TextView.java revision 715589fb46967ce8aff4406ca7bfc58ad3e3b6ed 
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 static android.os.Build.VERSION_CODES.JELLY_BEAN_MR1;
20import android.R;
21import android.annotation.ColorInt;
22import android.annotation.DrawableRes;
23import android.annotation.NonNull;
24import android.annotation.Nullable;
25import android.annotation.Size;
26import android.annotation.StringRes;
27import android.annotation.StyleRes;
28import android.annotation.XmlRes;
29import android.app.Activity;
30import android.app.assist.AssistStructure;
31import android.content.ClipData;
32import android.content.ClipboardManager;
33import android.content.Context;
34import android.content.Intent;
35import android.content.UndoManager;
36import android.content.res.ColorStateList;
37import android.content.res.CompatibilityInfo;
38import android.content.res.Configuration;
39import android.content.res.Resources;
40import android.content.res.TypedArray;
41import android.content.res.XmlResourceParser;
42import android.graphics.Canvas;
43import android.graphics.Insets;
44import android.graphics.Paint;
45import android.graphics.Path;
46import android.graphics.PorterDuff;
47import android.graphics.Rect;
48import android.graphics.RectF;
49import android.graphics.Typeface;
50import android.graphics.drawable.Drawable;
51import android.os.AsyncTask;
52import android.os.Bundle;
53import android.os.Parcel;
54import android.os.Parcelable;
55import android.os.ParcelableParcel;
56import android.os.SystemClock;
57import android.os.UserHandle;
58import android.provider.Settings;
59import android.text.BoringLayout;
60import android.text.DynamicLayout;
61import android.text.Editable;
62import android.text.GetChars;
63import android.text.GraphicsOperations;
64import android.text.InputFilter;
65import android.text.InputType;
66import android.text.Layout;
67import android.text.ParcelableSpan;
68import android.text.Selection;
69import android.text.SpanWatcher;
70import android.text.Spannable;
71import android.text.SpannableString;
72import android.text.SpannableStringBuilder;
73import android.text.Spanned;
74import android.text.SpannedString;
75import android.text.StaticLayout;
76import android.text.TextDirectionHeuristic;
77import android.text.TextDirectionHeuristics;
78import android.text.TextPaint;
79import android.text.TextUtils;
80import android.text.TextUtils.TruncateAt;
81import android.text.TextWatcher;
82import android.text.method.AllCapsTransformationMethod;
83import android.text.method.ArrowKeyMovementMethod;
84import android.text.method.DateKeyListener;
85import android.text.method.DateTimeKeyListener;
86import android.text.method.DialerKeyListener;
87import android.text.method.DigitsKeyListener;
88import android.text.method.KeyListener;
89import android.text.method.LinkMovementMethod;
90import android.text.method.MetaKeyKeyListener;
91import android.text.method.MovementMethod;
92import android.text.method.PasswordTransformationMethod;
93import android.text.method.SingleLineTransformationMethod;
94import android.text.method.TextKeyListener;
95import android.text.method.TimeKeyListener;
96import android.text.method.TransformationMethod;
97import android.text.method.TransformationMethod2;
98import android.text.method.WordIterator;
99import android.text.style.CharacterStyle;
100import android.text.style.ClickableSpan;
101import android.text.style.ParagraphStyle;
102import android.text.style.SpellCheckSpan;
103import android.text.style.SuggestionSpan;
104import android.text.style.URLSpan;
105import android.text.style.UpdateAppearance;
106import android.text.util.Linkify;
107import android.util.AttributeSet;
108import android.util.LocaleList;
109import android.util.Log;
110import android.util.TypedValue;
111import android.view.AccessibilityIterators.TextSegmentIterator;
112import android.view.ActionMode;
113import android.view.Choreographer;
114import android.view.ContextMenu;
115import android.view.DragEvent;
116import android.view.Gravity;
117import android.view.HapticFeedbackConstants;
118import android.view.KeyCharacterMap;
119import android.view.KeyEvent;
120import android.view.MotionEvent;
121import android.view.PointerIcon;
122import android.view.View;
123import android.view.ViewConfiguration;
124import android.view.ViewDebug;
125import android.view.ViewGroup.LayoutParams;
126import android.view.ViewHierarchyEncoder;
127import android.view.ViewParent;
128import android.view.ViewRootImpl;
129import android.view.ViewStructure;
130import android.view.ViewTreeObserver;
131import android.view.accessibility.AccessibilityEvent;
132import android.view.accessibility.AccessibilityManager;
133import android.view.accessibility.AccessibilityNodeInfo;
134import android.view.animation.AnimationUtils;
135import android.view.inputmethod.BaseInputConnection;
136import android.view.inputmethod.CompletionInfo;
137import android.view.inputmethod.CorrectionInfo;
138import android.view.inputmethod.EditorInfo;
139import android.view.inputmethod.ExtractedText;
140import android.view.inputmethod.ExtractedTextRequest;
141import android.view.inputmethod.InputConnection;
142import android.view.inputmethod.InputMethodManager;
143import android.view.textservice.SpellCheckerSubtype;
144import android.view.textservice.TextServicesManager;
145import android.widget.RemoteViews.RemoteView;
146
147import com.android.internal.annotations.VisibleForTesting;
148import com.android.internal.util.FastMath;
149import com.android.internal.widget.EditableInputConnection;
150
151import org.xmlpull.v1.XmlPullParserException;
152
153import java.io.IOException;
154import java.lang.ref.WeakReference;
155import java.util.ArrayList;
156import java.util.Locale;
157
158/**
159 * Displays text to the user and optionally allows them to edit it.  A TextView
160 * is a complete text editor, however the basic class is configured to not
161 * allow editing; see {@link EditText} for a subclass that configures the text
162 * view for editing.
163 *
164 * <p>
165 * To allow users to copy some or all of the TextView's value and paste it somewhere else, set the
166 * XML attribute {@link android.R.styleable#TextView_textIsSelectable
167 * android:textIsSelectable} to "true" or call
168 * {@link #setTextIsSelectable setTextIsSelectable(true)}. The {@code textIsSelectable} flag
169 * allows users to make selection gestures in the TextView, which in turn triggers the system's
170 * built-in copy/paste controls.
171 * <p>
172 * <b>XML attributes</b>
173 * <p>
174 * See {@link android.R.styleable#TextView TextView Attributes},
175 * {@link android.R.styleable#View View Attributes}
176 *
177 * @attr ref android.R.styleable#TextView_text
178 * @attr ref android.R.styleable#TextView_bufferType
179 * @attr ref android.R.styleable#TextView_hint
180 * @attr ref android.R.styleable#TextView_textColor
181 * @attr ref android.R.styleable#TextView_textColorHighlight
182 * @attr ref android.R.styleable#TextView_textColorHint
183 * @attr ref android.R.styleable#TextView_textAppearance
184 * @attr ref android.R.styleable#TextView_textColorLink
185 * @attr ref android.R.styleable#TextView_textSize
186 * @attr ref android.R.styleable#TextView_textScaleX
187 * @attr ref android.R.styleable#TextView_fontFamily
188 * @attr ref android.R.styleable#TextView_typeface
189 * @attr ref android.R.styleable#TextView_textStyle
190 * @attr ref android.R.styleable#TextView_cursorVisible
191 * @attr ref android.R.styleable#TextView_maxLines
192 * @attr ref android.R.styleable#TextView_maxHeight
193 * @attr ref android.R.styleable#TextView_lines
194 * @attr ref android.R.styleable#TextView_height
195 * @attr ref android.R.styleable#TextView_minLines
196 * @attr ref android.R.styleable#TextView_minHeight
197 * @attr ref android.R.styleable#TextView_maxEms
198 * @attr ref android.R.styleable#TextView_maxWidth
199 * @attr ref android.R.styleable#TextView_ems
200 * @attr ref android.R.styleable#TextView_width
201 * @attr ref android.R.styleable#TextView_minEms
202 * @attr ref android.R.styleable#TextView_minWidth
203 * @attr ref android.R.styleable#TextView_gravity
204 * @attr ref android.R.styleable#TextView_scrollHorizontally
205 * @attr ref android.R.styleable#TextView_password
206 * @attr ref android.R.styleable#TextView_singleLine
207 * @attr ref android.R.styleable#TextView_selectAllOnFocus
208 * @attr ref android.R.styleable#TextView_includeFontPadding
209 * @attr ref android.R.styleable#TextView_maxLength
210 * @attr ref android.R.styleable#TextView_shadowColor
211 * @attr ref android.R.styleable#TextView_shadowDx
212 * @attr ref android.R.styleable#TextView_shadowDy
213 * @attr ref android.R.styleable#TextView_shadowRadius
214 * @attr ref android.R.styleable#TextView_autoLink
215 * @attr ref android.R.styleable#TextView_linksClickable
216 * @attr ref android.R.styleable#TextView_numeric
217 * @attr ref android.R.styleable#TextView_digits
218 * @attr ref android.R.styleable#TextView_phoneNumber
219 * @attr ref android.R.styleable#TextView_inputMethod
220 * @attr ref android.R.styleable#TextView_capitalize
221 * @attr ref android.R.styleable#TextView_autoText
222 * @attr ref android.R.styleable#TextView_editable
223 * @attr ref android.R.styleable#TextView_freezesText
224 * @attr ref android.R.styleable#TextView_ellipsize
225 * @attr ref android.R.styleable#TextView_drawableTop
226 * @attr ref android.R.styleable#TextView_drawableBottom
227 * @attr ref android.R.styleable#TextView_drawableRight
228 * @attr ref android.R.styleable#TextView_drawableLeft
229 * @attr ref android.R.styleable#TextView_drawableStart
230 * @attr ref android.R.styleable#TextView_drawableEnd
231 * @attr ref android.R.styleable#TextView_drawablePadding
232 * @attr ref android.R.styleable#TextView_drawableTint
233 * @attr ref android.R.styleable#TextView_drawableTintMode
234 * @attr ref android.R.styleable#TextView_lineSpacingExtra
235 * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
236 * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
237 * @attr ref android.R.styleable#TextView_inputType
238 * @attr ref android.R.styleable#TextView_imeOptions
239 * @attr ref android.R.styleable#TextView_privateImeOptions
240 * @attr ref android.R.styleable#TextView_imeActionLabel
241 * @attr ref android.R.styleable#TextView_imeActionId
242 * @attr ref android.R.styleable#TextView_editorExtras
243 * @attr ref android.R.styleable#TextView_elegantTextHeight
244 * @attr ref android.R.styleable#TextView_letterSpacing
245 * @attr ref android.R.styleable#TextView_fontFeatureSettings
246 * @attr ref android.R.styleable#TextView_breakStrategy
247 * @attr ref android.R.styleable#TextView_hyphenationFrequency
248 */
249@RemoteView
250public class TextView extends View implements ViewTreeObserver.OnPreDrawListener {
251    static final String LOG_TAG = "TextView";
252    static final boolean DEBUG_EXTRACT = false;
253
254    // Enum for the "typeface" XML parameter.
255    // TODO: How can we get this from the XML instead of hardcoding it here?
256    private static final int SANS = 1;
257    private static final int SERIF = 2;
258    private static final int MONOSPACE = 3;
259
260    // Bitfield for the "numeric" XML parameter.
261    // TODO: How can we get this from the XML instead of hardcoding it here?
262    private static final int SIGNED = 2;
263    private static final int DECIMAL = 4;
264
265    /**
266     * Draw marquee text with fading edges as usual
267     */
268    private static final int MARQUEE_FADE_NORMAL = 0;
269
270    /**
271     * Draw marquee text as ellipsize end while inactive instead of with the fade.
272     * (Useful for devices where the fade can be expensive if overdone)
273     */
274    private static final int MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS = 1;
275
276    /**
277     * Draw marquee text with fading edges because it is currently active/animating.
278     */
279    private static final int MARQUEE_FADE_SWITCH_SHOW_FADE = 2;
280
281    private static final int LINES = 1;
282    private static final int EMS = LINES;
283    private static final int PIXELS = 2;
284
285    private static final RectF TEMP_RECTF = new RectF();
286
287    // XXX should be much larger
288    private static final int VERY_WIDE = 1024*1024;
289    private static final int ANIMATED_SCROLL_GAP = 250;
290
291    private static final InputFilter[] NO_FILTERS = new InputFilter[0];
292    private static final Spanned EMPTY_SPANNED = new SpannedString("");
293
294    private static final int CHANGE_WATCHER_PRIORITY = 100;
295
296    // New state used to change background based on whether this TextView is multiline.
297    private static final int[] MULTILINE_STATE_SET = { R.attr.state_multiline };
298
299    // Accessibility action to share selected text.
300    private static final int ACCESSIBILITY_ACTION_SHARE = 0x10000000;
301
302    /**
303     * @hide
304     */
305    // Accessibility action start id for "process text" actions.
306    static final int ACCESSIBILITY_ACTION_PROCESS_TEXT_START_ID = 0x10000100;
307
308    /**
309     * @hide
310     */
311    static final int PROCESS_TEXT_REQUEST_CODE = 100;
312
313    /**
314     *  Return code of {@link #doKeyDown}.
315     */
316    private static final int KEY_EVENT_NOT_HANDLED = 0;
317    private static final int KEY_EVENT_HANDLED = -1;
318    private static final int KEY_DOWN_HANDLED_BY_KEY_LISTENER = 1;
319    private static final int KEY_DOWN_HANDLED_BY_MOVEMENT_METHOD = 2;
320
321    // System wide time for last cut, copy or text changed action.
322    static long sLastCutCopyOrTextChangedTime;
323
324    private ColorStateList mTextColor;
325    private ColorStateList mHintTextColor;
326    private ColorStateList mLinkTextColor;
327    @ViewDebug.ExportedProperty(category = "text")
328    private int mCurTextColor;
329    private int mCurHintTextColor;
330    private boolean mFreezesText;
331    private boolean mDispatchTemporaryDetach;
332
333    /** Whether this view is temporarily detached from the parent view. */
334    boolean mTemporaryDetach;
335
336    private Editable.Factory mEditableFactory = Editable.Factory.getInstance();
337    private Spannable.Factory mSpannableFactory = Spannable.Factory.getInstance();
338
339    private float mShadowRadius, mShadowDx, mShadowDy;
340    private int mShadowColor;
341
342    private boolean mPreDrawRegistered;
343    private boolean mPreDrawListenerDetached;
344
345    // A flag to prevent repeated movements from escaping the enclosing text view. The idea here is
346    // that if a user is holding down a movement key to traverse text, we shouldn't also traverse
347    // the view hierarchy. On the other hand, if the user is using the movement key to traverse views
348    // (i.e. the first movement was to traverse out of this view, or this view was traversed into by
349    // the user holding the movement key down) then we shouldn't prevent the focus from changing.
350    private boolean mPreventDefaultMovement;
351
352    private TextUtils.TruncateAt mEllipsize;
353
354    static class Drawables {
355        static final int LEFT = 0;
356        static final int TOP = 1;
357        static final int RIGHT = 2;
358        static final int BOTTOM = 3;
359
360        static final int DRAWABLE_NONE = -1;
361        static final int DRAWABLE_RIGHT = 0;
362        static final int DRAWABLE_LEFT = 1;
363
364        final Rect mCompoundRect = new Rect();
365
366        final Drawable[] mShowing = new Drawable[4];
367
368        ColorStateList mTintList;
369        PorterDuff.Mode mTintMode;
370        boolean mHasTint;
371        boolean mHasTintMode;
372
373        Drawable mDrawableStart, mDrawableEnd, mDrawableError, mDrawableTemp;
374        Drawable mDrawableLeftInitial, mDrawableRightInitial;
375
376        boolean mIsRtlCompatibilityMode;
377        boolean mOverride;
378
379        int mDrawableSizeTop, mDrawableSizeBottom, mDrawableSizeLeft, mDrawableSizeRight,
380                mDrawableSizeStart, mDrawableSizeEnd, mDrawableSizeError, mDrawableSizeTemp;
381
382        int mDrawableWidthTop, mDrawableWidthBottom, mDrawableHeightLeft, mDrawableHeightRight,
383                mDrawableHeightStart, mDrawableHeightEnd, mDrawableHeightError, mDrawableHeightTemp;
384
385        int mDrawablePadding;
386
387        int mDrawableSaved = DRAWABLE_NONE;
388
389        public Drawables(Context context) {
390            final int targetSdkVersion = context.getApplicationInfo().targetSdkVersion;
391            mIsRtlCompatibilityMode = (targetSdkVersion < JELLY_BEAN_MR1 ||
392                !context.getApplicationInfo().hasRtlSupport());
393            mOverride = false;
394        }
395
396        /**
397         * @return {@code true} if this object contains metadata that needs to
398         *         be retained, {@code false} otherwise
399         */
400        public boolean hasMetadata() {
401            return mDrawablePadding != 0 || mHasTintMode || mHasTint;
402        }
403
404        /**
405         * Updates the list of displayed drawables to account for the current
406         * layout direction.
407         *
408         * @param layoutDirection the current layout direction
409         * @return {@code true} if the displayed drawables changed
410         */
411        public boolean resolveWithLayoutDirection(int layoutDirection) {
412            final Drawable previousLeft = mShowing[Drawables.LEFT];
413            final Drawable previousRight = mShowing[Drawables.RIGHT];
414
415            // First reset "left" and "right" drawables to their initial values
416            mShowing[Drawables.LEFT] = mDrawableLeftInitial;
417            mShowing[Drawables.RIGHT] = mDrawableRightInitial;
418
419            if (mIsRtlCompatibilityMode) {
420                // Use "start" drawable as "left" drawable if the "left" drawable was not defined
421                if (mDrawableStart != null && mShowing[Drawables.LEFT] == null) {
422                    mShowing[Drawables.LEFT] = mDrawableStart;
423                    mDrawableSizeLeft = mDrawableSizeStart;
424                    mDrawableHeightLeft = mDrawableHeightStart;
425                }
426                // Use "end" drawable as "right" drawable if the "right" drawable was not defined
427                if (mDrawableEnd != null && mShowing[Drawables.RIGHT] == null) {
428                    mShowing[Drawables.RIGHT] = mDrawableEnd;
429                    mDrawableSizeRight = mDrawableSizeEnd;
430                    mDrawableHeightRight = mDrawableHeightEnd;
431                }
432            } else {
433                // JB-MR1+ normal case: "start" / "end" drawables are overriding "left" / "right"
434                // drawable if and only if they have been defined
435                switch(layoutDirection) {
436                    case LAYOUT_DIRECTION_RTL:
437                        if (mOverride) {
438                            mShowing[Drawables.RIGHT] = mDrawableStart;
439                            mDrawableSizeRight = mDrawableSizeStart;
440                            mDrawableHeightRight = mDrawableHeightStart;
441
442                            mShowing[Drawables.LEFT] = mDrawableEnd;
443                            mDrawableSizeLeft = mDrawableSizeEnd;
444                            mDrawableHeightLeft = mDrawableHeightEnd;
445                        }
446                        break;
447
448                    case LAYOUT_DIRECTION_LTR:
449                    default:
450                        if (mOverride) {
451                            mShowing[Drawables.LEFT] = mDrawableStart;
452                            mDrawableSizeLeft = mDrawableSizeStart;
453                            mDrawableHeightLeft = mDrawableHeightStart;
454
455                            mShowing[Drawables.RIGHT] = mDrawableEnd;
456                            mDrawableSizeRight = mDrawableSizeEnd;
457                            mDrawableHeightRight = mDrawableHeightEnd;
458                        }
459                        break;
460                }
461            }
462
463            applyErrorDrawableIfNeeded(layoutDirection);
464
465            return mShowing[Drawables.LEFT] != previousLeft
466                    || mShowing[Drawables.RIGHT] != previousRight;
467        }
468
469        public void setErrorDrawable(Drawable dr, TextView tv) {
470            if (mDrawableError != dr && mDrawableError != null) {
471                mDrawableError.setCallback(null);
472            }
473            mDrawableError = dr;
474
475            if (mDrawableError != null) {
476                final Rect compoundRect = mCompoundRect;
477                final int[] state = tv.getDrawableState();
478
479                mDrawableError.setState(state);
480                mDrawableError.copyBounds(compoundRect);
481                mDrawableError.setCallback(tv);
482                mDrawableSizeError = compoundRect.width();
483                mDrawableHeightError = compoundRect.height();
484            } else {
485                mDrawableSizeError = mDrawableHeightError = 0;
486            }
487        }
488
489        private void applyErrorDrawableIfNeeded(int layoutDirection) {
490            // first restore the initial state if needed
491            switch (mDrawableSaved) {
492                case DRAWABLE_LEFT:
493                    mShowing[Drawables.LEFT] = mDrawableTemp;
494                    mDrawableSizeLeft = mDrawableSizeTemp;
495                    mDrawableHeightLeft = mDrawableHeightTemp;
496                    break;
497                case DRAWABLE_RIGHT:
498                    mShowing[Drawables.RIGHT] = mDrawableTemp;
499                    mDrawableSizeRight = mDrawableSizeTemp;
500                    mDrawableHeightRight = mDrawableHeightTemp;
501                    break;
502                case DRAWABLE_NONE:
503                default:
504            }
505            // then, if needed, assign the Error drawable to the correct location
506            if (mDrawableError != null) {
507                switch(layoutDirection) {
508                    case LAYOUT_DIRECTION_RTL:
509                        mDrawableSaved = DRAWABLE_LEFT;
510
511                        mDrawableTemp = mShowing[Drawables.LEFT];
512                        mDrawableSizeTemp = mDrawableSizeLeft;
513                        mDrawableHeightTemp = mDrawableHeightLeft;
514
515                        mShowing[Drawables.LEFT] = mDrawableError;
516                        mDrawableSizeLeft = mDrawableSizeError;
517                        mDrawableHeightLeft = mDrawableHeightError;
518                        break;
519                    case LAYOUT_DIRECTION_LTR:
520                    default:
521                        mDrawableSaved = DRAWABLE_RIGHT;
522
523                        mDrawableTemp = mShowing[Drawables.RIGHT];
524                        mDrawableSizeTemp = mDrawableSizeRight;
525                        mDrawableHeightTemp = mDrawableHeightRight;
526
527                        mShowing[Drawables.RIGHT] = mDrawableError;
528                        mDrawableSizeRight = mDrawableSizeError;
529                        mDrawableHeightRight = mDrawableHeightError;
530                        break;
531                }
532            }
533        }
534    }
535
536    Drawables mDrawables;
537
538    private CharWrapper mCharWrapper;
539
540    private Marquee mMarquee;
541    private boolean mRestartMarquee;
542
543    private int mMarqueeRepeatLimit = 3;
544
545    private int mLastLayoutDirection = -1;
546
547    /**
548     * On some devices the fading edges add a performance penalty if used
549     * extensively in the same layout. This mode indicates how the marquee
550     * is currently being shown, if applicable. (mEllipsize will == MARQUEE)
551     */
552    private int mMarqueeFadeMode = MARQUEE_FADE_NORMAL;
553
554    /**
555     * When mMarqueeFadeMode is not MARQUEE_FADE_NORMAL, this stores
556     * the layout that should be used when the mode switches.
557     */
558    private Layout mSavedMarqueeModeLayout;
559
560    @ViewDebug.ExportedProperty(category = "text")
561    private CharSequence mText;
562    private CharSequence mTransformed;
563    private BufferType mBufferType = BufferType.NORMAL;
564
565    private CharSequence mHint;
566    private Layout mHintLayout;
567
568    private MovementMethod mMovement;
569
570    private TransformationMethod mTransformation;
571    private boolean mAllowTransformationLengthChange;
572    private ChangeWatcher mChangeWatcher;
573
574    private ArrayList<TextWatcher> mListeners;
575
576    // display attributes
577    private final TextPaint mTextPaint;
578    private boolean mUserSetTextScaleX;
579    private Layout mLayout;
580    private boolean mLocalesChanged = false;
581
582    @ViewDebug.ExportedProperty(category = "text")
583    private int mGravity = Gravity.TOP | Gravity.START;
584    private boolean mHorizontallyScrolling;
585
586    private int mAutoLinkMask;
587    private boolean mLinksClickable = true;
588
589    private float mSpacingMult = 1.0f;
590    private float mSpacingAdd = 0.0f;
591
592    private int mBreakStrategy;
593    private int mHyphenationFrequency;
594
595    private int mMaximum = Integer.MAX_VALUE;
596    private int mMaxMode = LINES;
597    private int mMinimum = 0;
598    private int mMinMode = LINES;
599
600    private int mOldMaximum = mMaximum;
601    private int mOldMaxMode = mMaxMode;
602
603    private int mMaxWidth = Integer.MAX_VALUE;
604    private int mMaxWidthMode = PIXELS;
605    private int mMinWidth = 0;
606    private int mMinWidthMode = PIXELS;
607
608    private boolean mSingleLine;
609    private int mDesiredHeightAtMeasure = -1;
610    private boolean mIncludePad = true;
611    private int mDeferScroll = -1;
612
613    // tmp primitives, so we don't alloc them on each draw
614    private Rect mTempRect;
615    private long mLastScroll;
616    private Scroller mScroller;
617
618    private BoringLayout.Metrics mBoring, mHintBoring;
619    private BoringLayout mSavedLayout, mSavedHintLayout;
620
621    private TextDirectionHeuristic mTextDir;
622
623    private InputFilter[] mFilters = NO_FILTERS;
624
625    private volatile Locale mCurrentSpellCheckerLocaleCache;
626
627    // It is possible to have a selection even when mEditor is null (programmatically set, like when
628    // a link is pressed). These highlight-related fields do not go in mEditor.
629    int mHighlightColor = 0x6633B5E5;
630    private Path mHighlightPath;
631    private final Paint mHighlightPaint;
632    private boolean mHighlightPathBogus = true;
633
634    // Although these fields are specific to editable text, they are not added to Editor because
635    // they are defined by the TextView's style and are theme-dependent.
636    int mCursorDrawableRes;
637    // These six fields, could be moved to Editor, since we know their default values and we
638    // could condition the creation of the Editor to a non standard value. This is however
639    // brittle since the hardcoded values here (such as
640    // com.android.internal.R.drawable.text_select_handle_left) would have to be updated if the
641    // default style is modified.
642    int mTextSelectHandleLeftRes;
643    int mTextSelectHandleRightRes;
644    int mTextSelectHandleRes;
645    int mTextEditSuggestionItemLayout;
646    int mTextEditSuggestionContainerLayout;
647    int mTextEditSuggestionHighlightStyle;
648
649    /**
650     * EditText specific data, created on demand when one of the Editor fields is used.
651     * See {@link #createEditorIfNeeded()}.
652     */
653    private Editor mEditor;
654
655    private static final int DEVICE_PROVISIONED_UNKNOWN = 0;
656    private static final int DEVICE_PROVISIONED_NO = 1;
657    private static final int DEVICE_PROVISIONED_YES = 2;
658
659    /**
660     * Some special options such as sharing selected text should only be shown if the device
661     * is provisioned. Only check the provisioned state once for a given view instance.
662     */
663    private int mDeviceProvisionedState = DEVICE_PROVISIONED_UNKNOWN;
664
665    /*
666     * Kick-start the font cache for the zygote process (to pay the cost of
667     * initializing freetype for our default font only once).
668     */
669    static {
670        Paint p = new Paint();
671        p.setAntiAlias(true);
672        // We don't care about the result, just the side-effect of measuring.
673        p.measureText("H");
674    }
675
676    /**
677     * Interface definition for a callback to be invoked when an action is
678     * performed on the editor.
679     */
680    public interface OnEditorActionListener {
681        /**
682         * Called when an action is being performed.
683         *
684         * @param v The view that was clicked.
685         * @param actionId Identifier of the action.  This will be either the
686         * identifier you supplied, or {@link EditorInfo#IME_NULL
687         * EditorInfo.IME_NULL} if being called due to the enter key
688         * being pressed.
689         * @param event If triggered by an enter key, this is the event;
690         * otherwise, this is null.
691         * @return Return true if you have consumed the action, else false.
692         */
693        boolean onEditorAction(TextView v, int actionId, KeyEvent event);
694    }
695
696    public TextView(Context context) {
697        this(context, null);
698    }
699
700    public TextView(Context context, @Nullable AttributeSet attrs) {
701        this(context, attrs, com.android.internal.R.attr.textViewStyle);
702    }
703
704    public TextView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
705        this(context, attrs, defStyleAttr, 0);
706    }
707
708    @SuppressWarnings("deprecation")
709    public TextView(
710            Context context, @Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes) {
711        super(context, attrs, defStyleAttr, defStyleRes);
712
713        mText = "";
714
715        final Resources res = getResources();
716        final CompatibilityInfo compat = res.getCompatibilityInfo();
717
718        mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
719        mTextPaint.density = res.getDisplayMetrics().density;
720        mTextPaint.setCompatibilityScaling(compat.applicationScale);
721
722        mHighlightPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
723        mHighlightPaint.setCompatibilityScaling(compat.applicationScale);
724
725        mMovement = getDefaultMovementMethod();
726
727        mTransformation = null;
728
729        int textColorHighlight = 0;
730        ColorStateList textColor = null;
731        ColorStateList textColorHint = null;
732        ColorStateList textColorLink = null;
733        int textSize = 15;
734        String fontFamily = null;
735        boolean fontFamilyExplicit = false;
736        int typefaceIndex = -1;
737        int styleIndex = -1;
738        boolean allCaps = false;
739        int shadowcolor = 0;
740        float dx = 0, dy = 0, r = 0;
741        boolean elegant = false;
742        float letterSpacing = 0;
743        String fontFeatureSettings = null;
744        mBreakStrategy = Layout.BREAK_STRATEGY_SIMPLE;
745        mHyphenationFrequency = Layout.HYPHENATION_FREQUENCY_NONE;
746
747        final Resources.Theme theme = context.getTheme();
748
749        /*
750         * Look the appearance up without checking first if it exists because
751         * almost every TextView has one and it greatly simplifies the logic
752         * to be able to parse the appearance first and then let specific tags
753         * for this View override it.
754         */
755        TypedArray a = theme.obtainStyledAttributes(attrs,
756                com.android.internal.R.styleable.TextViewAppearance, defStyleAttr, defStyleRes);
757        TypedArray appearance = null;
758        int ap = a.getResourceId(
759                com.android.internal.R.styleable.TextViewAppearance_textAppearance, -1);
760        a.recycle();
761        if (ap != -1) {
762            appearance = theme.obtainStyledAttributes(
763                    ap, com.android.internal.R.styleable.TextAppearance);
764        }
765        if (appearance != null) {
766            int n = appearance.getIndexCount();
767            for (int i = 0; i < n; i++) {
768                int attr = appearance.getIndex(i);
769
770                switch (attr) {
771                case com.android.internal.R.styleable.TextAppearance_textColorHighlight:
772                    textColorHighlight = appearance.getColor(attr, textColorHighlight);
773                    break;
774
775                case com.android.internal.R.styleable.TextAppearance_textColor:
776                    textColor = appearance.getColorStateList(attr);
777                    break;
778
779                case com.android.internal.R.styleable.TextAppearance_textColorHint:
780                    textColorHint = appearance.getColorStateList(attr);
781                    break;
782
783                case com.android.internal.R.styleable.TextAppearance_textColorLink:
784                    textColorLink = appearance.getColorStateList(attr);
785                    break;
786
787                case com.android.internal.R.styleable.TextAppearance_textSize:
788                    textSize = appearance.getDimensionPixelSize(attr, textSize);
789                    break;
790
791                case com.android.internal.R.styleable.TextAppearance_typeface:
792                    typefaceIndex = appearance.getInt(attr, -1);
793                    break;
794
795                case com.android.internal.R.styleable.TextAppearance_fontFamily:
796                    fontFamily = appearance.getString(attr);
797                    break;
798
799                case com.android.internal.R.styleable.TextAppearance_textStyle:
800                    styleIndex = appearance.getInt(attr, -1);
801                    break;
802
803                case com.android.internal.R.styleable.TextAppearance_textAllCaps:
804                    allCaps = appearance.getBoolean(attr, false);
805                    break;
806
807                case com.android.internal.R.styleable.TextAppearance_shadowColor:
808                    shadowcolor = appearance.getInt(attr, 0);
809                    break;
810
811                case com.android.internal.R.styleable.TextAppearance_shadowDx:
812                    dx = appearance.getFloat(attr, 0);
813                    break;
814
815                case com.android.internal.R.styleable.TextAppearance_shadowDy:
816                    dy = appearance.getFloat(attr, 0);
817                    break;
818
819                case com.android.internal.R.styleable.TextAppearance_shadowRadius:
820                    r = appearance.getFloat(attr, 0);
821                    break;
822
823                case com.android.internal.R.styleable.TextAppearance_elegantTextHeight:
824                    elegant = appearance.getBoolean(attr, false);
825                    break;
826
827                case com.android.internal.R.styleable.TextAppearance_letterSpacing:
828                    letterSpacing = appearance.getFloat(attr, 0);
829                    break;
830
831                case com.android.internal.R.styleable.TextAppearance_fontFeatureSettings:
832                    fontFeatureSettings = appearance.getString(attr);
833                    break;
834                }
835            }
836
837            appearance.recycle();
838        }
839
840        boolean editable = getDefaultEditable();
841        CharSequence inputMethod = null;
842        int numeric = 0;
843        CharSequence digits = null;
844        boolean phone = false;
845        boolean autotext = false;
846        int autocap = -1;
847        int buffertype = 0;
848        boolean selectallonfocus = false;
849        Drawable drawableLeft = null, drawableTop = null, drawableRight = null,
850            drawableBottom = null, drawableStart = null, drawableEnd = null;
851        ColorStateList drawableTint = null;
852        PorterDuff.Mode drawableTintMode = null;
853        int drawablePadding = 0;
854        int ellipsize = -1;
855        boolean singleLine = false;
856        int maxlength = -1;
857        CharSequence text = "";
858        CharSequence hint = null;
859        boolean password = false;
860        int inputType = EditorInfo.TYPE_NULL;
861
862        a = theme.obtainStyledAttributes(
863                    attrs, com.android.internal.R.styleable.TextView, defStyleAttr, defStyleRes);
864
865        int n = a.getIndexCount();
866        for (int i = 0; i < n; i++) {
867            int attr = a.getIndex(i);
868
869            switch (attr) {
870            case com.android.internal.R.styleable.TextView_editable:
871                editable = a.getBoolean(attr, editable);
872                break;
873
874            case com.android.internal.R.styleable.TextView_inputMethod:
875                inputMethod = a.getText(attr);
876                break;
877
878            case com.android.internal.R.styleable.TextView_numeric:
879                numeric = a.getInt(attr, numeric);
880                break;
881
882            case com.android.internal.R.styleable.TextView_digits:
883                digits = a.getText(attr);
884                break;
885
886            case com.android.internal.R.styleable.TextView_phoneNumber:
887                phone = a.getBoolean(attr, phone);
888                break;
889
890            case com.android.internal.R.styleable.TextView_autoText:
891                autotext = a.getBoolean(attr, autotext);
892                break;
893
894            case com.android.internal.R.styleable.TextView_capitalize:
895                autocap = a.getInt(attr, autocap);
896                break;
897
898            case com.android.internal.R.styleable.TextView_bufferType:
899                buffertype = a.getInt(attr, buffertype);
900                break;
901
902            case com.android.internal.R.styleable.TextView_selectAllOnFocus:
903                selectallonfocus = a.getBoolean(attr, selectallonfocus);
904                break;
905
906            case com.android.internal.R.styleable.TextView_autoLink:
907                mAutoLinkMask = a.getInt(attr, 0);
908                break;
909
910            case com.android.internal.R.styleable.TextView_linksClickable:
911                mLinksClickable = a.getBoolean(attr, true);
912                break;
913
914            case com.android.internal.R.styleable.TextView_drawableLeft:
915                drawableLeft = a.getDrawable(attr);
916                break;
917
918            case com.android.internal.R.styleable.TextView_drawableTop:
919                drawableTop = a.getDrawable(attr);
920                break;
921
922            case com.android.internal.R.styleable.TextView_drawableRight:
923                drawableRight = a.getDrawable(attr);
924                break;
925
926            case com.android.internal.R.styleable.TextView_drawableBottom:
927                drawableBottom = a.getDrawable(attr);
928                break;
929
930            case com.android.internal.R.styleable.TextView_drawableStart:
931                drawableStart = a.getDrawable(attr);
932                break;
933
934            case com.android.internal.R.styleable.TextView_drawableEnd:
935                drawableEnd = a.getDrawable(attr);
936                break;
937
938            case com.android.internal.R.styleable.TextView_drawableTint:
939                drawableTint = a.getColorStateList(attr);
940                break;
941
942            case com.android.internal.R.styleable.TextView_drawableTintMode:
943                drawableTintMode = Drawable.parseTintMode(a.getInt(attr, -1), drawableTintMode);
944                break;
945
946            case com.android.internal.R.styleable.TextView_drawablePadding:
947                drawablePadding = a.getDimensionPixelSize(attr, drawablePadding);
948                break;
949
950            case com.android.internal.R.styleable.TextView_maxLines:
951                setMaxLines(a.getInt(attr, -1));
952                break;
953
954            case com.android.internal.R.styleable.TextView_maxHeight:
955                setMaxHeight(a.getDimensionPixelSize(attr, -1));
956                break;
957
958            case com.android.internal.R.styleable.TextView_lines:
959                setLines(a.getInt(attr, -1));
960                break;
961
962            case com.android.internal.R.styleable.TextView_height:
963                setHeight(a.getDimensionPixelSize(attr, -1));
964                break;
965
966            case com.android.internal.R.styleable.TextView_minLines:
967                setMinLines(a.getInt(attr, -1));
968                break;
969
970            case com.android.internal.R.styleable.TextView_minHeight:
971                setMinHeight(a.getDimensionPixelSize(attr, -1));
972                break;
973
974            case com.android.internal.R.styleable.TextView_maxEms:
975                setMaxEms(a.getInt(attr, -1));
976                break;
977
978            case com.android.internal.R.styleable.TextView_maxWidth:
979                setMaxWidth(a.getDimensionPixelSize(attr, -1));
980                break;
981
982            case com.android.internal.R.styleable.TextView_ems:
983                setEms(a.getInt(attr, -1));
984                break;
985
986            case com.android.internal.R.styleable.TextView_width:
987                setWidth(a.getDimensionPixelSize(attr, -1));
988                break;
989
990            case com.android.internal.R.styleable.TextView_minEms:
991                setMinEms(a.getInt(attr, -1));
992                break;
993
994            case com.android.internal.R.styleable.TextView_minWidth:
995                setMinWidth(a.getDimensionPixelSize(attr, -1));
996                break;
997
998            case com.android.internal.R.styleable.TextView_gravity:
999                setGravity(a.getInt(attr, -1));
1000                break;
1001
1002            case com.android.internal.R.styleable.TextView_hint:
1003                hint = a.getText(attr);
1004                break;
1005
1006            case com.android.internal.R.styleable.TextView_text:
1007                text = a.getText(attr);
1008                break;
1009
1010            case com.android.internal.R.styleable.TextView_scrollHorizontally:
1011                if (a.getBoolean(attr, false)) {
1012                    setHorizontallyScrolling(true);
1013                }
1014                break;
1015
1016            case com.android.internal.R.styleable.TextView_singleLine:
1017                singleLine = a.getBoolean(attr, singleLine);
1018                break;
1019
1020            case com.android.internal.R.styleable.TextView_ellipsize:
1021                ellipsize = a.getInt(attr, ellipsize);
1022                break;
1023
1024            case com.android.internal.R.styleable.TextView_marqueeRepeatLimit:
1025                setMarqueeRepeatLimit(a.getInt(attr, mMarqueeRepeatLimit));
1026                break;
1027
1028            case com.android.internal.R.styleable.TextView_includeFontPadding:
1029                if (!a.getBoolean(attr, true)) {
1030                    setIncludeFontPadding(false);
1031                }
1032                break;
1033
1034            case com.android.internal.R.styleable.TextView_cursorVisible:
1035                if (!a.getBoolean(attr, true)) {
1036                    setCursorVisible(false);
1037                }
1038                break;
1039
1040            case com.android.internal.R.styleable.TextView_maxLength:
1041                maxlength = a.getInt(attr, -1);
1042                break;
1043
1044            case com.android.internal.R.styleable.TextView_textScaleX:
1045                setTextScaleX(a.getFloat(attr, 1.0f));
1046                break;
1047
1048            case com.android.internal.R.styleable.TextView_freezesText:
1049                mFreezesText = a.getBoolean(attr, false);
1050                break;
1051
1052            case com.android.internal.R.styleable.TextView_shadowColor:
1053                shadowcolor = a.getInt(attr, 0);
1054                break;
1055
1056            case com.android.internal.R.styleable.TextView_shadowDx:
1057                dx = a.getFloat(attr, 0);
1058                break;
1059
1060            case com.android.internal.R.styleable.TextView_shadowDy:
1061                dy = a.getFloat(attr, 0);
1062                break;
1063
1064            case com.android.internal.R.styleable.TextView_shadowRadius:
1065                r = a.getFloat(attr, 0);
1066                break;
1067
1068            case com.android.internal.R.styleable.TextView_enabled:
1069                setEnabled(a.getBoolean(attr, isEnabled()));
1070                break;
1071
1072            case com.android.internal.R.styleable.TextView_textColorHighlight:
1073                textColorHighlight = a.getColor(attr, textColorHighlight);
1074                break;
1075
1076            case com.android.internal.R.styleable.TextView_textColor:
1077                textColor = a.getColorStateList(attr);
1078                break;
1079
1080            case com.android.internal.R.styleable.TextView_textColorHint:
1081                textColorHint = a.getColorStateList(attr);
1082                break;
1083
1084            case com.android.internal.R.styleable.TextView_textColorLink:
1085                textColorLink = a.getColorStateList(attr);
1086                break;
1087
1088            case com.android.internal.R.styleable.TextView_textSize:
1089                textSize = a.getDimensionPixelSize(attr, textSize);
1090                break;
1091
1092            case com.android.internal.R.styleable.TextView_typeface:
1093                typefaceIndex = a.getInt(attr, typefaceIndex);
1094                break;
1095
1096            case com.android.internal.R.styleable.TextView_textStyle:
1097                styleIndex = a.getInt(attr, styleIndex);
1098                break;
1099
1100            case com.android.internal.R.styleable.TextView_fontFamily:
1101                fontFamily = a.getString(attr);
1102                fontFamilyExplicit = true;
1103                break;
1104
1105            case com.android.internal.R.styleable.TextView_password:
1106                password = a.getBoolean(attr, password);
1107                break;
1108
1109            case com.android.internal.R.styleable.TextView_lineSpacingExtra:
1110                mSpacingAdd = a.getDimensionPixelSize(attr, (int) mSpacingAdd);
1111                break;
1112
1113            case com.android.internal.R.styleable.TextView_lineSpacingMultiplier:
1114                mSpacingMult = a.getFloat(attr, mSpacingMult);
1115                break;
1116
1117            case com.android.internal.R.styleable.TextView_inputType:
1118                inputType = a.getInt(attr, EditorInfo.TYPE_NULL);
1119                break;
1120
1121            case com.android.internal.R.styleable.TextView_allowUndo:
1122                createEditorIfNeeded();
1123                mEditor.mAllowUndo = a.getBoolean(attr, true);
1124                break;
1125
1126            case com.android.internal.R.styleable.TextView_imeOptions:
1127                createEditorIfNeeded();
1128                mEditor.createInputContentTypeIfNeeded();
1129                mEditor.mInputContentType.imeOptions = a.getInt(attr,
1130                        mEditor.mInputContentType.imeOptions);
1131                break;
1132
1133            case com.android.internal.R.styleable.TextView_imeActionLabel:
1134                createEditorIfNeeded();
1135                mEditor.createInputContentTypeIfNeeded();
1136                mEditor.mInputContentType.imeActionLabel = a.getText(attr);
1137                break;
1138
1139            case com.android.internal.R.styleable.TextView_imeActionId:
1140                createEditorIfNeeded();
1141                mEditor.createInputContentTypeIfNeeded();
1142                mEditor.mInputContentType.imeActionId = a.getInt(attr,
1143                        mEditor.mInputContentType.imeActionId);
1144                break;
1145
1146            case com.android.internal.R.styleable.TextView_privateImeOptions:
1147                setPrivateImeOptions(a.getString(attr));
1148                break;
1149
1150            case com.android.internal.R.styleable.TextView_editorExtras:
1151                try {
1152                    setInputExtras(a.getResourceId(attr, 0));
1153                } catch (XmlPullParserException e) {
1154                    Log.w(LOG_TAG, "Failure reading input extras", e);
1155                } catch (IOException e) {
1156                    Log.w(LOG_TAG, "Failure reading input extras", e);
1157                }
1158                break;
1159
1160            case com.android.internal.R.styleable.TextView_textCursorDrawable:
1161                mCursorDrawableRes = a.getResourceId(attr, 0);
1162                break;
1163
1164            case com.android.internal.R.styleable.TextView_textSelectHandleLeft:
1165                mTextSelectHandleLeftRes = a.getResourceId(attr, 0);
1166                break;
1167
1168            case com.android.internal.R.styleable.TextView_textSelectHandleRight:
1169                mTextSelectHandleRightRes = a.getResourceId(attr, 0);
1170                break;
1171
1172            case com.android.internal.R.styleable.TextView_textSelectHandle:
1173                mTextSelectHandleRes = a.getResourceId(attr, 0);
1174                break;
1175
1176            case com.android.internal.R.styleable.TextView_textEditSuggestionItemLayout:
1177                mTextEditSuggestionItemLayout = a.getResourceId(attr, 0);
1178                break;
1179
1180            case com.android.internal.R.styleable.TextView_textEditSuggestionContainerLayout:
1181                mTextEditSuggestionContainerLayout = a.getResourceId(attr, 0);
1182                break;
1183
1184            case com.android.internal.R.styleable.TextView_textEditSuggestionHighlightStyle:
1185                mTextEditSuggestionHighlightStyle = a.getResourceId(attr, 0);
1186                break;
1187
1188            case com.android.internal.R.styleable.TextView_textIsSelectable:
1189                setTextIsSelectable(a.getBoolean(attr, false));
1190                break;
1191
1192            case com.android.internal.R.styleable.TextView_textAllCaps:
1193                allCaps = a.getBoolean(attr, false);
1194                break;
1195
1196            case com.android.internal.R.styleable.TextView_elegantTextHeight:
1197                elegant = a.getBoolean(attr, false);
1198                break;
1199
1200            case com.android.internal.R.styleable.TextView_letterSpacing:
1201                letterSpacing = a.getFloat(attr, 0);
1202                break;
1203
1204            case com.android.internal.R.styleable.TextView_fontFeatureSettings:
1205                fontFeatureSettings = a.getString(attr);
1206                break;
1207
1208            case com.android.internal.R.styleable.TextView_breakStrategy:
1209                mBreakStrategy = a.getInt(attr, Layout.BREAK_STRATEGY_SIMPLE);
1210                break;
1211
1212            case com.android.internal.R.styleable.TextView_hyphenationFrequency:
1213                mHyphenationFrequency = a.getInt(attr, Layout.HYPHENATION_FREQUENCY_NONE);
1214                break;
1215            }
1216        }
1217        a.recycle();
1218
1219        BufferType bufferType = BufferType.EDITABLE;
1220
1221        final int variation =
1222                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
1223        final boolean passwordInputType = variation
1224                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD);
1225        final boolean webPasswordInputType = variation
1226                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD);
1227        final boolean numberPasswordInputType = variation
1228                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
1229
1230        if (inputMethod != null) {
1231            Class<?> c;
1232
1233            try {
1234                c = Class.forName(inputMethod.toString());
1235            } catch (ClassNotFoundException ex) {
1236                throw new RuntimeException(ex);
1237            }
1238
1239            try {
1240                createEditorIfNeeded();
1241                mEditor.mKeyListener = (KeyListener) c.newInstance();
1242            } catch (InstantiationException ex) {
1243                throw new RuntimeException(ex);
1244            } catch (IllegalAccessException ex) {
1245                throw new RuntimeException(ex);
1246            }
1247            try {
1248                mEditor.mInputType = inputType != EditorInfo.TYPE_NULL
1249                        ? inputType
1250                        : mEditor.mKeyListener.getInputType();
1251            } catch (IncompatibleClassChangeError e) {
1252                mEditor.mInputType = EditorInfo.TYPE_CLASS_TEXT;
1253            }
1254        } else if (digits != null) {
1255            createEditorIfNeeded();
1256            mEditor.mKeyListener = DigitsKeyListener.getInstance(digits.toString());
1257            // If no input type was specified, we will default to generic
1258            // text, since we can't tell the IME about the set of digits
1259            // that was selected.
1260            mEditor.mInputType = inputType != EditorInfo.TYPE_NULL
1261                    ? inputType : EditorInfo.TYPE_CLASS_TEXT;
1262        } else if (inputType != EditorInfo.TYPE_NULL) {
1263            setInputType(inputType, true);
1264            // If set, the input type overrides what was set using the deprecated singleLine flag.
1265            singleLine = !isMultilineInputType(inputType);
1266        } else if (phone) {
1267            createEditorIfNeeded();
1268            mEditor.mKeyListener = DialerKeyListener.getInstance();
1269            mEditor.mInputType = inputType = EditorInfo.TYPE_CLASS_PHONE;
1270        } else if (numeric != 0) {
1271            createEditorIfNeeded();
1272            mEditor.mKeyListener = DigitsKeyListener.getInstance((numeric & SIGNED) != 0,
1273                                                   (numeric & DECIMAL) != 0);
1274            inputType = EditorInfo.TYPE_CLASS_NUMBER;
1275            if ((numeric & SIGNED) != 0) {
1276                inputType |= EditorInfo.TYPE_NUMBER_FLAG_SIGNED;
1277            }
1278            if ((numeric & DECIMAL) != 0) {
1279                inputType |= EditorInfo.TYPE_NUMBER_FLAG_DECIMAL;
1280            }
1281            mEditor.mInputType = inputType;
1282        } else if (autotext || autocap != -1) {
1283            TextKeyListener.Capitalize cap;
1284
1285            inputType = EditorInfo.TYPE_CLASS_TEXT;
1286
1287            switch (autocap) {
1288            case 1:
1289                cap = TextKeyListener.Capitalize.SENTENCES;
1290                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES;
1291                break;
1292
1293            case 2:
1294                cap = TextKeyListener.Capitalize.WORDS;
1295                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS;
1296                break;
1297
1298            case 3:
1299                cap = TextKeyListener.Capitalize.CHARACTERS;
1300                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS;
1301                break;
1302
1303            default:
1304                cap = TextKeyListener.Capitalize.NONE;
1305                break;
1306            }
1307
1308            createEditorIfNeeded();
1309            mEditor.mKeyListener = TextKeyListener.getInstance(autotext, cap);
1310            mEditor.mInputType = inputType;
1311        } else if (isTextSelectable()) {
1312            // Prevent text changes from keyboard.
1313            if (mEditor != null) {
1314                mEditor.mKeyListener = null;
1315                mEditor.mInputType = EditorInfo.TYPE_NULL;
1316            }
1317            bufferType = BufferType.SPANNABLE;
1318            // So that selection can be changed using arrow keys and touch is handled.
1319            setMovementMethod(ArrowKeyMovementMethod.getInstance());
1320        } else if (editable) {
1321            createEditorIfNeeded();
1322            mEditor.mKeyListener = TextKeyListener.getInstance();
1323            mEditor.mInputType = EditorInfo.TYPE_CLASS_TEXT;
1324        } else {
1325            if (mEditor != null) mEditor.mKeyListener = null;
1326
1327            switch (buffertype) {
1328                case 0:
1329                    bufferType = BufferType.NORMAL;
1330                    break;
1331                case 1:
1332                    bufferType = BufferType.SPANNABLE;
1333                    break;
1334                case 2:
1335                    bufferType = BufferType.EDITABLE;
1336                    break;
1337            }
1338        }
1339
1340        if (mEditor != null) mEditor.adjustInputType(password, passwordInputType,
1341                webPasswordInputType, numberPasswordInputType);
1342
1343        if (selectallonfocus) {
1344            createEditorIfNeeded();
1345            mEditor.mSelectAllOnFocus = true;
1346
1347            if (bufferType == BufferType.NORMAL)
1348                bufferType = BufferType.SPANNABLE;
1349        }
1350
1351        // Set up the tint (if needed) before setting the drawables so that it
1352        // gets applied correctly.
1353        if (drawableTint != null || drawableTintMode != null) {
1354            if (mDrawables == null) {
1355                mDrawables = new Drawables(context);
1356            }
1357            if (drawableTint != null) {
1358                mDrawables.mTintList = drawableTint;
1359                mDrawables.mHasTint = true;
1360            }
1361            if (drawableTintMode != null) {
1362                mDrawables.mTintMode = drawableTintMode;
1363                mDrawables.mHasTintMode = true;
1364            }
1365        }
1366
1367        // This call will save the initial left/right drawables
1368        setCompoundDrawablesWithIntrinsicBounds(
1369            drawableLeft, drawableTop, drawableRight, drawableBottom);
1370        setRelativeDrawablesIfNeeded(drawableStart, drawableEnd);
1371        setCompoundDrawablePadding(drawablePadding);
1372
1373        // Same as setSingleLine(), but make sure the transformation method and the maximum number
1374        // of lines of height are unchanged for multi-line TextViews.
1375        setInputTypeSingleLine(singleLine);
1376        applySingleLine(singleLine, singleLine, singleLine);
1377
1378        if (singleLine && getKeyListener() == null && ellipsize < 0) {
1379                ellipsize = 3; // END
1380        }
1381
1382        switch (ellipsize) {
1383            case 1:
1384                setEllipsize(TextUtils.TruncateAt.START);
1385                break;
1386            case 2:
1387                setEllipsize(TextUtils.TruncateAt.MIDDLE);
1388                break;
1389            case 3:
1390                setEllipsize(TextUtils.TruncateAt.END);
1391                break;
1392            case 4:
1393                if (ViewConfiguration.get(context).isFadingMarqueeEnabled()) {
1394                    setHorizontalFadingEdgeEnabled(true);
1395                    mMarqueeFadeMode = MARQUEE_FADE_NORMAL;
1396                } else {
1397                    setHorizontalFadingEdgeEnabled(false);
1398                    mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
1399                }
1400                setEllipsize(TextUtils.TruncateAt.MARQUEE);
1401                break;
1402        }
1403
1404        setTextColor(textColor != null ? textColor : ColorStateList.valueOf(0xFF000000));
1405        setHintTextColor(textColorHint);
1406        setLinkTextColor(textColorLink);
1407        if (textColorHighlight != 0) {
1408            setHighlightColor(textColorHighlight);
1409        }
1410        setRawTextSize(textSize);
1411        setElegantTextHeight(elegant);
1412        setLetterSpacing(letterSpacing);
1413        setFontFeatureSettings(fontFeatureSettings);
1414
1415        if (allCaps) {
1416            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
1417        }
1418
1419        if (password || passwordInputType || webPasswordInputType || numberPasswordInputType) {
1420            setTransformationMethod(PasswordTransformationMethod.getInstance());
1421            typefaceIndex = MONOSPACE;
1422        } else if (mEditor != null &&
1423                (mEditor.mInputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION))
1424                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)) {
1425            typefaceIndex = MONOSPACE;
1426        }
1427
1428        if (typefaceIndex != -1 && !fontFamilyExplicit) {
1429            fontFamily = null;
1430        }
1431        setTypefaceFromAttrs(fontFamily, typefaceIndex, styleIndex);
1432
1433        if (shadowcolor != 0) {
1434            setShadowLayer(r, dx, dy, shadowcolor);
1435        }
1436
1437        if (maxlength >= 0) {
1438            setFilters(new InputFilter[] { new InputFilter.LengthFilter(maxlength) });
1439        } else {
1440            setFilters(NO_FILTERS);
1441        }
1442
1443        setText(text, bufferType);
1444        if (hint != null) setHint(hint);
1445
1446        /*
1447         * Views are not normally focusable unless specified to be.
1448         * However, TextViews that have input or movement methods *are*
1449         * focusable by default.
1450         */
1451        a = context.obtainStyledAttributes(
1452                attrs, com.android.internal.R.styleable.View, defStyleAttr, defStyleRes);
1453
1454        boolean focusable = mMovement != null || getKeyListener() != null;
1455        boolean clickable = focusable || isClickable();
1456        boolean longClickable = focusable || isLongClickable();
1457
1458        n = a.getIndexCount();
1459        for (int i = 0; i < n; i++) {
1460            int attr = a.getIndex(i);
1461
1462            switch (attr) {
1463            case com.android.internal.R.styleable.View_focusable:
1464                focusable = a.getBoolean(attr, focusable);
1465                break;
1466
1467            case com.android.internal.R.styleable.View_clickable:
1468                clickable = a.getBoolean(attr, clickable);
1469                break;
1470
1471            case com.android.internal.R.styleable.View_longClickable:
1472                longClickable = a.getBoolean(attr, longClickable);
1473                break;
1474            }
1475        }
1476        a.recycle();
1477
1478        setFocusable(focusable);
1479        setClickable(clickable);
1480        setLongClickable(longClickable);
1481
1482        if (mEditor != null) mEditor.prepareCursorControllers();
1483
1484        // If not explicitly specified this view is important for accessibility.
1485        if (getImportantForAccessibility() == IMPORTANT_FOR_ACCESSIBILITY_AUTO) {
1486            setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_YES);
1487        }
1488    }
1489
1490    private int[] parseDimensionArray(TypedArray dimens) {
1491        if (dimens == null) {
1492            return null;
1493        }
1494        int[] result = new int[dimens.length()];
1495        for (int i = 0; i < result.length; i++) {
1496            result[i] = dimens.getDimensionPixelSize(i, 0);
1497        }
1498        return result;
1499    }
1500
1501    /**
1502     * @hide
1503     */
1504    @Override
1505    public void onActivityResult(int requestCode, int resultCode, Intent data) {
1506        if (requestCode == PROCESS_TEXT_REQUEST_CODE) {
1507            if (resultCode == Activity.RESULT_OK && data != null) {
1508                CharSequence result = data.getCharSequenceExtra(Intent.EXTRA_PROCESS_TEXT);
1509                if (result != null) {
1510                    if (isTextEditable()) {
1511                        replaceSelectionWithText(result);
1512                    } else {
1513                        if (result.length() > 0) {
1514                            Toast.makeText(getContext(), String.valueOf(result), Toast.LENGTH_LONG)
1515                                .show();
1516                        }
1517                    }
1518                }
1519            } else if (mText instanceof Spannable) {
1520                // Reset the selection.
1521                stopTextActionMode();
1522                Selection.setSelection((Spannable) mText, getSelectionStart(), getSelectionEnd());
1523            }
1524
1525            if (mEditor.hasSelectionController()) {
1526                mEditor.startSelectionActionMode();
1527            }
1528        }
1529    }
1530
1531    private void setTypefaceFromAttrs(String familyName, int typefaceIndex, int styleIndex) {
1532        Typeface tf = null;
1533        if (familyName != null) {
1534            tf = Typeface.create(familyName, styleIndex);
1535            if (tf != null) {
1536                setTypeface(tf);
1537                return;
1538            }
1539        }
1540        switch (typefaceIndex) {
1541            case SANS:
1542                tf = Typeface.SANS_SERIF;
1543                break;
1544
1545            case SERIF:
1546                tf = Typeface.SERIF;
1547                break;
1548
1549            case MONOSPACE:
1550                tf = Typeface.MONOSPACE;
1551                break;
1552        }
1553
1554        setTypeface(tf, styleIndex);
1555    }
1556
1557    private void setRelativeDrawablesIfNeeded(Drawable start, Drawable end) {
1558        boolean hasRelativeDrawables = (start != null) || (end != null);
1559        if (hasRelativeDrawables) {
1560            Drawables dr = mDrawables;
1561            if (dr == null) {
1562                mDrawables = dr = new Drawables(getContext());
1563            }
1564            mDrawables.mOverride = true;
1565            final Rect compoundRect = dr.mCompoundRect;
1566            int[] state = getDrawableState();
1567            if (start != null) {
1568                start.setBounds(0, 0, start.getIntrinsicWidth(), start.getIntrinsicHeight());
1569                start.setState(state);
1570                start.copyBounds(compoundRect);
1571                start.setCallback(this);
1572
1573                dr.mDrawableStart = start;
1574                dr.mDrawableSizeStart = compoundRect.width();
1575                dr.mDrawableHeightStart = compoundRect.height();
1576            } else {
1577                dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1578            }
1579            if (end != null) {
1580                end.setBounds(0, 0, end.getIntrinsicWidth(), end.getIntrinsicHeight());
1581                end.setState(state);
1582                end.copyBounds(compoundRect);
1583                end.setCallback(this);
1584
1585                dr.mDrawableEnd = end;
1586                dr.mDrawableSizeEnd = compoundRect.width();
1587                dr.mDrawableHeightEnd = compoundRect.height();
1588            } else {
1589                dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1590            }
1591            resetResolvedDrawables();
1592            resolveDrawables();
1593            applyCompoundDrawableTint();
1594        }
1595    }
1596
1597    @Override
1598    public void setEnabled(boolean enabled) {
1599        if (enabled == isEnabled()) {
1600            return;
1601        }
1602
1603        if (!enabled) {
1604            // Hide the soft input if the currently active TextView is disabled
1605            InputMethodManager imm = InputMethodManager.peekInstance();
1606            if (imm != null && imm.isActive(this)) {
1607                imm.hideSoftInputFromWindow(getWindowToken(), 0);
1608            }
1609        }
1610
1611        super.setEnabled(enabled);
1612
1613        if (enabled) {
1614            // Make sure IME is updated with current editor info.
1615            InputMethodManager imm = InputMethodManager.peekInstance();
1616            if (imm != null) imm.restartInput(this);
1617        }
1618
1619        // Will change text color
1620        if (mEditor != null) {
1621            mEditor.invalidateTextDisplayList();
1622            mEditor.prepareCursorControllers();
1623
1624            // start or stop the cursor blinking as appropriate
1625            mEditor.makeBlink();
1626        }
1627    }
1628
1629    /**
1630     * Sets the typeface and style in which the text should be displayed,
1631     * and turns on the fake bold and italic bits in the Paint if the
1632     * Typeface that you provided does not have all the bits in the
1633     * style that you specified.
1634     *
1635     * @attr ref android.R.styleable#TextView_typeface
1636     * @attr ref android.R.styleable#TextView_textStyle
1637     */
1638    public void setTypeface(Typeface tf, int style) {
1639        if (style > 0) {
1640            if (tf == null) {
1641                tf = Typeface.defaultFromStyle(style);
1642            } else {
1643                tf = Typeface.create(tf, style);
1644            }
1645
1646            setTypeface(tf);
1647            // now compute what (if any) algorithmic styling is needed
1648            int typefaceStyle = tf != null ? tf.getStyle() : 0;
1649            int need = style & ~typefaceStyle;
1650            mTextPaint.setFakeBoldText((need & Typeface.BOLD) != 0);
1651            mTextPaint.setTextSkewX((need & Typeface.ITALIC) != 0 ? -0.25f : 0);
1652        } else {
1653            mTextPaint.setFakeBoldText(false);
1654            mTextPaint.setTextSkewX(0);
1655            setTypeface(tf);
1656        }
1657    }
1658
1659    /**
1660     * Subclasses override this to specify that they have a KeyListener
1661     * by default even if not specifically called for in the XML options.
1662     */
1663    protected boolean getDefaultEditable() {
1664        return false;
1665    }
1666
1667    /**
1668     * Subclasses override this to specify a default movement method.
1669     */
1670    protected MovementMethod getDefaultMovementMethod() {
1671        return null;
1672    }
1673
1674    /**
1675     * Return the text the TextView is displaying. If setText() was called with
1676     * an argument of BufferType.SPANNABLE or BufferType.EDITABLE, you can cast
1677     * the return value from this method to Spannable or Editable, respectively.
1678     *
1679     * Note: The content of the return value should not be modified. If you want
1680     * a modifiable one, you should make your own copy first.
1681     *
1682     * @attr ref android.R.styleable#TextView_text
1683     */
1684    @ViewDebug.CapturedViewProperty
1685    public CharSequence getText() {
1686        return mText;
1687    }
1688
1689    /**
1690     * Returns the length, in characters, of the text managed by this TextView
1691     */
1692    public int length() {
1693        return mText.length();
1694    }
1695
1696    /**
1697     * Return the text the TextView is displaying as an Editable object.  If
1698     * the text is not editable, null is returned.
1699     *
1700     * @see #getText
1701     */
1702    public Editable getEditableText() {
1703        return (mText instanceof Editable) ? (Editable)mText : null;
1704    }
1705
1706    /**
1707     * @return the height of one standard line in pixels.  Note that markup
1708     * within the text can cause individual lines to be taller or shorter
1709     * than this height, and the layout may contain additional first-
1710     * or last-line padding.
1711     */
1712    public int getLineHeight() {
1713        return FastMath.round(mTextPaint.getFontMetricsInt(null) * mSpacingMult + mSpacingAdd);
1714    }
1715
1716    /**
1717     * @return the Layout that is currently being used to display the text.
1718     * This can be null if the text or width has recently changes.
1719     */
1720    public final Layout getLayout() {
1721        return mLayout;
1722    }
1723
1724    /**
1725     * @return the Layout that is currently being used to display the hint text.
1726     * This can be null.
1727     */
1728    final Layout getHintLayout() {
1729        return mHintLayout;
1730    }
1731
1732    /**
1733     * Retrieve the {@link android.content.UndoManager} that is currently associated
1734     * with this TextView.  By default there is no associated UndoManager, so null
1735     * is returned.  One can be associated with the TextView through
1736     * {@link #setUndoManager(android.content.UndoManager, String)}
1737     *
1738     * @hide
1739     */
1740    public final UndoManager getUndoManager() {
1741        // TODO: Consider supporting a global undo manager.
1742        throw new UnsupportedOperationException("not implemented");
1743    }
1744
1745
1746    /**
1747     * @hide
1748     */
1749    @VisibleForTesting
1750    public final Editor getEditorForTesting() {
1751        return mEditor;
1752    }
1753
1754    /**
1755     * Associate an {@link android.content.UndoManager} with this TextView.  Once
1756     * done, all edit operations on the TextView will result in appropriate
1757     * {@link android.content.UndoOperation} objects pushed on the given UndoManager's
1758     * stack.
1759     *
1760     * @param undoManager The {@link android.content.UndoManager} to associate with
1761     * this TextView, or null to clear any existing association.
1762     * @param tag String tag identifying this particular TextView owner in the
1763     * UndoManager.  This is used to keep the correct association with the
1764     * {@link android.content.UndoOwner} of any operations inside of the UndoManager.
1765     *
1766     * @hide
1767     */
1768    public final void setUndoManager(UndoManager undoManager, String tag) {
1769        // TODO: Consider supporting a global undo manager. An implementation will need to:
1770        // * createEditorIfNeeded()
1771        // * Promote to BufferType.EDITABLE if needed.
1772        // * Update the UndoManager and UndoOwner.
1773        // Likewise it will need to be able to restore the default UndoManager.
1774        throw new UnsupportedOperationException("not implemented");
1775    }
1776
1777    /**
1778     * @return the current key listener for this TextView.
1779     * This will frequently be null for non-EditText TextViews.
1780     *
1781     * @attr ref android.R.styleable#TextView_numeric
1782     * @attr ref android.R.styleable#TextView_digits
1783     * @attr ref android.R.styleable#TextView_phoneNumber
1784     * @attr ref android.R.styleable#TextView_inputMethod
1785     * @attr ref android.R.styleable#TextView_capitalize
1786     * @attr ref android.R.styleable#TextView_autoText
1787     */
1788    public final KeyListener getKeyListener() {
1789        return mEditor == null ? null : mEditor.mKeyListener;
1790    }
1791
1792    /**
1793     * Sets the key listener to be used with this TextView.  This can be null
1794     * to disallow user input.  Note that this method has significant and
1795     * subtle interactions with soft keyboards and other input method:
1796     * see {@link KeyListener#getInputType() KeyListener.getContentType()}
1797     * for important details.  Calling this method will replace the current
1798     * content type of the text view with the content type returned by the
1799     * key listener.
1800     * <p>
1801     * Be warned that if you want a TextView with a key listener or movement
1802     * method not to be focusable, or if you want a TextView without a
1803     * key listener or movement method to be focusable, you must call
1804     * {@link #setFocusable} again after calling this to get the focusability
1805     * back the way you want it.
1806     *
1807     * @attr ref android.R.styleable#TextView_numeric
1808     * @attr ref android.R.styleable#TextView_digits
1809     * @attr ref android.R.styleable#TextView_phoneNumber
1810     * @attr ref android.R.styleable#TextView_inputMethod
1811     * @attr ref android.R.styleable#TextView_capitalize
1812     * @attr ref android.R.styleable#TextView_autoText
1813     */
1814    public void setKeyListener(KeyListener input) {
1815        setKeyListenerOnly(input);
1816        fixFocusableAndClickableSettings();
1817
1818        if (input != null) {
1819            createEditorIfNeeded();
1820            try {
1821                mEditor.mInputType = mEditor.mKeyListener.getInputType();
1822            } catch (IncompatibleClassChangeError e) {
1823                mEditor.mInputType = EditorInfo.TYPE_CLASS_TEXT;
1824            }
1825            // Change inputType, without affecting transformation.
1826            // No need to applySingleLine since mSingleLine is unchanged.
1827            setInputTypeSingleLine(mSingleLine);
1828        } else {
1829            if (mEditor != null) mEditor.mInputType = EditorInfo.TYPE_NULL;
1830        }
1831
1832        InputMethodManager imm = InputMethodManager.peekInstance();
1833        if (imm != null) imm.restartInput(this);
1834    }
1835
1836    private void setKeyListenerOnly(KeyListener input) {
1837        if (mEditor == null && input == null) return; // null is the default value
1838
1839        createEditorIfNeeded();
1840        if (mEditor.mKeyListener != input) {
1841            mEditor.mKeyListener = input;
1842            if (input != null && !(mText instanceof Editable)) {
1843                setText(mText);
1844            }
1845
1846            setFilters((Editable) mText, mFilters);
1847        }
1848    }
1849
1850    /**
1851     * @return the movement method being used for this TextView.
1852     * This will frequently be null for non-EditText TextViews.
1853     */
1854    public final MovementMethod getMovementMethod() {
1855        return mMovement;
1856    }
1857
1858    /**
1859     * Sets the movement method (arrow key handler) to be used for
1860     * this TextView.  This can be null to disallow using the arrow keys
1861     * to move the cursor or scroll the view.
1862     * <p>
1863     * Be warned that if you want a TextView with a key listener or movement
1864     * method not to be focusable, or if you want a TextView without a
1865     * key listener or movement method to be focusable, you must call
1866     * {@link #setFocusable} again after calling this to get the focusability
1867     * back the way you want it.
1868     */
1869    public final void setMovementMethod(MovementMethod movement) {
1870        if (mMovement != movement) {
1871            mMovement = movement;
1872
1873            if (movement != null && !(mText instanceof Spannable)) {
1874                setText(mText);
1875            }
1876
1877            fixFocusableAndClickableSettings();
1878
1879            // SelectionModifierCursorController depends on textCanBeSelected, which depends on
1880            // mMovement
1881            if (mEditor != null) mEditor.prepareCursorControllers();
1882        }
1883    }
1884
1885    private void fixFocusableAndClickableSettings() {
1886        if (mMovement != null || (mEditor != null && mEditor.mKeyListener != null)) {
1887            setFocusable(true);
1888            setClickable(true);
1889            setLongClickable(true);
1890        } else {
1891            setFocusable(false);
1892            setClickable(false);
1893            setLongClickable(false);
1894        }
1895    }
1896
1897    /**
1898     * @return the current transformation method for this TextView.
1899     * This will frequently be null except for single-line and password
1900     * fields.
1901     *
1902     * @attr ref android.R.styleable#TextView_password
1903     * @attr ref android.R.styleable#TextView_singleLine
1904     */
1905    public final TransformationMethod getTransformationMethod() {
1906        return mTransformation;
1907    }
1908
1909    /**
1910     * Sets the transformation that is applied to the text that this
1911     * TextView is displaying.
1912     *
1913     * @attr ref android.R.styleable#TextView_password
1914     * @attr ref android.R.styleable#TextView_singleLine
1915     */
1916    public final void setTransformationMethod(TransformationMethod method) {
1917        if (method == mTransformation) {
1918            // Avoid the setText() below if the transformation is
1919            // the same.
1920            return;
1921        }
1922        if (mTransformation != null) {
1923            if (mText instanceof Spannable) {
1924                ((Spannable) mText).removeSpan(mTransformation);
1925            }
1926        }
1927
1928        mTransformation = method;
1929
1930        if (method instanceof TransformationMethod2) {
1931            TransformationMethod2 method2 = (TransformationMethod2) method;
1932            mAllowTransformationLengthChange = !isTextSelectable() && !(mText instanceof Editable);
1933            method2.setLengthChangesAllowed(mAllowTransformationLengthChange);
1934        } else {
1935            mAllowTransformationLengthChange = false;
1936        }
1937
1938        setText(mText);
1939
1940        if (hasPasswordTransformationMethod()) {
1941            notifyViewAccessibilityStateChangedIfNeeded(
1942                    AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED);
1943        }
1944    }
1945
1946    /**
1947     * Returns the top padding of the view, plus space for the top
1948     * Drawable if any.
1949     */
1950    public int getCompoundPaddingTop() {
1951        final Drawables dr = mDrawables;
1952        if (dr == null || dr.mShowing[Drawables.TOP] == null) {
1953            return mPaddingTop;
1954        } else {
1955            return mPaddingTop + dr.mDrawablePadding + dr.mDrawableSizeTop;
1956        }
1957    }
1958
1959    /**
1960     * Returns the bottom padding of the view, plus space for the bottom
1961     * Drawable if any.
1962     */
1963    public int getCompoundPaddingBottom() {
1964        final Drawables dr = mDrawables;
1965        if (dr == null || dr.mShowing[Drawables.BOTTOM] == null) {
1966            return mPaddingBottom;
1967        } else {
1968            return mPaddingBottom + dr.mDrawablePadding + dr.mDrawableSizeBottom;
1969        }
1970    }
1971
1972    /**
1973     * Returns the left padding of the view, plus space for the left
1974     * Drawable if any.
1975     */
1976    public int getCompoundPaddingLeft() {
1977        final Drawables dr = mDrawables;
1978        if (dr == null || dr.mShowing[Drawables.LEFT] == null) {
1979            return mPaddingLeft;
1980        } else {
1981            return mPaddingLeft + dr.mDrawablePadding + dr.mDrawableSizeLeft;
1982        }
1983    }
1984
1985    /**
1986     * Returns the right padding of the view, plus space for the right
1987     * Drawable if any.
1988     */
1989    public int getCompoundPaddingRight() {
1990        final Drawables dr = mDrawables;
1991        if (dr == null || dr.mShowing[Drawables.RIGHT] == null) {
1992            return mPaddingRight;
1993        } else {
1994            return mPaddingRight + dr.mDrawablePadding + dr.mDrawableSizeRight;
1995        }
1996    }
1997
1998    /**
1999     * Returns the start padding of the view, plus space for the start
2000     * Drawable if any.
2001     */
2002    public int getCompoundPaddingStart() {
2003        resolveDrawables();
2004        switch(getLayoutDirection()) {
2005            default:
2006            case LAYOUT_DIRECTION_LTR:
2007                return getCompoundPaddingLeft();
2008            case LAYOUT_DIRECTION_RTL:
2009                return getCompoundPaddingRight();
2010        }
2011    }
2012
2013    /**
2014     * Returns the end padding of the view, plus space for the end
2015     * Drawable if any.
2016     */
2017    public int getCompoundPaddingEnd() {
2018        resolveDrawables();
2019        switch(getLayoutDirection()) {
2020            default:
2021            case LAYOUT_DIRECTION_LTR:
2022                return getCompoundPaddingRight();
2023            case LAYOUT_DIRECTION_RTL:
2024                return getCompoundPaddingLeft();
2025        }
2026    }
2027
2028    /**
2029     * Returns the extended top padding of the view, including both the
2030     * top Drawable if any and any extra space to keep more than maxLines
2031     * of text from showing.  It is only valid to call this after measuring.
2032     */
2033    public int getExtendedPaddingTop() {
2034        if (mMaxMode != LINES) {
2035            return getCompoundPaddingTop();
2036        }
2037
2038        if (mLayout == null) {
2039            assumeLayout();
2040        }
2041
2042        if (mLayout.getLineCount() <= mMaximum) {
2043            return getCompoundPaddingTop();
2044        }
2045
2046        int top = getCompoundPaddingTop();
2047        int bottom = getCompoundPaddingBottom();
2048        int viewht = getHeight() - top - bottom;
2049        int layoutht = mLayout.getLineTop(mMaximum);
2050
2051        if (layoutht >= viewht) {
2052            return top;
2053        }
2054
2055        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
2056        if (gravity == Gravity.TOP) {
2057            return top;
2058        } else if (gravity == Gravity.BOTTOM) {
2059            return top + viewht - layoutht;
2060        } else { // (gravity == Gravity.CENTER_VERTICAL)
2061            return top + (viewht - layoutht) / 2;
2062        }
2063    }
2064
2065    /**
2066     * Returns the extended bottom padding of the view, including both the
2067     * bottom Drawable if any and any extra space to keep more than maxLines
2068     * of text from showing.  It is only valid to call this after measuring.
2069     */
2070    public int getExtendedPaddingBottom() {
2071        if (mMaxMode != LINES) {
2072            return getCompoundPaddingBottom();
2073        }
2074
2075        if (mLayout == null) {
2076            assumeLayout();
2077        }
2078
2079        if (mLayout.getLineCount() <= mMaximum) {
2080            return getCompoundPaddingBottom();
2081        }
2082
2083        int top = getCompoundPaddingTop();
2084        int bottom = getCompoundPaddingBottom();
2085        int viewht = getHeight() - top - bottom;
2086        int layoutht = mLayout.getLineTop(mMaximum);
2087
2088        if (layoutht >= viewht) {
2089            return bottom;
2090        }
2091
2092        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
2093        if (gravity == Gravity.TOP) {
2094            return bottom + viewht - layoutht;
2095        } else if (gravity == Gravity.BOTTOM) {
2096            return bottom;
2097        } else { // (gravity == Gravity.CENTER_VERTICAL)
2098            return bottom + (viewht - layoutht) / 2;
2099        }
2100    }
2101
2102    /**
2103     * Returns the total left padding of the view, including the left
2104     * Drawable if any.
2105     */
2106    public int getTotalPaddingLeft() {
2107        return getCompoundPaddingLeft();
2108    }
2109
2110    /**
2111     * Returns the total right padding of the view, including the right
2112     * Drawable if any.
2113     */
2114    public int getTotalPaddingRight() {
2115        return getCompoundPaddingRight();
2116    }
2117
2118    /**
2119     * Returns the total start padding of the view, including the start
2120     * Drawable if any.
2121     */
2122    public int getTotalPaddingStart() {
2123        return getCompoundPaddingStart();
2124    }
2125
2126    /**
2127     * Returns the total end padding of the view, including the end
2128     * Drawable if any.
2129     */
2130    public int getTotalPaddingEnd() {
2131        return getCompoundPaddingEnd();
2132    }
2133
2134    /**
2135     * Returns the total top padding of the view, including the top
2136     * Drawable if any, the extra space to keep more than maxLines
2137     * from showing, and the vertical offset for gravity, if any.
2138     */
2139    public int getTotalPaddingTop() {
2140        return getExtendedPaddingTop() + getVerticalOffset(true);
2141    }
2142
2143    /**
2144     * Returns the total bottom padding of the view, including the bottom
2145     * Drawable if any, the extra space to keep more than maxLines
2146     * from showing, and the vertical offset for gravity, if any.
2147     */
2148    public int getTotalPaddingBottom() {
2149        return getExtendedPaddingBottom() + getBottomVerticalOffset(true);
2150    }
2151
2152    /**
2153     * Sets the Drawables (if any) to appear to the left of, above, to the
2154     * right of, and below the text. Use {@code null} if you do not want a
2155     * Drawable there. The Drawables must already have had
2156     * {@link Drawable#setBounds} called.
2157     * <p>
2158     * Calling this method will overwrite any Drawables previously set using
2159     * {@link #setCompoundDrawablesRelative} or related methods.
2160     *
2161     * @attr ref android.R.styleable#TextView_drawableLeft
2162     * @attr ref android.R.styleable#TextView_drawableTop
2163     * @attr ref android.R.styleable#TextView_drawableRight
2164     * @attr ref android.R.styleable#TextView_drawableBottom
2165     */
2166    public void setCompoundDrawables(@Nullable Drawable left, @Nullable Drawable top,
2167            @Nullable Drawable right, @Nullable Drawable bottom) {
2168        Drawables dr = mDrawables;
2169
2170        // We're switching to absolute, discard relative.
2171        if (dr != null) {
2172            if (dr.mDrawableStart != null) dr.mDrawableStart.setCallback(null);
2173            dr.mDrawableStart = null;
2174            if (dr.mDrawableEnd != null) dr.mDrawableEnd.setCallback(null);
2175            dr.mDrawableEnd = null;
2176            dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
2177            dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
2178        }
2179
2180        final boolean drawables = left != null || top != null || right != null || bottom != null;
2181        if (!drawables) {
2182            // Clearing drawables...  can we free the data structure?
2183            if (dr != null) {
2184                if (!dr.hasMetadata()) {
2185                    mDrawables = null;
2186                } else {
2187                    // We need to retain the last set padding, so just clear
2188                    // out all of the fields in the existing structure.
2189                    for (int i = dr.mShowing.length - 1; i >= 0; i--) {
2190                        if (dr.mShowing[i] != null) {
2191                            dr.mShowing[i].setCallback(null);
2192                        }
2193                        dr.mShowing[i] = null;
2194                    }
2195                    dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
2196                    dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
2197                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
2198                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
2199                }
2200            }
2201        } else {
2202            if (dr == null) {
2203                mDrawables = dr = new Drawables(getContext());
2204            }
2205
2206            mDrawables.mOverride = false;
2207
2208            if (dr.mShowing[Drawables.LEFT] != left && dr.mShowing[Drawables.LEFT] != null) {
2209                dr.mShowing[Drawables.LEFT].setCallback(null);
2210            }
2211            dr.mShowing[Drawables.LEFT] = left;
2212
2213            if (dr.mShowing[Drawables.TOP] != top && dr.mShowing[Drawables.TOP] != null) {
2214                dr.mShowing[Drawables.TOP].setCallback(null);
2215            }
2216            dr.mShowing[Drawables.TOP] = top;
2217
2218            if (dr.mShowing[Drawables.RIGHT] != right && dr.mShowing[Drawables.RIGHT] != null) {
2219                dr.mShowing[Drawables.RIGHT].setCallback(null);
2220            }
2221            dr.mShowing[Drawables.RIGHT] = right;
2222
2223            if (dr.mShowing[Drawables.BOTTOM] != bottom && dr.mShowing[Drawables.BOTTOM] != null) {
2224                dr.mShowing[Drawables.BOTTOM].setCallback(null);
2225            }
2226            dr.mShowing[Drawables.BOTTOM] = bottom;
2227
2228            final Rect compoundRect = dr.mCompoundRect;
2229            int[] state;
2230
2231            state = getDrawableState();
2232
2233            if (left != null) {
2234                left.setState(state);
2235                left.copyBounds(compoundRect);
2236                left.setCallback(this);
2237                dr.mDrawableSizeLeft = compoundRect.width();
2238                dr.mDrawableHeightLeft = compoundRect.height();
2239            } else {
2240                dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
2241            }
2242
2243            if (right != null) {
2244                right.setState(state);
2245                right.copyBounds(compoundRect);
2246                right.setCallback(this);
2247                dr.mDrawableSizeRight = compoundRect.width();
2248                dr.mDrawableHeightRight = compoundRect.height();
2249            } else {
2250                dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
2251            }
2252
2253            if (top != null) {
2254                top.setState(state);
2255                top.copyBounds(compoundRect);
2256                top.setCallback(this);
2257                dr.mDrawableSizeTop = compoundRect.height();
2258                dr.mDrawableWidthTop = compoundRect.width();
2259            } else {
2260                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
2261            }
2262
2263            if (bottom != null) {
2264                bottom.setState(state);
2265                bottom.copyBounds(compoundRect);
2266                bottom.setCallback(this);
2267                dr.mDrawableSizeBottom = compoundRect.height();
2268                dr.mDrawableWidthBottom = compoundRect.width();
2269            } else {
2270                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
2271            }
2272        }
2273
2274        // Save initial left/right drawables
2275        if (dr != null) {
2276            dr.mDrawableLeftInitial = left;
2277            dr.mDrawableRightInitial = right;
2278        }
2279
2280        resetResolvedDrawables();
2281        resolveDrawables();
2282        applyCompoundDrawableTint();
2283        invalidate();
2284        requestLayout();
2285    }
2286
2287    /**
2288     * Sets the Drawables (if any) to appear to the left of, above, to the
2289     * right of, and below the text. Use 0 if you do not want a Drawable there.
2290     * The Drawables' bounds will be set to their intrinsic bounds.
2291     * <p>
2292     * Calling this method will overwrite any Drawables previously set using
2293     * {@link #setCompoundDrawablesRelative} or related methods.
2294     *
2295     * @param left Resource identifier of the left Drawable.
2296     * @param top Resource identifier of the top Drawable.
2297     * @param right Resource identifier of the right Drawable.
2298     * @param bottom Resource identifier of the bottom Drawable.
2299     *
2300     * @attr ref android.R.styleable#TextView_drawableLeft
2301     * @attr ref android.R.styleable#TextView_drawableTop
2302     * @attr ref android.R.styleable#TextView_drawableRight
2303     * @attr ref android.R.styleable#TextView_drawableBottom
2304     */
2305    @android.view.RemotableViewMethod
2306    public void setCompoundDrawablesWithIntrinsicBounds(@DrawableRes int left,
2307            @DrawableRes int top, @DrawableRes int right, @DrawableRes int bottom) {
2308        final Context context = getContext();
2309        setCompoundDrawablesWithIntrinsicBounds(left != 0 ? context.getDrawable(left) : null,
2310                top != 0 ? context.getDrawable(top) : null,
2311                right != 0 ? context.getDrawable(right) : null,
2312                bottom != 0 ? context.getDrawable(bottom) : null);
2313    }
2314
2315    /**
2316     * Sets the Drawables (if any) to appear to the left of, above, to the
2317     * right of, and below the text. Use {@code null} if you do not want a
2318     * Drawable there. The Drawables' bounds will be set to their intrinsic
2319     * bounds.
2320     * <p>
2321     * Calling this method will overwrite any Drawables previously set using
2322     * {@link #setCompoundDrawablesRelative} or related methods.
2323     *
2324     * @attr ref android.R.styleable#TextView_drawableLeft
2325     * @attr ref android.R.styleable#TextView_drawableTop
2326     * @attr ref android.R.styleable#TextView_drawableRight
2327     * @attr ref android.R.styleable#TextView_drawableBottom
2328     */
2329    @android.view.RemotableViewMethod
2330    public void setCompoundDrawablesWithIntrinsicBounds(@Nullable Drawable left,
2331            @Nullable Drawable top, @Nullable Drawable right, @Nullable Drawable bottom) {
2332
2333        if (left != null) {
2334            left.setBounds(0, 0, left.getIntrinsicWidth(), left.getIntrinsicHeight());
2335        }
2336        if (right != null) {
2337            right.setBounds(0, 0, right.getIntrinsicWidth(), right.getIntrinsicHeight());
2338        }
2339        if (top != null) {
2340            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
2341        }
2342        if (bottom != null) {
2343            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
2344        }
2345        setCompoundDrawables(left, top, right, bottom);
2346    }
2347
2348    /**
2349     * Sets the Drawables (if any) to appear to the start of, above, to the end
2350     * of, and below the text. Use {@code null} if you do not want a Drawable
2351     * there. The Drawables must already have had {@link Drawable#setBounds}
2352     * called.
2353     * <p>
2354     * Calling this method will overwrite any Drawables previously set using
2355     * {@link #setCompoundDrawables} or related methods.
2356     *
2357     * @attr ref android.R.styleable#TextView_drawableStart
2358     * @attr ref android.R.styleable#TextView_drawableTop
2359     * @attr ref android.R.styleable#TextView_drawableEnd
2360     * @attr ref android.R.styleable#TextView_drawableBottom
2361     */
2362    @android.view.RemotableViewMethod
2363    public void setCompoundDrawablesRelative(@Nullable Drawable start, @Nullable Drawable top,
2364            @Nullable Drawable end, @Nullable Drawable bottom) {
2365        Drawables dr = mDrawables;
2366
2367        // We're switching to relative, discard absolute.
2368        if (dr != null) {
2369            if (dr.mShowing[Drawables.LEFT] != null) {
2370                dr.mShowing[Drawables.LEFT].setCallback(null);
2371            }
2372            dr.mShowing[Drawables.LEFT] = dr.mDrawableLeftInitial = null;
2373            if (dr.mShowing[Drawables.RIGHT] != null) {
2374                dr.mShowing[Drawables.RIGHT].setCallback(null);
2375            }
2376            dr.mShowing[Drawables.RIGHT] = dr.mDrawableRightInitial = null;
2377            dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
2378            dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
2379        }
2380
2381        final boolean drawables = start != null || top != null
2382                || end != null || bottom != null;
2383
2384        if (!drawables) {
2385            // Clearing drawables...  can we free the data structure?
2386            if (dr != null) {
2387                if (!dr.hasMetadata()) {
2388                    mDrawables = null;
2389                } else {
2390                    // We need to retain the last set padding, so just clear
2391                    // out all of the fields in the existing structure.
2392                    if (dr.mDrawableStart != null) dr.mDrawableStart.setCallback(null);
2393                    dr.mDrawableStart = null;
2394                    if (dr.mShowing[Drawables.TOP] != null) {
2395                        dr.mShowing[Drawables.TOP].setCallback(null);
2396                    }
2397                    dr.mShowing[Drawables.TOP] = null;
2398                    if (dr.mDrawableEnd != null) {
2399                        dr.mDrawableEnd.setCallback(null);
2400                    }
2401                    dr.mDrawableEnd = null;
2402                    if (dr.mShowing[Drawables.BOTTOM] != null) {
2403                        dr.mShowing[Drawables.BOTTOM].setCallback(null);
2404                    }
2405                    dr.mShowing[Drawables.BOTTOM] = null;
2406                    dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
2407                    dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
2408                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
2409                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
2410                }
2411            }
2412        } else {
2413            if (dr == null) {
2414                mDrawables = dr = new Drawables(getContext());
2415            }
2416
2417            mDrawables.mOverride = true;
2418
2419            if (dr.mDrawableStart != start && dr.mDrawableStart != null) {
2420                dr.mDrawableStart.setCallback(null);
2421            }
2422            dr.mDrawableStart = start;
2423
2424            if (dr.mShowing[Drawables.TOP] != top && dr.mShowing[Drawables.TOP] != null) {
2425                dr.mShowing[Drawables.TOP].setCallback(null);
2426            }
2427            dr.mShowing[Drawables.TOP] = top;
2428
2429            if (dr.mDrawableEnd != end && dr.mDrawableEnd != null) {
2430                dr.mDrawableEnd.setCallback(null);
2431            }
2432            dr.mDrawableEnd = end;
2433
2434            if (dr.mShowing[Drawables.BOTTOM] != bottom && dr.mShowing[Drawables.BOTTOM] != null) {
2435                dr.mShowing[Drawables.BOTTOM].setCallback(null);
2436            }
2437            dr.mShowing[Drawables.BOTTOM] = bottom;
2438
2439            final Rect compoundRect = dr.mCompoundRect;
2440            int[] state;
2441
2442            state = getDrawableState();
2443
2444            if (start != null) {
2445                start.setState(state);
2446                start.copyBounds(compoundRect);
2447                start.setCallback(this);
2448                dr.mDrawableSizeStart = compoundRect.width();
2449                dr.mDrawableHeightStart = compoundRect.height();
2450            } else {
2451                dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
2452            }
2453
2454            if (end != null) {
2455                end.setState(state);
2456                end.copyBounds(compoundRect);
2457                end.setCallback(this);
2458                dr.mDrawableSizeEnd = compoundRect.width();
2459                dr.mDrawableHeightEnd = compoundRect.height();
2460            } else {
2461                dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
2462            }
2463
2464            if (top != null) {
2465                top.setState(state);
2466                top.copyBounds(compoundRect);
2467                top.setCallback(this);
2468                dr.mDrawableSizeTop = compoundRect.height();
2469                dr.mDrawableWidthTop = compoundRect.width();
2470            } else {
2471                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
2472            }
2473
2474            if (bottom != null) {
2475                bottom.setState(state);
2476                bottom.copyBounds(compoundRect);
2477                bottom.setCallback(this);
2478                dr.mDrawableSizeBottom = compoundRect.height();
2479                dr.mDrawableWidthBottom = compoundRect.width();
2480            } else {
2481                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
2482            }
2483        }
2484
2485        resetResolvedDrawables();
2486        resolveDrawables();
2487        invalidate();
2488        requestLayout();
2489    }
2490
2491    /**
2492     * Sets the Drawables (if any) to appear to the start of, above, to the end
2493     * of, and below the text. Use 0 if you do not want a Drawable there. The
2494     * Drawables' bounds will be set to their intrinsic bounds.
2495     * <p>
2496     * Calling this method will overwrite any Drawables previously set using
2497     * {@link #setCompoundDrawables} or related methods.
2498     *
2499     * @param start Resource identifier of the start Drawable.
2500     * @param top Resource identifier of the top Drawable.
2501     * @param end Resource identifier of the end Drawable.
2502     * @param bottom Resource identifier of the bottom Drawable.
2503     *
2504     * @attr ref android.R.styleable#TextView_drawableStart
2505     * @attr ref android.R.styleable#TextView_drawableTop
2506     * @attr ref android.R.styleable#TextView_drawableEnd
2507     * @attr ref android.R.styleable#TextView_drawableBottom
2508     */
2509    @android.view.RemotableViewMethod
2510    public void setCompoundDrawablesRelativeWithIntrinsicBounds(@DrawableRes int start,
2511            @DrawableRes int top, @DrawableRes int end, @DrawableRes int bottom) {
2512        final Context context = getContext();
2513        setCompoundDrawablesRelativeWithIntrinsicBounds(
2514                start != 0 ? context.getDrawable(start) : null,
2515                top != 0 ? context.getDrawable(top) : null,
2516                end != 0 ? context.getDrawable(end) : null,
2517                bottom != 0 ? context.getDrawable(bottom) : null);
2518    }
2519
2520    /**
2521     * Sets the Drawables (if any) to appear to the start of, above, to the end
2522     * of, and below the text. Use {@code null} if you do not want a Drawable
2523     * there. The Drawables' bounds will be set to their intrinsic bounds.
2524     * <p>
2525     * Calling this method will overwrite any Drawables previously set using
2526     * {@link #setCompoundDrawables} or related methods.
2527     *
2528     * @attr ref android.R.styleable#TextView_drawableStart
2529     * @attr ref android.R.styleable#TextView_drawableTop
2530     * @attr ref android.R.styleable#TextView_drawableEnd
2531     * @attr ref android.R.styleable#TextView_drawableBottom
2532     */
2533    @android.view.RemotableViewMethod
2534    public void setCompoundDrawablesRelativeWithIntrinsicBounds(@Nullable Drawable start,
2535            @Nullable Drawable top, @Nullable Drawable end, @Nullable Drawable bottom) {
2536
2537        if (start != null) {
2538            start.setBounds(0, 0, start.getIntrinsicWidth(), start.getIntrinsicHeight());
2539        }
2540        if (end != null) {
2541            end.setBounds(0, 0, end.getIntrinsicWidth(), end.getIntrinsicHeight());
2542        }
2543        if (top != null) {
2544            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
2545        }
2546        if (bottom != null) {
2547            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
2548        }
2549        setCompoundDrawablesRelative(start, top, end, bottom);
2550    }
2551
2552    /**
2553     * Returns drawables for the left, top, right, and bottom borders.
2554     *
2555     * @attr ref android.R.styleable#TextView_drawableLeft
2556     * @attr ref android.R.styleable#TextView_drawableTop
2557     * @attr ref android.R.styleable#TextView_drawableRight
2558     * @attr ref android.R.styleable#TextView_drawableBottom
2559     */
2560    @NonNull
2561    public Drawable[] getCompoundDrawables() {
2562        final Drawables dr = mDrawables;
2563        if (dr != null) {
2564            return dr.mShowing.clone();
2565        } else {
2566            return new Drawable[] { null, null, null, null };
2567        }
2568    }
2569
2570    /**
2571     * Returns drawables for the start, top, end, and bottom borders.
2572     *
2573     * @attr ref android.R.styleable#TextView_drawableStart
2574     * @attr ref android.R.styleable#TextView_drawableTop
2575     * @attr ref android.R.styleable#TextView_drawableEnd
2576     * @attr ref android.R.styleable#TextView_drawableBottom
2577     */
2578    @NonNull
2579    public Drawable[] getCompoundDrawablesRelative() {
2580        final Drawables dr = mDrawables;
2581        if (dr != null) {
2582            return new Drawable[] {
2583                dr.mDrawableStart, dr.mShowing[Drawables.TOP],
2584                dr.mDrawableEnd, dr.mShowing[Drawables.BOTTOM]
2585            };
2586        } else {
2587            return new Drawable[] { null, null, null, null };
2588        }
2589    }
2590
2591    /**
2592     * Sets the size of the padding between the compound drawables and
2593     * the text.
2594     *
2595     * @attr ref android.R.styleable#TextView_drawablePadding
2596     */
2597    @android.view.RemotableViewMethod
2598    public void setCompoundDrawablePadding(int pad) {
2599        Drawables dr = mDrawables;
2600        if (pad == 0) {
2601            if (dr != null) {
2602                dr.mDrawablePadding = pad;
2603            }
2604        } else {
2605            if (dr == null) {
2606                mDrawables = dr = new Drawables(getContext());
2607            }
2608            dr.mDrawablePadding = pad;
2609        }
2610
2611        invalidate();
2612        requestLayout();
2613    }
2614
2615    /**
2616     * Returns the padding between the compound drawables and the text.
2617     *
2618     * @attr ref android.R.styleable#TextView_drawablePadding
2619     */
2620    public int getCompoundDrawablePadding() {
2621        final Drawables dr = mDrawables;
2622        return dr != null ? dr.mDrawablePadding : 0;
2623    }
2624
2625    /**
2626     * Applies a tint to the compound drawables. Does not modify the
2627     * current tint mode, which is {@link PorterDuff.Mode#SRC_IN} by default.
2628     * <p>
2629     * Subsequent calls to
2630     * {@link #setCompoundDrawables(Drawable, Drawable, Drawable, Drawable)}
2631     * and related methods will automatically mutate the drawables and apply
2632     * the specified tint and tint mode using
2633     * {@link Drawable#setTintList(ColorStateList)}.
2634     *
2635     * @param tint the tint to apply, may be {@code null} to clear tint
2636     *
2637     * @attr ref android.R.styleable#TextView_drawableTint
2638     * @see #getCompoundDrawableTintList()
2639     * @see Drawable#setTintList(ColorStateList)
2640     */
2641    public void setCompoundDrawableTintList(@Nullable ColorStateList tint) {
2642        if (mDrawables == null) {
2643            mDrawables = new Drawables(getContext());
2644        }
2645        mDrawables.mTintList = tint;
2646        mDrawables.mHasTint = true;
2647
2648        applyCompoundDrawableTint();
2649    }
2650
2651    /**
2652     * @return the tint applied to the compound drawables
2653     * @attr ref android.R.styleable#TextView_drawableTint
2654     * @see #setCompoundDrawableTintList(ColorStateList)
2655     */
2656    public ColorStateList getCompoundDrawableTintList() {
2657        return mDrawables != null ? mDrawables.mTintList : null;
2658    }
2659
2660    /**
2661     * Specifies the blending mode used to apply the tint specified by
2662     * {@link #setCompoundDrawableTintList(ColorStateList)} to the compound
2663     * drawables. The default mode is {@link PorterDuff.Mode#SRC_IN}.
2664     *
2665     * @param tintMode the blending mode used to apply the tint, may be
2666     *                 {@code null} to clear tint
2667     * @attr ref android.R.styleable#TextView_drawableTintMode
2668     * @see #setCompoundDrawableTintList(ColorStateList)
2669     * @see Drawable#setTintMode(PorterDuff.Mode)
2670     */
2671    public void setCompoundDrawableTintMode(@Nullable PorterDuff.Mode tintMode) {
2672        if (mDrawables == null) {
2673            mDrawables = new Drawables(getContext());
2674        }
2675        mDrawables.mTintMode = tintMode;
2676        mDrawables.mHasTintMode = true;
2677
2678        applyCompoundDrawableTint();
2679    }
2680
2681    /**
2682     * Returns the blending mode used to apply the tint to the compound
2683     * drawables, if specified.
2684     *
2685     * @return the blending mode used to apply the tint to the compound
2686     *         drawables
2687     * @attr ref android.R.styleable#TextView_drawableTintMode
2688     * @see #setCompoundDrawableTintMode(PorterDuff.Mode)
2689     */
2690    public PorterDuff.Mode getCompoundDrawableTintMode() {
2691        return mDrawables != null ? mDrawables.mTintMode : null;
2692    }
2693
2694    private void applyCompoundDrawableTint() {
2695        if (mDrawables == null) {
2696            return;
2697        }
2698
2699        if (mDrawables.mHasTint || mDrawables.mHasTintMode) {
2700            final ColorStateList tintList = mDrawables.mTintList;
2701            final PorterDuff.Mode tintMode = mDrawables.mTintMode;
2702            final boolean hasTint = mDrawables.mHasTint;
2703            final boolean hasTintMode = mDrawables.mHasTintMode;
2704            final int[] state = getDrawableState();
2705
2706            for (Drawable dr : mDrawables.mShowing) {
2707                if (dr == null) {
2708                    continue;
2709                }
2710
2711                if (dr == mDrawables.mDrawableError) {
2712                    // From a developer's perspective, the error drawable isn't
2713                    // a compound drawable. Don't apply the generic compound
2714                    // drawable tint to it.
2715                    continue;
2716                }
2717
2718                dr.mutate();
2719
2720                if (hasTint) {
2721                    dr.setTintList(tintList);
2722                }
2723
2724                if (hasTintMode) {
2725                    dr.setTintMode(tintMode);
2726                }
2727
2728                // The drawable (or one of its children) may not have been
2729                // stateful before applying the tint, so let's try again.
2730                if (dr.isStateful()) {
2731                    dr.setState(state);
2732                }
2733            }
2734        }
2735    }
2736
2737    @Override
2738    public void setPadding(int left, int top, int right, int bottom) {
2739        if (left != mPaddingLeft ||
2740            right != mPaddingRight ||
2741            top != mPaddingTop ||
2742            bottom != mPaddingBottom) {
2743            nullLayouts();
2744        }
2745
2746        // the super call will requestLayout()
2747        super.setPadding(left, top, right, bottom);
2748        invalidate();
2749    }
2750
2751    @Override
2752    public void setPaddingRelative(int start, int top, int end, int bottom) {
2753        if (start != getPaddingStart() ||
2754            end != getPaddingEnd() ||
2755            top != mPaddingTop ||
2756            bottom != mPaddingBottom) {
2757            nullLayouts();
2758        }
2759
2760        // the super call will requestLayout()
2761        super.setPaddingRelative(start, top, end, bottom);
2762        invalidate();
2763    }
2764
2765    /**
2766     * Gets the autolink mask of the text.  See {@link
2767     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
2768     * possible values.
2769     *
2770     * @attr ref android.R.styleable#TextView_autoLink
2771     */
2772    public final int getAutoLinkMask() {
2773        return mAutoLinkMask;
2774    }
2775
2776    /**
2777     * Sets the text appearance from the specified style resource.
2778     * <p>
2779     * Use a framework-defined {@code TextAppearance} style like
2780     * {@link android.R.style#TextAppearance_Material_Body1 @android:style/TextAppearance.Material.Body1}
2781     * or see {@link android.R.styleable#TextAppearance TextAppearance} for the
2782     * set of attributes that can be used in a custom style.
2783     *
2784     * @param resId the resource identifier of the style to apply
2785     * @attr ref android.R.styleable#TextView_textAppearance
2786     */
2787    @SuppressWarnings("deprecation")
2788    public void setTextAppearance(@StyleRes int resId) {
2789        setTextAppearance(mContext, resId);
2790    }
2791
2792    /**
2793     * Sets the text color, size, style, hint color, and highlight color
2794     * from the specified TextAppearance resource.
2795     *
2796     * @deprecated Use {@link #setTextAppearance(int)} instead.
2797     */
2798    @Deprecated
2799    public void setTextAppearance(Context context, @StyleRes int resId) {
2800        final TypedArray ta = context.obtainStyledAttributes(resId, R.styleable.TextAppearance);
2801
2802        final int textColorHighlight = ta.getColor(
2803                R.styleable.TextAppearance_textColorHighlight, 0);
2804        if (textColorHighlight != 0) {
2805            setHighlightColor(textColorHighlight);
2806        }
2807
2808        final ColorStateList textColor = ta.getColorStateList(R.styleable.TextAppearance_textColor);
2809        if (textColor != null) {
2810            setTextColor(textColor);
2811        }
2812
2813        final int textSize = ta.getDimensionPixelSize(R.styleable.TextAppearance_textSize, 0);
2814        if (textSize != 0) {
2815            setRawTextSize(textSize);
2816        }
2817
2818        final ColorStateList textColorHint = ta.getColorStateList(
2819                R.styleable.TextAppearance_textColorHint);
2820        if (textColorHint != null) {
2821            setHintTextColor(textColorHint);
2822        }
2823
2824        final ColorStateList textColorLink = ta.getColorStateList(
2825                R.styleable.TextAppearance_textColorLink);
2826        if (textColorLink != null) {
2827            setLinkTextColor(textColorLink);
2828        }
2829
2830        final String fontFamily = ta.getString(R.styleable.TextAppearance_fontFamily);
2831        final int typefaceIndex = ta.getInt(R.styleable.TextAppearance_typeface, -1);
2832        final int styleIndex = ta.getInt(R.styleable.TextAppearance_textStyle, -1);
2833        setTypefaceFromAttrs(fontFamily, typefaceIndex, styleIndex);
2834
2835        final int shadowColor = ta.getInt(R.styleable.TextAppearance_shadowColor, 0);
2836        if (shadowColor != 0) {
2837            final float dx = ta.getFloat(R.styleable.TextAppearance_shadowDx, 0);
2838            final float dy = ta.getFloat(R.styleable.TextAppearance_shadowDy, 0);
2839            final float r = ta.getFloat(R.styleable.TextAppearance_shadowRadius, 0);
2840            setShadowLayer(r, dx, dy, shadowColor);
2841        }
2842
2843        if (ta.getBoolean(R.styleable.TextAppearance_textAllCaps, false)) {
2844            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
2845        }
2846
2847        if (ta.hasValue(R.styleable.TextAppearance_elegantTextHeight)) {
2848            setElegantTextHeight(ta.getBoolean(
2849                R.styleable.TextAppearance_elegantTextHeight, false));
2850        }
2851
2852        if (ta.hasValue(R.styleable.TextAppearance_letterSpacing)) {
2853            setLetterSpacing(ta.getFloat(
2854                R.styleable.TextAppearance_letterSpacing, 0));
2855        }
2856
2857        if (ta.hasValue(R.styleable.TextAppearance_fontFeatureSettings)) {
2858            setFontFeatureSettings(ta.getString(
2859                R.styleable.TextAppearance_fontFeatureSettings));
2860        }
2861
2862        ta.recycle();
2863    }
2864
2865    /**
2866     * Get the default primary {@link Locale} of the text in this TextView. This will always be
2867     * the first member of {@link #getTextLocales()}.
2868     * @return the default primary {@link Locale} of the text in this TextView.
2869     */
2870    @NonNull
2871    public Locale getTextLocale() {
2872        return mTextPaint.getTextLocale();
2873    }
2874
2875    /**
2876     * Get the default {@link LocaleList} of the text in this TextView.
2877     * @return the default {@link LocaleList} of the text in this TextView.
2878     */
2879    @NonNull @Size(min=1)
2880    public LocaleList getTextLocales() {
2881        return mTextPaint.getTextLocales();
2882    }
2883
2884    /**
2885     * Set the default {@link LocaleList} of the text in this TextView to a one-member list
2886     * containing just the given value.
2887     *
2888     * @param locale the {@link Locale} for drawing text, must not be null.
2889     *
2890     * @see #setTextLocales
2891     */
2892    public void setTextLocale(@NonNull Locale locale) {
2893        mLocalesChanged = true;
2894        mTextPaint.setTextLocale(locale);
2895    }
2896
2897    /**
2898     * Set the default {@link LocaleList} of the text in this TextView to the given value.
2899     *
2900     * This value is used to choose appropriate typefaces for ambiguous characters (typically used
2901     * for CJK locales to disambiguate Hanzi/Kanji/Hanja characters). It also affects
2902     * other aspects of text display, including line breaking.
2903     *
2904     * @param locales the {@link LocaleList} for drawing text, must not be null or empty.
2905     *
2906     * @see Paint#setTextLocales
2907     */
2908    public void setTextLocales(@NonNull @Size(min=1) LocaleList locales) {
2909        mLocalesChanged = true;
2910        mTextPaint.setTextLocales(locales);
2911    }
2912
2913    @Override
2914    protected void onConfigurationChanged(Configuration newConfig) {
2915        super.onConfigurationChanged(newConfig);
2916        if (!mLocalesChanged) {
2917            mTextPaint.setTextLocales(LocaleList.getDefault());
2918        }
2919    }
2920
2921    /**
2922     * @return the size (in pixels) of the default text size in this TextView.
2923     */
2924    @ViewDebug.ExportedProperty(category = "text")
2925    public float getTextSize() {
2926        return mTextPaint.getTextSize();
2927    }
2928
2929    /**
2930     * @return the size (in scaled pixels) of thee default text size in this TextView.
2931     * @hide
2932     */
2933    @ViewDebug.ExportedProperty(category = "text")
2934    public float getScaledTextSize() {
2935        return mTextPaint.getTextSize() / mTextPaint.density;
2936    }
2937
2938    /** @hide */
2939    @ViewDebug.ExportedProperty(category = "text", mapping = {
2940            @ViewDebug.IntToString(from = Typeface.NORMAL, to = "NORMAL"),
2941            @ViewDebug.IntToString(from = Typeface.BOLD, to = "BOLD"),
2942            @ViewDebug.IntToString(from = Typeface.ITALIC, to = "ITALIC"),
2943            @ViewDebug.IntToString(from = Typeface.BOLD_ITALIC, to = "BOLD_ITALIC")
2944    })
2945    public int getTypefaceStyle() {
2946        Typeface typeface = mTextPaint.getTypeface();
2947        return typeface != null ? typeface.getStyle() : Typeface.NORMAL;
2948    }
2949
2950    /**
2951     * Set the default text size to the given value, interpreted as "scaled
2952     * pixel" units.  This size is adjusted based on the current density and
2953     * user font size preference.
2954     *
2955     * @param size The scaled pixel size.
2956     *
2957     * @attr ref android.R.styleable#TextView_textSize
2958     */
2959    @android.view.RemotableViewMethod
2960    public void setTextSize(float size) {
2961        setTextSize(TypedValue.COMPLEX_UNIT_SP, size);
2962    }
2963
2964    /**
2965     * Set the default text size to a given unit and value.  See {@link
2966     * TypedValue} for the possible dimension units.
2967     *
2968     * @param unit The desired dimension unit.
2969     * @param size The desired size in the given units.
2970     *
2971     * @attr ref android.R.styleable#TextView_textSize
2972     */
2973    public void setTextSize(int unit, float size) {
2974        Context c = getContext();
2975        Resources r;
2976
2977        if (c == null)
2978            r = Resources.getSystem();
2979        else
2980            r = c.getResources();
2981
2982        setRawTextSize(TypedValue.applyDimension(
2983                unit, size, r.getDisplayMetrics()));
2984    }
2985
2986    private void setRawTextSize(float size) {
2987        if (size != mTextPaint.getTextSize()) {
2988            mTextPaint.setTextSize(size);
2989
2990            if (mLayout != null) {
2991                nullLayouts();
2992                requestLayout();
2993                invalidate();
2994            }
2995        }
2996    }
2997
2998    /**
2999     * @return the extent by which text is currently being stretched
3000     * horizontally.  This will usually be 1.
3001     */
3002    public float getTextScaleX() {
3003        return mTextPaint.getTextScaleX();
3004    }
3005
3006    /**
3007     * Sets the extent by which text should be stretched horizontally.
3008     *
3009     * @attr ref android.R.styleable#TextView_textScaleX
3010     */
3011    @android.view.RemotableViewMethod
3012    public void setTextScaleX(float size) {
3013        if (size != mTextPaint.getTextScaleX()) {
3014            mUserSetTextScaleX = true;
3015            mTextPaint.setTextScaleX(size);
3016
3017            if (mLayout != null) {
3018                nullLayouts();
3019                requestLayout();
3020                invalidate();
3021            }
3022        }
3023    }
3024
3025    /**
3026     * Sets the typeface and style in which the text should be displayed.
3027     * Note that not all Typeface families actually have bold and italic
3028     * variants, so you may need to use
3029     * {@link #setTypeface(Typeface, int)} to get the appearance
3030     * that you actually want.
3031     *
3032     * @see #getTypeface()
3033     *
3034     * @attr ref android.R.styleable#TextView_fontFamily
3035     * @attr ref android.R.styleable#TextView_typeface
3036     * @attr ref android.R.styleable#TextView_textStyle
3037     */
3038    public void setTypeface(Typeface tf) {
3039        if (mTextPaint.getTypeface() != tf) {
3040            mTextPaint.setTypeface(tf);
3041
3042            if (mLayout != null) {
3043                nullLayouts();
3044                requestLayout();
3045                invalidate();
3046            }
3047        }
3048    }
3049
3050    /**
3051     * @return the current typeface and style in which the text is being
3052     * displayed.
3053     *
3054     * @see #setTypeface(Typeface)
3055     *
3056     * @attr ref android.R.styleable#TextView_fontFamily
3057     * @attr ref android.R.styleable#TextView_typeface
3058     * @attr ref android.R.styleable#TextView_textStyle
3059     */
3060    public Typeface getTypeface() {
3061        return mTextPaint.getTypeface();
3062    }
3063
3064    /**
3065     * Set the TextView's elegant height metrics flag. This setting selects font
3066     * variants that have not been compacted to fit Latin-based vertical
3067     * metrics, and also increases top and bottom bounds to provide more space.
3068     *
3069     * @param elegant set the paint's elegant metrics flag.
3070     *
3071     * @attr ref android.R.styleable#TextView_elegantTextHeight
3072     */
3073    public void setElegantTextHeight(boolean elegant) {
3074        mTextPaint.setElegantTextHeight(elegant);
3075    }
3076
3077    /**
3078     * @return the extent by which text is currently being letter-spaced.
3079     * This will normally be 0.
3080     *
3081     * @see #setLetterSpacing(float)
3082     * @see Paint#setLetterSpacing
3083     */
3084    public float getLetterSpacing() {
3085        return mTextPaint.getLetterSpacing();
3086    }
3087
3088    /**
3089     * Sets text letter-spacing.  The value is in 'EM' units.  Typical values
3090     * for slight expansion will be around 0.05.  Negative values tighten text.
3091     *
3092     * @see #getLetterSpacing()
3093     * @see Paint#getLetterSpacing
3094     *
3095     * @attr ref android.R.styleable#TextView_letterSpacing
3096     */
3097    @android.view.RemotableViewMethod
3098    public void setLetterSpacing(float letterSpacing) {
3099        if (letterSpacing != mTextPaint.getLetterSpacing()) {
3100            mTextPaint.setLetterSpacing(letterSpacing);
3101
3102            if (mLayout != null) {
3103                nullLayouts();
3104                requestLayout();
3105                invalidate();
3106            }
3107        }
3108    }
3109
3110    /**
3111     * @return the currently set font feature settings.  Default is null.
3112     *
3113     * @see #setFontFeatureSettings(String)
3114     * @see Paint#setFontFeatureSettings
3115     */
3116    @Nullable
3117    public String getFontFeatureSettings() {
3118        return mTextPaint.getFontFeatureSettings();
3119    }
3120
3121    /**
3122     * Sets the break strategy for breaking paragraphs into lines. The default value for
3123     * TextView is {@link Layout#BREAK_STRATEGY_HIGH_QUALITY}, and the default value for
3124     * EditText is {@link Layout#BREAK_STRATEGY_SIMPLE}, the latter to avoid the
3125     * text "dancing" when being edited.
3126     *
3127     * @attr ref android.R.styleable#TextView_breakStrategy
3128     * @see #getBreakStrategy()
3129     */
3130    public void setBreakStrategy(@Layout.BreakStrategy int breakStrategy) {
3131        mBreakStrategy = breakStrategy;
3132        if (mLayout != null) {
3133            nullLayouts();
3134            requestLayout();
3135            invalidate();
3136        }
3137    }
3138
3139    /**
3140     * @return the currently set break strategy.
3141     *
3142     * @attr ref android.R.styleable#TextView_breakStrategy
3143     * @see #setBreakStrategy(int)
3144     */
3145    @Layout.BreakStrategy
3146    public int getBreakStrategy() {
3147        return mBreakStrategy;
3148    }
3149
3150    /**
3151     * Sets the hyphenation frequency. The default value for both TextView and EditText, which is set
3152     * from the theme, is {@link Layout#HYPHENATION_FREQUENCY_NORMAL}.
3153     *
3154     * @attr ref android.R.styleable#TextView_hyphenationFrequency
3155     * @see #getHyphenationFrequency()
3156     */
3157    public void setHyphenationFrequency(@Layout.HyphenationFrequency int hyphenationFrequency) {
3158        mHyphenationFrequency = hyphenationFrequency;
3159        if (mLayout != null) {
3160            nullLayouts();
3161            requestLayout();
3162            invalidate();
3163        }
3164    }
3165
3166    /**
3167     * @return the currently set hyphenation frequency.
3168     *
3169     * @attr ref android.R.styleable#TextView_hyphenationFrequency
3170     * @see #setHyphenationFrequency(int)
3171     */
3172    @Layout.HyphenationFrequency
3173    public int getHyphenationFrequency() {
3174        return mHyphenationFrequency;
3175    }
3176
3177    /**
3178     * Sets font feature settings.  The format is the same as the CSS
3179     * font-feature-settings attribute:
3180     * http://dev.w3.org/csswg/css-fonts/#propdef-font-feature-settings
3181     *
3182     * @param fontFeatureSettings font feature settings represented as CSS compatible string
3183     * @see #getFontFeatureSettings()
3184     * @see Paint#getFontFeatureSettings
3185     *
3186     * @attr ref android.R.styleable#TextView_fontFeatureSettings
3187     */
3188    @android.view.RemotableViewMethod
3189    public void setFontFeatureSettings(@Nullable String fontFeatureSettings) {
3190        if (fontFeatureSettings != mTextPaint.getFontFeatureSettings()) {
3191            mTextPaint.setFontFeatureSettings(fontFeatureSettings);
3192
3193            if (mLayout != null) {
3194                nullLayouts();
3195                requestLayout();
3196                invalidate();
3197            }
3198        }
3199    }
3200
3201
3202    /**
3203     * Sets the text color for all the states (normal, selected,
3204     * focused) to be this color.
3205     *
3206     * @see #setTextColor(ColorStateList)
3207     * @see #getTextColors()
3208     *
3209     * @attr ref android.R.styleable#TextView_textColor
3210     */
3211    @android.view.RemotableViewMethod
3212    public void setTextColor(@ColorInt int color) {
3213        mTextColor = ColorStateList.valueOf(color);
3214        updateTextColors();
3215    }
3216
3217    /**
3218     * Sets the text color.
3219     *
3220     * @see #setTextColor(int)
3221     * @see #getTextColors()
3222     * @see #setHintTextColor(ColorStateList)
3223     * @see #setLinkTextColor(ColorStateList)
3224     *
3225     * @attr ref android.R.styleable#TextView_textColor
3226     */
3227    public void setTextColor(ColorStateList colors) {
3228        if (colors == null) {
3229            throw new NullPointerException();
3230        }
3231
3232        mTextColor = colors;
3233        updateTextColors();
3234    }
3235
3236    /**
3237     * Gets the text colors for the different states (normal, selected, focused) of the TextView.
3238     *
3239     * @see #setTextColor(ColorStateList)
3240     * @see #setTextColor(int)
3241     *
3242     * @attr ref android.R.styleable#TextView_textColor
3243     */
3244    public final ColorStateList getTextColors() {
3245        return mTextColor;
3246    }
3247
3248    /**
3249     * <p>Return the current color selected for normal text.</p>
3250     *
3251     * @return Returns the current text color.
3252     */
3253    @ColorInt
3254    public final int getCurrentTextColor() {
3255        return mCurTextColor;
3256    }
3257
3258    /**
3259     * Sets the color used to display the selection highlight.
3260     *
3261     * @attr ref android.R.styleable#TextView_textColorHighlight
3262     */
3263    @android.view.RemotableViewMethod
3264    public void setHighlightColor(@ColorInt int color) {
3265        if (mHighlightColor != color) {
3266            mHighlightColor = color;
3267            invalidate();
3268        }
3269    }
3270
3271    /**
3272     * @return the color used to display the selection highlight
3273     *
3274     * @see #setHighlightColor(int)
3275     *
3276     * @attr ref android.R.styleable#TextView_textColorHighlight
3277     */
3278    @ColorInt
3279    public int getHighlightColor() {
3280        return mHighlightColor;
3281    }
3282
3283    /**
3284     * Sets whether the soft input method will be made visible when this
3285     * TextView gets focused. The default is true.
3286     */
3287    @android.view.RemotableViewMethod
3288    public final void setShowSoftInputOnFocus(boolean show) {
3289        createEditorIfNeeded();
3290        mEditor.mShowSoftInputOnFocus = show;
3291    }
3292
3293    /**
3294     * Returns whether the soft input method will be made visible when this
3295     * TextView gets focused. The default is true.
3296     */
3297    public final boolean getShowSoftInputOnFocus() {
3298        // When there is no Editor, return default true value
3299        return mEditor == null || mEditor.mShowSoftInputOnFocus;
3300    }
3301
3302    /**
3303     * Gives the text a shadow of the specified blur radius and color, the specified
3304     * distance from its drawn position.
3305     * <p>
3306     * The text shadow produced does not interact with the properties on view
3307     * that are responsible for real time shadows,
3308     * {@link View#getElevation() elevation} and
3309     * {@link View#getTranslationZ() translationZ}.
3310     *
3311     * @see Paint#setShadowLayer(float, float, float, int)
3312     *
3313     * @attr ref android.R.styleable#TextView_shadowColor
3314     * @attr ref android.R.styleable#TextView_shadowDx
3315     * @attr ref android.R.styleable#TextView_shadowDy
3316     * @attr ref android.R.styleable#TextView_shadowRadius
3317     */
3318    public void setShadowLayer(float radius, float dx, float dy, int color) {
3319        mTextPaint.setShadowLayer(radius, dx, dy, color);
3320
3321        mShadowRadius = radius;
3322        mShadowDx = dx;
3323        mShadowDy = dy;
3324        mShadowColor = color;
3325
3326        // Will change text clip region
3327        if (mEditor != null) mEditor.invalidateTextDisplayList();
3328        invalidate();
3329    }
3330
3331    /**
3332     * Gets the radius of the shadow layer.
3333     *
3334     * @return the radius of the shadow layer. If 0, the shadow layer is not visible
3335     *
3336     * @see #setShadowLayer(float, float, float, int)
3337     *
3338     * @attr ref android.R.styleable#TextView_shadowRadius
3339     */
3340    public float getShadowRadius() {
3341        return mShadowRadius;
3342    }
3343
3344    /**
3345     * @return the horizontal offset of the shadow layer
3346     *
3347     * @see #setShadowLayer(float, float, float, int)
3348     *
3349     * @attr ref android.R.styleable#TextView_shadowDx
3350     */
3351    public float getShadowDx() {
3352        return mShadowDx;
3353    }
3354
3355    /**
3356     * @return the vertical offset of the shadow layer
3357     *
3358     * @see #setShadowLayer(float, float, float, int)
3359     *
3360     * @attr ref android.R.styleable#TextView_shadowDy
3361     */
3362    public float getShadowDy() {
3363        return mShadowDy;
3364    }
3365
3366    /**
3367     * @return the color of the shadow layer
3368     *
3369     * @see #setShadowLayer(float, float, float, int)
3370     *
3371     * @attr ref android.R.styleable#TextView_shadowColor
3372     */
3373    @ColorInt
3374    public int getShadowColor() {
3375        return mShadowColor;
3376    }
3377
3378    /**
3379     * @return the base paint used for the text.  Please use this only to
3380     * consult the Paint's properties and not to change them.
3381     */
3382    public TextPaint getPaint() {
3383        return mTextPaint;
3384    }
3385
3386    /**
3387     * Sets the autolink mask of the text.  See {@link
3388     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
3389     * possible values.
3390     *
3391     * @attr ref android.R.styleable#TextView_autoLink
3392     */
3393    @android.view.RemotableViewMethod
3394    public final void setAutoLinkMask(int mask) {
3395        mAutoLinkMask = mask;
3396    }
3397
3398    /**
3399     * Sets whether the movement method will automatically be set to {@link LinkMovementMethod}
3400     * after {@link #setText} or {@link #append} is called. The movement method is set if one of the
3401     * following is true:
3402     * <ul>
3403     * <li>{@link #setAutoLinkMask} has been set to nonzero and links are detected in
3404     * {@link #setText} or {@link #append}.
3405     * <li>The input for {@link #setText} or {@link #append} contains a {@link ClickableSpan}.
3406     * </ul>
3407     *
3408     * <p>This function does not have an immediate effect, movement method will be set only after a
3409     * call to {@link #setText} or {@link #append}. The default is true.</p>
3410     *
3411     * @attr ref android.R.styleable#TextView_linksClickable
3412     */
3413    @android.view.RemotableViewMethod
3414    public final void setLinksClickable(boolean whether) {
3415        mLinksClickable = whether;
3416    }
3417
3418    /**
3419     * Returns whether the movement method will automatically be set to {@link LinkMovementMethod}
3420     * after {@link #setText} or {@link #append} is called.
3421     *
3422     * See {@link #setLinksClickable} for details.
3423     *
3424     * <p>The default is true.</p>
3425     *
3426     * @see #setLinksClickable
3427     *
3428     * @attr ref android.R.styleable#TextView_linksClickable
3429     */
3430    public final boolean getLinksClickable() {
3431        return mLinksClickable;
3432    }
3433
3434    /**
3435     * Returns the list of URLSpans attached to the text
3436     * (by {@link Linkify} or otherwise) if any.  You can call
3437     * {@link URLSpan#getURL} on them to find where they link to
3438     * or use {@link Spanned#getSpanStart} and {@link Spanned#getSpanEnd}
3439     * to find the region of the text they are attached to.
3440     */
3441    public URLSpan[] getUrls() {
3442        if (mText instanceof Spanned) {
3443            return ((Spanned) mText).getSpans(0, mText.length(), URLSpan.class);
3444        } else {
3445            return new URLSpan[0];
3446        }
3447    }
3448
3449    /**
3450     * Sets the color of the hint text for all the states (disabled, focussed, selected...) of this
3451     * TextView.
3452     *
3453     * @see #setHintTextColor(ColorStateList)
3454     * @see #getHintTextColors()
3455     * @see #setTextColor(int)
3456     *
3457     * @attr ref android.R.styleable#TextView_textColorHint
3458     */
3459    @android.view.RemotableViewMethod
3460    public final void setHintTextColor(@ColorInt int color) {
3461        mHintTextColor = ColorStateList.valueOf(color);
3462        updateTextColors();
3463    }
3464
3465    /**
3466     * Sets the color of the hint text.
3467     *
3468     * @see #getHintTextColors()
3469     * @see #setHintTextColor(int)
3470     * @see #setTextColor(ColorStateList)
3471     * @see #setLinkTextColor(ColorStateList)
3472     *
3473     * @attr ref android.R.styleable#TextView_textColorHint
3474     */
3475    public final void setHintTextColor(ColorStateList colors) {
3476        mHintTextColor = colors;
3477        updateTextColors();
3478    }
3479
3480    /**
3481     * @return the color of the hint text, for the different states of this TextView.
3482     *
3483     * @see #setHintTextColor(ColorStateList)
3484     * @see #setHintTextColor(int)
3485     * @see #setTextColor(ColorStateList)
3486     * @see #setLinkTextColor(ColorStateList)
3487     *
3488     * @attr ref android.R.styleable#TextView_textColorHint
3489     */
3490    public final ColorStateList getHintTextColors() {
3491        return mHintTextColor;
3492    }
3493
3494    /**
3495     * <p>Return the current color selected to paint the hint text.</p>
3496     *
3497     * @return Returns the current hint text color.
3498     */
3499    @ColorInt
3500    public final int getCurrentHintTextColor() {
3501        return mHintTextColor != null ? mCurHintTextColor : mCurTextColor;
3502    }
3503
3504    /**
3505     * Sets the color of links in the text.
3506     *
3507     * @see #setLinkTextColor(ColorStateList)
3508     * @see #getLinkTextColors()
3509     *
3510     * @attr ref android.R.styleable#TextView_textColorLink
3511     */
3512    @android.view.RemotableViewMethod
3513    public final void setLinkTextColor(@ColorInt int color) {
3514        mLinkTextColor = ColorStateList.valueOf(color);
3515        updateTextColors();
3516    }
3517
3518    /**
3519     * Sets the color of links in the text.
3520     *
3521     * @see #setLinkTextColor(int)
3522     * @see #getLinkTextColors()
3523     * @see #setTextColor(ColorStateList)
3524     * @see #setHintTextColor(ColorStateList)
3525     *
3526     * @attr ref android.R.styleable#TextView_textColorLink
3527     */
3528    public final void setLinkTextColor(ColorStateList colors) {
3529        mLinkTextColor = colors;
3530        updateTextColors();
3531    }
3532
3533    /**
3534     * @return the list of colors used to paint the links in the text, for the different states of
3535     * this TextView
3536     *
3537     * @see #setLinkTextColor(ColorStateList)
3538     * @see #setLinkTextColor(int)
3539     *
3540     * @attr ref android.R.styleable#TextView_textColorLink
3541     */
3542    public final ColorStateList getLinkTextColors() {
3543        return mLinkTextColor;
3544    }
3545
3546    /**
3547     * Sets the horizontal alignment of the text and the
3548     * vertical gravity that will be used when there is extra space
3549     * in the TextView beyond what is required for the text itself.
3550     *
3551     * @see android.view.Gravity
3552     * @attr ref android.R.styleable#TextView_gravity
3553     */
3554    public void setGravity(int gravity) {
3555        if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) == 0) {
3556            gravity |= Gravity.START;
3557        }
3558        if ((gravity & Gravity.VERTICAL_GRAVITY_MASK) == 0) {
3559            gravity |= Gravity.TOP;
3560        }
3561
3562        boolean newLayout = false;
3563
3564        if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) !=
3565            (mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK)) {
3566            newLayout = true;
3567        }
3568
3569        if (gravity != mGravity) {
3570            invalidate();
3571        }
3572
3573        mGravity = gravity;
3574
3575        if (mLayout != null && newLayout) {
3576            // XXX this is heavy-handed because no actual content changes.
3577            int want = mLayout.getWidth();
3578            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
3579
3580            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
3581                          mRight - mLeft - getCompoundPaddingLeft() -
3582                          getCompoundPaddingRight(), true);
3583        }
3584    }
3585
3586    /**
3587     * Returns the horizontal and vertical alignment of this TextView.
3588     *
3589     * @see android.view.Gravity
3590     * @attr ref android.R.styleable#TextView_gravity
3591     */
3592    public int getGravity() {
3593        return mGravity;
3594    }
3595
3596    /**
3597     * @return the flags on the Paint being used to display the text.
3598     * @see Paint#getFlags
3599     */
3600    public int getPaintFlags() {
3601        return mTextPaint.getFlags();
3602    }
3603
3604    /**
3605     * Sets flags on the Paint being used to display the text and
3606     * reflows the text if they are different from the old flags.
3607     * @see Paint#setFlags
3608     */
3609    @android.view.RemotableViewMethod
3610    public void setPaintFlags(int flags) {
3611        if (mTextPaint.getFlags() != flags) {
3612            mTextPaint.setFlags(flags);
3613
3614            if (mLayout != null) {
3615                nullLayouts();
3616                requestLayout();
3617                invalidate();
3618            }
3619        }
3620    }
3621
3622    /**
3623     * Sets whether the text should be allowed to be wider than the
3624     * View is.  If false, it will be wrapped to the width of the View.
3625     *
3626     * @attr ref android.R.styleable#TextView_scrollHorizontally
3627     */
3628    public void setHorizontallyScrolling(boolean whether) {
3629        if (mHorizontallyScrolling != whether) {
3630            mHorizontallyScrolling = whether;
3631
3632            if (mLayout != null) {
3633                nullLayouts();
3634                requestLayout();
3635                invalidate();
3636            }
3637        }
3638    }
3639
3640    /**
3641     * Returns whether the text is allowed to be wider than the View is.
3642     * If false, the text will be wrapped to the width of the View.
3643     *
3644     * @attr ref android.R.styleable#TextView_scrollHorizontally
3645     * @hide
3646     */
3647    public boolean getHorizontallyScrolling() {
3648        return mHorizontallyScrolling;
3649    }
3650
3651    /**
3652     * Makes the TextView at least this many lines tall.
3653     *
3654     * Setting this value overrides any other (minimum) height setting. A single line TextView will
3655     * set this value to 1.
3656     *
3657     * @see #getMinLines()
3658     *
3659     * @attr ref android.R.styleable#TextView_minLines
3660     */
3661    @android.view.RemotableViewMethod
3662    public void setMinLines(int minlines) {
3663        mMinimum = minlines;
3664        mMinMode = LINES;
3665
3666        requestLayout();
3667        invalidate();
3668    }
3669
3670    /**
3671     * @return the minimum number of lines displayed in this TextView, or -1 if the minimum
3672     * height was set in pixels instead using {@link #setMinHeight(int) or #setHeight(int)}.
3673     *
3674     * @see #setMinLines(int)
3675     *
3676     * @attr ref android.R.styleable#TextView_minLines
3677     */
3678    public int getMinLines() {
3679        return mMinMode == LINES ? mMinimum : -1;
3680    }
3681
3682    /**
3683     * Makes the TextView at least this many pixels tall.
3684     *
3685     * Setting this value overrides any other (minimum) number of lines setting.
3686     *
3687     * @attr ref android.R.styleable#TextView_minHeight
3688     */
3689    @android.view.RemotableViewMethod
3690    public void setMinHeight(int minHeight) {
3691        mMinimum = minHeight;
3692        mMinMode = PIXELS;
3693
3694        requestLayout();
3695        invalidate();
3696    }
3697
3698    /**
3699     * @return the minimum height of this TextView expressed in pixels, or -1 if the minimum
3700     * height was set in number of lines instead using {@link #setMinLines(int) or #setLines(int)}.
3701     *
3702     * @see #setMinHeight(int)
3703     *
3704     * @attr ref android.R.styleable#TextView_minHeight
3705     */
3706    public int getMinHeight() {
3707        return mMinMode == PIXELS ? mMinimum : -1;
3708    }
3709
3710    /**
3711     * Makes the TextView at most this many lines tall.
3712     *
3713     * Setting this value overrides any other (maximum) height setting.
3714     *
3715     * @attr ref android.R.styleable#TextView_maxLines
3716     */
3717    @android.view.RemotableViewMethod
3718    public void setMaxLines(int maxlines) {
3719        mMaximum = maxlines;
3720        mMaxMode = LINES;
3721
3722        requestLayout();
3723        invalidate();
3724    }
3725
3726    /**
3727     * @return the maximum number of lines displayed in this TextView, or -1 if the maximum
3728     * height was set in pixels instead using {@link #setMaxHeight(int) or #setHeight(int)}.
3729     *
3730     * @see #setMaxLines(int)
3731     *
3732     * @attr ref android.R.styleable#TextView_maxLines
3733     */
3734    public int getMaxLines() {
3735        return mMaxMode == LINES ? mMaximum : -1;
3736    }
3737
3738    /**
3739     * Makes the TextView at most this many pixels tall.  This option is mutually exclusive with the
3740     * {@link #setMaxLines(int)} method.
3741     *
3742     * Setting this value overrides any other (maximum) number of lines setting.
3743     *
3744     * @attr ref android.R.styleable#TextView_maxHeight
3745     */
3746    @android.view.RemotableViewMethod
3747    public void setMaxHeight(int maxHeight) {
3748        mMaximum = maxHeight;
3749        mMaxMode = PIXELS;
3750
3751        requestLayout();
3752        invalidate();
3753    }
3754
3755    /**
3756     * @return the maximum height of this TextView expressed in pixels, or -1 if the maximum
3757     * height was set in number of lines instead using {@link #setMaxLines(int) or #setLines(int)}.
3758     *
3759     * @see #setMaxHeight(int)
3760     *
3761     * @attr ref android.R.styleable#TextView_maxHeight
3762     */
3763    public int getMaxHeight() {
3764        return mMaxMode == PIXELS ? mMaximum : -1;
3765    }
3766
3767    /**
3768     * Makes the TextView exactly this many lines tall.
3769     *
3770     * Note that setting this value overrides any other (minimum / maximum) number of lines or
3771     * height setting. A single line TextView will set this value to 1.
3772     *
3773     * @attr ref android.R.styleable#TextView_lines
3774     */
3775    @android.view.RemotableViewMethod
3776    public void setLines(int lines) {
3777        mMaximum = mMinimum = lines;
3778        mMaxMode = mMinMode = LINES;
3779
3780        requestLayout();
3781        invalidate();
3782    }
3783
3784    /**
3785     * Makes the TextView exactly this many pixels tall.
3786     * You could do the same thing by specifying this number in the
3787     * LayoutParams.
3788     *
3789     * Note that setting this value overrides any other (minimum / maximum) number of lines or
3790     * height setting.
3791     *
3792     * @attr ref android.R.styleable#TextView_height
3793     */
3794    @android.view.RemotableViewMethod
3795    public void setHeight(int pixels) {
3796        mMaximum = mMinimum = pixels;
3797        mMaxMode = mMinMode = PIXELS;
3798
3799        requestLayout();
3800        invalidate();
3801    }
3802
3803    /**
3804     * Makes the TextView at least this many ems wide
3805     *
3806     * @attr ref android.R.styleable#TextView_minEms
3807     */
3808    @android.view.RemotableViewMethod
3809    public void setMinEms(int minems) {
3810        mMinWidth = minems;
3811        mMinWidthMode = EMS;
3812
3813        requestLayout();
3814        invalidate();
3815    }
3816
3817    /**
3818     * @return the minimum width of the TextView, expressed in ems or -1 if the minimum width
3819     * was set in pixels instead (using {@link #setMinWidth(int)} or {@link #setWidth(int)}).
3820     *
3821     * @see #setMinEms(int)
3822     * @see #setEms(int)
3823     *
3824     * @attr ref android.R.styleable#TextView_minEms
3825     */
3826    public int getMinEms() {
3827        return mMinWidthMode == EMS ? mMinWidth : -1;
3828    }
3829
3830    /**
3831     * Makes the TextView at least this many pixels wide
3832     *
3833     * @attr ref android.R.styleable#TextView_minWidth
3834     */
3835    @android.view.RemotableViewMethod
3836    public void setMinWidth(int minpixels) {
3837        mMinWidth = minpixels;
3838        mMinWidthMode = PIXELS;
3839
3840        requestLayout();
3841        invalidate();
3842    }
3843
3844    /**
3845     * @return the minimum width of the TextView, in pixels or -1 if the minimum width
3846     * was set in ems instead (using {@link #setMinEms(int)} or {@link #setEms(int)}).
3847     *
3848     * @see #setMinWidth(int)
3849     * @see #setWidth(int)
3850     *
3851     * @attr ref android.R.styleable#TextView_minWidth
3852     */
3853    public int getMinWidth() {
3854        return mMinWidthMode == PIXELS ? mMinWidth : -1;
3855    }
3856
3857    /**
3858     * Makes the TextView at most this many ems wide
3859     *
3860     * @attr ref android.R.styleable#TextView_maxEms
3861     */
3862    @android.view.RemotableViewMethod
3863    public void setMaxEms(int maxems) {
3864        mMaxWidth = maxems;
3865        mMaxWidthMode = EMS;
3866
3867        requestLayout();
3868        invalidate();
3869    }
3870
3871    /**
3872     * @return the maximum width of the TextView, expressed in ems or -1 if the maximum width
3873     * was set in pixels instead (using {@link #setMaxWidth(int)} or {@link #setWidth(int)}).
3874     *
3875     * @see #setMaxEms(int)
3876     * @see #setEms(int)
3877     *
3878     * @attr ref android.R.styleable#TextView_maxEms
3879     */
3880    public int getMaxEms() {
3881        return mMaxWidthMode == EMS ? mMaxWidth : -1;
3882    }
3883
3884    /**
3885     * Makes the TextView at most this many pixels wide
3886     *
3887     * @attr ref android.R.styleable#TextView_maxWidth
3888     */
3889    @android.view.RemotableViewMethod
3890    public void setMaxWidth(int maxpixels) {
3891        mMaxWidth = maxpixels;
3892        mMaxWidthMode = PIXELS;
3893
3894        requestLayout();
3895        invalidate();
3896    }
3897
3898    /**
3899     * @return the maximum width of the TextView, in pixels or -1 if the maximum width
3900     * was set in ems instead (using {@link #setMaxEms(int)} or {@link #setEms(int)}).
3901     *
3902     * @see #setMaxWidth(int)
3903     * @see #setWidth(int)
3904     *
3905     * @attr ref android.R.styleable#TextView_maxWidth
3906     */
3907    public int getMaxWidth() {
3908        return mMaxWidthMode == PIXELS ? mMaxWidth : -1;
3909    }
3910
3911    /**
3912     * Makes the TextView exactly this many ems wide
3913     *
3914     * @see #setMaxEms(int)
3915     * @see #setMinEms(int)
3916     * @see #getMinEms()
3917     * @see #getMaxEms()
3918     *
3919     * @attr ref android.R.styleable#TextView_ems
3920     */
3921    @android.view.RemotableViewMethod
3922    public void setEms(int ems) {
3923        mMaxWidth = mMinWidth = ems;
3924        mMaxWidthMode = mMinWidthMode = EMS;
3925
3926        requestLayout();
3927        invalidate();
3928    }
3929
3930    /**
3931     * Makes the TextView exactly this many pixels wide.
3932     * You could do the same thing by specifying this number in the
3933     * LayoutParams.
3934     *
3935     * @see #setMaxWidth(int)
3936     * @see #setMinWidth(int)
3937     * @see #getMinWidth()
3938     * @see #getMaxWidth()
3939     *
3940     * @attr ref android.R.styleable#TextView_width
3941     */
3942    @android.view.RemotableViewMethod
3943    public void setWidth(int pixels) {
3944        mMaxWidth = mMinWidth = pixels;
3945        mMaxWidthMode = mMinWidthMode = PIXELS;
3946
3947        requestLayout();
3948        invalidate();
3949    }
3950
3951    /**
3952     * Sets line spacing for this TextView.  Each line will have its height
3953     * multiplied by <code>mult</code> and have <code>add</code> added to it.
3954     *
3955     * @attr ref android.R.styleable#TextView_lineSpacingExtra
3956     * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
3957     */
3958    public void setLineSpacing(float add, float mult) {
3959        if (mSpacingAdd != add || mSpacingMult != mult) {
3960            mSpacingAdd = add;
3961            mSpacingMult = mult;
3962
3963            if (mLayout != null) {
3964                nullLayouts();
3965                requestLayout();
3966                invalidate();
3967            }
3968        }
3969    }
3970
3971    /**
3972     * Gets the line spacing multiplier
3973     *
3974     * @return the value by which each line's height is multiplied to get its actual height.
3975     *
3976     * @see #setLineSpacing(float, float)
3977     * @see #getLineSpacingExtra()
3978     *
3979     * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
3980     */
3981    public float getLineSpacingMultiplier() {
3982        return mSpacingMult;
3983    }
3984
3985    /**
3986     * Gets the line spacing extra space
3987     *
3988     * @return the extra space that is added to the height of each lines of this TextView.
3989     *
3990     * @see #setLineSpacing(float, float)
3991     * @see #getLineSpacingMultiplier()
3992     *
3993     * @attr ref android.R.styleable#TextView_lineSpacingExtra
3994     */
3995    public float getLineSpacingExtra() {
3996        return mSpacingAdd;
3997    }
3998
3999    /**
4000     * Convenience method: Append the specified text to the TextView's
4001     * display buffer, upgrading it to BufferType.EDITABLE if it was
4002     * not already editable.
4003     */
4004    public final void append(CharSequence text) {
4005        append(text, 0, text.length());
4006    }
4007
4008    /**
4009     * Convenience method: Append the specified text slice to the TextView's
4010     * display buffer, upgrading it to BufferType.EDITABLE if it was
4011     * not already editable.
4012     */
4013    public void append(CharSequence text, int start, int end) {
4014        if (!(mText instanceof Editable)) {
4015            setText(mText, BufferType.EDITABLE);
4016        }
4017
4018        ((Editable) mText).append(text, start, end);
4019
4020        boolean hasClickableSpans = false;
4021        if (mAutoLinkMask != 0) {
4022            hasClickableSpans = Linkify.addLinks((Spannable) mText, mAutoLinkMask);
4023        } else if (mLinksClickable && text instanceof Spanned) {
4024            ClickableSpan[] clickableSpans =
4025                    ((Spanned) text).getSpans(0, text.length(), ClickableSpan.class);
4026            hasClickableSpans = clickableSpans != null && clickableSpans.length > 0;
4027        }
4028
4029        // Do not change the movement method for text that supports text selection as it
4030        // would prevent an arbitrary cursor displacement.
4031        if (hasClickableSpans && mLinksClickable && !textCanBeSelected()) {
4032            setMovementMethod(LinkMovementMethod.getInstance());
4033        }
4034    }
4035
4036    private void updateTextColors() {
4037        boolean inval = false;
4038        int color = mTextColor.getColorForState(getDrawableState(), 0);
4039        if (color != mCurTextColor) {
4040            mCurTextColor = color;
4041            inval = true;
4042        }
4043        if (mLinkTextColor != null) {
4044            color = mLinkTextColor.getColorForState(getDrawableState(), 0);
4045            if (color != mTextPaint.linkColor) {
4046                mTextPaint.linkColor = color;
4047                inval = true;
4048            }
4049        }
4050        if (mHintTextColor != null) {
4051            color = mHintTextColor.getColorForState(getDrawableState(), 0);
4052            if (color != mCurHintTextColor) {
4053                mCurHintTextColor = color;
4054                if (mText.length() == 0) {
4055                    inval = true;
4056                }
4057            }
4058        }
4059        if (inval) {
4060            // Text needs to be redrawn with the new color
4061            if (mEditor != null) mEditor.invalidateTextDisplayList();
4062            invalidate();
4063        }
4064    }
4065
4066    @Override
4067    protected void drawableStateChanged() {
4068        super.drawableStateChanged();
4069
4070        if (mTextColor != null && mTextColor.isStateful()
4071                || (mHintTextColor != null && mHintTextColor.isStateful())
4072                || (mLinkTextColor != null && mLinkTextColor.isStateful())) {
4073            updateTextColors();
4074        }
4075
4076        if (mDrawables != null) {
4077            final int[] state = getDrawableState();
4078            for (Drawable dr : mDrawables.mShowing) {
4079                if (dr != null && dr.isStateful() && dr.setState(state)) {
4080                    invalidateDrawable(dr);
4081                }
4082            }
4083        }
4084    }
4085
4086    @Override
4087    public void drawableHotspotChanged(float x, float y) {
4088        super.drawableHotspotChanged(x, y);
4089
4090        if (mDrawables != null) {
4091            for (Drawable dr : mDrawables.mShowing) {
4092                if (dr != null) {
4093                    dr.setHotspot(x, y);
4094                }
4095            }
4096        }
4097    }
4098
4099    @Override
4100    public Parcelable onSaveInstanceState() {
4101        Parcelable superState = super.onSaveInstanceState();
4102
4103        // Save state if we are forced to
4104        final boolean freezesText = getFreezesText();
4105        boolean hasSelection = false;
4106        int start = -1;
4107        int end = -1;
4108
4109        if (mText != null) {
4110            start = getSelectionStart();
4111            end = getSelectionEnd();
4112            if (start >= 0 || end >= 0) {
4113                // Or save state if there is a selection
4114                hasSelection = true;
4115            }
4116        }
4117
4118        if (freezesText || hasSelection) {
4119            SavedState ss = new SavedState(superState);
4120
4121            if (freezesText) {
4122                if (mText instanceof Spanned) {
4123                    final Spannable sp = new SpannableStringBuilder(mText);
4124
4125                    if (mEditor != null) {
4126                        removeMisspelledSpans(sp);
4127                        sp.removeSpan(mEditor.mSuggestionRangeSpan);
4128                    }
4129
4130                    ss.text = sp;
4131                } else {
4132                    ss.text = mText.toString();
4133                }
4134            }
4135
4136            if (hasSelection) {
4137                // XXX Should also save the current scroll position!
4138                ss.selStart = start;
4139                ss.selEnd = end;
4140            }
4141
4142            if (isFocused() && start >= 0 && end >= 0) {
4143                ss.frozenWithFocus = true;
4144            }
4145
4146            ss.error = getError();
4147
4148            if (mEditor != null) {
4149                ss.editorState = mEditor.saveInstanceState();
4150            }
4151            return ss;
4152        }
4153
4154        return superState;
4155    }
4156
4157    void removeMisspelledSpans(Spannable spannable) {
4158        SuggestionSpan[] suggestionSpans = spannable.getSpans(0, spannable.length(),
4159                SuggestionSpan.class);
4160        for (int i = 0; i < suggestionSpans.length; i++) {
4161            int flags = suggestionSpans[i].getFlags();
4162            if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0
4163                    && (flags & SuggestionSpan.FLAG_MISSPELLED) != 0) {
4164                spannable.removeSpan(suggestionSpans[i]);
4165            }
4166        }
4167    }
4168
4169    @Override
4170    public void onRestoreInstanceState(Parcelable state) {
4171        if (!(state instanceof SavedState)) {
4172            super.onRestoreInstanceState(state);
4173            return;
4174        }
4175
4176        SavedState ss = (SavedState)state;
4177        super.onRestoreInstanceState(ss.getSuperState());
4178
4179        // XXX restore buffer type too, as well as lots of other stuff
4180        if (ss.text != null) {
4181            setText(ss.text);
4182        }
4183
4184        if (ss.selStart >= 0 && ss.selEnd >= 0) {
4185            if (mText instanceof Spannable) {
4186                int len = mText.length();
4187
4188                if (ss.selStart > len || ss.selEnd > len) {
4189                    String restored = "";
4190
4191                    if (ss.text != null) {
4192                        restored = "(restored) ";
4193                    }
4194
4195                    Log.e(LOG_TAG, "Saved cursor position " + ss.selStart +
4196                          "/" + ss.selEnd + " out of range for " + restored +
4197                          "text " + mText);
4198                } else {
4199                    Selection.setSelection((Spannable) mText, ss.selStart, ss.selEnd);
4200
4201                    if (ss.frozenWithFocus) {
4202                        createEditorIfNeeded();
4203                        mEditor.mFrozenWithFocus = true;
4204                    }
4205                }
4206            }
4207        }
4208
4209        if (ss.error != null) {
4210            final CharSequence error = ss.error;
4211            // Display the error later, after the first layout pass
4212            post(new Runnable() {
4213                public void run() {
4214                    if (mEditor == null || !mEditor.mErrorWasChanged) {
4215                        setError(error);
4216                    }
4217                }
4218            });
4219        }
4220
4221        if (ss.editorState != null) {
4222            createEditorIfNeeded();
4223            mEditor.restoreInstanceState(ss.editorState);
4224        }
4225    }
4226
4227    /**
4228     * Control whether this text view saves its entire text contents when
4229     * freezing to an icicle, in addition to dynamic state such as cursor
4230     * position.  By default this is false, not saving the text.  Set to true
4231     * if the text in the text view is not being saved somewhere else in
4232     * persistent storage (such as in a content provider) so that if the
4233     * view is later thawed the user will not lose their data. For
4234     * {@link android.widget.EditText} it is always enabled, regardless of
4235     * the value of the attribute.
4236     *
4237     * @param freezesText Controls whether a frozen icicle should include the
4238     * entire text data: true to include it, false to not.
4239     *
4240     * @attr ref android.R.styleable#TextView_freezesText
4241     */
4242    @android.view.RemotableViewMethod
4243    public void setFreezesText(boolean freezesText) {
4244        mFreezesText = freezesText;
4245    }
4246
4247    /**
4248     * Return whether this text view is including its entire text contents
4249     * in frozen icicles. For {@link android.widget.EditText} it always returns true.
4250     *
4251     * @return Returns true if text is included, false if it isn't.
4252     *
4253     * @see #setFreezesText
4254     */
4255    public boolean getFreezesText() {
4256        return mFreezesText;
4257    }
4258
4259    ///////////////////////////////////////////////////////////////////////////
4260
4261    /**
4262     * Sets the Factory used to create new Editables.
4263     */
4264    public final void setEditableFactory(Editable.Factory factory) {
4265        mEditableFactory = factory;
4266        setText(mText);
4267    }
4268
4269    /**
4270     * Sets the Factory used to create new Spannables.
4271     */
4272    public final void setSpannableFactory(Spannable.Factory factory) {
4273        mSpannableFactory = factory;
4274        setText(mText);
4275    }
4276
4277    /**
4278     * Sets the string value of the TextView. TextView <em>does not</em> accept
4279     * HTML-like formatting, which you can do with text strings in XML resource files.
4280     * To style your strings, attach android.text.style.* objects to a
4281     * {@link android.text.SpannableString SpannableString}, or see the
4282     * <a href="{@docRoot}guide/topics/resources/available-resources.html#stringresources">
4283     * Available Resource Types</a> documentation for an example of setting
4284     * formatted text in the XML resource file.
4285     *
4286     * @attr ref android.R.styleable#TextView_text
4287     */
4288    @android.view.RemotableViewMethod
4289    public final void setText(CharSequence text) {
4290        setText(text, mBufferType);
4291    }
4292
4293    /**
4294     * Like {@link #setText(CharSequence)},
4295     * except that the cursor position (if any) is retained in the new text.
4296     *
4297     * @param text The new text to place in the text view.
4298     *
4299     * @see #setText(CharSequence)
4300     */
4301    @android.view.RemotableViewMethod
4302    public final void setTextKeepState(CharSequence text) {
4303        setTextKeepState(text, mBufferType);
4304    }
4305
4306    /**
4307     * Sets the text that this TextView is to display (see
4308     * {@link #setText(CharSequence)}) and also sets whether it is stored
4309     * in a styleable/spannable buffer and whether it is editable.
4310     *
4311     * @attr ref android.R.styleable#TextView_text
4312     * @attr ref android.R.styleable#TextView_bufferType
4313     */
4314    public void setText(CharSequence text, BufferType type) {
4315        setText(text, type, true, 0);
4316
4317        if (mCharWrapper != null) {
4318            mCharWrapper.mChars = null;
4319        }
4320    }
4321
4322    private void setText(CharSequence text, BufferType type,
4323                         boolean notifyBefore, int oldlen) {
4324        if (text == null) {
4325            text = "";
4326        }
4327
4328        // If suggestions are not enabled, remove the suggestion spans from the text
4329        if (!isSuggestionsEnabled()) {
4330            text = removeSuggestionSpans(text);
4331        }
4332
4333        if (!mUserSetTextScaleX) mTextPaint.setTextScaleX(1.0f);
4334
4335        if (text instanceof Spanned &&
4336            ((Spanned) text).getSpanStart(TextUtils.TruncateAt.MARQUEE) >= 0) {
4337            if (ViewConfiguration.get(mContext).isFadingMarqueeEnabled()) {
4338                setHorizontalFadingEdgeEnabled(true);
4339                mMarqueeFadeMode = MARQUEE_FADE_NORMAL;
4340            } else {
4341                setHorizontalFadingEdgeEnabled(false);
4342                mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
4343            }
4344            setEllipsize(TextUtils.TruncateAt.MARQUEE);
4345        }
4346
4347        int n = mFilters.length;
4348        for (int i = 0; i < n; i++) {
4349            CharSequence out = mFilters[i].filter(text, 0, text.length(), EMPTY_SPANNED, 0, 0);
4350            if (out != null) {
4351                text = out;
4352            }
4353        }
4354
4355        if (notifyBefore) {
4356            if (mText != null) {
4357                oldlen = mText.length();
4358                sendBeforeTextChanged(mText, 0, oldlen, text.length());
4359            } else {
4360                sendBeforeTextChanged("", 0, 0, text.length());
4361            }
4362        }
4363
4364        boolean needEditableForNotification = false;
4365
4366        if (mListeners != null && mListeners.size() != 0) {
4367            needEditableForNotification = true;
4368        }
4369
4370        if (type == BufferType.EDITABLE || getKeyListener() != null ||
4371                needEditableForNotification) {
4372            createEditorIfNeeded();
4373            mEditor.forgetUndoRedo();
4374            Editable t = mEditableFactory.newEditable(text);
4375            text = t;
4376            setFilters(t, mFilters);
4377            InputMethodManager imm = InputMethodManager.peekInstance();
4378            if (imm != null) imm.restartInput(this);
4379        } else if (type == BufferType.SPANNABLE || mMovement != null) {
4380            text = mSpannableFactory.newSpannable(text);
4381        } else if (!(text instanceof CharWrapper)) {
4382            text = TextUtils.stringOrSpannedString(text);
4383        }
4384
4385        boolean hasClickableSpans = false;
4386        if (mAutoLinkMask != 0) {
4387            Spannable s2;
4388
4389            if (type == BufferType.EDITABLE || text instanceof Spannable) {
4390                s2 = (Spannable) text;
4391            } else {
4392                s2 = mSpannableFactory.newSpannable(text);
4393            }
4394
4395            hasClickableSpans = Linkify.addLinks(s2, mAutoLinkMask);
4396            if (hasClickableSpans) {
4397                text = s2;
4398            }
4399        } else if (mLinksClickable && text instanceof Spanned) {
4400            ClickableSpan[] clickableSpans =
4401                    ((Spanned) text).getSpans(0, text.length(), ClickableSpan.class);
4402            hasClickableSpans = clickableSpans != null && clickableSpans.length > 0;
4403            if (hasClickableSpans && !(text instanceof Spannable)) {
4404                text = mSpannableFactory.newSpannable(text);
4405            }
4406        }
4407
4408        if (hasClickableSpans) {
4409            type = (type == BufferType.EDITABLE) ? BufferType.EDITABLE : BufferType.SPANNABLE;
4410            /*
4411             * We must go ahead and set the text before changing the
4412             * movement method, because setMovementMethod() may call
4413             * setText() again to try to upgrade the buffer type.
4414             */
4415            mText = text;
4416
4417            // Do not change the movement method for text that supports text selection as it
4418            // would prevent an arbitrary cursor displacement.
4419            if (mLinksClickable && !textCanBeSelected()) {
4420                setMovementMethod(LinkMovementMethod.getInstance());
4421            }
4422        }
4423
4424        mBufferType = type;
4425        mText = text;
4426
4427        if (mTransformation == null) {
4428            mTransformed = text;
4429        } else {
4430            mTransformed = mTransformation.getTransformation(text, this);
4431        }
4432
4433        final int textLength = text.length();
4434
4435        if (text instanceof Spannable && !mAllowTransformationLengthChange) {
4436            Spannable sp = (Spannable) text;
4437
4438            // Remove any ChangeWatchers that might have come from other TextViews.
4439            final ChangeWatcher[] watchers = sp.getSpans(0, sp.length(), ChangeWatcher.class);
4440            final int count = watchers.length;
4441            for (int i = 0; i < count; i++) {
4442                sp.removeSpan(watchers[i]);
4443            }
4444
4445            if (mChangeWatcher == null) mChangeWatcher = new ChangeWatcher();
4446
4447            sp.setSpan(mChangeWatcher, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE |
4448                       (CHANGE_WATCHER_PRIORITY << Spanned.SPAN_PRIORITY_SHIFT));
4449
4450            if (mEditor != null) mEditor.addSpanWatchers(sp);
4451
4452            if (mTransformation != null) {
4453                sp.setSpan(mTransformation, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
4454            }
4455
4456            if (mMovement != null) {
4457                mMovement.initialize(this, (Spannable) text);
4458
4459                /*
4460                 * Initializing the movement method will have set the
4461                 * selection, so reset mSelectionMoved to keep that from
4462                 * interfering with the normal on-focus selection-setting.
4463                 */
4464                if (mEditor != null) mEditor.mSelectionMoved = false;
4465            }
4466        }
4467
4468        if (mLayout != null) {
4469            checkForRelayout();
4470        }
4471
4472        sendOnTextChanged(text, 0, oldlen, textLength);
4473        onTextChanged(text, 0, oldlen, textLength);
4474
4475        notifyViewAccessibilityStateChangedIfNeeded(AccessibilityEvent.CONTENT_CHANGE_TYPE_TEXT);
4476
4477        if (needEditableForNotification) {
4478            sendAfterTextChanged((Editable) text);
4479        }
4480
4481        // SelectionModifierCursorController depends on textCanBeSelected, which depends on text
4482        if (mEditor != null) mEditor.prepareCursorControllers();
4483    }
4484
4485    /**
4486     * Sets the TextView to display the specified slice of the specified
4487     * char array.  You must promise that you will not change the contents
4488     * of the array except for right before another call to setText(),
4489     * since the TextView has no way to know that the text
4490     * has changed and that it needs to invalidate and re-layout.
4491     */
4492    public final void setText(char[] text, int start, int len) {
4493        int oldlen = 0;
4494
4495        if (start < 0 || len < 0 || start + len > text.length) {
4496            throw new IndexOutOfBoundsException(start + ", " + len);
4497        }
4498
4499        /*
4500         * We must do the before-notification here ourselves because if
4501         * the old text is a CharWrapper we destroy it before calling
4502         * into the normal path.
4503         */
4504        if (mText != null) {
4505            oldlen = mText.length();
4506            sendBeforeTextChanged(mText, 0, oldlen, len);
4507        } else {
4508            sendBeforeTextChanged("", 0, 0, len);
4509        }
4510
4511        if (mCharWrapper == null) {
4512            mCharWrapper = new CharWrapper(text, start, len);
4513        } else {
4514            mCharWrapper.set(text, start, len);
4515        }
4516
4517        setText(mCharWrapper, mBufferType, false, oldlen);
4518    }
4519
4520    /**
4521     * Like {@link #setText(CharSequence, android.widget.TextView.BufferType)},
4522     * except that the cursor position (if any) is retained in the new text.
4523     *
4524     * @see #setText(CharSequence, android.widget.TextView.BufferType)
4525     */
4526    public final void setTextKeepState(CharSequence text, BufferType type) {
4527        int start = getSelectionStart();
4528        int end = getSelectionEnd();
4529        int len = text.length();
4530
4531        setText(text, type);
4532
4533        if (start >= 0 || end >= 0) {
4534            if (mText instanceof Spannable) {
4535                Selection.setSelection((Spannable) mText,
4536                                       Math.max(0, Math.min(start, len)),
4537                                       Math.max(0, Math.min(end, len)));
4538            }
4539        }
4540    }
4541
4542    @android.view.RemotableViewMethod
4543    public final void setText(@StringRes int resid) {
4544        setText(getContext().getResources().getText(resid));
4545    }
4546
4547    public final void setText(@StringRes int resid, BufferType type) {
4548        setText(getContext().getResources().getText(resid), type);
4549    }
4550
4551    /**
4552     * Sets the text to be displayed when the text of the TextView is empty.
4553     * Null means to use the normal empty text. The hint does not currently
4554     * participate in determining the size of the view.
4555     *
4556     * @attr ref android.R.styleable#TextView_hint
4557     */
4558    @android.view.RemotableViewMethod
4559    public final void setHint(CharSequence hint) {
4560        mHint = TextUtils.stringOrSpannedString(hint);
4561
4562        if (mLayout != null) {
4563            checkForRelayout();
4564        }
4565
4566        if (mText.length() == 0) {
4567            invalidate();
4568        }
4569
4570        // Invalidate display list if hint is currently used
4571        if (mEditor != null && mText.length() == 0 && mHint != null) {
4572            mEditor.invalidateTextDisplayList();
4573        }
4574    }
4575
4576    /**
4577     * Sets the text to be displayed when the text of the TextView is empty,
4578     * from a resource.
4579     *
4580     * @attr ref android.R.styleable#TextView_hint
4581     */
4582    @android.view.RemotableViewMethod
4583    public final void setHint(@StringRes int resid) {
4584        setHint(getContext().getResources().getText(resid));
4585    }
4586
4587    /**
4588     * Returns the hint that is displayed when the text of the TextView
4589     * is empty.
4590     *
4591     * @attr ref android.R.styleable#TextView_hint
4592     */
4593    @ViewDebug.CapturedViewProperty
4594    public CharSequence getHint() {
4595        return mHint;
4596    }
4597
4598    boolean isSingleLine() {
4599        return mSingleLine;
4600    }
4601
4602    private static boolean isMultilineInputType(int type) {
4603        return (type & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE)) ==
4604            (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE);
4605    }
4606
4607    /**
4608     * Removes the suggestion spans.
4609     */
4610    CharSequence removeSuggestionSpans(CharSequence text) {
4611       if (text instanceof Spanned) {
4612           Spannable spannable;
4613           if (text instanceof Spannable) {
4614               spannable = (Spannable) text;
4615           } else {
4616               spannable = new SpannableString(text);
4617               text = spannable;
4618           }
4619
4620           SuggestionSpan[] spans = spannable.getSpans(0, text.length(), SuggestionSpan.class);
4621           for (int i = 0; i < spans.length; i++) {
4622               spannable.removeSpan(spans[i]);
4623           }
4624       }
4625       return text;
4626    }
4627
4628    /**
4629     * Set the type of the content with a constant as defined for {@link EditorInfo#inputType}. This
4630     * will take care of changing the key listener, by calling {@link #setKeyListener(KeyListener)},
4631     * to match the given content type.  If the given content type is {@link EditorInfo#TYPE_NULL}
4632     * then a soft keyboard will not be displayed for this text view.
4633     *
4634     * Note that the maximum number of displayed lines (see {@link #setMaxLines(int)}) will be
4635     * modified if you change the {@link EditorInfo#TYPE_TEXT_FLAG_MULTI_LINE} flag of the input
4636     * type.
4637     *
4638     * @see #getInputType()
4639     * @see #setRawInputType(int)
4640     * @see android.text.InputType
4641     * @attr ref android.R.styleable#TextView_inputType
4642     */
4643    public void setInputType(int type) {
4644        final boolean wasPassword = isPasswordInputType(getInputType());
4645        final boolean wasVisiblePassword = isVisiblePasswordInputType(getInputType());
4646        setInputType(type, false);
4647        final boolean isPassword = isPasswordInputType(type);
4648        final boolean isVisiblePassword = isVisiblePasswordInputType(type);
4649        boolean forceUpdate = false;
4650        if (isPassword) {
4651            setTransformationMethod(PasswordTransformationMethod.getInstance());
4652            setTypefaceFromAttrs(null /* fontFamily */, MONOSPACE, 0);
4653        } else if (isVisiblePassword) {
4654            if (mTransformation == PasswordTransformationMethod.getInstance()) {
4655                forceUpdate = true;
4656            }
4657            setTypefaceFromAttrs(null /* fontFamily */, MONOSPACE, 0);
4658        } else if (wasPassword || wasVisiblePassword) {
4659            // not in password mode, clean up typeface and transformation
4660            setTypefaceFromAttrs(null /* fontFamily */, -1, -1);
4661            if (mTransformation == PasswordTransformationMethod.getInstance()) {
4662                forceUpdate = true;
4663            }
4664        }
4665
4666        boolean singleLine = !isMultilineInputType(type);
4667
4668        // We need to update the single line mode if it has changed or we
4669        // were previously in password mode.
4670        if (mSingleLine != singleLine || forceUpdate) {
4671            // Change single line mode, but only change the transformation if
4672            // we are not in password mode.
4673            applySingleLine(singleLine, !isPassword, true);
4674        }
4675
4676        if (!isSuggestionsEnabled()) {
4677            mText = removeSuggestionSpans(mText);
4678        }
4679
4680        InputMethodManager imm = InputMethodManager.peekInstance();
4681        if (imm != null) imm.restartInput(this);
4682    }
4683
4684    /**
4685     * It would be better to rely on the input type for everything. A password inputType should have
4686     * a password transformation. We should hence use isPasswordInputType instead of this method.
4687     *
4688     * We should:
4689     * - Call setInputType in setKeyListener instead of changing the input type directly (which
4690     * would install the correct transformation).
4691     * - Refuse the installation of a non-password transformation in setTransformation if the input
4692     * type is password.
4693     *
4694     * However, this is like this for legacy reasons and we cannot break existing apps. This method
4695     * is useful since it matches what the user can see (obfuscated text or not).
4696     *
4697     * @return true if the current transformation method is of the password type.
4698     */
4699    boolean hasPasswordTransformationMethod() {
4700        return mTransformation instanceof PasswordTransformationMethod;
4701    }
4702
4703    private static boolean isPasswordInputType(int inputType) {
4704        final int variation =
4705                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
4706        return variation
4707                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)
4708                || variation
4709                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD)
4710                || variation
4711                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
4712    }
4713
4714    private static boolean isVisiblePasswordInputType(int inputType) {
4715        final int variation =
4716                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
4717        return variation
4718                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
4719    }
4720
4721    /**
4722     * Directly change the content type integer of the text view, without
4723     * modifying any other state.
4724     * @see #setInputType(int)
4725     * @see android.text.InputType
4726     * @attr ref android.R.styleable#TextView_inputType
4727     */
4728    public void setRawInputType(int type) {
4729        if (type == InputType.TYPE_NULL && mEditor == null) return; //TYPE_NULL is the default value
4730        createEditorIfNeeded();
4731        mEditor.mInputType = type;
4732    }
4733
4734    private void setInputType(int type, boolean direct) {
4735        final int cls = type & EditorInfo.TYPE_MASK_CLASS;
4736        KeyListener input;
4737        if (cls == EditorInfo.TYPE_CLASS_TEXT) {
4738            boolean autotext = (type & EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT) != 0;
4739            TextKeyListener.Capitalize cap;
4740            if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS) != 0) {
4741                cap = TextKeyListener.Capitalize.CHARACTERS;
4742            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS) != 0) {
4743                cap = TextKeyListener.Capitalize.WORDS;
4744            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES) != 0) {
4745                cap = TextKeyListener.Capitalize.SENTENCES;
4746            } else {
4747                cap = TextKeyListener.Capitalize.NONE;
4748            }
4749            input = TextKeyListener.getInstance(autotext, cap);
4750        } else if (cls == EditorInfo.TYPE_CLASS_NUMBER) {
4751            input = DigitsKeyListener.getInstance(
4752                    (type & EditorInfo.TYPE_NUMBER_FLAG_SIGNED) != 0,
4753                    (type & EditorInfo.TYPE_NUMBER_FLAG_DECIMAL) != 0);
4754        } else if (cls == EditorInfo.TYPE_CLASS_DATETIME) {
4755            switch (type & EditorInfo.TYPE_MASK_VARIATION) {
4756                case EditorInfo.TYPE_DATETIME_VARIATION_DATE:
4757                    input = DateKeyListener.getInstance();
4758                    break;
4759                case EditorInfo.TYPE_DATETIME_VARIATION_TIME:
4760                    input = TimeKeyListener.getInstance();
4761                    break;
4762                default:
4763                    input = DateTimeKeyListener.getInstance();
4764                    break;
4765            }
4766        } else if (cls == EditorInfo.TYPE_CLASS_PHONE) {
4767            input = DialerKeyListener.getInstance();
4768        } else {
4769            input = TextKeyListener.getInstance();
4770        }
4771        setRawInputType(type);
4772        if (direct) {
4773            createEditorIfNeeded();
4774            mEditor.mKeyListener = input;
4775        } else {
4776            setKeyListenerOnly(input);
4777        }
4778    }
4779
4780    /**
4781     * Get the type of the editable content.
4782     *
4783     * @see #setInputType(int)
4784     * @see android.text.InputType
4785     */
4786    public int getInputType() {
4787        return mEditor == null ? EditorInfo.TYPE_NULL : mEditor.mInputType;
4788    }
4789
4790    /**
4791     * Change the editor type integer associated with the text view, which
4792     * will be reported to an IME with {@link EditorInfo#imeOptions} when it
4793     * has focus.
4794     * @see #getImeOptions
4795     * @see android.view.inputmethod.EditorInfo
4796     * @attr ref android.R.styleable#TextView_imeOptions
4797     */
4798    public void setImeOptions(int imeOptions) {
4799        createEditorIfNeeded();
4800        mEditor.createInputContentTypeIfNeeded();
4801        mEditor.mInputContentType.imeOptions = imeOptions;
4802    }
4803
4804    /**
4805     * Get the type of the IME editor.
4806     *
4807     * @see #setImeOptions(int)
4808     * @see android.view.inputmethod.EditorInfo
4809     */
4810    public int getImeOptions() {
4811        return mEditor != null && mEditor.mInputContentType != null
4812                ? mEditor.mInputContentType.imeOptions : EditorInfo.IME_NULL;
4813    }
4814
4815    /**
4816     * Change the custom IME action associated with the text view, which
4817     * will be reported to an IME with {@link EditorInfo#actionLabel}
4818     * and {@link EditorInfo#actionId} when it has focus.
4819     * @see #getImeActionLabel
4820     * @see #getImeActionId
4821     * @see android.view.inputmethod.EditorInfo
4822     * @attr ref android.R.styleable#TextView_imeActionLabel
4823     * @attr ref android.R.styleable#TextView_imeActionId
4824     */
4825    public void setImeActionLabel(CharSequence label, int actionId) {
4826        createEditorIfNeeded();
4827        mEditor.createInputContentTypeIfNeeded();
4828        mEditor.mInputContentType.imeActionLabel = label;
4829        mEditor.mInputContentType.imeActionId = actionId;
4830    }
4831
4832    /**
4833     * Get the IME action label previous set with {@link #setImeActionLabel}.
4834     *
4835     * @see #setImeActionLabel
4836     * @see android.view.inputmethod.EditorInfo
4837     */
4838    public CharSequence getImeActionLabel() {
4839        return mEditor != null && mEditor.mInputContentType != null
4840                ? mEditor.mInputContentType.imeActionLabel : null;
4841    }
4842
4843    /**
4844     * Get the IME action ID previous set with {@link #setImeActionLabel}.
4845     *
4846     * @see #setImeActionLabel
4847     * @see android.view.inputmethod.EditorInfo
4848     */
4849    public int getImeActionId() {
4850        return mEditor != null && mEditor.mInputContentType != null
4851                ? mEditor.mInputContentType.imeActionId : 0;
4852    }
4853
4854    /**
4855     * Set a special listener to be called when an action is performed
4856     * on the text view.  This will be called when the enter key is pressed,
4857     * or when an action supplied to the IME is selected by the user.  Setting
4858     * this means that the normal hard key event will not insert a newline
4859     * into the text view, even if it is multi-line; holding down the ALT
4860     * modifier will, however, allow the user to insert a newline character.
4861     */
4862    public void setOnEditorActionListener(OnEditorActionListener l) {
4863        createEditorIfNeeded();
4864        mEditor.createInputContentTypeIfNeeded();
4865        mEditor.mInputContentType.onEditorActionListener = l;
4866    }
4867
4868    /**
4869     * Called when an attached input method calls
4870     * {@link InputConnection#performEditorAction(int)
4871     * InputConnection.performEditorAction()}
4872     * for this text view.  The default implementation will call your action
4873     * listener supplied to {@link #setOnEditorActionListener}, or perform
4874     * a standard operation for {@link EditorInfo#IME_ACTION_NEXT
4875     * EditorInfo.IME_ACTION_NEXT}, {@link EditorInfo#IME_ACTION_PREVIOUS
4876     * EditorInfo.IME_ACTION_PREVIOUS}, or {@link EditorInfo#IME_ACTION_DONE
4877     * EditorInfo.IME_ACTION_DONE}.
4878     *
4879     * <p>For backwards compatibility, if no IME options have been set and the
4880     * text view would not normally advance focus on enter, then
4881     * the NEXT and DONE actions received here will be turned into an enter
4882     * key down/up pair to go through the normal key handling.
4883     *
4884     * @param actionCode The code of the action being performed.
4885     *
4886     * @see #setOnEditorActionListener
4887     */
4888    public void onEditorAction(int actionCode) {
4889        final Editor.InputContentType ict = mEditor == null ? null : mEditor.mInputContentType;
4890        if (ict != null) {
4891            if (ict.onEditorActionListener != null) {
4892                if (ict.onEditorActionListener.onEditorAction(this,
4893                        actionCode, null)) {
4894                    return;
4895                }
4896            }
4897
4898            // This is the handling for some default action.
4899            // Note that for backwards compatibility we don't do this
4900            // default handling if explicit ime options have not been given,
4901            // instead turning this into the normal enter key codes that an
4902            // app may be expecting.
4903            if (actionCode == EditorInfo.IME_ACTION_NEXT) {
4904                View v = focusSearch(FOCUS_FORWARD);
4905                if (v != null) {
4906                    if (!v.requestFocus(FOCUS_FORWARD)) {
4907                        throw new IllegalStateException("focus search returned a view " +
4908                                "that wasn't able to take focus!");
4909                    }
4910                }
4911                return;
4912
4913            } else if (actionCode == EditorInfo.IME_ACTION_PREVIOUS) {
4914                View v = focusSearch(FOCUS_BACKWARD);
4915                if (v != null) {
4916                    if (!v.requestFocus(FOCUS_BACKWARD)) {
4917                        throw new IllegalStateException("focus search returned a view " +
4918                                "that wasn't able to take focus!");
4919                    }
4920                }
4921                return;
4922
4923            } else if (actionCode == EditorInfo.IME_ACTION_DONE) {
4924                InputMethodManager imm = InputMethodManager.peekInstance();
4925                if (imm != null && imm.isActive(this)) {
4926                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
4927                }
4928                return;
4929            }
4930        }
4931
4932        ViewRootImpl viewRootImpl = getViewRootImpl();
4933        if (viewRootImpl != null) {
4934            long eventTime = SystemClock.uptimeMillis();
4935            viewRootImpl.dispatchKeyFromIme(
4936                    new KeyEvent(eventTime, eventTime,
4937                    KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_ENTER, 0, 0,
4938                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
4939                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
4940                    | KeyEvent.FLAG_EDITOR_ACTION));
4941            viewRootImpl.dispatchKeyFromIme(
4942                    new KeyEvent(SystemClock.uptimeMillis(), eventTime,
4943                    KeyEvent.ACTION_UP, KeyEvent.KEYCODE_ENTER, 0, 0,
4944                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
4945                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
4946                    | KeyEvent.FLAG_EDITOR_ACTION));
4947        }
4948    }
4949
4950    /**
4951     * Set the private content type of the text, which is the
4952     * {@link EditorInfo#privateImeOptions EditorInfo.privateImeOptions}
4953     * field that will be filled in when creating an input connection.
4954     *
4955     * @see #getPrivateImeOptions()
4956     * @see EditorInfo#privateImeOptions
4957     * @attr ref android.R.styleable#TextView_privateImeOptions
4958     */
4959    public void setPrivateImeOptions(String type) {
4960        createEditorIfNeeded();
4961        mEditor.createInputContentTypeIfNeeded();
4962        mEditor.mInputContentType.privateImeOptions = type;
4963    }
4964
4965    /**
4966     * Get the private type of the content.
4967     *
4968     * @see #setPrivateImeOptions(String)
4969     * @see EditorInfo#privateImeOptions
4970     */
4971    public String getPrivateImeOptions() {
4972        return mEditor != null && mEditor.mInputContentType != null
4973                ? mEditor.mInputContentType.privateImeOptions : null;
4974    }
4975
4976    /**
4977     * Set the extra input data of the text, which is the
4978     * {@link EditorInfo#extras TextBoxAttribute.extras}
4979     * Bundle that will be filled in when creating an input connection.  The
4980     * given integer is the resource ID of an XML resource holding an
4981     * {@link android.R.styleable#InputExtras &lt;input-extras&gt;} XML tree.
4982     *
4983     * @see #getInputExtras(boolean)
4984     * @see EditorInfo#extras
4985     * @attr ref android.R.styleable#TextView_editorExtras
4986     */
4987    public void setInputExtras(@XmlRes int xmlResId) throws XmlPullParserException, IOException {
4988        createEditorIfNeeded();
4989        XmlResourceParser parser = getResources().getXml(xmlResId);
4990        mEditor.createInputContentTypeIfNeeded();
4991        mEditor.mInputContentType.extras = new Bundle();
4992        getResources().parseBundleExtras(parser, mEditor.mInputContentType.extras);
4993    }
4994
4995    /**
4996     * Retrieve the input extras currently associated with the text view, which
4997     * can be viewed as well as modified.
4998     *
4999     * @param create If true, the extras will be created if they don't already
5000     * exist.  Otherwise, null will be returned if none have been created.
5001     * @see #setInputExtras(int)
5002     * @see EditorInfo#extras
5003     * @attr ref android.R.styleable#TextView_editorExtras
5004     */
5005    public Bundle getInputExtras(boolean create) {
5006        if (mEditor == null && !create) return null;
5007        createEditorIfNeeded();
5008        if (mEditor.mInputContentType == null) {
5009            if (!create) return null;
5010            mEditor.createInputContentTypeIfNeeded();
5011        }
5012        if (mEditor.mInputContentType.extras == null) {
5013            if (!create) return null;
5014            mEditor.mInputContentType.extras = new Bundle();
5015        }
5016        return mEditor.mInputContentType.extras;
5017    }
5018
5019    /**
5020     * Change "hint" locales associated with the text view, which will be reported to an IME with
5021     * {@link EditorInfo#hintLocales} when it has focus.
5022     *
5023     * <p><strong>Note:</strong> If you want new "hint" to take effect immediately you need to
5024     * call {@link InputMethodManager#restartInput(View)}.</p>
5025     * @param hintLocales List of the languages that the user is supposed to switch to no matter
5026     * what input method subtype is currently used. Set {@code null} to clear the current "hint".
5027     * @see #getImeHIntLocales()
5028     * @see android.view.inputmethod.EditorInfo#hintLocales
5029     */
5030    public void setImeHintLocales(@Nullable LocaleList hintLocales) {
5031        createEditorIfNeeded();
5032        mEditor.createInputContentTypeIfNeeded();
5033        mEditor.mInputContentType.imeHintLocales = hintLocales;
5034    }
5035
5036    /**
5037     * @return The current languages list "hint". {@code null} when no "hint" is available.
5038     * @see #setImeHintLocales(LocaleList)
5039     * @see android.view.inputmethod.EditorInfo#hintLocales
5040     */
5041    @Nullable
5042    public LocaleList getImeHintLocales() {
5043        if (mEditor == null) { return null; }
5044        if (mEditor.mInputContentType == null) { return null; }
5045        return mEditor.mInputContentType.imeHintLocales;
5046    }
5047
5048    /**
5049     * Returns the error message that was set to be displayed with
5050     * {@link #setError}, or <code>null</code> if no error was set
5051     * or if it the error was cleared by the widget after user input.
5052     */
5053    public CharSequence getError() {
5054        return mEditor == null ? null : mEditor.mError;
5055    }
5056
5057    /**
5058     * Sets the right-hand compound drawable of the TextView to the "error"
5059     * icon and sets an error message that will be displayed in a popup when
5060     * the TextView has focus.  The icon and error message will be reset to
5061     * null when any key events cause changes to the TextView's text.  If the
5062     * <code>error</code> is <code>null</code>, the error message and icon
5063     * will be cleared.
5064     */
5065    @android.view.RemotableViewMethod
5066    public void setError(CharSequence error) {
5067        if (error == null) {
5068            setError(null, null);
5069        } else {
5070            Drawable dr = getContext().getDrawable(
5071                    com.android.internal.R.drawable.indicator_input_error);
5072
5073            dr.setBounds(0, 0, dr.getIntrinsicWidth(), dr.getIntrinsicHeight());
5074            setError(error, dr);
5075        }
5076    }
5077
5078    /**
5079     * Sets the right-hand compound drawable of the TextView to the specified
5080     * icon and sets an error message that will be displayed in a popup when
5081     * the TextView has focus.  The icon and error message will be reset to
5082     * null when any key events cause changes to the TextView's text.  The
5083     * drawable must already have had {@link Drawable#setBounds} set on it.
5084     * If the <code>error</code> is <code>null</code>, the error message will
5085     * be cleared (and you should provide a <code>null</code> icon as well).
5086     */
5087    public void setError(CharSequence error, Drawable icon) {
5088        createEditorIfNeeded();
5089        mEditor.setError(error, icon);
5090        notifyViewAccessibilityStateChangedIfNeeded(
5091                AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED);
5092    }
5093
5094    @Override
5095    protected boolean setFrame(int l, int t, int r, int b) {
5096        boolean result = super.setFrame(l, t, r, b);
5097
5098        if (mEditor != null) mEditor.setFrame();
5099
5100        restartMarqueeIfNeeded();
5101
5102        return result;
5103    }
5104
5105    private void restartMarqueeIfNeeded() {
5106        if (mRestartMarquee && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
5107            mRestartMarquee = false;
5108            startMarquee();
5109        }
5110    }
5111
5112    /**
5113     * Sets the list of input filters that will be used if the buffer is
5114     * Editable. Has no effect otherwise.
5115     *
5116     * @attr ref android.R.styleable#TextView_maxLength
5117     */
5118    public void setFilters(InputFilter[] filters) {
5119        if (filters == null) {
5120            throw new IllegalArgumentException();
5121        }
5122
5123        mFilters = filters;
5124
5125        if (mText instanceof Editable) {
5126            setFilters((Editable) mText, filters);
5127        }
5128    }
5129
5130    /**
5131     * Sets the list of input filters on the specified Editable,
5132     * and includes mInput in the list if it is an InputFilter.
5133     */
5134    private void setFilters(Editable e, InputFilter[] filters) {
5135        if (mEditor != null) {
5136            final boolean undoFilter = mEditor.mUndoInputFilter != null;
5137            final boolean keyFilter = mEditor.mKeyListener instanceof InputFilter;
5138            int num = 0;
5139            if (undoFilter) num++;
5140            if (keyFilter) num++;
5141            if (num > 0) {
5142                InputFilter[] nf = new InputFilter[filters.length + num];
5143
5144                System.arraycopy(filters, 0, nf, 0, filters.length);
5145                num = 0;
5146                if (undoFilter) {
5147                    nf[filters.length] = mEditor.mUndoInputFilter;
5148                    num++;
5149                }
5150                if (keyFilter) {
5151                    nf[filters.length + num] = (InputFilter) mEditor.mKeyListener;
5152                }
5153
5154                e.setFilters(nf);
5155                return;
5156            }
5157        }
5158        e.setFilters(filters);
5159    }
5160
5161    /**
5162     * Returns the current list of input filters.
5163     *
5164     * @attr ref android.R.styleable#TextView_maxLength
5165     */
5166    public InputFilter[] getFilters() {
5167        return mFilters;
5168    }
5169
5170    /////////////////////////////////////////////////////////////////////////
5171
5172    private int getBoxHeight(Layout l) {
5173        Insets opticalInsets = isLayoutModeOptical(mParent) ? getOpticalInsets() : Insets.NONE;
5174        int padding = (l == mHintLayout) ?
5175                getCompoundPaddingTop() + getCompoundPaddingBottom() :
5176                getExtendedPaddingTop() + getExtendedPaddingBottom();
5177        return getMeasuredHeight() - padding + opticalInsets.top + opticalInsets.bottom;
5178    }
5179
5180    int getVerticalOffset(boolean forceNormal) {
5181        int voffset = 0;
5182        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
5183
5184        Layout l = mLayout;
5185        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
5186            l = mHintLayout;
5187        }
5188
5189        if (gravity != Gravity.TOP) {
5190            int boxht = getBoxHeight(l);
5191            int textht = l.getHeight();
5192
5193            if (textht < boxht) {
5194                if (gravity == Gravity.BOTTOM)
5195                    voffset = boxht - textht;
5196                else // (gravity == Gravity.CENTER_VERTICAL)
5197                    voffset = (boxht - textht) >> 1;
5198            }
5199        }
5200        return voffset;
5201    }
5202
5203    private int getBottomVerticalOffset(boolean forceNormal) {
5204        int voffset = 0;
5205        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
5206
5207        Layout l = mLayout;
5208        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
5209            l = mHintLayout;
5210        }
5211
5212        if (gravity != Gravity.BOTTOM) {
5213            int boxht = getBoxHeight(l);
5214            int textht = l.getHeight();
5215
5216            if (textht < boxht) {
5217                if (gravity == Gravity.TOP)
5218                    voffset = boxht - textht;
5219                else // (gravity == Gravity.CENTER_VERTICAL)
5220                    voffset = (boxht - textht) >> 1;
5221            }
5222        }
5223        return voffset;
5224    }
5225
5226    void invalidateCursorPath() {
5227        if (mHighlightPathBogus) {
5228            invalidateCursor();
5229        } else {
5230            final int horizontalPadding = getCompoundPaddingLeft();
5231            final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
5232
5233            if (mEditor.mCursorCount == 0) {
5234                synchronized (TEMP_RECTF) {
5235                    /*
5236                     * The reason for this concern about the thickness of the
5237                     * cursor and doing the floor/ceil on the coordinates is that
5238                     * some EditTexts (notably textfields in the Browser) have
5239                     * anti-aliased text where not all the characters are
5240                     * necessarily at integer-multiple locations.  This should
5241                     * make sure the entire cursor gets invalidated instead of
5242                     * sometimes missing half a pixel.
5243                     */
5244                    float thick = (float) Math.ceil(mTextPaint.getStrokeWidth());
5245                    if (thick < 1.0f) {
5246                        thick = 1.0f;
5247                    }
5248
5249                    thick /= 2.0f;
5250
5251                    // mHighlightPath is guaranteed to be non null at that point.
5252                    mHighlightPath.computeBounds(TEMP_RECTF, false);
5253
5254                    invalidate((int) Math.floor(horizontalPadding + TEMP_RECTF.left - thick),
5255                            (int) Math.floor(verticalPadding + TEMP_RECTF.top - thick),
5256                            (int) Math.ceil(horizontalPadding + TEMP_RECTF.right + thick),
5257                            (int) Math.ceil(verticalPadding + TEMP_RECTF.bottom + thick));
5258                }
5259            } else {
5260                for (int i = 0; i < mEditor.mCursorCount; i++) {
5261                    Rect bounds = mEditor.mCursorDrawable[i].getBounds();
5262                    invalidate(bounds.left + horizontalPadding, bounds.top + verticalPadding,
5263                            bounds.right + horizontalPadding, bounds.bottom + verticalPadding);
5264                }
5265            }
5266        }
5267    }
5268
5269    void invalidateCursor() {
5270        int where = getSelectionEnd();
5271
5272        invalidateCursor(where, where, where);
5273    }
5274
5275    private void invalidateCursor(int a, int b, int c) {
5276        if (a >= 0 || b >= 0 || c >= 0) {
5277            int start = Math.min(Math.min(a, b), c);
5278            int end = Math.max(Math.max(a, b), c);
5279            invalidateRegion(start, end, true /* Also invalidates blinking cursor */);
5280        }
5281    }
5282
5283    /**
5284     * Invalidates the region of text enclosed between the start and end text offsets.
5285     */
5286    void invalidateRegion(int start, int end, boolean invalidateCursor) {
5287        if (mLayout == null) {
5288            invalidate();
5289        } else {
5290                int lineStart = mLayout.getLineForOffset(start);
5291                int top = mLayout.getLineTop(lineStart);
5292
5293                // This is ridiculous, but the descent from the line above
5294                // can hang down into the line we really want to redraw,
5295                // so we have to invalidate part of the line above to make
5296                // sure everything that needs to be redrawn really is.
5297                // (But not the whole line above, because that would cause
5298                // the same problem with the descenders on the line above it!)
5299                if (lineStart > 0) {
5300                    top -= mLayout.getLineDescent(lineStart - 1);
5301                }
5302
5303                int lineEnd;
5304
5305                if (start == end)
5306                    lineEnd = lineStart;
5307                else
5308                    lineEnd = mLayout.getLineForOffset(end);
5309
5310                int bottom = mLayout.getLineBottom(lineEnd);
5311
5312                // mEditor can be null in case selection is set programmatically.
5313                if (invalidateCursor && mEditor != null) {
5314                    for (int i = 0; i < mEditor.mCursorCount; i++) {
5315                        Rect bounds = mEditor.mCursorDrawable[i].getBounds();
5316                        top = Math.min(top, bounds.top);
5317                        bottom = Math.max(bottom, bounds.bottom);
5318                    }
5319                }
5320
5321                final int compoundPaddingLeft = getCompoundPaddingLeft();
5322                final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
5323
5324                int left, right;
5325                if (lineStart == lineEnd && !invalidateCursor) {
5326                    left = (int) mLayout.getPrimaryHorizontal(start);
5327                    right = (int) (mLayout.getPrimaryHorizontal(end) + 1.0);
5328                    left += compoundPaddingLeft;
5329                    right += compoundPaddingLeft;
5330                } else {
5331                    // Rectangle bounding box when the region spans several lines
5332                    left = compoundPaddingLeft;
5333                    right = getWidth() - getCompoundPaddingRight();
5334                }
5335
5336                invalidate(mScrollX + left, verticalPadding + top,
5337                        mScrollX + right, verticalPadding + bottom);
5338        }
5339    }
5340
5341    private void registerForPreDraw() {
5342        if (!mPreDrawRegistered) {
5343            getViewTreeObserver().addOnPreDrawListener(this);
5344            mPreDrawRegistered = true;
5345        }
5346    }
5347
5348    private void unregisterForPreDraw() {
5349        getViewTreeObserver().removeOnPreDrawListener(this);
5350        mPreDrawRegistered = false;
5351        mPreDrawListenerDetached = false;
5352    }
5353
5354    /**
5355     * {@inheritDoc}
5356     */
5357    public boolean onPreDraw() {
5358        if (mLayout == null) {
5359            assumeLayout();
5360        }
5361
5362        if (mMovement != null) {
5363            /* This code also provides auto-scrolling when a cursor is moved using a
5364             * CursorController (insertion point or selection limits).
5365             * For selection, ensure start or end is visible depending on controller's state.
5366             */
5367            int curs = getSelectionEnd();
5368            // Do not create the controller if it is not already created.
5369            if (mEditor != null && mEditor.mSelectionModifierCursorController != null &&
5370                    mEditor.mSelectionModifierCursorController.isSelectionStartDragged()) {
5371                curs = getSelectionStart();
5372            }
5373
5374            /*
5375             * TODO: This should really only keep the end in view if
5376             * it already was before the text changed.  I'm not sure
5377             * of a good way to tell from here if it was.
5378             */
5379            if (curs < 0 && (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
5380                curs = mText.length();
5381            }
5382
5383            if (curs >= 0) {
5384                bringPointIntoView(curs);
5385            }
5386        } else {
5387            bringTextIntoView();
5388        }
5389
5390        // This has to be checked here since:
5391        // - onFocusChanged cannot start it when focus is given to a view with selected text (after
5392        //   a screen rotation) since layout is not yet initialized at that point.
5393        if (mEditor != null && mEditor.mCreatedWithASelection) {
5394            if (mEditor.extractedTextModeWillBeStarted()) {
5395                mEditor.checkFieldAndSelectCurrentWord();
5396            } else {
5397                mEditor.startSelectionActionMode();
5398            }
5399            mEditor.mCreatedWithASelection = false;
5400        }
5401
5402        unregisterForPreDraw();
5403
5404        return true;
5405    }
5406
5407    @Override
5408    protected void onAttachedToWindow() {
5409        super.onAttachedToWindow();
5410
5411        mTemporaryDetach = false;
5412
5413        if (mEditor != null) mEditor.onAttachedToWindow();
5414
5415        if (mPreDrawListenerDetached) {
5416            getViewTreeObserver().addOnPreDrawListener(this);
5417            mPreDrawListenerDetached = false;
5418        }
5419    }
5420
5421    /** @hide */
5422    @Override
5423    protected void onDetachedFromWindowInternal() {
5424        if (mPreDrawRegistered) {
5425            getViewTreeObserver().removeOnPreDrawListener(this);
5426            mPreDrawListenerDetached = true;
5427        }
5428
5429        resetResolvedDrawables();
5430
5431        if (mEditor != null) mEditor.onDetachedFromWindow();
5432
5433        super.onDetachedFromWindowInternal();
5434    }
5435
5436    @Override
5437    public void onScreenStateChanged(int screenState) {
5438        super.onScreenStateChanged(screenState);
5439        if (mEditor != null) mEditor.onScreenStateChanged(screenState);
5440    }
5441
5442    @Override
5443    protected boolean isPaddingOffsetRequired() {
5444        return mShadowRadius != 0 || mDrawables != null;
5445    }
5446
5447    @Override
5448    protected int getLeftPaddingOffset() {
5449        return getCompoundPaddingLeft() - mPaddingLeft +
5450                (int) Math.min(0, mShadowDx - mShadowRadius);
5451    }
5452
5453    @Override
5454    protected int getTopPaddingOffset() {
5455        return (int) Math.min(0, mShadowDy - mShadowRadius);
5456    }
5457
5458    @Override
5459    protected int getBottomPaddingOffset() {
5460        return (int) Math.max(0, mShadowDy + mShadowRadius);
5461    }
5462
5463    @Override
5464    protected int getRightPaddingOffset() {
5465        return -(getCompoundPaddingRight() - mPaddingRight) +
5466                (int) Math.max(0, mShadowDx + mShadowRadius);
5467    }
5468
5469    @Override
5470    protected boolean verifyDrawable(Drawable who) {
5471        final boolean verified = super.verifyDrawable(who);
5472        if (!verified && mDrawables != null) {
5473            for (Drawable dr : mDrawables.mShowing) {
5474                if (who == dr) {
5475                    return true;
5476                }
5477            }
5478        }
5479        return verified;
5480    }
5481
5482    @Override
5483    public void jumpDrawablesToCurrentState() {
5484        super.jumpDrawablesToCurrentState();
5485        if (mDrawables != null) {
5486            for (Drawable dr : mDrawables.mShowing) {
5487                if (dr != null) {
5488                    dr.jumpToCurrentState();
5489                }
5490            }
5491        }
5492    }
5493
5494    @Override
5495    public void invalidateDrawable(Drawable drawable) {
5496        boolean handled = false;
5497
5498        if (verifyDrawable(drawable)) {
5499            final Rect dirty = drawable.getBounds();
5500            int scrollX = mScrollX;
5501            int scrollY = mScrollY;
5502
5503            // IMPORTANT: The coordinates below are based on the coordinates computed
5504            // for each compound drawable in onDraw(). Make sure to update each section
5505            // accordingly.
5506            final TextView.Drawables drawables = mDrawables;
5507            if (drawables != null) {
5508                if (drawable == drawables.mShowing[Drawables.LEFT]) {
5509                    final int compoundPaddingTop = getCompoundPaddingTop();
5510                    final int compoundPaddingBottom = getCompoundPaddingBottom();
5511                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
5512
5513                    scrollX += mPaddingLeft;
5514                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightLeft) / 2;
5515                    handled = true;
5516                } else if (drawable == drawables.mShowing[Drawables.RIGHT]) {
5517                    final int compoundPaddingTop = getCompoundPaddingTop();
5518                    final int compoundPaddingBottom = getCompoundPaddingBottom();
5519                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
5520
5521                    scrollX += (mRight - mLeft - mPaddingRight - drawables.mDrawableSizeRight);
5522                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightRight) / 2;
5523                    handled = true;
5524                } else if (drawable == drawables.mShowing[Drawables.TOP]) {
5525                    final int compoundPaddingLeft = getCompoundPaddingLeft();
5526                    final int compoundPaddingRight = getCompoundPaddingRight();
5527                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
5528
5529                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthTop) / 2;
5530                    scrollY += mPaddingTop;
5531                    handled = true;
5532                } else if (drawable == drawables.mShowing[Drawables.BOTTOM]) {
5533                    final int compoundPaddingLeft = getCompoundPaddingLeft();
5534                    final int compoundPaddingRight = getCompoundPaddingRight();
5535                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
5536
5537                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthBottom) / 2;
5538                    scrollY += (mBottom - mTop - mPaddingBottom - drawables.mDrawableSizeBottom);
5539                    handled = true;
5540                }
5541            }
5542
5543            if (handled) {
5544                invalidate(dirty.left + scrollX, dirty.top + scrollY,
5545                        dirty.right + scrollX, dirty.bottom + scrollY);
5546            }
5547        }
5548
5549        if (!handled) {
5550            super.invalidateDrawable(drawable);
5551        }
5552    }
5553
5554    @Override
5555    public boolean hasOverlappingRendering() {
5556        // horizontal fading edge causes SaveLayerAlpha, which doesn't support alpha modulation
5557        return ((getBackground() != null && getBackground().getCurrent() != null)
5558                || mText instanceof Spannable || hasSelection()
5559                || isHorizontalFadingEdgeEnabled());
5560    }
5561
5562    /**
5563     *
5564     * Returns the state of the {@code textIsSelectable} flag (See
5565     * {@link #setTextIsSelectable setTextIsSelectable()}). Although you have to set this flag
5566     * to allow users to select and copy text in a non-editable TextView, the content of an
5567     * {@link EditText} can always be selected, independently of the value of this flag.
5568     * <p>
5569     *
5570     * @return True if the text displayed in this TextView can be selected by the user.
5571     *
5572     * @attr ref android.R.styleable#TextView_textIsSelectable
5573     */
5574    public boolean isTextSelectable() {
5575        return mEditor == null ? false : mEditor.mTextIsSelectable;
5576    }
5577
5578    /**
5579     * Sets whether the content of this view is selectable by the user. The default is
5580     * {@code false}, meaning that the content is not selectable.
5581     * <p>
5582     * When you use a TextView to display a useful piece of information to the user (such as a
5583     * contact's address), make it selectable, so that the user can select and copy its
5584     * content. You can also use set the XML attribute
5585     * {@link android.R.styleable#TextView_textIsSelectable} to "true".
5586     * <p>
5587     * When you call this method to set the value of {@code textIsSelectable}, it sets
5588     * the flags {@code focusable}, {@code focusableInTouchMode}, {@code clickable},
5589     * and {@code longClickable} to the same value. These flags correspond to the attributes
5590     * {@link android.R.styleable#View_focusable android:focusable},
5591     * {@link android.R.styleable#View_focusableInTouchMode android:focusableInTouchMode},
5592     * {@link android.R.styleable#View_clickable android:clickable}, and
5593     * {@link android.R.styleable#View_longClickable android:longClickable}. To restore any of these
5594     * flags to a state you had set previously, call one or more of the following methods:
5595     * {@link #setFocusable(boolean) setFocusable()},
5596     * {@link #setFocusableInTouchMode(boolean) setFocusableInTouchMode()},
5597     * {@link #setClickable(boolean) setClickable()} or
5598     * {@link #setLongClickable(boolean) setLongClickable()}.
5599     *
5600     * @param selectable Whether the content of this TextView should be selectable.
5601     */
5602    public void setTextIsSelectable(boolean selectable) {
5603        if (!selectable && mEditor == null) return; // false is default value with no edit data
5604
5605        createEditorIfNeeded();
5606        if (mEditor.mTextIsSelectable == selectable) return;
5607
5608        mEditor.mTextIsSelectable = selectable;
5609        setFocusableInTouchMode(selectable);
5610        setFocusable(selectable);
5611        setClickable(selectable);
5612        setLongClickable(selectable);
5613
5614        // mInputType should already be EditorInfo.TYPE_NULL and mInput should be null
5615
5616        setMovementMethod(selectable ? ArrowKeyMovementMethod.getInstance() : null);
5617        setText(mText, selectable ? BufferType.SPANNABLE : BufferType.NORMAL);
5618
5619        // Called by setText above, but safer in case of future code changes
5620        mEditor.prepareCursorControllers();
5621    }
5622
5623    @Override
5624    protected int[] onCreateDrawableState(int extraSpace) {
5625        final int[] drawableState;
5626
5627        if (mSingleLine) {
5628            drawableState = super.onCreateDrawableState(extraSpace);
5629        } else {
5630            drawableState = super.onCreateDrawableState(extraSpace + 1);
5631            mergeDrawableStates(drawableState, MULTILINE_STATE_SET);
5632        }
5633
5634        if (isTextSelectable()) {
5635            // Disable pressed state, which was introduced when TextView was made clickable.
5636            // Prevents text color change.
5637            // setClickable(false) would have a similar effect, but it also disables focus changes
5638            // and long press actions, which are both needed by text selection.
5639            final int length = drawableState.length;
5640            for (int i = 0; i < length; i++) {
5641                if (drawableState[i] == R.attr.state_pressed) {
5642                    final int[] nonPressedState = new int[length - 1];
5643                    System.arraycopy(drawableState, 0, nonPressedState, 0, i);
5644                    System.arraycopy(drawableState, i + 1, nonPressedState, i, length - i - 1);
5645                    return nonPressedState;
5646                }
5647            }
5648        }
5649
5650        return drawableState;
5651    }
5652
5653    private Path getUpdatedHighlightPath() {
5654        Path highlight = null;
5655        Paint highlightPaint = mHighlightPaint;
5656
5657        final int selStart = getSelectionStart();
5658        final int selEnd = getSelectionEnd();
5659        if (mMovement != null && (isFocused() || isPressed()) && selStart >= 0) {
5660            if (selStart == selEnd) {
5661                if (mEditor != null && mEditor.isCursorVisible() &&
5662                        (SystemClock.uptimeMillis() - mEditor.mShowCursor) %
5663                        (2 * Editor.BLINK) < Editor.BLINK) {
5664                    if (mHighlightPathBogus) {
5665                        if (mHighlightPath == null) mHighlightPath = new Path();
5666                        mHighlightPath.reset();
5667                        mLayout.getCursorPath(selStart, mHighlightPath, mText);
5668                        mEditor.updateCursorsPositions();
5669                        mHighlightPathBogus = false;
5670                    }
5671
5672                    // XXX should pass to skin instead of drawing directly
5673                    highlightPaint.setColor(mCurTextColor);
5674                    highlightPaint.setStyle(Paint.Style.STROKE);
5675                    highlight = mHighlightPath;
5676                }
5677            } else {
5678                if (mHighlightPathBogus) {
5679                    if (mHighlightPath == null) mHighlightPath = new Path();
5680                    mHighlightPath.reset();
5681                    mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
5682                    mHighlightPathBogus = false;
5683                }
5684
5685                // XXX should pass to skin instead of drawing directly
5686                highlightPaint.setColor(mHighlightColor);
5687                highlightPaint.setStyle(Paint.Style.FILL);
5688
5689                highlight = mHighlightPath;
5690            }
5691        }
5692        return highlight;
5693    }
5694
5695    /**
5696     * @hide
5697     */
5698    public int getHorizontalOffsetForDrawables() {
5699        return 0;
5700    }
5701
5702    @Override
5703    protected void onDraw(Canvas canvas) {
5704        restartMarqueeIfNeeded();
5705
5706        // Draw the background for this view
5707        super.onDraw(canvas);
5708
5709        final int compoundPaddingLeft = getCompoundPaddingLeft();
5710        final int compoundPaddingTop = getCompoundPaddingTop();
5711        final int compoundPaddingRight = getCompoundPaddingRight();
5712        final int compoundPaddingBottom = getCompoundPaddingBottom();
5713        final int scrollX = mScrollX;
5714        final int scrollY = mScrollY;
5715        final int right = mRight;
5716        final int left = mLeft;
5717        final int bottom = mBottom;
5718        final int top = mTop;
5719        final boolean isLayoutRtl = isLayoutRtl();
5720        final int offset = getHorizontalOffsetForDrawables();
5721        final int leftOffset = isLayoutRtl ? 0 : offset;
5722        final int rightOffset = isLayoutRtl ? offset : 0 ;
5723
5724        final Drawables dr = mDrawables;
5725        if (dr != null) {
5726            /*
5727             * Compound, not extended, because the icon is not clipped
5728             * if the text height is smaller.
5729             */
5730
5731            int vspace = bottom - top - compoundPaddingBottom - compoundPaddingTop;
5732            int hspace = right - left - compoundPaddingRight - compoundPaddingLeft;
5733
5734            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
5735            // Make sure to update invalidateDrawable() when changing this code.
5736            if (dr.mShowing[Drawables.LEFT] != null) {
5737                canvas.save();
5738                canvas.translate(scrollX + mPaddingLeft + leftOffset,
5739                                 scrollY + compoundPaddingTop +
5740                                 (vspace - dr.mDrawableHeightLeft) / 2);
5741                dr.mShowing[Drawables.LEFT].draw(canvas);
5742                canvas.restore();
5743            }
5744
5745            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
5746            // Make sure to update invalidateDrawable() when changing this code.
5747            if (dr.mShowing[Drawables.RIGHT] != null) {
5748                canvas.save();
5749                canvas.translate(scrollX + right - left - mPaddingRight
5750                        - dr.mDrawableSizeRight - rightOffset,
5751                         scrollY + compoundPaddingTop + (vspace - dr.mDrawableHeightRight) / 2);
5752                dr.mShowing[Drawables.RIGHT].draw(canvas);
5753                canvas.restore();
5754            }
5755
5756            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
5757            // Make sure to update invalidateDrawable() when changing this code.
5758            if (dr.mShowing[Drawables.TOP] != null) {
5759                canvas.save();
5760                canvas.translate(scrollX + compoundPaddingLeft +
5761                        (hspace - dr.mDrawableWidthTop) / 2, scrollY + mPaddingTop);
5762                dr.mShowing[Drawables.TOP].draw(canvas);
5763                canvas.restore();
5764            }
5765
5766            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
5767            // Make sure to update invalidateDrawable() when changing this code.
5768            if (dr.mShowing[Drawables.BOTTOM] != null) {
5769                canvas.save();
5770                canvas.translate(scrollX + compoundPaddingLeft +
5771                        (hspace - dr.mDrawableWidthBottom) / 2,
5772                         scrollY + bottom - top - mPaddingBottom - dr.mDrawableSizeBottom);
5773                dr.mShowing[Drawables.BOTTOM].draw(canvas);
5774                canvas.restore();
5775            }
5776        }
5777
5778        int color = mCurTextColor;
5779
5780        if (mLayout == null) {
5781            assumeLayout();
5782        }
5783
5784        Layout layout = mLayout;
5785
5786        if (mHint != null && mText.length() == 0) {
5787            if (mHintTextColor != null) {
5788                color = mCurHintTextColor;
5789            }
5790
5791            layout = mHintLayout;
5792        }
5793
5794        mTextPaint.setColor(color);
5795        mTextPaint.drawableState = getDrawableState();
5796
5797        canvas.save();
5798        /*  Would be faster if we didn't have to do this. Can we chop the
5799            (displayable) text so that we don't need to do this ever?
5800        */
5801
5802        int extendedPaddingTop = getExtendedPaddingTop();
5803        int extendedPaddingBottom = getExtendedPaddingBottom();
5804
5805        final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
5806        final int maxScrollY = mLayout.getHeight() - vspace;
5807
5808        float clipLeft = compoundPaddingLeft + scrollX;
5809        float clipTop = (scrollY == 0) ? 0 : extendedPaddingTop + scrollY;
5810        float clipRight = right - left - getCompoundPaddingRight() + scrollX;
5811        float clipBottom = bottom - top + scrollY -
5812                ((scrollY == maxScrollY) ? 0 : extendedPaddingBottom);
5813
5814        if (mShadowRadius != 0) {
5815            clipLeft += Math.min(0, mShadowDx - mShadowRadius);
5816            clipRight += Math.max(0, mShadowDx + mShadowRadius);
5817
5818            clipTop += Math.min(0, mShadowDy - mShadowRadius);
5819            clipBottom += Math.max(0, mShadowDy + mShadowRadius);
5820        }
5821
5822        canvas.clipRect(clipLeft, clipTop, clipRight, clipBottom);
5823
5824        int voffsetText = 0;
5825        int voffsetCursor = 0;
5826
5827        // translate in by our padding
5828        /* shortcircuit calling getVerticaOffset() */
5829        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5830            voffsetText = getVerticalOffset(false);
5831            voffsetCursor = getVerticalOffset(true);
5832        }
5833        canvas.translate(compoundPaddingLeft, extendedPaddingTop + voffsetText);
5834
5835        final int layoutDirection = getLayoutDirection();
5836        final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
5837        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
5838                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
5839            if (!mSingleLine && getLineCount() == 1 && canMarquee() &&
5840                    (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) != Gravity.LEFT) {
5841                final int width = mRight - mLeft;
5842                final int padding = getCompoundPaddingLeft() + getCompoundPaddingRight();
5843                final float dx = mLayout.getLineRight(0) - (width - padding);
5844                canvas.translate(layout.getParagraphDirection(0) * dx, 0.0f);
5845            }
5846
5847            if (mMarquee != null && mMarquee.isRunning()) {
5848                final float dx = -mMarquee.getScroll();
5849                canvas.translate(layout.getParagraphDirection(0) * dx, 0.0f);
5850            }
5851        }
5852
5853        final int cursorOffsetVertical = voffsetCursor - voffsetText;
5854
5855        Path highlight = getUpdatedHighlightPath();
5856        if (mEditor != null) {
5857            mEditor.onDraw(canvas, layout, highlight, mHighlightPaint, cursorOffsetVertical);
5858        } else {
5859            layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
5860        }
5861
5862        if (mMarquee != null && mMarquee.shouldDrawGhost()) {
5863            final float dx = mMarquee.getGhostOffset();
5864            canvas.translate(layout.getParagraphDirection(0) * dx, 0.0f);
5865            layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
5866        }
5867
5868        canvas.restore();
5869    }
5870
5871    @Override
5872    public void getFocusedRect(Rect r) {
5873        if (mLayout == null) {
5874            super.getFocusedRect(r);
5875            return;
5876        }
5877
5878        int selEnd = getSelectionEnd();
5879        if (selEnd < 0) {
5880            super.getFocusedRect(r);
5881            return;
5882        }
5883
5884        int selStart = getSelectionStart();
5885        if (selStart < 0 || selStart >= selEnd) {
5886            int line = mLayout.getLineForOffset(selEnd);
5887            r.top = mLayout.getLineTop(line);
5888            r.bottom = mLayout.getLineBottom(line);
5889            r.left = (int) mLayout.getPrimaryHorizontal(selEnd) - 2;
5890            r.right = r.left + 4;
5891        } else {
5892            int lineStart = mLayout.getLineForOffset(selStart);
5893            int lineEnd = mLayout.getLineForOffset(selEnd);
5894            r.top = mLayout.getLineTop(lineStart);
5895            r.bottom = mLayout.getLineBottom(lineEnd);
5896            if (lineStart == lineEnd) {
5897                r.left = (int) mLayout.getPrimaryHorizontal(selStart);
5898                r.right = (int) mLayout.getPrimaryHorizontal(selEnd);
5899            } else {
5900                // Selection extends across multiple lines -- make the focused
5901                // rect cover the entire width.
5902                if (mHighlightPathBogus) {
5903                    if (mHighlightPath == null) mHighlightPath = new Path();
5904                    mHighlightPath.reset();
5905                    mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
5906                    mHighlightPathBogus = false;
5907                }
5908                synchronized (TEMP_RECTF) {
5909                    mHighlightPath.computeBounds(TEMP_RECTF, true);
5910                    r.left = (int)TEMP_RECTF.left-1;
5911                    r.right = (int)TEMP_RECTF.right+1;
5912                }
5913            }
5914        }
5915
5916        // Adjust for padding and gravity.
5917        int paddingLeft = getCompoundPaddingLeft();
5918        int paddingTop = getExtendedPaddingTop();
5919        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5920            paddingTop += getVerticalOffset(false);
5921        }
5922        r.offset(paddingLeft, paddingTop);
5923        int paddingBottom = getExtendedPaddingBottom();
5924        r.bottom += paddingBottom;
5925    }
5926
5927    /**
5928     * Return the number of lines of text, or 0 if the internal Layout has not
5929     * been built.
5930     */
5931    public int getLineCount() {
5932        return mLayout != null ? mLayout.getLineCount() : 0;
5933    }
5934
5935    /**
5936     * Return the baseline for the specified line (0...getLineCount() - 1)
5937     * If bounds is not null, return the top, left, right, bottom extents
5938     * of the specified line in it. If the internal Layout has not been built,
5939     * return 0 and set bounds to (0, 0, 0, 0)
5940     * @param line which line to examine (0..getLineCount() - 1)
5941     * @param bounds Optional. If not null, it returns the extent of the line
5942     * @return the Y-coordinate of the baseline
5943     */
5944    public int getLineBounds(int line, Rect bounds) {
5945        if (mLayout == null) {
5946            if (bounds != null) {
5947                bounds.set(0, 0, 0, 0);
5948            }
5949            return 0;
5950        }
5951        else {
5952            int baseline = mLayout.getLineBounds(line, bounds);
5953
5954            int voffset = getExtendedPaddingTop();
5955            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5956                voffset += getVerticalOffset(true);
5957            }
5958            if (bounds != null) {
5959                bounds.offset(getCompoundPaddingLeft(), voffset);
5960            }
5961            return baseline + voffset;
5962        }
5963    }
5964
5965    @Override
5966    public int getBaseline() {
5967        if (mLayout == null) {
5968            return super.getBaseline();
5969        }
5970
5971        return getBaselineOffset() + mLayout.getLineBaseline(0);
5972    }
5973
5974    int getBaselineOffset() {
5975        int voffset = 0;
5976        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5977            voffset = getVerticalOffset(true);
5978        }
5979
5980        if (isLayoutModeOptical(mParent)) {
5981            voffset -= getOpticalInsets().top;
5982        }
5983
5984        return getExtendedPaddingTop() + voffset;
5985    }
5986
5987    /**
5988     * @hide
5989     */
5990    @Override
5991    protected int getFadeTop(boolean offsetRequired) {
5992        if (mLayout == null) return 0;
5993
5994        int voffset = 0;
5995        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5996            voffset = getVerticalOffset(true);
5997        }
5998
5999        if (offsetRequired) voffset += getTopPaddingOffset();
6000
6001        return getExtendedPaddingTop() + voffset;
6002    }
6003
6004    /**
6005     * @hide
6006     */
6007    @Override
6008    protected int getFadeHeight(boolean offsetRequired) {
6009        return mLayout != null ? mLayout.getHeight() : 0;
6010    }
6011
6012    @Override
6013    public PointerIcon getPointerIcon(MotionEvent event, float x, float y) {
6014        if (mText instanceof Spannable && mLinksClickable) {
6015            final int offset = getOffsetForPosition(x, y);
6016            final ClickableSpan[] clickables = ((Spannable) mText).getSpans(offset, offset,
6017                    ClickableSpan.class);
6018            if (clickables.length > 0) {
6019                return PointerIcon.getSystemIcon(mContext, PointerIcon.STYLE_HAND);
6020            }
6021        }
6022        if (isTextSelectable() || isTextEditable()) {
6023            return PointerIcon.getSystemIcon(mContext, PointerIcon.STYLE_TEXT);
6024        }
6025        return super.getPointerIcon(event, x, y);
6026    }
6027
6028    @Override
6029    public boolean onKeyPreIme(int keyCode, KeyEvent event) {
6030        // Note: If the IME is in fullscreen mode and IMS#mExtractEditText is in text action mode,
6031        // InputMethodService#onKeyDown and InputMethodService#onKeyUp are responsible to call
6032        // InputMethodService#mExtractEditText.maybeHandleBackInTextActionMode(event).
6033        if (keyCode == KeyEvent.KEYCODE_BACK && handleBackInTextActionModeIfNeeded(event)) {
6034            return true;
6035        }
6036        return super.onKeyPreIme(keyCode, event);
6037    }
6038
6039    /**
6040     * @hide
6041     */
6042    public boolean handleBackInTextActionModeIfNeeded(KeyEvent event) {
6043        // Do nothing unless mEditor is in text action mode.
6044        if (mEditor == null || mEditor.mTextActionMode == null) {
6045            return false;
6046        }
6047
6048        if (event.getAction() == KeyEvent.ACTION_DOWN && event.getRepeatCount() == 0) {
6049            KeyEvent.DispatcherState state = getKeyDispatcherState();
6050            if (state != null) {
6051                state.startTracking(event, this);
6052            }
6053            return true;
6054        } else if (event.getAction() == KeyEvent.ACTION_UP) {
6055            KeyEvent.DispatcherState state = getKeyDispatcherState();
6056            if (state != null) {
6057                state.handleUpEvent(event);
6058            }
6059            if (event.isTracking() && !event.isCanceled()) {
6060                stopTextActionMode();
6061                return true;
6062            }
6063        }
6064        return false;
6065    }
6066
6067    @Override
6068    public boolean onKeyDown(int keyCode, KeyEvent event) {
6069        final int which = doKeyDown(keyCode, event, null);
6070        if (which == KEY_EVENT_NOT_HANDLED) {
6071            return super.onKeyDown(keyCode, event);
6072        }
6073
6074        return true;
6075    }
6076
6077    @Override
6078    public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) {
6079        KeyEvent down = KeyEvent.changeAction(event, KeyEvent.ACTION_DOWN);
6080        final int which = doKeyDown(keyCode, down, event);
6081        if (which == KEY_EVENT_NOT_HANDLED) {
6082            // Go through default dispatching.
6083            return super.onKeyMultiple(keyCode, repeatCount, event);
6084        }
6085        if (which == KEY_EVENT_HANDLED) {
6086            // Consumed the whole thing.
6087            return true;
6088        }
6089
6090        repeatCount--;
6091
6092        // We are going to dispatch the remaining events to either the input
6093        // or movement method.  To do this, we will just send a repeated stream
6094        // of down and up events until we have done the complete repeatCount.
6095        // It would be nice if those interfaces had an onKeyMultiple() method,
6096        // but adding that is a more complicated change.
6097        KeyEvent up = KeyEvent.changeAction(event, KeyEvent.ACTION_UP);
6098        if (which == KEY_DOWN_HANDLED_BY_KEY_LISTENER) {
6099            // mEditor and mEditor.mInput are not null from doKeyDown
6100            mEditor.mKeyListener.onKeyUp(this, (Editable)mText, keyCode, up);
6101            while (--repeatCount > 0) {
6102                mEditor.mKeyListener.onKeyDown(this, (Editable)mText, keyCode, down);
6103                mEditor.mKeyListener.onKeyUp(this, (Editable)mText, keyCode, up);
6104            }
6105            hideErrorIfUnchanged();
6106
6107        } else if (which == KEY_DOWN_HANDLED_BY_MOVEMENT_METHOD) {
6108            // mMovement is not null from doKeyDown
6109            mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
6110            while (--repeatCount > 0) {
6111                mMovement.onKeyDown(this, (Spannable)mText, keyCode, down);
6112                mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
6113            }
6114        }
6115
6116        return true;
6117    }
6118
6119    /**
6120     * Returns true if pressing ENTER in this field advances focus instead
6121     * of inserting the character.  This is true mostly in single-line fields,
6122     * but also in mail addresses and subjects which will display on multiple
6123     * lines but where it doesn't make sense to insert newlines.
6124     */
6125    private boolean shouldAdvanceFocusOnEnter() {
6126        if (getKeyListener() == null) {
6127            return false;
6128        }
6129
6130        if (mSingleLine) {
6131            return true;
6132        }
6133
6134        if (mEditor != null &&
6135                (mEditor.mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
6136            int variation = mEditor.mInputType & EditorInfo.TYPE_MASK_VARIATION;
6137            if (variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_ADDRESS
6138                    || variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT) {
6139                return true;
6140            }
6141        }
6142
6143        return false;
6144    }
6145
6146    /**
6147     * Returns true if pressing TAB in this field advances focus instead
6148     * of inserting the character.  Insert tabs only in multi-line editors.
6149     */
6150    private boolean shouldAdvanceFocusOnTab() {
6151        if (getKeyListener() != null && !mSingleLine && mEditor != null &&
6152                (mEditor.mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
6153            int variation = mEditor.mInputType & EditorInfo.TYPE_MASK_VARIATION;
6154            if (variation == EditorInfo.TYPE_TEXT_FLAG_IME_MULTI_LINE
6155                    || variation == EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE) {
6156                return false;
6157            }
6158        }
6159        return true;
6160    }
6161
6162    private int doKeyDown(int keyCode, KeyEvent event, KeyEvent otherEvent) {
6163        if (!isEnabled()) {
6164            return KEY_EVENT_NOT_HANDLED;
6165        }
6166
6167        // If this is the initial keydown, we don't want to prevent a movement away from this view.
6168        // While this shouldn't be necessary because any time we're preventing default movement we
6169        // should be restricting the focus to remain within this view, thus we'll also receive
6170        // the key up event, occasionally key up events will get dropped and we don't want to
6171        // prevent the user from traversing out of this on the next key down.
6172        if (event.getRepeatCount() == 0 && !KeyEvent.isModifierKey(keyCode)) {
6173            mPreventDefaultMovement = false;
6174        }
6175
6176        switch (keyCode) {
6177            case KeyEvent.KEYCODE_ENTER:
6178                if (event.hasNoModifiers()) {
6179                    // When mInputContentType is set, we know that we are
6180                    // running in a "modern" cupcake environment, so don't need
6181                    // to worry about the application trying to capture
6182                    // enter key events.
6183                    if (mEditor != null && mEditor.mInputContentType != null) {
6184                        // If there is an action listener, given them a
6185                        // chance to consume the event.
6186                        if (mEditor.mInputContentType.onEditorActionListener != null &&
6187                                mEditor.mInputContentType.onEditorActionListener.onEditorAction(
6188                                this, EditorInfo.IME_NULL, event)) {
6189                            mEditor.mInputContentType.enterDown = true;
6190                            // We are consuming the enter key for them.
6191                            return KEY_EVENT_HANDLED;
6192                        }
6193                    }
6194
6195                    // If our editor should move focus when enter is pressed, or
6196                    // this is a generated event from an IME action button, then
6197                    // don't let it be inserted into the text.
6198                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
6199                            || shouldAdvanceFocusOnEnter()) {
6200                        if (hasOnClickListeners()) {
6201                            return KEY_EVENT_NOT_HANDLED;
6202                        }
6203                        return KEY_EVENT_HANDLED;
6204                    }
6205                }
6206                break;
6207
6208            case KeyEvent.KEYCODE_DPAD_CENTER:
6209                if (event.hasNoModifiers()) {
6210                    if (shouldAdvanceFocusOnEnter()) {
6211                        return KEY_EVENT_NOT_HANDLED;
6212                    }
6213                }
6214                break;
6215
6216            case KeyEvent.KEYCODE_TAB:
6217                if (event.hasNoModifiers() || event.hasModifiers(KeyEvent.META_SHIFT_ON)) {
6218                    if (shouldAdvanceFocusOnTab()) {
6219                        return KEY_EVENT_NOT_HANDLED;
6220                    }
6221                }
6222                break;
6223
6224                // Has to be done on key down (and not on key up) to correctly be intercepted.
6225            case KeyEvent.KEYCODE_BACK:
6226                if (mEditor != null && mEditor.mTextActionMode != null) {
6227                    stopTextActionMode();
6228                    return KEY_EVENT_HANDLED;
6229                }
6230                break;
6231
6232            case KeyEvent.KEYCODE_CUT:
6233                if (event.hasNoModifiers() && canCut()) {
6234                    if (onTextContextMenuItem(ID_CUT)) {
6235                        return KEY_EVENT_HANDLED;
6236                    }
6237                }
6238                break;
6239
6240            case KeyEvent.KEYCODE_COPY:
6241                if (event.hasNoModifiers() && canCopy()) {
6242                    if (onTextContextMenuItem(ID_COPY)) {
6243                        return KEY_EVENT_HANDLED;
6244                    }
6245                }
6246                break;
6247
6248            case KeyEvent.KEYCODE_PASTE:
6249                if (event.hasNoModifiers() && canPaste()) {
6250                    if (onTextContextMenuItem(ID_PASTE)) {
6251                        return KEY_EVENT_HANDLED;
6252                    }
6253                }
6254                break;
6255        }
6256
6257        if (mEditor != null && mEditor.mKeyListener != null) {
6258            boolean doDown = true;
6259            if (otherEvent != null) {
6260                try {
6261                    beginBatchEdit();
6262                    final boolean handled = mEditor.mKeyListener.onKeyOther(this, (Editable) mText,
6263                            otherEvent);
6264                    hideErrorIfUnchanged();
6265                    doDown = false;
6266                    if (handled) {
6267                        return KEY_EVENT_HANDLED;
6268                    }
6269                } catch (AbstractMethodError e) {
6270                    // onKeyOther was added after 1.0, so if it isn't
6271                    // implemented we need to try to dispatch as a regular down.
6272                } finally {
6273                    endBatchEdit();
6274                }
6275            }
6276
6277            if (doDown) {
6278                beginBatchEdit();
6279                final boolean handled = mEditor.mKeyListener.onKeyDown(this, (Editable) mText,
6280                        keyCode, event);
6281                endBatchEdit();
6282                hideErrorIfUnchanged();
6283                if (handled) return KEY_DOWN_HANDLED_BY_KEY_LISTENER;
6284            }
6285        }
6286
6287        // bug 650865: sometimes we get a key event before a layout.
6288        // don't try to move around if we don't know the layout.
6289
6290        if (mMovement != null && mLayout != null) {
6291            boolean doDown = true;
6292            if (otherEvent != null) {
6293                try {
6294                    boolean handled = mMovement.onKeyOther(this, (Spannable) mText,
6295                            otherEvent);
6296                    doDown = false;
6297                    if (handled) {
6298                        return KEY_EVENT_HANDLED;
6299                    }
6300                } catch (AbstractMethodError e) {
6301                    // onKeyOther was added after 1.0, so if it isn't
6302                    // implemented we need to try to dispatch as a regular down.
6303                }
6304            }
6305            if (doDown) {
6306                if (mMovement.onKeyDown(this, (Spannable)mText, keyCode, event)) {
6307                    if (event.getRepeatCount() == 0 && !KeyEvent.isModifierKey(keyCode)) {
6308                        mPreventDefaultMovement = true;
6309                    }
6310                    return KEY_DOWN_HANDLED_BY_MOVEMENT_METHOD;
6311                }
6312            }
6313        }
6314
6315        return mPreventDefaultMovement && !KeyEvent.isModifierKey(keyCode) ?
6316                KEY_EVENT_HANDLED : KEY_EVENT_NOT_HANDLED;
6317    }
6318
6319    /**
6320     * Resets the mErrorWasChanged flag, so that future calls to {@link #setError(CharSequence)}
6321     * can be recorded.
6322     * @hide
6323     */
6324    public void resetErrorChangedFlag() {
6325        /*
6326         * Keep track of what the error was before doing the input
6327         * so that if an input filter changed the error, we leave
6328         * that error showing.  Otherwise, we take down whatever
6329         * error was showing when the user types something.
6330         */
6331        if (mEditor != null) mEditor.mErrorWasChanged = false;
6332    }
6333
6334    /**
6335     * @hide
6336     */
6337    public void hideErrorIfUnchanged() {
6338        if (mEditor != null && mEditor.mError != null && !mEditor.mErrorWasChanged) {
6339            setError(null, null);
6340        }
6341    }
6342
6343    @Override
6344    public boolean onKeyUp(int keyCode, KeyEvent event) {
6345        if (!isEnabled()) {
6346            return super.onKeyUp(keyCode, event);
6347        }
6348
6349        if (!KeyEvent.isModifierKey(keyCode)) {
6350            mPreventDefaultMovement = false;
6351        }
6352
6353        switch (keyCode) {
6354            case KeyEvent.KEYCODE_DPAD_CENTER:
6355                if (event.hasNoModifiers()) {
6356                    /*
6357                     * If there is a click listener, just call through to
6358                     * super, which will invoke it.
6359                     *
6360                     * If there isn't a click listener, try to show the soft
6361                     * input method.  (It will also
6362                     * call performClick(), but that won't do anything in
6363                     * this case.)
6364                     */
6365                    if (!hasOnClickListeners()) {
6366                        if (mMovement != null && mText instanceof Editable
6367                                && mLayout != null && onCheckIsTextEditor()) {
6368                            InputMethodManager imm = InputMethodManager.peekInstance();
6369                            viewClicked(imm);
6370                            if (imm != null && getShowSoftInputOnFocus()) {
6371                                imm.showSoftInput(this, 0);
6372                            }
6373                        }
6374                    }
6375                }
6376                return super.onKeyUp(keyCode, event);
6377
6378            case KeyEvent.KEYCODE_ENTER:
6379                if (event.hasNoModifiers()) {
6380                    if (mEditor != null && mEditor.mInputContentType != null
6381                            && mEditor.mInputContentType.onEditorActionListener != null
6382                            && mEditor.mInputContentType.enterDown) {
6383                        mEditor.mInputContentType.enterDown = false;
6384                        if (mEditor.mInputContentType.onEditorActionListener.onEditorAction(
6385                                this, EditorInfo.IME_NULL, event)) {
6386                            return true;
6387                        }
6388                    }
6389
6390                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
6391                            || shouldAdvanceFocusOnEnter()) {
6392                        /*
6393                         * If there is a click listener, just call through to
6394                         * super, which will invoke it.
6395                         *
6396                         * If there isn't a click listener, try to advance focus,
6397                         * but still call through to super, which will reset the
6398                         * pressed state and longpress state.  (It will also
6399                         * call performClick(), but that won't do anything in
6400                         * this case.)
6401                         */
6402                        if (!hasOnClickListeners()) {
6403                            View v = focusSearch(FOCUS_DOWN);
6404
6405                            if (v != null) {
6406                                if (!v.requestFocus(FOCUS_DOWN)) {
6407                                    throw new IllegalStateException(
6408                                            "focus search returned a view " +
6409                                            "that wasn't able to take focus!");
6410                                }
6411
6412                                /*
6413                                 * Return true because we handled the key; super
6414                                 * will return false because there was no click
6415                                 * listener.
6416                                 */
6417                                super.onKeyUp(keyCode, event);
6418                                return true;
6419                            } else if ((event.getFlags()
6420                                    & KeyEvent.FLAG_EDITOR_ACTION) != 0) {
6421                                // No target for next focus, but make sure the IME
6422                                // if this came from it.
6423                                InputMethodManager imm = InputMethodManager.peekInstance();
6424                                if (imm != null && imm.isActive(this)) {
6425                                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
6426                                }
6427                            }
6428                        }
6429                    }
6430                    return super.onKeyUp(keyCode, event);
6431                }
6432                break;
6433        }
6434
6435        if (mEditor != null && mEditor.mKeyListener != null)
6436            if (mEditor.mKeyListener.onKeyUp(this, (Editable) mText, keyCode, event))
6437                return true;
6438
6439        if (mMovement != null && mLayout != null)
6440            if (mMovement.onKeyUp(this, (Spannable) mText, keyCode, event))
6441                return true;
6442
6443        return super.onKeyUp(keyCode, event);
6444    }
6445
6446    @Override
6447    public boolean onCheckIsTextEditor() {
6448        return mEditor != null && mEditor.mInputType != EditorInfo.TYPE_NULL;
6449    }
6450
6451    @Override
6452    public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
6453        if (onCheckIsTextEditor() && isEnabled()) {
6454            mEditor.createInputMethodStateIfNeeded();
6455            outAttrs.inputType = getInputType();
6456            if (mEditor.mInputContentType != null) {
6457                outAttrs.imeOptions = mEditor.mInputContentType.imeOptions;
6458                outAttrs.privateImeOptions = mEditor.mInputContentType.privateImeOptions;
6459                outAttrs.actionLabel = mEditor.mInputContentType.imeActionLabel;
6460                outAttrs.actionId = mEditor.mInputContentType.imeActionId;
6461                outAttrs.extras = mEditor.mInputContentType.extras;
6462                outAttrs.hintLocales = mEditor.mInputContentType.imeHintLocales;
6463            } else {
6464                outAttrs.imeOptions = EditorInfo.IME_NULL;
6465                outAttrs.hintLocales = null;
6466            }
6467            if (focusSearch(FOCUS_DOWN) != null) {
6468                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_NEXT;
6469            }
6470            if (focusSearch(FOCUS_UP) != null) {
6471                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_PREVIOUS;
6472            }
6473            if ((outAttrs.imeOptions&EditorInfo.IME_MASK_ACTION)
6474                    == EditorInfo.IME_ACTION_UNSPECIFIED) {
6475                if ((outAttrs.imeOptions&EditorInfo.IME_FLAG_NAVIGATE_NEXT) != 0) {
6476                    // An action has not been set, but the enter key will move to
6477                    // the next focus, so set the action to that.
6478                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_NEXT;
6479                } else {
6480                    // An action has not been set, and there is no focus to move
6481                    // to, so let's just supply a "done" action.
6482                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_DONE;
6483                }
6484                if (!shouldAdvanceFocusOnEnter()) {
6485                    outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
6486                }
6487            }
6488            if (isMultilineInputType(outAttrs.inputType)) {
6489                // Multi-line text editors should always show an enter key.
6490                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
6491            }
6492            outAttrs.hintText = mHint;
6493            if (mText instanceof Editable) {
6494                InputConnection ic = new EditableInputConnection(this);
6495                outAttrs.initialSelStart = getSelectionStart();
6496                outAttrs.initialSelEnd = getSelectionEnd();
6497                outAttrs.initialCapsMode = ic.getCursorCapsMode(getInputType());
6498                return ic;
6499            }
6500        }
6501        return null;
6502    }
6503
6504    /**
6505     * If this TextView contains editable content, extract a portion of it
6506     * based on the information in <var>request</var> in to <var>outText</var>.
6507     * @return Returns true if the text was successfully extracted, else false.
6508     */
6509    public boolean extractText(ExtractedTextRequest request, ExtractedText outText) {
6510        createEditorIfNeeded();
6511        return mEditor.extractText(request, outText);
6512    }
6513
6514    /**
6515     * This is used to remove all style-impacting spans from text before new
6516     * extracted text is being replaced into it, so that we don't have any
6517     * lingering spans applied during the replace.
6518     */
6519    static void removeParcelableSpans(Spannable spannable, int start, int end) {
6520        Object[] spans = spannable.getSpans(start, end, ParcelableSpan.class);
6521        int i = spans.length;
6522        while (i > 0) {
6523            i--;
6524            spannable.removeSpan(spans[i]);
6525        }
6526    }
6527
6528    /**
6529     * Apply to this text view the given extracted text, as previously
6530     * returned by {@link #extractText(ExtractedTextRequest, ExtractedText)}.
6531     */
6532    public void setExtractedText(ExtractedText text) {
6533        Editable content = getEditableText();
6534        if (text.text != null) {
6535            if (content == null) {
6536                setText(text.text, TextView.BufferType.EDITABLE);
6537            } else {
6538                int start = 0;
6539                int end = content.length();
6540
6541                if (text.partialStartOffset >= 0) {
6542                    final int N = content.length();
6543                    start = text.partialStartOffset;
6544                    if (start > N) start = N;
6545                    end = text.partialEndOffset;
6546                    if (end > N) end = N;
6547                }
6548
6549                removeParcelableSpans(content, start, end);
6550                if (TextUtils.equals(content.subSequence(start, end), text.text)) {
6551                    if (text.text instanceof Spanned) {
6552                        // OK to copy spans only.
6553                        TextUtils.copySpansFrom((Spanned) text.text, start, end,
6554                                Object.class, content, start);
6555                    }
6556                } else {
6557                    content.replace(start, end, text.text);
6558                }
6559            }
6560        }
6561
6562        // Now set the selection position...  make sure it is in range, to
6563        // avoid crashes.  If this is a partial update, it is possible that
6564        // the underlying text may have changed, causing us problems here.
6565        // Also we just don't want to trust clients to do the right thing.
6566        Spannable sp = (Spannable)getText();
6567        final int N = sp.length();
6568        int start = text.selectionStart;
6569        if (start < 0) start = 0;
6570        else if (start > N) start = N;
6571        int end = text.selectionEnd;
6572        if (end < 0) end = 0;
6573        else if (end > N) end = N;
6574        Selection.setSelection(sp, start, end);
6575
6576        // Finally, update the selection mode.
6577        if ((text.flags&ExtractedText.FLAG_SELECTING) != 0) {
6578            MetaKeyKeyListener.startSelecting(this, sp);
6579        } else {
6580            MetaKeyKeyListener.stopSelecting(this, sp);
6581        }
6582    }
6583
6584    /**
6585     * @hide
6586     */
6587    public void setExtracting(ExtractedTextRequest req) {
6588        if (mEditor.mInputMethodState != null) {
6589            mEditor.mInputMethodState.mExtractedTextRequest = req;
6590        }
6591        // This would stop a possible selection mode, but no such mode is started in case
6592        // extracted mode will start. Some text is selected though, and will trigger an action mode
6593        // in the extracted view.
6594        mEditor.hideCursorAndSpanControllers();
6595        stopTextActionMode();
6596    }
6597
6598    /**
6599     * Called by the framework in response to a text completion from
6600     * the current input method, provided by it calling
6601     * {@link InputConnection#commitCompletion
6602     * InputConnection.commitCompletion()}.  The default implementation does
6603     * nothing; text views that are supporting auto-completion should override
6604     * this to do their desired behavior.
6605     *
6606     * @param text The auto complete text the user has selected.
6607     */
6608    public void onCommitCompletion(CompletionInfo text) {
6609        // intentionally empty
6610    }
6611
6612    /**
6613     * Called by the framework in response to a text auto-correction (such as fixing a typo using a
6614     * a dictionnary) from the current input method, provided by it calling
6615     * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default
6616     * implementation flashes the background of the corrected word to provide feedback to the user.
6617     *
6618     * @param info The auto correct info about the text that was corrected.
6619     */
6620    public void onCommitCorrection(CorrectionInfo info) {
6621        if (mEditor != null) mEditor.onCommitCorrection(info);
6622    }
6623
6624    public void beginBatchEdit() {
6625        if (mEditor != null) mEditor.beginBatchEdit();
6626    }
6627
6628    public void endBatchEdit() {
6629        if (mEditor != null) mEditor.endBatchEdit();
6630    }
6631
6632    /**
6633     * Called by the framework in response to a request to begin a batch
6634     * of edit operations through a call to link {@link #beginBatchEdit()}.
6635     */
6636    public void onBeginBatchEdit() {
6637        // intentionally empty
6638    }
6639
6640    /**
6641     * Called by the framework in response to a request to end a batch
6642     * of edit operations through a call to link {@link #endBatchEdit}.
6643     */
6644    public void onEndBatchEdit() {
6645        // intentionally empty
6646    }
6647
6648    /**
6649     * Called by the framework in response to a private command from the
6650     * current method, provided by it calling
6651     * {@link InputConnection#performPrivateCommand
6652     * InputConnection.performPrivateCommand()}.
6653     *
6654     * @param action The action name of the command.
6655     * @param data Any additional data for the command.  This may be null.
6656     * @return Return true if you handled the command, else false.
6657     */
6658    public boolean onPrivateIMECommand(String action, Bundle data) {
6659        return false;
6660    }
6661
6662    private void nullLayouts() {
6663        if (mLayout instanceof BoringLayout && mSavedLayout == null) {
6664            mSavedLayout = (BoringLayout) mLayout;
6665        }
6666        if (mHintLayout instanceof BoringLayout && mSavedHintLayout == null) {
6667            mSavedHintLayout = (BoringLayout) mHintLayout;
6668        }
6669
6670        mSavedMarqueeModeLayout = mLayout = mHintLayout = null;
6671
6672        mBoring = mHintBoring = null;
6673
6674        // Since it depends on the value of mLayout
6675        if (mEditor != null) mEditor.prepareCursorControllers();
6676    }
6677
6678    /**
6679     * Make a new Layout based on the already-measured size of the view,
6680     * on the assumption that it was measured correctly at some point.
6681     */
6682    private void assumeLayout() {
6683        int width = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6684
6685        if (width < 1) {
6686            width = 0;
6687        }
6688
6689        int physicalWidth = width;
6690
6691        if (mHorizontallyScrolling) {
6692            width = VERY_WIDE;
6693        }
6694
6695        makeNewLayout(width, physicalWidth, UNKNOWN_BORING, UNKNOWN_BORING,
6696                      physicalWidth, false);
6697    }
6698
6699    private Layout.Alignment getLayoutAlignment() {
6700        Layout.Alignment alignment;
6701        switch (getTextAlignment()) {
6702            case TEXT_ALIGNMENT_GRAVITY:
6703                switch (mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) {
6704                    case Gravity.START:
6705                        alignment = Layout.Alignment.ALIGN_NORMAL;
6706                        break;
6707                    case Gravity.END:
6708                        alignment = Layout.Alignment.ALIGN_OPPOSITE;
6709                        break;
6710                    case Gravity.LEFT:
6711                        alignment = Layout.Alignment.ALIGN_LEFT;
6712                        break;
6713                    case Gravity.RIGHT:
6714                        alignment = Layout.Alignment.ALIGN_RIGHT;
6715                        break;
6716                    case Gravity.CENTER_HORIZONTAL:
6717                        alignment = Layout.Alignment.ALIGN_CENTER;
6718                        break;
6719                    default:
6720                        alignment = Layout.Alignment.ALIGN_NORMAL;
6721                        break;
6722                }
6723                break;
6724            case TEXT_ALIGNMENT_TEXT_START:
6725                alignment = Layout.Alignment.ALIGN_NORMAL;
6726                break;
6727            case TEXT_ALIGNMENT_TEXT_END:
6728                alignment = Layout.Alignment.ALIGN_OPPOSITE;
6729                break;
6730            case TEXT_ALIGNMENT_CENTER:
6731                alignment = Layout.Alignment.ALIGN_CENTER;
6732                break;
6733            case TEXT_ALIGNMENT_VIEW_START:
6734                alignment = (getLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
6735                        Layout.Alignment.ALIGN_RIGHT : Layout.Alignment.ALIGN_LEFT;
6736                break;
6737            case TEXT_ALIGNMENT_VIEW_END:
6738                alignment = (getLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
6739                        Layout.Alignment.ALIGN_LEFT : Layout.Alignment.ALIGN_RIGHT;
6740                break;
6741            case TEXT_ALIGNMENT_INHERIT:
6742                // This should never happen as we have already resolved the text alignment
6743                // but better safe than sorry so we just fall through
6744            default:
6745                alignment = Layout.Alignment.ALIGN_NORMAL;
6746                break;
6747        }
6748        return alignment;
6749    }
6750
6751    /**
6752     * The width passed in is now the desired layout width,
6753     * not the full view width with padding.
6754     * {@hide}
6755     */
6756    protected void makeNewLayout(int wantWidth, int hintWidth,
6757                                 BoringLayout.Metrics boring,
6758                                 BoringLayout.Metrics hintBoring,
6759                                 int ellipsisWidth, boolean bringIntoView) {
6760        stopMarquee();
6761
6762        // Update "old" cached values
6763        mOldMaximum = mMaximum;
6764        mOldMaxMode = mMaxMode;
6765
6766        mHighlightPathBogus = true;
6767
6768        if (wantWidth < 0) {
6769            wantWidth = 0;
6770        }
6771        if (hintWidth < 0) {
6772            hintWidth = 0;
6773        }
6774
6775        Layout.Alignment alignment = getLayoutAlignment();
6776        final boolean testDirChange = mSingleLine && mLayout != null &&
6777            (alignment == Layout.Alignment.ALIGN_NORMAL ||
6778             alignment == Layout.Alignment.ALIGN_OPPOSITE);
6779        int oldDir = 0;
6780        if (testDirChange) oldDir = mLayout.getParagraphDirection(0);
6781        boolean shouldEllipsize = mEllipsize != null && getKeyListener() == null;
6782        final boolean switchEllipsize = mEllipsize == TruncateAt.MARQUEE &&
6783                mMarqueeFadeMode != MARQUEE_FADE_NORMAL;
6784        TruncateAt effectiveEllipsize = mEllipsize;
6785        if (mEllipsize == TruncateAt.MARQUEE &&
6786                mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
6787            effectiveEllipsize = TruncateAt.END_SMALL;
6788        }
6789
6790        if (mTextDir == null) {
6791            mTextDir = getTextDirectionHeuristic();
6792        }
6793
6794        mLayout = makeSingleLayout(wantWidth, boring, ellipsisWidth, alignment, shouldEllipsize,
6795                effectiveEllipsize, effectiveEllipsize == mEllipsize);
6796        if (switchEllipsize) {
6797            TruncateAt oppositeEllipsize = effectiveEllipsize == TruncateAt.MARQUEE ?
6798                    TruncateAt.END : TruncateAt.MARQUEE;
6799            mSavedMarqueeModeLayout = makeSingleLayout(wantWidth, boring, ellipsisWidth, alignment,
6800                    shouldEllipsize, oppositeEllipsize, effectiveEllipsize != mEllipsize);
6801        }
6802
6803        shouldEllipsize = mEllipsize != null;
6804        mHintLayout = null;
6805
6806        if (mHint != null) {
6807            if (shouldEllipsize) hintWidth = wantWidth;
6808
6809            if (hintBoring == UNKNOWN_BORING) {
6810                hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mTextDir,
6811                                                   mHintBoring);
6812                if (hintBoring != null) {
6813                    mHintBoring = hintBoring;
6814                }
6815            }
6816
6817            if (hintBoring != null) {
6818                if (hintBoring.width <= hintWidth &&
6819                    (!shouldEllipsize || hintBoring.width <= ellipsisWidth)) {
6820                    if (mSavedHintLayout != null) {
6821                        mHintLayout = mSavedHintLayout.
6822                                replaceOrMake(mHint, mTextPaint,
6823                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6824                                hintBoring, mIncludePad);
6825                    } else {
6826                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6827                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6828                                hintBoring, mIncludePad);
6829                    }
6830
6831                    mSavedHintLayout = (BoringLayout) mHintLayout;
6832                } else if (shouldEllipsize && hintBoring.width <= hintWidth) {
6833                    if (mSavedHintLayout != null) {
6834                        mHintLayout = mSavedHintLayout.
6835                                replaceOrMake(mHint, mTextPaint,
6836                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6837                                hintBoring, mIncludePad, mEllipsize,
6838                                ellipsisWidth);
6839                    } else {
6840                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6841                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6842                                hintBoring, mIncludePad, mEllipsize,
6843                                ellipsisWidth);
6844                    }
6845                }
6846            }
6847            // TODO: code duplication with makeSingleLayout()
6848            if (mHintLayout == null) {
6849                StaticLayout.Builder builder = StaticLayout.Builder.obtain(mHint, 0,
6850                        mHint.length(), mTextPaint, hintWidth)
6851                        .setAlignment(alignment)
6852                        .setTextDirection(mTextDir)
6853                        .setLineSpacing(mSpacingAdd, mSpacingMult)
6854                        .setIncludePad(mIncludePad)
6855                        .setBreakStrategy(mBreakStrategy)
6856                        .setHyphenationFrequency(mHyphenationFrequency)
6857                        .setMaxLines(mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6858                if (shouldEllipsize) {
6859                    builder.setEllipsize(mEllipsize)
6860                            .setEllipsizedWidth(ellipsisWidth);
6861                }
6862                mHintLayout = builder.build();
6863            }
6864        }
6865
6866        if (bringIntoView || (testDirChange && oldDir != mLayout.getParagraphDirection(0))) {
6867            registerForPreDraw();
6868        }
6869
6870        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6871            if (!compressText(ellipsisWidth)) {
6872                final int height = mLayoutParams.height;
6873                // If the size of the view does not depend on the size of the text, try to
6874                // start the marquee immediately
6875                if (height != LayoutParams.WRAP_CONTENT && height != LayoutParams.MATCH_PARENT) {
6876                    startMarquee();
6877                } else {
6878                    // Defer the start of the marquee until we know our width (see setFrame())
6879                    mRestartMarquee = true;
6880                }
6881            }
6882        }
6883
6884        // CursorControllers need a non-null mLayout
6885        if (mEditor != null) mEditor.prepareCursorControllers();
6886    }
6887
6888    /**
6889     * @hide
6890     */
6891    protected Layout makeSingleLayout(int wantWidth, BoringLayout.Metrics boring, int ellipsisWidth,
6892            Layout.Alignment alignment, boolean shouldEllipsize, TruncateAt effectiveEllipsize,
6893            boolean useSaved) {
6894        Layout result = null;
6895        if (mText instanceof Spannable) {
6896            result = new DynamicLayout(mText, mTransformed, mTextPaint, wantWidth,
6897                    alignment, mTextDir, mSpacingMult, mSpacingAdd, mIncludePad,
6898                    mBreakStrategy, mHyphenationFrequency,
6899                    getKeyListener() == null ? effectiveEllipsize : null, ellipsisWidth);
6900        } else {
6901            if (boring == UNKNOWN_BORING) {
6902                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
6903                if (boring != null) {
6904                    mBoring = boring;
6905                }
6906            }
6907
6908            if (boring != null) {
6909                if (boring.width <= wantWidth &&
6910                        (effectiveEllipsize == null || boring.width <= ellipsisWidth)) {
6911                    if (useSaved && mSavedLayout != null) {
6912                        result = mSavedLayout.replaceOrMake(mTransformed, mTextPaint,
6913                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6914                                boring, mIncludePad);
6915                    } else {
6916                        result = BoringLayout.make(mTransformed, mTextPaint,
6917                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6918                                boring, mIncludePad);
6919                    }
6920
6921                    if (useSaved) {
6922                        mSavedLayout = (BoringLayout) result;
6923                    }
6924                } else if (shouldEllipsize && boring.width <= wantWidth) {
6925                    if (useSaved && mSavedLayout != null) {
6926                        result = mSavedLayout.replaceOrMake(mTransformed, mTextPaint,
6927                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6928                                boring, mIncludePad, effectiveEllipsize,
6929                                ellipsisWidth);
6930                    } else {
6931                        result = BoringLayout.make(mTransformed, mTextPaint,
6932                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6933                                boring, mIncludePad, effectiveEllipsize,
6934                                ellipsisWidth);
6935                    }
6936                }
6937            }
6938        }
6939        if (result == null) {
6940            StaticLayout.Builder builder = StaticLayout.Builder.obtain(mTransformed,
6941                    0, mTransformed.length(), mTextPaint, wantWidth)
6942                    .setAlignment(alignment)
6943                    .setTextDirection(mTextDir)
6944                    .setLineSpacing(mSpacingAdd, mSpacingMult)
6945                    .setIncludePad(mIncludePad)
6946                    .setBreakStrategy(mBreakStrategy)
6947                    .setHyphenationFrequency(mHyphenationFrequency)
6948                    .setMaxLines(mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6949            if (shouldEllipsize) {
6950                builder.setEllipsize(effectiveEllipsize)
6951                        .setEllipsizedWidth(ellipsisWidth);
6952
6953            }
6954            // TODO: explore always setting maxLines
6955            result = builder.build();
6956        }
6957        return result;
6958    }
6959
6960    private boolean compressText(float width) {
6961        if (isHardwareAccelerated()) return false;
6962
6963        // Only compress the text if it hasn't been compressed by the previous pass
6964        if (width > 0.0f && mLayout != null && getLineCount() == 1 && !mUserSetTextScaleX &&
6965                mTextPaint.getTextScaleX() == 1.0f) {
6966            final float textWidth = mLayout.getLineWidth(0);
6967            final float overflow = (textWidth + 1.0f - width) / width;
6968            if (overflow > 0.0f && overflow <= Marquee.MARQUEE_DELTA_MAX) {
6969                mTextPaint.setTextScaleX(1.0f - overflow - 0.005f);
6970                post(new Runnable() {
6971                    public void run() {
6972                        requestLayout();
6973                    }
6974                });
6975                return true;
6976            }
6977        }
6978
6979        return false;
6980    }
6981
6982    private static int desired(Layout layout) {
6983        int n = layout.getLineCount();
6984        CharSequence text = layout.getText();
6985        float max = 0;
6986
6987        // if any line was wrapped, we can't use it.
6988        // but it's ok for the last line not to have a newline
6989
6990        for (int i = 0; i < n - 1; i++) {
6991            if (text.charAt(layout.getLineEnd(i) - 1) != '\n')
6992                return -1;
6993        }
6994
6995        for (int i = 0; i < n; i++) {
6996            max = Math.max(max, layout.getLineWidth(i));
6997        }
6998
6999        return (int) Math.ceil(max);
7000    }
7001
7002    /**
7003     * Set whether the TextView includes extra top and bottom padding to make
7004     * room for accents that go above the normal ascent and descent.
7005     * The default is true.
7006     *
7007     * @see #getIncludeFontPadding()
7008     *
7009     * @attr ref android.R.styleable#TextView_includeFontPadding
7010     */
7011    public void setIncludeFontPadding(boolean includepad) {
7012        if (mIncludePad != includepad) {
7013            mIncludePad = includepad;
7014
7015            if (mLayout != null) {
7016                nullLayouts();
7017                requestLayout();
7018                invalidate();
7019            }
7020        }
7021    }
7022
7023    /**
7024     * Gets whether the TextView includes extra top and bottom padding to make
7025     * room for accents that go above the normal ascent and descent.
7026     *
7027     * @see #setIncludeFontPadding(boolean)
7028     *
7029     * @attr ref android.R.styleable#TextView_includeFontPadding
7030     */
7031    public boolean getIncludeFontPadding() {
7032        return mIncludePad;
7033    }
7034
7035    private static final BoringLayout.Metrics UNKNOWN_BORING = new BoringLayout.Metrics();
7036
7037    @Override
7038    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
7039        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
7040        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
7041        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
7042        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
7043
7044        int width;
7045        int height;
7046
7047        BoringLayout.Metrics boring = UNKNOWN_BORING;
7048        BoringLayout.Metrics hintBoring = UNKNOWN_BORING;
7049
7050        if (mTextDir == null) {
7051            mTextDir = getTextDirectionHeuristic();
7052        }
7053
7054        int des = -1;
7055        boolean fromexisting = false;
7056
7057        if (widthMode == MeasureSpec.EXACTLY) {
7058            // Parent has told us how big to be. So be it.
7059            width = widthSize;
7060        } else {
7061            if (mLayout != null && mEllipsize == null) {
7062                des = desired(mLayout);
7063            }
7064
7065            if (des < 0) {
7066                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
7067                if (boring != null) {
7068                    mBoring = boring;
7069                }
7070            } else {
7071                fromexisting = true;
7072            }
7073
7074            if (boring == null || boring == UNKNOWN_BORING) {
7075                if (des < 0) {
7076                    des = (int) Math.ceil(Layout.getDesiredWidth(mTransformed, mTextPaint));
7077                }
7078                width = des;
7079            } else {
7080                width = boring.width;
7081            }
7082
7083            final Drawables dr = mDrawables;
7084            if (dr != null) {
7085                width = Math.max(width, dr.mDrawableWidthTop);
7086                width = Math.max(width, dr.mDrawableWidthBottom);
7087            }
7088
7089            if (mHint != null) {
7090                int hintDes = -1;
7091                int hintWidth;
7092
7093                if (mHintLayout != null && mEllipsize == null) {
7094                    hintDes = desired(mHintLayout);
7095                }
7096
7097                if (hintDes < 0) {
7098                    hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mTextDir, mHintBoring);
7099                    if (hintBoring != null) {
7100                        mHintBoring = hintBoring;
7101                    }
7102                }
7103
7104                if (hintBoring == null || hintBoring == UNKNOWN_BORING) {
7105                    if (hintDes < 0) {
7106                        hintDes = (int) Math.ceil(Layout.getDesiredWidth(mHint, mTextPaint));
7107                    }
7108                    hintWidth = hintDes;
7109                } else {
7110                    hintWidth = hintBoring.width;
7111                }
7112
7113                if (hintWidth > width) {
7114                    width = hintWidth;
7115                }
7116            }
7117
7118            width += getCompoundPaddingLeft() + getCompoundPaddingRight();
7119
7120            if (mMaxWidthMode == EMS) {
7121                width = Math.min(width, mMaxWidth * getLineHeight());
7122            } else {
7123                width = Math.min(width, mMaxWidth);
7124            }
7125
7126            if (mMinWidthMode == EMS) {
7127                width = Math.max(width, mMinWidth * getLineHeight());
7128            } else {
7129                width = Math.max(width, mMinWidth);
7130            }
7131
7132            // Check against our minimum width
7133            width = Math.max(width, getSuggestedMinimumWidth());
7134
7135            if (widthMode == MeasureSpec.AT_MOST) {
7136                width = Math.min(widthSize, width);
7137            }
7138        }
7139
7140        int want = width - getCompoundPaddingLeft() - getCompoundPaddingRight();
7141        int unpaddedWidth = want;
7142
7143        if (mHorizontallyScrolling) want = VERY_WIDE;
7144
7145        int hintWant = want;
7146        int hintWidth = (mHintLayout == null) ? hintWant : mHintLayout.getWidth();
7147
7148        if (mLayout == null) {
7149            makeNewLayout(want, hintWant, boring, hintBoring,
7150                          width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
7151        } else {
7152            final boolean layoutChanged = (mLayout.getWidth() != want) ||
7153                    (hintWidth != hintWant) ||
7154                    (mLayout.getEllipsizedWidth() !=
7155                            width - getCompoundPaddingLeft() - getCompoundPaddingRight());
7156
7157            final boolean widthChanged = (mHint == null) &&
7158                    (mEllipsize == null) &&
7159                    (want > mLayout.getWidth()) &&
7160                    (mLayout instanceof BoringLayout || (fromexisting && des >= 0 && des <= want));
7161
7162            final boolean maximumChanged = (mMaxMode != mOldMaxMode) || (mMaximum != mOldMaximum);
7163
7164            if (layoutChanged || maximumChanged) {
7165                if (!maximumChanged && widthChanged) {
7166                    mLayout.increaseWidthTo(want);
7167                } else {
7168                    makeNewLayout(want, hintWant, boring, hintBoring,
7169                            width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
7170                }
7171            } else {
7172                // Nothing has changed
7173            }
7174        }
7175
7176        if (heightMode == MeasureSpec.EXACTLY) {
7177            // Parent has told us how big to be. So be it.
7178            height = heightSize;
7179            mDesiredHeightAtMeasure = -1;
7180        } else {
7181            int desired = getDesiredHeight();
7182
7183            height = desired;
7184            mDesiredHeightAtMeasure = desired;
7185
7186            if (heightMode == MeasureSpec.AT_MOST) {
7187                height = Math.min(desired, heightSize);
7188            }
7189        }
7190
7191        int unpaddedHeight = height - getCompoundPaddingTop() - getCompoundPaddingBottom();
7192        if (mMaxMode == LINES && mLayout.getLineCount() > mMaximum) {
7193            unpaddedHeight = Math.min(unpaddedHeight, mLayout.getLineTop(mMaximum));
7194        }
7195
7196        /*
7197         * We didn't let makeNewLayout() register to bring the cursor into view,
7198         * so do it here if there is any possibility that it is needed.
7199         */
7200        if (mMovement != null ||
7201            mLayout.getWidth() > unpaddedWidth ||
7202            mLayout.getHeight() > unpaddedHeight) {
7203            registerForPreDraw();
7204        } else {
7205            scrollTo(0, 0);
7206        }
7207
7208        setMeasuredDimension(width, height);
7209    }
7210
7211    private int getDesiredHeight() {
7212        return Math.max(
7213                getDesiredHeight(mLayout, true),
7214                getDesiredHeight(mHintLayout, mEllipsize != null));
7215    }
7216
7217    private int getDesiredHeight(Layout layout, boolean cap) {
7218        if (layout == null) {
7219            return 0;
7220        }
7221
7222        int linecount = layout.getLineCount();
7223        int pad = getCompoundPaddingTop() + getCompoundPaddingBottom();
7224        int desired = layout.getLineTop(linecount);
7225
7226        final Drawables dr = mDrawables;
7227        if (dr != null) {
7228            desired = Math.max(desired, dr.mDrawableHeightLeft);
7229            desired = Math.max(desired, dr.mDrawableHeightRight);
7230        }
7231
7232        desired += pad;
7233
7234        if (mMaxMode == LINES) {
7235            /*
7236             * Don't cap the hint to a certain number of lines.
7237             * (Do cap it, though, if we have a maximum pixel height.)
7238             */
7239            if (cap) {
7240                if (linecount > mMaximum) {
7241                    desired = layout.getLineTop(mMaximum);
7242
7243                    if (dr != null) {
7244                        desired = Math.max(desired, dr.mDrawableHeightLeft);
7245                        desired = Math.max(desired, dr.mDrawableHeightRight);
7246                    }
7247
7248                    desired += pad;
7249                    linecount = mMaximum;
7250                }
7251            }
7252        } else {
7253            desired = Math.min(desired, mMaximum);
7254        }
7255
7256        if (mMinMode == LINES) {
7257            if (linecount < mMinimum) {
7258                desired += getLineHeight() * (mMinimum - linecount);
7259            }
7260        } else {
7261            desired = Math.max(desired, mMinimum);
7262        }
7263
7264        // Check against our minimum height
7265        desired = Math.max(desired, getSuggestedMinimumHeight());
7266
7267        return desired;
7268    }
7269
7270    /**
7271     * Check whether a change to the existing text layout requires a
7272     * new view layout.
7273     */
7274    private void checkForResize() {
7275        boolean sizeChanged = false;
7276
7277        if (mLayout != null) {
7278            // Check if our width changed
7279            if (mLayoutParams.width == LayoutParams.WRAP_CONTENT) {
7280                sizeChanged = true;
7281                invalidate();
7282            }
7283
7284            // Check if our height changed
7285            if (mLayoutParams.height == LayoutParams.WRAP_CONTENT) {
7286                int desiredHeight = getDesiredHeight();
7287
7288                if (desiredHeight != this.getHeight()) {
7289                    sizeChanged = true;
7290                }
7291            } else if (mLayoutParams.height == LayoutParams.MATCH_PARENT) {
7292                if (mDesiredHeightAtMeasure >= 0) {
7293                    int desiredHeight = getDesiredHeight();
7294
7295                    if (desiredHeight != mDesiredHeightAtMeasure) {
7296                        sizeChanged = true;
7297                    }
7298                }
7299            }
7300        }
7301
7302        if (sizeChanged) {
7303            requestLayout();
7304            // caller will have already invalidated
7305        }
7306    }
7307
7308    /**
7309     * Check whether entirely new text requires a new view layout
7310     * or merely a new text layout.
7311     */
7312    private void checkForRelayout() {
7313        // If we have a fixed width, we can just swap in a new text layout
7314        // if the text height stays the same or if the view height is fixed.
7315
7316        if ((mLayoutParams.width != LayoutParams.WRAP_CONTENT ||
7317                (mMaxWidthMode == mMinWidthMode && mMaxWidth == mMinWidth)) &&
7318                (mHint == null || mHintLayout != null) &&
7319                (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight() > 0)) {
7320            // Static width, so try making a new text layout.
7321
7322            int oldht = mLayout.getHeight();
7323            int want = mLayout.getWidth();
7324            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
7325
7326            /*
7327             * No need to bring the text into view, since the size is not
7328             * changing (unless we do the requestLayout(), in which case it
7329             * will happen at measure).
7330             */
7331            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
7332                          mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight(),
7333                          false);
7334
7335            if (mEllipsize != TextUtils.TruncateAt.MARQUEE) {
7336                // In a fixed-height view, so use our new text layout.
7337                if (mLayoutParams.height != LayoutParams.WRAP_CONTENT &&
7338                    mLayoutParams.height != LayoutParams.MATCH_PARENT) {
7339                    invalidate();
7340                    return;
7341                }
7342
7343                // Dynamic height, but height has stayed the same,
7344                // so use our new text layout.
7345                if (mLayout.getHeight() == oldht &&
7346                    (mHintLayout == null || mHintLayout.getHeight() == oldht)) {
7347                    invalidate();
7348                    return;
7349                }
7350            }
7351
7352            // We lose: the height has changed and we have a dynamic height.
7353            // Request a new view layout using our new text layout.
7354            requestLayout();
7355            invalidate();
7356        } else {
7357            // Dynamic width, so we have no choice but to request a new
7358            // view layout with a new text layout.
7359            nullLayouts();
7360            requestLayout();
7361            invalidate();
7362        }
7363    }
7364
7365    @Override
7366    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
7367        super.onLayout(changed, left, top, right, bottom);
7368        if (mDeferScroll >= 0) {
7369            int curs = mDeferScroll;
7370            mDeferScroll = -1;
7371            bringPointIntoView(Math.min(curs, mText.length()));
7372        }
7373    }
7374
7375    private boolean isShowingHint() {
7376        return TextUtils.isEmpty(mText) && !TextUtils.isEmpty(mHint);
7377    }
7378
7379    /**
7380     * Returns true if anything changed.
7381     */
7382    private boolean bringTextIntoView() {
7383        Layout layout = isShowingHint() ? mHintLayout : mLayout;
7384        int line = 0;
7385        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
7386            line = layout.getLineCount() - 1;
7387        }
7388
7389        Layout.Alignment a = layout.getParagraphAlignment(line);
7390        int dir = layout.getParagraphDirection(line);
7391        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
7392        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
7393        int ht = layout.getHeight();
7394
7395        int scrollx, scrolly;
7396
7397        // Convert to left, center, or right alignment.
7398        if (a == Layout.Alignment.ALIGN_NORMAL) {
7399            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_LEFT :
7400                Layout.Alignment.ALIGN_RIGHT;
7401        } else if (a == Layout.Alignment.ALIGN_OPPOSITE){
7402            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_RIGHT :
7403                Layout.Alignment.ALIGN_LEFT;
7404        }
7405
7406        if (a == Layout.Alignment.ALIGN_CENTER) {
7407            /*
7408             * Keep centered if possible, or, if it is too wide to fit,
7409             * keep leading edge in view.
7410             */
7411
7412            int left = (int) Math.floor(layout.getLineLeft(line));
7413            int right = (int) Math.ceil(layout.getLineRight(line));
7414
7415            if (right - left < hspace) {
7416                scrollx = (right + left) / 2 - hspace / 2;
7417            } else {
7418                if (dir < 0) {
7419                    scrollx = right - hspace;
7420                } else {
7421                    scrollx = left;
7422                }
7423            }
7424        } else if (a == Layout.Alignment.ALIGN_RIGHT) {
7425            int right = (int) Math.ceil(layout.getLineRight(line));
7426            scrollx = right - hspace;
7427        } else { // a == Layout.Alignment.ALIGN_LEFT (will also be the default)
7428            scrollx = (int) Math.floor(layout.getLineLeft(line));
7429        }
7430
7431        if (ht < vspace) {
7432            scrolly = 0;
7433        } else {
7434            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
7435                scrolly = ht - vspace;
7436            } else {
7437                scrolly = 0;
7438            }
7439        }
7440
7441        if (scrollx != mScrollX || scrolly != mScrollY) {
7442            scrollTo(scrollx, scrolly);
7443            return true;
7444        } else {
7445            return false;
7446        }
7447    }
7448
7449    /**
7450     * Move the point, specified by the offset, into the view if it is needed.
7451     * This has to be called after layout. Returns true if anything changed.
7452     */
7453    public boolean bringPointIntoView(int offset) {
7454        if (isLayoutRequested()) {
7455            mDeferScroll = offset;
7456            return false;
7457        }
7458        boolean changed = false;
7459
7460        Layout layout = isShowingHint() ? mHintLayout: mLayout;
7461
7462        if (layout == null) return changed;
7463
7464        int line = layout.getLineForOffset(offset);
7465
7466        int grav;
7467
7468        switch (layout.getParagraphAlignment(line)) {
7469            case ALIGN_LEFT:
7470                grav = 1;
7471                break;
7472            case ALIGN_RIGHT:
7473                grav = -1;
7474                break;
7475            case ALIGN_NORMAL:
7476                grav = layout.getParagraphDirection(line);
7477                break;
7478            case ALIGN_OPPOSITE:
7479                grav = -layout.getParagraphDirection(line);
7480                break;
7481            case ALIGN_CENTER:
7482            default:
7483                grav = 0;
7484                break;
7485        }
7486
7487        // We only want to clamp the cursor to fit within the layout width
7488        // in left-to-right modes, because in a right to left alignment,
7489        // we want to scroll to keep the line-right on the screen, as other
7490        // lines are likely to have text flush with the right margin, which
7491        // we want to keep visible.
7492        // A better long-term solution would probably be to measure both
7493        // the full line and a blank-trimmed version, and, for example, use
7494        // the latter measurement for centering and right alignment, but for
7495        // the time being we only implement the cursor clamping in left to
7496        // right where it is most likely to be annoying.
7497        final boolean clamped = grav > 0;
7498        // FIXME: Is it okay to truncate this, or should we round?
7499        final int x = (int)layout.getPrimaryHorizontal(offset, clamped);
7500        final int top = layout.getLineTop(line);
7501        final int bottom = layout.getLineTop(line + 1);
7502
7503        int left = (int) Math.floor(layout.getLineLeft(line));
7504        int right = (int) Math.ceil(layout.getLineRight(line));
7505        int ht = layout.getHeight();
7506
7507        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
7508        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
7509        if (!mHorizontallyScrolling && right - left > hspace && right > x) {
7510            // If cursor has been clamped, make sure we don't scroll.
7511            right = Math.max(x, left + hspace);
7512        }
7513
7514        int hslack = (bottom - top) / 2;
7515        int vslack = hslack;
7516
7517        if (vslack > vspace / 4)
7518            vslack = vspace / 4;
7519        if (hslack > hspace / 4)
7520            hslack = hspace / 4;
7521
7522        int hs = mScrollX;
7523        int vs = mScrollY;
7524
7525        if (top - vs < vslack)
7526            vs = top - vslack;
7527        if (bottom - vs > vspace - vslack)
7528            vs = bottom - (vspace - vslack);
7529        if (ht - vs < vspace)
7530            vs = ht - vspace;
7531        if (0 - vs > 0)
7532            vs = 0;
7533
7534        if (grav != 0) {
7535            if (x - hs < hslack) {
7536                hs = x - hslack;
7537            }
7538            if (x - hs > hspace - hslack) {
7539                hs = x - (hspace - hslack);
7540            }
7541        }
7542
7543        if (grav < 0) {
7544            if (left - hs > 0)
7545                hs = left;
7546            if (right - hs < hspace)
7547                hs = right - hspace;
7548        } else if (grav > 0) {
7549            if (right - hs < hspace)
7550                hs = right - hspace;
7551            if (left - hs > 0)
7552                hs = left;
7553        } else /* grav == 0 */ {
7554            if (right - left <= hspace) {
7555                /*
7556                 * If the entire text fits, center it exactly.
7557                 */
7558                hs = left - (hspace - (right - left)) / 2;
7559            } else if (x > right - hslack) {
7560                /*
7561                 * If we are near the right edge, keep the right edge
7562                 * at the edge of the view.
7563                 */
7564                hs = right - hspace;
7565            } else if (x < left + hslack) {
7566                /*
7567                 * If we are near the left edge, keep the left edge
7568                 * at the edge of the view.
7569                 */
7570                hs = left;
7571            } else if (left > hs) {
7572                /*
7573                 * Is there whitespace visible at the left?  Fix it if so.
7574                 */
7575                hs = left;
7576            } else if (right < hs + hspace) {
7577                /*
7578                 * Is there whitespace visible at the right?  Fix it if so.
7579                 */
7580                hs = right - hspace;
7581            } else {
7582                /*
7583                 * Otherwise, float as needed.
7584                 */
7585                if (x - hs < hslack) {
7586                    hs = x - hslack;
7587                }
7588                if (x - hs > hspace - hslack) {
7589                    hs = x - (hspace - hslack);
7590                }
7591            }
7592        }
7593
7594        if (hs != mScrollX || vs != mScrollY) {
7595            if (mScroller == null) {
7596                scrollTo(hs, vs);
7597            } else {
7598                long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll;
7599                int dx = hs - mScrollX;
7600                int dy = vs - mScrollY;
7601
7602                if (duration > ANIMATED_SCROLL_GAP) {
7603                    mScroller.startScroll(mScrollX, mScrollY, dx, dy);
7604                    awakenScrollBars(mScroller.getDuration());
7605                    invalidate();
7606                } else {
7607                    if (!mScroller.isFinished()) {
7608                        mScroller.abortAnimation();
7609                    }
7610
7611                    scrollBy(dx, dy);
7612                }
7613
7614                mLastScroll = AnimationUtils.currentAnimationTimeMillis();
7615            }
7616
7617            changed = true;
7618        }
7619
7620        if (isFocused()) {
7621            // This offsets because getInterestingRect() is in terms of viewport coordinates, but
7622            // requestRectangleOnScreen() is in terms of content coordinates.
7623
7624            // The offsets here are to ensure the rectangle we are using is
7625            // within our view bounds, in case the cursor is on the far left
7626            // or right.  If it isn't withing the bounds, then this request
7627            // will be ignored.
7628            if (mTempRect == null) mTempRect = new Rect();
7629            mTempRect.set(x - 2, top, x + 2, bottom);
7630            getInterestingRect(mTempRect, line);
7631            mTempRect.offset(mScrollX, mScrollY);
7632
7633            if (requestRectangleOnScreen(mTempRect)) {
7634                changed = true;
7635            }
7636        }
7637
7638        return changed;
7639    }
7640
7641    /**
7642     * Move the cursor, if needed, so that it is at an offset that is visible
7643     * to the user.  This will not move the cursor if it represents more than
7644     * one character (a selection range).  This will only work if the
7645     * TextView contains spannable text; otherwise it will do nothing.
7646     *
7647     * @return True if the cursor was actually moved, false otherwise.
7648     */
7649    public boolean moveCursorToVisibleOffset() {
7650        if (!(mText instanceof Spannable)) {
7651            return false;
7652        }
7653        int start = getSelectionStart();
7654        int end = getSelectionEnd();
7655        if (start != end) {
7656            return false;
7657        }
7658
7659        // First: make sure the line is visible on screen:
7660
7661        int line = mLayout.getLineForOffset(start);
7662
7663        final int top = mLayout.getLineTop(line);
7664        final int bottom = mLayout.getLineTop(line + 1);
7665        final int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
7666        int vslack = (bottom - top) / 2;
7667        if (vslack > vspace / 4)
7668            vslack = vspace / 4;
7669        final int vs = mScrollY;
7670
7671        if (top < (vs+vslack)) {
7672            line = mLayout.getLineForVertical(vs+vslack+(bottom-top));
7673        } else if (bottom > (vspace+vs-vslack)) {
7674            line = mLayout.getLineForVertical(vspace+vs-vslack-(bottom-top));
7675        }
7676
7677        // Next: make sure the character is visible on screen:
7678
7679        final int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
7680        final int hs = mScrollX;
7681        final int leftChar = mLayout.getOffsetForHorizontal(line, hs);
7682        final int rightChar = mLayout.getOffsetForHorizontal(line, hspace+hs);
7683
7684        // line might contain bidirectional text
7685        final int lowChar = leftChar < rightChar ? leftChar : rightChar;
7686        final int highChar = leftChar > rightChar ? leftChar : rightChar;
7687
7688        int newStart = start;
7689        if (newStart < lowChar) {
7690            newStart = lowChar;
7691        } else if (newStart > highChar) {
7692            newStart = highChar;
7693        }
7694
7695        if (newStart != start) {
7696            Selection.setSelection((Spannable)mText, newStart);
7697            return true;
7698        }
7699
7700        return false;
7701    }
7702
7703    @Override
7704    public void computeScroll() {
7705        if (mScroller != null) {
7706            if (mScroller.computeScrollOffset()) {
7707                mScrollX = mScroller.getCurrX();
7708                mScrollY = mScroller.getCurrY();
7709                invalidateParentCaches();
7710                postInvalidate();  // So we draw again
7711            }
7712        }
7713    }
7714
7715    private void getInterestingRect(Rect r, int line) {
7716        convertFromViewportToContentCoordinates(r);
7717
7718        // Rectangle can can be expanded on first and last line to take
7719        // padding into account.
7720        // TODO Take left/right padding into account too?
7721        if (line == 0) r.top -= getExtendedPaddingTop();
7722        if (line == mLayout.getLineCount() - 1) r.bottom += getExtendedPaddingBottom();
7723    }
7724
7725    private void convertFromViewportToContentCoordinates(Rect r) {
7726        final int horizontalOffset = viewportToContentHorizontalOffset();
7727        r.left += horizontalOffset;
7728        r.right += horizontalOffset;
7729
7730        final int verticalOffset = viewportToContentVerticalOffset();
7731        r.top += verticalOffset;
7732        r.bottom += verticalOffset;
7733    }
7734
7735    int viewportToContentHorizontalOffset() {
7736        return getCompoundPaddingLeft() - mScrollX;
7737    }
7738
7739    int viewportToContentVerticalOffset() {
7740        int offset = getExtendedPaddingTop() - mScrollY;
7741        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
7742            offset += getVerticalOffset(false);
7743        }
7744        return offset;
7745    }
7746
7747    @Override
7748    public void debug(int depth) {
7749        super.debug(depth);
7750
7751        String output = debugIndent(depth);
7752        output += "frame={" + mLeft + ", " + mTop + ", " + mRight
7753                + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY
7754                + "} ";
7755
7756        if (mText != null) {
7757
7758            output += "mText=\"" + mText + "\" ";
7759            if (mLayout != null) {
7760                output += "mLayout width=" + mLayout.getWidth()
7761                        + " height=" + mLayout.getHeight();
7762            }
7763        } else {
7764            output += "mText=NULL";
7765        }
7766        Log.d(VIEW_LOG_TAG, output);
7767    }
7768
7769    /**
7770     * Convenience for {@link Selection#getSelectionStart}.
7771     */
7772    @ViewDebug.ExportedProperty(category = "text")
7773    public int getSelectionStart() {
7774        return Selection.getSelectionStart(getText());
7775    }
7776
7777    /**
7778     * Convenience for {@link Selection#getSelectionEnd}.
7779     */
7780    @ViewDebug.ExportedProperty(category = "text")
7781    public int getSelectionEnd() {
7782        return Selection.getSelectionEnd(getText());
7783    }
7784
7785    /**
7786     * Return true iff there is a selection inside this text view.
7787     */
7788    public boolean hasSelection() {
7789        final int selectionStart = getSelectionStart();
7790        final int selectionEnd = getSelectionEnd();
7791
7792        return selectionStart >= 0 && selectionStart != selectionEnd;
7793    }
7794
7795    String getSelectedText() {
7796        if (!hasSelection()) {
7797            return null;
7798        }
7799
7800        final int start = getSelectionStart();
7801        final int end = getSelectionEnd();
7802        return String.valueOf(
7803                start > end ? mText.subSequence(end, start) : mText.subSequence(start, end));
7804    }
7805
7806    /**
7807     * Sets the properties of this field (lines, horizontally scrolling,
7808     * transformation method) to be for a single-line input.
7809     *
7810     * @attr ref android.R.styleable#TextView_singleLine
7811     */
7812    public void setSingleLine() {
7813        setSingleLine(true);
7814    }
7815
7816    /**
7817     * Sets the properties of this field to transform input to ALL CAPS
7818     * display. This may use a "small caps" formatting if available.
7819     * This setting will be ignored if this field is editable or selectable.
7820     *
7821     * This call replaces the current transformation method. Disabling this
7822     * will not necessarily restore the previous behavior from before this
7823     * was enabled.
7824     *
7825     * @see #setTransformationMethod(TransformationMethod)
7826     * @attr ref android.R.styleable#TextView_textAllCaps
7827     */
7828    public void setAllCaps(boolean allCaps) {
7829        if (allCaps) {
7830            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
7831        } else {
7832            setTransformationMethod(null);
7833        }
7834    }
7835
7836    /**
7837     * If true, sets the properties of this field (number of lines, horizontally scrolling,
7838     * transformation method) to be for a single-line input; if false, restores these to the default
7839     * conditions.
7840     *
7841     * Note that the default conditions are not necessarily those that were in effect prior this
7842     * method, and you may want to reset these properties to your custom values.
7843     *
7844     * @attr ref android.R.styleable#TextView_singleLine
7845     */
7846    @android.view.RemotableViewMethod
7847    public void setSingleLine(boolean singleLine) {
7848        // Could be used, but may break backward compatibility.
7849        // if (mSingleLine == singleLine) return;
7850        setInputTypeSingleLine(singleLine);
7851        applySingleLine(singleLine, true, true);
7852    }
7853
7854    /**
7855     * Adds or remove the EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE on the mInputType.
7856     * @param singleLine
7857     */
7858    private void setInputTypeSingleLine(boolean singleLine) {
7859        if (mEditor != null &&
7860                (mEditor.mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
7861            if (singleLine) {
7862                mEditor.mInputType &= ~EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
7863            } else {
7864                mEditor.mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
7865            }
7866        }
7867    }
7868
7869    private void applySingleLine(boolean singleLine, boolean applyTransformation,
7870            boolean changeMaxLines) {
7871        mSingleLine = singleLine;
7872        if (singleLine) {
7873            setLines(1);
7874            setHorizontallyScrolling(true);
7875            if (applyTransformation) {
7876                setTransformationMethod(SingleLineTransformationMethod.getInstance());
7877            }
7878        } else {
7879            if (changeMaxLines) {
7880                setMaxLines(Integer.MAX_VALUE);
7881            }
7882            setHorizontallyScrolling(false);
7883            if (applyTransformation) {
7884                setTransformationMethod(null);
7885            }
7886        }
7887    }
7888
7889    /**
7890     * Causes words in the text that are longer than the view is wide
7891     * to be ellipsized instead of broken in the middle.  You may also
7892     * want to {@link #setSingleLine} or {@link #setHorizontallyScrolling}
7893     * to constrain the text to a single line.  Use <code>null</code>
7894     * to turn off ellipsizing.
7895     *
7896     * If {@link #setMaxLines} has been used to set two or more lines,
7897     * only {@link android.text.TextUtils.TruncateAt#END} and
7898     * {@link android.text.TextUtils.TruncateAt#MARQUEE} are supported
7899     * (other ellipsizing types will not do anything).
7900     *
7901     * @attr ref android.R.styleable#TextView_ellipsize
7902     */
7903    public void setEllipsize(TextUtils.TruncateAt where) {
7904        // TruncateAt is an enum. != comparison is ok between these singleton objects.
7905        if (mEllipsize != where) {
7906            mEllipsize = where;
7907
7908            if (mLayout != null) {
7909                nullLayouts();
7910                requestLayout();
7911                invalidate();
7912            }
7913        }
7914    }
7915
7916    /**
7917     * Sets how many times to repeat the marquee animation. Only applied if the
7918     * TextView has marquee enabled. Set to -1 to repeat indefinitely.
7919     *
7920     * @see #getMarqueeRepeatLimit()
7921     *
7922     * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
7923     */
7924    public void setMarqueeRepeatLimit(int marqueeLimit) {
7925        mMarqueeRepeatLimit = marqueeLimit;
7926    }
7927
7928    /**
7929     * Gets the number of times the marquee animation is repeated. Only meaningful if the
7930     * TextView has marquee enabled.
7931     *
7932     * @return the number of times the marquee animation is repeated. -1 if the animation
7933     * repeats indefinitely
7934     *
7935     * @see #setMarqueeRepeatLimit(int)
7936     *
7937     * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
7938     */
7939    public int getMarqueeRepeatLimit() {
7940        return mMarqueeRepeatLimit;
7941    }
7942
7943    /**
7944     * Returns where, if anywhere, words that are longer than the view
7945     * is wide should be ellipsized.
7946     */
7947    @ViewDebug.ExportedProperty
7948    public TextUtils.TruncateAt getEllipsize() {
7949        return mEllipsize;
7950    }
7951
7952    /**
7953     * Set the TextView so that when it takes focus, all the text is
7954     * selected.
7955     *
7956     * @attr ref android.R.styleable#TextView_selectAllOnFocus
7957     */
7958    @android.view.RemotableViewMethod
7959    public void setSelectAllOnFocus(boolean selectAllOnFocus) {
7960        createEditorIfNeeded();
7961        mEditor.mSelectAllOnFocus = selectAllOnFocus;
7962
7963        if (selectAllOnFocus && !(mText instanceof Spannable)) {
7964            setText(mText, BufferType.SPANNABLE);
7965        }
7966    }
7967
7968    /**
7969     * Set whether the cursor is visible. The default is true. Note that this property only
7970     * makes sense for editable TextView.
7971     *
7972     * @see #isCursorVisible()
7973     *
7974     * @attr ref android.R.styleable#TextView_cursorVisible
7975     */
7976    @android.view.RemotableViewMethod
7977    public void setCursorVisible(boolean visible) {
7978        if (visible && mEditor == null) return; // visible is the default value with no edit data
7979        createEditorIfNeeded();
7980        if (mEditor.mCursorVisible != visible) {
7981            mEditor.mCursorVisible = visible;
7982            invalidate();
7983
7984            mEditor.makeBlink();
7985
7986            // InsertionPointCursorController depends on mCursorVisible
7987            mEditor.prepareCursorControllers();
7988        }
7989    }
7990
7991    /**
7992     * @return whether or not the cursor is visible (assuming this TextView is editable)
7993     *
7994     * @see #setCursorVisible(boolean)
7995     *
7996     * @attr ref android.R.styleable#TextView_cursorVisible
7997     */
7998    public boolean isCursorVisible() {
7999        // true is the default value
8000        return mEditor == null ? true : mEditor.mCursorVisible;
8001    }
8002
8003    private boolean canMarquee() {
8004        int width = (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight());
8005        return width > 0 && (mLayout.getLineWidth(0) > width ||
8006                (mMarqueeFadeMode != MARQUEE_FADE_NORMAL && mSavedMarqueeModeLayout != null &&
8007                        mSavedMarqueeModeLayout.getLineWidth(0) > width));
8008    }
8009
8010    private void startMarquee() {
8011        // Do not ellipsize EditText
8012        if (getKeyListener() != null) return;
8013
8014        if (compressText(getWidth() - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
8015            return;
8016        }
8017
8018        if ((mMarquee == null || mMarquee.isStopped()) && (isFocused() || isSelected()) &&
8019                getLineCount() == 1 && canMarquee()) {
8020
8021            if (mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
8022                mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_FADE;
8023                final Layout tmp = mLayout;
8024                mLayout = mSavedMarqueeModeLayout;
8025                mSavedMarqueeModeLayout = tmp;
8026                setHorizontalFadingEdgeEnabled(true);
8027                requestLayout();
8028                invalidate();
8029            }
8030
8031            if (mMarquee == null) mMarquee = new Marquee(this);
8032            mMarquee.start(mMarqueeRepeatLimit);
8033        }
8034    }
8035
8036    private void stopMarquee() {
8037        if (mMarquee != null && !mMarquee.isStopped()) {
8038            mMarquee.stop();
8039        }
8040
8041        if (mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_FADE) {
8042            mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
8043            final Layout tmp = mSavedMarqueeModeLayout;
8044            mSavedMarqueeModeLayout = mLayout;
8045            mLayout = tmp;
8046            setHorizontalFadingEdgeEnabled(false);
8047            requestLayout();
8048            invalidate();
8049        }
8050    }
8051
8052    private void startStopMarquee(boolean start) {
8053        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
8054            if (start) {
8055                startMarquee();
8056            } else {
8057                stopMarquee();
8058            }
8059        }
8060    }
8061
8062    /**
8063     * This method is called when the text is changed, in case any subclasses
8064     * would like to know.
8065     *
8066     * Within <code>text</code>, the <code>lengthAfter</code> characters
8067     * beginning at <code>start</code> have just replaced old text that had
8068     * length <code>lengthBefore</code>. It is an error to attempt to make
8069     * changes to <code>text</code> from this callback.
8070     *
8071     * @param text The text the TextView is displaying
8072     * @param start The offset of the start of the range of the text that was
8073     * modified
8074     * @param lengthBefore The length of the former text that has been replaced
8075     * @param lengthAfter The length of the replacement modified text
8076     */
8077    protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
8078        // intentionally empty, template pattern method can be overridden by subclasses
8079    }
8080
8081    /**
8082     * This method is called when the selection has changed, in case any
8083     * subclasses would like to know.
8084     *
8085     * @param selStart The new selection start location.
8086     * @param selEnd The new selection end location.
8087     */
8088    protected void onSelectionChanged(int selStart, int selEnd) {
8089        sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED);
8090    }
8091
8092    /**
8093     * Adds a TextWatcher to the list of those whose methods are called
8094     * whenever this TextView's text changes.
8095     * <p>
8096     * In 1.0, the {@link TextWatcher#afterTextChanged} method was erroneously
8097     * not called after {@link #setText} calls.  Now, doing {@link #setText}
8098     * if there are any text changed listeners forces the buffer type to
8099     * Editable if it would not otherwise be and does call this method.
8100     */
8101    public void addTextChangedListener(TextWatcher watcher) {
8102        if (mListeners == null) {
8103            mListeners = new ArrayList<TextWatcher>();
8104        }
8105
8106        mListeners.add(watcher);
8107    }
8108
8109    /**
8110     * Removes the specified TextWatcher from the list of those whose
8111     * methods are called
8112     * whenever this TextView's text changes.
8113     */
8114    public void removeTextChangedListener(TextWatcher watcher) {
8115        if (mListeners != null) {
8116            int i = mListeners.indexOf(watcher);
8117
8118            if (i >= 0) {
8119                mListeners.remove(i);
8120            }
8121        }
8122    }
8123
8124    private void sendBeforeTextChanged(CharSequence text, int start, int before, int after) {
8125        if (mListeners != null) {
8126            final ArrayList<TextWatcher> list = mListeners;
8127            final int count = list.size();
8128            for (int i = 0; i < count; i++) {
8129                list.get(i).beforeTextChanged(text, start, before, after);
8130            }
8131        }
8132
8133        // The spans that are inside or intersect the modified region no longer make sense
8134        removeIntersectingNonAdjacentSpans(start, start + before, SpellCheckSpan.class);
8135        removeIntersectingNonAdjacentSpans(start, start + before, SuggestionSpan.class);
8136    }
8137
8138    // Removes all spans that are inside or actually overlap the start..end range
8139    private <T> void removeIntersectingNonAdjacentSpans(int start, int end, Class<T> type) {
8140        if (!(mText instanceof Editable)) return;
8141        Editable text = (Editable) mText;
8142
8143        T[] spans = text.getSpans(start, end, type);
8144        final int length = spans.length;
8145        for (int i = 0; i < length; i++) {
8146            final int spanStart = text.getSpanStart(spans[i]);
8147            final int spanEnd = text.getSpanEnd(spans[i]);
8148            if (spanEnd == start || spanStart == end) break;
8149            text.removeSpan(spans[i]);
8150        }
8151    }
8152
8153    void removeAdjacentSuggestionSpans(final int pos) {
8154        if (!(mText instanceof Editable)) return;
8155        final Editable text = (Editable) mText;
8156
8157        final SuggestionSpan[] spans = text.getSpans(pos, pos, SuggestionSpan.class);
8158        final int length = spans.length;
8159        for (int i = 0; i < length; i++) {
8160            final int spanStart = text.getSpanStart(spans[i]);
8161            final int spanEnd = text.getSpanEnd(spans[i]);
8162            if (spanEnd == pos || spanStart == pos) {
8163                if (SpellChecker.haveWordBoundariesChanged(text, pos, pos, spanStart, spanEnd)) {
8164                    text.removeSpan(spans[i]);
8165                }
8166            }
8167        }
8168    }
8169
8170    /**
8171     * Not private so it can be called from an inner class without going
8172     * through a thunk.
8173     */
8174    void sendOnTextChanged(CharSequence text, int start, int before, int after) {
8175        if (mListeners != null) {
8176            final ArrayList<TextWatcher> list = mListeners;
8177            final int count = list.size();
8178            for (int i = 0; i < count; i++) {
8179                list.get(i).onTextChanged(text, start, before, after);
8180            }
8181        }
8182
8183        if (mEditor != null) mEditor.sendOnTextChanged(start, after);
8184    }
8185
8186    /**
8187     * Not private so it can be called from an inner class without going
8188     * through a thunk.
8189     */
8190    void sendAfterTextChanged(Editable text) {
8191        if (mListeners != null) {
8192            final ArrayList<TextWatcher> list = mListeners;
8193            final int count = list.size();
8194            for (int i = 0; i < count; i++) {
8195                list.get(i).afterTextChanged(text);
8196            }
8197        }
8198        hideErrorIfUnchanged();
8199    }
8200
8201    void updateAfterEdit() {
8202        invalidate();
8203        int curs = getSelectionStart();
8204
8205        if (curs >= 0 || (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
8206            registerForPreDraw();
8207        }
8208
8209        checkForResize();
8210
8211        if (curs >= 0) {
8212            mHighlightPathBogus = true;
8213            if (mEditor != null) mEditor.makeBlink();
8214            bringPointIntoView(curs);
8215        }
8216    }
8217
8218    /**
8219     * Not private so it can be called from an inner class without going
8220     * through a thunk.
8221     */
8222    void handleTextChanged(CharSequence buffer, int start, int before, int after) {
8223        sLastCutCopyOrTextChangedTime = 0;
8224
8225        final Editor.InputMethodState ims = mEditor == null ? null : mEditor.mInputMethodState;
8226        if (ims == null || ims.mBatchEditNesting == 0) {
8227            updateAfterEdit();
8228        }
8229        if (ims != null) {
8230            ims.mContentChanged = true;
8231            if (ims.mChangedStart < 0) {
8232                ims.mChangedStart = start;
8233                ims.mChangedEnd = start+before;
8234            } else {
8235                ims.mChangedStart = Math.min(ims.mChangedStart, start);
8236                ims.mChangedEnd = Math.max(ims.mChangedEnd, start + before - ims.mChangedDelta);
8237            }
8238            ims.mChangedDelta += after-before;
8239        }
8240        resetErrorChangedFlag();
8241        sendOnTextChanged(buffer, start, before, after);
8242        onTextChanged(buffer, start, before, after);
8243    }
8244
8245    /**
8246     * Not private so it can be called from an inner class without going
8247     * through a thunk.
8248     */
8249    void spanChange(Spanned buf, Object what, int oldStart, int newStart, int oldEnd, int newEnd) {
8250        // XXX Make the start and end move together if this ends up
8251        // spending too much time invalidating.
8252
8253        boolean selChanged = false;
8254        int newSelStart=-1, newSelEnd=-1;
8255
8256        final Editor.InputMethodState ims = mEditor == null ? null : mEditor.mInputMethodState;
8257
8258        if (what == Selection.SELECTION_END) {
8259            selChanged = true;
8260            newSelEnd = newStart;
8261
8262            if (oldStart >= 0 || newStart >= 0) {
8263                invalidateCursor(Selection.getSelectionStart(buf), oldStart, newStart);
8264                checkForResize();
8265                registerForPreDraw();
8266                if (mEditor != null) mEditor.makeBlink();
8267            }
8268        }
8269
8270        if (what == Selection.SELECTION_START) {
8271            selChanged = true;
8272            newSelStart = newStart;
8273
8274            if (oldStart >= 0 || newStart >= 0) {
8275                int end = Selection.getSelectionEnd(buf);
8276                invalidateCursor(end, oldStart, newStart);
8277            }
8278        }
8279
8280        if (selChanged) {
8281            mHighlightPathBogus = true;
8282            if (mEditor != null && !isFocused()) mEditor.mSelectionMoved = true;
8283
8284            if ((buf.getSpanFlags(what)&Spanned.SPAN_INTERMEDIATE) == 0) {
8285                if (newSelStart < 0) {
8286                    newSelStart = Selection.getSelectionStart(buf);
8287                }
8288                if (newSelEnd < 0) {
8289                    newSelEnd = Selection.getSelectionEnd(buf);
8290                }
8291                onSelectionChanged(newSelStart, newSelEnd);
8292            }
8293        }
8294
8295        if (what instanceof UpdateAppearance || what instanceof ParagraphStyle ||
8296                what instanceof CharacterStyle) {
8297            if (ims == null || ims.mBatchEditNesting == 0) {
8298                invalidate();
8299                mHighlightPathBogus = true;
8300                checkForResize();
8301            } else {
8302                ims.mContentChanged = true;
8303            }
8304            if (mEditor != null) {
8305                if (oldStart >= 0) mEditor.invalidateTextDisplayList(mLayout, oldStart, oldEnd);
8306                if (newStart >= 0) mEditor.invalidateTextDisplayList(mLayout, newStart, newEnd);
8307            }
8308        }
8309
8310        if (MetaKeyKeyListener.isMetaTracker(buf, what)) {
8311            mHighlightPathBogus = true;
8312            if (ims != null && MetaKeyKeyListener.isSelectingMetaTracker(buf, what)) {
8313                ims.mSelectionModeChanged = true;
8314            }
8315
8316            if (Selection.getSelectionStart(buf) >= 0) {
8317                if (ims == null || ims.mBatchEditNesting == 0) {
8318                    invalidateCursor();
8319                } else {
8320                    ims.mCursorChanged = true;
8321                }
8322            }
8323        }
8324
8325        if (what instanceof ParcelableSpan) {
8326            // If this is a span that can be sent to a remote process,
8327            // the current extract editor would be interested in it.
8328            if (ims != null && ims.mExtractedTextRequest != null) {
8329                if (ims.mBatchEditNesting != 0) {
8330                    if (oldStart >= 0) {
8331                        if (ims.mChangedStart > oldStart) {
8332                            ims.mChangedStart = oldStart;
8333                        }
8334                        if (ims.mChangedStart > oldEnd) {
8335                            ims.mChangedStart = oldEnd;
8336                        }
8337                    }
8338                    if (newStart >= 0) {
8339                        if (ims.mChangedStart > newStart) {
8340                            ims.mChangedStart = newStart;
8341                        }
8342                        if (ims.mChangedStart > newEnd) {
8343                            ims.mChangedStart = newEnd;
8344                        }
8345                    }
8346                } else {
8347                    if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Span change outside of batch: "
8348                            + oldStart + "-" + oldEnd + ","
8349                            + newStart + "-" + newEnd + " " + what);
8350                    ims.mContentChanged = true;
8351                }
8352            }
8353        }
8354
8355        if (mEditor != null && mEditor.mSpellChecker != null && newStart < 0 &&
8356                what instanceof SpellCheckSpan) {
8357            mEditor.mSpellChecker.onSpellCheckSpanRemoved((SpellCheckSpan) what);
8358        }
8359    }
8360
8361    /**
8362     * @hide
8363     */
8364    @Override
8365    public void dispatchFinishTemporaryDetach() {
8366        mDispatchTemporaryDetach = true;
8367        super.dispatchFinishTemporaryDetach();
8368        mDispatchTemporaryDetach = false;
8369    }
8370
8371    @Override
8372    public void onStartTemporaryDetach() {
8373        super.onStartTemporaryDetach();
8374        // Only track when onStartTemporaryDetach() is called directly,
8375        // usually because this instance is an editable field in a list
8376        if (!mDispatchTemporaryDetach) mTemporaryDetach = true;
8377
8378        // Tell the editor that we are temporarily detached. It can use this to preserve
8379        // selection state as needed.
8380        if (mEditor != null) mEditor.mTemporaryDetach = true;
8381    }
8382
8383    @Override
8384    public void onFinishTemporaryDetach() {
8385        super.onFinishTemporaryDetach();
8386        // Only track when onStartTemporaryDetach() is called directly,
8387        // usually because this instance is an editable field in a list
8388        if (!mDispatchTemporaryDetach) mTemporaryDetach = false;
8389        if (mEditor != null) mEditor.mTemporaryDetach = false;
8390    }
8391
8392    @Override
8393    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
8394        if (mTemporaryDetach) {
8395            // If we are temporarily in the detach state, then do nothing.
8396            super.onFocusChanged(focused, direction, previouslyFocusedRect);
8397            return;
8398        }
8399
8400        if (mEditor != null) mEditor.onFocusChanged(focused, direction);
8401
8402        if (focused) {
8403            if (mText instanceof Spannable) {
8404                Spannable sp = (Spannable) mText;
8405                MetaKeyKeyListener.resetMetaState(sp);
8406            }
8407        }
8408
8409        startStopMarquee(focused);
8410
8411        if (mTransformation != null) {
8412            mTransformation.onFocusChanged(this, mText, focused, direction, previouslyFocusedRect);
8413        }
8414
8415        super.onFocusChanged(focused, direction, previouslyFocusedRect);
8416    }
8417
8418    @Override
8419    public void onWindowFocusChanged(boolean hasWindowFocus) {
8420        super.onWindowFocusChanged(hasWindowFocus);
8421
8422        if (mEditor != null) mEditor.onWindowFocusChanged(hasWindowFocus);
8423
8424        startStopMarquee(hasWindowFocus);
8425    }
8426
8427    @Override
8428    protected void onVisibilityChanged(View changedView, int visibility) {
8429        super.onVisibilityChanged(changedView, visibility);
8430        if (mEditor != null && visibility != VISIBLE) {
8431            mEditor.hideCursorAndSpanControllers();
8432            stopTextActionMode();
8433        }
8434    }
8435
8436    /**
8437     * Use {@link BaseInputConnection#removeComposingSpans
8438     * BaseInputConnection.removeComposingSpans()} to remove any IME composing
8439     * state from this text view.
8440     */
8441    public void clearComposingText() {
8442        if (mText instanceof Spannable) {
8443            BaseInputConnection.removeComposingSpans((Spannable)mText);
8444        }
8445    }
8446
8447    @Override
8448    public void setSelected(boolean selected) {
8449        boolean wasSelected = isSelected();
8450
8451        super.setSelected(selected);
8452
8453        if (selected != wasSelected && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
8454            if (selected) {
8455                startMarquee();
8456            } else {
8457                stopMarquee();
8458            }
8459        }
8460    }
8461
8462    @Override
8463    public boolean onTouchEvent(MotionEvent event) {
8464        final int action = event.getActionMasked();
8465        if (mEditor != null) {
8466            mEditor.onTouchEvent(event);
8467
8468            if (mEditor.mSelectionModifierCursorController != null &&
8469                    mEditor.mSelectionModifierCursorController.isDragAcceleratorActive()) {
8470                return true;
8471            }
8472        }
8473
8474        final boolean superResult = super.onTouchEvent(event);
8475
8476        /*
8477         * Don't handle the release after a long press, because it will move the selection away from
8478         * whatever the menu action was trying to affect. If the long press should have triggered an
8479         * insertion action mode, we can now actually show it.
8480         */
8481        if (mEditor != null && mEditor.mDiscardNextActionUp && action == MotionEvent.ACTION_UP) {
8482            mEditor.mDiscardNextActionUp = false;
8483
8484            if (mEditor.mIsInsertionActionModeStartPending) {
8485                mEditor.startInsertionActionMode();
8486                mEditor.mIsInsertionActionModeStartPending = false;
8487            }
8488            return superResult;
8489        }
8490
8491        final boolean touchIsFinished = (action == MotionEvent.ACTION_UP) &&
8492                (mEditor == null || !mEditor.mIgnoreActionUpEvent) && isFocused();
8493
8494         if ((mMovement != null || onCheckIsTextEditor()) && isEnabled()
8495                && mText instanceof Spannable && mLayout != null) {
8496            boolean handled = false;
8497
8498            if (mMovement != null) {
8499                handled |= mMovement.onTouchEvent(this, (Spannable) mText, event);
8500            }
8501
8502            final boolean textIsSelectable = isTextSelectable();
8503            if (touchIsFinished && mLinksClickable && mAutoLinkMask != 0 && textIsSelectable) {
8504                // The LinkMovementMethod which should handle taps on links has not been installed
8505                // on non editable text that support text selection.
8506                // We reproduce its behavior here to open links for these.
8507                ClickableSpan[] links = ((Spannable) mText).getSpans(getSelectionStart(),
8508                        getSelectionEnd(), ClickableSpan.class);
8509
8510                if (links.length > 0) {
8511                    links[0].onClick(this);
8512                    handled = true;
8513                }
8514            }
8515
8516            if (touchIsFinished && (isTextEditable() || textIsSelectable)) {
8517                // Show the IME, except when selecting in read-only text.
8518                final InputMethodManager imm = InputMethodManager.peekInstance();
8519                viewClicked(imm);
8520                if (!textIsSelectable && mEditor.mShowSoftInputOnFocus) {
8521                    handled |= imm != null && imm.showSoftInput(this, 0);
8522                }
8523
8524                // The above condition ensures that the mEditor is not null
8525                mEditor.onTouchUpEvent(event);
8526
8527                handled = true;
8528            }
8529
8530            if (handled) {
8531                return true;
8532            }
8533        }
8534
8535        return superResult;
8536    }
8537
8538    @Override
8539    public boolean onGenericMotionEvent(MotionEvent event) {
8540        if (mMovement != null && mText instanceof Spannable && mLayout != null) {
8541            try {
8542                if (mMovement.onGenericMotionEvent(this, (Spannable) mText, event)) {
8543                    return true;
8544                }
8545            } catch (AbstractMethodError ex) {
8546                // onGenericMotionEvent was added to the MovementMethod interface in API 12.
8547                // Ignore its absence in case third party applications implemented the
8548                // interface directly.
8549            }
8550        }
8551        return super.onGenericMotionEvent(event);
8552    }
8553
8554    @Override
8555    protected void onCreateContextMenu(ContextMenu menu) {
8556        if (mEditor != null) {
8557            mEditor.onCreateContextMenu(menu);
8558        }
8559    }
8560
8561    @Override
8562    public boolean showContextMenu() {
8563        if (mEditor != null) {
8564            mEditor.setContextMenuAnchor(Float.NaN, Float.NaN);
8565        }
8566        return super.showContextMenu();
8567    }
8568
8569    @Override
8570    public boolean showContextMenu(float x, float y) {
8571        if (mEditor != null) {
8572            mEditor.setContextMenuAnchor(x, y);
8573        }
8574        return super.showContextMenu(x, y);
8575    }
8576
8577    /**
8578     * @return True iff this TextView contains a text that can be edited, or if this is
8579     * a selectable TextView.
8580     */
8581    boolean isTextEditable() {
8582        return mText instanceof Editable && onCheckIsTextEditor() && isEnabled();
8583    }
8584
8585    /**
8586     * Returns true, only while processing a touch gesture, if the initial
8587     * touch down event caused focus to move to the text view and as a result
8588     * its selection changed.  Only valid while processing the touch gesture
8589     * of interest, in an editable text view.
8590     */
8591    public boolean didTouchFocusSelect() {
8592        return mEditor != null && mEditor.mTouchFocusSelected;
8593    }
8594
8595    @Override
8596    public void cancelLongPress() {
8597        super.cancelLongPress();
8598        if (mEditor != null) mEditor.mIgnoreActionUpEvent = true;
8599    }
8600
8601    @Override
8602    public boolean onTrackballEvent(MotionEvent event) {
8603        if (mMovement != null && mText instanceof Spannable && mLayout != null) {
8604            if (mMovement.onTrackballEvent(this, (Spannable) mText, event)) {
8605                return true;
8606            }
8607        }
8608
8609        return super.onTrackballEvent(event);
8610    }
8611
8612    public void setScroller(Scroller s) {
8613        mScroller = s;
8614    }
8615
8616    @Override
8617    protected float getLeftFadingEdgeStrength() {
8618        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
8619                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
8620            if (mMarquee != null && !mMarquee.isStopped()) {
8621                final Marquee marquee = mMarquee;
8622                if (marquee.shouldDrawLeftFade()) {
8623                    final float scroll = marquee.getScroll();
8624                    return scroll / getHorizontalFadingEdgeLength();
8625                } else {
8626                    return 0.0f;
8627                }
8628            } else if (getLineCount() == 1) {
8629                final int layoutDirection = getLayoutDirection();
8630                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8631                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8632                    case Gravity.LEFT:
8633                        return 0.0f;
8634                    case Gravity.RIGHT:
8635                        return (mLayout.getLineRight(0) - (mRight - mLeft) -
8636                                getCompoundPaddingLeft() - getCompoundPaddingRight() -
8637                                mLayout.getLineLeft(0)) / getHorizontalFadingEdgeLength();
8638                    case Gravity.CENTER_HORIZONTAL:
8639                    case Gravity.FILL_HORIZONTAL:
8640                        final int textDirection = mLayout.getParagraphDirection(0);
8641                        if (textDirection == Layout.DIR_LEFT_TO_RIGHT) {
8642                            return 0.0f;
8643                        } else {
8644                            return (mLayout.getLineRight(0) - (mRight - mLeft) -
8645                                getCompoundPaddingLeft() - getCompoundPaddingRight() -
8646                                mLayout.getLineLeft(0)) / getHorizontalFadingEdgeLength();
8647                        }
8648                }
8649            }
8650        }
8651        return super.getLeftFadingEdgeStrength();
8652    }
8653
8654    @Override
8655    protected float getRightFadingEdgeStrength() {
8656        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
8657                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
8658            if (mMarquee != null && !mMarquee.isStopped()) {
8659                final Marquee marquee = mMarquee;
8660                final float maxFadeScroll = marquee.getMaxFadeScroll();
8661                final float scroll = marquee.getScroll();
8662                return (maxFadeScroll - scroll) / getHorizontalFadingEdgeLength();
8663            } else if (getLineCount() == 1) {
8664                final int layoutDirection = getLayoutDirection();
8665                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8666                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8667                    case Gravity.LEFT:
8668                        final int textWidth = (mRight - mLeft) - getCompoundPaddingLeft() -
8669                                getCompoundPaddingRight();
8670                        final float lineWidth = mLayout.getLineWidth(0);
8671                        return (lineWidth - textWidth) / getHorizontalFadingEdgeLength();
8672                    case Gravity.RIGHT:
8673                        return 0.0f;
8674                    case Gravity.CENTER_HORIZONTAL:
8675                    case Gravity.FILL_HORIZONTAL:
8676                        final int textDirection = mLayout.getParagraphDirection(0);
8677                        if (textDirection == Layout.DIR_RIGHT_TO_LEFT) {
8678                            return 0.0f;
8679                        } else {
8680                            return (mLayout.getLineWidth(0) - ((mRight - mLeft) -
8681                                getCompoundPaddingLeft() - getCompoundPaddingRight())) /
8682                                getHorizontalFadingEdgeLength();
8683                        }
8684                }
8685            }
8686        }
8687        return super.getRightFadingEdgeStrength();
8688    }
8689
8690    @Override
8691    protected int computeHorizontalScrollRange() {
8692        if (mLayout != null) {
8693            return mSingleLine && (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) == Gravity.LEFT ?
8694                    (int) mLayout.getLineWidth(0) : mLayout.getWidth();
8695        }
8696
8697        return super.computeHorizontalScrollRange();
8698    }
8699
8700    @Override
8701    protected int computeVerticalScrollRange() {
8702        if (mLayout != null)
8703            return mLayout.getHeight();
8704
8705        return super.computeVerticalScrollRange();
8706    }
8707
8708    @Override
8709    protected int computeVerticalScrollExtent() {
8710        return getHeight() - getCompoundPaddingTop() - getCompoundPaddingBottom();
8711    }
8712
8713    @Override
8714    public void findViewsWithText(ArrayList<View> outViews, CharSequence searched, int flags) {
8715        super.findViewsWithText(outViews, searched, flags);
8716        if (!outViews.contains(this) && (flags & FIND_VIEWS_WITH_TEXT) != 0
8717                && !TextUtils.isEmpty(searched) && !TextUtils.isEmpty(mText)) {
8718            String searchedLowerCase = searched.toString().toLowerCase();
8719            String textLowerCase = mText.toString().toLowerCase();
8720            if (textLowerCase.contains(searchedLowerCase)) {
8721                outViews.add(this);
8722            }
8723        }
8724    }
8725
8726    public enum BufferType {
8727        NORMAL, SPANNABLE, EDITABLE,
8728    }
8729
8730    /**
8731     * Returns the TextView_textColor attribute from the TypedArray, if set, or
8732     * the TextAppearance_textColor from the TextView_textAppearance attribute,
8733     * if TextView_textColor was not set directly.
8734     *
8735     * @removed
8736     */
8737    public static ColorStateList getTextColors(Context context, TypedArray attrs) {
8738        if (attrs == null) {
8739            // Preserve behavior prior to removal of this API.
8740            throw new NullPointerException();
8741        }
8742
8743        // It's not safe to use this method from apps. The parameter 'attrs'
8744        // must have been obtained using the TextView filter array which is not
8745        // available to the SDK. As such, we grab a default TypedArray with the
8746        // right filter instead here.
8747        final TypedArray a = context.obtainStyledAttributes(R.styleable.TextView);
8748        ColorStateList colors = a.getColorStateList(R.styleable.TextView_textColor);
8749        if (colors == null) {
8750            final int ap = a.getResourceId(R.styleable.TextView_textAppearance, 0);
8751            if (ap != 0) {
8752                final TypedArray appearance = context.obtainStyledAttributes(
8753                        ap, R.styleable.TextAppearance);
8754                colors = appearance.getColorStateList(R.styleable.TextAppearance_textColor);
8755                appearance.recycle();
8756            }
8757        }
8758        a.recycle();
8759
8760        return colors;
8761    }
8762
8763    /**
8764     * Returns the default color from the TextView_textColor attribute from the
8765     * AttributeSet, if set, or the default color from the
8766     * TextAppearance_textColor from the TextView_textAppearance attribute, if
8767     * TextView_textColor was not set directly.
8768     *
8769     * @removed
8770     */
8771    public static int getTextColor(Context context, TypedArray attrs, int def) {
8772        final ColorStateList colors = getTextColors(context, attrs);
8773        if (colors == null) {
8774            return def;
8775        } else {
8776            return colors.getDefaultColor();
8777        }
8778    }
8779
8780    @Override
8781    public boolean onKeyShortcut(int keyCode, KeyEvent event) {
8782        if (event.hasModifiers(KeyEvent.META_CTRL_ON)) {
8783            // Handle Ctrl-only shortcuts.
8784            switch (keyCode) {
8785            case KeyEvent.KEYCODE_A:
8786                if (canSelectText()) {
8787                    return onTextContextMenuItem(ID_SELECT_ALL);
8788                }
8789                break;
8790            case KeyEvent.KEYCODE_Z:
8791                if (canUndo()) {
8792                    return onTextContextMenuItem(ID_UNDO);
8793                }
8794                break;
8795            case KeyEvent.KEYCODE_X:
8796                if (canCut()) {
8797                    return onTextContextMenuItem(ID_CUT);
8798                }
8799                break;
8800            case KeyEvent.KEYCODE_C:
8801                if (canCopy()) {
8802                    return onTextContextMenuItem(ID_COPY);
8803                }
8804                break;
8805            case KeyEvent.KEYCODE_V:
8806                if (canPaste()) {
8807                    return onTextContextMenuItem(ID_PASTE);
8808                }
8809                break;
8810            }
8811        } else if (event.hasModifiers(KeyEvent.META_CTRL_ON | KeyEvent.META_SHIFT_ON)) {
8812            // Handle Ctrl-Shift shortcuts.
8813            switch (keyCode) {
8814                case KeyEvent.KEYCODE_Z:
8815                    if (canRedo()) {
8816                        return onTextContextMenuItem(ID_REDO);
8817                    }
8818                    break;
8819                case KeyEvent.KEYCODE_V:
8820                    if (canPaste()) {
8821                        return onTextContextMenuItem(ID_PASTE_AS_PLAIN_TEXT);
8822                    }
8823            }
8824        }
8825        return super.onKeyShortcut(keyCode, event);
8826    }
8827
8828    /**
8829     * Unlike {@link #textCanBeSelected()}, this method is based on the <i>current</i> state of the
8830     * TextView. {@link #textCanBeSelected()} has to be true (this is one of the conditions to have
8831     * a selection controller (see {@link Editor#prepareCursorControllers()}), but this is not
8832     * sufficient.
8833     */
8834    boolean canSelectText() {
8835        return mText.length() != 0 && mEditor != null && mEditor.hasSelectionController();
8836    }
8837
8838    /**
8839     * Test based on the <i>intrinsic</i> charateristics of the TextView.
8840     * The text must be spannable and the movement method must allow for arbitary selection.
8841     *
8842     * See also {@link #canSelectText()}.
8843     */
8844    boolean textCanBeSelected() {
8845        // prepareCursorController() relies on this method.
8846        // If you change this condition, make sure prepareCursorController is called anywhere
8847        // the value of this condition might be changed.
8848        if (mMovement == null || !mMovement.canSelectArbitrarily()) return false;
8849        return isTextEditable() ||
8850                (isTextSelectable() && mText instanceof Spannable && isEnabled());
8851    }
8852
8853    private Locale getTextServicesLocale(boolean allowNullLocale) {
8854        // Start fetching the text services locale asynchronously.
8855        updateTextServicesLocaleAsync();
8856        // If !allowNullLocale and there is no cached text services locale, just return the default
8857        // locale.
8858        return (mCurrentSpellCheckerLocaleCache == null && !allowNullLocale) ? Locale.getDefault()
8859                : mCurrentSpellCheckerLocaleCache;
8860    }
8861
8862    /**
8863     * This is a temporary method. Future versions may support multi-locale text.
8864     * Caveat: This method may not return the latest text services locale, but this should be
8865     * acceptable and it's more important to make this method asynchronous.
8866     *
8867     * @return The locale that should be used for a word iterator
8868     * in this TextView, based on the current spell checker settings,
8869     * the current IME's locale, or the system default locale.
8870     * Please note that a word iterator in this TextView is different from another word iterator
8871     * used by SpellChecker.java of TextView. This method should be used for the former.
8872     * @hide
8873     */
8874    // TODO: Support multi-locale
8875    // TODO: Update the text services locale immediately after the keyboard locale is switched
8876    // by catching intent of keyboard switch event
8877    public Locale getTextServicesLocale() {
8878        return getTextServicesLocale(false /* allowNullLocale */);
8879    }
8880
8881    /**
8882     * @return true if this TextView is specialized for showing and interacting with the extracted
8883     * text in a full-screen input method.
8884     * @hide
8885     */
8886    public boolean isInExtractedMode() {
8887        return false;
8888    }
8889
8890    /**
8891     * This is a temporary method. Future versions may support multi-locale text.
8892     * Caveat: This method may not return the latest spell checker locale, but this should be
8893     * acceptable and it's more important to make this method asynchronous.
8894     *
8895     * @return The locale that should be used for a spell checker in this TextView,
8896     * based on the current spell checker settings, the current IME's locale, or the system default
8897     * locale.
8898     * @hide
8899     */
8900    public Locale getSpellCheckerLocale() {
8901        return getTextServicesLocale(true /* allowNullLocale */);
8902    }
8903
8904    private void updateTextServicesLocaleAsync() {
8905        // AsyncTask.execute() uses a serial executor which means we don't have
8906        // to lock around updateTextServicesLocaleLocked() to prevent it from
8907        // being executed n times in parallel.
8908        AsyncTask.execute(new Runnable() {
8909            @Override
8910            public void run() {
8911                updateTextServicesLocaleLocked();
8912            }
8913        });
8914    }
8915
8916    private void updateTextServicesLocaleLocked() {
8917        final TextServicesManager textServicesManager = (TextServicesManager)
8918                mContext.getSystemService(Context.TEXT_SERVICES_MANAGER_SERVICE);
8919        final SpellCheckerSubtype subtype = textServicesManager.getCurrentSpellCheckerSubtype(true);
8920        final Locale locale;
8921        if (subtype != null) {
8922            locale = subtype.getLocaleObject();
8923        } else {
8924            locale = null;
8925        }
8926        mCurrentSpellCheckerLocaleCache = locale;
8927    }
8928
8929    void onLocaleChanged() {
8930        // Will be re-created on demand in getWordIterator with the proper new locale
8931        mEditor.mWordIterator = null;
8932    }
8933
8934    /**
8935     * This method is used by the ArrowKeyMovementMethod to jump from one word to the other.
8936     * Made available to achieve a consistent behavior.
8937     * @hide
8938     */
8939    public WordIterator getWordIterator() {
8940        if (mEditor != null) {
8941            return mEditor.getWordIterator();
8942        } else {
8943            return null;
8944        }
8945    }
8946
8947    /** @hide */
8948    @Override
8949    public void onPopulateAccessibilityEventInternal(AccessibilityEvent event) {
8950        super.onPopulateAccessibilityEventInternal(event);
8951
8952        final CharSequence text = getTextForAccessibility();
8953        if (!TextUtils.isEmpty(text)) {
8954            event.getText().add(text);
8955        }
8956    }
8957
8958    /**
8959     * @return true if the user has explicitly allowed accessibility services
8960     * to speak passwords.
8961     */
8962    private boolean shouldSpeakPasswordsForAccessibility() {
8963        return (Settings.Secure.getIntForUser(mContext.getContentResolver(),
8964                Settings.Secure.ACCESSIBILITY_SPEAK_PASSWORD, 0,
8965                UserHandle.USER_CURRENT_OR_SELF) == 1);
8966    }
8967
8968    @Override
8969    public CharSequence getAccessibilityClassName() {
8970        return TextView.class.getName();
8971    }
8972
8973    @Override
8974    public void onProvideStructure(ViewStructure structure) {
8975        super.onProvideStructure(structure);
8976        final boolean isPassword = hasPasswordTransformationMethod()
8977                || isPasswordInputType(getInputType());
8978        if (!isPassword) {
8979            if (mLayout == null) {
8980                assumeLayout();
8981            }
8982            Layout layout = mLayout;
8983            final int lineCount = layout.getLineCount();
8984            if (lineCount <= 1) {
8985                // Simple case: this is a single line.
8986                structure.setText(getText(), getSelectionStart(), getSelectionEnd());
8987            } else {
8988                // Complex case: multi-line, could be scrolled or within a scroll container
8989                // so some lines are not visible.
8990                final int[] tmpCords = new int[2];
8991                getLocationInWindow(tmpCords);
8992                final int topWindowLocation = tmpCords[1];
8993                View root = this;
8994                ViewParent viewParent = getParent();
8995                while (viewParent instanceof View) {
8996                    root = (View) viewParent;
8997                    viewParent = root.getParent();
8998                }
8999                final int windowHeight = root.getHeight();
9000                final int topLine;
9001                final int bottomLine;
9002                if (topWindowLocation >= 0) {
9003                    // The top of the view is fully within its window; start text at line 0.
9004                    topLine = getLineAtCoordinateUnclamped(0);
9005                    bottomLine = getLineAtCoordinateUnclamped(windowHeight-1);
9006                } else {
9007                    // The top of hte window has scrolled off the top of the window; figure out
9008                    // the starting line for this.
9009                    topLine = getLineAtCoordinateUnclamped(-topWindowLocation);
9010                    bottomLine = getLineAtCoordinateUnclamped(windowHeight-1-topWindowLocation);
9011                }
9012                // We want to return some contextual lines above/below the lines that are
9013                // actually visible.
9014                int expandedTopLine = topLine - (bottomLine-topLine)/2;
9015                if (expandedTopLine < 0) {
9016                    expandedTopLine = 0;
9017                }
9018                int expandedBottomLine = bottomLine + (bottomLine-topLine)/2;
9019                if (expandedBottomLine >= lineCount) {
9020                    expandedBottomLine = lineCount-1;
9021                }
9022                // Convert lines into character offsets.
9023                int expandedTopChar = layout.getLineStart(expandedTopLine);
9024                int expandedBottomChar = layout.getLineEnd(expandedBottomLine);
9025                // Take into account selection -- if there is a selection, we need to expand
9026                // the text we are returning to include that selection.
9027                final int selStart = getSelectionStart();
9028                final int selEnd = getSelectionEnd();
9029                if (selStart < selEnd) {
9030                    if (selStart < expandedTopChar) {
9031                        expandedTopChar = selStart;
9032                    }
9033                    if (selEnd > expandedBottomChar) {
9034                        expandedBottomChar = selEnd;
9035                    }
9036                }
9037                // Get the text and trim it to the range we are reporting.
9038                CharSequence text = getText();
9039                if (expandedTopChar > 0 || expandedBottomChar < text.length()) {
9040                    text = text.subSequence(expandedTopChar, expandedBottomChar);
9041                }
9042                structure.setText(text, selStart-expandedTopChar, selEnd-expandedTopChar);
9043                final int[] lineOffsets = new int[bottomLine-topLine+1];
9044                final int[] lineBaselines = new int[bottomLine-topLine+1];
9045                final int baselineOffset = getBaselineOffset();
9046                for (int i=topLine; i<=bottomLine; i++) {
9047                    lineOffsets[i-topLine] = layout.getLineStart(i);
9048                    lineBaselines[i-topLine] = layout.getLineBaseline(i) + baselineOffset;
9049                }
9050                structure.setTextLines(lineOffsets, lineBaselines);
9051            }
9052
9053            // Extract style information that applies to the TextView as a whole.
9054            int style = 0;
9055            int typefaceStyle = getTypefaceStyle();
9056            if ((typefaceStyle & Typeface.BOLD) != 0) {
9057                style |= AssistStructure.ViewNode.TEXT_STYLE_BOLD;
9058            }
9059            if ((typefaceStyle & Typeface.ITALIC) != 0) {
9060                style |= AssistStructure.ViewNode.TEXT_STYLE_ITALIC;
9061            }
9062
9063            // Global styles can also be set via TextView.setPaintFlags().
9064            int paintFlags = mTextPaint.getFlags();
9065            if ((paintFlags & Paint.FAKE_BOLD_TEXT_FLAG) != 0) {
9066                style |= AssistStructure.ViewNode.TEXT_STYLE_BOLD;
9067            }
9068            if ((paintFlags & Paint.UNDERLINE_TEXT_FLAG) != 0) {
9069                style |= AssistStructure.ViewNode.TEXT_STYLE_UNDERLINE;
9070            }
9071            if ((paintFlags & Paint.STRIKE_THRU_TEXT_FLAG) != 0) {
9072                style |= AssistStructure.ViewNode.TEXT_STYLE_STRIKE_THRU;
9073            }
9074
9075            // TextView does not have its own text background color. A background is either part
9076            // of the View (and can be any drawable) or a BackgroundColorSpan inside the text.
9077            structure.setTextStyle(getTextSize(), getCurrentTextColor(),
9078                    AssistStructure.ViewNode.TEXT_COLOR_UNDEFINED /* bgColor */, style);
9079        }
9080        structure.setHint(getHint());
9081    }
9082
9083    /** @hide */
9084    @Override
9085    public void onInitializeAccessibilityEventInternal(AccessibilityEvent event) {
9086        super.onInitializeAccessibilityEventInternal(event);
9087
9088        final boolean isPassword = hasPasswordTransformationMethod();
9089        event.setPassword(isPassword);
9090
9091        if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED) {
9092            event.setFromIndex(Selection.getSelectionStart(mText));
9093            event.setToIndex(Selection.getSelectionEnd(mText));
9094            event.setItemCount(mText.length());
9095        }
9096    }
9097
9098    /** @hide */
9099    @Override
9100    public void onInitializeAccessibilityNodeInfoInternal(AccessibilityNodeInfo info) {
9101        super.onInitializeAccessibilityNodeInfoInternal(info);
9102
9103        final boolean isPassword = hasPasswordTransformationMethod();
9104        info.setPassword(isPassword);
9105        info.setText(getTextForAccessibility());
9106
9107        if (mBufferType == BufferType.EDITABLE) {
9108            info.setEditable(true);
9109        }
9110
9111        if (mEditor != null) {
9112            info.setInputType(mEditor.mInputType);
9113
9114            if (mEditor.mError != null) {
9115                info.setContentInvalid(true);
9116                info.setError(mEditor.mError);
9117            }
9118        }
9119
9120        if (!TextUtils.isEmpty(mText)) {
9121            info.addAction(AccessibilityNodeInfo.ACTION_NEXT_AT_MOVEMENT_GRANULARITY);
9122            info.addAction(AccessibilityNodeInfo.ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY);
9123            info.setMovementGranularities(AccessibilityNodeInfo.MOVEMENT_GRANULARITY_CHARACTER
9124                    | AccessibilityNodeInfo.MOVEMENT_GRANULARITY_WORD
9125                    | AccessibilityNodeInfo.MOVEMENT_GRANULARITY_LINE
9126                    | AccessibilityNodeInfo.MOVEMENT_GRANULARITY_PARAGRAPH
9127                    | AccessibilityNodeInfo.MOVEMENT_GRANULARITY_PAGE);
9128            info.addAction(AccessibilityNodeInfo.ACTION_SET_SELECTION);
9129        }
9130
9131        if (isFocused()) {
9132            if (canCopy()) {
9133                info.addAction(AccessibilityNodeInfo.ACTION_COPY);
9134            }
9135            if (canPaste()) {
9136                info.addAction(AccessibilityNodeInfo.ACTION_PASTE);
9137            }
9138            if (canCut()) {
9139                info.addAction(AccessibilityNodeInfo.ACTION_CUT);
9140            }
9141            if (canShare()) {
9142                info.addAction(new AccessibilityNodeInfo.AccessibilityAction(
9143                        ACCESSIBILITY_ACTION_SHARE,
9144                        getResources().getString(com.android.internal.R.string.share)));
9145            }
9146            if (canProcessText()) {  // also implies mEditor is not null.
9147                mEditor.mProcessTextIntentActionsHandler.onInitializeAccessibilityNodeInfo(info);
9148            }
9149        }
9150
9151        // Check for known input filter types.
9152        final int numFilters = mFilters.length;
9153        for (int i = 0; i < numFilters; i++) {
9154            final InputFilter filter = mFilters[i];
9155            if (filter instanceof InputFilter.LengthFilter) {
9156                info.setMaxTextLength(((InputFilter.LengthFilter) filter).getMax());
9157            }
9158        }
9159
9160        if (!isSingleLine()) {
9161            info.setMultiLine(true);
9162        }
9163    }
9164
9165    /**
9166     * Performs an accessibility action after it has been offered to the
9167     * delegate.
9168     *
9169     * @hide
9170     */
9171    @Override
9172    public boolean performAccessibilityActionInternal(int action, Bundle arguments) {
9173        if (mEditor != null
9174                && mEditor.mProcessTextIntentActionsHandler.performAccessibilityAction(action)) {
9175            return true;
9176        }
9177        switch (action) {
9178            case AccessibilityNodeInfo.ACTION_CLICK: {
9179                return performAccessibilityActionClick(arguments);
9180            }
9181            case AccessibilityNodeInfo.ACTION_COPY: {
9182                if (isFocused() && canCopy()) {
9183                    if (onTextContextMenuItem(ID_COPY)) {
9184                        return true;
9185                    }
9186                }
9187            } return false;
9188            case AccessibilityNodeInfo.ACTION_PASTE: {
9189                if (isFocused() && canPaste()) {
9190                    if (onTextContextMenuItem(ID_PASTE)) {
9191                        return true;
9192                    }
9193                }
9194            } return false;
9195            case AccessibilityNodeInfo.ACTION_CUT: {
9196                if (isFocused() && canCut()) {
9197                    if (onTextContextMenuItem(ID_CUT)) {
9198                        return true;
9199                    }
9200                }
9201            } return false;
9202            case AccessibilityNodeInfo.ACTION_SET_SELECTION: {
9203                ensureIterableTextForAccessibilitySelectable();
9204                CharSequence text = getIterableTextForAccessibility();
9205                if (text == null) {
9206                    return false;
9207                }
9208                final int start = (arguments != null) ? arguments.getInt(
9209                        AccessibilityNodeInfo.ACTION_ARGUMENT_SELECTION_START_INT, -1) : -1;
9210                final int end = (arguments != null) ? arguments.getInt(
9211                        AccessibilityNodeInfo.ACTION_ARGUMENT_SELECTION_END_INT, -1) : -1;
9212                if ((getSelectionStart() != start || getSelectionEnd() != end)) {
9213                    // No arguments clears the selection.
9214                    if (start == end && end == -1) {
9215                        Selection.removeSelection((Spannable) text);
9216                        return true;
9217                    }
9218                    if (start >= 0 && start <= end && end <= text.length()) {
9219                        Selection.setSelection((Spannable) text, start, end);
9220                        // Make sure selection mode is engaged.
9221                        if (mEditor != null) {
9222                            mEditor.startSelectionActionMode();
9223                        }
9224                        return true;
9225                    }
9226                }
9227            } return false;
9228            case AccessibilityNodeInfo.ACTION_NEXT_AT_MOVEMENT_GRANULARITY:
9229            case AccessibilityNodeInfo.ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY: {
9230                ensureIterableTextForAccessibilitySelectable();
9231                return super.performAccessibilityActionInternal(action, arguments);
9232            }
9233            case ACCESSIBILITY_ACTION_SHARE: {
9234                if (isFocused() && canShare()) {
9235                    if (onTextContextMenuItem(ID_SHARE)) {
9236                        return true;
9237                    }
9238                }
9239            } return false;
9240            default: {
9241                return super.performAccessibilityActionInternal(action, arguments);
9242            }
9243        }
9244    }
9245
9246    private boolean performAccessibilityActionClick(Bundle arguments) {
9247        boolean handled = false;
9248        boolean processed = false;
9249
9250        if (!isEnabled()) {
9251            return false;
9252        }
9253
9254        if (arguments != null && arguments.containsKey(
9255                AccessibilityNodeInfo.ACTION_ARGUMENT_CLICK_SPAN_INDEX_INT)) {
9256            int spanIndex = arguments.getInt(
9257                    AccessibilityNodeInfo.ACTION_ARGUMENT_CLICK_SPAN_INDEX_INT, -1);
9258            if (spanIndex >= 0 && hasSpannableText()) {
9259                ClickableSpan[] spans = ((Spannable) mText).getSpans(0,
9260                        mText.length(), ClickableSpan.class);
9261                if (spans != null && spans.length > spanIndex && spans[spanIndex] != null) {
9262                    // Simulate View.onTouchEvent for an ACTION_UP event
9263                    if (isFocusable() && !isFocused()) {
9264                        requestFocus();
9265                    }
9266                    spans[spanIndex].onClick(this);
9267                    handled = true;
9268                }
9269            }
9270            processed = true;
9271        }
9272
9273        if (!processed && arguments != null &&  arguments.containsKey(
9274                AccessibilityNodeInfo.ACTION_ARGUMENT_CLICK_CHARACTER_INDEX_INT)) {
9275            int characterIndex = arguments.getInt(
9276                    AccessibilityNodeInfo.ACTION_ARGUMENT_CLICK_CHARACTER_INDEX_INT, -1);
9277            if (characterIndex >= 0 && hasSpannableText()) {
9278                ClickableSpan[] spans = ((Spannable) mText).getSpans(characterIndex,
9279                        characterIndex, ClickableSpan.class);
9280                // click only on the first span to keep parity with onTouch() implementation
9281                if (spans != null && spans.length > 0 && spans[0] != null) {
9282                    // Simulate View.onTouchEvent for an ACTION_UP event
9283                    if (isFocusable() && !isFocused()) {
9284                        requestFocus();
9285                    }
9286                    spans[0].onClick(this);
9287                    handled = true;
9288                }
9289            }
9290            processed = true;
9291        }
9292
9293        if (!processed && (isClickable() || isLongClickable())) {
9294            // Simulate View.onTouchEvent for an ACTION_UP event
9295            if (isFocusable() && !isFocused()) {
9296                requestFocus();
9297            }
9298
9299            performClick();
9300            handled = true;
9301        }
9302
9303        // Show the IME, except when selecting in read-only text.
9304        if ((mMovement != null || onCheckIsTextEditor()) && hasSpannableText() && mLayout != null
9305                && (isTextEditable() || isTextSelectable()) && isFocused()) {
9306            final InputMethodManager imm = InputMethodManager.peekInstance();
9307            viewClicked(imm);
9308            if (!isTextSelectable() && mEditor.mShowSoftInputOnFocus && imm != null) {
9309                handled |= imm.showSoftInput(this, 0);
9310            }
9311        }
9312
9313        return handled;
9314    }
9315
9316    private boolean hasSpannableText() {
9317        return mText != null && mText instanceof Spannable;
9318    }
9319
9320    /** @hide */
9321    @Override
9322    public void sendAccessibilityEventInternal(int eventType) {
9323        if (eventType == AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED && mEditor != null) {
9324            mEditor.mProcessTextIntentActionsHandler.initializeAccessibilityActions();
9325        }
9326
9327        // Do not send scroll events since first they are not interesting for
9328        // accessibility and second such events a generated too frequently.
9329        // For details see the implementation of bringTextIntoView().
9330        if (eventType == AccessibilityEvent.TYPE_VIEW_SCROLLED) {
9331            return;
9332        }
9333        super.sendAccessibilityEventInternal(eventType);
9334    }
9335
9336    /**
9337     * Returns the text that should be exposed to accessibility services.
9338     * <p>
9339     * This approximates what is displayed visually. If the user has specified
9340     * that accessibility services should speak passwords, this method will
9341     * bypass any password transformation method and return unobscured text.
9342     *
9343     * @return the text that should be exposed to accessibility services, may
9344     *         be {@code null} if no text is set
9345     */
9346    @Nullable
9347    private CharSequence getTextForAccessibility() {
9348        // If the text is empty, we must be showing the hint text.
9349        if (TextUtils.isEmpty(mText)) {
9350            return mHint;
9351        }
9352
9353        // Check whether we need to bypass the transformation
9354        // method and expose unobscured text.
9355        if (hasPasswordTransformationMethod() && shouldSpeakPasswordsForAccessibility()) {
9356            return mText;
9357        }
9358
9359        // Otherwise, speak whatever text is being displayed.
9360        return mTransformed;
9361    }
9362
9363    void sendAccessibilityEventTypeViewTextChanged(CharSequence beforeText,
9364            int fromIndex, int removedCount, int addedCount) {
9365        AccessibilityEvent event =
9366                AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
9367        event.setFromIndex(fromIndex);
9368        event.setRemovedCount(removedCount);
9369        event.setAddedCount(addedCount);
9370        event.setBeforeText(beforeText);
9371        sendAccessibilityEventUnchecked(event);
9372    }
9373
9374    /**
9375     * Returns whether this text view is a current input method target.  The
9376     * default implementation just checks with {@link InputMethodManager}.
9377     */
9378    public boolean isInputMethodTarget() {
9379        InputMethodManager imm = InputMethodManager.peekInstance();
9380        return imm != null && imm.isActive(this);
9381    }
9382
9383    static final int ID_SELECT_ALL = android.R.id.selectAll;
9384    static final int ID_UNDO = android.R.id.undo;
9385    static final int ID_REDO = android.R.id.redo;
9386    static final int ID_CUT = android.R.id.cut;
9387    static final int ID_COPY = android.R.id.copy;
9388    static final int ID_PASTE = android.R.id.paste;
9389    static final int ID_SHARE = android.R.id.shareText;
9390    static final int ID_PASTE_AS_PLAIN_TEXT = android.R.id.pasteAsPlainText;
9391    static final int ID_REPLACE = android.R.id.replaceText;
9392
9393    /**
9394     * Called when a context menu option for the text view is selected.  Currently
9395     * this will be one of {@link android.R.id#selectAll}, {@link android.R.id#cut},
9396     * {@link android.R.id#copy}, {@link android.R.id#paste} or {@link android.R.id#shareText}.
9397     *
9398     * @return true if the context menu item action was performed.
9399     */
9400    public boolean onTextContextMenuItem(int id) {
9401        int min = 0;
9402        int max = mText.length();
9403
9404        if (isFocused()) {
9405            final int selStart = getSelectionStart();
9406            final int selEnd = getSelectionEnd();
9407
9408            min = Math.max(0, Math.min(selStart, selEnd));
9409            max = Math.max(0, Math.max(selStart, selEnd));
9410        }
9411
9412        switch (id) {
9413            case ID_SELECT_ALL:
9414                // This starts an action mode if triggered from another action mode. Text is
9415                // highlighted, so that it can be bulk edited, like selectAllOnFocus does. Returns
9416                // true even if text is empty.
9417                boolean shouldRestartActionMode =
9418                        mEditor != null && mEditor.mTextActionMode != null;
9419                stopTextActionMode();
9420                selectAllText();
9421                if (shouldRestartActionMode) {
9422                    mEditor.startSelectionActionMode();
9423                }
9424                return true;
9425
9426            case ID_UNDO:
9427                if (mEditor != null) {
9428                    mEditor.undo();
9429                }
9430                return true;  // Returns true even if nothing was undone.
9431
9432            case ID_REDO:
9433                if (mEditor != null) {
9434                    mEditor.redo();
9435                }
9436                return true;  // Returns true even if nothing was undone.
9437
9438            case ID_PASTE:
9439                paste(min, max, true /* withFormatting */);
9440                return true;
9441
9442            case ID_PASTE_AS_PLAIN_TEXT:
9443                paste(min, max, false /* withFormatting */);
9444                return true;
9445
9446            case ID_CUT:
9447                setPrimaryClip(ClipData.newPlainText(null, getTransformedText(min, max)));
9448                deleteText_internal(min, max);
9449                stopTextActionMode();
9450                return true;
9451
9452            case ID_COPY:
9453                setPrimaryClip(ClipData.newPlainText(null, getTransformedText(min, max)));
9454                stopTextActionMode();
9455                return true;
9456
9457            case ID_REPLACE:
9458                if (mEditor != null) {
9459                    mEditor.replace();
9460                }
9461                return true;
9462
9463            case ID_SHARE:
9464                shareSelectedText();
9465                return true;
9466        }
9467        return false;
9468    }
9469
9470    CharSequence getTransformedText(int start, int end) {
9471        return removeSuggestionSpans(mTransformed.subSequence(start, end));
9472    }
9473
9474    @Override
9475    public boolean performLongClick() {
9476        boolean handled = false;
9477
9478        if (mEditor != null) {
9479            mEditor.mIsBeingLongClicked = true;
9480        }
9481
9482        if (super.performLongClick()) {
9483            handled = true;
9484        }
9485
9486        if (mEditor != null) {
9487            handled |= mEditor.performLongClick(handled);
9488            mEditor.mIsBeingLongClicked = false;
9489        }
9490
9491        if (handled) {
9492            performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
9493            if (mEditor != null) mEditor.mDiscardNextActionUp = true;
9494        }
9495
9496        return handled;
9497    }
9498
9499    @Override
9500    protected void onScrollChanged(int horiz, int vert, int oldHoriz, int oldVert) {
9501        super.onScrollChanged(horiz, vert, oldHoriz, oldVert);
9502        if (mEditor != null) {
9503            mEditor.onScrollChanged();
9504        }
9505    }
9506
9507    /**
9508     * Return whether or not suggestions are enabled on this TextView. The suggestions are generated
9509     * by the IME or by the spell checker as the user types. This is done by adding
9510     * {@link SuggestionSpan}s to the text.
9511     *
9512     * When suggestions are enabled (default), this list of suggestions will be displayed when the
9513     * user asks for them on these parts of the text. This value depends on the inputType of this
9514     * TextView.
9515     *
9516     * The class of the input type must be {@link InputType#TYPE_CLASS_TEXT}.
9517     *
9518     * In addition, the type variation must be one of
9519     * {@link InputType#TYPE_TEXT_VARIATION_NORMAL},
9520     * {@link InputType#TYPE_TEXT_VARIATION_EMAIL_SUBJECT},
9521     * {@link InputType#TYPE_TEXT_VARIATION_LONG_MESSAGE},
9522     * {@link InputType#TYPE_TEXT_VARIATION_SHORT_MESSAGE} or
9523     * {@link InputType#TYPE_TEXT_VARIATION_WEB_EDIT_TEXT}.
9524     *
9525     * And finally, the {@link InputType#TYPE_TEXT_FLAG_NO_SUGGESTIONS} flag must <i>not</i> be set.
9526     *
9527     * @return true if the suggestions popup window is enabled, based on the inputType.
9528     */
9529    public boolean isSuggestionsEnabled() {
9530        if (mEditor == null) return false;
9531        if ((mEditor.mInputType & InputType.TYPE_MASK_CLASS) != InputType.TYPE_CLASS_TEXT) {
9532            return false;
9533        }
9534        if ((mEditor.mInputType & InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS) > 0) return false;
9535
9536        final int variation = mEditor.mInputType & EditorInfo.TYPE_MASK_VARIATION;
9537        return (variation == EditorInfo.TYPE_TEXT_VARIATION_NORMAL ||
9538                variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT ||
9539                variation == EditorInfo.TYPE_TEXT_VARIATION_LONG_MESSAGE ||
9540                variation == EditorInfo.TYPE_TEXT_VARIATION_SHORT_MESSAGE ||
9541                variation == EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT);
9542    }
9543
9544    /**
9545     * If provided, this ActionMode.Callback will be used to create the ActionMode when text
9546     * selection is initiated in this View.
9547     *
9548     * <p>The standard implementation populates the menu with a subset of Select All, Cut, Copy,
9549     * Paste, Replace and Share actions, depending on what this View supports.
9550     *
9551     * <p>A custom implementation can add new entries in the default menu in its
9552     * {@link android.view.ActionMode.Callback#onPrepareActionMode(ActionMode, android.view.Menu)}
9553     * method. The default actions can also be removed from the menu using
9554     * {@link android.view.Menu#removeItem(int)} and passing {@link android.R.id#selectAll},
9555     * {@link android.R.id#cut}, {@link android.R.id#copy}, {@link android.R.id#paste},
9556     * {@link android.R.id#replaceText} or {@link android.R.id#shareText} ids as parameters.
9557     *
9558     * <p>Returning false from
9559     * {@link android.view.ActionMode.Callback#onCreateActionMode(ActionMode, android.view.Menu)}
9560     * will prevent the action mode from being started.
9561     *
9562     * <p>Action click events should be handled by the custom implementation of
9563     * {@link android.view.ActionMode.Callback#onActionItemClicked(ActionMode,
9564     * android.view.MenuItem)}.
9565     *
9566     * <p>Note that text selection mode is not started when a TextView receives focus and the
9567     * {@link android.R.attr#selectAllOnFocus} flag has been set. The content is highlighted in
9568     * that case, to allow for quick replacement.
9569     */
9570    public void setCustomSelectionActionModeCallback(ActionMode.Callback actionModeCallback) {
9571        createEditorIfNeeded();
9572        mEditor.mCustomSelectionActionModeCallback = actionModeCallback;
9573    }
9574
9575    /**
9576     * Retrieves the value set in {@link #setCustomSelectionActionModeCallback}. Default is null.
9577     *
9578     * @return The current custom selection callback.
9579     */
9580    public ActionMode.Callback getCustomSelectionActionModeCallback() {
9581        return mEditor == null ? null : mEditor.mCustomSelectionActionModeCallback;
9582    }
9583
9584    /**
9585     * If provided, this ActionMode.Callback will be used to create the ActionMode when text
9586     * insertion is initiated in this View.
9587     * The standard implementation populates the menu with a subset of Select All,
9588     * Paste and Replace actions, depending on what this View supports.
9589     *
9590     * <p>A custom implementation can add new entries in the default menu in its
9591     * {@link android.view.ActionMode.Callback#onPrepareActionMode(android.view.ActionMode,
9592     * android.view.Menu)} method. The default actions can also be removed from the menu using
9593     * {@link android.view.Menu#removeItem(int)} and passing {@link android.R.id#selectAll},
9594     * {@link android.R.id#paste} or {@link android.R.id#replaceText} ids as parameters.</p>
9595     *
9596     * <p>Returning false from
9597     * {@link android.view.ActionMode.Callback#onCreateActionMode(android.view.ActionMode,
9598     * android.view.Menu)} will prevent the action mode from being started.</p>
9599     *
9600     * <p>Action click events should be handled by the custom implementation of
9601     * {@link android.view.ActionMode.Callback#onActionItemClicked(android.view.ActionMode,
9602     * android.view.MenuItem)}.</p>
9603     *
9604     * <p>Note that text insertion mode is not started when a TextView receives focus and the
9605     * {@link android.R.attr#selectAllOnFocus} flag has been set.</p>
9606     */
9607    public void setCustomInsertionActionModeCallback(ActionMode.Callback actionModeCallback) {
9608        createEditorIfNeeded();
9609        mEditor.mCustomInsertionActionModeCallback = actionModeCallback;
9610    }
9611
9612    /**
9613     * Retrieves the value set in {@link #setCustomInsertionActionModeCallback}. Default is null.
9614     *
9615     * @return The current custom insertion callback.
9616     */
9617    public ActionMode.Callback getCustomInsertionActionModeCallback() {
9618        return mEditor == null ? null : mEditor.mCustomInsertionActionModeCallback;
9619    }
9620
9621    /**
9622     * @hide
9623     */
9624    protected void stopTextActionMode() {
9625        if (mEditor != null) {
9626            mEditor.stopTextActionMode();
9627        }
9628    }
9629
9630    boolean canUndo() {
9631        return mEditor != null && mEditor.canUndo();
9632    }
9633
9634    boolean canRedo() {
9635        return mEditor != null && mEditor.canRedo();
9636    }
9637
9638    boolean canCut() {
9639        if (hasPasswordTransformationMethod()) {
9640            return false;
9641        }
9642
9643        if (mText.length() > 0 && hasSelection() && mText instanceof Editable && mEditor != null &&
9644                mEditor.mKeyListener != null) {
9645            return true;
9646        }
9647
9648        return false;
9649    }
9650
9651    boolean canCopy() {
9652        if (hasPasswordTransformationMethod()) {
9653            return false;
9654        }
9655
9656        if (mText.length() > 0 && hasSelection() && mEditor != null) {
9657            return true;
9658        }
9659
9660        return false;
9661    }
9662
9663    boolean canShare() {
9664        return canCopy() && isDeviceProvisioned();
9665    }
9666
9667    boolean isDeviceProvisioned() {
9668        if (mDeviceProvisionedState == DEVICE_PROVISIONED_UNKNOWN) {
9669            mDeviceProvisionedState = Settings.Global.getInt(
9670                    mContext.getContentResolver(), Settings.Global.DEVICE_PROVISIONED, 0) != 0
9671                    ? DEVICE_PROVISIONED_YES
9672                    : DEVICE_PROVISIONED_NO;
9673        }
9674        return mDeviceProvisionedState == DEVICE_PROVISIONED_YES;
9675    }
9676
9677    boolean canPaste() {
9678        return (mText instanceof Editable &&
9679                mEditor != null && mEditor.mKeyListener != null &&
9680                getSelectionStart() >= 0 &&
9681                getSelectionEnd() >= 0 &&
9682                ((ClipboardManager)getContext().getSystemService(Context.CLIPBOARD_SERVICE)).
9683                hasPrimaryClip());
9684    }
9685
9686    boolean canProcessText() {
9687        if (!getContext().canStartActivityForResult() || getId() == View.NO_ID
9688                || hasPasswordTransformationMethod()) {
9689            return false;
9690        }
9691
9692        if (mText.length() > 0 && hasSelection() && mEditor != null) {
9693            return true;
9694        }
9695
9696        return false;
9697    }
9698
9699    boolean canSelectAllText() {
9700        return canSelectText() && !hasPasswordTransformationMethod()
9701                && !(getSelectionStart() == 0 && getSelectionEnd() == mText.length());
9702    }
9703
9704    boolean selectAllText() {
9705        // Need to hide insert point cursor controller before settings selection, otherwise insert
9706        // point cursor controller obtains cursor update event and update cursor with cancelling
9707        // selection.
9708        if (mEditor != null) {
9709            mEditor.hideInsertionPointCursorController();
9710        }
9711        final int length = mText.length();
9712        Selection.setSelection((Spannable) mText, 0, length);
9713        return length > 0;
9714    }
9715
9716    void replaceSelectionWithText(CharSequence text) {
9717        ((Editable) mText).replace(getSelectionStart(), getSelectionEnd(), text);
9718    }
9719
9720    /**
9721     * Paste clipboard content between min and max positions.
9722     */
9723    private void paste(int min, int max, boolean withFormatting) {
9724        ClipboardManager clipboard =
9725            (ClipboardManager) getContext().getSystemService(Context.CLIPBOARD_SERVICE);
9726        ClipData clip = clipboard.getPrimaryClip();
9727        if (clip != null) {
9728            boolean didFirst = false;
9729            for (int i=0; i<clip.getItemCount(); i++) {
9730                final CharSequence paste;
9731                if (withFormatting) {
9732                    paste = clip.getItemAt(i).coerceToStyledText(getContext());
9733                } else {
9734                    // Get an item as text and remove all spans by toString().
9735                    final CharSequence text = clip.getItemAt(i).coerceToText(getContext());
9736                    paste = (text instanceof Spanned) ? text.toString() : text;
9737                }
9738                if (paste != null) {
9739                    if (!didFirst) {
9740                        Selection.setSelection((Spannable) mText, max);
9741                        ((Editable) mText).replace(min, max, paste);
9742                        didFirst = true;
9743                    } else {
9744                        ((Editable) mText).insert(getSelectionEnd(), "\n");
9745                        ((Editable) mText).insert(getSelectionEnd(), paste);
9746                    }
9747                }
9748            }
9749            stopTextActionMode();
9750            sLastCutCopyOrTextChangedTime = 0;
9751        }
9752    }
9753
9754    private void shareSelectedText() {
9755        String selectedText = getSelectedText();
9756        if (selectedText != null && !selectedText.isEmpty()) {
9757            Intent sharingIntent = new Intent(android.content.Intent.ACTION_SEND);
9758            sharingIntent.setType("text/plain");
9759            sharingIntent.removeExtra(android.content.Intent.EXTRA_TEXT);
9760            sharingIntent.putExtra(android.content.Intent.EXTRA_TEXT, selectedText);
9761            getContext().startActivity(Intent.createChooser(sharingIntent, null));
9762            stopTextActionMode();
9763        }
9764    }
9765
9766    private void setPrimaryClip(ClipData clip) {
9767        ClipboardManager clipboard = (ClipboardManager) getContext().
9768                getSystemService(Context.CLIPBOARD_SERVICE);
9769        clipboard.setPrimaryClip(clip);
9770        sLastCutCopyOrTextChangedTime = SystemClock.uptimeMillis();
9771    }
9772
9773    /**
9774     * Get the character offset closest to the specified absolute position. A typical use case is to
9775     * pass the result of {@link MotionEvent#getX()} and {@link MotionEvent#getY()} to this method.
9776     *
9777     * @param x The horizontal absolute position of a point on screen
9778     * @param y The vertical absolute position of a point on screen
9779     * @return the character offset for the character whose position is closest to the specified
9780     *  position. Returns -1 if there is no layout.
9781     */
9782    public int getOffsetForPosition(float x, float y) {
9783        if (getLayout() == null) return -1;
9784        final int line = getLineAtCoordinate(y);
9785        final int offset = getOffsetAtCoordinate(line, x);
9786        return offset;
9787    }
9788
9789    float convertToLocalHorizontalCoordinate(float x) {
9790        x -= getTotalPaddingLeft();
9791        // Clamp the position to inside of the view.
9792        x = Math.max(0.0f, x);
9793        x = Math.min(getWidth() - getTotalPaddingRight() - 1, x);
9794        x += getScrollX();
9795        return x;
9796    }
9797
9798    int getLineAtCoordinate(float y) {
9799        y -= getTotalPaddingTop();
9800        // Clamp the position to inside of the view.
9801        y = Math.max(0.0f, y);
9802        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
9803        y += getScrollY();
9804        return getLayout().getLineForVertical((int) y);
9805    }
9806
9807    int getLineAtCoordinateUnclamped(float y) {
9808        y -= getTotalPaddingTop();
9809        y += getScrollY();
9810        return getLayout().getLineForVertical((int) y);
9811    }
9812
9813    int getOffsetAtCoordinate(int line, float x) {
9814        x = convertToLocalHorizontalCoordinate(x);
9815        return getLayout().getOffsetForHorizontal(line, x);
9816    }
9817
9818    @Override
9819    public boolean onDragEvent(DragEvent event) {
9820        switch (event.getAction()) {
9821            case DragEvent.ACTION_DRAG_STARTED:
9822                return mEditor != null && mEditor.hasInsertionController();
9823
9824            case DragEvent.ACTION_DRAG_ENTERED:
9825                TextView.this.requestFocus();
9826                return true;
9827
9828            case DragEvent.ACTION_DRAG_LOCATION:
9829                final int offset = getOffsetForPosition(event.getX(), event.getY());
9830                Selection.setSelection((Spannable)mText, offset);
9831                return true;
9832
9833            case DragEvent.ACTION_DROP:
9834                if (mEditor != null) mEditor.onDrop(event);
9835                return true;
9836
9837            case DragEvent.ACTION_DRAG_ENDED:
9838            case DragEvent.ACTION_DRAG_EXITED:
9839            default:
9840                return true;
9841        }
9842    }
9843
9844    boolean isInBatchEditMode() {
9845        if (mEditor == null) return false;
9846        final Editor.InputMethodState ims = mEditor.mInputMethodState;
9847        if (ims != null) {
9848            return ims.mBatchEditNesting > 0;
9849        }
9850        return mEditor.mInBatchEditControllers;
9851    }
9852
9853    @Override
9854    public void onRtlPropertiesChanged(int layoutDirection) {
9855        super.onRtlPropertiesChanged(layoutDirection);
9856
9857        final TextDirectionHeuristic newTextDir = getTextDirectionHeuristic();
9858        if (mTextDir != newTextDir) {
9859            mTextDir = newTextDir;
9860            if (mLayout != null) {
9861                checkForRelayout();
9862            }
9863        }
9864    }
9865
9866    /**
9867     * @hide
9868     */
9869    protected TextDirectionHeuristic getTextDirectionHeuristic() {
9870        if (hasPasswordTransformationMethod()) {
9871            // passwords fields should be LTR
9872            return TextDirectionHeuristics.LTR;
9873        }
9874
9875        // Always need to resolve layout direction first
9876        final boolean defaultIsRtl = (getLayoutDirection() == LAYOUT_DIRECTION_RTL);
9877
9878        // Now, we can select the heuristic
9879        switch (getTextDirection()) {
9880            default:
9881            case TEXT_DIRECTION_FIRST_STRONG:
9882                return (defaultIsRtl ? TextDirectionHeuristics.FIRSTSTRONG_RTL :
9883                        TextDirectionHeuristics.FIRSTSTRONG_LTR);
9884            case TEXT_DIRECTION_ANY_RTL:
9885                return TextDirectionHeuristics.ANYRTL_LTR;
9886            case TEXT_DIRECTION_LTR:
9887                return TextDirectionHeuristics.LTR;
9888            case TEXT_DIRECTION_RTL:
9889                return TextDirectionHeuristics.RTL;
9890            case TEXT_DIRECTION_LOCALE:
9891                return TextDirectionHeuristics.LOCALE;
9892            case TEXT_DIRECTION_FIRST_STRONG_LTR:
9893                return TextDirectionHeuristics.FIRSTSTRONG_LTR;
9894            case TEXT_DIRECTION_FIRST_STRONG_RTL:
9895                return TextDirectionHeuristics.FIRSTSTRONG_RTL;
9896        }
9897    }
9898
9899    /**
9900     * @hide
9901     */
9902    @Override
9903    public void onResolveDrawables(int layoutDirection) {
9904        // No need to resolve twice
9905        if (mLastLayoutDirection == layoutDirection) {
9906            return;
9907        }
9908        mLastLayoutDirection = layoutDirection;
9909
9910        // Resolve drawables
9911        if (mDrawables != null) {
9912            if (mDrawables.resolveWithLayoutDirection(layoutDirection)) {
9913                prepareDrawableForDisplay(mDrawables.mShowing[Drawables.LEFT]);
9914                prepareDrawableForDisplay(mDrawables.mShowing[Drawables.RIGHT]);
9915                applyCompoundDrawableTint();
9916            }
9917        }
9918    }
9919
9920    /**
9921     * Prepares a drawable for display by propagating layout direction and
9922     * drawable state.
9923     *
9924     * @param dr the drawable to prepare
9925     */
9926    private void prepareDrawableForDisplay(@Nullable Drawable dr) {
9927        if (dr == null) {
9928            return;
9929        }
9930
9931        dr.setLayoutDirection(getLayoutDirection());
9932
9933        if (dr.isStateful()) {
9934            dr.setState(getDrawableState());
9935            dr.jumpToCurrentState();
9936        }
9937    }
9938
9939    /**
9940     * @hide
9941     */
9942    protected void resetResolvedDrawables() {
9943        super.resetResolvedDrawables();
9944        mLastLayoutDirection = -1;
9945    }
9946
9947    /**
9948     * @hide
9949     */
9950    protected void viewClicked(InputMethodManager imm) {
9951        if (imm != null) {
9952            imm.viewClicked(this);
9953        }
9954    }
9955
9956    /**
9957     * Deletes the range of text [start, end[.
9958     * @hide
9959     */
9960    protected void deleteText_internal(int start, int end) {
9961        ((Editable) mText).delete(start, end);
9962    }
9963
9964    /**
9965     * Replaces the range of text [start, end[ by replacement text
9966     * @hide
9967     */
9968    protected void replaceText_internal(int start, int end, CharSequence text) {
9969        ((Editable) mText).replace(start, end, text);
9970    }
9971
9972    /**
9973     * Sets a span on the specified range of text
9974     * @hide
9975     */
9976    protected void setSpan_internal(Object span, int start, int end, int flags) {
9977        ((Editable) mText).setSpan(span, start, end, flags);
9978    }
9979
9980    /**
9981     * Moves the cursor to the specified offset position in text
9982     * @hide
9983     */
9984    protected void setCursorPosition_internal(int start, int end) {
9985        Selection.setSelection(((Editable) mText), start, end);
9986    }
9987
9988    /**
9989     * An Editor should be created as soon as any of the editable-specific fields (grouped
9990     * inside the Editor object) is assigned to a non-default value.
9991     * This method will create the Editor if needed.
9992     *
9993     * A standard TextView (as well as buttons, checkboxes...) should not qualify and hence will
9994     * have a null Editor, unlike an EditText. Inconsistent in-between states will have an
9995     * Editor for backward compatibility, as soon as one of these fields is assigned.
9996     *
9997     * Also note that for performance reasons, the mEditor is created when needed, but not
9998     * reset when no more edit-specific fields are needed.
9999     */
10000    private void createEditorIfNeeded() {
10001        if (mEditor == null) {
10002            mEditor = new Editor(this);
10003        }
10004    }
10005
10006    /**
10007     * @hide
10008     */
10009    @Override
10010    public CharSequence getIterableTextForAccessibility() {
10011        return mText;
10012    }
10013
10014    private void ensureIterableTextForAccessibilitySelectable() {
10015        if (!(mText instanceof Spannable)) {
10016            setText(mText, BufferType.SPANNABLE);
10017        }
10018    }
10019
10020    /**
10021     * @hide
10022     */
10023    @Override
10024    public TextSegmentIterator getIteratorForGranularity(int granularity) {
10025        switch (granularity) {
10026            case AccessibilityNodeInfo.MOVEMENT_GRANULARITY_LINE: {
10027                Spannable text = (Spannable) getIterableTextForAccessibility();
10028                if (!TextUtils.isEmpty(text) && getLayout() != null) {
10029                    AccessibilityIterators.LineTextSegmentIterator iterator =
10030                        AccessibilityIterators.LineTextSegmentIterator.getInstance();
10031                    iterator.initialize(text, getLayout());
10032                    return iterator;
10033                }
10034            } break;
10035            case AccessibilityNodeInfo.MOVEMENT_GRANULARITY_PAGE: {
10036                Spannable text = (Spannable) getIterableTextForAccessibility();
10037                if (!TextUtils.isEmpty(text) && getLayout() != null) {
10038                    AccessibilityIterators.PageTextSegmentIterator iterator =
10039                        AccessibilityIterators.PageTextSegmentIterator.getInstance();
10040                    iterator.initialize(this);
10041                    return iterator;
10042                }
10043            } break;
10044        }
10045        return super.getIteratorForGranularity(granularity);
10046    }
10047
10048    /**
10049     * @hide
10050     */
10051    @Override
10052    public int getAccessibilitySelectionStart() {
10053        return getSelectionStart();
10054    }
10055
10056    /**
10057     * @hide
10058     */
10059    public boolean isAccessibilitySelectionExtendable() {
10060        return true;
10061    }
10062
10063    /**
10064     * @hide
10065     */
10066    @Override
10067    public int getAccessibilitySelectionEnd() {
10068        return getSelectionEnd();
10069    }
10070
10071    /**
10072     * @hide
10073     */
10074    @Override
10075    public void setAccessibilitySelection(int start, int end) {
10076        if (getAccessibilitySelectionStart() == start
10077                && getAccessibilitySelectionEnd() == end) {
10078            return;
10079        }
10080        // Hide all selection controllers used for adjusting selection
10081        // since we are doing so explicitlty by other means and these
10082        // controllers interact with how selection behaves.
10083        if (mEditor != null) {
10084            mEditor.hideCursorAndSpanControllers();
10085            mEditor.stopTextActionMode();
10086        }
10087        CharSequence text = getIterableTextForAccessibility();
10088        if (Math.min(start, end) >= 0 && Math.max(start, end) <= text.length()) {
10089            Selection.setSelection((Spannable) text, start, end);
10090        } else {
10091            Selection.removeSelection((Spannable) text);
10092        }
10093    }
10094
10095    /** @hide */
10096    @Override
10097    protected void encodeProperties(@NonNull ViewHierarchyEncoder stream) {
10098        super.encodeProperties(stream);
10099
10100        TruncateAt ellipsize = getEllipsize();
10101        stream.addProperty("text:ellipsize", ellipsize == null ? null : ellipsize.name());
10102        stream.addProperty("text:textSize", getTextSize());
10103        stream.addProperty("text:scaledTextSize", getScaledTextSize());
10104        stream.addProperty("text:typefaceStyle", getTypefaceStyle());
10105        stream.addProperty("text:selectionStart", getSelectionStart());
10106        stream.addProperty("text:selectionEnd", getSelectionEnd());
10107        stream.addProperty("text:curTextColor", mCurTextColor);
10108        stream.addProperty("text:text", mText == null ? null : mText.toString());
10109        stream.addProperty("text:gravity", mGravity);
10110    }
10111
10112    /**
10113     * User interface state that is stored by TextView for implementing
10114     * {@link View#onSaveInstanceState}.
10115     */
10116    public static class SavedState extends BaseSavedState {
10117        int selStart = -1;
10118        int selEnd = -1;
10119        CharSequence text;
10120        boolean frozenWithFocus;
10121        CharSequence error;
10122        ParcelableParcel editorState;  // Optional state from Editor.
10123
10124        SavedState(Parcelable superState) {
10125            super(superState);
10126        }
10127
10128        @Override
10129        public void writeToParcel(Parcel out, int flags) {
10130            super.writeToParcel(out, flags);
10131            out.writeInt(selStart);
10132            out.writeInt(selEnd);
10133            out.writeInt(frozenWithFocus ? 1 : 0);
10134            TextUtils.writeToParcel(text, out, flags);
10135
10136            if (error == null) {
10137                out.writeInt(0);
10138            } else {
10139                out.writeInt(1);
10140                TextUtils.writeToParcel(error, out, flags);
10141            }
10142
10143            if (editorState == null) {
10144                out.writeInt(0);
10145            } else {
10146                out.writeInt(1);
10147                editorState.writeToParcel(out, flags);
10148            }
10149        }
10150
10151        @Override
10152        public String toString() {
10153            String str = "TextView.SavedState{"
10154                    + Integer.toHexString(System.identityHashCode(this))
10155                    + " start=" + selStart + " end=" + selEnd;
10156            if (text != null) {
10157                str += " text=" + text;
10158            }
10159            return str + "}";
10160        }
10161
10162        @SuppressWarnings("hiding")
10163        public static final Parcelable.Creator<SavedState> CREATOR
10164                = new Parcelable.Creator<SavedState>() {
10165            public SavedState createFromParcel(Parcel in) {
10166                return new SavedState(in);
10167            }
10168
10169            public SavedState[] newArray(int size) {
10170                return new SavedState[size];
10171            }
10172        };
10173
10174        private SavedState(Parcel in) {
10175            super(in);
10176            selStart = in.readInt();
10177            selEnd = in.readInt();
10178            frozenWithFocus = (in.readInt() != 0);
10179            text = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
10180
10181            if (in.readInt() != 0) {
10182                error = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
10183            }
10184
10185            if (in.readInt() != 0) {
10186                editorState = ParcelableParcel.CREATOR.createFromParcel(in);
10187            }
10188        }
10189    }
10190
10191    private static class CharWrapper implements CharSequence, GetChars, GraphicsOperations {
10192        private char[] mChars;
10193        private int mStart, mLength;
10194
10195        public CharWrapper(char[] chars, int start, int len) {
10196            mChars = chars;
10197            mStart = start;
10198            mLength = len;
10199        }
10200
10201        /* package */ void set(char[] chars, int start, int len) {
10202            mChars = chars;
10203            mStart = start;
10204            mLength = len;
10205        }
10206
10207        public int length() {
10208            return mLength;
10209        }
10210
10211        public char charAt(int off) {
10212            return mChars[off + mStart];
10213        }
10214
10215        @Override
10216        public String toString() {
10217            return new String(mChars, mStart, mLength);
10218        }
10219
10220        public CharSequence subSequence(int start, int end) {
10221            if (start < 0 || end < 0 || start > mLength || end > mLength) {
10222                throw new IndexOutOfBoundsException(start + ", " + end);
10223            }
10224
10225            return new String(mChars, start + mStart, end - start);
10226        }
10227
10228        public void getChars(int start, int end, char[] buf, int off) {
10229            if (start < 0 || end < 0 || start > mLength || end > mLength) {
10230                throw new IndexOutOfBoundsException(start + ", " + end);
10231            }
10232
10233            System.arraycopy(mChars, start + mStart, buf, off, end - start);
10234        }
10235
10236        public void drawText(Canvas c, int start, int end,
10237                             float x, float y, Paint p) {
10238            c.drawText(mChars, start + mStart, end - start, x, y, p);
10239        }
10240
10241        public void drawTextRun(Canvas c, int start, int end,
10242                int contextStart, int contextEnd, float x, float y, boolean isRtl, Paint p) {
10243            int count = end - start;
10244            int contextCount = contextEnd - contextStart;
10245            c.drawTextRun(mChars, start + mStart, count, contextStart + mStart,
10246                    contextCount, x, y, isRtl, p);
10247        }
10248
10249        public float measureText(int start, int end, Paint p) {
10250            return p.measureText(mChars, start + mStart, end - start);
10251        }
10252
10253        public int getTextWidths(int start, int end, float[] widths, Paint p) {
10254            return p.getTextWidths(mChars, start + mStart, end - start, widths);
10255        }
10256
10257        public float getTextRunAdvances(int start, int end, int contextStart,
10258                int contextEnd, boolean isRtl, float[] advances, int advancesIndex,
10259                Paint p) {
10260            int count = end - start;
10261            int contextCount = contextEnd - contextStart;
10262            return p.getTextRunAdvances(mChars, start + mStart, count,
10263                    contextStart + mStart, contextCount, isRtl, advances,
10264                    advancesIndex);
10265        }
10266
10267        public int getTextRunCursor(int contextStart, int contextEnd, int dir,
10268                int offset, int cursorOpt, Paint p) {
10269            int contextCount = contextEnd - contextStart;
10270            return p.getTextRunCursor(mChars, contextStart + mStart,
10271                    contextCount, dir, offset + mStart, cursorOpt);
10272        }
10273    }
10274
10275    private static final class Marquee {
10276        // TODO: Add an option to configure this
10277        private static final float MARQUEE_DELTA_MAX = 0.07f;
10278        private static final int MARQUEE_DELAY = 1200;
10279        private static final int MARQUEE_DP_PER_SECOND = 30;
10280
10281        private static final byte MARQUEE_STOPPED = 0x0;
10282        private static final byte MARQUEE_STARTING = 0x1;
10283        private static final byte MARQUEE_RUNNING = 0x2;
10284
10285        private final WeakReference<TextView> mView;
10286        private final Choreographer mChoreographer;
10287
10288        private byte mStatus = MARQUEE_STOPPED;
10289        private final float mPixelsPerSecond;
10290        private float mMaxScroll;
10291        private float mMaxFadeScroll;
10292        private float mGhostStart;
10293        private float mGhostOffset;
10294        private float mFadeStop;
10295        private int mRepeatLimit;
10296
10297        private float mScroll;
10298        private long mLastAnimationMs;
10299
10300        Marquee(TextView v) {
10301            final float density = v.getContext().getResources().getDisplayMetrics().density;
10302            mPixelsPerSecond = MARQUEE_DP_PER_SECOND * density;
10303            mView = new WeakReference<TextView>(v);
10304            mChoreographer = Choreographer.getInstance();
10305        }
10306
10307        private Choreographer.FrameCallback mTickCallback = new Choreographer.FrameCallback() {
10308            @Override
10309            public void doFrame(long frameTimeNanos) {
10310                tick();
10311            }
10312        };
10313
10314        private Choreographer.FrameCallback mStartCallback = new Choreographer.FrameCallback() {
10315            @Override
10316            public void doFrame(long frameTimeNanos) {
10317                mStatus = MARQUEE_RUNNING;
10318                mLastAnimationMs = mChoreographer.getFrameTime();
10319                tick();
10320            }
10321        };
10322
10323        private Choreographer.FrameCallback mRestartCallback = new Choreographer.FrameCallback() {
10324            @Override
10325            public void doFrame(long frameTimeNanos) {
10326                if (mStatus == MARQUEE_RUNNING) {
10327                    if (mRepeatLimit >= 0) {
10328                        mRepeatLimit--;
10329                    }
10330                    start(mRepeatLimit);
10331                }
10332            }
10333        };
10334
10335        void tick() {
10336            if (mStatus != MARQUEE_RUNNING) {
10337                return;
10338            }
10339
10340            mChoreographer.removeFrameCallback(mTickCallback);
10341
10342            final TextView textView = mView.get();
10343            if (textView != null && (textView.isFocused() || textView.isSelected())) {
10344                long currentMs = mChoreographer.getFrameTime();
10345                long deltaMs = currentMs - mLastAnimationMs;
10346                mLastAnimationMs = currentMs;
10347                float deltaPx = deltaMs / 1000f * mPixelsPerSecond;
10348                mScroll += deltaPx;
10349                if (mScroll > mMaxScroll) {
10350                    mScroll = mMaxScroll;
10351                    mChoreographer.postFrameCallbackDelayed(mRestartCallback, MARQUEE_DELAY);
10352                } else {
10353                    mChoreographer.postFrameCallback(mTickCallback);
10354                }
10355                textView.invalidate();
10356            }
10357        }
10358
10359        void stop() {
10360            mStatus = MARQUEE_STOPPED;
10361            mChoreographer.removeFrameCallback(mStartCallback);
10362            mChoreographer.removeFrameCallback(mRestartCallback);
10363            mChoreographer.removeFrameCallback(mTickCallback);
10364            resetScroll();
10365        }
10366
10367        private void resetScroll() {
10368            mScroll = 0.0f;
10369            final TextView textView = mView.get();
10370            if (textView != null) textView.invalidate();
10371        }
10372
10373        void start(int repeatLimit) {
10374            if (repeatLimit == 0) {
10375                stop();
10376                return;
10377            }
10378            mRepeatLimit = repeatLimit;
10379            final TextView textView = mView.get();
10380            if (textView != null && textView.mLayout != null) {
10381                mStatus = MARQUEE_STARTING;
10382                mScroll = 0.0f;
10383                final int textWidth = textView.getWidth() - textView.getCompoundPaddingLeft() -
10384                        textView.getCompoundPaddingRight();
10385                final float lineWidth = textView.mLayout.getLineWidth(0);
10386                final float gap = textWidth / 3.0f;
10387                mGhostStart = lineWidth - textWidth + gap;
10388                mMaxScroll = mGhostStart + textWidth;
10389                mGhostOffset = lineWidth + gap;
10390                mFadeStop = lineWidth + textWidth / 6.0f;
10391                mMaxFadeScroll = mGhostStart + lineWidth + lineWidth;
10392
10393                textView.invalidate();
10394                mChoreographer.postFrameCallback(mStartCallback);
10395            }
10396        }
10397
10398        float getGhostOffset() {
10399            return mGhostOffset;
10400        }
10401
10402        float getScroll() {
10403            return mScroll;
10404        }
10405
10406        float getMaxFadeScroll() {
10407            return mMaxFadeScroll;
10408        }
10409
10410        boolean shouldDrawLeftFade() {
10411            return mScroll <= mFadeStop;
10412        }
10413
10414        boolean shouldDrawGhost() {
10415            return mStatus == MARQUEE_RUNNING && mScroll > mGhostStart;
10416        }
10417
10418        boolean isRunning() {
10419            return mStatus == MARQUEE_RUNNING;
10420        }
10421
10422        boolean isStopped() {
10423            return mStatus == MARQUEE_STOPPED;
10424        }
10425    }
10426
10427    private class ChangeWatcher implements TextWatcher, SpanWatcher {
10428
10429        private CharSequence mBeforeText;
10430
10431        public void beforeTextChanged(CharSequence buffer, int start,
10432                                      int before, int after) {
10433            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "beforeTextChanged start=" + start
10434                    + " before=" + before + " after=" + after + ": " + buffer);
10435
10436            if (AccessibilityManager.getInstance(mContext).isEnabled()
10437                    && ((!isPasswordInputType(getInputType()) && !hasPasswordTransformationMethod())
10438                            || shouldSpeakPasswordsForAccessibility())) {
10439                mBeforeText = buffer.toString();
10440            }
10441
10442            TextView.this.sendBeforeTextChanged(buffer, start, before, after);
10443        }
10444
10445        public void onTextChanged(CharSequence buffer, int start, int before, int after) {
10446            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onTextChanged start=" + start
10447                    + " before=" + before + " after=" + after + ": " + buffer);
10448            TextView.this.handleTextChanged(buffer, start, before, after);
10449
10450            if (AccessibilityManager.getInstance(mContext).isEnabled() &&
10451                    (isFocused() || isSelected() && isShown())) {
10452                sendAccessibilityEventTypeViewTextChanged(mBeforeText, start, before, after);
10453                mBeforeText = null;
10454            }
10455        }
10456
10457        public void afterTextChanged(Editable buffer) {
10458            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "afterTextChanged: " + buffer);
10459            TextView.this.sendAfterTextChanged(buffer);
10460
10461            if (MetaKeyKeyListener.getMetaState(buffer, MetaKeyKeyListener.META_SELECTING) != 0) {
10462                MetaKeyKeyListener.stopSelecting(TextView.this, buffer);
10463            }
10464        }
10465
10466        public void onSpanChanged(Spannable buf, Object what, int s, int e, int st, int en) {
10467            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanChanged s=" + s + " e=" + e
10468                    + " st=" + st + " en=" + en + " what=" + what + ": " + buf);
10469            TextView.this.spanChange(buf, what, s, st, e, en);
10470        }
10471
10472        public void onSpanAdded(Spannable buf, Object what, int s, int e) {
10473            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanAdded s=" + s + " e=" + e
10474                    + " what=" + what + ": " + buf);
10475            TextView.this.spanChange(buf, what, -1, s, -1, e);
10476        }
10477
10478        public void onSpanRemoved(Spannable buf, Object what, int s, int e) {
10479            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanRemoved s=" + s + " e=" + e
10480                    + " what=" + what + ": " + buf);
10481            TextView.this.spanChange(buf, what, s, -1, e, -1);
10482        }
10483    }
10484}
10485