TextView.java revision d2b5d1cf4aaa5ce95803a837f563292763184302 
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.pm.PackageManager;
25import android.content.res.ColorStateList;
26import android.content.res.Resources;
27import android.content.res.TypedArray;
28import android.content.res.XmlResourceParser;
29import android.graphics.Canvas;
30import android.graphics.Color;
31import android.graphics.Paint;
32import android.graphics.Path;
33import android.graphics.Rect;
34import android.graphics.RectF;
35import android.graphics.Typeface;
36import android.graphics.drawable.Drawable;
37import android.inputmethodservice.ExtractEditText;
38import android.net.Uri;
39import android.os.Bundle;
40import android.os.Handler;
41import android.os.Message;
42import android.os.Parcel;
43import android.os.Parcelable;
44import android.os.SystemClock;
45import android.text.BoringLayout;
46import android.text.DynamicLayout;
47import android.text.Editable;
48import android.text.GetChars;
49import android.text.GraphicsOperations;
50import android.text.InputFilter;
51import android.text.InputType;
52import android.text.Layout;
53import android.text.ParcelableSpan;
54import android.text.Selection;
55import android.text.SpanWatcher;
56import android.text.Spannable;
57import android.text.SpannableString;
58import android.text.SpannableStringBuilder;
59import android.text.Spanned;
60import android.text.SpannedString;
61import android.text.StaticLayout;
62import android.text.TextPaint;
63import android.text.TextUtils;
64import android.text.TextWatcher;
65import android.text.method.AllCapsTransformationMethod;
66import android.text.method.ArrowKeyMovementMethod;
67import android.text.method.DateKeyListener;
68import android.text.method.DateTimeKeyListener;
69import android.text.method.DialerKeyListener;
70import android.text.method.DigitsKeyListener;
71import android.text.method.KeyListener;
72import android.text.method.LinkMovementMethod;
73import android.text.method.MetaKeyKeyListener;
74import android.text.method.MovementMethod;
75import android.text.method.PasswordTransformationMethod;
76import android.text.method.SingleLineTransformationMethod;
77import android.text.method.TextKeyListener;
78import android.text.method.TimeKeyListener;
79import android.text.method.TransformationMethod;
80import android.text.method.TransformationMethod2;
81import android.text.method.WordIterator;
82import android.text.style.ClickableSpan;
83import android.text.style.ParagraphStyle;
84import android.text.style.SuggestionSpan;
85import android.text.style.TextAppearanceSpan;
86import android.text.style.URLSpan;
87import android.text.style.UnderlineSpan;
88import android.text.style.UpdateAppearance;
89import android.text.util.Linkify;
90import android.util.AttributeSet;
91import android.util.DisplayMetrics;
92import android.util.FloatMath;
93import android.util.Log;
94import android.util.TypedValue;
95import android.view.ActionMode;
96import android.view.ActionMode.Callback;
97import android.view.ContextMenu;
98import android.view.DragEvent;
99import android.view.Gravity;
100import android.view.HapticFeedbackConstants;
101import android.view.KeyCharacterMap;
102import android.view.KeyEvent;
103import android.view.LayoutInflater;
104import android.view.Menu;
105import android.view.MenuItem;
106import android.view.MotionEvent;
107import android.view.View;
108import android.view.ViewAncestor;
109import android.view.ViewConfiguration;
110import android.view.ViewDebug;
111import android.view.ViewGroup;
112import android.view.ViewGroup.LayoutParams;
113import android.view.ViewParent;
114import android.view.ViewTreeObserver;
115import android.view.WindowManager;
116import android.view.accessibility.AccessibilityEvent;
117import android.view.accessibility.AccessibilityManager;
118import android.view.accessibility.AccessibilityNodeInfo;
119import android.view.animation.AnimationUtils;
120import android.view.inputmethod.BaseInputConnection;
121import android.view.inputmethod.CompletionInfo;
122import android.view.inputmethod.CorrectionInfo;
123import android.view.inputmethod.EditorInfo;
124import android.view.inputmethod.ExtractedText;
125import android.view.inputmethod.ExtractedTextRequest;
126import android.view.inputmethod.InputConnection;
127import android.view.inputmethod.InputMethodManager;
128import android.widget.RemoteViews.RemoteView;
129
130import com.android.internal.util.FastMath;
131import com.android.internal.widget.EditableInputConnection;
132
133import org.xmlpull.v1.XmlPullParserException;
134
135import java.io.IOException;
136import java.lang.ref.WeakReference;
137import java.text.BreakIterator;
138import java.util.ArrayList;
139
140/**
141 * Displays text to the user and optionally allows them to edit it.  A TextView
142 * is a complete text editor, however the basic class is configured to not
143 * allow editing; see {@link EditText} for a subclass that configures the text
144 * view for editing.
145 *
146 * <p>
147 * <b>XML attributes</b>
148 * <p>
149 * See {@link android.R.styleable#TextView TextView Attributes},
150 * {@link android.R.styleable#View View Attributes}
151 *
152 * @attr ref android.R.styleable#TextView_text
153 * @attr ref android.R.styleable#TextView_bufferType
154 * @attr ref android.R.styleable#TextView_hint
155 * @attr ref android.R.styleable#TextView_textColor
156 * @attr ref android.R.styleable#TextView_textColorHighlight
157 * @attr ref android.R.styleable#TextView_textColorHint
158 * @attr ref android.R.styleable#TextView_textAppearance
159 * @attr ref android.R.styleable#TextView_textColorLink
160 * @attr ref android.R.styleable#TextView_textSize
161 * @attr ref android.R.styleable#TextView_textScaleX
162 * @attr ref android.R.styleable#TextView_typeface
163 * @attr ref android.R.styleable#TextView_textStyle
164 * @attr ref android.R.styleable#TextView_cursorVisible
165 * @attr ref android.R.styleable#TextView_maxLines
166 * @attr ref android.R.styleable#TextView_maxHeight
167 * @attr ref android.R.styleable#TextView_lines
168 * @attr ref android.R.styleable#TextView_height
169 * @attr ref android.R.styleable#TextView_minLines
170 * @attr ref android.R.styleable#TextView_minHeight
171 * @attr ref android.R.styleable#TextView_maxEms
172 * @attr ref android.R.styleable#TextView_maxWidth
173 * @attr ref android.R.styleable#TextView_ems
174 * @attr ref android.R.styleable#TextView_width
175 * @attr ref android.R.styleable#TextView_minEms
176 * @attr ref android.R.styleable#TextView_minWidth
177 * @attr ref android.R.styleable#TextView_gravity
178 * @attr ref android.R.styleable#TextView_scrollHorizontally
179 * @attr ref android.R.styleable#TextView_password
180 * @attr ref android.R.styleable#TextView_singleLine
181 * @attr ref android.R.styleable#TextView_selectAllOnFocus
182 * @attr ref android.R.styleable#TextView_includeFontPadding
183 * @attr ref android.R.styleable#TextView_maxLength
184 * @attr ref android.R.styleable#TextView_shadowColor
185 * @attr ref android.R.styleable#TextView_shadowDx
186 * @attr ref android.R.styleable#TextView_shadowDy
187 * @attr ref android.R.styleable#TextView_shadowRadius
188 * @attr ref android.R.styleable#TextView_autoLink
189 * @attr ref android.R.styleable#TextView_linksClickable
190 * @attr ref android.R.styleable#TextView_numeric
191 * @attr ref android.R.styleable#TextView_digits
192 * @attr ref android.R.styleable#TextView_phoneNumber
193 * @attr ref android.R.styleable#TextView_inputMethod
194 * @attr ref android.R.styleable#TextView_capitalize
195 * @attr ref android.R.styleable#TextView_autoText
196 * @attr ref android.R.styleable#TextView_editable
197 * @attr ref android.R.styleable#TextView_freezesText
198 * @attr ref android.R.styleable#TextView_ellipsize
199 * @attr ref android.R.styleable#TextView_drawableTop
200 * @attr ref android.R.styleable#TextView_drawableBottom
201 * @attr ref android.R.styleable#TextView_drawableRight
202 * @attr ref android.R.styleable#TextView_drawableLeft
203 * @attr ref android.R.styleable#TextView_drawablePadding
204 * @attr ref android.R.styleable#TextView_lineSpacingExtra
205 * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
206 * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
207 * @attr ref android.R.styleable#TextView_inputType
208 * @attr ref android.R.styleable#TextView_imeOptions
209 * @attr ref android.R.styleable#TextView_privateImeOptions
210 * @attr ref android.R.styleable#TextView_imeActionLabel
211 * @attr ref android.R.styleable#TextView_imeActionId
212 * @attr ref android.R.styleable#TextView_editorExtras
213 */
214@RemoteView
215public class TextView extends View implements ViewTreeObserver.OnPreDrawListener {
216    static final String LOG_TAG = "TextView";
217    static final boolean DEBUG_EXTRACT = false;
218
219    private static final int PRIORITY = 100;
220    private int mCurrentAlpha = 255;
221
222    final int[] mTempCoords = new int[2];
223    Rect mTempRect;
224
225    private ColorStateList mTextColor;
226    private int mCurTextColor;
227    private ColorStateList mHintTextColor;
228    private ColorStateList mLinkTextColor;
229    private int mCurHintTextColor;
230    private boolean mFreezesText;
231    private boolean mFrozenWithFocus;
232    private boolean mTemporaryDetach;
233    private boolean mDispatchTemporaryDetach;
234
235    private boolean mDiscardNextActionUp = false;
236    private boolean mIgnoreActionUpEvent = false;
237
238    private Editable.Factory mEditableFactory = Editable.Factory.getInstance();
239    private Spannable.Factory mSpannableFactory = Spannable.Factory.getInstance();
240
241    private float mShadowRadius, mShadowDx, mShadowDy;
242
243    private static final int PREDRAW_NOT_REGISTERED = 0;
244    private static final int PREDRAW_PENDING = 1;
245    private static final int PREDRAW_DONE = 2;
246    private int mPreDrawState = PREDRAW_NOT_REGISTERED;
247
248    private TextUtils.TruncateAt mEllipsize = null;
249
250    // Enum for the "typeface" XML parameter.
251    // TODO: How can we get this from the XML instead of hardcoding it here?
252    private static final int SANS = 1;
253    private static final int SERIF = 2;
254    private static final int MONOSPACE = 3;
255
256    // Bitfield for the "numeric" XML parameter.
257    // TODO: How can we get this from the XML instead of hardcoding it here?
258    private static final int SIGNED = 2;
259    private static final int DECIMAL = 4;
260
261    class Drawables {
262        final Rect mCompoundRect = new Rect();
263        Drawable mDrawableTop, mDrawableBottom, mDrawableLeft, mDrawableRight,
264                mDrawableStart, mDrawableEnd;
265        int mDrawableSizeTop, mDrawableSizeBottom, mDrawableSizeLeft, mDrawableSizeRight,
266                mDrawableSizeStart, mDrawableSizeEnd;
267        int mDrawableWidthTop, mDrawableWidthBottom, mDrawableHeightLeft, mDrawableHeightRight,
268                mDrawableHeightStart, mDrawableHeightEnd;
269        int mDrawablePadding;
270    }
271    private Drawables mDrawables;
272
273    private CharSequence mError;
274    private boolean mErrorWasChanged;
275    private ErrorPopup mPopup;
276    /**
277     * This flag is set if the TextView tries to display an error before it
278     * is attached to the window (so its position is still unknown).
279     * It causes the error to be shown later, when onAttachedToWindow()
280     * is called.
281     */
282    private boolean mShowErrorAfterAttach;
283
284    private CharWrapper mCharWrapper = null;
285
286    private boolean mSelectionMoved = false;
287    private boolean mTouchFocusSelected = false;
288
289    private Marquee mMarquee;
290    private boolean mRestartMarquee;
291
292    private int mMarqueeRepeatLimit = 3;
293
294    class InputContentType {
295        int imeOptions = EditorInfo.IME_NULL;
296        String privateImeOptions;
297        CharSequence imeActionLabel;
298        int imeActionId;
299        Bundle extras;
300        OnEditorActionListener onEditorActionListener;
301        boolean enterDown;
302    }
303    InputContentType mInputContentType;
304
305    class InputMethodState {
306        Rect mCursorRectInWindow = new Rect();
307        RectF mTmpRectF = new RectF();
308        float[] mTmpOffset = new float[2];
309        ExtractedTextRequest mExtracting;
310        final ExtractedText mTmpExtracted = new ExtractedText();
311        int mBatchEditNesting;
312        boolean mCursorChanged;
313        boolean mSelectionModeChanged;
314        boolean mContentChanged;
315        int mChangedStart, mChangedEnd, mChangedDelta;
316    }
317    InputMethodState mInputMethodState;
318
319    private int mTextSelectHandleLeftRes;
320    private int mTextSelectHandleRightRes;
321    private int mTextSelectHandleRes;
322    private int mTextEditPasteWindowLayout, mTextEditSidePasteWindowLayout;
323    private int mTextEditNoPasteWindowLayout, mTextEditSideNoPasteWindowLayout;
324
325    private int mTextEditSuggestionsBottomWindowLayout, mTextEditSuggestionsTopWindowLayout;
326    private int mTextEditSuggestionItemLayout;
327    private SuggestionsPopupWindow mSuggestionsPopupWindow;
328    private SuggestionRangeSpan mSuggestionRangeSpan;
329    private boolean mSuggestionsEnabled = true;
330
331    private int mCursorDrawableRes;
332    private final Drawable[] mCursorDrawable = new Drawable[2];
333    private int mCursorCount; // Actual current number of used mCursorDrawable: 0, 1 or 2
334
335    private Drawable mSelectHandleLeft;
336    private Drawable mSelectHandleRight;
337    private Drawable mSelectHandleCenter;
338
339    private float mLastDownPositionX, mLastDownPositionY;
340    private Callback mCustomSelectionActionModeCallback;
341
342    private final int mSquaredTouchSlopDistance;
343    // Set when this TextView gained focus with some text selected. Will start selection mode.
344    private boolean mCreatedWithASelection = false;
345
346    private WordIterator mWordIterator;
347
348    // The alignment to pass to Layout, or null if not resolved.
349    private Layout.Alignment mLayoutAlignment;
350
351    // The default value for mTextAlign.
352    private TextAlign mTextAlign = TextAlign.INHERIT;
353
354    private static enum TextAlign {
355        INHERIT, GRAVITY, TEXT_START, TEXT_END, CENTER, VIEW_START, VIEW_END;
356    }
357
358    private boolean bResolvedDrawables = false;
359
360    /*
361     * Kick-start the font cache for the zygote process (to pay the cost of
362     * initializing freetype for our default font only once).
363     */
364    static {
365        Paint p = new Paint();
366        p.setAntiAlias(true);
367        // We don't care about the result, just the side-effect of measuring.
368        p.measureText("H");
369    }
370
371    /**
372     * Interface definition for a callback to be invoked when an action is
373     * performed on the editor.
374     */
375    public interface OnEditorActionListener {
376        /**
377         * Called when an action is being performed.
378         *
379         * @param v The view that was clicked.
380         * @param actionId Identifier of the action.  This will be either the
381         * identifier you supplied, or {@link EditorInfo#IME_NULL
382         * EditorInfo.IME_NULL} if being called due to the enter key
383         * being pressed.
384         * @param event If triggered by an enter key, this is the event;
385         * otherwise, this is null.
386         * @return Return true if you have consumed the action, else false.
387         */
388        boolean onEditorAction(TextView v, int actionId, KeyEvent event);
389    }
390
391    public TextView(Context context) {
392        this(context, null);
393    }
394
395    public TextView(Context context,
396                    AttributeSet attrs) {
397        this(context, attrs, com.android.internal.R.attr.textViewStyle);
398    }
399
400    @SuppressWarnings("deprecation")
401    public TextView(Context context,
402                    AttributeSet attrs,
403                    int defStyle) {
404        super(context, attrs, defStyle);
405        mText = "";
406
407        mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
408        mTextPaint.density = getResources().getDisplayMetrics().density;
409        mTextPaint.setCompatibilityScaling(
410                getResources().getCompatibilityInfo().applicationScale);
411
412        // If we get the paint from the skin, we should set it to left, since
413        // the layout always wants it to be left.
414        // mTextPaint.setTextAlign(Paint.Align.LEFT);
415
416        mHighlightPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
417        mHighlightPaint.setCompatibilityScaling(
418                getResources().getCompatibilityInfo().applicationScale);
419
420        mMovement = getDefaultMovementMethod();
421        mTransformation = null;
422
423        TypedArray a =
424            context.obtainStyledAttributes(
425                attrs, com.android.internal.R.styleable.TextView, defStyle, 0);
426
427        int textColorHighlight = 0;
428        ColorStateList textColor = null;
429        ColorStateList textColorHint = null;
430        ColorStateList textColorLink = null;
431        int textSize = 15;
432        int typefaceIndex = -1;
433        int styleIndex = -1;
434        boolean allCaps = false;
435
436        /*
437         * Look the appearance up without checking first if it exists because
438         * almost every TextView has one and it greatly simplifies the logic
439         * to be able to parse the appearance first and then let specific tags
440         * for this View override it.
441         */
442        TypedArray appearance = null;
443        int ap = a.getResourceId(com.android.internal.R.styleable.TextView_textAppearance, -1);
444        if (ap != -1) {
445            appearance = context.obtainStyledAttributes(ap,
446                                com.android.internal.R.styleable.
447                                TextAppearance);
448        }
449        if (appearance != null) {
450            int n = appearance.getIndexCount();
451            for (int i = 0; i < n; i++) {
452                int attr = appearance.getIndex(i);
453
454                switch (attr) {
455                case com.android.internal.R.styleable.TextAppearance_textColorHighlight:
456                    textColorHighlight = appearance.getColor(attr, textColorHighlight);
457                    break;
458
459                case com.android.internal.R.styleable.TextAppearance_textColor:
460                    textColor = appearance.getColorStateList(attr);
461                    break;
462
463                case com.android.internal.R.styleable.TextAppearance_textColorHint:
464                    textColorHint = appearance.getColorStateList(attr);
465                    break;
466
467                case com.android.internal.R.styleable.TextAppearance_textColorLink:
468                    textColorLink = appearance.getColorStateList(attr);
469                    break;
470
471                case com.android.internal.R.styleable.TextAppearance_textSize:
472                    textSize = appearance.getDimensionPixelSize(attr, textSize);
473                    break;
474
475                case com.android.internal.R.styleable.TextAppearance_typeface:
476                    typefaceIndex = appearance.getInt(attr, -1);
477                    break;
478
479                case com.android.internal.R.styleable.TextAppearance_textStyle:
480                    styleIndex = appearance.getInt(attr, -1);
481                    break;
482
483                case com.android.internal.R.styleable.TextAppearance_textAllCaps:
484                    allCaps = appearance.getBoolean(attr, false);
485                    break;
486                }
487            }
488
489            appearance.recycle();
490        }
491
492        boolean editable = getDefaultEditable();
493        CharSequence inputMethod = null;
494        int numeric = 0;
495        CharSequence digits = null;
496        boolean phone = false;
497        boolean autotext = false;
498        int autocap = -1;
499        int buffertype = 0;
500        boolean selectallonfocus = false;
501        Drawable drawableLeft = null, drawableTop = null, drawableRight = null,
502            drawableBottom = null, drawableStart = null, drawableEnd = null;
503        int drawablePadding = 0;
504        int ellipsize = -1;
505        boolean singleLine = false;
506        int maxlength = -1;
507        CharSequence text = "";
508        CharSequence hint = null;
509        int shadowcolor = 0;
510        float dx = 0, dy = 0, r = 0;
511        boolean password = false;
512        int inputType = EditorInfo.TYPE_NULL;
513
514        int n = a.getIndexCount();
515        for (int i = 0; i < n; i++) {
516            int attr = a.getIndex(i);
517
518            switch (attr) {
519            case com.android.internal.R.styleable.TextView_editable:
520                editable = a.getBoolean(attr, editable);
521                break;
522
523            case com.android.internal.R.styleable.TextView_inputMethod:
524                inputMethod = a.getText(attr);
525                break;
526
527            case com.android.internal.R.styleable.TextView_numeric:
528                numeric = a.getInt(attr, numeric);
529                break;
530
531            case com.android.internal.R.styleable.TextView_digits:
532                digits = a.getText(attr);
533                break;
534
535            case com.android.internal.R.styleable.TextView_phoneNumber:
536                phone = a.getBoolean(attr, phone);
537                break;
538
539            case com.android.internal.R.styleable.TextView_autoText:
540                autotext = a.getBoolean(attr, autotext);
541                break;
542
543            case com.android.internal.R.styleable.TextView_capitalize:
544                autocap = a.getInt(attr, autocap);
545                break;
546
547            case com.android.internal.R.styleable.TextView_bufferType:
548                buffertype = a.getInt(attr, buffertype);
549                break;
550
551            case com.android.internal.R.styleable.TextView_selectAllOnFocus:
552                selectallonfocus = a.getBoolean(attr, selectallonfocus);
553                break;
554
555            case com.android.internal.R.styleable.TextView_autoLink:
556                mAutoLinkMask = a.getInt(attr, 0);
557                break;
558
559            case com.android.internal.R.styleable.TextView_linksClickable:
560                mLinksClickable = a.getBoolean(attr, true);
561                break;
562
563            case com.android.internal.R.styleable.TextView_drawableLeft:
564                drawableLeft = a.getDrawable(attr);
565                break;
566
567            case com.android.internal.R.styleable.TextView_drawableTop:
568                drawableTop = a.getDrawable(attr);
569                break;
570
571            case com.android.internal.R.styleable.TextView_drawableRight:
572                drawableRight = a.getDrawable(attr);
573                break;
574
575            case com.android.internal.R.styleable.TextView_drawableBottom:
576                drawableBottom = a.getDrawable(attr);
577                break;
578
579            case com.android.internal.R.styleable.TextView_drawableStart:
580                drawableStart = a.getDrawable(attr);
581                break;
582
583            case com.android.internal.R.styleable.TextView_drawableEnd:
584                drawableEnd = a.getDrawable(attr);
585                break;
586
587            case com.android.internal.R.styleable.TextView_drawablePadding:
588                drawablePadding = a.getDimensionPixelSize(attr, drawablePadding);
589                break;
590
591            case com.android.internal.R.styleable.TextView_maxLines:
592                setMaxLines(a.getInt(attr, -1));
593                break;
594
595            case com.android.internal.R.styleable.TextView_maxHeight:
596                setMaxHeight(a.getDimensionPixelSize(attr, -1));
597                break;
598
599            case com.android.internal.R.styleable.TextView_lines:
600                setLines(a.getInt(attr, -1));
601                break;
602
603            case com.android.internal.R.styleable.TextView_height:
604                setHeight(a.getDimensionPixelSize(attr, -1));
605                break;
606
607            case com.android.internal.R.styleable.TextView_minLines:
608                setMinLines(a.getInt(attr, -1));
609                break;
610
611            case com.android.internal.R.styleable.TextView_minHeight:
612                setMinHeight(a.getDimensionPixelSize(attr, -1));
613                break;
614
615            case com.android.internal.R.styleable.TextView_maxEms:
616                setMaxEms(a.getInt(attr, -1));
617                break;
618
619            case com.android.internal.R.styleable.TextView_maxWidth:
620                setMaxWidth(a.getDimensionPixelSize(attr, -1));
621                break;
622
623            case com.android.internal.R.styleable.TextView_ems:
624                setEms(a.getInt(attr, -1));
625                break;
626
627            case com.android.internal.R.styleable.TextView_width:
628                setWidth(a.getDimensionPixelSize(attr, -1));
629                break;
630
631            case com.android.internal.R.styleable.TextView_minEms:
632                setMinEms(a.getInt(attr, -1));
633                break;
634
635            case com.android.internal.R.styleable.TextView_minWidth:
636                setMinWidth(a.getDimensionPixelSize(attr, -1));
637                break;
638
639            case com.android.internal.R.styleable.TextView_gravity:
640                setGravity(a.getInt(attr, -1));
641                break;
642
643            case com.android.internal.R.styleable.TextView_hint:
644                hint = a.getText(attr);
645                break;
646
647            case com.android.internal.R.styleable.TextView_text:
648                text = a.getText(attr);
649                break;
650
651            case com.android.internal.R.styleable.TextView_scrollHorizontally:
652                if (a.getBoolean(attr, false)) {
653                    setHorizontallyScrolling(true);
654                }
655                break;
656
657            case com.android.internal.R.styleable.TextView_singleLine:
658                singleLine = a.getBoolean(attr, singleLine);
659                break;
660
661            case com.android.internal.R.styleable.TextView_ellipsize:
662                ellipsize = a.getInt(attr, ellipsize);
663                break;
664
665            case com.android.internal.R.styleable.TextView_marqueeRepeatLimit:
666                setMarqueeRepeatLimit(a.getInt(attr, mMarqueeRepeatLimit));
667                break;
668
669            case com.android.internal.R.styleable.TextView_includeFontPadding:
670                if (!a.getBoolean(attr, true)) {
671                    setIncludeFontPadding(false);
672                }
673                break;
674
675            case com.android.internal.R.styleable.TextView_cursorVisible:
676                if (!a.getBoolean(attr, true)) {
677                    setCursorVisible(false);
678                }
679                break;
680
681            case com.android.internal.R.styleable.TextView_maxLength:
682                maxlength = a.getInt(attr, -1);
683                break;
684
685            case com.android.internal.R.styleable.TextView_textScaleX:
686                setTextScaleX(a.getFloat(attr, 1.0f));
687                break;
688
689            case com.android.internal.R.styleable.TextView_freezesText:
690                mFreezesText = a.getBoolean(attr, false);
691                break;
692
693            case com.android.internal.R.styleable.TextView_shadowColor:
694                shadowcolor = a.getInt(attr, 0);
695                break;
696
697            case com.android.internal.R.styleable.TextView_shadowDx:
698                dx = a.getFloat(attr, 0);
699                break;
700
701            case com.android.internal.R.styleable.TextView_shadowDy:
702                dy = a.getFloat(attr, 0);
703                break;
704
705            case com.android.internal.R.styleable.TextView_shadowRadius:
706                r = a.getFloat(attr, 0);
707                break;
708
709            case com.android.internal.R.styleable.TextView_enabled:
710                setEnabled(a.getBoolean(attr, isEnabled()));
711                break;
712
713            case com.android.internal.R.styleable.TextView_textColorHighlight:
714                textColorHighlight = a.getColor(attr, textColorHighlight);
715                break;
716
717            case com.android.internal.R.styleable.TextView_textColor:
718                textColor = a.getColorStateList(attr);
719                break;
720
721            case com.android.internal.R.styleable.TextView_textColorHint:
722                textColorHint = a.getColorStateList(attr);
723                break;
724
725            case com.android.internal.R.styleable.TextView_textColorLink:
726                textColorLink = a.getColorStateList(attr);
727                break;
728
729            case com.android.internal.R.styleable.TextView_textSize:
730                textSize = a.getDimensionPixelSize(attr, textSize);
731                break;
732
733            case com.android.internal.R.styleable.TextView_typeface:
734                typefaceIndex = a.getInt(attr, typefaceIndex);
735                break;
736
737            case com.android.internal.R.styleable.TextView_textStyle:
738                styleIndex = a.getInt(attr, styleIndex);
739                break;
740
741            case com.android.internal.R.styleable.TextView_password:
742                password = a.getBoolean(attr, password);
743                break;
744
745            case com.android.internal.R.styleable.TextView_lineSpacingExtra:
746                mSpacingAdd = a.getDimensionPixelSize(attr, (int) mSpacingAdd);
747                break;
748
749            case com.android.internal.R.styleable.TextView_lineSpacingMultiplier:
750                mSpacingMult = a.getFloat(attr, mSpacingMult);
751                break;
752
753            case com.android.internal.R.styleable.TextView_inputType:
754                inputType = a.getInt(attr, mInputType);
755                break;
756
757            case com.android.internal.R.styleable.TextView_imeOptions:
758                if (mInputContentType == null) {
759                    mInputContentType = new InputContentType();
760                }
761                mInputContentType.imeOptions = a.getInt(attr,
762                        mInputContentType.imeOptions);
763                break;
764
765            case com.android.internal.R.styleable.TextView_imeActionLabel:
766                if (mInputContentType == null) {
767                    mInputContentType = new InputContentType();
768                }
769                mInputContentType.imeActionLabel = a.getText(attr);
770                break;
771
772            case com.android.internal.R.styleable.TextView_imeActionId:
773                if (mInputContentType == null) {
774                    mInputContentType = new InputContentType();
775                }
776                mInputContentType.imeActionId = a.getInt(attr,
777                        mInputContentType.imeActionId);
778                break;
779
780            case com.android.internal.R.styleable.TextView_privateImeOptions:
781                setPrivateImeOptions(a.getString(attr));
782                break;
783
784            case com.android.internal.R.styleable.TextView_editorExtras:
785                try {
786                    setInputExtras(a.getResourceId(attr, 0));
787                } catch (XmlPullParserException e) {
788                    Log.w(LOG_TAG, "Failure reading input extras", e);
789                } catch (IOException e) {
790                    Log.w(LOG_TAG, "Failure reading input extras", e);
791                }
792                break;
793
794            case com.android.internal.R.styleable.TextView_textCursorDrawable:
795                mCursorDrawableRes = a.getResourceId(attr, 0);
796                break;
797
798            case com.android.internal.R.styleable.TextView_textSelectHandleLeft:
799                mTextSelectHandleLeftRes = a.getResourceId(attr, 0);
800                break;
801
802            case com.android.internal.R.styleable.TextView_textSelectHandleRight:
803                mTextSelectHandleRightRes = a.getResourceId(attr, 0);
804                break;
805
806            case com.android.internal.R.styleable.TextView_textSelectHandle:
807                mTextSelectHandleRes = a.getResourceId(attr, 0);
808                break;
809
810            case com.android.internal.R.styleable.TextView_textEditPasteWindowLayout:
811                mTextEditPasteWindowLayout = a.getResourceId(attr, 0);
812                break;
813
814            case com.android.internal.R.styleable.TextView_textEditNoPasteWindowLayout:
815                mTextEditNoPasteWindowLayout = a.getResourceId(attr, 0);
816                break;
817
818            case com.android.internal.R.styleable.TextView_textEditSidePasteWindowLayout:
819                mTextEditSidePasteWindowLayout = a.getResourceId(attr, 0);
820                break;
821
822            case com.android.internal.R.styleable.TextView_textEditSideNoPasteWindowLayout:
823                mTextEditSideNoPasteWindowLayout = a.getResourceId(attr, 0);
824                break;
825
826            case com.android.internal.R.styleable.TextView_textEditSuggestionsBottomWindowLayout:
827                mTextEditSuggestionsBottomWindowLayout = a.getResourceId(attr, 0);
828                break;
829
830            case com.android.internal.R.styleable.TextView_textEditSuggestionsTopWindowLayout:
831                mTextEditSuggestionsTopWindowLayout = a.getResourceId(attr, 0);
832                break;
833
834            case com.android.internal.R.styleable.TextView_textEditSuggestionItemLayout:
835                mTextEditSuggestionItemLayout = a.getResourceId(attr, 0);
836                break;
837
838            case com.android.internal.R.styleable.TextView_textIsSelectable:
839                mTextIsSelectable = a.getBoolean(attr, false);
840                break;
841
842            case com.android.internal.R.styleable.TextView_suggestionsEnabled:
843                mSuggestionsEnabled = a.getBoolean(attr, true);
844                break;
845
846            case com.android.internal.R.styleable.TextView_textAllCaps:
847                allCaps = a.getBoolean(attr, false);
848                break;
849            }
850        }
851        a.recycle();
852
853        BufferType bufferType = BufferType.EDITABLE;
854
855        final int variation =
856                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
857        final boolean passwordInputType = variation
858                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD);
859        final boolean webPasswordInputType = variation
860                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD);
861        final boolean numberPasswordInputType = variation
862                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
863
864        if (inputMethod != null) {
865            Class<?> c;
866
867            try {
868                c = Class.forName(inputMethod.toString());
869            } catch (ClassNotFoundException ex) {
870                throw new RuntimeException(ex);
871            }
872
873            try {
874                mInput = (KeyListener) c.newInstance();
875            } catch (InstantiationException ex) {
876                throw new RuntimeException(ex);
877            } catch (IllegalAccessException ex) {
878                throw new RuntimeException(ex);
879            }
880            try {
881                mInputType = inputType != EditorInfo.TYPE_NULL
882                        ? inputType
883                        : mInput.getInputType();
884            } catch (IncompatibleClassChangeError e) {
885                mInputType = EditorInfo.TYPE_CLASS_TEXT;
886            }
887        } else if (digits != null) {
888            mInput = DigitsKeyListener.getInstance(digits.toString());
889            // If no input type was specified, we will default to generic
890            // text, since we can't tell the IME about the set of digits
891            // that was selected.
892            mInputType = inputType != EditorInfo.TYPE_NULL
893                    ? inputType : EditorInfo.TYPE_CLASS_TEXT;
894        } else if (inputType != EditorInfo.TYPE_NULL) {
895            setInputType(inputType, true);
896            // If set, the input type overrides what was set using the deprecated singleLine flag.
897            singleLine = !isMultilineInputType(inputType);
898        } else if (phone) {
899            mInput = DialerKeyListener.getInstance();
900            mInputType = inputType = EditorInfo.TYPE_CLASS_PHONE;
901        } else if (numeric != 0) {
902            mInput = DigitsKeyListener.getInstance((numeric & SIGNED) != 0,
903                                                   (numeric & DECIMAL) != 0);
904            inputType = EditorInfo.TYPE_CLASS_NUMBER;
905            if ((numeric & SIGNED) != 0) {
906                inputType |= EditorInfo.TYPE_NUMBER_FLAG_SIGNED;
907            }
908            if ((numeric & DECIMAL) != 0) {
909                inputType |= EditorInfo.TYPE_NUMBER_FLAG_DECIMAL;
910            }
911            mInputType = inputType;
912        } else if (autotext || autocap != -1) {
913            TextKeyListener.Capitalize cap;
914
915            inputType = EditorInfo.TYPE_CLASS_TEXT;
916
917            switch (autocap) {
918            case 1:
919                cap = TextKeyListener.Capitalize.SENTENCES;
920                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES;
921                break;
922
923            case 2:
924                cap = TextKeyListener.Capitalize.WORDS;
925                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS;
926                break;
927
928            case 3:
929                cap = TextKeyListener.Capitalize.CHARACTERS;
930                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS;
931                break;
932
933            default:
934                cap = TextKeyListener.Capitalize.NONE;
935                break;
936            }
937
938            mInput = TextKeyListener.getInstance(autotext, cap);
939            mInputType = inputType;
940        } else if (mTextIsSelectable) {
941            // Prevent text changes from keyboard.
942            mInputType = EditorInfo.TYPE_NULL;
943            mInput = null;
944            bufferType = BufferType.SPANNABLE;
945            // Required to request focus while in touch mode.
946            setFocusableInTouchMode(true);
947            // So that selection can be changed using arrow keys and touch is handled.
948            setMovementMethod(ArrowKeyMovementMethod.getInstance());
949        } else if (editable) {
950            mInput = TextKeyListener.getInstance();
951            mInputType = EditorInfo.TYPE_CLASS_TEXT;
952        } else {
953            mInput = null;
954
955            switch (buffertype) {
956                case 0:
957                    bufferType = BufferType.NORMAL;
958                    break;
959                case 1:
960                    bufferType = BufferType.SPANNABLE;
961                    break;
962                case 2:
963                    bufferType = BufferType.EDITABLE;
964                    break;
965            }
966        }
967
968        // mInputType has been set from inputType, possibly modified by mInputMethod.
969        // Specialize mInputType to [web]password if we have a text class and the original input
970        // type was a password.
971        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
972            if (password || passwordInputType) {
973                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
974                        | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD;
975            }
976            if (webPasswordInputType) {
977                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
978                        | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD;
979            }
980        } else if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_NUMBER) {
981            if (numberPasswordInputType) {
982                mInputType = (mInputType & ~(EditorInfo.TYPE_MASK_VARIATION))
983                        | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD;
984            }
985        }
986
987        if (selectallonfocus) {
988            mSelectAllOnFocus = true;
989
990            if (bufferType == BufferType.NORMAL)
991                bufferType = BufferType.SPANNABLE;
992        }
993
994        setCompoundDrawablesWithIntrinsicBounds(
995            drawableLeft, drawableTop, drawableRight, drawableBottom);
996        setRelativeDrawablesIfNeeded(drawableStart, drawableEnd);
997        setCompoundDrawablePadding(drawablePadding);
998
999        // Same as setSingleLine(), but make sure the transformation method and the maximum number
1000        // of lines of height are unchanged for multi-line TextViews.
1001        setInputTypeSingleLine(singleLine);
1002        applySingleLine(singleLine, singleLine, singleLine);
1003
1004        if (singleLine && mInput == null && ellipsize < 0) {
1005                ellipsize = 3; // END
1006        }
1007
1008        switch (ellipsize) {
1009            case 1:
1010                setEllipsize(TextUtils.TruncateAt.START);
1011                break;
1012            case 2:
1013                setEllipsize(TextUtils.TruncateAt.MIDDLE);
1014                break;
1015            case 3:
1016                setEllipsize(TextUtils.TruncateAt.END);
1017                break;
1018            case 4:
1019                setHorizontalFadingEdgeEnabled(true);
1020                setEllipsize(TextUtils.TruncateAt.MARQUEE);
1021                break;
1022        }
1023
1024        setTextColor(textColor != null ? textColor : ColorStateList.valueOf(0xFF000000));
1025        setHintTextColor(textColorHint);
1026        setLinkTextColor(textColorLink);
1027        if (textColorHighlight != 0) {
1028            setHighlightColor(textColorHighlight);
1029        }
1030        setRawTextSize(textSize);
1031
1032        if (allCaps) {
1033            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
1034        }
1035
1036        if (password || passwordInputType || webPasswordInputType || numberPasswordInputType) {
1037            setTransformationMethod(PasswordTransformationMethod.getInstance());
1038            typefaceIndex = MONOSPACE;
1039        } else if ((mInputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION))
1040                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)) {
1041            typefaceIndex = MONOSPACE;
1042        }
1043
1044        setTypefaceByIndex(typefaceIndex, styleIndex);
1045
1046        if (shadowcolor != 0) {
1047            setShadowLayer(r, dx, dy, shadowcolor);
1048        }
1049
1050        if (maxlength >= 0) {
1051            setFilters(new InputFilter[] { new InputFilter.LengthFilter(maxlength) });
1052        } else {
1053            setFilters(NO_FILTERS);
1054        }
1055
1056        setText(text, bufferType);
1057        if (hint != null) setHint(hint);
1058
1059        /*
1060         * Views are not normally focusable unless specified to be.
1061         * However, TextViews that have input or movement methods *are*
1062         * focusable by default.
1063         */
1064        a = context.obtainStyledAttributes(attrs,
1065                                           com.android.internal.R.styleable.View,
1066                                           defStyle, 0);
1067
1068        boolean focusable = mMovement != null || mInput != null;
1069        boolean clickable = focusable;
1070        boolean longClickable = focusable;
1071
1072        n = a.getIndexCount();
1073        for (int i = 0; i < n; i++) {
1074            int attr = a.getIndex(i);
1075
1076            switch (attr) {
1077            case com.android.internal.R.styleable.View_focusable:
1078                focusable = a.getBoolean(attr, focusable);
1079                break;
1080
1081            case com.android.internal.R.styleable.View_clickable:
1082                clickable = a.getBoolean(attr, clickable);
1083                break;
1084
1085            case com.android.internal.R.styleable.View_longClickable:
1086                longClickable = a.getBoolean(attr, longClickable);
1087                break;
1088            }
1089        }
1090        a.recycle();
1091
1092        setFocusable(focusable);
1093        setClickable(clickable);
1094        setLongClickable(longClickable);
1095
1096        prepareCursorControllers();
1097
1098        final ViewConfiguration viewConfiguration = ViewConfiguration.get(context);
1099        final int touchSlop = viewConfiguration.getScaledTouchSlop();
1100        mSquaredTouchSlopDistance = touchSlop * touchSlop;
1101    }
1102
1103    private void setTypefaceByIndex(int typefaceIndex, int styleIndex) {
1104        Typeface tf = null;
1105        switch (typefaceIndex) {
1106            case SANS:
1107                tf = Typeface.SANS_SERIF;
1108                break;
1109
1110            case SERIF:
1111                tf = Typeface.SERIF;
1112                break;
1113
1114            case MONOSPACE:
1115                tf = Typeface.MONOSPACE;
1116                break;
1117        }
1118
1119        setTypeface(tf, styleIndex);
1120    }
1121
1122    private void setRelativeDrawablesIfNeeded(Drawable start, Drawable end) {
1123        boolean hasRelativeDrawables = (start != null) || (end != null);
1124        if (hasRelativeDrawables) {
1125            Drawables dr = mDrawables;
1126            if (dr == null) {
1127                mDrawables = dr = new Drawables();
1128            }
1129            final Rect compoundRect = dr.mCompoundRect;
1130            int[] state = getDrawableState();
1131            if (start != null) {
1132                start.setBounds(0, 0, start.getIntrinsicWidth(), start.getIntrinsicHeight());
1133                start.setState(state);
1134                start.copyBounds(compoundRect);
1135                start.setCallback(this);
1136
1137                dr.mDrawableStart = start;
1138                dr.mDrawableSizeStart = compoundRect.width();
1139                dr.mDrawableHeightStart = compoundRect.height();
1140            } else {
1141                dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1142            }
1143            if (end != null) {
1144                end.setBounds(0, 0, end.getIntrinsicWidth(), end.getIntrinsicHeight());
1145                end.setState(state);
1146                end.copyBounds(compoundRect);
1147                end.setCallback(this);
1148
1149                dr.mDrawableEnd = end;
1150                dr.mDrawableSizeEnd = compoundRect.width();
1151                dr.mDrawableHeightEnd = compoundRect.height();
1152            } else {
1153                dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1154            }
1155        }
1156    }
1157
1158    @Override
1159    public void setEnabled(boolean enabled) {
1160        if (enabled == isEnabled()) {
1161            return;
1162        }
1163
1164        if (!enabled) {
1165            // Hide the soft input if the currently active TextView is disabled
1166            InputMethodManager imm = InputMethodManager.peekInstance();
1167            if (imm != null && imm.isActive(this)) {
1168                imm.hideSoftInputFromWindow(getWindowToken(), 0);
1169            }
1170        }
1171        super.setEnabled(enabled);
1172        prepareCursorControllers();
1173    }
1174
1175    /**
1176     * Sets the typeface and style in which the text should be displayed,
1177     * and turns on the fake bold and italic bits in the Paint if the
1178     * Typeface that you provided does not have all the bits in the
1179     * style that you specified.
1180     *
1181     * @attr ref android.R.styleable#TextView_typeface
1182     * @attr ref android.R.styleable#TextView_textStyle
1183     */
1184    public void setTypeface(Typeface tf, int style) {
1185        if (style > 0) {
1186            if (tf == null) {
1187                tf = Typeface.defaultFromStyle(style);
1188            } else {
1189                tf = Typeface.create(tf, style);
1190            }
1191
1192            setTypeface(tf);
1193            // now compute what (if any) algorithmic styling is needed
1194            int typefaceStyle = tf != null ? tf.getStyle() : 0;
1195            int need = style & ~typefaceStyle;
1196            mTextPaint.setFakeBoldText((need & Typeface.BOLD) != 0);
1197            mTextPaint.setTextSkewX((need & Typeface.ITALIC) != 0 ? -0.25f : 0);
1198        } else {
1199            mTextPaint.setFakeBoldText(false);
1200            mTextPaint.setTextSkewX(0);
1201            setTypeface(tf);
1202        }
1203    }
1204
1205    /**
1206     * Subclasses override this to specify that they have a KeyListener
1207     * by default even if not specifically called for in the XML options.
1208     */
1209    protected boolean getDefaultEditable() {
1210        return false;
1211    }
1212
1213    /**
1214     * Subclasses override this to specify a default movement method.
1215     */
1216    protected MovementMethod getDefaultMovementMethod() {
1217        return null;
1218    }
1219
1220    /**
1221     * Return the text the TextView is displaying. If setText() was called with
1222     * an argument of BufferType.SPANNABLE or BufferType.EDITABLE, you can cast
1223     * the return value from this method to Spannable or Editable, respectively.
1224     *
1225     * Note: The content of the return value should not be modified. If you want
1226     * a modifiable one, you should make your own copy first.
1227     */
1228    @ViewDebug.CapturedViewProperty
1229    public CharSequence getText() {
1230        return mText;
1231    }
1232
1233    /**
1234     * Returns the length, in characters, of the text managed by this TextView
1235     */
1236    public int length() {
1237        return mText.length();
1238    }
1239
1240    /**
1241     * Return the text the TextView is displaying as an Editable object.  If
1242     * the text is not editable, null is returned.
1243     *
1244     * @see #getText
1245     */
1246    public Editable getEditableText() {
1247        return (mText instanceof Editable) ? (Editable)mText : null;
1248    }
1249
1250    /**
1251     * @return the height of one standard line in pixels.  Note that markup
1252     * within the text can cause individual lines to be taller or shorter
1253     * than this height, and the layout may contain additional first-
1254     * or last-line padding.
1255     */
1256    public int getLineHeight() {
1257        return FastMath.round(mTextPaint.getFontMetricsInt(null) * mSpacingMult + mSpacingAdd);
1258    }
1259
1260    /**
1261     * @return the Layout that is currently being used to display the text.
1262     * This can be null if the text or width has recently changes.
1263     */
1264    public final Layout getLayout() {
1265        return mLayout;
1266    }
1267
1268    /**
1269     * @return the current key listener for this TextView.
1270     * This will frequently be null for non-EditText TextViews.
1271     */
1272    public final KeyListener getKeyListener() {
1273        return mInput;
1274    }
1275
1276    /**
1277     * Sets the key listener to be used with this TextView.  This can be null
1278     * to disallow user input.  Note that this method has significant and
1279     * subtle interactions with soft keyboards and other input method:
1280     * see {@link KeyListener#getInputType() KeyListener.getContentType()}
1281     * for important details.  Calling this method will replace the current
1282     * content type of the text view with the content type returned by the
1283     * key listener.
1284     * <p>
1285     * Be warned that if you want a TextView with a key listener or movement
1286     * method not to be focusable, or if you want a TextView without a
1287     * key listener or movement method to be focusable, you must call
1288     * {@link #setFocusable} again after calling this to get the focusability
1289     * back the way you want it.
1290     *
1291     * @attr ref android.R.styleable#TextView_numeric
1292     * @attr ref android.R.styleable#TextView_digits
1293     * @attr ref android.R.styleable#TextView_phoneNumber
1294     * @attr ref android.R.styleable#TextView_inputMethod
1295     * @attr ref android.R.styleable#TextView_capitalize
1296     * @attr ref android.R.styleable#TextView_autoText
1297     */
1298    public void setKeyListener(KeyListener input) {
1299        setKeyListenerOnly(input);
1300        fixFocusableAndClickableSettings();
1301
1302        if (input != null) {
1303            try {
1304                mInputType = mInput.getInputType();
1305            } catch (IncompatibleClassChangeError e) {
1306                mInputType = EditorInfo.TYPE_CLASS_TEXT;
1307            }
1308            // Change inputType, without affecting transformation.
1309            // No need to applySingleLine since mSingleLine is unchanged.
1310            setInputTypeSingleLine(mSingleLine);
1311        } else {
1312            mInputType = EditorInfo.TYPE_NULL;
1313        }
1314
1315        InputMethodManager imm = InputMethodManager.peekInstance();
1316        if (imm != null) imm.restartInput(this);
1317    }
1318
1319    private void setKeyListenerOnly(KeyListener input) {
1320        mInput = input;
1321        if (mInput != null && !(mText instanceof Editable))
1322            setText(mText);
1323
1324        setFilters((Editable) mText, mFilters);
1325    }
1326
1327    /**
1328     * @return the movement method being used for this TextView.
1329     * This will frequently be null for non-EditText TextViews.
1330     */
1331    public final MovementMethod getMovementMethod() {
1332        return mMovement;
1333    }
1334
1335    /**
1336     * Sets the movement method (arrow key handler) to be used for
1337     * this TextView.  This can be null to disallow using the arrow keys
1338     * to move the cursor or scroll the view.
1339     * <p>
1340     * Be warned that if you want a TextView with a key listener or movement
1341     * method not to be focusable, or if you want a TextView without a
1342     * key listener or movement method to be focusable, you must call
1343     * {@link #setFocusable} again after calling this to get the focusability
1344     * back the way you want it.
1345     */
1346    public final void setMovementMethod(MovementMethod movement) {
1347        mMovement = movement;
1348
1349        if (mMovement != null && !(mText instanceof Spannable))
1350            setText(mText);
1351
1352        fixFocusableAndClickableSettings();
1353
1354        // SelectionModifierCursorController depends on textCanBeSelected, which depends on mMovement
1355        prepareCursorControllers();
1356    }
1357
1358    private void fixFocusableAndClickableSettings() {
1359        if ((mMovement != null) || mInput != null) {
1360            setFocusable(true);
1361            setClickable(true);
1362            setLongClickable(true);
1363        } else {
1364            setFocusable(false);
1365            setClickable(false);
1366            setLongClickable(false);
1367        }
1368    }
1369
1370    /**
1371     * @return the current transformation method for this TextView.
1372     * This will frequently be null except for single-line and password
1373     * fields.
1374     */
1375    public final TransformationMethod getTransformationMethod() {
1376        return mTransformation;
1377    }
1378
1379    /**
1380     * Sets the transformation that is applied to the text that this
1381     * TextView is displaying.
1382     *
1383     * @attr ref android.R.styleable#TextView_password
1384     * @attr ref android.R.styleable#TextView_singleLine
1385     */
1386    public final void setTransformationMethod(TransformationMethod method) {
1387        if (method == mTransformation) {
1388            // Avoid the setText() below if the transformation is
1389            // the same.
1390            return;
1391        }
1392        if (mTransformation != null) {
1393            if (mText instanceof Spannable) {
1394                ((Spannable) mText).removeSpan(mTransformation);
1395            }
1396        }
1397
1398        mTransformation = method;
1399
1400        if (method instanceof TransformationMethod2) {
1401            TransformationMethod2 method2 = (TransformationMethod2) method;
1402            mAllowTransformationLengthChange = !mTextIsSelectable && !(mText instanceof Editable);
1403            method2.setLengthChangesAllowed(mAllowTransformationLengthChange);
1404        } else {
1405            mAllowTransformationLengthChange = false;
1406        }
1407
1408        setText(mText);
1409    }
1410
1411    /**
1412     * Returns the top padding of the view, plus space for the top
1413     * Drawable if any.
1414     */
1415    public int getCompoundPaddingTop() {
1416        final Drawables dr = mDrawables;
1417        if (dr == null || dr.mDrawableTop == null) {
1418            return mPaddingTop;
1419        } else {
1420            return mPaddingTop + dr.mDrawablePadding + dr.mDrawableSizeTop;
1421        }
1422    }
1423
1424    /**
1425     * Returns the bottom padding of the view, plus space for the bottom
1426     * Drawable if any.
1427     */
1428    public int getCompoundPaddingBottom() {
1429        final Drawables dr = mDrawables;
1430        if (dr == null || dr.mDrawableBottom == null) {
1431            return mPaddingBottom;
1432        } else {
1433            return mPaddingBottom + dr.mDrawablePadding + dr.mDrawableSizeBottom;
1434        }
1435    }
1436
1437    /**
1438     * Returns the left padding of the view, plus space for the left
1439     * Drawable if any.
1440     */
1441    public int getCompoundPaddingLeft() {
1442        final Drawables dr = mDrawables;
1443        if (dr == null || dr.mDrawableLeft == null) {
1444            return mPaddingLeft;
1445        } else {
1446            return mPaddingLeft + dr.mDrawablePadding + dr.mDrawableSizeLeft;
1447        }
1448    }
1449
1450    /**
1451     * Returns the right padding of the view, plus space for the right
1452     * Drawable if any.
1453     */
1454    public int getCompoundPaddingRight() {
1455        final Drawables dr = mDrawables;
1456        if (dr == null || dr.mDrawableRight == null) {
1457            return mPaddingRight;
1458        } else {
1459            return mPaddingRight + dr.mDrawablePadding + dr.mDrawableSizeRight;
1460        }
1461    }
1462
1463    /**
1464     * Returns the start padding of the view, plus space for the start
1465     * Drawable if any.
1466     *
1467     * @hide
1468     */
1469    public int getCompoundPaddingStart() {
1470        resolveDrawables();
1471        switch(getResolvedLayoutDirection()) {
1472            default:
1473            case LAYOUT_DIRECTION_LTR:
1474                return getCompoundPaddingLeft();
1475            case LAYOUT_DIRECTION_RTL:
1476                return getCompoundPaddingRight();
1477        }
1478    }
1479
1480    /**
1481     * Returns the end padding of the view, plus space for the end
1482     * Drawable if any.
1483     *
1484     * @hide
1485     */
1486    public int getCompoundPaddingEnd() {
1487        resolveDrawables();
1488        switch(getResolvedLayoutDirection()) {
1489            default:
1490            case LAYOUT_DIRECTION_LTR:
1491                return getCompoundPaddingRight();
1492            case LAYOUT_DIRECTION_RTL:
1493                return getCompoundPaddingLeft();
1494        }
1495    }
1496
1497    /**
1498     * Returns the extended top padding of the view, including both the
1499     * top Drawable if any and any extra space to keep more than maxLines
1500     * of text from showing.  It is only valid to call this after measuring.
1501     */
1502    public int getExtendedPaddingTop() {
1503        if (mMaxMode != LINES) {
1504            return getCompoundPaddingTop();
1505        }
1506
1507        if (mLayout.getLineCount() <= mMaximum) {
1508            return getCompoundPaddingTop();
1509        }
1510
1511        int top = getCompoundPaddingTop();
1512        int bottom = getCompoundPaddingBottom();
1513        int viewht = getHeight() - top - bottom;
1514        int layoutht = mLayout.getLineTop(mMaximum);
1515
1516        if (layoutht >= viewht) {
1517            return top;
1518        }
1519
1520        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1521        if (gravity == Gravity.TOP) {
1522            return top;
1523        } else if (gravity == Gravity.BOTTOM) {
1524            return top + viewht - layoutht;
1525        } else { // (gravity == Gravity.CENTER_VERTICAL)
1526            return top + (viewht - layoutht) / 2;
1527        }
1528    }
1529
1530    /**
1531     * Returns the extended bottom padding of the view, including both the
1532     * bottom Drawable if any and any extra space to keep more than maxLines
1533     * of text from showing.  It is only valid to call this after measuring.
1534     */
1535    public int getExtendedPaddingBottom() {
1536        if (mMaxMode != LINES) {
1537            return getCompoundPaddingBottom();
1538        }
1539
1540        if (mLayout.getLineCount() <= mMaximum) {
1541            return getCompoundPaddingBottom();
1542        }
1543
1544        int top = getCompoundPaddingTop();
1545        int bottom = getCompoundPaddingBottom();
1546        int viewht = getHeight() - top - bottom;
1547        int layoutht = mLayout.getLineTop(mMaximum);
1548
1549        if (layoutht >= viewht) {
1550            return bottom;
1551        }
1552
1553        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1554        if (gravity == Gravity.TOP) {
1555            return bottom + viewht - layoutht;
1556        } else if (gravity == Gravity.BOTTOM) {
1557            return bottom;
1558        } else { // (gravity == Gravity.CENTER_VERTICAL)
1559            return bottom + (viewht - layoutht) / 2;
1560        }
1561    }
1562
1563    /**
1564     * Returns the total left padding of the view, including the left
1565     * Drawable if any.
1566     */
1567    public int getTotalPaddingLeft() {
1568        return getCompoundPaddingLeft();
1569    }
1570
1571    /**
1572     * Returns the total right padding of the view, including the right
1573     * Drawable if any.
1574     */
1575    public int getTotalPaddingRight() {
1576        return getCompoundPaddingRight();
1577    }
1578
1579    /**
1580     * Returns the total start padding of the view, including the start
1581     * Drawable if any.
1582     *
1583     * @hide
1584     */
1585    public int getTotalPaddingStart() {
1586        return getCompoundPaddingStart();
1587    }
1588
1589    /**
1590     * Returns the total end padding of the view, including the end
1591     * Drawable if any.
1592     *
1593     * @hide
1594     */
1595    public int getTotalPaddingEnd() {
1596        return getCompoundPaddingEnd();
1597    }
1598
1599    /**
1600     * Returns the total top padding of the view, including the top
1601     * Drawable if any, the extra space to keep more than maxLines
1602     * from showing, and the vertical offset for gravity, if any.
1603     */
1604    public int getTotalPaddingTop() {
1605        return getExtendedPaddingTop() + getVerticalOffset(true);
1606    }
1607
1608    /**
1609     * Returns the total bottom padding of the view, including the bottom
1610     * Drawable if any, the extra space to keep more than maxLines
1611     * from showing, and the vertical offset for gravity, if any.
1612     */
1613    public int getTotalPaddingBottom() {
1614        return getExtendedPaddingBottom() + getBottomVerticalOffset(true);
1615    }
1616
1617    /**
1618     * Sets the Drawables (if any) to appear to the left of, above,
1619     * to the right of, and below the text.  Use null if you do not
1620     * want a Drawable there.  The Drawables must already have had
1621     * {@link Drawable#setBounds} called.
1622     *
1623     * @attr ref android.R.styleable#TextView_drawableLeft
1624     * @attr ref android.R.styleable#TextView_drawableTop
1625     * @attr ref android.R.styleable#TextView_drawableRight
1626     * @attr ref android.R.styleable#TextView_drawableBottom
1627     */
1628    public void setCompoundDrawables(Drawable left, Drawable top,
1629                                     Drawable right, Drawable bottom) {
1630        Drawables dr = mDrawables;
1631
1632        final boolean drawables = left != null || top != null
1633                || right != null || bottom != null;
1634
1635        if (!drawables) {
1636            // Clearing drawables...  can we free the data structure?
1637            if (dr != null) {
1638                if (dr.mDrawablePadding == 0) {
1639                    mDrawables = null;
1640                } else {
1641                    // We need to retain the last set padding, so just clear
1642                    // out all of the fields in the existing structure.
1643                    if (dr.mDrawableLeft != null) dr.mDrawableLeft.setCallback(null);
1644                    dr.mDrawableLeft = null;
1645                    if (dr.mDrawableTop != null) dr.mDrawableTop.setCallback(null);
1646                    dr.mDrawableTop = null;
1647                    if (dr.mDrawableRight != null) dr.mDrawableRight.setCallback(null);
1648                    dr.mDrawableRight = null;
1649                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.setCallback(null);
1650                    dr.mDrawableBottom = null;
1651                    dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1652                    dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1653                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1654                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1655                }
1656            }
1657        } else {
1658            if (dr == null) {
1659                mDrawables = dr = new Drawables();
1660            }
1661
1662            if (dr.mDrawableLeft != left && dr.mDrawableLeft != null) {
1663                dr.mDrawableLeft.setCallback(null);
1664            }
1665            dr.mDrawableLeft = left;
1666
1667            if (dr.mDrawableTop != top && dr.mDrawableTop != null) {
1668                dr.mDrawableTop.setCallback(null);
1669            }
1670            dr.mDrawableTop = top;
1671
1672            if (dr.mDrawableRight != right && dr.mDrawableRight != null) {
1673                dr.mDrawableRight.setCallback(null);
1674            }
1675            dr.mDrawableRight = right;
1676
1677            if (dr.mDrawableBottom != bottom && dr.mDrawableBottom != null) {
1678                dr.mDrawableBottom.setCallback(null);
1679            }
1680            dr.mDrawableBottom = bottom;
1681
1682            final Rect compoundRect = dr.mCompoundRect;
1683            int[] state;
1684
1685            state = getDrawableState();
1686
1687            if (left != null) {
1688                left.setState(state);
1689                left.copyBounds(compoundRect);
1690                left.setCallback(this);
1691                dr.mDrawableSizeLeft = compoundRect.width();
1692                dr.mDrawableHeightLeft = compoundRect.height();
1693            } else {
1694                dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
1695            }
1696
1697            if (right != null) {
1698                right.setState(state);
1699                right.copyBounds(compoundRect);
1700                right.setCallback(this);
1701                dr.mDrawableSizeRight = compoundRect.width();
1702                dr.mDrawableHeightRight = compoundRect.height();
1703            } else {
1704                dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
1705            }
1706
1707            if (top != null) {
1708                top.setState(state);
1709                top.copyBounds(compoundRect);
1710                top.setCallback(this);
1711                dr.mDrawableSizeTop = compoundRect.height();
1712                dr.mDrawableWidthTop = compoundRect.width();
1713            } else {
1714                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1715            }
1716
1717            if (bottom != null) {
1718                bottom.setState(state);
1719                bottom.copyBounds(compoundRect);
1720                bottom.setCallback(this);
1721                dr.mDrawableSizeBottom = compoundRect.height();
1722                dr.mDrawableWidthBottom = compoundRect.width();
1723            } else {
1724                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1725            }
1726        }
1727
1728        invalidate();
1729        requestLayout();
1730    }
1731
1732    /**
1733     * Sets the Drawables (if any) to appear to the left of, above,
1734     * to the right of, and below the text.  Use 0 if you do not
1735     * want a Drawable there. The Drawables' bounds will be set to
1736     * their intrinsic bounds.
1737     *
1738     * @param left Resource identifier of the left Drawable.
1739     * @param top Resource identifier of the top Drawable.
1740     * @param right Resource identifier of the right Drawable.
1741     * @param bottom Resource identifier of the bottom Drawable.
1742     *
1743     * @attr ref android.R.styleable#TextView_drawableLeft
1744     * @attr ref android.R.styleable#TextView_drawableTop
1745     * @attr ref android.R.styleable#TextView_drawableRight
1746     * @attr ref android.R.styleable#TextView_drawableBottom
1747     */
1748    public void setCompoundDrawablesWithIntrinsicBounds(int left, int top, int right, int bottom) {
1749        final Resources resources = getContext().getResources();
1750        setCompoundDrawablesWithIntrinsicBounds(left != 0 ? resources.getDrawable(left) : null,
1751                top != 0 ? resources.getDrawable(top) : null,
1752                right != 0 ? resources.getDrawable(right) : null,
1753                bottom != 0 ? resources.getDrawable(bottom) : null);
1754    }
1755
1756    /**
1757     * Sets the Drawables (if any) to appear to the left of, above,
1758     * to the right of, and below the text.  Use null if you do not
1759     * want a Drawable there. The Drawables' bounds will be set to
1760     * their intrinsic bounds.
1761     *
1762     * @attr ref android.R.styleable#TextView_drawableLeft
1763     * @attr ref android.R.styleable#TextView_drawableTop
1764     * @attr ref android.R.styleable#TextView_drawableRight
1765     * @attr ref android.R.styleable#TextView_drawableBottom
1766     */
1767    public void setCompoundDrawablesWithIntrinsicBounds(Drawable left, Drawable top,
1768            Drawable right, Drawable bottom) {
1769
1770        if (left != null) {
1771            left.setBounds(0, 0, left.getIntrinsicWidth(), left.getIntrinsicHeight());
1772        }
1773        if (right != null) {
1774            right.setBounds(0, 0, right.getIntrinsicWidth(), right.getIntrinsicHeight());
1775        }
1776        if (top != null) {
1777            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
1778        }
1779        if (bottom != null) {
1780            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
1781        }
1782        setCompoundDrawables(left, top, right, bottom);
1783    }
1784
1785    /**
1786     * Sets the Drawables (if any) to appear to the start of, above,
1787     * to the end of, and below the text.  Use null if you do not
1788     * want a Drawable there.  The Drawables must already have had
1789     * {@link Drawable#setBounds} called.
1790     *
1791     * @attr ref android.R.styleable#TextView_drawableStart
1792     * @attr ref android.R.styleable#TextView_drawableTop
1793     * @attr ref android.R.styleable#TextView_drawableEnd
1794     * @attr ref android.R.styleable#TextView_drawableBottom
1795     *
1796     * @hide
1797     */
1798    public void setCompoundDrawablesRelative(Drawable start, Drawable top,
1799                                     Drawable end, Drawable bottom) {
1800        Drawables dr = mDrawables;
1801
1802        final boolean drawables = start != null || top != null
1803                || end != null || bottom != null;
1804
1805        if (!drawables) {
1806            // Clearing drawables...  can we free the data structure?
1807            if (dr != null) {
1808                if (dr.mDrawablePadding == 0) {
1809                    mDrawables = null;
1810                } else {
1811                    // We need to retain the last set padding, so just clear
1812                    // out all of the fields in the existing structure.
1813                    if (dr.mDrawableStart != null) dr.mDrawableStart.setCallback(null);
1814                    dr.mDrawableStart = null;
1815                    if (dr.mDrawableTop != null) dr.mDrawableTop.setCallback(null);
1816                    dr.mDrawableTop = null;
1817                    if (dr.mDrawableEnd != null) dr.mDrawableEnd.setCallback(null);
1818                    dr.mDrawableEnd = null;
1819                    if (dr.mDrawableBottom != null) dr.mDrawableBottom.setCallback(null);
1820                    dr.mDrawableBottom = null;
1821                    dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1822                    dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1823                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1824                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1825                }
1826            }
1827        } else {
1828            if (dr == null) {
1829                mDrawables = dr = new Drawables();
1830            }
1831
1832            if (dr.mDrawableStart != start && dr.mDrawableStart != null) {
1833                dr.mDrawableStart.setCallback(null);
1834            }
1835            dr.mDrawableStart = start;
1836
1837            if (dr.mDrawableTop != top && dr.mDrawableTop != null) {
1838                dr.mDrawableTop.setCallback(null);
1839            }
1840            dr.mDrawableTop = top;
1841
1842            if (dr.mDrawableEnd != end && dr.mDrawableEnd != null) {
1843                dr.mDrawableEnd.setCallback(null);
1844            }
1845            dr.mDrawableEnd = end;
1846
1847            if (dr.mDrawableBottom != bottom && dr.mDrawableBottom != null) {
1848                dr.mDrawableBottom.setCallback(null);
1849            }
1850            dr.mDrawableBottom = bottom;
1851
1852            final Rect compoundRect = dr.mCompoundRect;
1853            int[] state;
1854
1855            state = getDrawableState();
1856
1857            if (start != null) {
1858                start.setState(state);
1859                start.copyBounds(compoundRect);
1860                start.setCallback(this);
1861                dr.mDrawableSizeStart = compoundRect.width();
1862                dr.mDrawableHeightStart = compoundRect.height();
1863            } else {
1864                dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1865            }
1866
1867            if (end != null) {
1868                end.setState(state);
1869                end.copyBounds(compoundRect);
1870                end.setCallback(this);
1871                dr.mDrawableSizeEnd = compoundRect.width();
1872                dr.mDrawableHeightEnd = compoundRect.height();
1873            } else {
1874                dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1875            }
1876
1877            if (top != null) {
1878                top.setState(state);
1879                top.copyBounds(compoundRect);
1880                top.setCallback(this);
1881                dr.mDrawableSizeTop = compoundRect.height();
1882                dr.mDrawableWidthTop = compoundRect.width();
1883            } else {
1884                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
1885            }
1886
1887            if (bottom != null) {
1888                bottom.setState(state);
1889                bottom.copyBounds(compoundRect);
1890                bottom.setCallback(this);
1891                dr.mDrawableSizeBottom = compoundRect.height();
1892                dr.mDrawableWidthBottom = compoundRect.width();
1893            } else {
1894                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
1895            }
1896        }
1897
1898        resolveDrawables();
1899        invalidate();
1900        requestLayout();
1901    }
1902
1903    /**
1904     * Sets the Drawables (if any) to appear to the start of, above,
1905     * to the end of, and below the text.  Use 0 if you do not
1906     * want a Drawable there. The Drawables' bounds will be set to
1907     * their intrinsic bounds.
1908     *
1909     * @param start Resource identifier of the start Drawable.
1910     * @param top Resource identifier of the top Drawable.
1911     * @param end Resource identifier of the end Drawable.
1912     * @param bottom Resource identifier of the bottom Drawable.
1913     *
1914     * @attr ref android.R.styleable#TextView_drawableStart
1915     * @attr ref android.R.styleable#TextView_drawableTop
1916     * @attr ref android.R.styleable#TextView_drawableEnd
1917     * @attr ref android.R.styleable#TextView_drawableBottom
1918     *
1919     * @hide
1920     */
1921    public void setCompoundDrawablesRelativeWithIntrinsicBounds(int start, int top, int end,
1922            int bottom) {
1923        resetResolvedDrawables();
1924        final Resources resources = getContext().getResources();
1925        setCompoundDrawablesRelativeWithIntrinsicBounds(
1926                start != 0 ? resources.getDrawable(start) : null,
1927                top != 0 ? resources.getDrawable(top) : null,
1928                end != 0 ? resources.getDrawable(end) : null,
1929                bottom != 0 ? resources.getDrawable(bottom) : null);
1930    }
1931
1932    /**
1933     * Sets the Drawables (if any) to appear to the start of, above,
1934     * to the end of, and below the text.  Use null if you do not
1935     * want a Drawable there. The Drawables' bounds will be set to
1936     * their intrinsic bounds.
1937     *
1938     * @attr ref android.R.styleable#TextView_drawableStart
1939     * @attr ref android.R.styleable#TextView_drawableTop
1940     * @attr ref android.R.styleable#TextView_drawableEnd
1941     * @attr ref android.R.styleable#TextView_drawableBottom
1942     *
1943     * @hide
1944     */
1945    public void setCompoundDrawablesRelativeWithIntrinsicBounds(Drawable start, Drawable top,
1946            Drawable end, Drawable bottom) {
1947
1948        resetResolvedDrawables();
1949        if (start != null) {
1950            start.setBounds(0, 0, start.getIntrinsicWidth(), start.getIntrinsicHeight());
1951        }
1952        if (end != null) {
1953            end.setBounds(0, 0, end.getIntrinsicWidth(), end.getIntrinsicHeight());
1954        }
1955        if (top != null) {
1956            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
1957        }
1958        if (bottom != null) {
1959            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
1960        }
1961        setCompoundDrawablesRelative(start, top, end, bottom);
1962    }
1963
1964    /**
1965     * Returns drawables for the left, top, right, and bottom borders.
1966     */
1967    public Drawable[] getCompoundDrawables() {
1968        final Drawables dr = mDrawables;
1969        if (dr != null) {
1970            return new Drawable[] {
1971                dr.mDrawableLeft, dr.mDrawableTop, dr.mDrawableRight, dr.mDrawableBottom
1972            };
1973        } else {
1974            return new Drawable[] { null, null, null, null };
1975        }
1976    }
1977
1978    /**
1979     * Returns drawables for the start, top, end, and bottom borders.
1980     *
1981     * @hide
1982     */
1983    public Drawable[] getCompoundDrawablesRelative() {
1984        final Drawables dr = mDrawables;
1985        if (dr != null) {
1986            return new Drawable[] {
1987                dr.mDrawableStart, dr.mDrawableTop, dr.mDrawableEnd, dr.mDrawableBottom
1988            };
1989        } else {
1990            return new Drawable[] { null, null, null, null };
1991        }
1992    }
1993
1994    /**
1995     * Sets the size of the padding between the compound drawables and
1996     * the text.
1997     *
1998     * @attr ref android.R.styleable#TextView_drawablePadding
1999     */
2000    public void setCompoundDrawablePadding(int pad) {
2001        Drawables dr = mDrawables;
2002        if (pad == 0) {
2003            if (dr != null) {
2004                dr.mDrawablePadding = pad;
2005            }
2006        } else {
2007            if (dr == null) {
2008                mDrawables = dr = new Drawables();
2009            }
2010            dr.mDrawablePadding = pad;
2011        }
2012
2013        invalidate();
2014        requestLayout();
2015    }
2016
2017    /**
2018     * Returns the padding between the compound drawables and the text.
2019     */
2020    public int getCompoundDrawablePadding() {
2021        final Drawables dr = mDrawables;
2022        return dr != null ? dr.mDrawablePadding : 0;
2023    }
2024
2025    @Override
2026    public void setPadding(int left, int top, int right, int bottom) {
2027        if (left != mPaddingLeft ||
2028            right != mPaddingRight ||
2029            top != mPaddingTop ||
2030            bottom != mPaddingBottom) {
2031            nullLayouts();
2032        }
2033
2034        // the super call will requestLayout()
2035        super.setPadding(left, top, right, bottom);
2036        invalidate();
2037    }
2038
2039    /**
2040     * Gets the autolink mask of the text.  See {@link
2041     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
2042     * possible values.
2043     *
2044     * @attr ref android.R.styleable#TextView_autoLink
2045     */
2046    public final int getAutoLinkMask() {
2047        return mAutoLinkMask;
2048    }
2049
2050    /**
2051     * Sets the text color, size, style, hint color, and highlight color
2052     * from the specified TextAppearance resource.
2053     */
2054    public void setTextAppearance(Context context, int resid) {
2055        TypedArray appearance =
2056            context.obtainStyledAttributes(resid,
2057                                           com.android.internal.R.styleable.TextAppearance);
2058
2059        int color;
2060        ColorStateList colors;
2061        int ts;
2062
2063        color = appearance.getColor(com.android.internal.R.styleable.TextAppearance_textColorHighlight, 0);
2064        if (color != 0) {
2065            setHighlightColor(color);
2066        }
2067
2068        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2069                                              TextAppearance_textColor);
2070        if (colors != null) {
2071            setTextColor(colors);
2072        }
2073
2074        ts = appearance.getDimensionPixelSize(com.android.internal.R.styleable.
2075                                              TextAppearance_textSize, 0);
2076        if (ts != 0) {
2077            setRawTextSize(ts);
2078        }
2079
2080        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2081                                              TextAppearance_textColorHint);
2082        if (colors != null) {
2083            setHintTextColor(colors);
2084        }
2085
2086        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2087                                              TextAppearance_textColorLink);
2088        if (colors != null) {
2089            setLinkTextColor(colors);
2090        }
2091
2092        int typefaceIndex, styleIndex;
2093
2094        typefaceIndex = appearance.getInt(com.android.internal.R.styleable.
2095                                          TextAppearance_typeface, -1);
2096        styleIndex = appearance.getInt(com.android.internal.R.styleable.
2097                                       TextAppearance_textStyle, -1);
2098
2099        setTypefaceByIndex(typefaceIndex, styleIndex);
2100
2101        if (appearance.getBoolean(com.android.internal.R.styleable.TextAppearance_textAllCaps,
2102                false)) {
2103            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
2104        }
2105
2106        appearance.recycle();
2107    }
2108
2109    /**
2110     * @return the size (in pixels) of the default text size in this TextView.
2111     */
2112    public float getTextSize() {
2113        return mTextPaint.getTextSize();
2114    }
2115
2116    /**
2117     * Set the default text size to the given value, interpreted as "scaled
2118     * pixel" units.  This size is adjusted based on the current density and
2119     * user font size preference.
2120     *
2121     * @param size The scaled pixel size.
2122     *
2123     * @attr ref android.R.styleable#TextView_textSize
2124     */
2125    @android.view.RemotableViewMethod
2126    public void setTextSize(float size) {
2127        setTextSize(TypedValue.COMPLEX_UNIT_SP, size);
2128    }
2129
2130    /**
2131     * Set the default text size to a given unit and value.  See {@link
2132     * TypedValue} for the possible dimension units.
2133     *
2134     * @param unit The desired dimension unit.
2135     * @param size The desired size in the given units.
2136     *
2137     * @attr ref android.R.styleable#TextView_textSize
2138     */
2139    public void setTextSize(int unit, float size) {
2140        Context c = getContext();
2141        Resources r;
2142
2143        if (c == null)
2144            r = Resources.getSystem();
2145        else
2146            r = c.getResources();
2147
2148        setRawTextSize(TypedValue.applyDimension(
2149            unit, size, r.getDisplayMetrics()));
2150    }
2151
2152    private void setRawTextSize(float size) {
2153        if (size != mTextPaint.getTextSize()) {
2154            mTextPaint.setTextSize(size);
2155
2156            if (mLayout != null) {
2157                nullLayouts();
2158                requestLayout();
2159                invalidate();
2160            }
2161        }
2162    }
2163
2164    /**
2165     * @return the extent by which text is currently being stretched
2166     * horizontally.  This will usually be 1.
2167     */
2168    public float getTextScaleX() {
2169        return mTextPaint.getTextScaleX();
2170    }
2171
2172    /**
2173     * Sets the extent by which text should be stretched horizontally.
2174     *
2175     * @attr ref android.R.styleable#TextView_textScaleX
2176     */
2177    @android.view.RemotableViewMethod
2178    public void setTextScaleX(float size) {
2179        if (size != mTextPaint.getTextScaleX()) {
2180            mUserSetTextScaleX = true;
2181            mTextPaint.setTextScaleX(size);
2182
2183            if (mLayout != null) {
2184                nullLayouts();
2185                requestLayout();
2186                invalidate();
2187            }
2188        }
2189    }
2190
2191    /**
2192     * Sets the typeface and style in which the text should be displayed.
2193     * Note that not all Typeface families actually have bold and italic
2194     * variants, so you may need to use
2195     * {@link #setTypeface(Typeface, int)} to get the appearance
2196     * that you actually want.
2197     *
2198     * @attr ref android.R.styleable#TextView_typeface
2199     * @attr ref android.R.styleable#TextView_textStyle
2200     */
2201    public void setTypeface(Typeface tf) {
2202        if (mTextPaint.getTypeface() != tf) {
2203            mTextPaint.setTypeface(tf);
2204
2205            if (mLayout != null) {
2206                nullLayouts();
2207                requestLayout();
2208                invalidate();
2209            }
2210        }
2211    }
2212
2213    /**
2214     * @return the current typeface and style in which the text is being
2215     * displayed.
2216     */
2217    public Typeface getTypeface() {
2218        return mTextPaint.getTypeface();
2219    }
2220
2221    /**
2222     * Sets the text color for all the states (normal, selected,
2223     * focused) to be this color.
2224     *
2225     * @attr ref android.R.styleable#TextView_textColor
2226     */
2227    @android.view.RemotableViewMethod
2228    public void setTextColor(int color) {
2229        mTextColor = ColorStateList.valueOf(color);
2230        updateTextColors();
2231    }
2232
2233    /**
2234     * Sets the text color.
2235     *
2236     * @attr ref android.R.styleable#TextView_textColor
2237     */
2238    public void setTextColor(ColorStateList colors) {
2239        if (colors == null) {
2240            throw new NullPointerException();
2241        }
2242
2243        mTextColor = colors;
2244        updateTextColors();
2245    }
2246
2247    /**
2248     * Return the set of text colors.
2249     *
2250     * @return Returns the set of text colors.
2251     */
2252    public final ColorStateList getTextColors() {
2253        return mTextColor;
2254    }
2255
2256    /**
2257     * <p>Return the current color selected for normal text.</p>
2258     *
2259     * @return Returns the current text color.
2260     */
2261    public final int getCurrentTextColor() {
2262        return mCurTextColor;
2263    }
2264
2265    /**
2266     * Sets the color used to display the selection highlight.
2267     *
2268     * @attr ref android.R.styleable#TextView_textColorHighlight
2269     */
2270    @android.view.RemotableViewMethod
2271    public void setHighlightColor(int color) {
2272        if (mHighlightColor != color) {
2273            mHighlightColor = color;
2274            invalidate();
2275        }
2276    }
2277
2278    /**
2279     * Gives the text a shadow of the specified radius and color, the specified
2280     * distance from its normal position.
2281     *
2282     * @attr ref android.R.styleable#TextView_shadowColor
2283     * @attr ref android.R.styleable#TextView_shadowDx
2284     * @attr ref android.R.styleable#TextView_shadowDy
2285     * @attr ref android.R.styleable#TextView_shadowRadius
2286     */
2287    public void setShadowLayer(float radius, float dx, float dy, int color) {
2288        mTextPaint.setShadowLayer(radius, dx, dy, color);
2289
2290        mShadowRadius = radius;
2291        mShadowDx = dx;
2292        mShadowDy = dy;
2293
2294        invalidate();
2295    }
2296
2297    /**
2298     * @return the base paint used for the text.  Please use this only to
2299     * consult the Paint's properties and not to change them.
2300     */
2301    public TextPaint getPaint() {
2302        return mTextPaint;
2303    }
2304
2305    /**
2306     * Sets the autolink mask of the text.  See {@link
2307     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
2308     * possible values.
2309     *
2310     * @attr ref android.R.styleable#TextView_autoLink
2311     */
2312    @android.view.RemotableViewMethod
2313    public final void setAutoLinkMask(int mask) {
2314        mAutoLinkMask = mask;
2315    }
2316
2317    /**
2318     * Sets whether the movement method will automatically be set to
2319     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
2320     * set to nonzero and links are detected in {@link #setText}.
2321     * The default is true.
2322     *
2323     * @attr ref android.R.styleable#TextView_linksClickable
2324     */
2325    @android.view.RemotableViewMethod
2326    public final void setLinksClickable(boolean whether) {
2327        mLinksClickable = whether;
2328    }
2329
2330    /**
2331     * Returns whether the movement method will automatically be set to
2332     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
2333     * set to nonzero and links are detected in {@link #setText}.
2334     * The default is true.
2335     *
2336     * @attr ref android.R.styleable#TextView_linksClickable
2337     */
2338    public final boolean getLinksClickable() {
2339        return mLinksClickable;
2340    }
2341
2342    /**
2343     * Returns the list of URLSpans attached to the text
2344     * (by {@link Linkify} or otherwise) if any.  You can call
2345     * {@link URLSpan#getURL} on them to find where they link to
2346     * or use {@link Spanned#getSpanStart} and {@link Spanned#getSpanEnd}
2347     * to find the region of the text they are attached to.
2348     */
2349    public URLSpan[] getUrls() {
2350        if (mText instanceof Spanned) {
2351            return ((Spanned) mText).getSpans(0, mText.length(), URLSpan.class);
2352        } else {
2353            return new URLSpan[0];
2354        }
2355    }
2356
2357    /**
2358     * Sets the color of the hint text.
2359     *
2360     * @attr ref android.R.styleable#TextView_textColorHint
2361     */
2362    @android.view.RemotableViewMethod
2363    public final void setHintTextColor(int color) {
2364        mHintTextColor = ColorStateList.valueOf(color);
2365        updateTextColors();
2366    }
2367
2368    /**
2369     * Sets the color of the hint text.
2370     *
2371     * @attr ref android.R.styleable#TextView_textColorHint
2372     */
2373    public final void setHintTextColor(ColorStateList colors) {
2374        mHintTextColor = colors;
2375        updateTextColors();
2376    }
2377
2378    /**
2379     * <p>Return the color used to paint the hint text.</p>
2380     *
2381     * @return Returns the list of hint text colors.
2382     */
2383    public final ColorStateList getHintTextColors() {
2384        return mHintTextColor;
2385    }
2386
2387    /**
2388     * <p>Return the current color selected to paint the hint text.</p>
2389     *
2390     * @return Returns the current hint text color.
2391     */
2392    public final int getCurrentHintTextColor() {
2393        return mHintTextColor != null ? mCurHintTextColor : mCurTextColor;
2394    }
2395
2396    /**
2397     * Sets the color of links in the text.
2398     *
2399     * @attr ref android.R.styleable#TextView_textColorLink
2400     */
2401    @android.view.RemotableViewMethod
2402    public final void setLinkTextColor(int color) {
2403        mLinkTextColor = ColorStateList.valueOf(color);
2404        updateTextColors();
2405    }
2406
2407    /**
2408     * Sets the color of links in the text.
2409     *
2410     * @attr ref android.R.styleable#TextView_textColorLink
2411     */
2412    public final void setLinkTextColor(ColorStateList colors) {
2413        mLinkTextColor = colors;
2414        updateTextColors();
2415    }
2416
2417    /**
2418     * <p>Returns the color used to paint links in the text.</p>
2419     *
2420     * @return Returns the list of link text colors.
2421     */
2422    public final ColorStateList getLinkTextColors() {
2423        return mLinkTextColor;
2424    }
2425
2426    /**
2427     * Sets the horizontal alignment of the text and the
2428     * vertical gravity that will be used when there is extra space
2429     * in the TextView beyond what is required for the text itself.
2430     *
2431     * @see android.view.Gravity
2432     * @attr ref android.R.styleable#TextView_gravity
2433     */
2434    public void setGravity(int gravity) {
2435        if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) == 0) {
2436            gravity |= Gravity.START;
2437        }
2438        if ((gravity & Gravity.VERTICAL_GRAVITY_MASK) == 0) {
2439            gravity |= Gravity.TOP;
2440        }
2441
2442        boolean newLayout = false;
2443
2444        if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) !=
2445            (mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK)) {
2446            newLayout = true;
2447        }
2448
2449        if (gravity != mGravity) {
2450            invalidate();
2451        }
2452
2453        mGravity = gravity;
2454
2455        if (mLayout != null && newLayout) {
2456            // XXX this is heavy-handed because no actual content changes.
2457            int want = mLayout.getWidth();
2458            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
2459
2460            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
2461                          mRight - mLeft - getCompoundPaddingLeft() -
2462                          getCompoundPaddingRight(), true);
2463        }
2464    }
2465
2466    /**
2467     * Returns the horizontal and vertical alignment of this TextView.
2468     *
2469     * @see android.view.Gravity
2470     * @attr ref android.R.styleable#TextView_gravity
2471     */
2472    public int getGravity() {
2473        return mGravity;
2474    }
2475
2476    /**
2477     * @return the flags on the Paint being used to display the text.
2478     * @see Paint#getFlags
2479     */
2480    public int getPaintFlags() {
2481        return mTextPaint.getFlags();
2482    }
2483
2484    /**
2485     * Sets flags on the Paint being used to display the text and
2486     * reflows the text if they are different from the old flags.
2487     * @see Paint#setFlags
2488     */
2489    @android.view.RemotableViewMethod
2490    public void setPaintFlags(int flags) {
2491        if (mTextPaint.getFlags() != flags) {
2492            mTextPaint.setFlags(flags);
2493
2494            if (mLayout != null) {
2495                nullLayouts();
2496                requestLayout();
2497                invalidate();
2498            }
2499        }
2500    }
2501
2502    /**
2503     * Sets whether the text should be allowed to be wider than the
2504     * View is.  If false, it will be wrapped to the width of the View.
2505     *
2506     * @attr ref android.R.styleable#TextView_scrollHorizontally
2507     */
2508    public void setHorizontallyScrolling(boolean whether) {
2509        mHorizontallyScrolling = whether;
2510
2511        if (mLayout != null) {
2512            nullLayouts();
2513            requestLayout();
2514            invalidate();
2515        }
2516    }
2517
2518    /**
2519     * Makes the TextView at least this many lines tall.
2520     *
2521     * Setting this value overrides any other (minimum) height setting. A single line TextView will
2522     * set this value to 1.
2523     *
2524     * @attr ref android.R.styleable#TextView_minLines
2525     */
2526    @android.view.RemotableViewMethod
2527    public void setMinLines(int minlines) {
2528        mMinimum = minlines;
2529        mMinMode = LINES;
2530
2531        requestLayout();
2532        invalidate();
2533    }
2534
2535    /**
2536     * Makes the TextView at least this many pixels tall.
2537     *
2538     * Setting this value overrides any other (minimum) number of lines setting.
2539     *
2540     * @attr ref android.R.styleable#TextView_minHeight
2541     */
2542    @android.view.RemotableViewMethod
2543    public void setMinHeight(int minHeight) {
2544        mMinimum = minHeight;
2545        mMinMode = PIXELS;
2546
2547        requestLayout();
2548        invalidate();
2549    }
2550
2551    /**
2552     * Makes the TextView at most this many lines tall.
2553     *
2554     * Setting this value overrides any other (maximum) height setting.
2555     *
2556     * @attr ref android.R.styleable#TextView_maxLines
2557     */
2558    @android.view.RemotableViewMethod
2559    public void setMaxLines(int maxlines) {
2560        mMaximum = maxlines;
2561        mMaxMode = LINES;
2562
2563        requestLayout();
2564        invalidate();
2565    }
2566
2567    /**
2568     * Makes the TextView at most this many pixels tall.  This option is mutually exclusive with the
2569     * {@link #setMaxLines(int)} method.
2570     *
2571     * Setting this value overrides any other (maximum) number of lines setting.
2572     *
2573     * @attr ref android.R.styleable#TextView_maxHeight
2574     */
2575    @android.view.RemotableViewMethod
2576    public void setMaxHeight(int maxHeight) {
2577        mMaximum = maxHeight;
2578        mMaxMode = PIXELS;
2579
2580        requestLayout();
2581        invalidate();
2582    }
2583
2584    /**
2585     * Makes the TextView exactly this many lines tall.
2586     *
2587     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2588     * height setting. A single line TextView will set this value to 1.
2589     *
2590     * @attr ref android.R.styleable#TextView_lines
2591     */
2592    @android.view.RemotableViewMethod
2593    public void setLines(int lines) {
2594        mMaximum = mMinimum = lines;
2595        mMaxMode = mMinMode = LINES;
2596
2597        requestLayout();
2598        invalidate();
2599    }
2600
2601    /**
2602     * Makes the TextView exactly this many pixels tall.
2603     * You could do the same thing by specifying this number in the
2604     * LayoutParams.
2605     *
2606     * Note that setting this value overrides any other (minimum / maximum) number of lines or
2607     * height setting.
2608     *
2609     * @attr ref android.R.styleable#TextView_height
2610     */
2611    @android.view.RemotableViewMethod
2612    public void setHeight(int pixels) {
2613        mMaximum = mMinimum = pixels;
2614        mMaxMode = mMinMode = PIXELS;
2615
2616        requestLayout();
2617        invalidate();
2618    }
2619
2620    /**
2621     * Makes the TextView at least this many ems wide
2622     *
2623     * @attr ref android.R.styleable#TextView_minEms
2624     */
2625    @android.view.RemotableViewMethod
2626    public void setMinEms(int minems) {
2627        mMinWidth = minems;
2628        mMinWidthMode = EMS;
2629
2630        requestLayout();
2631        invalidate();
2632    }
2633
2634    /**
2635     * Makes the TextView at least this many pixels wide
2636     *
2637     * @attr ref android.R.styleable#TextView_minWidth
2638     */
2639    @android.view.RemotableViewMethod
2640    public void setMinWidth(int minpixels) {
2641        mMinWidth = minpixels;
2642        mMinWidthMode = PIXELS;
2643
2644        requestLayout();
2645        invalidate();
2646    }
2647
2648    /**
2649     * Makes the TextView at most this many ems wide
2650     *
2651     * @attr ref android.R.styleable#TextView_maxEms
2652     */
2653    @android.view.RemotableViewMethod
2654    public void setMaxEms(int maxems) {
2655        mMaxWidth = maxems;
2656        mMaxWidthMode = EMS;
2657
2658        requestLayout();
2659        invalidate();
2660    }
2661
2662    /**
2663     * Makes the TextView at most this many pixels wide
2664     *
2665     * @attr ref android.R.styleable#TextView_maxWidth
2666     */
2667    @android.view.RemotableViewMethod
2668    public void setMaxWidth(int maxpixels) {
2669        mMaxWidth = maxpixels;
2670        mMaxWidthMode = PIXELS;
2671
2672        requestLayout();
2673        invalidate();
2674    }
2675
2676    /**
2677     * Makes the TextView exactly this many ems wide
2678     *
2679     * @attr ref android.R.styleable#TextView_ems
2680     */
2681    @android.view.RemotableViewMethod
2682    public void setEms(int ems) {
2683        mMaxWidth = mMinWidth = ems;
2684        mMaxWidthMode = mMinWidthMode = EMS;
2685
2686        requestLayout();
2687        invalidate();
2688    }
2689
2690    /**
2691     * Makes the TextView exactly this many pixels wide.
2692     * You could do the same thing by specifying this number in the
2693     * LayoutParams.
2694     *
2695     * @attr ref android.R.styleable#TextView_width
2696     */
2697    @android.view.RemotableViewMethod
2698    public void setWidth(int pixels) {
2699        mMaxWidth = mMinWidth = pixels;
2700        mMaxWidthMode = mMinWidthMode = PIXELS;
2701
2702        requestLayout();
2703        invalidate();
2704    }
2705
2706
2707    /**
2708     * Sets line spacing for this TextView.  Each line will have its height
2709     * multiplied by <code>mult</code> and have <code>add</code> added to it.
2710     *
2711     * @attr ref android.R.styleable#TextView_lineSpacingExtra
2712     * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
2713     */
2714    public void setLineSpacing(float add, float mult) {
2715        mSpacingMult = mult;
2716        mSpacingAdd = add;
2717
2718        if (mLayout != null) {
2719            nullLayouts();
2720            requestLayout();
2721            invalidate();
2722        }
2723    }
2724
2725    /**
2726     * Convenience method: Append the specified text to the TextView's
2727     * display buffer, upgrading it to BufferType.EDITABLE if it was
2728     * not already editable.
2729     */
2730    public final void append(CharSequence text) {
2731        append(text, 0, text.length());
2732    }
2733
2734    /**
2735     * Convenience method: Append the specified text slice to the TextView's
2736     * display buffer, upgrading it to BufferType.EDITABLE if it was
2737     * not already editable.
2738     */
2739    public void append(CharSequence text, int start, int end) {
2740        if (!(mText instanceof Editable)) {
2741            setText(mText, BufferType.EDITABLE);
2742        }
2743
2744        ((Editable) mText).append(text, start, end);
2745    }
2746
2747    private void updateTextColors() {
2748        boolean inval = false;
2749        int color = mTextColor.getColorForState(getDrawableState(), 0);
2750        if (color != mCurTextColor) {
2751            mCurTextColor = color;
2752            inval = true;
2753        }
2754        if (mLinkTextColor != null) {
2755            color = mLinkTextColor.getColorForState(getDrawableState(), 0);
2756            if (color != mTextPaint.linkColor) {
2757                mTextPaint.linkColor = color;
2758                inval = true;
2759            }
2760        }
2761        if (mHintTextColor != null) {
2762            color = mHintTextColor.getColorForState(getDrawableState(), 0);
2763            if (color != mCurHintTextColor && mText.length() == 0) {
2764                mCurHintTextColor = color;
2765                inval = true;
2766            }
2767        }
2768        if (inval) {
2769            invalidate();
2770        }
2771    }
2772
2773    @Override
2774    protected void drawableStateChanged() {
2775        super.drawableStateChanged();
2776        if (mTextColor != null && mTextColor.isStateful()
2777                || (mHintTextColor != null && mHintTextColor.isStateful())
2778                || (mLinkTextColor != null && mLinkTextColor.isStateful())) {
2779            updateTextColors();
2780        }
2781
2782        final Drawables dr = mDrawables;
2783        if (dr != null) {
2784            int[] state = getDrawableState();
2785            if (dr.mDrawableTop != null && dr.mDrawableTop.isStateful()) {
2786                dr.mDrawableTop.setState(state);
2787            }
2788            if (dr.mDrawableBottom != null && dr.mDrawableBottom.isStateful()) {
2789                dr.mDrawableBottom.setState(state);
2790            }
2791            if (dr.mDrawableLeft != null && dr.mDrawableLeft.isStateful()) {
2792                dr.mDrawableLeft.setState(state);
2793            }
2794            if (dr.mDrawableRight != null && dr.mDrawableRight.isStateful()) {
2795                dr.mDrawableRight.setState(state);
2796            }
2797            if (dr.mDrawableStart != null && dr.mDrawableStart.isStateful()) {
2798                dr.mDrawableStart.setState(state);
2799            }
2800            if (dr.mDrawableEnd != null && dr.mDrawableEnd.isStateful()) {
2801                dr.mDrawableEnd.setState(state);
2802            }
2803        }
2804    }
2805
2806    /**
2807     * User interface state that is stored by TextView for implementing
2808     * {@link View#onSaveInstanceState}.
2809     */
2810    public static class SavedState extends BaseSavedState {
2811        int selStart;
2812        int selEnd;
2813        CharSequence text;
2814        boolean frozenWithFocus;
2815        CharSequence error;
2816
2817        SavedState(Parcelable superState) {
2818            super(superState);
2819        }
2820
2821        @Override
2822        public void writeToParcel(Parcel out, int flags) {
2823            super.writeToParcel(out, flags);
2824            out.writeInt(selStart);
2825            out.writeInt(selEnd);
2826            out.writeInt(frozenWithFocus ? 1 : 0);
2827            TextUtils.writeToParcel(text, out, flags);
2828
2829            if (error == null) {
2830                out.writeInt(0);
2831            } else {
2832                out.writeInt(1);
2833                TextUtils.writeToParcel(error, out, flags);
2834            }
2835        }
2836
2837        @Override
2838        public String toString() {
2839            String str = "TextView.SavedState{"
2840                    + Integer.toHexString(System.identityHashCode(this))
2841                    + " start=" + selStart + " end=" + selEnd;
2842            if (text != null) {
2843                str += " text=" + text;
2844            }
2845            return str + "}";
2846        }
2847
2848        @SuppressWarnings("hiding")
2849        public static final Parcelable.Creator<SavedState> CREATOR
2850                = new Parcelable.Creator<SavedState>() {
2851            public SavedState createFromParcel(Parcel in) {
2852                return new SavedState(in);
2853            }
2854
2855            public SavedState[] newArray(int size) {
2856                return new SavedState[size];
2857            }
2858        };
2859
2860        private SavedState(Parcel in) {
2861            super(in);
2862            selStart = in.readInt();
2863            selEnd = in.readInt();
2864            frozenWithFocus = (in.readInt() != 0);
2865            text = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2866
2867            if (in.readInt() != 0) {
2868                error = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
2869            }
2870        }
2871    }
2872
2873    @Override
2874    public Parcelable onSaveInstanceState() {
2875        Parcelable superState = super.onSaveInstanceState();
2876
2877        // Save state if we are forced to
2878        boolean save = mFreezesText;
2879        int start = 0;
2880        int end = 0;
2881
2882        if (mText != null) {
2883            start = getSelectionStart();
2884            end = getSelectionEnd();
2885            if (start >= 0 || end >= 0) {
2886                // Or save state if there is a selection
2887                save = true;
2888            }
2889        }
2890
2891        if (save) {
2892            SavedState ss = new SavedState(superState);
2893            // XXX Should also save the current scroll position!
2894            ss.selStart = start;
2895            ss.selEnd = end;
2896
2897            if (mText instanceof Spanned) {
2898                /*
2899                 * Calling setText() strips off any ChangeWatchers;
2900                 * strip them now to avoid leaking references.
2901                 * But do it to a copy so that if there are any
2902                 * further changes to the text of this view, it
2903                 * won't get into an inconsistent state.
2904                 */
2905
2906                Spannable sp = new SpannableString(mText);
2907
2908                for (ChangeWatcher cw :
2909                     sp.getSpans(0, sp.length(), ChangeWatcher.class)) {
2910                    sp.removeSpan(cw);
2911                }
2912
2913                // hideControllers would do it, but it gets called after this method on rotation
2914                sp.removeSpan(mSuggestionRangeSpan);
2915
2916                ss.text = sp;
2917            } else {
2918                ss.text = mText.toString();
2919            }
2920
2921            if (isFocused() && start >= 0 && end >= 0) {
2922                ss.frozenWithFocus = true;
2923            }
2924
2925            ss.error = mError;
2926
2927            return ss;
2928        }
2929
2930        return superState;
2931    }
2932
2933    @Override
2934    public void onRestoreInstanceState(Parcelable state) {
2935        if (!(state instanceof SavedState)) {
2936            super.onRestoreInstanceState(state);
2937            return;
2938        }
2939
2940        SavedState ss = (SavedState)state;
2941        super.onRestoreInstanceState(ss.getSuperState());
2942
2943        // XXX restore buffer type too, as well as lots of other stuff
2944        if (ss.text != null) {
2945            setText(ss.text);
2946        }
2947
2948        if (ss.selStart >= 0 && ss.selEnd >= 0) {
2949            if (mText instanceof Spannable) {
2950                int len = mText.length();
2951
2952                if (ss.selStart > len || ss.selEnd > len) {
2953                    String restored = "";
2954
2955                    if (ss.text != null) {
2956                        restored = "(restored) ";
2957                    }
2958
2959                    Log.e(LOG_TAG, "Saved cursor position " + ss.selStart +
2960                          "/" + ss.selEnd + " out of range for " + restored +
2961                          "text " + mText);
2962                } else {
2963                    Selection.setSelection((Spannable) mText, ss.selStart,
2964                                           ss.selEnd);
2965
2966                    if (ss.frozenWithFocus) {
2967                        mFrozenWithFocus = true;
2968                    }
2969                }
2970            }
2971        }
2972
2973        if (ss.error != null) {
2974            final CharSequence error = ss.error;
2975            // Display the error later, after the first layout pass
2976            post(new Runnable() {
2977                public void run() {
2978                    setError(error);
2979                }
2980            });
2981        }
2982    }
2983
2984    /**
2985     * Control whether this text view saves its entire text contents when
2986     * freezing to an icicle, in addition to dynamic state such as cursor
2987     * position.  By default this is false, not saving the text.  Set to true
2988     * if the text in the text view is not being saved somewhere else in
2989     * persistent storage (such as in a content provider) so that if the
2990     * view is later thawed the user will not lose their data.
2991     *
2992     * @param freezesText Controls whether a frozen icicle should include the
2993     * entire text data: true to include it, false to not.
2994     *
2995     * @attr ref android.R.styleable#TextView_freezesText
2996     */
2997    @android.view.RemotableViewMethod
2998    public void setFreezesText(boolean freezesText) {
2999        mFreezesText = freezesText;
3000    }
3001
3002    /**
3003     * Return whether this text view is including its entire text contents
3004     * in frozen icicles.
3005     *
3006     * @return Returns true if text is included, false if it isn't.
3007     *
3008     * @see #setFreezesText
3009     */
3010    public boolean getFreezesText() {
3011        return mFreezesText;
3012    }
3013
3014    ///////////////////////////////////////////////////////////////////////////
3015
3016    /**
3017     * Sets the Factory used to create new Editables.
3018     */
3019    public final void setEditableFactory(Editable.Factory factory) {
3020        mEditableFactory = factory;
3021        setText(mText);
3022    }
3023
3024    /**
3025     * Sets the Factory used to create new Spannables.
3026     */
3027    public final void setSpannableFactory(Spannable.Factory factory) {
3028        mSpannableFactory = factory;
3029        setText(mText);
3030    }
3031
3032    /**
3033     * Sets the string value of the TextView. TextView <em>does not</em> accept
3034     * HTML-like formatting, which you can do with text strings in XML resource files.
3035     * To style your strings, attach android.text.style.* objects to a
3036     * {@link android.text.SpannableString SpannableString}, or see the
3037     * <a href="{@docRoot}guide/topics/resources/available-resources.html#stringresources">
3038     * Available Resource Types</a> documentation for an example of setting
3039     * formatted text in the XML resource file.
3040     *
3041     * @attr ref android.R.styleable#TextView_text
3042     */
3043    @android.view.RemotableViewMethod
3044    public final void setText(CharSequence text) {
3045        setText(text, mBufferType);
3046    }
3047
3048    /**
3049     * Like {@link #setText(CharSequence)},
3050     * except that the cursor position (if any) is retained in the new text.
3051     *
3052     * @param text The new text to place in the text view.
3053     *
3054     * @see #setText(CharSequence)
3055     */
3056    @android.view.RemotableViewMethod
3057    public final void setTextKeepState(CharSequence text) {
3058        setTextKeepState(text, mBufferType);
3059    }
3060
3061    /**
3062     * Sets the text that this TextView is to display (see
3063     * {@link #setText(CharSequence)}) and also sets whether it is stored
3064     * in a styleable/spannable buffer and whether it is editable.
3065     *
3066     * @attr ref android.R.styleable#TextView_text
3067     * @attr ref android.R.styleable#TextView_bufferType
3068     */
3069    public void setText(CharSequence text, BufferType type) {
3070        setText(text, type, true, 0);
3071
3072        if (mCharWrapper != null) {
3073            mCharWrapper.mChars = null;
3074        }
3075    }
3076
3077    private void setText(CharSequence text, BufferType type,
3078                         boolean notifyBefore, int oldlen) {
3079        if (text == null) {
3080            text = "";
3081        }
3082
3083        if (!mUserSetTextScaleX) mTextPaint.setTextScaleX(1.0f);
3084
3085        if (text instanceof Spanned &&
3086            ((Spanned) text).getSpanStart(TextUtils.TruncateAt.MARQUEE) >= 0) {
3087            setHorizontalFadingEdgeEnabled(true);
3088            setEllipsize(TextUtils.TruncateAt.MARQUEE);
3089        }
3090
3091        int n = mFilters.length;
3092        for (int i = 0; i < n; i++) {
3093            CharSequence out = mFilters[i].filter(text, 0, text.length(),
3094                                                  EMPTY_SPANNED, 0, 0);
3095            if (out != null) {
3096                text = out;
3097            }
3098        }
3099
3100        if (notifyBefore) {
3101            if (mText != null) {
3102                oldlen = mText.length();
3103                sendBeforeTextChanged(mText, 0, oldlen, text.length());
3104            } else {
3105                sendBeforeTextChanged("", 0, 0, text.length());
3106            }
3107        }
3108
3109        boolean needEditableForNotification = false;
3110
3111        if (mListeners != null && mListeners.size() != 0) {
3112            needEditableForNotification = true;
3113        }
3114
3115        if (type == BufferType.EDITABLE || mInput != null ||
3116            needEditableForNotification) {
3117            Editable t = mEditableFactory.newEditable(text);
3118            text = t;
3119            setFilters(t, mFilters);
3120            InputMethodManager imm = InputMethodManager.peekInstance();
3121            if (imm != null) imm.restartInput(this);
3122        } else if (type == BufferType.SPANNABLE || mMovement != null) {
3123            text = mSpannableFactory.newSpannable(text);
3124        } else if (!(text instanceof CharWrapper)) {
3125            text = TextUtils.stringOrSpannedString(text);
3126        }
3127
3128        if (mAutoLinkMask != 0) {
3129            Spannable s2;
3130
3131            if (type == BufferType.EDITABLE || text instanceof Spannable) {
3132                s2 = (Spannable) text;
3133            } else {
3134                s2 = mSpannableFactory.newSpannable(text);
3135            }
3136
3137            if (Linkify.addLinks(s2, mAutoLinkMask)) {
3138                text = s2;
3139                type = (type == BufferType.EDITABLE) ? BufferType.EDITABLE : BufferType.SPANNABLE;
3140
3141                /*
3142                 * We must go ahead and set the text before changing the
3143                 * movement method, because setMovementMethod() may call
3144                 * setText() again to try to upgrade the buffer type.
3145                 */
3146                mText = text;
3147
3148                // Do not change the movement method for text that support text selection as it
3149                // would prevent an arbitrary cursor displacement.
3150                if (mLinksClickable && !textCanBeSelected()) {
3151                    setMovementMethod(LinkMovementMethod.getInstance());
3152                }
3153            }
3154        }
3155
3156        mBufferType = type;
3157        mText = text;
3158
3159        if (mTransformation == null) {
3160            mTransformed = text;
3161        } else {
3162            mTransformed = mTransformation.getTransformation(text, this);
3163        }
3164
3165        final int textLength = text.length();
3166
3167        if (text instanceof Spannable && !mAllowTransformationLengthChange) {
3168            Spannable sp = (Spannable) text;
3169
3170            // Remove any ChangeWatchers that might have come
3171            // from other TextViews.
3172            final ChangeWatcher[] watchers = sp.getSpans(0, sp.length(), ChangeWatcher.class);
3173            final int count = watchers.length;
3174            for (int i = 0; i < count; i++)
3175                sp.removeSpan(watchers[i]);
3176
3177            if (mChangeWatcher == null)
3178                mChangeWatcher = new ChangeWatcher();
3179
3180            sp.setSpan(mChangeWatcher, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE |
3181                       (PRIORITY << Spanned.SPAN_PRIORITY_SHIFT));
3182
3183            if (mInput != null) {
3184                sp.setSpan(mInput, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
3185            }
3186
3187            if (mTransformation != null) {
3188                sp.setSpan(mTransformation, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
3189            }
3190
3191            if (mMovement != null) {
3192                mMovement.initialize(this, (Spannable) text);
3193
3194                /*
3195                 * Initializing the movement method will have set the
3196                 * selection, so reset mSelectionMoved to keep that from
3197                 * interfering with the normal on-focus selection-setting.
3198                 */
3199                mSelectionMoved = false;
3200            }
3201        }
3202
3203        if (mLayout != null) {
3204            checkForRelayout();
3205        }
3206
3207        sendOnTextChanged(text, 0, oldlen, textLength);
3208        onTextChanged(text, 0, oldlen, textLength);
3209
3210        if (needEditableForNotification) {
3211            sendAfterTextChanged((Editable) text);
3212        }
3213
3214        // SelectionModifierCursorController depends on textCanBeSelected, which depends on text
3215        prepareCursorControllers();
3216    }
3217
3218    /**
3219     * Sets the TextView to display the specified slice of the specified
3220     * char array.  You must promise that you will not change the contents
3221     * of the array except for right before another call to setText(),
3222     * since the TextView has no way to know that the text
3223     * has changed and that it needs to invalidate and re-layout.
3224     */
3225    public final void setText(char[] text, int start, int len) {
3226        int oldlen = 0;
3227
3228        if (start < 0 || len < 0 || start + len > text.length) {
3229            throw new IndexOutOfBoundsException(start + ", " + len);
3230        }
3231
3232        /*
3233         * We must do the before-notification here ourselves because if
3234         * the old text is a CharWrapper we destroy it before calling
3235         * into the normal path.
3236         */
3237        if (mText != null) {
3238            oldlen = mText.length();
3239            sendBeforeTextChanged(mText, 0, oldlen, len);
3240        } else {
3241            sendBeforeTextChanged("", 0, 0, len);
3242        }
3243
3244        if (mCharWrapper == null) {
3245            mCharWrapper = new CharWrapper(text, start, len);
3246        } else {
3247            mCharWrapper.set(text, start, len);
3248        }
3249
3250        setText(mCharWrapper, mBufferType, false, oldlen);
3251    }
3252
3253    private static class CharWrapper implements CharSequence, GetChars, GraphicsOperations {
3254        private char[] mChars;
3255        private int mStart, mLength;
3256
3257        public CharWrapper(char[] chars, int start, int len) {
3258            mChars = chars;
3259            mStart = start;
3260            mLength = len;
3261        }
3262
3263        /* package */ void set(char[] chars, int start, int len) {
3264            mChars = chars;
3265            mStart = start;
3266            mLength = len;
3267        }
3268
3269        public int length() {
3270            return mLength;
3271        }
3272
3273        public char charAt(int off) {
3274            return mChars[off + mStart];
3275        }
3276
3277        @Override
3278        public String toString() {
3279            return new String(mChars, mStart, mLength);
3280        }
3281
3282        public CharSequence subSequence(int start, int end) {
3283            if (start < 0 || end < 0 || start > mLength || end > mLength) {
3284                throw new IndexOutOfBoundsException(start + ", " + end);
3285            }
3286
3287            return new String(mChars, start + mStart, end - start);
3288        }
3289
3290        public void getChars(int start, int end, char[] buf, int off) {
3291            if (start < 0 || end < 0 || start > mLength || end > mLength) {
3292                throw new IndexOutOfBoundsException(start + ", " + end);
3293            }
3294
3295            System.arraycopy(mChars, start + mStart, buf, off, end - start);
3296        }
3297
3298        public void drawText(Canvas c, int start, int end,
3299                             float x, float y, Paint p) {
3300            c.drawText(mChars, start + mStart, end - start, x, y, p);
3301        }
3302
3303        public void drawTextRun(Canvas c, int start, int end,
3304                int contextStart, int contextEnd, float x, float y, int flags, Paint p) {
3305            int count = end - start;
3306            int contextCount = contextEnd - contextStart;
3307            c.drawTextRun(mChars, start + mStart, count, contextStart + mStart,
3308                    contextCount, x, y, flags, p);
3309        }
3310
3311        public float measureText(int start, int end, Paint p) {
3312            return p.measureText(mChars, start + mStart, end - start);
3313        }
3314
3315        public int getTextWidths(int start, int end, float[] widths, Paint p) {
3316            return p.getTextWidths(mChars, start + mStart, end - start, widths);
3317        }
3318
3319        public float getTextRunAdvances(int start, int end, int contextStart,
3320                int contextEnd, int flags, float[] advances, int advancesIndex,
3321                Paint p) {
3322            int count = end - start;
3323            int contextCount = contextEnd - contextStart;
3324            return p.getTextRunAdvances(mChars, start + mStart, count,
3325                    contextStart + mStart, contextCount, flags, advances,
3326                    advancesIndex);
3327        }
3328
3329        public float getTextRunAdvances(int start, int end, int contextStart,
3330                int contextEnd, int flags, float[] advances, int advancesIndex,
3331                Paint p, int reserved) {
3332            int count = end - start;
3333            int contextCount = contextEnd - contextStart;
3334            return p.getTextRunAdvances(mChars, start + mStart, count,
3335                    contextStart + mStart, contextCount, flags, advances,
3336                    advancesIndex, reserved);
3337        }
3338
3339        public int getTextRunCursor(int contextStart, int contextEnd, int flags,
3340                int offset, int cursorOpt, Paint p) {
3341            int contextCount = contextEnd - contextStart;
3342            return p.getTextRunCursor(mChars, contextStart + mStart,
3343                    contextCount, flags, offset + mStart, cursorOpt);
3344        }
3345    }
3346
3347    /**
3348     * Like {@link #setText(CharSequence, android.widget.TextView.BufferType)},
3349     * except that the cursor position (if any) is retained in the new text.
3350     *
3351     * @see #setText(CharSequence, android.widget.TextView.BufferType)
3352     */
3353    public final void setTextKeepState(CharSequence text, BufferType type) {
3354        int start = getSelectionStart();
3355        int end = getSelectionEnd();
3356        int len = text.length();
3357
3358        setText(text, type);
3359
3360        if (start >= 0 || end >= 0) {
3361            if (mText instanceof Spannable) {
3362                Selection.setSelection((Spannable) mText,
3363                                       Math.max(0, Math.min(start, len)),
3364                                       Math.max(0, Math.min(end, len)));
3365            }
3366        }
3367    }
3368
3369    @android.view.RemotableViewMethod
3370    public final void setText(int resid) {
3371        setText(getContext().getResources().getText(resid));
3372    }
3373
3374    public final void setText(int resid, BufferType type) {
3375        setText(getContext().getResources().getText(resid), type);
3376    }
3377
3378    /**
3379     * Sets the text to be displayed when the text of the TextView is empty.
3380     * Null means to use the normal empty text. The hint does not currently
3381     * participate in determining the size of the view.
3382     *
3383     * @attr ref android.R.styleable#TextView_hint
3384     */
3385    @android.view.RemotableViewMethod
3386    public final void setHint(CharSequence hint) {
3387        mHint = TextUtils.stringOrSpannedString(hint);
3388
3389        if (mLayout != null) {
3390            checkForRelayout();
3391        }
3392
3393        if (mText.length() == 0) {
3394            invalidate();
3395        }
3396    }
3397
3398    /**
3399     * Sets the text to be displayed when the text of the TextView is empty,
3400     * from a resource.
3401     *
3402     * @attr ref android.R.styleable#TextView_hint
3403     */
3404    @android.view.RemotableViewMethod
3405    public final void setHint(int resid) {
3406        setHint(getContext().getResources().getText(resid));
3407    }
3408
3409    /**
3410     * Returns the hint that is displayed when the text of the TextView
3411     * is empty.
3412     *
3413     * @attr ref android.R.styleable#TextView_hint
3414     */
3415    @ViewDebug.CapturedViewProperty
3416    public CharSequence getHint() {
3417        return mHint;
3418    }
3419
3420    private boolean isMultilineInputType(int type) {
3421        return (type & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE)) ==
3422            (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE);
3423    }
3424
3425    /**
3426     * Set the type of the content with a constant as defined for {@link EditorInfo#inputType}. This
3427     * will take care of changing the key listener, by calling {@link #setKeyListener(KeyListener)},
3428     * to match the given content type.  If the given content type is {@link EditorInfo#TYPE_NULL}
3429     * then a soft keyboard will not be displayed for this text view.
3430     *
3431     * Note that the maximum number of displayed lines (see {@link #setMaxLines(int)}) will be
3432     * modified if you change the {@link EditorInfo#TYPE_TEXT_FLAG_MULTI_LINE} flag of the input
3433     * type.
3434     *
3435     * @see #getInputType()
3436     * @see #setRawInputType(int)
3437     * @see android.text.InputType
3438     * @attr ref android.R.styleable#TextView_inputType
3439     */
3440    public void setInputType(int type) {
3441        final boolean wasPassword = isPasswordInputType(mInputType);
3442        final boolean wasVisiblePassword = isVisiblePasswordInputType(mInputType);
3443        setInputType(type, false);
3444        final boolean isPassword = isPasswordInputType(type);
3445        final boolean isVisiblePassword = isVisiblePasswordInputType(type);
3446        boolean forceUpdate = false;
3447        if (isPassword) {
3448            setTransformationMethod(PasswordTransformationMethod.getInstance());
3449            setTypefaceByIndex(MONOSPACE, 0);
3450        } else if (isVisiblePassword) {
3451            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3452                forceUpdate = true;
3453            }
3454            setTypefaceByIndex(MONOSPACE, 0);
3455        } else if (wasPassword || wasVisiblePassword) {
3456            // not in password mode, clean up typeface and transformation
3457            setTypefaceByIndex(-1, -1);
3458            if (mTransformation == PasswordTransformationMethod.getInstance()) {
3459                forceUpdate = true;
3460            }
3461        }
3462
3463        boolean singleLine = !isMultilineInputType(type);
3464
3465        // We need to update the single line mode if it has changed or we
3466        // were previously in password mode.
3467        if (mSingleLine != singleLine || forceUpdate) {
3468            // Change single line mode, but only change the transformation if
3469            // we are not in password mode.
3470            applySingleLine(singleLine, !isPassword, true);
3471        }
3472
3473        InputMethodManager imm = InputMethodManager.peekInstance();
3474        if (imm != null) imm.restartInput(this);
3475    }
3476
3477    /**
3478     * It would be better to rely on the input type for everything. A password inputType should have
3479     * a password transformation. We should hence use isPasswordInputType instead of this method.
3480     *
3481     * We should:
3482     * - Call setInputType in setKeyListener instead of changing the input type directly (which
3483     * would install the correct transformation).
3484     * - Refuse the installation of a non-password transformation in setTransformation if the input
3485     * type is password.
3486     *
3487     * However, this is like this for legacy reasons and we cannot break existing apps. This method
3488     * is useful since it matches what the user can see (obfuscated text or not).
3489     *
3490     * @return true if the current transformation method is of the password type.
3491     */
3492    private boolean hasPasswordTransformationMethod() {
3493        return mTransformation instanceof PasswordTransformationMethod;
3494    }
3495
3496    private boolean isPasswordInputType(int inputType) {
3497        final int variation =
3498                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3499        return variation
3500                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)
3501                || variation
3502                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD)
3503                || variation
3504                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
3505    }
3506
3507    private boolean isVisiblePasswordInputType(int inputType) {
3508        final int variation =
3509                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
3510        return variation
3511                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
3512    }
3513
3514    /**
3515     * Directly change the content type integer of the text view, without
3516     * modifying any other state.
3517     * @see #setInputType(int)
3518     * @see android.text.InputType
3519     * @attr ref android.R.styleable#TextView_inputType
3520     */
3521    public void setRawInputType(int type) {
3522        mInputType = type;
3523    }
3524
3525    private void setInputType(int type, boolean direct) {
3526        final int cls = type & EditorInfo.TYPE_MASK_CLASS;
3527        KeyListener input;
3528        if (cls == EditorInfo.TYPE_CLASS_TEXT) {
3529            boolean autotext = (type & EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT) != 0;
3530            TextKeyListener.Capitalize cap;
3531            if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS) != 0) {
3532                cap = TextKeyListener.Capitalize.CHARACTERS;
3533            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS) != 0) {
3534                cap = TextKeyListener.Capitalize.WORDS;
3535            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES) != 0) {
3536                cap = TextKeyListener.Capitalize.SENTENCES;
3537            } else {
3538                cap = TextKeyListener.Capitalize.NONE;
3539            }
3540            input = TextKeyListener.getInstance(autotext, cap);
3541        } else if (cls == EditorInfo.TYPE_CLASS_NUMBER) {
3542            input = DigitsKeyListener.getInstance(
3543                    (type & EditorInfo.TYPE_NUMBER_FLAG_SIGNED) != 0,
3544                    (type & EditorInfo.TYPE_NUMBER_FLAG_DECIMAL) != 0);
3545        } else if (cls == EditorInfo.TYPE_CLASS_DATETIME) {
3546            switch (type & EditorInfo.TYPE_MASK_VARIATION) {
3547                case EditorInfo.TYPE_DATETIME_VARIATION_DATE:
3548                    input = DateKeyListener.getInstance();
3549                    break;
3550                case EditorInfo.TYPE_DATETIME_VARIATION_TIME:
3551                    input = TimeKeyListener.getInstance();
3552                    break;
3553                default:
3554                    input = DateTimeKeyListener.getInstance();
3555                    break;
3556            }
3557        } else if (cls == EditorInfo.TYPE_CLASS_PHONE) {
3558            input = DialerKeyListener.getInstance();
3559        } else {
3560            input = TextKeyListener.getInstance();
3561        }
3562        setRawInputType(type);
3563        if (direct) mInput = input;
3564        else {
3565            setKeyListenerOnly(input);
3566        }
3567    }
3568
3569    /**
3570     * Get the type of the content.
3571     *
3572     * @see #setInputType(int)
3573     * @see android.text.InputType
3574     */
3575    public int getInputType() {
3576        return mInputType;
3577    }
3578
3579    /**
3580     * Change the editor type integer associated with the text view, which
3581     * will be reported to an IME with {@link EditorInfo#imeOptions} when it
3582     * has focus.
3583     * @see #getImeOptions
3584     * @see android.view.inputmethod.EditorInfo
3585     * @attr ref android.R.styleable#TextView_imeOptions
3586     */
3587    public void setImeOptions(int imeOptions) {
3588        if (mInputContentType == null) {
3589            mInputContentType = new InputContentType();
3590        }
3591        mInputContentType.imeOptions = imeOptions;
3592    }
3593
3594    /**
3595     * Get the type of the IME editor.
3596     *
3597     * @see #setImeOptions(int)
3598     * @see android.view.inputmethod.EditorInfo
3599     */
3600    public int getImeOptions() {
3601        return mInputContentType != null
3602                ? mInputContentType.imeOptions : EditorInfo.IME_NULL;
3603    }
3604
3605    /**
3606     * Change the custom IME action associated with the text view, which
3607     * will be reported to an IME with {@link EditorInfo#actionLabel}
3608     * and {@link EditorInfo#actionId} when it has focus.
3609     * @see #getImeActionLabel
3610     * @see #getImeActionId
3611     * @see android.view.inputmethod.EditorInfo
3612     * @attr ref android.R.styleable#TextView_imeActionLabel
3613     * @attr ref android.R.styleable#TextView_imeActionId
3614     */
3615    public void setImeActionLabel(CharSequence label, int actionId) {
3616        if (mInputContentType == null) {
3617            mInputContentType = new InputContentType();
3618        }
3619        mInputContentType.imeActionLabel = label;
3620        mInputContentType.imeActionId = actionId;
3621    }
3622
3623    /**
3624     * Get the IME action label previous set with {@link #setImeActionLabel}.
3625     *
3626     * @see #setImeActionLabel
3627     * @see android.view.inputmethod.EditorInfo
3628     */
3629    public CharSequence getImeActionLabel() {
3630        return mInputContentType != null
3631                ? mInputContentType.imeActionLabel : null;
3632    }
3633
3634    /**
3635     * Get the IME action ID previous set with {@link #setImeActionLabel}.
3636     *
3637     * @see #setImeActionLabel
3638     * @see android.view.inputmethod.EditorInfo
3639     */
3640    public int getImeActionId() {
3641        return mInputContentType != null
3642                ? mInputContentType.imeActionId : 0;
3643    }
3644
3645    /**
3646     * Set a special listener to be called when an action is performed
3647     * on the text view.  This will be called when the enter key is pressed,
3648     * or when an action supplied to the IME is selected by the user.  Setting
3649     * this means that the normal hard key event will not insert a newline
3650     * into the text view, even if it is multi-line; holding down the ALT
3651     * modifier will, however, allow the user to insert a newline character.
3652     */
3653    public void setOnEditorActionListener(OnEditorActionListener l) {
3654        if (mInputContentType == null) {
3655            mInputContentType = new InputContentType();
3656        }
3657        mInputContentType.onEditorActionListener = l;
3658    }
3659
3660    /**
3661     * Called when an attached input method calls
3662     * {@link InputConnection#performEditorAction(int)
3663     * InputConnection.performEditorAction()}
3664     * for this text view.  The default implementation will call your action
3665     * listener supplied to {@link #setOnEditorActionListener}, or perform
3666     * a standard operation for {@link EditorInfo#IME_ACTION_NEXT
3667     * EditorInfo.IME_ACTION_NEXT}, {@link EditorInfo#IME_ACTION_PREVIOUS
3668     * EditorInfo.IME_ACTION_PREVIOUS}, or {@link EditorInfo#IME_ACTION_DONE
3669     * EditorInfo.IME_ACTION_DONE}.
3670     *
3671     * <p>For backwards compatibility, if no IME options have been set and the
3672     * text view would not normally advance focus on enter, then
3673     * the NEXT and DONE actions received here will be turned into an enter
3674     * key down/up pair to go through the normal key handling.
3675     *
3676     * @param actionCode The code of the action being performed.
3677     *
3678     * @see #setOnEditorActionListener
3679     */
3680    public void onEditorAction(int actionCode) {
3681        final InputContentType ict = mInputContentType;
3682        if (ict != null) {
3683            if (ict.onEditorActionListener != null) {
3684                if (ict.onEditorActionListener.onEditorAction(this,
3685                        actionCode, null)) {
3686                    return;
3687                }
3688            }
3689
3690            // This is the handling for some default action.
3691            // Note that for backwards compatibility we don't do this
3692            // default handling if explicit ime options have not been given,
3693            // instead turning this into the normal enter key codes that an
3694            // app may be expecting.
3695            if (actionCode == EditorInfo.IME_ACTION_NEXT) {
3696                View v = focusSearch(FOCUS_DOWN);
3697                if (v != null) {
3698                    if (!v.requestFocus(FOCUS_DOWN)) {
3699                        throw new IllegalStateException("focus search returned a view " +
3700                                "that wasn't able to take focus!");
3701                    }
3702                }
3703                return;
3704
3705            } else if (actionCode == EditorInfo.IME_ACTION_PREVIOUS) {
3706                View v = focusSearch(FOCUS_UP);
3707                if (v != null) {
3708                    if (!v.requestFocus(FOCUS_UP)) {
3709                        throw new IllegalStateException("focus search returned a view " +
3710                                "that wasn't able to take focus!");
3711                    }
3712                }
3713                return;
3714
3715            } else if (actionCode == EditorInfo.IME_ACTION_DONE) {
3716                InputMethodManager imm = InputMethodManager.peekInstance();
3717                if (imm != null && imm.isActive(this)) {
3718                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
3719                }
3720                return;
3721            }
3722        }
3723
3724        Handler h = getHandler();
3725        if (h != null) {
3726            long eventTime = SystemClock.uptimeMillis();
3727            h.sendMessage(h.obtainMessage(ViewAncestor.DISPATCH_KEY_FROM_IME,
3728                    new KeyEvent(eventTime, eventTime,
3729                    KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_ENTER, 0, 0,
3730                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3731                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3732                    | KeyEvent.FLAG_EDITOR_ACTION)));
3733            h.sendMessage(h.obtainMessage(ViewAncestor.DISPATCH_KEY_FROM_IME,
3734                    new KeyEvent(SystemClock.uptimeMillis(), eventTime,
3735                    KeyEvent.ACTION_UP, KeyEvent.KEYCODE_ENTER, 0, 0,
3736                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
3737                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
3738                    | KeyEvent.FLAG_EDITOR_ACTION)));
3739        }
3740    }
3741
3742    /**
3743     * Set the private content type of the text, which is the
3744     * {@link EditorInfo#privateImeOptions EditorInfo.privateImeOptions}
3745     * field that will be filled in when creating an input connection.
3746     *
3747     * @see #getPrivateImeOptions()
3748     * @see EditorInfo#privateImeOptions
3749     * @attr ref android.R.styleable#TextView_privateImeOptions
3750     */
3751    public void setPrivateImeOptions(String type) {
3752        if (mInputContentType == null) mInputContentType = new InputContentType();
3753        mInputContentType.privateImeOptions = type;
3754    }
3755
3756    /**
3757     * Get the private type of the content.
3758     *
3759     * @see #setPrivateImeOptions(String)
3760     * @see EditorInfo#privateImeOptions
3761     */
3762    public String getPrivateImeOptions() {
3763        return mInputContentType != null
3764                ? mInputContentType.privateImeOptions : null;
3765    }
3766
3767    /**
3768     * Set the extra input data of the text, which is the
3769     * {@link EditorInfo#extras TextBoxAttribute.extras}
3770     * Bundle that will be filled in when creating an input connection.  The
3771     * given integer is the resource ID of an XML resource holding an
3772     * {@link android.R.styleable#InputExtras &lt;input-extras&gt;} XML tree.
3773     *
3774     * @see #getInputExtras(boolean)
3775     * @see EditorInfo#extras
3776     * @attr ref android.R.styleable#TextView_editorExtras
3777     */
3778    public void setInputExtras(int xmlResId)
3779            throws XmlPullParserException, IOException {
3780        XmlResourceParser parser = getResources().getXml(xmlResId);
3781        if (mInputContentType == null) mInputContentType = new InputContentType();
3782        mInputContentType.extras = new Bundle();
3783        getResources().parseBundleExtras(parser, mInputContentType.extras);
3784    }
3785
3786    /**
3787     * Retrieve the input extras currently associated with the text view, which
3788     * can be viewed as well as modified.
3789     *
3790     * @param create If true, the extras will be created if they don't already
3791     * exist.  Otherwise, null will be returned if none have been created.
3792     * @see #setInputExtras(int)
3793     * @see EditorInfo#extras
3794     * @attr ref android.R.styleable#TextView_editorExtras
3795     */
3796    public Bundle getInputExtras(boolean create) {
3797        if (mInputContentType == null) {
3798            if (!create) return null;
3799            mInputContentType = new InputContentType();
3800        }
3801        if (mInputContentType.extras == null) {
3802            if (!create) return null;
3803            mInputContentType.extras = new Bundle();
3804        }
3805        return mInputContentType.extras;
3806    }
3807
3808    /**
3809     * Returns the error message that was set to be displayed with
3810     * {@link #setError}, or <code>null</code> if no error was set
3811     * or if it the error was cleared by the widget after user input.
3812     */
3813    public CharSequence getError() {
3814        return mError;
3815    }
3816
3817    /**
3818     * Sets the right-hand compound drawable of the TextView to the "error"
3819     * icon and sets an error message that will be displayed in a popup when
3820     * the TextView has focus.  The icon and error message will be reset to
3821     * null when any key events cause changes to the TextView's text.  If the
3822     * <code>error</code> is <code>null</code>, the error message and icon
3823     * will be cleared.
3824     */
3825    @android.view.RemotableViewMethod
3826    public void setError(CharSequence error) {
3827        if (error == null) {
3828            setError(null, null);
3829        } else {
3830            Drawable dr = getContext().getResources().
3831                getDrawable(com.android.internal.R.drawable.indicator_input_error);
3832
3833            dr.setBounds(0, 0, dr.getIntrinsicWidth(), dr.getIntrinsicHeight());
3834            setError(error, dr);
3835        }
3836    }
3837
3838    /**
3839     * Sets the right-hand compound drawable of the TextView to the specified
3840     * icon and sets an error message that will be displayed in a popup when
3841     * the TextView has focus.  The icon and error message will be reset to
3842     * null when any key events cause changes to the TextView's text.  The
3843     * drawable must already have had {@link Drawable#setBounds} set on it.
3844     * If the <code>error</code> is <code>null</code>, the error message will
3845     * be cleared (and you should provide a <code>null</code> icon as well).
3846     */
3847    public void setError(CharSequence error, Drawable icon) {
3848        error = TextUtils.stringOrSpannedString(error);
3849
3850        mError = error;
3851        mErrorWasChanged = true;
3852        final Drawables dr = mDrawables;
3853        if (dr != null) {
3854            switch (getResolvedLayoutDirection()) {
3855                default:
3856                case LAYOUT_DIRECTION_LTR:
3857                    setCompoundDrawables(dr.mDrawableLeft, dr.mDrawableTop, icon,
3858                            dr.mDrawableBottom);
3859                    break;
3860                case LAYOUT_DIRECTION_RTL:
3861                    setCompoundDrawables(icon, dr.mDrawableTop, dr.mDrawableRight,
3862                            dr.mDrawableBottom);
3863                    break;
3864            }
3865        } else {
3866            setCompoundDrawables(null, null, icon, null);
3867        }
3868
3869        if (error == null) {
3870            if (mPopup != null) {
3871                if (mPopup.isShowing()) {
3872                    mPopup.dismiss();
3873                }
3874
3875                mPopup = null;
3876            }
3877        } else {
3878            if (isFocused()) {
3879                showError();
3880            }
3881        }
3882    }
3883
3884    private void showError() {
3885        if (getWindowToken() == null) {
3886            mShowErrorAfterAttach = true;
3887            return;
3888        }
3889
3890        if (mPopup == null) {
3891            LayoutInflater inflater = LayoutInflater.from(getContext());
3892            final TextView err = (TextView) inflater.inflate(
3893                    com.android.internal.R.layout.textview_hint, null);
3894
3895            final float scale = getResources().getDisplayMetrics().density;
3896            mPopup = new ErrorPopup(err, (int) (200 * scale + 0.5f), (int) (50 * scale + 0.5f));
3897            mPopup.setFocusable(false);
3898            // The user is entering text, so the input method is needed.  We
3899            // don't want the popup to be displayed on top of it.
3900            mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);
3901        }
3902
3903        TextView tv = (TextView) mPopup.getContentView();
3904        chooseSize(mPopup, mError, tv);
3905        tv.setText(mError);
3906
3907        mPopup.showAsDropDown(this, getErrorX(), getErrorY());
3908        mPopup.fixDirection(mPopup.isAboveAnchor());
3909    }
3910
3911    private static class ErrorPopup extends PopupWindow {
3912        private boolean mAbove = false;
3913        private final TextView mView;
3914        private int mPopupInlineErrorBackgroundId = 0;
3915        private int mPopupInlineErrorAboveBackgroundId = 0;
3916
3917        ErrorPopup(TextView v, int width, int height) {
3918            super(v, width, height);
3919            mView = v;
3920            // Make sure the TextView has a background set as it will be used the first time it is
3921            // shown and positionned. Initialized with below background, which should have
3922            // dimensions identical to the above version for this to work (and is more likely).
3923            mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
3924                    com.android.internal.R.styleable.Theme_errorMessageBackground);
3925            mView.setBackgroundResource(mPopupInlineErrorBackgroundId);
3926        }
3927
3928        void fixDirection(boolean above) {
3929            mAbove = above;
3930
3931            if (above) {
3932                mPopupInlineErrorAboveBackgroundId =
3933                    getResourceId(mPopupInlineErrorAboveBackgroundId,
3934                            com.android.internal.R.styleable.Theme_errorMessageAboveBackground);
3935            } else {
3936                mPopupInlineErrorBackgroundId = getResourceId(mPopupInlineErrorBackgroundId,
3937                        com.android.internal.R.styleable.Theme_errorMessageBackground);
3938            }
3939
3940            mView.setBackgroundResource(above ? mPopupInlineErrorAboveBackgroundId :
3941                mPopupInlineErrorBackgroundId);
3942        }
3943
3944        private int getResourceId(int currentId, int index) {
3945            if (currentId == 0) {
3946                TypedArray styledAttributes = mView.getContext().obtainStyledAttributes(
3947                        R.styleable.Theme);
3948                currentId = styledAttributes.getResourceId(index, 0);
3949                styledAttributes.recycle();
3950            }
3951            return currentId;
3952        }
3953
3954        @Override
3955        public void update(int x, int y, int w, int h, boolean force) {
3956            super.update(x, y, w, h, force);
3957
3958            boolean above = isAboveAnchor();
3959            if (above != mAbove) {
3960                fixDirection(above);
3961            }
3962        }
3963    }
3964
3965    /**
3966     * Returns the Y offset to make the pointy top of the error point
3967     * at the middle of the error icon.
3968     */
3969    private int getErrorX() {
3970        /*
3971         * The "25" is the distance between the point and the right edge
3972         * of the background
3973         */
3974        final float scale = getResources().getDisplayMetrics().density;
3975
3976        final Drawables dr = mDrawables;
3977        return getWidth() - mPopup.getWidth() - getPaddingRight() -
3978                (dr != null ? dr.mDrawableSizeRight : 0) / 2 + (int) (25 * scale + 0.5f);
3979    }
3980
3981    /**
3982     * Returns the Y offset to make the pointy top of the error point
3983     * at the bottom of the error icon.
3984     */
3985    private int getErrorY() {
3986        /*
3987         * Compound, not extended, because the icon is not clipped
3988         * if the text height is smaller.
3989         */
3990        final int compoundPaddingTop = getCompoundPaddingTop();
3991        int vspace = mBottom - mTop - getCompoundPaddingBottom() - compoundPaddingTop;
3992
3993        final Drawables dr = mDrawables;
3994        int icontop = compoundPaddingTop +
3995                (vspace - (dr != null ? dr.mDrawableHeightRight : 0)) / 2;
3996
3997        /*
3998         * The "2" is the distance between the point and the top edge
3999         * of the background.
4000         */
4001        final float scale = getResources().getDisplayMetrics().density;
4002        return icontop + (dr != null ? dr.mDrawableHeightRight : 0) - getHeight() -
4003                (int) (2 * scale + 0.5f);
4004    }
4005
4006    private void hideError() {
4007        if (mPopup != null) {
4008            if (mPopup.isShowing()) {
4009                mPopup.dismiss();
4010            }
4011        }
4012
4013        mShowErrorAfterAttach = false;
4014    }
4015
4016    private void chooseSize(PopupWindow pop, CharSequence text, TextView tv) {
4017        int wid = tv.getPaddingLeft() + tv.getPaddingRight();
4018        int ht = tv.getPaddingTop() + tv.getPaddingBottom();
4019
4020        /*
4021         * Figure out how big the text would be if we laid it out to the
4022         * full width of this view minus the border.
4023         */
4024        int cap = getWidth() - wid;
4025        if (cap < 0) {
4026            cap = 200; // We must not be measured yet -- setFrame() will fix it.
4027        }
4028
4029        Layout l = new StaticLayout(text, tv.getPaint(), cap,
4030                                    Layout.Alignment.ALIGN_NORMAL, 1, 0, true);
4031        float max = 0;
4032        for (int i = 0; i < l.getLineCount(); i++) {
4033            max = Math.max(max, l.getLineWidth(i));
4034        }
4035
4036        /*
4037         * Now set the popup size to be big enough for the text plus the border.
4038         */
4039        pop.setWidth(wid + (int) Math.ceil(max));
4040        pop.setHeight(ht + l.getHeight());
4041    }
4042
4043
4044    @Override
4045    protected boolean setFrame(int l, int t, int r, int b) {
4046        boolean result = super.setFrame(l, t, r, b);
4047
4048        if (mPopup != null) {
4049            TextView tv = (TextView) mPopup.getContentView();
4050            chooseSize(mPopup, mError, tv);
4051            mPopup.update(this, getErrorX(), getErrorY(),
4052                          mPopup.getWidth(), mPopup.getHeight());
4053        }
4054
4055        restartMarqueeIfNeeded();
4056
4057        return result;
4058    }
4059
4060    private void restartMarqueeIfNeeded() {
4061        if (mRestartMarquee && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
4062            mRestartMarquee = false;
4063            startMarquee();
4064        }
4065    }
4066
4067    /**
4068     * Sets the list of input filters that will be used if the buffer is
4069     * Editable.  Has no effect otherwise.
4070     *
4071     * @attr ref android.R.styleable#TextView_maxLength
4072     */
4073    public void setFilters(InputFilter[] filters) {
4074        if (filters == null) {
4075            throw new IllegalArgumentException();
4076        }
4077
4078        mFilters = filters;
4079
4080        if (mText instanceof Editable) {
4081            setFilters((Editable) mText, filters);
4082        }
4083    }
4084
4085    /**
4086     * Sets the list of input filters on the specified Editable,
4087     * and includes mInput in the list if it is an InputFilter.
4088     */
4089    private void setFilters(Editable e, InputFilter[] filters) {
4090        if (mInput instanceof InputFilter) {
4091            InputFilter[] nf = new InputFilter[filters.length + 1];
4092
4093            System.arraycopy(filters, 0, nf, 0, filters.length);
4094            nf[filters.length] = (InputFilter) mInput;
4095
4096            e.setFilters(nf);
4097        } else {
4098            e.setFilters(filters);
4099        }
4100    }
4101
4102    /**
4103     * Returns the current list of input filters.
4104     */
4105    public InputFilter[] getFilters() {
4106        return mFilters;
4107    }
4108
4109    /////////////////////////////////////////////////////////////////////////
4110
4111    private int getVerticalOffset(boolean forceNormal) {
4112        int voffset = 0;
4113        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
4114
4115        Layout l = mLayout;
4116        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
4117            l = mHintLayout;
4118        }
4119
4120        if (gravity != Gravity.TOP) {
4121            int boxht;
4122
4123            if (l == mHintLayout) {
4124                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
4125                        getCompoundPaddingBottom();
4126            } else {
4127                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
4128                        getExtendedPaddingBottom();
4129            }
4130            int textht = l.getHeight();
4131
4132            if (textht < boxht) {
4133                if (gravity == Gravity.BOTTOM)
4134                    voffset = boxht - textht;
4135                else // (gravity == Gravity.CENTER_VERTICAL)
4136                    voffset = (boxht - textht) >> 1;
4137            }
4138        }
4139        return voffset;
4140    }
4141
4142    private int getBottomVerticalOffset(boolean forceNormal) {
4143        int voffset = 0;
4144        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
4145
4146        Layout l = mLayout;
4147        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
4148            l = mHintLayout;
4149        }
4150
4151        if (gravity != Gravity.BOTTOM) {
4152            int boxht;
4153
4154            if (l == mHintLayout) {
4155                boxht = getMeasuredHeight() - getCompoundPaddingTop() -
4156                        getCompoundPaddingBottom();
4157            } else {
4158                boxht = getMeasuredHeight() - getExtendedPaddingTop() -
4159                        getExtendedPaddingBottom();
4160            }
4161            int textht = l.getHeight();
4162
4163            if (textht < boxht) {
4164                if (gravity == Gravity.TOP)
4165                    voffset = boxht - textht;
4166                else // (gravity == Gravity.CENTER_VERTICAL)
4167                    voffset = (boxht - textht) >> 1;
4168            }
4169        }
4170        return voffset;
4171    }
4172
4173    private void invalidateCursorPath() {
4174        if (mHighlightPathBogus) {
4175            invalidateCursor();
4176        } else {
4177            final int horizontalPadding = getCompoundPaddingLeft();
4178            final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
4179
4180            if (mCursorCount == 0) {
4181                synchronized (sTempRect) {
4182                    /*
4183                     * The reason for this concern about the thickness of the
4184                     * cursor and doing the floor/ceil on the coordinates is that
4185                     * some EditTexts (notably textfields in the Browser) have
4186                     * anti-aliased text where not all the characters are
4187                     * necessarily at integer-multiple locations.  This should
4188                     * make sure the entire cursor gets invalidated instead of
4189                     * sometimes missing half a pixel.
4190                     */
4191                    float thick = FloatMath.ceil(mTextPaint.getStrokeWidth());
4192                    if (thick < 1.0f) {
4193                        thick = 1.0f;
4194                    }
4195
4196                    thick /= 2.0f;
4197
4198                    mHighlightPath.computeBounds(sTempRect, false);
4199
4200                    invalidate((int) FloatMath.floor(horizontalPadding + sTempRect.left - thick),
4201                            (int) FloatMath.floor(verticalPadding + sTempRect.top - thick),
4202                            (int) FloatMath.ceil(horizontalPadding + sTempRect.right + thick),
4203                            (int) FloatMath.ceil(verticalPadding + sTempRect.bottom + thick));
4204                }
4205            } else {
4206                for (int i = 0; i < mCursorCount; i++) {
4207                    Rect bounds = mCursorDrawable[i].getBounds();
4208                    invalidate(bounds.left + horizontalPadding, bounds.top + verticalPadding,
4209                            bounds.right + horizontalPadding, bounds.bottom + verticalPadding);
4210                }
4211            }
4212        }
4213    }
4214
4215    private void invalidateCursor() {
4216        int where = getSelectionEnd();
4217
4218        invalidateCursor(where, where, where);
4219    }
4220
4221    private void invalidateCursor(int a, int b, int c) {
4222        if (mLayout == null) {
4223            invalidate();
4224        } else {
4225            if (a >= 0 || b >= 0 || c >= 0) {
4226                int first = Math.min(Math.min(a, b), c);
4227                int last = Math.max(Math.max(a, b), c);
4228
4229                int line = mLayout.getLineForOffset(first);
4230                int top = mLayout.getLineTop(line);
4231
4232                // This is ridiculous, but the descent from the line above
4233                // can hang down into the line we really want to redraw,
4234                // so we have to invalidate part of the line above to make
4235                // sure everything that needs to be redrawn really is.
4236                // (But not the whole line above, because that would cause
4237                // the same problem with the descenders on the line above it!)
4238                if (line > 0) {
4239                    top -= mLayout.getLineDescent(line - 1);
4240                }
4241
4242                int line2;
4243
4244                if (first == last)
4245                    line2 = line;
4246                else
4247                    line2 = mLayout.getLineForOffset(last);
4248
4249                int bottom = mLayout.getLineTop(line2 + 1);
4250
4251                final int horizontalPadding = getCompoundPaddingLeft();
4252                final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
4253
4254                // If used, the cursor drawables can have an arbitrary dimension that can go beyond
4255                // the invalidated lines specified above.
4256                for (int i = 0; i < mCursorCount; i++) {
4257                    Rect bounds = mCursorDrawable[i].getBounds();
4258                    top = Math.min(top, bounds.top);
4259                    bottom = Math.max(bottom, bounds.bottom);
4260                    // Horizontal bounds are already full width, no need to update
4261                }
4262
4263                invalidate(horizontalPadding + mScrollX, top + verticalPadding,
4264                        horizontalPadding + mScrollX + getWidth() -
4265                        getCompoundPaddingLeft() - getCompoundPaddingRight(),
4266                        bottom + verticalPadding);
4267            }
4268        }
4269    }
4270
4271    private void registerForPreDraw() {
4272        final ViewTreeObserver observer = getViewTreeObserver();
4273
4274        if (mPreDrawState == PREDRAW_NOT_REGISTERED) {
4275            observer.addOnPreDrawListener(this);
4276            mPreDrawState = PREDRAW_PENDING;
4277        } else if (mPreDrawState == PREDRAW_DONE) {
4278            mPreDrawState = PREDRAW_PENDING;
4279        }
4280
4281        // else state is PREDRAW_PENDING, so keep waiting.
4282    }
4283
4284    /**
4285     * {@inheritDoc}
4286     */
4287    public boolean onPreDraw() {
4288        if (mPreDrawState != PREDRAW_PENDING) {
4289            return true;
4290        }
4291
4292        if (mLayout == null) {
4293            assumeLayout();
4294        }
4295
4296        boolean changed = false;
4297
4298        if (mMovement != null) {
4299            /* This code also provides auto-scrolling when a cursor is moved using a
4300             * CursorController (insertion point or selection limits).
4301             * For selection, ensure start or end is visible depending on controller's state.
4302             */
4303            int curs = getSelectionEnd();
4304            // Do not create the controller if it is not already created.
4305            if (mSelectionModifierCursorController != null &&
4306                    mSelectionModifierCursorController.isSelectionStartDragged()) {
4307                curs = getSelectionStart();
4308            }
4309
4310            /*
4311             * TODO: This should really only keep the end in view if
4312             * it already was before the text changed.  I'm not sure
4313             * of a good way to tell from here if it was.
4314             */
4315            if (curs < 0 &&
4316                  (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
4317                curs = mText.length();
4318            }
4319
4320            if (curs >= 0) {
4321                changed = bringPointIntoView(curs);
4322            }
4323        } else {
4324            changed = bringTextIntoView();
4325        }
4326
4327        // This has to be checked here since:
4328        // - onFocusChanged cannot start it when focus is given to a view with selected text (after
4329        //   a screen rotation) since layout is not yet initialized at that point.
4330        if (mCreatedWithASelection) {
4331            startSelectionActionMode();
4332            mCreatedWithASelection = false;
4333        }
4334
4335        // Phone specific code (there is no ExtractEditText on tablets).
4336        // ExtractEditText does not call onFocus when it is displayed, and mHasSelectionOnFocus can
4337        // not be set. Do the test here instead.
4338        if (this instanceof ExtractEditText && hasSelection()) {
4339            startSelectionActionMode();
4340        }
4341
4342        mPreDrawState = PREDRAW_DONE;
4343        return !changed;
4344    }
4345
4346    @Override
4347    protected void onAttachedToWindow() {
4348        super.onAttachedToWindow();
4349
4350        mTemporaryDetach = false;
4351
4352        if (mShowErrorAfterAttach) {
4353            showError();
4354            mShowErrorAfterAttach = false;
4355        }
4356
4357        final ViewTreeObserver observer = getViewTreeObserver();
4358        // No need to create the controller.
4359        // The get method will add the listener on controller creation.
4360        if (mInsertionPointCursorController != null) {
4361            observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
4362        }
4363        if (mSelectionModifierCursorController != null) {
4364            observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
4365        }
4366
4367        // Resolve drawables as the layout direction has been resolved
4368        resolveDrawables();
4369    }
4370
4371    @Override
4372    protected void onDetachedFromWindow() {
4373        super.onDetachedFromWindow();
4374
4375        final ViewTreeObserver observer = getViewTreeObserver();
4376        if (mPreDrawState != PREDRAW_NOT_REGISTERED) {
4377            observer.removeOnPreDrawListener(this);
4378            mPreDrawState = PREDRAW_NOT_REGISTERED;
4379        }
4380
4381        if (mError != null) {
4382            hideError();
4383        }
4384
4385        if (mBlink != null) {
4386            mBlink.removeCallbacks(mBlink);
4387        }
4388
4389        if (mInsertionPointCursorController != null) {
4390            mInsertionPointCursorController.onDetached();
4391        }
4392
4393        if (mSelectionModifierCursorController != null) {
4394            mSelectionModifierCursorController.onDetached();
4395        }
4396
4397        hideControllers();
4398
4399        resetResolvedDrawables();
4400    }
4401
4402    @Override
4403    protected boolean isPaddingOffsetRequired() {
4404        return mShadowRadius != 0 || mDrawables != null;
4405    }
4406
4407    @Override
4408    protected int getLeftPaddingOffset() {
4409        return getCompoundPaddingLeft() - mPaddingLeft +
4410                (int) Math.min(0, mShadowDx - mShadowRadius);
4411    }
4412
4413    @Override
4414    protected int getTopPaddingOffset() {
4415        return (int) Math.min(0, mShadowDy - mShadowRadius);
4416    }
4417
4418    @Override
4419    protected int getBottomPaddingOffset() {
4420        return (int) Math.max(0, mShadowDy + mShadowRadius);
4421    }
4422
4423    @Override
4424    protected int getRightPaddingOffset() {
4425        return -(getCompoundPaddingRight() - mPaddingRight) +
4426                (int) Math.max(0, mShadowDx + mShadowRadius);
4427    }
4428
4429    @Override
4430    protected boolean verifyDrawable(Drawable who) {
4431        final boolean verified = super.verifyDrawable(who);
4432        if (!verified && mDrawables != null) {
4433            return who == mDrawables.mDrawableLeft || who == mDrawables.mDrawableTop ||
4434                    who == mDrawables.mDrawableRight || who == mDrawables.mDrawableBottom ||
4435                    who == mDrawables.mDrawableStart || who == mDrawables.mDrawableEnd;
4436        }
4437        return verified;
4438    }
4439
4440    @Override
4441    public void jumpDrawablesToCurrentState() {
4442        super.jumpDrawablesToCurrentState();
4443        if (mDrawables != null) {
4444            if (mDrawables.mDrawableLeft != null) {
4445                mDrawables.mDrawableLeft.jumpToCurrentState();
4446            }
4447            if (mDrawables.mDrawableTop != null) {
4448                mDrawables.mDrawableTop.jumpToCurrentState();
4449            }
4450            if (mDrawables.mDrawableRight != null) {
4451                mDrawables.mDrawableRight.jumpToCurrentState();
4452            }
4453            if (mDrawables.mDrawableBottom != null) {
4454                mDrawables.mDrawableBottom.jumpToCurrentState();
4455            }
4456            if (mDrawables.mDrawableStart != null) {
4457                mDrawables.mDrawableStart.jumpToCurrentState();
4458            }
4459            if (mDrawables.mDrawableEnd != null) {
4460                mDrawables.mDrawableEnd.jumpToCurrentState();
4461            }
4462        }
4463    }
4464
4465    @Override
4466    public void invalidateDrawable(Drawable drawable) {
4467        if (verifyDrawable(drawable)) {
4468            final Rect dirty = drawable.getBounds();
4469            int scrollX = mScrollX;
4470            int scrollY = mScrollY;
4471
4472            // IMPORTANT: The coordinates below are based on the coordinates computed
4473            // for each compound drawable in onDraw(). Make sure to update each section
4474            // accordingly.
4475            final TextView.Drawables drawables = mDrawables;
4476            if (drawables != null) {
4477                if (drawable == drawables.mDrawableLeft) {
4478                    final int compoundPaddingTop = getCompoundPaddingTop();
4479                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4480                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4481
4482                    scrollX += mPaddingLeft;
4483                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightLeft) / 2;
4484                } else if (drawable == drawables.mDrawableRight) {
4485                    final int compoundPaddingTop = getCompoundPaddingTop();
4486                    final int compoundPaddingBottom = getCompoundPaddingBottom();
4487                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
4488
4489                    scrollX += (mRight - mLeft - mPaddingRight - drawables.mDrawableSizeRight);
4490                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightRight) / 2;
4491                } else if (drawable == drawables.mDrawableTop) {
4492                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4493                    final int compoundPaddingRight = getCompoundPaddingRight();
4494                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4495
4496                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthTop) / 2;
4497                    scrollY += mPaddingTop;
4498                } else if (drawable == drawables.mDrawableBottom) {
4499                    final int compoundPaddingLeft = getCompoundPaddingLeft();
4500                    final int compoundPaddingRight = getCompoundPaddingRight();
4501                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
4502
4503                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthBottom) / 2;
4504                    scrollY += (mBottom - mTop - mPaddingBottom - drawables.mDrawableSizeBottom);
4505                }
4506            }
4507
4508            invalidate(dirty.left + scrollX, dirty.top + scrollY,
4509                    dirty.right + scrollX, dirty.bottom + scrollY);
4510        }
4511    }
4512
4513    /**
4514     * @hide
4515     */
4516    @Override
4517    public int getResolvedLayoutDirection(Drawable who) {
4518        if (who == null) return View.LAYOUT_DIRECTION_LTR;
4519        if (mDrawables != null) {
4520            final Drawables drawables = mDrawables;
4521            if (who == drawables.mDrawableLeft || who == drawables.mDrawableRight ||
4522                who == drawables.mDrawableTop || who == drawables.mDrawableBottom ||
4523                who == drawables.mDrawableStart || who == drawables.mDrawableEnd) {
4524                return getResolvedLayoutDirection();
4525            }
4526        }
4527        return super.getResolvedLayoutDirection(who);
4528    }
4529
4530    @Override
4531    protected boolean onSetAlpha(int alpha) {
4532        // Alpha is supported if and only if the drawing can be done in one pass.
4533        // TODO text with spans with a background color currently do not respect this alpha.
4534        if (getBackground() == null) {
4535            mCurrentAlpha = alpha;
4536            final Drawables dr = mDrawables;
4537            if (dr != null) {
4538                if (dr.mDrawableLeft != null) dr.mDrawableLeft.mutate().setAlpha(alpha);
4539                if (dr.mDrawableTop != null) dr.mDrawableTop.mutate().setAlpha(alpha);
4540                if (dr.mDrawableRight != null) dr.mDrawableRight.mutate().setAlpha(alpha);
4541                if (dr.mDrawableBottom != null) dr.mDrawableBottom.mutate().setAlpha(alpha);
4542                if (dr.mDrawableStart != null) dr.mDrawableStart.mutate().setAlpha(alpha);
4543                if (dr.mDrawableEnd != null) dr.mDrawableEnd.mutate().setAlpha(alpha);
4544            }
4545            return true;
4546        }
4547
4548        mCurrentAlpha = 255;
4549        return false;
4550    }
4551
4552    /**
4553     * When a TextView is used to display a useful piece of information to the user (such as a
4554     * contact's address), it should be made selectable, so that the user can select and copy this
4555     * content.
4556     *
4557     * Use {@link #setTextIsSelectable(boolean)} or the
4558     * {@link android.R.styleable#TextView_textIsSelectable} XML attribute to make this TextView
4559     * selectable (text is not selectable by default).
4560     *
4561     * Note that this method simply returns the state of this flag. Although this flag has to be set
4562     * in order to select text in non-editable TextView, the content of an {@link EditText} can
4563     * always be selected, independently of the value of this flag.
4564     *
4565     * @return True if the text displayed in this TextView can be selected by the user.
4566     *
4567     * @attr ref android.R.styleable#TextView_textIsSelectable
4568     */
4569    public boolean isTextSelectable() {
4570        return mTextIsSelectable;
4571    }
4572
4573    /**
4574     * Sets whether or not (default) the content of this view is selectable by the user.
4575     *
4576     * Note that this methods affect the {@link #setFocusable(boolean)},
4577     * {@link #setFocusableInTouchMode(boolean)} {@link #setClickable(boolean)} and
4578     * {@link #setLongClickable(boolean)} states and you may want to restore these if they were
4579     * customized.
4580     *
4581     * See {@link #isTextSelectable} for details.
4582     *
4583     * @param selectable Whether or not the content of this TextView should be selectable.
4584     */
4585    public void setTextIsSelectable(boolean selectable) {
4586        if (mTextIsSelectable == selectable) return;
4587
4588        mTextIsSelectable = selectable;
4589
4590        setFocusableInTouchMode(selectable);
4591        setFocusable(selectable);
4592        setClickable(selectable);
4593        setLongClickable(selectable);
4594
4595        // mInputType is already EditorInfo.TYPE_NULL and mInput is null;
4596
4597        setMovementMethod(selectable ? ArrowKeyMovementMethod.getInstance() : null);
4598        setText(getText(), selectable ? BufferType.SPANNABLE : BufferType.NORMAL);
4599
4600        // Called by setText above, but safer in case of future code changes
4601        prepareCursorControllers();
4602    }
4603
4604    @Override
4605    protected int[] onCreateDrawableState(int extraSpace) {
4606        final int[] drawableState;
4607
4608        if (mSingleLine) {
4609            drawableState = super.onCreateDrawableState(extraSpace);
4610        } else {
4611            drawableState = super.onCreateDrawableState(extraSpace + 1);
4612            mergeDrawableStates(drawableState, MULTILINE_STATE_SET);
4613        }
4614
4615        if (mTextIsSelectable) {
4616            // Disable pressed state, which was introduced when TextView was made clickable.
4617            // Prevents text color change.
4618            // setClickable(false) would have a similar effect, but it also disables focus changes
4619            // and long press actions, which are both needed by text selection.
4620            final int length = drawableState.length;
4621            for (int i = 0; i < length; i++) {
4622                if (drawableState[i] == R.attr.state_pressed) {
4623                    final int[] nonPressedState = new int[length - 1];
4624                    System.arraycopy(drawableState, 0, nonPressedState, 0, i);
4625                    System.arraycopy(drawableState, i + 1, nonPressedState, i, length - i - 1);
4626                    return nonPressedState;
4627                }
4628            }
4629        }
4630
4631        return drawableState;
4632    }
4633
4634    @Override
4635    protected void onDraw(Canvas canvas) {
4636        if (mPreDrawState == PREDRAW_DONE) {
4637            final ViewTreeObserver observer = getViewTreeObserver();
4638            observer.removeOnPreDrawListener(this);
4639            mPreDrawState = PREDRAW_NOT_REGISTERED;
4640        }
4641
4642        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return;
4643
4644        restartMarqueeIfNeeded();
4645
4646        // Draw the background for this view
4647        super.onDraw(canvas);
4648
4649        final int compoundPaddingLeft = getCompoundPaddingLeft();
4650        final int compoundPaddingTop = getCompoundPaddingTop();
4651        final int compoundPaddingRight = getCompoundPaddingRight();
4652        final int compoundPaddingBottom = getCompoundPaddingBottom();
4653        final int scrollX = mScrollX;
4654        final int scrollY = mScrollY;
4655        final int right = mRight;
4656        final int left = mLeft;
4657        final int bottom = mBottom;
4658        final int top = mTop;
4659
4660        final Drawables dr = mDrawables;
4661        if (dr != null) {
4662            /*
4663             * Compound, not extended, because the icon is not clipped
4664             * if the text height is smaller.
4665             */
4666
4667            int vspace = bottom - top - compoundPaddingBottom - compoundPaddingTop;
4668            int hspace = right - left - compoundPaddingRight - compoundPaddingLeft;
4669
4670            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4671            // Make sure to update invalidateDrawable() when changing this code.
4672            if (dr.mDrawableLeft != null) {
4673                canvas.save();
4674                canvas.translate(scrollX + mPaddingLeft,
4675                                 scrollY + compoundPaddingTop +
4676                                 (vspace - dr.mDrawableHeightLeft) / 2);
4677                dr.mDrawableLeft.draw(canvas);
4678                canvas.restore();
4679            }
4680
4681            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4682            // Make sure to update invalidateDrawable() when changing this code.
4683            if (dr.mDrawableRight != null) {
4684                canvas.save();
4685                canvas.translate(scrollX + right - left - mPaddingRight - dr.mDrawableSizeRight,
4686                         scrollY + compoundPaddingTop + (vspace - dr.mDrawableHeightRight) / 2);
4687                dr.mDrawableRight.draw(canvas);
4688                canvas.restore();
4689            }
4690
4691            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4692            // Make sure to update invalidateDrawable() when changing this code.
4693            if (dr.mDrawableTop != null) {
4694                canvas.save();
4695                canvas.translate(scrollX + compoundPaddingLeft + (hspace - dr.mDrawableWidthTop) / 2,
4696                        scrollY + mPaddingTop);
4697                dr.mDrawableTop.draw(canvas);
4698                canvas.restore();
4699            }
4700
4701            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
4702            // Make sure to update invalidateDrawable() when changing this code.
4703            if (dr.mDrawableBottom != null) {
4704                canvas.save();
4705                canvas.translate(scrollX + compoundPaddingLeft +
4706                        (hspace - dr.mDrawableWidthBottom) / 2,
4707                         scrollY + bottom - top - mPaddingBottom - dr.mDrawableSizeBottom);
4708                dr.mDrawableBottom.draw(canvas);
4709                canvas.restore();
4710            }
4711        }
4712
4713        int color = mCurTextColor;
4714
4715        if (mLayout == null) {
4716            assumeLayout();
4717        }
4718
4719        Layout layout = mLayout;
4720        int cursorcolor = color;
4721
4722        if (mHint != null && mText.length() == 0) {
4723            if (mHintTextColor != null) {
4724                color = mCurHintTextColor;
4725            }
4726
4727            layout = mHintLayout;
4728        }
4729
4730        mTextPaint.setColor(color);
4731        if (mCurrentAlpha != 255) {
4732            // If set, the alpha will override the color's alpha. Multiply the alphas.
4733            mTextPaint.setAlpha((mCurrentAlpha * Color.alpha(color)) / 255);
4734        }
4735        mTextPaint.drawableState = getDrawableState();
4736
4737        canvas.save();
4738        /*  Would be faster if we didn't have to do this. Can we chop the
4739            (displayable) text so that we don't need to do this ever?
4740        */
4741
4742        int extendedPaddingTop = getExtendedPaddingTop();
4743        int extendedPaddingBottom = getExtendedPaddingBottom();
4744
4745        float clipLeft = compoundPaddingLeft + scrollX;
4746        float clipTop = extendedPaddingTop + scrollY;
4747        float clipRight = right - left - compoundPaddingRight + scrollX;
4748        float clipBottom = bottom - top - extendedPaddingBottom + scrollY;
4749
4750        if (mShadowRadius != 0) {
4751            clipLeft += Math.min(0, mShadowDx - mShadowRadius);
4752            clipRight += Math.max(0, mShadowDx + mShadowRadius);
4753
4754            clipTop += Math.min(0, mShadowDy - mShadowRadius);
4755            clipBottom += Math.max(0, mShadowDy + mShadowRadius);
4756        }
4757
4758        canvas.clipRect(clipLeft, clipTop, clipRight, clipBottom);
4759
4760        int voffsetText = 0;
4761        int voffsetCursor = 0;
4762
4763        // translate in by our padding
4764        {
4765            /* shortcircuit calling getVerticaOffset() */
4766            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
4767                voffsetText = getVerticalOffset(false);
4768                voffsetCursor = getVerticalOffset(true);
4769            }
4770            canvas.translate(compoundPaddingLeft, extendedPaddingTop + voffsetText);
4771        }
4772
4773        final int layoutDirection = getResolvedLayoutDirection();
4774        final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
4775        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
4776            if (!mSingleLine && getLineCount() == 1 && canMarquee() &&
4777                    (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) != Gravity.LEFT) {
4778                canvas.translate(mLayout.getLineRight(0) - (mRight - mLeft -
4779                        getCompoundPaddingLeft() - getCompoundPaddingRight()), 0.0f);
4780            }
4781
4782            if (mMarquee != null && mMarquee.isRunning()) {
4783                canvas.translate(-mMarquee.mScroll, 0.0f);
4784            }
4785        }
4786
4787        Path highlight = null;
4788        int selStart = -1, selEnd = -1;
4789        boolean drawCursor = false;
4790
4791        //  If there is no movement method, then there can be no selection.
4792        //  Check that first and attempt to skip everything having to do with
4793        //  the cursor.
4794        //  XXX This is not strictly true -- a program could set the
4795        //  selection manually if it really wanted to.
4796        if (mMovement != null && (isFocused() || isPressed())) {
4797            selStart = getSelectionStart();
4798            selEnd = getSelectionEnd();
4799
4800            if (selStart >= 0) {
4801                if (mHighlightPath == null)
4802                    mHighlightPath = new Path();
4803
4804                if (selStart == selEnd) {
4805                    if (isCursorVisible() &&
4806                            (SystemClock.uptimeMillis() - mShowCursor) % (2 * BLINK) < BLINK) {
4807                        if (mHighlightPathBogus) {
4808                            mHighlightPath.reset();
4809                            mLayout.getCursorPath(selStart, mHighlightPath, mText);
4810                            updateCursorsPositions();
4811                            mHighlightPathBogus = false;
4812                        }
4813
4814                        // XXX should pass to skin instead of drawing directly
4815                        mHighlightPaint.setColor(cursorcolor);
4816                        if (mCurrentAlpha != 255) {
4817                            mHighlightPaint.setAlpha(
4818                                    (mCurrentAlpha * Color.alpha(cursorcolor)) / 255);
4819                        }
4820                        mHighlightPaint.setStyle(Paint.Style.STROKE);
4821                        highlight = mHighlightPath;
4822                        drawCursor = mCursorCount > 0;
4823                    }
4824                } else if (textCanBeSelected()) {
4825                    if (mHighlightPathBogus) {
4826                        mHighlightPath.reset();
4827                        mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
4828                        mHighlightPathBogus = false;
4829                    }
4830
4831                    // XXX should pass to skin instead of drawing directly
4832                    mHighlightPaint.setColor(mHighlightColor);
4833                    if (mCurrentAlpha != 255) {
4834                        mHighlightPaint.setAlpha(
4835                                (mCurrentAlpha * Color.alpha(mHighlightColor)) / 255);
4836                    }
4837                    mHighlightPaint.setStyle(Paint.Style.FILL);
4838
4839                    highlight = mHighlightPath;
4840                }
4841            }
4842        }
4843
4844        /*  Comment out until we decide what to do about animations
4845        boolean isLinearTextOn = false;
4846        if (currentTransformation != null) {
4847            isLinearTextOn = mTextPaint.isLinearTextOn();
4848            Matrix m = currentTransformation.getMatrix();
4849            if (!m.isIdentity()) {
4850                // mTextPaint.setLinearTextOn(true);
4851            }
4852        }
4853        */
4854
4855        final InputMethodState ims = mInputMethodState;
4856        final int cursorOffsetVertical = voffsetCursor - voffsetText;
4857        if (ims != null && ims.mBatchEditNesting == 0) {
4858            InputMethodManager imm = InputMethodManager.peekInstance();
4859            if (imm != null) {
4860                if (imm.isActive(this)) {
4861                    boolean reported = false;
4862                    if (ims.mContentChanged || ims.mSelectionModeChanged) {
4863                        // We are in extract mode and the content has changed
4864                        // in some way... just report complete new text to the
4865                        // input method.
4866                        reported = reportExtractedText();
4867                    }
4868                    if (!reported && highlight != null) {
4869                        int candStart = -1;
4870                        int candEnd = -1;
4871                        if (mText instanceof Spannable) {
4872                            Spannable sp = (Spannable)mText;
4873                            candStart = EditableInputConnection.getComposingSpanStart(sp);
4874                            candEnd = EditableInputConnection.getComposingSpanEnd(sp);
4875                        }
4876                        imm.updateSelection(this, selStart, selEnd, candStart, candEnd);
4877                    }
4878                }
4879
4880                if (imm.isWatchingCursor(this) && highlight != null) {
4881                    highlight.computeBounds(ims.mTmpRectF, true);
4882                    ims.mTmpOffset[0] = ims.mTmpOffset[1] = 0;
4883
4884                    canvas.getMatrix().mapPoints(ims.mTmpOffset);
4885                    ims.mTmpRectF.offset(ims.mTmpOffset[0], ims.mTmpOffset[1]);
4886
4887                    ims.mTmpRectF.offset(0, cursorOffsetVertical);
4888
4889                    ims.mCursorRectInWindow.set((int)(ims.mTmpRectF.left + 0.5),
4890                            (int)(ims.mTmpRectF.top + 0.5),
4891                            (int)(ims.mTmpRectF.right + 0.5),
4892                            (int)(ims.mTmpRectF.bottom + 0.5));
4893
4894                    imm.updateCursor(this,
4895                            ims.mCursorRectInWindow.left, ims.mCursorRectInWindow.top,
4896                            ims.mCursorRectInWindow.right, ims.mCursorRectInWindow.bottom);
4897                }
4898            }
4899        }
4900
4901        if (mCorrectionHighlighter != null) {
4902            mCorrectionHighlighter.draw(canvas, cursorOffsetVertical);
4903        }
4904
4905        if (drawCursor) {
4906            drawCursor(canvas, cursorOffsetVertical);
4907            // Rely on the drawable entirely, do not draw the cursor line.
4908            // Has to be done after the IMM related code above which relies on the highlight.
4909            highlight = null;
4910        }
4911
4912        layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
4913
4914        if (mMarquee != null && mMarquee.shouldDrawGhost()) {
4915            canvas.translate((int) mMarquee.getGhostOffset(), 0.0f);
4916            layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
4917        }
4918
4919        /*  Comment out until we decide what to do about animations
4920        if (currentTransformation != null) {
4921            mTextPaint.setLinearTextOn(isLinearTextOn);
4922        }
4923        */
4924
4925        canvas.restore();
4926    }
4927
4928    private void updateCursorsPositions() {
4929        if (mCursorDrawableRes == 0) {
4930            mCursorCount = 0;
4931            return;
4932        }
4933
4934        final int offset = getSelectionStart();
4935        final int line = mLayout.getLineForOffset(offset);
4936        final int top = mLayout.getLineTop(line);
4937        final int bottom = mLayout.getLineTop(line + 1);
4938
4939        mCursorCount = mLayout.isLevelBoundary(offset) ? 2 : 1;
4940
4941        int middle = bottom;
4942        if (mCursorCount == 2) {
4943            // Similar to what is done in {@link Layout.#getCursorPath(int, Path, CharSequence)}
4944            middle = (top + bottom) >> 1;
4945        }
4946
4947        updateCursorPosition(0, top, middle, mLayout.getPrimaryHorizontal(offset));
4948
4949        if (mCursorCount == 2) {
4950            updateCursorPosition(1, middle, bottom, mLayout.getSecondaryHorizontal(offset));
4951        }
4952    }
4953
4954    private void updateCursorPosition(int cursorIndex, int top, int bottom, float horizontal) {
4955        if (mCursorDrawable[cursorIndex] == null)
4956            mCursorDrawable[cursorIndex] = mContext.getResources().getDrawable(mCursorDrawableRes);
4957
4958        if (mTempRect == null) mTempRect = new Rect();
4959
4960        mCursorDrawable[cursorIndex].getPadding(mTempRect);
4961        final int width = mCursorDrawable[cursorIndex].getIntrinsicWidth();
4962        horizontal = Math.max(0.5f, horizontal - 0.5f);
4963        final int left = (int) (horizontal) - mTempRect.left;
4964        mCursorDrawable[cursorIndex].setBounds(left, top - mTempRect.top, left + width,
4965                bottom + mTempRect.bottom);
4966    }
4967
4968    private void drawCursor(Canvas canvas, int cursorOffsetVertical) {
4969        final boolean translate = cursorOffsetVertical != 0;
4970        if (translate) canvas.translate(0, cursorOffsetVertical);
4971        for (int i = 0; i < mCursorCount; i++) {
4972            mCursorDrawable[i].draw(canvas);
4973        }
4974        if (translate) canvas.translate(0, -cursorOffsetVertical);
4975    }
4976
4977    @Override
4978    public void getFocusedRect(Rect r) {
4979        if (mLayout == null) {
4980            super.getFocusedRect(r);
4981            return;
4982        }
4983
4984        int sel = getSelectionEnd();
4985        if (sel < 0) {
4986            super.getFocusedRect(r);
4987            return;
4988        }
4989
4990        int line = mLayout.getLineForOffset(sel);
4991        r.top = mLayout.getLineTop(line);
4992        r.bottom = mLayout.getLineBottom(line);
4993
4994        r.left = (int) mLayout.getPrimaryHorizontal(sel);
4995        r.right = r.left + 1;
4996
4997        // Adjust for padding and gravity.
4998        int paddingLeft = getCompoundPaddingLeft();
4999        int paddingTop = getExtendedPaddingTop();
5000        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5001            paddingTop += getVerticalOffset(false);
5002        }
5003        r.offset(paddingLeft, paddingTop);
5004    }
5005
5006    /**
5007     * Return the number of lines of text, or 0 if the internal Layout has not
5008     * been built.
5009     */
5010    public int getLineCount() {
5011        return mLayout != null ? mLayout.getLineCount() : 0;
5012    }
5013
5014    /**
5015     * Return the baseline for the specified line (0...getLineCount() - 1)
5016     * If bounds is not null, return the top, left, right, bottom extents
5017     * of the specified line in it. If the internal Layout has not been built,
5018     * return 0 and set bounds to (0, 0, 0, 0)
5019     * @param line which line to examine (0..getLineCount() - 1)
5020     * @param bounds Optional. If not null, it returns the extent of the line
5021     * @return the Y-coordinate of the baseline
5022     */
5023    public int getLineBounds(int line, Rect bounds) {
5024        if (mLayout == null) {
5025            if (bounds != null) {
5026                bounds.set(0, 0, 0, 0);
5027            }
5028            return 0;
5029        }
5030        else {
5031            int baseline = mLayout.getLineBounds(line, bounds);
5032
5033            int voffset = getExtendedPaddingTop();
5034            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5035                voffset += getVerticalOffset(true);
5036            }
5037            if (bounds != null) {
5038                bounds.offset(getCompoundPaddingLeft(), voffset);
5039            }
5040            return baseline + voffset;
5041        }
5042    }
5043
5044    @Override
5045    public int getBaseline() {
5046        if (mLayout == null) {
5047            return super.getBaseline();
5048        }
5049
5050        int voffset = 0;
5051        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5052            voffset = getVerticalOffset(true);
5053        }
5054
5055        return getExtendedPaddingTop() + voffset + mLayout.getLineBaseline(0);
5056    }
5057
5058    @Override
5059    public boolean onKeyDown(int keyCode, KeyEvent event) {
5060        int which = doKeyDown(keyCode, event, null);
5061        if (which == 0) {
5062            // Go through default dispatching.
5063            return super.onKeyDown(keyCode, event);
5064        }
5065
5066        return true;
5067    }
5068
5069    @Override
5070    public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) {
5071        KeyEvent down = KeyEvent.changeAction(event, KeyEvent.ACTION_DOWN);
5072
5073        int which = doKeyDown(keyCode, down, event);
5074        if (which == 0) {
5075            // Go through default dispatching.
5076            return super.onKeyMultiple(keyCode, repeatCount, event);
5077        }
5078        if (which == -1) {
5079            // Consumed the whole thing.
5080            return true;
5081        }
5082
5083        repeatCount--;
5084
5085        // We are going to dispatch the remaining events to either the input
5086        // or movement method.  To do this, we will just send a repeated stream
5087        // of down and up events until we have done the complete repeatCount.
5088        // It would be nice if those interfaces had an onKeyMultiple() method,
5089        // but adding that is a more complicated change.
5090        KeyEvent up = KeyEvent.changeAction(event, KeyEvent.ACTION_UP);
5091        if (which == 1) {
5092            mInput.onKeyUp(this, (Editable)mText, keyCode, up);
5093            while (--repeatCount > 0) {
5094                mInput.onKeyDown(this, (Editable)mText, keyCode, down);
5095                mInput.onKeyUp(this, (Editable)mText, keyCode, up);
5096            }
5097            hideErrorIfUnchanged();
5098
5099        } else if (which == 2) {
5100            mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
5101            while (--repeatCount > 0) {
5102                mMovement.onKeyDown(this, (Spannable)mText, keyCode, down);
5103                mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
5104            }
5105        }
5106
5107        return true;
5108    }
5109
5110    /**
5111     * Returns true if pressing ENTER in this field advances focus instead
5112     * of inserting the character.  This is true mostly in single-line fields,
5113     * but also in mail addresses and subjects which will display on multiple
5114     * lines but where it doesn't make sense to insert newlines.
5115     */
5116    private boolean shouldAdvanceFocusOnEnter() {
5117        if (mInput == null) {
5118            return false;
5119        }
5120
5121        if (mSingleLine) {
5122            return true;
5123        }
5124
5125        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
5126            int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
5127            if (variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_ADDRESS
5128                    || variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT) {
5129                return true;
5130            }
5131        }
5132
5133        return false;
5134    }
5135
5136    /**
5137     * Returns true if pressing TAB in this field advances focus instead
5138     * of inserting the character.  Insert tabs only in multi-line editors.
5139     */
5140    private boolean shouldAdvanceFocusOnTab() {
5141        if (mInput != null && !mSingleLine) {
5142            if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
5143                int variation = mInputType & EditorInfo.TYPE_MASK_VARIATION;
5144                if (variation == EditorInfo.TYPE_TEXT_FLAG_IME_MULTI_LINE
5145                        || variation == EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE) {
5146                    return false;
5147                }
5148            }
5149        }
5150        return true;
5151    }
5152
5153    private int doKeyDown(int keyCode, KeyEvent event, KeyEvent otherEvent) {
5154        if (!isEnabled()) {
5155            return 0;
5156        }
5157
5158        switch (keyCode) {
5159            case KeyEvent.KEYCODE_ENTER:
5160                mEnterKeyIsDown = true;
5161                if (event.hasNoModifiers()) {
5162                    // When mInputContentType is set, we know that we are
5163                    // running in a "modern" cupcake environment, so don't need
5164                    // to worry about the application trying to capture
5165                    // enter key events.
5166                    if (mInputContentType != null) {
5167                        // If there is an action listener, given them a
5168                        // chance to consume the event.
5169                        if (mInputContentType.onEditorActionListener != null &&
5170                                mInputContentType.onEditorActionListener.onEditorAction(
5171                                this, EditorInfo.IME_NULL, event)) {
5172                            mInputContentType.enterDown = true;
5173                            // We are consuming the enter key for them.
5174                            return -1;
5175                        }
5176                    }
5177
5178                    // If our editor should move focus when enter is pressed, or
5179                    // this is a generated event from an IME action button, then
5180                    // don't let it be inserted into the text.
5181                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
5182                            || shouldAdvanceFocusOnEnter()) {
5183                        if (mOnClickListener != null) {
5184                            return 0;
5185                        }
5186                        return -1;
5187                    }
5188                }
5189                break;
5190
5191            case KeyEvent.KEYCODE_DPAD_CENTER:
5192                mDPadCenterIsDown = true;
5193                if (event.hasNoModifiers()) {
5194                    if (shouldAdvanceFocusOnEnter()) {
5195                        return 0;
5196                    }
5197                }
5198                break;
5199
5200            case KeyEvent.KEYCODE_TAB:
5201                if (event.hasNoModifiers() || event.hasModifiers(KeyEvent.META_SHIFT_ON)) {
5202                    if (shouldAdvanceFocusOnTab()) {
5203                        return 0;
5204                    }
5205                }
5206                break;
5207
5208                // Has to be done on key down (and not on key up) to correctly be intercepted.
5209            case KeyEvent.KEYCODE_BACK:
5210                if (mSelectionActionMode != null) {
5211                    stopSelectionActionMode();
5212                    return -1;
5213                }
5214                break;
5215        }
5216
5217        if (mInput != null) {
5218            resetErrorChangedFlag();
5219
5220            boolean doDown = true;
5221            if (otherEvent != null) {
5222                try {
5223                    beginBatchEdit();
5224                    final boolean handled = mInput.onKeyOther(this, (Editable) mText, otherEvent);
5225                    hideErrorIfUnchanged();
5226                    doDown = false;
5227                    if (handled) {
5228                        return -1;
5229                    }
5230                } catch (AbstractMethodError e) {
5231                    // onKeyOther was added after 1.0, so if it isn't
5232                    // implemented we need to try to dispatch as a regular down.
5233                } finally {
5234                    endBatchEdit();
5235                }
5236            }
5237
5238            if (doDown) {
5239                beginBatchEdit();
5240                final boolean handled = mInput.onKeyDown(this, (Editable) mText, keyCode, event);
5241                endBatchEdit();
5242                hideErrorIfUnchanged();
5243                if (handled) return 1;
5244            }
5245        }
5246
5247        // bug 650865: sometimes we get a key event before a layout.
5248        // don't try to move around if we don't know the layout.
5249
5250        if (mMovement != null && mLayout != null) {
5251            boolean doDown = true;
5252            if (otherEvent != null) {
5253                try {
5254                    boolean handled = mMovement.onKeyOther(this, (Spannable) mText,
5255                            otherEvent);
5256                    doDown = false;
5257                    if (handled) {
5258                        return -1;
5259                    }
5260                } catch (AbstractMethodError e) {
5261                    // onKeyOther was added after 1.0, so if it isn't
5262                    // implemented we need to try to dispatch as a regular down.
5263                }
5264            }
5265            if (doDown) {
5266                if (mMovement.onKeyDown(this, (Spannable)mText, keyCode, event))
5267                    return 2;
5268            }
5269        }
5270
5271        return 0;
5272    }
5273
5274    /**
5275     * Resets the mErrorWasChanged flag, so that future calls to {@link #setError(CharSequence)}
5276     * can be recorded.
5277     * @hide
5278     */
5279    public void resetErrorChangedFlag() {
5280        /*
5281         * Keep track of what the error was before doing the input
5282         * so that if an input filter changed the error, we leave
5283         * that error showing.  Otherwise, we take down whatever
5284         * error was showing when the user types something.
5285         */
5286        mErrorWasChanged = false;
5287    }
5288
5289    /**
5290     * @hide
5291     */
5292    public void hideErrorIfUnchanged() {
5293        if (mError != null && !mErrorWasChanged) {
5294            setError(null, null);
5295        }
5296    }
5297
5298    @Override
5299    public boolean onKeyUp(int keyCode, KeyEvent event) {
5300        if (!isEnabled()) {
5301            return super.onKeyUp(keyCode, event);
5302        }
5303
5304        switch (keyCode) {
5305            case KeyEvent.KEYCODE_DPAD_CENTER:
5306                mDPadCenterIsDown = false;
5307                if (event.hasNoModifiers()) {
5308                    /*
5309                     * If there is a click listener, just call through to
5310                     * super, which will invoke it.
5311                     *
5312                     * If there isn't a click listener, try to show the soft
5313                     * input method.  (It will also
5314                     * call performClick(), but that won't do anything in
5315                     * this case.)
5316                     */
5317                    if (mOnClickListener == null) {
5318                        if (mMovement != null && mText instanceof Editable
5319                                && mLayout != null && onCheckIsTextEditor()) {
5320                            InputMethodManager imm = InputMethodManager.peekInstance();
5321                            if (imm != null) {
5322                                imm.viewClicked(this);
5323                                imm.showSoftInput(this, 0);
5324                            }
5325                        }
5326                    }
5327                }
5328                return super.onKeyUp(keyCode, event);
5329
5330            case KeyEvent.KEYCODE_ENTER:
5331                mEnterKeyIsDown = false;
5332                if (event.hasNoModifiers()) {
5333                    if (mInputContentType != null
5334                            && mInputContentType.onEditorActionListener != null
5335                            && mInputContentType.enterDown) {
5336                        mInputContentType.enterDown = false;
5337                        if (mInputContentType.onEditorActionListener.onEditorAction(
5338                                this, EditorInfo.IME_NULL, event)) {
5339                            return true;
5340                        }
5341                    }
5342
5343                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
5344                            || shouldAdvanceFocusOnEnter()) {
5345                        /*
5346                         * If there is a click listener, just call through to
5347                         * super, which will invoke it.
5348                         *
5349                         * If there isn't a click listener, try to advance focus,
5350                         * but still call through to super, which will reset the
5351                         * pressed state and longpress state.  (It will also
5352                         * call performClick(), but that won't do anything in
5353                         * this case.)
5354                         */
5355                        if (mOnClickListener == null) {
5356                            View v = focusSearch(FOCUS_DOWN);
5357
5358                            if (v != null) {
5359                                if (!v.requestFocus(FOCUS_DOWN)) {
5360                                    throw new IllegalStateException(
5361                                            "focus search returned a view " +
5362                                            "that wasn't able to take focus!");
5363                                }
5364
5365                                /*
5366                                 * Return true because we handled the key; super
5367                                 * will return false because there was no click
5368                                 * listener.
5369                                 */
5370                                super.onKeyUp(keyCode, event);
5371                                return true;
5372                            } else if ((event.getFlags()
5373                                    & KeyEvent.FLAG_EDITOR_ACTION) != 0) {
5374                                // No target for next focus, but make sure the IME
5375                                // if this came from it.
5376                                InputMethodManager imm = InputMethodManager.peekInstance();
5377                                if (imm != null && imm.isActive(this)) {
5378                                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
5379                                }
5380                            }
5381                        }
5382                    }
5383                    return super.onKeyUp(keyCode, event);
5384                }
5385                break;
5386        }
5387
5388        if (mInput != null)
5389            if (mInput.onKeyUp(this, (Editable) mText, keyCode, event))
5390                return true;
5391
5392        if (mMovement != null && mLayout != null)
5393            if (mMovement.onKeyUp(this, (Spannable) mText, keyCode, event))
5394                return true;
5395
5396        return super.onKeyUp(keyCode, event);
5397    }
5398
5399    @Override public boolean onCheckIsTextEditor() {
5400        return mInputType != EditorInfo.TYPE_NULL;
5401    }
5402
5403    @Override public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
5404        if (onCheckIsTextEditor() && isEnabled()) {
5405            if (mInputMethodState == null) {
5406                mInputMethodState = new InputMethodState();
5407            }
5408            outAttrs.inputType = mInputType;
5409            if (mInputContentType != null) {
5410                outAttrs.imeOptions = mInputContentType.imeOptions;
5411                outAttrs.privateImeOptions = mInputContentType.privateImeOptions;
5412                outAttrs.actionLabel = mInputContentType.imeActionLabel;
5413                outAttrs.actionId = mInputContentType.imeActionId;
5414                outAttrs.extras = mInputContentType.extras;
5415            } else {
5416                outAttrs.imeOptions = EditorInfo.IME_NULL;
5417            }
5418            if (focusSearch(FOCUS_DOWN) != null) {
5419                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_NEXT;
5420            }
5421            if (focusSearch(FOCUS_UP) != null) {
5422                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_PREVIOUS;
5423            }
5424            if ((outAttrs.imeOptions&EditorInfo.IME_MASK_ACTION)
5425                    == EditorInfo.IME_ACTION_UNSPECIFIED) {
5426                if ((outAttrs.imeOptions&EditorInfo.IME_FLAG_NAVIGATE_NEXT) != 0) {
5427                    // An action has not been set, but the enter key will move to
5428                    // the next focus, so set the action to that.
5429                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_NEXT;
5430                } else {
5431                    // An action has not been set, and there is no focus to move
5432                    // to, so let's just supply a "done" action.
5433                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_DONE;
5434                }
5435                if (!shouldAdvanceFocusOnEnter()) {
5436                    outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5437                }
5438            }
5439            if (isMultilineInputType(outAttrs.inputType)) {
5440                // Multi-line text editors should always show an enter key.
5441                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
5442            }
5443            outAttrs.hintText = mHint;
5444            if (mText instanceof Editable) {
5445                InputConnection ic = new EditableInputConnection(this);
5446                outAttrs.initialSelStart = getSelectionStart();
5447                outAttrs.initialSelEnd = getSelectionEnd();
5448                outAttrs.initialCapsMode = ic.getCursorCapsMode(mInputType);
5449                return ic;
5450            }
5451        }
5452        return null;
5453    }
5454
5455    /**
5456     * If this TextView contains editable content, extract a portion of it
5457     * based on the information in <var>request</var> in to <var>outText</var>.
5458     * @return Returns true if the text was successfully extracted, else false.
5459     */
5460    public boolean extractText(ExtractedTextRequest request,
5461            ExtractedText outText) {
5462        return extractTextInternal(request, EXTRACT_UNKNOWN, EXTRACT_UNKNOWN,
5463                EXTRACT_UNKNOWN, outText);
5464    }
5465
5466    static final int EXTRACT_NOTHING = -2;
5467    static final int EXTRACT_UNKNOWN = -1;
5468
5469    boolean extractTextInternal(ExtractedTextRequest request,
5470            int partialStartOffset, int partialEndOffset, int delta,
5471            ExtractedText outText) {
5472        final CharSequence content = mText;
5473        if (content != null) {
5474            if (partialStartOffset != EXTRACT_NOTHING) {
5475                final int N = content.length();
5476                if (partialStartOffset < 0) {
5477                    outText.partialStartOffset = outText.partialEndOffset = -1;
5478                    partialStartOffset = 0;
5479                    partialEndOffset = N;
5480                } else {
5481                    // Now use the delta to determine the actual amount of text
5482                    // we need.
5483                    partialEndOffset += delta;
5484                    // Adjust offsets to ensure we contain full spans.
5485                    if (content instanceof Spanned) {
5486                        Spanned spanned = (Spanned)content;
5487                        Object[] spans = spanned.getSpans(partialStartOffset,
5488                                partialEndOffset, ParcelableSpan.class);
5489                        int i = spans.length;
5490                        while (i > 0) {
5491                            i--;
5492                            int j = spanned.getSpanStart(spans[i]);
5493                            if (j < partialStartOffset) partialStartOffset = j;
5494                            j = spanned.getSpanEnd(spans[i]);
5495                            if (j > partialEndOffset) partialEndOffset = j;
5496                        }
5497                    }
5498                    outText.partialStartOffset = partialStartOffset;
5499                    outText.partialEndOffset = partialEndOffset - delta;
5500
5501                    if (partialStartOffset > N) {
5502                        partialStartOffset = N;
5503                    } else if (partialStartOffset < 0) {
5504                        partialStartOffset = 0;
5505                    }
5506                    if (partialEndOffset > N) {
5507                        partialEndOffset = N;
5508                    } else if (partialEndOffset < 0) {
5509                        partialEndOffset = 0;
5510                    }
5511                }
5512                if ((request.flags&InputConnection.GET_TEXT_WITH_STYLES) != 0) {
5513                    outText.text = content.subSequence(partialStartOffset,
5514                            partialEndOffset);
5515                } else {
5516                    outText.text = TextUtils.substring(content, partialStartOffset,
5517                            partialEndOffset);
5518                }
5519            } else {
5520                outText.partialStartOffset = 0;
5521                outText.partialEndOffset = 0;
5522                outText.text = "";
5523            }
5524            outText.flags = 0;
5525            if (MetaKeyKeyListener.getMetaState(mText, MetaKeyKeyListener.META_SELECTING) != 0) {
5526                outText.flags |= ExtractedText.FLAG_SELECTING;
5527            }
5528            if (mSingleLine) {
5529                outText.flags |= ExtractedText.FLAG_SINGLE_LINE;
5530            }
5531            outText.startOffset = 0;
5532            outText.selectionStart = getSelectionStart();
5533            outText.selectionEnd = getSelectionEnd();
5534            return true;
5535        }
5536        return false;
5537    }
5538
5539    boolean reportExtractedText() {
5540        final InputMethodState ims = mInputMethodState;
5541        if (ims != null) {
5542            final boolean contentChanged = ims.mContentChanged;
5543            if (contentChanged || ims.mSelectionModeChanged) {
5544                ims.mContentChanged = false;
5545                ims.mSelectionModeChanged = false;
5546                final ExtractedTextRequest req = mInputMethodState.mExtracting;
5547                if (req != null) {
5548                    InputMethodManager imm = InputMethodManager.peekInstance();
5549                    if (imm != null) {
5550                        if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Retrieving extracted start="
5551                                + ims.mChangedStart + " end=" + ims.mChangedEnd
5552                                + " delta=" + ims.mChangedDelta);
5553                        if (ims.mChangedStart < 0 && !contentChanged) {
5554                            ims.mChangedStart = EXTRACT_NOTHING;
5555                        }
5556                        if (extractTextInternal(req, ims.mChangedStart, ims.mChangedEnd,
5557                                ims.mChangedDelta, ims.mTmpExtracted)) {
5558                            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Reporting extracted start="
5559                                    + ims.mTmpExtracted.partialStartOffset
5560                                    + " end=" + ims.mTmpExtracted.partialEndOffset
5561                                    + ": " + ims.mTmpExtracted.text);
5562                            imm.updateExtractedText(this, req.token,
5563                                    mInputMethodState.mTmpExtracted);
5564                            ims.mChangedStart = EXTRACT_UNKNOWN;
5565                            ims.mChangedEnd = EXTRACT_UNKNOWN;
5566                            ims.mChangedDelta = 0;
5567                            ims.mContentChanged = false;
5568                            return true;
5569                        }
5570                    }
5571                }
5572            }
5573        }
5574        return false;
5575    }
5576
5577    /**
5578     * This is used to remove all style-impacting spans from text before new
5579     * extracted text is being replaced into it, so that we don't have any
5580     * lingering spans applied during the replace.
5581     */
5582    static void removeParcelableSpans(Spannable spannable, int start, int end) {
5583        Object[] spans = spannable.getSpans(start, end, ParcelableSpan.class);
5584        int i = spans.length;
5585        while (i > 0) {
5586            i--;
5587            spannable.removeSpan(spans[i]);
5588        }
5589    }
5590
5591    /**
5592     * Apply to this text view the given extracted text, as previously
5593     * returned by {@link #extractText(ExtractedTextRequest, ExtractedText)}.
5594     */
5595    public void setExtractedText(ExtractedText text) {
5596        Editable content = getEditableText();
5597        if (text.text != null) {
5598            if (content == null) {
5599                setText(text.text, TextView.BufferType.EDITABLE);
5600            } else if (text.partialStartOffset < 0) {
5601                removeParcelableSpans(content, 0, content.length());
5602                content.replace(0, content.length(), text.text);
5603            } else {
5604                final int N = content.length();
5605                int start = text.partialStartOffset;
5606                if (start > N) start = N;
5607                int end = text.partialEndOffset;
5608                if (end > N) end = N;
5609                removeParcelableSpans(content, start, end);
5610                content.replace(start, end, text.text);
5611            }
5612        }
5613
5614        // Now set the selection position...  make sure it is in range, to
5615        // avoid crashes.  If this is a partial update, it is possible that
5616        // the underlying text may have changed, causing us problems here.
5617        // Also we just don't want to trust clients to do the right thing.
5618        Spannable sp = (Spannable)getText();
5619        final int N = sp.length();
5620        int start = text.selectionStart;
5621        if (start < 0) start = 0;
5622        else if (start > N) start = N;
5623        int end = text.selectionEnd;
5624        if (end < 0) end = 0;
5625        else if (end > N) end = N;
5626        Selection.setSelection(sp, start, end);
5627
5628        // Finally, update the selection mode.
5629        if ((text.flags&ExtractedText.FLAG_SELECTING) != 0) {
5630            MetaKeyKeyListener.startSelecting(this, sp);
5631        } else {
5632            MetaKeyKeyListener.stopSelecting(this, sp);
5633        }
5634    }
5635
5636    /**
5637     * @hide
5638     */
5639    public void setExtracting(ExtractedTextRequest req) {
5640        if (mInputMethodState != null) {
5641            mInputMethodState.mExtracting = req;
5642        }
5643        // This stops a possible text selection mode. Maybe not intended.
5644        hideControllers();
5645    }
5646
5647    /**
5648     * Called by the framework in response to a text completion from
5649     * the current input method, provided by it calling
5650     * {@link InputConnection#commitCompletion
5651     * InputConnection.commitCompletion()}.  The default implementation does
5652     * nothing; text views that are supporting auto-completion should override
5653     * this to do their desired behavior.
5654     *
5655     * @param text The auto complete text the user has selected.
5656     */
5657    public void onCommitCompletion(CompletionInfo text) {
5658        // intentionally empty
5659    }
5660
5661    /**
5662     * Called by the framework in response to a text auto-correction (such as fixing a typo using a
5663     * a dictionnary) from the current input method, provided by it calling
5664     * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default
5665     * implementation flashes the background of the corrected word to provide feedback to the user.
5666     *
5667     * @param info The auto correct info about the text that was corrected.
5668     */
5669    public void onCommitCorrection(CorrectionInfo info) {
5670        if (mCorrectionHighlighter == null) {
5671            mCorrectionHighlighter = new CorrectionHighlighter();
5672        } else {
5673            mCorrectionHighlighter.invalidate(false);
5674        }
5675
5676        mCorrectionHighlighter.highlight(info);
5677    }
5678
5679    private class CorrectionHighlighter {
5680        private final Path mPath = new Path();
5681        private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
5682        private int mStart, mEnd;
5683        private long mFadingStartTime;
5684        private final static int FADE_OUT_DURATION = 400;
5685
5686        public CorrectionHighlighter() {
5687            mPaint.setCompatibilityScaling(getResources().getCompatibilityInfo().applicationScale);
5688            mPaint.setStyle(Paint.Style.FILL);
5689        }
5690
5691        public void highlight(CorrectionInfo info) {
5692            mStart = info.getOffset();
5693            mEnd = mStart + info.getNewText().length();
5694            mFadingStartTime = SystemClock.uptimeMillis();
5695
5696            if (mStart < 0 || mEnd < 0) {
5697                stopAnimation();
5698            }
5699        }
5700
5701        public void draw(Canvas canvas, int cursorOffsetVertical) {
5702            if (updatePath() && updatePaint()) {
5703                if (cursorOffsetVertical != 0) {
5704                    canvas.translate(0, cursorOffsetVertical);
5705                }
5706
5707                canvas.drawPath(mPath, mPaint);
5708
5709                if (cursorOffsetVertical != 0) {
5710                    canvas.translate(0, -cursorOffsetVertical);
5711                }
5712                invalidate(true);
5713            } else {
5714                stopAnimation();
5715                invalidate(false);
5716            }
5717        }
5718
5719        private boolean updatePaint() {
5720            final long duration = SystemClock.uptimeMillis() - mFadingStartTime;
5721            if (duration > FADE_OUT_DURATION) return false;
5722
5723            final float coef = 1.0f - (float) duration / FADE_OUT_DURATION;
5724            final int highlightColorAlpha = Color.alpha(mHighlightColor);
5725            final int color = (mHighlightColor & 0x00FFFFFF) +
5726                    ((int) (highlightColorAlpha * coef) << 24);
5727            mPaint.setColor(color);
5728            return true;
5729        }
5730
5731        private boolean updatePath() {
5732            final Layout layout = TextView.this.mLayout;
5733            if (layout == null) return false;
5734
5735            // Update in case text is edited while the animation is run
5736            final int length = mText.length();
5737            int start = Math.min(length, mStart);
5738            int end = Math.min(length, mEnd);
5739
5740            mPath.reset();
5741            TextView.this.mLayout.getSelectionPath(start, end, mPath);
5742            return true;
5743        }
5744
5745        private void invalidate(boolean delayed) {
5746            if (TextView.this.mLayout == null) return;
5747
5748            synchronized (sTempRect) {
5749                mPath.computeBounds(sTempRect, false);
5750
5751                int left = getCompoundPaddingLeft();
5752                int top = getExtendedPaddingTop() + getVerticalOffset(true);
5753
5754                if (delayed) {
5755                    TextView.this.postInvalidateDelayed(16, // 60 Hz update
5756                            left + (int) sTempRect.left, top + (int) sTempRect.top,
5757                            left + (int) sTempRect.right, top + (int) sTempRect.bottom);
5758                } else {
5759                    TextView.this.postInvalidate((int) sTempRect.left, (int) sTempRect.top,
5760                            (int) sTempRect.right, (int) sTempRect.bottom);
5761                }
5762            }
5763        }
5764
5765        private void stopAnimation() {
5766            TextView.this.mCorrectionHighlighter = null;
5767        }
5768    }
5769
5770    public void beginBatchEdit() {
5771        mInBatchEditControllers = true;
5772        final InputMethodState ims = mInputMethodState;
5773        if (ims != null) {
5774            int nesting = ++ims.mBatchEditNesting;
5775            if (nesting == 1) {
5776                ims.mCursorChanged = false;
5777                ims.mChangedDelta = 0;
5778                if (ims.mContentChanged) {
5779                    // We already have a pending change from somewhere else,
5780                    // so turn this into a full update.
5781                    ims.mChangedStart = 0;
5782                    ims.mChangedEnd = mText.length();
5783                } else {
5784                    ims.mChangedStart = EXTRACT_UNKNOWN;
5785                    ims.mChangedEnd = EXTRACT_UNKNOWN;
5786                    ims.mContentChanged = false;
5787                }
5788                onBeginBatchEdit();
5789            }
5790        }
5791    }
5792
5793    public void endBatchEdit() {
5794        mInBatchEditControllers = false;
5795        final InputMethodState ims = mInputMethodState;
5796        if (ims != null) {
5797            int nesting = --ims.mBatchEditNesting;
5798            if (nesting == 0) {
5799                finishBatchEdit(ims);
5800            }
5801        }
5802    }
5803
5804    void ensureEndedBatchEdit() {
5805        final InputMethodState ims = mInputMethodState;
5806        if (ims != null && ims.mBatchEditNesting != 0) {
5807            ims.mBatchEditNesting = 0;
5808            finishBatchEdit(ims);
5809        }
5810    }
5811
5812    void finishBatchEdit(final InputMethodState ims) {
5813        onEndBatchEdit();
5814
5815        if (ims.mContentChanged || ims.mSelectionModeChanged) {
5816            updateAfterEdit();
5817            reportExtractedText();
5818        } else if (ims.mCursorChanged) {
5819            // Cheezy way to get us to report the current cursor location.
5820            invalidateCursor();
5821        }
5822    }
5823
5824    void updateAfterEdit() {
5825        invalidate();
5826        int curs = getSelectionStart();
5827
5828        if (curs >= 0 || (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
5829            registerForPreDraw();
5830        }
5831
5832        if (curs >= 0) {
5833            mHighlightPathBogus = true;
5834            makeBlink();
5835        }
5836
5837        checkForResize();
5838    }
5839
5840    /**
5841     * Called by the framework in response to a request to begin a batch
5842     * of edit operations through a call to link {@link #beginBatchEdit()}.
5843     */
5844    public void onBeginBatchEdit() {
5845        // intentionally empty
5846    }
5847
5848    /**
5849     * Called by the framework in response to a request to end a batch
5850     * of edit operations through a call to link {@link #endBatchEdit}.
5851     */
5852    public void onEndBatchEdit() {
5853        // intentionally empty
5854    }
5855
5856    /**
5857     * Called by the framework in response to a private command from the
5858     * current method, provided by it calling
5859     * {@link InputConnection#performPrivateCommand
5860     * InputConnection.performPrivateCommand()}.
5861     *
5862     * @param action The action name of the command.
5863     * @param data Any additional data for the command.  This may be null.
5864     * @return Return true if you handled the command, else false.
5865     */
5866    public boolean onPrivateIMECommand(String action, Bundle data) {
5867        return false;
5868    }
5869
5870    private void nullLayouts() {
5871        if (mLayout instanceof BoringLayout && mSavedLayout == null) {
5872            mSavedLayout = (BoringLayout) mLayout;
5873        }
5874        if (mHintLayout instanceof BoringLayout && mSavedHintLayout == null) {
5875            mSavedHintLayout = (BoringLayout) mHintLayout;
5876        }
5877
5878        mLayout = mHintLayout = null;
5879
5880        // Since it depends on the value of mLayout
5881        prepareCursorControllers();
5882    }
5883
5884    /**
5885     * Make a new Layout based on the already-measured size of the view,
5886     * on the assumption that it was measured correctly at some point.
5887     */
5888    private void assumeLayout() {
5889        int width = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
5890
5891        if (width < 1) {
5892            width = 0;
5893        }
5894
5895        int physicalWidth = width;
5896
5897        if (mHorizontallyScrolling) {
5898            width = VERY_WIDE;
5899        }
5900
5901        makeNewLayout(width, physicalWidth, UNKNOWN_BORING, UNKNOWN_BORING,
5902                      physicalWidth, false);
5903    }
5904
5905    @Override
5906    protected void resetResolvedLayoutDirection() {
5907        super.resetResolvedLayoutDirection();
5908
5909        if (mLayoutAlignment != null &&
5910                (mTextAlign == TextAlign.VIEW_START ||
5911                mTextAlign == TextAlign.VIEW_END)) {
5912            mLayoutAlignment = null;
5913        }
5914    }
5915
5916    private Layout.Alignment getLayoutAlignment() {
5917        if (mLayoutAlignment == null) {
5918            Layout.Alignment alignment;
5919            TextAlign textAlign = mTextAlign;
5920            switch (textAlign) {
5921                case INHERIT:
5922                    // fall through to gravity temporarily
5923                    // intention is to inherit value through view hierarchy.
5924                case GRAVITY:
5925                    switch (mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) {
5926                        case Gravity.START:
5927                            alignment = Layout.Alignment.ALIGN_NORMAL;
5928                            break;
5929                        case Gravity.END:
5930                            alignment = Layout.Alignment.ALIGN_OPPOSITE;
5931                            break;
5932                        case Gravity.LEFT:
5933                            alignment = Layout.Alignment.ALIGN_LEFT;
5934                            break;
5935                        case Gravity.RIGHT:
5936                            alignment = Layout.Alignment.ALIGN_RIGHT;
5937                            break;
5938                        case Gravity.CENTER_HORIZONTAL:
5939                            alignment = Layout.Alignment.ALIGN_CENTER;
5940                            break;
5941                        default:
5942                            alignment = Layout.Alignment.ALIGN_NORMAL;
5943                            break;
5944                    }
5945                    break;
5946                case TEXT_START:
5947                    alignment = Layout.Alignment.ALIGN_NORMAL;
5948                    break;
5949                case TEXT_END:
5950                    alignment = Layout.Alignment.ALIGN_OPPOSITE;
5951                    break;
5952                case CENTER:
5953                    alignment = Layout.Alignment.ALIGN_CENTER;
5954                    break;
5955                case VIEW_START:
5956                    alignment = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
5957                            Layout.Alignment.ALIGN_RIGHT : Layout.Alignment.ALIGN_LEFT;
5958                    break;
5959                case VIEW_END:
5960                    alignment = (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
5961                            Layout.Alignment.ALIGN_LEFT : Layout.Alignment.ALIGN_RIGHT;
5962                    break;
5963                default:
5964                    alignment = Layout.Alignment.ALIGN_NORMAL;
5965                    break;
5966            }
5967            mLayoutAlignment = alignment;
5968        }
5969        return mLayoutAlignment;
5970    }
5971
5972    /**
5973     * The width passed in is now the desired layout width,
5974     * not the full view width with padding.
5975     * {@hide}
5976     */
5977    protected void makeNewLayout(int w, int hintWidth,
5978                                 BoringLayout.Metrics boring,
5979                                 BoringLayout.Metrics hintBoring,
5980                                 int ellipsisWidth, boolean bringIntoView) {
5981        stopMarquee();
5982
5983        mHighlightPathBogus = true;
5984
5985        if (w < 0) {
5986            w = 0;
5987        }
5988        if (hintWidth < 0) {
5989            hintWidth = 0;
5990        }
5991
5992        Layout.Alignment alignment = getLayoutAlignment();
5993        boolean shouldEllipsize = mEllipsize != null && mInput == null;
5994
5995        if (mText instanceof Spannable) {
5996            mLayout = new DynamicLayout(mText, mTransformed, mTextPaint, w,
5997                    alignment, mSpacingMult,
5998                    mSpacingAdd, mIncludePad, mInput == null ? mEllipsize : null,
5999                    ellipsisWidth);
6000        } else {
6001            if (boring == UNKNOWN_BORING) {
6002                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mBoring);
6003                if (boring != null) {
6004                    mBoring = boring;
6005                }
6006            }
6007
6008            if (boring != null) {
6009                if (boring.width <= w &&
6010                    (mEllipsize == null || boring.width <= ellipsisWidth)) {
6011                    if (mSavedLayout != null) {
6012                        mLayout = mSavedLayout.
6013                                replaceOrMake(mTransformed, mTextPaint,
6014                                w, alignment, mSpacingMult, mSpacingAdd,
6015                                boring, mIncludePad);
6016                    } else {
6017                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
6018                                w, alignment, mSpacingMult, mSpacingAdd,
6019                                boring, mIncludePad);
6020                    }
6021
6022                    mSavedLayout = (BoringLayout) mLayout;
6023                } else if (shouldEllipsize && boring.width <= w) {
6024                    if (mSavedLayout != null) {
6025                        mLayout = mSavedLayout.
6026                                replaceOrMake(mTransformed, mTextPaint,
6027                                w, alignment, mSpacingMult, mSpacingAdd,
6028                                boring, mIncludePad, mEllipsize,
6029                                ellipsisWidth);
6030                    } else {
6031                        mLayout = BoringLayout.make(mTransformed, mTextPaint,
6032                                w, alignment, mSpacingMult, mSpacingAdd,
6033                                boring, mIncludePad, mEllipsize,
6034                                ellipsisWidth);
6035                    }
6036                } else if (shouldEllipsize) {
6037                    mLayout = new StaticLayout(mTransformed,
6038                                0, mTransformed.length(),
6039                                mTextPaint, w, alignment, mSpacingMult,
6040                                mSpacingAdd, mIncludePad, mEllipsize,
6041                                ellipsisWidth);
6042                } else {
6043                    mLayout = new StaticLayout(mTransformed, mTextPaint,
6044                            w, alignment, mSpacingMult, mSpacingAdd,
6045                            mIncludePad);
6046                }
6047            } else if (shouldEllipsize) {
6048                mLayout = new StaticLayout(mTransformed,
6049                            0, mTransformed.length(),
6050                            mTextPaint, w, alignment, mSpacingMult,
6051                            mSpacingAdd, mIncludePad, mEllipsize,
6052                            ellipsisWidth);
6053            } else {
6054                mLayout = new StaticLayout(mTransformed, mTextPaint,
6055                        w, alignment, mSpacingMult, mSpacingAdd,
6056                        mIncludePad);
6057            }
6058        }
6059
6060        shouldEllipsize = mEllipsize != null;
6061        mHintLayout = null;
6062
6063        if (mHint != null) {
6064            if (shouldEllipsize) hintWidth = w;
6065
6066            if (hintBoring == UNKNOWN_BORING) {
6067                hintBoring = BoringLayout.isBoring(mHint, mTextPaint,
6068                                                   mHintBoring);
6069                if (hintBoring != null) {
6070                    mHintBoring = hintBoring;
6071                }
6072            }
6073
6074            if (hintBoring != null) {
6075                if (hintBoring.width <= hintWidth &&
6076                    (!shouldEllipsize || hintBoring.width <= ellipsisWidth)) {
6077                    if (mSavedHintLayout != null) {
6078                        mHintLayout = mSavedHintLayout.
6079                                replaceOrMake(mHint, mTextPaint,
6080                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6081                                hintBoring, mIncludePad);
6082                    } else {
6083                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6084                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6085                                hintBoring, mIncludePad);
6086                    }
6087
6088                    mSavedHintLayout = (BoringLayout) mHintLayout;
6089                } else if (shouldEllipsize && hintBoring.width <= hintWidth) {
6090                    if (mSavedHintLayout != null) {
6091                        mHintLayout = mSavedHintLayout.
6092                                replaceOrMake(mHint, mTextPaint,
6093                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6094                                hintBoring, mIncludePad, mEllipsize,
6095                                ellipsisWidth);
6096                    } else {
6097                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6098                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6099                                hintBoring, mIncludePad, mEllipsize,
6100                                ellipsisWidth);
6101                    }
6102                } else if (shouldEllipsize) {
6103                    mHintLayout = new StaticLayout(mHint,
6104                                0, mHint.length(),
6105                                mTextPaint, hintWidth, alignment, mSpacingMult,
6106                                mSpacingAdd, mIncludePad, mEllipsize,
6107                                ellipsisWidth);
6108                } else {
6109                    mHintLayout = new StaticLayout(mHint, mTextPaint,
6110                            hintWidth, alignment, mSpacingMult, mSpacingAdd,
6111                            mIncludePad);
6112                }
6113            } else if (shouldEllipsize) {
6114                mHintLayout = new StaticLayout(mHint,
6115                            0, mHint.length(),
6116                            mTextPaint, hintWidth, alignment, mSpacingMult,
6117                            mSpacingAdd, mIncludePad, mEllipsize,
6118                            ellipsisWidth);
6119            } else {
6120                mHintLayout = new StaticLayout(mHint, mTextPaint,
6121                        hintWidth, alignment, mSpacingMult, mSpacingAdd,
6122                        mIncludePad);
6123            }
6124        }
6125
6126        if (bringIntoView) {
6127            registerForPreDraw();
6128        }
6129
6130        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6131            if (!compressText(ellipsisWidth)) {
6132                final int height = mLayoutParams.height;
6133                // If the size of the view does not depend on the size of the text, try to
6134                // start the marquee immediately
6135                if (height != LayoutParams.WRAP_CONTENT && height != LayoutParams.MATCH_PARENT) {
6136                    startMarquee();
6137                } else {
6138                    // Defer the start of the marquee until we know our width (see setFrame())
6139                    mRestartMarquee = true;
6140                }
6141            }
6142        }
6143
6144        // CursorControllers need a non-null mLayout
6145        prepareCursorControllers();
6146    }
6147
6148    private boolean compressText(float width) {
6149        if (isHardwareAccelerated()) return false;
6150
6151        // Only compress the text if it hasn't been compressed by the previous pass
6152        if (width > 0.0f && mLayout != null && getLineCount() == 1 && !mUserSetTextScaleX &&
6153                mTextPaint.getTextScaleX() == 1.0f) {
6154            final float textWidth = mLayout.getLineWidth(0);
6155            final float overflow = (textWidth + 1.0f - width) / width;
6156            if (overflow > 0.0f && overflow <= Marquee.MARQUEE_DELTA_MAX) {
6157                mTextPaint.setTextScaleX(1.0f - overflow - 0.005f);
6158                post(new Runnable() {
6159                    public void run() {
6160                        requestLayout();
6161                    }
6162                });
6163                return true;
6164            }
6165        }
6166
6167        return false;
6168    }
6169
6170    private static int desired(Layout layout) {
6171        int n = layout.getLineCount();
6172        CharSequence text = layout.getText();
6173        float max = 0;
6174
6175        // if any line was wrapped, we can't use it.
6176        // but it's ok for the last line not to have a newline
6177
6178        for (int i = 0; i < n - 1; i++) {
6179            if (text.charAt(layout.getLineEnd(i) - 1) != '\n')
6180                return -1;
6181        }
6182
6183        for (int i = 0; i < n; i++) {
6184            max = Math.max(max, layout.getLineWidth(i));
6185        }
6186
6187        return (int) FloatMath.ceil(max);
6188    }
6189
6190    /**
6191     * Set whether the TextView includes extra top and bottom padding to make
6192     * room for accents that go above the normal ascent and descent.
6193     * The default is true.
6194     *
6195     * @attr ref android.R.styleable#TextView_includeFontPadding
6196     */
6197    public void setIncludeFontPadding(boolean includepad) {
6198        mIncludePad = includepad;
6199
6200        if (mLayout != null) {
6201            nullLayouts();
6202            requestLayout();
6203            invalidate();
6204        }
6205    }
6206
6207    private static final BoringLayout.Metrics UNKNOWN_BORING = new BoringLayout.Metrics();
6208
6209    @Override
6210    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
6211        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
6212        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
6213        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
6214        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
6215
6216        int width;
6217        int height;
6218
6219        BoringLayout.Metrics boring = UNKNOWN_BORING;
6220        BoringLayout.Metrics hintBoring = UNKNOWN_BORING;
6221
6222        int des = -1;
6223        boolean fromexisting = false;
6224
6225        if (widthMode == MeasureSpec.EXACTLY) {
6226            // Parent has told us how big to be. So be it.
6227            width = widthSize;
6228        } else {
6229            if (mLayout != null && mEllipsize == null) {
6230                des = desired(mLayout);
6231            }
6232
6233            if (des < 0) {
6234                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mBoring);
6235                if (boring != null) {
6236                    mBoring = boring;
6237                }
6238            } else {
6239                fromexisting = true;
6240            }
6241
6242            if (boring == null || boring == UNKNOWN_BORING) {
6243                if (des < 0) {
6244                    des = (int) FloatMath.ceil(Layout.getDesiredWidth(mTransformed, mTextPaint));
6245                }
6246
6247                width = des;
6248            } else {
6249                width = boring.width;
6250            }
6251
6252            final Drawables dr = mDrawables;
6253            if (dr != null) {
6254                width = Math.max(width, dr.mDrawableWidthTop);
6255                width = Math.max(width, dr.mDrawableWidthBottom);
6256            }
6257
6258            if (mHint != null) {
6259                int hintDes = -1;
6260                int hintWidth;
6261
6262                if (mHintLayout != null && mEllipsize == null) {
6263                    hintDes = desired(mHintLayout);
6264                }
6265
6266                if (hintDes < 0) {
6267                    hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mHintBoring);
6268                    if (hintBoring != null) {
6269                        mHintBoring = hintBoring;
6270                    }
6271                }
6272
6273                if (hintBoring == null || hintBoring == UNKNOWN_BORING) {
6274                    if (hintDes < 0) {
6275                        hintDes = (int) FloatMath.ceil(
6276                                Layout.getDesiredWidth(mHint, mTextPaint));
6277                    }
6278
6279                    hintWidth = hintDes;
6280                } else {
6281                    hintWidth = hintBoring.width;
6282                }
6283
6284                if (hintWidth > width) {
6285                    width = hintWidth;
6286                }
6287            }
6288
6289            width += getCompoundPaddingLeft() + getCompoundPaddingRight();
6290
6291            if (mMaxWidthMode == EMS) {
6292                width = Math.min(width, mMaxWidth * getLineHeight());
6293            } else {
6294                width = Math.min(width, mMaxWidth);
6295            }
6296
6297            if (mMinWidthMode == EMS) {
6298                width = Math.max(width, mMinWidth * getLineHeight());
6299            } else {
6300                width = Math.max(width, mMinWidth);
6301            }
6302
6303            // Check against our minimum width
6304            width = Math.max(width, getSuggestedMinimumWidth());
6305
6306            if (widthMode == MeasureSpec.AT_MOST) {
6307                width = Math.min(widthSize, width);
6308            }
6309        }
6310
6311        int want = width - getCompoundPaddingLeft() - getCompoundPaddingRight();
6312        int unpaddedWidth = want;
6313
6314        if (mHorizontallyScrolling) want = VERY_WIDE;
6315
6316        int hintWant = want;
6317        int hintWidth = mHintLayout == null ? hintWant : mHintLayout.getWidth();
6318
6319        if (mLayout == null) {
6320            makeNewLayout(want, hintWant, boring, hintBoring,
6321                          width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6322        } else if ((mLayout.getWidth() != want) || (hintWidth != hintWant) ||
6323                   (mLayout.getEllipsizedWidth() !=
6324                        width - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
6325            if (mHint == null && mEllipsize == null &&
6326                    want > mLayout.getWidth() &&
6327                    (mLayout instanceof BoringLayout ||
6328                            (fromexisting && des >= 0 && des <= want))) {
6329                mLayout.increaseWidthTo(want);
6330            } else {
6331                makeNewLayout(want, hintWant, boring, hintBoring,
6332                              width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6333            }
6334        } else {
6335            // Width has not changed.
6336        }
6337
6338        if (heightMode == MeasureSpec.EXACTLY) {
6339            // Parent has told us how big to be. So be it.
6340            height = heightSize;
6341            mDesiredHeightAtMeasure = -1;
6342        } else {
6343            int desired = getDesiredHeight();
6344
6345            height = desired;
6346            mDesiredHeightAtMeasure = desired;
6347
6348            if (heightMode == MeasureSpec.AT_MOST) {
6349                height = Math.min(desired, heightSize);
6350            }
6351        }
6352
6353        int unpaddedHeight = height - getCompoundPaddingTop() - getCompoundPaddingBottom();
6354        if (mMaxMode == LINES && mLayout.getLineCount() > mMaximum) {
6355            unpaddedHeight = Math.min(unpaddedHeight, mLayout.getLineTop(mMaximum));
6356        }
6357
6358        /*
6359         * We didn't let makeNewLayout() register to bring the cursor into view,
6360         * so do it here if there is any possibility that it is needed.
6361         */
6362        if (mMovement != null ||
6363            mLayout.getWidth() > unpaddedWidth ||
6364            mLayout.getHeight() > unpaddedHeight) {
6365            registerForPreDraw();
6366        } else {
6367            scrollTo(0, 0);
6368        }
6369
6370        setMeasuredDimension(width, height);
6371    }
6372
6373    private int getDesiredHeight() {
6374        return Math.max(
6375                getDesiredHeight(mLayout, true),
6376                getDesiredHeight(mHintLayout, mEllipsize != null));
6377    }
6378
6379    private int getDesiredHeight(Layout layout, boolean cap) {
6380        if (layout == null) {
6381            return 0;
6382        }
6383
6384        int linecount = layout.getLineCount();
6385        int pad = getCompoundPaddingTop() + getCompoundPaddingBottom();
6386        int desired = layout.getLineTop(linecount);
6387
6388        final Drawables dr = mDrawables;
6389        if (dr != null) {
6390            desired = Math.max(desired, dr.mDrawableHeightLeft);
6391            desired = Math.max(desired, dr.mDrawableHeightRight);
6392        }
6393
6394        desired += pad;
6395        layout.setMaximumVisibleLineCount(0);
6396
6397        if (mMaxMode == LINES) {
6398            /*
6399             * Don't cap the hint to a certain number of lines.
6400             * (Do cap it, though, if we have a maximum pixel height.)
6401             */
6402            if (cap) {
6403                if (linecount > mMaximum) {
6404                    layout.setMaximumVisibleLineCount(mMaximum);
6405                    desired = layout.getLineTop(mMaximum);
6406
6407                    if (dr != null) {
6408                        desired = Math.max(desired, dr.mDrawableHeightLeft);
6409                        desired = Math.max(desired, dr.mDrawableHeightRight);
6410                    }
6411
6412                    desired += pad;
6413                    linecount = mMaximum;
6414                }
6415            }
6416        } else {
6417            desired = Math.min(desired, mMaximum);
6418        }
6419
6420        if (mMinMode == LINES) {
6421            if (linecount < mMinimum) {
6422                desired += getLineHeight() * (mMinimum - linecount);
6423            }
6424        } else {
6425            desired = Math.max(desired, mMinimum);
6426        }
6427
6428        // Check against our minimum height
6429        desired = Math.max(desired, getSuggestedMinimumHeight());
6430
6431        return desired;
6432    }
6433
6434    /**
6435     * Check whether a change to the existing text layout requires a
6436     * new view layout.
6437     */
6438    private void checkForResize() {
6439        boolean sizeChanged = false;
6440
6441        if (mLayout != null) {
6442            // Check if our width changed
6443            if (mLayoutParams.width == LayoutParams.WRAP_CONTENT) {
6444                sizeChanged = true;
6445                invalidate();
6446            }
6447
6448            // Check if our height changed
6449            if (mLayoutParams.height == LayoutParams.WRAP_CONTENT) {
6450                int desiredHeight = getDesiredHeight();
6451
6452                if (desiredHeight != this.getHeight()) {
6453                    sizeChanged = true;
6454                }
6455            } else if (mLayoutParams.height == LayoutParams.MATCH_PARENT) {
6456                if (mDesiredHeightAtMeasure >= 0) {
6457                    int desiredHeight = getDesiredHeight();
6458
6459                    if (desiredHeight != mDesiredHeightAtMeasure) {
6460                        sizeChanged = true;
6461                    }
6462                }
6463            }
6464        }
6465
6466        if (sizeChanged) {
6467            requestLayout();
6468            // caller will have already invalidated
6469        }
6470    }
6471
6472    /**
6473     * Check whether entirely new text requires a new view layout
6474     * or merely a new text layout.
6475     */
6476    private void checkForRelayout() {
6477        // If we have a fixed width, we can just swap in a new text layout
6478        // if the text height stays the same or if the view height is fixed.
6479
6480        if ((mLayoutParams.width != LayoutParams.WRAP_CONTENT ||
6481                (mMaxWidthMode == mMinWidthMode && mMaxWidth == mMinWidth)) &&
6482                (mHint == null || mHintLayout != null) &&
6483                (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight() > 0)) {
6484            // Static width, so try making a new text layout.
6485
6486            int oldht = mLayout.getHeight();
6487            int want = mLayout.getWidth();
6488            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
6489
6490            /*
6491             * No need to bring the text into view, since the size is not
6492             * changing (unless we do the requestLayout(), in which case it
6493             * will happen at measure).
6494             */
6495            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
6496                          mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight(),
6497                          false);
6498
6499            if (mEllipsize != TextUtils.TruncateAt.MARQUEE) {
6500                // In a fixed-height view, so use our new text layout.
6501                if (mLayoutParams.height != LayoutParams.WRAP_CONTENT &&
6502                    mLayoutParams.height != LayoutParams.MATCH_PARENT) {
6503                    invalidate();
6504                    return;
6505                }
6506
6507                // Dynamic height, but height has stayed the same,
6508                // so use our new text layout.
6509                if (mLayout.getHeight() == oldht &&
6510                    (mHintLayout == null || mHintLayout.getHeight() == oldht)) {
6511                    invalidate();
6512                    return;
6513                }
6514            }
6515
6516            // We lose: the height has changed and we have a dynamic height.
6517            // Request a new view layout using our new text layout.
6518            requestLayout();
6519            invalidate();
6520        } else {
6521            // Dynamic width, so we have no choice but to request a new
6522            // view layout with a new text layout.
6523
6524            nullLayouts();
6525            requestLayout();
6526            invalidate();
6527        }
6528    }
6529
6530    /**
6531     * Returns true if anything changed.
6532     */
6533    private boolean bringTextIntoView() {
6534        int line = 0;
6535        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6536            line = mLayout.getLineCount() - 1;
6537        }
6538
6539        Layout.Alignment a = mLayout.getParagraphAlignment(line);
6540        int dir = mLayout.getParagraphDirection(line);
6541        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6542        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6543        int ht = mLayout.getHeight();
6544
6545        int scrollx, scrolly;
6546
6547        // Convert to left, center, or right alignment.
6548        if (a == Layout.Alignment.ALIGN_NORMAL) {
6549            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_LEFT :
6550                Layout.Alignment.ALIGN_RIGHT;
6551        } else if (a == Layout.Alignment.ALIGN_OPPOSITE){
6552            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_RIGHT :
6553                Layout.Alignment.ALIGN_LEFT;
6554        }
6555
6556        if (a == Layout.Alignment.ALIGN_CENTER) {
6557            /*
6558             * Keep centered if possible, or, if it is too wide to fit,
6559             * keep leading edge in view.
6560             */
6561
6562            int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6563            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6564
6565            if (right - left < hspace) {
6566                scrollx = (right + left) / 2 - hspace / 2;
6567            } else {
6568                if (dir < 0) {
6569                    scrollx = right - hspace;
6570                } else {
6571                    scrollx = left;
6572                }
6573            }
6574        } else if (a == Layout.Alignment.ALIGN_RIGHT) {
6575            int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6576            scrollx = right - hspace;
6577        } else { // a == Layout.Alignment.ALIGN_LEFT (will also be the default)
6578            scrollx = (int) FloatMath.floor(mLayout.getLineLeft(line));
6579        }
6580
6581        if (ht < vspace) {
6582            scrolly = 0;
6583        } else {
6584            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
6585                scrolly = ht - vspace;
6586            } else {
6587                scrolly = 0;
6588            }
6589        }
6590
6591        if (scrollx != mScrollX || scrolly != mScrollY) {
6592            scrollTo(scrollx, scrolly);
6593            return true;
6594        } else {
6595            return false;
6596        }
6597    }
6598
6599    /**
6600     * Move the point, specified by the offset, into the view if it is needed.
6601     * This has to be called after layout. Returns true if anything changed.
6602     */
6603    public boolean bringPointIntoView(int offset) {
6604        boolean changed = false;
6605
6606        int line = mLayout.getLineForOffset(offset);
6607
6608        // FIXME: Is it okay to truncate this, or should we round?
6609        final int x = (int)mLayout.getPrimaryHorizontal(offset);
6610        final int top = mLayout.getLineTop(line);
6611        final int bottom = mLayout.getLineTop(line + 1);
6612
6613        int left = (int) FloatMath.floor(mLayout.getLineLeft(line));
6614        int right = (int) FloatMath.ceil(mLayout.getLineRight(line));
6615        int ht = mLayout.getHeight();
6616
6617        int grav;
6618
6619        switch (mLayout.getParagraphAlignment(line)) {
6620            case ALIGN_LEFT:
6621                grav = 1;
6622                break;
6623            case ALIGN_RIGHT:
6624                grav = -1;
6625                break;
6626            case ALIGN_NORMAL:
6627                grav = mLayout.getParagraphDirection(line);
6628                break;
6629            case ALIGN_OPPOSITE:
6630                grav = -mLayout.getParagraphDirection(line);
6631                break;
6632            case ALIGN_CENTER:
6633            default:
6634                grav = 0;
6635                break;
6636        }
6637
6638        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6639        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6640
6641        int hslack = (bottom - top) / 2;
6642        int vslack = hslack;
6643
6644        if (vslack > vspace / 4)
6645            vslack = vspace / 4;
6646        if (hslack > hspace / 4)
6647            hslack = hspace / 4;
6648
6649        int hs = mScrollX;
6650        int vs = mScrollY;
6651
6652        if (top - vs < vslack)
6653            vs = top - vslack;
6654        if (bottom - vs > vspace - vslack)
6655            vs = bottom - (vspace - vslack);
6656        if (ht - vs < vspace)
6657            vs = ht - vspace;
6658        if (0 - vs > 0)
6659            vs = 0;
6660
6661        if (grav != 0) {
6662            if (x - hs < hslack) {
6663                hs = x - hslack;
6664            }
6665            if (x - hs > hspace - hslack) {
6666                hs = x - (hspace - hslack);
6667            }
6668        }
6669
6670        if (grav < 0) {
6671            if (left - hs > 0)
6672                hs = left;
6673            if (right - hs < hspace)
6674                hs = right - hspace;
6675        } else if (grav > 0) {
6676            if (right - hs < hspace)
6677                hs = right - hspace;
6678            if (left - hs > 0)
6679                hs = left;
6680        } else /* grav == 0 */ {
6681            if (right - left <= hspace) {
6682                /*
6683                 * If the entire text fits, center it exactly.
6684                 */
6685                hs = left - (hspace - (right - left)) / 2;
6686            } else if (x > right - hslack) {
6687                /*
6688                 * If we are near the right edge, keep the right edge
6689                 * at the edge of the view.
6690                 */
6691                hs = right - hspace;
6692            } else if (x < left + hslack) {
6693                /*
6694                 * If we are near the left edge, keep the left edge
6695                 * at the edge of the view.
6696                 */
6697                hs = left;
6698            } else if (left > hs) {
6699                /*
6700                 * Is there whitespace visible at the left?  Fix it if so.
6701                 */
6702                hs = left;
6703            } else if (right < hs + hspace) {
6704                /*
6705                 * Is there whitespace visible at the right?  Fix it if so.
6706                 */
6707                hs = right - hspace;
6708            } else {
6709                /*
6710                 * Otherwise, float as needed.
6711                 */
6712                if (x - hs < hslack) {
6713                    hs = x - hslack;
6714                }
6715                if (x - hs > hspace - hslack) {
6716                    hs = x - (hspace - hslack);
6717                }
6718            }
6719        }
6720
6721        if (hs != mScrollX || vs != mScrollY) {
6722            if (mScroller == null) {
6723                scrollTo(hs, vs);
6724            } else {
6725                long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll;
6726                int dx = hs - mScrollX;
6727                int dy = vs - mScrollY;
6728
6729                if (duration > ANIMATED_SCROLL_GAP) {
6730                    mScroller.startScroll(mScrollX, mScrollY, dx, dy);
6731                    awakenScrollBars(mScroller.getDuration());
6732                    invalidate();
6733                } else {
6734                    if (!mScroller.isFinished()) {
6735                        mScroller.abortAnimation();
6736                    }
6737
6738                    scrollBy(dx, dy);
6739                }
6740
6741                mLastScroll = AnimationUtils.currentAnimationTimeMillis();
6742            }
6743
6744            changed = true;
6745        }
6746
6747        if (isFocused()) {
6748            // This offsets because getInterestingRect() is in terms of viewport coordinates, but
6749            // requestRectangleOnScreen() is in terms of content coordinates.
6750
6751            if (mTempRect == null) mTempRect = new Rect();
6752            mTempRect.set(x, top, x + 1, bottom);
6753            getInterestingRect(mTempRect, line);
6754            mTempRect.offset(mScrollX, mScrollY);
6755
6756            if (requestRectangleOnScreen(mTempRect)) {
6757                changed = true;
6758            }
6759        }
6760
6761        return changed;
6762    }
6763
6764    /**
6765     * Move the cursor, if needed, so that it is at an offset that is visible
6766     * to the user.  This will not move the cursor if it represents more than
6767     * one character (a selection range).  This will only work if the
6768     * TextView contains spannable text; otherwise it will do nothing.
6769     *
6770     * @return True if the cursor was actually moved, false otherwise.
6771     */
6772    public boolean moveCursorToVisibleOffset() {
6773        if (!(mText instanceof Spannable)) {
6774            return false;
6775        }
6776        int start = getSelectionStart();
6777        int end = getSelectionEnd();
6778        if (start != end) {
6779            return false;
6780        }
6781
6782        // First: make sure the line is visible on screen:
6783
6784        int line = mLayout.getLineForOffset(start);
6785
6786        final int top = mLayout.getLineTop(line);
6787        final int bottom = mLayout.getLineTop(line + 1);
6788        final int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
6789        int vslack = (bottom - top) / 2;
6790        if (vslack > vspace / 4)
6791            vslack = vspace / 4;
6792        final int vs = mScrollY;
6793
6794        if (top < (vs+vslack)) {
6795            line = mLayout.getLineForVertical(vs+vslack+(bottom-top));
6796        } else if (bottom > (vspace+vs-vslack)) {
6797            line = mLayout.getLineForVertical(vspace+vs-vslack-(bottom-top));
6798        }
6799
6800        // Next: make sure the character is visible on screen:
6801
6802        final int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6803        final int hs = mScrollX;
6804        final int leftChar = mLayout.getOffsetForHorizontal(line, hs);
6805        final int rightChar = mLayout.getOffsetForHorizontal(line, hspace+hs);
6806
6807        // line might contain bidirectional text
6808        final int lowChar = leftChar < rightChar ? leftChar : rightChar;
6809        final int highChar = leftChar > rightChar ? leftChar : rightChar;
6810
6811        int newStart = start;
6812        if (newStart < lowChar) {
6813            newStart = lowChar;
6814        } else if (newStart > highChar) {
6815            newStart = highChar;
6816        }
6817
6818        if (newStart != start) {
6819            Selection.setSelection((Spannable)mText, newStart);
6820            return true;
6821        }
6822
6823        return false;
6824    }
6825
6826    @Override
6827    public void computeScroll() {
6828        if (mScroller != null) {
6829            if (mScroller.computeScrollOffset()) {
6830                mScrollX = mScroller.getCurrX();
6831                mScrollY = mScroller.getCurrY();
6832                invalidateParentCaches();
6833                postInvalidate();  // So we draw again
6834            }
6835        }
6836    }
6837
6838    private void getInterestingRect(Rect r, int line) {
6839        convertFromViewportToContentCoordinates(r);
6840
6841        // Rectangle can can be expanded on first and last line to take
6842        // padding into account.
6843        // TODO Take left/right padding into account too?
6844        if (line == 0) r.top -= getExtendedPaddingTop();
6845        if (line == mLayout.getLineCount() - 1) r.bottom += getExtendedPaddingBottom();
6846    }
6847
6848    private void convertFromViewportToContentCoordinates(Rect r) {
6849        final int horizontalOffset = viewportToContentHorizontalOffset();
6850        r.left += horizontalOffset;
6851        r.right += horizontalOffset;
6852
6853        final int verticalOffset = viewportToContentVerticalOffset();
6854        r.top += verticalOffset;
6855        r.bottom += verticalOffset;
6856    }
6857
6858    private int viewportToContentHorizontalOffset() {
6859        return getCompoundPaddingLeft() - mScrollX;
6860    }
6861
6862    private int viewportToContentVerticalOffset() {
6863        int offset = getExtendedPaddingTop() - mScrollY;
6864        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
6865            offset += getVerticalOffset(false);
6866        }
6867        return offset;
6868    }
6869
6870    @Override
6871    public void debug(int depth) {
6872        super.debug(depth);
6873
6874        String output = debugIndent(depth);
6875        output += "frame={" + mLeft + ", " + mTop + ", " + mRight
6876                + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY
6877                + "} ";
6878
6879        if (mText != null) {
6880
6881            output += "mText=\"" + mText + "\" ";
6882            if (mLayout != null) {
6883                output += "mLayout width=" + mLayout.getWidth()
6884                        + " height=" + mLayout.getHeight();
6885            }
6886        } else {
6887            output += "mText=NULL";
6888        }
6889        Log.d(VIEW_LOG_TAG, output);
6890    }
6891
6892    /**
6893     * Convenience for {@link Selection#getSelectionStart}.
6894     */
6895    @ViewDebug.ExportedProperty(category = "text")
6896    public int getSelectionStart() {
6897        return Selection.getSelectionStart(getText());
6898    }
6899
6900    /**
6901     * Convenience for {@link Selection#getSelectionEnd}.
6902     */
6903    @ViewDebug.ExportedProperty(category = "text")
6904    public int getSelectionEnd() {
6905        return Selection.getSelectionEnd(getText());
6906    }
6907
6908    /**
6909     * Return true iff there is a selection inside this text view.
6910     */
6911    public boolean hasSelection() {
6912        final int selectionStart = getSelectionStart();
6913        final int selectionEnd = getSelectionEnd();
6914
6915        return selectionStart >= 0 && selectionStart != selectionEnd;
6916    }
6917
6918    /**
6919     * Sets the properties of this field (lines, horizontally scrolling,
6920     * transformation method) to be for a single-line input.
6921     *
6922     * @attr ref android.R.styleable#TextView_singleLine
6923     */
6924    public void setSingleLine() {
6925        setSingleLine(true);
6926    }
6927
6928    /**
6929     * Sets the properties of this field to transform input to ALL CAPS
6930     * display. This may use a "small caps" formatting if available.
6931     * This setting will be ignored if this field is editable or selectable.
6932     *
6933     * This call replaces the current transformation method. Disabling this
6934     * will not necessarily restore the previous behavior from before this
6935     * was enabled.
6936     *
6937     * @see #setTransformationMethod(TransformationMethod)
6938     * @attr ref android.R.styleable#TextView_textAllCaps
6939     */
6940    public void setAllCaps(boolean allCaps) {
6941        if (allCaps) {
6942            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
6943        } else {
6944            setTransformationMethod(null);
6945        }
6946    }
6947
6948    /**
6949     * If true, sets the properties of this field (number of lines, horizontally scrolling,
6950     * transformation method) to be for a single-line input; if false, restores these to the default
6951     * conditions.
6952     *
6953     * Note that the default conditions are not necessarily those that were in effect prior this
6954     * method, and you may want to reset these properties to your custom values.
6955     *
6956     * @attr ref android.R.styleable#TextView_singleLine
6957     */
6958    @android.view.RemotableViewMethod
6959    public void setSingleLine(boolean singleLine) {
6960        // Could be used, but may break backward compatibility.
6961        // if (mSingleLine == singleLine) return;
6962        setInputTypeSingleLine(singleLine);
6963        applySingleLine(singleLine, true, true);
6964    }
6965
6966    /**
6967     * Adds or remove the EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE on the mInputType.
6968     * @param singleLine
6969     */
6970    private void setInputTypeSingleLine(boolean singleLine) {
6971        if ((mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
6972            if (singleLine) {
6973                mInputType &= ~EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
6974            } else {
6975                mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
6976            }
6977        }
6978    }
6979
6980    private void applySingleLine(boolean singleLine, boolean applyTransformation,
6981            boolean changeMaxLines) {
6982        mSingleLine = singleLine;
6983        if (singleLine) {
6984            setLines(1);
6985            setHorizontallyScrolling(true);
6986            if (applyTransformation) {
6987                setTransformationMethod(SingleLineTransformationMethod.getInstance());
6988            }
6989        } else {
6990            if (changeMaxLines) {
6991                setMaxLines(Integer.MAX_VALUE);
6992            }
6993            setHorizontallyScrolling(false);
6994            if (applyTransformation) {
6995                setTransformationMethod(null);
6996            }
6997        }
6998    }
6999
7000    /**
7001     * Causes words in the text that are longer than the view is wide
7002     * to be ellipsized instead of broken in the middle.  You may also
7003     * want to {@link #setSingleLine} or {@link #setHorizontallyScrolling}
7004     * to constrain the text to a single line.  Use <code>null</code>
7005     * to turn off ellipsizing.
7006     *
7007     * @attr ref android.R.styleable#TextView_ellipsize
7008     */
7009    public void setEllipsize(TextUtils.TruncateAt where) {
7010        mEllipsize = where;
7011
7012        if (mLayout != null) {
7013            nullLayouts();
7014            requestLayout();
7015            invalidate();
7016        }
7017    }
7018
7019    /**
7020     * Sets how many times to repeat the marquee animation. Only applied if the
7021     * TextView has marquee enabled. Set to -1 to repeat indefinitely.
7022     *
7023     * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
7024     */
7025    public void setMarqueeRepeatLimit(int marqueeLimit) {
7026        mMarqueeRepeatLimit = marqueeLimit;
7027    }
7028
7029    /**
7030     * Returns where, if anywhere, words that are longer than the view
7031     * is wide should be ellipsized.
7032     */
7033    @ViewDebug.ExportedProperty
7034    public TextUtils.TruncateAt getEllipsize() {
7035        return mEllipsize;
7036    }
7037
7038    /**
7039     * Set the TextView so that when it takes focus, all the text is
7040     * selected.
7041     *
7042     * @attr ref android.R.styleable#TextView_selectAllOnFocus
7043     */
7044    @android.view.RemotableViewMethod
7045    public void setSelectAllOnFocus(boolean selectAllOnFocus) {
7046        mSelectAllOnFocus = selectAllOnFocus;
7047
7048        if (selectAllOnFocus && !(mText instanceof Spannable)) {
7049            setText(mText, BufferType.SPANNABLE);
7050        }
7051    }
7052
7053    /**
7054     * Set whether the cursor is visible.  The default is true.
7055     *
7056     * @attr ref android.R.styleable#TextView_cursorVisible
7057     */
7058    @android.view.RemotableViewMethod
7059    public void setCursorVisible(boolean visible) {
7060        if (mCursorVisible != visible) {
7061            mCursorVisible = visible;
7062            invalidate();
7063
7064            makeBlink();
7065
7066            // InsertionPointCursorController depends on mCursorVisible
7067            prepareCursorControllers();
7068        }
7069    }
7070
7071    private boolean isCursorVisible() {
7072        return mCursorVisible && isTextEditable();
7073    }
7074
7075    private boolean canMarquee() {
7076        int width = (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight());
7077        return width > 0 && mLayout.getLineWidth(0) > width;
7078    }
7079
7080    private void startMarquee() {
7081        // Do not ellipsize EditText
7082        if (mInput != null) return;
7083
7084        if (compressText(getWidth() - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
7085            return;
7086        }
7087
7088        if ((mMarquee == null || mMarquee.isStopped()) && (isFocused() || isSelected()) &&
7089                getLineCount() == 1 && canMarquee()) {
7090
7091            if (mMarquee == null) mMarquee = new Marquee(this);
7092            mMarquee.start(mMarqueeRepeatLimit);
7093        }
7094    }
7095
7096    private void stopMarquee() {
7097        if (mMarquee != null && !mMarquee.isStopped()) {
7098            mMarquee.stop();
7099        }
7100    }
7101
7102    private void startStopMarquee(boolean start) {
7103        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7104            if (start) {
7105                startMarquee();
7106            } else {
7107                stopMarquee();
7108            }
7109        }
7110    }
7111
7112    private static final class Marquee extends Handler {
7113        // TODO: Add an option to configure this
7114        private static final float MARQUEE_DELTA_MAX = 0.07f;
7115        private static final int MARQUEE_DELAY = 1200;
7116        private static final int MARQUEE_RESTART_DELAY = 1200;
7117        private static final int MARQUEE_RESOLUTION = 1000 / 30;
7118        private static final int MARQUEE_PIXELS_PER_SECOND = 30;
7119
7120        private static final byte MARQUEE_STOPPED = 0x0;
7121        private static final byte MARQUEE_STARTING = 0x1;
7122        private static final byte MARQUEE_RUNNING = 0x2;
7123
7124        private static final int MESSAGE_START = 0x1;
7125        private static final int MESSAGE_TICK = 0x2;
7126        private static final int MESSAGE_RESTART = 0x3;
7127
7128        private final WeakReference<TextView> mView;
7129
7130        private byte mStatus = MARQUEE_STOPPED;
7131        private final float mScrollUnit;
7132        private float mMaxScroll;
7133        float mMaxFadeScroll;
7134        private float mGhostStart;
7135        private float mGhostOffset;
7136        private float mFadeStop;
7137        private int mRepeatLimit;
7138
7139        float mScroll;
7140
7141        Marquee(TextView v) {
7142            final float density = v.getContext().getResources().getDisplayMetrics().density;
7143            mScrollUnit = (MARQUEE_PIXELS_PER_SECOND * density) / MARQUEE_RESOLUTION;
7144            mView = new WeakReference<TextView>(v);
7145        }
7146
7147        @Override
7148        public void handleMessage(Message msg) {
7149            switch (msg.what) {
7150                case MESSAGE_START:
7151                    mStatus = MARQUEE_RUNNING;
7152                    tick();
7153                    break;
7154                case MESSAGE_TICK:
7155                    tick();
7156                    break;
7157                case MESSAGE_RESTART:
7158                    if (mStatus == MARQUEE_RUNNING) {
7159                        if (mRepeatLimit >= 0) {
7160                            mRepeatLimit--;
7161                        }
7162                        start(mRepeatLimit);
7163                    }
7164                    break;
7165            }
7166        }
7167
7168        void tick() {
7169            if (mStatus != MARQUEE_RUNNING) {
7170                return;
7171            }
7172
7173            removeMessages(MESSAGE_TICK);
7174
7175            final TextView textView = mView.get();
7176            if (textView != null && (textView.isFocused() || textView.isSelected())) {
7177                mScroll += mScrollUnit;
7178                if (mScroll > mMaxScroll) {
7179                    mScroll = mMaxScroll;
7180                    sendEmptyMessageDelayed(MESSAGE_RESTART, MARQUEE_RESTART_DELAY);
7181                } else {
7182                    sendEmptyMessageDelayed(MESSAGE_TICK, MARQUEE_RESOLUTION);
7183                }
7184                textView.invalidate();
7185            }
7186        }
7187
7188        void stop() {
7189            mStatus = MARQUEE_STOPPED;
7190            removeMessages(MESSAGE_START);
7191            removeMessages(MESSAGE_RESTART);
7192            removeMessages(MESSAGE_TICK);
7193            resetScroll();
7194        }
7195
7196        private void resetScroll() {
7197            mScroll = 0.0f;
7198            final TextView textView = mView.get();
7199            if (textView != null) textView.invalidate();
7200        }
7201
7202        void start(int repeatLimit) {
7203            if (repeatLimit == 0) {
7204                stop();
7205                return;
7206            }
7207            mRepeatLimit = repeatLimit;
7208            final TextView textView = mView.get();
7209            if (textView != null && textView.mLayout != null) {
7210                mStatus = MARQUEE_STARTING;
7211                mScroll = 0.0f;
7212                final int textWidth = textView.getWidth() - textView.getCompoundPaddingLeft() -
7213                        textView.getCompoundPaddingRight();
7214                final float lineWidth = textView.mLayout.getLineWidth(0);
7215                final float gap = textWidth / 3.0f;
7216                mGhostStart = lineWidth - textWidth + gap;
7217                mMaxScroll = mGhostStart + textWidth;
7218                mGhostOffset = lineWidth + gap;
7219                mFadeStop = lineWidth + textWidth / 6.0f;
7220                mMaxFadeScroll = mGhostStart + lineWidth + lineWidth;
7221
7222                textView.invalidate();
7223                sendEmptyMessageDelayed(MESSAGE_START, MARQUEE_DELAY);
7224            }
7225        }
7226
7227        float getGhostOffset() {
7228            return mGhostOffset;
7229        }
7230
7231        boolean shouldDrawLeftFade() {
7232            return mScroll <= mFadeStop;
7233        }
7234
7235        boolean shouldDrawGhost() {
7236            return mStatus == MARQUEE_RUNNING && mScroll > mGhostStart;
7237        }
7238
7239        boolean isRunning() {
7240            return mStatus == MARQUEE_RUNNING;
7241        }
7242
7243        boolean isStopped() {
7244            return mStatus == MARQUEE_STOPPED;
7245        }
7246    }
7247
7248    /**
7249     * This method is called when the text is changed, in case any subclasses
7250     * would like to know.
7251     *
7252     * Within <code>text</code>, the <code>lengthAfter</code> characters
7253     * beginning at <code>start</code> have just replaced old text that had
7254     * length <code>lengthBefore</code>. It is an error to attempt to make
7255     * changes to <code>text</code> from this callback.
7256     *
7257     * @param text The text the TextView is displaying
7258     * @param start The offset of the start of the range of the text that was
7259     * modified
7260     * @param lengthBefore The length of the former text that has been replaced
7261     * @param lengthAfter The length of the replacement modified text
7262     */
7263    protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
7264        // intentionally empty
7265    }
7266
7267    /**
7268     * This method is called when the selection has changed, in case any
7269     * subclasses would like to know.
7270     *
7271     * @param selStart The new selection start location.
7272     * @param selEnd The new selection end location.
7273     */
7274    protected void onSelectionChanged(int selStart, int selEnd) {
7275        sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED);
7276    }
7277
7278    /**
7279     * Adds a TextWatcher to the list of those whose methods are called
7280     * whenever this TextView's text changes.
7281     * <p>
7282     * In 1.0, the {@link TextWatcher#afterTextChanged} method was erroneously
7283     * not called after {@link #setText} calls.  Now, doing {@link #setText}
7284     * if there are any text changed listeners forces the buffer type to
7285     * Editable if it would not otherwise be and does call this method.
7286     */
7287    public void addTextChangedListener(TextWatcher watcher) {
7288        if (mListeners == null) {
7289            mListeners = new ArrayList<TextWatcher>();
7290        }
7291
7292        mListeners.add(watcher);
7293    }
7294
7295    /**
7296     * Removes the specified TextWatcher from the list of those whose
7297     * methods are called
7298     * whenever this TextView's text changes.
7299     */
7300    public void removeTextChangedListener(TextWatcher watcher) {
7301        if (mListeners != null) {
7302            int i = mListeners.indexOf(watcher);
7303
7304            if (i >= 0) {
7305                mListeners.remove(i);
7306            }
7307        }
7308    }
7309
7310    private void sendBeforeTextChanged(CharSequence text, int start, int before,
7311                                   int after) {
7312        if (mListeners != null) {
7313            final ArrayList<TextWatcher> list = mListeners;
7314            final int count = list.size();
7315            for (int i = 0; i < count; i++) {
7316                list.get(i).beforeTextChanged(text, start, before, after);
7317            }
7318        }
7319    }
7320
7321    /**
7322     * Not private so it can be called from an inner class without going
7323     * through a thunk.
7324     */
7325    void sendOnTextChanged(CharSequence text, int start, int before,
7326                                   int after) {
7327        if (mListeners != null) {
7328            final ArrayList<TextWatcher> list = mListeners;
7329            final int count = list.size();
7330            for (int i = 0; i < count; i++) {
7331                list.get(i).onTextChanged(text, start, before, after);
7332            }
7333        }
7334    }
7335
7336    /**
7337     * Not private so it can be called from an inner class without going
7338     * through a thunk.
7339     */
7340    void sendAfterTextChanged(Editable text) {
7341        if (mListeners != null) {
7342            final ArrayList<TextWatcher> list = mListeners;
7343            final int count = list.size();
7344            for (int i = 0; i < count; i++) {
7345                list.get(i).afterTextChanged(text);
7346            }
7347        }
7348    }
7349
7350    /**
7351     * Not private so it can be called from an inner class without going
7352     * through a thunk.
7353     */
7354    void handleTextChanged(CharSequence buffer, int start, int before, int after) {
7355        final InputMethodState ims = mInputMethodState;
7356        if (ims == null || ims.mBatchEditNesting == 0) {
7357            updateAfterEdit();
7358        }
7359        if (ims != null) {
7360            ims.mContentChanged = true;
7361            if (ims.mChangedStart < 0) {
7362                ims.mChangedStart = start;
7363                ims.mChangedEnd = start+before;
7364            } else {
7365                ims.mChangedStart = Math.min(ims.mChangedStart, start);
7366                ims.mChangedEnd = Math.max(ims.mChangedEnd, start + before - ims.mChangedDelta);
7367            }
7368            ims.mChangedDelta += after-before;
7369        }
7370
7371        sendOnTextChanged(buffer, start, before, after);
7372        onTextChanged(buffer, start, before, after);
7373
7374        // Hide the controllers if the amount of content changed
7375        if (before != after) {
7376            hideControllers();
7377        }
7378    }
7379
7380    /**
7381     * Not private so it can be called from an inner class without going
7382     * through a thunk.
7383     */
7384    void spanChange(Spanned buf, Object what, int oldStart, int newStart, int oldEnd, int newEnd) {
7385        // XXX Make the start and end move together if this ends up
7386        // spending too much time invalidating.
7387
7388        boolean selChanged = false;
7389        int newSelStart=-1, newSelEnd=-1;
7390
7391        final InputMethodState ims = mInputMethodState;
7392
7393        if (what == Selection.SELECTION_END) {
7394            mHighlightPathBogus = true;
7395            selChanged = true;
7396            newSelEnd = newStart;
7397
7398            if (!isFocused()) {
7399                mSelectionMoved = true;
7400            }
7401
7402            if (oldStart >= 0 || newStart >= 0) {
7403                invalidateCursor(Selection.getSelectionStart(buf), oldStart, newStart);
7404                registerForPreDraw();
7405                makeBlink();
7406            }
7407        }
7408
7409        if (what == Selection.SELECTION_START) {
7410            mHighlightPathBogus = true;
7411            selChanged = true;
7412            newSelStart = newStart;
7413
7414            if (!isFocused()) {
7415                mSelectionMoved = true;
7416            }
7417
7418            if (oldStart >= 0 || newStart >= 0) {
7419                int end = Selection.getSelectionEnd(buf);
7420                invalidateCursor(end, oldStart, newStart);
7421            }
7422        }
7423
7424        if (selChanged) {
7425            if ((buf.getSpanFlags(what)&Spanned.SPAN_INTERMEDIATE) == 0) {
7426                if (newSelStart < 0) {
7427                    newSelStart = Selection.getSelectionStart(buf);
7428                }
7429                if (newSelEnd < 0) {
7430                    newSelEnd = Selection.getSelectionEnd(buf);
7431                }
7432                onSelectionChanged(newSelStart, newSelEnd);
7433            }
7434        }
7435
7436        if (what instanceof UpdateAppearance ||
7437            what instanceof ParagraphStyle) {
7438            if (ims == null || ims.mBatchEditNesting == 0) {
7439                invalidate();
7440                mHighlightPathBogus = true;
7441                checkForResize();
7442            } else {
7443                ims.mContentChanged = true;
7444            }
7445        }
7446
7447        if (MetaKeyKeyListener.isMetaTracker(buf, what)) {
7448            mHighlightPathBogus = true;
7449            if (ims != null && MetaKeyKeyListener.isSelectingMetaTracker(buf, what)) {
7450                ims.mSelectionModeChanged = true;
7451            }
7452
7453            if (Selection.getSelectionStart(buf) >= 0) {
7454                if (ims == null || ims.mBatchEditNesting == 0) {
7455                    invalidateCursor();
7456                } else {
7457                    ims.mCursorChanged = true;
7458                }
7459            }
7460        }
7461
7462        if (what instanceof ParcelableSpan) {
7463            // If this is a span that can be sent to a remote process,
7464            // the current extract editor would be interested in it.
7465            if (ims != null && ims.mExtracting != null) {
7466                if (ims.mBatchEditNesting != 0) {
7467                    if (oldStart >= 0) {
7468                        if (ims.mChangedStart > oldStart) {
7469                            ims.mChangedStart = oldStart;
7470                        }
7471                        if (ims.mChangedStart > oldEnd) {
7472                            ims.mChangedStart = oldEnd;
7473                        }
7474                    }
7475                    if (newStart >= 0) {
7476                        if (ims.mChangedStart > newStart) {
7477                            ims.mChangedStart = newStart;
7478                        }
7479                        if (ims.mChangedStart > newEnd) {
7480                            ims.mChangedStart = newEnd;
7481                        }
7482                    }
7483                } else {
7484                    if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Span change outside of batch: "
7485                            + oldStart + "-" + oldEnd + ","
7486                            + newStart + "-" + newEnd + what);
7487                    ims.mContentChanged = true;
7488                }
7489            }
7490        }
7491    }
7492
7493    private class ChangeWatcher
7494    implements TextWatcher, SpanWatcher {
7495
7496        private CharSequence mBeforeText;
7497
7498        public void beforeTextChanged(CharSequence buffer, int start,
7499                                      int before, int after) {
7500            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "beforeTextChanged start=" + start
7501                    + " before=" + before + " after=" + after + ": " + buffer);
7502
7503            if (AccessibilityManager.getInstance(mContext).isEnabled()
7504                    && !isPasswordInputType(mInputType)
7505                    && !hasPasswordTransformationMethod()) {
7506                mBeforeText = buffer.toString();
7507            }
7508
7509            TextView.this.sendBeforeTextChanged(buffer, start, before, after);
7510        }
7511
7512        public void onTextChanged(CharSequence buffer, int start,
7513                                  int before, int after) {
7514            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onTextChanged start=" + start
7515                    + " before=" + before + " after=" + after + ": " + buffer);
7516            TextView.this.handleTextChanged(buffer, start, before, after);
7517
7518            if (AccessibilityManager.getInstance(mContext).isEnabled() &&
7519                    (isFocused() || isSelected() &&
7520                    isShown())) {
7521                sendAccessibilityEventTypeViewTextChanged(mBeforeText, start, before, after);
7522                mBeforeText = null;
7523            }
7524        }
7525
7526        public void afterTextChanged(Editable buffer) {
7527            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "afterTextChanged: " + buffer);
7528            TextView.this.sendAfterTextChanged(buffer);
7529
7530            if (MetaKeyKeyListener.getMetaState(buffer,
7531                                 MetaKeyKeyListener.META_SELECTING) != 0) {
7532                MetaKeyKeyListener.stopSelecting(TextView.this, buffer);
7533            }
7534        }
7535
7536        public void onSpanChanged(Spannable buf,
7537                                  Object what, int s, int e, int st, int en) {
7538            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanChanged s=" + s + " e=" + e
7539                    + " st=" + st + " en=" + en + " what=" + what + ": " + buf);
7540            TextView.this.spanChange(buf, what, s, st, e, en);
7541        }
7542
7543        public void onSpanAdded(Spannable buf, Object what, int s, int e) {
7544            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanAdded s=" + s + " e=" + e
7545                    + " what=" + what + ": " + buf);
7546            TextView.this.spanChange(buf, what, -1, s, -1, e);
7547        }
7548
7549        public void onSpanRemoved(Spannable buf, Object what, int s, int e) {
7550            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanRemoved s=" + s + " e=" + e
7551                    + " what=" + what + ": " + buf);
7552            TextView.this.spanChange(buf, what, s, -1, e, -1);
7553        }
7554    }
7555
7556    /**
7557     * @hide
7558     */
7559    @Override
7560    public void dispatchFinishTemporaryDetach() {
7561        mDispatchTemporaryDetach = true;
7562        super.dispatchFinishTemporaryDetach();
7563        mDispatchTemporaryDetach = false;
7564    }
7565
7566    @Override
7567    public void onStartTemporaryDetach() {
7568        super.onStartTemporaryDetach();
7569        // Only track when onStartTemporaryDetach() is called directly,
7570        // usually because this instance is an editable field in a list
7571        if (!mDispatchTemporaryDetach) mTemporaryDetach = true;
7572
7573        // Because of View recycling in ListView, there is no easy way to know when a TextView with
7574        // selection becomes visible again. Until a better solution is found, stop text selection
7575        // mode (if any) as soon as this TextView is recycled.
7576        stopSelectionActionMode();
7577    }
7578
7579    @Override
7580    public void onFinishTemporaryDetach() {
7581        super.onFinishTemporaryDetach();
7582        // Only track when onStartTemporaryDetach() is called directly,
7583        // usually because this instance is an editable field in a list
7584        if (!mDispatchTemporaryDetach) mTemporaryDetach = false;
7585    }
7586
7587    @Override
7588    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
7589        if (mTemporaryDetach) {
7590            // If we are temporarily in the detach state, then do nothing.
7591            super.onFocusChanged(focused, direction, previouslyFocusedRect);
7592            return;
7593        }
7594
7595        mShowCursor = SystemClock.uptimeMillis();
7596
7597        ensureEndedBatchEdit();
7598
7599        if (focused) {
7600            int selStart = getSelectionStart();
7601            int selEnd = getSelectionEnd();
7602
7603            // SelectAllOnFocus fields are highlighted and not selected. Do not start text selection
7604            // mode for these, unless there was a specific selection already started.
7605            final boolean isFocusHighlighted = mSelectAllOnFocus && selStart == 0 &&
7606                    selEnd == mText.length();
7607            mCreatedWithASelection = mFrozenWithFocus && hasSelection() && !isFocusHighlighted;
7608
7609            if (!mFrozenWithFocus || (selStart < 0 || selEnd < 0)) {
7610                // If a tap was used to give focus to that view, move cursor at tap position.
7611                // Has to be done before onTakeFocus, which can be overloaded.
7612                final int lastTapPosition = getLastTapPosition();
7613                if (lastTapPosition >= 0) {
7614                    Selection.setSelection((Spannable) mText, lastTapPosition);
7615                }
7616
7617                if (mMovement != null) {
7618                    mMovement.onTakeFocus(this, (Spannable) mText, direction);
7619                }
7620
7621                // The DecorView does not have focus when the 'Done' ExtractEditText button is
7622                // pressed. Since it is the ViewAncestor's mView, it requests focus before
7623                // ExtractEditText clears focus, which gives focus to the ExtractEditText.
7624                // This special case ensure that we keep current selection in that case.
7625                // It would be better to know why the DecorView does not have focus at that time.
7626                if (((this instanceof ExtractEditText) || mSelectionMoved) &&
7627                        selStart >= 0 && selEnd >= 0) {
7628                    /*
7629                     * Someone intentionally set the selection, so let them
7630                     * do whatever it is that they wanted to do instead of
7631                     * the default on-focus behavior.  We reset the selection
7632                     * here instead of just skipping the onTakeFocus() call
7633                     * because some movement methods do something other than
7634                     * just setting the selection in theirs and we still
7635                     * need to go through that path.
7636                     */
7637                    Selection.setSelection((Spannable) mText, selStart, selEnd);
7638                }
7639
7640                if (mSelectAllOnFocus) {
7641                    selectAll();
7642                }
7643
7644                mTouchFocusSelected = true;
7645            }
7646
7647            mFrozenWithFocus = false;
7648            mSelectionMoved = false;
7649
7650            if (mText instanceof Spannable) {
7651                Spannable sp = (Spannable) mText;
7652                MetaKeyKeyListener.resetMetaState(sp);
7653            }
7654
7655            makeBlink();
7656
7657            if (mError != null) {
7658                showError();
7659            }
7660        } else {
7661            if (mError != null) {
7662                hideError();
7663            }
7664            // Don't leave us in the middle of a batch edit.
7665            onEndBatchEdit();
7666
7667            if (this instanceof ExtractEditText) {
7668                // terminateTextSelectionMode removes selection, which we want to keep when
7669                // ExtractEditText goes out of focus.
7670                final int selStart = getSelectionStart();
7671                final int selEnd = getSelectionEnd();
7672                hideControllers();
7673                Selection.setSelection((Spannable) mText, selStart, selEnd);
7674            } else {
7675                hideControllers();
7676            }
7677
7678            // No need to create the controller
7679            if (mSelectionModifierCursorController != null) {
7680                mSelectionModifierCursorController.resetTouchOffsets();
7681            }
7682        }
7683
7684        startStopMarquee(focused);
7685
7686        if (mTransformation != null) {
7687            mTransformation.onFocusChanged(this, mText, focused, direction, previouslyFocusedRect);
7688        }
7689
7690        super.onFocusChanged(focused, direction, previouslyFocusedRect);
7691    }
7692
7693    private int getLastTapPosition() {
7694        // No need to create the controller at that point, no last tap position saved
7695        if (mSelectionModifierCursorController != null) {
7696            int lastTapPosition = mSelectionModifierCursorController.getMinTouchOffset();
7697            if (lastTapPosition >= 0) {
7698                // Safety check, should not be possible.
7699                if (lastTapPosition > mText.length()) {
7700                    Log.e(LOG_TAG, "Invalid tap focus position (" + lastTapPosition + " vs "
7701                            + mText.length() + ")");
7702                    lastTapPosition = mText.length();
7703                }
7704                return lastTapPosition;
7705            }
7706        }
7707
7708        return -1;
7709    }
7710
7711    @Override
7712    public void onWindowFocusChanged(boolean hasWindowFocus) {
7713        super.onWindowFocusChanged(hasWindowFocus);
7714
7715        if (hasWindowFocus) {
7716            if (mBlink != null) {
7717                mBlink.uncancel();
7718                makeBlink();
7719            }
7720        } else {
7721            if (mBlink != null) {
7722                mBlink.cancel();
7723            }
7724            // Don't leave us in the middle of a batch edit.
7725            onEndBatchEdit();
7726            if (mInputContentType != null) {
7727                mInputContentType.enterDown = false;
7728            }
7729            hideControllers();
7730            removeAllSuggestionSpans();
7731        }
7732
7733        startStopMarquee(hasWindowFocus);
7734    }
7735
7736    private void removeAllSuggestionSpans() {
7737        if (mText instanceof Editable) {
7738            Editable editable = ((Editable) mText);
7739            SuggestionSpan[] spans = editable.getSpans(0, mText.length(), SuggestionSpan.class);
7740            final int length = spans.length;
7741            for (int i = 0; i < length; i++) {
7742                editable.removeSpan(spans[i]);
7743            }
7744        }
7745    }
7746
7747    @Override
7748    protected void onVisibilityChanged(View changedView, int visibility) {
7749        super.onVisibilityChanged(changedView, visibility);
7750        if (visibility != VISIBLE) {
7751            hideControllers();
7752        }
7753    }
7754
7755    /**
7756     * Use {@link BaseInputConnection#removeComposingSpans
7757     * BaseInputConnection.removeComposingSpans()} to remove any IME composing
7758     * state from this text view.
7759     */
7760    public void clearComposingText() {
7761        if (mText instanceof Spannable) {
7762            BaseInputConnection.removeComposingSpans((Spannable)mText);
7763        }
7764    }
7765
7766    @Override
7767    public void setSelected(boolean selected) {
7768        boolean wasSelected = isSelected();
7769
7770        super.setSelected(selected);
7771
7772        if (selected != wasSelected && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7773            if (selected) {
7774                startMarquee();
7775            } else {
7776                stopMarquee();
7777            }
7778        }
7779    }
7780
7781    @Override
7782    public boolean onTouchEvent(MotionEvent event) {
7783        final int action = event.getActionMasked();
7784
7785        if (hasSelectionController()) {
7786            getSelectionController().onTouchEvent(event);
7787        }
7788
7789        if (action == MotionEvent.ACTION_DOWN) {
7790            mLastDownPositionX = event.getX();
7791            mLastDownPositionY = event.getY();
7792
7793            // Reset this state; it will be re-set if super.onTouchEvent
7794            // causes focus to move to the view.
7795            mTouchFocusSelected = false;
7796            mIgnoreActionUpEvent = false;
7797        }
7798
7799        final boolean superResult = super.onTouchEvent(event);
7800
7801        /*
7802         * Don't handle the release after a long press, because it will
7803         * move the selection away from whatever the menu action was
7804         * trying to affect.
7805         */
7806        if (mDiscardNextActionUp && action == MotionEvent.ACTION_UP) {
7807            mDiscardNextActionUp = false;
7808            return superResult;
7809        }
7810
7811        final boolean touchIsFinished = action == MotionEvent.ACTION_UP && !mIgnoreActionUpEvent &&
7812                isFocused();
7813
7814        if ((mMovement != null || onCheckIsTextEditor()) && isEnabled()
7815                && mText instanceof Spannable && mLayout != null) {
7816            boolean handled = false;
7817
7818            if (mMovement != null) {
7819                handled |= mMovement.onTouchEvent(this, (Spannable) mText, event);
7820            }
7821
7822            if (mLinksClickable && mAutoLinkMask != 0 && mTextIsSelectable && touchIsFinished) {
7823                // The LinkMovementMethod which should handle taps on links has not been installed
7824                // to support text selection. We reproduce its behavior here to open links.
7825                ClickableSpan[] links = ((Spannable) mText).getSpans(getSelectionStart(),
7826                        getSelectionEnd(), ClickableSpan.class);
7827
7828                if (links.length != 0) {
7829                    links[0].onClick(this);
7830                    handled = true;
7831                }
7832            }
7833
7834            if ((isTextEditable() || mTextIsSelectable) && touchIsFinished) {
7835                // Show the IME, except when selecting in read-only text.
7836                final InputMethodManager imm = InputMethodManager.peekInstance();
7837                if (imm != null) {
7838                    imm.viewClicked(this);
7839                }
7840                if (!mTextIsSelectable) {
7841                    handled |= imm != null && imm.showSoftInput(this, 0);
7842                }
7843
7844                boolean selectAllGotFocus = mSelectAllOnFocus && didTouchFocusSelect();
7845                if (!selectAllGotFocus && hasSelection()) {
7846                    startSelectionActionMode();
7847                } else {
7848                    stopSelectionActionMode();
7849                    hideSuggestions();
7850                    if (hasInsertionController() && !selectAllGotFocus && mText.length() > 0) {
7851                        getInsertionController().show();
7852                    }
7853                }
7854            }
7855
7856            if (handled) {
7857                return true;
7858            }
7859        }
7860
7861        return superResult;
7862    }
7863
7864    @Override
7865    public boolean onGenericMotionEvent(MotionEvent event) {
7866        if (mMovement != null && mText instanceof Spannable && mLayout != null) {
7867            try {
7868                if (mMovement.onGenericMotionEvent(this, (Spannable) mText, event)) {
7869                    return true;
7870                }
7871            } catch (AbstractMethodError ex) {
7872                // onGenericMotionEvent was added to the MovementMethod interface in API 12.
7873                // Ignore its absence in case third party applications implemented the
7874                // interface directly.
7875            }
7876        }
7877        return super.onGenericMotionEvent(event);
7878    }
7879
7880    private void prepareCursorControllers() {
7881        boolean windowSupportsHandles = false;
7882
7883        ViewGroup.LayoutParams params = getRootView().getLayoutParams();
7884        if (params instanceof WindowManager.LayoutParams) {
7885            WindowManager.LayoutParams windowParams = (WindowManager.LayoutParams) params;
7886            windowSupportsHandles = windowParams.type < WindowManager.LayoutParams.FIRST_SUB_WINDOW
7887                    || windowParams.type > WindowManager.LayoutParams.LAST_SUB_WINDOW;
7888        }
7889
7890        mInsertionControllerEnabled = windowSupportsHandles && isCursorVisible() && mLayout != null;
7891        mSelectionControllerEnabled = windowSupportsHandles && textCanBeSelected() &&
7892                mLayout != null;
7893
7894        if (!mInsertionControllerEnabled) {
7895            hideInsertionPointCursorController();
7896            if (mInsertionPointCursorController != null) {
7897                mInsertionPointCursorController.onDetached();
7898                mInsertionPointCursorController = null;
7899            }
7900        }
7901
7902        if (!mSelectionControllerEnabled) {
7903            stopSelectionActionMode();
7904            if (mSelectionModifierCursorController != null) {
7905                mSelectionModifierCursorController.onDetached();
7906                mSelectionModifierCursorController = null;
7907            }
7908        }
7909    }
7910
7911    /**
7912     * @return True iff this TextView contains a text that can be edited, or if this is
7913     * a selectable TextView.
7914     */
7915    private boolean isTextEditable() {
7916        return mText instanceof Editable && onCheckIsTextEditor() && isEnabled();
7917    }
7918
7919    /**
7920     * Returns true, only while processing a touch gesture, if the initial
7921     * touch down event caused focus to move to the text view and as a result
7922     * its selection changed.  Only valid while processing the touch gesture
7923     * of interest.
7924     */
7925    public boolean didTouchFocusSelect() {
7926        return mTouchFocusSelected;
7927    }
7928
7929    @Override
7930    public void cancelLongPress() {
7931        super.cancelLongPress();
7932        mIgnoreActionUpEvent = true;
7933    }
7934
7935    @Override
7936    public boolean onTrackballEvent(MotionEvent event) {
7937        if (mMovement != null && mText instanceof Spannable &&
7938            mLayout != null) {
7939            if (mMovement.onTrackballEvent(this, (Spannable) mText, event)) {
7940                return true;
7941            }
7942        }
7943
7944        return super.onTrackballEvent(event);
7945    }
7946
7947    public void setScroller(Scroller s) {
7948        mScroller = s;
7949    }
7950
7951    private static class Blink extends Handler implements Runnable {
7952        private final WeakReference<TextView> mView;
7953        private boolean mCancelled;
7954
7955        public Blink(TextView v) {
7956            mView = new WeakReference<TextView>(v);
7957        }
7958
7959        public void run() {
7960            if (mCancelled) {
7961                return;
7962            }
7963
7964            removeCallbacks(Blink.this);
7965
7966            TextView tv = mView.get();
7967
7968            if (tv != null && tv.shouldBlink()) {
7969                if (tv.mLayout != null) {
7970                    tv.invalidateCursorPath();
7971                }
7972
7973                postAtTime(this, SystemClock.uptimeMillis() + BLINK);
7974            }
7975        }
7976
7977        void cancel() {
7978            if (!mCancelled) {
7979                removeCallbacks(Blink.this);
7980                mCancelled = true;
7981            }
7982        }
7983
7984        void uncancel() {
7985            mCancelled = false;
7986        }
7987    }
7988
7989    /**
7990     * @return True when the TextView isFocused and has a valid zero-length selection (cursor).
7991     */
7992    private boolean shouldBlink() {
7993        if (!isFocused()) return false;
7994
7995        final int start = getSelectionStart();
7996        if (start < 0) return false;
7997
7998        final int end = getSelectionEnd();
7999        if (end < 0) return false;
8000
8001        return start == end;
8002    }
8003
8004    private void makeBlink() {
8005        if (isCursorVisible()) {
8006            if (shouldBlink()) {
8007                mShowCursor = SystemClock.uptimeMillis();
8008                if (mBlink == null) mBlink = new Blink(this);
8009                mBlink.removeCallbacks(mBlink);
8010                mBlink.postAtTime(mBlink, mShowCursor + BLINK);
8011            }
8012        } else {
8013            if (mBlink != null) mBlink.removeCallbacks(mBlink);
8014        }
8015    }
8016
8017    @Override
8018    protected float getLeftFadingEdgeStrength() {
8019        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
8020        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
8021            if (mMarquee != null && !mMarquee.isStopped()) {
8022                final Marquee marquee = mMarquee;
8023                if (marquee.shouldDrawLeftFade()) {
8024                    return marquee.mScroll / getHorizontalFadingEdgeLength();
8025                } else {
8026                    return 0.0f;
8027                }
8028            } else if (getLineCount() == 1) {
8029                final int layoutDirection = getResolvedLayoutDirection();
8030                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8031                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8032                    case Gravity.LEFT:
8033                        return 0.0f;
8034                    case Gravity.RIGHT:
8035                        return (mLayout.getLineRight(0) - (mRight - mLeft) -
8036                                getCompoundPaddingLeft() - getCompoundPaddingRight() -
8037                                mLayout.getLineLeft(0)) / getHorizontalFadingEdgeLength();
8038                    case Gravity.CENTER_HORIZONTAL:
8039                        return 0.0f;
8040                }
8041            }
8042        }
8043        return super.getLeftFadingEdgeStrength();
8044    }
8045
8046    @Override
8047    protected float getRightFadingEdgeStrength() {
8048        if (mCurrentAlpha <= ViewConfiguration.ALPHA_THRESHOLD_INT) return 0.0f;
8049        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
8050            if (mMarquee != null && !mMarquee.isStopped()) {
8051                final Marquee marquee = mMarquee;
8052                return (marquee.mMaxFadeScroll - marquee.mScroll) / getHorizontalFadingEdgeLength();
8053            } else if (getLineCount() == 1) {
8054                final int layoutDirection = getResolvedLayoutDirection();
8055                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8056                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8057                    case Gravity.LEFT:
8058                        final int textWidth = (mRight - mLeft) - getCompoundPaddingLeft() -
8059                                getCompoundPaddingRight();
8060                        final float lineWidth = mLayout.getLineWidth(0);
8061                        return (lineWidth - textWidth) / getHorizontalFadingEdgeLength();
8062                    case Gravity.RIGHT:
8063                        return 0.0f;
8064                    case Gravity.CENTER_HORIZONTAL:
8065                    case Gravity.FILL_HORIZONTAL:
8066                        return (mLayout.getLineWidth(0) - ((mRight - mLeft) -
8067                                getCompoundPaddingLeft() - getCompoundPaddingRight())) /
8068                                getHorizontalFadingEdgeLength();
8069                }
8070            }
8071        }
8072        return super.getRightFadingEdgeStrength();
8073    }
8074
8075    @Override
8076    protected int computeHorizontalScrollRange() {
8077        if (mLayout != null) {
8078            return mSingleLine && (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) == Gravity.LEFT ?
8079                    (int) mLayout.getLineWidth(0) : mLayout.getWidth();
8080        }
8081
8082        return super.computeHorizontalScrollRange();
8083    }
8084
8085    @Override
8086    protected int computeVerticalScrollRange() {
8087        if (mLayout != null)
8088            return mLayout.getHeight();
8089
8090        return super.computeVerticalScrollRange();
8091    }
8092
8093    @Override
8094    protected int computeVerticalScrollExtent() {
8095        return getHeight() - getCompoundPaddingTop() - getCompoundPaddingBottom();
8096    }
8097
8098    @Override
8099    public void findViewsWithText(ArrayList<View> outViews, CharSequence searched) {
8100        if (TextUtils.isEmpty(searched)) {
8101            return;
8102        }
8103        CharSequence thisText = getText();
8104        if (TextUtils.isEmpty(thisText)) {
8105            return;
8106        }
8107        String searchedLowerCase = searched.toString().toLowerCase();
8108        String thisTextLowerCase = thisText.toString().toLowerCase();
8109        if (thisTextLowerCase.contains(searchedLowerCase)) {
8110            outViews.add(this);
8111        }
8112    }
8113
8114    public enum BufferType {
8115        NORMAL, SPANNABLE, EDITABLE,
8116    }
8117
8118    /**
8119     * Returns the TextView_textColor attribute from the
8120     * Resources.StyledAttributes, if set, or the TextAppearance_textColor
8121     * from the TextView_textAppearance attribute, if TextView_textColor
8122     * was not set directly.
8123     */
8124    public static ColorStateList getTextColors(Context context, TypedArray attrs) {
8125        ColorStateList colors;
8126        colors = attrs.getColorStateList(com.android.internal.R.styleable.
8127                                         TextView_textColor);
8128
8129        if (colors == null) {
8130            int ap = attrs.getResourceId(com.android.internal.R.styleable.
8131                                         TextView_textAppearance, -1);
8132            if (ap != -1) {
8133                TypedArray appearance;
8134                appearance = context.obtainStyledAttributes(ap,
8135                                            com.android.internal.R.styleable.TextAppearance);
8136                colors = appearance.getColorStateList(com.android.internal.R.styleable.
8137                                                  TextAppearance_textColor);
8138                appearance.recycle();
8139            }
8140        }
8141
8142        return colors;
8143    }
8144
8145    /**
8146     * Returns the default color from the TextView_textColor attribute
8147     * from the AttributeSet, if set, or the default color from the
8148     * TextAppearance_textColor from the TextView_textAppearance attribute,
8149     * if TextView_textColor was not set directly.
8150     */
8151    public static int getTextColor(Context context,
8152                                   TypedArray attrs,
8153                                   int def) {
8154        ColorStateList colors = getTextColors(context, attrs);
8155
8156        if (colors == null) {
8157            return def;
8158        } else {
8159            return colors.getDefaultColor();
8160        }
8161    }
8162
8163    @Override
8164    public boolean onKeyShortcut(int keyCode, KeyEvent event) {
8165        final int filteredMetaState = event.getMetaState() & ~KeyEvent.META_CTRL_MASK;
8166        if (KeyEvent.metaStateHasNoModifiers(filteredMetaState)) {
8167            switch (keyCode) {
8168            case KeyEvent.KEYCODE_A:
8169                if (canSelectText()) {
8170                    return onTextContextMenuItem(ID_SELECT_ALL);
8171                }
8172                break;
8173            case KeyEvent.KEYCODE_X:
8174                if (canCut()) {
8175                    return onTextContextMenuItem(ID_CUT);
8176                }
8177                break;
8178            case KeyEvent.KEYCODE_C:
8179                if (canCopy()) {
8180                    return onTextContextMenuItem(ID_COPY);
8181                }
8182                break;
8183            case KeyEvent.KEYCODE_V:
8184                if (canPaste()) {
8185                    return onTextContextMenuItem(ID_PASTE);
8186                }
8187                break;
8188            }
8189        }
8190        return super.onKeyShortcut(keyCode, event);
8191    }
8192
8193    /**
8194     * Unlike {@link #textCanBeSelected()}, this method is based on the <i>current</i> state of the
8195     * TextView. {@link #textCanBeSelected()} has to be true (this is one of the conditions to have
8196     * a selection controller (see {@link #prepareCursorControllers()}), but this is not sufficient.
8197     */
8198    private boolean canSelectText() {
8199        return hasSelectionController() && mText.length() != 0;
8200    }
8201
8202    /**
8203     * Test based on the <i>intrinsic</i> charateristics of the TextView.
8204     * The text must be spannable and the movement method must allow for arbitary selection.
8205     *
8206     * See also {@link #canSelectText()}.
8207     */
8208    private boolean textCanBeSelected() {
8209        // prepareCursorController() relies on this method.
8210        // If you change this condition, make sure prepareCursorController is called anywhere
8211        // the value of this condition might be changed.
8212        if (mMovement == null || !mMovement.canSelectArbitrarily()) return false;
8213        return isTextEditable() || (mTextIsSelectable && mText instanceof Spannable && isEnabled());
8214    }
8215
8216    private boolean canCut() {
8217        if (hasPasswordTransformationMethod()) {
8218            return false;
8219        }
8220
8221        if (mText.length() > 0 && hasSelection() && mText instanceof Editable && mInput != null) {
8222            return true;
8223        }
8224
8225        return false;
8226    }
8227
8228    private boolean canCopy() {
8229        if (hasPasswordTransformationMethod()) {
8230            return false;
8231        }
8232
8233        if (mText.length() > 0 && hasSelection()) {
8234            return true;
8235        }
8236
8237        return false;
8238    }
8239
8240    private boolean canPaste() {
8241        return (mText instanceof Editable &&
8242                mInput != null &&
8243                getSelectionStart() >= 0 &&
8244                getSelectionEnd() >= 0 &&
8245                ((ClipboardManager)getContext().getSystemService(Context.CLIPBOARD_SERVICE)).
8246                hasPrimaryClip());
8247    }
8248
8249    private static long packRangeInLong(int start, int end) {
8250        return (((long) start) << 32) | end;
8251    }
8252
8253    private static int extractRangeStartFromLong(long range) {
8254        return (int) (range >>> 32);
8255    }
8256
8257    private static int extractRangeEndFromLong(long range) {
8258        return (int) (range & 0x00000000FFFFFFFFL);
8259    }
8260
8261    private boolean selectAll() {
8262        final int length = mText.length();
8263        Selection.setSelection((Spannable) mText, 0, length);
8264        return length > 0;
8265    }
8266
8267    /**
8268     * Adjusts selection to the word under last touch offset.
8269     * Return true if the operation was successfully performed.
8270     */
8271    private boolean selectCurrentWord() {
8272        if (!canSelectText()) {
8273            return false;
8274        }
8275
8276        if (hasPasswordTransformationMethod()) {
8277            // Always select all on a password field.
8278            // Cut/copy menu entries are not available for passwords, but being able to select all
8279            // is however useful to delete or paste to replace the entire content.
8280            return selectAll();
8281        }
8282
8283        int klass = mInputType & InputType.TYPE_MASK_CLASS;
8284        int variation = mInputType & InputType.TYPE_MASK_VARIATION;
8285
8286        // Specific text field types: select the entire text for these
8287        if (klass == InputType.TYPE_CLASS_NUMBER ||
8288                klass == InputType.TYPE_CLASS_PHONE ||
8289                klass == InputType.TYPE_CLASS_DATETIME ||
8290                variation == InputType.TYPE_TEXT_VARIATION_URI ||
8291                variation == InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS ||
8292                variation == InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS ||
8293                variation == InputType.TYPE_TEXT_VARIATION_FILTER) {
8294            return selectAll();
8295        }
8296
8297        long lastTouchOffsets = getLastTouchOffsets();
8298        final int minOffset = extractRangeStartFromLong(lastTouchOffsets);
8299        final int maxOffset = extractRangeEndFromLong(lastTouchOffsets);
8300
8301        // Safety check in case standard touch event handling has been bypassed
8302        if (minOffset < 0 || minOffset >= mText.length()) return false;
8303        if (maxOffset < 0 || maxOffset >= mText.length()) return false;
8304
8305        int selectionStart, selectionEnd;
8306
8307        // If a URLSpan (web address, email, phone...) is found at that position, select it.
8308        URLSpan[] urlSpans = ((Spanned) mText).getSpans(minOffset, maxOffset, URLSpan.class);
8309        if (urlSpans.length == 1) {
8310            URLSpan url = urlSpans[0];
8311            selectionStart = ((Spanned) mText).getSpanStart(url);
8312            selectionEnd = ((Spanned) mText).getSpanEnd(url);
8313        } else {
8314            if (mWordIterator == null) {
8315                mWordIterator = new WordIterator();
8316            }
8317            // WordIerator handles text changes, this is a no-op if text in unchanged.
8318            mWordIterator.setCharSequence(mText);
8319
8320            selectionStart = mWordIterator.getBeginning(minOffset);
8321            if (selectionStart == BreakIterator.DONE) return false;
8322
8323            selectionEnd = mWordIterator.getEnd(maxOffset);
8324            if (selectionEnd == BreakIterator.DONE) return false;
8325        }
8326
8327        Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
8328        return true;
8329    }
8330
8331    private long getLastTouchOffsets() {
8332        int minOffset, maxOffset;
8333
8334        if (mContextMenuTriggeredByKey) {
8335            minOffset = getSelectionStart();
8336            maxOffset = getSelectionEnd();
8337        } else {
8338            SelectionModifierCursorController selectionController = getSelectionController();
8339            minOffset = selectionController.getMinTouchOffset();
8340            maxOffset = selectionController.getMaxTouchOffset();
8341        }
8342
8343        return packRangeInLong(minOffset, maxOffset);
8344    }
8345
8346    @Override
8347    public void onPopulateAccessibilityEvent(AccessibilityEvent event) {
8348        super.onPopulateAccessibilityEvent(event);
8349
8350        final boolean isPassword = hasPasswordTransformationMethod();
8351        if (!isPassword) {
8352            CharSequence text = getText();
8353            if (TextUtils.isEmpty(text)) {
8354                text = getHint();
8355            }
8356            if (!TextUtils.isEmpty(text)) {
8357                event.getText().add(text);
8358            }
8359        }
8360    }
8361
8362    @Override
8363    public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
8364        super.onInitializeAccessibilityEvent(event);
8365
8366        final boolean isPassword = hasPasswordTransformationMethod();
8367        event.setPassword(isPassword);
8368
8369        if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED) {
8370            event.setFromIndex(Selection.getSelectionStart(mText));
8371            event.setToIndex(Selection.getSelectionEnd(mText));
8372            event.setItemCount(mText.length());
8373        }
8374    }
8375
8376    @Override
8377    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
8378        super.onInitializeAccessibilityNodeInfo(info);
8379
8380        final boolean isPassword = hasPasswordTransformationMethod();
8381        if (!isPassword) {
8382            info.setText(getText());
8383        }
8384        info.setPassword(isPassword);
8385    }
8386
8387    void sendAccessibilityEventTypeViewTextChanged(CharSequence beforeText,
8388            int fromIndex, int removedCount, int addedCount) {
8389        AccessibilityEvent event =
8390            AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
8391        event.setFromIndex(fromIndex);
8392        event.setRemovedCount(removedCount);
8393        event.setAddedCount(addedCount);
8394        event.setBeforeText(beforeText);
8395        sendAccessibilityEventUnchecked(event);
8396    }
8397
8398    @Override
8399    protected void onCreateContextMenu(ContextMenu menu) {
8400        super.onCreateContextMenu(menu);
8401        boolean added = false;
8402        mContextMenuTriggeredByKey = mDPadCenterIsDown || mEnterKeyIsDown;
8403        // Problem with context menu on long press: the menu appears while the key in down and when
8404        // the key is released, the view does not receive the key_up event.
8405        // We need two layers of flags: mDPadCenterIsDown and mEnterKeyIsDown are set in key down/up
8406        // events. We cannot simply clear these flags in onTextContextMenuItem since
8407        // it may not be called (if the user/ discards the context menu with the back key).
8408        // We clear these flags here and mContextMenuTriggeredByKey saves that state so that it is
8409        // available in onTextContextMenuItem.
8410        mDPadCenterIsDown = mEnterKeyIsDown = false;
8411
8412        MenuHandler handler = new MenuHandler();
8413
8414        if (mText instanceof Spanned && hasSelectionController()) {
8415            long lastTouchOffset = getLastTouchOffsets();
8416            final int selStart = extractRangeStartFromLong(lastTouchOffset);
8417            final int selEnd = extractRangeEndFromLong(lastTouchOffset);
8418
8419            URLSpan[] urls = ((Spanned) mText).getSpans(selStart, selEnd, URLSpan.class);
8420            if (urls.length > 0) {
8421                menu.add(0, ID_COPY_URL, 0, com.android.internal.R.string.copyUrl).
8422                        setOnMenuItemClickListener(handler);
8423
8424                added = true;
8425            }
8426        }
8427
8428        // The context menu is not empty, which will prevent the selection mode from starting.
8429        // Add a entry to start it in the context menu.
8430        // TODO Does not handle the case where a subclass does not call super.thisMethod or
8431        // populates the menu AFTER this call.
8432        if (menu.size() > 0) {
8433            menu.add(0, ID_SELECTION_MODE, 0, com.android.internal.R.string.selectTextMode).
8434                    setOnMenuItemClickListener(handler);
8435            added = true;
8436        }
8437
8438        if (added) {
8439            menu.setHeaderTitle(com.android.internal.R.string.editTextMenuTitle);
8440        }
8441    }
8442
8443    /**
8444     * Returns whether this text view is a current input method target.  The
8445     * default implementation just checks with {@link InputMethodManager}.
8446     */
8447    public boolean isInputMethodTarget() {
8448        InputMethodManager imm = InputMethodManager.peekInstance();
8449        return imm != null && imm.isActive(this);
8450    }
8451
8452    // Selection context mode
8453    private static final int ID_SELECT_ALL = android.R.id.selectAll;
8454    private static final int ID_CUT = android.R.id.cut;
8455    private static final int ID_COPY = android.R.id.copy;
8456    private static final int ID_PASTE = android.R.id.paste;
8457    // Context menu entries
8458    private static final int ID_COPY_URL = android.R.id.copyUrl;
8459    private static final int ID_SELECTION_MODE = android.R.id.selectTextMode;
8460
8461    private class MenuHandler implements MenuItem.OnMenuItemClickListener {
8462        public boolean onMenuItemClick(MenuItem item) {
8463            return onTextContextMenuItem(item.getItemId());
8464        }
8465    }
8466
8467    /**
8468     * Called when a context menu option for the text view is selected.  Currently
8469     * this will be {@link android.R.id#copyUrl}, {@link android.R.id#selectTextMode},
8470     * {@link android.R.id#selectAll}, {@link android.R.id#paste}, {@link android.R.id#cut}
8471     * or {@link android.R.id#copy}.
8472     *
8473     * @return true if the context menu item action was performed.
8474     */
8475    public boolean onTextContextMenuItem(int id) {
8476        int min = 0;
8477        int max = mText.length();
8478
8479        if (isFocused()) {
8480            final int selStart = getSelectionStart();
8481            final int selEnd = getSelectionEnd();
8482
8483            min = Math.max(0, Math.min(selStart, selEnd));
8484            max = Math.max(0, Math.max(selStart, selEnd));
8485        }
8486
8487        switch (id) {
8488            case ID_COPY_URL:
8489                URLSpan[] urls = ((Spanned) mText).getSpans(min, max, URLSpan.class);
8490                if (urls.length >= 1) {
8491                    ClipData clip = null;
8492                    for (int i=0; i<urls.length; i++) {
8493                        Uri uri = Uri.parse(urls[0].getURL());
8494                        if (clip == null) {
8495                            clip = ClipData.newRawUri(null, uri);
8496                        } else {
8497                            clip.addItem(new ClipData.Item(uri));
8498                        }
8499                    }
8500                    if (clip != null) {
8501                        setPrimaryClip(clip);
8502                    }
8503                }
8504                stopSelectionActionMode();
8505                return true;
8506
8507            case ID_SELECTION_MODE:
8508                if (mSelectionActionMode != null) {
8509                    // Selection mode is already started, simply change selected part.
8510                    selectCurrentWord();
8511                } else {
8512                    startSelectionActionMode();
8513                }
8514                return true;
8515
8516            case ID_SELECT_ALL:
8517                // This does not enter text selection mode. Text is highlighted, so that it can be
8518                // bulk edited, like selectAllOnFocus does. Returns true even if text is empty.
8519                selectAll();
8520                return true;
8521
8522            case ID_PASTE:
8523                paste(min, max);
8524                return true;
8525
8526            case ID_CUT:
8527                setPrimaryClip(ClipData.newPlainText(null, mTransformed.subSequence(min, max)));
8528                ((Editable) mText).delete(min, max);
8529                stopSelectionActionMode();
8530                return true;
8531
8532            case ID_COPY:
8533                setPrimaryClip(ClipData.newPlainText(null, mTransformed.subSequence(min, max)));
8534                stopSelectionActionMode();
8535                return true;
8536        }
8537        return false;
8538    }
8539
8540    /**
8541     * Prepare text so that there are not zero or two spaces at beginning and end of region defined
8542     * by [min, max] when replacing this region by paste.
8543     * Note that if there were two spaces (or more) at that position before, they are kept. We just
8544     * make sure we do not add an extra one from the paste content.
8545     */
8546    private long prepareSpacesAroundPaste(int min, int max, CharSequence paste) {
8547        if (paste.length() > 0) {
8548            if (min > 0) {
8549                final char charBefore = mTransformed.charAt(min - 1);
8550                final char charAfter = paste.charAt(0);
8551
8552                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
8553                    // Two spaces at beginning of paste: remove one
8554                    final int originalLength = mText.length();
8555                    ((Editable) mText).delete(min - 1, min);
8556                    // Due to filters, there is no guarantee that exactly one character was
8557                    // removed: count instead.
8558                    final int delta = mText.length() - originalLength;
8559                    min += delta;
8560                    max += delta;
8561                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
8562                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
8563                    // No space at beginning of paste: add one
8564                    final int originalLength = mText.length();
8565                    ((Editable) mText).replace(min, min, " ");
8566                    // Taking possible filters into account as above.
8567                    final int delta = mText.length() - originalLength;
8568                    min += delta;
8569                    max += delta;
8570                }
8571            }
8572
8573            if (max < mText.length()) {
8574                final char charBefore = paste.charAt(paste.length() - 1);
8575                final char charAfter = mTransformed.charAt(max);
8576
8577                if (Character.isSpaceChar(charBefore) && Character.isSpaceChar(charAfter)) {
8578                    // Two spaces at end of paste: remove one
8579                    ((Editable) mText).delete(max, max + 1);
8580                } else if (!Character.isSpaceChar(charBefore) && charBefore != '\n' &&
8581                        !Character.isSpaceChar(charAfter) && charAfter != '\n') {
8582                    // No space at end of paste: add one
8583                    ((Editable) mText).replace(max, max, " ");
8584                }
8585            }
8586        }
8587
8588        return packRangeInLong(min, max);
8589    }
8590
8591    private DragShadowBuilder getTextThumbnailBuilder(CharSequence text) {
8592        TextView shadowView = (TextView) inflate(mContext,
8593                com.android.internal.R.layout.text_drag_thumbnail, null);
8594
8595        if (shadowView == null) {
8596            throw new IllegalArgumentException("Unable to inflate text drag thumbnail");
8597        }
8598
8599        if (text.length() > DRAG_SHADOW_MAX_TEXT_LENGTH) {
8600            text = text.subSequence(0, DRAG_SHADOW_MAX_TEXT_LENGTH);
8601        }
8602        shadowView.setText(text);
8603        shadowView.setTextColor(getTextColors());
8604
8605        shadowView.setTextAppearance(mContext, R.styleable.Theme_textAppearanceLarge);
8606        shadowView.setGravity(Gravity.CENTER);
8607
8608        shadowView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
8609                ViewGroup.LayoutParams.WRAP_CONTENT));
8610
8611        final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
8612        shadowView.measure(size, size);
8613
8614        shadowView.layout(0, 0, shadowView.getMeasuredWidth(), shadowView.getMeasuredHeight());
8615        shadowView.invalidate();
8616        return new DragShadowBuilder(shadowView);
8617    }
8618
8619    private static class DragLocalState {
8620        public TextView sourceTextView;
8621        public int start, end;
8622
8623        public DragLocalState(TextView sourceTextView, int start, int end) {
8624            this.sourceTextView = sourceTextView;
8625            this.start = start;
8626            this.end = end;
8627        }
8628    }
8629
8630    @Override
8631    public boolean performLongClick() {
8632        if (super.performLongClick()) {
8633            mDiscardNextActionUp = true;
8634            return true;
8635        }
8636
8637        boolean handled = false;
8638
8639        // Long press in empty space moves cursor and shows the Paste affordance if available.
8640        if (!isPositionOnText(mLastDownPositionX, mLastDownPositionY) &&
8641                mInsertionControllerEnabled) {
8642            final int offset = getOffsetForPosition(mLastDownPositionX, mLastDownPositionY);
8643            stopSelectionActionMode();
8644            Selection.setSelection((Spannable) mText, offset);
8645            getInsertionController().showWithPaste();
8646            handled = true;
8647        }
8648
8649        if (!handled && mSelectionActionMode != null) {
8650            if (touchPositionIsInSelection()) {
8651                // Start a drag
8652                final int start = getSelectionStart();
8653                final int end = getSelectionEnd();
8654                CharSequence selectedText = mTransformed.subSequence(start, end);
8655                ClipData data = ClipData.newPlainText(null, selectedText);
8656                DragLocalState localState = new DragLocalState(this, start, end);
8657                startDrag(data, getTextThumbnailBuilder(selectedText), localState, 0);
8658                stopSelectionActionMode();
8659            } else {
8660                selectCurrentWord();
8661            }
8662            handled = true;
8663        }
8664
8665        // Start a new selection
8666        handled |= !handled && startSelectionActionMode();
8667
8668        if (handled) {
8669            performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
8670            mDiscardNextActionUp = true;
8671        }
8672
8673        return handled;
8674    }
8675
8676    private boolean touchPositionIsInSelection() {
8677        int selectionStart = getSelectionStart();
8678        int selectionEnd = getSelectionEnd();
8679
8680        if (selectionStart == selectionEnd) {
8681            return false;
8682        }
8683
8684        if (selectionStart > selectionEnd) {
8685            int tmp = selectionStart;
8686            selectionStart = selectionEnd;
8687            selectionEnd = tmp;
8688            Selection.setSelection((Spannable) mText, selectionStart, selectionEnd);
8689        }
8690
8691        SelectionModifierCursorController selectionController = getSelectionController();
8692        int minOffset = selectionController.getMinTouchOffset();
8693        int maxOffset = selectionController.getMaxTouchOffset();
8694
8695        return ((minOffset >= selectionStart) && (maxOffset < selectionEnd));
8696    }
8697
8698    private static class SuggestionRangeSpan extends UnderlineSpan {
8699        // TODO themable, would be nice to make it a child class of TextAppearanceSpan, but
8700        // there is no way to have underline and TextAppearanceSpan.
8701    }
8702
8703    private class SuggestionsPopupWindow implements OnClickListener {
8704        private static final int MAX_NUMBER_SUGGESTIONS = 5;
8705        private static final int NO_SUGGESTIONS = -1;
8706        private final PopupWindow mContainer;
8707        private final ViewGroup[] mSuggestionViews = new ViewGroup[2];
8708        private final int[] mSuggestionViewLayouts = new int[] {
8709                mTextEditSuggestionsBottomWindowLayout, mTextEditSuggestionsTopWindowLayout};
8710        private WordIterator mSuggestionWordIterator;
8711        private TextAppearanceSpan[] mHighlightSpans = new TextAppearanceSpan[0];
8712
8713        public SuggestionsPopupWindow() {
8714            mContainer = new PopupWindow(TextView.this.mContext, null,
8715                    com.android.internal.R.attr.textSuggestionsWindowStyle);
8716            mContainer.setSplitTouchEnabled(true);
8717            mContainer.setClippingEnabled(false);
8718            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
8719
8720            mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
8721            mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
8722        }
8723
8724        private class SuggestionInfo {
8725            int suggestionStart, suggestionEnd; // range of suggestion item with replacement text
8726            int spanStart, spanEnd; // range in TextView where text should be inserted
8727            SuggestionSpan suggestionSpan; // the SuggestionSpan that this TextView represents
8728            int suggestionIndex; // the index of the suggestion inside suggestionSpan
8729        }
8730
8731        private ViewGroup getViewGroup(boolean under) {
8732            final int viewIndex = under ? 0 : 1;
8733            ViewGroup viewGroup = mSuggestionViews[viewIndex];
8734
8735            if (viewGroup == null) {
8736                final int layout = mSuggestionViewLayouts[viewIndex];
8737                LayoutInflater inflater = (LayoutInflater) TextView.this.mContext.
8738                        getSystemService(Context.LAYOUT_INFLATER_SERVICE);
8739
8740                if (inflater == null) {
8741                    throw new IllegalArgumentException(
8742                            "Unable to create TextEdit suggestion window inflater");
8743                }
8744
8745                View view = inflater.inflate(layout, null);
8746
8747                if (! (view instanceof ViewGroup)) {
8748                    throw new IllegalArgumentException(
8749                            "Inflated TextEdit suggestion window is not a ViewGroup: " + view);
8750                }
8751
8752                viewGroup = (ViewGroup) view;
8753
8754                // Inflate the suggestion items once and for all.
8755                for (int i = 0; i < MAX_NUMBER_SUGGESTIONS; i++) {
8756                    View childView = inflater.inflate(mTextEditSuggestionItemLayout, viewGroup,
8757                            false);
8758
8759                    if (! (childView instanceof TextView)) {
8760                        throw new IllegalArgumentException(
8761                               "Inflated TextEdit suggestion item is not a TextView: " + childView);
8762                    }
8763
8764                    childView.setTag(new SuggestionInfo());
8765                    viewGroup.addView(childView);
8766                    childView.setOnClickListener(this);
8767                }
8768
8769                mSuggestionViews[viewIndex] = viewGroup;
8770            }
8771
8772            return viewGroup;
8773        }
8774
8775        public void show() {
8776            if (!(mText instanceof Editable)) return;
8777
8778            final int pos = TextView.this.getSelectionStart();
8779            Spannable spannable = (Spannable)TextView.this.mText;
8780            SuggestionSpan[] suggestionSpans = spannable.getSpans(pos, pos, SuggestionSpan.class);
8781            final int nbSpans = suggestionSpans.length;
8782
8783            ViewGroup viewGroup = getViewGroup(true);
8784            mContainer.setContentView(viewGroup);
8785
8786            int totalNbSuggestions = 0;
8787            int spanUnionStart = mText.length();
8788            int spanUnionEnd = 0;
8789
8790            for (int spanIndex = 0; spanIndex < nbSpans; spanIndex++) {
8791                SuggestionSpan suggestionSpan = suggestionSpans[spanIndex];
8792                final int spanStart = spannable.getSpanStart(suggestionSpan);
8793                final int spanEnd = spannable.getSpanEnd(suggestionSpan);
8794                spanUnionStart = Math.min(spanStart, spanUnionStart);
8795                spanUnionEnd = Math.max(spanEnd, spanUnionEnd);
8796
8797                String[] suggestions = suggestionSpan.getSuggestions();
8798                int nbSuggestions = suggestions.length;
8799                for (int suggestionIndex = 0; suggestionIndex < nbSuggestions; suggestionIndex++) {
8800                    TextView textView = (TextView) viewGroup.getChildAt(totalNbSuggestions);
8801                    textView.setText(suggestions[suggestionIndex]);
8802                    SuggestionInfo suggestionInfo = (SuggestionInfo) textView.getTag();
8803                    suggestionInfo.spanStart = spanStart;
8804                    suggestionInfo.spanEnd = spanEnd;
8805                    suggestionInfo.suggestionSpan = suggestionSpan;
8806                    suggestionInfo.suggestionIndex = suggestionIndex;
8807
8808                    totalNbSuggestions++;
8809                    if (totalNbSuggestions == MAX_NUMBER_SUGGESTIONS) {
8810                        // Also end outer for loop
8811                        spanIndex = nbSpans;
8812                        break;
8813                    }
8814                }
8815            }
8816
8817            if (totalNbSuggestions == 0) {
8818                // TODO Replace by final text, use a dedicated layout, add a fade out timer...
8819                TextView textView = (TextView) viewGroup.getChildAt(0);
8820                textView.setText("No suggestions available");
8821                SuggestionInfo suggestionInfo = (SuggestionInfo) textView.getTag();
8822                suggestionInfo.spanStart = NO_SUGGESTIONS;
8823                totalNbSuggestions++;
8824            } else {
8825                if (mSuggestionRangeSpan == null) mSuggestionRangeSpan = new SuggestionRangeSpan();
8826                ((Editable) mText).setSpan(mSuggestionRangeSpan, spanUnionStart, spanUnionEnd,
8827                        Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
8828
8829                for (int i = 0; i < totalNbSuggestions; i++) {
8830                    final TextView textView = (TextView) viewGroup.getChildAt(i);
8831                    highlightTextDifferences(textView, spanUnionStart, spanUnionEnd);
8832                }
8833            }
8834
8835            for (int i = 0; i < MAX_NUMBER_SUGGESTIONS; i++) {
8836                viewGroup.getChildAt(i).setVisibility(i < totalNbSuggestions ? VISIBLE : GONE);
8837            }
8838
8839            final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
8840            viewGroup.measure(size, size);
8841
8842            positionAtCursor();
8843        }
8844
8845        private long[] getWordLimits(CharSequence text) {
8846            // TODO locale for mSuggestionWordIterator
8847            if (mSuggestionWordIterator == null) mSuggestionWordIterator = new WordIterator();
8848            mSuggestionWordIterator.setCharSequence(text);
8849
8850            // First pass will simply count the number of words to be able to create an array
8851            // Not too expensive since previous break positions are cached by the BreakIterator
8852            int nbWords = 0;
8853            int position = mSuggestionWordIterator.following(0);
8854            while (position != BreakIterator.DONE) {
8855                nbWords++;
8856                position = mSuggestionWordIterator.following(position);
8857            }
8858
8859            int index = 0;
8860            long[] result = new long[nbWords];
8861
8862            position = mSuggestionWordIterator.following(0);
8863            while (position != BreakIterator.DONE) {
8864                int wordStart = mSuggestionWordIterator.getBeginning(position);
8865                result[index++] = packRangeInLong(wordStart, position);
8866                position = mSuggestionWordIterator.following(position);
8867            }
8868
8869            return result;
8870        }
8871
8872        private TextAppearanceSpan highlightSpan(int index) {
8873            final int length = mHighlightSpans.length;
8874            if (index < length) {
8875                return mHighlightSpans[index];
8876            }
8877
8878            // Assumes indexes are requested in sequence: simply append one more item
8879            TextAppearanceSpan[] newArray = new TextAppearanceSpan[length + 1];
8880            System.arraycopy(mHighlightSpans, 0, newArray, 0, length);
8881            TextAppearanceSpan highlightSpan = new TextAppearanceSpan(mContext,
8882                    android.R.style.TextAppearance_SuggestionHighlight);
8883            newArray[length] = highlightSpan;
8884            mHighlightSpans = newArray;
8885            return highlightSpan;
8886        }
8887
8888        private void highlightTextDifferences(TextView textView, int unionStart, int unionEnd) {
8889            SuggestionInfo suggestionInfo = (SuggestionInfo) textView.getTag();
8890            final int spanStart = suggestionInfo.spanStart;
8891            final int spanEnd = suggestionInfo.spanEnd;
8892
8893            // Remove all text formating by converting to Strings
8894            final String text = textView.getText().toString();
8895            final String sourceText = mText.subSequence(spanStart, spanEnd).toString();
8896
8897            long[] sourceWordLimits = getWordLimits(sourceText);
8898            long[] wordLimits = getWordLimits(text);
8899
8900            SpannableStringBuilder ssb = new SpannableStringBuilder();
8901            // span [spanStart, spanEnd] is included in union [spanUnionStart, int spanUnionEnd]
8902            // The final result is made of 3 parts: the text before, between and after the span
8903            // This is the text before, provided for context
8904            ssb.append(mText.subSequence(unionStart, spanStart).toString());
8905
8906            // shift is used to offset spans positions wrt span's beginning
8907            final int shift = spanStart - unionStart;
8908            suggestionInfo.suggestionStart = shift;
8909            suggestionInfo.suggestionEnd = shift + text.length();
8910
8911            // This is the actual suggestion text, which will be highlighted by the following code
8912            ssb.append(text);
8913
8914            String[] words = new String[wordLimits.length];
8915            for (int i = 0; i < wordLimits.length; i++) {
8916                int wordStart = extractRangeStartFromLong(wordLimits[i]);
8917                int wordEnd = extractRangeEndFromLong(wordLimits[i]);
8918                words[i] = text.substring(wordStart, wordEnd);
8919            }
8920
8921            // Highlighted word algorithm is based on word matching between source and text
8922            // Matching words are found from left to right. TODO: change for RTL languages
8923            // Characters between matching words are highlighted
8924            int previousCommonWordIndex = -1;
8925            int nbHighlightSpans = 0;
8926            for (int i = 0; i < sourceWordLimits.length; i++) {
8927                int wordStart = extractRangeStartFromLong(sourceWordLimits[i]);
8928                int wordEnd = extractRangeEndFromLong(sourceWordLimits[i]);
8929                String sourceWord = sourceText.substring(wordStart, wordEnd);
8930
8931                for (int j = previousCommonWordIndex + 1; j < words.length; j++) {
8932                    if (sourceWord.equals(words[j])) {
8933                        if (j != previousCommonWordIndex + 1) {
8934                            int firstDifferentPosition = previousCommonWordIndex < 0 ? 0 :
8935                                extractRangeEndFromLong(wordLimits[previousCommonWordIndex]);
8936                            int lastDifferentPosition = extractRangeStartFromLong(wordLimits[j]);
8937                            ssb.setSpan(highlightSpan(nbHighlightSpans++),
8938                                    shift + firstDifferentPosition, shift + lastDifferentPosition,
8939                                    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
8940                        } else {
8941                            // Compare characters between words
8942                            int previousSourceWordEnd = i == 0 ? 0 :
8943                                extractRangeEndFromLong(sourceWordLimits[i - 1]);
8944                            int sourceWordStart = extractRangeStartFromLong(sourceWordLimits[i]);
8945                            String sourceSpaces = sourceText.substring(previousSourceWordEnd,
8946                                    sourceWordStart);
8947
8948                            int previousWordEnd = j == 0 ? 0 :
8949                                extractRangeEndFromLong(wordLimits[j - 1]);
8950                            int currentWordStart = extractRangeStartFromLong(wordLimits[j]);
8951                            String textSpaces = text.substring(previousWordEnd, currentWordStart);
8952
8953                            if (!sourceSpaces.equals(textSpaces)) {
8954                                ssb.setSpan(highlightSpan(nbHighlightSpans++),
8955                                        shift + previousWordEnd, shift + currentWordStart,
8956                                        Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
8957                            }
8958                        }
8959                        previousCommonWordIndex = j;
8960                        break;
8961                    }
8962                }
8963            }
8964
8965            // Finally, compare ends of Strings
8966            if (previousCommonWordIndex < words.length - 1) {
8967                int firstDifferentPosition = previousCommonWordIndex < 0 ? 0 :
8968                    extractRangeEndFromLong(wordLimits[previousCommonWordIndex]);
8969                int lastDifferentPosition = textView.length();
8970                ssb.setSpan(highlightSpan(nbHighlightSpans++),
8971                        shift + firstDifferentPosition, shift + lastDifferentPosition,
8972                        Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
8973            } else {
8974                int lastSourceWordEnd = sourceWordLimits.length == 0 ? 0 :
8975                    extractRangeEndFromLong(sourceWordLimits[sourceWordLimits.length - 1]);
8976                String sourceSpaces = sourceText.substring(lastSourceWordEnd, sourceText.length());
8977
8978                int lastCommonTextWordEnd = previousCommonWordIndex < 0 ? 0 :
8979                    extractRangeEndFromLong(wordLimits[previousCommonWordIndex]);
8980                String textSpaces = text.substring(lastCommonTextWordEnd, textView.length());
8981
8982                if (!sourceSpaces.equals(textSpaces) && textSpaces.length() > 0) {
8983                    ssb.setSpan(highlightSpan(nbHighlightSpans++),
8984                            shift + lastCommonTextWordEnd, shift + textView.length(),
8985                            Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
8986                }
8987            }
8988
8989            // Final part, text after the current suggestion range.
8990            ssb.append(mText.subSequence(spanEnd, unionEnd).toString());
8991            textView.setText(ssb);
8992        }
8993
8994        public void hide() {
8995            if ((mText instanceof Editable) && mSuggestionRangeSpan != null) {
8996                ((Editable) mText).removeSpan(mSuggestionRangeSpan);
8997            }
8998            mContainer.dismiss();
8999        }
9000
9001        @Override
9002        public void onClick(View view) {
9003            if (view instanceof TextView) {
9004                TextView textView = (TextView) view;
9005                SuggestionInfo suggestionInfo = (SuggestionInfo) textView.getTag();
9006                final int spanStart = suggestionInfo.spanStart;
9007                final int spanEnd = suggestionInfo.spanEnd;
9008                if (spanStart != NO_SUGGESTIONS) {
9009                    // SuggestionSpans are removed by replace: save them before
9010                    Editable editable = ((Editable) mText);
9011                    SuggestionSpan[] suggestionSpans = editable.getSpans(spanStart, spanEnd,
9012                            SuggestionSpan.class);
9013                    final int length = suggestionSpans.length;
9014                    int[] suggestionSpansStarts = new int[length];
9015                    int[] suggestionSpansEnds = new int[length];
9016                    int[] suggestionSpansFlags = new int[length];
9017                    for (int i = 0; i < length; i++) {
9018                        final SuggestionSpan suggestionSpan = suggestionSpans[i];
9019                        suggestionSpansStarts[i] = editable.getSpanStart(suggestionSpan);
9020                        suggestionSpansEnds[i] = editable.getSpanEnd(suggestionSpan);
9021                        suggestionSpansFlags[i] = editable.getSpanFlags(suggestionSpan);
9022                    }
9023
9024                    final int suggestionStart = suggestionInfo.suggestionStart;
9025                    final int suggestionEnd = suggestionInfo.suggestionEnd;
9026                    final String suggestion = textView.getText().subSequence(
9027                            suggestionStart, suggestionEnd).toString();
9028                    final String originalText = mText.subSequence(spanStart, spanEnd).toString();
9029                    ((Editable) mText).replace(spanStart, spanEnd, suggestion);
9030
9031                    // Notify source IME of the suggestion pick. Do this before swaping texts.
9032                    if (!TextUtils.isEmpty(
9033                            suggestionInfo.suggestionSpan.getNotificationTargetClassName())) {
9034                        InputMethodManager imm = InputMethodManager.peekInstance();
9035                        imm.notifySuggestionPicked(suggestionInfo.suggestionSpan, originalText,
9036                                suggestionInfo.suggestionIndex);
9037                    }
9038
9039                    // Swap text content between actual text and Suggestion span
9040                    String[] suggestions = suggestionInfo.suggestionSpan.getSuggestions();
9041                    suggestions[suggestionInfo.suggestionIndex] = originalText;
9042
9043                    // Restore previous SuggestionSpans
9044                    final int lengthDifference = suggestion.length() - (spanEnd - spanStart);
9045                    for (int i = 0; i < length; i++) {
9046                        // Only spans that include the modified region make sense after replacement
9047                        // Spans partially included in the replaced region are removed, there is no
9048                        // way to assign them a valid range after replacement
9049                        if (suggestionSpansStarts[i] <= spanStart &&
9050                                suggestionSpansEnds[i] >= spanEnd) {
9051                            editable.setSpan(suggestionSpans[i], suggestionSpansStarts[i],
9052                                    suggestionSpansEnds[i] + lengthDifference,
9053                                    suggestionSpansFlags[i]);
9054                        }
9055                    }
9056                }
9057            }
9058            hide();
9059        }
9060
9061        void positionAtCursor() {
9062            View contentView = mContainer.getContentView();
9063            int width = contentView.getMeasuredWidth();
9064            int height = contentView.getMeasuredHeight();
9065            final int offset = TextView.this.getSelectionStart();
9066            final int line = mLayout.getLineForOffset(offset);
9067            final int lineBottom = mLayout.getLineBottom(line);
9068            float primaryHorizontal = mLayout.getPrimaryHorizontal(offset);
9069
9070            final Rect bounds = sCursorControllerTempRect;
9071            bounds.left = (int) (primaryHorizontal - width / 2.0f);
9072            bounds.top = lineBottom;
9073
9074            bounds.right = bounds.left + width;
9075            bounds.bottom = bounds.top + height;
9076
9077            convertFromViewportToContentCoordinates(bounds);
9078
9079            final int[] coords = mTempCoords;
9080            TextView.this.getLocationInWindow(coords);
9081            coords[0] += bounds.left;
9082            coords[1] += bounds.top;
9083
9084            final DisplayMetrics displayMetrics = mContext.getResources().getDisplayMetrics();
9085            final int screenHeight = displayMetrics.heightPixels;
9086
9087            // Vertical clipping
9088            if (coords[1] + height > screenHeight) {
9089                // Try to position above current line instead
9090                // TODO use top layout instead, reverse suggestion order,
9091                // try full screen vertical down if it still does not fit. TBD with designers.
9092
9093                // Update dimensions from new view
9094                contentView = mContainer.getContentView();
9095                width = contentView.getMeasuredWidth();
9096                height = contentView.getMeasuredHeight();
9097
9098                final int lineTop = mLayout.getLineTop(line);
9099                final int lineHeight = lineBottom - lineTop;
9100                coords[1] -= height + lineHeight;
9101            }
9102
9103            // Horizontal clipping
9104            coords[0] = Math.max(0, coords[0]);
9105            coords[0] = Math.min(displayMetrics.widthPixels - width, coords[0]);
9106
9107            mContainer.showAtLocation(TextView.this, Gravity.NO_GRAVITY, coords[0], coords[1]);
9108        }
9109    }
9110
9111    void showSuggestions() {
9112        if (!mSuggestionsEnabled || !isTextEditable()) return;
9113
9114        if (mSuggestionsPopupWindow == null) {
9115            mSuggestionsPopupWindow = new SuggestionsPopupWindow();
9116        }
9117        hideControllers();
9118        mSuggestionsPopupWindow.show();
9119    }
9120
9121    void hideSuggestions() {
9122        if (mSuggestionsPopupWindow != null) {
9123            mSuggestionsPopupWindow.hide();
9124        }
9125    }
9126
9127    /**
9128     * Some parts of the text can have alternate suggestion text attached. This is typically done by
9129     * the IME by adding {@link SuggestionSpan}s to the text.
9130     *
9131     * When suggestions are enabled (default), this list of suggestions will be displayed when the
9132     * user double taps on these parts of the text. No suggestions are displayed when this value is
9133     * false. Use {@link #setSuggestionsEnabled(boolean)} to change this value.
9134     *
9135     * @return true if the suggestions popup window is enabled.
9136     *
9137     * @attr ref android.R.styleable#TextView_suggestionsEnabled
9138     */
9139    public boolean isSuggestionsEnabled() {
9140        return mSuggestionsEnabled;
9141    }
9142
9143    /**
9144     * Enables or disables the suggestion popup. See {@link #isSuggestionsEnabled()}.
9145     *
9146     * @param enabled Whether or not suggestions are enabled.
9147     */
9148    public void setSuggestionsEnabled(boolean enabled) {
9149        mSuggestionsEnabled = enabled;
9150    }
9151
9152    /**
9153     * If provided, this ActionMode.Callback will be used to create the ActionMode when text
9154     * selection is initiated in this View.
9155     *
9156     * The standard implementation populates the menu with a subset of Select All, Cut, Copy and
9157     * Paste actions, depending on what this View supports.
9158     *
9159     * A custom implementation can add new entries in the default menu in its
9160     * {@link ActionMode.Callback#onPrepareActionMode(ActionMode, Menu)} method. The default actions
9161     * can also be removed from the menu using {@link Menu#removeItem(int)} and passing
9162     * {@link android.R.id#selectAll}, {@link android.R.id#cut}, {@link android.R.id#copy} or
9163     * {@link android.R.id#paste} ids as parameters.
9164     *
9165     * Returning false from {@link ActionMode.Callback#onCreateActionMode(ActionMode, Menu)} will
9166     * prevent the action mode from being started.
9167     *
9168     * Action click events should be handled by the custom implementation of
9169     * {@link ActionMode.Callback#onActionItemClicked(ActionMode, MenuItem)}.
9170     *
9171     * Note that text selection mode is not started when a TextView receives focus and the
9172     * {@link android.R.attr#selectAllOnFocus} flag has been set. The content is highlighted in
9173     * that case, to allow for quick replacement.
9174     */
9175    public void setCustomSelectionActionModeCallback(ActionMode.Callback actionModeCallback) {
9176        mCustomSelectionActionModeCallback = actionModeCallback;
9177    }
9178
9179    /**
9180     * Retrieves the value set in {@link #setCustomSelectionActionModeCallback}. Default is null.
9181     *
9182     * @return The current custom selection callback.
9183     */
9184    public ActionMode.Callback getCustomSelectionActionModeCallback() {
9185        return mCustomSelectionActionModeCallback;
9186    }
9187
9188    /**
9189     *
9190     * @return true if the selection mode was actually started.
9191     */
9192    private boolean startSelectionActionMode() {
9193        if (mSelectionActionMode != null) {
9194            // Selection action mode is already started
9195            return false;
9196        }
9197
9198        if (!canSelectText() || !requestFocus()) {
9199            Log.w(LOG_TAG, "TextView does not support text selection. Action mode cancelled.");
9200            return false;
9201        }
9202
9203        if (!hasSelection()) {
9204            // There may already be a selection on device rotation
9205            boolean currentWordSelected = selectCurrentWord();
9206            if (!currentWordSelected) {
9207                // No word found under cursor or text selection not permitted.
9208                return false;
9209            }
9210        }
9211
9212        ActionMode.Callback actionModeCallback = new SelectionActionModeCallback();
9213        mSelectionActionMode = startActionMode(actionModeCallback);
9214        final boolean selectionStarted = mSelectionActionMode != null;
9215
9216        if (selectionStarted && !mTextIsSelectable) {
9217            // Show the IME to be able to replace text, except when selecting non editable text.
9218            final InputMethodManager imm = InputMethodManager.peekInstance();
9219            if (imm != null) imm.showSoftInput(this, 0, null);
9220        }
9221
9222        return selectionStarted;
9223    }
9224
9225    private void stopSelectionActionMode() {
9226        if (mSelectionActionMode != null) {
9227            // This will hide the mSelectionModifierCursorController
9228            mSelectionActionMode.finish();
9229        }
9230    }
9231
9232    /**
9233     * Paste clipboard content between min and max positions.
9234     */
9235    private void paste(int min, int max) {
9236        ClipboardManager clipboard =
9237            (ClipboardManager) getContext().getSystemService(Context.CLIPBOARD_SERVICE);
9238        ClipData clip = clipboard.getPrimaryClip();
9239        if (clip != null) {
9240            boolean didFirst = false;
9241            for (int i=0; i<clip.getItemCount(); i++) {
9242                CharSequence paste = clip.getItemAt(i).coerceToText(getContext());
9243                if (paste != null) {
9244                    if (!didFirst) {
9245                        long minMax = prepareSpacesAroundPaste(min, max, paste);
9246                        min = extractRangeStartFromLong(minMax);
9247                        max = extractRangeEndFromLong(minMax);
9248                        Selection.setSelection((Spannable) mText, max);
9249                        ((Editable) mText).replace(min, max, paste);
9250                        didFirst = true;
9251                    } else {
9252                        ((Editable) mText).insert(getSelectionEnd(), "\n");
9253                        ((Editable) mText).insert(getSelectionEnd(), paste);
9254                    }
9255                }
9256            }
9257            stopSelectionActionMode();
9258            sLastCutOrCopyTime = 0;
9259        }
9260    }
9261
9262    private void setPrimaryClip(ClipData clip) {
9263        ClipboardManager clipboard = (ClipboardManager) getContext().
9264                getSystemService(Context.CLIPBOARD_SERVICE);
9265        clipboard.setPrimaryClip(clip);
9266        sLastCutOrCopyTime = SystemClock.uptimeMillis();
9267    }
9268
9269    /**
9270     * An ActionMode Callback class that is used to provide actions while in text selection mode.
9271     *
9272     * The default callback provides a subset of Select All, Cut, Copy and Paste actions, depending
9273     * on which of these this TextView supports.
9274     */
9275    private class SelectionActionModeCallback implements ActionMode.Callback {
9276
9277        @Override
9278        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
9279            TypedArray styledAttributes = mContext.obtainStyledAttributes(R.styleable.Theme);
9280
9281            boolean allowText = getContext().getResources().getBoolean(
9282                    com.android.internal.R.bool.config_allowActionMenuItemTextWithIcon);
9283
9284            mode.setTitle(allowText ?
9285                    mContext.getString(com.android.internal.R.string.textSelectionCABTitle) : null);
9286            mode.setSubtitle(null);
9287
9288            int selectAllIconId = 0; // No icon by default
9289            if (!allowText) {
9290                // Provide an icon, text will not be displayed on smaller screens.
9291                selectAllIconId = styledAttributes.getResourceId(
9292                        R.styleable.Theme_actionModeSelectAllDrawable, 0);
9293            }
9294
9295            menu.add(0, ID_SELECT_ALL, 0, com.android.internal.R.string.selectAll).
9296                    setIcon(selectAllIconId).
9297                    setAlphabeticShortcut('a').
9298                    setShowAsAction(
9299                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
9300
9301            if (canCut()) {
9302                menu.add(0, ID_CUT, 0, com.android.internal.R.string.cut).
9303                    setIcon(styledAttributes.getResourceId(
9304                            R.styleable.Theme_actionModeCutDrawable, 0)).
9305                    setAlphabeticShortcut('x').
9306                    setShowAsAction(
9307                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
9308            }
9309
9310            if (canCopy()) {
9311                menu.add(0, ID_COPY, 0, com.android.internal.R.string.copy).
9312                    setIcon(styledAttributes.getResourceId(
9313                            R.styleable.Theme_actionModeCopyDrawable, 0)).
9314                    setAlphabeticShortcut('c').
9315                    setShowAsAction(
9316                            MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
9317            }
9318
9319            if (canPaste()) {
9320                menu.add(0, ID_PASTE, 0, com.android.internal.R.string.paste).
9321                        setIcon(styledAttributes.getResourceId(
9322                                R.styleable.Theme_actionModePasteDrawable, 0)).
9323                        setAlphabeticShortcut('v').
9324                        setShowAsAction(
9325                                MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
9326            }
9327
9328            styledAttributes.recycle();
9329
9330            if (mCustomSelectionActionModeCallback != null) {
9331                if (!mCustomSelectionActionModeCallback.onCreateActionMode(mode, menu)) {
9332                    // The custom mode can choose to cancel the action mode
9333                    return false;
9334                }
9335            }
9336
9337            if (menu.hasVisibleItems() || mode.getCustomView() != null) {
9338                getSelectionController().show();
9339                return true;
9340            } else {
9341                return false;
9342            }
9343        }
9344
9345        @Override
9346        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
9347            if (mCustomSelectionActionModeCallback != null) {
9348                return mCustomSelectionActionModeCallback.onPrepareActionMode(mode, menu);
9349            }
9350            return true;
9351        }
9352
9353        @Override
9354        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
9355            if (mCustomSelectionActionModeCallback != null &&
9356                 mCustomSelectionActionModeCallback.onActionItemClicked(mode, item)) {
9357                return true;
9358            }
9359            return onTextContextMenuItem(item.getItemId());
9360        }
9361
9362        @Override
9363        public void onDestroyActionMode(ActionMode mode) {
9364            if (mCustomSelectionActionModeCallback != null) {
9365                mCustomSelectionActionModeCallback.onDestroyActionMode(mode);
9366            }
9367            Selection.setSelection((Spannable) mText, getSelectionEnd());
9368
9369            if (mSelectionModifierCursorController != null) {
9370                mSelectionModifierCursorController.hide();
9371            }
9372
9373            mSelectionActionMode = null;
9374        }
9375    }
9376
9377    private class PastePopupWindow implements OnClickListener {
9378        private final PopupWindow mContainer;
9379        private final View[] mPasteViews = new View[4];
9380        private final int[] mPasteViewLayouts = new int[] {
9381                mTextEditPasteWindowLayout,  mTextEditNoPasteWindowLayout,
9382                mTextEditSidePasteWindowLayout, mTextEditSideNoPasteWindowLayout };
9383
9384        public PastePopupWindow() {
9385            mContainer = new PopupWindow(TextView.this.mContext, null,
9386                    com.android.internal.R.attr.textSelectHandleWindowStyle);
9387            mContainer.setSplitTouchEnabled(true);
9388            mContainer.setClippingEnabled(false);
9389            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
9390
9391            mContainer.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
9392            mContainer.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
9393        }
9394
9395        private int viewIndex(boolean onTop) {
9396            return (onTop ? 0 : 1<<1) + (canPaste() ? 0 : 1<<0);
9397        }
9398
9399        private void updateContent(boolean onTop) {
9400            final int viewIndex = viewIndex(onTop);
9401            View view = mPasteViews[viewIndex];
9402
9403            if (view == null) {
9404                final int layout = mPasteViewLayouts[viewIndex];
9405                LayoutInflater inflater = (LayoutInflater)TextView.this.mContext.
9406                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
9407                if (inflater != null) {
9408                    view = inflater.inflate(layout, null);
9409                }
9410
9411                if (view == null) {
9412                    throw new IllegalArgumentException("Unable to inflate TextEdit paste window");
9413                }
9414
9415                final int size = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
9416                view.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
9417                        ViewGroup.LayoutParams.WRAP_CONTENT));
9418                view.measure(size, size);
9419
9420                view.setOnClickListener(this);
9421
9422                mPasteViews[viewIndex] = view;
9423            }
9424
9425            mContainer.setContentView(view);
9426        }
9427
9428        public void show() {
9429            updateContent(true);
9430            positionAtCursor();
9431        }
9432
9433        public void hide() {
9434            mContainer.dismiss();
9435        }
9436
9437        public boolean isShowing() {
9438            return mContainer.isShowing();
9439        }
9440
9441        @Override
9442        public void onClick(View v) {
9443            if (canPaste()) {
9444                paste(getSelectionStart(), getSelectionEnd());
9445            }
9446            hide();
9447        }
9448
9449        void positionAtCursor() {
9450            View contentView = mContainer.getContentView();
9451            int width = contentView.getMeasuredWidth();
9452            int height = contentView.getMeasuredHeight();
9453            final int offset = TextView.this.getSelectionStart();
9454            final int line = mLayout.getLineForOffset(offset);
9455            final int lineTop = mLayout.getLineTop(line);
9456            float primaryHorizontal = mLayout.getPrimaryHorizontal(offset);
9457
9458            final Rect bounds = sCursorControllerTempRect;
9459            bounds.left = (int) (primaryHorizontal - width / 2.0f);
9460            bounds.top = lineTop - height;
9461
9462            bounds.right = bounds.left + width;
9463            bounds.bottom = bounds.top + height;
9464
9465            convertFromViewportToContentCoordinates(bounds);
9466
9467            final int[] coords = mTempCoords;
9468            TextView.this.getLocationInWindow(coords);
9469            coords[0] += bounds.left;
9470            coords[1] += bounds.top;
9471
9472            final int screenWidth = mContext.getResources().getDisplayMetrics().widthPixels;
9473            if (coords[1] < 0) {
9474                updateContent(false);
9475                // Update dimensions from new view
9476                contentView = mContainer.getContentView();
9477                width = contentView.getMeasuredWidth();
9478                height = contentView.getMeasuredHeight();
9479
9480                // Vertical clipping, move under edited line and to the side of insertion cursor
9481                // TODO bottom clipping in case there is no system bar
9482                coords[1] += height;
9483                final int lineBottom = mLayout.getLineBottom(line);
9484                final int lineHeight = lineBottom - lineTop;
9485                coords[1] += lineHeight;
9486
9487                // Move to right hand side of insertion cursor by default. TODO RTL text.
9488                final Drawable handle = mContext.getResources().getDrawable(mTextSelectHandleRes);
9489                final int handleHalfWidth = handle.getIntrinsicWidth() / 2;
9490
9491                if (primaryHorizontal + handleHalfWidth + width < screenWidth) {
9492                    coords[0] += handleHalfWidth + width / 2;
9493                } else {
9494                    coords[0] -= handleHalfWidth + width / 2;
9495                }
9496            } else {
9497                // Horizontal clipping
9498                coords[0] = Math.max(0, coords[0]);
9499                coords[0] = Math.min(screenWidth - width, coords[0]);
9500            }
9501
9502            mContainer.showAtLocation(TextView.this, Gravity.NO_GRAVITY, coords[0], coords[1]);
9503        }
9504    }
9505
9506    private abstract class HandleView extends View implements ViewTreeObserver.OnPreDrawListener {
9507        protected Drawable mDrawable;
9508        private final PopupWindow mContainer;
9509        // Position with respect to the parent TextView
9510        private int mPositionX, mPositionY;
9511        private boolean mIsDragging;
9512        // Offset from touch position to mPosition
9513        private float mTouchToWindowOffsetX, mTouchToWindowOffsetY;
9514        protected float mHotspotX;
9515        // Offsets the hotspot point up, so that cursor is not hidden by the finger when moving up
9516        private float mTouchOffsetY;
9517        // Where the touch position should be on the handle to ensure a maximum cursor visibility
9518        private float mIdealVerticalOffset;
9519        // Parent's (TextView) previous position in window
9520        private int mLastParentX, mLastParentY;
9521        // PopupWindow container absolute position with respect to the enclosing window
9522        private int mContainerPositionX, mContainerPositionY;
9523        // Visible or not (scrolled off screen), whether or not this handle should be visible
9524        private boolean mIsActive = false;
9525        // Used to detect that setFrame was called
9526        private boolean mNeedsUpdate = true;
9527
9528        public HandleView() {
9529            super(TextView.this.mContext);
9530            mContainer = new PopupWindow(TextView.this.mContext, null,
9531                    com.android.internal.R.attr.textSelectHandleWindowStyle);
9532            mContainer.setSplitTouchEnabled(true);
9533            mContainer.setClippingEnabled(false);
9534            mContainer.setWindowLayoutType(WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL);
9535            mContainer.setContentView(this);
9536
9537            initDrawable();
9538
9539            final int handleHeight = mDrawable.getIntrinsicHeight();
9540            mTouchOffsetY = -0.3f * handleHeight;
9541            mIdealVerticalOffset = 0.7f * handleHeight;
9542        }
9543
9544        @Override
9545        protected boolean setFrame(int left, int top, int right, int bottom) {
9546            boolean changed = super.setFrame(left, top, right, bottom);
9547            // onPreDraw is called for PhoneWindow before the layout of this view is
9548            // performed. Make sure to update position, even if container didn't move.
9549            if (changed) mNeedsUpdate  = true;
9550            return changed;
9551        }
9552
9553        protected abstract void initDrawable();
9554
9555        // Touch-up filter: number of previous positions remembered
9556        private static final int HISTORY_SIZE = 5;
9557        private static final int TOUCH_UP_FILTER_DELAY_AFTER = 150;
9558        private static final int TOUCH_UP_FILTER_DELAY_BEFORE = 350;
9559        private final long[] mPreviousOffsetsTimes = new long[HISTORY_SIZE];
9560        private final int[] mPreviousOffsets = new int[HISTORY_SIZE];
9561        private int mPreviousOffsetIndex = 0;
9562        private int mNumberPreviousOffsets = 0;
9563
9564        private void startTouchUpFilter(int offset) {
9565            mNumberPreviousOffsets = 0;
9566            addPositionToTouchUpFilter(offset);
9567        }
9568
9569        private void addPositionToTouchUpFilter(int offset) {
9570            if (mNumberPreviousOffsets > 0 &&
9571                    mPreviousOffsets[mPreviousOffsetIndex] == offset) {
9572                // Make sure only actual changes of position are recorded.
9573                return;
9574            }
9575
9576            mPreviousOffsetIndex = (mPreviousOffsetIndex + 1) % HISTORY_SIZE;
9577            mPreviousOffsets[mPreviousOffsetIndex] = offset;
9578            mPreviousOffsetsTimes[mPreviousOffsetIndex] = SystemClock.uptimeMillis();
9579            mNumberPreviousOffsets++;
9580        }
9581
9582        private void filterOnTouchUp() {
9583            final long now = SystemClock.uptimeMillis();
9584            int i = 0;
9585            int index = mPreviousOffsetIndex;
9586            final int iMax = Math.min(mNumberPreviousOffsets, HISTORY_SIZE);
9587            while (i < iMax && (now - mPreviousOffsetsTimes[index]) < TOUCH_UP_FILTER_DELAY_AFTER) {
9588                i++;
9589                index = (mPreviousOffsetIndex - i + HISTORY_SIZE) % HISTORY_SIZE;
9590            }
9591
9592            if (i > 0 && i < iMax &&
9593                    (now - mPreviousOffsetsTimes[index]) > TOUCH_UP_FILTER_DELAY_BEFORE) {
9594                updateOffset(mPreviousOffsets[index]);
9595            }
9596        }
9597
9598        @Override
9599        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
9600            setMeasuredDimension(mDrawable.getIntrinsicWidth(), mDrawable.getIntrinsicHeight());
9601        }
9602
9603        public void show() {
9604            if (isShowing()) {
9605                mContainer.update(mContainerPositionX, mContainerPositionY,
9606                        mRight - mLeft, mBottom - mTop);
9607            } else {
9608                mContainer.showAtLocation(TextView.this, 0,
9609                        mContainerPositionX, mContainerPositionY);
9610
9611                mIsActive = true;
9612
9613                ViewTreeObserver vto = TextView.this.getViewTreeObserver();
9614                vto.addOnPreDrawListener(this);
9615            }
9616        }
9617
9618        protected void dismiss() {
9619            mIsDragging = false;
9620            mContainer.dismiss();
9621        }
9622
9623        public void hide() {
9624            dismiss();
9625
9626            mIsActive = false;
9627
9628            ViewTreeObserver vto = TextView.this.getViewTreeObserver();
9629            vto.removeOnPreDrawListener(this);
9630        }
9631
9632        public boolean isShowing() {
9633            return mContainer.isShowing();
9634        }
9635
9636        private boolean isPositionVisible() {
9637            // Always show a dragging handle.
9638            if (mIsDragging) {
9639                return true;
9640            }
9641
9642            if (isInBatchEditMode()) {
9643                return false;
9644            }
9645
9646            final int extendedPaddingTop = getExtendedPaddingTop();
9647            final int extendedPaddingBottom = getExtendedPaddingBottom();
9648            final int compoundPaddingLeft = getCompoundPaddingLeft();
9649            final int compoundPaddingRight = getCompoundPaddingRight();
9650
9651            final TextView textView = TextView.this;
9652
9653            if (mTempRect == null) mTempRect = new Rect();
9654            final Rect clip = mTempRect;
9655            clip.left = compoundPaddingLeft;
9656            clip.top = extendedPaddingTop;
9657            clip.right = textView.getWidth() - compoundPaddingRight;
9658            clip.bottom = textView.getHeight() - extendedPaddingBottom;
9659
9660            final ViewParent parent = textView.getParent();
9661            if (parent == null || !parent.getChildVisibleRect(textView, clip, null)) {
9662                return false;
9663            }
9664
9665            final int[] coords = mTempCoords;
9666            textView.getLocationInWindow(coords);
9667            final int posX = coords[0] + mPositionX + (int) mHotspotX;
9668            final int posY = coords[1] + mPositionY;
9669
9670            // Offset by 1 to take into account 0.5 and int rounding around getPrimaryHorizontal.
9671            return posX >= clip.left - 1 && posX <= clip.right + 1 &&
9672                    posY >= clip.top && posY <= clip.bottom;
9673        }
9674
9675        public abstract int getCurrentCursorOffset();
9676
9677        public abstract void updateOffset(int offset);
9678
9679        public abstract void updatePosition(float x, float y);
9680
9681        protected void positionAtCursorOffset(int offset) {
9682            // A HandleView relies on the layout, which may be nulled by external methods.
9683            if (mLayout == null) {
9684                // Will update controllers' state, hiding them and stopping selection mode if needed
9685                prepareCursorControllers();
9686                return;
9687            }
9688
9689            addPositionToTouchUpFilter(offset);
9690            final int line = mLayout.getLineForOffset(offset);
9691            final int lineBottom = mLayout.getLineBottom(line);
9692
9693            mPositionX = (int) (mLayout.getPrimaryHorizontal(offset) - 0.5f - mHotspotX);
9694            mPositionY = lineBottom;
9695
9696            // Take TextView's padding into account.
9697            mPositionX += viewportToContentHorizontalOffset();
9698            mPositionY += viewportToContentVerticalOffset();
9699        }
9700
9701        private void checkForContainerPositionChange() {
9702            positionAtCursorOffset(getCurrentCursorOffset());
9703
9704            final int previousContainerPositionX = mContainerPositionX;
9705            final int previousContainerPositionY = mContainerPositionY;
9706
9707            TextView.this.getLocationInWindow(mTempCoords);
9708            mContainerPositionX = mTempCoords[0] + mPositionX;
9709            mContainerPositionY = mTempCoords[1] + mPositionY;
9710
9711            mNeedsUpdate |= previousContainerPositionX != mContainerPositionX;
9712            mNeedsUpdate |= previousContainerPositionY != mContainerPositionY;
9713        }
9714
9715        public boolean onPreDraw() {
9716            checkForContainerPositionChange();
9717            if (mNeedsUpdate) {
9718                if (mIsDragging) {
9719                    if (mTempCoords[0] != mLastParentX || mTempCoords[1] != mLastParentY) {
9720                        mTouchToWindowOffsetX += mTempCoords[0] - mLastParentX;
9721                        mTouchToWindowOffsetY += mTempCoords[1] - mLastParentY;
9722                        mLastParentX = mTempCoords[0];
9723                        mLastParentY = mTempCoords[1];
9724                    }
9725                }
9726
9727                onHandleMoved();
9728
9729                if (isPositionVisible()) {
9730                    mContainer.update(mContainerPositionX, mContainerPositionY,
9731                            mRight - mLeft, mBottom - mTop);
9732
9733                    if (mIsActive && !isShowing()) {
9734                        show();
9735                    }
9736                } else {
9737                    if (isShowing()) {
9738                        dismiss();
9739                    }
9740                }
9741                mNeedsUpdate = false;
9742            }
9743            return true;
9744        }
9745
9746        @Override
9747        protected void onDraw(Canvas c) {
9748            mDrawable.setBounds(0, 0, mRight - mLeft, mBottom - mTop);
9749            mDrawable.draw(c);
9750        }
9751
9752        @Override
9753        public boolean onTouchEvent(MotionEvent ev) {
9754            switch (ev.getActionMasked()) {
9755                case MotionEvent.ACTION_DOWN: {
9756                    startTouchUpFilter(getCurrentCursorOffset());
9757                    mTouchToWindowOffsetX = ev.getRawX() - mPositionX;
9758                    mTouchToWindowOffsetY = ev.getRawY() - mPositionY;
9759
9760                    final int[] coords = mTempCoords;
9761                    TextView.this.getLocationInWindow(coords);
9762                    mLastParentX = coords[0];
9763                    mLastParentY = coords[1];
9764                    mIsDragging = true;
9765                    break;
9766                }
9767
9768                case MotionEvent.ACTION_MOVE: {
9769                    final float rawX = ev.getRawX();
9770                    final float rawY = ev.getRawY();
9771
9772                    // Vertical hysteresis: vertical down movement tends to snap to ideal offset
9773                    final float previousVerticalOffset = mTouchToWindowOffsetY - mLastParentY;
9774                    final float currentVerticalOffset = rawY - mPositionY - mLastParentY;
9775                    float newVerticalOffset;
9776                    if (previousVerticalOffset < mIdealVerticalOffset) {
9777                        newVerticalOffset = Math.min(currentVerticalOffset, mIdealVerticalOffset);
9778                        newVerticalOffset = Math.max(newVerticalOffset, previousVerticalOffset);
9779                    } else {
9780                        newVerticalOffset = Math.max(currentVerticalOffset, mIdealVerticalOffset);
9781                        newVerticalOffset = Math.min(newVerticalOffset, previousVerticalOffset);
9782                    }
9783                    mTouchToWindowOffsetY = newVerticalOffset + mLastParentY;
9784
9785                    final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX;
9786                    final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY;
9787
9788                    updatePosition(newPosX, newPosY);
9789                    break;
9790                }
9791
9792                case MotionEvent.ACTION_UP:
9793                    filterOnTouchUp();
9794                    mIsDragging = false;
9795                    break;
9796
9797                case MotionEvent.ACTION_CANCEL:
9798                    mIsDragging = false;
9799                    break;
9800            }
9801            return true;
9802        }
9803
9804        public boolean isDragging() {
9805            return mIsDragging;
9806        }
9807
9808        void onHandleMoved() {
9809            // Does nothing by default
9810        }
9811
9812        public void onDetached() {
9813            // Should be overriden to clean possible Runnable
9814        }
9815    }
9816
9817    private class InsertionHandleView extends HandleView {
9818        private static final int DELAY_BEFORE_FADE_OUT = 4000;
9819        private static final int RECENT_CUT_COPY_DURATION = 15 * 1000; // seconds
9820
9821        // Used to detect taps on the insertion handle, which will affect the PastePopupWindow
9822        private float mDownPositionX, mDownPositionY;
9823        private PastePopupWindow mPastePopupWindow;
9824        private Runnable mHider;
9825        private Runnable mPastePopupShower;
9826
9827        @Override
9828        public void show() {
9829            super.show();
9830            hideDelayed();
9831            hidePastePopupWindow();
9832        }
9833
9834        public void show(int delayBeforePaste) {
9835            show();
9836
9837            final long durationSinceCutOrCopy = SystemClock.uptimeMillis() - sLastCutOrCopyTime;
9838            if (durationSinceCutOrCopy < RECENT_CUT_COPY_DURATION) {
9839                delayBeforePaste = 0;
9840            }
9841            if (delayBeforePaste == 0 || canPaste()) {
9842                if (mPastePopupShower == null) {
9843                    mPastePopupShower = new Runnable() {
9844                        public void run() {
9845                            showPastePopupWindow();
9846                        }
9847                    };
9848                }
9849                TextView.this.postDelayed(mPastePopupShower, delayBeforePaste);
9850            }
9851        }
9852
9853        @Override
9854        protected void dismiss() {
9855            super.dismiss();
9856            onDetached();
9857        }
9858
9859        private void hideDelayed() {
9860            removeHiderCallback();
9861            if (mHider == null) {
9862                mHider = new Runnable() {
9863                    public void run() {
9864                        hide();
9865                    }
9866                };
9867            }
9868            TextView.this.postDelayed(mHider, DELAY_BEFORE_FADE_OUT);
9869        }
9870
9871        private void removeHiderCallback() {
9872            if (mHider != null) {
9873                TextView.this.removeCallbacks(mHider);
9874            }
9875        }
9876
9877        @Override
9878        protected void initDrawable() {
9879            if (mSelectHandleCenter == null) {
9880                mSelectHandleCenter = mContext.getResources().getDrawable(
9881                        mTextSelectHandleRes);
9882            }
9883            mDrawable = mSelectHandleCenter;
9884            mHotspotX = mDrawable.getIntrinsicWidth() / 2.0f;
9885        }
9886
9887        @Override
9888        public boolean onTouchEvent(MotionEvent ev) {
9889            final boolean result = super.onTouchEvent(ev);
9890
9891            switch (ev.getActionMasked()) {
9892                case MotionEvent.ACTION_DOWN:
9893                    mDownPositionX = ev.getRawX();
9894                    mDownPositionY = ev.getRawY();
9895                    break;
9896
9897                case MotionEvent.ACTION_UP:
9898                    final float deltaX = mDownPositionX - ev.getRawX();
9899                    final float deltaY = mDownPositionY - ev.getRawY();
9900                    final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
9901                    if (distanceSquared < mSquaredTouchSlopDistance) {
9902                        if (mPastePopupWindow != null && mPastePopupWindow.isShowing()) {
9903                            // Tapping on the handle dismisses the displayed paste view,
9904                            mPastePopupWindow.hide();
9905                        } else {
9906                            show(0);
9907                        }
9908                    }
9909                    hideDelayed();
9910                    break;
9911
9912                case MotionEvent.ACTION_CANCEL:
9913                    hideDelayed();
9914                    break;
9915
9916                default:
9917                    break;
9918            }
9919
9920            return result;
9921        }
9922
9923        @Override
9924        public int getCurrentCursorOffset() {
9925            return TextView.this.getSelectionStart();
9926        }
9927
9928        @Override
9929        public void updateOffset(int offset) {
9930            Selection.setSelection((Spannable) mText, offset);
9931        }
9932
9933        @Override
9934        public void updatePosition(float x, float y) {
9935            updateOffset(getOffsetForPosition(x, y));
9936        }
9937
9938        void showPastePopupWindow() {
9939            if (mPastePopupWindow == null) {
9940                mPastePopupWindow = new PastePopupWindow();
9941            }
9942            mPastePopupWindow.show();
9943        }
9944
9945        @Override
9946        void onHandleMoved() {
9947            removeHiderCallback();
9948            hidePastePopupWindow();
9949        }
9950
9951        void hidePastePopupWindow() {
9952            if (mPastePopupShower != null) {
9953                TextView.this.removeCallbacks(mPastePopupShower);
9954            }
9955            if (mPastePopupWindow != null) {
9956                mPastePopupWindow.hide();
9957            }
9958        }
9959
9960        @Override
9961        public void onDetached() {
9962            removeHiderCallback();
9963            hidePastePopupWindow();
9964        }
9965    }
9966
9967    private class SelectionStartHandleView extends HandleView {
9968        @Override
9969        protected void initDrawable() {
9970            if (mSelectHandleLeft == null) {
9971                mSelectHandleLeft = mContext.getResources().getDrawable(
9972                        mTextSelectHandleLeftRes);
9973            }
9974            mDrawable = mSelectHandleLeft;
9975            mHotspotX = mDrawable.getIntrinsicWidth() * 3.0f / 4.0f;
9976        }
9977
9978        @Override
9979        public int getCurrentCursorOffset() {
9980            return TextView.this.getSelectionStart();
9981        }
9982
9983        @Override
9984        public void updateOffset(int offset) {
9985            Selection.setSelection((Spannable) mText, offset, getSelectionEnd());
9986        }
9987
9988        @Override
9989        public void updatePosition(float x, float y) {
9990            final int selectionStart = getSelectionStart();
9991            final int selectionEnd = getSelectionEnd();
9992
9993            int offset = getOffsetForPosition(x, y);
9994
9995            // No need to redraw when the offset is unchanged
9996            if (offset == selectionStart) return;
9997            // Handles can not cross and selection is at least one character
9998            if (offset >= selectionEnd) offset = selectionEnd - 1;
9999
10000            Selection.setSelection((Spannable) mText, offset, selectionEnd);
10001        }
10002    }
10003
10004    private class SelectionEndHandleView extends HandleView {
10005        @Override
10006        protected void initDrawable() {
10007            if (mSelectHandleRight == null) {
10008                mSelectHandleRight = mContext.getResources().getDrawable(
10009                        mTextSelectHandleRightRes);
10010            }
10011            mDrawable = mSelectHandleRight;
10012            mHotspotX = mDrawable.getIntrinsicWidth() / 4.0f;
10013        }
10014
10015        @Override
10016        public int getCurrentCursorOffset() {
10017            return TextView.this.getSelectionEnd();
10018        }
10019
10020        @Override
10021        public void updateOffset(int offset) {
10022            Selection.setSelection((Spannable) mText, getSelectionStart(), offset);
10023        }
10024
10025        @Override
10026        public void updatePosition(float x, float y) {
10027            final int selectionStart = getSelectionStart();
10028            final int selectionEnd = getSelectionEnd();
10029
10030            int offset = getOffsetForPosition(x, y);
10031
10032            // No need to redraw when the offset is unchanged
10033            if (offset == selectionEnd) return;
10034            // Handles can not cross and selection is at least one character
10035            if (offset <= selectionStart) offset = selectionStart + 1;
10036
10037            Selection.setSelection((Spannable) mText, selectionStart, offset);
10038        }
10039    }
10040
10041    /**
10042     * A CursorController instance can be used to control a cursor in the text.
10043     * It is not used outside of {@link TextView}.
10044     * @hide
10045     */
10046    private interface CursorController extends ViewTreeObserver.OnTouchModeChangeListener {
10047        /**
10048         * Makes the cursor controller visible on screen. Will be drawn by {@link #draw(Canvas)}.
10049         * See also {@link #hide()}.
10050         */
10051        public void show();
10052
10053        /**
10054         * Hide the cursor controller from screen.
10055         * See also {@link #show()}.
10056         */
10057        public void hide();
10058
10059        /**
10060         * Called when the view is detached from window. Perform house keeping task, such as
10061         * stopping Runnable thread that would otherwise keep a reference on the context, thus
10062         * preventing the activity from being recycled.
10063         */
10064        public void onDetached();
10065    }
10066
10067    private class InsertionPointCursorController implements CursorController {
10068        private static final int DELAY_BEFORE_PASTE = 2000;
10069
10070        private InsertionHandleView mHandle;
10071
10072        public void show() {
10073            ((InsertionHandleView) getHandle()).show(DELAY_BEFORE_PASTE);
10074        }
10075
10076        public void showWithPaste() {
10077            ((InsertionHandleView) getHandle()).show(0);
10078        }
10079
10080        public void hide() {
10081            if (mHandle != null) {
10082                mHandle.hide();
10083            }
10084        }
10085
10086        public void onTouchModeChanged(boolean isInTouchMode) {
10087            if (!isInTouchMode) {
10088                hide();
10089            }
10090        }
10091
10092        private HandleView getHandle() {
10093            if (mHandle == null) {
10094                mHandle = new InsertionHandleView();
10095            }
10096            return mHandle;
10097        }
10098
10099        @Override
10100        public void onDetached() {
10101            final ViewTreeObserver observer = getViewTreeObserver();
10102            observer.removeOnTouchModeChangeListener(this);
10103
10104            if (mHandle != null) mHandle.onDetached();
10105        }
10106    }
10107
10108    private class SelectionModifierCursorController implements CursorController {
10109        // The cursor controller handles, lazily created when shown.
10110        private SelectionStartHandleView mStartHandle;
10111        private SelectionEndHandleView mEndHandle;
10112        // The offsets of that last touch down event. Remembered to start selection there.
10113        private int mMinTouchOffset, mMaxTouchOffset;
10114
10115        // Double tap detection
10116        private long mPreviousTapUpTime = 0;
10117        private float mPreviousTapPositionX, mPreviousTapPositionY;
10118
10119        SelectionModifierCursorController() {
10120            resetTouchOffsets();
10121        }
10122
10123        public void show() {
10124            if (isInBatchEditMode()) {
10125                return;
10126            }
10127
10128            // Lazy object creation has to be done before updatePosition() is called.
10129            if (mStartHandle == null) mStartHandle = new SelectionStartHandleView();
10130            if (mEndHandle == null) mEndHandle = new SelectionEndHandleView();
10131
10132            mStartHandle.show();
10133            mEndHandle.show();
10134
10135            hideInsertionPointCursorController();
10136            hideSuggestions();
10137        }
10138
10139        public void hide() {
10140            if (mStartHandle != null) mStartHandle.hide();
10141            if (mEndHandle != null) mEndHandle.hide();
10142        }
10143
10144        public void onTouchEvent(MotionEvent event) {
10145            // This is done even when the View does not have focus, so that long presses can start
10146            // selection and tap can move cursor from this tap position.
10147            switch (event.getActionMasked()) {
10148                case MotionEvent.ACTION_DOWN:
10149                    final float x = event.getX();
10150                    final float y = event.getY();
10151
10152                    // Remember finger down position, to be able to start selection from there
10153                    mMinTouchOffset = mMaxTouchOffset = getOffsetForPosition(x, y);
10154
10155                    // Double tap detection
10156                    long duration = SystemClock.uptimeMillis() - mPreviousTapUpTime;
10157                    if (duration <= ViewConfiguration.getDoubleTapTimeout() &&
10158                            isPositionOnText(x, y)) {
10159                        final float deltaX = x - mPreviousTapPositionX;
10160                        final float deltaY = y - mPreviousTapPositionY;
10161                        final float distanceSquared = deltaX * deltaX + deltaY * deltaY;
10162                        if (distanceSquared < mSquaredTouchSlopDistance) {
10163                            showSuggestions();
10164                            mDiscardNextActionUp = true;
10165                        }
10166                    }
10167
10168                    mPreviousTapPositionX = x;
10169                    mPreviousTapPositionY = y;
10170
10171                    break;
10172
10173                case MotionEvent.ACTION_POINTER_DOWN:
10174                case MotionEvent.ACTION_POINTER_UP:
10175                    // Handle multi-point gestures. Keep min and max offset positions.
10176                    // Only activated for devices that correctly handle multi-touch.
10177                    if (mContext.getPackageManager().hasSystemFeature(
10178                            PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT)) {
10179                        updateMinAndMaxOffsets(event);
10180                    }
10181                    break;
10182
10183                case MotionEvent.ACTION_UP:
10184                    mPreviousTapUpTime = SystemClock.uptimeMillis();
10185                    break;
10186            }
10187        }
10188
10189        /**
10190         * @param event
10191         */
10192        private void updateMinAndMaxOffsets(MotionEvent event) {
10193            int pointerCount = event.getPointerCount();
10194            for (int index = 0; index < pointerCount; index++) {
10195                int offset = getOffsetForPosition(event.getX(index), event.getY(index));
10196                if (offset < mMinTouchOffset) mMinTouchOffset = offset;
10197                if (offset > mMaxTouchOffset) mMaxTouchOffset = offset;
10198            }
10199        }
10200
10201        public int getMinTouchOffset() {
10202            return mMinTouchOffset;
10203        }
10204
10205        public int getMaxTouchOffset() {
10206            return mMaxTouchOffset;
10207        }
10208
10209        public void resetTouchOffsets() {
10210            mMinTouchOffset = mMaxTouchOffset = -1;
10211        }
10212
10213        /**
10214         * @return true iff this controller is currently used to move the selection start.
10215         */
10216        public boolean isSelectionStartDragged() {
10217            return mStartHandle != null && mStartHandle.isDragging();
10218        }
10219
10220        public void onTouchModeChanged(boolean isInTouchMode) {
10221            if (!isInTouchMode) {
10222                hide();
10223            }
10224        }
10225
10226        @Override
10227        public void onDetached() {
10228            final ViewTreeObserver observer = getViewTreeObserver();
10229            observer.removeOnTouchModeChangeListener(this);
10230
10231            if (mStartHandle != null) mStartHandle.onDetached();
10232            if (mEndHandle != null) mEndHandle.onDetached();
10233        }
10234    }
10235
10236    private void hideInsertionPointCursorController() {
10237        // No need to create the controller to hide it.
10238        if (mInsertionPointCursorController != null) {
10239            mInsertionPointCursorController.hide();
10240        }
10241    }
10242
10243    /**
10244     * Hides the insertion controller and stops text selection mode, hiding the selection controller
10245     */
10246    private void hideControllers() {
10247        hideInsertionPointCursorController();
10248        stopSelectionActionMode();
10249        hideSuggestions();
10250    }
10251
10252    /**
10253     * Get the character offset closest to the specified absolute position. A typical use case is to
10254     * pass the result of {@link MotionEvent#getX()} and {@link MotionEvent#getY()} to this method.
10255     *
10256     * @param x The horizontal absolute position of a point on screen
10257     * @param y The vertical absolute position of a point on screen
10258     * @return the character offset for the character whose position is closest to the specified
10259     *  position. Returns -1 if there is no layout.
10260     */
10261    public int getOffsetForPosition(float x, float y) {
10262        if (getLayout() == null) return -1;
10263        final int line = getLineAtCoordinate(y);
10264        final int offset = getOffsetAtCoordinate(line, x);
10265        return offset;
10266    }
10267
10268    private float convertToLocalHorizontalCoordinate(float x) {
10269        x -= getTotalPaddingLeft();
10270        // Clamp the position to inside of the view.
10271        x = Math.max(0.0f, x);
10272        x = Math.min(getWidth() - getTotalPaddingRight() - 1, x);
10273        x += getScrollX();
10274        return x;
10275    }
10276
10277    private int getLineAtCoordinate(float y) {
10278        y -= getTotalPaddingTop();
10279        // Clamp the position to inside of the view.
10280        y = Math.max(0.0f, y);
10281        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
10282        y += getScrollY();
10283        return getLayout().getLineForVertical((int) y);
10284    }
10285
10286    private int getOffsetAtCoordinate(int line, float x) {
10287        x = convertToLocalHorizontalCoordinate(x);
10288        return getLayout().getOffsetForHorizontal(line, x);
10289    }
10290
10291    /** Returns true if the screen coordinates position (x,y) corresponds to a character displayed
10292     * in the view. Returns false when the position is in the empty space of left/right of text.
10293     */
10294    private boolean isPositionOnText(float x, float y) {
10295        if (getLayout() == null) return false;
10296
10297        final int line = getLineAtCoordinate(y);
10298        x = convertToLocalHorizontalCoordinate(x);
10299
10300        if (x < getLayout().getLineLeft(line)) return false;
10301        if (x > getLayout().getLineRight(line)) return false;
10302        return true;
10303    }
10304
10305    @Override
10306    public boolean onDragEvent(DragEvent event) {
10307        switch (event.getAction()) {
10308            case DragEvent.ACTION_DRAG_STARTED:
10309                return hasInsertionController();
10310
10311            case DragEvent.ACTION_DRAG_ENTERED:
10312                TextView.this.requestFocus();
10313                return true;
10314
10315            case DragEvent.ACTION_DRAG_LOCATION:
10316                final int offset = getOffsetForPosition(event.getX(), event.getY());
10317                Selection.setSelection((Spannable)mText, offset);
10318                return true;
10319
10320            case DragEvent.ACTION_DROP:
10321                onDrop(event);
10322                return true;
10323
10324            case DragEvent.ACTION_DRAG_ENDED:
10325            case DragEvent.ACTION_DRAG_EXITED:
10326            default:
10327                return true;
10328        }
10329    }
10330
10331    private void onDrop(DragEvent event) {
10332        StringBuilder content = new StringBuilder("");
10333        ClipData clipData = event.getClipData();
10334        final int itemCount = clipData.getItemCount();
10335        for (int i=0; i < itemCount; i++) {
10336            Item item = clipData.getItemAt(i);
10337            content.append(item.coerceToText(TextView.this.mContext));
10338        }
10339
10340        final int offset = getOffsetForPosition(event.getX(), event.getY());
10341
10342        Object localState = event.getLocalState();
10343        DragLocalState dragLocalState = null;
10344        if (localState instanceof DragLocalState) {
10345            dragLocalState = (DragLocalState) localState;
10346        }
10347        boolean dragDropIntoItself = dragLocalState != null &&
10348                dragLocalState.sourceTextView == this;
10349
10350        if (dragDropIntoItself) {
10351            if (offset >= dragLocalState.start && offset < dragLocalState.end) {
10352                // A drop inside the original selection discards the drop.
10353                return;
10354            }
10355        }
10356
10357        final int originalLength = mText.length();
10358        long minMax = prepareSpacesAroundPaste(offset, offset, content);
10359        int min = extractRangeStartFromLong(minMax);
10360        int max = extractRangeEndFromLong(minMax);
10361
10362        Selection.setSelection((Spannable) mText, max);
10363        ((Editable) mText).replace(min, max, content);
10364
10365        if (dragDropIntoItself) {
10366            int dragSourceStart = dragLocalState.start;
10367            int dragSourceEnd = dragLocalState.end;
10368            if (max <= dragSourceStart) {
10369                // Inserting text before selection has shifted positions
10370                final int shift = mText.length() - originalLength;
10371                dragSourceStart += shift;
10372                dragSourceEnd += shift;
10373            }
10374
10375            // Delete original selection
10376            ((Editable) mText).delete(dragSourceStart, dragSourceEnd);
10377
10378            // Make sure we do not leave two adjacent spaces.
10379            if ((dragSourceStart == 0 ||
10380                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart - 1))) &&
10381                    (dragSourceStart == mText.length() ||
10382                    Character.isSpaceChar(mTransformed.charAt(dragSourceStart)))) {
10383                final int pos = dragSourceStart == mText.length() ?
10384                        dragSourceStart - 1 : dragSourceStart;
10385                ((Editable) mText).delete(pos, pos + 1);
10386            }
10387        }
10388    }
10389
10390    /**
10391     * @return True if this view supports insertion handles.
10392     */
10393    boolean hasInsertionController() {
10394        return mInsertionControllerEnabled;
10395    }
10396
10397    /**
10398     * @return True if this view supports selection handles.
10399     */
10400    boolean hasSelectionController() {
10401        return mSelectionControllerEnabled;
10402    }
10403
10404    InsertionPointCursorController getInsertionController() {
10405        if (!mInsertionControllerEnabled) {
10406            return null;
10407        }
10408
10409        if (mInsertionPointCursorController == null) {
10410            mInsertionPointCursorController = new InsertionPointCursorController();
10411
10412            final ViewTreeObserver observer = getViewTreeObserver();
10413            observer.addOnTouchModeChangeListener(mInsertionPointCursorController);
10414        }
10415
10416        return mInsertionPointCursorController;
10417    }
10418
10419    SelectionModifierCursorController getSelectionController() {
10420        if (!mSelectionControllerEnabled) {
10421            return null;
10422        }
10423
10424        if (mSelectionModifierCursorController == null) {
10425            mSelectionModifierCursorController = new SelectionModifierCursorController();
10426
10427            final ViewTreeObserver observer = getViewTreeObserver();
10428            observer.addOnTouchModeChangeListener(mSelectionModifierCursorController);
10429        }
10430
10431        return mSelectionModifierCursorController;
10432    }
10433
10434    boolean isInBatchEditMode() {
10435        final InputMethodState ims = mInputMethodState;
10436        if (ims != null) {
10437            return ims.mBatchEditNesting > 0;
10438        }
10439        return mInBatchEditControllers;
10440    }
10441
10442    /**
10443     * Resolve the text direction.
10444     *
10445     * Text direction of paragraphs in a TextView is determined using a heuristic. If the correct
10446     * text direction cannot be determined by the heuristic, the view’s resolved layout direction
10447     * determines the direction.
10448     *
10449     * This heuristic and result is applied individually to each paragraph in a TextView, based on
10450     * the text and style content of that paragraph. Paragraph text styles can also be used to force
10451     * a particular direction.
10452     */
10453    @Override
10454    protected void resolveTextDirection() {
10455        int resolvedTextDirection = TEXT_DIRECTION_UNDEFINED;
10456        switch(mTextDirection) {
10457            default:
10458            case TEXT_DIRECTION_INHERIT:
10459                // Try to the text direction from the parent layout. If not possible, then we will
10460                // use the default layout direction to decide later
10461                if (mParent != null && mParent instanceof ViewGroup) {
10462                    resolvedTextDirection = ((ViewGroup) mParent).getResolvedTextDirection();
10463                }
10464                break;
10465            case TEXT_DIRECTION_FIRST_STRONG:
10466                resolvedTextDirection = getTextDirectionFromFirstStrong(mText);
10467                break;
10468            case TEXT_DIRECTION_ANY_RTL:
10469                resolvedTextDirection = getTextDirectionFromAnyRtl(mText);
10470                break;
10471            case TEXT_DIRECTION_CHAR_COUNT:
10472                resolvedTextDirection = getTextDirectionFromCharCount(mText);
10473                break;
10474            case TEXT_DIRECTION_LTR:
10475                resolvedTextDirection = TEXT_DIRECTION_LTR;
10476                break;
10477            case TEXT_DIRECTION_RTL:
10478                resolvedTextDirection = TEXT_DIRECTION_RTL;
10479                break;
10480        }
10481        // if we have been so far unable to get the text direction from the heuristics, then we are
10482        // falling back using the layout direction
10483        if (resolvedTextDirection == TEXT_DIRECTION_UNDEFINED) {
10484            switch(getResolvedLayoutDirection()) {
10485                default:
10486                case LAYOUT_DIRECTION_LTR:
10487                    resolvedTextDirection = TEXT_DIRECTION_LTR;
10488                    break;
10489                case LAYOUT_DIRECTION_RTL:
10490                    resolvedTextDirection = TEXT_DIRECTION_RTL;
10491                    break;
10492            }
10493        }
10494        mResolvedTextDirection = resolvedTextDirection;
10495    }
10496
10497    /**
10498     * Get text direction following the "first strong" heuristic.
10499     *
10500     * @param cs the CharSequence used to get the text direction.
10501     *
10502     * @return {@link #TEXT_DIRECTION_RTL} if direction it RTL, {@link #TEXT_DIRECTION_LTR} if
10503     * direction it LTR or {@link #TEXT_DIRECTION_UNDEFINED} if direction cannot be found.
10504     */
10505    private static int getTextDirectionFromFirstStrong(final CharSequence cs) {
10506        final int length = cs.length();
10507        if (length == 0) {
10508            return TEXT_DIRECTION_UNDEFINED;
10509        }
10510        for(int i = 0; i < length; i++) {
10511            final char c = cs.charAt(i);
10512            final byte dir = Character.getDirectionality(c);
10513            if (isStrongLtrChar(dir)) {
10514                return TEXT_DIRECTION_LTR;
10515            } else if (isStrongRtlChar(dir)) {
10516                return TEXT_DIRECTION_RTL;
10517            }
10518        }
10519        return TEXT_DIRECTION_UNDEFINED;
10520    }
10521
10522    /**
10523     * Get text direction following the "any RTL" heuristic.
10524     *
10525     * @param cs the CharSequence used to get the text direction.
10526     *
10527     * @return {@link #TEXT_DIRECTION_RTL} if direction it RTL, {@link #TEXT_DIRECTION_LTR} if
10528     * direction it LTR or {@link #TEXT_DIRECTION_UNDEFINED} if direction cannot be found.
10529     */
10530    private static int getTextDirectionFromAnyRtl(final CharSequence cs) {
10531        final int length = cs.length();
10532        if (length == 0) {
10533            return TEXT_DIRECTION_UNDEFINED;
10534        }
10535        boolean foundStrongLtr = false;
10536        boolean foundStrongRtl = false;
10537        for(int i = 0; i < length; i++) {
10538            final char c = cs.charAt(i);
10539            final byte dir = Character.getDirectionality(c);
10540            if (isStrongLtrChar(dir)) {
10541                foundStrongLtr = true;
10542            } else if (isStrongRtlChar(dir)) {
10543                foundStrongRtl = true;
10544                break;
10545            }
10546        }
10547        if (foundStrongRtl) {
10548            return TEXT_DIRECTION_RTL;
10549        }
10550        if (foundStrongLtr) {
10551            return TEXT_DIRECTION_LTR;
10552        }
10553        return TEXT_DIRECTION_UNDEFINED;
10554    }
10555
10556    /**
10557     * Get text direction following the "char count" heuristic.
10558     *
10559     * @param cs the CharSequence used to get the text direction.
10560     *
10561     * @return {@link #TEXT_DIRECTION_RTL} if direction it RTL, {@link #TEXT_DIRECTION_LTR} if
10562     * direction it LTR or {@link #TEXT_DIRECTION_UNDEFINED} if direction cannot be found.
10563     */
10564    private int getTextDirectionFromCharCount(CharSequence cs) {
10565        final int length = cs.length();
10566        if (length == 0) {
10567            return TEXT_DIRECTION_UNDEFINED;
10568        }
10569        int countLtr = 0;
10570        int countRtl = 0;
10571        for(int i = 0; i < length; i++) {
10572            final char c = cs.charAt(i);
10573            final byte dir = Character.getDirectionality(c);
10574            if (isStrongLtrChar(dir)) {
10575                countLtr++;
10576            } else if (isStrongRtlChar(dir)) {
10577                countRtl++;
10578            }
10579        }
10580        final float percentLtr = ((float) countLtr) / (countLtr + countRtl);
10581        if (percentLtr > DEFAULT_TEXT_DIRECTION_CHAR_COUNT_THRESHOLD) {
10582            return TEXT_DIRECTION_LTR;
10583        }
10584        final float percentRtl = ((float) countRtl) / (countLtr + countRtl);
10585        if (percentRtl > DEFAULT_TEXT_DIRECTION_CHAR_COUNT_THRESHOLD) {
10586            return TEXT_DIRECTION_RTL;
10587        }
10588        return TEXT_DIRECTION_UNDEFINED;
10589    }
10590
10591    /**
10592     * Return true if the char direction is corresponding to a "strong RTL char" following the
10593     * Unicode Bidirectional Algorithm (UBA).
10594     */
10595    private static boolean isStrongRtlChar(final byte dir) {
10596        return (dir == Character.DIRECTIONALITY_RIGHT_TO_LEFT ||
10597                dir == Character.DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC);
10598    }
10599
10600    /**
10601     * Return true if the char direction is corresponding to a "strong LTR char" following the
10602     * Unicode Bidirectional Algorithm (UBA).
10603     */
10604    private static boolean isStrongLtrChar(final byte dir) {
10605        return (dir == Character.DIRECTIONALITY_LEFT_TO_RIGHT);
10606    }
10607
10608    /**
10609     * Subclasses will need to override this method to implement their own way of resolving
10610     * drawables depending on the layout direction.
10611     *
10612     * A call to the super method will be required from the subclasses implementation.
10613     *
10614     */
10615    protected void resolveDrawables() {
10616        // No need to resolve twice
10617        if (bResolvedDrawables) {
10618            return;
10619        }
10620        // No drawable to resolve
10621        if (mDrawables == null) {
10622            return;
10623        }
10624        // No relative drawable to resolve
10625        if (mDrawables.mDrawableStart == null && mDrawables.mDrawableEnd == null) {
10626            bResolvedDrawables = true;
10627            return;
10628        }
10629
10630        Drawables dr = mDrawables;
10631        switch(getResolvedLayoutDirection()) {
10632            case LAYOUT_DIRECTION_RTL:
10633                if (dr.mDrawableStart != null) {
10634                    dr.mDrawableRight = dr.mDrawableStart;
10635
10636                    dr.mDrawableSizeRight = dr.mDrawableSizeStart;
10637                    dr.mDrawableHeightRight = dr.mDrawableHeightStart;
10638                }
10639                if (dr.mDrawableEnd != null) {
10640                    dr.mDrawableLeft = dr.mDrawableEnd;
10641
10642                    dr.mDrawableSizeLeft = dr.mDrawableSizeEnd;
10643                    dr.mDrawableHeightLeft = dr.mDrawableHeightEnd;
10644                }
10645                break;
10646
10647            case LAYOUT_DIRECTION_LTR:
10648            default:
10649                if (dr.mDrawableStart != null) {
10650                    dr.mDrawableLeft = dr.mDrawableStart;
10651
10652                    dr.mDrawableSizeLeft = dr.mDrawableSizeStart;
10653                    dr.mDrawableHeightLeft = dr.mDrawableHeightStart;
10654                }
10655                if (dr.mDrawableEnd != null) {
10656                    dr.mDrawableRight = dr.mDrawableEnd;
10657
10658                    dr.mDrawableSizeRight = dr.mDrawableSizeEnd;
10659                    dr.mDrawableHeightRight = dr.mDrawableHeightEnd;
10660                }
10661                break;
10662        }
10663        bResolvedDrawables = true;
10664    }
10665
10666    protected void resetResolvedDrawables() {
10667        bResolvedDrawables = false;
10668    }
10669
10670    @ViewDebug.ExportedProperty(category = "text")
10671    private CharSequence            mText;
10672    private CharSequence            mTransformed;
10673    private BufferType              mBufferType = BufferType.NORMAL;
10674
10675    private int                     mInputType = EditorInfo.TYPE_NULL;
10676    private CharSequence            mHint;
10677    private Layout                  mHintLayout;
10678
10679    private KeyListener             mInput;
10680
10681    private MovementMethod          mMovement;
10682    private TransformationMethod    mTransformation;
10683    private boolean                 mAllowTransformationLengthChange;
10684    private ChangeWatcher           mChangeWatcher;
10685
10686    private ArrayList<TextWatcher>  mListeners = null;
10687
10688    // display attributes
10689    private final TextPaint         mTextPaint;
10690    private boolean                 mUserSetTextScaleX;
10691    private final Paint             mHighlightPaint;
10692    private int                     mHighlightColor = 0xCC475925;
10693    /**
10694     * This is temporarily visible to fix bug 3085564 in webView. Do not rely on
10695     * this field being protected. Will be restored as private when lineHeight
10696     * feature request 3215097 is implemented
10697     * @hide
10698     */
10699    protected Layout                mLayout;
10700
10701    private long                    mShowCursor;
10702    private Blink                   mBlink;
10703    private boolean                 mCursorVisible = true;
10704
10705    // Cursor Controllers.
10706    private InsertionPointCursorController mInsertionPointCursorController;
10707    private SelectionModifierCursorController mSelectionModifierCursorController;
10708    private ActionMode              mSelectionActionMode;
10709    private boolean                 mInsertionControllerEnabled;
10710    private boolean                 mSelectionControllerEnabled;
10711    private boolean                 mInBatchEditControllers;
10712
10713    // These are needed to desambiguate a long click. If the long click comes from ones of these, we
10714    // select from the current cursor position. Otherwise, select from long pressed position.
10715    private boolean                 mDPadCenterIsDown = false;
10716    private boolean                 mEnterKeyIsDown = false;
10717    private boolean                 mContextMenuTriggeredByKey = false;
10718    // Created once and shared by different CursorController helper methods.
10719    // Only one cursor controller is active at any time which prevent race conditions.
10720    private static Rect             sCursorControllerTempRect = new Rect();
10721
10722    private boolean                 mSelectAllOnFocus = false;
10723
10724    private int                     mGravity = Gravity.TOP | Gravity.START;
10725    private boolean                 mHorizontallyScrolling;
10726
10727    private int                     mAutoLinkMask;
10728    private boolean                 mLinksClickable = true;
10729
10730    private float                   mSpacingMult = 1;
10731    private float                   mSpacingAdd = 0;
10732    private boolean                 mTextIsSelectable = false;
10733
10734    private static final int        LINES = 1;
10735    private static final int        EMS = LINES;
10736    private static final int        PIXELS = 2;
10737
10738    private int                     mMaximum = Integer.MAX_VALUE;
10739    private int                     mMaxMode = LINES;
10740    private int                     mMinimum = 0;
10741    private int                     mMinMode = LINES;
10742
10743    private int                     mMaxWidth = Integer.MAX_VALUE;
10744    private int                     mMaxWidthMode = PIXELS;
10745    private int                     mMinWidth = 0;
10746    private int                     mMinWidthMode = PIXELS;
10747
10748    private boolean                 mSingleLine;
10749    private int                     mDesiredHeightAtMeasure = -1;
10750    private boolean                 mIncludePad = true;
10751
10752    // tmp primitives, so we don't alloc them on each draw
10753    private Path                    mHighlightPath;
10754    private boolean                 mHighlightPathBogus = true;
10755    private static final RectF      sTempRect = new RectF();
10756
10757    // XXX should be much larger
10758    private static final int        VERY_WIDE = 16384;
10759
10760    private static final int        BLINK = 500;
10761
10762    private static final int ANIMATED_SCROLL_GAP = 250;
10763    private long mLastScroll;
10764    private Scroller mScroller = null;
10765
10766    private BoringLayout.Metrics mBoring;
10767    private BoringLayout.Metrics mHintBoring;
10768
10769    private BoringLayout mSavedLayout, mSavedHintLayout;
10770
10771    private static final InputFilter[] NO_FILTERS = new InputFilter[0];
10772    private InputFilter[] mFilters = NO_FILTERS;
10773    private static final Spanned EMPTY_SPANNED = new SpannedString("");
10774    private static int DRAG_SHADOW_MAX_TEXT_LENGTH = 20;
10775    // System wide time for last cut or copy action.
10776    private static long sLastCutOrCopyTime;
10777    // Used to highlight a word when it is corrected by the IME
10778    private CorrectionHighlighter mCorrectionHighlighter;
10779    // New state used to change background based on whether this TextView is multiline.
10780    private static final int[] MULTILINE_STATE_SET = { R.attr.state_multiline };
10781}
10782