TextView.java revision 481c0a260420a921cdca55130d8d9685d17cf527 
1/*
2 * Copyright (C) 2006 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.widget;
18
19import android.R;
20import android.content.ClipData;
21import android.content.ClipData.Item;
22import android.content.ClipboardManager;
23import android.content.Context;
24import android.content.Intent;
25import android.content.pm.PackageManager;
26import android.content.res.ColorStateList;
27import android.content.res.CompatibilityInfo;
28import android.content.res.Resources;
29import android.content.res.TypedArray;
30import android.content.res.XmlResourceParser;
31import android.graphics.Canvas;
32import android.graphics.Color;
33import android.graphics.Paint;
34import android.graphics.Path;
35import android.graphics.Rect;
36import android.graphics.RectF;
37import android.graphics.Typeface;
38import android.graphics.drawable.Drawable;
39import android.inputmethodservice.ExtractEditText;
40import android.os.Bundle;
41import android.os.Handler;
42import android.os.Message;
43import android.os.Parcel;
44import android.os.Parcelable;
45import android.os.SystemClock;
46import android.provider.Settings;
47import android.text.BoringLayout;
48import android.text.DynamicLayout;
49import android.text.Editable;
50import android.text.GetChars;
51import android.text.GraphicsOperations;
52import android.text.InputFilter;
53import android.text.InputType;
54import android.text.Layout;
55import android.text.ParcelableSpan;
56import android.text.Selection;
57import android.text.SpanWatcher;
58import android.text.Spannable;
59import android.text.SpannableString;
60import android.text.SpannableStringBuilder;
61import android.text.Spanned;
62import android.text.SpannedString;
63import android.text.StaticLayout;
64import android.text.TextDirectionHeuristic;
65import android.text.TextDirectionHeuristics;
66import android.text.TextPaint;
67import android.text.TextUtils;
68import android.text.TextUtils.TruncateAt;
69import android.text.TextWatcher;
70import android.text.method.AllCapsTransformationMethod;
71import android.text.method.ArrowKeyMovementMethod;
72import android.text.method.DateKeyListener;
73import android.text.method.DateTimeKeyListener;
74import android.text.method.DialerKeyListener;
75import android.text.method.DigitsKeyListener;
76import android.text.method.KeyListener;
77import android.text.method.LinkMovementMethod;
78import android.text.method.MetaKeyKeyListener;
79import android.text.method.MovementMethod;
80import android.text.method.PasswordTransformationMethod;
81import android.text.method.SingleLineTransformationMethod;
82import android.text.method.TextKeyListener;
83import android.text.method.TimeKeyListener;
84import android.text.method.TransformationMethod;
85import android.text.method.TransformationMethod2;
86import android.text.method.WordIterator;
87import android.text.style.ClickableSpan;
88import android.text.style.EasyEditSpan;
89import android.text.style.ParagraphStyle;
90import android.text.style.SpellCheckSpan;
91import android.text.style.SuggestionRangeSpan;
92import android.text.style.SuggestionSpan;
93import android.text.style.TextAppearanceSpan;
94import android.text.style.URLSpan;
95import android.text.style.UpdateAppearance;
96import android.text.util.Linkify;
97import android.util.AttributeSet;
98import android.util.DisplayMetrics;
99import android.util.FloatMath;
100import android.util.Log;
101import android.util.TypedValue;
102import android.view.ActionMode;
103import android.view.ActionMode.Callback;
104import android.view.DragEvent;
105import android.view.Gravity;
106import android.view.HapticFeedbackConstants;
107import android.view.KeyCharacterMap;
108import android.view.KeyEvent;
109import android.view.LayoutInflater;
110import android.view.Menu;
111import android.view.MenuItem;
112import android.view.MotionEvent;
113import android.view.View;
114import android.view.ViewConfiguration;
115import android.view.ViewDebug;
116import android.view.ViewGroup;
117import android.view.ViewGroup.LayoutParams;
118import android.view.ViewParent;
119import android.view.ViewRootImpl;
120import android.view.ViewTreeObserver;
121import android.view.WindowManager;
122import android.view.accessibility.AccessibilityEvent;
123import android.view.accessibility.AccessibilityManager;
124import android.view.accessibility.AccessibilityNodeInfo;
125import android.view.animation.AnimationUtils;
126import android.view.inputmethod.BaseInputConnection;
127import android.view.inputmethod.CompletionInfo;
128import android.view.inputmethod.CorrectionInfo;
129import android.view.inputmethod.EditorInfo;
130import android.view.inputmethod.ExtractedText;
131import android.view.inputmethod.ExtractedTextRequest;
132import android.view.inputmethod.InputConnection;
133import android.view.inputmethod.InputMethodManager;
134import android.view.textservice.SpellCheckerSubtype;
135import android.view.textservice.TextServicesManager;
136import android.widget.AdapterView.OnItemClickListener;
137import android.widget.RemoteViews.RemoteView;
138
139import com.android.internal.util.FastMath;
140import com.android.internal.widget.EditableInputConnection;
141
142import org.xmlpull.v1.XmlPullParserException;
143
144import java.io.IOException;
145import java.lang.ref.WeakReference;
146import java.text.BreakIterator;
147import java.util.ArrayList;
148import java.util.Arrays;
149import java.util.Comparator;
150import java.util.HashMap;
151import java.util.Locale;
152
153/**
154 * Displays text to the user and optionally allows them to edit it.  A TextView
155 * is a complete text editor, however the basic class is configured to not
156 * allow editing; see {@link EditText} for a subclass that configures the text
157 * view for editing.
158 *
159 * <p>
160 * <b>XML attributes</b>
161 * <p>
162 * See {@link android.R.styleable#TextView TextView Attributes},
163 * {@link android.R.styleable#View View Attributes}
164 *
165 * @attr ref android.R.styleable#TextView_text
166 * @attr ref android.R.styleable#TextView_bufferType
167 * @attr ref android.R.styleable#TextView_hint
168 * @attr ref android.R.styleable#TextView_textColor
169 * @attr ref android.R.styleable#TextView_textColorHighlight
170 * @attr ref android.R.styleable#TextView_textColorHint
171 * @attr ref android.R.styleable#TextView_textAppearance
172 * @attr ref android.R.styleable#TextView_textColorLink
173 * @attr ref android.R.styleable#TextView_textSize
174 * @attr ref android.R.styleable#TextView_textScaleX
175 * @attr ref android.R.styleable#TextView_typeface
176 * @attr ref android.R.styleable#TextView_textStyle
177 * @attr ref android.R.styleable#TextView_cursorVisible
178 * @attr ref android.R.styleable#TextView_maxLines
179 * @attr ref android.R.styleable#TextView_maxHeight
180 * @attr ref android.R.styleable#TextView_lines
181 * @attr ref android.R.styleable#TextView_height
182 * @attr ref android.R.styleable#TextView_minLines
183 * @attr ref android.R.styleable#TextView_minHeight
184 * @attr ref android.R.styleable#TextView_maxEms
185 * @attr ref android.R.styleable#TextView_maxWidth
186 * @attr ref android.R.styleable#TextView_ems
187 * @attr ref android.R.styleable#TextView_width
188 * @attr ref android.R.styleable#TextView_minEms
189 * @attr ref android.R.styleable#TextView_minWidth
190 * @attr ref android.R.styleable#TextView_gravity
191 * @attr ref android.R.styleable#TextView_scrollHorizontally
192 * @attr ref android.R.styleable#TextView_password
193 * @attr ref android.R.styleable#TextView_singleLine
194 * @attr ref android.R.styleable#TextView_selectAllOnFocus
195 * @attr ref android.R.styleable#TextView_includeFontPadding
196 * @attr ref android.R.styleable#TextView_maxLength
197 * @attr ref android.R.styleable#TextView_shadowColor
198 * @attr ref android.R.styleable#TextView_shadowDx
199 * @attr ref android.R.styleable#TextView_shadowDy
200 * @attr ref android.R.styleable#TextView_shadowRadius
201 * @attr ref android.R.styleable#TextView_autoLink
202 * @attr ref android.R.styleable#TextView_linksClickable
203 * @attr ref android.R.styleable#TextView_numeric
204 * @attr ref android.R.styleable#TextView_digits
205 * @attr ref android.R.styleable#TextView_phoneNumber
206 * @attr ref android.R.styleable#TextView_inputMethod
207 * @attr ref android.R.styleable#TextView_capitalize
208 * @attr ref android.R.styleable#TextView_autoText
209 * @attr ref android.R.styleable#TextView_editable
210 * @attr ref android.R.styleable#TextView_freezesText
211 * @attr ref android.R.styleable#TextView_ellipsize
212 * @attr ref android.R.styleable#TextView_drawableTop
213 * @attr ref android.R.styleable#TextView_drawableBottom
214 * @attr ref android.R.styleable#TextView_drawableRight
215 * @attr ref android.R.styleable#TextView_drawableLeft
216 * @attr ref android.R.styleable#TextView_drawablePadding
217 * @attr ref android.R.styleable#TextView_lineSpacingExtra
218 * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
219 * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
220 * @attr ref android.R.styleable#TextView_inputType
221 * @attr ref android.R.styleable#TextView_imeOptions
222 * @attr ref android.R.styleable#TextView_privateImeOptions
223 * @attr ref android.R.styleable#TextView_imeActionLabel
224 * @attr ref android.R.styleable#TextView_imeActionId
225 * @attr ref android.R.styleable#TextView_editorExtras
226 */
227@RemoteView
228public class TextView extends View implements ViewTreeObserver.OnPreDrawListener {
229    static final String LOG_TAG = "TextView";
230    static final boolean DEBUG_EXTRACT = false;
231
232    private static final int PRIORITY = 100;
233    private int mCurrentAlpha = 255;
234
235    final int[] mTempCoords = new int[2];
236    Rect mTempRect;
237
238    private ColorStateList mTextColor;
239    private int mCurTextColor;
240    private ColorStateList mHintTextColor;
241    private ColorStateList mLinkTextColor;
242    private int mCurHintTextColor;
243    private boolean mFreezesText;
244    private boolean mFrozenWithFocus;
245    private boolean mTemporaryDetach;
246    private boolean mDispatchTemporaryDetach;
247
248    private boolean mDiscardNextActionUp = false;
249    private boolean mIgnoreActionUpEvent = false;
250
251    private Editable.Factory mEditableFactory = Editable.Factory.getInstance();
252    private Spannable.Factory mSpannableFactory = Spannable.Factory.getInstance();
253
254    private float mShadowRadius, mShadowDx, mShadowDy;
255
256    private static final int PREDRAW_NOT_REGISTERED = 0;
257    private static final int PREDRAW_PENDING = 1;
258    private static final int PREDRAW_DONE = 2;
259    private int mPreDrawState = PREDRAW_NOT_REGISTERED;
260
261    private TextUtils.TruncateAt mEllipsize = null;
262
263    // Enum for the "typeface" XML parameter.
264    // TODO: How can we get this from the XML instead of hardcoding it here?
265    private static final int SANS = 1;
266    private static final int SERIF = 2;
267    private static final int MONOSPACE = 3;
268
269    // Bitfield for the "numeric" XML parameter.
270    // TODO: How can we get this from the XML instead of hardcoding it here?
271    private static final int SIGNED = 2;
272    private static final int DECIMAL = 4;
273
274    static class Drawables {
275        final Rect mCompoundRect = new Rect();
276        Drawable mDrawableTop, mDrawableBottom, mDrawableLeft, mDrawableRight,
277                mDrawableStart, mDrawableEnd;
278        int mDrawableSizeTop, mDrawableSizeBottom, mDrawableSizeLeft, mDrawableSizeRight,
279                mDrawableSizeStart, mDrawableSizeEnd;
280        int mDrawableWidthTop, mDrawableWidthBottom, mDrawableHeightLeft, mDrawableHeightRight,
281                mDrawableHeightStart, mDrawableHeightEnd;
282        int mDrawablePadding;
283    }
284    private Drawables mDrawables;
285
286    private CharSequence mError;
287    private boolean mErrorWasChanged;
288    private ErrorPopup mPopup;
289    /**
290     * This flag is set if the TextView tries to display an error before it
291     * is attached to the window (so its position is still unknown).
292     * It causes the error to be shown later, when onAttachedToWindow()
293     * is called.
294     */
295    private boolean mShowErrorAfterAttach;
296
297    private CharWrapper mCharWrapper = null;
298
299    private boolean mSelectionMoved = false;
300    private boolean mTouchFocusSelected = false;
301
302    private Marquee mMarquee;
303    private boolean mRestartMarquee;
304
305    private int mMarqueeRepeatLimit = 3;
306
307    static class InputContentType {
308        int imeOptions = EditorInfo.IME_NULL;
309        String privateImeOptions;
310        CharSequence imeActionLabel;
311        int imeActionId;
312        Bundle extras;
313        OnEditorActionListener onEditorActionListener;
314        boolean enterDown;
315    }
316    InputContentType mInputContentType;
317
318    static class InputMethodState {
319        Rect mCursorRectInWindow = new Rect();
320        RectF mTmpRectF = new RectF();
321        float[] mTmpOffset = new float[2];
322        ExtractedTextRequest mExtracting;
323        final ExtractedText mTmpExtracted = new ExtractedText();
324        int mBatchEditNesting;
325        boolean mCursorChanged;
326        boolean mSelectionModeChanged;
327        boolean mContentChanged;
328        int mChangedStart, mChangedEnd, mChangedDelta;
329    }
330    InputMethodState mInputMethodState;
331
332    private int mTextSelectHandleLeftRes;
333    private int mTextSelectHandleRightRes;
334    private int mTextSelectHandleRes;
335
336    private int mTextEditSuggestionItemLayout;
337    private SuggestionsPopupWindow mSuggestionsPopupWindow;
338    private SuggestionRangeSpan mSuggestionRangeSpan;
339
340    private int mCursorDrawableRes;
341    private final Drawable[] mCursorDrawable = new Drawable[2];
342    private int mCursorCount; // Actual current number of used mCursorDrawable: 0, 1 or 2
343
344    private Drawable mSelectHandleLeft;
345    private Drawable mSelectHandleRight;
346    private Drawable mSelectHandleCenter;
347
348    // Global listener that detects changes in the global position of the TextView
349    private PositionListener mPositionListener;
350
351    private float mLastDownPositionX, mLastDownPositionY;
352    private Callback mCustomSelectionActionModeCallback;
353
354    private final int mSquaredTouchSlopDistance;
355    // Set when this TextView gained focus with some text selected. Will start selection mode.
356    private boolean mCreatedWithASelection = false;
357
358    private WordIterator mWordIterator;
359
360    private SpellChecker mSpellChecker;
361
362    private boolean mSoftInputShownOnFocus = true;
363
364    // The alignment to pass to Layout, or null if not resolved.
365    private Layout.Alignment mLayoutAlignment;
366
367    // The default value for mTextAlign.
368    private TextAlign mTextAlign = TextAlign.INHERIT;
369
370    private static enum TextAlign {
371        INHERIT, GRAVITY, TEXT_START, TEXT_END, CENTER, VIEW_START, VIEW_END;
372    }
373
374    private boolean mResolvedDrawables = false;
375
376    /**
377     * On some devices the fading edges add a performance penalty if used
378     * extensively in the same layout. This mode indicates how the marquee
379     * is currently being shown, if applicable. (mEllipsize will == MARQUEE)
380     */
381    private int mMarqueeFadeMode = MARQUEE_FADE_NORMAL;
382
383    /**
384     * When mMarqueeFadeMode is not MARQUEE_FADE_NORMAL, this stores
385     * the layout that should be used when the mode switches.
386     */
387    private Layout mSavedMarqueeModeLayout;
388
389    /**
390     * Draw marquee text with fading edges as usual
391     */
392    private static final int MARQUEE_FADE_NORMAL = 0;
393
394    /**
395     * Draw marquee text as ellipsize end while inactive instead of with the fade.
396     * (Useful for devices where the fade can be expensive if overdone)
397     */
398    private static final int MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS = 1;
399
400    /**
401     * Draw marquee text with fading edges because it is currently active/animating.
402     */
403    private static final int MARQUEE_FADE_SWITCH_SHOW_FADE = 2;
404
405    /*
406     * Kick-start the font cache for the zygote process (to pay the cost of
407     * initializing freetype for our default font only once).
408     */
409    static {
410        Paint p = new Paint();
411        p.setAntiAlias(true);
412        // We don't care about the result, just the side-effect of measuring.
413        p.measureText("H");
414    }
415
416    /**
417     * Interface definition for a callback to be invoked when an action is
418     * performed on the editor.
419     */
420    public interface OnEditorActionListener {
421        /**
422         * Called when an action is being performed.
423         *
424         * @param v The view that was clicked.
425         * @param actionId Identifier of the action.  This will be either the
426         * identifier you supplied, or {@link EditorInfo#IME_NULL
427         * EditorInfo.IME_NULL} if being called due to the enter key
428         * being pressed.
429         * @param event If triggered by an enter key, this is the event;
430         * otherwise, this is null.
431         * @return Return true if you have consumed the action, else false.
432         */
433        boolean onEditorAction(TextView v, int actionId, KeyEvent event);
434    }
435
436    public TextView(Context context) {
437        this(context, null);
438    }
439
440    public TextView(Context context,
441                    AttributeSet attrs) {
442        this(context, attrs, com.android.internal.R.attr.textViewStyle);
443    }
444
445    @SuppressWarnings("deprecation")
446    public TextView(Context context,
447                    AttributeSet attrs,
448                    int defStyle) {
449        super(context, attrs, defStyle);
450        mText = "";
451
452        final Resources res = getResources();
453        final CompatibilityInfo compat = res.getCompatibilityInfo();
454
455        mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
456        mTextPaint.density = res.getDisplayMetrics().density;
457        mTextPaint.setCompatibilityScaling(compat.applicationScale);
458
459        // If we get the paint from the skin, we should set it to left, since
460        // the layout always wants it to be left.
461        // mTextPaint.setTextAlign(Paint.Align.LEFT);
462
463        mHighlightPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
464        mHighlightPaint.setCompatibilityScaling(compat.applicationScale);
465
466        mMovement = getDefaultMovementMethod();
467        mTransformation = null;
468
469        int textColorHighlight = 0;
470        ColorStateList textColor = null;
471        ColorStateList textColorHint = null;
472        ColorStateList textColorLink = null;
473        int textSize = 15;
474        int typefaceIndex = -1;
475        int styleIndex = -1;
476        boolean allCaps = false;
477
478        final Resources.Theme theme = context.getTheme();
479
480        /*
481         * Look the appearance up without checking first if it exists because
482         * almost every TextView has one and it greatly simplifies the logic
483         * to be able to parse the appearance first and then let specific tags
484         * for this View override it.
485         */
486        TypedArray a = theme.obtainStyledAttributes(
487                    attrs, com.android.internal.R.styleable.TextViewAppearance, defStyle, 0);
488        TypedArray appearance = null;
489        int ap = a.getResourceId(
490                com.android.internal.R.styleable.TextViewAppearance_textAppearance, -1);
491        a.recycle();
492        if (ap != -1) {
493            appearance = theme.obtainStyledAttributes(
494                    ap, com.android.internal.R.styleable.TextAppearance);
495        }
496        if (appearance != null) {
497            int n = appearance.getIndexCount();
498            for (int i = 0; i < n; i++) {
499                int attr = appearance.getIndex(i);
500
501                switch (attr) {
502                case com.android.internal.R.styleable.TextAppearance_textColorHighlight:
503                    textColorHighlight = appearance.getColor(attr, textColorHighlight);
504                    break;
505
506                case com.android.internal.R.styleable.TextAppearance_textColor:
507                    textColor = appearance.getColorStateList(attr);
508                    break;
509
510                case com.android.internal.R.styleable.TextAppearance_textColorHint:
511                    textColorHint = appearance.getColorStateList(attr);
512                    break;
513
514                case com.android.internal.R.styleable.TextAppearance_textColorLink:
515                    textColorLink = appearance.getColorStateList(attr);
516                    break;
517
518                case com.android.internal.R.styleable.TextAppearance_textSize:
519                    textSize = appearance.getDimensionPixelSize(attr, textSize);
520                    break;
521
522                case com.android.internal.R.styleable.TextAppearance_typeface:
523                    typefaceIndex = appearance.getInt(attr, -1);
524                    break;
525
526                case com.android.internal.R.styleable.TextAppearance_textStyle:
527                    styleIndex = appearance.getInt(attr, -1);
528                    break;
529
530                case com.android.internal.R.styleable.TextAppearance_textAllCaps:
531                    allCaps = appearance.getBoolean(attr, false);
532                    break;
533                }
534            }
535
536            appearance.recycle();
537        }
538
539        boolean editable = getDefaultEditable();
540        CharSequence inputMethod = null;
541        int numeric = 0;
542        CharSequence digits = null;
543        boolean phone = false;
544        boolean autotext = false;
545        int autocap = -1;
546        int buffertype = 0;
547        boolean selectallonfocus = false;
548        Drawable drawableLeft = null, drawableTop = null, drawableRight = null,
549            drawableBottom = null, drawableStart = null, drawableEnd = null;
550        int drawablePadding = 0;
551        int ellipsize = -1;
552        boolean singleLine = false;
553        int maxlength = -1;
554        CharSequence text = "";
555        CharSequence hint = null;
556        int shadowcolor = 0;
557        float dx = 0, dy = 0, r = 0;
558        boolean password = false;
559        int inputType = EditorInfo.TYPE_NULL;
560
561        a = theme.obtainStyledAttributes(
562                    attrs, com.android.internal.R.styleable.TextView, defStyle, 0);
563
564        int n = a.getIndexCount();
565        for (int i = 0; i < n; i++) {
566            int attr = a.getIndex(i);
567
568            switch (attr) {
569            case com.android.internal.R.styleable.TextView_editable:
570                editable = a.getBoolean(attr, editable);
571                break;
572
573            case com.android.internal.R.styleable.TextView_inputMethod:
574                inputMethod = a.getText(attr);
575                break;
576
577            case com.android.internal.R.styleable.TextView_numeric:
578                numeric = a.getInt(attr, numeric);
579                break;
580
581            case com.android.internal.R.styleable.TextView_digits:
582                digits = a.getText(attr);
583                break;
584
585            case com.android.internal.R.styleable.TextView_phoneNumber:
586                phone = a.getBoolean(attr, phone);
587                break;
588
589            case com.android.internal.R.styleable.TextView_autoText:
590                autotext = a.getBoolean(attr, autotext);
591                break;
592
593            case com.android.internal.R.styleable.TextView_capitalize:
594                autocap = a.getInt(attr, autocap);
595                break;
596
597            case com.android.internal.R.styleable.TextView_bufferType:
598                buffertype = a.getInt(attr, buffertype);
599                break;
600
601            case com.android.internal.R.styleable.TextView_selectAllOnFocus:
602                selectallonfocus = a.getBoolean(attr, selectallonfocus);
603                break;
604
605            case com.android.internal.R.styleable.TextView_autoLink:
606                mAutoLinkMask = a.getInt(attr, 0);
607                break;
608
609            case com.android.internal.R.styleable.TextView_linksClickable:
610                mLinksClickable = a.getBoolean(attr, true);
611                break;
612
613//            TODO uncomment when this attribute is made public in the next release
614//                 also add TextView_showSoftInputOnFocus to the list of attributes above
615//            case com.android.internal.R.styleable.TextView_showSoftInputOnFocus:
616//                setShowSoftInputOnFocus(a.getBoolean(attr, true));
617//                break;
618
619            case com.android.internal.R.styleable.TextView_drawableLeft:
620                drawableLeft = a.getDrawable(attr);
621                break;
622
623            case com.android.internal.R.styleable.TextView_drawableTop:
624                drawableTop = a.getDrawable(attr);
625                break;
626
627            case com.android.internal.R.styleable.TextView_drawableRight:
628                drawableRight = a.getDrawable(attr);
629                break;
630
631            case com.android.internal.R.styleable.TextView_drawableBottom:
632                drawableBottom = a.getDrawable(attr);
633                break;
634
635            case com.android.internal.R.styleable.TextView_drawableStart:
636                drawableStart = a.getDrawable(attr);
637                break;
638
639            case com.android.internal.R.styleable.TextView_drawableEnd:
640                drawableEnd = a.getDrawable(attr);
641                break;
642
643            case com.android.internal.R.styleable.TextView_drawablePadding:
644                drawablePadding = a.getDimensionPixelSize(attr, drawablePadding);
645                break;
646
647            case com.android.internal.R.styleable.TextView_maxLines:
648                setMaxLines(a.getInt(attr, -1));
649                break;
650
651            case com.android.internal.R.styleable.TextView_maxHeight:
652                setMaxHeight(a.getDimensionPixelSize(attr, -1));
653                break;
654
655            case com.android.internal.R.styleable.TextView_lines:
656                setLines(a.getInt(attr, -1));
657                break;
658
659            case com.android.internal.R.styleable.TextView_height:
660                setHeight(a.getDimensionPixelSize(attr, -1));
661                break;
662
663            case com.android.internal.R.styleable.TextView_minLines:
664                setMinLines(a.getInt(attr, -1));
665                break;
666
667            case com.android.internal.R.styleable.TextView_minHeight:
668                setMinHeight(a.getDimensionPixelSize(attr, -1));
669                break;
670
671            case com.android.internal.R.styleable.TextView_maxEms:
672                setMaxEms(a.getInt(attr, -1));
673                break;
674
675            case com.android.internal.R.styleable.TextView_maxWidth:
676                setMaxWidth(a.getDimensionPixelSize(attr, -1));
677                break;
678
679            case com.android.internal.R.styleable.TextView_ems:
680                setEms(a.getInt(attr, -1));
681                break;
682
683            case com.android.internal.R.styleable.TextView_width:
684                setWidth(a.getDimensionPixelSize(attr, -1));
685                break;
686
687            case com.android.internal.R.styleable.TextView_minEms:
688                setMinEms(a.getInt(attr, -1));
689                break;
690
691            case com.android.internal.R.styleable.TextView_minWidth:
692                setMinWidth(a.getDimensionPixelSize(attr, -1));
693                break;
694
695            case com.android.internal.R.styleable.TextView_gravity:
696                setGravity(a.getInt(attr, -1));
697                break;
698
699            case com.android.internal.R.styleable.TextView_hint:
700                hint = a.getText(attr);
701                break;
702
703            case com.android.internal.R.styleable.TextView_text:
704                text = a.getText(attr);
705                break;
706
707            case com.android.internal.R.styleable.TextView_scrollHorizontally:
708                if (a.getBoolean(attr, false)) {
709                    setHorizontallyScrolling(true);
710                }
711                break;
712
713            case com.android.internal.R.styleable.TextView_singleLine:
714                singleLine = a.getBoolean(attr, singleLine);
715                break;
716
717            case com.android.internal.R.styleable.TextView_ellipsize:
718                ellipsize = a.getInt(attr, ellipsize);
719                break;
720
721            case com.android.internal.R.styleable.TextView_marqueeRepeatLimit:
722                setMarqueeRepeatLimit(a.getInt(attr, mMarqueeRepeatLimit));
723                break;
724
725            case com.android.internal.R.styleable.TextView_includeFontPadding:
726                if (!a.getBoolean(attr, true)) {
727                    setIncludeFontPadding(false);
728                }
729                break;
730
731            case com.android.internal.R.styleable.TextView_cursorVisible:
732                if (!a.getBoolean(attr, true)) {
733                    setCursorVisible(false);
734                }
735                break;
736
737            case com.android.internal.R.styleable.TextView_maxLength:
738                maxlength = a.getInt(attr, -1);
739                break;
740
741            case com.android.internal.R.styleable.TextView_textScaleX:
742                setTextScaleX(a.getFloat(attr, 1.0f));
743                break;
744
745            case com.android.internal.R.styleable.TextView_freezesText:
746                mFreezesText = a.getBoolean(attr, false);
747                break;
748
749            case com.android.internal.R.styleable.TextView_shadowColor:
750                shadowcolor = a.getInt(attr, 0);
751                break;
752
753            case com.android.internal.R.styleable.TextView_shadowDx:
754                dx = a.getFloat(attr, 0);
755                break;
756
757            case com.android.internal.R.styleable.TextView_shadowDy:
758                dy = a.getFloat(attr, 0);
759                break;
760
761            case com.android.internal.R.styleable.TextView_shadowRadius:
762                r = a.getFloat(attr, 0);
763                break;
764
765            case com.android.internal.R.styleable.TextView_enabled:
766                setEnabled(a.getBoolean(attr, isEnabled()));
767                break;
768
769            case com.android.internal.R.styleable.TextView_textColorHighlight:
770                textColorHighlight = a.getColor(attr, textColorHighlight);
771                break;
772
773            case com.android.internal.R.styleable.TextView_textColor:
774                textColor = a.getColorStateList(attr);
775                break;
776
777            case com.android.internal.R.styleable.TextView_textColorHint:
778                textColorHint = a.getColorStateList(attr);
779                break;
780
781            case com.android.internal.R.styleable.TextView_textColorLink:
782                textColorLink = a.getColorStateList(attr);
783                break;
784
785            case com.android.internal.R.styleable.TextView_textSize:
786                textSize = a.getDimensionPixelSize(attr, textSize);
787                break;
788
789            case com.android.internal.R.styleable.TextView_typeface:
790                typefaceIndex = a.getInt(attr, typefaceIndex);
791                break;
792
793            case com.android.internal.R.styleable.TextView_textStyle:
794                styleIndex = a.getInt(attr, styleIndex);
795                break;
796
797            case com.android.internal.R.styleable.TextView_password:
798                password = a.getBoolean(attr, password);
799                break;
800
801            case com.android.internal.R.styleable.TextView_lineSpacingExtra:
802                mSpacingAdd = a.getDimensionPixelSize(attr, (int) mSpacingAdd);
803                break;
804
805            case com.android.internal.R.styleable.TextView_lineSpacingMultiplier:
806                mSpacingMult = a.getFloat(attr, mSpacingMult);
807                break;
808
809            case com.android.internal.R.styleable.TextView_inputType:
810                inputType = a.getInt(attr, mInputType);
811                break;
812
813            case com.android.internal.R.styleable.TextView_imeOptions:
814                if (mInputContentType == null) {
815                    mInputContentType = new InputContentType();
816                }
817                mInputContentType.imeOptions = a.getInt(attr,
818                        mInputContentType.imeOptions);
819                break;
820
821            case com.android.internal.R.styleable.TextView_imeActionLabel:
822                if (mInputContentType == null) {
823                    mInputContentType = new InputContentType();
824                }
825                mInputContentType.imeActionLabel = a.getText(attr);
826                break;
827
828            case com.android.internal.R.styleable.TextView_imeActionId:
829                if (mInputContentType == null) {
830                    mInputContentType = new InputContentType();
831                }
832                mInputContentType.imeActionId = a.getInt(attr,
833                        mInputContentType.imeActionId);
834                break;
835
836            case com.android.internal.R.styleable.TextView_privateImeOptions:
837                setPrivateImeOptions(a.getString(attr));
838                break;
839
840            case com.android.internal.R.styleable.TextView_editorExtras:
841                try {
842                    setInputExtras(a.getResourceId(attr, 0));
843                } catch (XmlPullParserException e) {
844                    Log.w(LOG_TAG, "Failure reading input extras", e);
845                } catch (IOException e) {
846                    Log.w(LOG_TAG, "Failure reading input extras", e);
847                }
848                break;
849
850            case com.android.internal.R.styleable.TextView_textCursorDrawable:
851                mCursorDrawableRes = a.getResourceId(attr, 0);
852                break;
853
854            case com.android.internal.R.styleable.TextView_textSelectHandleLeft:
855                mTextSelectHandleLeftRes = a.getResourceId(attr, 0);
856                break;
857
858            case com.android.internal.R.styleable.TextView_textSelectHandleRight:
859                mTextSelectHandleRightRes = a.getResourceId(attr, 0);
860                break;
861
862            case com.android.internal.R.styleable.TextView_textSelectHandle:
863                mTextSelectHandleRes = a.getResourceId(attr, 0);
864                break;
865
866            case com.android.internal.R.styleable.TextView_textEditSuggestionItemLayout:
867                mTextEditSuggestionItemLayout = a.getResourceId(attr, 0);
868                break;
869
870            case com.android.internal.R.styleable.TextView_textIsSelectable:
871                mTextIsSelectable = a.getBoolean(attr, false);
872                break;
873
874            case com.android.internal.R.styleable.TextView_textAllCaps:
875                allCaps = a.getBoolean(attr, false);
876                break;
877            }
878        }
879        a.recycle();
880
881        BufferType bufferType = BufferType.EDITABLE;
882
883        final int variation =
884                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
885        final boolean passwordInputType = variation
886                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD);
887        final boolean webPasswordInputType = variation
888                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD);
889        final boolean numberPasswordInputType = variation
890                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
891
892        if (inputMethod != null) {
893            Class<?> c;
894
895            try {
896                c = Class.forName(inputMethod.toString());
897            } catch (ClassNotFoundException ex) {
898                throw new RuntimeException(ex);
899            }
900
901            try {
902                mInput = (KeyListener) c.newInstance();
903            } catch (InstantiationException ex) {
904                throw new RuntimeException(ex);
905            } catch (IllegalAccessException ex) {
906                throw new RuntimeException(ex);
907            }
908            try {
909                mInputType = inputType != EditorInfo.TYPE_NULL
910                        ? inputType
911                        : mInput.getInputType();
912            } catch (IncompatibleClassChangeError e) {
913                mInputType = EditorInfo.TYPE_CLASS_TEXT;
914            }
915        } else if (digits != null) {
916            mInput = DigitsKeyListener.getInstance(digits.toString());
917            // If no input type was specified, we will default to generic
918            // text, since we can't tell the IME about the set of digits
919            // that was selected.
920            mInputType = inputType != EditorInfo.TYPE_NULL
921                    ? inputType : EditorInfo.TYPE_CLASS_TEXT;
922        } else if (inputType != EditorInfo.TYPE_NULL) {
923            setInputType(inputType, true);
924            // If set, the input type overrides what was set using the deprecated singleLine flag.
925            singleLine = !isMultilineInputType(inputType);
926        } else if (phone) {
927            mInput = DialerKeyListener.getInstance();
928            mInputType = inputType = EditorInfo.TYPE_CLASS_PHONE;
929        } else if (numeric != 0) {
930            mInput = DigitsKeyListener.getInstance((numeric & SIGNED) != 0,
931                                                   (numeric & DECIMAL) != 0);
932            inputType = EditorInfo.TYPE_CLASS_NUMBER;
933            if ((numeric & SIGNED) != 0) {
934                inputType |= EditorInfo.TYPE_NUMBER_FLAG_SIGNED;
935            }
936            if ((numeric & DECIMAL) != 0) {
937                inputType |= EditorInfo.TYPE_NUMBER_FLAG_DECIMAL;
938            }
939            mInputType = inputType;
940        } else if (autotext || autocap != -1) {
941            TextKeyListener.Capitalize cap;
942
943            inputType = EditorInfo.TYPE_CLASS_TEXT;
944
945            switch (autocap) {
946            case 1:
947                cap = TextKeyListener.Capitalize.SENTENCES;
948                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES;
949                break;
950
951            case 2:
952                cap = TextKeyListener.Capitalize.WORDS;
953                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS;
954                break;
955
956            case 3:
957                cap = TextKeyListener.Capitalize.CHARACTERS;
958                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS;
959                break;
960
961            default:
962                cap = TextKeyListener.Capitalize.NONE;
963                break;
964            }
965
966            mInput = TextKeyListener.getInstance(autotext, cap);
967            mInputType = inputType;
968        } else if (mTextIsSelectable) {
969            // Prevent text changes from keyboard.
970            mInputType = EditorInfo.TYPE_NULL;
971            mInput = null;
972            bufferType = BufferType.SPANNABLE;
973            // Required to request focus while in touch mode.
974            setFocusableInTouchMode(true);
975            // So that selection can be changed using arrow keys and touch is handled.
976            setMovementMethod(ArrowKeyMovementMethod.getInstance());
977        } else if (editable) {
978            mInput = TextKeyListener.getInstance();
979            mInputType = EditorInfo.TYPE_CLASS_TEXT;
980        } else {
981            mInput = null;
982
983            switch (buffertype) {
984                case 0:
985                    bufferType = BufferType.NORMAL;
986                    break;
987                case 1:
988                    bufferType = BufferType.SPANNABLE;
989                    break;
990                case 2:
991                    bufferType = BufferType.EDITABLE;
992                    break;
993            }
994        }
995
996        // mInputType has been set from inputType, possibly modified by mInputMethod.
997        // Specialize mInputType to [web]password if we have a text class and the original input
998        // type was a password.
999        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
1000            if (password || passwordInputType) {
1001                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
1002                        | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD;
1003            }
1004            if (webPasswordInputType) {
1005                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
1006                        | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD;
1007            }
1008        } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) {
1009            if (numberPasswordInputType) {
1010                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
1011                        | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD;
1012            }
1013        }
1014
1015        if (selectallonfocus) {
1016            mSelectAllOnFocus = true;
1017
1018            if (bufferType == BufferType.NORMAL)
1019                bufferType = BufferType.SPANNABLE;
1020        }
1021
1022        setCompoundDrawablesWithIntrinsicBounds(
1023            drawableLeft, drawableTop, drawableRight, drawableBottom);
1024        setRelativeDrawablesIfNeeded(drawableStart, drawableEnd);
1025        setCompoundDrawablePadding(drawablePadding);
1026
1027        // Same as setSingleLine(), but make sure the transformation method and the maximum number
1028        // of lines of height are unchanged for multi-line TextViews.
1029        setInputTypeSingleLine(singleLine);
1030        applySingleLine(singleLine, singleLine, singleLine);
1031
1032        if (singleLine && mInput == null && ellipsize < 0) {
1033                ellipsize = 3; // END
1034        }
1035
1036        switch (ellipsize) {
1037            case 1:
1038                setEllipsize(TextUtils.TruncateAt.START);
1039                break;
1040            case 2:
1041                setEllipsize(TextUtils.TruncateAt.MIDDLE);
1042                break;
1043            case 3:
1044                setEllipsize(TextUtils.TruncateAt.END);
1045                break;
1046            case 4:
1047                if (ViewConfiguration.get(context).isFadingMarqueeEnabled()) {
1048                    setHorizontalFadingEdgeEnabled(true);
1049                    mMarqueeFadeMode = MARQUEE_FADE_NORMAL;
1050                } else {
1051                    setHorizontalFadingEdgeEnabled(false);
1052                    mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
1053                }
1054                setEllipsize(TextUtils.TruncateAt.MARQUEE);
1055                break;
1056        }
1057
1058        setTextColor(textColor != null ? textColor : ColorStateList.valueOf(0xFF000000));
1059        setHintTextColor(textColorHint);
1060        setLinkTextColor(textColorLink);
1061        if (textColorHighlight != 0) {
1062            setHighlightColor(textColorHighlight);
1063        }
1064        setRawTextSize(textSize);
1065
1066        if (allCaps) {
1067            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
1068        }
1069
1070        if (password || passwordInputType || webPasswordInputType || numberPasswordInputType) {
1071            setTransformationMethod(PasswordTransformationMethod.getInstance());
1072            typefaceIndex = MONOSPACE;
1073        } else if ((mInputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION))
1074                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)) {
1075            typefaceIndex = MONOSPACE;
1076        }
1077
1078        setTypefaceByIndex(typefaceIndex, styleIndex);
1079
1080        if (shadowcolor != 0) {
1081            setShadowLayer(r, dx, dy, shadowcolor);
1082        }
1083
1084        if (maxlength >= 0) {
1085            setFilters(new InputFilter[] { new InputFilter.LengthFilter(maxlength) });
1086        } else {
1087            setFilters(NO_FILTERS);
1088        }
1089
1090        setText(text, bufferType);
1091        if (hint != null) setHint(hint);
1092
1093        /*
1094         * Views are not normally focusable unless specified to be.
1095         * However, TextViews that have input or movement methods *are*
1096         * focusable by default.
1097         */
1098        a = context.obtainStyledAttributes(attrs,
1099                                           com.android.internal.R.styleable.View,
1100                                           defStyle, 0);
1101
1102        boolean focusable = mMovement != null || mInput != null;
1103        boolean clickable = focusable;
1104        boolean longClickable = focusable;
1105
1106        n = a.getIndexCount();
1107        for (int i = 0; i < n; i++) {
1108            int attr = a.getIndex(i);
1109
1110            switch (attr) {
1111            case com.android.internal.R.styleable.View_focusable:
1112                focusable = a.getBoolean(attr, focusable);
1113                break;
1114
1115            case com.android.internal.R.styleable.View_clickable:
1116                clickable = a.getBoolean(attr, clickable);
1117                break;
1118
1119            case com.android.internal.R.styleable.View_longClickable:
1120                longClickable = a.getBoolean(attr, longClickable);
1121                break;
1122            }
1123        }
1124        a.recycle();
1125
1126        setFocusable(focusable);
1127        setClickable(clickable);
1128        setLongClickable(longClickable);
1129
1130        prepareCursorControllers();
1131
1132        final ViewConfiguration viewConfiguration = ViewConfiguration.get(context);
1133        final int touchSlop = viewConfiguration.getScaledTouchSlop();
1134        mSquaredTouchSlopDistance = touchSlop * touchSlop;
1135    }
1136
1137    private void setTypefaceByIndex(int typefaceIndex, int styleIndex) {
1138        Typeface tf = null;
1139        switch (typefaceIndex) {
1140            case SANS:
1141                tf = Typeface.SANS_SERIF;
1142                break;
1143
1144            case SERIF:
1145                tf = Typeface.SERIF;
1146                break;
1147
1148            case MONOSPACE:
1149                tf = Typeface.MONOSPACE;
1150                break;
1151        }
1152
1153        setTypeface(tf, styleIndex);
1154    }
1155
1156    private void setRelativeDrawablesIfNeeded(Drawable start, Drawable end) {
1157        boolean hasRelativeDrawables = (start != null) || (end != null);
1158        if (hasRelativeDrawables) {
1159            Drawables dr = mDrawables;
1160            if (dr == null) {
1161                mDrawables = dr = new Drawables();
1162            }
1163            final Rect compoundRect = dr.mCompoundRect;
1164            int[] state = getDrawableState();
1165            if (start != null) {
1166                start.setBounds(0, 0, start.getIntrinsicWidth(), start.getIntrinsicHeight());
1167                start.setState(state);
1168                start.copyBounds(compoundRect);
1169                start.setCallback(this);
1170
1171                dr.mDrawableStart = start;
1172                dr.mDrawableSizeStart = compoundRect.width();
1173                dr.mDrawableHeightStart = compoundRect.height();
1174            } else {
1175                dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1176            }
1177            if (end != null) {
1178                end.setBounds(0, 0, end.getIntrinsicWidth(), end.getIntrinsicHeight());
1179                end.setState(state);
1180                end.copyBounds(compoundRect);
1181                end.setCallback(this);
1182
1183                dr.mDrawableEnd = end;
1184                dr.mDrawableSizeEnd = compoundRect.width();
1185                dr.mDrawableHeightEnd = compoundRect.height();
1186            } else {
1187                dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1188            }
1189        }
1190    }
1191
1192    @Override
1193    public void setEnabled(boolean enabled) {
1194        if (enabled == isEnabled()) {
1195            return;
1196        }
1197
1198        if (!enabled) {
1199            // Hide the soft input if the currently active TextView is disabled
1200            InputMethodManager imm = InputMethodManager.peekInstance();
1201            if (imm != null && imm.isActive(this)) {
1202                imm.hideSoftInputFromWindow(getWindowToken(), 0);
1203            }
1204        }
1205        super.setEnabled(enabled);
1206        prepareCursorControllers();
1207        if (enabled) {
1208            // Make sure IME is updated with current editor info.
1209            InputMethodManager imm = InputMethodManager.peekInstance();
1210            if (imm != null) imm.restartInput(this);
1211        }
1212
1213        // start or stop the cursor blinking as appropriate
1214        makeBlink();
1215    }
1216
1217    /**
1218     * Sets the typeface and style in which the text should be displayed,
1219     * and turns on the fake bold and italic bits in the Paint if the
1220     * Typeface that you provided does not have all the bits in the
1221     * style that you specified.
1222     *
1223     * @attr ref android.R.styleable#TextView_typeface
1224     * @attr ref android.R.styleable#TextView_textStyle
1225     */
1226    public void setTypeface(Typeface tf, int style) {
1227        if (style > 0) {
1228            if (tf == null) {
1229                tf = Typeface.defaultFromStyle(style);
1230            } else {
1231                tf = Typeface.create(tf, style);
1232            }
1233
1234            setTypeface(tf);
1235            // now compute what (if any) algorithmic styling is needed
1236            int typefaceStyle = tf != null ? tf.getStyle() : 0;
1237            int need = style & ~typefaceStyle;
1238            mTextPaint.setFakeBoldText((need & Typeface.BOLD) != 0);
1239            mTextPaint.setTextSkewX((need & Typeface.ITALIC) != 0 ? -0.25f : 0);
1240        } else {
1241            mTextPaint.setFakeBoldText(false);
1242            mTextPaint.setTextSkewX(0);
1243            setTypeface(tf);
1244        }
1245    }
1246
1247    /**
1248     * Subclasses override this to specify that they have a KeyListener
1249     * by default even if not specifically called for in the XML options.
1250     */
1251    protected boolean getDefaultEditable() {
1252        return false;
1253    }
1254
1255    /**
1256     * Subclasses override this to specify a default movement method.
1257     */
1258    protected MovementMethod getDefaultMovementMethod() {
1259        return null;
1260    }
1261
1262    /**
1263     * Return the text the TextView is displaying. If setText() was called with
1264     * an argument of BufferType.SPANNABLE or BufferType.EDITABLE, you can cast
1265     * the return value from this method to Spannable or Editable, respectively.
1266     *
1267     * Note: The content of the return value should not be modified. If you want
1268     * a modifiable one, you should make your own copy first.
1269     */
1270    @ViewDebug.CapturedViewProperty
1271    public CharSequence getText() {
1272        return mText;
1273    }
1274
1275    /**
1276     * Returns the length, in characters, of the text managed by this TextView
1277     */
1278    public int length() {
1279        return mText.length();
1280    }
1281
1282    /**
1283     * Return the text the TextView is displaying as an Editable object.  If
1284     * the text is not editable, null is returned.
1285     *
1286     * @see #getText
1287     */
1288    public Editable getEditableText() {
1289        return (mText instanceof Editable) ? (Editable)mText : null;
1290    }
1291
1292    /**
1293     * @return the height of one standard line in pixels.  Note that markup
1294     * within the text can cause individual lines to be taller or shorter
1295     * than this height, and the layout may contain additional first-
1296     * or last-line padding.
1297     */
1298    public int getLineHeight() {
1299        return FastMath.round(mTextPaint.getFontMetricsInt(null) * mSpacingMult + mSpacingAdd);
1300    }
1301
1302    /**
1303     * @return the Layout that is currently being used to display the text.
1304     * This can be null if the text or width has recently changes.
1305     */
1306    public final Layout getLayout() {
1307        return mLayout;
1308    }
1309
1310    /**
1311     * @return the current key listener for this TextView.
1312     * This will frequently be null for non-EditText TextViews.
1313     */
1314    public final KeyListener getKeyListener() {
1315        return mInput;
1316    }
1317
1318    /**
1319     * Sets the key listener to be used with this TextView.  This can be null
1320     * to disallow user input.  Note that this method has significant and
1321     * subtle interactions with soft keyboards and other input method:
1322     * see {@link KeyListener#getInputType() KeyListener.getContentType()}
1323     * for important details.  Calling this method will replace the current
1324     * content type of the text view with the content type returned by the
1325     * key listener.
1326     * <p>
1327     * Be warned that if you want a TextView with a key listener or movement
1328     * method not to be focusable, or if you want a TextView without a
1329     * key listener or movement method to be focusable, you must call
1330     * {@link #setFocusable} again after calling this to get the focusability
1331     * back the way you want it.
1332     *
1333     * @attr ref android.R.styleable#TextView_numeric
1334     * @attr ref android.R.styleable#TextView_digits
1335     * @attr ref android.R.styleable#TextView_phoneNumber
1336     * @attr ref android.R.styleable#TextView_inputMethod
1337     * @attr ref android.R.styleable#TextView_capitalize
1338     * @attr ref android.R.styleable#TextView_autoText
1339     */
1340    public void setKeyListener(KeyListener input) {
1341        setKeyListenerOnly(input);
1342        fixFocusableAndClickableSettings();
1343
1344        if (input != null) {
1345            try {
1346                mInputType = mInput.getInputType();
1347            } catch (IncompatibleClassChangeError e) {
1348                mInputType = EditorInfo.TYPE_CLASS_TEXT;
1349            }
1350            // Change inputType, without affecting transformation.
1351            // No need to applySingleLine since mSingleLine is unchanged.
1352            setInputTypeSingleLine(mSingleLine);
1353        } else {
1354            mInputType = EditorInfo.TYPE_NULL;
1355        }
1356
1357        InputMethodManager imm = InputMethodManager.peekInstance();
1358        if (imm != null) imm.restartInput(this);
1359    }
1360
1361    private void setKeyListenerOnly(KeyListener input) {
1362        mInput = input;
1363        if (mInput != null && !(mText instanceof Editable))
1364            setText(mText);
1365
1366        setFilters((Editable) mText, mFilters);
1367    }
1368
1369    /**
1370     * @return the movement method being used for this TextView.
1371     * This will frequently be null for non-EditText TextViews.
1372     */
1373    public final MovementMethod getMovementMethod() {
1374        return mMovement;
1375    }
1376
1377    /**
1378     * Sets the movement method (arrow key handler) to be used for
1379     * this TextView.  This can be null to disallow using the arrow keys
1380     * to move the cursor or scroll the view.
1381     * <p>
1382     * Be warned that if you want a TextView with a key listener or movement
1383     * method not to be focusable, or if you want a TextView without a
1384     * key listener or movement method to be focusable, you must call
1385     * {@link #setFocusable} again after calling this to get the focusability
1386     * back the way you want it.
1387     */
1388    public final void setMovementMethod(MovementMethod movement) {
1389        mMovement = movement;
1390
1391        if (mMovement != null && !(mText instanceof Spannable))
1392            setText(mText);
1393
1394        fixFocusableAndClickableSettings();
1395
1396        // SelectionModifierCursorController depends on textCanBeSelected, which depends on mMovement
1397        prepareCursorControllers();
1398    }
1399
1400    private void fixFocusableAndClickableSettings() {
1401        if ((mMovement != null) || mInput != null) {
1402            setFocusable(true);
1403            setClickable(true);
1404            setLongClickable(true);
1405        } else {
1406            setFocusable(false);
1407            setClickable(false);
1408            setLongClickable(false);
1409        }
1410    }
1411
1412    /**
1413     * @return the current transformation method for this TextView.
1414     * This will frequently be null except for single-line and password
1415     * fields.
1416     */
1417    public final TransformationMethod getTransformationMethod() {
1418        return mTransformation;
1419    }
1420
1421    /**
1422     * Sets the transformation that is applied to the text that this
1423     * TextView is displaying.
1424     *
1425     * @attr ref android.R.styleable#TextView_password
1426     * @attr ref android.R.styleable#TextView_singleLine
1427     */
1428    public final void setTransformationMethod(TransformationMethod method) {
1429        if (method == mTransformation) {
1430            // Avoid the setText() below if the transformation is
1431            // the same.
1432            return;
1433        }
1434        if (mTransformation != null) {
1435            if (mText instanceof Spannable) {
1436                ((Spannable) mText).removeSpan(mTransformation);
1437            }
1438        }
1439
1440        mTransformation = method;
1441
1442        if (method instanceof TransformationMethod2) {
1443            TransformationMethod2 method2 = (TransformationMethod2) method;
1444            mAllowTransformationLengthChange = !mTextIsSelectable && !(mText instanceof Editable);
1445            method2.setLengthChangesAllowed(mAllowTransformationLengthChange);
1446        } else {
1447            mAllowTransformationLengthChange = false;
1448        }
1449
1450        setText(mText);
1451    }
1452
1453    /**
1454     * Returns the top padding of the view, plus space for the top
1455     * Drawable if any.
1456     */
1457    public int getCompoundPaddingTop() {
1458        final Drawables dr = mDrawables;
1459        if (dr == null || dr.mDrawableTop == null) {
1460            return mPaddingTop;
1461        } else {
1462            return mPaddingTop + dr.mDrawablePadding + dr.mDrawableSizeTop;
1463        }
1464    }
1465
1466    /**
1467     * Returns the bottom padding of the view, plus space for the bottom
1468     * Drawable if any.
1469     */
1470    public int getCompoundPaddingBottom() {
1471        final Drawables dr = mDrawables;
1472        if (dr == null || dr.mDrawableBottom == null) {
1473            return mPaddingBottom;
1474        } else {
1475            return mPaddingBottom + dr.mDrawablePadding + dr.mDrawableSizeBottom;
1476        }
1477    }
1478
1479    /**
1480     * Returns the left padding of the view, plus space for the left
1481     * Drawable if any.
1482     */
1483    public int getCompoundPaddingLeft() {
1484        final Drawables dr = mDrawables;
1485        if (dr == null || dr.mDrawableLeft == null) {
1486            return mPaddingLeft;
1487        } else {
1488            return mPaddingLeft + dr.mDrawablePadding + dr.mDrawableSizeLeft;
1489        }
1490    }
1491
1492    /**
1493     * Returns the right padding of the view, plus space for the right
1494     * Drawable if any.
1495     */
1496    public int getCompoundPaddingRight() {
1497        final Drawables dr = mDrawables;
1498        if (dr == null || dr.mDrawableRight == null) {
1499            return mPaddingRight;
1500        } else {
1501            return mPaddingRight + dr.mDrawablePadding + dr.mDrawableSizeRight;
1502        }
1503    }
1504
1505    /**
1506     * Returns the start padding of the view, plus space for the start
1507     * Drawable if any.
1508     *
1509     * @hide
1510     */
1511    public int getCompoundPaddingStart() {
1512        resolveDrawables();
1513        switch(getResolvedLayoutDirection()) {
1514            default:
1515            case LAYOUT_DIRECTION_LTR:
1516                return getCompoundPaddingLeft();
1517            case LAYOUT_DIRECTION_RTL:
1518                return getCompoundPaddingRight();
1519        }
1520    }
1521
1522    /**
1523     * Returns the end padding of the view, plus space for the end
1524     * Drawable if any.
1525     *
1526     * @hide
1527     */
1528    public int getCompoundPaddingEnd() {
1529        resolveDrawables();
1530        switch(getResolvedLayoutDirection()) {
1531            default:
1532            case LAYOUT_DIRECTION_LTR:
1533                return getCompoundPaddingRight();
1534            case LAYOUT_DIRECTION_RTL:
1535                return getCompoundPaddingLeft();
1536        }
1537    }
1538
1539    /**
1540     * Returns the extended top padding of the view, including both the
1541     * top Drawable if any and any extra space to keep more than maxLines
1542     * of text from showing.  It is only valid to call this after measuring.
1543     */
1544    public int getExtendedPaddingTop() {
1545        if (mMaxMode != LINES) {
1546            return getCompoundPaddingTop();
1547        }
1548
1549        if (mLayout.getLineCount() <= mMaximum) {
1550            return getCompoundPaddingTop();
1551        }
1552
1553        int top = getCompoundPaddingTop();
1554        int bottom = getCompoundPaddingBottom();
1555        int viewht = getHeight() - top - bottom;
1556        int layoutht = mLayout.getLineTop(mMaximum);
1557
1558        if (layoutht >= viewht) {
1559            return top;
1560        }
1561
1562        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1563        if (gravity == Gravity.TOP) {
1564            return top;
1565        } else if (gravity == Gravity.BOTTOM) {
1566            return top + viewht - layoutht;
1567        } else { // (gravity == Gravity.CENTER_VERTICAL)
1568            return top + (viewht - layoutht) / 2;
1569        }
1570    }
1571
1572    /**
1573     * Returns the extended bottom padding of the view, including both the
1574     * bottom Drawable if any and any extra space to keep more than maxLines
1575     * of text from showing.  It is only valid to call this after measuring.
1576     */
1577    public int getExtendedPaddingBottom() {
1578        if (mMaxMode != LINES) {
1579            return getCompoundPaddingBottom();
1580        }
1581
1582        if (mLayout.getLineCount() <= mMaximum) {
1583            return getCompoundPaddingBottom();
1584        }
1585
1586        int top = getCompoundPaddingTop();
1587        int bottom = getCompoundPaddingBottom();
1588        int viewht = getHeight() - top - bottom;
1589        int layoutht = mLayout.getLineTop(mMaximum);
1590
1591        if (layoutht >= viewht) {
1592            return bottom;
1593        }
1594
1595        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1596        if (gravity == Gravity.TOP) {
1597            return bottom + viewht - layoutht;
1598        } else if (gravity == Gravity.BOTTOM) {
1599            return bottom;
1600        } else { // (gravity == Gravity.CENTER_VERTICAL)
1601            return bottom + (viewht - layoutht) / 2;
1602        }
1603    }
1604
1605    /**
1606     * Returns the total left padding of the view, including the left
1607     * Drawable if any.
1608     */
1609    public int getTotalPaddingLeft() {
1610        return getCompoundPaddingLeft();
1611    }
1612
1613    /**
1614     * Returns the total right padding of the view, including the right
1615     * Drawable if any.
1616     */
1617    public int getTotalPaddingRight() {
1618        return getCompoundPaddingRight();
1619    }
1620
1621    /**
1622     * Returns the total start padding of the view, including the start
1623     * Drawable if any.
1624     *
1625     * @hide
1626     */
1627    public int getTotalPaddingStart() {
1628        return getCompoundPaddingStart();
1629    }
1630
1631    /**
1632     * Returns the total end padding of the view, including the end
1633     * Drawable if any.
1634     *
1635     * @hide
1636     */
1637    public int getTotalPaddingEnd() {
1638        return getCompoundPaddingEnd();
1639    }
1640
1641    /**
1642     * Returns the total top padding of the view, including the top
1643     * Drawable if any, the extra space to keep more than maxLines
1644     * from showing, and the vertical offset for gravity, if any.
1645     */
1646    public int getTotalPaddingTop() {
1647        return getExtendedPaddingTop() + getVerticalOffset(true);
1648    }
1649
1650    /**
1651     * Returns the total bottom padding of the view, including the bottom
1652     * Drawable if any, the extra space to keep more than maxLines
1653     * from showing, and the vertical offset for gravity, if any.
1654     */
1655    public int getTotalPaddingBottom() {
1656        return getExtendedPaddingBottom() + getBottomVerticalOffset(true);
1657    }
1658
1659    /**
1660     * Sets the Drawables (if any) to appear to the left of, above,
1661     * to the right of, and below the text.  Use null if you do not
1662     * want a Drawable there.  The Drawables must already have had
1663     * {@link Drawable#setBounds} called.
1664     *
1665     * @attr ref android.R.styleable#TextView_drawableLeft
1666     * @attr ref android.R.styleable#TextView_drawableTop
1667     * @attr ref android.R.styleable#TextView_drawableRight
1668     * @attr ref android.R.styleable#TextView_drawableBottom
1669     */
1670    public void setCompoundDrawables(Drawable left, Drawable top,
1671                                     Drawable right, Drawable bottom) {
1672        Drawables dr = mDrawables;
1673
1674        final boolean drawables = left != null || top != null
1675                || right != null || bottom != null;
1676
1677        if (!drawables) {
1678            // Clearing drawables...  can we free the data structure?
1679            if (dr != null) {
1680                if (dr.mDrawablePadding == 0) {
1681                    mDrawables = null;
1682                } else {
1683                    // We need to retain the last set padding, so just clear
1684                    // out all of the fields in the existing structure.
1685                    if (dr.mDrawableLeft != null) dr.mDrawableLeft.setCallback(null);
1686                    dr.mDrawableLeft = null;
1687                    if (dr.mDrawableTop != null) dr.mDrawableTop.setCallback(null);
1688                    dr.mDrawableTop = null;
1689                    if (dr.mDrawableRight != null) dr.mDrawableRight.setCallback(null);
1690                    dr.mDrawableRight = null;
1691                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.setCallback(null);
1692                    dr.mDrawableBottom = null;
1693                    dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1694                    dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1695                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1696                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1697                }
1698            }
1699        } else {
1700            if (dr == null) {
1701                mDrawables = dr = new Drawables();
1702            }
1703
1704            if (dr.mDrawableLeft != left && dr.mDrawableLeft != null) {
1705                dr.mDrawableLeft.setCallback(null);
1706            }
1707            dr.mDrawableLeft = left;
1708
1709            if (dr.mDrawableTop != top && dr.mDrawableTop != null) {
1710                dr.mDrawableTop.setCallback(null);
1711            }
1712            dr.mDrawableTop = top;
1713
1714            if (dr.mDrawableRight != right && dr.mDrawableRight != null) {
1715                dr.mDrawableRight.setCallback(null);
1716            }
1717            dr.mDrawableRight = right;
1718
1719            if (dr.mDrawableBottom != bottom && dr.mDrawableBottom != null) {
1720                dr.mDrawableBottom.setCallback(null);
1721            }
1722            dr.mDrawableBottom = bottom;
1723
1724            final Rect compoundRect = dr.mCompoundRect;
1725            int[] state;
1726
1727            state = getDrawableState();
1728
1729            if (left != null) {
1730                left.setState(state);
1731                left.copyBounds(compoundRect);
1732                left.setCallback(this);
1733                dr.mDrawableSizeLeft = compoundRect.width();
1734                dr.mDrawableHeightLeft = compoundRect.height();
1735            } else {
1736                dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1737            }
1738
1739            if (right != null) {
1740                right.setState(state);
1741                right.copyBounds(compoundRect);
1742                right.setCallback(this);
1743                dr.mDrawableSizeRight = compoundRect.width();
1744                dr.mDrawableHeightRight = compoundRect.height();
1745            } else {
1746                dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1747            }
1748
1749            if (top != null) {
1750                top.setState(state);
1751                top.copyBounds(compoundRect);
1752                top.setCallback(this);
1753                dr.mDrawableSizeTop = compoundRect.height();
1754                dr.mDrawableWidthTop = compoundRect.width();
1755            } else {
1756                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1757            }
1758
1759            if (bottom != null) {
1760                bottom.setState(state);
1761                bottom.copyBounds(compoundRect);
1762                bottom.setCallback(this);
1763                dr.mDrawableSizeBottom = compoundRect.height();
1764                dr.mDrawableWidthBottom = compoundRect.width();
1765            } else {
1766                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1767            }
1768        }
1769
1770        invalidate();
1771        requestLayout();
1772    }
1773
1774    /**
1775     * Sets the Drawables (if any) to appear to the left of, above,
1776     * to the right of, and below the text.  Use 0 if you do not
1777     * want a Drawable there. The Drawables' bounds will be set to
1778     * their intrinsic bounds.
1779     *
1780     * @param left Resource identifier of the left Drawable.
1781     * @param top Resource identifier of the top Drawable.
1782     * @param right Resource identifier of the right Drawable.
1783     * @param bottom Resource identifier of the bottom Drawable.
1784     *
1785     * @attr ref android.R.styleable#TextView_drawableLeft
1786     * @attr ref android.R.styleable#TextView_drawableTop
1787     * @attr ref android.R.styleable#TextView_drawableRight
1788     * @attr ref android.R.styleable#TextView_drawableBottom
1789     */
1790    public void setCompoundDrawablesWithIntrinsicBounds(int left, int top, int right, int bottom) {
1791        final Resources resources = getContext().getResources();
1792        setCompoundDrawablesWithIntrinsicBounds(left != 0 ? resources.getDrawable(left) : null,
1793                top != 0 ? resources.getDrawable(top) : null,
1794                right != 0 ? resources.getDrawable(right) : null,
1795                bottom != 0 ? resources.getDrawable(bottom) : null);
1796    }
1797
1798    /**
1799     * Sets the Drawables (if any) to appear to the left of, above,
1800     * to the right of, and below the text.  Use null if you do not
1801     * want a Drawable there. The Drawables' bounds will be set to
1802     * their intrinsic bounds.
1803     *
1804     * @attr ref android.R.styleable#TextView_drawableLeft
1805     * @attr ref android.R.styleable#TextView_drawableTop
1806     * @attr ref android.R.styleable#TextView_drawableRight
1807     * @attr ref android.R.styleable#TextView_drawableBottom
1808     */
1809    public void setCompoundDrawablesWithIntrinsicBounds(Drawable left, Drawable top,
1810            Drawable right, Drawable bottom) {
1811
1812        if (left != null) {
1813            left.setBounds(0, 0, left.getIntrinsicWidth(), left.getIntrinsicHeight());
1814        }
1815        if (right != null) {
1816            right.setBounds(0, 0, right.getIntrinsicWidth(), right.getIntrinsicHeight());
1817        }
1818        if (top != null) {
1819            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
1820        }
1821        if (bottom != null) {
1822            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
1823        }
1824        setCompoundDrawables(left, top, right, bottom);
1825    }
1826
1827    /**
1828     * Sets the Drawables (if any) to appear to the start of, above,
1829     * to the end of, and below the text.  Use null if you do not
1830     * want a Drawable there.  The Drawables must already have had
1831     * {@link Drawable#setBounds} called.
1832     *
1833     * @attr ref android.R.styleable#TextView_drawableStart
1834     * @attr ref android.R.styleable#TextView_drawableTop
1835     * @attr ref android.R.styleable#TextView_drawableEnd
1836     * @attr ref android.R.styleable#TextView_drawableBottom
1837     *
1838     * @hide
1839     */
1840    public void setCompoundDrawablesRelative(Drawable start, Drawable top,
1841                                     Drawable end, Drawable bottom) {
1842        Drawables dr = mDrawables;
1843
1844        final boolean drawables = start != null || top != null
1845                || end != null || bottom != null;
1846
1847        if (!drawables) {
1848            // Clearing drawables...  can we free the data structure?
1849            if (dr != null) {
1850                if (dr.mDrawablePadding == 0) {
1851                    mDrawables = null;
1852                } else {
1853                    // We need to retain the last set padding, so just clear
1854                    // out all of the fields in the existing structure.
1855                    if (dr.mDrawableStart != null) dr.mDrawableStart.setCallback(null);
1856                    dr.mDrawableStart = null;
1857                    if (dr.mDrawableTop != null) dr.mDrawableTop.setCallback(null);
1858                    dr.mDrawableTop = null;
1859                    if (dr.mDrawableEnd != null) dr.mDrawableEnd.setCallback(null);
1860                    dr.mDrawableEnd = null;
1861                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.setCallback(null);
1862                    dr.mDrawableBottom = null;
1863                    dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1864                    dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1865                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1866                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1867                }
1868            }
1869        } else {
1870            if (dr == null) {
1871                mDrawables = dr = new Drawables();
1872            }
1873
1874            if (dr.mDrawableStart != start && dr.mDrawableStart != null) {
1875                dr.mDrawableStart.setCallback(null);
1876            }
1877            dr.mDrawableStart = start;
1878
1879            if (dr.mDrawableTop != top && dr.mDrawableTop != null) {
1880                dr.mDrawableTop.setCallback(null);
1881            }
1882            dr.mDrawableTop = top;
1883
1884            if (dr.mDrawableEnd != end && dr.mDrawableEnd != null) {
1885                dr.mDrawableEnd.setCallback(null);
1886            }
1887            dr.mDrawableEnd = end;
1888
1889            if (dr.mDrawableBottom != bottom && dr.mDrawableBottom != null) {
1890                dr.mDrawableBottom.setCallback(null);
1891            }
1892            dr.mDrawableBottom = bottom;
1893
1894            final Rect compoundRect = dr.mCompoundRect;
1895            int[] state;
1896
1897            state = getDrawableState();
1898
1899            if (start != null) {
1900                start.setState(state);
1901                start.copyBounds(compoundRect);
1902                start.setCallback(this);
1903                dr.mDrawableSizeStart = compoundRect.width();
1904                dr.mDrawableHeightStart = compoundRect.height();
1905            } else {
1906                dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1907            }
1908
1909            if (end != null) {
1910                end.setState(state);
1911                end.copyBounds(compoundRect);
1912                end.setCallback(this);
1913                dr.mDrawableSizeEnd = compoundRect.width();
1914                dr.mDrawableHeightEnd = compoundRect.height();
1915            } else {
1916                dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1917            }
1918
1919            if (top != null) {
1920                top.setState(state);
1921                top.copyBounds(compoundRect);
1922                top.setCallback(this);
1923                dr.mDrawableSizeTop = compoundRect.height();
1924                dr.mDrawableWidthTop = compoundRect.width();
1925            } else {
1926                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1927            }
1928
1929            if (bottom != null) {
1930                bottom.setState(state);
1931                bottom.copyBounds(compoundRect);
1932                bottom.setCallback(this);
1933                dr.mDrawableSizeBottom = compoundRect.height();
1934                dr.mDrawableWidthBottom = compoundRect.width();
1935            } else {
1936                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1937            }
1938        }
1939
1940        resolveDrawables();
1941        invalidate();
1942        requestLayout();
1943    }
1944
1945    /**
1946     * Sets the Drawables (if any) to appear to the start of, above,
1947     * to the end of, and below the text.  Use 0 if you do not
1948     * want a Drawable there. The Drawables' bounds will be set to
1949     * their intrinsic bounds.
1950     *
1951     * @param start Resource identifier of the start Drawable.
1952     * @param top Resource identifier of the top Drawable.
1953     * @param end Resource identifier of the end Drawable.
1954     * @param bottom Resource identifier of the bottom Drawable.
1955     *
1956     * @attr ref android.R.styleable#TextView_drawableStart
1957     * @attr ref android.R.styleable#TextView_drawableTop
1958     * @attr ref android.R.styleable#TextView_drawableEnd
1959     * @attr ref android.R.styleable#TextView_drawableBottom
1960     *
1961     * @hide
1962     */
1963    public void setCompoundDrawablesRelativeWithIntrinsicBounds(int start, int top, int end,
1964            int bottom) {
1965        resetResolvedDrawables();
1966        final Resources resources = getContext().getResources();
1967        setCompoundDrawablesRelativeWithIntrinsicBounds(
1968                start != 0 ? resources.getDrawable(start) : null,
1969                top != 0 ? resources.getDrawable(top) : null,
1970                end != 0 ? resources.getDrawable(end) : null,
1971                bottom != 0 ? resources.getDrawable(bottom) : null);
1972    }
1973
1974    /**
1975     * Sets the Drawables (if any) to appear to the start of, above,
1976     * to the end of, and below the text.  Use null if you do not
1977     * want a Drawable there. The Drawables' bounds will be set to
1978     * their intrinsic bounds.
1979     *
1980     * @attr ref android.R.styleable#TextView_drawableStart
1981     * @attr ref android.R.styleable#TextView_drawableTop
1982     * @attr ref android.R.styleable#TextView_drawableEnd
1983     * @attr ref android.R.styleable#TextView_drawableBottom
1984     *
1985     * @hide
1986     */
1987    public void setCompoundDrawablesRelativeWithIntrinsicBounds(Drawable start, Drawable top,
1988            Drawable end, Drawable bottom) {
1989
1990        resetResolvedDrawables();
1991        if (start != null) {
1992            start.setBounds(0, 0, start.getIntrinsicWidth(), start.getIntrinsicHeight());
1993        }
1994        if (end != null) {
1995            end.setBounds(0, 0, end.getIntrinsicWidth(), end.getIntrinsicHeight());
1996        }
1997        if (top != null) {
1998            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
1999        }
2000        if (bottom != null) {
2001            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
2002        }
2003        setCompoundDrawablesRelative(start, top, end, bottom);
2004    }
2005
2006    /**
2007     * Returns drawables for the left, top, right, and bottom borders.
2008     */
2009    public Drawable[] getCompoundDrawables() {
2010        final Drawables dr = mDrawables;
2011        if (dr != null) {
2012            return new Drawable[] {
2013                dr.mDrawableLeft, dr.mDrawableTop, dr.mDrawableRight, dr.mDrawableBottom
2014            };
2015        } else {
2016            return new Drawable[] { null, null, null, null };
2017        }
2018    }
2019
2020    /**
2021     * Returns drawables for the start, top, end, and bottom borders.
2022     *
2023     * @hide
2024     */
2025    public Drawable[] getCompoundDrawablesRelative() {
2026        final Drawables dr = mDrawables;
2027        if (dr != null) {
2028            return new Drawable[] {
2029                dr.mDrawableStart, dr.mDrawableTop, dr.mDrawableEnd, dr.mDrawableBottom
2030            };
2031        } else {
2032            return new Drawable[] { null, null, null, null };
2033        }
2034    }
2035
2036    /**
2037     * Sets the size of the padding between the compound drawables and
2038     * the text.
2039     *
2040     * @attr ref android.R.styleable#TextView_drawablePadding
2041     */
2042    public void setCompoundDrawablePadding(int pad) {
2043        Drawables dr = mDrawables;
2044        if (pad == 0) {
2045            if (dr != null) {
2046                dr.mDrawablePadding = pad;
2047            }
2048        } else {
2049            if (dr == null) {
2050                mDrawables = dr = new Drawables();
2051            }
2052            dr.mDrawablePadding = pad;
2053        }
2054
2055        invalidate();
2056        requestLayout();
2057    }
2058
2059    /**
2060     * Returns the padding between the compound drawables and the text.
2061     */
2062    public int getCompoundDrawablePadding() {
2063        final Drawables dr = mDrawables;
2064        return dr != null ? dr.mDrawablePadding : 0;
2065    }
2066
2067    @Override
2068    public void setPadding(int left, int top, int right, int bottom) {
2069        if (left != mPaddingLeft ||
2070            right != mPaddingRight ||
2071            top != mPaddingTop ||
2072            bottom != mPaddingBottom) {
2073            nullLayouts();
2074        }
2075
2076        // the super call will requestLayout()
2077        super.setPadding(left, top, right, bottom);
2078        invalidate();
2079    }
2080
2081    /**
2082     * Gets the autolink mask of the text.  See {@link
2083     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
2084     * possible values.
2085     *
2086     * @attr ref android.R.styleable#TextView_autoLink
2087     */
2088    public final int getAutoLinkMask() {
2089        return mAutoLinkMask;
2090    }
2091
2092    /**
2093     * Sets the text color, size, style, hint color, and highlight color
2094     * from the specified TextAppearance resource.
2095     */
2096    public void setTextAppearance(Context context, int resid) {
2097        TypedArray appearance =
2098            context.obtainStyledAttributes(resid,
2099                                           com.android.internal.R.styleable.TextAppearance);
2100
2101        int color;
2102        ColorStateList colors;
2103        int ts;
2104
2105        color = appearance.getColor(com.android.internal.R.styleable.TextAppearance_textColorHighlight, 0);
2106        if (color != 0) {
2107            setHighlightColor(color);
2108        }
2109
2110        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2111                                              TextAppearance_textColor);
2112        if (colors != null) {
2113            setTextColor(colors);
2114        }
2115
2116        ts = appearance.getDimensionPixelSize(com.android.internal.R.styleable.
2117                                              TextAppearance_textSize, 0);
2118        if (ts != 0) {
2119            setRawTextSize(ts);
2120        }
2121
2122        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2123                                              TextAppearance_textColorHint);
2124        if (colors != null) {
2125            setHintTextColor(colors);
2126        }
2127
2128        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2129                                              TextAppearance_textColorLink);
2130        if (colors != null) {
2131            setLinkTextColor(colors);
2132        }
2133
2134        int typefaceIndex, styleIndex;
2135
2136        typefaceIndex = appearance.getInt(com.android.internal.R.styleable.
2137                                          TextAppearance_typeface, -1);
2138        styleIndex = appearance.getInt(com.android.internal.R.styleable.
2139                                       TextAppearance_textStyle, -1);
2140
2141        setTypefaceByIndex(typefaceIndex, styleIndex);
2142
2143        if (appearance.getBoolean(com.android.internal.R.styleable.TextAppearance_textAllCaps,
2144                false)) {
2145            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
2146        }
2147
2148        appearance.recycle();
2149    }
2150
2151    /**
2152     * @return the size (in pixels) of the default text size in this TextView.
2153     */
2154    public float getTextSize() {
2155        return mTextPaint.getTextSize();
2156    }
2157
2158    /**
2159     * Set the default text size to the given value, interpreted as "scaled
2160     * pixel" units.  This size is adjusted based on the current density and
2161     * user font size preference.
2162     *
2163     * @param size The scaled pixel size.
2164     *
2165     * @attr ref android.R.styleable#TextView_textSize
2166     */
2167    @android.view.RemotableViewMethod
2168    public void setTextSize(float size) {
2169        setTextSize(TypedValue.COMPLEX_UNIT_SP, size);
2170    }
2171
2172    /**
2173     * Set the default text size to a given unit and value.  See {@link
2174     * TypedValue} for the possible dimension units.
2175     *
2176     * @param unit The desired dimension unit.
2177     * @param size The desired size in the given units.
2178     *
2179     * @attr ref android.R.styleable#TextView_textSize
2180     */
2181    public void setTextSize(int unit, float size) {
2182        Context c = getContext();
2183        Resources r;
2184
2185        if (c == null)
2186            r = Resources.getSystem();
2187        else
2188            r = c.getResources();
2189
2190        setRawTextSize(TypedValue.applyDimension(
2191            unit, size, r.getDisplayMetrics()));
2192    }
2193
2194    private void setRawTextSize(float size) {
2195        if (size != mTextPaint.getTextSize()) {
2196            mTextPaint.setTextSize(size);
2197
2198            if (mLayout != null) {
2199                nullLayouts();
2200                requestLayout();
2201                invalidate();
2202            }
2203        }
2204    }
2205
2206    /**
2207     * @return the extent by which text is currently being stretched
2208     * horizontally.  This will usually be 1.
2209     */
2210    public float getTextScaleX() {
2211        return mTextPaint.getTextScaleX();
2212    }
2213
2214    /**
2215     * Sets the extent by which text should be stretched horizontally.
2216     *
2217     * @attr ref android.R.styleable#TextView_textScaleX
2218     */
2219    @android.view.RemotableViewMethod
2220    public void setTextScaleX(float size) {
2221        if (size != mTextPaint.getTextScaleX()) {
2222            mUserSetTextScaleX = true;
2223            mTextPaint.setTextScaleX(size);
2224
2225            if (mLayout != null) {
2226                nullLayouts();
2227                requestLayout();
2228                invalidate();
2229            }
2230        }
2231    }
2232
2233    /**
2234     * Sets the typeface and style in which the text should be displayed.
2235     * Note that not all Typeface families actually have bold and italic
2236     * variants, so you may need to use
2237     * {@link #setTypeface(Typeface, int)} to get the appearance
2238     * that you actually want.
2239     *
2240     * @attr ref android.R.styleable#TextView_typeface
2241     * @attr ref android.R.styleable#TextView_textStyle
2242     */
2243    public void setTypeface(Typeface tf) {
2244        if (mTextPaint.getTypeface() != tf) {
2245            mTextPaint.setTypeface(tf);
2246
2247            if (mLayout != null) {
2248                nullLayouts();
2249                requestLayout();
2250                invalidate();
2251            }
2252        }
2253    }
2254
2255    /**
2256     * @return the current typeface and style in which the text is being
2257     * displayed.
2258     */
2259    public Typeface getTypeface() {
2260        return mTextPaint.getTypeface();
2261    }
2262
2263    /**
2264     * Sets the text color for all the states (normal, selected,
2265     * focused) to be this color.
2266     *
2267     * @attr ref android.R.styleable#TextView_textColor
2268     */
2269    @android.view.RemotableViewMethod
2270    public void setTextColor(int color) {
2271        mTextColor = ColorStateList.valueOf(color);
2272        updateTextColors();
2273    }
2274
2275    /**
2276     * Sets the text color.
2277     *
2278     * @attr ref android.R.styleable#TextView_textColor
2279     */
2280    public void setTextColor(ColorStateList colors) {
2281        if (colors == null) {
2282            throw new NullPointerException();
2283        }
2284
2285        mTextColor = colors;
2286        updateTextColors();
2287    }
2288
2289    /**
2290     * Return the set of text colors.
2291     *
2292     * @return Returns the set of text colors.
2293     */
2294    public final ColorStateList getTextColors() {
2295        return mTextColor;
2296    }
2297
2298    /**
2299     * <p>Return the current color selected for normal text.</p>
2300     *
2301     * @return Returns the current text color.
2302     */
2303    public final int getCurrentTextColor() {
2304        return mCurTextColor;
2305    }
2306
2307    /**
2308     * Sets the color used to display the selection highlight.
2309     *
2310     * @attr ref android.R.styleable#TextView_textColorHighlight
2311     */
2312    @android.view.RemotableViewMethod
2313    public void setHighlightColor(int color) {
2314        if (mHighlightColor != color) {
2315            mHighlightColor = color;
2316            invalidate();
2317        }
2318    }
2319
2320    /**
2321     * Gives the text a shadow of the specified radius and color, the specified
2322     * distance from its normal position.
2323     *
2324     * @attr ref android.R.styleable#TextView_shadowColor
2325     * @attr ref android.R.styleable#TextView_shadowDx
2326     * @attr ref android.R.styleable#TextView_shadowDy
2327     * @attr ref android.R.styleable#TextView_shadowRadius
2328     */
2329    public void setShadowLayer(float radius, float dx, float dy, int color) {
2330        mTextPaint.setShadowLayer(radius, dx, dy, color);
2331
2332        mShadowRadius = radius;
2333        mShadowDx = dx;
2334        mShadowDy = dy;
2335
2336        invalidate();
2337    }
2338
2339    /**
2340     * @return the base paint used for the text.  Please use this only to
2341     * consult the Paint's properties and not to change them.
2342     */
2343    public TextPaint getPaint() {
2344        return mTextPaint;
2345    }
2346
2347    /**
2348     * Sets the autolink mask of the text.  See {@link
2349     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
2350     * possible values.
2351     *
2352     * @attr ref android.R.styleable#TextView_autoLink
2353     */
2354    @android.view.RemotableViewMethod
2355    public final void setAutoLinkMask(int mask) {
2356        mAutoLinkMask = mask;
2357    }
2358
2359    /**
2360     * Sets whether the movement method will automatically be set to
2361     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
2362     * set to nonzero and links are detected in {@link #setText}.
2363     * The default is true.
2364     *
2365     * @attr ref android.R.styleable#TextView_linksClickable
2366     */
2367    @android.view.RemotableViewMethod
2368    public final void setLinksClickable(boolean whether) {
2369        mLinksClickable = whether;
2370    }
2371
2372    /**
2373     * Returns whether the movement method will automatically be set to
2374     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
2375     * set to nonzero and links are detected in {@link #setText}.
2376     * The default is true.
2377     *
2378     * @attr ref android.R.styleable#TextView_linksClickable
2379     */
2380    public final boolean getLinksClickable() {
2381        return mLinksClickable;
2382    }
2383
2384    /**
2385     * Sets whether the soft input method will be made visible when this
2386     * TextView gets focused. The default is true.
2387     *
2388     * @attr ref android.R.styleable#TextView_softInputShownOnFocus
2389     * @hide
2390     */
2391    @android.view.RemotableViewMethod
2392    public final void setSoftInputShownOnFocus(boolean show) {
2393        mSoftInputShownOnFocus = show;
2394    }
2395
2396    /**
2397     * Returns whether the soft input method will be made visible when this
2398     * TextView gets focused. The default is true.
2399     *
2400     * @attr ref android.R.styleable#TextView_softInputShownOnFocus
2401     * @hide
2402     */
2403    public final boolean getSoftInputShownOnFocus() {
2404        return mSoftInputShownOnFocus;
2405    }
2406
2407    /**
2408     * Returns the list of URLSpans attached to the text
2409     * (by {@link Linkify} or otherwise) if any.  You can call
2410     * {@link URLSpan#getURL} on them to find where they link to
2411     * or use {@link Spanned#getSpanStart} and {@link Spanned#getSpanEnd}
2412     * to find the region of the text they are attached to.
2413     */
2414    public URLSpan[] getUrls() {
2415        if (mText instanceof Spanned) {
2416            return ((Spanned) mText).getSpans(0, mText.length(), URLSpan.class);
2417        } else {
2418            return new URLSpan[0];
2419        }
2420    }
2421
2422    /**
2423     * Sets the color of the hint text.
2424     *
2425     * @attr ref android.R.styleable#TextView_textColorHint
2426     */
2427    @android.view.RemotableViewMethod
2428    public final void setHintTextColor(int color) {
2429        mHintTextColor = ColorStateList.valueOf(color);
2430        updateTextColors();
2431    }
2432
2433    /**
2434     * Sets the color of the hint text.
2435     *
2436     * @attr ref android.R.styleable#TextView_textColorHint
2437     */
2438    public final void setHintTextColor(ColorStateList colors) {
2439        mHintTextColor = colors;
2440        updateTextColors();
2441    }
2442
2443    /**
2444     * <p>Return the color used to paint the hint text.</p>
2445     *
2446     * @return Returns the list of hint text colors.
2447     */
2448    public final ColorStateList getHintTextColors() {
2449        return mHintTextColor;
2450    }
2451
2452    /**
2453     * <p>Return the current color selected to paint the hint text.</p>
2454     *
2455     * @return Returns the current hint text color.
2456     */
2457    public final int getCurrentHintTextColor() {
2458        return mHintTextColor != null ? mCurHintTextColor : mCurTextColor;
2459    }
2460
2461    /**
2462     * Sets the color of links in the text.
2463     *
2464     * @attr ref android.R.styleable#TextView_textColorLink
2465     */
2466    @android.view.RemotableViewMethod
2467    public final void setLinkTextColor(int color) {
2468        mLinkTextColor = ColorStateList.valueOf(color);
2469        updateTextColors();
2470    }
2471
2472    /**
2473     * Sets the color of links in the text.
2474     *
2475     * @attr ref android.R.styleable#TextView_textColorLink
2476     */
2477    public final void setLinkTextColor(ColorStateList colors) {
2478        mLinkTextColor = colors;
2479        updateTextColors();
2480    }
2481
2482    /**
2483     * <p>Returns the color used to paint links in the text.</p>
2484     *
2485     * @return Returns the list of link text colors.
2486     */
2487    public final ColorStateList getLinkTextColors() {
2488        return mLinkTextColor;
2489    }
2490
2491    /**
2492     * Sets the horizontal alignment of the text and the
2493     * vertical gravity that will be used when there is extra space
2494     * in the TextView beyond what is required for the text itself.
2495     *
2496     * @see android.view.Gravity
2497     * @attr ref android.R.styleable#TextView_gravity
2498     */
2499    public void setGravity(int gravity) {
2500        if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) == 0) {
2501            gravity |= Gravity.START;
2502        }
2503        if ((gravity & Gravity.VERTICAL_GRAVITY_MASK) == 0) {
2504            gravity |= Gravity.TOP;
2505        }
2506
2507        boolean newLayout = false;
2508
2509        if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) !=
2510            (mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK)) {
2511            newLayout = true;
2512        }
2513
2514        if (gravity != mGravity) {
2515            invalidate();
2516            mLayoutAlignment = null;
2517        }
2518
2519        mGravity = gravity;
2520
2521        if (mLayout != null && newLayout) {
2522            // XXX this is heavy-handed because no actual content changes.
2523            int want = mLayout.getWidth();
2524            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
2525
2526            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
2527                          mRight - mLeft - getCompoundPaddingLeft() -
2528                          getCompoundPaddingRight(), true);
2529        }
2530    }
2531
2532    /**
2533     * Returns the horizontal and vertical alignment of this TextView.
2534     *
2535     * @see android.view.Gravity
2536     * @attr ref android.R.styleable#TextView_gravity
2537     */
2538    public int getGravity() {
2539        return mGravity;
2540    }
2541
2542    /**
2543     * @return the flags on the Paint being used to display the text.
2544     * @see Paint#getFlags
2545     */
2546    public int getPaintFlags() {
2547        return mTextPaint.getFlags();
2548    }
2549
2550    /**
2551     * Sets flags on the Paint being used to display the text and
2552     * reflows the text if they are different from the old flags.
2553     * @see Paint#setFlags
2554     */
2555    @android.view.RemotableViewMethod
2556    public void setPaintFlags(int flags) {
2557        if (mTextPaint.getFlags() != flags) {
2558            mTextPaint.setFlags(flags);
2559
2560            if (mLayout != null) {
2561                nullLayouts();
2562                requestLayout();
2563                invalidate();
2564            }
2565        }
2566    }
2567
2568    /**
2569     * Sets whether the text should be allowed to be wider than the
2570     * View is.  If false, it will be wrapped to the width of the View.
2571     *
2572     * @attr ref android.R.styleable#TextView_scrollHorizontally
2573     */
2574    public void setHorizontallyScrolling(boolean whether) {
2575        if (mHorizontallyScrolling != whether) {
2576            mHorizontallyScrolling = whether;
2577
2578            if (mLayout != null) {
2579                nullLayouts();
2580                requestLayout();
2581                invalidate();
2582            }
2583        }
2584    }
2585
2586    /**
2587     * Returns whether the text is allowed to be wider than the View is.
2588     * If false, the text will be wrapped to the width of the View.
2589     *
2590     * @attr ref android.R.styleable#TextView_scrollHorizontally
2591     * @hide
2592     */
2593    public boolean getHorizontallyScrolling() {
2594        return mHorizontallyScrolling;
2595    }
2596
2597    /**
2598     * Makes the TextView at least this many lines tall.
2599     *
2600     * Setting this value overrides any other (minimum) height setting. A single line TextView will
2601     * set this value to 1.
2602     *
2603     * @attr ref android.R.styleable#TextView_minLines
2604     */
2605    @android.view.RemotableViewMethod
2606    public void setMinLines(int minlines) {
2607        mMinimum = minlines;
2608        mMinMode = LINES;
2609
2610        requestLayout();
2611        invalidate();
2612    }
2613
2614    /**
2615     * Makes the TextView at least this many pixels tall.
2616     *
2617     * Setting this value overrides any other (minimum) number of lines setting.
2618     *
2619     * @attr ref android.R.styleable#TextView_minHeight
2620     */
2621    @android.view.RemotableViewMethod
2622    public void setMinHeight(int minHeight) {
2623        mMinimum = minHeight;
2624        mMinMode = PIXELS;
2625
2626        requestLayout();
2627        invalidate();
2628    }
2629
2630    /**
2631     * Makes the TextView at most this many lines tall.
2632     *
2633     * Setting this value overrides any other (maximum) height setting.
2634     *
2635     * @attr ref android.R.styleable#TextView_maxLines
2636     */
2637    @android.view.RemotableViewMethod
2638    public void setMaxLines(int maxlines) {
2639        mMaximum = maxlines;
2640        mMaxMode = LINES;
2641
2642        requestLayout();
2643        invalidate();
2644    }
2645
2646    /**
2647     * Makes the TextView at most this many pixels tall.  This option is mutually exclusive with the
2648     * {@link #setMaxLines(int)} method.
2649     *
2650     * Setting this value overrides any other (maximum) number of lines setting.
2651     *
2652     * @attr ref android.R.styleable#TextView_maxHeight
2653     */
2654    @android.view.RemotableViewMethod
2655    public void setMaxHeight(int maxHeight) {
2656        mMaximum = maxHeight;
2657        mMaxMode = PIXELS;
2658
2659        requestLayout();
2660        invalidate();
2661    }
2662
2663    /**
2664     * Makes the TextView exactly this many lines tall.
2665     *
2666     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2667     * height setting. A single line TextView will set this value to 1.
2668     *
2669     * @attr ref android.R.styleable#TextView_lines
2670     */
2671    @android.view.RemotableViewMethod
2672    public void setLines(int lines) {
2673        mMaximum = mMinimum = lines;
2674        mMaxMode = mMinMode = LINES;
2675
2676        requestLayout();
2677        invalidate();
2678    }
2679
2680    /**
2681     * Makes the TextView exactly this many pixels tall.
2682     * You could do the same thing by specifying this number in the
2683     * LayoutParams.
2684     *
2685     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2686     * height setting.
2687     *
2688     * @attr ref android.R.styleable#TextView_height
2689     */
2690    @android.view.RemotableViewMethod
2691    public void setHeight(int pixels) {
2692        mMaximum = mMinimum = pixels;
2693        mMaxMode = mMinMode = PIXELS;
2694
2695        requestLayout();
2696        invalidate();
2697    }
2698
2699    /**
2700     * Makes the TextView at least this many ems wide
2701     *
2702     * @attr ref android.R.styleable#TextView_minEms
2703     */
2704    @android.view.RemotableViewMethod
2705    public void setMinEms(int minems) {
2706        mMinWidth = minems;
2707        mMinWidthMode = EMS;
2708
2709        requestLayout();
2710        invalidate();
2711    }
2712
2713    /**
2714     * Makes the TextView at least this many pixels wide
2715     *
2716     * @attr ref android.R.styleable#TextView_minWidth
2717     */
2718    @android.view.RemotableViewMethod
2719    public void setMinWidth(int minpixels) {
2720        mMinWidth = minpixels;
2721        mMinWidthMode = PIXELS;
2722
2723        requestLayout();
2724        invalidate();
2725    }
2726
2727    /**
2728     * Makes the TextView at most this many ems wide
2729     *
2730     * @attr ref android.R.styleable#TextView_maxEms
2731     */
2732    @android.view.RemotableViewMethod
2733    public void setMaxEms(int maxems) {
2734        mMaxWidth = maxems;
2735        mMaxWidthMode = EMS;
2736
2737        requestLayout();
2738        invalidate();
2739    }
2740
2741    /**
2742     * Makes the TextView at most this many pixels wide
2743     *
2744     * @attr ref android.R.styleable#TextView_maxWidth
2745     */
2746    @android.view.RemotableViewMethod
2747    public void setMaxWidth(int maxpixels) {
2748        mMaxWidth = maxpixels;
2749        mMaxWidthMode = PIXELS;
2750
2751        requestLayout();
2752        invalidate();
2753    }
2754
2755    /**
2756     * Makes the TextView exactly this many ems wide
2757     *
2758     * @attr ref android.R.styleable#TextView_ems
2759     */
2760    @android.view.RemotableViewMethod
2761    public void setEms(int ems) {
2762        mMaxWidth = mMinWidth = ems;
2763        mMaxWidthMode = mMinWidthMode = EMS;
2764
2765        requestLayout();
2766        invalidate();
2767    }
2768
2769    /**
2770     * Makes the TextView exactly this many pixels wide.
2771     * You could do the same thing by specifying this number in the
2772     * LayoutParams.
2773     *
2774     * @attr ref android.R.styleable#TextView_width
2775     */
2776    @android.view.RemotableViewMethod
2777    public void setWidth(int pixels) {
2778        mMaxWidth = mMinWidth = pixels;
2779        mMaxWidthMode = mMinWidthMode = PIXELS;
2780
2781        requestLayout();
2782        invalidate();
2783    }
2784
2785
2786    /**
2787     * Sets line spacing for this TextView.  Each line will have its height
2788     * multiplied by <code>mult</code> and have <code>add</code> added to it.
2789     *
2790     * @attr ref android.R.styleable#TextView_lineSpacingExtra
2791     * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
2792     */
2793    public void setLineSpacing(float add, float mult) {
2794        if (mSpacingAdd != add || mSpacingMult != mult) {
2795            mSpacingAdd = add;
2796            mSpacingMult = mult;
2797
2798            if (mLayout != null) {
2799                nullLayouts();
2800                requestLayout();
2801                invalidate();
2802            }
2803        }
2804    }
2805
2806    /**
2807     * Convenience method: Append the specified text to the TextView's
2808     * display buffer, upgrading it to BufferType.EDITABLE if it was
2809     * not already editable.
2810     */
2811    public final void append(CharSequence text) {
2812        append(text, 0, text.length());
2813    }
2814
2815    /**
2816     * Convenience method: Append the specified text slice to the TextView's
2817     * display buffer, upgrading it to BufferType.EDITABLE if it was
2818     * not already editable.
2819     */
2820    public void append(CharSequence text, int start, int end) {
2821        if (!(mText instanceof Editable)) {
2822            setText(mText, BufferType.EDITABLE);
2823        }
2824
2825        ((Editable) mText).append(text, start, end);
2826    }
2827
2828    private void updateTextColors() {
2829        boolean inval = false;
2830        int color = mTextColor.getColorForState(getDrawableState(), 0);
2831        if (color != mCurTextColor) {
2832            mCurTextColor = color;
2833            inval = true;
2834        }
2835        if (mLinkTextColor != null) {
2836            color = mLinkTextColor.getColorForState(getDrawableState(), 0);
2837            if (color != mTextPaint.linkColor) {
2838                mTextPaint.linkColor = color;
2839                inval = true;
2840            }
2841        }
2842        if (mHintTextColor != null) {
2843            color = mHintTextColor.getColorForState(getDrawableState(), 0);
2844            if (color != mCurHintTextColor && mText.length() == 0) {
2845                mCurHintTextColor = color;
2846                inval = true;
2847            }
2848        }
2849        if (inval) {
2850            invalidate();
2851        }
2852    }
2853
2854    @Override
2855    protected void drawableStateChanged() {
2856        super.drawableStateChanged();
2857        if (mTextColor != null && mTextColor.isStateful()
2858                || (mHintTextColor != null && mHintTextColor.isStateful())
2859                || (mLinkTextColor != null && mLinkTextColor.isStateful())) {
2860            updateTextColors();
2861        }
2862
2863        final Drawables dr = mDrawables;
2864        if (dr != null) {
2865            int[] state = getDrawableState();
2866            if (dr.mDrawableTop != null && dr.mDrawableTop.isStateful()) {
2867                dr.mDrawableTop.setState(state);
2868            }
2869            if (dr.mDrawableBottom != null && dr.mDrawableBottom.isStateful()) {
2870                dr.mDrawableBottom.setState(state);
2871            }
2872            if (dr.mDrawableLeft != null && dr.mDrawableLeft.isStateful()) {
2873                dr.mDrawableLeft.setState(state);
2874            }
2875            if (dr.mDrawableRight != null && dr.mDrawableRight.isStateful()) {
2876                dr.mDrawableRight.setState(state);
2877            }
2878            if (dr.mDrawableStart != null && dr.mDrawableStart.isStateful()) {
2879                dr.mDrawableStart.setState(state);
2880            }
2881            if (dr.mDrawableEnd != null && dr.mDrawableEnd.isStateful()) {
2882                dr.mDrawableEnd.setState(state);
2883            }
2884        }
2885    }
2886
2887    /**
2888     * User interface state that is stored by TextView for implementing
2889     * {@link View#onSaveInstanceState}.
2890     */
2891    public static class SavedState extends BaseSavedState {
2892        int selStart;
2893        int selEnd;
2894        CharSequence text;
2895        boolean frozenWithFocus;
2896        CharSequence error;
2897
2898        SavedState(Parcelable superState) {
2899            super(superState);
2900        }
2901
2902        @Override
2903        public void writeToParcel(Parcel out, int flags) {
2904            super.writeToParcel(out, flags);
2905            out.writeInt(selStart);
2906            out.writeInt(selEnd);
2907            out.writeInt(frozenWithFocus ? 1 : 0);
2908            TextUtils.writeToParcel(text, out, flags);
2909
2910            if (error == null) {
2911                out.writeInt(0);
2912            } else {
2913                out.writeInt(1);
2914                TextUtils.writeToParcel(error, out, flags);
2915            }
2916        }
2917
2918        @Override
2919        public String toString() {
2920            String str = "TextView.SavedState{"
2921                    + Integer.toHexString(System.identityHashCode(this))
2922                    + " start=" + selStart + " end=" + selEnd;
2923            if (text != null) {
2924                str += " text=" + text;
2925            }
2926            return str + "}";
2927        }
2928
2929        @SuppressWarnings("hiding")
2930        public static final Parcelable.Creator<SavedState> CREATOR
2931                = new Parcelable.Creator<SavedState>() {
2932            public SavedState createFromParcel(Parcel in) {
2933                return new SavedState(in);
2934            }
2935
2936            public SavedState[] newArray(int size) {
2937                return new SavedState[size];
2938            }
2939        };
2940
2941        private SavedState(Parcel in) {
2942            super(in);
2943            selStart = in.readInt();
2944            selEnd = in.readInt();
2945            frozenWithFocus = (in.readInt() != 0);
2946            text = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2947
2948            if (in.readInt() != 0) {
2949                error = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2950            }
2951        }
2952    }
2953
2954    @Override
2955    public Parcelable onSaveInstanceState() {
2956        Parcelable superState = super.onSaveInstanceState();
2957
2958        // Save state if we are forced to
2959        boolean save = mFreezesText;
2960        int start = 0;
2961        int end = 0;
2962
2963        if (mText != null) {
2964            start = getSelectionStart();
2965            end = getSelectionEnd();
2966            if (start >= 0 || end >= 0) {
2967                // Or save state if there is a selection
2968                save = true;
2969            }
2970        }
2971
2972        if (save) {
2973            SavedState ss = new SavedState(superState);
2974            // XXX Should also save the current scroll position!
2975            ss.selStart = start;
2976            ss.selEnd = end;
2977
2978            if (mText instanceof Spanned) {
2979                /*
2980                 * Calling setText() strips off any ChangeWatchers;
2981                 * strip them now to avoid leaking references.
2982                 * But do it to a copy so that if there are any
2983                 * further changes to the text of this view, it
2984                 * won't get into an inconsistent state.
2985                 */
2986
2987                Spannable sp = new SpannableString(mText);
2988
2989                for (ChangeWatcher cw : sp.getSpans(0, sp.length(), ChangeWatcher.class)) {
2990                    sp.removeSpan(cw);
2991                }
2992
2993                removeMisspelledSpans(sp);
2994                sp.removeSpan(mSuggestionRangeSpan);
2995
2996                ss.text = sp;
2997            } else {
2998                ss.text = mText.toString();
2999            }
3000
3001            if (isFocused() && start >= 0 && end >= 0) {
3002                ss.frozenWithFocus = true;
3003            }
3004
3005            ss.error = mError;
3006
3007            return ss;
3008        }
3009
3010        return superState;
3011    }
3012
3013    void removeMisspelledSpans(Spannable spannable) {
3014        SuggestionSpan[] suggestionSpans = spannable.getSpans(0, spannable.length(),
3015                SuggestionSpan.class);
3016        for (int i = 0; i < suggestionSpans.length; i++) {
3017            int flags = suggestionSpans[i].getFlags();
3018            if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0
3019                    && (flags & SuggestionSpan.FLAG_MISSPELLED) != 0) {
3020                spannable.removeSpan(suggestionSpans[i]);
3021            }
3022        }
3023    }
3024
3025    @Override
3026    public void onRestoreInstanceState(Parcelable state) {
3027        if (!(state instanceof SavedState)) {
3028            super.onRestoreInstanceState(state);
3029            return;
3030        }
3031
3032        SavedState ss = (SavedState)state;
3033        super.onRestoreInstanceState(ss.getSuperState());
3034
3035        // XXX restore buffer type too, as well as lots of other stuff
3036        if (ss.text != null) {
3037            setText(ss.text);
3038        }
3039
3040        if (ss.selStart >= 0 && ss.selEnd >= 0) {
3041            if (mText instanceof Spannable) {
3042                int len = mText.length();
3043
3044                if (ss.selStart > len || ss.selEnd > len) {
3045                    String restored = "";
3046
3047                    if (ss.text != null) {
3048                        restored = "(restored) ";
3049                    }
3050
3051                    Log.e(LOG_TAG, "Saved cursor position " + ss.selStart +
3052                          "/" + ss.selEnd + " out of range for " + restored +
3053                          "text " + mText);
3054                } else {
3055                    Selection.setSelection((Spannable) mText, ss.selStart,
3056                                           ss.selEnd);
3057
3058                    if (ss.frozenWithFocus) {
3059                        mFrozenWithFocus = true;
3060                    }
3061                }
3062            }
3063        }
3064
3065        if (ss.error != null) {
3066            final CharSequence error = ss.error;
3067            // Display the error later, after the first layout pass
3068            post(new Runnable() {
3069                public void run() {
3070                    setError(error);
3071                }
3072            });
3073        }
3074    }
3075
3076    /**
3077     * Control whether this text view saves its entire text contents when
3078     * freezing to an icicle, in addition to dynamic state such as cursor
3079     * position.  By default this is false, not saving the text.  Set to true
3080     * if the text in the text view is not being saved somewhere else in
3081     * persistent storage (such as in a content provider) so that if the
3082     * view is later thawed the user will not lose their data.
3083     *
3084     * @param freezesText Controls whether a frozen icicle should include the
3085     * entire text data: true to include it, false to not.
3086     *
3087     * @attr ref android.R.styleable#TextView_freezesText
3088     */
3089    @android.view.RemotableViewMethod
3090    public void setFreezesText(boolean freezesText) {
3091        mFreezesText = freezesText;
3092    }
3093
3094    /**
3095     * Return whether this text view is including its entire text contents
3096     * in frozen icicles.
3097     *
3098     * @return Returns true if text is included, false if it isn't.
3099     *
3100     * @see #setFreezesText
3101     */
3102    public boolean getFreezesText() {
3103        return mFreezesText;
3104    }
3105
3106    ///////////////////////////////////////////////////////////////////////////
3107
3108    /**
3109     * Sets the Factory used to create new Editables.
3110     */
3111    public final void setEditableFactory(Editable.Factory factory) {
3112        mEditableFactory = factory;
3113        setText(mText);
3114    }
3115
3116    /**
3117     * Sets the Factory used to create new Spannables.
3118     */
3119    public final void setSpannableFactory(Spannable.Factory factory) {
3120        mSpannableFactory = factory;
3121        setText(mText);
3122    }
3123
3124    /**
3125     * Sets the string value of the TextView. TextView <em>does not</em> accept
3126     * HTML-like formatting, which you can do with text strings in XML resource files.
3127     * To style your strings, attach android.text.style.* objects to a
3128     * {@link android.text.SpannableString SpannableString}, or see the
3129     * <a href="{@docRoot}guide/topics/resources/available-resources.html#stringresources">
3130     * Available Resource Types</a> documentation for an example of setting
3131     * formatted text in the XML resource file.
3132     *
3133     * @attr ref android.R.styleable#TextView_text
3134     */
3135    @android.view.RemotableViewMethod
3136    public final void setText(CharSequence text) {
3137        setText(text, mBufferType);
3138    }
3139
3140    /**
3141     * Like {@link #setText(CharSequence)},
3142     * except that the cursor position (if any) is retained in the new text.
3143     *
3144     * @param text The new text to place in the text view.
3145     *
3146     * @see #setText(CharSequence)
3147     */
3148    @android.view.RemotableViewMethod
3149    public final void setTextKeepState(CharSequence text) {
3150        setTextKeepState(text, mBufferType);
3151    }
3152
3153    /**
3154     * Sets the text that this TextView is to display (see
3155     * {@link #setText(CharSequence)}) and also sets whether it is stored
3156     * in a styleable/spannable buffer and whether it is editable.
3157     *
3158     * @attr ref android.R.styleable#TextView_text
3159     * @attr ref android.R.styleable#TextView_bufferType
3160     */
3161    public void setText(CharSequence text, BufferType type) {
3162        setText(text, type, true, 0);
3163
3164        if (mCharWrapper != null) {
3165            mCharWrapper.mChars = null;
3166        }
3167    }
3168
3169    private void setText(CharSequence text, BufferType type,
3170                         boolean notifyBefore, int oldlen) {
3171        if (text == null) {
3172            text = "";
3173        }
3174
3175        // If suggestions are not enabled, remove the suggestion spans from the text
3176        if (!isSuggestionsEnabled()) {
3177            text = removeSuggestionSpans(text);
3178        }
3179
3180        if (!mUserSetTextScaleX) mTextPaint.setTextScaleX(1.0f);
3181
3182        if (text instanceof Spanned &&
3183            ((Spanned) text).getSpanStart(TextUtils.TruncateAt.MARQUEE) >= 0) {
3184            if (ViewConfiguration.get(mContext).isFadingMarqueeEnabled()) {
3185                setHorizontalFadingEdgeEnabled(true);
3186                mMarqueeFadeMode = MARQUEE_FADE_NORMAL;
3187            } else {
3188                setHorizontalFadingEdgeEnabled(false);
3189                mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
3190            }
3191            setEllipsize(TextUtils.TruncateAt.MARQUEE);
3192        }
3193
3194        int n = mFilters.length;
3195        for (int i = 0; i < n; i++) {
3196            CharSequence out = mFilters[i].filter(text, 0, text.length(),
3197                                                  EMPTY_SPANNED, 0, 0);
3198            if (out != null) {
3199                text = out;
3200            }
3201        }
3202
3203        if (notifyBefore) {
3204            if (mText != null) {
3205                oldlen = mText.length();
3206                sendBeforeTextChanged(mText, 0, oldlen, text.length());
3207            } else {
3208                sendBeforeTextChanged("", 0, 0, text.length());
3209            }
3210        }
3211
3212        boolean needEditableForNotification = false;
3213
3214        if (mListeners != null && mListeners.size() != 0) {
3215            needEditableForNotification = true;
3216        }
3217
3218        if (type == BufferType.EDITABLE || mInput != null || needEditableForNotification) {
3219            Editable t = mEditableFactory.newEditable(text);
3220            text = t;
3221            setFilters(t, mFilters);
3222            InputMethodManager imm = InputMethodManager.peekInstance();
3223            if (imm != null) imm.restartInput(this);
3224        } else if (type == BufferType.SPANNABLE || mMovement != null) {
3225            text = mSpannableFactory.newSpannable(text);
3226        } else if (!(text instanceof CharWrapper)) {
3227            text = TextUtils.stringOrSpannedString(text);
3228        }
3229
3230        if (mAutoLinkMask != 0) {
3231            Spannable s2;
3232
3233            if (type == BufferType.EDITABLE || text instanceof Spannable) {
3234                s2 = (Spannable) text;
3235            } else {
3236                s2 = mSpannableFactory.newSpannable(text);
3237            }
3238
3239            if (Linkify.addLinks(s2, mAutoLinkMask)) {
3240                text = s2;
3241                type = (type == BufferType.EDITABLE) ? BufferType.EDITABLE : BufferType.SPANNABLE;
3242
3243                /*
3244                 * We must go ahead and set the text before changing the
3245                 * movement method, because setMovementMethod() may call
3246                 * setText() again to try to upgrade the buffer type.
3247                 */
3248                mText = text;
3249
3250                // Do not change the movement method for text that support text selection as it
3251                // would prevent an arbitrary cursor displacement.
3252                if (mLinksClickable && !textCanBeSelected()) {
3253                    setMovementMethod(LinkMovementMethod.getInstance());
3254                }
3255            }
3256        }
3257
3258        mBufferType = type;
3259        mText = text;
3260
3261        if (mTransformation == null) {
3262            mTransformed = text;
3263        } else {
3264            mTransformed = mTransformation.getTransformation(text, this);
3265        }
3266
3267        final int textLength = text.length();
3268
3269        if (text instanceof Spannable && !mAllowTransformationLengthChange) {
3270            Spannable sp = (Spannable) text;
3271
3272            // Remove any ChangeWatchers that might have come
3273            // from other TextViews.
3274            final ChangeWatcher[] watchers = sp.getSpans(0, sp.length(), ChangeWatcher.class);
3275            final int count = watchers.length;
3276            for (int i = 0; i < count; i++)
3277                sp.removeSpan(watchers[i]);
3278
3279            if (mChangeWatcher == null)
3280                mChangeWatcher = new ChangeWatcher();
3281
3282            sp.setSpan(mChangeWatcher, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE |
3283                       (PRIORITY << Spanned.SPAN_PRIORITY_SHIFT));
3284
3285            if (mInput != null) {
3286                sp.setSpan(mInput, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
3287            }
3288
3289            if (mTransformation != null) {
3290                sp.setSpan(mTransformation, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
3291            }
3292
3293            if (mMovement != null) {
3294                mMovement.initialize(this, (Spannable) text);
3295
3296                /*
3297                 * Initializing the movement method will have set the
3298                 * selection, so reset mSelectionMoved to keep that from
3299                 * interfering with the normal on-focus selection-setting.
3300                 */
3301                mSelectionMoved = false;
3302            }
3303        }
3304
3305        if (mLayout != null) {
3306            checkForRelayout();
3307        }
3308
3309        sendOnTextChanged(text, 0, oldlen, textLength);
3310        onTextChanged(text, 0, oldlen, textLength);
3311
3312        if (needEditableForNotification) {
3313            sendAfterTextChanged((Editable) text);
3314        }
3315
3316        // SelectionModifierCursorController depends on textCanBeSelected, which depends on text
3317        prepareCursorControllers();
3318    }
3319
3320    /**
3321     * Sets the TextView to display the specified slice of the specified
3322     * char array.  You must promise that you will not change the contents
3323     * of the array except for right before another call to setText(),
3324     * since the TextView has no way to know that the text
3325     * has changed and that it needs to invalidate and re-layout.
3326     */
3327    public final void setText(char[] text, int start, int len) {
3328        int oldlen = 0;
3329
3330        if (start < 0 || len < 0 || start + len > text.length) {
3331            throw new IndexOutOfBoundsException(start + ", " + len);
3332        }
3333
3334        /*
3335         * We must do the before-notification here ourselves because if
3336         * the old text is a CharWrapper we destroy it before calling
3337         * into the normal path.
3338         */
3339        if (mText != null) {
3340            oldlen = mText.length();
3341            sendBeforeTextChanged(mText, 0, oldlen, len);
3342        } else {
3343            sendBeforeTextChanged("", 0, 0, len);
3344        }
3345
3346        if (mCharWrapper == null) {
3347            mCharWrapper = new CharWrapper(text, start, len);
3348        } else {
3349            mCharWrapper.set(text, start, len);
3350        }
3351
3352        setText(mCharWrapper, mBufferType, false, oldlen);
3353    }
3354
3355    private static class CharWrapper implements CharSequence, GetChars, GraphicsOperations {
3356        private char[] mChars;
3357        private int mStart, mLength;
3358
3359        public CharWrapper(char[] chars, int start, int len) {
3360            mChars = chars;
3361            mStart = start;
3362            mLength = len;
3363        }
3364
3365        /* package */ void set(char[] chars, int start, int len) {
3366            mChars = chars;
3367            mStart = start;
3368            mLength = len;
3369        }
3370
3371        public int length() {
3372            return mLength;
3373        }
3374
3375        public char charAt(int off) {
3376            return mChars[off + mStart];
3377        }
3378
3379        @Override
3380        public String toString() {
3381            return new String(mChars, mStart, mLength);
3382        }
3383
3384        public CharSequence subSequence(int start, int end) {
3385            if (start < 0 || end < 0 || start > mLength || end > mLength) {
3386                throw new IndexOutOfBoundsException(start + ", " + end);
3387            }
3388
3389            return new String(mChars, start + mStart, end - start);
3390        }
3391
3392        public void getChars(int start, int end, char[] buf, int off) {
3393            if (start < 0 || end < 0 || start > mLength || end > mLength) {
3394                throw new IndexOutOfBoundsException(start + ", " + end);
3395            }
3396
3397            System.arraycopy(mChars, start + mStart, buf, off, end - start);
3398        }
3399
3400        public void drawText(Canvas c, int start, int end,
3401                             float x, float y, Paint p) {
3402            c.drawText(mChars, start + mStart, end - start, x, y, p);
3403        }
3404
3405        public void drawTextRun(Canvas c, int start, int end,
3406                int contextStart, int contextEnd, float x, float y, int flags, Paint p) {
3407            int count = end - start;
3408            int contextCount = contextEnd - contextStart;
3409            c.drawTextRun(mChars, start + mStart, count, contextStart + mStart,
3410                    contextCount, x, y, flags, p);
3411        }
3412
3413        public float measureText(int start, int end, Paint p) {
3414            return p.measureText(mChars, start + mStart, end - start);
3415        }
3416
3417        public int getTextWidths(int start, int end, float[] widths, Paint p) {
3418            return p.getTextWidths(mChars, start + mStart, end - start, widths);
3419        }
3420
3421        public float getTextRunAdvances(int start, int end, int contextStart,
3422                int contextEnd, int flags, float[] advances, int advancesIndex,
3423                Paint p) {
3424            int count = end - start;
3425            int contextCount = contextEnd - contextStart;
3426            return p.getTextRunAdvances(mChars, start + mStart, count,
3427                    contextStart + mStart, contextCount, flags, advances,
3428                    advancesIndex);
3429        }
3430
3431        public float getTextRunAdvances(int start, int end, int contextStart,
3432                int contextEnd, int flags, float[] advances, int advancesIndex,
3433                Paint p, int reserved) {
3434            int count = end - start;
3435            int contextCount = contextEnd - contextStart;
3436            return p.getTextRunAdvances(mChars, start + mStart, count,
3437                    contextStart + mStart, contextCount, flags, advances,
3438                    advancesIndex, reserved);
3439        }
3440
3441        public int getTextRunCursor(int contextStart, int contextEnd, int flags,
3442                int offset, int cursorOpt, Paint p) {
3443            int contextCount = contextEnd - contextStart;
3444            return p.getTextRunCursor(mChars, contextStart + mStart,
3445                    contextCount, flags, offset + mStart, cursorOpt);
3446        }
3447    }
3448
3449    /**
3450     * Like {@link #setText(CharSequence, android.widget.TextView.BufferType)},
3451     * except that the cursor position (if any) is retained in the new text.
3452     *
3453     * @see #setText(CharSequence, android.widget.TextView.BufferType)
3454     */
3455    public final void setTextKeepState(CharSequence text, BufferType type) {
3456        int start = getSelectionStart();
3457        int end = getSelectionEnd();
3458        int len = text.length();
3459
3460        setText(text, type);
3461
3462        if (start >= 0 || end >= 0) {
3463            if (mText instanceof Spannable) {
3464                Selection.setSelection((Spannable) mText,
3465                                       Math.max(0, Math.min(start, len)),
3466                                       Math.max(0, Math.min(end, len)));
3467            }
3468        }
3469    }
3470
3471    @android.view.RemotableViewMethod
3472    public final void setText(int resid) {
3473        setText(getContext().getResources().getText(resid));
3474    }
3475
3476    public final void setText(int resid, BufferType type) {
3477        setText(getContext().getResources().getText(resid), type);
3478    }
3479
3480    /**
3481     * Sets the text to be displayed when the text of the TextView is empty.
3482     * Null means to use the normal empty text. The hint does not currently
3483     * participate in determining the size of the view.
3484     *
3485     * @attr ref android.R.styleable#TextView_hint
3486     */
3487    @android.view.RemotableViewMethod
3488    public final void setHint(CharSequence hint) {
3489        mHint = TextUtils.stringOrSpannedString(hint);
3490
3491        if (mLayout != null) {
3492            checkForRelayout();
3493        }
3494
3495        if (mText.length() == 0) {
3496            invalidate();
3497        }
3498    }
3499
3500    /**
3501     * Sets the text to be displayed when the text of the TextView is empty,
3502     * from a resource.
3503     *
3504     * @attr ref android.R.styleable#TextView_hint
3505     */
3506    @android.view.RemotableViewMethod
3507    public final void setHint(int resid) {
3508        setHint(getContext().getResources().getText(resid));
3509    }
3510
3511    /**
3512     * Returns the hint that is displayed when the text of the TextView
3513     * is empty.
3514     *
3515     * @attr ref android.R.styleable#TextView_hint
3516     */
3517    @ViewDebug.CapturedViewProperty
3518    public CharSequence getHint() {
3519        return mHint;
3520    }
3521
3522    private static boolean isMultilineInputType(int type) {
3523        return (type & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE)) ==
3524            (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE);
3525    }
3526
3527    /**
3528     * Set the type of the content with a constant as defined for {@link EditorInfo#inputType}. This
3529     * will take care of changing the key listener, by calling {@link #setKeyListener(KeyListener)},
3530     * to match the given content type.  If the given content type is {@link EditorInfo#TYPE_NULL}
3531     * then a soft keyboard will not be displayed for this text view.
3532     *
3533     * Note that the maximum number of displayed lines (see {@link #setMaxLines(int)}) will be
3534     * modified if you change the {@link EditorInfo#TYPE_TEXT_FLAG_MULTI_LINE} flag of the input
3535     * type.
3536     *
3537     * @see #getInputType()
3538     * @see #setRawInputType(int)
3539     * @see android.text.InputType
3540     * @attr ref android.R.styleable#TextView_inputType
3541     */
3542    public void setInputType(int type) {
3543        final boolean wasPassword = isPasswordInputType(mInputType);
3544        final boolean wasVisiblePassword = isVisiblePasswordInputType(mInputType);
3545        setInputType(type, false);
3546        final boolean isPassword = isPasswordInputType(type);
3547        final boolean isVisiblePassword = isVisiblePasswordInputType(type);
3548        boolean forceUpdate = false;
3549        if (isPassword) {
3550            setTransformationMethod(PasswordTransformationMethod.getInstance());
3551            setTypefaceByIndex(MONOSPACE, 0);
3552        } else if (isVisiblePassword) {
3553            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3554                forceUpdate = true;
3555            }
3556            setTypefaceByIndex(MONOSPACE, 0);
3557        } else if (wasPassword || wasVisiblePassword) {
3558            // not in password mode, clean up typeface and transformation
3559            setTypefaceByIndex(-1, -1);
3560            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3561                forceUpdate = true;
3562            }
3563        }
3564
3565        boolean singleLine = !isMultilineInputType(type);
3566
3567        // We need to update the single line mode if it has changed or we
3568        // were previously in password mode.
3569        if (mSingleLine != singleLine || forceUpdate) {
3570            // Change single line mode, but only change the transformation if
3571            // we are not in password mode.
3572            applySingleLine(singleLine, !isPassword, true);
3573        }
3574
3575        if (!isSuggestionsEnabled()) {
3576            mText = removeSuggestionSpans(mText);
3577        }
3578
3579        InputMethodManager imm = InputMethodManager.peekInstance();
3580        if (imm != null) imm.restartInput(this);
3581    }
3582
3583    /**
3584     * It would be better to rely on the input type for everything. A password inputType should have
3585     * a password transformation. We should hence use isPasswordInputType instead of this method.
3586     *
3587     * We should:
3588     * - Call setInputType in setKeyListener instead of changing the input type directly (which
3589     * would install the correct transformation).
3590     * - Refuse the installation of a non-password transformation in setTransformation if the input
3591     * type is password.
3592     *
3593     * However, this is like this for legacy reasons and we cannot break existing apps. This method
3594     * is useful since it matches what the user can see (obfuscated text or not).
3595     *
3596     * @return true if the current transformation method is of the password type.
3597     */
3598    private boolean hasPasswordTransformationMethod() {
3599        return mTransformation instanceof PasswordTransformationMethod;
3600    }
3601
3602    private static boolean isPasswordInputType(int inputType) {
3603        final int variation =
3604                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3605        return variation
3606                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)
3607                || variation
3608                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD)
3609                || variation
3610                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
3611    }
3612
3613    private static boolean isVisiblePasswordInputType(int inputType) {
3614        final int variation =
3615                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3616        return variation
3617                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
3618    }
3619
3620    /**
3621     * Directly change the content type integer of the text view, without
3622     * modifying any other state.
3623     * @see #setInputType(int)
3624     * @see android.text.InputType
3625     * @attr ref android.R.styleable#TextView_inputType
3626     */
3627    public void setRawInputType(int type) {
3628        mInputType = type;
3629    }
3630
3631    private void setInputType(int type, boolean direct) {
3632        final int cls = type & EditorInfo.TYPE_MASK_CLASS;
3633        KeyListener input;
3634        if (cls == EditorInfo.TYPE_CLASS_TEXT) {
3635            boolean autotext = (type & EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT) != 0;
3636            TextKeyListener.Capitalize cap;
3637            if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS) != 0) {
3638                cap = TextKeyListener.Capitalize.CHARACTERS;
3639            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS) != 0) {
3640                cap = TextKeyListener.Capitalize.WORDS;
3641            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES) != 0) {
3642                cap = TextKeyListener.Capitalize.SENTENCES;
3643            } else {
3644                cap = TextKeyListener.Capitalize.NONE;
3645            }
3646            input = TextKeyListener.getInstance(autotext, cap);
3647        } else if (cls == EditorInfo.TYPE_CLASS_NUMBER) {
3648            input = DigitsKeyListener.getInstance(
3649                    (type & EditorInfo.TYPE_NUMBER_FLAG_SIGNED) != 0,
3650                    (type & EditorInfo.TYPE_NUMBER_FLAG_DECIMAL) != 0);
3651        } else if (cls == EditorInfo.TYPE_CLASS_DATETIME) {
3652            switch (type & EditorInfo.TYPE_MASK_VARIATION) {
3653                case EditorInfo.TYPE_DATETIME_VARIATION_DATE:
3654                    input = DateKeyListener.getInstance();
3655                    break;
3656                case EditorInfo.TYPE_DATETIME_VARIATION_TIME:
3657                    input = TimeKeyListener.getInstance();
3658                    break;
3659                default:
3660                    input = DateTimeKeyListener.getInstance();
3661                    break;
3662            }
3663        } else if (cls == EditorInfo.TYPE_CLASS_PHONE) {
3664            input = DialerKeyListener.getInstance();
3665        } else {
3666            input = TextKeyListener.getInstance();
3667        }
3668        setRawInputType(type);
3669        if (direct) mInput = input;
3670        else {
3671            setKeyListenerOnly(input);
3672        }
3673    }
3674
3675    /**
3676     * Get the type of the content.
3677     *
3678     * @see #setInputType(int)
3679     * @see android.text.InputType
3680     */
3681    public int getInputType() {
3682        return mInputType;
3683    }
3684
3685    /**
3686     * Change the editor type integer associated with the text view, which
3687     * will be reported to an IME with {@link EditorInfo#imeOptions} when it
3688     * has focus.
3689     * @see #getImeOptions
3690     * @see android.view.inputmethod.EditorInfo
3691     * @attr ref android.R.styleable#TextView_imeOptions
3692     */
3693    public void setImeOptions(int imeOptions) {
3694        if (mInputContentType == null) {
3695            mInputContentType = new InputContentType();
3696        }
3697        mInputContentType.imeOptions = imeOptions;
3698    }
3699
3700    /**
3701     * Get the type of the IME editor.
3702     *
3703     * @see #setImeOptions(int)
3704     * @see android.view.inputmethod.EditorInfo
3705     */
3706    public int getImeOptions() {
3707        return mInputContentType != null
3708                ? mInputContentType.imeOptions : EditorInfo.IME_NULL;
3709    }
3710
3711    /**
3712     * Change the custom IME action associated with the text view, which
3713     * will be reported to an IME with {@link EditorInfo#actionLabel}
3714     * and {@link EditorInfo#actionId} when it has focus.
3715     * @see #getImeActionLabel
3716     * @see #getImeActionId
3717     * @see android.view.inputmethod.EditorInfo
3718     * @attr ref android.R.styleable#TextView_imeActionLabel
3719     * @attr ref android.R.styleable#TextView_imeActionId
3720     */
3721    public void setImeActionLabel(CharSequence label, int actionId) {
3722        if (mInputContentType == null) {
3723            mInputContentType = new InputContentType();
3724        }
3725        mInputContentType.imeActionLabel = label;
3726        mInputContentType.imeActionId = actionId;
3727    }
3728
3729    /**
3730     * Get the IME action label previous set with {@link #setImeActionLabel}.
3731     *
3732     * @see #setImeActionLabel
3733     * @see android.view.inputmethod.EditorInfo
3734     */
3735    public CharSequence getImeActionLabel() {
3736        return mInputContentType != null
3737                ? mInputContentType.imeActionLabel : null;
3738    }
3739
3740    /**
3741     * Get the IME action ID previous set with {@link #setImeActionLabel}.
3742     *
3743     * @see #setImeActionLabel
3744     * @see android.view.inputmethod.EditorInfo
3745     */
3746    public int getImeActionId() {
3747        return mInputContentType != null
3748                ? mInputContentType.imeActionId : 0;
3749    }
3750
3751    /**
3752     * Set a special listener to be called when an action is performed
3753     * on the text view.  This will be called when the enter key is pressed,
3754     * or when an action supplied to the IME is selected by the user.  Setting
3755     * this means that the normal hard key event will not insert a newline
3756     * into the text view, even if it is multi-line; holding down the ALT
3757     * modifier will, however, allow the user to insert a newline character.
3758     */
3759    public void setOnEditorActionListener(OnEditorActionListener l) {
3760        if (mInputContentType == null) {
3761            mInputContentType = new InputContentType();
3762        }
3763        mInputContentType.onEditorActionListener = l;
3764    }
3765
3766    /**
3767     * Called when an attached input method calls
3768     * {@link InputConnection#performEditorAction(int)
3769     * InputConnection.performEditorAction()}
3770     * for this text view.  The default implementation will call your action
3771     * listener supplied to {@link #setOnEditorActionListener}, or perform
3772     * a standard operation for {@link EditorInfo#IME_ACTION_NEXT
3773     * EditorInfo.IME_ACTION_NEXT}, {@link EditorInfo#IME_ACTION_PREVIOUS
3774     * EditorInfo.IME_ACTION_PREVIOUS}, or {@link EditorInfo#IME_ACTION_DONE
3775     * EditorInfo.IME_ACTION_DONE}.
3776     *
3777     * <p>For backwards compatibility, if no IME options have been set and the
3778     * text view would not normally advance focus on enter, then
3779     * the NEXT and DONE actions received here will be turned into an enter
3780     * key down/up pair to go through the normal key handling.
3781     *
3782     * @param actionCode The code of the action being performed.
3783     *
3784     * @see #setOnEditorActionListener
3785     */
3786    public void onEditorAction(int actionCode) {
3787        final InputContentType ict = mInputContentType;
3788        if (ict != null) {
3789            if (ict.onEditorActionListener != null) {
3790                if (ict.onEditorActionListener.onEditorAction(this,
3791                        actionCode, null)) {
3792                    return;
3793                }
3794            }
3795
3796            // This is the handling for some default action.
3797            // Note that for backwards compatibility we don't do this
3798            // default handling if explicit ime options have not been given,
3799            // instead turning this into the normal enter key codes that an
3800            // app may be expecting.
3801            if (actionCode == EditorInfo.IME_ACTION_NEXT) {
3802                View v = focusSearch(FOCUS_FORWARD);
3803                if (v != null) {
3804                    if (!v.requestFocus(FOCUS_FORWARD)) {
3805                        throw new IllegalStateException("focus search returned a view " +
3806                                "that wasn't able to take focus!");
3807                    }
3808                }
3809                return;
3810
3811            } else if (actionCode == EditorInfo.IME_ACTION_PREVIOUS) {
3812                View v = focusSearch(FOCUS_BACKWARD);
3813                if (v != null) {
3814                    if (!v.requestFocus(FOCUS_BACKWARD)) {
3815                        throw new IllegalStateException("focus search returned a view " +
3816                                "that wasn't able to take focus!");
3817                    }
3818                }
3819                return;
3820
3821            } else if (actionCode == EditorInfo.IME_ACTION_DONE) {
3822                InputMethodManager imm = InputMethodManager.peekInstance();
3823                if (imm != null && imm.isActive(this)) {
3824                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
3825                }
3826                return;
3827            }
3828        }
3829
3830        Handler h = getHandler();
3831        if (h != null) {
3832            long eventTime = SystemClock.uptimeMillis();
3833            h.sendMessage(h.obtainMessage(ViewRootImpl.DISPATCH_KEY_FROM_IME,
3834                    new KeyEvent(eventTime, eventTime,
3835                    KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_ENTER, 0, 0,
3836                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3837                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3838                    | KeyEvent.FLAG_EDITOR_ACTION)));
3839            h.sendMessage(h.obtainMessage(ViewRootImpl.DISPATCH_KEY_FROM_IME,
3840                    new KeyEvent(SystemClock.uptimeMillis(), eventTime,
3841                    KeyEvent.ACTION_UP, KeyEvent.KEYCODE_ENTER, 0, 0,
3842                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3843                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3844                    | KeyEvent.FLAG_EDITOR_ACTION)));
3845        }
3846    }
3847
3848    /**
3849     * Set the private content type of the text, which is the
3850     * {@link EditorInfo#privateImeOptions EditorInfo.privateImeOptions}
3851     * field that will be filled in when creating an input connection.
3852     *
3853     * @see #getPrivateImeOptions()
3854     * @see EditorInfo#privateImeOptions
3855     * @attr ref android.R.styleable#TextView_privateImeOptions
3856     */
3857    public void setPrivateImeOptions(String type) {
3858        if (mInputContentType == null) mInputContentType = new InputContentType();
3859        mInputContentType.privateImeOptions = type;
3860    }
3861
3862    /**
3863     * Get the private type of the content.
3864     *
3865     * @see #setPrivateImeOptions(String)
3866     * @see EditorInfo#privateImeOptions
3867     */
3868    public String getPrivateImeOptions() {
3869        return mInputContentType != null
3870                ? mInputContentType.privateImeOptions : null;
3871    }
3872
3873    /**
3874     * Set the extra input data of the text, which is the
3875     * {@link EditorInfo#extras TextBoxAttribute.extras}
3876     * Bundle that will be filled in when creating an input connection.  The
3877     * given integer is the resource ID of an XML resource holding an
3878     * {@link android.R.styleable#InputExtras &lt;input-extras&gt;} XML tree.
3879     *
3880     * @see #getInputExtras(boolean)
3881     * @see EditorInfo#extras
3882     * @attr ref android.R.styleable#TextView_editorExtras
3883     */
3884    public void setInputExtras(int xmlResId)
3885            throws XmlPullParserException, IOException {
3886        XmlResourceParser parser = getResources().getXml(xmlResId);
3887        if (mInputContentType == null) mInputContentType = new InputContentType();
3888        mInputContentType.extras = new Bundle();
3889        getResources().parseBundleExtras(parser, mInputContentType.extras);
3890    }
3891
3892    /**
3893     * Retrieve the input extras currently associated with the text view, which
3894     * can be viewed as well as modified.
3895     *
3896     * @param create If true, the extras will be created if they don't already
3897     * exist.  Otherwise, null will be returned if none have been created.
3898     * @see #setInputExtras(int)
3899     * @see EditorInfo#extras
3900     * @attr ref android.R.styleable#TextView_editorExtras
3901     */
3902    public Bundle getInputExtras(boolean create) {
3903        if (mInputContentType == null) {
3904            if (!create) return null;
3905            mInputContentType = new InputContentType();
3906        }
3907        if (mInputContentType.extras == null) {
3908            if (!create) return null;
3909            mInputContentType.extras = new Bundle();
3910        }
3911        return mInputContentType.extras;
3912    }
3913
3914    /**
3915     * Returns the error message that was set to be displayed with
3916     * {@link #setError}, or <code>null</code> if no error was set
3917     * or if it the error was cleared by the widget after user input.
3918     */
3919    public CharSequence getError() {
3920        return mError;
3921    }
3922
3923    /**
3924     * Sets the right-hand compound drawable of the TextView to the "error"
3925     * icon and sets an error message that will be displayed in a popup when
3926     * the TextView has focus.  The icon and error message will be reset to
3927     * null when any key events cause changes to the TextView's text.  If the
3928     * <code>error</code> is <code>null</code>, the error message and icon
3929     * will be cleared.
3930     */
3931    @android.view.RemotableViewMethod
3932    public void setError(CharSequence error) {
3933        if (error == null) {
3934            setError(null, null);
3935        } else {
3936            Drawable dr = getContext().getResources().
3937                getDrawable(com.android.internal.R.drawable.indicator_input_error);
3938
3939            dr.setBounds(0, 0, dr.getIntrinsicWidth(), dr.getIntrinsicHeight());
3940            setError(error, dr);
3941        }
3942    }
3943
3944    /**
3945     * Sets the right-hand compound drawable of the TextView to the specified
3946     * icon and sets an error message that will be displayed in a popup when
3947     * the TextView has focus.  The icon and error message will be reset to
3948     * null when any key events cause changes to the TextView's text.  The
3949     * drawable must already have had {@link Drawable#setBounds} set on it.
3950     * If the <code>error</code> is <code>null</code>, the error message will
3951     * be cleared (and you should provide a <code>null</code> icon as well).
3952     */
3953    public void setError(CharSequence error, Drawable icon) {
3954        error = TextUtils.stringOrSpannedString(error);
3955
3956        mError = error;
3957        mErrorWasChanged = true;
3958        final Drawables dr = mDrawables;
3959        if (dr != null) {
3960            switch (getResolvedLayoutDirection()) {
3961                default:
3962                case LAYOUT_DIRECTION_LTR:
3963                    setCompoundDrawables(dr.mDrawableLeft, dr.mDrawableTop, icon,
3964                            dr.mDrawableBottom);
3965                    break;
3966                case LAYOUT_DIRECTION_RTL:
3967                    setCompoundDrawables(icon, dr.mDrawableTop, dr.mDrawableRight,
3968                            dr.mDrawableBottom);
3969                    break;
3970            }
3971        } else {
3972            setCompoundDrawables(null, null, icon, null);
3973        }
3974
3975        if (error == null) {
3976            if (mPopup != null) {
3977                if (mPopup.isShowing()) {
3978                    mPopup.dismiss();
3979                }
3980
3981                mPopup = null;
3982            }
3983        } else {
3984            if (isFocused()) {
3985                showError();
3986            }
3987        }
3988    }
3989
3990    private void showError() {
3991        if (getWindowToken() == null) {
3992            mShowErrorAfterAttach = true;
3993            return;
3994        }
3995
3996        if (mPopup == null) {
3997            LayoutInflater inflater = LayoutInflater.from(getContext());
3998            final TextView err = (TextView) inflater.inflate(
3999                    com.android.internal.R.layout.textview_hint, null);
4000
4001            final float scale = getResources().getDisplayMetrics().density;
4002            mPopup = new ErrorPopup(err, (int) (200 * scale + 0.5f), (int) (50 * scale + 0.5f));
4003            mPopup.setFocusable(false);
4004            // The user is entering text, so the input method is needed.  We
4005            // don't want the popup to be displayed on top of it.
4006            mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);
4007        }
4008
4009        TextView tv = (TextView) mPopup.getContentView();
4010        chooseSize(mPopup, mError, tv);
4011        tv.setText(mError);
4012
4013        mPopup.showAsDropDown(this, getErrorX(), getErrorY());
4014        mPopup.fixDirection(mPopup.isAboveAnchor());
4015    }
4016
4017    private static class ErrorPopup extends PopupWindow {
4018        private boolean mAbove = false;
4019        private final TextView mView;
4020        private int mPopupInlineErrorBackgroundId = 0;
4021        private int mPopupInlineErrorAboveBackgroundId = 0;
4022
4023        ErrorPopup(TextView v, int width, int height) {
4024            super(v, width, height);
4025            mView = v;
4026            // Make sure the TextView has a background set as it will be used the first time it is
4027            // shown and positionned. Initialized with below background, which should have
4028            // dimensions identical to the above version for this to work (and is more likely).
4029            mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
4030                    com.android.internal.R.styleable.Theme_errorMessageBackground);
4031            mView.setBackgroundResource(mPopupInlineErrorBackgroundId);
4032        }
4033
4034        void fixDirection(boolean above) {
4035            mAbove = above;
4036
4037            if (above) {
4038                mPopupInlineErrorAboveBackgroundId =
4039                    getResourceId(mPopupInlineErrorAboveBackgroundId,
4040                            com.android.internal.R.styleable.Theme_errorMessageAboveBackground);
4041            } else {
4042                mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
4043                        com.android.internal.R.styleable.Theme_errorMessageBackground);
4044            }
4045
4046            mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId :
4047                mPopupInlineErrorBackgroundId);
4048        }
4049
4050        private int getResourceId(int currentId, int index) {
4051            if (currentId == 0) {
4052                TypedArray styledAttributes = mView.getContext().obtainStyledAttributes(
4053                        R.styleable.Theme);
4054                currentId = styledAttributes.getResourceId(index, 0);
4055                styledAttributes.recycle();
4056            }
4057            return currentId;
4058        }
4059
4060        @Override
4061        public void update(int x, int y, int w, int h, boolean force) {
4062            super.update(x, y, w, h, force);
4063
4064            boolean above = isAboveAnchor();
4065            if (above != mAbove) {
4066                fixDirection(above);
4067            }
4068        }
4069    }
4070
4071    /**
4072     * Returns the Y offset to make the pointy top of the error point
4073     * at the middle of the error icon.
4074     */
4075    private int getErrorX() {
4076        /*
4077         * The "25" is the distance between the point and the right edge
4078         * of the background
4079         */
4080        final float scale = getResources().getDisplayMetrics().density;
4081
4082        final Drawables dr = mDrawables;
4083        return getWidth() - mPopup.getWidth() - getPaddingRight() -
4084                (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f);
4085    }
4086
4087    /**
4088     * Returns the Y offset to make the pointy top of the error point
4089     * at the bottom of the error icon.
4090     */
4091    private int getErrorY() {
4092        /*
4093         * Compound, not extended, because the icon is not clipped
4094         * if the text height is smaller.
4095         */
4096        final int compoundPaddingTop = getCompoundPaddingTop();
4097        int vspace = mBottom - mTop - getCompoundPaddingBottom() - compoundPaddingTop;
4098
4099        final Drawables dr = mDrawables;
4100        int icontop = compoundPaddingTop +
4101                (vspace - (dr != null ? dr.mDrawableHeightRight : 0)) / 2;
4102
4103        /*
4104         * The "2" is the distance between the point and the top edge
4105         * of the background.
4106         */
4107        final float scale = getResources().getDisplayMetrics().density;
4108        return icontop + (dr != null ? dr.mDrawableHeightRight : 0) - getHeight() -
4109                (int) (2 * scale + 0.5f);
4110    }
4111
4112    private void hideError() {
4113        if (mPopup != null) {
4114            if (mPopup.isShowing()) {
4115                mPopup.dismiss();
4116            }
4117        }
4118
4119        mShowErrorAfterAttach = false;
4120    }
4121
4122    private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) {
4123        int wid = tv.getPaddingLeft() + tv.getPaddingRight();
4124        int ht = tv.getPaddingTop() + tv.getPaddingBottom();
4125
4126        int defaultWidthInPixels = getResources().getDimensionPixelSize(
4127                com.android.internal.R.dimen.textview_error_popup_default_width);
4128        Layout l = new StaticLayout(text, tv.getPaint(), defaultWidthInPixels,
4129                                    Layout.Alignment.ALIGN_NORMAL, 1, 0, true);
4130        float max = 0;
4131        for (int i = 0; i < l.getLineCount(); i++) {
4132            max = Math.max(max, l.getLineWidth(i));
4133        }
4134
4135        /*
4136         * Now set the popup size to be big enough for the text plus the border capped
4137         * to DEFAULT_MAX_POPUP_WIDTH
4138         */
4139        pop.setWidth(wid + (int) Math.ceil(max));
4140        pop.setHeight(ht + l.getHeight());
4141    }
4142
4143
4144    @Override
4145    protected boolean setFrame(int l, int t, int r, int b) {
4146        boolean result = super.setFrame(l, t, r, b);
4147
4148        if (mPopup != null) {
4149            TextView tv = (TextView) mPopup.getContentView();
4150            chooseSize(mPopup, mError, tv);
4151            mPopup.update(this, getErrorX(), getErrorY(),
4152                          mPopup.getWidth(), mPopup.getHeight());
4153        }
4154
4155        restartMarqueeIfNeeded();
4156
4157        return result;
4158    }
4159
4160    private void restartMarqueeIfNeeded() {
4161        if (mRestartMarquee && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
4162            mRestartMarquee = false;
4163            startMarquee();
4164        }
4165    }
4166
4167    /**
4168     * Sets the list of input filters that will be used if the buffer is
4169     * Editable.  Has no effect otherwise.
4170     *
4171     * @attr ref android.R.styleable#TextView_maxLength
4172     */
4173    public void setFilters(InputFilter[] filters) {
4174        if (filters == null) {
4175            throw new IllegalArgumentException();
4176        }
4177
4178        mFilters = filters;
4179
4180        if (mText instanceof Editable) {
4181            setFilters((Editable) mText, filters);
4182        }
4183    }
4184
4185    /**
4186     * Sets the list of input filters on the specified Editable,
4187     * and includes mInput in the list if it is an InputFilter.
4188     */
4189    private void setFilters(Editable e, InputFilter[] filters) {
4190        if (mInput instanceof InputFilter) {
4191            InputFilter[] nf = new InputFilter[filters.length + 1];
4192
4193            System.arraycopy(filters, 0, nf, 0, filters.length);
4194            nf[filters.length] = (InputFilter) mInput;
4195
4196            e.setFilters(nf);
4197        } else {
4198            e.setFilters(filters);
4199        }
4200    }
4201
4202    /**
4203     * Returns the current list of input filters.
4204     */
4205    public InputFilter[] getFilters() {
4206        return mFilters;
4207    }
4208
4209    /////////////////////////////////////////////////////////////////////////
4210
4211    private int getVerticalOffset(boolean forceNormal) {
4212        int voffset = 0;
4213        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
4214
4215        Layout l = mLayout;
4216        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
4217            l = mHintLayout;
4218        }
4219
4220        if (gravity != Gravity.TOP) {
4221            int boxht;
4222
4223            if (l == mHintLayout) {
4224                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
4225                        getCompoundPaddingBottom();
4226            } else {
4227                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
4228                        getExtendedPaddingBottom();
4229            }
4230            int textht = l.getHeight();
4231
4232            if (textht < boxht) {
4233                if (gravity == Gravity.BOTTOM)
4234                    voffset = boxht - textht;
4235                else // (gravity == Gravity.CENTER_VERTICAL)
4236                    voffset = (boxht - textht) >> 1;
4237            }
4238        }
4239        return voffset;
4240    }
4241
4242    private int getBottomVerticalOffset(boolean forceNormal) {
4243        int voffset = 0;
4244        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
4245
4246        Layout l = mLayout;
4247        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
4248            l = mHintLayout;
4249        }
4250
4251        if (gravity != Gravity.BOTTOM) {
4252            int boxht;
4253
4254            if (l == mHintLayout) {
4255                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
4256                        getCompoundPaddingBottom();
4257            } else {
4258                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
4259                        getExtendedPaddingBottom();
4260            }
4261            int textht = l.getHeight();
4262
4263            if (textht < boxht) {
4264                if (gravity == Gravity.TOP)
4265                    voffset = boxht - textht;
4266                else // (gravity == Gravity.CENTER_VERTICAL)
4267                    voffset = (boxht - textht) >> 1;
4268            }
4269        }
4270        return voffset;
4271    }
4272
4273    private void invalidateCursorPath() {
4274        if (mHighlightPathBogus) {
4275            invalidateCursor();
4276        } else {
4277            final int horizontalPadding = getCompoundPaddingLeft();
4278            final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
4279
4280            if (mCursorCount == 0) {
4281                synchronized (sTempRect) {
4282                    /*
4283                     * The reason for this concern about the thickness of the
4284                     * cursor and doing the floor/ceil on the coordinates is that
4285                     * some EditTexts (notably textfields in the Browser) have
4286                     * anti-aliased text where not all the characters are
4287                     * necessarily at integer-multiple locations.  This should
4288                     * make sure the entire cursor gets invalidated instead of
4289                     * sometimes missing half a pixel.
4290                     */
4291                    float thick = FloatMath.ceil(mTextPaint.getStrokeWidth());
4292                    if (thick < 1.0f) {
4293                        thick = 1.0f;
4294                    }
4295
4296                    thick /= 2.0f;
4297
4298                    mHighlightPath.computeBounds(sTempRect, false);
4299
4300                    invalidate((int) FloatMath.floor(horizontalPadding + sTempRect.left - thick),
4301                            (int) FloatMath.floor(verticalPadding + sTempRect.top - thick),
4302                            (int) FloatMath.ceil(horizontalPadding + sTempRect.right + thick),
4303                            (int) FloatMath.ceil(verticalPadding + sTempRect.bottom + thick));
4304                }
4305            } else {
4306                for (int i = 0; i < mCursorCount; i++) {
4307                    Rect bounds = mCursorDrawable[i].getBounds();
4308                    invalidate(bounds.left + horizontalPadding, bounds.top + verticalPadding,
4309                            bounds.right + horizontalPadding, bounds.bottom + verticalPadding);
4310                }
4311            }
4312        }
4313    }
4314
4315    private void invalidateCursor() {
4316        int where = getSelectionEnd();
4317
4318        invalidateCursor(where, where, where);
4319    }
4320
4321    private void invalidateCursor(int a, int b, int c) {
4322        if (a >= 0 || b >= 0 || c >= 0) {
4323            int start = Math.min(Math.min(a, b), c);
4324            int end = Math.max(Math.max(a, b), c);
4325            invalidateRegion(start, end);
4326        }
4327    }
4328
4329    /**
4330     * Invalidates the region of text enclosed between the start and end text offsets.
4331     *
4332     * @hide
4333     */
4334    void invalidateRegion(int start, int end) {
4335        if (mLayout == null) {
4336            invalidate();
4337        } else {
4338                int lineStart = mLayout.getLineForOffset(start);
4339                int top = mLayout.getLineTop(lineStart);
4340
4341                // This is ridiculous, but the descent from the line above
4342                // can hang down into the line we really want to redraw,
4343                // so we have to invalidate part of the line above to make
4344                // sure everything that needs to be redrawn really is.
4345                // (But not the whole line above, because that would cause
4346                // the same problem with the descenders on the line above it!)
4347                if (lineStart > 0) {
4348                    top -= mLayout.getLineDescent(lineStart - 1);
4349                }
4350
4351                int lineEnd;
4352
4353                if (start == end)
4354                    lineEnd = lineStart;
4355                else
4356                    lineEnd = mLayout.getLineForOffset(end);
4357
4358                int bottom = mLayout.getLineBottom(lineEnd);
4359
4360                final int compoundPaddingLeft = getCompoundPaddingLeft();
4361                final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
4362
4363                int left, right;
4364                if (lineStart == lineEnd) {
4365                    left = (int) mLayout.getPrimaryHorizontal(start);
4366                    right = (int) (mLayout.getPrimaryHorizontal(end) + 1.0);
4367                    left += compoundPaddingLeft;
4368                    right += compoundPaddingLeft;
4369                } else {
4370                    // Rectangle bounding box when the region spans several lines
4371                    left = compoundPaddingLeft;
4372                    right = getWidth() - getCompoundPaddingRight();
4373                }
4374
4375                invalidate(mScrollX + left, verticalPadding + top,
4376                        mScrollX + right, verticalPadding + bottom);
4377        }
4378    }
4379
4380    private void registerForPreDraw() {
4381        final ViewTreeObserver observer = getViewTreeObserver();
4382
4383        if (mPreDrawState == PREDRAW_NOT_REGISTERED) {
4384            observer.addOnPreDrawListener(this);
4385            mPreDrawState = PREDRAW_PENDING;
4386        } else if (mPreDrawState == PREDRAW_DONE) {
4387            mPreDrawState = PREDRAW_PENDING;
4388        }
4389
4390        // else state is PREDRAW_PENDING, so keep waiting.
4391    }
4392
4393    /**
4394     * {@inheritDoc}
4395     */
4396    public boolean onPreDraw() {
4397        if (mPreDrawState != PREDRAW_PENDING) {
4398            return true;
4399        }
4400
4401        if (mLayout == null) {
4402            assumeLayout();
4403        }
4404
4405        boolean changed = false;
4406
4407        if (mMovement != null) {
4408            /* This code also provides auto-scrolling when a cursor is moved using a
4409             * CursorController (insertion point or selection limits).
4410             * For selection, ensure start or end is visible depending on controller's state.
4411             */
4412            int curs = getSelectionEnd();
4413            // Do not create the controller if it is not already created.
4414            if (mSelectionModifierCursorController != null &&
4415                    mSelectionModifierCursorController.isSelectionStartDragged()) {
4416                curs = getSelectionStart();
4417            }
4418
4419            /*
4420             * TODO: This should really only keep the end in view if
4421             * it already was before the text changed.  I'm not sure
4422             * of a good way to tell from here if it was.
4423             */
4424            if (curs < 0 &&
4425                  (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
4426                curs = mText.length();
4427            }
4428
4429            if (curs >= 0) {
4430                changed = bringPointIntoView(curs);
4431            }
4432        } else {
4433            changed = bringTextIntoView();
4434        }
4435
4436        // This has to be checked here since:
4437        // - onFocusChanged cannot start it when focus is given to a view with selected text (after
4438        //   a screen rotation) since layout is not yet initialized at that point.
4439        if (mCreatedWithASelection) {
4440            startSelectionActionMode();
4441            mCreatedWithASelection = false;
4442        }
4443
4444        // Phone specific code (there is no ExtractEditText on tablets).
4445        // ExtractEditText does not call onFocus when it is displayed, and mHasSelectionOnFocus can
4446        // not be set. Do the test here instead.
4447        if (this instanceof ExtractEditText && hasSelection()) {
4448            startSelectionActionMode();
4449        }
4450
4451        mPreDrawState = PREDRAW_DONE;
4452        return !changed;
4453    }
4454
4455    @Override
4456    protected void onAttachedToWindow() {
4457        super.onAttachedToWindow();
4458
4459        mTemporaryDetach = false;
4460
4461        if (mShowErrorAfterAttach) {
4462            showError();
4463            mShowErrorAfterAttach = false;
4464        }
4465
4466        final ViewTreeObserver observer = getViewTreeObserver();
4467        // No need to create the controller.
4468        // The get method will add the listener on controller creation.
4469        if (mInsertionPointCursorController != null) {
4470            observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
4471        }
4472        if (mSelectionModifierCursorController != null) {
4473            observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
4474        }
4475
4476        // Resolve drawables as the layout direction has been resolved
4477        resolveDrawables();
4478
4479        updateSpellCheckSpans(0, mText.length(), true /* create the spell checker if needed */);
4480    }
4481
4482    @Override
4483    protected void onDetachedFromWindow() {
4484        super.onDetachedFromWindow();
4485
4486        final ViewTreeObserver observer = getViewTreeObserver();
4487        if (mPreDrawState != PREDRAW_NOT_REGISTERED) {
4488            observer.removeOnPreDrawListener(this);
4489            mPreDrawState = PREDRAW_NOT_REGISTERED;
4490        }
4491
4492        if (mError != null) {
4493            hideError();
4494        }
4495
4496        if (mBlink != null) {
4497            mBlink.removeCallbacks(mBlink);
4498        }
4499
4500        if (mInsertionPointCursorController != null) {
4501            mInsertionPointCursorController.onDetached();
4502        }
4503
4504        if (mSelectionModifierCursorController != null) {
4505            mSelectionModifierCursorController.onDetached();
4506        }
4507
4508        hideControllers();
4509
4510        resetResolvedDrawables();
4511
4512        if (mSpellChecker != null) {
4513            mSpellChecker.closeSession();
4514            // Forces the creation of a new SpellChecker next time this window is created.
4515            // Will handle the cases where the settings has been changed in the meantime.
4516            mSpellChecker = null;
4517        }
4518    }
4519
4520    @Override
4521    protected boolean isPaddingOffsetRequired() {
4522        return mShadowRadius != 0 || mDrawables != null;
4523    }
4524
4525    @Override
4526    protected int getLeftPaddingOffset() {
4527        return getCompoundPaddingLeft() - mPaddingLeft +
4528                (int) Math.min(0, mShadowDx - mShadowRadius);
4529    }
4530
4531    @Override
4532    protected int getTopPaddingOffset() {
4533        return (int) Math.min(0, mShadowDy - mShadowRadius);
4534    }
4535
4536    @Override
4537    protected int getBottomPaddingOffset() {
4538        return (int) Math.max(0, mShadowDy + mShadowRadius);
4539    }
4540
4541    @Override
4542    protected int getRightPaddingOffset() {
4543        return -(getCompoundPaddingRight() - mPaddingRight) +
4544                (int) Math.max(0, mShadowDx + mShadowRadius);
4545    }
4546
4547    @Override
4548    protected boolean verifyDrawable(Drawable who) {
4549        final boolean verified = super.verifyDrawable(who);
4550        if (!verified && mDrawables != null) {
4551            return who == mDrawables.mDrawableLeft || who == mDrawables.mDrawableTop ||
4552                    who == mDrawables.mDrawableRight || who == mDrawables.mDrawableBottom ||
4553                    who == mDrawables.mDrawableStart || who == mDrawables.mDrawableEnd;
4554        }
4555        return verified;
4556    }
4557
4558    @Override
4559    public void jumpDrawablesToCurrentState() {
4560        super.jumpDrawablesToCurrentState();
4561        if (mDrawables != null) {
4562            if (mDrawables.mDrawableLeft != null) {
4563                mDrawables.mDrawableLeft.jumpToCurrentState();
4564            }
4565            if (mDrawables.mDrawableTop != null) {
4566                mDrawables.mDrawableTop.jumpToCurrentState();
4567            }
4568            if (mDrawables.mDrawableRight != null) {
4569                mDrawables.mDrawableRight.jumpToCurrentState();
4570            }
4571            if (mDrawables.mDrawableBottom != null) {
4572                mDrawables.mDrawableBottom.jumpToCurrentState();
4573            }
4574            if (mDrawables.mDrawableStart != null) {
4575                mDrawables.mDrawableStart.jumpToCurrentState();
4576            }
4577            if (mDrawables.mDrawableEnd != null) {
4578                mDrawables.mDrawableEnd.jumpToCurrentState();
4579            }
4580        }
4581    }
4582
4583    @Override
4584    public void invalidateDrawable(Drawable drawable) {
4585        if (verifyDrawable(drawable)) {
4586            final Rect dirty = drawable.getBounds();
4587            int scrollX = mScrollX;
4588            int scrollY = mScrollY;
4589
4590            // IMPORTANT: The coordinates below are based on the coordinates computed
4591            // for each compound drawable in onDraw(). Make sure to update each section
4592            // accordingly.
4593            final TextView.Drawables drawables = mDrawables;
4594            if (drawables != null) {
4595                if (drawable == drawables.mDrawableLeft) {
4596                    final int compoundPaddingTop = getCompoundPaddingTop();
4597                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4598                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4599
4600                    scrollX += mPaddingLeft;
4601                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightLeft) / 2;
4602                } else if (drawable == drawables.mDrawableRight) {
4603                    final int compoundPaddingTop = getCompoundPaddingTop();
4604                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4605                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4606
4607                    scrollX += (mRight - mLeft - mPaddingRight - drawables.mDrawableSizeRight);
4608                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightRight) / 2;
4609                } else if (drawable == drawables.mDrawableTop) {
4610                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4611                    final int compoundPaddingRight = getCompoundPaddingRight();
4612                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4613
4614                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthTop) / 2;
4615                    scrollY += mPaddingTop;
4616                } else if (drawable == drawables.mDrawableBottom) {
4617                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4618                    final int compoundPaddingRight = getCompoundPaddingRight();
4619                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4620
4621                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthBottom) / 2;
4622                    scrollY += (mBottom - mTop - mPaddingBottom - drawables.mDrawableSizeBottom);
4623                }
4624            }
4625
4626            invalidate(dirty.left + scrollX, dirty.top + scrollY,
4627                    dirty.right + scrollX, dirty.bottom + scrollY);
4628        }
4629    }
4630
4631    /**
4632     * @hide
4633     */
4634    @Override
4635    public int getResolvedLayoutDirection(Drawable who) {
4636        if (who == null) return View.LAYOUT_DIRECTION_LTR;
4637        if (mDrawables != null) {
4638            final Drawables drawables = mDrawables;
4639            if (who == drawables.mDrawableLeft || who == drawables.mDrawableRight ||
4640                who == drawables.mDrawableTop || who == drawables.mDrawableBottom ||
4641                who == drawables.mDrawableStart || who == drawables.mDrawableEnd) {
4642                return getResolvedLayoutDirection();
4643            }
4644        }
4645        return super.getResolvedLayoutDirection(who);
4646    }
4647
4648    @Override
4649    protected boolean onSetAlpha(int alpha) {
4650        // Alpha is supported if and only if the drawing can be done in one pass.
4651        // TODO text with spans with a background color currently do not respect this alpha.
4652        if (getBackground() == null) {
4653            mCurrentAlpha = alpha;
4654            final Drawables dr = mDrawables;
4655            if (dr != null) {
4656                if (dr.mDrawableLeft != null) dr.mDrawableLeft.mutate().setAlpha(alpha);
4657                if (dr.mDrawableTop != null) dr.mDrawableTop.mutate().setAlpha(alpha);
4658                if (dr.mDrawableRight != null) dr.mDrawableRight.mutate().setAlpha(alpha);
4659                if (dr.mDrawableBottom != null) dr.mDrawableBottom.mutate().setAlpha(alpha);
4660                if (dr.mDrawableStart != null) dr.mDrawableStart.mutate().setAlpha(alpha);
4661                if (dr.mDrawableEnd != null) dr.mDrawableEnd.mutate().setAlpha(alpha);
4662            }
4663            return true;
4664        }
4665
4666        mCurrentAlpha = 255;
4667        return false;
4668    }
4669
4670    /**
4671     * When a TextView is used to display a useful piece of information to the user (such as a
4672     * contact's address), it should be made selectable, so that the user can select and copy this
4673     * content.
4674     *
4675     * Use {@link #setTextIsSelectable(boolean)} or the
4676     * {@link android.R.styleable#TextView_textIsSelectable} XML attribute to make this TextView
4677     * selectable (text is not selectable by default).
4678     *
4679     * Note that this method simply returns the state of this flag. Although this flag has to be set
4680     * in order to select text in non-editable TextView, the content of an {@link EditText} can
4681     * always be selected, independently of the value of this flag.
4682     *
4683     * @return True if the text displayed in this TextView can be selected by the user.
4684     *
4685     * @attr ref android.R.styleable#TextView_textIsSelectable
4686     */
4687    public boolean isTextSelectable() {
4688        return mTextIsSelectable;
4689    }
4690
4691    /**
4692     * Sets whether or not (default) the content of this view is selectable by the user.
4693     *
4694     * Note that this methods affect the {@link #setFocusable(boolean)},
4695     * {@link #setFocusableInTouchMode(boolean)} {@link #setClickable(boolean)} and
4696     * {@link #setLongClickable(boolean)} states and you may want to restore these if they were
4697     * customized.
4698     *
4699     * See {@link #isTextSelectable} for details.
4700     *
4701     * @param selectable Whether or not the content of this TextView should be selectable.
4702     */
4703    public void setTextIsSelectable(boolean selectable) {
4704        if (mTextIsSelectable == selectable) return;
4705
4706        mTextIsSelectable = selectable;
4707
4708        setFocusableInTouchMode(selectable);
4709        setFocusable(selectable);
4710        setClickable(selectable);
4711        setLongClickable(selectable);
4712
4713        // mInputType is already EditorInfo.TYPE_NULL and mInput is null;
4714
4715        setMovementMethod(selectable ? ArrowKeyMovementMethod.getInstance() : null);
4716        setText(getText(), selectable ? BufferType.SPANNABLE : BufferType.NORMAL);
4717
4718        // Called by setText above, but safer in case of future code changes
4719        prepareCursorControllers();
4720    }
4721
4722    @Override
4723    protected int[] onCreateDrawableState(int extraSpace) {
4724        final int[] drawableState;
4725
4726        if (mSingleLine) {
4727            drawableState = super.onCreateDrawableState(extraSpace);
4728        } else {
4729            drawableState = super.onCreateDrawableState(extraSpace + 1);
4730            mergeDrawableStates(drawableState, MULTILINE_STATE_SET);
4731        }
4732
4733        if (mTextIsSelectable) {
4734            // Disable pressed state, which was introduced when TextView was made clickable.
4735            // Prevents text color change.
4736            // setClickable(false) would have a similar effect, but it also disables focus changes
4737            // and long press actions, which are both needed by text selection.
4738            final int length = drawableState.length;
4739            for (int i = 0; i < length; i++) {
4740                if (drawableState[i] == R.attr.state_pressed) {
4741                    final int[] nonPressedState = new int[length - 1];
4742                    System.arraycopy(drawableState, 0, nonPressedState, 0, i);
4743                    System.arraycopy(drawableState, i + 1, nonPressedState, i, length - i - 1);
4744                    return nonPressedState;
4745                }
4746            }
4747        }
4748
4749        return drawableState;
4750    }
4751
4752    @Override
4753    protected void onDraw(Canvas canvas) {
4754        if (mPreDrawState == PREDRAW_DONE) {
4755            final ViewTreeObserver observer = getViewTreeObserver();
4756            observer.removeOnPreDrawListener(this);
4757            mPreDrawState = PREDRAW_NOT_REGISTERED;
4758        }
4759
4760        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return;
4761
4762        restartMarqueeIfNeeded();
4763
4764        // Draw the background for this view
4765        super.onDraw(canvas);
4766
4767        final int compoundPaddingLeft = getCompoundPaddingLeft();
4768        final int compoundPaddingTop = getCompoundPaddingTop();
4769        final int compoundPaddingRight = getCompoundPaddingRight();
4770        final int compoundPaddingBottom = getCompoundPaddingBottom();
4771        final int scrollX = mScrollX;
4772        final int scrollY = mScrollY;
4773        final int right = mRight;
4774        final int left = mLeft;
4775        final int bottom = mBottom;
4776        final int top = mTop;
4777
4778        final Drawables dr = mDrawables;
4779        if (dr != null) {
4780            /*
4781             * Compound, not extended, because the icon is not clipped
4782             * if the text height is smaller.
4783             */
4784
4785            int vspace = bottom - top - compoundPaddingBottom - compoundPaddingTop;
4786            int hspace = right - left - compoundPaddingRight - compoundPaddingLeft;
4787
4788            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4789            // Make sure to update invalidateDrawable() when changing this code.
4790            if (dr.mDrawableLeft != null) {
4791                canvas.save();
4792                canvas.translate(scrollX + mPaddingLeft,
4793                                 scrollY + compoundPaddingTop +
4794                                 (vspace - dr.mDrawableHeightLeft) / 2);
4795                dr.mDrawableLeft.draw(canvas);
4796                canvas.restore();
4797            }
4798
4799            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4800            // Make sure to update invalidateDrawable() when changing this code.
4801            if (dr.mDrawableRight != null) {
4802                canvas.save();
4803                canvas.translate(scrollX + right - left - mPaddingRight - dr.mDrawableSizeRight,
4804                         scrollY + compoundPaddingTop + (vspace - dr.mDrawableHeightRight) / 2);
4805                dr.mDrawableRight.draw(canvas);
4806                canvas.restore();
4807            }
4808
4809            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4810            // Make sure to update invalidateDrawable() when changing this code.
4811            if (dr.mDrawableTop != null) {
4812                canvas.save();
4813                canvas.translate(scrollX + compoundPaddingLeft + (hspace - dr.mDrawableWidthTop) / 2,
4814                        scrollY + mPaddingTop);
4815                dr.mDrawableTop.draw(canvas);
4816                canvas.restore();
4817            }
4818
4819            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4820            // Make sure to update invalidateDrawable() when changing this code.
4821            if (dr.mDrawableBottom != null) {
4822                canvas.save();
4823                canvas.translate(scrollX + compoundPaddingLeft +
4824                        (hspace - dr.mDrawableWidthBottom) / 2,
4825                         scrollY + bottom - top - mPaddingBottom - dr.mDrawableSizeBottom);
4826                dr.mDrawableBottom.draw(canvas);
4827                canvas.restore();
4828            }
4829        }
4830
4831        int color = mCurTextColor;
4832
4833        if (mLayout == null) {
4834            assumeLayout();
4835        }
4836
4837        Layout layout = mLayout;
4838        int cursorcolor = color;
4839
4840        if (mHint != null && mText.length() == 0) {
4841            if (mHintTextColor != null) {
4842                color = mCurHintTextColor;
4843            }
4844
4845            layout = mHintLayout;
4846        }
4847
4848        mTextPaint.setColor(color);
4849        if (mCurrentAlpha != 255) {
4850            // If set, the alpha will override the color's alpha. Multiply the alphas.
4851            mTextPaint.setAlpha((mCurrentAlpha * Color.alpha(color)) / 255);
4852        }
4853        mTextPaint.drawableState = getDrawableState();
4854
4855        canvas.save();
4856        /*  Would be faster if we didn't have to do this. Can we chop the
4857            (displayable) text so that we don't need to do this ever?
4858        */
4859
4860        int extendedPaddingTop = getExtendedPaddingTop();
4861        int extendedPaddingBottom = getExtendedPaddingBottom();
4862
4863        float clipLeft = compoundPaddingLeft + scrollX;
4864        float clipTop = extendedPaddingTop + scrollY;
4865        float clipRight = right - left - compoundPaddingRight + scrollX;
4866        float clipBottom = bottom - top - extendedPaddingBottom + scrollY;
4867
4868        if (mShadowRadius != 0) {
4869            clipLeft += Math.min(0, mShadowDx - mShadowRadius);
4870            clipRight += Math.max(0, mShadowDx + mShadowRadius);
4871
4872            clipTop += Math.min(0, mShadowDy - mShadowRadius);
4873            clipBottom += Math.max(0, mShadowDy + mShadowRadius);
4874        }
4875
4876        canvas.clipRect(clipLeft, clipTop, clipRight, clipBottom);
4877
4878        int voffsetText = 0;
4879        int voffsetCursor = 0;
4880
4881        // translate in by our padding
4882        {
4883            /* shortcircuit calling getVerticaOffset() */
4884            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4885                voffsetText = getVerticalOffset(false);
4886                voffsetCursor = getVerticalOffset(true);
4887            }
4888            canvas.translate(compoundPaddingLeft, extendedPaddingTop + voffsetText);
4889        }
4890
4891        final int layoutDirection = getResolvedLayoutDirection();
4892        final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
4893        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
4894                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
4895            if (!mSingleLine && getLineCount() == 1 && canMarquee() &&
4896                    (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) != Gravity.LEFT) {
4897                canvas.translate(mLayout.getLineRight(0) - (mRight - mLeft -
4898                        getCompoundPaddingLeft() - getCompoundPaddingRight()), 0.0f);
4899            }
4900
4901            if (mMarquee != null && mMarquee.isRunning()) {
4902                canvas.translate(-mMarquee.mScroll, 0.0f);
4903            }
4904        }
4905
4906        Path highlight = null;
4907        int selStart = -1, selEnd = -1;
4908        boolean drawCursor = false;
4909
4910        //  If there is no movement method, then there can be no selection.
4911        //  Check that first and attempt to skip everything having to do with
4912        //  the cursor.
4913        //  XXX This is not strictly true -- a program could set the
4914        //  selection manually if it really wanted to.
4915        if (mMovement != null && (isFocused() || isPressed())) {
4916            selStart = getSelectionStart();
4917            selEnd = getSelectionEnd();
4918
4919            if (selStart >= 0) {
4920                if (mHighlightPath == null) mHighlightPath = new Path();
4921
4922                if (selStart == selEnd) {
4923                    if (isCursorVisible() &&
4924                            (SystemClock.uptimeMillis() - mShowCursor) % (2 * BLINK) < BLINK) {
4925                        if (mHighlightPathBogus) {
4926                            mHighlightPath.reset();
4927                            mLayout.getCursorPath(selStart, mHighlightPath, mText);
4928                            updateCursorsPositions();
4929                            mHighlightPathBogus = false;
4930                        }
4931
4932                        // XXX should pass to skin instead of drawing directly
4933                        mHighlightPaint.setColor(cursorcolor);
4934                        if (mCurrentAlpha != 255) {
4935                            mHighlightPaint.setAlpha(
4936                                    (mCurrentAlpha * Color.alpha(cursorcolor)) / 255);
4937                        }
4938                        mHighlightPaint.setStyle(Paint.Style.STROKE);
4939                        highlight = mHighlightPath;
4940                        drawCursor = mCursorCount > 0;
4941                    }
4942                } else if (textCanBeSelected()) {
4943                    if (mHighlightPathBogus) {
4944                        mHighlightPath.reset();
4945                        mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
4946                        mHighlightPathBogus = false;
4947                    }
4948
4949                    // XXX should pass to skin instead of drawing directly
4950                    mHighlightPaint.setColor(mHighlightColor);
4951                    if (mCurrentAlpha != 255) {
4952                        mHighlightPaint.setAlpha(
4953                                (mCurrentAlpha * Color.alpha(mHighlightColor)) / 255);
4954                    }
4955                    mHighlightPaint.setStyle(Paint.Style.FILL);
4956
4957                    highlight = mHighlightPath;
4958                }
4959            }
4960        }
4961
4962        /*  Comment out until we decide what to do about animations
4963        boolean isLinearTextOn = false;
4964        if (currentTransformation != null) {
4965            isLinearTextOn = mTextPaint.isLinearTextOn();
4966            Matrix m = currentTransformation.getMatrix();
4967            if (!m.isIdentity()) {
4968                // mTextPaint.setLinearTextOn(true);
4969            }
4970        }
4971        */
4972
4973        final InputMethodState ims = mInputMethodState;
4974        final int cursorOffsetVertical = voffsetCursor - voffsetText;
4975        if (ims != null && ims.mBatchEditNesting == 0) {
4976            InputMethodManager imm = InputMethodManager.peekInstance();
4977            if (imm != null) {
4978                if (imm.isActive(this)) {
4979                    boolean reported = false;
4980                    if (ims.mContentChanged || ims.mSelectionModeChanged) {
4981                        // We are in extract mode and the content has changed
4982                        // in some way... just report complete new text to the
4983                        // input method.
4984                        reported = reportExtractedText();
4985                    }
4986                    if (!reported && highlight != null) {
4987                        int candStart = -1;
4988                        int candEnd = -1;
4989                        if (mText instanceof Spannable) {
4990                            Spannable sp = (Spannable)mText;
4991                            candStart = EditableInputConnection.getComposingSpanStart(sp);
4992                            candEnd = EditableInputConnection.getComposingSpanEnd(sp);
4993                        }
4994                        imm.updateSelection(this, selStart, selEnd, candStart, candEnd);
4995                    }
4996                }
4997
4998                if (imm.isWatchingCursor(this) && highlight != null) {
4999                    highlight.computeBounds(ims.mTmpRectF, true);
5000                    ims.mTmpOffset[0] = ims.mTmpOffset[1] = 0;
5001
5002                    canvas.getMatrix().mapPoints(ims.mTmpOffset);
5003                    ims.mTmpRectF.offset(ims.mTmpOffset[0], ims.mTmpOffset[1]);
5004
5005                    ims.mTmpRectF.offset(0, cursorOffsetVertical);
5006
5007                    ims.mCursorRectInWindow.set((int)(ims.mTmpRectF.left + 0.5),
5008                            (int)(ims.mTmpRectF.top + 0.5),
5009                            (int)(ims.mTmpRectF.right + 0.5),
5010                            (int)(ims.mTmpRectF.bottom + 0.5));
5011
5012                    imm.updateCursor(this,
5013                            ims.mCursorRectInWindow.left, ims.mCursorRectInWindow.top,
5014                            ims.mCursorRectInWindow.right, ims.mCursorRectInWindow.bottom);
5015                }
5016            }
5017        }
5018
5019        if (mCorrectionHighlighter != null) {
5020            mCorrectionHighlighter.draw(canvas, cursorOffsetVertical);
5021        }
5022
5023        if (drawCursor) {
5024            drawCursor(canvas, cursorOffsetVertical);
5025            // Rely on the drawable entirely, do not draw the cursor line.
5026            // Has to be done after the IMM related code above which relies on the highlight.
5027            highlight = null;
5028        }
5029
5030        layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
5031
5032        if (mMarquee != null && mMarquee.shouldDrawGhost()) {
5033            canvas.translate((int) mMarquee.getGhostOffset(), 0.0f);
5034            layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
5035        }
5036
5037        /*  Comment out until we decide what to do about animations
5038        if (currentTransformation != null) {
5039            mTextPaint.setLinearTextOn(isLinearTextOn);
5040        }
5041        */
5042
5043        canvas.restore();
5044    }
5045
5046    private void updateCursorsPositions() {
5047        if (mCursorDrawableRes == 0) {
5048            mCursorCount = 0;
5049            return;
5050        }
5051
5052        final int offset = getSelectionStart();
5053        final int line = mLayout.getLineForOffset(offset);
5054        final int top = mLayout.getLineTop(line);
5055        final int bottom = mLayout.getLineTop(line + 1);
5056
5057        mCursorCount = mLayout.isLevelBoundary(offset) ? 2 : 1;
5058
5059        int middle = bottom;
5060        if (mCursorCount == 2) {
5061            // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)}
5062            middle = (top + bottom) >> 1;
5063        }
5064
5065        updateCursorPosition(0, top, middle, mLayout.getPrimaryHorizontal(offset));
5066
5067        if (mCursorCount == 2) {
5068            updateCursorPosition(1, middle, bottom, mLayout.getSecondaryHorizontal(offset));
5069        }
5070    }
5071
5072    private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) {
5073        if (mCursorDrawable[cursorIndex] == null)
5074            mCursorDrawable[cursorIndex] = mContext.getResources().getDrawable(mCursorDrawableRes);
5075
5076        if (mTempRect == null) mTempRect = new Rect();
5077
5078        mCursorDrawable[cursorIndex].getPadding(mTempRect);
5079        final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth();
5080        horizontal = Math.max(0.5f, horizontal - 0.5f);
5081        final int left = (int) (horizontal) - mTempRect.left;
5082        mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width,
5083                bottom + mTempRect.bottom);
5084    }
5085
5086    private void drawCursor(Canvas canvas, int cursorOffsetVertical) {
5087        final boolean translate = cursorOffsetVertical != 0;
5088        if (translate) canvas.translate(0, cursorOffsetVertical);
5089        for (int i = 0; i < mCursorCount; i++) {
5090            mCursorDrawable[i].draw(canvas);
5091        }
5092        if (translate) canvas.translate(0, -cursorOffsetVertical);
5093    }
5094
5095    @Override
5096    public void getFocusedRect(Rect r) {
5097        if (mLayout == null) {
5098            super.getFocusedRect(r);
5099            return;
5100        }
5101
5102        int selEnd = getSelectionEnd();
5103        if (selEnd < 0) {
5104            super.getFocusedRect(r);
5105            return;
5106        }
5107
5108        int selStart = getSelectionStart();
5109        if (selStart < 0 || selStart >= selEnd) {
5110            int line = mLayout.getLineForOffset(selEnd);
5111            r.top = mLayout.getLineTop(line);
5112            r.bottom = mLayout.getLineBottom(line);
5113            r.left = (int) mLayout.getPrimaryHorizontal(selEnd) - 2;
5114            r.right = r.left + 4;
5115        } else {
5116            int lineStart = mLayout.getLineForOffset(selStart);
5117            int lineEnd = mLayout.getLineForOffset(selEnd);
5118            r.top = mLayout.getLineTop(lineStart);
5119            r.bottom = mLayout.getLineBottom(lineEnd);
5120            if (lineStart == lineEnd) {
5121                r.left = (int) mLayout.getPrimaryHorizontal(selStart);
5122                r.right = (int) mLayout.getPrimaryHorizontal(selEnd);
5123            } else {
5124                // Selection extends across multiple lines -- the focused
5125                // rect covers the entire width.
5126                if (mHighlightPath == null) mHighlightPath = new Path();
5127                if (mHighlightPathBogus) {
5128                    mHighlightPath.reset();
5129                    mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
5130                    mHighlightPathBogus = false;
5131                }
5132                synchronized (sTempRect) {
5133                    mHighlightPath.computeBounds(sTempRect, true);
5134                    r.left = (int)sTempRect.left-1;
5135                    r.right = (int)sTempRect.right+1;
5136                }
5137            }
5138        }
5139
5140        // Adjust for padding and gravity.
5141        int paddingLeft = getCompoundPaddingLeft();
5142        int paddingTop = getExtendedPaddingTop();
5143        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5144            paddingTop += getVerticalOffset(false);
5145        }
5146        r.offset(paddingLeft, paddingTop);
5147    }
5148
5149    /**
5150     * Return the number of lines of text, or 0 if the internal Layout has not
5151     * been built.
5152     */
5153    public int getLineCount() {
5154        return mLayout != null ? mLayout.getLineCount() : 0;
5155    }
5156
5157    /**
5158     * Return the baseline for the specified line (0...getLineCount() - 1)
5159     * If bounds is not null, return the top, left, right, bottom extents
5160     * of the specified line in it. If the internal Layout has not been built,
5161     * return 0 and set bounds to (0, 0, 0, 0)
5162     * @param line which line to examine (0..getLineCount() - 1)
5163     * @param bounds Optional. If not null, it returns the extent of the line
5164     * @return the Y-coordinate of the baseline
5165     */
5166    public int getLineBounds(int line, Rect bounds) {
5167        if (mLayout == null) {
5168            if (bounds != null) {
5169                bounds.set(0, 0, 0, 0);
5170            }
5171            return 0;
5172        }
5173        else {
5174            int baseline = mLayout.getLineBounds(line, bounds);
5175
5176            int voffset = getExtendedPaddingTop();
5177            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5178                voffset += getVerticalOffset(true);
5179            }
5180            if (bounds != null) {
5181                bounds.offset(getCompoundPaddingLeft(), voffset);
5182            }
5183            return baseline + voffset;
5184        }
5185    }
5186
5187    @Override
5188    public int getBaseline() {
5189        if (mLayout == null) {
5190            return super.getBaseline();
5191        }
5192
5193        int voffset = 0;
5194        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5195            voffset = getVerticalOffset(true);
5196        }
5197
5198        return getExtendedPaddingTop() + voffset + mLayout.getLineBaseline(0);
5199    }
5200
5201    /**
5202     * @hide
5203     * @param offsetRequired
5204     */
5205    @Override
5206    protected int getFadeTop(boolean offsetRequired) {
5207        if (mLayout == null) return 0;
5208
5209        int voffset = 0;
5210        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5211            voffset = getVerticalOffset(true);
5212        }
5213
5214        if (offsetRequired) voffset += getTopPaddingOffset();
5215
5216        return getExtendedPaddingTop() + voffset;
5217    }
5218
5219    /**
5220     * @hide
5221     * @param offsetRequired
5222     */
5223    @Override
5224    protected int getFadeHeight(boolean offsetRequired) {
5225        return mLayout != null ? mLayout.getHeight() : 0;
5226    }
5227
5228    @Override
5229    public boolean onKeyPreIme(int keyCode, KeyEvent event) {
5230        if (keyCode == KeyEvent.KEYCODE_BACK) {
5231            boolean isInSelectionMode = mSelectionActionMode != null;
5232
5233            if (isInSelectionMode) {
5234                if (event.getAction() == KeyEvent.ACTION_DOWN && event.getRepeatCount() == 0) {
5235                    KeyEvent.DispatcherState state = getKeyDispatcherState();
5236                    if (state != null) {
5237                        state.startTracking(event, this);
5238                    }
5239                    return true;
5240                } else if (event.getAction() == KeyEvent.ACTION_UP) {
5241                    KeyEvent.DispatcherState state = getKeyDispatcherState();
5242                    if (state != null) {
5243                        state.handleUpEvent(event);
5244                    }
5245                    if (event.isTracking() && !event.isCanceled()) {
5246                        if (isInSelectionMode) {
5247                            stopSelectionActionMode();
5248                            return true;
5249                        }
5250                    }
5251                }
5252            }
5253        }
5254        return super.onKeyPreIme(keyCode, event);
5255    }
5256
5257    @Override
5258    public boolean onKeyDown(int keyCode, KeyEvent event) {
5259        int which = doKeyDown(keyCode, event, null);
5260        if (which == 0) {
5261            // Go through default dispatching.
5262            return super.onKeyDown(keyCode, event);
5263        }
5264
5265        return true;
5266    }
5267
5268    @Override
5269    public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) {
5270        KeyEvent down = KeyEvent.changeAction(event, KeyEvent.ACTION_DOWN);
5271
5272        int which = doKeyDown(keyCode, down, event);
5273        if (which == 0) {
5274            // Go through default dispatching.
5275            return super.onKeyMultiple(keyCode, repeatCount, event);
5276        }
5277        if (which == -1) {
5278            // Consumed the whole thing.
5279            return true;
5280        }
5281
5282        repeatCount--;
5283
5284        // We are going to dispatch the remaining events to either the input
5285        // or movement method.  To do this, we will just send a repeated stream
5286        // of down and up events until we have done the complete repeatCount.
5287        // It would be nice if those interfaces had an onKeyMultiple() method,
5288        // but adding that is a more complicated change.
5289        KeyEvent up = KeyEvent.changeAction(event, KeyEvent.ACTION_UP);
5290        if (which == 1) {
5291            mInput.onKeyUp(this, (Editable)mText, keyCode, up);
5292            while (--repeatCount > 0) {
5293                mInput.onKeyDown(this, (Editable)mText, keyCode, down);
5294                mInput.onKeyUp(this, (Editable)mText, keyCode, up);
5295            }
5296            hideErrorIfUnchanged();
5297
5298        } else if (which == 2) {
5299            mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
5300            while (--repeatCount > 0) {
5301                mMovement.onKeyDown(this, (Spannable)mText, keyCode, down);
5302                mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
5303            }
5304        }
5305
5306        return true;
5307    }
5308
5309    /**
5310     * Returns true if pressing ENTER in this field advances focus instead
5311     * of inserting the character.  This is true mostly in single-line fields,
5312     * but also in mail addresses and subjects which will display on multiple
5313     * lines but where it doesn't make sense to insert newlines.
5314     */
5315    private boolean shouldAdvanceFocusOnEnter() {
5316        if (mInput == null) {
5317            return false;
5318        }
5319
5320        if (mSingleLine) {
5321            return true;
5322        }
5323
5324        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
5325            int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
5326            if (variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_ADDRESS
5327                    || variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT) {
5328                return true;
5329            }
5330        }
5331
5332        return false;
5333    }
5334
5335    /**
5336     * Returns true if pressing TAB in this field advances focus instead
5337     * of inserting the character.  Insert tabs only in multi-line editors.
5338     */
5339    private boolean shouldAdvanceFocusOnTab() {
5340        if (mInput != null && !mSingleLine) {
5341            if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
5342                int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
5343                if (variation == EditorInfo.TYPE_TEXT_FLAG_IME_MULTI_LINE
5344                        || variation == EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE) {
5345                    return false;
5346                }
5347            }
5348        }
5349        return true;
5350    }
5351
5352    private int doKeyDown(int keyCode, KeyEvent event, KeyEvent otherEvent) {
5353        if (!isEnabled()) {
5354            return 0;
5355        }
5356
5357        switch (keyCode) {
5358            case KeyEvent.KEYCODE_ENTER:
5359                if (event.hasNoModifiers()) {
5360                    // When mInputContentType is set, we know that we are
5361                    // running in a "modern" cupcake environment, so don't need
5362                    // to worry about the application trying to capture
5363                    // enter key events.
5364                    if (mInputContentType != null) {
5365                        // If there is an action listener, given them a
5366                        // chance to consume the event.
5367                        if (mInputContentType.onEditorActionListener != null &&
5368                                mInputContentType.onEditorActionListener.onEditorAction(
5369                                this, EditorInfo.IME_NULL, event)) {
5370                            mInputContentType.enterDown = true;
5371                            // We are consuming the enter key for them.
5372                            return -1;
5373                        }
5374                    }
5375
5376                    // If our editor should move focus when enter is pressed, or
5377                    // this is a generated event from an IME action button, then
5378                    // don't let it be inserted into the text.
5379                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
5380                            || shouldAdvanceFocusOnEnter()) {
5381                        if (hasOnClickListeners()) {
5382                            return 0;
5383                        }
5384                        return -1;
5385                    }
5386                }
5387                break;
5388
5389            case KeyEvent.KEYCODE_DPAD_CENTER:
5390                if (event.hasNoModifiers()) {
5391                    if (shouldAdvanceFocusOnEnter()) {
5392                        return 0;
5393                    }
5394                }
5395                break;
5396
5397            case KeyEvent.KEYCODE_TAB:
5398                if (event.hasNoModifiers() || event.hasModifiers(KeyEvent.META_SHIFT_ON)) {
5399                    if (shouldAdvanceFocusOnTab()) {
5400                        return 0;
5401                    }
5402                }
5403                break;
5404
5405                // Has to be done on key down (and not on key up) to correctly be intercepted.
5406            case KeyEvent.KEYCODE_BACK:
5407                if (mSelectionActionMode != null) {
5408                    stopSelectionActionMode();
5409                    return -1;
5410                }
5411                break;
5412        }
5413
5414        if (mInput != null) {
5415            resetErrorChangedFlag();
5416
5417            boolean doDown = true;
5418            if (otherEvent != null) {
5419                try {
5420                    beginBatchEdit();
5421                    final boolean handled = mInput.onKeyOther(this, (Editable) mText, otherEvent);
5422                    hideErrorIfUnchanged();
5423                    doDown = false;
5424                    if (handled) {
5425                        return -1;
5426                    }
5427                } catch (AbstractMethodError e) {
5428                    // onKeyOther was added after 1.0, so if it isn't
5429                    // implemented we need to try to dispatch as a regular down.
5430                } finally {
5431                    endBatchEdit();
5432                }
5433            }
5434
5435            if (doDown) {
5436                beginBatchEdit();
5437                final boolean handled = mInput.onKeyDown(this, (Editable) mText, keyCode, event);
5438                endBatchEdit();
5439                hideErrorIfUnchanged();
5440                if (handled) return 1;
5441            }
5442        }
5443
5444        // bug 650865: sometimes we get a key event before a layout.
5445        // don't try to move around if we don't know the layout.
5446
5447        if (mMovement != null && mLayout != null) {
5448            boolean doDown = true;
5449            if (otherEvent != null) {
5450                try {
5451                    boolean handled = mMovement.onKeyOther(this, (Spannable) mText,
5452                            otherEvent);
5453                    doDown = false;
5454                    if (handled) {
5455                        return -1;
5456                    }
5457                } catch (AbstractMethodError e) {
5458                    // onKeyOther was added after 1.0, so if it isn't
5459                    // implemented we need to try to dispatch as a regular down.
5460                }
5461            }
5462            if (doDown) {
5463                if (mMovement.onKeyDown(this, (Spannable)mText, keyCode, event))
5464                    return 2;
5465            }
5466        }
5467
5468        return 0;
5469    }
5470
5471    /**
5472     * Resets the mErrorWasChanged flag, so that future calls to {@link #setError(CharSequence)}
5473     * can be recorded.
5474     * @hide
5475     */
5476    public void resetErrorChangedFlag() {
5477        /*
5478         * Keep track of what the error was before doing the input
5479         * so that if an input filter changed the error, we leave
5480         * that error showing.  Otherwise, we take down whatever
5481         * error was showing when the user types something.
5482         */
5483        mErrorWasChanged = false;
5484    }
5485
5486    /**
5487     * @hide
5488     */
5489    public void hideErrorIfUnchanged() {
5490        if (mError != null && !mErrorWasChanged) {
5491            setError(null, null);
5492        }
5493    }
5494
5495    @Override
5496    public boolean onKeyUp(int keyCode, KeyEvent event) {
5497        if (!isEnabled()) {
5498            return super.onKeyUp(keyCode, event);
5499        }
5500
5501        switch (keyCode) {
5502            case KeyEvent.KEYCODE_DPAD_CENTER:
5503                if (event.hasNoModifiers()) {
5504                    /*
5505                     * If there is a click listener, just call through to
5506                     * super, which will invoke it.
5507                     *
5508                     * If there isn't a click listener, try to show the soft
5509                     * input method.  (It will also
5510                     * call performClick(), but that won't do anything in
5511                     * this case.)
5512                     */
5513                    if (!hasOnClickListeners()) {
5514                        if (mMovement != null && mText instanceof Editable
5515                                && mLayout != null && onCheckIsTextEditor()) {
5516                            InputMethodManager imm = InputMethodManager.peekInstance();
5517                            viewClicked(imm);
5518                            if (imm != null && mSoftInputShownOnFocus) {
5519                                imm.showSoftInput(this, 0);
5520                            }
5521                        }
5522                    }
5523                }
5524                return super.onKeyUp(keyCode, event);
5525
5526            case KeyEvent.KEYCODE_ENTER:
5527                if (event.hasNoModifiers()) {
5528                    if (mInputContentType != null
5529                            && mInputContentType.onEditorActionListener != null
5530                            && mInputContentType.enterDown) {
5531                        mInputContentType.enterDown = false;
5532                        if (mInputContentType.onEditorActionListener.onEditorAction(
5533                                this, EditorInfo.IME_NULL, event)) {
5534                            return true;
5535                        }
5536                    }
5537
5538                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
5539                            || shouldAdvanceFocusOnEnter()) {
5540                        /*
5541                         * If there is a click listener, just call through to
5542                         * super, which will invoke it.
5543                         *
5544                         * If there isn't a click listener, try to advance focus,
5545                         * but still call through to super, which will reset the
5546                         * pressed state and longpress state.  (It will also
5547                         * call performClick(), but that won't do anything in
5548                         * this case.)
5549                         */
5550                        if (!hasOnClickListeners()) {
5551                            View v = focusSearch(FOCUS_DOWN);
5552
5553                            if (v != null) {
5554                                if (!v.requestFocus(FOCUS_DOWN)) {
5555                                    throw new IllegalStateException(
5556                                            "focus search returned a view " +
5557                                            "that wasn't able to take focus!");
5558                                }
5559
5560                                /*
5561                                 * Return true because we handled the key; super
5562                                 * will return false because there was no click
5563                                 * listener.
5564                                 */
5565                                super.onKeyUp(keyCode, event);
5566                                return true;
5567                            } else if ((event.getFlags()
5568                                    & KeyEvent.FLAG_EDITOR_ACTION) != 0) {
5569                                // No target for next focus, but make sure the IME
5570                                // if this came from it.
5571                                InputMethodManager imm = InputMethodManager.peekInstance();
5572                                if (imm != null && imm.isActive(this)) {
5573                                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
5574                                }
5575                            }
5576                        }
5577                    }
5578                    return super.onKeyUp(keyCode, event);
5579                }
5580                break;
5581        }
5582
5583        if (mInput != null)
5584            if (mInput.onKeyUp(this, (Editable) mText, keyCode, event))
5585                return true;
5586
5587        if (mMovement != null && mLayout != null)
5588            if (mMovement.onKeyUp(this, (Spannable) mText, keyCode, event))
5589                return true;
5590
5591        return super.onKeyUp(keyCode, event);
5592    }
5593
5594    @Override public boolean onCheckIsTextEditor() {
5595        return mInputType != EditorInfo.TYPE_NULL;
5596    }
5597
5598    @Override public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
5599        if (onCheckIsTextEditor() && isEnabled()) {
5600            if (mInputMethodState == null) {
5601                mInputMethodState = new InputMethodState();
5602            }
5603            outAttrs.inputType = mInputType;
5604            if (mInputContentType != null) {
5605                outAttrs.imeOptions = mInputContentType.imeOptions;
5606                outAttrs.privateImeOptions = mInputContentType.privateImeOptions;
5607                outAttrs.actionLabel = mInputContentType.imeActionLabel;
5608                outAttrs.actionId = mInputContentType.imeActionId;
5609                outAttrs.extras = mInputContentType.extras;
5610            } else {
5611                outAttrs.imeOptions = EditorInfo.IME_NULL;
5612            }
5613            if (focusSearch(FOCUS_DOWN) != null) {
5614                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_NEXT;
5615            }
5616            if (focusSearch(FOCUS_UP) != null) {
5617                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_PREVIOUS;
5618            }
5619            if ((outAttrs.imeOptions&EditorInfo.IME_MASK_ACTION)
5620                    == EditorInfo.IME_ACTION_UNSPECIFIED) {
5621                if ((outAttrs.imeOptions&EditorInfo.IME_FLAG_NAVIGATE_NEXT) != 0) {
5622                    // An action has not been set, but the enter key will move to
5623                    // the next focus, so set the action to that.
5624                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_NEXT;
5625                } else {
5626                    // An action has not been set, and there is no focus to move
5627                    // to, so let's just supply a "done" action.
5628                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_DONE;
5629                }
5630                if (!shouldAdvanceFocusOnEnter()) {
5631                    outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5632                }
5633            }
5634            if (isMultilineInputType(outAttrs.inputType)) {
5635                // Multi-line text editors should always show an enter key.
5636                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5637            }
5638            outAttrs.hintText = mHint;
5639            if (mText instanceof Editable) {
5640                InputConnection ic = new EditableInputConnection(this);
5641                outAttrs.initialSelStart = getSelectionStart();
5642                outAttrs.initialSelEnd = getSelectionEnd();
5643                outAttrs.initialCapsMode = ic.getCursorCapsMode(mInputType);
5644                return ic;
5645            }
5646        }
5647        return null;
5648    }
5649
5650    /**
5651     * If this TextView contains editable content, extract a portion of it
5652     * based on the information in <var>request</var> in to <var>outText</var>.
5653     * @return Returns true if the text was successfully extracted, else false.
5654     */
5655    public boolean extractText(ExtractedTextRequest request,
5656            ExtractedText outText) {
5657        return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN,
5658                EXTRACT_UNKNOWN, outText);
5659    }
5660
5661    static final int EXTRACT_NOTHING = -2;
5662    static final int EXTRACT_UNKNOWN = -1;
5663
5664    boolean extractTextInternal(ExtractedTextRequest request,
5665            int partialStartOffset, int partialEndOffset, int delta,
5666            ExtractedText outText) {
5667        final CharSequence content = mText;
5668        if (content != null) {
5669            if (partialStartOffset != EXTRACT_NOTHING) {
5670                final int N = content.length();
5671                if (partialStartOffset < 0) {
5672                    outText.partialStartOffset = outText.partialEndOffset = -1;
5673                    partialStartOffset = 0;
5674                    partialEndOffset = N;
5675                } else {
5676                    // Now use the delta to determine the actual amount of text
5677                    // we need.
5678                    partialEndOffset += delta;
5679                    // Adjust offsets to ensure we contain full spans.
5680                    if (content instanceof Spanned) {
5681                        Spanned spanned = (Spanned)content;
5682                        Object[] spans = spanned.getSpans(partialStartOffset,
5683                                partialEndOffset, ParcelableSpan.class);
5684                        int i = spans.length;
5685                        while (i > 0) {
5686                            i--;
5687                            int j = spanned.getSpanStart(spans[i]);
5688                            if (j < partialStartOffset) partialStartOffset = j;
5689                            j = spanned.getSpanEnd(spans[i]);
5690                            if (j > partialEndOffset) partialEndOffset = j;
5691                        }
5692                    }
5693                    outText.partialStartOffset = partialStartOffset;
5694                    outText.partialEndOffset = partialEndOffset - delta;
5695
5696                    if (partialStartOffset > N) {
5697                        partialStartOffset = N;
5698                    } else if (partialStartOffset < 0) {
5699                        partialStartOffset = 0;
5700                    }
5701                    if (partialEndOffset > N) {
5702                        partialEndOffset = N;
5703                    } else if (partialEndOffset < 0) {
5704                        partialEndOffset = 0;
5705                    }
5706                }
5707                if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) {
5708                    outText.text = content.subSequence(partialStartOffset,
5709                            partialEndOffset);
5710                } else {
5711                    outText.text = TextUtils.substring(content, partialStartOffset,
5712                            partialEndOffset);
5713                }
5714            } else {
5715                outText.partialStartOffset = 0;
5716                outText.partialEndOffset = 0;
5717                outText.text = "";
5718            }
5719            outText.flags = 0;
5720            if (MetaKeyKeyListener.getMetaState(mText, MetaKeyKeyListener.META_SELECTING) != 0) {
5721                outText.flags |= ExtractedText.FLAG_SELECTING;
5722            }
5723            if (mSingleLine) {
5724                outText.flags |= ExtractedText.FLAG_SINGLE_LINE;
5725            }
5726            outText.startOffset = 0;
5727            outText.selectionStart = getSelectionStart();
5728            outText.selectionEnd = getSelectionEnd();
5729            return true;
5730        }
5731        return false;
5732    }
5733
5734    boolean reportExtractedText() {
5735        final InputMethodState ims = mInputMethodState;
5736        if (ims != null) {
5737            final boolean contentChanged = ims.mContentChanged;
5738            if (contentChanged || ims.mSelectionModeChanged) {
5739                ims.mContentChanged = false;
5740                ims.mSelectionModeChanged = false;
5741                final ExtractedTextRequest req = mInputMethodState.mExtracting;
5742                if (req != null) {
5743                    InputMethodManager imm = InputMethodManager.peekInstance();
5744                    if (imm != null) {
5745                        if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Retrieving extracted start="
5746                                + ims.mChangedStart + " end=" + ims.mChangedEnd
5747                                + " delta=" + ims.mChangedDelta);
5748                        if (ims.mChangedStart < 0 && !contentChanged) {
5749                            ims.mChangedStart = EXTRACT_NOTHING;
5750                        }
5751                        if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd,
5752                                ims.mChangedDelta, ims.mTmpExtracted)) {
5753                            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Reporting extracted start="
5754                                    + ims.mTmpExtracted.partialStartOffset
5755                                    + " end=" + ims.mTmpExtracted.partialEndOffset
5756                                    + ": " + ims.mTmpExtracted.text);
5757                            imm.updateExtractedText(this, req.token,
5758                                    mInputMethodState.mTmpExtracted);
5759                            ims.mChangedStart = EXTRACT_UNKNOWN;
5760                            ims.mChangedEnd = EXTRACT_UNKNOWN;
5761                            ims.mChangedDelta = 0;
5762                            ims.mContentChanged = false;
5763                            return true;
5764                        }
5765                    }
5766                }
5767            }
5768        }
5769        return false;
5770    }
5771
5772    /**
5773     * This is used to remove all style-impacting spans from text before new
5774     * extracted text is being replaced into it, so that we don't have any
5775     * lingering spans applied during the replace.
5776     */
5777    static void removeParcelableSpans(Spannable spannable, int start, int end) {
5778        Object[] spans = spannable.getSpans(start, end, ParcelableSpan.class);
5779        int i = spans.length;
5780        while (i > 0) {
5781            i--;
5782            spannable.removeSpan(spans[i]);
5783        }
5784    }
5785
5786    /**
5787     * Apply to this text view the given extracted text, as previously
5788     * returned by {@link #extractText(ExtractedTextRequest, ExtractedText)}.
5789     */
5790    public void setExtractedText(ExtractedText text) {
5791        Editable content = getEditableText();
5792        if (text.text != null) {
5793            if (content == null) {
5794                setText(text.text, TextView.BufferType.EDITABLE);
5795            } else if (text.partialStartOffset < 0) {
5796                removeParcelableSpans(content, 0, content.length());
5797                content.replace(0, content.length(), text.text);
5798            } else {
5799                final int N = content.length();
5800                int start = text.partialStartOffset;
5801                if (start > N) start = N;
5802                int end = text.partialEndOffset;
5803                if (end > N) end = N;
5804                removeParcelableSpans(content, start, end);
5805                content.replace(start, end, text.text);
5806            }
5807        }
5808
5809        // Now set the selection position...  make sure it is in range, to
5810        // avoid crashes.  If this is a partial update, it is possible that
5811        // the underlying text may have changed, causing us problems here.
5812        // Also we just don't want to trust clients to do the right thing.
5813        Spannable sp = (Spannable)getText();
5814        final int N = sp.length();
5815        int start = text.selectionStart;
5816        if (start < 0) start = 0;
5817        else if (start > N) start = N;
5818        int end = text.selectionEnd;
5819        if (end < 0) end = 0;
5820        else if (end > N) end = N;
5821        Selection.setSelection(sp, start, end);
5822
5823        // Finally, update the selection mode.
5824        if ((text.flags&ExtractedText.FLAG_SELECTING) != 0) {
5825            MetaKeyKeyListener.startSelecting(this, sp);
5826        } else {
5827            MetaKeyKeyListener.stopSelecting(this, sp);
5828        }
5829    }
5830
5831    /**
5832     * @hide
5833     */
5834    public void setExtracting(ExtractedTextRequest req) {
5835        if (mInputMethodState != null) {
5836            mInputMethodState.mExtracting = req;
5837        }
5838        // This would stop a possible selection mode, but no such mode is started in case
5839        // extracted mode will start. Some text is selected though, and will trigger an action mode
5840        // in the extracted view.
5841        hideControllers();
5842    }
5843
5844    /**
5845     * Called by the framework in response to a text completion from
5846     * the current input method, provided by it calling
5847     * {@link InputConnection#commitCompletion
5848     * InputConnection.commitCompletion()}.  The default implementation does
5849     * nothing; text views that are supporting auto-completion should override
5850     * this to do their desired behavior.
5851     *
5852     * @param text The auto complete text the user has selected.
5853     */
5854    public void onCommitCompletion(CompletionInfo text) {
5855        // intentionally empty
5856    }
5857
5858    /**
5859     * Called by the framework in response to a text auto-correction (such as fixing a typo using a
5860     * a dictionnary) from the current input method, provided by it calling
5861     * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default
5862     * implementation flashes the background of the corrected word to provide feedback to the user.
5863     *
5864     * @param info The auto correct info about the text that was corrected.
5865     */
5866    public void onCommitCorrection(CorrectionInfo info) {
5867        if (mCorrectionHighlighter == null) {
5868            mCorrectionHighlighter = new CorrectionHighlighter();
5869        } else {
5870            mCorrectionHighlighter.invalidate(false);
5871        }
5872
5873        mCorrectionHighlighter.highlight(info);
5874    }
5875
5876    private class CorrectionHighlighter {
5877        private final Path mPath = new Path();
5878        private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
5879        private int mStart, mEnd;
5880        private long mFadingStartTime;
5881        private final static int FADE_OUT_DURATION = 400;
5882
5883        public CorrectionHighlighter() {
5884            mPaint.setCompatibilityScaling(getResources().getCompatibilityInfo().applicationScale);
5885            mPaint.setStyle(Paint.Style.FILL);
5886        }
5887
5888        public void highlight(CorrectionInfo info) {
5889            mStart = info.getOffset();
5890            mEnd = mStart + info.getNewText().length();
5891            mFadingStartTime = SystemClock.uptimeMillis();
5892
5893            if (mStart < 0 || mEnd < 0) {
5894                stopAnimation();
5895            }
5896        }
5897
5898        public void draw(Canvas canvas, int cursorOffsetVertical) {
5899            if (updatePath() && updatePaint()) {
5900                if (cursorOffsetVertical != 0) {
5901                    canvas.translate(0, cursorOffsetVertical);
5902                }
5903
5904                canvas.drawPath(mPath, mPaint);
5905
5906                if (cursorOffsetVertical != 0) {
5907                    canvas.translate(0, -cursorOffsetVertical);
5908                }
5909                invalidate(true); // TODO invalidate cursor region only
5910            } else {
5911                stopAnimation();
5912                invalidate(false); // TODO invalidate cursor region only
5913            }
5914        }
5915
5916        private boolean updatePaint() {
5917            final long duration = SystemClock.uptimeMillis() - mFadingStartTime;
5918            if (duration > FADE_OUT_DURATION) return false;
5919
5920            final float coef = 1.0f - (float) duration / FADE_OUT_DURATION;
5921            final int highlightColorAlpha = Color.alpha(mHighlightColor);
5922            final int color = (mHighlightColor & 0x00FFFFFF) +
5923                    ((int) (highlightColorAlpha * coef) << 24);
5924            mPaint.setColor(color);
5925            return true;
5926        }
5927
5928        private boolean updatePath() {
5929            final Layout layout = TextView.this.mLayout;
5930            if (layout == null) return false;
5931
5932            // Update in case text is edited while the animation is run
5933            final int length = mText.length();
5934            int start = Math.min(length, mStart);
5935            int end = Math.min(length, mEnd);
5936
5937            mPath.reset();
5938            TextView.this.mLayout.getSelectionPath(start, end, mPath);
5939            return true;
5940        }
5941
5942        private void invalidate(boolean delayed) {
5943            if (TextView.this.mLayout == null) return;
5944
5945            synchronized (sTempRect) {
5946                mPath.computeBounds(sTempRect, false);
5947
5948                int left = getCompoundPaddingLeft();
5949                int top = getExtendedPaddingTop() + getVerticalOffset(true);
5950
5951                if (delayed) {
5952                    TextView.this.postInvalidateDelayed(16, // 60 Hz update
5953                            left + (int) sTempRect.left, top + (int) sTempRect.top,
5954                            left + (int) sTempRect.right, top + (int) sTempRect.bottom);
5955                } else {
5956                    TextView.this.postInvalidate((int) sTempRect.left, (int) sTempRect.top,
5957                            (int) sTempRect.right, (int) sTempRect.bottom);
5958                }
5959            }
5960        }
5961
5962        private void stopAnimation() {
5963            TextView.this.mCorrectionHighlighter = null;
5964        }
5965    }
5966
5967    public void beginBatchEdit() {
5968        mInBatchEditControllers = true;
5969        final InputMethodState ims = mInputMethodState;
5970        if (ims != null) {
5971            int nesting = ++ims.mBatchEditNesting;
5972            if (nesting == 1) {
5973                ims.mCursorChanged = false;
5974                ims.mChangedDelta = 0;
5975                if (ims.mContentChanged) {
5976                    // We already have a pending change from somewhere else,
5977                    // so turn this into a full update.
5978                    ims.mChangedStart = 0;
5979                    ims.mChangedEnd = mText.length();
5980                } else {
5981                    ims.mChangedStart = EXTRACT_UNKNOWN;
5982                    ims.mChangedEnd = EXTRACT_UNKNOWN;
5983                    ims.mContentChanged = false;
5984                }
5985                onBeginBatchEdit();
5986            }
5987        }
5988    }
5989
5990    public void endBatchEdit() {
5991        mInBatchEditControllers = false;
5992        final InputMethodState ims = mInputMethodState;
5993        if (ims != null) {
5994            int nesting = --ims.mBatchEditNesting;
5995            if (nesting == 0) {
5996                finishBatchEdit(ims);
5997            }
5998        }
5999    }
6000
6001    void ensureEndedBatchEdit() {
6002        final InputMethodState ims = mInputMethodState;
6003        if (ims != null && ims.mBatchEditNesting != 0) {
6004            ims.mBatchEditNesting = 0;
6005            finishBatchEdit(ims);
6006        }
6007    }
6008
6009    void finishBatchEdit(final InputMethodState ims) {
6010        onEndBatchEdit();
6011
6012        if (ims.mContentChanged || ims.mSelectionModeChanged) {
6013            updateAfterEdit();
6014            reportExtractedText();
6015        } else if (ims.mCursorChanged) {
6016            // Cheezy way to get us to report the current cursor location.
6017            invalidateCursor();
6018        }
6019    }
6020
6021    void updateAfterEdit() {
6022        invalidate();
6023        int curs = getSelectionStart();
6024
6025        if (curs >= 0 || (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6026            registerForPreDraw();
6027        }
6028
6029        if (curs >= 0) {
6030            mHighlightPathBogus = true;
6031            makeBlink();
6032            bringPointIntoView(curs);
6033        }
6034
6035        checkForResize();
6036    }
6037
6038    /**
6039     * Called by the framework in response to a request to begin a batch
6040     * of edit operations through a call to link {@link #beginBatchEdit()}.
6041     */
6042    public void onBeginBatchEdit() {
6043        // intentionally empty
6044    }
6045
6046    /**
6047     * Called by the framework in response to a request to end a batch
6048     * of edit operations through a call to link {@link #endBatchEdit}.
6049     */
6050    public void onEndBatchEdit() {
6051        // intentionally empty
6052    }
6053
6054    /**
6055     * Called by the framework in response to a private command from the
6056     * current method, provided by it calling
6057     * {@link InputConnection#performPrivateCommand
6058     * InputConnection.performPrivateCommand()}.
6059     *
6060     * @param action The action name of the command.
6061     * @param data Any additional data for the command.  This may be null.
6062     * @return Return true if you handled the command, else false.
6063     */
6064    public boolean onPrivateIMECommand(String action, Bundle data) {
6065        return false;
6066    }
6067
6068    private void nullLayouts() {
6069        if (mLayout instanceof BoringLayout && mSavedLayout == null) {
6070            mSavedLayout = (BoringLayout) mLayout;
6071        }
6072        if (mHintLayout instanceof BoringLayout && mSavedHintLayout == null) {
6073            mSavedHintLayout = (BoringLayout) mHintLayout;
6074        }
6075
6076        mSavedMarqueeModeLayout = mLayout = mHintLayout = null;
6077
6078        mBoring = mHintBoring = null;
6079
6080        // Since it depends on the value of mLayout
6081        prepareCursorControllers();
6082    }
6083
6084    /**
6085     * Make a new Layout based on the already-measured size of the view,
6086     * on the assumption that it was measured correctly at some point.
6087     */
6088    private void assumeLayout() {
6089        int width = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6090
6091        if (width < 1) {
6092            width = 0;
6093        }
6094
6095        int physicalWidth = width;
6096
6097        if (mHorizontallyScrolling) {
6098            width = VERY_WIDE;
6099        }
6100
6101        makeNewLayout(width, physicalWidth, UNKNOWN_BORING, UNKNOWN_BORING,
6102                      physicalWidth, false);
6103    }
6104
6105    @Override
6106    protected void resetResolvedLayoutDirection() {
6107        super.resetResolvedLayoutDirection();
6108
6109        if (mLayoutAlignment != null &&
6110                (mTextAlign == TextAlign.VIEW_START ||
6111                mTextAlign == TextAlign.VIEW_END)) {
6112            mLayoutAlignment = null;
6113        }
6114    }
6115
6116    private Layout.Alignment getLayoutAlignment() {
6117        if (mLayoutAlignment == null) {
6118            Layout.Alignment alignment;
6119            TextAlign textAlign = mTextAlign;
6120            switch (textAlign) {
6121                case INHERIT:
6122                    // fall through to gravity temporarily
6123                    // intention is to inherit value through view hierarchy.
6124                case GRAVITY:
6125                    switch (mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) {
6126                        case Gravity.START:
6127                            alignment = Layout.Alignment.ALIGN_NORMAL;
6128                            break;
6129                        case Gravity.END:
6130                            alignment = Layout.Alignment.ALIGN_OPPOSITE;
6131                            break;
6132                        case Gravity.LEFT:
6133                            alignment = Layout.Alignment.ALIGN_LEFT;
6134                            break;
6135                        case Gravity.RIGHT:
6136                            alignment = Layout.Alignment.ALIGN_RIGHT;
6137                            break;
6138                        case Gravity.CENTER_HORIZONTAL:
6139                            alignment = Layout.Alignment.ALIGN_CENTER;
6140                            break;
6141                        default:
6142                            alignment = Layout.Alignment.ALIGN_NORMAL;
6143                            break;
6144                    }
6145                    break;
6146                case TEXT_START:
6147                    alignment = Layout.Alignment.ALIGN_NORMAL;
6148                    break;
6149                case TEXT_END:
6150                    alignment = Layout.Alignment.ALIGN_OPPOSITE;
6151                    break;
6152                case CENTER:
6153                    alignment = Layout.Alignment.ALIGN_CENTER;
6154                    break;
6155                case VIEW_START:
6156                    alignment = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
6157                            Layout.Alignment.ALIGN_RIGHT : Layout.Alignment.ALIGN_LEFT;
6158                    break;
6159                case VIEW_END:
6160                    alignment = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
6161                            Layout.Alignment.ALIGN_LEFT : Layout.Alignment.ALIGN_RIGHT;
6162                    break;
6163                default:
6164                    alignment = Layout.Alignment.ALIGN_NORMAL;
6165                    break;
6166            }
6167            mLayoutAlignment = alignment;
6168        }
6169        return mLayoutAlignment;
6170    }
6171
6172    /**
6173     * The width passed in is now the desired layout width,
6174     * not the full view width with padding.
6175     * {@hide}
6176     */
6177    protected void makeNewLayout(int wantWidth, int hintWidth,
6178                                 BoringLayout.Metrics boring,
6179                                 BoringLayout.Metrics hintBoring,
6180                                 int ellipsisWidth, boolean bringIntoView) {
6181        stopMarquee();
6182
6183        // Update "old" cached values
6184        mOldMaximum = mMaximum;
6185        mOldMaxMode = mMaxMode;
6186
6187        mHighlightPathBogus = true;
6188
6189        if (wantWidth < 0) {
6190            wantWidth = 0;
6191        }
6192        if (hintWidth < 0) {
6193            hintWidth = 0;
6194        }
6195
6196        Layout.Alignment alignment = getLayoutAlignment();
6197        boolean shouldEllipsize = mEllipsize != null && mInput == null;
6198        final boolean switchEllipsize = mEllipsize == TruncateAt.MARQUEE &&
6199                mMarqueeFadeMode != MARQUEE_FADE_NORMAL;
6200        TruncateAt effectiveEllipsize = mEllipsize;
6201        if (mEllipsize == TruncateAt.MARQUEE &&
6202                mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
6203            effectiveEllipsize = TruncateAt.END_SMALL;
6204        }
6205
6206        if (mTextDir == null) {
6207            resolveTextDirection();
6208        }
6209
6210        mLayout = makeSingleLayout(wantWidth, boring, ellipsisWidth, alignment, shouldEllipsize,
6211                effectiveEllipsize, effectiveEllipsize == mEllipsize);
6212        if (switchEllipsize) {
6213            TruncateAt oppositeEllipsize = effectiveEllipsize == TruncateAt.MARQUEE ?
6214                    TruncateAt.END : TruncateAt.MARQUEE;
6215            mSavedMarqueeModeLayout = makeSingleLayout(wantWidth, boring, ellipsisWidth, alignment,
6216                    shouldEllipsize, oppositeEllipsize, effectiveEllipsize != mEllipsize);
6217        }
6218
6219        shouldEllipsize = mEllipsize != null;
6220        mHintLayout = null;
6221
6222        if (mHint != null) {
6223            if (shouldEllipsize) hintWidth = wantWidth;
6224
6225            if (hintBoring == UNKNOWN_BORING) {
6226                hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mTextDir,
6227                                                   mHintBoring);
6228                if (hintBoring != null) {
6229                    mHintBoring = hintBoring;
6230                }
6231            }
6232
6233            if (hintBoring != null) {
6234                if (hintBoring.width <= hintWidth &&
6235                    (!shouldEllipsize || hintBoring.width <= ellipsisWidth)) {
6236                    if (mSavedHintLayout != null) {
6237                        mHintLayout = mSavedHintLayout.
6238                                replaceOrMake(mHint, mTextPaint,
6239                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6240                                hintBoring, mIncludePad);
6241                    } else {
6242                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6243                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6244                                hintBoring, mIncludePad);
6245                    }
6246
6247                    mSavedHintLayout = (BoringLayout) mHintLayout;
6248                } else if (shouldEllipsize && hintBoring.width <= hintWidth) {
6249                    if (mSavedHintLayout != null) {
6250                        mHintLayout = mSavedHintLayout.
6251                                replaceOrMake(mHint, mTextPaint,
6252                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6253                                hintBoring, mIncludePad, mEllipsize,
6254                                ellipsisWidth);
6255                    } else {
6256                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6257                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6258                                hintBoring, mIncludePad, mEllipsize,
6259                                ellipsisWidth);
6260                    }
6261                } else if (shouldEllipsize) {
6262                    mHintLayout = new StaticLayout(mHint,
6263                                0, mHint.length(),
6264                                mTextPaint, hintWidth, alignment, mTextDir, mSpacingMult,
6265                                mSpacingAdd, mIncludePad, mEllipsize,
6266                                ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6267                } else {
6268                    mHintLayout = new StaticLayout(mHint, mTextPaint,
6269                            hintWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6270                            mIncludePad);
6271                }
6272            } else if (shouldEllipsize) {
6273                mHintLayout = new StaticLayout(mHint,
6274                            0, mHint.length(),
6275                            mTextPaint, hintWidth, alignment, mTextDir, mSpacingMult,
6276                            mSpacingAdd, mIncludePad, mEllipsize,
6277                            ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6278            } else {
6279                mHintLayout = new StaticLayout(mHint, mTextPaint,
6280                        hintWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6281                        mIncludePad);
6282            }
6283        }
6284
6285        if (bringIntoView) {
6286            registerForPreDraw();
6287        }
6288
6289        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6290            if (!compressText(ellipsisWidth)) {
6291                final int height = mLayoutParams.height;
6292                // If the size of the view does not depend on the size of the text, try to
6293                // start the marquee immediately
6294                if (height != LayoutParams.WRAP_CONTENT && height != LayoutParams.MATCH_PARENT) {
6295                    startMarquee();
6296                } else {
6297                    // Defer the start of the marquee until we know our width (see setFrame())
6298                    mRestartMarquee = true;
6299                }
6300            }
6301        }
6302
6303        // CursorControllers need a non-null mLayout
6304        prepareCursorControllers();
6305    }
6306
6307    private Layout makeSingleLayout(int wantWidth, BoringLayout.Metrics boring, int ellipsisWidth,
6308            Layout.Alignment alignment, boolean shouldEllipsize, TruncateAt effectiveEllipsize,
6309            boolean useSaved) {
6310        Layout result = null;
6311        if (mText instanceof Spannable) {
6312            result = new DynamicLayout(mText, mTransformed, mTextPaint, wantWidth,
6313                    alignment, mTextDir, mSpacingMult,
6314                    mSpacingAdd, mIncludePad, mInput == null ? effectiveEllipsize : null,
6315                            ellipsisWidth);
6316        } else {
6317            if (boring == UNKNOWN_BORING) {
6318                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
6319                if (boring != null) {
6320                    mBoring = boring;
6321                }
6322            }
6323
6324            if (boring != null) {
6325                if (boring.width <= wantWidth &&
6326                        (effectiveEllipsize == null || boring.width <= ellipsisWidth)) {
6327                    if (useSaved && mSavedLayout != null) {
6328                        result = mSavedLayout.replaceOrMake(mTransformed, mTextPaint,
6329                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6330                                boring, mIncludePad);
6331                    } else {
6332                        result = BoringLayout.make(mTransformed, mTextPaint,
6333                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6334                                boring, mIncludePad);
6335                    }
6336
6337                    if (useSaved) {
6338                        mSavedLayout = (BoringLayout) result;
6339                    }
6340                } else if (shouldEllipsize && boring.width <= wantWidth) {
6341                    if (useSaved && mSavedLayout != null) {
6342                        result = mSavedLayout.replaceOrMake(mTransformed, mTextPaint,
6343                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6344                                boring, mIncludePad, effectiveEllipsize,
6345                                ellipsisWidth);
6346                    } else {
6347                        result = BoringLayout.make(mTransformed, mTextPaint,
6348                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6349                                boring, mIncludePad, effectiveEllipsize,
6350                                ellipsisWidth);
6351                    }
6352                } else if (shouldEllipsize) {
6353                    result = new StaticLayout(mTransformed,
6354                            0, mTransformed.length(),
6355                            mTextPaint, wantWidth, alignment, mTextDir, mSpacingMult,
6356                            mSpacingAdd, mIncludePad, effectiveEllipsize,
6357                            ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6358                } else {
6359                    result = new StaticLayout(mTransformed, mTextPaint,
6360                            wantWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6361                            mIncludePad);
6362                }
6363            } else if (shouldEllipsize) {
6364                result = new StaticLayout(mTransformed,
6365                        0, mTransformed.length(),
6366                        mTextPaint, wantWidth, alignment, mTextDir, mSpacingMult,
6367                        mSpacingAdd, mIncludePad, effectiveEllipsize,
6368                        ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6369            } else {
6370                result = new StaticLayout(mTransformed, mTextPaint,
6371                        wantWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6372                        mIncludePad);
6373            }
6374        }
6375        return result;
6376    }
6377
6378    private boolean compressText(float width) {
6379        if (isHardwareAccelerated()) return false;
6380
6381        // Only compress the text if it hasn't been compressed by the previous pass
6382        if (width > 0.0f && mLayout != null && getLineCount() == 1 && !mUserSetTextScaleX &&
6383                mTextPaint.getTextScaleX() == 1.0f) {
6384            final float textWidth = mLayout.getLineWidth(0);
6385            final float overflow = (textWidth + 1.0f - width) / width;
6386            if (overflow > 0.0f && overflow <= Marquee.MARQUEE_DELTA_MAX) {
6387                mTextPaint.setTextScaleX(1.0f - overflow - 0.005f);
6388                post(new Runnable() {
6389                    public void run() {
6390                        requestLayout();
6391                    }
6392                });
6393                return true;
6394            }
6395        }
6396
6397        return false;
6398    }
6399
6400    private static int desired(Layout layout) {
6401        int n = layout.getLineCount();
6402        CharSequence text = layout.getText();
6403        float max = 0;
6404
6405        // if any line was wrapped, we can't use it.
6406        // but it's ok for the last line not to have a newline
6407
6408        for (int i = 0; i < n - 1; i++) {
6409            if (text.charAt(layout.getLineEnd(i) - 1) != '\n')
6410                return -1;
6411        }
6412
6413        for (int i = 0; i < n; i++) {
6414            max = Math.max(max, layout.getLineWidth(i));
6415        }
6416
6417        return (int) FloatMath.ceil(max);
6418    }
6419
6420    /**
6421     * Set whether the TextView includes extra top and bottom padding to make
6422     * room for accents that go above the normal ascent and descent.
6423     * The default is true.
6424     *
6425     * @attr ref android.R.styleable#TextView_includeFontPadding
6426     */
6427    public void setIncludeFontPadding(boolean includepad) {
6428        if (mIncludePad != includepad) {
6429            mIncludePad = includepad;
6430
6431            if (mLayout != null) {
6432                nullLayouts();
6433                requestLayout();
6434                invalidate();
6435            }
6436        }
6437    }
6438
6439    private static final BoringLayout.Metrics UNKNOWN_BORING = new BoringLayout.Metrics();
6440
6441    @Override
6442    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
6443        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
6444        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
6445        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
6446        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
6447
6448        int width;
6449        int height;
6450
6451        BoringLayout.Metrics boring = UNKNOWN_BORING;
6452        BoringLayout.Metrics hintBoring = UNKNOWN_BORING;
6453
6454        if (mTextDir == null) {
6455            resolveTextDirection();
6456        }
6457
6458        int des = -1;
6459        boolean fromexisting = false;
6460
6461        if (widthMode == MeasureSpec.EXACTLY) {
6462            // Parent has told us how big to be. So be it.
6463            width = widthSize;
6464        } else {
6465            if (mLayout != null && mEllipsize == null) {
6466                des = desired(mLayout);
6467            }
6468
6469            if (des < 0) {
6470                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
6471                if (boring != null) {
6472                    mBoring = boring;
6473                }
6474            } else {
6475                fromexisting = true;
6476            }
6477
6478            if (boring == null || boring == UNKNOWN_BORING) {
6479                if (des < 0) {
6480                    des = (int) FloatMath.ceil(Layout.getDesiredWidth(mTransformed, mTextPaint));
6481                }
6482
6483                width = des;
6484            } else {
6485                width = boring.width;
6486            }
6487
6488            final Drawables dr = mDrawables;
6489            if (dr != null) {
6490                width = Math.max(width, dr.mDrawableWidthTop);
6491                width = Math.max(width, dr.mDrawableWidthBottom);
6492            }
6493
6494            if (mHint != null) {
6495                int hintDes = -1;
6496                int hintWidth;
6497
6498                if (mHintLayout != null && mEllipsize == null) {
6499                    hintDes = desired(mHintLayout);
6500                }
6501
6502                if (hintDes < 0) {
6503                    hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mHintBoring);
6504                    if (hintBoring != null) {
6505                        mHintBoring = hintBoring;
6506                    }
6507                }
6508
6509                if (hintBoring == null || hintBoring == UNKNOWN_BORING) {
6510                    if (hintDes < 0) {
6511                        hintDes = (int) FloatMath.ceil(
6512                                Layout.getDesiredWidth(mHint, mTextPaint));
6513                    }
6514
6515                    hintWidth = hintDes;
6516                } else {
6517                    hintWidth = hintBoring.width;
6518                }
6519
6520                if (hintWidth > width) {
6521                    width = hintWidth;
6522                }
6523            }
6524
6525            width += getCompoundPaddingLeft() + getCompoundPaddingRight();
6526
6527            if (mMaxWidthMode == EMS) {
6528                width = Math.min(width, mMaxWidth * getLineHeight());
6529            } else {
6530                width = Math.min(width, mMaxWidth);
6531            }
6532
6533            if (mMinWidthMode == EMS) {
6534                width = Math.max(width, mMinWidth * getLineHeight());
6535            } else {
6536                width = Math.max(width, mMinWidth);
6537            }
6538
6539            // Check against our minimum width
6540            width = Math.max(width, getSuggestedMinimumWidth());
6541
6542            if (widthMode == MeasureSpec.AT_MOST) {
6543                width = Math.min(widthSize, width);
6544            }
6545        }
6546
6547        int want = width - getCompoundPaddingLeft() - getCompoundPaddingRight();
6548        int unpaddedWidth = want;
6549
6550        if (mHorizontallyScrolling) want = VERY_WIDE;
6551
6552        int hintWant = want;
6553        int hintWidth = (mHintLayout == null) ? hintWant : mHintLayout.getWidth();
6554
6555        if (mLayout == null) {
6556            makeNewLayout(want, hintWant, boring, hintBoring,
6557                          width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6558        } else {
6559            final boolean layoutChanged = (mLayout.getWidth() != want) ||
6560                    (hintWidth != hintWant) ||
6561                    (mLayout.getEllipsizedWidth() !=
6562                            width - getCompoundPaddingLeft() - getCompoundPaddingRight());
6563
6564            final boolean widthChanged = (mHint == null) &&
6565                    (mEllipsize == null) &&
6566                    (want > mLayout.getWidth()) &&
6567                    (mLayout instanceof BoringLayout || (fromexisting && des >= 0 && des <= want));
6568
6569            final boolean maximumChanged = (mMaxMode != mOldMaxMode) || (mMaximum != mOldMaximum);
6570
6571            if (layoutChanged || maximumChanged) {
6572                if (!maximumChanged && widthChanged) {
6573                    mLayout.increaseWidthTo(want);
6574                } else {
6575                    makeNewLayout(want, hintWant, boring, hintBoring,
6576                            width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6577                }
6578            } else {
6579                // Nothing has changed
6580            }
6581        }
6582
6583        if (heightMode == MeasureSpec.EXACTLY) {
6584            // Parent has told us how big to be. So be it.
6585            height = heightSize;
6586            mDesiredHeightAtMeasure = -1;
6587        } else {
6588            int desired = getDesiredHeight();
6589
6590            height = desired;
6591            mDesiredHeightAtMeasure = desired;
6592
6593            if (heightMode == MeasureSpec.AT_MOST) {
6594                height = Math.min(desired, heightSize);
6595            }
6596        }
6597
6598        int unpaddedHeight = height - getCompoundPaddingTop() - getCompoundPaddingBottom();
6599        if (mMaxMode == LINES && mLayout.getLineCount() > mMaximum) {
6600            unpaddedHeight = Math.min(unpaddedHeight, mLayout.getLineTop(mMaximum));
6601        }
6602
6603        /*
6604         * We didn't let makeNewLayout() register to bring the cursor into view,
6605         * so do it here if there is any possibility that it is needed.
6606         */
6607        if (mMovement != null ||
6608            mLayout.getWidth() > unpaddedWidth ||
6609            mLayout.getHeight() > unpaddedHeight) {
6610            registerForPreDraw();
6611        } else {
6612            scrollTo(0, 0);
6613        }
6614
6615        setMeasuredDimension(width, height);
6616    }
6617
6618    private int getDesiredHeight() {
6619        return Math.max(
6620                getDesiredHeight(mLayout, true),
6621                getDesiredHeight(mHintLayout, mEllipsize != null));
6622    }
6623
6624    private int getDesiredHeight(Layout layout, boolean cap) {
6625        if (layout == null) {
6626            return 0;
6627        }
6628
6629        int linecount = layout.getLineCount();
6630        int pad = getCompoundPaddingTop() + getCompoundPaddingBottom();
6631        int desired = layout.getLineTop(linecount);
6632
6633        final Drawables dr = mDrawables;
6634        if (dr != null) {
6635            desired = Math.max(desired, dr.mDrawableHeightLeft);
6636            desired = Math.max(desired, dr.mDrawableHeightRight);
6637        }
6638
6639        desired += pad;
6640
6641        if (mMaxMode == LINES) {
6642            /*
6643             * Don't cap the hint to a certain number of lines.
6644             * (Do cap it, though, if we have a maximum pixel height.)
6645             */
6646            if (cap) {
6647                if (linecount > mMaximum) {
6648                    desired = layout.getLineTop(mMaximum);
6649
6650                    if (dr != null) {
6651                        desired = Math.max(desired, dr.mDrawableHeightLeft);
6652                        desired = Math.max(desired, dr.mDrawableHeightRight);
6653                    }
6654
6655                    desired += pad;
6656                    linecount = mMaximum;
6657                }
6658            }
6659        } else {
6660            desired = Math.min(desired, mMaximum);
6661        }
6662
6663        if (mMinMode == LINES) {
6664            if (linecount < mMinimum) {
6665                desired += getLineHeight() * (mMinimum - linecount);
6666            }
6667        } else {
6668            desired = Math.max(desired, mMinimum);
6669        }
6670
6671        // Check against our minimum height
6672        desired = Math.max(desired, getSuggestedMinimumHeight());
6673
6674        return desired;
6675    }
6676
6677    /**
6678     * Check whether a change to the existing text layout requires a
6679     * new view layout.
6680     */
6681    private void checkForResize() {
6682        boolean sizeChanged = false;
6683
6684        if (mLayout != null) {
6685            // Check if our width changed
6686            if (mLayoutParams.width == LayoutParams.WRAP_CONTENT) {
6687                sizeChanged = true;
6688                invalidate();
6689            }
6690
6691            // Check if our height changed
6692            if (mLayoutParams.height == LayoutParams.WRAP_CONTENT) {
6693                int desiredHeight = getDesiredHeight();
6694
6695                if (desiredHeight != this.getHeight()) {
6696                    sizeChanged = true;
6697                }
6698            } else if (mLayoutParams.height == LayoutParams.MATCH_PARENT) {
6699                if (mDesiredHeightAtMeasure >= 0) {
6700                    int desiredHeight = getDesiredHeight();
6701
6702                    if (desiredHeight != mDesiredHeightAtMeasure) {
6703                        sizeChanged = true;
6704                    }
6705                }
6706            }
6707        }
6708
6709        if (sizeChanged) {
6710            requestLayout();
6711            // caller will have already invalidated
6712        }
6713    }
6714
6715    /**
6716     * Check whether entirely new text requires a new view layout
6717     * or merely a new text layout.
6718     */
6719    private void checkForRelayout() {
6720        // If we have a fixed width, we can just swap in a new text layout
6721        // if the text height stays the same or if the view height is fixed.
6722
6723        if ((mLayoutParams.width != LayoutParams.WRAP_CONTENT ||
6724                (mMaxWidthMode == mMinWidthMode && mMaxWidth == mMinWidth)) &&
6725                (mHint == null || mHintLayout != null) &&
6726                (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight() > 0)) {
6727            // Static width, so try making a new text layout.
6728
6729            int oldht = mLayout.getHeight();
6730            int want = mLayout.getWidth();
6731            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
6732
6733            /*
6734             * No need to bring the text into view, since the size is not
6735             * changing (unless we do the requestLayout(), in which case it
6736             * will happen at measure).
6737             */
6738            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
6739                          mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight(),
6740                          false);
6741
6742            if (mEllipsize != TextUtils.TruncateAt.MARQUEE) {
6743                // In a fixed-height view, so use our new text layout.
6744                if (mLayoutParams.height != LayoutParams.WRAP_CONTENT &&
6745                    mLayoutParams.height != LayoutParams.MATCH_PARENT) {
6746                    invalidate();
6747                    return;
6748                }
6749
6750                // Dynamic height, but height has stayed the same,
6751                // so use our new text layout.
6752                if (mLayout.getHeight() == oldht &&
6753                    (mHintLayout == null || mHintLayout.getHeight() == oldht)) {
6754                    invalidate();
6755                    return;
6756                }
6757            }
6758
6759            // We lose: the height has changed and we have a dynamic height.
6760            // Request a new view layout using our new text layout.
6761            requestLayout();
6762            invalidate();
6763        } else {
6764            // Dynamic width, so we have no choice but to request a new
6765            // view layout with a new text layout.
6766            nullLayouts();
6767            requestLayout();
6768            invalidate();
6769        }
6770    }
6771
6772    /**
6773     * Returns true if anything changed.
6774     */
6775    private boolean bringTextIntoView() {
6776        int line = 0;
6777        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6778            line = mLayout.getLineCount() - 1;
6779        }
6780
6781        Layout.Alignment a = mLayout.getParagraphAlignment(line);
6782        int dir = mLayout.getParagraphDirection(line);
6783        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6784        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6785        int ht = mLayout.getHeight();
6786
6787        int scrollx, scrolly;
6788
6789        // Convert to left, center, or right alignment.
6790        if (a == Layout.Alignment.ALIGN_NORMAL) {
6791            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_LEFT :
6792                Layout.Alignment.ALIGN_RIGHT;
6793        } else if (a == Layout.Alignment.ALIGN_OPPOSITE){
6794            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_RIGHT :
6795                Layout.Alignment.ALIGN_LEFT;
6796        }
6797
6798        if (a == Layout.Alignment.ALIGN_CENTER) {
6799            /*
6800             * Keep centered if possible, or, if it is too wide to fit,
6801             * keep leading edge in view.
6802             */
6803
6804            int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6805            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6806
6807            if (right - left < hspace) {
6808                scrollx = (right + left) / 2 - hspace / 2;
6809            } else {
6810                if (dir < 0) {
6811                    scrollx = right - hspace;
6812                } else {
6813                    scrollx = left;
6814                }
6815            }
6816        } else if (a == Layout.Alignment.ALIGN_RIGHT) {
6817            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6818            scrollx = right - hspace;
6819        } else { // a == Layout.Alignment.ALIGN_LEFT (will also be the default)
6820            scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
6821        }
6822
6823        if (ht < vspace) {
6824            scrolly = 0;
6825        } else {
6826            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6827                scrolly = ht - vspace;
6828            } else {
6829                scrolly = 0;
6830            }
6831        }
6832
6833        if (scrollx != mScrollX || scrolly != mScrollY) {
6834            scrollTo(scrollx, scrolly);
6835            return true;
6836        } else {
6837            return false;
6838        }
6839    }
6840
6841    /**
6842     * Move the point, specified by the offset, into the view if it is needed.
6843     * This has to be called after layout. Returns true if anything changed.
6844     */
6845    public boolean bringPointIntoView(int offset) {
6846        boolean changed = false;
6847
6848        if (mLayout == null) return changed;
6849
6850        int line = mLayout.getLineForOffset(offset);
6851
6852        // FIXME: Is it okay to truncate this, or should we round?
6853        final int x = (int)mLayout.getPrimaryHorizontal(offset);
6854        final int top = mLayout.getLineTop(line);
6855        final int bottom = mLayout.getLineTop(line + 1);
6856
6857        int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6858        int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6859        int ht = mLayout.getHeight();
6860
6861        int grav;
6862
6863        switch (mLayout.getParagraphAlignment(line)) {
6864            case ALIGN_LEFT:
6865                grav = 1;
6866                break;
6867            case ALIGN_RIGHT:
6868                grav = -1;
6869                break;
6870            case ALIGN_NORMAL:
6871                grav = mLayout.getParagraphDirection(line);
6872                break;
6873            case ALIGN_OPPOSITE:
6874                grav = -mLayout.getParagraphDirection(line);
6875                break;
6876            case ALIGN_CENTER:
6877            default:
6878                grav = 0;
6879                break;
6880        }
6881
6882        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6883        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6884
6885        int hslack = (bottom - top) / 2;
6886        int vslack = hslack;
6887
6888        if (vslack > vspace / 4)
6889            vslack = vspace / 4;
6890        if (hslack > hspace / 4)
6891            hslack = hspace / 4;
6892
6893        int hs = mScrollX;
6894        int vs = mScrollY;
6895
6896        if (top - vs < vslack)
6897            vs = top - vslack;
6898        if (bottom - vs > vspace - vslack)
6899            vs = bottom - (vspace - vslack);
6900        if (ht - vs < vspace)
6901            vs = ht - vspace;
6902        if (0 - vs > 0)
6903            vs = 0;
6904
6905        if (grav != 0) {
6906            if (x - hs < hslack) {
6907                hs = x - hslack;
6908            }
6909            if (x - hs > hspace - hslack) {
6910                hs = x - (hspace - hslack);
6911            }
6912        }
6913
6914        if (grav < 0) {
6915            if (left - hs > 0)
6916                hs = left;
6917            if (right - hs < hspace)
6918                hs = right - hspace;
6919        } else if (grav > 0) {
6920            if (right - hs < hspace)
6921                hs = right - hspace;
6922            if (left - hs > 0)
6923                hs = left;
6924        } else /* grav == 0 */ {
6925            if (right - left <= hspace) {
6926                /*
6927                 * If the entire text fits, center it exactly.
6928                 */
6929                hs = left - (hspace - (right - left)) / 2;
6930            } else if (x > right - hslack) {
6931                /*
6932                 * If we are near the right edge, keep the right edge
6933                 * at the edge of the view.
6934                 */
6935                hs = right - hspace;
6936            } else if (x < left + hslack) {
6937                /*
6938                 * If we are near the left edge, keep the left edge
6939                 * at the edge of the view.
6940                 */
6941                hs = left;
6942            } else if (left > hs) {
6943                /*
6944                 * Is there whitespace visible at the left?  Fix it if so.
6945                 */
6946                hs = left;
6947            } else if (right < hs + hspace) {
6948                /*
6949                 * Is there whitespace visible at the right?  Fix it if so.
6950                 */
6951                hs = right - hspace;
6952            } else {
6953                /*
6954                 * Otherwise, float as needed.
6955                 */
6956                if (x - hs < hslack) {
6957                    hs = x - hslack;
6958                }
6959                if (x - hs > hspace - hslack) {
6960                    hs = x - (hspace - hslack);
6961                }
6962            }
6963        }
6964
6965        if (hs != mScrollX || vs != mScrollY) {
6966            if (mScroller == null) {
6967                scrollTo(hs, vs);
6968            } else {
6969                long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll;
6970                int dx = hs - mScrollX;
6971                int dy = vs - mScrollY;
6972
6973                if (duration > ANIMATED_SCROLL_GAP) {
6974                    mScroller.startScroll(mScrollX, mScrollY, dx, dy);
6975                    awakenScrollBars(mScroller.getDuration());
6976                    invalidate();
6977                } else {
6978                    if (!mScroller.isFinished()) {
6979                        mScroller.abortAnimation();
6980                    }
6981
6982                    scrollBy(dx, dy);
6983                }
6984
6985                mLastScroll = AnimationUtils.currentAnimationTimeMillis();
6986            }
6987
6988            changed = true;
6989        }
6990
6991        if (isFocused()) {
6992            // This offsets because getInterestingRect() is in terms of viewport coordinates, but
6993            // requestRectangleOnScreen() is in terms of content coordinates.
6994
6995            if (mTempRect == null) mTempRect = new Rect();
6996            // The offsets here are to ensure the rectangle we are using is
6997            // within our view bounds, in case the cursor is on the far left
6998            // or right.  If it isn't withing the bounds, then this request
6999            // will be ignored.
7000            mTempRect.set(x - 2, top, x + 2, bottom);
7001            getInterestingRect(mTempRect, line);
7002            mTempRect.offset(mScrollX, mScrollY);
7003
7004            if (requestRectangleOnScreen(mTempRect)) {
7005                changed = true;
7006            }
7007        }
7008
7009        return changed;
7010    }
7011
7012    /**
7013     * Move the cursor, if needed, so that it is at an offset that is visible
7014     * to the user.  This will not move the cursor if it represents more than
7015     * one character (a selection range).  This will only work if the
7016     * TextView contains spannable text; otherwise it will do nothing.
7017     *
7018     * @return True if the cursor was actually moved, false otherwise.
7019     */
7020    public boolean moveCursorToVisibleOffset() {
7021        if (!(mText instanceof Spannable)) {
7022            return false;
7023        }
7024        int start = getSelectionStart();
7025        int end = getSelectionEnd();
7026        if (start != end) {
7027            return false;
7028        }
7029
7030        // First: make sure the line is visible on screen:
7031
7032        int line = mLayout.getLineForOffset(start);
7033
7034        final int top = mLayout.getLineTop(line);
7035        final int bottom = mLayout.getLineTop(line + 1);
7036        final int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
7037        int vslack = (bottom - top) / 2;
7038        if (vslack > vspace / 4)
7039            vslack = vspace / 4;
7040        final int vs = mScrollY;
7041
7042        if (top < (vs+vslack)) {
7043            line = mLayout.getLineForVertical(vs+vslack+(bottom-top));
7044        } else if (bottom > (vspace+vs-vslack)) {
7045            line = mLayout.getLineForVertical(vspace+vs-vslack-(bottom-top));
7046        }
7047
7048        // Next: make sure the character is visible on screen:
7049
7050        final int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
7051        final int hs = mScrollX;
7052        final int leftChar = mLayout.getOffsetForHorizontal(line, hs);
7053        final int rightChar = mLayout.getOffsetForHorizontal(line, hspace+hs);
7054
7055        // line might contain bidirectional text
7056        final int lowChar = leftChar < rightChar ? leftChar : rightChar;
7057        final int highChar = leftChar > rightChar ? leftChar : rightChar;
7058
7059        int newStart = start;
7060        if (newStart < lowChar) {
7061            newStart = lowChar;
7062        } else if (newStart > highChar) {
7063            newStart = highChar;
7064        }
7065
7066        if (newStart != start) {
7067            Selection.setSelection((Spannable)mText, newStart);
7068            return true;
7069        }
7070
7071        return false;
7072    }
7073
7074    @Override
7075    public void computeScroll() {
7076        if (mScroller != null) {
7077            if (mScroller.computeScrollOffset()) {
7078                mScrollX = mScroller.getCurrX();
7079                mScrollY = mScroller.getCurrY();
7080                invalidateParentCaches();
7081                postInvalidate();  // So we draw again
7082            }
7083        }
7084    }
7085
7086    private void getInterestingRect(Rect r, int line) {
7087        convertFromViewportToContentCoordinates(r);
7088
7089        // Rectangle can can be expanded on first and last line to take
7090        // padding into account.
7091        // TODO Take left/right padding into account too?
7092        if (line == 0) r.top -= getExtendedPaddingTop();
7093        if (line == mLayout.getLineCount() - 1) r.bottom += getExtendedPaddingBottom();
7094    }
7095
7096    private void convertFromViewportToContentCoordinates(Rect r) {
7097        final int horizontalOffset = viewportToContentHorizontalOffset();
7098        r.left += horizontalOffset;
7099        r.right += horizontalOffset;
7100
7101        final int verticalOffset = viewportToContentVerticalOffset();
7102        r.top += verticalOffset;
7103        r.bottom += verticalOffset;
7104    }
7105
7106    private int viewportToContentHorizontalOffset() {
7107        return getCompoundPaddingLeft() - mScrollX;
7108    }
7109
7110    private int viewportToContentVerticalOffset() {
7111        int offset = getExtendedPaddingTop() - mScrollY;
7112        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
7113            offset += getVerticalOffset(false);
7114        }
7115        return offset;
7116    }
7117
7118    @Override
7119    public void debug(int depth) {
7120        super.debug(depth);
7121
7122        String output = debugIndent(depth);
7123        output += "frame={" + mLeft + ", " + mTop + ", " + mRight
7124                + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY
7125                + "} ";
7126
7127        if (mText != null) {
7128
7129            output += "mText=\"" + mText + "\" ";
7130            if (mLayout != null) {
7131                output += "mLayout width=" + mLayout.getWidth()
7132                        + " height=" + mLayout.getHeight();
7133            }
7134        } else {
7135            output += "mText=NULL";
7136        }
7137        Log.d(VIEW_LOG_TAG, output);
7138    }
7139
7140    /**
7141     * Convenience for {@link Selection#getSelectionStart}.
7142     */
7143    @ViewDebug.ExportedProperty(category = "text")
7144    public int getSelectionStart() {
7145        return Selection.getSelectionStart(getText());
7146    }
7147
7148    /**
7149     * Convenience for {@link Selection#getSelectionEnd}.
7150     */
7151    @ViewDebug.ExportedProperty(category = "text")
7152    public int getSelectionEnd() {
7153        return Selection.getSelectionEnd(getText());
7154    }
7155
7156    /**
7157     * Return true iff there is a selection inside this text view.
7158     */
7159    public boolean hasSelection() {
7160        final int selectionStart = getSelectionStart();
7161        final int selectionEnd = getSelectionEnd();
7162
7163        return selectionStart >= 0 && selectionStart != selectionEnd;
7164    }
7165
7166    /**
7167     * Sets the properties of this field (lines, horizontally scrolling,
7168     * transformation method) to be for a single-line input.
7169     *
7170     * @attr ref android.R.styleable#TextView_singleLine
7171     */
7172    public void setSingleLine() {
7173        setSingleLine(true);
7174    }
7175
7176    /**
7177     * Sets the properties of this field to transform input to ALL CAPS
7178     * display. This may use a "small caps" formatting if available.
7179     * This setting will be ignored if this field is editable or selectable.
7180     *
7181     * This call replaces the current transformation method. Disabling this
7182     * will not necessarily restore the previous behavior from before this
7183     * was enabled.
7184     *
7185     * @see #setTransformationMethod(TransformationMethod)
7186     * @attr ref android.R.styleable#TextView_textAllCaps
7187     */
7188    public void setAllCaps(boolean allCaps) {
7189        if (allCaps) {
7190            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
7191        } else {
7192            setTransformationMethod(null);
7193        }
7194    }
7195
7196    /**
7197     * If true, sets the properties of this field (number of lines, horizontally scrolling,
7198     * transformation method) to be for a single-line input; if false, restores these to the default
7199     * conditions.
7200     *
7201     * Note that the default conditions are not necessarily those that were in effect prior this
7202     * method, and you may want to reset these properties to your custom values.
7203     *
7204     * @attr ref android.R.styleable#TextView_singleLine
7205     */
7206    @android.view.RemotableViewMethod
7207    public void setSingleLine(boolean singleLine) {
7208        // Could be used, but may break backward compatibility.
7209        // if (mSingleLine == singleLine) return;
7210        setInputTypeSingleLine(singleLine);
7211        applySingleLine(singleLine, true, true);
7212    }
7213
7214    /**
7215     * Adds or remove the EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE on the mInputType.
7216     * @param singleLine
7217     */
7218    private void setInputTypeSingleLine(boolean singleLine) {
7219        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
7220            if (singleLine) {
7221                mInputType &= ~EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
7222            } else {
7223                mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
7224            }
7225        }
7226    }
7227
7228    private void applySingleLine(boolean singleLine, boolean applyTransformation,
7229            boolean changeMaxLines) {
7230        mSingleLine = singleLine;
7231        if (singleLine) {
7232            setLines(1);
7233            setHorizontallyScrolling(true);
7234            if (applyTransformation) {
7235                setTransformationMethod(SingleLineTransformationMethod.getInstance());
7236            }
7237        } else {
7238            if (changeMaxLines) {
7239                setMaxLines(Integer.MAX_VALUE);
7240            }
7241            setHorizontallyScrolling(false);
7242            if (applyTransformation) {
7243                setTransformationMethod(null);
7244            }
7245        }
7246    }
7247
7248    /**
7249     * Causes words in the text that are longer than the view is wide
7250     * to be ellipsized instead of broken in the middle.  You may also
7251     * want to {@link #setSingleLine} or {@link #setHorizontallyScrolling}
7252     * to constrain the text to a single line.  Use <code>null</code>
7253     * to turn off ellipsizing.
7254     *
7255     * If {@link #setMaxLines} has been used to set two or more lines,
7256     * {@link android.text.TextUtils.TruncateAt#END} and
7257     * {@link android.text.TextUtils.TruncateAt#MARQUEE}* are only supported
7258     * (other ellipsizing types will not do anything).
7259     *
7260     * @attr ref android.R.styleable#TextView_ellipsize
7261     */
7262    public void setEllipsize(TextUtils.TruncateAt where) {
7263        // TruncateAt is an enum. != comparison is ok between these singleton objects.
7264        if (mEllipsize != where) {
7265            mEllipsize = where;
7266
7267            if (mLayout != null) {
7268                nullLayouts();
7269                requestLayout();
7270                invalidate();
7271            }
7272        }
7273    }
7274
7275    /**
7276     * Sets how many times to repeat the marquee animation. Only applied if the
7277     * TextView has marquee enabled. Set to -1 to repeat indefinitely.
7278     *
7279     * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
7280     */
7281    public void setMarqueeRepeatLimit(int marqueeLimit) {
7282        mMarqueeRepeatLimit = marqueeLimit;
7283    }
7284
7285    /**
7286     * Returns where, if anywhere, words that are longer than the view
7287     * is wide should be ellipsized.
7288     */
7289    @ViewDebug.ExportedProperty
7290    public TextUtils.TruncateAt getEllipsize() {
7291        return mEllipsize;
7292    }
7293
7294    /**
7295     * Set the TextView so that when it takes focus, all the text is
7296     * selected.
7297     *
7298     * @attr ref android.R.styleable#TextView_selectAllOnFocus
7299     */
7300    @android.view.RemotableViewMethod
7301    public void setSelectAllOnFocus(boolean selectAllOnFocus) {
7302        mSelectAllOnFocus = selectAllOnFocus;
7303
7304        if (selectAllOnFocus && !(mText instanceof Spannable)) {
7305            setText(mText, BufferType.SPANNABLE);
7306        }
7307    }
7308
7309    /**
7310     * Set whether the cursor is visible.  The default is true.
7311     *
7312     * @attr ref android.R.styleable#TextView_cursorVisible
7313     */
7314    @android.view.RemotableViewMethod
7315    public void setCursorVisible(boolean visible) {
7316        if (mCursorVisible != visible) {
7317            mCursorVisible = visible;
7318            invalidate();
7319
7320            makeBlink();
7321
7322            // InsertionPointCursorController depends on mCursorVisible
7323            prepareCursorControllers();
7324        }
7325    }
7326
7327    private boolean isCursorVisible() {
7328        return mCursorVisible && isTextEditable();
7329    }
7330
7331    private boolean canMarquee() {
7332        int width = (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight());
7333        return width > 0 && (mLayout.getLineWidth(0) > width ||
7334                (mMarqueeFadeMode != MARQUEE_FADE_NORMAL && mSavedMarqueeModeLayout != null &&
7335                        mSavedMarqueeModeLayout.getLineWidth(0) > width));
7336    }
7337
7338    private void startMarquee() {
7339        // Do not ellipsize EditText
7340        if (mInput != null) return;
7341
7342        if (compressText(getWidth() - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
7343            return;
7344        }
7345
7346        if ((mMarquee == null || mMarquee.isStopped()) && (isFocused() || isSelected()) &&
7347                getLineCount() == 1 && canMarquee()) {
7348
7349            if (mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
7350                mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_FADE;
7351                final Layout tmp = mLayout;
7352                mLayout = mSavedMarqueeModeLayout;
7353                mSavedMarqueeModeLayout = tmp;
7354                setHorizontalFadingEdgeEnabled(true);
7355                requestLayout();
7356                invalidate();
7357            }
7358
7359            if (mMarquee == null) mMarquee = new Marquee(this);
7360            mMarquee.start(mMarqueeRepeatLimit);
7361        }
7362    }
7363
7364    private void stopMarquee() {
7365        if (mMarquee != null && !mMarquee.isStopped()) {
7366            mMarquee.stop();
7367        }
7368
7369        if (mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_FADE) {
7370            mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
7371            final Layout tmp = mSavedMarqueeModeLayout;
7372            mSavedMarqueeModeLayout = mLayout;
7373            mLayout = tmp;
7374            setHorizontalFadingEdgeEnabled(false);
7375            requestLayout();
7376            invalidate();
7377        }
7378    }
7379
7380    private void startStopMarquee(boolean start) {
7381        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7382            if (start) {
7383                startMarquee();
7384            } else {
7385                stopMarquee();
7386            }
7387        }
7388    }
7389
7390    private static final class Marquee extends Handler {
7391        // TODO: Add an option to configure this
7392        private static final float MARQUEE_DELTA_MAX = 0.07f;
7393        private static final int MARQUEE_DELAY = 1200;
7394        private static final int MARQUEE_RESTART_DELAY = 1200;
7395        private static final int MARQUEE_RESOLUTION = 1000 / 30;
7396        private static final int MARQUEE_PIXELS_PER_SECOND = 30;
7397
7398        private static final byte MARQUEE_STOPPED = 0x0;
7399        private static final byte MARQUEE_STARTING = 0x1;
7400        private static final byte MARQUEE_RUNNING = 0x2;
7401
7402        private static final int MESSAGE_START = 0x1;
7403        private static final int MESSAGE_TICK = 0x2;
7404        private static final int MESSAGE_RESTART = 0x3;
7405
7406        private final WeakReference<TextView> mView;
7407
7408        private byte mStatus = MARQUEE_STOPPED;
7409        private final float mScrollUnit;
7410        private float mMaxScroll;
7411        float mMaxFadeScroll;
7412        private float mGhostStart;
7413        private float mGhostOffset;
7414        private float mFadeStop;
7415        private int mRepeatLimit;
7416
7417        float mScroll;
7418
7419        Marquee(TextView v) {
7420            final float density = v.getContext().getResources().getDisplayMetrics().density;
7421            mScrollUnit = (MARQUEE_PIXELS_PER_SECOND * density) / MARQUEE_RESOLUTION;
7422            mView = new WeakReference<TextView>(v);
7423        }
7424
7425        @Override
7426        public void handleMessage(Message msg) {
7427            switch (msg.what) {
7428                case MESSAGE_START:
7429                    mStatus = MARQUEE_RUNNING;
7430                    tick();
7431                    break;
7432                case MESSAGE_TICK:
7433                    tick();
7434                    break;
7435                case MESSAGE_RESTART:
7436                    if (mStatus == MARQUEE_RUNNING) {
7437                        if (mRepeatLimit >= 0) {
7438                            mRepeatLimit--;
7439                        }
7440                        start(mRepeatLimit);
7441                    }
7442                    break;
7443            }
7444        }
7445
7446        void tick() {
7447            if (mStatus != MARQUEE_RUNNING) {
7448                return;
7449            }
7450
7451            removeMessages(MESSAGE_TICK);
7452
7453            final TextView textView = mView.get();
7454            if (textView != null && (textView.isFocused() || textView.isSelected())) {
7455                mScroll += mScrollUnit;
7456                if (mScroll > mMaxScroll) {
7457                    mScroll = mMaxScroll;
7458                    sendEmptyMessageDelayed(MESSAGE_RESTART, MARQUEE_RESTART_DELAY);
7459                } else {
7460                    sendEmptyMessageDelayed(MESSAGE_TICK, MARQUEE_RESOLUTION);
7461                }
7462                textView.invalidate();
7463            }
7464        }
7465
7466        void stop() {
7467            mStatus = MARQUEE_STOPPED;
7468            removeMessages(MESSAGE_START);
7469            removeMessages(MESSAGE_RESTART);
7470            removeMessages(MESSAGE_TICK);
7471            resetScroll();
7472        }
7473
7474        private void resetScroll() {
7475            mScroll = 0.0f;
7476            final TextView textView = mView.get();
7477            if (textView != null) textView.invalidate();
7478        }
7479
7480        void start(int repeatLimit) {
7481            if (repeatLimit == 0) {
7482                stop();
7483                return;
7484            }
7485            mRepeatLimit = repeatLimit;
7486            final TextView textView = mView.get();
7487            if (textView != null && textView.mLayout != null) {
7488                mStatus = MARQUEE_STARTING;
7489                mScroll = 0.0f;
7490                final int textWidth = textView.getWidth() - textView.getCompoundPaddingLeft() -
7491                        textView.getCompoundPaddingRight();
7492                final float lineWidth = textView.mLayout.getLineWidth(0);
7493                final float gap = textWidth / 3.0f;
7494                mGhostStart = lineWidth - textWidth + gap;
7495                mMaxScroll = mGhostStart + textWidth;
7496                mGhostOffset = lineWidth + gap;
7497                mFadeStop = lineWidth + textWidth / 6.0f;
7498                mMaxFadeScroll = mGhostStart + lineWidth + lineWidth;
7499
7500                textView.invalidate();
7501                sendEmptyMessageDelayed(MESSAGE_START, MARQUEE_DELAY);
7502            }
7503        }
7504
7505        float getGhostOffset() {
7506            return mGhostOffset;
7507        }
7508
7509        boolean shouldDrawLeftFade() {
7510            return mScroll <= mFadeStop;
7511        }
7512
7513        boolean shouldDrawGhost() {
7514            return mStatus == MARQUEE_RUNNING && mScroll > mGhostStart;
7515        }
7516
7517        boolean isRunning() {
7518            return mStatus == MARQUEE_RUNNING;
7519        }
7520
7521        boolean isStopped() {
7522            return mStatus == MARQUEE_STOPPED;
7523        }
7524    }
7525
7526    /**
7527     * This method is called when the text is changed, in case any subclasses
7528     * would like to know.
7529     *
7530     * Within <code>text</code>, the <code>lengthAfter</code> characters
7531     * beginning at <code>start</code> have just replaced old text that had
7532     * length <code>lengthBefore</code>. It is an error to attempt to make
7533     * changes to <code>text</code> from this callback.
7534     *
7535     * @param text The text the TextView is displaying
7536     * @param start The offset of the start of the range of the text that was
7537     * modified
7538     * @param lengthBefore The length of the former text that has been replaced
7539     * @param lengthAfter The length of the replacement modified text
7540     */
7541    protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
7542        // intentionally empty, template pattern method can be overridden by subclasses
7543    }
7544
7545    /**
7546     * This method is called when the selection has changed, in case any
7547     * subclasses would like to know.
7548     *
7549     * @param selStart The new selection start location.
7550     * @param selEnd The new selection end location.
7551     */
7552    protected void onSelectionChanged(int selStart, int selEnd) {
7553        sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED);
7554    }
7555
7556    /**
7557     * Adds a TextWatcher to the list of those whose methods are called
7558     * whenever this TextView's text changes.
7559     * <p>
7560     * In 1.0, the {@link TextWatcher#afterTextChanged} method was erroneously
7561     * not called after {@link #setText} calls.  Now, doing {@link #setText}
7562     * if there are any text changed listeners forces the buffer type to
7563     * Editable if it would not otherwise be and does call this method.
7564     */
7565    public void addTextChangedListener(TextWatcher watcher) {
7566        if (mListeners == null) {
7567            mListeners = new ArrayList<TextWatcher>();
7568        }
7569
7570        mListeners.add(watcher);
7571    }
7572
7573    /**
7574     * Removes the specified TextWatcher from the list of those whose
7575     * methods are called
7576     * whenever this TextView's text changes.
7577     */
7578    public void removeTextChangedListener(TextWatcher watcher) {
7579        if (mListeners != null) {
7580            int i = mListeners.indexOf(watcher);
7581
7582            if (i >= 0) {
7583                mListeners.remove(i);
7584            }
7585        }
7586    }
7587
7588    private void sendBeforeTextChanged(CharSequence text, int start, int before, int after) {
7589        if (mListeners != null) {
7590            final ArrayList<TextWatcher> list = mListeners;
7591            final int count = list.size();
7592            for (int i = 0; i < count; i++) {
7593                list.get(i).beforeTextChanged(text, start, before, after);
7594            }
7595        }
7596
7597        // The spans that are inside or intersect the modified region no longer make sense
7598        removeIntersectingSpans(start, start + before, SpellCheckSpan.class);
7599        removeIntersectingSpans(start, start + before, SuggestionSpan.class);
7600    }
7601
7602    // Removes all spans that are inside or actually overlap the start..end range
7603    private <T> void removeIntersectingSpans(int start, int end, Class<T> type) {
7604        if (!(mText instanceof Editable)) return;
7605        Editable text = (Editable) mText;
7606
7607        T[] spans = text.getSpans(start, end, type);
7608        final int length = spans.length;
7609        for (int i = 0; i < length; i++) {
7610            final int s = text.getSpanStart(spans[i]);
7611            final int e = text.getSpanEnd(spans[i]);
7612            // Spans that are adjacent to the edited region will be handled in
7613            // updateSpellCheckSpans. Result depends on what will be added (space or text)
7614            if (e == start || s == end) break;
7615            text.removeSpan(spans[i]);
7616        }
7617    }
7618
7619    /**
7620     * Not private so it can be called from an inner class without going
7621     * through a thunk.
7622     */
7623    void sendOnTextChanged(CharSequence text, int start, int before, int after) {
7624        if (mListeners != null) {
7625            final ArrayList<TextWatcher> list = mListeners;
7626            final int count = list.size();
7627            for (int i = 0; i < count; i++) {
7628                list.get(i).onTextChanged(text, start, before, after);
7629            }
7630        }
7631
7632        updateSpellCheckSpans(start, start + after, false);
7633
7634        // Hide the controllers as soon as text is modified (typing, procedural...)
7635        // We do not hide the span controllers, since they can be added when a new text is
7636        // inserted into the text view (voice IME).
7637        hideCursorControllers();
7638    }
7639
7640    /**
7641     * Not private so it can be called from an inner class without going
7642     * through a thunk.
7643     */
7644    void sendAfterTextChanged(Editable text) {
7645        if (mListeners != null) {
7646            final ArrayList<TextWatcher> list = mListeners;
7647            final int count = list.size();
7648            for (int i = 0; i < count; i++) {
7649                list.get(i).afterTextChanged(text);
7650            }
7651        }
7652    }
7653
7654    /**
7655     * Not private so it can be called from an inner class without going
7656     * through a thunk.
7657     */
7658    void handleTextChanged(CharSequence buffer, int start, int before, int after) {
7659        final InputMethodState ims = mInputMethodState;
7660        if (ims == null || ims.mBatchEditNesting == 0) {
7661            updateAfterEdit();
7662        }
7663        if (ims != null) {
7664            ims.mContentChanged = true;
7665            if (ims.mChangedStart < 0) {
7666                ims.mChangedStart = start;
7667                ims.mChangedEnd = start+before;
7668            } else {
7669                ims.mChangedStart = Math.min(ims.mChangedStart, start);
7670                ims.mChangedEnd = Math.max(ims.mChangedEnd, start + before - ims.mChangedDelta);
7671            }
7672            ims.mChangedDelta += after-before;
7673        }
7674
7675        sendOnTextChanged(buffer, start, before, after);
7676        onTextChanged(buffer, start, before, after);
7677    }
7678
7679    /**
7680     * Not private so it can be called from an inner class without going
7681     * through a thunk.
7682     */
7683    void spanChange(Spanned buf, Object what, int oldStart, int newStart, int oldEnd, int newEnd) {
7684        // XXX Make the start and end move together if this ends up
7685        // spending too much time invalidating.
7686
7687        boolean selChanged = false;
7688        int newSelStart=-1, newSelEnd=-1;
7689
7690        final InputMethodState ims = mInputMethodState;
7691
7692        if (what == Selection.SELECTION_END) {
7693            mHighlightPathBogus = true;
7694            selChanged = true;
7695            newSelEnd = newStart;
7696
7697            if (!isFocused()) {
7698                mSelectionMoved = true;
7699            }
7700
7701            if (oldStart >= 0 || newStart >= 0) {
7702                invalidateCursor(Selection.getSelectionStart(buf), oldStart, newStart);
7703                registerForPreDraw();
7704                makeBlink();
7705            }
7706        }
7707
7708        if (what == Selection.SELECTION_START) {
7709            mHighlightPathBogus = true;
7710            selChanged = true;
7711            newSelStart = newStart;
7712
7713            if (!isFocused()) {
7714                mSelectionMoved = true;
7715            }
7716
7717            if (oldStart >= 0 || newStart >= 0) {
7718                int end = Selection.getSelectionEnd(buf);
7719                invalidateCursor(end, oldStart, newStart);
7720            }
7721        }
7722
7723        if (selChanged) {
7724            if ((buf.getSpanFlags(what)&Spanned.SPAN_INTERMEDIATE) == 0) {
7725                if (newSelStart < 0) {
7726                    newSelStart = Selection.getSelectionStart(buf);
7727                }
7728                if (newSelEnd < 0) {
7729                    newSelEnd = Selection.getSelectionEnd(buf);
7730                }
7731                onSelectionChanged(newSelStart, newSelEnd);
7732            }
7733        }
7734
7735        if (what instanceof UpdateAppearance || what instanceof ParagraphStyle) {
7736            if (ims == null || ims.mBatchEditNesting == 0) {
7737                invalidate();
7738                mHighlightPathBogus = true;
7739                checkForResize();
7740            } else {
7741                ims.mContentChanged = true;
7742            }
7743        }
7744
7745        if (MetaKeyKeyListener.isMetaTracker(buf, what)) {
7746            mHighlightPathBogus = true;
7747            if (ims != null && MetaKeyKeyListener.isSelectingMetaTracker(buf, what)) {
7748                ims.mSelectionModeChanged = true;
7749            }
7750
7751            if (Selection.getSelectionStart(buf) >= 0) {
7752                if (ims == null || ims.mBatchEditNesting == 0) {
7753                    invalidateCursor();
7754                } else {
7755                    ims.mCursorChanged = true;
7756                }
7757            }
7758        }
7759
7760        if (what instanceof ParcelableSpan) {
7761            // If this is a span that can be sent to a remote process,
7762            // the current extract editor would be interested in it.
7763            if (ims != null && ims.mExtracting != null) {
7764                if (ims.mBatchEditNesting != 0) {
7765                    if (oldStart >= 0) {
7766                        if (ims.mChangedStart > oldStart) {
7767                            ims.mChangedStart = oldStart;
7768                        }
7769                        if (ims.mChangedStart > oldEnd) {
7770                            ims.mChangedStart = oldEnd;
7771                        }
7772                    }
7773                    if (newStart >= 0) {
7774                        if (ims.mChangedStart > newStart) {
7775                            ims.mChangedStart = newStart;
7776                        }
7777                        if (ims.mChangedStart > newEnd) {
7778                            ims.mChangedStart = newEnd;
7779                        }
7780                    }
7781                } else {
7782                    if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Span change outside of batch: "
7783                            + oldStart + "-" + oldEnd + ","
7784                            + newStart + "-" + newEnd + what);
7785                    ims.mContentChanged = true;
7786                }
7787            }
7788        }
7789
7790        if (mSpellChecker != null && newStart < 0 && what instanceof SpellCheckSpan) {
7791            mSpellChecker.removeSpellCheckSpan((SpellCheckSpan) what);
7792        }
7793    }
7794
7795    /**
7796     * Create new SpellCheckSpans on the modified region.
7797     */
7798    private void updateSpellCheckSpans(int start, int end, boolean createSpellChecker) {
7799        if (isTextEditable() && isSuggestionsEnabled()) {
7800            if (mSpellChecker == null && createSpellChecker) {
7801                mSpellChecker = new SpellChecker(this);
7802            }
7803            if (mSpellChecker != null) {
7804                mSpellChecker.spellCheck(start, end);
7805            }
7806        }
7807    }
7808
7809    /**
7810     * Controls the {@link EasyEditSpan} monitoring when it is added, and when the related
7811     * pop-up should be displayed.
7812     */
7813    private class EasyEditSpanController {
7814
7815        private static final int DISPLAY_TIMEOUT_MS = 3000; // 3 secs
7816
7817        private EasyEditPopupWindow mPopupWindow;
7818
7819        private EasyEditSpan mEasyEditSpan;
7820
7821        private Runnable mHidePopup;
7822
7823        private void hide() {
7824            if (mPopupWindow != null) {
7825                mPopupWindow.hide();
7826                TextView.this.removeCallbacks(mHidePopup);
7827            }
7828            removeSpans(mText);
7829            mEasyEditSpan = null;
7830        }
7831
7832        /**
7833         * Monitors the changes in the text.
7834         *
7835         * <p>{@link ChangeWatcher#onSpanAdded(Spannable, Object, int, int)} cannot be used,
7836         * as the notifications are not sent when a spannable (with spans) is inserted.
7837         */
7838        public void onTextChange(CharSequence buffer) {
7839            adjustSpans(mText);
7840
7841            if (getWindowVisibility() != View.VISIBLE) {
7842                // The window is not visible yet, ignore the text change.
7843                return;
7844            }
7845
7846            if (mLayout == null) {
7847                // The view has not been layout yet, ignore the text change
7848                return;
7849            }
7850
7851            InputMethodManager imm = InputMethodManager.peekInstance();
7852            if (!(TextView.this instanceof ExtractEditText)
7853                    && imm != null && imm.isFullscreenMode()) {
7854                // The input is in extract mode. We do not have to handle the easy edit in the
7855                // original TextView, as the ExtractEditText will do
7856                return;
7857            }
7858
7859            // Remove the current easy edit span, as the text changed, and remove the pop-up
7860            // (if any)
7861            if (mEasyEditSpan != null) {
7862                if (mText instanceof Spannable) {
7863                    ((Spannable) mText).removeSpan(mEasyEditSpan);
7864                }
7865                mEasyEditSpan = null;
7866            }
7867            if (mPopupWindow != null && mPopupWindow.isShowing()) {
7868                mPopupWindow.hide();
7869            }
7870
7871            // Display the new easy edit span (if any).
7872            if (buffer instanceof Spanned) {
7873                mEasyEditSpan = getSpan((Spanned) buffer);
7874                if (mEasyEditSpan != null) {
7875                    if (mPopupWindow == null) {
7876                        mPopupWindow = new EasyEditPopupWindow();
7877                        mHidePopup = new Runnable() {
7878                            @Override
7879                            public void run() {
7880                                hide();
7881                            }
7882                        };
7883                    }
7884                    mPopupWindow.show(mEasyEditSpan);
7885                    TextView.this.removeCallbacks(mHidePopup);
7886                    TextView.this.postDelayed(mHidePopup, DISPLAY_TIMEOUT_MS);
7887                }
7888            }
7889        }
7890
7891        /**
7892         * Adjusts the spans by removing all of them except the last one.
7893         */
7894        private void adjustSpans(CharSequence buffer) {
7895            // This method enforces that only one easy edit span is attached to the text.
7896            // A better way to enforce this would be to listen for onSpanAdded, but this method
7897            // cannot be used in this scenario as no notification is triggered when a text with
7898            // spans is inserted into a text.
7899            if (buffer instanceof Spannable) {
7900                Spannable spannable = (Spannable) buffer;
7901                EasyEditSpan[] spans = spannable.getSpans(0, spannable.length(),
7902                        EasyEditSpan.class);
7903                for (int i = 0; i < spans.length - 1; i++) {
7904                    spannable.removeSpan(spans[i]);
7905                }
7906            }
7907        }
7908
7909        /**
7910         * Removes all the {@link EasyEditSpan} currently attached.
7911         */
7912        private void removeSpans(CharSequence buffer) {
7913            if (buffer instanceof Spannable) {
7914                Spannable spannable = (Spannable) buffer;
7915                EasyEditSpan[] spans = spannable.getSpans(0, spannable.length(),
7916                        EasyEditSpan.class);
7917                for (int i = 0; i < spans.length; i++) {
7918                    spannable.removeSpan(spans[i]);
7919                }
7920            }
7921        }
7922
7923        private EasyEditSpan getSpan(Spanned spanned) {
7924            EasyEditSpan[] easyEditSpans = spanned.getSpans(0, spanned.length(),
7925                    EasyEditSpan.class);
7926            if (easyEditSpans.length == 0) {
7927                return null;
7928            } else {
7929                return easyEditSpans[0];
7930            }
7931        }
7932    }
7933
7934    /**
7935     * Displays the actions associated to an {@link EasyEditSpan}. The pop-up is controlled
7936     * by {@link EasyEditSpanController}.
7937     */
7938    private class EasyEditPopupWindow extends PinnedPopupWindow
7939            implements OnClickListener {
7940        private static final int POPUP_TEXT_LAYOUT =
7941                com.android.internal.R.layout.text_edit_action_popup_text;
7942        private TextView mDeleteTextView;
7943        private EasyEditSpan mEasyEditSpan;
7944
7945        @Override
7946        protected void createPopupWindow() {
7947            mPopupWindow = new PopupWindow(TextView.this.mContext, null,
7948                    com.android.internal.R.attr.textSelectHandleWindowStyle);
7949            mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
7950            mPopupWindow.setClippingEnabled(true);
7951        }
7952
7953        @Override
7954        protected void initContentView() {
7955            LinearLayout linearLayout = new LinearLayout(TextView.this.getContext());
7956            linearLayout.setOrientation(LinearLayout.HORIZONTAL);
7957            mContentView = linearLayout;
7958            mContentView.setBackgroundResource(
7959                    com.android.internal.R.drawable.text_edit_side_paste_window);
7960
7961            LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
7962                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
7963
7964            LayoutParams wrapContent = new LayoutParams(
7965                    ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
7966
7967            mDeleteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
7968            mDeleteTextView.setLayoutParams(wrapContent);
7969            mDeleteTextView.setText(com.android.internal.R.string.delete);
7970            mDeleteTextView.setOnClickListener(this);
7971            mContentView.addView(mDeleteTextView);
7972        }
7973
7974        public void show(EasyEditSpan easyEditSpan) {
7975            mEasyEditSpan = easyEditSpan;
7976            super.show();
7977        }
7978
7979        @Override
7980        public void onClick(View view) {
7981            if (view == mDeleteTextView) {
7982                Editable editable = (Editable) mText;
7983                int start = editable.getSpanStart(mEasyEditSpan);
7984                int end = editable.getSpanEnd(mEasyEditSpan);
7985                if (start >= 0 && end >= 0) {
7986                    deleteText_internal(start, end);
7987                }
7988            }
7989        }
7990
7991        @Override
7992        protected int getTextOffset() {
7993            // Place the pop-up at the end of the span
7994            Editable editable = (Editable) mText;
7995            return editable.getSpanEnd(mEasyEditSpan);
7996        }
7997
7998        @Override
7999        protected int getVerticalLocalPosition(int line) {
8000            return mLayout.getLineBottom(line);
8001        }
8002
8003        @Override
8004        protected int clipVertically(int positionY) {
8005            // As we display the pop-up below the span, no vertical clipping is required.
8006            return positionY;
8007        }
8008    }
8009
8010    private class ChangeWatcher implements TextWatcher, SpanWatcher {
8011
8012        private CharSequence mBeforeText;
8013
8014        private EasyEditSpanController mEasyEditSpanController;
8015
8016        private ChangeWatcher() {
8017            mEasyEditSpanController = new EasyEditSpanController();
8018        }
8019
8020        public void beforeTextChanged(CharSequence buffer, int start,
8021                                      int before, int after) {
8022            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "beforeTextChanged start=" + start
8023                    + " before=" + before + " after=" + after + ": " + buffer);
8024
8025            if (AccessibilityManager.getInstance(mContext).isEnabled()
8026                    && !isPasswordInputType(mInputType)
8027                    && !hasPasswordTransformationMethod()) {
8028                mBeforeText = buffer.toString();
8029            }
8030
8031            TextView.this.sendBeforeTextChanged(buffer, start, before, after);
8032        }
8033
8034        public void onTextChanged(CharSequence buffer, int start,
8035                                  int before, int after) {
8036            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onTextChanged start=" + start
8037                    + " before=" + before + " after=" + after + ": " + buffer);
8038            TextView.this.handleTextChanged(buffer, start, before, after);
8039
8040            mEasyEditSpanController.onTextChange(buffer);
8041
8042            if (AccessibilityManager.getInstance(mContext).isEnabled() &&
8043                    (isFocused() || isSelected() && isShown())) {
8044                sendAccessibilityEventTypeViewTextChanged(mBeforeText, start, before, after);
8045                mBeforeText = null;
8046            }
8047        }
8048
8049        public void afterTextChanged(Editable buffer) {
8050            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "afterTextChanged: " + buffer);
8051            TextView.this.sendAfterTextChanged(buffer);
8052
8053            if (MetaKeyKeyListener.getMetaState(buffer, MetaKeyKeyListener.META_SELECTING) != 0) {
8054                MetaKeyKeyListener.stopSelecting(TextView.this, buffer);
8055            }
8056        }
8057
8058        public void onSpanChanged(Spannable buf,
8059                                  Object what, int s, int e, int st, int en) {
8060            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanChanged s=" + s + " e=" + e
8061                    + " st=" + st + " en=" + en + " what=" + what + ": " + buf);
8062            TextView.this.spanChange(buf, what, s, st, e, en);
8063        }
8064
8065        public void onSpanAdded(Spannable buf, Object what, int s, int e) {
8066            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanAdded s=" + s + " e=" + e
8067                    + " what=" + what + ": " + buf);
8068            TextView.this.spanChange(buf, what, -1, s, -1, e);
8069        }
8070
8071        public void onSpanRemoved(Spannable buf, Object what, int s, int e) {
8072            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanRemoved s=" + s + " e=" + e
8073                    + " what=" + what + ": " + buf);
8074            TextView.this.spanChange(buf, what, s, -1, e, -1);
8075        }
8076
8077        private void hideControllers() {
8078            mEasyEditSpanController.hide();
8079        }
8080    }
8081
8082    /**
8083     * @hide
8084     */
8085    @Override
8086    public void dispatchFinishTemporaryDetach() {
8087        mDispatchTemporaryDetach = true;
8088        super.dispatchFinishTemporaryDetach();
8089        mDispatchTemporaryDetach = false;
8090    }
8091
8092    @Override
8093    public void onStartTemporaryDetach() {
8094        super.onStartTemporaryDetach();
8095        // Only track when onStartTemporaryDetach() is called directly,
8096        // usually because this instance is an editable field in a list
8097        if (!mDispatchTemporaryDetach) mTemporaryDetach = true;
8098
8099        // Because of View recycling in ListView, there is no easy way to know when a TextView with
8100        // selection becomes visible again. Until a better solution is found, stop text selection
8101        // mode (if any) as soon as this TextView is recycled.
8102        hideControllers();
8103    }
8104
8105    @Override
8106    public void onFinishTemporaryDetach() {
8107        super.onFinishTemporaryDetach();
8108        // Only track when onStartTemporaryDetach() is called directly,
8109        // usually because this instance is an editable field in a list
8110        if (!mDispatchTemporaryDetach) mTemporaryDetach = false;
8111    }
8112
8113    @Override
8114    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
8115        if (mTemporaryDetach) {
8116            // If we are temporarily in the detach state, then do nothing.
8117            super.onFocusChanged(focused, direction, previouslyFocusedRect);
8118            return;
8119        }
8120
8121        mShowCursor = SystemClock.uptimeMillis();
8122
8123        ensureEndedBatchEdit();
8124
8125        if (focused) {
8126            int selStart = getSelectionStart();
8127            int selEnd = getSelectionEnd();
8128
8129            // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection
8130            // mode for these, unless there was a specific selection already started.
8131            final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 &&
8132                    selEnd == mText.length();
8133            mCreatedWithASelection = mFrozenWithFocus && hasSelection() && !isFocusHighlighted;
8134
8135            if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) {
8136                // If a tap was used to give focus to that view, move cursor at tap position.
8137                // Has to be done before onTakeFocus, which can be overloaded.
8138                final int lastTapPosition = getLastTapPosition();
8139                if (lastTapPosition >= 0) {
8140                    Selection.setSelection((Spannable) mText, lastTapPosition);
8141                }
8142
8143                if (mMovement != null) {
8144                    mMovement.onTakeFocus(this, (Spannable) mText, direction);
8145                }
8146
8147                // The DecorView does not have focus when the 'Done' ExtractEditText button is
8148                // pressed. Since it is the ViewAncestor's mView, it requests focus before
8149                // ExtractEditText clears focus, which gives focus to the ExtractEditText.
8150                // This special case ensure that we keep current selection in that case.
8151                // It would be better to know why the DecorView does not have focus at that time.
8152                if (((this instanceof ExtractEditText) || mSelectionMoved) &&
8153                        selStart >= 0 && selEnd >= 0) {
8154                    /*
8155                     * Someone intentionally set the selection, so let them
8156                     * do whatever it is that they wanted to do instead of
8157                     * the default on-focus behavior.  We reset the selection
8158                     * here instead of just skipping the onTakeFocus() call
8159                     * because some movement methods do something other than
8160                     * just setting the selection in theirs and we still
8161                     * need to go through that path.
8162                     */
8163                    Selection.setSelection((Spannable) mText, selStart, selEnd);
8164                }
8165
8166                if (mSelectAllOnFocus) {
8167                    selectAll();
8168                }
8169
8170                mTouchFocusSelected = true;
8171            }
8172
8173            mFrozenWithFocus = false;
8174            mSelectionMoved = false;
8175
8176            if (mText instanceof Spannable) {
8177                Spannable sp = (Spannable) mText;
8178                MetaKeyKeyListener.resetMetaState(sp);
8179            }
8180
8181            makeBlink();
8182
8183            if (mError != null) {
8184                showError();
8185            }
8186        } else {
8187            if (mError != null) {
8188                hideError();
8189            }
8190            // Don't leave us in the middle of a batch edit.
8191            onEndBatchEdit();
8192
8193            if (this instanceof ExtractEditText) {
8194                // terminateTextSelectionMode removes selection, which we want to keep when
8195                // ExtractEditText goes out of focus.
8196                final int selStart = getSelectionStart();
8197                final int selEnd = getSelectionEnd();
8198                hideControllers();
8199                Selection.setSelection((Spannable) mText, selStart, selEnd);
8200            } else {
8201                hideControllers();
8202                downgradeEasyCorrectionSpans();
8203            }
8204
8205            // No need to create the controller
8206            if (mSelectionModifierCursorController != null) {
8207                mSelectionModifierCursorController.resetTouchOffsets();
8208            }
8209        }
8210
8211        startStopMarquee(focused);
8212
8213        if (mTransformation != null) {
8214            mTransformation.onFocusChanged(this, mText, focused, direction, previouslyFocusedRect);
8215        }
8216
8217        super.onFocusChanged(focused, direction, previouslyFocusedRect);
8218    }
8219
8220    private int getLastTapPosition() {
8221        // No need to create the controller at that point, no last tap position saved
8222        if (mSelectionModifierCursorController != null) {
8223            int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset();
8224            if (lastTapPosition >= 0) {
8225                // Safety check, should not be possible.
8226                if (lastTapPosition > mText.length()) {
8227                    Log.e(LOG_TAG, "Invalid tap focus position (" + lastTapPosition + " vs "
8228                            + mText.length() + ")");
8229                    lastTapPosition = mText.length();
8230                }
8231                return lastTapPosition;
8232            }
8233        }
8234
8235        return -1;
8236    }
8237
8238    @Override
8239    public void onWindowFocusChanged(boolean hasWindowFocus) {
8240        super.onWindowFocusChanged(hasWindowFocus);
8241
8242        if (hasWindowFocus) {
8243            if (mBlink != null) {
8244                mBlink.uncancel();
8245                makeBlink();
8246            }
8247        } else {
8248            if (mBlink != null) {
8249                mBlink.cancel();
8250            }
8251            // Don't leave us in the middle of a batch edit.
8252            onEndBatchEdit();
8253            if (mInputContentType != null) {
8254                mInputContentType.enterDown = false;
8255            }
8256
8257            hideControllers();
8258            if (mSuggestionsPopupWindow != null) {
8259                mSuggestionsPopupWindow.onParentLostFocus();
8260            }
8261        }
8262
8263        startStopMarquee(hasWindowFocus);
8264    }
8265
8266    @Override
8267    protected void onVisibilityChanged(View changedView, int visibility) {
8268        super.onVisibilityChanged(changedView, visibility);
8269        if (visibility != VISIBLE) {
8270            hideControllers();
8271        }
8272    }
8273
8274    /**
8275     * Use {@link BaseInputConnection#removeComposingSpans
8276     * BaseInputConnection.removeComposingSpans()} to remove any IME composing
8277     * state from this text view.
8278     */
8279    public void clearComposingText() {
8280        if (mText instanceof Spannable) {
8281            BaseInputConnection.removeComposingSpans((Spannable)mText);
8282        }
8283    }
8284
8285    @Override
8286    public void setSelected(boolean selected) {
8287        boolean wasSelected = isSelected();
8288
8289        super.setSelected(selected);
8290
8291        if (selected != wasSelected && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
8292            if (selected) {
8293                startMarquee();
8294            } else {
8295                stopMarquee();
8296            }
8297        }
8298    }
8299
8300    @Override
8301    public boolean onTouchEvent(MotionEvent event) {
8302        final int action = event.getActionMasked();
8303
8304        if (hasSelectionController()) {
8305            getSelectionController().onTouchEvent(event);
8306        }
8307
8308        if (action == MotionEvent.ACTION_DOWN) {
8309            mLastDownPositionX = event.getX();
8310            mLastDownPositionY = event.getY();
8311
8312            // Reset this state; it will be re-set if super.onTouchEvent
8313            // causes focus to move to the view.
8314            mTouchFocusSelected = false;
8315            mIgnoreActionUpEvent = false;
8316        }
8317
8318        final boolean superResult = super.onTouchEvent(event);
8319
8320        /*
8321         * Don't handle the release after a long press, because it will
8322         * move the selection away from whatever the menu action was
8323         * trying to affect.
8324         */
8325        if (mDiscardNextActionUp && action == MotionEvent.ACTION_UP) {
8326            mDiscardNextActionUp = false;
8327            return superResult;
8328        }
8329
8330        final boolean touchIsFinished = (action == MotionEvent.ACTION_UP) &&
8331                !shouldIgnoreActionUpEvent() && isFocused();
8332
8333         if ((mMovement != null || onCheckIsTextEditor()) && isEnabled()
8334                && mText instanceof Spannable && mLayout != null) {
8335            boolean handled = false;
8336
8337            if (mMovement != null) {
8338                handled |= mMovement.onTouchEvent(this, (Spannable) mText, event);
8339            }
8340
8341            if (touchIsFinished && mLinksClickable && mAutoLinkMask != 0 && mTextIsSelectable) {
8342                // The LinkMovementMethod which should handle taps on links has not been installed
8343                // on non editable text that support text selection.
8344                // We reproduce its behavior here to open links for these.
8345                ClickableSpan[] links = ((Spannable) mText).getSpans(getSelectionStart(),
8346                        getSelectionEnd(), ClickableSpan.class);
8347
8348                if (links.length != 0) {
8349                    links[0].onClick(this);
8350                    handled = true;
8351                }
8352            }
8353
8354            if (touchIsFinished && (isTextEditable() || mTextIsSelectable)) {
8355                // Show the IME, except when selecting in read-only text.
8356                final InputMethodManager imm = InputMethodManager.peekInstance();
8357                viewClicked(imm);
8358                if (!mTextIsSelectable && mSoftInputShownOnFocus) {
8359                    handled |= imm != null && imm.showSoftInput(this, 0);
8360                }
8361
8362                boolean selectAllGotFocus = mSelectAllOnFocus && didTouchFocusSelect();
8363                hideControllers();
8364                if (!selectAllGotFocus && mText.length() > 0) {
8365                    if (mSpellChecker != null) {
8366                        // When the cursor moves, the word that was typed may need spell check
8367                        mSpellChecker.onSelectionChanged();
8368                    }
8369                    if (!extractedTextModeWillBeStarted()) {
8370                        if (isCursorInsideEasyCorrectionSpan()) {
8371                            showSuggestions();
8372                        } else if (hasInsertionController()) {
8373                            getInsertionController().show();
8374                        }
8375                    }
8376                }
8377
8378                handled = true;
8379            }
8380
8381            if (handled) {
8382                return true;
8383            }
8384        }
8385
8386        return superResult;
8387    }
8388
8389    /**
8390     * @return <code>true</code> if the cursor/current selection overlaps a {@link SuggestionSpan}.
8391     */
8392    private boolean isCursorInsideSuggestionSpan() {
8393        if (!(mText instanceof Spannable)) return false;
8394
8395        SuggestionSpan[] suggestionSpans = ((Spannable) mText).getSpans(getSelectionStart(),
8396                getSelectionEnd(), SuggestionSpan.class);
8397        return (suggestionSpans.length > 0);
8398    }
8399
8400    /**
8401     * @return <code>true</code> if the cursor is inside an {@link SuggestionSpan} with
8402     * {@link SuggestionSpan#FLAG_EASY_CORRECT} set.
8403     */
8404    private boolean isCursorInsideEasyCorrectionSpan() {
8405        Spannable spannable = (Spannable) mText;
8406        SuggestionSpan[] suggestionSpans = spannable.getSpans(getSelectionStart(),
8407                getSelectionEnd(), SuggestionSpan.class);
8408        for (int i = 0; i < suggestionSpans.length; i++) {
8409            if ((suggestionSpans[i].getFlags() & SuggestionSpan.FLAG_EASY_CORRECT) != 0) {
8410                return true;
8411            }
8412        }
8413        return false;
8414    }
8415
8416    /**
8417     * Downgrades to simple suggestions all the easy correction spans that are not a spell check
8418     * span.
8419     */
8420    private void downgradeEasyCorrectionSpans() {
8421        if (mText instanceof Spannable) {
8422            Spannable spannable = (Spannable) mText;
8423            SuggestionSpan[] suggestionSpans = spannable.getSpans(0,
8424                    spannable.length(), SuggestionSpan.class);
8425            for (int i = 0; i < suggestionSpans.length; i++) {
8426                int flags = suggestionSpans[i].getFlags();
8427                if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0
8428                        && (flags & SuggestionSpan.FLAG_MISSPELLED) == 0) {
8429                    flags &= ~SuggestionSpan.FLAG_EASY_CORRECT;
8430                    suggestionSpans[i].setFlags(flags);
8431                }
8432            }
8433        }
8434    }
8435
8436    @Override
8437    public boolean onGenericMotionEvent(MotionEvent event) {
8438        if (mMovement != null && mText instanceof Spannable && mLayout != null) {
8439            try {
8440                if (mMovement.onGenericMotionEvent(this, (Spannable) mText, event)) {
8441                    return true;
8442                }
8443            } catch (AbstractMethodError ex) {
8444                // onGenericMotionEvent was added to the MovementMethod interface in API 12.
8445                // Ignore its absence in case third party applications implemented the
8446                // interface directly.
8447            }
8448        }
8449        return super.onGenericMotionEvent(event);
8450    }
8451
8452    private void prepareCursorControllers() {
8453        boolean windowSupportsHandles = false;
8454
8455        ViewGroup.LayoutParams params = getRootView().getLayoutParams();
8456        if (params instanceof WindowManager.LayoutParams) {
8457            WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params;
8458            windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW
8459                    || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW;
8460        }
8461
8462        mInsertionControllerEnabled = windowSupportsHandles && isCursorVisible() && mLayout != null;
8463        mSelectionControllerEnabled = windowSupportsHandles && textCanBeSelected() &&
8464                mLayout != null;
8465
8466        if (!mInsertionControllerEnabled) {
8467            hideInsertionPointCursorController();
8468            if (mInsertionPointCursorController != null) {
8469                mInsertionPointCursorController.onDetached();
8470                mInsertionPointCursorController = null;
8471            }
8472        }
8473
8474        if (!mSelectionControllerEnabled) {
8475            stopSelectionActionMode();
8476            if (mSelectionModifierCursorController != null) {
8477                mSelectionModifierCursorController.onDetached();
8478                mSelectionModifierCursorController = null;
8479            }
8480        }
8481    }
8482
8483    /**
8484     * @return True iff this TextView contains a text that can be edited, or if this is
8485     * a selectable TextView.
8486     */
8487    private boolean isTextEditable() {
8488        return mText instanceof Editable && onCheckIsTextEditor() && isEnabled();
8489    }
8490
8491    /**
8492     * Returns true, only while processing a touch gesture, if the initial
8493     * touch down event caused focus to move to the text view and as a result
8494     * its selection changed.  Only valid while processing the touch gesture
8495     * of interest.
8496     */
8497    public boolean didTouchFocusSelect() {
8498        return mTouchFocusSelected;
8499    }
8500
8501    @Override
8502    public void cancelLongPress() {
8503        super.cancelLongPress();
8504        mIgnoreActionUpEvent = true;
8505    }
8506
8507    /**
8508     * This method is only valid during a touch event.
8509     *
8510     * @return true when the ACTION_UP event should be ignored, false otherwise.
8511     *
8512     * @hide
8513     */
8514    public boolean shouldIgnoreActionUpEvent() {
8515        return mIgnoreActionUpEvent;
8516    }
8517
8518    @Override
8519    public boolean onTrackballEvent(MotionEvent event) {
8520        if (mMovement != null && mText instanceof Spannable &&
8521            mLayout != null) {
8522            if (mMovement.onTrackballEvent(this, (Spannable) mText, event)) {
8523                return true;
8524            }
8525        }
8526
8527        return super.onTrackballEvent(event);
8528    }
8529
8530    public void setScroller(Scroller s) {
8531        mScroller = s;
8532    }
8533
8534    private static class Blink extends Handler implements Runnable {
8535        private final WeakReference<TextView> mView;
8536        private boolean mCancelled;
8537
8538        public Blink(TextView v) {
8539            mView = new WeakReference<TextView>(v);
8540        }
8541
8542        public void run() {
8543            if (mCancelled) {
8544                return;
8545            }
8546
8547            removeCallbacks(Blink.this);
8548
8549            TextView tv = mView.get();
8550
8551            if (tv != null && tv.shouldBlink()) {
8552                if (tv.mLayout != null) {
8553                    tv.invalidateCursorPath();
8554                }
8555
8556                postAtTime(this, SystemClock.uptimeMillis() + BLINK);
8557            }
8558        }
8559
8560        void cancel() {
8561            if (!mCancelled) {
8562                removeCallbacks(Blink.this);
8563                mCancelled = true;
8564            }
8565        }
8566
8567        void uncancel() {
8568            mCancelled = false;
8569        }
8570    }
8571
8572    /**
8573     * @return True when the TextView isFocused and has a valid zero-length selection (cursor).
8574     */
8575    private boolean shouldBlink() {
8576        if (!isFocused()) return false;
8577
8578        final int start = getSelectionStart();
8579        if (start < 0) return false;
8580
8581        final int end = getSelectionEnd();
8582        if (end < 0) return false;
8583
8584        return start == end;
8585    }
8586
8587    private void makeBlink() {
8588        if (isCursorVisible()) {
8589            if (shouldBlink()) {
8590                mShowCursor = SystemClock.uptimeMillis();
8591                if (mBlink == null) mBlink = new Blink(this);
8592                mBlink.removeCallbacks(mBlink);
8593                mBlink.postAtTime(mBlink, mShowCursor + BLINK);
8594            }
8595        } else {
8596            if (mBlink != null) mBlink.removeCallbacks(mBlink);
8597        }
8598    }
8599
8600    @Override
8601    protected float getLeftFadingEdgeStrength() {
8602        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
8603        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
8604                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
8605            if (mMarquee != null && !mMarquee.isStopped()) {
8606                final Marquee marquee = mMarquee;
8607                if (marquee.shouldDrawLeftFade()) {
8608                    return marquee.mScroll / getHorizontalFadingEdgeLength();
8609                } else {
8610                    return 0.0f;
8611                }
8612            } else if (getLineCount() == 1) {
8613                final int layoutDirection = getResolvedLayoutDirection();
8614                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8615                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8616                    case Gravity.LEFT:
8617                        return 0.0f;
8618                    case Gravity.RIGHT:
8619                        return (mLayout.getLineRight(0) - (mRight - mLeft) -
8620                                getCompoundPaddingLeft() - getCompoundPaddingRight() -
8621                                mLayout.getLineLeft(0)) / getHorizontalFadingEdgeLength();
8622                    case Gravity.CENTER_HORIZONTAL:
8623                        return 0.0f;
8624                }
8625            }
8626        }
8627        return super.getLeftFadingEdgeStrength();
8628    }
8629
8630    @Override
8631    protected float getRightFadingEdgeStrength() {
8632        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
8633        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
8634                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
8635            if (mMarquee != null && !mMarquee.isStopped()) {
8636                final Marquee marquee = mMarquee;
8637                return (marquee.mMaxFadeScroll - marquee.mScroll) / getHorizontalFadingEdgeLength();
8638            } else if (getLineCount() == 1) {
8639                final int layoutDirection = getResolvedLayoutDirection();
8640                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8641                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8642                    case Gravity.LEFT:
8643                        final int textWidth = (mRight - mLeft) - getCompoundPaddingLeft() -
8644                                getCompoundPaddingRight();
8645                        final float lineWidth = mLayout.getLineWidth(0);
8646                        return (lineWidth - textWidth) / getHorizontalFadingEdgeLength();
8647                    case Gravity.RIGHT:
8648                        return 0.0f;
8649                    case Gravity.CENTER_HORIZONTAL:
8650                    case Gravity.FILL_HORIZONTAL:
8651                        return (mLayout.getLineWidth(0) - ((mRight - mLeft) -
8652                                getCompoundPaddingLeft() - getCompoundPaddingRight())) /
8653                                getHorizontalFadingEdgeLength();
8654                }
8655            }
8656        }
8657        return super.getRightFadingEdgeStrength();
8658    }
8659
8660    @Override
8661    protected int computeHorizontalScrollRange() {
8662        if (mLayout != null) {
8663            return mSingleLine && (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) == Gravity.LEFT ?
8664                    (int) mLayout.getLineWidth(0) : mLayout.getWidth();
8665        }
8666
8667        return super.computeHorizontalScrollRange();
8668    }
8669
8670    @Override
8671    protected int computeVerticalScrollRange() {
8672        if (mLayout != null)
8673            return mLayout.getHeight();
8674
8675        return super.computeVerticalScrollRange();
8676    }
8677
8678    @Override
8679    protected int computeVerticalScrollExtent() {
8680        return getHeight() - getCompoundPaddingTop() - getCompoundPaddingBottom();
8681    }
8682
8683    @Override
8684    public void findViewsWithText(ArrayList<View> outViews, CharSequence searched, int flags) {
8685        super.findViewsWithText(outViews, searched, flags);
8686        if (!outViews.contains(this) && (flags & FIND_VIEWS_WITH_TEXT) != 0
8687                && !TextUtils.isEmpty(searched) && !TextUtils.isEmpty(mText)) {
8688            String searchedLowerCase = searched.toString().toLowerCase();
8689            String textLowerCase = mText.toString().toLowerCase();
8690            if (textLowerCase.contains(searchedLowerCase)) {
8691                outViews.add(this);
8692            }
8693        }
8694    }
8695
8696    public enum BufferType {
8697        NORMAL, SPANNABLE, EDITABLE,
8698    }
8699
8700    /**
8701     * Returns the TextView_textColor attribute from the
8702     * Resources.StyledAttributes, if set, or the TextAppearance_textColor
8703     * from the TextView_textAppearance attribute, if TextView_textColor
8704     * was not set directly.
8705     */
8706    public static ColorStateList getTextColors(Context context, TypedArray attrs) {
8707        ColorStateList colors;
8708        colors = attrs.getColorStateList(com.android.internal.R.styleable.
8709                                         TextView_textColor);
8710
8711        if (colors == null) {
8712            int ap = attrs.getResourceId(com.android.internal.R.styleable.
8713                                         TextView_textAppearance, -1);
8714            if (ap != -1) {
8715                TypedArray appearance;
8716                appearance = context.obtainStyledAttributes(ap,
8717                                            com.android.internal.R.styleable.TextAppearance);
8718                colors = appearance.getColorStateList(com.android.internal.R.styleable.
8719                                                  TextAppearance_textColor);
8720                appearance.recycle();
8721            }
8722        }
8723
8724        return colors;
8725    }
8726
8727    /**
8728     * Returns the default color from the TextView_textColor attribute
8729     * from the AttributeSet, if set, or the default color from the
8730     * TextAppearance_textColor from the TextView_textAppearance attribute,
8731     * if TextView_textColor was not set directly.
8732     */
8733    public static int getTextColor(Context context,
8734                                   TypedArray attrs,
8735                                   int def) {
8736        ColorStateList colors = getTextColors(context, attrs);
8737
8738        if (colors == null) {
8739            return def;
8740        } else {
8741            return colors.getDefaultColor();
8742        }
8743    }
8744
8745    @Override
8746    public boolean onKeyShortcut(int keyCode, KeyEvent event) {
8747        final int filteredMetaState = event.getMetaState() & ~KeyEvent.META_CTRL_MASK;
8748        if (KeyEvent.metaStateHasNoModifiers(filteredMetaState)) {
8749            switch (keyCode) {
8750            case KeyEvent.KEYCODE_A:
8751                if (canSelectText()) {
8752                    return onTextContextMenuItem(ID_SELECT_ALL);
8753                }
8754                break;
8755            case KeyEvent.KEYCODE_X:
8756                if (canCut()) {
8757                    return onTextContextMenuItem(ID_CUT);
8758                }
8759                break;
8760            case KeyEvent.KEYCODE_C:
8761                if (canCopy()) {
8762                    return onTextContextMenuItem(ID_COPY);
8763                }
8764                break;
8765            case KeyEvent.KEYCODE_V:
8766                if (canPaste()) {
8767                    return onTextContextMenuItem(ID_PASTE);
8768                }
8769                break;
8770            }
8771        }
8772        return super.onKeyShortcut(keyCode, event);
8773    }
8774
8775    /**
8776     * Unlike {@link #textCanBeSelected()}, this method is based on the <i>current</i> state of the
8777     * TextView. {@link #textCanBeSelected()} has to be true (this is one of the conditions to have
8778     * a selection controller (see {@link #prepareCursorControllers()}), but this is not sufficient.
8779     */
8780    private boolean canSelectText() {
8781        return hasSelectionController() && mText.length() != 0;
8782    }
8783
8784    /**
8785     * Test based on the <i>intrinsic</i> charateristics of the TextView.
8786     * The text must be spannable and the movement method must allow for arbitary selection.
8787     *
8788     * See also {@link #canSelectText()}.
8789     */
8790    private boolean textCanBeSelected() {
8791        // prepareCursorController() relies on this method.
8792        // If you change this condition, make sure prepareCursorController is called anywhere
8793        // the value of this condition might be changed.
8794        if (mMovement == null || !mMovement.canSelectArbitrarily()) return false;
8795        return isTextEditable() || (mTextIsSelectable && mText instanceof Spannable && isEnabled());
8796    }
8797
8798    private boolean canCut() {
8799        if (hasPasswordTransformationMethod()) {
8800            return false;
8801        }
8802
8803        if (mText.length() > 0 && hasSelection() && mText instanceof Editable && mInput != null) {
8804            return true;
8805        }
8806
8807        return false;
8808    }
8809
8810    private boolean canCopy() {
8811        if (hasPasswordTransformationMethod()) {
8812            return false;
8813        }
8814
8815        if (mText.length() > 0 && hasSelection()) {
8816            return true;
8817        }
8818
8819        return false;
8820    }
8821
8822    private boolean canPaste() {
8823        return (mText instanceof Editable &&
8824                mInput != null &&
8825                getSelectionStart() >= 0 &&
8826                getSelectionEnd() >= 0 &&
8827                ((ClipboardManager)getContext().getSystemService(Context.CLIPBOARD_SERVICE)).
8828                hasPrimaryClip());
8829    }
8830
8831    private static long packRangeInLong(int start, int end) {
8832        return (((long) start) << 32) | end;
8833    }
8834
8835    private static int extractRangeStartFromLong(long range) {
8836        return (int) (range >>> 32);
8837    }
8838
8839    private static int extractRangeEndFromLong(long range) {
8840        return (int) (range & 0x00000000FFFFFFFFL);
8841    }
8842
8843    private boolean selectAll() {
8844        final int length = mText.length();
8845        Selection.setSelection((Spannable) mText, 0, length);
8846        return length > 0;
8847    }
8848
8849    /**
8850     * Adjusts selection to the word under last touch offset.
8851     * Return true if the operation was successfully performed.
8852     */
8853    private boolean selectCurrentWord() {
8854        if (!canSelectText()) {
8855            return false;
8856        }
8857
8858        if (hasPasswordTransformationMethod()) {
8859            // Always select all on a password field.
8860            // Cut/copy menu entries are not available for passwords, but being able to select all
8861            // is however useful to delete or paste to replace the entire content.
8862            return selectAll();
8863        }
8864
8865        int klass = mInputType & InputType.TYPE_MASK_CLASS;
8866        int variation = mInputType & InputType.TYPE_MASK_VARIATION;
8867
8868        // Specific text field types: select the entire text for these
8869        if (klass == InputType.TYPE_CLASS_NUMBER ||
8870                klass == InputType.TYPE_CLASS_PHONE ||
8871                klass == InputType.TYPE_CLASS_DATETIME ||
8872                variation == InputType.TYPE_TEXT_VARIATION_URI ||
8873                variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS ||
8874                variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS ||
8875                variation == InputType.TYPE_TEXT_VARIATION_FILTER) {
8876            return selectAll();
8877        }
8878
8879        long lastTouchOffsets = getLastTouchOffsets();
8880        final int minOffset = extractRangeStartFromLong(lastTouchOffsets);
8881        final int maxOffset = extractRangeEndFromLong(lastTouchOffsets);
8882
8883        // Safety check in case standard touch event handling has been bypassed
8884        if (minOffset < 0 || minOffset >= mText.length()) return false;
8885        if (maxOffset < 0 || maxOffset >= mText.length()) return false;
8886
8887        int selectionStart, selectionEnd;
8888
8889        // If a URLSpan (web address, email, phone...) is found at that position, select it.
8890        URLSpan[] urlSpans = ((Spanned) mText).getSpans(minOffset, maxOffset, URLSpan.class);
8891        if (urlSpans.length >= 1) {
8892            URLSpan urlSpan = urlSpans[0];
8893            selectionStart = ((Spanned) mText).getSpanStart(urlSpan);
8894            selectionEnd = ((Spanned) mText).getSpanEnd(urlSpan);
8895        } else {
8896            final WordIterator wordIterator = getWordIterator();
8897            wordIterator.setCharSequence(mText, minOffset, maxOffset);
8898
8899            selectionStart = wordIterator.getBeginning(minOffset);
8900            if (selectionStart == BreakIterator.DONE) return false;
8901
8902            selectionEnd = wordIterator.getEnd(maxOffset);
8903            if (selectionEnd == BreakIterator.DONE) return false;
8904
8905            if (selectionStart == selectionEnd) {
8906                // Possible when the word iterator does not properly handle the text's language
8907                long range = getCharRange(selectionStart);
8908                selectionStart = extractRangeStartFromLong(range);
8909                selectionEnd = extractRangeEndFromLong(range);
8910            }
8911        }
8912
8913        Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
8914        return selectionEnd > selectionStart;
8915    }
8916
8917    /**
8918     * This is a temporary method. Future versions may support multi-locale text.
8919     *
8920     * @return The locale that should be used for a word iterator and a spell checker
8921     * in this TextView, based on the current spell checker settings,
8922     * the current IME's locale, or the system default locale.
8923     * @hide
8924     */
8925    public Locale getTextServicesLocale() {
8926        Locale locale = Locale.getDefault();
8927        final TextServicesManager textServicesManager = (TextServicesManager)
8928                mContext.getSystemService(Context.TEXT_SERVICES_MANAGER_SERVICE);
8929        final SpellCheckerSubtype subtype = textServicesManager.getCurrentSpellCheckerSubtype(true);
8930        if (subtype != null) {
8931            locale = new Locale(subtype.getLocale());
8932        }
8933        return locale;
8934    }
8935
8936    void onLocaleChanged() {
8937        removeMisspelledSpans((Editable) mText);
8938        // Will be re-created on demand in getWordIterator with the proper new locale
8939        mWordIterator = null;
8940    }
8941
8942    /**
8943     * @hide
8944     */
8945    public WordIterator getWordIterator() {
8946        if (mWordIterator == null) {
8947            mWordIterator = new WordIterator(getTextServicesLocale());
8948        }
8949        return mWordIterator;
8950    }
8951
8952    private long getCharRange(int offset) {
8953        final int textLength = mText.length();
8954        if (offset + 1 < textLength) {
8955            final char currentChar = mText.charAt(offset);
8956            final char nextChar = mText.charAt(offset + 1);
8957            if (Character.isSurrogatePair(currentChar, nextChar)) {
8958                return packRangeInLong(offset,  offset + 2);
8959            }
8960        }
8961        if (offset < textLength) {
8962            return packRangeInLong(offset,  offset + 1);
8963        }
8964        if (offset - 2 >= 0) {
8965            final char previousChar = mText.charAt(offset - 1);
8966            final char previousPreviousChar = mText.charAt(offset - 2);
8967            if (Character.isSurrogatePair(previousPreviousChar, previousChar)) {
8968                return packRangeInLong(offset - 2,  offset);
8969            }
8970        }
8971        if (offset - 1 >= 0) {
8972            return packRangeInLong(offset - 1,  offset);
8973        }
8974        return packRangeInLong(offset,  offset);
8975    }
8976
8977    private long getLastTouchOffsets() {
8978        SelectionModifierCursorController selectionController = getSelectionController();
8979        final int minOffset = selectionController.getMinTouchOffset();
8980        final int maxOffset = selectionController.getMaxTouchOffset();
8981        return packRangeInLong(minOffset, maxOffset);
8982    }
8983
8984    @Override
8985    public void onPopulateAccessibilityEvent(AccessibilityEvent event) {
8986        super.onPopulateAccessibilityEvent(event);
8987
8988        final boolean isPassword = hasPasswordTransformationMethod();
8989        if (!isPassword) {
8990            CharSequence text = getTextForAccessibility();
8991            if (!TextUtils.isEmpty(text)) {
8992                event.getText().add(text);
8993            }
8994        }
8995    }
8996
8997    @Override
8998    public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
8999        super.onInitializeAccessibilityEvent(event);
9000
9001        final boolean isPassword = hasPasswordTransformationMethod();
9002        event.setPassword(isPassword);
9003
9004        if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED) {
9005            event.setFromIndex(Selection.getSelectionStart(mText));
9006            event.setToIndex(Selection.getSelectionEnd(mText));
9007            event.setItemCount(mText.length());
9008        }
9009    }
9010
9011    @Override
9012    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
9013        super.onInitializeAccessibilityNodeInfo(info);
9014
9015        final boolean isPassword = hasPasswordTransformationMethod();
9016        if (!isPassword) {
9017            info.setText(getTextForAccessibility());
9018        }
9019        info.setPassword(isPassword);
9020    }
9021
9022    @Override
9023    public void sendAccessibilityEvent(int eventType) {
9024        // Do not send scroll events since first they are not interesting for
9025        // accessibility and second such events a generated too frequently.
9026        // For details see the implementation of bringTextIntoView().
9027        if (eventType == AccessibilityEvent.TYPE_VIEW_SCROLLED) {
9028            return;
9029        }
9030        super.sendAccessibilityEvent(eventType);
9031    }
9032
9033    /**
9034     * Gets the text reported for accessibility purposes. It is the
9035     * text if not empty or the hint.
9036     *
9037     * @return The accessibility text.
9038     */
9039    private CharSequence getTextForAccessibility() {
9040        CharSequence text = getText();
9041        if (TextUtils.isEmpty(text)) {
9042            text = getHint();
9043        }
9044        return text;
9045    }
9046
9047    void sendAccessibilityEventTypeViewTextChanged(CharSequence beforeText,
9048            int fromIndex, int removedCount, int addedCount) {
9049        AccessibilityEvent event =
9050            AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
9051        event.setFromIndex(fromIndex);
9052        event.setRemovedCount(removedCount);
9053        event.setAddedCount(addedCount);
9054        event.setBeforeText(beforeText);
9055        sendAccessibilityEventUnchecked(event);
9056    }
9057
9058    /**
9059     * Returns whether this text view is a current input method target.  The
9060     * default implementation just checks with {@link InputMethodManager}.
9061     */
9062    public boolean isInputMethodTarget() {
9063        InputMethodManager imm = InputMethodManager.peekInstance();
9064        return imm != null && imm.isActive(this);
9065    }
9066
9067    // Selection context mode
9068    private static final int ID_SELECT_ALL = android.R.id.selectAll;
9069    private static final int ID_CUT = android.R.id.cut;
9070    private static final int ID_COPY = android.R.id.copy;
9071    private static final int ID_PASTE = android.R.id.paste;
9072
9073    /**
9074     * Called when a context menu option for the text view is selected.  Currently
9075     * this will be one of {@link android.R.id#selectAll}, {@link android.R.id#cut},
9076     * {@link android.R.id#copy} or {@link android.R.id#paste}.
9077     *
9078     * @return true if the context menu item action was performed.
9079     */
9080    public boolean onTextContextMenuItem(int id) {
9081        int min = 0;
9082        int max = mText.length();
9083
9084        if (isFocused()) {
9085            final int selStart = getSelectionStart();
9086            final int selEnd = getSelectionEnd();
9087
9088            min = Math.max(0, Math.min(selStart, selEnd));
9089            max = Math.max(0, Math.max(selStart, selEnd));
9090        }
9091
9092        switch (id) {
9093            case ID_SELECT_ALL:
9094                // This does not enter text selection mode. Text is highlighted, so that it can be
9095                // bulk edited, like selectAllOnFocus does. Returns true even if text is empty.
9096                selectAll();
9097                return true;
9098
9099            case ID_PASTE:
9100                paste(min, max);
9101                return true;
9102
9103            case ID_CUT:
9104                setPrimaryClip(ClipData.newPlainText(null, getTransformedText(min, max)));
9105                deleteText_internal(min, max);
9106                stopSelectionActionMode();
9107                return true;
9108
9109            case ID_COPY:
9110                setPrimaryClip(ClipData.newPlainText(null, getTransformedText(min, max)));
9111                stopSelectionActionMode();
9112                return true;
9113        }
9114        return false;
9115    }
9116
9117    private CharSequence getTransformedText(int start, int end) {
9118        return removeSuggestionSpans(mTransformed.subSequence(start, end));
9119    }
9120
9121    /**
9122     * Prepare text so that there are not zero or two spaces at beginning and end of region defined
9123     * by [min, max] when replacing this region by paste.
9124     * Note that if there were two spaces (or more) at that position before, they are kept. We just
9125     * make sure we do not add an extra one from the paste content.
9126     */
9127    private long prepareSpacesAroundPaste(int min, int max, CharSequence paste) {
9128        if (paste.length() > 0) {
9129            if (min > 0) {
9130                final char charBefore = mTransformed.charAt(min - 1);
9131                final char charAfter = paste.charAt(0);
9132
9133                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
9134                    // Two spaces at beginning of paste: remove one
9135                    final int originalLength = mText.length();
9136                    deleteText_internal(min - 1, min);
9137                    // Due to filters, there is no guarantee that exactly one character was
9138                    // removed: count instead.
9139                    final int delta = mText.length() - originalLength;
9140                    min += delta;
9141                    max += delta;
9142                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
9143                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
9144                    // No space at beginning of paste: add one
9145                    final int originalLength = mText.length();
9146                    replaceText_internal(min, min, " ");
9147                    // Taking possible filters into account as above.
9148                    final int delta = mText.length() - originalLength;
9149                    min += delta;
9150                    max += delta;
9151                }
9152            }
9153
9154            if (max < mText.length()) {
9155                final char charBefore = paste.charAt(paste.length() - 1);
9156                final char charAfter = mTransformed.charAt(max);
9157
9158                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
9159                    // Two spaces at end of paste: remove one
9160                    deleteText_internal(max, max + 1);
9161                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
9162                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
9163                    // No space at end of paste: add one
9164                    replaceText_internal(max, max, " ");
9165                }
9166            }
9167        }
9168
9169        return packRangeInLong(min, max);
9170    }
9171
9172    private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) {
9173        TextView shadowView = (TextView) inflate(mContext,
9174                com.android.internal.R.layout.text_drag_thumbnail, null);
9175
9176        if (shadowView == null) {
9177            throw new IllegalArgumentException("Unable to inflate text drag thumbnail");
9178        }
9179
9180        if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) {
9181            text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH);
9182        }
9183        shadowView.setText(text);
9184        shadowView.setTextColor(getTextColors());
9185
9186        shadowView.setTextAppearance(mContext, R.styleable.Theme_textAppearanceLarge);
9187        shadowView.setGravity(Gravity.CENTER);
9188
9189        shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
9190                ViewGroup.LayoutParams.WRAP_CONTENT));
9191
9192        final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
9193        shadowView.measure(size, size);
9194
9195        shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight());
9196        shadowView.invalidate();
9197        return new DragShadowBuilder(shadowView);
9198    }
9199
9200    private static class DragLocalState {
9201        public TextView sourceTextView;
9202        public int start, end;
9203
9204        public DragLocalState(TextView sourceTextView, int start, int end) {
9205            this.sourceTextView = sourceTextView;
9206            this.start = start;
9207            this.end = end;
9208        }
9209    }
9210
9211    @Override
9212    public boolean performLongClick() {
9213        boolean handled = false;
9214        boolean vibrate = true;
9215
9216        if (super.performLongClick()) {
9217            mDiscardNextActionUp = true;
9218            handled = true;
9219        }
9220
9221        // Long press in empty space moves cursor and shows the Paste affordance if available.
9222        if (!handled && !isPositionOnText(mLastDownPositionX, mLastDownPositionY) &&
9223                mInsertionControllerEnabled) {
9224            final int offset = getOffsetForPosition(mLastDownPositionX, mLastDownPositionY);
9225            stopSelectionActionMode();
9226            Selection.setSelection((Spannable) mText, offset);
9227            getInsertionController().showWithActionPopup();
9228            handled = true;
9229            vibrate = false;
9230        }
9231
9232        if (!handled && mSelectionActionMode != null) {
9233            if (touchPositionIsInSelection()) {
9234                // Start a drag
9235                final int start = getSelectionStart();
9236                final int end = getSelectionEnd();
9237                CharSequence selectedText = getTransformedText(start, end);
9238                ClipData data = ClipData.newPlainText(null, selectedText);
9239                DragLocalState localState = new DragLocalState(this, start, end);
9240                startDrag(data, getTextThumbnailBuilder(selectedText), localState, 0);
9241                stopSelectionActionMode();
9242            } else {
9243                getSelectionController().hide();
9244                selectCurrentWord();
9245                getSelectionController().show();
9246            }
9247            handled = true;
9248        }
9249
9250        // Start a new selection
9251        if (!handled) {
9252            vibrate = handled = startSelectionActionMode();
9253        }
9254
9255        if (vibrate) {
9256            performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
9257        }
9258
9259        if (handled) {
9260            mDiscardNextActionUp = true;
9261        }
9262
9263        return handled;
9264    }
9265
9266    private boolean touchPositionIsInSelection() {
9267        int selectionStart = getSelectionStart();
9268        int selectionEnd = getSelectionEnd();
9269
9270        if (selectionStart == selectionEnd) {
9271            return false;
9272        }
9273
9274        if (selectionStart > selectionEnd) {
9275            int tmp = selectionStart;
9276            selectionStart = selectionEnd;
9277            selectionEnd = tmp;
9278            Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
9279        }
9280
9281        SelectionModifierCursorController selectionController = getSelectionController();
9282        int minOffset = selectionController.getMinTouchOffset();
9283        int maxOffset = selectionController.getMaxTouchOffset();
9284
9285        return ((minOffset >= selectionStart) && (maxOffset < selectionEnd));
9286    }
9287
9288    private PositionListener getPositionListener() {
9289        if (mPositionListener == null) {
9290            mPositionListener = new PositionListener();
9291        }
9292        return mPositionListener;
9293    }
9294
9295    private interface TextViewPositionListener {
9296        public void updatePosition(int parentPositionX, int parentPositionY,
9297                boolean parentPositionChanged, boolean parentScrolled);
9298    }
9299
9300    private class PositionListener implements ViewTreeObserver.OnPreDrawListener {
9301        // 3 handles
9302        // 3 ActionPopup [replace, suggestion, easyedit] (suggestionsPopup first hides the others)
9303        private final int MAXIMUM_NUMBER_OF_LISTENERS = 6;
9304        private TextViewPositionListener[] mPositionListeners =
9305                new TextViewPositionListener[MAXIMUM_NUMBER_OF_LISTENERS];
9306        private boolean mCanMove[] = new boolean[MAXIMUM_NUMBER_OF_LISTENERS];
9307        private boolean mPositionHasChanged = true;
9308        // Absolute position of the TextView with respect to its parent window
9309        private int mPositionX, mPositionY;
9310        private int mNumberOfListeners;
9311        private boolean mScrollHasChanged;
9312
9313        public void addSubscriber(TextViewPositionListener positionListener, boolean canMove) {
9314            if (mNumberOfListeners == 0) {
9315                updatePosition();
9316                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
9317                vto.addOnPreDrawListener(this);
9318            }
9319
9320            int emptySlotIndex = -1;
9321            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
9322                TextViewPositionListener listener = mPositionListeners[i];
9323                if (listener == positionListener) {
9324                    return;
9325                } else if (emptySlotIndex < 0 && listener == null) {
9326                    emptySlotIndex = i;
9327                }
9328            }
9329
9330            mPositionListeners[emptySlotIndex] = positionListener;
9331            mCanMove[emptySlotIndex] = canMove;
9332            mNumberOfListeners++;
9333        }
9334
9335        public void removeSubscriber(TextViewPositionListener positionListener) {
9336            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
9337                if (mPositionListeners[i] == positionListener) {
9338                    mPositionListeners[i] = null;
9339                    mNumberOfListeners--;
9340                    break;
9341                }
9342            }
9343
9344            if (mNumberOfListeners == 0) {
9345                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
9346                vto.removeOnPreDrawListener(this);
9347            }
9348        }
9349
9350        public int getPositionX() {
9351            return mPositionX;
9352        }
9353
9354        public int getPositionY() {
9355            return mPositionY;
9356        }
9357
9358        @Override
9359        public boolean onPreDraw() {
9360            updatePosition();
9361
9362            for (int i = 0; i < MAXIMUM_NUMBER_OF_LISTENERS; i++) {
9363                if (mPositionHasChanged || mScrollHasChanged || mCanMove[i]) {
9364                    TextViewPositionListener positionListener = mPositionListeners[i];
9365                    if (positionListener != null) {
9366                        positionListener.updatePosition(mPositionX, mPositionY,
9367                                mPositionHasChanged, mScrollHasChanged);
9368                    }
9369                }
9370            }
9371
9372            mScrollHasChanged = false;
9373            return true;
9374        }
9375
9376        private void updatePosition() {
9377            TextView.this.getLocationInWindow(mTempCoords);
9378
9379            mPositionHasChanged = mTempCoords[0] != mPositionX || mTempCoords[1] != mPositionY;
9380
9381            mPositionX = mTempCoords[0];
9382            mPositionY = mTempCoords[1];
9383        }
9384
9385        public void onScrollChanged() {
9386            mScrollHasChanged = true;
9387        }
9388    }
9389
9390    private boolean isPositionVisible(int positionX, int positionY) {
9391        synchronized (sTmpPosition) {
9392            final float[] position = sTmpPosition;
9393            position[0] = positionX;
9394            position[1] = positionY;
9395            View view = this;
9396
9397            while (view != null) {
9398                if (view != this) {
9399                    // Local scroll is already taken into account in positionX/Y
9400                    position[0] -= view.getScrollX();
9401                    position[1] -= view.getScrollY();
9402                }
9403
9404                if (position[0] < 0 || position[1] < 0 ||
9405                        position[0] > view.getWidth() || position[1] > view.getHeight()) {
9406                    return false;
9407                }
9408
9409                if (!view.getMatrix().isIdentity()) {
9410                    view.getMatrix().mapPoints(position);
9411                }
9412
9413                position[0] += view.getLeft();
9414                position[1] += view.getTop();
9415
9416                final ViewParent parent = view.getParent();
9417                if (parent instanceof View) {
9418                    view = (View) parent;
9419                } else {
9420                    // We've reached the ViewRoot, stop iterating
9421                    view = null;
9422                }
9423            }
9424        }
9425
9426        // We've been able to walk up the view hierarchy and the position was never clipped
9427        return true;
9428    }
9429
9430    private boolean isOffsetVisible(int offset) {
9431        final int line = mLayout.getLineForOffset(offset);
9432        final int lineBottom = mLayout.getLineBottom(line);
9433        final int primaryHorizontal = (int) mLayout.getPrimaryHorizontal(offset);
9434        return isPositionVisible(primaryHorizontal + viewportToContentHorizontalOffset(),
9435                lineBottom + viewportToContentVerticalOffset());
9436    }
9437
9438    @Override
9439    protected void onScrollChanged(int horiz, int vert, int oldHoriz, int oldVert) {
9440        super.onScrollChanged(horiz, vert, oldHoriz, oldVert);
9441        if (mPositionListener != null) {
9442            mPositionListener.onScrollChanged();
9443        }
9444    }
9445
9446    private abstract class PinnedPopupWindow implements TextViewPositionListener {
9447        protected PopupWindow mPopupWindow;
9448        protected ViewGroup mContentView;
9449        int mPositionX, mPositionY;
9450
9451        protected abstract void createPopupWindow();
9452        protected abstract void initContentView();
9453        protected abstract int getTextOffset();
9454        protected abstract int getVerticalLocalPosition(int line);
9455        protected abstract int clipVertically(int positionY);
9456
9457        public PinnedPopupWindow() {
9458            createPopupWindow();
9459
9460            mPopupWindow.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
9461            mPopupWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
9462            mPopupWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
9463
9464            initContentView();
9465
9466            LayoutParams wrapContent = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
9467                    ViewGroup.LayoutParams.WRAP_CONTENT);
9468            mContentView.setLayoutParams(wrapContent);
9469
9470            mPopupWindow.setContentView(mContentView);
9471        }
9472
9473        public void show() {
9474            TextView.this.getPositionListener().addSubscriber(this, false /* offset is fixed */);
9475
9476            computeLocalPosition();
9477
9478            final PositionListener positionListener = TextView.this.getPositionListener();
9479            updatePosition(positionListener.getPositionX(), positionListener.getPositionY());
9480        }
9481
9482        protected void measureContent() {
9483            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9484            mContentView.measure(
9485                    View.MeasureSpec.makeMeasureSpec(displayMetrics.widthPixels,
9486                            View.MeasureSpec.AT_MOST),
9487                    View.MeasureSpec.makeMeasureSpec(displayMetrics.heightPixels,
9488                            View.MeasureSpec.AT_MOST));
9489        }
9490
9491        /* The popup window will be horizontally centered on the getTextOffset() and vertically
9492         * positioned according to viewportToContentHorizontalOffset.
9493         *
9494         * This method assumes that mContentView has properly been measured from its content. */
9495        private void computeLocalPosition() {
9496            measureContent();
9497            final int width = mContentView.getMeasuredWidth();
9498            final int offset = getTextOffset();
9499            mPositionX = (int) (mLayout.getPrimaryHorizontal(offset) - width / 2.0f);
9500            mPositionX += viewportToContentHorizontalOffset();
9501
9502            final int line = mLayout.getLineForOffset(offset);
9503            mPositionY = getVerticalLocalPosition(line);
9504            mPositionY += viewportToContentVerticalOffset();
9505        }
9506
9507        private void updatePosition(int parentPositionX, int parentPositionY) {
9508            int positionX = parentPositionX + mPositionX;
9509            int positionY = parentPositionY + mPositionY;
9510
9511            positionY = clipVertically(positionY);
9512
9513            // Horizontal clipping
9514            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9515            final int width = mContentView.getMeasuredWidth();
9516            positionX = Math.min(displayMetrics.widthPixels - width, positionX);
9517            positionX = Math.max(0, positionX);
9518
9519            if (isShowing()) {
9520                mPopupWindow.update(positionX, positionY, -1, -1);
9521            } else {
9522                mPopupWindow.showAtLocation(TextView.this, Gravity.NO_GRAVITY,
9523                        positionX, positionY);
9524            }
9525        }
9526
9527        public void hide() {
9528            mPopupWindow.dismiss();
9529            TextView.this.getPositionListener().removeSubscriber(this);
9530        }
9531
9532        @Override
9533        public void updatePosition(int parentPositionX, int parentPositionY,
9534                boolean parentPositionChanged, boolean parentScrolled) {
9535            // Either parentPositionChanged or parentScrolled is true, check if still visible
9536            if (isShowing() && isOffsetVisible(getTextOffset())) {
9537                if (parentScrolled) computeLocalPosition();
9538                updatePosition(parentPositionX, parentPositionY);
9539            } else {
9540                hide();
9541            }
9542        }
9543
9544        public boolean isShowing() {
9545            return mPopupWindow.isShowing();
9546        }
9547    }
9548
9549    private class SuggestionsPopupWindow extends PinnedPopupWindow implements OnItemClickListener {
9550        private static final int MAX_NUMBER_SUGGESTIONS = SuggestionSpan.SUGGESTIONS_MAX_SIZE;
9551        private static final int ADD_TO_DICTIONARY = -1;
9552        private static final int DELETE_TEXT = -2;
9553        private SuggestionInfo[] mSuggestionInfos;
9554        private int mNumberOfSuggestions;
9555        private boolean mCursorWasVisibleBeforeSuggestions;
9556        private boolean mIsShowingUp = false;
9557        private SuggestionAdapter mSuggestionsAdapter;
9558        private final Comparator<SuggestionSpan> mSuggestionSpanComparator;
9559        private final HashMap<SuggestionSpan, Integer> mSpansLengths;
9560
9561        private class CustomPopupWindow extends PopupWindow {
9562            public CustomPopupWindow(Context context, int defStyle) {
9563                super(context, null, defStyle);
9564            }
9565
9566            @Override
9567            public void dismiss() {
9568                super.dismiss();
9569
9570                TextView.this.getPositionListener().removeSubscriber(SuggestionsPopupWindow.this);
9571
9572                // Safe cast since show() checks that mText is an Editable
9573                ((Spannable) mText).removeSpan(mSuggestionRangeSpan);
9574
9575                setCursorVisible(mCursorWasVisibleBeforeSuggestions);
9576                if (hasInsertionController()) {
9577                    getInsertionController().show();
9578                }
9579            }
9580        }
9581
9582        public SuggestionsPopupWindow() {
9583            mCursorWasVisibleBeforeSuggestions = mCursorVisible;
9584            mSuggestionSpanComparator = new SuggestionSpanComparator();
9585            mSpansLengths = new HashMap<SuggestionSpan, Integer>();
9586        }
9587
9588        @Override
9589        protected void createPopupWindow() {
9590            mPopupWindow = new CustomPopupWindow(TextView.this.mContext,
9591                com.android.internal.R.attr.textSuggestionsWindowStyle);
9592            mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
9593            mPopupWindow.setFocusable(true);
9594            mPopupWindow.setClippingEnabled(false);
9595        }
9596
9597        @Override
9598        protected void initContentView() {
9599            ListView listView = new ListView(TextView.this.getContext());
9600            mSuggestionsAdapter = new SuggestionAdapter();
9601            listView.setAdapter(mSuggestionsAdapter);
9602            listView.setOnItemClickListener(this);
9603            mContentView = listView;
9604
9605            // Inflate the suggestion items once and for all. + 2 for add to dictionary and delete
9606            mSuggestionInfos = new SuggestionInfo[MAX_NUMBER_SUGGESTIONS + 2];
9607            for (int i = 0; i < mSuggestionInfos.length; i++) {
9608                mSuggestionInfos[i] = new SuggestionInfo();
9609            }
9610        }
9611
9612        public boolean isShowingUp() {
9613            return mIsShowingUp;
9614        }
9615
9616        public void onParentLostFocus() {
9617            mIsShowingUp = false;
9618        }
9619
9620        private class SuggestionInfo {
9621            int suggestionStart, suggestionEnd; // range of actual suggestion within text
9622            SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents
9623            int suggestionIndex; // the index of this suggestion inside suggestionSpan
9624            SpannableStringBuilder text = new SpannableStringBuilder();
9625            TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mContext,
9626                    android.R.style.TextAppearance_SuggestionHighlight);
9627        }
9628
9629        private class SuggestionAdapter extends BaseAdapter {
9630            private LayoutInflater mInflater = (LayoutInflater) TextView.this.mContext.
9631                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
9632
9633            @Override
9634            public int getCount() {
9635                return mNumberOfSuggestions;
9636            }
9637
9638            @Override
9639            public Object getItem(int position) {
9640                return mSuggestionInfos[position];
9641            }
9642
9643            @Override
9644            public long getItemId(int position) {
9645                return position;
9646            }
9647
9648            @Override
9649            public View getView(int position, View convertView, ViewGroup parent) {
9650                TextView textView = (TextView) convertView;
9651
9652                if (textView == null) {
9653                    textView = (TextView) mInflater.inflate(mTextEditSuggestionItemLayout, parent,
9654                            false);
9655                }
9656
9657                final SuggestionInfo suggestionInfo = mSuggestionInfos[position];
9658                textView.setText(suggestionInfo.text);
9659
9660                if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) {
9661                    textView.setCompoundDrawablesWithIntrinsicBounds(
9662                            com.android.internal.R.drawable.ic_suggestions_add, 0, 0, 0);
9663                } else if (suggestionInfo.suggestionIndex == DELETE_TEXT) {
9664                    textView.setCompoundDrawablesWithIntrinsicBounds(
9665                            com.android.internal.R.drawable.ic_suggestions_delete, 0, 0, 0);
9666                } else {
9667                    textView.setCompoundDrawables(null, null, null, null);
9668                }
9669
9670                return textView;
9671            }
9672        }
9673
9674        private class SuggestionSpanComparator implements Comparator<SuggestionSpan> {
9675            public int compare(SuggestionSpan span1, SuggestionSpan span2) {
9676                final int flag1 = span1.getFlags();
9677                final int flag2 = span2.getFlags();
9678                if (flag1 != flag2) {
9679                    // The order here should match what is used in updateDrawState
9680                    final boolean easy1 = (flag1 & SuggestionSpan.FLAG_EASY_CORRECT) != 0;
9681                    final boolean easy2 = (flag2 & SuggestionSpan.FLAG_EASY_CORRECT) != 0;
9682                    final boolean misspelled1 = (flag1 & SuggestionSpan.FLAG_MISSPELLED) != 0;
9683                    final boolean misspelled2 = (flag2 & SuggestionSpan.FLAG_MISSPELLED) != 0;
9684                    if (easy1 && !misspelled1) return -1;
9685                    if (easy2 && !misspelled2) return 1;
9686                    if (misspelled1) return -1;
9687                    if (misspelled2) return 1;
9688                }
9689
9690                return mSpansLengths.get(span1).intValue() - mSpansLengths.get(span2).intValue();
9691            }
9692        }
9693
9694        /**
9695         * Returns the suggestion spans that cover the current cursor position. The suggestion
9696         * spans are sorted according to the length of text that they are attached to.
9697         */
9698        private SuggestionSpan[] getSuggestionSpans() {
9699            int pos = TextView.this.getSelectionStart();
9700            Spannable spannable = (Spannable) TextView.this.mText;
9701            SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class);
9702
9703            mSpansLengths.clear();
9704            for (SuggestionSpan suggestionSpan : suggestionSpans) {
9705                int start = spannable.getSpanStart(suggestionSpan);
9706                int end = spannable.getSpanEnd(suggestionSpan);
9707                mSpansLengths.put(suggestionSpan, Integer.valueOf(end - start));
9708            }
9709
9710            // The suggestions are sorted according to their types (easy correction first, then
9711            // misspelled) and to the length of the text that they cover (shorter first).
9712            Arrays.sort(suggestionSpans, mSuggestionSpanComparator);
9713            return suggestionSpans;
9714        }
9715
9716        @Override
9717        public void show() {
9718            if (!(mText instanceof Editable)) return;
9719
9720            updateSuggestions();
9721            mCursorWasVisibleBeforeSuggestions = mCursorVisible;
9722            setCursorVisible(false);
9723            mIsShowingUp = true;
9724            super.show();
9725        }
9726
9727        @Override
9728        protected void measureContent() {
9729            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9730            final int horizontalMeasure = View.MeasureSpec.makeMeasureSpec(
9731                    displayMetrics.widthPixels, View.MeasureSpec.AT_MOST);
9732            final int verticalMeasure = View.MeasureSpec.makeMeasureSpec(
9733                    displayMetrics.heightPixels, View.MeasureSpec.AT_MOST);
9734
9735            int width = 0;
9736            View view = null;
9737            for (int i = 0; i < mNumberOfSuggestions; i++) {
9738                view = mSuggestionsAdapter.getView(i, view, mContentView);
9739                view.getLayoutParams().width = LayoutParams.WRAP_CONTENT;
9740                view.measure(horizontalMeasure, verticalMeasure);
9741                width = Math.max(width, view.getMeasuredWidth());
9742            }
9743
9744            // Enforce the width based on actual text widths
9745            mContentView.measure(
9746                    View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY),
9747                    verticalMeasure);
9748
9749            Drawable popupBackground = mPopupWindow.getBackground();
9750            if (popupBackground != null) {
9751                if (mTempRect == null) mTempRect = new Rect();
9752                popupBackground.getPadding(mTempRect);
9753                width += mTempRect.left + mTempRect.right;
9754            }
9755            mPopupWindow.setWidth(width);
9756        }
9757
9758        @Override
9759        protected int getTextOffset() {
9760            return getSelectionStart();
9761        }
9762
9763        @Override
9764        protected int getVerticalLocalPosition(int line) {
9765            return mLayout.getLineBottom(line);
9766        }
9767
9768        @Override
9769        protected int clipVertically(int positionY) {
9770            final int height = mContentView.getMeasuredHeight();
9771            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9772            return Math.min(positionY, displayMetrics.heightPixels - height);
9773        }
9774
9775        @Override
9776        public void hide() {
9777            super.hide();
9778        }
9779
9780        private void updateSuggestions() {
9781            Spannable spannable = (Spannable) TextView.this.mText;
9782            SuggestionSpan[] suggestionSpans = getSuggestionSpans();
9783
9784            final int nbSpans = suggestionSpans.length;
9785
9786            mNumberOfSuggestions = 0;
9787            int spanUnionStart = mText.length();
9788            int spanUnionEnd = 0;
9789
9790            SuggestionSpan misspelledSpan = null;
9791            int underlineColor = 0;
9792
9793            for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) {
9794                SuggestionSpan suggestionSpan = suggestionSpans[spanIndex];
9795                final int spanStart = spannable.getSpanStart(suggestionSpan);
9796                final int spanEnd = spannable.getSpanEnd(suggestionSpan);
9797                spanUnionStart = Math.min(spanStart, spanUnionStart);
9798                spanUnionEnd = Math.max(spanEnd, spanUnionEnd);
9799
9800                if ((suggestionSpan.getFlags() & SuggestionSpan.FLAG_MISSPELLED) != 0) {
9801                    misspelledSpan = suggestionSpan;
9802                }
9803
9804                // The first span dictates the background color of the highlighted text
9805                if (spanIndex == 0) underlineColor = suggestionSpan.getUnderlineColor();
9806
9807                String[] suggestions = suggestionSpan.getSuggestions();
9808                int nbSuggestions = suggestions.length;
9809                for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) {
9810                    SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions];
9811                    suggestionInfo.suggestionSpan = suggestionSpan;
9812                    suggestionInfo.suggestionIndex = suggestionIndex;
9813                    suggestionInfo.text.replace(0, suggestionInfo.text.length(),
9814                            suggestions[suggestionIndex]);
9815
9816                    mNumberOfSuggestions++;
9817                    if (mNumberOfSuggestions == MAX_NUMBER_SUGGESTIONS) {
9818                        // Also end outer for loop
9819                        spanIndex = nbSpans;
9820                        break;
9821                    }
9822                }
9823            }
9824
9825            for (int i = 0; i < mNumberOfSuggestions; i++) {
9826                highlightTextDifferences(mSuggestionInfos[i], spanUnionStart, spanUnionEnd);
9827            }
9828
9829            // Add to dictionary item if there is a span with the misspelled flag
9830            if (misspelledSpan != null) {
9831                final int misspelledStart = spannable.getSpanStart(misspelledSpan);
9832                final int misspelledEnd = spannable.getSpanEnd(misspelledSpan);
9833                if (misspelledStart >= 0 && misspelledEnd > misspelledStart) {
9834                    SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions];
9835                    suggestionInfo.suggestionSpan = misspelledSpan;
9836                    suggestionInfo.suggestionIndex = ADD_TO_DICTIONARY;
9837                    suggestionInfo.text.replace(0, suggestionInfo.text.length(),
9838                            getContext().getString(com.android.internal.R.string.addToDictionary));
9839                    suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0,
9840                            Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9841
9842                    mNumberOfSuggestions++;
9843                }
9844            }
9845
9846            // Delete item
9847            SuggestionInfo suggestionInfo = mSuggestionInfos[mNumberOfSuggestions];
9848            suggestionInfo.suggestionSpan = null;
9849            suggestionInfo.suggestionIndex = DELETE_TEXT;
9850            suggestionInfo.text.replace(0, suggestionInfo.text.length(),
9851                    getContext().getString(com.android.internal.R.string.deleteText));
9852            suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0, 0,
9853                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9854            mNumberOfSuggestions++;
9855
9856            if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan();
9857            if (underlineColor == 0) {
9858                // Fallback on the default highlight color when the first span does not provide one
9859                mSuggestionRangeSpan.setBackgroundColor(mHighlightColor);
9860            } else {
9861                final float BACKGROUND_TRANSPARENCY = 0.4f;
9862                final int newAlpha = (int) (Color.alpha(underlineColor) * BACKGROUND_TRANSPARENCY);
9863                mSuggestionRangeSpan.setBackgroundColor(
9864                        (underlineColor & 0x00FFFFFF) + (newAlpha << 24));
9865            }
9866            spannable.setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd,
9867                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9868
9869            mSuggestionsAdapter.notifyDataSetChanged();
9870        }
9871
9872        private void highlightTextDifferences(SuggestionInfo suggestionInfo, int unionStart,
9873                int unionEnd) {
9874            final Spannable text = (Spannable) mText;
9875            final int spanStart = text.getSpanStart(suggestionInfo.suggestionSpan);
9876            final int spanEnd = text.getSpanEnd(suggestionInfo.suggestionSpan);
9877
9878            // Adjust the start/end of the suggestion span
9879            suggestionInfo.suggestionStart = spanStart - unionStart;
9880            suggestionInfo.suggestionEnd = suggestionInfo.suggestionStart
9881                    + suggestionInfo.text.length();
9882
9883            suggestionInfo.text.setSpan(suggestionInfo.highlightSpan, 0,
9884                    suggestionInfo.text.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
9885
9886            // Add the text before and after the span.
9887            suggestionInfo.text.insert(0, mText.toString().substring(unionStart, spanStart));
9888            suggestionInfo.text.append(mText.toString().substring(spanEnd, unionEnd));
9889        }
9890
9891        @Override
9892        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
9893            Editable editable = (Editable) mText;
9894            SuggestionInfo suggestionInfo = mSuggestionInfos[position];
9895
9896            if (suggestionInfo.suggestionIndex == DELETE_TEXT) {
9897                final int spanUnionStart = editable.getSpanStart(mSuggestionRangeSpan);
9898                int spanUnionEnd = editable.getSpanEnd(mSuggestionRangeSpan);
9899                if (spanUnionStart >= 0 && spanUnionEnd > spanUnionStart) {
9900                    // Do not leave two adjacent spaces after deletion, or one at beginning of text
9901                    if (spanUnionEnd < editable.length() &&
9902                            Character.isSpaceChar(editable.charAt(spanUnionEnd)) &&
9903                            (spanUnionStart == 0 ||
9904                            Character.isSpaceChar(editable.charAt(spanUnionStart - 1)))) {
9905                        spanUnionEnd = spanUnionEnd + 1;
9906                    }
9907                    deleteText_internal(spanUnionStart, spanUnionEnd);
9908                }
9909                hide();
9910                return;
9911            }
9912
9913            final int spanStart = editable.getSpanStart(suggestionInfo.suggestionSpan);
9914            final int spanEnd = editable.getSpanEnd(suggestionInfo.suggestionSpan);
9915            if (spanStart < 0 || spanEnd <= spanStart) {
9916                // Span has been removed
9917                hide();
9918                return;
9919            }
9920            final String originalText = mText.toString().substring(spanStart, spanEnd);
9921
9922            if (suggestionInfo.suggestionIndex == ADD_TO_DICTIONARY) {
9923                Intent intent = new Intent(Settings.ACTION_USER_DICTIONARY_INSERT);
9924                intent.putExtra("word", originalText);
9925                intent.putExtra("locale", getTextServicesLocale().toString());
9926                intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK);
9927                getContext().startActivity(intent);
9928                // There is no way to know if the word was indeed added. Re-check.
9929                // TODO The ExtractEditText should remove the span in the original text instead
9930                editable.removeSpan(suggestionInfo.suggestionSpan);
9931                updateSpellCheckSpans(spanStart, spanEnd, false);
9932            } else {
9933                // SuggestionSpans are removed by replace: save them before
9934                SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd,
9935                        SuggestionSpan.class);
9936                final int length = suggestionSpans.length;
9937                int[] suggestionSpansStarts = new int[length];
9938                int[] suggestionSpansEnds = new int[length];
9939                int[] suggestionSpansFlags = new int[length];
9940                for (int i = 0; i < length; i++) {
9941                    final SuggestionSpan suggestionSpan = suggestionSpans[i];
9942                    suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan);
9943                    suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan);
9944                    suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan);
9945
9946                    // Remove potential misspelled flags
9947                    int suggestionSpanFlags = suggestionSpan.getFlags();
9948                    if ((suggestionSpanFlags & SuggestionSpan.FLAG_MISSPELLED) > 0) {
9949                        suggestionSpanFlags &= ~SuggestionSpan.FLAG_MISSPELLED;
9950                        suggestionSpanFlags &= ~SuggestionSpan.FLAG_EASY_CORRECT;
9951                        suggestionSpan.setFlags(suggestionSpanFlags);
9952                    }
9953                }
9954
9955                final int suggestionStart = suggestionInfo.suggestionStart;
9956                final int suggestionEnd = suggestionInfo.suggestionEnd;
9957                final String suggestion = suggestionInfo.text.subSequence(
9958                        suggestionStart, suggestionEnd).toString();
9959                replaceText_internal(spanStart, spanEnd, suggestion);
9960
9961                // Notify source IME of the suggestion pick. Do this before swaping texts.
9962                if (!TextUtils.isEmpty(
9963                        suggestionInfo.suggestionSpan.getNotificationTargetClassName())) {
9964                    InputMethodManager imm = InputMethodManager.peekInstance();
9965                    if (imm != null) {
9966                        imm.notifySuggestionPicked(suggestionInfo.suggestionSpan, originalText,
9967                                suggestionInfo.suggestionIndex);
9968                    }
9969                }
9970
9971                // Swap text content between actual text and Suggestion span
9972                String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions();
9973                suggestions[suggestionInfo.suggestionIndex] = originalText;
9974
9975                // Restore previous SuggestionSpans
9976                final int lengthDifference = suggestion.length() - (spanEnd - spanStart);
9977                for (int i = 0; i < length; i++) {
9978                    // Only spans that include the modified region make sense after replacement
9979                    // Spans partially included in the replaced region are removed, there is no
9980                    // way to assign them a valid range after replacement
9981                    if (suggestionSpansStarts[i] <= spanStart &&
9982                            suggestionSpansEnds[i] >= spanEnd) {
9983                        setSpan_internal(suggestionSpans[i], suggestionSpansStarts[i],
9984                                suggestionSpansEnds[i] + lengthDifference, suggestionSpansFlags[i]);
9985                    }
9986                }
9987
9988                // Move cursor at the end of the replaced word
9989                final int newCursorPosition = spanEnd + lengthDifference;
9990                setCursorPosition_internal(newCursorPosition, newCursorPosition);
9991            }
9992
9993            hide();
9994        }
9995    }
9996
9997    /**
9998     * Removes the suggestion spans.
9999     */
10000    CharSequence removeSuggestionSpans(CharSequence text) {
10001       if (text instanceof Spanned) {
10002           Spannable spannable;
10003           if (text instanceof Spannable) {
10004               spannable = (Spannable) text;
10005           } else {
10006               spannable = new SpannableString(text);
10007               text = spannable;
10008           }
10009
10010           SuggestionSpan[] spans = spannable.getSpans(0, text.length(), SuggestionSpan.class);
10011           for (int i = 0; i < spans.length; i++) {
10012               spannable.removeSpan(spans[i]);
10013           }
10014       }
10015       return text;
10016    }
10017
10018    void showSuggestions() {
10019        if (mSuggestionsPopupWindow == null) {
10020            mSuggestionsPopupWindow = new SuggestionsPopupWindow();
10021        }
10022        hideControllers();
10023        mSuggestionsPopupWindow.show();
10024    }
10025
10026    boolean areSuggestionsShown() {
10027        return mSuggestionsPopupWindow != null && mSuggestionsPopupWindow.isShowing();
10028    }
10029
10030    /**
10031     * Return whether or not suggestions are enabled on this TextView. The suggestions are generated
10032     * by the IME or by the spell checker as the user types. This is done by adding
10033     * {@link SuggestionSpan}s to the text.
10034     *
10035     * When suggestions are enabled (default), this list of suggestions will be displayed when the
10036     * user asks for them on these parts of the text. This value depends on the inputType of this
10037     * TextView.
10038     *
10039     * The class of the input type must be {@link InputType#TYPE_CLASS_TEXT}.
10040     *
10041     * In addition, the type variation must be one of
10042     * {@link InputType#TYPE_TEXT_VARIATION_NORMAL},
10043     * {@link InputType#TYPE_TEXT_VARIATION_EMAIL_SUBJECT},
10044     * {@link InputType#TYPE_TEXT_VARIATION_LONG_MESSAGE},
10045     * {@link InputType#TYPE_TEXT_VARIATION_SHORT_MESSAGE} or
10046     * {@link InputType#TYPE_TEXT_VARIATION_WEB_EDIT_TEXT}.
10047     *
10048     * And finally, the {@link InputType#TYPE_TEXT_FLAG_NO_SUGGESTIONS} flag must <i>not</i> be set.
10049     *
10050     * @return true if the suggestions popup window is enabled, based on the inputType.
10051     */
10052    public boolean isSuggestionsEnabled() {
10053        if ((mInputType & InputType.TYPE_MASK_CLASS) != InputType.TYPE_CLASS_TEXT) return false;
10054        if ((mInputType & InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS) > 0) return false;
10055
10056        final int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
10057        return (variation == EditorInfo.TYPE_TEXT_VARIATION_NORMAL ||
10058                variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT ||
10059                variation == EditorInfo.TYPE_TEXT_VARIATION_LONG_MESSAGE ||
10060                variation == EditorInfo.TYPE_TEXT_VARIATION_SHORT_MESSAGE ||
10061                variation == EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT);
10062    }
10063
10064    /**
10065     * If provided, this ActionMode.Callback will be used to create the ActionMode when text
10066     * selection is initiated in this View.
10067     *
10068     * The standard implementation populates the menu with a subset of Select All, Cut, Copy and
10069     * Paste actions, depending on what this View supports.
10070     *
10071     * A custom implementation can add new entries in the default menu in its
10072     * {@link android.view.ActionMode.Callback#onPrepareActionMode(ActionMode, Menu)} method. The
10073     * default actions can also be removed from the menu using {@link Menu#removeItem(int)} and
10074     * passing {@link android.R.id#selectAll}, {@link android.R.id#cut}, {@link android.R.id#copy}
10075     * or {@link android.R.id#paste} ids as parameters.
10076     *
10077     * Returning false from
10078     * {@link android.view.ActionMode.Callback#onCreateActionMode(ActionMode, Menu)} will prevent
10079     * the action mode from being started.
10080     *
10081     * Action click events should be handled by the custom implementation of
10082     * {@link android.view.ActionMode.Callback#onActionItemClicked(ActionMode, MenuItem)}.
10083     *
10084     * Note that text selection mode is not started when a TextView receives focus and the
10085     * {@link android.R.attr#selectAllOnFocus} flag has been set. The content is highlighted in
10086     * that case, to allow for quick replacement.
10087     */
10088    public void setCustomSelectionActionModeCallback(ActionMode.Callback actionModeCallback) {
10089        mCustomSelectionActionModeCallback = actionModeCallback;
10090    }
10091
10092    /**
10093     * Retrieves the value set in {@link #setCustomSelectionActionModeCallback}. Default is null.
10094     *
10095     * @return The current custom selection callback.
10096     */
10097    public ActionMode.Callback getCustomSelectionActionModeCallback() {
10098        return mCustomSelectionActionModeCallback;
10099    }
10100
10101    /**
10102     *
10103     * @return true if the selection mode was actually started.
10104     */
10105    private boolean startSelectionActionMode() {
10106        if (mSelectionActionMode != null) {
10107            // Selection action mode is already started
10108            return false;
10109        }
10110
10111        if (!canSelectText() || !requestFocus()) {
10112            Log.w(LOG_TAG, "TextView does not support text selection. Action mode cancelled.");
10113            return false;
10114        }
10115
10116        if (!hasSelection()) {
10117            // There may already be a selection on device rotation
10118            if (!selectCurrentWord()) {
10119                // No word found under cursor or text selection not permitted.
10120                return false;
10121            }
10122        }
10123
10124        boolean willExtract = extractedTextModeWillBeStarted();
10125
10126        // Do not start the action mode when extracted text will show up full screen, thus
10127        // immediately hiding the newly created action bar, which would be visually distracting.
10128        if (!willExtract) {
10129            ActionMode.Callback actionModeCallback = new SelectionActionModeCallback();
10130            mSelectionActionMode = startActionMode(actionModeCallback);
10131        }
10132
10133        final boolean selectionStarted = mSelectionActionMode != null || willExtract;
10134        if (selectionStarted && !mTextIsSelectable && mSoftInputShownOnFocus) {
10135            // Show the IME to be able to replace text, except when selecting non editable text.
10136            final InputMethodManager imm = InputMethodManager.peekInstance();
10137            if (imm != null) {
10138                imm.showSoftInput(this, 0, null);
10139            }
10140        }
10141
10142        return selectionStarted;
10143    }
10144
10145    private boolean extractedTextModeWillBeStarted() {
10146        if (!(this instanceof ExtractEditText)) {
10147            final InputMethodManager imm = InputMethodManager.peekInstance();
10148            return  imm != null && imm.isFullscreenMode();
10149        }
10150        return false;
10151    }
10152
10153    private void stopSelectionActionMode() {
10154        if (mSelectionActionMode != null) {
10155            // This will hide the mSelectionModifierCursorController
10156            mSelectionActionMode.finish();
10157        }
10158    }
10159
10160    /**
10161     * Paste clipboard content between min and max positions.
10162     */
10163    private void paste(int min, int max) {
10164        ClipboardManager clipboard =
10165            (ClipboardManager) getContext().getSystemService(Context.CLIPBOARD_SERVICE);
10166        ClipData clip = clipboard.getPrimaryClip();
10167        if (clip != null) {
10168            boolean didFirst = false;
10169            for (int i=0; i<clip.getItemCount(); i++) {
10170                CharSequence paste = clip.getItemAt(i).coerceToText(getContext());
10171                if (paste != null) {
10172                    if (!didFirst) {
10173                        long minMax = prepareSpacesAroundPaste(min, max, paste);
10174                        min = extractRangeStartFromLong(minMax);
10175                        max = extractRangeEndFromLong(minMax);
10176                        Selection.setSelection((Spannable) mText, max);
10177                        ((Editable) mText).replace(min, max, paste);
10178                        didFirst = true;
10179                    } else {
10180                        ((Editable) mText).insert(getSelectionEnd(), "\n");
10181                        ((Editable) mText).insert(getSelectionEnd(), paste);
10182                    }
10183                }
10184            }
10185            stopSelectionActionMode();
10186            sLastCutOrCopyTime = 0;
10187        }
10188    }
10189
10190    private void setPrimaryClip(ClipData clip) {
10191        ClipboardManager clipboard = (ClipboardManager) getContext().
10192                getSystemService(Context.CLIPBOARD_SERVICE);
10193        clipboard.setPrimaryClip(clip);
10194        sLastCutOrCopyTime = SystemClock.uptimeMillis();
10195    }
10196
10197    /**
10198     * An ActionMode Callback class that is used to provide actions while in text selection mode.
10199     *
10200     * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending
10201     * on which of these this TextView supports.
10202     */
10203    private class SelectionActionModeCallback implements ActionMode.Callback {
10204
10205        @Override
10206        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
10207            TypedArray styledAttributes = mContext.obtainStyledAttributes(
10208                    com.android.internal.R.styleable.SelectionModeDrawables);
10209
10210            boolean allowText = getContext().getResources().getBoolean(
10211                    com.android.internal.R.bool.config_allowActionMenuItemTextWithIcon);
10212
10213            mode.setTitle(allowText ?
10214                    mContext.getString(com.android.internal.R.string.textSelectionCABTitle) : null);
10215            mode.setSubtitle(null);
10216
10217            int selectAllIconId = 0; // No icon by default
10218            if (!allowText) {
10219                // Provide an icon, text will not be displayed on smaller screens.
10220                selectAllIconId = styledAttributes.getResourceId(
10221                        R.styleable.SelectionModeDrawables_actionModeSelectAllDrawable, 0);
10222            }
10223
10224            menu.add(0, ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll).
10225                    setIcon(selectAllIconId).
10226                    setAlphabeticShortcut('a').
10227                    setShowAsAction(
10228                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10229
10230            if (canCut()) {
10231                menu.add(0, ID_CUT, 0, com.android.internal.R.string.cut).
10232                    setIcon(styledAttributes.getResourceId(
10233                            R.styleable.SelectionModeDrawables_actionModeCutDrawable, 0)).
10234                    setAlphabeticShortcut('x').
10235                    setShowAsAction(
10236                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10237            }
10238
10239            if (canCopy()) {
10240                menu.add(0, ID_COPY, 0, com.android.internal.R.string.copy).
10241                    setIcon(styledAttributes.getResourceId(
10242                            R.styleable.SelectionModeDrawables_actionModeCopyDrawable, 0)).
10243                    setAlphabeticShortcut('c').
10244                    setShowAsAction(
10245                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10246            }
10247
10248            if (canPaste()) {
10249                menu.add(0, ID_PASTE, 0, com.android.internal.R.string.paste).
10250                        setIcon(styledAttributes.getResourceId(
10251                                R.styleable.SelectionModeDrawables_actionModePasteDrawable, 0)).
10252                        setAlphabeticShortcut('v').
10253                        setShowAsAction(
10254                                MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
10255            }
10256
10257            styledAttributes.recycle();
10258
10259            if (mCustomSelectionActionModeCallback != null) {
10260                if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) {
10261                    // The custom mode can choose to cancel the action mode
10262                    return false;
10263                }
10264            }
10265
10266            if (menu.hasVisibleItems() || mode.getCustomView() != null) {
10267                getSelectionController().show();
10268                return true;
10269            } else {
10270                return false;
10271            }
10272        }
10273
10274        @Override
10275        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
10276            if (mCustomSelectionActionModeCallback != null) {
10277                return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu);
10278            }
10279            return true;
10280        }
10281
10282        @Override
10283        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
10284            if (mCustomSelectionActionModeCallback != null &&
10285                 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) {
10286                return true;
10287            }
10288            return onTextContextMenuItem(item.getItemId());
10289        }
10290
10291        @Override
10292        public void onDestroyActionMode(ActionMode mode) {
10293            if (mCustomSelectionActionModeCallback != null) {
10294                mCustomSelectionActionModeCallback.onDestroyActionMode(mode);
10295            }
10296            Selection.setSelection((Spannable) mText, getSelectionEnd());
10297
10298            if (mSelectionModifierCursorController != null) {
10299                mSelectionModifierCursorController.hide();
10300            }
10301
10302            mSelectionActionMode = null;
10303        }
10304    }
10305
10306    private class ActionPopupWindow extends PinnedPopupWindow implements OnClickListener {
10307        private static final int POPUP_TEXT_LAYOUT =
10308                com.android.internal.R.layout.text_edit_action_popup_text;
10309        private TextView mPasteTextView;
10310        private TextView mReplaceTextView;
10311
10312        @Override
10313        protected void createPopupWindow() {
10314            mPopupWindow = new PopupWindow(TextView.this.mContext, null,
10315                    com.android.internal.R.attr.textSelectHandleWindowStyle);
10316            mPopupWindow.setClippingEnabled(true);
10317        }
10318
10319        @Override
10320        protected void initContentView() {
10321            LinearLayout linearLayout = new LinearLayout(TextView.this.getContext());
10322            linearLayout.setOrientation(LinearLayout.HORIZONTAL);
10323            mContentView = linearLayout;
10324            mContentView.setBackgroundResource(
10325                    com.android.internal.R.drawable.text_edit_paste_window);
10326
10327            LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
10328                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
10329
10330            LayoutParams wrapContent = new LayoutParams(
10331                    ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
10332
10333            mPasteTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
10334            mPasteTextView.setLayoutParams(wrapContent);
10335            mContentView.addView(mPasteTextView);
10336            mPasteTextView.setText(com.android.internal.R.string.paste);
10337            mPasteTextView.setOnClickListener(this);
10338
10339            mReplaceTextView = (TextView) inflater.inflate(POPUP_TEXT_LAYOUT, null);
10340            mReplaceTextView.setLayoutParams(wrapContent);
10341            mContentView.addView(mReplaceTextView);
10342            mReplaceTextView.setText(com.android.internal.R.string.replace);
10343            mReplaceTextView.setOnClickListener(this);
10344        }
10345
10346        @Override
10347        public void show() {
10348            boolean canPaste = canPaste();
10349            boolean canSuggest = isSuggestionsEnabled() && isCursorInsideSuggestionSpan();
10350            mPasteTextView.setVisibility(canPaste ? View.VISIBLE : View.GONE);
10351            mReplaceTextView.setVisibility(canSuggest ? View.VISIBLE : View.GONE);
10352
10353            if (!canPaste && !canSuggest) return;
10354
10355            super.show();
10356        }
10357
10358        @Override
10359        public void onClick(View view) {
10360            if (view == mPasteTextView && canPaste()) {
10361                onTextContextMenuItem(ID_PASTE);
10362                hide();
10363            } else if (view == mReplaceTextView) {
10364                final int middle = (getSelectionStart() + getSelectionEnd()) / 2;
10365                stopSelectionActionMode();
10366                Selection.setSelection((Spannable) mText, middle);
10367                showSuggestions();
10368            }
10369        }
10370
10371        @Override
10372        protected int getTextOffset() {
10373            return (getSelectionStart() + getSelectionEnd()) / 2;
10374        }
10375
10376        @Override
10377        protected int getVerticalLocalPosition(int line) {
10378            return mLayout.getLineTop(line) - mContentView.getMeasuredHeight();
10379        }
10380
10381        @Override
10382        protected int clipVertically(int positionY) {
10383            if (positionY < 0) {
10384                final int offset = getTextOffset();
10385                final int line = mLayout.getLineForOffset(offset);
10386                positionY += mLayout.getLineBottom(line) - mLayout.getLineTop(line);
10387                positionY += mContentView.getMeasuredHeight();
10388
10389                // Assumes insertion and selection handles share the same height
10390                final Drawable handle = mContext.getResources().getDrawable(mTextSelectHandleRes);
10391                positionY += handle.getIntrinsicHeight();
10392            }
10393
10394            return positionY;
10395        }
10396    }
10397
10398    private abstract class HandleView extends View implements TextViewPositionListener {
10399        protected Drawable mDrawable;
10400        protected Drawable mDrawableLtr;
10401        protected Drawable mDrawableRtl;
10402        private final PopupWindow mContainer;
10403        // Position with respect to the parent TextView
10404        private int mPositionX, mPositionY;
10405        private boolean mIsDragging;
10406        // Offset from touch position to mPosition
10407        private float mTouchToWindowOffsetX, mTouchToWindowOffsetY;
10408        protected int mHotspotX;
10409        // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up
10410        private float mTouchOffsetY;
10411        // Where the touch position should be on the handle to ensure a maximum cursor visibility
10412        private float mIdealVerticalOffset;
10413        // Parent's (TextView) previous position in window
10414        private int mLastParentX, mLastParentY;
10415        // Transient action popup window for Paste and Replace actions
10416        protected ActionPopupWindow mActionPopupWindow;
10417        // Previous text character offset
10418        private int mPreviousOffset = -1;
10419        // Previous text character offset
10420        private boolean mPositionHasChanged = true;
10421        // Used to delay the appearance of the action popup window
10422        private Runnable mActionPopupShower;
10423
10424        public HandleView(Drawable drawableLtr, Drawable drawableRtl) {
10425            super(TextView.this.mContext);
10426            mContainer = new PopupWindow(TextView.this.mContext, null,
10427                    com.android.internal.R.attr.textSelectHandleWindowStyle);
10428            mContainer.setSplitTouchEnabled(true);
10429            mContainer.setClippingEnabled(false);
10430            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
10431            mContainer.setContentView(this);
10432
10433            mDrawableLtr = drawableLtr;
10434            mDrawableRtl = drawableRtl;
10435
10436            updateDrawable();
10437
10438            final int handleHeight = mDrawable.getIntrinsicHeight();
10439            mTouchOffsetY = -0.3f * handleHeight;
10440            mIdealVerticalOffset = 0.7f * handleHeight;
10441        }
10442
10443        protected void updateDrawable() {
10444            final int offset = getCurrentCursorOffset();
10445            final boolean isRtlCharAtOffset = mLayout.isRtlCharAt(offset);
10446            mDrawable = isRtlCharAtOffset ? mDrawableRtl : mDrawableLtr;
10447            mHotspotX = getHotspotX(mDrawable, isRtlCharAtOffset);
10448        }
10449
10450        protected abstract int getHotspotX(Drawable drawable, boolean isRtlRun);
10451
10452        // Touch-up filter: number of previous positions remembered
10453        private static final int HISTORY_SIZE = 5;
10454        private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150;
10455        private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350;
10456        private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE];
10457        private final int[] mPreviousOffsets = new int[HISTORY_SIZE];
10458        private int mPreviousOffsetIndex = 0;
10459        private int mNumberPreviousOffsets = 0;
10460
10461        private void startTouchUpFilter(int offset) {
10462            mNumberPreviousOffsets = 0;
10463            addPositionToTouchUpFilter(offset);
10464        }
10465
10466        private void addPositionToTouchUpFilter(int offset) {
10467            mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE;
10468            mPreviousOffsets[mPreviousOffsetIndex] = offset;
10469            mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis();
10470            mNumberPreviousOffsets++;
10471        }
10472
10473        private void filterOnTouchUp() {
10474            final long now = SystemClock.uptimeMillis();
10475            int i = 0;
10476            int index = mPreviousOffsetIndex;
10477            final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE);
10478            while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) {
10479                i++;
10480                index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE;
10481            }
10482
10483            if (i > 0 && i < iMax &&
10484                    (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) {
10485                positionAtCursorOffset(mPreviousOffsets[index], false);
10486            }
10487        }
10488
10489        public boolean offsetHasBeenChanged() {
10490            return mNumberPreviousOffsets > 1;
10491        }
10492
10493        @Override
10494        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
10495            setMeasuredDimension(mDrawable.getIntrinsicWidth(), mDrawable.getIntrinsicHeight());
10496        }
10497
10498        public void show() {
10499            if (isShowing()) return;
10500
10501            getPositionListener().addSubscriber(this, true /* local position may change */);
10502
10503            // Make sure the offset is always considered new, even when focusing at same position
10504            mPreviousOffset = -1;
10505            positionAtCursorOffset(getCurrentCursorOffset(), false);
10506
10507            hideActionPopupWindow();
10508        }
10509
10510        protected void dismiss() {
10511            mIsDragging = false;
10512            mContainer.dismiss();
10513            onDetached();
10514        }
10515
10516        public void hide() {
10517            dismiss();
10518
10519            TextView.this.getPositionListener().removeSubscriber(this);
10520        }
10521
10522        void showActionPopupWindow(int delay) {
10523            if (mActionPopupWindow == null) {
10524                mActionPopupWindow = new ActionPopupWindow();
10525            }
10526            if (mActionPopupShower == null) {
10527                mActionPopupShower = new Runnable() {
10528                    public void run() {
10529                        mActionPopupWindow.show();
10530                    }
10531                };
10532            } else {
10533                TextView.this.removeCallbacks(mActionPopupShower);
10534            }
10535            TextView.this.postDelayed(mActionPopupShower, delay);
10536        }
10537
10538        protected void hideActionPopupWindow() {
10539            if (mActionPopupShower != null) {
10540                TextView.this.removeCallbacks(mActionPopupShower);
10541            }
10542            if (mActionPopupWindow != null) {
10543                mActionPopupWindow.hide();
10544            }
10545        }
10546
10547        public boolean isShowing() {
10548            return mContainer.isShowing();
10549        }
10550
10551        private boolean isVisible() {
10552            // Always show a dragging handle.
10553            if (mIsDragging) {
10554                return true;
10555            }
10556
10557            if (isInBatchEditMode()) {
10558                return false;
10559            }
10560
10561            return TextView.this.isPositionVisible(mPositionX + mHotspotX, mPositionY);
10562        }
10563
10564        public abstract int getCurrentCursorOffset();
10565
10566        protected abstract void updateSelection(int offset);
10567
10568        public abstract void updatePosition(float x, float y);
10569
10570        protected void positionAtCursorOffset(int offset, boolean parentScrolled) {
10571            // A HandleView relies on the layout, which may be nulled by external methods
10572            if (mLayout == null) {
10573                // Will update controllers' state, hiding them and stopping selection mode if needed
10574                prepareCursorControllers();
10575                return;
10576            }
10577
10578            if (offset != mPreviousOffset || parentScrolled) {
10579                updateSelection(offset);
10580                addPositionToTouchUpFilter(offset);
10581                final int line = mLayout.getLineForOffset(offset);
10582
10583                mPositionX = (int) (mLayout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX);
10584                mPositionY = mLayout.getLineBottom(line);
10585
10586                // Take TextView's padding and scroll into account.
10587                mPositionX += viewportToContentHorizontalOffset();
10588                mPositionY += viewportToContentVerticalOffset();
10589
10590                mPreviousOffset = offset;
10591                mPositionHasChanged = true;
10592            }
10593        }
10594
10595        public void updatePosition(int parentPositionX, int parentPositionY,
10596                boolean parentPositionChanged, boolean parentScrolled) {
10597            positionAtCursorOffset(getCurrentCursorOffset(), parentScrolled);
10598            if (parentPositionChanged || mPositionHasChanged) {
10599                if (mIsDragging) {
10600                    // Update touchToWindow offset in case of parent scrolling while dragging
10601                    if (parentPositionX != mLastParentX || parentPositionY != mLastParentY) {
10602                        mTouchToWindowOffsetX += parentPositionX - mLastParentX;
10603                        mTouchToWindowOffsetY += parentPositionY - mLastParentY;
10604                        mLastParentX = parentPositionX;
10605                        mLastParentY = parentPositionY;
10606                    }
10607
10608                    onHandleMoved();
10609                }
10610
10611                if (isVisible()) {
10612                    final int positionX = parentPositionX + mPositionX;
10613                    final int positionY = parentPositionY + mPositionY;
10614                    if (isShowing()) {
10615                        mContainer.update(positionX, positionY, -1, -1);
10616                    } else {
10617                        mContainer.showAtLocation(TextView.this, Gravity.NO_GRAVITY,
10618                                positionX, positionY);
10619                    }
10620                } else {
10621                    if (isShowing()) {
10622                        dismiss();
10623                    }
10624                }
10625
10626                mPositionHasChanged = false;
10627            }
10628        }
10629
10630        @Override
10631        protected void onDraw(Canvas c) {
10632            mDrawable.setBounds(0, 0, mRight - mLeft, mBottom - mTop);
10633            mDrawable.draw(c);
10634        }
10635
10636        @Override
10637        public boolean onTouchEvent(MotionEvent ev) {
10638            switch (ev.getActionMasked()) {
10639                case MotionEvent.ACTION_DOWN: {
10640                    startTouchUpFilter(getCurrentCursorOffset());
10641                    mTouchToWindowOffsetX = ev.getRawX() - mPositionX;
10642                    mTouchToWindowOffsetY = ev.getRawY() - mPositionY;
10643
10644                    final PositionListener positionListener = getPositionListener();
10645                    mLastParentX = positionListener.getPositionX();
10646                    mLastParentY = positionListener.getPositionY();
10647                    mIsDragging = true;
10648                    break;
10649                }
10650
10651                case MotionEvent.ACTION_MOVE: {
10652                    final float rawX = ev.getRawX();
10653                    final float rawY = ev.getRawY();
10654
10655                    // Vertical hysteresis: vertical down movement tends to snap to ideal offset
10656                    final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY;
10657                    final float currentVerticalOffset = rawY - mPositionY - mLastParentY;
10658                    float newVerticalOffset;
10659                    if (previousVerticalOffset < mIdealVerticalOffset) {
10660                        newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset);
10661                        newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset);
10662                    } else {
10663                        newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset);
10664                        newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset);
10665                    }
10666                    mTouchToWindowOffsetY = newVerticalOffset + mLastParentY;
10667
10668                    final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX;
10669                    final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY;
10670
10671                    updatePosition(newPosX, newPosY);
10672                    break;
10673                }
10674
10675                case MotionEvent.ACTION_UP:
10676                    filterOnTouchUp();
10677                    mIsDragging = false;
10678                    break;
10679
10680                case MotionEvent.ACTION_CANCEL:
10681                    mIsDragging = false;
10682                    break;
10683            }
10684            return true;
10685        }
10686
10687        public boolean isDragging() {
10688            return mIsDragging;
10689        }
10690
10691        void onHandleMoved() {
10692            hideActionPopupWindow();
10693        }
10694
10695        public void onDetached() {
10696            hideActionPopupWindow();
10697        }
10698    }
10699
10700    private class InsertionHandleView extends HandleView {
10701        private static final int DELAY_BEFORE_HANDLE_FADES_OUT = 4000;
10702        private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds
10703
10704        // Used to detect taps on the insertion handle, which will affect the ActionPopupWindow
10705        private float mDownPositionX, mDownPositionY;
10706        private Runnable mHider;
10707
10708        public InsertionHandleView(Drawable drawable) {
10709            super(drawable, drawable);
10710        }
10711
10712        @Override
10713        public void show() {
10714            super.show();
10715
10716            final long durationSinceCutOrCopy = SystemClock.uptimeMillis() - sLastCutOrCopyTime;
10717            if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) {
10718                showActionPopupWindow(0);
10719            }
10720
10721            hideAfterDelay();
10722        }
10723
10724        public void showWithActionPopup() {
10725            show();
10726            showActionPopupWindow(0);
10727        }
10728
10729        private void hideAfterDelay() {
10730            removeHiderCallback();
10731            if (mHider == null) {
10732                mHider = new Runnable() {
10733                    public void run() {
10734                        hide();
10735                    }
10736                };
10737            }
10738            TextView.this.postDelayed(mHider, DELAY_BEFORE_HANDLE_FADES_OUT);
10739        }
10740
10741        private void removeHiderCallback() {
10742            if (mHider != null) {
10743                TextView.this.removeCallbacks(mHider);
10744            }
10745        }
10746
10747        @Override
10748        protected int getHotspotX(Drawable drawable, boolean isRtlRun) {
10749            return drawable.getIntrinsicWidth() / 2;
10750        }
10751
10752        @Override
10753        public boolean onTouchEvent(MotionEvent ev) {
10754            final boolean result = super.onTouchEvent(ev);
10755
10756            switch (ev.getActionMasked()) {
10757                case MotionEvent.ACTION_DOWN:
10758                    mDownPositionX = ev.getRawX();
10759                    mDownPositionY = ev.getRawY();
10760                    break;
10761
10762                case MotionEvent.ACTION_UP:
10763                    if (!offsetHasBeenChanged()) {
10764                        final float deltaX = mDownPositionX - ev.getRawX();
10765                        final float deltaY = mDownPositionY - ev.getRawY();
10766                        final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
10767                        if (distanceSquared < mSquaredTouchSlopDistance) {
10768                            if (mActionPopupWindow != null && mActionPopupWindow.isShowing()) {
10769                                // Tapping on the handle dismisses the displayed action popup
10770                                mActionPopupWindow.hide();
10771                            } else {
10772                                showWithActionPopup();
10773                            }
10774                        }
10775                    }
10776                    hideAfterDelay();
10777                    break;
10778
10779                case MotionEvent.ACTION_CANCEL:
10780                    hideAfterDelay();
10781                    break;
10782
10783                default:
10784                    break;
10785            }
10786
10787            return result;
10788        }
10789
10790        @Override
10791        public int getCurrentCursorOffset() {
10792            return TextView.this.getSelectionStart();
10793        }
10794
10795        @Override
10796        public void updateSelection(int offset) {
10797            Selection.setSelection((Spannable) mText, offset);
10798        }
10799
10800        @Override
10801        public void updatePosition(float x, float y) {
10802            positionAtCursorOffset(getOffsetForPosition(x, y), false);
10803        }
10804
10805        @Override
10806        void onHandleMoved() {
10807            super.onHandleMoved();
10808            removeHiderCallback();
10809        }
10810
10811        @Override
10812        public void onDetached() {
10813            super.onDetached();
10814            removeHiderCallback();
10815        }
10816    }
10817
10818    private class SelectionStartHandleView extends HandleView {
10819
10820        public SelectionStartHandleView(Drawable drawableLtr, Drawable drawableRtl) {
10821            super(drawableLtr, drawableRtl);
10822        }
10823
10824        @Override
10825        protected int getHotspotX(Drawable drawable, boolean isRtlRun) {
10826            if (isRtlRun) {
10827                return drawable.getIntrinsicWidth() / 4;
10828            } else {
10829                return (drawable.getIntrinsicWidth() * 3) / 4;
10830            }
10831        }
10832
10833        @Override
10834        public int getCurrentCursorOffset() {
10835            return TextView.this.getSelectionStart();
10836        }
10837
10838        @Override
10839        public void updateSelection(int offset) {
10840            Selection.setSelection((Spannable) mText, offset, getSelectionEnd());
10841            updateDrawable();
10842        }
10843
10844        @Override
10845        public void updatePosition(float x, float y) {
10846            int offset = getOffsetForPosition(x, y);
10847
10848            // Handles can not cross and selection is at least one character
10849            final int selectionEnd = getSelectionEnd();
10850            if (offset >= selectionEnd) offset = Math.max(0, selectionEnd - 1);
10851
10852            positionAtCursorOffset(offset, false);
10853        }
10854
10855        public ActionPopupWindow getActionPopupWindow() {
10856            return mActionPopupWindow;
10857        }
10858    }
10859
10860    private class SelectionEndHandleView extends HandleView {
10861
10862        public SelectionEndHandleView(Drawable drawableLtr, Drawable drawableRtl) {
10863            super(drawableLtr, drawableRtl);
10864        }
10865
10866        @Override
10867        protected int getHotspotX(Drawable drawable, boolean isRtlRun) {
10868            if (isRtlRun) {
10869                return (drawable.getIntrinsicWidth() * 3) / 4;
10870            } else {
10871                return drawable.getIntrinsicWidth() / 4;
10872            }
10873        }
10874
10875        @Override
10876        public int getCurrentCursorOffset() {
10877            return TextView.this.getSelectionEnd();
10878        }
10879
10880        @Override
10881        public void updateSelection(int offset) {
10882            Selection.setSelection((Spannable) mText, getSelectionStart(), offset);
10883            updateDrawable();
10884        }
10885
10886        @Override
10887        public void updatePosition(float x, float y) {
10888            int offset = getOffsetForPosition(x, y);
10889
10890            // Handles can not cross and selection is at least one character
10891            final int selectionStart = getSelectionStart();
10892            if (offset <= selectionStart) offset = Math.min(selectionStart + 1, mText.length());
10893
10894            positionAtCursorOffset(offset, false);
10895        }
10896
10897        public void setActionPopupWindow(ActionPopupWindow actionPopupWindow) {
10898            mActionPopupWindow = actionPopupWindow;
10899        }
10900    }
10901
10902    /**
10903     * A CursorController instance can be used to control a cursor in the text.
10904     * It is not used outside of {@link TextView}.
10905     * @hide
10906     */
10907    private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener {
10908        /**
10909         * Makes the cursor controller visible on screen. Will be drawn by {@link #draw(Canvas)}.
10910         * See also {@link #hide()}.
10911         */
10912        public void show();
10913
10914        /**
10915         * Hide the cursor controller from screen.
10916         * See also {@link #show()}.
10917         */
10918        public void hide();
10919
10920        /**
10921         * Called when the view is detached from window. Perform house keeping task, such as
10922         * stopping Runnable thread that would otherwise keep a reference on the context, thus
10923         * preventing the activity from being recycled.
10924         */
10925        public void onDetached();
10926    }
10927
10928    private class InsertionPointCursorController implements CursorController {
10929        private InsertionHandleView mHandle;
10930
10931        public void show() {
10932            getHandle().show();
10933        }
10934
10935        public void showWithActionPopup() {
10936            getHandle().showWithActionPopup();
10937        }
10938
10939        public void hide() {
10940            if (mHandle != null) {
10941                mHandle.hide();
10942            }
10943        }
10944
10945        public void onTouchModeChanged(boolean isInTouchMode) {
10946            if (!isInTouchMode) {
10947                hide();
10948            }
10949        }
10950
10951        private InsertionHandleView getHandle() {
10952            if (mSelectHandleCenter == null) {
10953                mSelectHandleCenter = mContext.getResources().getDrawable(
10954                        mTextSelectHandleRes);
10955            }
10956            if (mHandle == null) {
10957                mHandle = new InsertionHandleView(mSelectHandleCenter);
10958            }
10959            return mHandle;
10960        }
10961
10962        @Override
10963        public void onDetached() {
10964            final ViewTreeObserver observer = getViewTreeObserver();
10965            observer.removeOnTouchModeChangeListener(this);
10966
10967            if (mHandle != null) mHandle.onDetached();
10968        }
10969    }
10970
10971    private class SelectionModifierCursorController implements CursorController {
10972        private static final int DELAY_BEFORE_REPLACE_ACTION = 200; // milliseconds
10973        // The cursor controller handles, lazily created when shown.
10974        private SelectionStartHandleView mStartHandle;
10975        private SelectionEndHandleView mEndHandle;
10976        // The offsets of that last touch down event. Remembered to start selection there.
10977        private int mMinTouchOffset, mMaxTouchOffset;
10978
10979        // Double tap detection
10980        private long mPreviousTapUpTime = 0;
10981        private float mPreviousTapPositionX, mPreviousTapPositionY;
10982
10983        SelectionModifierCursorController() {
10984            resetTouchOffsets();
10985        }
10986
10987        public void show() {
10988            if (isInBatchEditMode()) {
10989                return;
10990            }
10991            initDrawables();
10992            initHandles();
10993            hideInsertionPointCursorController();
10994        }
10995
10996        private void initDrawables() {
10997            if (mSelectHandleLeft == null) {
10998                mSelectHandleLeft = mContext.getResources().getDrawable(
10999                        mTextSelectHandleLeftRes);
11000            }
11001            if (mSelectHandleRight == null) {
11002                mSelectHandleRight = mContext.getResources().getDrawable(
11003                        mTextSelectHandleRightRes);
11004            }
11005        }
11006
11007        private void initHandles() {
11008            // Lazy object creation has to be done before updatePosition() is called.
11009            if (mStartHandle == null) {
11010                mStartHandle = new SelectionStartHandleView(mSelectHandleLeft, mSelectHandleRight);
11011            }
11012            if (mEndHandle == null) {
11013                mEndHandle = new SelectionEndHandleView(mSelectHandleRight, mSelectHandleLeft);
11014            }
11015
11016            mStartHandle.show();
11017            mEndHandle.show();
11018
11019            // Make sure both left and right handles share the same ActionPopupWindow (so that
11020            // moving any of the handles hides the action popup).
11021            mStartHandle.showActionPopupWindow(DELAY_BEFORE_REPLACE_ACTION);
11022            mEndHandle.setActionPopupWindow(mStartHandle.getActionPopupWindow());
11023
11024            hideInsertionPointCursorController();
11025        }
11026
11027        public void hide() {
11028            if (mStartHandle != null) mStartHandle.hide();
11029            if (mEndHandle != null) mEndHandle.hide();
11030        }
11031
11032        public void onTouchEvent(MotionEvent event) {
11033            // This is done even when the View does not have focus, so that long presses can start
11034            // selection and tap can move cursor from this tap position.
11035            switch (event.getActionMasked()) {
11036                case MotionEvent.ACTION_DOWN:
11037                    final float x = event.getX();
11038                    final float y = event.getY();
11039
11040                    // Remember finger down position, to be able to start selection from there
11041                    mMinTouchOffset = mMaxTouchOffset = getOffsetForPosition(x, y);
11042
11043                    // Double tap detection
11044                    long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime;
11045                    if (duration <= ViewConfiguration.getDoubleTapTimeout() &&
11046                            isPositionOnText(x, y)) {
11047                        final float deltaX = x - mPreviousTapPositionX;
11048                        final float deltaY = y - mPreviousTapPositionY;
11049                        final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
11050                        if (distanceSquared < mSquaredTouchSlopDistance) {
11051                            startSelectionActionMode();
11052                            mDiscardNextActionUp = true;
11053                        }
11054                    }
11055
11056                    mPreviousTapPositionX = x;
11057                    mPreviousTapPositionY = y;
11058                    break;
11059
11060                case MotionEvent.ACTION_POINTER_DOWN:
11061                case MotionEvent.ACTION_POINTER_UP:
11062                    // Handle multi-point gestures. Keep min and max offset positions.
11063                    // Only activated for devices that correctly handle multi-touch.
11064                    if (mContext.getPackageManager().hasSystemFeature(
11065                            PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) {
11066                        updateMinAndMaxOffsets(event);
11067                    }
11068                    break;
11069
11070                case MotionEvent.ACTION_UP:
11071                    mPreviousTapUpTime = SystemClock.uptimeMillis();
11072                    break;
11073            }
11074        }
11075
11076        /**
11077         * @param event
11078         */
11079        private void updateMinAndMaxOffsets(MotionEvent event) {
11080            int pointerCount = event.getPointerCount();
11081            for (int index = 0; index < pointerCount; index++) {
11082                int offset = getOffsetForPosition(event.getX(index), event.getY(index));
11083                if (offset < mMinTouchOffset) mMinTouchOffset = offset;
11084                if (offset > mMaxTouchOffset) mMaxTouchOffset = offset;
11085            }
11086        }
11087
11088        public int getMinTouchOffset() {
11089            return mMinTouchOffset;
11090        }
11091
11092        public int getMaxTouchOffset() {
11093            return mMaxTouchOffset;
11094        }
11095
11096        public void resetTouchOffsets() {
11097            mMinTouchOffset = mMaxTouchOffset = -1;
11098        }
11099
11100        /**
11101         * @return true iff this controller is currently used to move the selection start.
11102         */
11103        public boolean isSelectionStartDragged() {
11104            return mStartHandle != null && mStartHandle.isDragging();
11105        }
11106
11107        public void onTouchModeChanged(boolean isInTouchMode) {
11108            if (!isInTouchMode) {
11109                hide();
11110            }
11111        }
11112
11113        @Override
11114        public void onDetached() {
11115            final ViewTreeObserver observer = getViewTreeObserver();
11116            observer.removeOnTouchModeChangeListener(this);
11117
11118            if (mStartHandle != null) mStartHandle.onDetached();
11119            if (mEndHandle != null) mEndHandle.onDetached();
11120        }
11121    }
11122
11123    private void hideInsertionPointCursorController() {
11124        // No need to create the controller to hide it.
11125        if (mInsertionPointCursorController != null) {
11126            mInsertionPointCursorController.hide();
11127        }
11128    }
11129
11130    /**
11131     * Hides the insertion controller and stops text selection mode, hiding the selection controller
11132     */
11133    private void hideControllers() {
11134        hideCursorControllers();
11135        hideSpanControllers();
11136    }
11137
11138    private void hideSpanControllers() {
11139        if (mChangeWatcher != null) {
11140            mChangeWatcher.hideControllers();
11141        }
11142    }
11143
11144    private void hideCursorControllers() {
11145        if (mSuggestionsPopupWindow != null && !mSuggestionsPopupWindow.isShowingUp()) {
11146            // Should be done before hide insertion point controller since it triggers a show of it
11147            mSuggestionsPopupWindow.hide();
11148        }
11149        hideInsertionPointCursorController();
11150        stopSelectionActionMode();
11151    }
11152
11153    /**
11154     * Get the character offset closest to the specified absolute position. A typical use case is to
11155     * pass the result of {@link MotionEvent#getX()} and {@link MotionEvent#getY()} to this method.
11156     *
11157     * @param x The horizontal absolute position of a point on screen
11158     * @param y The vertical absolute position of a point on screen
11159     * @return the character offset for the character whose position is closest to the specified
11160     *  position. Returns -1 if there is no layout.
11161     */
11162    public int getOffsetForPosition(float x, float y) {
11163        if (getLayout() == null) return -1;
11164        final int line = getLineAtCoordinate(y);
11165        final int offset = getOffsetAtCoordinate(line, x);
11166        return offset;
11167    }
11168
11169    private float convertToLocalHorizontalCoordinate(float x) {
11170        x -= getTotalPaddingLeft();
11171        // Clamp the position to inside of the view.
11172        x = Math.max(0.0f, x);
11173        x = Math.min(getWidth() - getTotalPaddingRight() - 1, x);
11174        x += getScrollX();
11175        return x;
11176    }
11177
11178    private int getLineAtCoordinate(float y) {
11179        y -= getTotalPaddingTop();
11180        // Clamp the position to inside of the view.
11181        y = Math.max(0.0f, y);
11182        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
11183        y += getScrollY();
11184        return getLayout().getLineForVertical((int) y);
11185    }
11186
11187    private int getOffsetAtCoordinate(int line, float x) {
11188        x = convertToLocalHorizontalCoordinate(x);
11189        return getLayout().getOffsetForHorizontal(line, x);
11190    }
11191
11192    /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed
11193     * in the view. Returns false when the position is in the empty space of left/right of text.
11194     */
11195    private boolean isPositionOnText(float x, float y) {
11196        if (getLayout() == null) return false;
11197
11198        final int line = getLineAtCoordinate(y);
11199        x = convertToLocalHorizontalCoordinate(x);
11200
11201        if (x < getLayout().getLineLeft(line)) return false;
11202        if (x > getLayout().getLineRight(line)) return false;
11203        return true;
11204    }
11205
11206    @Override
11207    public boolean onDragEvent(DragEvent event) {
11208        switch (event.getAction()) {
11209            case DragEvent.ACTION_DRAG_STARTED:
11210                return hasInsertionController();
11211
11212            case DragEvent.ACTION_DRAG_ENTERED:
11213                TextView.this.requestFocus();
11214                return true;
11215
11216            case DragEvent.ACTION_DRAG_LOCATION:
11217                final int offset = getOffsetForPosition(event.getX(), event.getY());
11218                Selection.setSelection((Spannable)mText, offset);
11219                return true;
11220
11221            case DragEvent.ACTION_DROP:
11222                onDrop(event);
11223                return true;
11224
11225            case DragEvent.ACTION_DRAG_ENDED:
11226            case DragEvent.ACTION_DRAG_EXITED:
11227            default:
11228                return true;
11229        }
11230    }
11231
11232    private void onDrop(DragEvent event) {
11233        StringBuilder content = new StringBuilder("");
11234        ClipData clipData = event.getClipData();
11235        final int itemCount = clipData.getItemCount();
11236        for (int i=0; i < itemCount; i++) {
11237            Item item = clipData.getItemAt(i);
11238            content.append(item.coerceToText(TextView.this.mContext));
11239        }
11240
11241        final int offset = getOffsetForPosition(event.getX(), event.getY());
11242
11243        Object localState = event.getLocalState();
11244        DragLocalState dragLocalState = null;
11245        if (localState instanceof DragLocalState) {
11246            dragLocalState = (DragLocalState) localState;
11247        }
11248        boolean dragDropIntoItself = dragLocalState != null &&
11249                dragLocalState.sourceTextView == this;
11250
11251        if (dragDropIntoItself) {
11252            if (offset >= dragLocalState.start && offset < dragLocalState.end) {
11253                // A drop inside the original selection discards the drop.
11254                return;
11255            }
11256        }
11257
11258        final int originalLength = mText.length();
11259        long minMax = prepareSpacesAroundPaste(offset, offset, content);
11260        int min = extractRangeStartFromLong(minMax);
11261        int max = extractRangeEndFromLong(minMax);
11262
11263        Selection.setSelection((Spannable) mText, max);
11264        replaceText_internal(min, max, content);
11265
11266        if (dragDropIntoItself) {
11267            int dragSourceStart = dragLocalState.start;
11268            int dragSourceEnd = dragLocalState.end;
11269            if (max <= dragSourceStart) {
11270                // Inserting text before selection has shifted positions
11271                final int shift = mText.length() - originalLength;
11272                dragSourceStart += shift;
11273                dragSourceEnd += shift;
11274            }
11275
11276            // Delete original selection
11277            deleteText_internal(dragSourceStart, dragSourceEnd);
11278
11279            // Make sure we do not leave two adjacent spaces.
11280            if ((dragSourceStart == 0 ||
11281                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart - 1))) &&
11282                    (dragSourceStart == mText.length() ||
11283                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart)))) {
11284                final int pos = dragSourceStart == mText.length() ?
11285                        dragSourceStart - 1 : dragSourceStart;
11286                deleteText_internal(pos, pos + 1);
11287            }
11288        }
11289    }
11290
11291    /**
11292     * @return True if this view supports insertion handles.
11293     */
11294    boolean hasInsertionController() {
11295        return mInsertionControllerEnabled;
11296    }
11297
11298    /**
11299     * @return True if this view supports selection handles.
11300     */
11301    boolean hasSelectionController() {
11302        return mSelectionControllerEnabled;
11303    }
11304
11305    InsertionPointCursorController getInsertionController() {
11306        if (!mInsertionControllerEnabled) {
11307            return null;
11308        }
11309
11310        if (mInsertionPointCursorController == null) {
11311            mInsertionPointCursorController = new InsertionPointCursorController();
11312
11313            final ViewTreeObserver observer = getViewTreeObserver();
11314            observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
11315        }
11316
11317        return mInsertionPointCursorController;
11318    }
11319
11320    SelectionModifierCursorController getSelectionController() {
11321        if (!mSelectionControllerEnabled) {
11322            return null;
11323        }
11324
11325        if (mSelectionModifierCursorController == null) {
11326            mSelectionModifierCursorController = new SelectionModifierCursorController();
11327
11328            final ViewTreeObserver observer = getViewTreeObserver();
11329            observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
11330        }
11331
11332        return mSelectionModifierCursorController;
11333    }
11334
11335    boolean isInBatchEditMode() {
11336        final InputMethodState ims = mInputMethodState;
11337        if (ims != null) {
11338            return ims.mBatchEditNesting > 0;
11339        }
11340        return mInBatchEditControllers;
11341    }
11342
11343    @Override
11344    protected void resolveTextDirection() {
11345        if (hasPasswordTransformationMethod()) {
11346            mTextDir = TextDirectionHeuristics.LOCALE;
11347            return;
11348        }
11349
11350        // Always need to resolve layout direction first
11351        final boolean defaultIsRtl = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL);
11352
11353        // Then resolve text direction on the parent
11354        super.resolveTextDirection();
11355
11356        // Now, we can select the heuristic
11357        int textDir = getResolvedTextDirection();
11358        switch (textDir) {
11359            default:
11360            case TEXT_DIRECTION_FIRST_STRONG:
11361                mTextDir = (defaultIsRtl ? TextDirectionHeuristics.FIRSTSTRONG_RTL :
11362                        TextDirectionHeuristics.FIRSTSTRONG_LTR);
11363                break;
11364            case TEXT_DIRECTION_ANY_RTL:
11365                mTextDir = TextDirectionHeuristics.ANYRTL_LTR;
11366                break;
11367            case TEXT_DIRECTION_LTR:
11368                mTextDir = TextDirectionHeuristics.LTR;
11369                break;
11370            case TEXT_DIRECTION_RTL:
11371                mTextDir = TextDirectionHeuristics.RTL;
11372                break;
11373        }
11374    }
11375
11376    /**
11377     * Subclasses will need to override this method to implement their own way of resolving
11378     * drawables depending on the layout direction.
11379     *
11380     * A call to the super method will be required from the subclasses implementation.
11381     *
11382     */
11383    protected void resolveDrawables() {
11384        // No need to resolve twice
11385        if (mResolvedDrawables) {
11386            return;
11387        }
11388        // No drawable to resolve
11389        if (mDrawables == null) {
11390            return;
11391        }
11392        // No relative drawable to resolve
11393        if (mDrawables.mDrawableStart == null && mDrawables.mDrawableEnd == null) {
11394            mResolvedDrawables = true;
11395            return;
11396        }
11397
11398        Drawables dr = mDrawables;
11399        switch(getResolvedLayoutDirection()) {
11400            case LAYOUT_DIRECTION_RTL:
11401                if (dr.mDrawableStart != null) {
11402                    dr.mDrawableRight = dr.mDrawableStart;
11403
11404                    dr.mDrawableSizeRight = dr.mDrawableSizeStart;
11405                    dr.mDrawableHeightRight = dr.mDrawableHeightStart;
11406                }
11407                if (dr.mDrawableEnd != null) {
11408                    dr.mDrawableLeft = dr.mDrawableEnd;
11409
11410                    dr.mDrawableSizeLeft = dr.mDrawableSizeEnd;
11411                    dr.mDrawableHeightLeft = dr.mDrawableHeightEnd;
11412                }
11413                break;
11414
11415            case LAYOUT_DIRECTION_LTR:
11416            default:
11417                if (dr.mDrawableStart != null) {
11418                    dr.mDrawableLeft = dr.mDrawableStart;
11419
11420                    dr.mDrawableSizeLeft = dr.mDrawableSizeStart;
11421                    dr.mDrawableHeightLeft = dr.mDrawableHeightStart;
11422                }
11423                if (dr.mDrawableEnd != null) {
11424                    dr.mDrawableRight = dr.mDrawableEnd;
11425
11426                    dr.mDrawableSizeRight = dr.mDrawableSizeEnd;
11427                    dr.mDrawableHeightRight = dr.mDrawableHeightEnd;
11428                }
11429                break;
11430        }
11431        mResolvedDrawables = true;
11432    }
11433
11434    protected void resetResolvedDrawables() {
11435        mResolvedDrawables = false;
11436    }
11437
11438    /**
11439     * @hide
11440     */
11441    protected void viewClicked(InputMethodManager imm) {
11442        if (imm != null) {
11443            imm.viewClicked(this);
11444        }
11445    }
11446
11447    /**
11448     * Deletes the range of text [start, end[.
11449     * @hide
11450     */
11451    protected void deleteText_internal(int start, int end) {
11452        ((Editable) mText).delete(start, end);
11453    }
11454
11455    /**
11456     * Replaces the range of text [start, end[ by replacement text
11457     * @hide
11458     */
11459    protected void replaceText_internal(int start, int end, CharSequence text) {
11460        ((Editable) mText).replace(start, end, text);
11461    }
11462
11463    /**
11464     * Sets a span on the specified range of text
11465     * @hide
11466     */
11467    protected void setSpan_internal(Object span, int start, int end, int flags) {
11468        ((Editable) mText).setSpan(span, start, end, flags);
11469    }
11470
11471    /**
11472     * Moves the cursor to the specified offset position in text
11473     * @hide
11474     */
11475    protected void setCursorPosition_internal(int start, int end) {
11476        Selection.setSelection(((Editable) mText), start, end);
11477    }
11478
11479    @ViewDebug.ExportedProperty(category = "text")
11480    private CharSequence            mText;
11481    private CharSequence            mTransformed;
11482    private BufferType              mBufferType = BufferType.NORMAL;
11483
11484    private int                     mInputType = EditorInfo.TYPE_NULL;
11485    private CharSequence            mHint;
11486    private Layout                  mHintLayout;
11487
11488    private KeyListener             mInput;
11489
11490    private MovementMethod          mMovement;
11491    private TransformationMethod    mTransformation;
11492    private boolean                 mAllowTransformationLengthChange;
11493    private ChangeWatcher           mChangeWatcher;
11494
11495    private ArrayList<TextWatcher>  mListeners = null;
11496
11497    // display attributes
11498    private final TextPaint         mTextPaint;
11499    private boolean                 mUserSetTextScaleX;
11500    private final Paint             mHighlightPaint;
11501    private int                     mHighlightColor = 0x6633B5E5;
11502    private Layout                  mLayout;
11503
11504    private long                    mShowCursor;
11505    private Blink                   mBlink;
11506    private boolean                 mCursorVisible = true;
11507
11508    // Cursor Controllers.
11509    private InsertionPointCursorController mInsertionPointCursorController;
11510    private SelectionModifierCursorController mSelectionModifierCursorController;
11511    private ActionMode              mSelectionActionMode;
11512    private boolean                 mInsertionControllerEnabled;
11513    private boolean                 mSelectionControllerEnabled;
11514    private boolean                 mInBatchEditControllers;
11515
11516    private boolean                 mSelectAllOnFocus = false;
11517
11518    private int                     mGravity = Gravity.TOP | Gravity.START;
11519    private boolean                 mHorizontallyScrolling;
11520
11521    private int                     mAutoLinkMask;
11522    private boolean                 mLinksClickable = true;
11523
11524    private float                   mSpacingMult = 1.0f;
11525    private float                   mSpacingAdd = 0.0f;
11526    private boolean                 mTextIsSelectable = false;
11527
11528    private static final int        LINES = 1;
11529    private static final int        EMS = LINES;
11530    private static final int        PIXELS = 2;
11531
11532    private int                     mMaximum = Integer.MAX_VALUE;
11533    private int                     mMaxMode = LINES;
11534    private int                     mMinimum = 0;
11535    private int                     mMinMode = LINES;
11536
11537    private int                     mOldMaximum = mMaximum;
11538    private int                     mOldMaxMode = mMaxMode;
11539
11540    private int                     mMaxWidth = Integer.MAX_VALUE;
11541    private int                     mMaxWidthMode = PIXELS;
11542    private int                     mMinWidth = 0;
11543    private int                     mMinWidthMode = PIXELS;
11544
11545    private boolean                 mSingleLine;
11546    private int                     mDesiredHeightAtMeasure = -1;
11547    private boolean                 mIncludePad = true;
11548
11549    // tmp primitives, so we don't alloc them on each draw
11550    private Path                    mHighlightPath;
11551    private boolean                 mHighlightPathBogus = true;
11552    private static final RectF      sTempRect = new RectF();
11553    private static final float[]    sTmpPosition = new float[2];
11554
11555    // XXX should be much larger
11556    private static final int        VERY_WIDE = 1024*1024;
11557
11558    private static final int        BLINK = 500;
11559
11560    private static final int ANIMATED_SCROLL_GAP = 250;
11561    private long mLastScroll;
11562    private Scroller mScroller = null;
11563
11564    private BoringLayout.Metrics mBoring;
11565    private BoringLayout.Metrics mHintBoring;
11566
11567    private BoringLayout mSavedLayout, mSavedHintLayout;
11568
11569    private TextDirectionHeuristic mTextDir = null;
11570
11571    private static final InputFilter[] NO_FILTERS = new InputFilter[0];
11572    private InputFilter[] mFilters = NO_FILTERS;
11573    private static final Spanned EMPTY_SPANNED = new SpannedString("");
11574    private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20;
11575    // System wide time for last cut or copy action.
11576    private static long sLastCutOrCopyTime;
11577    // Used to highlight a word when it is corrected by the IME
11578    private CorrectionHighlighter mCorrectionHighlighter;
11579    // New state used to change background based on whether this TextView is multiline.
11580    private static final int[] MULTILINE_STATE_SET = { R.attr.state_multiline };
11581}
11582