            TextView.this.getLocationInWindow(mTempCoords);
9373
9374            mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY;
9375
9376            mPositionX = mTempCoords[0];
9377            mPositionY = mTempCoords[1];
9378        }
9379
9380        public boolean isVisible(int positionX, int positionY) {
9381            final TextView textView = TextView.this;
9382
9383            if (mTempRect == null) mTempRect = new Rect();
9384            final Rect clip = mTempRect;
9385            clip.left = getCompoundPaddingLeft();
9386            clip.top = getExtendedPaddingTop();
9387            clip.right = textView.getWidth() - getCompoundPaddingRight();
9388            clip.bottom = textView.getHeight() - getExtendedPaddingBottom();
9389
9390            final ViewParent parent = textView.getParent();
9391            if (parent == null || !parent.getChildVisibleRect(textView, clip, null)) {
9392                return false;
9393            }
9394
9395            int posX = mPositionX + positionX;
9396            int posY = mPositionY + positionY;
9397
9398            // Offset by 1 to take into account 0.5 and int rounding around getPrimaryHorizontal.
9399            return posX >= clip.left - 1 && posX <= clip.right + 1 &&
9400                    posY >= clip.top && posY <= clip.bottom;
9401        }
9402
9403        public boolean isOffsetVisible(int offset) {
9404            final int line = mLayout.getLineForOffset(offset);
9405            final int lineBottom = mLayout.getLineBottom(line);
9406            final int primaryHorizontal = (int) mLayout.getPrimaryHorizontal(offset);
9407            return isVisible(primaryHorizontal + viewportToContentHorizontalOffset(),
9408                    lineBottom + viewportToContentVerticalOffset());
9409        }
9410
9411        public void onScrollChanged() {
9412            mScrollHasChanged = true;
9413        }
9414    }
9415
9416    @Override
9417    protected void onScrollChanged(int horiz, int vert, int oldHoriz, int oldVert) {
9418        super.onScrollChanged(horiz, vert, oldHoriz, oldVert);
9419        if (mPositionListener != null) {
9420            mPositionListener.onScrollChanged();
9421        }
9422    }
9423
9424    private abstract class PinnedPopupWindow implements TextViewPositionListener {
9425        protected PopupWindow mPopupWindow;
9426        protected ViewGroup mContentView;
9427        int mPositionX, mPositionY;
9428
9429        protected abstract void createPopupWindow();
9430        protected abstract void initContentView();
9431        protected abstract int getTextOffset();
9432        protected abstract int getVerticalLocalPosition(int line);
9433        protected abstract int clipVertically(int positionY);
9434
9435        public PinnedPopupWindow() {
9436            createPopupWindow();
9437
9438            mPopupWindow.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
9439            mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
9440            mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
9441
9442            initContentView();
9443
9444            LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
9445                    ViewGroup.LayoutParams.WRAP_CONTENT);
9446            mContentView.setLayoutParams(wrapContent);
9447
9448            mPopupWindow.setContentView(mContentView);
9449        }
9450
9451        public void show() {
9452            TextView.this.getPositionListener().addSubscriber(this, false /* offset is fixed */);
9453
9454            computeLocalPosition();
9455
9456            final PositionListener positionListener = TextView.this.getPositionListener();
9457            updatePosition(positionListener.getPositionX(), positionListener.getPositionY());
9458        }
9459
9460        protected void measureContent() {
9461            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9462            mContentView.measure(
9463                    View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels,
9464                            View.MeasureSpec.AT_MOST),
9465                    View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels,
9466                            View.MeasureSpec.AT_MOST));
9467        }
9468
9469        /* The popup window will be horizontally centered on the getTextOffset() and vertically
9470         * positioned according to viewportToContentHorizontalOffset.
9471         *
9472         * This method assumes that mContentView has properly been measured from its content. */
9473        private void computeLocalPosition() {
9474            measureContent();
9475            final int width = mContentView.getMeasuredWidth();
9476            final int offset = getTextOffset();
9477            mPositionX = (int) (mLayout.getPrimaryHorizontal(offset) - width / 2.0f);
9478            mPositionX += viewportToContentHorizontalOffset();
9479
9480            final int line = mLayout.getLineForOffset(offset);
9481            mPositionY = getVerticalLocalPosition(line);
9482            mPositionY += viewportToContentVerticalOffset();
9483        }
9484
9485        private void updatePosition(int parentPositionX, int parentPositionY) {
9486            int positionX = parentPositionX + mPositionX;
9487            int positionY = parentPositionY + mPositionY;
9488
9489            positionY = clipVertically(positionY);
9490
9491            // Horizontal clipping
9492            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9493            final int width = mContentView.getMeasuredWidth();
9494            positionX = Math.min(displayMetrics.widthPixels - width, positionX);
9495            positionX = Math.max(0, positionX);
9496
9497            if (isShowing()) {
9498                mPopupWindow.update(positionX, positionY, -1, -1);
9499            } else {
9500                mPopupWindow.showAtLocation(TextView.this, Gravity.NO_GRAVITY,
9501                        positionX, positionY);
9502            }
9503        }
9504
9505        public void hide() {
9506            mPopupWindow.dismiss();
9507            TextView.this.getPositionListener().removeSubscriber(this);
9508        }
9509
9510        @Override
9511        public void updatePosition(int parentPositionX, int parentPositionY,
9512                boolean parentPositionChanged, boolean parentScrolled) {
9513            // Either parentPositionChanged or parentScrolled is true, check if still visible
9514            if (isShowing() && getPositionListener().isOffsetVisible(getTextOffset())) {
9515                if (parentScrolled) computeLocalPosition();
9516                updatePosition(parentPositionX, parentPositionY);
9517            } else {
9518                hide();
9519            }
9520        }
9521
9522        public boolean isShowing() {
9523            return mPopupWindow.isShowing();
9524        }
9525    }
9526
9527    private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener {
9528        private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE;
9529        private static final int ADD_TO_DICTIONARY = -1;
9530        private static final int DELETE_TEXT = -2;
9531        private SuggestionInfo[] mSuggestionInfos;
9532        private int mNumberOfSuggestions;
9533        private boolean mCursorWasVisibleBeforeSuggestions;
9534        private boolean mIsShowingUp = false;
9535        private SuggestionAdapter mSuggestionsAdapter;
9536        private final Comparator<SuggestionSpan> mSuggestionSpanComparator;
9537        private final HashMap<SuggestionSpan, Integer> mSpansLengths;
9538
9539        private class CustomPopupWindow extends PopupWindow {
9540            public CustomPopupWindow(Context context, int defStyle) {
9541                super(context, null, defStyle);
9542            }
9543
9544            @Override
9545            public void dismiss() {
9546                super.dismiss();
9547
9548                TextView.this.getPositionListener().removeSubscriber(SuggestionsPopupWindow.this);
9549
9550                // Safe cast since show() checks that mText is an Editable
9551                ((Spannable) mText).removeSpan(mSuggestionRangeSpan);
9552
9553                setCursorVisible(mCursorWasVisibleBeforeSuggestions);
9554                if (hasInsertionController()) {
9555                    getInsertionController().show();
9556                }
9557            }
9558        }
9559
9560        public SuggestionsPopupWindow() {
9561            mCursorWasVisibleBeforeSuggestions = mCursorVisible;
9562            mSuggestionSpanComparator = new SuggestionSpanComparator();
9563            mSpansLengths = new HashMap<SuggestionSpan, Integer>();
9564        }
9565
9566        @Override
9567        protected void createPopupWindow() {
9568            mPopupWindow = new CustomPopupWindow(TextView.this.mContext,
9569                com.android.internal.R.attr.textSuggestionsWindowStyle);
9570            mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
9571            mPopupWindow.setFocusable(true);
9572            mPopupWindow.setClippingEnabled(false);
9573        }
9574
9575        @Override
9576        protected void initContentView() {
9577            ListView listView = new ListView(TextView.this.getContext());
9578            mSuggestionsAdapter = new SuggestionAdapter();
9579            listView.setAdapter(mSuggestionsAdapter);
9580            listView.setOnItemClickListener(this);
9581            mContentView = listView;
9582
9583            // Inflate the suggestion items once and for all. + 2 for add to dictionary and delete
9584            mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS + 2];
9585            for (int i = 0; i < mSuggestionInfos.length; i++) {
9586                mSuggestionInfos[i] = new SuggestionInfo();
9587            }
9588        }
9589
9590        public boolean isShowingUp() {
9591            return mIsShowingUp;
9592        }
9593
9594        public void onParentLostFocus() {
9595            mIsShowingUp = false;
9596        }
9597
9598        private class SuggestionInfo {
9599            int suggestionStart, suggestionEnd; // range of actual suggestion within text
9600            SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents
9601            int suggestionIndex; // the index of this suggestion inside suggestionSpan
9602            SpannableStringBuilder text = new SpannableStringBuilder();
9603            TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mContext,
9604                    android.R.style.TextAppearance_SuggestionHighlight);
9605        }
9606
9607        private class SuggestionAdapter extends BaseAdapter {
9608            private LayoutInflater mInflater = (LayoutInflater) TextView.this.mContext.
9609                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
9610
9611            @Override
9612            public int getCount() {
9613                return mNumberOfSuggestions;
9614            }
9615
9616            @Override
9617            public Object getItem(int position) {
9618                return mSuggestionInfos[position];
9619            }
9620
9621            @Override
9622            public long getItemId(int position) {
9623                return position;
9624            }
9625
9626            @Override
9627            public View getView(int position, View convertView, ViewGroup parent) {
9628                TextView textView = (TextView) convertView;
9629
9630                if (textView == null) {
9631                    textView = (TextView) mInflater.inflate(mTextEditSuggestionItemLayout, parent,
9632                            false);
9633                }
9634
9635                final SuggestionInfo suggestionInfo = mSuggestionInfos[position];
9636                textView.setText(suggestionInfo.text);
9637
9638                if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) {
9639                    textView.setCompoundDrawablesWithIntrinsicBounds(
9640                            com.android.internal.R.drawable.ic_suggestions_add, 0, 0, 0);
9641                } else if (suggestionInfo.suggestionIndex == DELETE_TEXT) {
9642                    textView.setCompoundDrawablesWithIntrinsicBounds(
9643                            com.android.internal.R.drawable.ic_suggestions_delete, 0, 0, 0);
9644                } else {
9645                    textView.setCompoundDrawables(null, null, null, null);
9646                }
9647
9648                return textView;
9649            }
9650        }
9651
9652        private class SuggestionSpanComparator implements Comparator<SuggestionSpan> {
9653            public int compare(SuggestionSpan span1, SuggestionSpan span2) {
9654                final int flag1 = span1.getFlags();
9655                final int flag2 = span2.getFlags();
9656                if (flag1 != flag2) {
9657                    // The order here should match what is used in updateDrawState
9658                    final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0;
9659                    final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0;
9660                    final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0;
9661                    final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0;
9662                    if (easy1 && !misspelled1) return -1;
9663                    if (easy2 && !misspelled2) return 1;
9664                    if (misspelled1) return -1;
9665                    if (misspelled2) return 1;
9666                }
9667
9668                return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue();
9669            }
9670        }
9671
9672        /**
9673         * Returns the suggestion spans that cover the current cursor position. The suggestion
9674         * spans are sorted according to the length of text that they are attached to.
9675         */
9676        private SuggestionSpan[] getSuggestionSpans() {
9677            int pos = TextView.this.getSelectionStart();
9678            Spannable spannable = (Spannable) TextView.this.mText;
9679            SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class);
9680
9681            mSpansLengths.clear();
9682            for (SuggestionSpan suggestionSpan : suggestionSpans) {
9683                int start = spannable.getSpanStart(suggestionSpan);
9684                int end = spannable.getSpanEnd(suggestionSpan);
9685                mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start));
9686            }
9687
9688            // The suggestions are sorted according to their types (easy correction first, then
9689            // misspelled) and to the length of the text that they cover (shorter first).
9690            Arrays.sort(suggestionSpans, mSuggestionSpanComparator);
9691            return suggestionSpans;
9692        }
9693
9694        @Override
9695        public void show() {
9696            if (!(mText instanceof Editable)) return;
9697
9698            updateSuggestions();
9699            mCursorWasVisibleBeforeSuggestions = mCursorVisible;
9700            setCursorVisible(false);
9701            mIsShowingUp = true;
9702            super.show();
9703        }
9704
9705        @Override
9706        protected void measureContent() {
9707            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9708            final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec(
9709                    displayMetrics.widthPixels, View.MeasureSpec.AT_MOST);
9710            final int verticalMeasure = View.MeasureSpec.makeMeasureSpec(
9711                    displayMetrics.heightPixels, View.MeasureSpec.AT_MOST);
9712
9713            int width = 0;
9714            View view = null;
9715            for (int i = 0; i < mNumberOfSuggestions; i++) {
9716                view = mSuggestionsAdapter.getView(i, view, mContentView);
9717                view.getLayoutParams().width = LayoutParams.WRAP_CONTENT;
9718                view.measure(horizontalMeasure, verticalMeasure);
9719                width = Math.max(width, view.getMeasuredWidth());
9720            }
9721
9722            // Enforce the width based on actual text widths
9723            mContentView.measure(
9724                    View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY),
9725                    verticalMeasure);
9726
9727            Drawable popupBackground = mPopupWindow.getBackground();
9728            if (popupBackground != null) {
9729                if (mTempRect == null) mTempRect = new Rect();
9730                popupBackground.getPadding(mTempRect);
9731                width += mTempRect.left + mTempRect.right;
9732            }
9733            mPopupWindow.setWidth(width);
9734        }
9735
9736        @Override
9737        protected int getTextOffset() {
9738            return getSelectionStart();
9739        }
9740
9741        @Override
9742        protected int getVerticalLocalPosition(int line) {
9743            return mLayout.getLineBottom(line);
9744        }
9745
9746        @Override
9747        protected int clipVertically(int positionY) {
9748            final int height = mContentView.getMeasuredHeight();
9749            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9750            return Math.min(positionY, displayMetrics.heightPixels - height);
9751        }
9752
9753        @Override
9754        public void hide() {
9755            super.hide();
9756        }
9757
9758        private void updateSuggestions() {
9759            Spannable spannable = (Spannable) TextView.this.mText;
9760            SuggestionSpan[] suggestionSpans = getSuggestionSpans();
9761
9762            final int nbSpans = suggestionSpans.length;
9763
9764            mNumberOfSuggestions = 0;
9765            int spanUnionStart = mText.length();
9766            int spanUnionEnd = 0;
9767
9768            SuggestionSpan misspelledSpan = null;
9769            int underlineColor = 0;
9770
9771            for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) {
9772                SuggestionSpan suggestionSpan = suggestionSpans[spanIndex];
9773                final int spanStart = spannable.getSpanStart(suggestionSpan);
9774                final int spanEnd = spannable.getSpanEnd(suggestionSpan);
9775                spanUnionStart = Math.min(spanStart, spanUnionStart);
9776                spanUnionEnd = Math.max(spanEnd, spanUnionEnd);
9777
9778                if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) {
9779                    misspelledSpan = suggestionSpan;
9780                }
9781
9782                // The first span dictates the background color of the highlighted text
9783                if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor();
9784
9785                String[] suggestions = suggestionSpan.getSuggestions();
9786                int nbSuggestions = suggestions.length;
9787                for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) {
9788                    SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions];
9789                    suggestionInfo.suggestionSpan = suggestionSpan;
9790                    suggestionInfo.suggestionIndex = suggestionIndex;
9791                    suggestionInfo.text.replace(0, suggestionInfo.text.length(),
9792                            suggestions[suggestionIndex]);
9793
9794                    mNumberOfSuggestions++;
9795                    if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) {
9796                        // Also end outer for loop
9797                        spanIndex = nbSpans;
9798                        break;
9799                    }
9800                }
9801            }
9802
9803            for (int i = 0; i < mNumberOfSuggestions; i++) {
9804                highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd);
9805            }
9806
9807            // Add to dictionary item is there a span with the misspelled flag
9808            if (misspelledSpan != null) {
9809                final int misspelledStart = spannable.getSpanStart(misspelledSpan);
9810                final int misspelledEnd = spannable.getSpanEnd(misspelledSpan);
9811                if (misspelledStart >= 0 && misspelledEnd > misspelledStart) {
9812                    SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions];
9813                    suggestionInfo.suggestionSpan = misspelledSpan;
9814                    suggestionInfo.suggestionIndex = ADD_TO_DICTIONARY;
9815                    suggestionInfo.text.replace(0, suggestionInfo.text.length(),
9816                            getContext().getString(com.android.internal.R.string.addToDictionary));
9817                    suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0,
9818                            Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9819
9820                    mNumberOfSuggestions++;
9821                }
9822            }
9823
9824            // Delete item
9825            SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions];
9826            suggestionInfo.suggestionSpan = null;
9827            suggestionInfo.suggestionIndex = DELETE_TEXT;
9828            suggestionInfo.text.replace(0, suggestionInfo.text.length(),
9829                    getContext().getString(com.android.internal.R.string.deleteText));
9830            suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0,
9831                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9832            mNumberOfSuggestions++;
9833
9834            if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan();
9835            if (underlineColor == 0) {
9836                // Fallback on the default highlight color when the first span does not provide one
9837                mSuggestionRangeSpan.setBackgroundColor(mHighlightColor);
9838            } else {
9839                final float BACKGROUND_TRANSPARENCY = 0.4f;
9840                final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY);
9841                mSuggestionRangeSpan.setBackgroundColor(
9842                        (underlineColor & 0x00FFFFFF) + (newAlpha << 24));
9843            }
9844            spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd,
9845                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9846
9847            mSuggestionsAdapter.notifyDataSetChanged();
9848        }
9849
9850        private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart,
9851                int unionEnd) {
9852            final Spannable text = (Spannable) mText;
9853            final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan);
9854            final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan);
9855
9856            // Adjust the start/end of the suggestion span
9857            suggestionInfo.suggestionStart = spanStart - unionStart;
9858            suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart
9859                    + suggestionInfo.text.length();
9860
9861            suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0,
9862                    suggestionInfo.text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9863
9864            // Add the text before and after the span.
9865            suggestionInfo.text.insert(0, mText.toString().substring(unionStart, spanStart));
9866            suggestionInfo.text.append(mText.toString().substring(spanEnd, unionEnd));
9867        }
9868
9869        @Override
9870        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
9871            Editable editable = (Editable) mText;
9872            SuggestionInfo suggestionInfo = mSuggestionInfos[position];
9873
9874            if (suggestionInfo.suggestionIndex == DELETE_TEXT) {
9875                final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan);
9876                int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan);
9877                if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) {
9878                    // Do not leave two adjacent spaces after deletion, or one at beginning of text
9879                    if (spanUnionEnd < editable.length() &&
9880                            Character.isSpaceChar(editable.charAt(spanUnionEnd)) &&
9881                            (spanUnionStart == 0 ||
9882                            Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) {
9883                        spanUnionEnd = spanUnionEnd + 1;
9884                    }
9885                    deleteText_internal(spanUnionStart, spanUnionEnd);
9886                }
9887                hide();
9888                return;
9889            }
9890
9891            final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan);
9892            final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan);
9893            if (spanStart < 0 || spanEnd < 0) {
9894                // Span has been removed
9895                hide();
9896                return;
9897            }
9898            final String originalText = mText.toString().substring(spanStart, spanEnd);
9899
9900            if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) {
9901                Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT);
9902                intent.putExtra("word", originalText);
9903                intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK);
9904                getContext().startActivity(intent);
9905                // There is no way to know if the word was indeed added. Re-check.
9906                // TODO The ExtractEditText should remove the span in the original text instead
9907                editable.removeSpan(suggestionInfo.suggestionSpan);
9908                updateSpellCheckSpans(spanStart, spanEnd);
9909            } else {
9910                // SuggestionSpans are removed by replace: save them before
9911                SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd,
9912                        SuggestionSpan.class);
9913                final int length = suggestionSpans.length;
9914                int[] suggestionSpansStarts = new int[length];
9915                int[] suggestionSpansEnds = new int[length];
9916                int[] suggestionSpansFlags = new int[length];
9917                for (int i = 0; i < length; i++) {
9918                    final SuggestionSpan suggestionSpan = suggestionSpans[i];
9919                    suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan);
9920                    suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan);
9921                    suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan);
9922
9923                    // Remove potential misspelled flags
9924                    int suggestionSpanFlags = suggestionSpan.getFlags();
9925                    if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) {
9926                        suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED;
9927                        suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT;
9928                        suggestionSpan.setFlags(suggestionSpanFlags);
9929                    }
9930                }
9931
9932                final int suggestionStart = suggestionInfo.suggestionStart;
9933                final int suggestionEnd = suggestionInfo.suggestionEnd;
9934                final String suggestion = suggestionInfo.text.subSequence(
9935                        suggestionStart, suggestionEnd).toString();
9936                replaceText_internal(spanStart, spanEnd, suggestion);
9937
9938                // Notify source IME of the suggestion pick. Do this before swaping texts.
9939                if (!TextUtils.isEmpty(
9940                        suggestionInfo.suggestionSpan.getNotificationTargetClassName())) {
9941                    InputMethodManager imm = InputMethodManager.peekInstance();
9942                    if (imm != null) {
9943                        imm.notifySuggestionPicked(suggestionInfo.suggestionSpan, originalText,
9944                                suggestionInfo.suggestionIndex);
9945                    }
9946                }
9947
9948                // Swap text content between actual text and Suggestion span
9949                String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions();
9950                suggestions[suggestionInfo.suggestionIndex] = originalText;
9951
9952                // Restore previous SuggestionSpans
9953                final int lengthDifference = suggestion.length() - (spanEnd - spanStart);
9954                for (int i = 0; i < length; i++) {
9955                    // Only spans that include the modified region make sense after replacement
9956                    // Spans partially included in the replaced region are removed, there is no
9957                    // way to assign them a valid range after replacement
9958                    if (suggestionSpansStarts[i] <= spanStart &&
9959                            suggestionSpansEnds[i] >= spanEnd) {
9960                        // TODO The ExtractEditText should restore these spans in the original text
9961                        editable.setSpan(suggestionSpans[i], suggestionSpansStarts[i],
9962                                suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]);
9963                    }
9964                }
9965
9966                // Move cursor at the end of the replaced word
9967                Selection.setSelection(editable, spanEnd + lengthDifference);
9968            }
9969
9970            hide();
9971        }
9972    }
9973
9974    /**
9975     * Removes the suggestion spans.
9976     */
9977    CharSequence removeSuggestionSpans(CharSequence text) {
9978       if (text instanceof Spanned) {
9979           Spannable spannable;
9980           if (text instanceof Spannable) {
9981               spannable = (Spannable) text;
9982           } else {
9983               spannable = new SpannableString(text);
9984               text = spannable;
9985           }
9986
9987           SuggestionSpan[] spans = spannable.getSpans(0, text.length(), SuggestionSpan.class);
9988           for (int i = 0; i < spans.length; i++) {
9989               spannable.removeSpan(spans[i]);
9990           }
9991       }
9992       return text;
9993    }
9994
9995    void showSuggestions() {
9996        if (mSuggestionsPopupWindow == null) {
9997            mSuggestionsPopupWindow = new SuggestionsPopupWindow();
9998        }
9999        hideControllers();
10000        mSuggestionsPopupWindow.show();
10001    }
10002
10003    boolean areSuggestionsShown() {
10004        return mSuggestionsPopupWindow != null && mSuggestionsPopupWindow.isShowing();
10005    }
10006
10007    /**
10008     * Return whether or not suggestions are enabled on this TextView. The suggestions are generated
10009     * by the IME or by the spell checker as the user types. This is done by adding
10010     * {@link SuggestionSpan}s to the text.
10011     *
10012     * When suggestions are enabled (default), this list of suggestions will be displayed when the
10013     * user asks for them on these parts of the text. This value depends on the inputType of this
10014     * TextView.
10015     *
10016     * The class of the input type must be {@link InputType#TYPE_CLASS_TEXT}.
10017     *
10018     * In addition, the type variation must be one of
10019     * {@link InputType#TYPE_TEXT_VARIATION_NORMAL},
10020     * {@link InputType#TYPE_TEXT_VARIATION_EMAIL_SUBJECT},
10021     * {@link InputType#TYPE_TEXT_VARIATION_LONG_MESSAGE},
10022     * {@link InputType#TYPE_TEXT_VARIATION_SHORT_MESSAGE} or
10023     * {@link InputType#TYPE_TEXT_VARIATION_WEB_EDIT_TEXT}.
10024     *
10025     * And finally, the {@link InputType#TYPE_TEXT_FLAG_NO_SUGGESTIONS} flag must <i>not</i> be set.
10026     *
10027     * @return true if the suggestions popup window is enabled, based on the inputType.
10028     */
10029    public boolean isSuggestionsEnabled() {
10030        if ((mInputType & InputType.TYPE_MASK_CLASS) != InputType.TYPE_CLASS_TEXT) return false;
10031        if ((mInputType & InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS) > 0) return false;
10032
10033        final int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
10034        return (variation == EditorInfo.TYPE_TEXT_VARIATION_NORMAL ||
10035                variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT ||
10036                variation == EditorInfo.TYPE_TEXT_VARIATION_LONG_MESSAGE ||
10037                variation == EditorInfo.TYPE_TEXT_VARIATION_SHORT_MESSAGE ||
10038                variation == EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT);
10039    }
10040
10041    /**
10042     * If provided, this ActionMode.Callback will be used to create the ActionMode when text
10043     * selection is initiated in this View.
10044     *
10045     * The standard implementation populates the menu with a subset of Select All, Cut, Copy and
10046     * Paste actions, depending on what this View supports.
10047     *
10048     * A custom implementation can add new entries in the default menu in its
10049     * {@link android.view.ActionMode.Callback#onPrepareActionMode(ActionMode, Menu)} method. The
10050     * default actions can also be removed from the menu using {@link Menu#removeItem(int)} and
10051     * passing {@link android.R.id#selectAll}, {@link android.R.id#cut}, {@link android.R.id#copy}
10052     * or {@link android.R.id#paste} ids as parameters.
10053     *
10054     * Returning false from
10055     * {@link android.view.ActionMode.Callback#onCreateActionMode(ActionMode, Menu)} will prevent
10056     * the action mode from being started.
10057     *
10058     * Action click events should be handled by the custom implementation of
10059     * {@link android.view.ActionMode.Callback#onActionItemClicked(ActionMode, MenuItem)}.
10060     *
10061     * Note that text selection mode is not started when a TextView receives focus and the
10062     * {@link android.R.attr#selectAllOnFocus} flag has been set. The content is highlighted in
10063     * that case, to allow for quick replacement.
10064     */
10065    public void setCustomSelectionActionModeCallback(ActionMode.Callback actionModeCallback) {
10066        mCustomSelectionActionModeCallback = actionModeCallback;
10067    }
10068
10069    /**
10070     * Retrieves the value set in {@link #setCustomSelectionActionModeCallback}. Default is null.
10071     *
10072     * @return The current custom selection callback.
10073     */
10074    public ActionMode.Callback getCustomSelectionActionModeCallback() {
10075        return mCustomSelectionActionModeCallback;
10076    }
10077
10078    /**
10079     *
10080     * @return true if the selection mode was actually started.
10081     */
10082    private boolean startSelectionActionMode() {
10083        if (mSelectionActionMode != null) {
10084            // Selection action mode is already started
10085            return false;
10086        }
10087
10088        if (!canSelectText() || !requestFocus()) {
10089            Log.w(LOG_TAG, "TextView does not support text selection. Action mode cancelled.");
10090            return false;
10091        }
10092
10093        if (!hasSelection()) {
10094            // There may already be a selection on device rotation
10095            if (!selectCurrentWord()) {
10096                // No word found under cursor or text selection not permitted.
10097                return false;
10098            }
10099        }
10100
10101        boolean willExtract = extractedTextModeWillBeStarted();
10102
10103        // Do not start the action mode when extracted text will show up full screen, thus
10104        // immediately hiding the newly created action bar, which would be visually distracting.
10105        if (!willExtract) {
10106            ActionMode.Callback actionModeCallback = new SelectionActionModeCallback();
10107            mSelectionActionMode = startActionMode(actionModeCallback);
10108        }
10109
10110        final boolean selectionStarted = mSelectionActionMode != null || willExtract;
10111        if (selectionStarted && !mTextIsSelectable && mSoftInputShownOnFocus) {
10112            // Show the IME to be able to replace text, except when selecting non editable text.
10113            final InputMethodManager imm = InputMethodManager.peekInstance();
10114            if (imm != null) {
10115                imm.showSoftInput(this, 0, null);
10116            }
10117        }
10118
10119        return selectionStarted;
10120    }
10121
10122    private boolean extractedTextModeWillBeStarted() {
10123        if (!(this instanceof ExtractEditText)) {
10124            final InputMethodManager imm = InputMethodManager.peekInstance();
10125            return  imm != null && imm.isFullscreenMode();
10126        }
10127        return false;
10128    }
10129
10130    private void stopSelectionActionMode() {
10131        if (mSelectionActionMode != null) {
10132            // This will hide the mSelectionModifierCursorController
10133            mSelectionActionMode.finish();
10134        }
10135    }
10136
10137    /**
10138     * Paste clipboard content between min and max positions.
10139     */
10140    private void paste(int min, int max) {
10141        ClipboardManager clipboard =
10142            (ClipboardManager) getContext().getSystemService(Context.CLIPBOARD_SERVICE);
10143        ClipData clip = clipboard.getPrimaryClip();
10144        if (clip != null) {
10145            boolean didFirst = false;
10146            for (int i=0; i<clip.getItemCount(); i++) {
10147                CharSequence paste = clip.getItemAt(i).coerceToText(getContext());
10148                if (paste != null) {
10149                    if (!didFirst) {
10150                        long minMax = prepareSpacesAroundPaste(min, max, paste);
10151                        min = extractRangeStartFromLong(minMax);
10152                        max = extractRangeEndFromLong(minMax);
10153                        Selection.setSelection((Spannable) mText, max);
10154                        ((Editable) mText).replace(min, max, paste);
10155                        didFirst = true;
10156                    } else {
10157                        ((Editable) mText).insert(getSelectionEnd(), "\n");
10158                        ((Editable) mText).insert(getSelectionEnd(), paste);
10159                    }
10160                }
10161            }
10162            stopSelectionActionMode();
10163            sLastCutOrCopyTime = 0;
10164        }
10165    }
10166
10167    private void setPrimaryClip(ClipData clip) {
10168        ClipboardManager clipboard = (ClipboardManager) getContext().
10169                getSystemService(Context.CLIPBOARD_SERVICE);
10170        clipboard.setPrimaryClip(clip);
10171        sLastCutOrCopyTime = SystemClock.uptimeMillis();
10172    }
10173
10174    /**
10175     * An ActionMode Callback class that is used to provide actions while in text selection mode.
10176     *
10177     * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending
10178     * on which of these this TextView supports.
10179     */
10180    private class SelectionActionModeCallback implements ActionMode.Callback {
10181
10182        @Override
10183        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
10184            TypedArray styledAttributes = mContext.obtainStyledAttributes(
10185                    com.android.internal.R.styleable.SelectionModeDrawables);
10186
10187            boolean allowText = getContext().getResources().getBoolean(
10188                    com.android.internal.R.bool.config_allowActionMenuItemTextWithIcon);
10189
10190            mode.setTitle(allowText ?
10191                    mContext.getString(com.android.internal.R.string.textSelectionCABTitle) : null);
10192            mode.setSubtitle(null);
10193
10194            int selectAllIconId = 0; // No icon by default
10195            if (!allowText) {
10196                // Provide an icon, text will not be displayed on smaller screens.
10197                selectAllIconId = styledAttributes.getResourceId(
10198                        R.styleable.SelectionModeDrawables_actionModeSelectAllDrawable, 0);
10199            }
10200
10201            menu.add(0, ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll).
10202                    setIcon(selectAllIconId).
10203                    setAlphabeticShortcut('a').
10204                    setShowAsAction(
10205                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10206
10207            if (canCut()) {
10208                menu.add(0, ID_CUT, 0, com.android.internal.R.string.cut).
10209                    setIcon(styledAttributes.getResourceId(
10210                            R.styleable.SelectionModeDrawables_actionModeCutDrawable, 0)).
10211                    setAlphabeticShortcut('x').
10212                    setShowAsAction(
10213                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10214            }
10215
10216            if (canCopy()) {
10217                menu.add(0, ID_COPY, 0, com.android.internal.R.string.copy).
10218                    setIcon(styledAttributes.getResourceId(
10219                            R.styleable.SelectionModeDrawables_actionModeCopyDrawable, 0)).
10220                    setAlphabeticShortcut('c').
10221                    setShowAsAction(
10222                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10223            }
10224
10225            if (canPaste()) {
10226                menu.add(0, ID_PASTE, 0, com.android.internal.R.string.paste).
10227                        setIcon(styledAttributes.getResourceId(
10228                                R.styleable.SelectionModeDrawables_actionModePasteDrawable, 0)).
10229                        setAlphabeticShortcut('v').
10230                        setShowAsAction(
10231                                MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10232            }
10233
10234            styledAttributes.recycle();
10235
10236            if (mCustomSelectionActionModeCallback != null) {
10237                if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) {
10238                    // The custom mode can choose to cancel the action mode
10239                    return false;
10240                }
10241            }
10242
10243            if (menu.hasVisibleItems() || mode.getCustomView() != null) {
10244                getSelectionController().show();
10245                return true;
10246            } else {
10247                return false;
10248            }
10249        }
10250
10251        @Override
10252        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
10253            if (mCustomSelectionActionModeCallback != null) {
10254                return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu);
10255            }
10256            return true;
10257        }
10258
10259        @Override
10260        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
10261            if (mCustomSelectionActionModeCallback != null &&
10262                 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) {
10263                return true;
10264            }
10265            return onTextContextMenuItem(item.getItemId());
10266        }
10267
10268        @Override
10269        public void onDestroyActionMode(ActionMode mode) {
10270            if (mCustomSelectionActionModeCallback != null) {
10271                mCustomSelectionActionModeCallback.onDestroyActionMode(mode);
10272            }
10273            Selection.setSelection((Spannable) mText, getSelectionEnd());
10274
10275            if (mSelectionModifierCursorController != null) {
10276                mSelectionModifierCursorController.hide();
10277            }
10278
10279            mSelectionActionMode = null;
10280        }
10281    }
10282
10283    private class ActionPopupWindow extends PinnedPopupWindow implements OnClickListener {
10284        private static final int POPUP_TEXT_LAYOUT =
10285                com.android.internal.R.layout.text_edit_action_popup_text;
10286        private TextView mPasteTextView;
10287        private TextView mReplaceTextView;
10288
10289        @Override
10290        protected void createPopupWindow() {
10291            mPopupWindow = new PopupWindow(TextView.this.mContext, null,
10292                    com.android.internal.R.attr.textSelectHandleWindowStyle);
10293            mPopupWindow.setClippingEnabled(true);
10294        }
10295
10296        @Override
10297        protected void initContentView() {
10298            LinearLayout linearLayout = new LinearLayout(TextView.this.getContext());
10299            linearLayout.setOrientation(LinearLayout.HORIZONTAL);
10300            mContentView = linearLayout;
10301            mContentView.setBackgroundResource(
10302                    com.android.internal.R.drawable.text_edit_paste_window);
10303
10304            LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
10305                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
10306
10307            LayoutParams wrapContent = new LayoutParams(
10308                    ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
10309
10310            mPasteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
10311            mPasteTextView.setLayoutParams(wrapContent);
10312            mContentView.addView(mPasteTextView);
10313            mPasteTextView.setText(com.android.internal.R.string.paste);
10314            mPasteTextView.setOnClickListener(this);
10315
10316            mReplaceTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
10317            mReplaceTextView.setLayoutParams(wrapContent);
10318            mContentView.addView(mReplaceTextView);
10319            mReplaceTextView.setText(com.android.internal.R.string.replace);
10320            mReplaceTextView.setOnClickListener(this);
10321        }
10322
10323        @Override
10324        public void show() {
10325            boolean canPaste = canPaste();
10326            boolean canSuggest = isSuggestionsEnabled() && isCursorInsideSuggestionSpan();
10327            mPasteTextView.setVisibility(canPaste ? View.VISIBLE : View.GONE);
10328            mReplaceTextView.setVisibility(canSuggest ? View.VISIBLE : View.GONE);
10329
10330            if (!canPaste && !canSuggest) return;
10331
10332            super.show();
10333        }
10334
10335        @Override
10336        public void onClick(View view) {
10337            if (view == mPasteTextView && canPaste()) {
10338                onTextContextMenuItem(ID_PASTE);
10339                hide();
10340            } else if (view == mReplaceTextView) {
10341                final int middle = (getSelectionStart() + getSelectionEnd()) / 2;
10342                stopSelectionActionMode();
10343                Selection.setSelection((Spannable) mText, middle);
10344                showSuggestions();
10345            }
10346        }
10347
10348        @Override
10349        protected int getTextOffset() {
10350            return (getSelectionStart() + getSelectionEnd()) / 2;
10351        }
10352
10353        @Override
10354        protected int getVerticalLocalPosition(int line) {
10355            return mLayout.getLineTop(line) - mContentView.getMeasuredHeight();
10356        }
10357
10358        @Override
10359        protected int clipVertically(int positionY) {
10360            if (positionY < 0) {
10361                final int offset = getTextOffset();
10362                final int line = mLayout.getLineForOffset(offset);
10363                positionY += mLayout.getLineBottom(line) - mLayout.getLineTop(line);
10364                positionY += mContentView.getMeasuredHeight();
10365
10366                // Assumes insertion and selection handles share the same height
10367                final Drawable handle = mContext.getResources().getDrawable(mTextSelectHandleRes);
10368                positionY += handle.getIntrinsicHeight();
10369            }
10370
10371            return positionY;
10372        }
10373    }
10374
10375    private abstract class HandleView extends View implements TextViewPositionListener {
10376        protected Drawable mDrawable;
10377        protected Drawable mDrawableLtr;
10378        protected Drawable mDrawableRtl;
10379        private final PopupWindow mContainer;
10380        // Position with respect to the parent TextView
10381        private int mPositionX, mPositionY;
10382        private boolean mIsDragging;
10383        // Offset from touch position to mPosition
10384        private float mTouchToWindowOffsetX, mTouchToWindowOffsetY;
10385        protected int mHotspotX;
10386        // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up
10387        private float mTouchOffsetY;
10388        // Where the touch position should be on the handle to ensure a maximum cursor visibility
10389        private float mIdealVerticalOffset;
10390        // Parent's (TextView) previous position in window
10391        private int mLastParentX, mLastParentY;
10392        // Transient action popup window for Paste and Replace actions
10393        protected ActionPopupWindow mActionPopupWindow;
10394        // Previous text character offset
10395        private int mPreviousOffset = -1;
10396        // Previous text character offset
10397        private boolean mPositionHasChanged = true;
10398        // Used to delay the appearance of the action popup window
10399        private Runnable mActionPopupShower;
10400
10401        public HandleView(Drawable drawableLtr, Drawable drawableRtl) {
10402            super(TextView.this.mContext);
10403            mContainer = new PopupWindow(TextView.this.mContext, null,
10404                    com.android.internal.R.attr.textSelectHandleWindowStyle);
10405            mContainer.setSplitTouchEnabled(true);
10406            mContainer.setClippingEnabled(false);
10407            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
10408            mContainer.setContentView(this);
10409
10410            mDrawableLtr = drawableLtr;
10411            mDrawableRtl = drawableRtl;
10412
10413            updateDrawable();
10414
10415            final int handleHeight = mDrawable.getIntrinsicHeight();
10416            mTouchOffsetY = -0.3f * handleHeight;
10417            mIdealVerticalOffset = 0.7f * handleHeight;
10418        }
10419
10420        protected void updateDrawable() {
10421            final int offset = getCurrentCursorOffset();
10422            final boolean isRtlCharAtOffset = mLayout.isRtlCharAt(offset);
10423            mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr;
10424            mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset);
10425        }
10426
10427        protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun);
10428
10429        // Touch-up filter: number of previous positions remembered
10430        private static final int HISTORY_SIZE = 5;
10431        private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150;
10432        private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350;
10433        private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE];
10434        private final int[] mPreviousOffsets = new int[HISTORY_SIZE];
10435        private int mPreviousOffsetIndex = 0;
10436        private int mNumberPreviousOffsets = 0;
10437
10438        private void startTouchUpFilter(int offset) {
10439            mNumberPreviousOffsets = 0;
10440            addPositionToTouchUpFilter(offset);
10441        }
10442
10443        private void addPositionToTouchUpFilter(int offset) {
10444            mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE;
10445            mPreviousOffsets[mPreviousOffsetIndex] = offset;
10446            mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis();
10447            mNumberPreviousOffsets++;
10448        }
10449
10450        private void filterOnTouchUp() {
10451            final long now = SystemClock.uptimeMillis();
10452            int i = 0;
10453            int index = mPreviousOffsetIndex;
10454            final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE);
10455            while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) {
10456                i++;
10457                index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE;
10458            }
10459
10460            if (i > 0 && i < iMax &&
10461                    (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) {
10462                positionAtCursorOffset(mPreviousOffsets[index], false);
10463            }
10464        }
10465
10466        public boolean offsetHasBeenChanged() {
10467            return mNumberPreviousOffsets > 1;
10468        }
10469
10470        @Override
10471        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
10472            setMeasuredDimension(mDrawable.getIntrinsicWidth(), mDrawable.getIntrinsicHeight());
10473        }
10474
10475        public void show() {
10476            if (isShowing()) return;
10477
10478            getPositionListener().addSubscriber(this, true /* local position may change */);
10479
10480            // Make sure the offset is always considered new, even when focusing at same position
10481            mPreviousOffset = -1;
10482            positionAtCursorOffset(getCurrentCursorOffset(), false);
10483
10484            hideActionPopupWindow();
10485        }
10486
10487        protected void dismiss() {
10488            mIsDragging = false;
10489            mContainer.dismiss();
10490            onDetached();
10491        }
10492
10493        public void hide() {
10494            dismiss();
10495
10496            TextView.this.getPositionListener().removeSubscriber(this);
10497        }
10498
10499        void showActionPopupWindow(int delay) {
10500            if (mActionPopupWindow == null) {
10501                mActionPopupWindow = new ActionPopupWindow();
10502            }
10503            if (mActionPopupShower == null) {
10504                mActionPopupShower = new Runnable() {
10505                    public void run() {
10506                        mActionPopupWindow.show();
10507                    }
10508                };
10509            } else {
10510                TextView.this.removeCallbacks(mActionPopupShower);
10511            }
10512            TextView.this.postDelayed(mActionPopupShower, delay);
10513        }
10514
10515        protected void hideActionPopupWindow() {
10516            if (mActionPopupShower != null) {
10517                TextView.this.removeCallbacks(mActionPopupShower);
10518            }
10519            if (mActionPopupWindow != null) {
10520                mActionPopupWindow.hide();
10521            }
10522        }
10523
10524        public boolean isShowing() {
10525            return mContainer.isShowing();
10526        }
10527
10528        private boolean isVisible() {
10529            // Always show a dragging handle.
10530            if (mIsDragging) {
10531                return true;
10532            }
10533
10534            if (isInBatchEditMode()) {
10535                return false;
10536            }
10537
10538            return getPositionListener().isVisible(mPositionX + mHotspotX, mPositionY);
10539        }
10540
10541        public abstract int getCurrentCursorOffset();
10542
10543        protected abstract void updateSelection(int offset);
10544
10545        public abstract void updatePosition(float x, float y);
10546
10547        protected void positionAtCursorOffset(int offset, boolean parentScrolled) {
10548            // A HandleView relies on the layout, which may be nulled by external methods
10549            if (mLayout == null) {
10550                // Will update controllers' state, hiding them and stopping selection mode if needed
10551                prepareCursorControllers();
10552                return;
10553            }
10554
10555            if (offset != mPreviousOffset || parentScrolled) {
10556                updateSelection(offset);
10557                addPositionToTouchUpFilter(offset);
10558                final int line = mLayout.getLineForOffset(offset);
10559
10560                mPositionX = (int) (mLayout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX);
10561                mPositionY = mLayout.getLineBottom(line);
10562
10563                // Take TextView's padding and scroll into account.
10564                mPositionX += viewportToContentHorizontalOffset();
10565                mPositionY += viewportToContentVerticalOffset();
10566
10567                mPreviousOffset = offset;
10568                mPositionHasChanged = true;
10569            }
10570        }
10571
10572        public void updatePosition(int parentPositionX, int parentPositionY,
10573                boolean parentPositionChanged, boolean parentScrolled) {
10574            positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled);
10575            if (parentPositionChanged || mPositionHasChanged) {
10576                if (mIsDragging) {
10577                    // Update touchToWindow offset in case of parent scrolling while dragging
10578                    if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) {
10579                        mTouchToWindowOffsetX += parentPositionX - mLastParentX;
10580                        mTouchToWindowOffsetY += parentPositionY - mLastParentY;
10581                        mLastParentX = parentPositionX;
10582                        mLastParentY = parentPositionY;
10583                    }
10584
10585                    onHandleMoved();
10586                }
10587
10588                if (isVisible()) {
10589                    final int positionX = parentPositionX + mPositionX;
10590                    final int positionY = parentPositionY + mPositionY;
10591                    if (isShowing()) {
10592                        mContainer.update(positionX, positionY, -1, -1);
10593                    } else {
10594                        mContainer.showAtLocation(TextView.this, Gravity.NO_GRAVITY,
10595                                positionX, positionY);
10596                    }
10597                } else {
10598                    if (isShowing()) {
10599                        dismiss();
10600                    }
10601                }
10602
10603                mPositionHasChanged = false;
10604            }
10605        }
10606
10607        @Override
10608        protected void onDraw(Canvas c) {
10609            mDrawable.setBounds(0, 0, mRight - mLeft, mBottom - mTop);
10610            mDrawable.draw(c);
10611        }
10612
10613        @Override
10614        public boolean onTouchEvent(MotionEvent ev) {
10615            switch (ev.getActionMasked()) {
10616                case MotionEvent.ACTION_DOWN: {
10617                    startTouchUpFilter(getCurrentCursorOffset());
10618                    mTouchToWindowOffsetX = ev.getRawX() - mPositionX;
10619                    mTouchToWindowOffsetY = ev.getRawY() - mPositionY;
10620
10621                    final PositionListener positionListener = getPositionListener();
10622                    mLastParentX = positionListener.getPositionX();
10623                    mLastParentY = positionListener.getPositionY();
10624                    mIsDragging = true;
10625                    break;
10626                }
10627
10628                case MotionEvent.ACTION_MOVE: {
10629                    final float rawX = ev.getRawX();
10630                    final float rawY = ev.getRawY();
10631
10632                    // Vertical hysteresis: vertical down movement tends to snap to ideal offset
10633                    final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY;
10634                    final float currentVerticalOffset = rawY - mPositionY - mLastParentY;
10635                    float newVerticalOffset;
10636                    if (previousVerticalOffset < mIdealVerticalOffset) {
10637                        newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset);
10638                        newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset);
10639                    } else {
10640                        newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset);
10641                        newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset);
10642                    }
10643                    mTouchToWindowOffsetY = newVerticalOffset + mLastParentY;
10644
10645                    final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX;
10646                    final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY;
10647
10648                    updatePosition(newPosX, newPosY);
10649                    break;
10650                }
10651
10652                case MotionEvent.ACTION_UP:
10653                    filterOnTouchUp();
10654                    mIsDragging = false;
10655                    break;
10656
10657                case MotionEvent.ACTION_CANCEL:
10658                    mIsDragging = false;
10659                    break;
10660            }
10661            return true;
10662        }
10663
10664        public boolean isDragging() {
10665            return mIsDragging;
10666        }
10667
10668        void onHandleMoved() {
10669            hideActionPopupWindow();
10670        }
10671
10672        public void onDetached() {
10673            hideActionPopupWindow();
10674        }
10675    }
10676
10677    private class InsertionHandleView extends HandleView {
10678        private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000;
10679        private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds
10680
10681        // Used to detect taps on the insertion handle, which will affect the ActionPopupWindow
10682        private float mDownPositionX, mDownPositionY;
10683        private Runnable mHider;
10684
10685        public InsertionHandleView(Drawable drawable) {
10686            super(drawable, drawable);
10687        }
10688
10689        @Override
10690        public void show() {
10691            super.show();
10692
10693            final long durationSinceCutOrCopy = SystemClock.uptimeMillis() - sLastCutOrCopyTime;
10694            if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) {
10695                showActionPopupWindow(0);
10696            }
10697
10698            hideAfterDelay();
10699        }
10700
10701        public void showWithActionPopup() {
10702            show();
10703            showActionPopupWindow(0);
10704        }
10705
10706        private void hideAfterDelay() {
10707            removeHiderCallback();
10708            if (mHider == null) {
10709                mHider = new Runnable() {
10710                    public void run() {
10711                        hide();
10712                    }
10713                };
10714            }
10715            TextView.this.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT);
10716        }
10717
10718        private void removeHiderCallback() {
10719            if (mHider != null) {
10720                TextView.this.removeCallbacks(mHider);
10721            }
10722        }
10723
10724        @Override
10725        protected int getHotspotX(Drawable drawable, boolean isRtlRun) {
10726            return drawable.getIntrinsicWidth() / 2;
10727        }
10728
10729        @Override
10730        public boolean onTouchEvent(MotionEvent ev) {
10731            final boolean result = super.onTouchEvent(ev);
10732
10733            switch (ev.getActionMasked()) {
10734                case MotionEvent.ACTION_DOWN:
10735                    mDownPositionX = ev.getRawX();
10736                    mDownPositionY = ev.getRawY();
10737                    break;
10738
10739                case MotionEvent.ACTION_UP:
10740                    if (!offsetHasBeenChanged()) {
10741                        final float deltaX = mDownPositionX - ev.getRawX();
10742                        final float deltaY = mDownPositionY - ev.getRawY();
10743                        final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
10744                        if (distanceSquared < mSquaredTouchSlopDistance) {
10745                            if (mActionPopupWindow != null && mActionPopupWindow.isShowing()) {
10746                                // Tapping on the handle dismisses the displayed action popup
10747                                mActionPopupWindow.hide();
10748                            } else {
10749                                showWithActionPopup();
10750                            }
10751                        }
10752                    }
10753                    hideAfterDelay();
10754                    break;
10755
10756                case MotionEvent.ACTION_CANCEL:
10757                    hideAfterDelay();
10758                    break;
10759
10760                default:
10761                    break;
10762            }
10763
10764            return result;
10765        }
10766
10767        @Override
10768        public int getCurrentCursorOffset() {
10769            return TextView.this.getSelectionStart();
10770        }
10771
10772        @Override
10773        public void updateSelection(int offset) {
10774            Selection.setSelection((Spannable) mText, offset);
10775        }
10776
10777        @Override
10778        public void updatePosition(float x, float y) {
10779            positionAtCursorOffset(getOffsetForPosition(x, y), false);
10780        }
10781
10782        @Override
10783        void onHandleMoved() {
10784            super.onHandleMoved();
10785            removeHiderCallback();
10786        }
10787
10788        @Override
10789        public void onDetached() {
10790            super.onDetached();
10791            removeHiderCallback();
10792        }
10793    }
10794
10795    private class SelectionStartHandleView extends HandleView {
10796
10797        public SelectionStartHandleView(Drawable drawableLtr, Drawable drawableRtl) {
10798            super(drawableLtr, drawableRtl);
10799        }
10800
10801        @Override
10802        protected int getHotspotX(Drawable drawable, boolean isRtlRun) {
10803            if (isRtlRun) {
10804                return drawable.getIntrinsicWidth() / 4;
10805            } else {
10806                return (drawable.getIntrinsicWidth() * 3) / 4;
10807            }
10808        }
10809
10810        @Override
10811        public int getCurrentCursorOffset() {
10812            return TextView.this.getSelectionStart();
10813        }
10814
10815        @Override
10816        public void updateSelection(int offset) {
10817            Selection.setSelection((Spannable) mText, offset, getSelectionEnd());
10818            updateDrawable();
10819        }
10820
10821        @Override
10822        public void updatePosition(float x, float y) {
10823            int offset = getOffsetForPosition(x, y);
10824
10825            // Handles can not cross and selection is at least one character
10826            final int selectionEnd = getSelectionEnd();
10827            if (offset >= selectionEnd) offset = Math.max(0, selectionEnd - 1);
10828
10829            positionAtCursorOffset(offset, false);
10830        }
10831
10832        public ActionPopupWindow getActionPopupWindow() {
10833            return mActionPopupWindow;
10834        }
10835    }
10836
10837    private class SelectionEndHandleView extends HandleView {
10838
10839        public SelectionEndHandleView(Drawable drawableLtr, Drawable drawableRtl) {
10840            super(drawableLtr, drawableRtl);
10841        }
10842
10843        @Override
10844        protected int getHotspotX(Drawable drawable, boolean isRtlRun) {
10845            if (isRtlRun) {
10846                return (drawable.getIntrinsicWidth() * 3) / 4;
10847            } else {
10848                return drawable.getIntrinsicWidth() / 4;
10849            }
10850        }
10851
10852        @Override
10853        public int getCurrentCursorOffset() {
10854            return TextView.this.getSelectionEnd();
10855        }
10856
10857        @Override
10858        public void updateSelection(int offset) {
10859            Selection.setSelection((Spannable) mText, getSelectionStart(), offset);
10860            updateDrawable();
10861        }
10862
10863        @Override
10864        public void updatePosition(float x, float y) {
10865            int offset = getOffsetForPosition(x, y);
10866
10867            // Handles can not cross and selection is at least one character
10868            final int selectionStart = getSelectionStart();
10869            if (offset <= selectionStart) offset = Math.min(selectionStart + 1, mText.length());
10870
10871            positionAtCursorOffset(offset, false);
10872        }
10873
10874        public void setActionPopupWindow(ActionPopupWindow actionPopupWindow) {
10875            mActionPopupWindow = actionPopupWindow;
10876        }
10877    }
10878
10879    /**
10880     * A CursorController instance can be used to control a cursor in the text.
10881     * It is not used outside of {@link TextView}.
10882     * @hide
10883     */
10884    private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener {
10885        /**
10886         * Makes the cursor controller visible on screen. Will be drawn by {@link #draw(Canvas)}.
10887         * See also {@link #hide()}.
10888         */
10889        public void show();
10890
10891        /**
10892         * Hide the cursor controller from screen.
10893         * See also {@link #show()}.
10894         */
10895        public void hide();
10896
10897        /**
10898         * Called when the view is detached from window. Perform house keeping task, such as
10899         * stopping Runnable thread that would otherwise keep a reference on the context, thus
10900         * preventing the activity from being recycled.
10901         */
10902        public void onDetached();
10903    }
10904
10905    private class InsertionPointCursorController implements CursorController {
10906        private InsertionHandleView mHandle;
10907
10908        public void show() {
10909            getHandle().show();
10910        }
10911
10912        public void showWithActionPopup() {
10913            getHandle().showWithActionPopup();
10914        }
10915
10916        public void hide() {
10917            if (mHandle != null) {
10918                mHandle.hide();
10919            }
10920        }
10921
10922        public void onTouchModeChanged(boolean isInTouchMode) {
10923            if (!isInTouchMode) {
10924                hide();
10925            }
10926        }
10927
10928        private InsertionHandleView getHandle() {
10929            if (mSelectHandleCenter == null) {
10930                mSelectHandleCenter = mContext.getResources().getDrawable(
10931                        mTextSelectHandleRes);
10932            }
10933            if (mHandle == null) {
10934                mHandle = new InsertionHandleView(mSelectHandleCenter);
10935            }
10936            return mHandle;
10937        }
10938
10939        @Override
10940        public void onDetached() {
10941            final ViewTreeObserver observer = getViewTreeObserver();
10942            observer.removeOnTouchModeChangeListener(this);
10943
10944            if (mHandle != null) mHandle.onDetached();
10945        }
10946    }
10947
10948    private class SelectionModifierCursorController implements CursorController {
10949        private static final int DELAY_BEFORE_REPLACE_ACTION = 200; // milliseconds
10950        // The cursor controller handles, lazily created when shown.
10951        private SelectionStartHandleView mStartHandle;
10952        private SelectionEndHandleView mEndHandle;
10953        // The offsets of that last touch down event. Remembered to start selection there.
10954        private int mMinTouchOffset, mMaxTouchOffset;
10955
10956        // Double tap detection
10957        private long mPreviousTapUpTime = 0;
10958        private float mPreviousTapPositionX, mPreviousTapPositionY;
10959
10960        SelectionModifierCursorController() {
10961            resetTouchOffsets();
10962        }
10963
10964        public void show() {
10965            if (isInBatchEditMode()) {
10966                return;
10967            }
10968            initDrawables();
10969            initHandles();
10970            hideInsertionPointCursorController();
10971        }
10972
10973        private void initDrawables() {
10974            if (mSelectHandleLeft == null) {
10975                mSelectHandleLeft = mContext.getResources().getDrawable(
10976                        mTextSelectHandleLeftRes);
10977            }
10978            if (mSelectHandleRight == null) {
10979                mSelectHandleRight = mContext.getResources().getDrawable(
10980                        mTextSelectHandleRightRes);
10981            }
10982        }
10983
10984        private void initHandles() {
10985            // Lazy object creation has to be done before updatePosition() is called.
10986            if (mStartHandle == null) {
10987                mStartHandle = new SelectionStartHandleView(mSelectHandleLeft, mSelectHandleRight);
10988            }
10989            if (mEndHandle == null) {
10990                mEndHandle = new SelectionEndHandleView(mSelectHandleRight, mSelectHandleLeft);
10991            }
10992
10993            mStartHandle.show();
10994            mEndHandle.show();
10995
10996            // Make sure both left and right handles share the same ActionPopupWindow (so that
10997            // moving any of the handles hides the action popup).
10998            mStartHandle.showActionPopupWindow(DELAY_BEFORE_REPLACE_ACTION);
10999            mEndHandle.setActionPopupWindow(mStartHandle.getActionPopupWindow());
11000
11001            hideInsertionPointCursorController();
11002        }
11003
11004        public void hide() {
11005            if (mStartHandle != null) mStartHandle.hide();
11006            if (mEndHandle != null) mEndHandle.hide();
11007        }
11008
11009        public void onTouchEvent(MotionEvent event) {
11010            // This is done even when the View does not have focus, so that long presses can start
11011            // selection and tap can move cursor from this tap position.
11012            switch (event.getActionMasked()) {
11013                case MotionEvent.ACTION_DOWN:
11014                    final float x = event.getX();
11015                    final float y = event.getY();
11016
11017                    // Remember finger down position, to be able to start selection from there
11018                    mMinTouchOffset = mMaxTouchOffset = getOffsetForPosition(x, y);
11019
11020                    // Double tap detection
11021                    long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime;
11022                    if (duration <= ViewConfiguration.getDoubleTapTimeout() &&
11023                            isPositionOnText(x, y)) {
11024                        final float deltaX = x - mPreviousTapPositionX;
11025                        final float deltaY = y - mPreviousTapPositionY;
11026                        final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
11027                        if (distanceSquared < mSquaredTouchSlopDistance) {
11028                            startSelectionActionMode();
11029                            mDiscardNextActionUp = true;
11030                        }
11031                    }
11032
11033                    mPreviousTapPositionX = x;
11034                    mPreviousTapPositionY = y;
11035                    break;
11036
11037                case MotionEvent.ACTION_POINTER_DOWN:
11038                case MotionEvent.ACTION_POINTER_UP:
11039                    // Handle multi-point gestures. Keep min and max offset positions.
11040                    // Only activated for devices that correctly handle multi-touch.
11041                    if (mContext.getPackageManager().hasSystemFeature(
11042                            PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) {
11043                        updateMinAndMaxOffsets(event);
11044                    }
11045                    break;
11046
11047                case MotionEvent.ACTION_UP:
11048                    mPreviousTapUpTime = SystemClock.uptimeMillis();
11049                    break;
11050            }
11051        }
11052
11053        /**
11054         * @param event
11055         */
11056        private void updateMinAndMaxOffsets(MotionEvent event) {
11057            int pointerCount = event.getPointerCount();
11058            for (int index = 0; index < pointerCount; index++) {
11059                int offset = getOffsetForPosition(event.getX(index), event.getY(index));
11060                if (offset < mMinTouchOffset) mMinTouchOffset = offset;
11061                if (offset > mMaxTouchOffset) mMaxTouchOffset = offset;
11062            }
11063        }
11064
11065        public int getMinTouchOffset() {
11066            return mMinTouchOffset;
11067        }
11068
11069        public int getMaxTouchOffset() {
11070            return mMaxTouchOffset;
11071        }
11072
11073        public void resetTouchOffsets() {
11074            mMinTouchOffset = mMaxTouchOffset = -1;
11075        }
11076
11077        /**
11078         * @return true iff this controller is currently used to move the selection start.
11079         */
11080        public boolean isSelectionStartDragged() {
11081            return mStartHandle != null && mStartHandle.isDragging();
11082        }
11083
11084        public void onTouchModeChanged(boolean isInTouchMode) {
11085            if (!isInTouchMode) {
11086                hide();
11087            }
11088        }
11089
11090        @Override
11091        public void onDetached() {
11092            final ViewTreeObserver observer = getViewTreeObserver();
11093            observer.removeOnTouchModeChangeListener(this);
11094
11095            if (mStartHandle != null) mStartHandle.onDetached();
11096            if (mEndHandle != null) mEndHandle.onDetached();
11097        }
11098    }
11099
11100    private void hideInsertionPointCursorController() {
11101        // No need to create the controller to hide it.
11102        if (mInsertionPointCursorController != null) {
11103            mInsertionPointCursorController.hide();
11104        }
11105    }
11106
11107    /**
11108     * Hides the insertion controller and stops text selection mode, hiding the selection controller
11109     */
11110    private void hideControllers() {
11111        hideCursorControllers();
11112        hideSpanControllers();
11113    }
11114
11115    private void hideSpanControllers() {
11116        if (mChangeWatcher != null) {
11117            mChangeWatcher.hideControllers();
11118        }
11119    }
11120
11121    private void hideCursorControllers() {
11122        if (mSuggestionsPopupWindow != null && !mSuggestionsPopupWindow.isShowingUp()) {
11123            // Should be done before hide insertion point controller since it triggers a show of it
11124            mSuggestionsPopupWindow.hide();
11125        }
11126        hideInsertionPointCursorController();
11127        stopSelectionActionMode();
11128    }
11129
11130    /**
11131     * Get the character offset closest to the specified absolute position. A typical use case is to
11132     * pass the result of {@link MotionEvent#getX()} and {@link MotionEvent#getY()} to this method.
11133     *
11134     * @param x The horizontal absolute position of a point on screen
11135     * @param y The vertical absolute position of a point on screen
11136     * @return the character offset for the character whose position is closest to the specified
11137     *  position. Returns -1 if there is no layout.
11138     */
11139    public int getOffsetForPosition(float x, float y) {
11140        if (getLayout() == null) return -1;
11141        final int line = getLineAtCoordinate(y);
11142        final int offset = getOffsetAtCoordinate(line, x);
11143        return offset;
11144    }
11145
11146    private float convertToLocalHorizontalCoordinate(float x) {
11147        x -= getTotalPaddingLeft();
11148        // Clamp the position to inside of the view.
11149        x = Math.max(0.0f, x);
11150        x = Math.min(getWidth() - getTotalPaddingRight() - 1, x);
11151        x += getScrollX();
11152        return x;
11153    }
11154
11155    private int getLineAtCoordinate(float y) {
11156        y -= getTotalPaddingTop();
11157        // Clamp the position to inside of the view.
11158        y = Math.max(0.0f, y);
11159        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
11160        y += getScrollY();
11161        return getLayout().getLineForVertical((int) y);
11162    }
11163
11164    private int getOffsetAtCoordinate(int line, float x) {
11165        x = convertToLocalHorizontalCoordinate(x);
11166        return getLayout().getOffsetForHorizontal(line, x);
11167    }
11168
11169    /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed
11170     * in the view. Returns false when the position is in the empty space of left/right of text.
11171     */
11172    private boolean isPositionOnText(float x, float y) {
11173        if (getLayout() == null) return false;
11174
11175        final int line = getLineAtCoordinate(y);
11176        x = convertToLocalHorizontalCoordinate(x);
11177
11178        if (x < getLayout().getLineLeft(line)) return false;
11179        if (x > getLayout().getLineRight(line)) return false;
11180        return true;
11181    }
11182
11183    @Override
11184    public boolean onDragEvent(DragEvent event) {
11185        switch (event.getAction()) {
11186            case DragEvent.ACTION_DRAG_STARTED:
11187                return hasInsertionController();
11188
11189            case DragEvent.ACTION_DRAG_ENTERED:
11190                TextView.this.requestFocus();
11191                return true;
11192
11193            case DragEvent.ACTION_DRAG_LOCATION:
11194                final int offset = getOffsetForPosition(event.getX(), event.getY());
11195                Selection.setSelection((Spannable)mText, offset);
11196                return true;
11197
11198            case DragEvent.ACTION_DROP:
11199                onDrop(event);
11200                return true;
11201
11202            case DragEvent.ACTION_DRAG_ENDED:
11203            case DragEvent.ACTION_DRAG_EXITED:
11204            default:
11205                return true;
11206        }
11207    }
11208
11209    private void onDrop(DragEvent event) {
11210        StringBuilder content = new StringBuilder("");
11211        ClipData clipData = event.getClipData();
11212        final int itemCount = clipData.getItemCount();
11213        for (int i=0; i < itemCount; i++) {
11214            Item item = clipData.getItemAt(i);
11215            content.append(item.coerceToText(TextView.this.mContext));
11216        }
11217
11218        final int offset = getOffsetForPosition(event.getX(), event.getY());
11219
11220        Object localState = event.getLocalState();
11221        DragLocalState dragLocalState = null;
11222        if (localState instanceof DragLocalState) {
11223            dragLocalState = (DragLocalState) localState;
11224        }
11225        boolean dragDropIntoItself = dragLocalState != null &&
11226                dragLocalState.sourceTextView == this;
11227
11228        if (dragDropIntoItself) {
11229            if (offset >= dragLocalState.start && offset < dragLocalState.end) {
11230                // A drop inside the original selection discards the drop.
11231                return;
11232            }
11233        }
11234
11235        final int originalLength = mText.length();
11236        long minMax = prepareSpacesAroundPaste(offset, offset, content);
11237        int min = extractRangeStartFromLong(minMax);
11238        int max = extractRangeEndFromLong(minMax);
11239
11240        Selection.setSelection((Spannable) mText, max);
11241        replaceText_internal(min, max, content);
11242
11243        if (dragDropIntoItself) {
11244            int dragSourceStart = dragLocalState.start;
11245            int dragSourceEnd = dragLocalState.end;
11246            if (max <= dragSourceStart) {
11247                // Inserting text before selection has shifted positions
11248                final int shift = mText.length() - originalLength;
11249                dragSourceStart += shift;
11250                dragSourceEnd += shift;
11251            }
11252
11253            // Delete original selection
11254            deleteText_internal(dragSourceStart, dragSourceEnd);
11255
11256            // Make sure we do not leave two adjacent spaces.
11257            if ((dragSourceStart == 0 ||
11258                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart - 1))) &&
11259                    (dragSourceStart == mText.length() ||
11260                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart)))) {
11261                final int pos = dragSourceStart == mText.length() ?
11262                        dragSourceStart - 1 : dragSourceStart;
11263                deleteText_internal(pos, pos + 1);
11264            }
11265        }
11266    }
11267
11268    /**
11269     * @return True if this view supports insertion handles.
11270     */
11271    boolean hasInsertionController() {
11272        return mInsertionControllerEnabled;
11273    }
11274
11275    /**
11276     * @return True if this view supports selection handles.
11277     */
11278    boolean hasSelectionController() {
11279        return mSelectionControllerEnabled;
11280    }
11281
11282    InsertionPointCursorController getInsertionController() {
11283        if (!mInsertionControllerEnabled) {
11284            return null;
11285        }
11286
11287        if (mInsertionPointCursorController == null) {
11288            mInsertionPointCursorController = new InsertionPointCursorController();
11289
11290            final ViewTreeObserver observer = getViewTreeObserver();
11291            observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
11292        }
11293
11294        return mInsertionPointCursorController;
11295    }
11296
11297    SelectionModifierCursorController getSelectionController() {
11298        if (!mSelectionControllerEnabled) {
11299            return null;
11300        }
11301
11302        if (mSelectionModifierCursorController == null) {
11303            mSelectionModifierCursorController = new SelectionModifierCursorController();
11304
11305            final ViewTreeObserver observer = getViewTreeObserver();
11306            observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
11307        }
11308
11309        return mSelectionModifierCursorController;
11310    }
11311
11312    boolean isInBatchEditMode() {
11313        final InputMethodState ims = mInputMethodState;
11314        if (ims != null) {
11315            return ims.mBatchEditNesting > 0;
11316        }
11317        return mInBatchEditControllers;
11318    }
11319
11320    @Override
11321    protected void resolveTextDirection() {
11322        if (hasPasswordTransformationMethod()) {
11323            mTextDir = TextDirectionHeuristics.LOCALE;
11324            return;
11325        }
11326
11327        // Always need to resolve layout direction first
11328        final boolean defaultIsRtl = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL);
11329
11330        // Then resolve text direction on the parent
11331        super.resolveTextDirection();
11332
11333        // Now, we can select the heuristic
11334        int textDir = getResolvedTextDirection();
11335        switch (textDir) {
11336            default:
11337            case TEXT_DIRECTION_FIRST_STRONG:
11338                mTextDir = (defaultIsRtl ? TextDirectionHeuristics.FIRSTSTRONG_RTL :
11339                        TextDirectionHeuristics.FIRSTSTRONG_LTR);
11340                break;
11341            case TEXT_DIRECTION_ANY_RTL:
11342                mTextDir = TextDirectionHeuristics.ANYRTL_LTR;
11343                break;
11344            case TEXT_DIRECTION_LTR:
11345                mTextDir = TextDirectionHeuristics.LTR;
11346                break;
11347            case TEXT_DIRECTION_RTL:
11348                mTextDir = TextDirectionHeuristics.RTL;
11349                break;
11350        }
11351    }
11352
11353    /**
11354     * Subclasses will need to override this method to implement their own way of resolving
11355     * drawables depending on the layout direction.
11356     *
11357     * A call to the super method will be required from the subclasses implementation.
11358     *
11359     */
11360    protected void resolveDrawables() {
11361        // No need to resolve twice
11362        if (mResolvedDrawables) {
11363            return;
11364        }
11365        // No drawable to resolve
11366        if (mDrawables == null) {
11367            return;
11368        }
11369        // No relative drawable to resolve
11370        if (mDrawables.mDrawableStart == null && mDrawables.mDrawableEnd == null) {
11371            mResolvedDrawables = true;
11372            return;
11373        }
11374
11375        Drawables dr = mDrawables;
11376        switch(getResolvedLayoutDirection()) {
11377            case LAYOUT_DIRECTION_RTL:
11378                if (dr.mDrawableStart != null) {
11379                    dr.mDrawableRight = dr.mDrawableStart;
11380
11381                    dr.mDrawableSizeRight = dr.mDrawableSizeStart;
11382                    dr.mDrawableHeightRight = dr.mDrawableHeightStart;
11383                }
11384                if (dr.mDrawableEnd != null) {
11385                    dr.mDrawableLeft = dr.mDrawableEnd;
11386
11387                    dr.mDrawableSizeLeft = dr.mDrawableSizeEnd;
11388                    dr.mDrawableHeightLeft = dr.mDrawableHeightEnd;
11389                }
11390                break;
11391
11392            case LAYOUT_DIRECTION_LTR:
11393            default:
11394                if (dr.mDrawableStart != null) {
11395                    dr.mDrawableLeft = dr.mDrawableStart;
11396
11397                    dr.mDrawableSizeLeft = dr.mDrawableSizeStart;
11398                    dr.mDrawableHeightLeft = dr.mDrawableHeightStart;
11399                }
11400                if (dr.mDrawableEnd != null) {
11401                    dr.mDrawableRight = dr.mDrawableEnd;
11402
11403                    dr.mDrawableSizeRight = dr.mDrawableSizeEnd;
11404                    dr.mDrawableHeightRight = dr.mDrawableHeightEnd;
11405                }
11406                break;
11407        }
11408        mResolvedDrawables = true;
11409    }
11410
11411    protected void resetResolvedDrawables() {
11412        mResolvedDrawables = false;
11413    }
11414
11415    /**
11416     * @hide
11417     */
11418    protected void viewClicked(InputMethodManager imm) {
11419        if (imm != null) {
11420            imm.viewClicked(this);
11421        }
11422    }
11423
11424    /**
11425     * Deletes the range of text [start, end[.
11426     * @hide
11427     */
11428    protected void deleteText_internal(int start, int end) {
11429        ((Editable) mText).delete(start, end);
11430    }
11431
11432    /**
11433     * Replaces the range of text [start, end[ by replacement text
11434     * @hide
11435     */
11436    protected void replaceText_internal(int start, int end, CharSequence text) {
11437        ((Editable) mText).replace(start, end, text);
11438    }
11439
11440    @ViewDebug.ExportedProperty(category = "text")
11441    private CharSequence            mText;
11442    private CharSequence            mTransformed;
11443    private BufferType              mBufferType = BufferType.NORMAL;
11444
11445    private int                     mInputType = EditorInfo.TYPE_NULL;
11446    private CharSequence            mHint;
11447    private Layout                  mHintLayout;
11448
11449    private KeyListener             mInput;
11450
11451    private MovementMethod          mMovement;
11452    private TransformationMethod    mTransformation;
11453    private boolean                 mAllowTransformationLengthChange;
11454    private ChangeWatcher           mChangeWatcher;
11455
11456    private ArrayList<TextWatcher>  mListeners = null;
11457
11458    // display attributes
11459    private final TextPaint         mTextPaint;
11460    private boolean                 mUserSetTextScaleX;
11461    private final Paint             mHighlightPaint;
11462    private int                     mHighlightColor = 0x6633B5E5;
11463    /**
11464     * This is temporarily visible to fix bug 3085564 in webView. Do not rely on
11465     * this field being protected. Will be restored as private when lineHeight
11466     * feature request 3215097 is implemented
11467     * @hide
11468     */
11469    protected Layout                mLayout;
11470
11471    private long                    mShowCursor;
11472    private Blink                   mBlink;
11473    private boolean                 mCursorVisible = true;
11474
11475    // Cursor Controllers.
11476    private InsertionPointCursorController mInsertionPointCursorController;
11477    private SelectionModifierCursorController mSelectionModifierCursorController;
11478    private ActionMode              mSelectionActionMode;
11479    private boolean                 mInsertionControllerEnabled;
11480    private boolean                 mSelectionControllerEnabled;
11481    private boolean                 mInBatchEditControllers;
11482
11483    private boolean                 mSelectAllOnFocus = false;
11484
11485    private int                     mGravity = Gravity.TOP | Gravity.START;
11486    private boolean                 mHorizontallyScrolling;
11487
11488    private int                     mAutoLinkMask;
11489    private boolean                 mLinksClickable = true;
11490
11491    private float                   mSpacingMult = 1.0f;
11492    private float                   mSpacingAdd = 0.0f;
11493    private boolean                 mTextIsSelectable = false;
11494
11495    private static final int        LINES = 1;
11496    private static final int        EMS = LINES;
11497    private static final int        PIXELS = 2;
11498
11499    private int                     mMaximum = Integer.MAX_VALUE;
11500    private int                     mMaxMode = LINES;
11501    private int                     mMinimum = 0;
11502    private int                     mMinMode = LINES;
11503
11504    private int                     mOldMaximum = mMaximum;
11505    private int                     mOldMaxMode = mMaxMode;
11506
11507    private int                     mMaxWidth = Integer.MAX_VALUE;
11508    private int                     mMaxWidthMode = PIXELS;
11509    private int                     mMinWidth = 0;
11510    private int                     mMinWidthMode = PIXELS;
11511
11512    private boolean                 mSingleLine;
11513    private int                     mDesiredHeightAtMeasure = -1;
11514    private boolean                 mIncludePad = true;
11515
11516    // tmp primitives, so we don't alloc them on each draw
11517    private Path                    mHighlightPath;
11518    private boolean                 mHighlightPathBogus = true;
11519    private static final RectF      sTempRect = new RectF();
11520
11521    // XXX should be much larger
11522    private static final int        VERY_WIDE = 1024*1024;
11523
11524    private static final int        BLINK = 500;
11525
11526    private static final int ANIMATED_SCROLL_GAP = 250;
11527    private long mLastScroll;
11528    private Scroller mScroller = null;
11529
11530    private BoringLayout.Metrics mBoring;
11531    private BoringLayout.Metrics mHintBoring;
11532
11533    private BoringLayout mSavedLayout, mSavedHintLayout;
11534
11535    private TextDirectionHeuristic mTextDir = null;
11536
11537    private static final InputFilter[] NO_FILTERS = new InputFilter[0];
11538    private InputFilter[] mFilters = NO_FILTERS;
11539    private static final Spanned EMPTY_SPANNED = new SpannedString("");
11540    private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20;
11541    // System wide time for last cut or copy action.
11542    private static long sLastCutOrCopyTime;
11543    // Used to highlight a word when it is corrected by the IME
11544    private CorrectionHighlighter mCorrectionHighlighter;
11545    // New state used to change background based on whether this TextView is multiline.
11546    private static final int[] MULTILINE_STATE_SET = { R.attr.state_multiline };
11547}
11548