TextView.java revision 7b9c912f536925ac6ec43935d6e97506851b33d6 
1/*
2 * Copyright (C) 2006 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.widget;
18
19import android.R;
20import android.annotation.DrawableRes;
21import android.annotation.NonNull;
22import android.annotation.Nullable;
23import android.annotation.StringRes;
24import android.annotation.StyleRes;
25import android.annotation.XmlRes;
26import android.content.ClipData;
27import android.content.ClipboardManager;
28import android.content.Context;
29import android.content.UndoManager;
30import android.content.res.ColorStateList;
31import android.content.res.CompatibilityInfo;
32import android.content.res.Configuration;
33import android.content.res.Resources;
34import android.content.res.TypedArray;
35import android.content.res.XmlResourceParser;
36import android.graphics.Canvas;
37import android.graphics.Insets;
38import android.graphics.Paint;
39import android.graphics.Path;
40import android.graphics.PorterDuff;
41import android.graphics.Rect;
42import android.graphics.RectF;
43import android.graphics.Typeface;
44import android.graphics.drawable.Drawable;
45import android.inputmethodservice.ExtractEditText;
46import android.os.AsyncTask;
47import android.os.Bundle;
48import android.os.Parcel;
49import android.os.Parcelable;
50import android.os.SystemClock;
51import android.os.UserHandle;
52import android.provider.Settings;
53import android.text.BoringLayout;
54import android.text.DynamicLayout;
55import android.text.Editable;
56import android.text.GetChars;
57import android.text.GraphicsOperations;
58import android.text.InputFilter;
59import android.text.InputType;
60import android.text.Layout;
61import android.text.ParcelableSpan;
62import android.text.Selection;
63import android.text.SpanWatcher;
64import android.text.Spannable;
65import android.text.SpannableString;
66import android.text.SpannableStringBuilder;
67import android.text.Spanned;
68import android.text.SpannedString;
69import android.text.StaticLayout;
70import android.text.TextDirectionHeuristic;
71import android.text.TextDirectionHeuristics;
72import android.text.TextPaint;
73import android.text.TextUtils;
74import android.text.TextUtils.TruncateAt;
75import android.text.TextWatcher;
76import android.text.method.AllCapsTransformationMethod;
77import android.text.method.ArrowKeyMovementMethod;
78import android.text.method.DateKeyListener;
79import android.text.method.DateTimeKeyListener;
80import android.text.method.DialerKeyListener;
81import android.text.method.DigitsKeyListener;
82import android.text.method.KeyListener;
83import android.text.method.LinkMovementMethod;
84import android.text.method.MetaKeyKeyListener;
85import android.text.method.MovementMethod;
86import android.text.method.PasswordTransformationMethod;
87import android.text.method.SingleLineTransformationMethod;
88import android.text.method.TextKeyListener;
89import android.text.method.TimeKeyListener;
90import android.text.method.TransformationMethod;
91import android.text.method.TransformationMethod2;
92import android.text.method.WordIterator;
93import android.text.style.CharacterStyle;
94import android.text.style.ClickableSpan;
95import android.text.style.ParagraphStyle;
96import android.text.style.SpellCheckSpan;
97import android.text.style.SuggestionSpan;
98import android.text.style.URLSpan;
99import android.text.style.UpdateAppearance;
100import android.text.util.Linkify;
101import android.util.AttributeSet;
102import android.util.Log;
103import android.util.TypedValue;
104import android.view.AccessibilityIterators.TextSegmentIterator;
105import android.view.ActionMode;
106import android.view.Choreographer;
107import android.view.DragEvent;
108import android.view.Gravity;
109import android.view.HapticFeedbackConstants;
110import android.view.KeyCharacterMap;
111import android.view.KeyEvent;
112import android.view.Menu;
113import android.view.MenuItem;
114import android.view.MotionEvent;
115import android.view.View;
116import android.view.ViewAssistData;
117import android.view.ViewConfiguration;
118import android.view.ViewDebug;
119import android.view.ViewGroup.LayoutParams;
120import android.view.ViewRootImpl;
121import android.view.ViewTreeObserver;
122import android.view.accessibility.AccessibilityEvent;
123import android.view.accessibility.AccessibilityManager;
124import android.view.accessibility.AccessibilityNodeInfo;
125import android.view.animation.AnimationUtils;
126import android.view.inputmethod.BaseInputConnection;
127import android.view.inputmethod.CompletionInfo;
128import android.view.inputmethod.CorrectionInfo;
129import android.view.inputmethod.EditorInfo;
130import android.view.inputmethod.ExtractedText;
131import android.view.inputmethod.ExtractedTextRequest;
132import android.view.inputmethod.InputConnection;
133import android.view.inputmethod.InputMethodManager;
134import android.view.textservice.SpellCheckerSubtype;
135import android.view.textservice.TextServicesManager;
136import android.widget.RemoteViews.RemoteView;
137
138import com.android.internal.util.FastMath;
139import com.android.internal.widget.EditableInputConnection;
140
141import org.xmlpull.v1.XmlPullParserException;
142
143import java.io.IOException;
144import java.lang.ref.WeakReference;
145import java.util.ArrayList;
146import java.util.Locale;
147
148import static android.os.Build.VERSION_CODES.JELLY_BEAN_MR1;
149
150/**
151 * Displays text to the user and optionally allows them to edit it.  A TextView
152 * is a complete text editor, however the basic class is configured to not
153 * allow editing; see {@link EditText} for a subclass that configures the text
154 * view for editing.
155 *
156 * <p>
157 * To allow users to copy some or all of the TextView's value and paste it somewhere else, set the
158 * XML attribute {@link android.R.styleable#TextView_textIsSelectable
159 * android:textIsSelectable} to "true" or call
160 * {@link #setTextIsSelectable setTextIsSelectable(true)}. The {@code textIsSelectable} flag
161 * allows users to make selection gestures in the TextView, which in turn triggers the system's
162 * built-in copy/paste controls.
163 * <p>
164 * <b>XML attributes</b>
165 * <p>
166 * See {@link android.R.styleable#TextView TextView Attributes},
167 * {@link android.R.styleable#View View Attributes}
168 *
169 * @attr ref android.R.styleable#TextView_text
170 * @attr ref android.R.styleable#TextView_bufferType
171 * @attr ref android.R.styleable#TextView_hint
172 * @attr ref android.R.styleable#TextView_textColor
173 * @attr ref android.R.styleable#TextView_textColorHighlight
174 * @attr ref android.R.styleable#TextView_textColorHint
175 * @attr ref android.R.styleable#TextView_textAppearance
176 * @attr ref android.R.styleable#TextView_textColorLink
177 * @attr ref android.R.styleable#TextView_textSize
178 * @attr ref android.R.styleable#TextView_textScaleX
179 * @attr ref android.R.styleable#TextView_fontFamily
180 * @attr ref android.R.styleable#TextView_typeface
181 * @attr ref android.R.styleable#TextView_textStyle
182 * @attr ref android.R.styleable#TextView_cursorVisible
183 * @attr ref android.R.styleable#TextView_maxLines
184 * @attr ref android.R.styleable#TextView_maxHeight
185 * @attr ref android.R.styleable#TextView_lines
186 * @attr ref android.R.styleable#TextView_height
187 * @attr ref android.R.styleable#TextView_minLines
188 * @attr ref android.R.styleable#TextView_minHeight
189 * @attr ref android.R.styleable#TextView_maxEms
190 * @attr ref android.R.styleable#TextView_maxWidth
191 * @attr ref android.R.styleable#TextView_ems
192 * @attr ref android.R.styleable#TextView_width
193 * @attr ref android.R.styleable#TextView_minEms
194 * @attr ref android.R.styleable#TextView_minWidth
195 * @attr ref android.R.styleable#TextView_gravity
196 * @attr ref android.R.styleable#TextView_scrollHorizontally
197 * @attr ref android.R.styleable#TextView_password
198 * @attr ref android.R.styleable#TextView_singleLine
199 * @attr ref android.R.styleable#TextView_selectAllOnFocus
200 * @attr ref android.R.styleable#TextView_includeFontPadding
201 * @attr ref android.R.styleable#TextView_maxLength
202 * @attr ref android.R.styleable#TextView_shadowColor
203 * @attr ref android.R.styleable#TextView_shadowDx
204 * @attr ref android.R.styleable#TextView_shadowDy
205 * @attr ref android.R.styleable#TextView_shadowRadius
206 * @attr ref android.R.styleable#TextView_autoLink
207 * @attr ref android.R.styleable#TextView_linksClickable
208 * @attr ref android.R.styleable#TextView_numeric
209 * @attr ref android.R.styleable#TextView_digits
210 * @attr ref android.R.styleable#TextView_phoneNumber
211 * @attr ref android.R.styleable#TextView_inputMethod
212 * @attr ref android.R.styleable#TextView_capitalize
213 * @attr ref android.R.styleable#TextView_autoText
214 * @attr ref android.R.styleable#TextView_editable
215 * @attr ref android.R.styleable#TextView_freezesText
216 * @attr ref android.R.styleable#TextView_ellipsize
217 * @attr ref android.R.styleable#TextView_drawableTop
218 * @attr ref android.R.styleable#TextView_drawableBottom
219 * @attr ref android.R.styleable#TextView_drawableRight
220 * @attr ref android.R.styleable#TextView_drawableLeft
221 * @attr ref android.R.styleable#TextView_drawableStart
222 * @attr ref android.R.styleable#TextView_drawableEnd
223 * @attr ref android.R.styleable#TextView_drawablePadding
224 * @attr ref android.R.styleable#TextView_drawableTint
225 * @attr ref android.R.styleable#TextView_drawableTintMode
226 * @attr ref android.R.styleable#TextView_lineSpacingExtra
227 * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
228 * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
229 * @attr ref android.R.styleable#TextView_inputType
230 * @attr ref android.R.styleable#TextView_imeOptions
231 * @attr ref android.R.styleable#TextView_privateImeOptions
232 * @attr ref android.R.styleable#TextView_imeActionLabel
233 * @attr ref android.R.styleable#TextView_imeActionId
234 * @attr ref android.R.styleable#TextView_editorExtras
235 * @attr ref android.R.styleable#TextView_elegantTextHeight
236 * @attr ref android.R.styleable#TextView_letterSpacing
237 * @attr ref android.R.styleable#TextView_fontFeatureSettings
238 */
239@RemoteView
240public class TextView extends View implements ViewTreeObserver.OnPreDrawListener {
241    static final String LOG_TAG = "TextView";
242    static final boolean DEBUG_EXTRACT = false;
243
244    // Enum for the "typeface" XML parameter.
245    // TODO: How can we get this from the XML instead of hardcoding it here?
246    private static final int SANS = 1;
247    private static final int SERIF = 2;
248    private static final int MONOSPACE = 3;
249
250    // Bitfield for the "numeric" XML parameter.
251    // TODO: How can we get this from the XML instead of hardcoding it here?
252    private static final int SIGNED = 2;
253    private static final int DECIMAL = 4;
254
255    /**
256     * Draw marquee text with fading edges as usual
257     */
258    private static final int MARQUEE_FADE_NORMAL = 0;
259
260    /**
261     * Draw marquee text as ellipsize end while inactive instead of with the fade.
262     * (Useful for devices where the fade can be expensive if overdone)
263     */
264    private static final int MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS = 1;
265
266    /**
267     * Draw marquee text with fading edges because it is currently active/animating.
268     */
269    private static final int MARQUEE_FADE_SWITCH_SHOW_FADE = 2;
270
271    private static final int LINES = 1;
272    private static final int EMS = LINES;
273    private static final int PIXELS = 2;
274
275    private static final RectF TEMP_RECTF = new RectF();
276
277    // XXX should be much larger
278    private static final int VERY_WIDE = 1024*1024;
279    private static final int ANIMATED_SCROLL_GAP = 250;
280
281    private static final InputFilter[] NO_FILTERS = new InputFilter[0];
282    private static final Spanned EMPTY_SPANNED = new SpannedString("");
283
284    private static final int CHANGE_WATCHER_PRIORITY = 100;
285
286    // New state used to change background based on whether this TextView is multiline.
287    private static final int[] MULTILINE_STATE_SET = { R.attr.state_multiline };
288
289    // System wide time for last cut or copy action.
290    static long LAST_CUT_OR_COPY_TIME;
291
292    private ColorStateList mTextColor;
293    private ColorStateList mHintTextColor;
294    private ColorStateList mLinkTextColor;
295    @ViewDebug.ExportedProperty(category = "text")
296    private int mCurTextColor;
297    private int mCurHintTextColor;
298    private boolean mFreezesText;
299    private boolean mDispatchTemporaryDetach;
300
301    /** Whether this view is temporarily detached from the parent view. */
302    boolean mTemporaryDetach;
303
304    private Editable.Factory mEditableFactory = Editable.Factory.getInstance();
305    private Spannable.Factory mSpannableFactory = Spannable.Factory.getInstance();
306
307    private float mShadowRadius, mShadowDx, mShadowDy;
308    private int mShadowColor;
309
310    private boolean mPreDrawRegistered;
311    private boolean mPreDrawListenerDetached;
312
313    // A flag to prevent repeated movements from escaping the enclosing text view. The idea here is
314    // that if a user is holding down a movement key to traverse text, we shouldn't also traverse
315    // the view hierarchy. On the other hand, if the user is using the movement key to traverse views
316    // (i.e. the first movement was to traverse out of this view, or this view was traversed into by
317    // the user holding the movement key down) then we shouldn't prevent the focus from changing.
318    private boolean mPreventDefaultMovement;
319
320    private TextUtils.TruncateAt mEllipsize;
321
322    static class Drawables {
323        static final int LEFT = 0;
324        static final int TOP = 1;
325        static final int RIGHT = 2;
326        static final int BOTTOM = 3;
327
328        static final int DRAWABLE_NONE = -1;
329        static final int DRAWABLE_RIGHT = 0;
330        static final int DRAWABLE_LEFT = 1;
331
332        final Rect mCompoundRect = new Rect();
333
334        final Drawable[] mShowing = new Drawable[4];
335
336        ColorStateList mTintList;
337        PorterDuff.Mode mTintMode;
338        boolean mHasTint;
339        boolean mHasTintMode;
340
341        Drawable mDrawableStart, mDrawableEnd, mDrawableError, mDrawableTemp;
342        Drawable mDrawableLeftInitial, mDrawableRightInitial;
343
344        boolean mIsRtlCompatibilityMode;
345        boolean mOverride;
346
347        int mDrawableSizeTop, mDrawableSizeBottom, mDrawableSizeLeft, mDrawableSizeRight,
348                mDrawableSizeStart, mDrawableSizeEnd, mDrawableSizeError, mDrawableSizeTemp;
349
350        int mDrawableWidthTop, mDrawableWidthBottom, mDrawableHeightLeft, mDrawableHeightRight,
351                mDrawableHeightStart, mDrawableHeightEnd, mDrawableHeightError, mDrawableHeightTemp;
352
353        int mDrawablePadding;
354
355        int mDrawableSaved = DRAWABLE_NONE;
356
357        public Drawables(Context context) {
358            final int targetSdkVersion = context.getApplicationInfo().targetSdkVersion;
359            mIsRtlCompatibilityMode = (targetSdkVersion < JELLY_BEAN_MR1 ||
360                !context.getApplicationInfo().hasRtlSupport());
361            mOverride = false;
362        }
363
364        public void resolveWithLayoutDirection(int layoutDirection) {
365            // First reset "left" and "right" drawables to their initial values
366            mShowing[Drawables.LEFT] = mDrawableLeftInitial;
367            mShowing[Drawables.RIGHT] = mDrawableRightInitial;
368
369            if (mIsRtlCompatibilityMode) {
370                // Use "start" drawable as "left" drawable if the "left" drawable was not defined
371                if (mDrawableStart != null && mShowing[Drawables.LEFT] == null) {
372                    mShowing[Drawables.LEFT] = mDrawableStart;
373                    mDrawableSizeLeft = mDrawableSizeStart;
374                    mDrawableHeightLeft = mDrawableHeightStart;
375                }
376                // Use "end" drawable as "right" drawable if the "right" drawable was not defined
377                if (mDrawableEnd != null && mShowing[Drawables.RIGHT] == null) {
378                    mShowing[Drawables.RIGHT] = mDrawableEnd;
379                    mDrawableSizeRight = mDrawableSizeEnd;
380                    mDrawableHeightRight = mDrawableHeightEnd;
381                }
382            } else {
383                // JB-MR1+ normal case: "start" / "end" drawables are overriding "left" / "right"
384                // drawable if and only if they have been defined
385                switch(layoutDirection) {
386                    case LAYOUT_DIRECTION_RTL:
387                        if (mOverride) {
388                            mShowing[Drawables.RIGHT] = mDrawableStart;
389                            mDrawableSizeRight = mDrawableSizeStart;
390                            mDrawableHeightRight = mDrawableHeightStart;
391
392                            mShowing[Drawables.LEFT] = mDrawableEnd;
393                            mDrawableSizeLeft = mDrawableSizeEnd;
394                            mDrawableHeightLeft = mDrawableHeightEnd;
395                        }
396                        break;
397
398                    case LAYOUT_DIRECTION_LTR:
399                    default:
400                        if (mOverride) {
401                            mShowing[Drawables.LEFT] = mDrawableStart;
402                            mDrawableSizeLeft = mDrawableSizeStart;
403                            mDrawableHeightLeft = mDrawableHeightStart;
404
405                            mShowing[Drawables.RIGHT] = mDrawableEnd;
406                            mDrawableSizeRight = mDrawableSizeEnd;
407                            mDrawableHeightRight = mDrawableHeightEnd;
408                        }
409                        break;
410                }
411            }
412            applyErrorDrawableIfNeeded(layoutDirection);
413            updateDrawablesLayoutDirection(layoutDirection);
414        }
415
416        private void updateDrawablesLayoutDirection(int layoutDirection) {
417            for (Drawable dr : mShowing) {
418                if (dr != null) {
419                    dr.setLayoutDirection(layoutDirection);
420                }
421            }
422        }
423
424        public void setErrorDrawable(Drawable dr, TextView tv) {
425            if (mDrawableError != dr && mDrawableError != null) {
426                mDrawableError.setCallback(null);
427            }
428            mDrawableError = dr;
429
430            if (mDrawableError != null) {
431                final Rect compoundRect = mCompoundRect;
432                final int[] state = tv.getDrawableState();
433
434                mDrawableError.setState(state);
435                mDrawableError.copyBounds(compoundRect);
436                mDrawableError.setCallback(tv);
437                mDrawableSizeError = compoundRect.width();
438                mDrawableHeightError = compoundRect.height();
439            } else {
440                mDrawableSizeError = mDrawableHeightError = 0;
441            }
442        }
443
444        private void applyErrorDrawableIfNeeded(int layoutDirection) {
445            // first restore the initial state if needed
446            switch (mDrawableSaved) {
447                case DRAWABLE_LEFT:
448                    mShowing[Drawables.LEFT] = mDrawableTemp;
449                    mDrawableSizeLeft = mDrawableSizeTemp;
450                    mDrawableHeightLeft = mDrawableHeightTemp;
451                    break;
452                case DRAWABLE_RIGHT:
453                    mShowing[Drawables.RIGHT] = mDrawableTemp;
454                    mDrawableSizeRight = mDrawableSizeTemp;
455                    mDrawableHeightRight = mDrawableHeightTemp;
456                    break;
457                case DRAWABLE_NONE:
458                default:
459            }
460            // then, if needed, assign the Error drawable to the correct location
461            if (mDrawableError != null) {
462                switch(layoutDirection) {
463                    case LAYOUT_DIRECTION_RTL:
464                        mDrawableSaved = DRAWABLE_LEFT;
465
466                        mDrawableTemp = mShowing[Drawables.LEFT];
467                        mDrawableSizeTemp = mDrawableSizeLeft;
468                        mDrawableHeightTemp = mDrawableHeightLeft;
469
470                        mShowing[Drawables.LEFT] = mDrawableError;
471                        mDrawableSizeLeft = mDrawableSizeError;
472                        mDrawableHeightLeft = mDrawableHeightError;
473                        break;
474                    case LAYOUT_DIRECTION_LTR:
475                    default:
476                        mDrawableSaved = DRAWABLE_RIGHT;
477
478                        mDrawableTemp = mShowing[Drawables.RIGHT];
479                        mDrawableSizeTemp = mDrawableSizeRight;
480                        mDrawableHeightTemp = mDrawableHeightRight;
481
482                        mShowing[Drawables.RIGHT] = mDrawableError;
483                        mDrawableSizeRight = mDrawableSizeError;
484                        mDrawableHeightRight = mDrawableHeightError;
485                        break;
486                }
487            }
488        }
489    }
490
491    Drawables mDrawables;
492
493    private CharWrapper mCharWrapper;
494
495    private Marquee mMarquee;
496    private boolean mRestartMarquee;
497
498    private int mMarqueeRepeatLimit = 3;
499
500    private int mLastLayoutDirection = -1;
501
502    /**
503     * On some devices the fading edges add a performance penalty if used
504     * extensively in the same layout. This mode indicates how the marquee
505     * is currently being shown, if applicable. (mEllipsize will == MARQUEE)
506     */
507    private int mMarqueeFadeMode = MARQUEE_FADE_NORMAL;
508
509    /**
510     * When mMarqueeFadeMode is not MARQUEE_FADE_NORMAL, this stores
511     * the layout that should be used when the mode switches.
512     */
513    private Layout mSavedMarqueeModeLayout;
514
515    @ViewDebug.ExportedProperty(category = "text")
516    private CharSequence mText;
517    private CharSequence mTransformed;
518    private BufferType mBufferType = BufferType.NORMAL;
519
520    private CharSequence mHint;
521    private Layout mHintLayout;
522
523    private MovementMethod mMovement;
524
525    private TransformationMethod mTransformation;
526    private boolean mAllowTransformationLengthChange;
527    private ChangeWatcher mChangeWatcher;
528
529    private ArrayList<TextWatcher> mListeners;
530
531    // display attributes
532    private final TextPaint mTextPaint;
533    private boolean mUserSetTextScaleX;
534    private Layout mLayout;
535    private boolean mLocaleChanged = false;
536
537    private int mGravity = Gravity.TOP | Gravity.START;
538    private boolean mHorizontallyScrolling;
539
540    private int mAutoLinkMask;
541    private boolean mLinksClickable = true;
542
543    private float mSpacingMult = 1.0f;
544    private float mSpacingAdd = 0.0f;
545
546    private int mMaximum = Integer.MAX_VALUE;
547    private int mMaxMode = LINES;
548    private int mMinimum = 0;
549    private int mMinMode = LINES;
550
551    private int mOldMaximum = mMaximum;
552    private int mOldMaxMode = mMaxMode;
553
554    private int mMaxWidth = Integer.MAX_VALUE;
555    private int mMaxWidthMode = PIXELS;
556    private int mMinWidth = 0;
557    private int mMinWidthMode = PIXELS;
558
559    private boolean mSingleLine;
560    private int mDesiredHeightAtMeasure = -1;
561    private boolean mIncludePad = true;
562    private int mDeferScroll = -1;
563
564    // tmp primitives, so we don't alloc them on each draw
565    private Rect mTempRect;
566    private long mLastScroll;
567    private Scroller mScroller;
568
569    private BoringLayout.Metrics mBoring, mHintBoring;
570    private BoringLayout mSavedLayout, mSavedHintLayout;
571
572    private TextDirectionHeuristic mTextDir;
573
574    private InputFilter[] mFilters = NO_FILTERS;
575
576    private volatile Locale mCurrentSpellCheckerLocaleCache;
577
578    // It is possible to have a selection even when mEditor is null (programmatically set, like when
579    // a link is pressed). These highlight-related fields do not go in mEditor.
580    int mHighlightColor = 0x6633B5E5;
581    private Path mHighlightPath;
582    private final Paint mHighlightPaint;
583    private boolean mHighlightPathBogus = true;
584
585    // Although these fields are specific to editable text, they are not added to Editor because
586    // they are defined by the TextView's style and are theme-dependent.
587    int mCursorDrawableRes;
588    // These four fields, could be moved to Editor, since we know their default values and we
589    // could condition the creation of the Editor to a non standard value. This is however
590    // brittle since the hardcoded values here (such as
591    // com.android.internal.R.drawable.text_select_handle_left) would have to be updated if the
592    // default style is modified.
593    int mTextSelectHandleLeftRes;
594    int mTextSelectHandleRightRes;
595    int mTextSelectHandleRes;
596    int mTextEditSuggestionItemLayout;
597
598    /**
599     * EditText specific data, created on demand when one of the Editor fields is used.
600     * See {@link #createEditorIfNeeded()}.
601     */
602    private Editor mEditor;
603
604    /*
605     * Kick-start the font cache for the zygote process (to pay the cost of
606     * initializing freetype for our default font only once).
607     */
608    static {
609        Paint p = new Paint();
610        p.setAntiAlias(true);
611        // We don't care about the result, just the side-effect of measuring.
612        p.measureText("H");
613    }
614
615    /**
616     * Interface definition for a callback to be invoked when an action is
617     * performed on the editor.
618     */
619    public interface OnEditorActionListener {
620        /**
621         * Called when an action is being performed.
622         *
623         * @param v The view that was clicked.
624         * @param actionId Identifier of the action.  This will be either the
625         * identifier you supplied, or {@link EditorInfo#IME_NULL
626         * EditorInfo.IME_NULL} if being called due to the enter key
627         * being pressed.
628         * @param event If triggered by an enter key, this is the event;
629         * otherwise, this is null.
630         * @return Return true if you have consumed the action, else false.
631         */
632        boolean onEditorAction(TextView v, int actionId, KeyEvent event);
633    }
634
635    public TextView(Context context) {
636        this(context, null);
637    }
638
639    public TextView(Context context, AttributeSet attrs) {
640        this(context, attrs, com.android.internal.R.attr.textViewStyle);
641    }
642
643    public TextView(Context context, AttributeSet attrs, int defStyleAttr) {
644        this(context, attrs, defStyleAttr, 0);
645    }
646
647    @SuppressWarnings("deprecation")
648    public TextView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
649        super(context, attrs, defStyleAttr, defStyleRes);
650
651        mText = "";
652
653        final Resources res = getResources();
654        final CompatibilityInfo compat = res.getCompatibilityInfo();
655
656        mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
657        mTextPaint.density = res.getDisplayMetrics().density;
658        mTextPaint.setCompatibilityScaling(compat.applicationScale);
659
660        mHighlightPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
661        mHighlightPaint.setCompatibilityScaling(compat.applicationScale);
662
663        mMovement = getDefaultMovementMethod();
664
665        mTransformation = null;
666
667        int textColorHighlight = 0;
668        ColorStateList textColor = null;
669        ColorStateList textColorHint = null;
670        ColorStateList textColorLink = null;
671        int textSize = 15;
672        String fontFamily = null;
673        boolean fontFamilyExplicit = false;
674        int typefaceIndex = -1;
675        int styleIndex = -1;
676        boolean allCaps = false;
677        int shadowcolor = 0;
678        float dx = 0, dy = 0, r = 0;
679        boolean elegant = false;
680        float letterSpacing = 0;
681        String fontFeatureSettings = null;
682
683        final Resources.Theme theme = context.getTheme();
684
685        /*
686         * Look the appearance up without checking first if it exists because
687         * almost every TextView has one and it greatly simplifies the logic
688         * to be able to parse the appearance first and then let specific tags
689         * for this View override it.
690         */
691        TypedArray a = theme.obtainStyledAttributes(attrs,
692                com.android.internal.R.styleable.TextViewAppearance, defStyleAttr, defStyleRes);
693        TypedArray appearance = null;
694        int ap = a.getResourceId(
695                com.android.internal.R.styleable.TextViewAppearance_textAppearance, -1);
696        a.recycle();
697        if (ap != -1) {
698            appearance = theme.obtainStyledAttributes(
699                    ap, com.android.internal.R.styleable.TextAppearance);
700        }
701        if (appearance != null) {
702            int n = appearance.getIndexCount();
703            for (int i = 0; i < n; i++) {
704                int attr = appearance.getIndex(i);
705
706                switch (attr) {
707                case com.android.internal.R.styleable.TextAppearance_textColorHighlight:
708                    textColorHighlight = appearance.getColor(attr, textColorHighlight);
709                    break;
710
711                case com.android.internal.R.styleable.TextAppearance_textColor:
712                    textColor = appearance.getColorStateList(attr);
713                    break;
714
715                case com.android.internal.R.styleable.TextAppearance_textColorHint:
716                    textColorHint = appearance.getColorStateList(attr);
717                    break;
718
719                case com.android.internal.R.styleable.TextAppearance_textColorLink:
720                    textColorLink = appearance.getColorStateList(attr);
721                    break;
722
723                case com.android.internal.R.styleable.TextAppearance_textSize:
724                    textSize = appearance.getDimensionPixelSize(attr, textSize);
725                    break;
726
727                case com.android.internal.R.styleable.TextAppearance_typeface:
728                    typefaceIndex = appearance.getInt(attr, -1);
729                    break;
730
731                case com.android.internal.R.styleable.TextAppearance_fontFamily:
732                    fontFamily = appearance.getString(attr);
733                    break;
734
735                case com.android.internal.R.styleable.TextAppearance_textStyle:
736                    styleIndex = appearance.getInt(attr, -1);
737                    break;
738
739                case com.android.internal.R.styleable.TextAppearance_textAllCaps:
740                    allCaps = appearance.getBoolean(attr, false);
741                    break;
742
743                case com.android.internal.R.styleable.TextAppearance_shadowColor:
744                    shadowcolor = appearance.getInt(attr, 0);
745                    break;
746
747                case com.android.internal.R.styleable.TextAppearance_shadowDx:
748                    dx = appearance.getFloat(attr, 0);
749                    break;
750
751                case com.android.internal.R.styleable.TextAppearance_shadowDy:
752                    dy = appearance.getFloat(attr, 0);
753                    break;
754
755                case com.android.internal.R.styleable.TextAppearance_shadowRadius:
756                    r = appearance.getFloat(attr, 0);
757                    break;
758
759                case com.android.internal.R.styleable.TextAppearance_elegantTextHeight:
760                    elegant = appearance.getBoolean(attr, false);
761                    break;
762
763                case com.android.internal.R.styleable.TextAppearance_letterSpacing:
764                    letterSpacing = appearance.getFloat(attr, 0);
765                    break;
766
767                case com.android.internal.R.styleable.TextAppearance_fontFeatureSettings:
768                    fontFeatureSettings = appearance.getString(attr);
769                    break;
770                }
771            }
772
773            appearance.recycle();
774        }
775
776        boolean editable = getDefaultEditable();
777        CharSequence inputMethod = null;
778        int numeric = 0;
779        CharSequence digits = null;
780        boolean phone = false;
781        boolean autotext = false;
782        int autocap = -1;
783        int buffertype = 0;
784        boolean selectallonfocus = false;
785        Drawable drawableLeft = null, drawableTop = null, drawableRight = null,
786            drawableBottom = null, drawableStart = null, drawableEnd = null;
787        ColorStateList drawableTint = null;
788        PorterDuff.Mode drawableTintMode = null;
789        int drawablePadding = 0;
790        int ellipsize = -1;
791        boolean singleLine = false;
792        int maxlength = -1;
793        CharSequence text = "";
794        CharSequence hint = null;
795        boolean password = false;
796        int inputType = EditorInfo.TYPE_NULL;
797
798        a = theme.obtainStyledAttributes(
799                    attrs, com.android.internal.R.styleable.TextView, defStyleAttr, defStyleRes);
800
801        int n = a.getIndexCount();
802        for (int i = 0; i < n; i++) {
803            int attr = a.getIndex(i);
804
805            switch (attr) {
806            case com.android.internal.R.styleable.TextView_editable:
807                editable = a.getBoolean(attr, editable);
808                break;
809
810            case com.android.internal.R.styleable.TextView_inputMethod:
811                inputMethod = a.getText(attr);
812                break;
813
814            case com.android.internal.R.styleable.TextView_numeric:
815                numeric = a.getInt(attr, numeric);
816                break;
817
818            case com.android.internal.R.styleable.TextView_digits:
819                digits = a.getText(attr);
820                break;
821
822            case com.android.internal.R.styleable.TextView_phoneNumber:
823                phone = a.getBoolean(attr, phone);
824                break;
825
826            case com.android.internal.R.styleable.TextView_autoText:
827                autotext = a.getBoolean(attr, autotext);
828                break;
829
830            case com.android.internal.R.styleable.TextView_capitalize:
831                autocap = a.getInt(attr, autocap);
832                break;
833
834            case com.android.internal.R.styleable.TextView_bufferType:
835                buffertype = a.getInt(attr, buffertype);
836                break;
837
838            case com.android.internal.R.styleable.TextView_selectAllOnFocus:
839                selectallonfocus = a.getBoolean(attr, selectallonfocus);
840                break;
841
842            case com.android.internal.R.styleable.TextView_autoLink:
843                mAutoLinkMask = a.getInt(attr, 0);
844                break;
845
846            case com.android.internal.R.styleable.TextView_linksClickable:
847                mLinksClickable = a.getBoolean(attr, true);
848                break;
849
850            case com.android.internal.R.styleable.TextView_drawableLeft:
851                drawableLeft = a.getDrawable(attr);
852                break;
853
854            case com.android.internal.R.styleable.TextView_drawableTop:
855                drawableTop = a.getDrawable(attr);
856                break;
857
858            case com.android.internal.R.styleable.TextView_drawableRight:
859                drawableRight = a.getDrawable(attr);
860                break;
861
862            case com.android.internal.R.styleable.TextView_drawableBottom:
863                drawableBottom = a.getDrawable(attr);
864                break;
865
866            case com.android.internal.R.styleable.TextView_drawableStart:
867                drawableStart = a.getDrawable(attr);
868                break;
869
870            case com.android.internal.R.styleable.TextView_drawableEnd:
871                drawableEnd = a.getDrawable(attr);
872                break;
873
874            case com.android.internal.R.styleable.TextView_drawableTint:
875                drawableTint = a.getColorStateList(attr);
876                break;
877
878            case com.android.internal.R.styleable.TextView_drawableTintMode:
879                drawableTintMode = Drawable.parseTintMode(a.getInt(attr, -1), drawableTintMode);
880                break;
881
882            case com.android.internal.R.styleable.TextView_drawablePadding:
883                drawablePadding = a.getDimensionPixelSize(attr, drawablePadding);
884                break;
885
886            case com.android.internal.R.styleable.TextView_maxLines:
887                setMaxLines(a.getInt(attr, -1));
888                break;
889
890            case com.android.internal.R.styleable.TextView_maxHeight:
891                setMaxHeight(a.getDimensionPixelSize(attr, -1));
892                break;
893
894            case com.android.internal.R.styleable.TextView_lines:
895                setLines(a.getInt(attr, -1));
896                break;
897
898            case com.android.internal.R.styleable.TextView_height:
899                setHeight(a.getDimensionPixelSize(attr, -1));
900                break;
901
902            case com.android.internal.R.styleable.TextView_minLines:
903                setMinLines(a.getInt(attr, -1));
904                break;
905
906            case com.android.internal.R.styleable.TextView_minHeight:
907                setMinHeight(a.getDimensionPixelSize(attr, -1));
908                break;
909
910            case com.android.internal.R.styleable.TextView_maxEms:
911                setMaxEms(a.getInt(attr, -1));
912                break;
913
914            case com.android.internal.R.styleable.TextView_maxWidth:
915                setMaxWidth(a.getDimensionPixelSize(attr, -1));
916                break;
917
918            case com.android.internal.R.styleable.TextView_ems:
919                setEms(a.getInt(attr, -1));
920                break;
921
922            case com.android.internal.R.styleable.TextView_width:
923                setWidth(a.getDimensionPixelSize(attr, -1));
924                break;
925
926            case com.android.internal.R.styleable.TextView_minEms:
927                setMinEms(a.getInt(attr, -1));
928                break;
929
930            case com.android.internal.R.styleable.TextView_minWidth:
931                setMinWidth(a.getDimensionPixelSize(attr, -1));
932                break;
933
934            case com.android.internal.R.styleable.TextView_gravity:
935                setGravity(a.getInt(attr, -1));
936                break;
937
938            case com.android.internal.R.styleable.TextView_hint:
939                hint = a.getText(attr);
940                break;
941
942            case com.android.internal.R.styleable.TextView_text:
943                text = a.getText(attr);
944                break;
945
946            case com.android.internal.R.styleable.TextView_scrollHorizontally:
947                if (a.getBoolean(attr, false)) {
948                    setHorizontallyScrolling(true);
949                }
950                break;
951
952            case com.android.internal.R.styleable.TextView_singleLine:
953                singleLine = a.getBoolean(attr, singleLine);
954                break;
955
956            case com.android.internal.R.styleable.TextView_ellipsize:
957                ellipsize = a.getInt(attr, ellipsize);
958                break;
959
960            case com.android.internal.R.styleable.TextView_marqueeRepeatLimit:
961                setMarqueeRepeatLimit(a.getInt(attr, mMarqueeRepeatLimit));
962                break;
963
964            case com.android.internal.R.styleable.TextView_includeFontPadding:
965                if (!a.getBoolean(attr, true)) {
966                    setIncludeFontPadding(false);
967                }
968                break;
969
970            case com.android.internal.R.styleable.TextView_cursorVisible:
971                if (!a.getBoolean(attr, true)) {
972                    setCursorVisible(false);
973                }
974                break;
975
976            case com.android.internal.R.styleable.TextView_maxLength:
977                maxlength = a.getInt(attr, -1);
978                break;
979
980            case com.android.internal.R.styleable.TextView_textScaleX:
981                setTextScaleX(a.getFloat(attr, 1.0f));
982                break;
983
984            case com.android.internal.R.styleable.TextView_freezesText:
985                mFreezesText = a.getBoolean(attr, false);
986                break;
987
988            case com.android.internal.R.styleable.TextView_shadowColor:
989                shadowcolor = a.getInt(attr, 0);
990                break;
991
992            case com.android.internal.R.styleable.TextView_shadowDx:
993                dx = a.getFloat(attr, 0);
994                break;
995
996            case com.android.internal.R.styleable.TextView_shadowDy:
997                dy = a.getFloat(attr, 0);
998                break;
999
1000            case com.android.internal.R.styleable.TextView_shadowRadius:
1001                r = a.getFloat(attr, 0);
1002                break;
1003
1004            case com.android.internal.R.styleable.TextView_enabled:
1005                setEnabled(a.getBoolean(attr, isEnabled()));
1006                break;
1007
1008            case com.android.internal.R.styleable.TextView_textColorHighlight:
1009                textColorHighlight = a.getColor(attr, textColorHighlight);
1010                break;
1011
1012            case com.android.internal.R.styleable.TextView_textColor:
1013                textColor = a.getColorStateList(attr);
1014                break;
1015
1016            case com.android.internal.R.styleable.TextView_textColorHint:
1017                textColorHint = a.getColorStateList(attr);
1018                break;
1019
1020            case com.android.internal.R.styleable.TextView_textColorLink:
1021                textColorLink = a.getColorStateList(attr);
1022                break;
1023
1024            case com.android.internal.R.styleable.TextView_textSize:
1025                textSize = a.getDimensionPixelSize(attr, textSize);
1026                break;
1027
1028            case com.android.internal.R.styleable.TextView_typeface:
1029                typefaceIndex = a.getInt(attr, typefaceIndex);
1030                break;
1031
1032            case com.android.internal.R.styleable.TextView_textStyle:
1033                styleIndex = a.getInt(attr, styleIndex);
1034                break;
1035
1036            case com.android.internal.R.styleable.TextView_fontFamily:
1037                fontFamily = a.getString(attr);
1038                fontFamilyExplicit = true;
1039                break;
1040
1041            case com.android.internal.R.styleable.TextView_password:
1042                password = a.getBoolean(attr, password);
1043                break;
1044
1045            case com.android.internal.R.styleable.TextView_lineSpacingExtra:
1046                mSpacingAdd = a.getDimensionPixelSize(attr, (int) mSpacingAdd);
1047                break;
1048
1049            case com.android.internal.R.styleable.TextView_lineSpacingMultiplier:
1050                mSpacingMult = a.getFloat(attr, mSpacingMult);
1051                break;
1052
1053            case com.android.internal.R.styleable.TextView_inputType:
1054                inputType = a.getInt(attr, EditorInfo.TYPE_NULL);
1055                break;
1056
1057            case com.android.internal.R.styleable.TextView_imeOptions:
1058                createEditorIfNeeded();
1059                mEditor.createInputContentTypeIfNeeded();
1060                mEditor.mInputContentType.imeOptions = a.getInt(attr,
1061                        mEditor.mInputContentType.imeOptions);
1062                break;
1063
1064            case com.android.internal.R.styleable.TextView_imeActionLabel:
1065                createEditorIfNeeded();
1066                mEditor.createInputContentTypeIfNeeded();
1067                mEditor.mInputContentType.imeActionLabel = a.getText(attr);
1068                break;
1069
1070            case com.android.internal.R.styleable.TextView_imeActionId:
1071                createEditorIfNeeded();
1072                mEditor.createInputContentTypeIfNeeded();
1073                mEditor.mInputContentType.imeActionId = a.getInt(attr,
1074                        mEditor.mInputContentType.imeActionId);
1075                break;
1076
1077            case com.android.internal.R.styleable.TextView_privateImeOptions:
1078                setPrivateImeOptions(a.getString(attr));
1079                break;
1080
1081            case com.android.internal.R.styleable.TextView_editorExtras:
1082                try {
1083                    setInputExtras(a.getResourceId(attr, 0));
1084                } catch (XmlPullParserException e) {
1085                    Log.w(LOG_TAG, "Failure reading input extras", e);
1086                } catch (IOException e) {
1087                    Log.w(LOG_TAG, "Failure reading input extras", e);
1088                }
1089                break;
1090
1091            case com.android.internal.R.styleable.TextView_textCursorDrawable:
1092                mCursorDrawableRes = a.getResourceId(attr, 0);
1093                break;
1094
1095            case com.android.internal.R.styleable.TextView_textSelectHandleLeft:
1096                mTextSelectHandleLeftRes = a.getResourceId(attr, 0);
1097                break;
1098
1099            case com.android.internal.R.styleable.TextView_textSelectHandleRight:
1100                mTextSelectHandleRightRes = a.getResourceId(attr, 0);
1101                break;
1102
1103            case com.android.internal.R.styleable.TextView_textSelectHandle:
1104                mTextSelectHandleRes = a.getResourceId(attr, 0);
1105                break;
1106
1107            case com.android.internal.R.styleable.TextView_textEditSuggestionItemLayout:
1108                mTextEditSuggestionItemLayout = a.getResourceId(attr, 0);
1109                break;
1110
1111            case com.android.internal.R.styleable.TextView_textIsSelectable:
1112                setTextIsSelectable(a.getBoolean(attr, false));
1113                break;
1114
1115            case com.android.internal.R.styleable.TextView_textAllCaps:
1116                allCaps = a.getBoolean(attr, false);
1117                break;
1118
1119            case com.android.internal.R.styleable.TextView_elegantTextHeight:
1120                elegant = a.getBoolean(attr, false);
1121                break;
1122
1123            case com.android.internal.R.styleable.TextView_letterSpacing:
1124                letterSpacing = a.getFloat(attr, 0);
1125                break;
1126
1127            case com.android.internal.R.styleable.TextView_fontFeatureSettings:
1128                fontFeatureSettings = a.getString(attr);
1129                break;
1130            }
1131        }
1132        a.recycle();
1133
1134        BufferType bufferType = BufferType.EDITABLE;
1135
1136        final int variation =
1137                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
1138        final boolean passwordInputType = variation
1139                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD);
1140        final boolean webPasswordInputType = variation
1141                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD);
1142        final boolean numberPasswordInputType = variation
1143                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
1144
1145        if (inputMethod != null) {
1146            Class<?> c;
1147
1148            try {
1149                c = Class.forName(inputMethod.toString());
1150            } catch (ClassNotFoundException ex) {
1151                throw new RuntimeException(ex);
1152            }
1153
1154            try {
1155                createEditorIfNeeded();
1156                mEditor.mKeyListener = (KeyListener) c.newInstance();
1157            } catch (InstantiationException ex) {
1158                throw new RuntimeException(ex);
1159            } catch (IllegalAccessException ex) {
1160                throw new RuntimeException(ex);
1161            }
1162            try {
1163                mEditor.mInputType = inputType != EditorInfo.TYPE_NULL
1164                        ? inputType
1165                        : mEditor.mKeyListener.getInputType();
1166            } catch (IncompatibleClassChangeError e) {
1167                mEditor.mInputType = EditorInfo.TYPE_CLASS_TEXT;
1168            }
1169        } else if (digits != null) {
1170            createEditorIfNeeded();
1171            mEditor.mKeyListener = DigitsKeyListener.getInstance(digits.toString());
1172            // If no input type was specified, we will default to generic
1173            // text, since we can't tell the IME about the set of digits
1174            // that was selected.
1175            mEditor.mInputType = inputType != EditorInfo.TYPE_NULL
1176                    ? inputType : EditorInfo.TYPE_CLASS_TEXT;
1177        } else if (inputType != EditorInfo.TYPE_NULL) {
1178            setInputType(inputType, true);
1179            // If set, the input type overrides what was set using the deprecated singleLine flag.
1180            singleLine = !isMultilineInputType(inputType);
1181        } else if (phone) {
1182            createEditorIfNeeded();
1183            mEditor.mKeyListener = DialerKeyListener.getInstance();
1184            mEditor.mInputType = inputType = EditorInfo.TYPE_CLASS_PHONE;
1185        } else if (numeric != 0) {
1186            createEditorIfNeeded();
1187            mEditor.mKeyListener = DigitsKeyListener.getInstance((numeric & SIGNED) != 0,
1188                                                   (numeric & DECIMAL) != 0);
1189            inputType = EditorInfo.TYPE_CLASS_NUMBER;
1190            if ((numeric & SIGNED) != 0) {
1191                inputType |= EditorInfo.TYPE_NUMBER_FLAG_SIGNED;
1192            }
1193            if ((numeric & DECIMAL) != 0) {
1194                inputType |= EditorInfo.TYPE_NUMBER_FLAG_DECIMAL;
1195            }
1196            mEditor.mInputType = inputType;
1197        } else if (autotext || autocap != -1) {
1198            TextKeyListener.Capitalize cap;
1199
1200            inputType = EditorInfo.TYPE_CLASS_TEXT;
1201
1202            switch (autocap) {
1203            case 1:
1204                cap = TextKeyListener.Capitalize.SENTENCES;
1205                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES;
1206                break;
1207
1208            case 2:
1209                cap = TextKeyListener.Capitalize.WORDS;
1210                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS;
1211                break;
1212
1213            case 3:
1214                cap = TextKeyListener.Capitalize.CHARACTERS;
1215                inputType |= EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS;
1216                break;
1217
1218            default:
1219                cap = TextKeyListener.Capitalize.NONE;
1220                break;
1221            }
1222
1223            createEditorIfNeeded();
1224            mEditor.mKeyListener = TextKeyListener.getInstance(autotext, cap);
1225            mEditor.mInputType = inputType;
1226        } else if (isTextSelectable()) {
1227            // Prevent text changes from keyboard.
1228            if (mEditor != null) {
1229                mEditor.mKeyListener = null;
1230                mEditor.mInputType = EditorInfo.TYPE_NULL;
1231            }
1232            bufferType = BufferType.SPANNABLE;
1233            // So that selection can be changed using arrow keys and touch is handled.
1234            setMovementMethod(ArrowKeyMovementMethod.getInstance());
1235        } else if (editable) {
1236            createEditorIfNeeded();
1237            mEditor.mKeyListener = TextKeyListener.getInstance();
1238            mEditor.mInputType = EditorInfo.TYPE_CLASS_TEXT;
1239        } else {
1240            if (mEditor != null) mEditor.mKeyListener = null;
1241
1242            switch (buffertype) {
1243                case 0:
1244                    bufferType = BufferType.NORMAL;
1245                    break;
1246                case 1:
1247                    bufferType = BufferType.SPANNABLE;
1248                    break;
1249                case 2:
1250                    bufferType = BufferType.EDITABLE;
1251                    break;
1252            }
1253        }
1254
1255        if (mEditor != null) mEditor.adjustInputType(password, passwordInputType,
1256                webPasswordInputType, numberPasswordInputType);
1257
1258        if (selectallonfocus) {
1259            createEditorIfNeeded();
1260            mEditor.mSelectAllOnFocus = true;
1261
1262            if (bufferType == BufferType.NORMAL)
1263                bufferType = BufferType.SPANNABLE;
1264        }
1265
1266        // Set up the tint (if needed) before setting the drawables so that it
1267        // gets applied correctly.
1268        if (drawableTint != null || drawableTintMode != null) {
1269            if (mDrawables == null) {
1270                mDrawables = new Drawables(context);
1271            }
1272            if (drawableTint != null) {
1273                mDrawables.mTintList = drawableTint;
1274                mDrawables.mHasTint = true;
1275            }
1276            if (drawableTintMode != null) {
1277                mDrawables.mTintMode = drawableTintMode;
1278                mDrawables.mHasTintMode = true;
1279            }
1280        }
1281
1282        // This call will save the initial left/right drawables
1283        setCompoundDrawablesWithIntrinsicBounds(
1284            drawableLeft, drawableTop, drawableRight, drawableBottom);
1285        setRelativeDrawablesIfNeeded(drawableStart, drawableEnd);
1286        setCompoundDrawablePadding(drawablePadding);
1287
1288        // Same as setSingleLine(), but make sure the transformation method and the maximum number
1289        // of lines of height are unchanged for multi-line TextViews.
1290        setInputTypeSingleLine(singleLine);
1291        applySingleLine(singleLine, singleLine, singleLine);
1292
1293        if (singleLine && getKeyListener() == null && ellipsize < 0) {
1294                ellipsize = 3; // END
1295        }
1296
1297        switch (ellipsize) {
1298            case 1:
1299                setEllipsize(TextUtils.TruncateAt.START);
1300                break;
1301            case 2:
1302                setEllipsize(TextUtils.TruncateAt.MIDDLE);
1303                break;
1304            case 3:
1305                setEllipsize(TextUtils.TruncateAt.END);
1306                break;
1307            case 4:
1308                if (ViewConfiguration.get(context).isFadingMarqueeEnabled()) {
1309                    setHorizontalFadingEdgeEnabled(true);
1310                    mMarqueeFadeMode = MARQUEE_FADE_NORMAL;
1311                } else {
1312                    setHorizontalFadingEdgeEnabled(false);
1313                    mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
1314                }
1315                setEllipsize(TextUtils.TruncateAt.MARQUEE);
1316                break;
1317        }
1318
1319        setTextColor(textColor != null ? textColor : ColorStateList.valueOf(0xFF000000));
1320        setHintTextColor(textColorHint);
1321        setLinkTextColor(textColorLink);
1322        if (textColorHighlight != 0) {
1323            setHighlightColor(textColorHighlight);
1324        }
1325        setRawTextSize(textSize);
1326        setElegantTextHeight(elegant);
1327        setLetterSpacing(letterSpacing);
1328        setFontFeatureSettings(fontFeatureSettings);
1329
1330        if (allCaps) {
1331            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
1332        }
1333
1334        if (password || passwordInputType || webPasswordInputType || numberPasswordInputType) {
1335            setTransformationMethod(PasswordTransformationMethod.getInstance());
1336            typefaceIndex = MONOSPACE;
1337        } else if (mEditor != null &&
1338                (mEditor.mInputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION))
1339                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)) {
1340            typefaceIndex = MONOSPACE;
1341        }
1342
1343        if (typefaceIndex != -1 && !fontFamilyExplicit) {
1344            fontFamily = null;
1345        }
1346        setTypefaceFromAttrs(fontFamily, typefaceIndex, styleIndex);
1347
1348        if (shadowcolor != 0) {
1349            setShadowLayer(r, dx, dy, shadowcolor);
1350        }
1351
1352        if (maxlength >= 0) {
1353            setFilters(new InputFilter[] { new InputFilter.LengthFilter(maxlength) });
1354        } else {
1355            setFilters(NO_FILTERS);
1356        }
1357
1358        setText(text, bufferType);
1359        if (hint != null) setHint(hint);
1360
1361        /*
1362         * Views are not normally focusable unless specified to be.
1363         * However, TextViews that have input or movement methods *are*
1364         * focusable by default.
1365         */
1366        a = context.obtainStyledAttributes(
1367                attrs, com.android.internal.R.styleable.View, defStyleAttr, defStyleRes);
1368
1369        boolean focusable = mMovement != null || getKeyListener() != null;
1370        boolean clickable = focusable || isClickable();
1371        boolean longClickable = focusable || isLongClickable();
1372
1373        n = a.getIndexCount();
1374        for (int i = 0; i < n; i++) {
1375            int attr = a.getIndex(i);
1376
1377            switch (attr) {
1378            case com.android.internal.R.styleable.View_focusable:
1379                focusable = a.getBoolean(attr, focusable);
1380                break;
1381
1382            case com.android.internal.R.styleable.View_clickable:
1383                clickable = a.getBoolean(attr, clickable);
1384                break;
1385
1386            case com.android.internal.R.styleable.View_longClickable:
1387                longClickable = a.getBoolean(attr, longClickable);
1388                break;
1389            }
1390        }
1391        a.recycle();
1392
1393        setFocusable(focusable);
1394        setClickable(clickable);
1395        setLongClickable(longClickable);
1396
1397        if (mEditor != null) mEditor.prepareCursorControllers();
1398
1399        // If not explicitly specified this view is important for accessibility.
1400        if (getImportantForAccessibility() == IMPORTANT_FOR_ACCESSIBILITY_AUTO) {
1401            setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_YES);
1402        }
1403    }
1404
1405    private void setTypefaceFromAttrs(String familyName, int typefaceIndex, int styleIndex) {
1406        Typeface tf = null;
1407        if (familyName != null) {
1408            tf = Typeface.create(familyName, styleIndex);
1409            if (tf != null) {
1410                setTypeface(tf);
1411                return;
1412            }
1413        }
1414        switch (typefaceIndex) {
1415            case SANS:
1416                tf = Typeface.SANS_SERIF;
1417                break;
1418
1419            case SERIF:
1420                tf = Typeface.SERIF;
1421                break;
1422
1423            case MONOSPACE:
1424                tf = Typeface.MONOSPACE;
1425                break;
1426        }
1427
1428        setTypeface(tf, styleIndex);
1429    }
1430
1431    private void setRelativeDrawablesIfNeeded(Drawable start, Drawable end) {
1432        boolean hasRelativeDrawables = (start != null) || (end != null);
1433        if (hasRelativeDrawables) {
1434            Drawables dr = mDrawables;
1435            if (dr == null) {
1436                mDrawables = dr = new Drawables(getContext());
1437            }
1438            mDrawables.mOverride = true;
1439            final Rect compoundRect = dr.mCompoundRect;
1440            int[] state = getDrawableState();
1441            if (start != null) {
1442                start.setBounds(0, 0, start.getIntrinsicWidth(), start.getIntrinsicHeight());
1443                start.setState(state);
1444                start.copyBounds(compoundRect);
1445                start.setCallback(this);
1446
1447                dr.mDrawableStart = start;
1448                dr.mDrawableSizeStart = compoundRect.width();
1449                dr.mDrawableHeightStart = compoundRect.height();
1450            } else {
1451                dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
1452            }
1453            if (end != null) {
1454                end.setBounds(0, 0, end.getIntrinsicWidth(), end.getIntrinsicHeight());
1455                end.setState(state);
1456                end.copyBounds(compoundRect);
1457                end.setCallback(this);
1458
1459                dr.mDrawableEnd = end;
1460                dr.mDrawableSizeEnd = compoundRect.width();
1461                dr.mDrawableHeightEnd = compoundRect.height();
1462            } else {
1463                dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
1464            }
1465            resetResolvedDrawables();
1466            resolveDrawables();
1467            applyCompoundDrawableTint();
1468        }
1469    }
1470
1471    @Override
1472    public void setEnabled(boolean enabled) {
1473        if (enabled == isEnabled()) {
1474            return;
1475        }
1476
1477        if (!enabled) {
1478            // Hide the soft input if the currently active TextView is disabled
1479            InputMethodManager imm = InputMethodManager.peekInstance();
1480            if (imm != null && imm.isActive(this)) {
1481                imm.hideSoftInputFromWindow(getWindowToken(), 0);
1482            }
1483        }
1484
1485        super.setEnabled(enabled);
1486
1487        if (enabled) {
1488            // Make sure IME is updated with current editor info.
1489            InputMethodManager imm = InputMethodManager.peekInstance();
1490            if (imm != null) imm.restartInput(this);
1491        }
1492
1493        // Will change text color
1494        if (mEditor != null) {
1495            mEditor.invalidateTextDisplayList();
1496            mEditor.prepareCursorControllers();
1497
1498            // start or stop the cursor blinking as appropriate
1499            mEditor.makeBlink();
1500        }
1501    }
1502
1503    /**
1504     * Sets the typeface and style in which the text should be displayed,
1505     * and turns on the fake bold and italic bits in the Paint if the
1506     * Typeface that you provided does not have all the bits in the
1507     * style that you specified.
1508     *
1509     * @attr ref android.R.styleable#TextView_typeface
1510     * @attr ref android.R.styleable#TextView_textStyle
1511     */
1512    public void setTypeface(Typeface tf, int style) {
1513        if (style > 0) {
1514            if (tf == null) {
1515                tf = Typeface.defaultFromStyle(style);
1516            } else {
1517                tf = Typeface.create(tf, style);
1518            }
1519
1520            setTypeface(tf);
1521            // now compute what (if any) algorithmic styling is needed
1522            int typefaceStyle = tf != null ? tf.getStyle() : 0;
1523            int need = style & ~typefaceStyle;
1524            mTextPaint.setFakeBoldText((need & Typeface.BOLD) != 0);
1525            mTextPaint.setTextSkewX((need & Typeface.ITALIC) != 0 ? -0.25f : 0);
1526        } else {
1527            mTextPaint.setFakeBoldText(false);
1528            mTextPaint.setTextSkewX(0);
1529            setTypeface(tf);
1530        }
1531    }
1532
1533    /**
1534     * Subclasses override this to specify that they have a KeyListener
1535     * by default even if not specifically called for in the XML options.
1536     */
1537    protected boolean getDefaultEditable() {
1538        return false;
1539    }
1540
1541    /**
1542     * Subclasses override this to specify a default movement method.
1543     */
1544    protected MovementMethod getDefaultMovementMethod() {
1545        return null;
1546    }
1547
1548    /**
1549     * Return the text the TextView is displaying. If setText() was called with
1550     * an argument of BufferType.SPANNABLE or BufferType.EDITABLE, you can cast
1551     * the return value from this method to Spannable or Editable, respectively.
1552     *
1553     * Note: The content of the return value should not be modified. If you want
1554     * a modifiable one, you should make your own copy first.
1555     *
1556     * @attr ref android.R.styleable#TextView_text
1557     */
1558    @ViewDebug.CapturedViewProperty
1559    public CharSequence getText() {
1560        return mText;
1561    }
1562
1563    /**
1564     * Returns the length, in characters, of the text managed by this TextView
1565     */
1566    public int length() {
1567        return mText.length();
1568    }
1569
1570    /**
1571     * Return the text the TextView is displaying as an Editable object.  If
1572     * the text is not editable, null is returned.
1573     *
1574     * @see #getText
1575     */
1576    public Editable getEditableText() {
1577        return (mText instanceof Editable) ? (Editable)mText : null;
1578    }
1579
1580    /**
1581     * @return the height of one standard line in pixels.  Note that markup
1582     * within the text can cause individual lines to be taller or shorter
1583     * than this height, and the layout may contain additional first-
1584     * or last-line padding.
1585     */
1586    public int getLineHeight() {
1587        return FastMath.round(mTextPaint.getFontMetricsInt(null) * mSpacingMult + mSpacingAdd);
1588    }
1589
1590    /**
1591     * @return the Layout that is currently being used to display the text.
1592     * This can be null if the text or width has recently changes.
1593     */
1594    public final Layout getLayout() {
1595        return mLayout;
1596    }
1597
1598    /**
1599     * @return the Layout that is currently being used to display the hint text.
1600     * This can be null.
1601     */
1602    final Layout getHintLayout() {
1603        return mHintLayout;
1604    }
1605
1606    /**
1607     * Retrieve the {@link android.content.UndoManager} that is currently associated
1608     * with this TextView.  By default there is no associated UndoManager, so null
1609     * is returned.  One can be associated with the TextView through
1610     * {@link #setUndoManager(android.content.UndoManager, String)}
1611     *
1612     * @hide
1613     */
1614    public final UndoManager getUndoManager() {
1615        return mEditor == null ? null : mEditor.mUndoManager;
1616    }
1617
1618    /**
1619     * Associate an {@link android.content.UndoManager} with this TextView.  Once
1620     * done, all edit operations on the TextView will result in appropriate
1621     * {@link android.content.UndoOperation} objects pushed on the given UndoManager's
1622     * stack.
1623     *
1624     * @param undoManager The {@link android.content.UndoManager} to associate with
1625     * this TextView, or null to clear any existing association.
1626     * @param tag String tag identifying this particular TextView owner in the
1627     * UndoManager.  This is used to keep the correct association with the
1628     * {@link android.content.UndoOwner} of any operations inside of the UndoManager.
1629     *
1630     * @hide
1631     */
1632    public final void setUndoManager(UndoManager undoManager, String tag) {
1633        if (undoManager != null) {
1634            createEditorIfNeeded();
1635            mEditor.mUndoManager = undoManager;
1636            mEditor.mUndoOwner = undoManager.getOwner(tag, this);
1637            mEditor.mUndoInputFilter = new Editor.UndoInputFilter(mEditor);
1638            if (!(mText instanceof Editable)) {
1639                setText(mText, BufferType.EDITABLE);
1640            }
1641
1642            setFilters((Editable) mText, mFilters);
1643        } else if (mEditor != null) {
1644            // XXX need to destroy all associated state.
1645            mEditor.mUndoManager = null;
1646            mEditor.mUndoOwner = null;
1647            mEditor.mUndoInputFilter = null;
1648        }
1649    }
1650
1651    /**
1652     * @return the current key listener for this TextView.
1653     * This will frequently be null for non-EditText TextViews.
1654     *
1655     * @attr ref android.R.styleable#TextView_numeric
1656     * @attr ref android.R.styleable#TextView_digits
1657     * @attr ref android.R.styleable#TextView_phoneNumber
1658     * @attr ref android.R.styleable#TextView_inputMethod
1659     * @attr ref android.R.styleable#TextView_capitalize
1660     * @attr ref android.R.styleable#TextView_autoText
1661     */
1662    public final KeyListener getKeyListener() {
1663        return mEditor == null ? null : mEditor.mKeyListener;
1664    }
1665
1666    /**
1667     * Sets the key listener to be used with this TextView.  This can be null
1668     * to disallow user input.  Note that this method has significant and
1669     * subtle interactions with soft keyboards and other input method:
1670     * see {@link KeyListener#getInputType() KeyListener.getContentType()}
1671     * for important details.  Calling this method will replace the current
1672     * content type of the text view with the content type returned by the
1673     * key listener.
1674     * <p>
1675     * Be warned that if you want a TextView with a key listener or movement
1676     * method not to be focusable, or if you want a TextView without a
1677     * key listener or movement method to be focusable, you must call
1678     * {@link #setFocusable} again after calling this to get the focusability
1679     * back the way you want it.
1680     *
1681     * @attr ref android.R.styleable#TextView_numeric
1682     * @attr ref android.R.styleable#TextView_digits
1683     * @attr ref android.R.styleable#TextView_phoneNumber
1684     * @attr ref android.R.styleable#TextView_inputMethod
1685     * @attr ref android.R.styleable#TextView_capitalize
1686     * @attr ref android.R.styleable#TextView_autoText
1687     */
1688    public void setKeyListener(KeyListener input) {
1689        setKeyListenerOnly(input);
1690        fixFocusableAndClickableSettings();
1691
1692        if (input != null) {
1693            createEditorIfNeeded();
1694            try {
1695                mEditor.mInputType = mEditor.mKeyListener.getInputType();
1696            } catch (IncompatibleClassChangeError e) {
1697                mEditor.mInputType = EditorInfo.TYPE_CLASS_TEXT;
1698            }
1699            // Change inputType, without affecting transformation.
1700            // No need to applySingleLine since mSingleLine is unchanged.
1701            setInputTypeSingleLine(mSingleLine);
1702        } else {
1703            if (mEditor != null) mEditor.mInputType = EditorInfo.TYPE_NULL;
1704        }
1705
1706        InputMethodManager imm = InputMethodManager.peekInstance();
1707        if (imm != null) imm.restartInput(this);
1708    }
1709
1710    private void setKeyListenerOnly(KeyListener input) {
1711        if (mEditor == null && input == null) return; // null is the default value
1712
1713        createEditorIfNeeded();
1714        if (mEditor.mKeyListener != input) {
1715            mEditor.mKeyListener = input;
1716            if (input != null && !(mText instanceof Editable)) {
1717                setText(mText);
1718            }
1719
1720            setFilters((Editable) mText, mFilters);
1721        }
1722    }
1723
1724    /**
1725     * @return the movement method being used for this TextView.
1726     * This will frequently be null for non-EditText TextViews.
1727     */
1728    public final MovementMethod getMovementMethod() {
1729        return mMovement;
1730    }
1731
1732    /**
1733     * Sets the movement method (arrow key handler) to be used for
1734     * this TextView.  This can be null to disallow using the arrow keys
1735     * to move the cursor or scroll the view.
1736     * <p>
1737     * Be warned that if you want a TextView with a key listener or movement
1738     * method not to be focusable, or if you want a TextView without a
1739     * key listener or movement method to be focusable, you must call
1740     * {@link #setFocusable} again after calling this to get the focusability
1741     * back the way you want it.
1742     */
1743    public final void setMovementMethod(MovementMethod movement) {
1744        if (mMovement != movement) {
1745            mMovement = movement;
1746
1747            if (movement != null && !(mText instanceof Spannable)) {
1748                setText(mText);
1749            }
1750
1751            fixFocusableAndClickableSettings();
1752
1753            // SelectionModifierCursorController depends on textCanBeSelected, which depends on
1754            // mMovement
1755            if (mEditor != null) mEditor.prepareCursorControllers();
1756        }
1757    }
1758
1759    private void fixFocusableAndClickableSettings() {
1760        if (mMovement != null || (mEditor != null && mEditor.mKeyListener != null)) {
1761            setFocusable(true);
1762            setClickable(true);
1763            setLongClickable(true);
1764        } else {
1765            setFocusable(false);
1766            setClickable(false);
1767            setLongClickable(false);
1768        }
1769    }
1770
1771    /**
1772     * @return the current transformation method for this TextView.
1773     * This will frequently be null except for single-line and password
1774     * fields.
1775     *
1776     * @attr ref android.R.styleable#TextView_password
1777     * @attr ref android.R.styleable#TextView_singleLine
1778     */
1779    public final TransformationMethod getTransformationMethod() {
1780        return mTransformation;
1781    }
1782
1783    /**
1784     * Sets the transformation that is applied to the text that this
1785     * TextView is displaying.
1786     *
1787     * @attr ref android.R.styleable#TextView_password
1788     * @attr ref android.R.styleable#TextView_singleLine
1789     */
1790    public final void setTransformationMethod(TransformationMethod method) {
1791        if (method == mTransformation) {
1792            // Avoid the setText() below if the transformation is
1793            // the same.
1794            return;
1795        }
1796        if (mTransformation != null) {
1797            if (mText instanceof Spannable) {
1798                ((Spannable) mText).removeSpan(mTransformation);
1799            }
1800        }
1801
1802        mTransformation = method;
1803
1804        if (method instanceof TransformationMethod2) {
1805            TransformationMethod2 method2 = (TransformationMethod2) method;
1806            mAllowTransformationLengthChange = !isTextSelectable() && !(mText instanceof Editable);
1807            method2.setLengthChangesAllowed(mAllowTransformationLengthChange);
1808        } else {
1809            mAllowTransformationLengthChange = false;
1810        }
1811
1812        setText(mText);
1813
1814        if (hasPasswordTransformationMethod()) {
1815            notifyViewAccessibilityStateChangedIfNeeded(
1816                    AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED);
1817        }
1818    }
1819
1820    /**
1821     * Returns the top padding of the view, plus space for the top
1822     * Drawable if any.
1823     */
1824    public int getCompoundPaddingTop() {
1825        final Drawables dr = mDrawables;
1826        if (dr == null || dr.mShowing[Drawables.TOP] == null) {
1827            return mPaddingTop;
1828        } else {
1829            return mPaddingTop + dr.mDrawablePadding + dr.mDrawableSizeTop;
1830        }
1831    }
1832
1833    /**
1834     * Returns the bottom padding of the view, plus space for the bottom
1835     * Drawable if any.
1836     */
1837    public int getCompoundPaddingBottom() {
1838        final Drawables dr = mDrawables;
1839        if (dr == null || dr.mShowing[Drawables.BOTTOM] == null) {
1840            return mPaddingBottom;
1841        } else {
1842            return mPaddingBottom + dr.mDrawablePadding + dr.mDrawableSizeBottom;
1843        }
1844    }
1845
1846    /**
1847     * Returns the left padding of the view, plus space for the left
1848     * Drawable if any.
1849     */
1850    public int getCompoundPaddingLeft() {
1851        final Drawables dr = mDrawables;
1852        if (dr == null || dr.mShowing[Drawables.LEFT] == null) {
1853            return mPaddingLeft;
1854        } else {
1855            return mPaddingLeft + dr.mDrawablePadding + dr.mDrawableSizeLeft;
1856        }
1857    }
1858
1859    /**
1860     * Returns the right padding of the view, plus space for the right
1861     * Drawable if any.
1862     */
1863    public int getCompoundPaddingRight() {
1864        final Drawables dr = mDrawables;
1865        if (dr == null || dr.mShowing[Drawables.RIGHT] == null) {
1866            return mPaddingRight;
1867        } else {
1868            return mPaddingRight + dr.mDrawablePadding + dr.mDrawableSizeRight;
1869        }
1870    }
1871
1872    /**
1873     * Returns the start padding of the view, plus space for the start
1874     * Drawable if any.
1875     */
1876    public int getCompoundPaddingStart() {
1877        resolveDrawables();
1878        switch(getLayoutDirection()) {
1879            default:
1880            case LAYOUT_DIRECTION_LTR:
1881                return getCompoundPaddingLeft();
1882            case LAYOUT_DIRECTION_RTL:
1883                return getCompoundPaddingRight();
1884        }
1885    }
1886
1887    /**
1888     * Returns the end padding of the view, plus space for the end
1889     * Drawable if any.
1890     */
1891    public int getCompoundPaddingEnd() {
1892        resolveDrawables();
1893        switch(getLayoutDirection()) {
1894            default:
1895            case LAYOUT_DIRECTION_LTR:
1896                return getCompoundPaddingRight();
1897            case LAYOUT_DIRECTION_RTL:
1898                return getCompoundPaddingLeft();
1899        }
1900    }
1901
1902    /**
1903     * Returns the extended top padding of the view, including both the
1904     * top Drawable if any and any extra space to keep more than maxLines
1905     * of text from showing.  It is only valid to call this after measuring.
1906     */
1907    public int getExtendedPaddingTop() {
1908        if (mMaxMode != LINES) {
1909            return getCompoundPaddingTop();
1910        }
1911
1912        if (mLayout == null) {
1913            assumeLayout();
1914        }
1915
1916        if (mLayout.getLineCount() <= mMaximum) {
1917            return getCompoundPaddingTop();
1918        }
1919
1920        int top = getCompoundPaddingTop();
1921        int bottom = getCompoundPaddingBottom();
1922        int viewht = getHeight() - top - bottom;
1923        int layoutht = mLayout.getLineTop(mMaximum);
1924
1925        if (layoutht >= viewht) {
1926            return top;
1927        }
1928
1929        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1930        if (gravity == Gravity.TOP) {
1931            return top;
1932        } else if (gravity == Gravity.BOTTOM) {
1933            return top + viewht - layoutht;
1934        } else { // (gravity == Gravity.CENTER_VERTICAL)
1935            return top + (viewht - layoutht) / 2;
1936        }
1937    }
1938
1939    /**
1940     * Returns the extended bottom padding of the view, including both the
1941     * bottom Drawable if any and any extra space to keep more than maxLines
1942     * of text from showing.  It is only valid to call this after measuring.
1943     */
1944    public int getExtendedPaddingBottom() {
1945        if (mMaxMode != LINES) {
1946            return getCompoundPaddingBottom();
1947        }
1948
1949        if (mLayout == null) {
1950            assumeLayout();
1951        }
1952
1953        if (mLayout.getLineCount() <= mMaximum) {
1954            return getCompoundPaddingBottom();
1955        }
1956
1957        int top = getCompoundPaddingTop();
1958        int bottom = getCompoundPaddingBottom();
1959        int viewht = getHeight() - top - bottom;
1960        int layoutht = mLayout.getLineTop(mMaximum);
1961
1962        if (layoutht >= viewht) {
1963            return bottom;
1964        }
1965
1966        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
1967        if (gravity == Gravity.TOP) {
1968            return bottom + viewht - layoutht;
1969        } else if (gravity == Gravity.BOTTOM) {
1970            return bottom;
1971        } else { // (gravity == Gravity.CENTER_VERTICAL)
1972            return bottom + (viewht - layoutht) / 2;
1973        }
1974    }
1975
1976    /**
1977     * Returns the total left padding of the view, including the left
1978     * Drawable if any.
1979     */
1980    public int getTotalPaddingLeft() {
1981        return getCompoundPaddingLeft();
1982    }
1983
1984    /**
1985     * Returns the total right padding of the view, including the right
1986     * Drawable if any.
1987     */
1988    public int getTotalPaddingRight() {
1989        return getCompoundPaddingRight();
1990    }
1991
1992    /**
1993     * Returns the total start padding of the view, including the start
1994     * Drawable if any.
1995     */
1996    public int getTotalPaddingStart() {
1997        return getCompoundPaddingStart();
1998    }
1999
2000    /**
2001     * Returns the total end padding of the view, including the end
2002     * Drawable if any.
2003     */
2004    public int getTotalPaddingEnd() {
2005        return getCompoundPaddingEnd();
2006    }
2007
2008    /**
2009     * Returns the total top padding of the view, including the top
2010     * Drawable if any, the extra space to keep more than maxLines
2011     * from showing, and the vertical offset for gravity, if any.
2012     */
2013    public int getTotalPaddingTop() {
2014        return getExtendedPaddingTop() + getVerticalOffset(true);
2015    }
2016
2017    /**
2018     * Returns the total bottom padding of the view, including the bottom
2019     * Drawable if any, the extra space to keep more than maxLines
2020     * from showing, and the vertical offset for gravity, if any.
2021     */
2022    public int getTotalPaddingBottom() {
2023        return getExtendedPaddingBottom() + getBottomVerticalOffset(true);
2024    }
2025
2026    /**
2027     * Sets the Drawables (if any) to appear to the left of, above, to the
2028     * right of, and below the text. Use {@code null} if you do not want a
2029     * Drawable there. The Drawables must already have had
2030     * {@link Drawable#setBounds} called.
2031     * <p>
2032     * Calling this method will overwrite any Drawables previously set using
2033     * {@link #setCompoundDrawablesRelative} or related methods.
2034     *
2035     * @attr ref android.R.styleable#TextView_drawableLeft
2036     * @attr ref android.R.styleable#TextView_drawableTop
2037     * @attr ref android.R.styleable#TextView_drawableRight
2038     * @attr ref android.R.styleable#TextView_drawableBottom
2039     */
2040    public void setCompoundDrawables(@Nullable Drawable left, @Nullable Drawable top,
2041            @Nullable Drawable right, @Nullable Drawable bottom) {
2042        Drawables dr = mDrawables;
2043
2044        // We're switching to absolute, discard relative.
2045        if (dr != null) {
2046            if (dr.mDrawableStart != null) dr.mDrawableStart.setCallback(null);
2047            dr.mDrawableStart = null;
2048            if (dr.mDrawableEnd != null) dr.mDrawableEnd.setCallback(null);
2049            dr.mDrawableEnd = null;
2050            dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
2051            dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
2052        }
2053
2054        final boolean drawables = left != null || top != null || right != null || bottom != null;
2055        if (!drawables) {
2056            // Clearing drawables...  can we free the data structure?
2057            if (dr != null) {
2058                if (dr.mDrawablePadding == 0) {
2059                    mDrawables = null;
2060                } else {
2061                    // We need to retain the last set padding, so just clear
2062                    // out all of the fields in the existing structure.
2063                    for (int i = dr.mShowing.length - 1; i >= 0; i--) {
2064                        if (dr.mShowing[i] != null) {
2065                            dr.mShowing[i].setCallback(null);
2066                        }
2067                        dr.mShowing[i] = null;
2068                    }
2069                    dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
2070                    dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
2071                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
2072                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
2073                }
2074            }
2075        } else {
2076            if (dr == null) {
2077                mDrawables = dr = new Drawables(getContext());
2078            }
2079
2080            mDrawables.mOverride = false;
2081
2082            if (dr.mShowing[Drawables.LEFT] != left && dr.mShowing[Drawables.LEFT] != null) {
2083                dr.mShowing[Drawables.LEFT].setCallback(null);
2084            }
2085            dr.mShowing[Drawables.LEFT] = left;
2086
2087            if (dr.mShowing[Drawables.TOP] != top && dr.mShowing[Drawables.TOP] != null) {
2088                dr.mShowing[Drawables.TOP].setCallback(null);
2089            }
2090            dr.mShowing[Drawables.TOP] = top;
2091
2092            if (dr.mShowing[Drawables.RIGHT] != right && dr.mShowing[Drawables.RIGHT] != null) {
2093                dr.mShowing[Drawables.RIGHT].setCallback(null);
2094            }
2095            dr.mShowing[Drawables.RIGHT] = right;
2096
2097            if (dr.mShowing[Drawables.BOTTOM] != bottom && dr.mShowing[Drawables.BOTTOM] != null) {
2098                dr.mShowing[Drawables.BOTTOM].setCallback(null);
2099            }
2100            dr.mShowing[Drawables.BOTTOM] = bottom;
2101
2102            final Rect compoundRect = dr.mCompoundRect;
2103            int[] state;
2104
2105            state = getDrawableState();
2106
2107            if (left != null) {
2108                left.setState(state);
2109                left.copyBounds(compoundRect);
2110                left.setCallback(this);
2111                dr.mDrawableSizeLeft = compoundRect.width();
2112                dr.mDrawableHeightLeft = compoundRect.height();
2113            } else {
2114                dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
2115            }
2116
2117            if (right != null) {
2118                right.setState(state);
2119                right.copyBounds(compoundRect);
2120                right.setCallback(this);
2121                dr.mDrawableSizeRight = compoundRect.width();
2122                dr.mDrawableHeightRight = compoundRect.height();
2123            } else {
2124                dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
2125            }
2126
2127            if (top != null) {
2128                top.setState(state);
2129                top.copyBounds(compoundRect);
2130                top.setCallback(this);
2131                dr.mDrawableSizeTop = compoundRect.height();
2132                dr.mDrawableWidthTop = compoundRect.width();
2133            } else {
2134                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
2135            }
2136
2137            if (bottom != null) {
2138                bottom.setState(state);
2139                bottom.copyBounds(compoundRect);
2140                bottom.setCallback(this);
2141                dr.mDrawableSizeBottom = compoundRect.height();
2142                dr.mDrawableWidthBottom = compoundRect.width();
2143            } else {
2144                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
2145            }
2146        }
2147
2148        // Save initial left/right drawables
2149        if (dr != null) {
2150            dr.mDrawableLeftInitial = left;
2151            dr.mDrawableRightInitial = right;
2152        }
2153
2154        resetResolvedDrawables();
2155        resolveDrawables();
2156        applyCompoundDrawableTint();
2157        invalidate();
2158        requestLayout();
2159    }
2160
2161    /**
2162     * Sets the Drawables (if any) to appear to the left of, above, to the
2163     * right of, and below the text. Use 0 if you do not want a Drawable there.
2164     * The Drawables' bounds will be set to their intrinsic bounds.
2165     * <p>
2166     * Calling this method will overwrite any Drawables previously set using
2167     * {@link #setCompoundDrawablesRelative} or related methods.
2168     *
2169     * @param left Resource identifier of the left Drawable.
2170     * @param top Resource identifier of the top Drawable.
2171     * @param right Resource identifier of the right Drawable.
2172     * @param bottom Resource identifier of the bottom Drawable.
2173     *
2174     * @attr ref android.R.styleable#TextView_drawableLeft
2175     * @attr ref android.R.styleable#TextView_drawableTop
2176     * @attr ref android.R.styleable#TextView_drawableRight
2177     * @attr ref android.R.styleable#TextView_drawableBottom
2178     */
2179    @android.view.RemotableViewMethod
2180    public void setCompoundDrawablesWithIntrinsicBounds(@DrawableRes int left,
2181            @DrawableRes int top, @DrawableRes int right, @DrawableRes int bottom) {
2182        final Context context = getContext();
2183        setCompoundDrawablesWithIntrinsicBounds(left != 0 ? context.getDrawable(left) : null,
2184                top != 0 ? context.getDrawable(top) : null,
2185                right != 0 ? context.getDrawable(right) : null,
2186                bottom != 0 ? context.getDrawable(bottom) : null);
2187    }
2188
2189    /**
2190     * Sets the Drawables (if any) to appear to the left of, above, to the
2191     * right of, and below the text. Use {@code null} if you do not want a
2192     * Drawable there. The Drawables' bounds will be set to their intrinsic
2193     * bounds.
2194     * <p>
2195     * Calling this method will overwrite any Drawables previously set using
2196     * {@link #setCompoundDrawablesRelative} or related methods.
2197     *
2198     * @attr ref android.R.styleable#TextView_drawableLeft
2199     * @attr ref android.R.styleable#TextView_drawableTop
2200     * @attr ref android.R.styleable#TextView_drawableRight
2201     * @attr ref android.R.styleable#TextView_drawableBottom
2202     */
2203    public void setCompoundDrawablesWithIntrinsicBounds(@Nullable Drawable left,
2204            @Nullable Drawable top, @Nullable Drawable right, @Nullable Drawable bottom) {
2205
2206        if (left != null) {
2207            left.setBounds(0, 0, left.getIntrinsicWidth(), left.getIntrinsicHeight());
2208        }
2209        if (right != null) {
2210            right.setBounds(0, 0, right.getIntrinsicWidth(), right.getIntrinsicHeight());
2211        }
2212        if (top != null) {
2213            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
2214        }
2215        if (bottom != null) {
2216            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
2217        }
2218        setCompoundDrawables(left, top, right, bottom);
2219    }
2220
2221    /**
2222     * Sets the Drawables (if any) to appear to the start of, above, to the end
2223     * of, and below the text. Use {@code null} if you do not want a Drawable
2224     * there. The Drawables must already have had {@link Drawable#setBounds}
2225     * called.
2226     * <p>
2227     * Calling this method will overwrite any Drawables previously set using
2228     * {@link #setCompoundDrawables} or related methods.
2229     *
2230     * @attr ref android.R.styleable#TextView_drawableStart
2231     * @attr ref android.R.styleable#TextView_drawableTop
2232     * @attr ref android.R.styleable#TextView_drawableEnd
2233     * @attr ref android.R.styleable#TextView_drawableBottom
2234     */
2235    public void setCompoundDrawablesRelative(@Nullable Drawable start, @Nullable Drawable top,
2236            @Nullable Drawable end, @Nullable Drawable bottom) {
2237        Drawables dr = mDrawables;
2238
2239        // We're switching to relative, discard absolute.
2240        if (dr != null) {
2241            if (dr.mShowing[Drawables.LEFT] != null) {
2242                dr.mShowing[Drawables.LEFT].setCallback(null);
2243            }
2244            dr.mShowing[Drawables.LEFT] = dr.mDrawableLeftInitial = null;
2245            if (dr.mShowing[Drawables.RIGHT] != null) {
2246                dr.mShowing[Drawables.RIGHT].setCallback(null);
2247            }
2248            dr.mShowing[Drawables.RIGHT] = dr.mDrawableRightInitial = null;
2249            dr.mDrawableSizeLeft = dr.mDrawableHeightLeft = 0;
2250            dr.mDrawableSizeRight = dr.mDrawableHeightRight = 0;
2251        }
2252
2253        final boolean drawables = start != null || top != null
2254                || end != null || bottom != null;
2255
2256        if (!drawables) {
2257            // Clearing drawables...  can we free the data structure?
2258            if (dr != null) {
2259                if (dr.mDrawablePadding == 0) {
2260                    mDrawables = null;
2261                } else {
2262                    // We need to retain the last set padding, so just clear
2263                    // out all of the fields in the existing structure.
2264                    if (dr.mDrawableStart != null) dr.mDrawableStart.setCallback(null);
2265                    dr.mDrawableStart = null;
2266                    if (dr.mShowing[Drawables.TOP] != null) {
2267                        dr.mShowing[Drawables.TOP].setCallback(null);
2268                    }
2269                    dr.mShowing[Drawables.TOP] = null;
2270                    if (dr.mDrawableEnd != null) {
2271                        dr.mDrawableEnd.setCallback(null);
2272                    }
2273                    dr.mDrawableEnd = null;
2274                    if (dr.mShowing[Drawables.BOTTOM] != null) {
2275                        dr.mShowing[Drawables.BOTTOM].setCallback(null);
2276                    }
2277                    dr.mShowing[Drawables.BOTTOM] = null;
2278                    dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
2279                    dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
2280                    dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
2281                    dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
2282                }
2283            }
2284        } else {
2285            if (dr == null) {
2286                mDrawables = dr = new Drawables(getContext());
2287            }
2288
2289            mDrawables.mOverride = true;
2290
2291            if (dr.mDrawableStart != start && dr.mDrawableStart != null) {
2292                dr.mDrawableStart.setCallback(null);
2293            }
2294            dr.mDrawableStart = start;
2295
2296            if (dr.mShowing[Drawables.TOP] != top && dr.mShowing[Drawables.TOP] != null) {
2297                dr.mShowing[Drawables.TOP].setCallback(null);
2298            }
2299            dr.mShowing[Drawables.TOP] = top;
2300
2301            if (dr.mDrawableEnd != end && dr.mDrawableEnd != null) {
2302                dr.mDrawableEnd.setCallback(null);
2303            }
2304            dr.mDrawableEnd = end;
2305
2306            if (dr.mShowing[Drawables.BOTTOM] != bottom && dr.mShowing[Drawables.BOTTOM] != null) {
2307                dr.mShowing[Drawables.BOTTOM].setCallback(null);
2308            }
2309            dr.mShowing[Drawables.BOTTOM] = bottom;
2310
2311            final Rect compoundRect = dr.mCompoundRect;
2312            int[] state;
2313
2314            state = getDrawableState();
2315
2316            if (start != null) {
2317                start.setState(state);
2318                start.copyBounds(compoundRect);
2319                start.setCallback(this);
2320                dr.mDrawableSizeStart = compoundRect.width();
2321                dr.mDrawableHeightStart = compoundRect.height();
2322            } else {
2323                dr.mDrawableSizeStart = dr.mDrawableHeightStart = 0;
2324            }
2325
2326            if (end != null) {
2327                end.setState(state);
2328                end.copyBounds(compoundRect);
2329                end.setCallback(this);
2330                dr.mDrawableSizeEnd = compoundRect.width();
2331                dr.mDrawableHeightEnd = compoundRect.height();
2332            } else {
2333                dr.mDrawableSizeEnd = dr.mDrawableHeightEnd = 0;
2334            }
2335
2336            if (top != null) {
2337                top.setState(state);
2338                top.copyBounds(compoundRect);
2339                top.setCallback(this);
2340                dr.mDrawableSizeTop = compoundRect.height();
2341                dr.mDrawableWidthTop = compoundRect.width();
2342            } else {
2343                dr.mDrawableSizeTop = dr.mDrawableWidthTop = 0;
2344            }
2345
2346            if (bottom != null) {
2347                bottom.setState(state);
2348                bottom.copyBounds(compoundRect);
2349                bottom.setCallback(this);
2350                dr.mDrawableSizeBottom = compoundRect.height();
2351                dr.mDrawableWidthBottom = compoundRect.width();
2352            } else {
2353                dr.mDrawableSizeBottom = dr.mDrawableWidthBottom = 0;
2354            }
2355        }
2356
2357        resetResolvedDrawables();
2358        resolveDrawables();
2359        invalidate();
2360        requestLayout();
2361    }
2362
2363    /**
2364     * Sets the Drawables (if any) to appear to the start of, above, to the end
2365     * of, and below the text. Use 0 if you do not want a Drawable there. The
2366     * Drawables' bounds will be set to their intrinsic bounds.
2367     * <p>
2368     * Calling this method will overwrite any Drawables previously set using
2369     * {@link #setCompoundDrawables} or related methods.
2370     *
2371     * @param start Resource identifier of the start Drawable.
2372     * @param top Resource identifier of the top Drawable.
2373     * @param end Resource identifier of the end Drawable.
2374     * @param bottom Resource identifier of the bottom Drawable.
2375     *
2376     * @attr ref android.R.styleable#TextView_drawableStart
2377     * @attr ref android.R.styleable#TextView_drawableTop
2378     * @attr ref android.R.styleable#TextView_drawableEnd
2379     * @attr ref android.R.styleable#TextView_drawableBottom
2380     */
2381    @android.view.RemotableViewMethod
2382    public void setCompoundDrawablesRelativeWithIntrinsicBounds(@DrawableRes int start,
2383            @DrawableRes int top, @DrawableRes int end, @DrawableRes int bottom) {
2384        final Context context = getContext();
2385        setCompoundDrawablesRelativeWithIntrinsicBounds(
2386                start != 0 ? context.getDrawable(start) : null,
2387                top != 0 ? context.getDrawable(top) : null,
2388                end != 0 ? context.getDrawable(end) : null,
2389                bottom != 0 ? context.getDrawable(bottom) : null);
2390    }
2391
2392    /**
2393     * Sets the Drawables (if any) to appear to the start of, above, to the end
2394     * of, and below the text. Use {@code null} if you do not want a Drawable
2395     * there. The Drawables' bounds will be set to their intrinsic bounds.
2396     * <p>
2397     * Calling this method will overwrite any Drawables previously set using
2398     * {@link #setCompoundDrawables} or related methods.
2399     *
2400     * @attr ref android.R.styleable#TextView_drawableStart
2401     * @attr ref android.R.styleable#TextView_drawableTop
2402     * @attr ref android.R.styleable#TextView_drawableEnd
2403     * @attr ref android.R.styleable#TextView_drawableBottom
2404     */
2405    public void setCompoundDrawablesRelativeWithIntrinsicBounds(@Nullable Drawable start,
2406            @Nullable Drawable top, @Nullable Drawable end, @Nullable Drawable bottom) {
2407
2408        if (start != null) {
2409            start.setBounds(0, 0, start.getIntrinsicWidth(), start.getIntrinsicHeight());
2410        }
2411        if (end != null) {
2412            end.setBounds(0, 0, end.getIntrinsicWidth(), end.getIntrinsicHeight());
2413        }
2414        if (top != null) {
2415            top.setBounds(0, 0, top.getIntrinsicWidth(), top.getIntrinsicHeight());
2416        }
2417        if (bottom != null) {
2418            bottom.setBounds(0, 0, bottom.getIntrinsicWidth(), bottom.getIntrinsicHeight());
2419        }
2420        setCompoundDrawablesRelative(start, top, end, bottom);
2421    }
2422
2423    /**
2424     * Returns drawables for the left, top, right, and bottom borders.
2425     *
2426     * @attr ref android.R.styleable#TextView_drawableLeft
2427     * @attr ref android.R.styleable#TextView_drawableTop
2428     * @attr ref android.R.styleable#TextView_drawableRight
2429     * @attr ref android.R.styleable#TextView_drawableBottom
2430     */
2431    @NonNull
2432    public Drawable[] getCompoundDrawables() {
2433        final Drawables dr = mDrawables;
2434        if (dr != null) {
2435            return dr.mShowing.clone();
2436        } else {
2437            return new Drawable[] { null, null, null, null };
2438        }
2439    }
2440
2441    /**
2442     * Returns drawables for the start, top, end, and bottom borders.
2443     *
2444     * @attr ref android.R.styleable#TextView_drawableStart
2445     * @attr ref android.R.styleable#TextView_drawableTop
2446     * @attr ref android.R.styleable#TextView_drawableEnd
2447     * @attr ref android.R.styleable#TextView_drawableBottom
2448     */
2449    @NonNull
2450    public Drawable[] getCompoundDrawablesRelative() {
2451        final Drawables dr = mDrawables;
2452        if (dr != null) {
2453            return new Drawable[] {
2454                dr.mDrawableStart, dr.mShowing[Drawables.TOP],
2455                dr.mDrawableEnd, dr.mShowing[Drawables.BOTTOM]
2456            };
2457        } else {
2458            return new Drawable[] { null, null, null, null };
2459        }
2460    }
2461
2462    /**
2463     * Sets the size of the padding between the compound drawables and
2464     * the text.
2465     *
2466     * @attr ref android.R.styleable#TextView_drawablePadding
2467     */
2468    @android.view.RemotableViewMethod
2469    public void setCompoundDrawablePadding(int pad) {
2470        Drawables dr = mDrawables;
2471        if (pad == 0) {
2472            if (dr != null) {
2473                dr.mDrawablePadding = pad;
2474            }
2475        } else {
2476            if (dr == null) {
2477                mDrawables = dr = new Drawables(getContext());
2478            }
2479            dr.mDrawablePadding = pad;
2480        }
2481
2482        invalidate();
2483        requestLayout();
2484    }
2485
2486    /**
2487     * Returns the padding between the compound drawables and the text.
2488     *
2489     * @attr ref android.R.styleable#TextView_drawablePadding
2490     */
2491    public int getCompoundDrawablePadding() {
2492        final Drawables dr = mDrawables;
2493        return dr != null ? dr.mDrawablePadding : 0;
2494    }
2495
2496    /**
2497     * Applies a tint to the compound drawables. Does not modify the
2498     * current tint mode, which is {@link PorterDuff.Mode#SRC_IN} by default.
2499     * <p>
2500     * Subsequent calls to
2501     * {@link #setCompoundDrawables(Drawable, Drawable, Drawable, Drawable)}
2502     * and related methods will automatically mutate the drawables and apply
2503     * the specified tint and tint mode using
2504     * {@link Drawable#setTintList(ColorStateList)}.
2505     *
2506     * @param tint the tint to apply, may be {@code null} to clear tint
2507     *
2508     * @attr ref android.R.styleable#TextView_drawableTint
2509     * @see #getCompoundDrawableTintList()
2510     * @see Drawable#setTintList(ColorStateList)
2511     */
2512    public void setCompoundDrawableTintList(@Nullable ColorStateList tint) {
2513        if (mDrawables == null) {
2514            mDrawables = new Drawables(getContext());
2515        }
2516        mDrawables.mTintList = tint;
2517        mDrawables.mHasTint = true;
2518
2519        applyCompoundDrawableTint();
2520    }
2521
2522    /**
2523     * @return the tint applied to the compound drawables
2524     * @attr ref android.R.styleable#TextView_drawableTint
2525     * @see #setCompoundDrawableTintList(ColorStateList)
2526     */
2527    public ColorStateList getCompoundDrawableTintList() {
2528        return mDrawables != null ? mDrawables.mTintList : null;
2529    }
2530
2531    /**
2532     * Specifies the blending mode used to apply the tint specified by
2533     * {@link #setCompoundDrawableTintList(ColorStateList)} to the compound
2534     * drawables. The default mode is {@link PorterDuff.Mode#SRC_IN}.
2535     *
2536     * @param tintMode the blending mode used to apply the tint, may be
2537     *                 {@code null} to clear tint
2538     * @attr ref android.R.styleable#TextView_drawableTintMode
2539     * @see #setCompoundDrawableTintList(ColorStateList)
2540     * @see Drawable#setTintMode(PorterDuff.Mode)
2541     */
2542    public void setCompoundDrawableTintMode(@Nullable PorterDuff.Mode tintMode) {
2543        if (mDrawables == null) {
2544            mDrawables = new Drawables(getContext());
2545        }
2546        mDrawables.mTintMode = tintMode;
2547        mDrawables.mHasTintMode = true;
2548
2549        applyCompoundDrawableTint();
2550    }
2551
2552    /**
2553     * Returns the blending mode used to apply the tint to the compound
2554     * drawables, if specified.
2555     *
2556     * @return the blending mode used to apply the tint to the compound
2557     *         drawables
2558     * @attr ref android.R.styleable#TextView_drawableTintMode
2559     * @see #setCompoundDrawableTintMode(PorterDuff.Mode)
2560     */
2561    public PorterDuff.Mode getCompoundDrawableTintMode() {
2562        return mDrawables != null ? mDrawables.mTintMode : null;
2563    }
2564
2565    private void applyCompoundDrawableTint() {
2566        if (mDrawables == null) {
2567            return;
2568        }
2569
2570        if (mDrawables.mHasTint || mDrawables.mHasTintMode) {
2571            final ColorStateList tintList = mDrawables.mTintList;
2572            final PorterDuff.Mode tintMode = mDrawables.mTintMode;
2573            final boolean hasTint = mDrawables.mHasTint;
2574            final boolean hasTintMode = mDrawables.mHasTintMode;
2575            final int[] state = getDrawableState();
2576
2577            for (Drawable dr : mDrawables.mShowing) {
2578                if (dr == null) {
2579                    continue;
2580                }
2581
2582                if (dr == mDrawables.mDrawableError) {
2583                    // From a developer's perspective, the error drawable isn't
2584                    // a compound drawable. Don't apply the generic compound
2585                    // drawable tint to it.
2586                    continue;
2587                }
2588
2589                dr.mutate();
2590
2591                if (hasTint) {
2592                    dr.setTintList(tintList);
2593                }
2594
2595                if (hasTintMode) {
2596                    dr.setTintMode(tintMode);
2597                }
2598
2599                // The drawable (or one of its children) may not have been
2600                // stateful before applying the tint, so let's try again.
2601                if (dr.isStateful()) {
2602                    dr.setState(state);
2603                }
2604            }
2605        }
2606    }
2607
2608    @Override
2609    public void setPadding(int left, int top, int right, int bottom) {
2610        if (left != mPaddingLeft ||
2611            right != mPaddingRight ||
2612            top != mPaddingTop ||
2613            bottom != mPaddingBottom) {
2614            nullLayouts();
2615        }
2616
2617        // the super call will requestLayout()
2618        super.setPadding(left, top, right, bottom);
2619        invalidate();
2620    }
2621
2622    @Override
2623    public void setPaddingRelative(int start, int top, int end, int bottom) {
2624        if (start != getPaddingStart() ||
2625            end != getPaddingEnd() ||
2626            top != mPaddingTop ||
2627            bottom != mPaddingBottom) {
2628            nullLayouts();
2629        }
2630
2631        // the super call will requestLayout()
2632        super.setPaddingRelative(start, top, end, bottom);
2633        invalidate();
2634    }
2635
2636    /**
2637     * Gets the autolink mask of the text.  See {@link
2638     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
2639     * possible values.
2640     *
2641     * @attr ref android.R.styleable#TextView_autoLink
2642     */
2643    public final int getAutoLinkMask() {
2644        return mAutoLinkMask;
2645    }
2646
2647    /**
2648     * Sets the text color, size, style, hint color, and highlight color
2649     * from the specified TextAppearance resource.
2650     */
2651    public void setTextAppearance(Context context, @StyleRes int resid) {
2652        TypedArray appearance =
2653            context.obtainStyledAttributes(resid,
2654                                           com.android.internal.R.styleable.TextAppearance);
2655
2656        int color;
2657        ColorStateList colors;
2658        int ts;
2659
2660        color = appearance.getColor(
2661                com.android.internal.R.styleable.TextAppearance_textColorHighlight, 0);
2662        if (color != 0) {
2663            setHighlightColor(color);
2664        }
2665
2666        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2667                                              TextAppearance_textColor);
2668        if (colors != null) {
2669            setTextColor(colors);
2670        }
2671
2672        ts = appearance.getDimensionPixelSize(com.android.internal.R.styleable.
2673                                              TextAppearance_textSize, 0);
2674        if (ts != 0) {
2675            setRawTextSize(ts);
2676        }
2677
2678        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2679                                              TextAppearance_textColorHint);
2680        if (colors != null) {
2681            setHintTextColor(colors);
2682        }
2683
2684        colors = appearance.getColorStateList(com.android.internal.R.styleable.
2685                                              TextAppearance_textColorLink);
2686        if (colors != null) {
2687            setLinkTextColor(colors);
2688        }
2689
2690        String familyName;
2691        int typefaceIndex, styleIndex;
2692
2693        familyName = appearance.getString(com.android.internal.R.styleable.
2694                                          TextAppearance_fontFamily);
2695        typefaceIndex = appearance.getInt(com.android.internal.R.styleable.
2696                                          TextAppearance_typeface, -1);
2697        styleIndex = appearance.getInt(com.android.internal.R.styleable.
2698                                       TextAppearance_textStyle, -1);
2699
2700        setTypefaceFromAttrs(familyName, typefaceIndex, styleIndex);
2701
2702        final int shadowcolor = appearance.getInt(
2703                com.android.internal.R.styleable.TextAppearance_shadowColor, 0);
2704        if (shadowcolor != 0) {
2705            final float dx = appearance.getFloat(
2706                    com.android.internal.R.styleable.TextAppearance_shadowDx, 0);
2707            final float dy = appearance.getFloat(
2708                    com.android.internal.R.styleable.TextAppearance_shadowDy, 0);
2709            final float r = appearance.getFloat(
2710                    com.android.internal.R.styleable.TextAppearance_shadowRadius, 0);
2711
2712            setShadowLayer(r, dx, dy, shadowcolor);
2713        }
2714
2715        if (appearance.getBoolean(com.android.internal.R.styleable.TextAppearance_textAllCaps,
2716                false)) {
2717            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
2718        }
2719
2720        if (appearance.hasValue(com.android.internal.R.styleable.TextAppearance_elegantTextHeight)) {
2721            setElegantTextHeight(appearance.getBoolean(
2722                com.android.internal.R.styleable.TextAppearance_elegantTextHeight, false));
2723        }
2724
2725        if (appearance.hasValue(com.android.internal.R.styleable.TextAppearance_letterSpacing)) {
2726            setLetterSpacing(appearance.getFloat(
2727                com.android.internal.R.styleable.TextAppearance_letterSpacing, 0));
2728        }
2729
2730        if (appearance.hasValue(com.android.internal.R.styleable.TextAppearance_fontFeatureSettings)) {
2731            setFontFeatureSettings(appearance.getString(
2732                com.android.internal.R.styleable.TextAppearance_fontFeatureSettings));
2733        }
2734
2735        appearance.recycle();
2736    }
2737
2738    /**
2739     * Get the default {@link Locale} of the text in this TextView.
2740     * @return the default {@link Locale} of the text in this TextView.
2741     */
2742    public Locale getTextLocale() {
2743        return mTextPaint.getTextLocale();
2744    }
2745
2746    /**
2747     * Set the default {@link Locale} of the text in this TextView to the given value. This value
2748     * is used to choose appropriate typefaces for ambiguous characters. Typically used for CJK
2749     * locales to disambiguate Hanzi/Kanji/Hanja characters.
2750     *
2751     * @param locale the {@link Locale} for drawing text, must not be null.
2752     *
2753     * @see Paint#setTextLocale
2754     */
2755    public void setTextLocale(Locale locale) {
2756        mLocaleChanged = true;
2757        mTextPaint.setTextLocale(locale);
2758    }
2759
2760    @Override
2761    protected void onConfigurationChanged(Configuration newConfig) {
2762        super.onConfigurationChanged(newConfig);
2763        if (!mLocaleChanged) {
2764            mTextPaint.setTextLocale(Locale.getDefault());
2765        }
2766    }
2767
2768    /**
2769     * @return the size (in pixels) of the default text size in this TextView.
2770     */
2771    @ViewDebug.ExportedProperty(category = "text")
2772    public float getTextSize() {
2773        return mTextPaint.getTextSize();
2774    }
2775
2776    /**
2777     * @return the size (in scaled pixels) of thee default text size in this TextView.
2778     * @hide
2779     */
2780    @ViewDebug.ExportedProperty(category = "text")
2781    public float getScaledTextSize() {
2782        return mTextPaint.getTextSize() / mTextPaint.density;
2783    }
2784
2785    /** @hide */
2786    @ViewDebug.ExportedProperty(category = "text", mapping = {
2787            @ViewDebug.IntToString(from = Typeface.NORMAL, to = "NORMAL"),
2788            @ViewDebug.IntToString(from = Typeface.BOLD, to = "BOLD"),
2789            @ViewDebug.IntToString(from = Typeface.ITALIC, to = "ITALIC"),
2790            @ViewDebug.IntToString(from = Typeface.BOLD_ITALIC, to = "BOLD_ITALIC")
2791    })
2792    public int getTypefaceStyle() {
2793        return mTextPaint.getTypeface().getStyle();
2794    }
2795
2796    /**
2797     * Set the default text size to the given value, interpreted as "scaled
2798     * pixel" units.  This size is adjusted based on the current density and
2799     * user font size preference.
2800     *
2801     * @param size The scaled pixel size.
2802     *
2803     * @attr ref android.R.styleable#TextView_textSize
2804     */
2805    @android.view.RemotableViewMethod
2806    public void setTextSize(float size) {
2807        setTextSize(TypedValue.COMPLEX_UNIT_SP, size);
2808    }
2809
2810    /**
2811     * Set the default text size to a given unit and value.  See {@link
2812     * TypedValue} for the possible dimension units.
2813     *
2814     * @param unit The desired dimension unit.
2815     * @param size The desired size in the given units.
2816     *
2817     * @attr ref android.R.styleable#TextView_textSize
2818     */
2819    public void setTextSize(int unit, float size) {
2820        Context c = getContext();
2821        Resources r;
2822
2823        if (c == null)
2824            r = Resources.getSystem();
2825        else
2826            r = c.getResources();
2827
2828        setRawTextSize(TypedValue.applyDimension(
2829                unit, size, r.getDisplayMetrics()));
2830    }
2831
2832    private void setRawTextSize(float size) {
2833        if (size != mTextPaint.getTextSize()) {
2834            mTextPaint.setTextSize(size);
2835
2836            if (mLayout != null) {
2837                nullLayouts();
2838                requestLayout();
2839                invalidate();
2840            }
2841        }
2842    }
2843
2844    /**
2845     * @return the extent by which text is currently being stretched
2846     * horizontally.  This will usually be 1.
2847     */
2848    public float getTextScaleX() {
2849        return mTextPaint.getTextScaleX();
2850    }
2851
2852    /**
2853     * Sets the extent by which text should be stretched horizontally.
2854     *
2855     * @attr ref android.R.styleable#TextView_textScaleX
2856     */
2857    @android.view.RemotableViewMethod
2858    public void setTextScaleX(float size) {
2859        if (size != mTextPaint.getTextScaleX()) {
2860            mUserSetTextScaleX = true;
2861            mTextPaint.setTextScaleX(size);
2862
2863            if (mLayout != null) {
2864                nullLayouts();
2865                requestLayout();
2866                invalidate();
2867            }
2868        }
2869    }
2870
2871    /**
2872     * Sets the typeface and style in which the text should be displayed.
2873     * Note that not all Typeface families actually have bold and italic
2874     * variants, so you may need to use
2875     * {@link #setTypeface(Typeface, int)} to get the appearance
2876     * that you actually want.
2877     *
2878     * @see #getTypeface()
2879     *
2880     * @attr ref android.R.styleable#TextView_fontFamily
2881     * @attr ref android.R.styleable#TextView_typeface
2882     * @attr ref android.R.styleable#TextView_textStyle
2883     */
2884    public void setTypeface(Typeface tf) {
2885        if (mTextPaint.getTypeface() != tf) {
2886            mTextPaint.setTypeface(tf);
2887
2888            if (mLayout != null) {
2889                nullLayouts();
2890                requestLayout();
2891                invalidate();
2892            }
2893        }
2894    }
2895
2896    /**
2897     * @return the current typeface and style in which the text is being
2898     * displayed.
2899     *
2900     * @see #setTypeface(Typeface)
2901     *
2902     * @attr ref android.R.styleable#TextView_fontFamily
2903     * @attr ref android.R.styleable#TextView_typeface
2904     * @attr ref android.R.styleable#TextView_textStyle
2905     */
2906    public Typeface getTypeface() {
2907        return mTextPaint.getTypeface();
2908    }
2909
2910    /**
2911     * Set the TextView's elegant height metrics flag. This setting selects font
2912     * variants that have not been compacted to fit Latin-based vertical
2913     * metrics, and also increases top and bottom bounds to provide more space.
2914     *
2915     * @param elegant set the paint's elegant metrics flag.
2916     *
2917     * @attr ref android.R.styleable#TextView_elegantTextHeight
2918     */
2919    public void setElegantTextHeight(boolean elegant) {
2920        mTextPaint.setElegantTextHeight(elegant);
2921    }
2922
2923    /**
2924     * @return the extent by which text is currently being letter-spaced.
2925     * This will normally be 0.
2926     *
2927     * @see #setLetterSpacing(float)
2928     * @see Paint#setLetterSpacing
2929     */
2930    public float getLetterSpacing() {
2931        return mTextPaint.getLetterSpacing();
2932    }
2933
2934    /**
2935     * Sets text letter-spacing.  The value is in 'EM' units.  Typical values
2936     * for slight expansion will be around 0.05.  Negative values tighten text.
2937     *
2938     * @see #getLetterSpacing()
2939     * @see Paint#getLetterSpacing
2940     *
2941     * @attr ref android.R.styleable#TextView_letterSpacing
2942     */
2943    @android.view.RemotableViewMethod
2944    public void setLetterSpacing(float letterSpacing) {
2945        if (letterSpacing != mTextPaint.getLetterSpacing()) {
2946            mTextPaint.setLetterSpacing(letterSpacing);
2947
2948            if (mLayout != null) {
2949                nullLayouts();
2950                requestLayout();
2951                invalidate();
2952            }
2953        }
2954    }
2955
2956    /**
2957     * @return the currently set font feature settings.  Default is null.
2958     *
2959     * @see #setFontFeatureSettings(String)
2960     * @see Paint#setFontFeatureSettings
2961     */
2962    @Nullable
2963    public String getFontFeatureSettings() {
2964        return mTextPaint.getFontFeatureSettings();
2965    }
2966
2967    /**
2968     * Sets font feature settings.  The format is the same as the CSS
2969     * font-feature-settings attribute:
2970     * http://dev.w3.org/csswg/css-fonts/#propdef-font-feature-settings
2971     *
2972     * @param fontFeatureSettings font feature settings represented as CSS compatible string
2973     * @see #getFontFeatureSettings()
2974     * @see Paint#getFontFeatureSettings
2975     *
2976     * @attr ref android.R.styleable#TextView_fontFeatureSettings
2977     */
2978    @android.view.RemotableViewMethod
2979    public void setFontFeatureSettings(@Nullable String fontFeatureSettings) {
2980        if (fontFeatureSettings != mTextPaint.getFontFeatureSettings()) {
2981            mTextPaint.setFontFeatureSettings(fontFeatureSettings);
2982
2983            if (mLayout != null) {
2984                nullLayouts();
2985                requestLayout();
2986                invalidate();
2987            }
2988        }
2989    }
2990
2991
2992    /**
2993     * Sets the text color for all the states (normal, selected,
2994     * focused) to be this color.
2995     *
2996     * @see #setTextColor(ColorStateList)
2997     * @see #getTextColors()
2998     *
2999     * @attr ref android.R.styleable#TextView_textColor
3000     */
3001    @android.view.RemotableViewMethod
3002    public void setTextColor(int color) {
3003        mTextColor = ColorStateList.valueOf(color);
3004        updateTextColors();
3005    }
3006
3007    /**
3008     * Sets the text color.
3009     *
3010     * @see #setTextColor(int)
3011     * @see #getTextColors()
3012     * @see #setHintTextColor(ColorStateList)
3013     * @see #setLinkTextColor(ColorStateList)
3014     *
3015     * @attr ref android.R.styleable#TextView_textColor
3016     */
3017    public void setTextColor(ColorStateList colors) {
3018        if (colors == null) {
3019            throw new NullPointerException();
3020        }
3021
3022        mTextColor = colors;
3023        updateTextColors();
3024    }
3025
3026    /**
3027     * Gets the text colors for the different states (normal, selected, focused) of the TextView.
3028     *
3029     * @see #setTextColor(ColorStateList)
3030     * @see #setTextColor(int)
3031     *
3032     * @attr ref android.R.styleable#TextView_textColor
3033     */
3034    public final ColorStateList getTextColors() {
3035        return mTextColor;
3036    }
3037
3038    /**
3039     * <p>Return the current color selected for normal text.</p>
3040     *
3041     * @return Returns the current text color.
3042     */
3043    public final int getCurrentTextColor() {
3044        return mCurTextColor;
3045    }
3046
3047    /**
3048     * Sets the color used to display the selection highlight.
3049     *
3050     * @attr ref android.R.styleable#TextView_textColorHighlight
3051     */
3052    @android.view.RemotableViewMethod
3053    public void setHighlightColor(int color) {
3054        if (mHighlightColor != color) {
3055            mHighlightColor = color;
3056            invalidate();
3057        }
3058    }
3059
3060    /**
3061     * @return the color used to display the selection highlight
3062     *
3063     * @see #setHighlightColor(int)
3064     *
3065     * @attr ref android.R.styleable#TextView_textColorHighlight
3066     */
3067    public int getHighlightColor() {
3068        return mHighlightColor;
3069    }
3070
3071    /**
3072     * Sets whether the soft input method will be made visible when this
3073     * TextView gets focused. The default is true.
3074     */
3075    @android.view.RemotableViewMethod
3076    public final void setShowSoftInputOnFocus(boolean show) {
3077        createEditorIfNeeded();
3078        mEditor.mShowSoftInputOnFocus = show;
3079    }
3080
3081    /**
3082     * Returns whether the soft input method will be made visible when this
3083     * TextView gets focused. The default is true.
3084     */
3085    public final boolean getShowSoftInputOnFocus() {
3086        // When there is no Editor, return default true value
3087        return mEditor == null || mEditor.mShowSoftInputOnFocus;
3088    }
3089
3090    /**
3091     * Gives the text a shadow of the specified blur radius and color, the specified
3092     * distance from its drawn position.
3093     * <p>
3094     * The text shadow produced does not interact with the properties on view
3095     * that are responsible for real time shadows,
3096     * {@link View#getElevation() elevation} and
3097     * {@link View#getTranslationZ() translationZ}.
3098     *
3099     * @see Paint#setShadowLayer(float, float, float, int)
3100     *
3101     * @attr ref android.R.styleable#TextView_shadowColor
3102     * @attr ref android.R.styleable#TextView_shadowDx
3103     * @attr ref android.R.styleable#TextView_shadowDy
3104     * @attr ref android.R.styleable#TextView_shadowRadius
3105     */
3106    public void setShadowLayer(float radius, float dx, float dy, int color) {
3107        mTextPaint.setShadowLayer(radius, dx, dy, color);
3108
3109        mShadowRadius = radius;
3110        mShadowDx = dx;
3111        mShadowDy = dy;
3112        mShadowColor = color;
3113
3114        // Will change text clip region
3115        if (mEditor != null) mEditor.invalidateTextDisplayList();
3116        invalidate();
3117    }
3118
3119    /**
3120     * Gets the radius of the shadow layer.
3121     *
3122     * @return the radius of the shadow layer. If 0, the shadow layer is not visible
3123     *
3124     * @see #setShadowLayer(float, float, float, int)
3125     *
3126     * @attr ref android.R.styleable#TextView_shadowRadius
3127     */
3128    public float getShadowRadius() {
3129        return mShadowRadius;
3130    }
3131
3132    /**
3133     * @return the horizontal offset of the shadow layer
3134     *
3135     * @see #setShadowLayer(float, float, float, int)
3136     *
3137     * @attr ref android.R.styleable#TextView_shadowDx
3138     */
3139    public float getShadowDx() {
3140        return mShadowDx;
3141    }
3142
3143    /**
3144     * @return the vertical offset of the shadow layer
3145     *
3146     * @see #setShadowLayer(float, float, float, int)
3147     *
3148     * @attr ref android.R.styleable#TextView_shadowDy
3149     */
3150    public float getShadowDy() {
3151        return mShadowDy;
3152    }
3153
3154    /**
3155     * @return the color of the shadow layer
3156     *
3157     * @see #setShadowLayer(float, float, float, int)
3158     *
3159     * @attr ref android.R.styleable#TextView_shadowColor
3160     */
3161    public int getShadowColor() {
3162        return mShadowColor;
3163    }
3164
3165    /**
3166     * @return the base paint used for the text.  Please use this only to
3167     * consult the Paint's properties and not to change them.
3168     */
3169    public TextPaint getPaint() {
3170        return mTextPaint;
3171    }
3172
3173    /**
3174     * Sets the autolink mask of the text.  See {@link
3175     * android.text.util.Linkify#ALL Linkify.ALL} and peers for
3176     * possible values.
3177     *
3178     * @attr ref android.R.styleable#TextView_autoLink
3179     */
3180    @android.view.RemotableViewMethod
3181    public final void setAutoLinkMask(int mask) {
3182        mAutoLinkMask = mask;
3183    }
3184
3185    /**
3186     * Sets whether the movement method will automatically be set to
3187     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
3188     * set to nonzero and links are detected in {@link #setText}.
3189     * The default is true.
3190     *
3191     * @attr ref android.R.styleable#TextView_linksClickable
3192     */
3193    @android.view.RemotableViewMethod
3194    public final void setLinksClickable(boolean whether) {
3195        mLinksClickable = whether;
3196    }
3197
3198    /**
3199     * Returns whether the movement method will automatically be set to
3200     * {@link LinkMovementMethod} if {@link #setAutoLinkMask} has been
3201     * set to nonzero and links are detected in {@link #setText}.
3202     * The default is true.
3203     *
3204     * @attr ref android.R.styleable#TextView_linksClickable
3205     */
3206    public final boolean getLinksClickable() {
3207        return mLinksClickable;
3208    }
3209
3210    /**
3211     * Returns the list of URLSpans attached to the text
3212     * (by {@link Linkify} or otherwise) if any.  You can call
3213     * {@link URLSpan#getURL} on them to find where they link to
3214     * or use {@link Spanned#getSpanStart} and {@link Spanned#getSpanEnd}
3215     * to find the region of the text they are attached to.
3216     */
3217    public URLSpan[] getUrls() {
3218        if (mText instanceof Spanned) {
3219            return ((Spanned) mText).getSpans(0, mText.length(), URLSpan.class);
3220        } else {
3221            return new URLSpan[0];
3222        }
3223    }
3224
3225    /**
3226     * Sets the color of the hint text for all the states (disabled, focussed, selected...) of this
3227     * TextView.
3228     *
3229     * @see #setHintTextColor(ColorStateList)
3230     * @see #getHintTextColors()
3231     * @see #setTextColor(int)
3232     *
3233     * @attr ref android.R.styleable#TextView_textColorHint
3234     */
3235    @android.view.RemotableViewMethod
3236    public final void setHintTextColor(int color) {
3237        mHintTextColor = ColorStateList.valueOf(color);
3238        updateTextColors();
3239    }
3240
3241    /**
3242     * Sets the color of the hint text.
3243     *
3244     * @see #getHintTextColors()
3245     * @see #setHintTextColor(int)
3246     * @see #setTextColor(ColorStateList)
3247     * @see #setLinkTextColor(ColorStateList)
3248     *
3249     * @attr ref android.R.styleable#TextView_textColorHint
3250     */
3251    public final void setHintTextColor(ColorStateList colors) {
3252        mHintTextColor = colors;
3253        updateTextColors();
3254    }
3255
3256    /**
3257     * @return the color of the hint text, for the different states of this TextView.
3258     *
3259     * @see #setHintTextColor(ColorStateList)
3260     * @see #setHintTextColor(int)
3261     * @see #setTextColor(ColorStateList)
3262     * @see #setLinkTextColor(ColorStateList)
3263     *
3264     * @attr ref android.R.styleable#TextView_textColorHint
3265     */
3266    public final ColorStateList getHintTextColors() {
3267        return mHintTextColor;
3268    }
3269
3270    /**
3271     * <p>Return the current color selected to paint the hint text.</p>
3272     *
3273     * @return Returns the current hint text color.
3274     */
3275    public final int getCurrentHintTextColor() {
3276        return mHintTextColor != null ? mCurHintTextColor : mCurTextColor;
3277    }
3278
3279    /**
3280     * Sets the color of links in the text.
3281     *
3282     * @see #setLinkTextColor(ColorStateList)
3283     * @see #getLinkTextColors()
3284     *
3285     * @attr ref android.R.styleable#TextView_textColorLink
3286     */
3287    @android.view.RemotableViewMethod
3288    public final void setLinkTextColor(int color) {
3289        mLinkTextColor = ColorStateList.valueOf(color);
3290        updateTextColors();
3291    }
3292
3293    /**
3294     * Sets the color of links in the text.
3295     *
3296     * @see #setLinkTextColor(int)
3297     * @see #getLinkTextColors()
3298     * @see #setTextColor(ColorStateList)
3299     * @see #setHintTextColor(ColorStateList)
3300     *
3301     * @attr ref android.R.styleable#TextView_textColorLink
3302     */
3303    public final void setLinkTextColor(ColorStateList colors) {
3304        mLinkTextColor = colors;
3305        updateTextColors();
3306    }
3307
3308    /**
3309     * @return the list of colors used to paint the links in the text, for the different states of
3310     * this TextView
3311     *
3312     * @see #setLinkTextColor(ColorStateList)
3313     * @see #setLinkTextColor(int)
3314     *
3315     * @attr ref android.R.styleable#TextView_textColorLink
3316     */
3317    public final ColorStateList getLinkTextColors() {
3318        return mLinkTextColor;
3319    }
3320
3321    /**
3322     * Sets the horizontal alignment of the text and the
3323     * vertical gravity that will be used when there is extra space
3324     * in the TextView beyond what is required for the text itself.
3325     *
3326     * @see android.view.Gravity
3327     * @attr ref android.R.styleable#TextView_gravity
3328     */
3329    public void setGravity(int gravity) {
3330        if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) == 0) {
3331            gravity |= Gravity.START;
3332        }
3333        if ((gravity & Gravity.VERTICAL_GRAVITY_MASK) == 0) {
3334            gravity |= Gravity.TOP;
3335        }
3336
3337        boolean newLayout = false;
3338
3339        if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) !=
3340            (mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK)) {
3341            newLayout = true;
3342        }
3343
3344        if (gravity != mGravity) {
3345            invalidate();
3346        }
3347
3348        mGravity = gravity;
3349
3350        if (mLayout != null && newLayout) {
3351            // XXX this is heavy-handed because no actual content changes.
3352            int want = mLayout.getWidth();
3353            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
3354
3355            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
3356                          mRight - mLeft - getCompoundPaddingLeft() -
3357                          getCompoundPaddingRight(), true);
3358        }
3359    }
3360
3361    /**
3362     * Returns the horizontal and vertical alignment of this TextView.
3363     *
3364     * @see android.view.Gravity
3365     * @attr ref android.R.styleable#TextView_gravity
3366     */
3367    public int getGravity() {
3368        return mGravity;
3369    }
3370
3371    /**
3372     * @return the flags on the Paint being used to display the text.
3373     * @see Paint#getFlags
3374     */
3375    public int getPaintFlags() {
3376        return mTextPaint.getFlags();
3377    }
3378
3379    /**
3380     * Sets flags on the Paint being used to display the text and
3381     * reflows the text if they are different from the old flags.
3382     * @see Paint#setFlags
3383     */
3384    @android.view.RemotableViewMethod
3385    public void setPaintFlags(int flags) {
3386        if (mTextPaint.getFlags() != flags) {
3387            mTextPaint.setFlags(flags);
3388
3389            if (mLayout != null) {
3390                nullLayouts();
3391                requestLayout();
3392                invalidate();
3393            }
3394        }
3395    }
3396
3397    /**
3398     * Sets whether the text should be allowed to be wider than the
3399     * View is.  If false, it will be wrapped to the width of the View.
3400     *
3401     * @attr ref android.R.styleable#TextView_scrollHorizontally
3402     */
3403    public void setHorizontallyScrolling(boolean whether) {
3404        if (mHorizontallyScrolling != whether) {
3405            mHorizontallyScrolling = whether;
3406
3407            if (mLayout != null) {
3408                nullLayouts();
3409                requestLayout();
3410                invalidate();
3411            }
3412        }
3413    }
3414
3415    /**
3416     * Returns whether the text is allowed to be wider than the View is.
3417     * If false, the text will be wrapped to the width of the View.
3418     *
3419     * @attr ref android.R.styleable#TextView_scrollHorizontally
3420     * @hide
3421     */
3422    public boolean getHorizontallyScrolling() {
3423        return mHorizontallyScrolling;
3424    }
3425
3426    /**
3427     * Makes the TextView at least this many lines tall.
3428     *
3429     * Setting this value overrides any other (minimum) height setting. A single line TextView will
3430     * set this value to 1.
3431     *
3432     * @see #getMinLines()
3433     *
3434     * @attr ref android.R.styleable#TextView_minLines
3435     */
3436    @android.view.RemotableViewMethod
3437    public void setMinLines(int minlines) {
3438        mMinimum = minlines;
3439        mMinMode = LINES;
3440
3441        requestLayout();
3442        invalidate();
3443    }
3444
3445    /**
3446     * @return the minimum number of lines displayed in this TextView, or -1 if the minimum
3447     * height was set in pixels instead using {@link #setMinHeight(int) or #setHeight(int)}.
3448     *
3449     * @see #setMinLines(int)
3450     *
3451     * @attr ref android.R.styleable#TextView_minLines
3452     */
3453    public int getMinLines() {
3454        return mMinMode == LINES ? mMinimum : -1;
3455    }
3456
3457    /**
3458     * Makes the TextView at least this many pixels tall.
3459     *
3460     * Setting this value overrides any other (minimum) number of lines setting.
3461     *
3462     * @attr ref android.R.styleable#TextView_minHeight
3463     */
3464    @android.view.RemotableViewMethod
3465    public void setMinHeight(int minHeight) {
3466        mMinimum = minHeight;
3467        mMinMode = PIXELS;
3468
3469        requestLayout();
3470        invalidate();
3471    }
3472
3473    /**
3474     * @return the minimum height of this TextView expressed in pixels, or -1 if the minimum
3475     * height was set in number of lines instead using {@link #setMinLines(int) or #setLines(int)}.
3476     *
3477     * @see #setMinHeight(int)
3478     *
3479     * @attr ref android.R.styleable#TextView_minHeight
3480     */
3481    public int getMinHeight() {
3482        return mMinMode == PIXELS ? mMinimum : -1;
3483    }
3484
3485    /**
3486     * Makes the TextView at most this many lines tall.
3487     *
3488     * Setting this value overrides any other (maximum) height setting.
3489     *
3490     * @attr ref android.R.styleable#TextView_maxLines
3491     */
3492    @android.view.RemotableViewMethod
3493    public void setMaxLines(int maxlines) {
3494        mMaximum = maxlines;
3495        mMaxMode = LINES;
3496
3497        requestLayout();
3498        invalidate();
3499    }
3500
3501    /**
3502     * @return the maximum number of lines displayed in this TextView, or -1 if the maximum
3503     * height was set in pixels instead using {@link #setMaxHeight(int) or #setHeight(int)}.
3504     *
3505     * @see #setMaxLines(int)
3506     *
3507     * @attr ref android.R.styleable#TextView_maxLines
3508     */
3509    public int getMaxLines() {
3510        return mMaxMode == LINES ? mMaximum : -1;
3511    }
3512
3513    /**
3514     * Makes the TextView at most this many pixels tall.  This option is mutually exclusive with the
3515     * {@link #setMaxLines(int)} method.
3516     *
3517     * Setting this value overrides any other (maximum) number of lines setting.
3518     *
3519     * @attr ref android.R.styleable#TextView_maxHeight
3520     */
3521    @android.view.RemotableViewMethod
3522    public void setMaxHeight(int maxHeight) {
3523        mMaximum = maxHeight;
3524        mMaxMode = PIXELS;
3525
3526        requestLayout();
3527        invalidate();
3528    }
3529
3530    /**
3531     * @return the maximum height of this TextView expressed in pixels, or -1 if the maximum
3532     * height was set in number of lines instead using {@link #setMaxLines(int) or #setLines(int)}.
3533     *
3534     * @see #setMaxHeight(int)
3535     *
3536     * @attr ref android.R.styleable#TextView_maxHeight
3537     */
3538    public int getMaxHeight() {
3539        return mMaxMode == PIXELS ? mMaximum : -1;
3540    }
3541
3542    /**
3543     * Makes the TextView exactly this many lines tall.
3544     *
3545     * Note that setting this value overrides any other (minimum / maximum) number of lines or
3546     * height setting. A single line TextView will set this value to 1.
3547     *
3548     * @attr ref android.R.styleable#TextView_lines
3549     */
3550    @android.view.RemotableViewMethod
3551    public void setLines(int lines) {
3552        mMaximum = mMinimum = lines;
3553        mMaxMode = mMinMode = LINES;
3554
3555        requestLayout();
3556        invalidate();
3557    }
3558
3559    /**
3560     * Makes the TextView exactly this many pixels tall.
3561     * You could do the same thing by specifying this number in the
3562     * LayoutParams.
3563     *
3564     * Note that setting this value overrides any other (minimum / maximum) number of lines or
3565     * height setting.
3566     *
3567     * @attr ref android.R.styleable#TextView_height
3568     */
3569    @android.view.RemotableViewMethod
3570    public void setHeight(int pixels) {
3571        mMaximum = mMinimum = pixels;
3572        mMaxMode = mMinMode = PIXELS;
3573
3574        requestLayout();
3575        invalidate();
3576    }
3577
3578    /**
3579     * Makes the TextView at least this many ems wide
3580     *
3581     * @attr ref android.R.styleable#TextView_minEms
3582     */
3583    @android.view.RemotableViewMethod
3584    public void setMinEms(int minems) {
3585        mMinWidth = minems;
3586        mMinWidthMode = EMS;
3587
3588        requestLayout();
3589        invalidate();
3590    }
3591
3592    /**
3593     * @return the minimum width of the TextView, expressed in ems or -1 if the minimum width
3594     * was set in pixels instead (using {@link #setMinWidth(int)} or {@link #setWidth(int)}).
3595     *
3596     * @see #setMinEms(int)
3597     * @see #setEms(int)
3598     *
3599     * @attr ref android.R.styleable#TextView_minEms
3600     */
3601    public int getMinEms() {
3602        return mMinWidthMode == EMS ? mMinWidth : -1;
3603    }
3604
3605    /**
3606     * Makes the TextView at least this many pixels wide
3607     *
3608     * @attr ref android.R.styleable#TextView_minWidth
3609     */
3610    @android.view.RemotableViewMethod
3611    public void setMinWidth(int minpixels) {
3612        mMinWidth = minpixels;
3613        mMinWidthMode = PIXELS;
3614
3615        requestLayout();
3616        invalidate();
3617    }
3618
3619    /**
3620     * @return the minimum width of the TextView, in pixels or -1 if the minimum width
3621     * was set in ems instead (using {@link #setMinEms(int)} or {@link #setEms(int)}).
3622     *
3623     * @see #setMinWidth(int)
3624     * @see #setWidth(int)
3625     *
3626     * @attr ref android.R.styleable#TextView_minWidth
3627     */
3628    public int getMinWidth() {
3629        return mMinWidthMode == PIXELS ? mMinWidth : -1;
3630    }
3631
3632    /**
3633     * Makes the TextView at most this many ems wide
3634     *
3635     * @attr ref android.R.styleable#TextView_maxEms
3636     */
3637    @android.view.RemotableViewMethod
3638    public void setMaxEms(int maxems) {
3639        mMaxWidth = maxems;
3640        mMaxWidthMode = EMS;
3641
3642        requestLayout();
3643        invalidate();
3644    }
3645
3646    /**
3647     * @return the maximum width of the TextView, expressed in ems or -1 if the maximum width
3648     * was set in pixels instead (using {@link #setMaxWidth(int)} or {@link #setWidth(int)}).
3649     *
3650     * @see #setMaxEms(int)
3651     * @see #setEms(int)
3652     *
3653     * @attr ref android.R.styleable#TextView_maxEms
3654     */
3655    public int getMaxEms() {
3656        return mMaxWidthMode == EMS ? mMaxWidth : -1;
3657    }
3658
3659    /**
3660     * Makes the TextView at most this many pixels wide
3661     *
3662     * @attr ref android.R.styleable#TextView_maxWidth
3663     */
3664    @android.view.RemotableViewMethod
3665    public void setMaxWidth(int maxpixels) {
3666        mMaxWidth = maxpixels;
3667        mMaxWidthMode = PIXELS;
3668
3669        requestLayout();
3670        invalidate();
3671    }
3672
3673    /**
3674     * @return the maximum width of the TextView, in pixels or -1 if the maximum width
3675     * was set in ems instead (using {@link #setMaxEms(int)} or {@link #setEms(int)}).
3676     *
3677     * @see #setMaxWidth(int)
3678     * @see #setWidth(int)
3679     *
3680     * @attr ref android.R.styleable#TextView_maxWidth
3681     */
3682    public int getMaxWidth() {
3683        return mMaxWidthMode == PIXELS ? mMaxWidth : -1;
3684    }
3685
3686    /**
3687     * Makes the TextView exactly this many ems wide
3688     *
3689     * @see #setMaxEms(int)
3690     * @see #setMinEms(int)
3691     * @see #getMinEms()
3692     * @see #getMaxEms()
3693     *
3694     * @attr ref android.R.styleable#TextView_ems
3695     */
3696    @android.view.RemotableViewMethod
3697    public void setEms(int ems) {
3698        mMaxWidth = mMinWidth = ems;
3699        mMaxWidthMode = mMinWidthMode = EMS;
3700
3701        requestLayout();
3702        invalidate();
3703    }
3704
3705    /**
3706     * Makes the TextView exactly this many pixels wide.
3707     * You could do the same thing by specifying this number in the
3708     * LayoutParams.
3709     *
3710     * @see #setMaxWidth(int)
3711     * @see #setMinWidth(int)
3712     * @see #getMinWidth()
3713     * @see #getMaxWidth()
3714     *
3715     * @attr ref android.R.styleable#TextView_width
3716     */
3717    @android.view.RemotableViewMethod
3718    public void setWidth(int pixels) {
3719        mMaxWidth = mMinWidth = pixels;
3720        mMaxWidthMode = mMinWidthMode = PIXELS;
3721
3722        requestLayout();
3723        invalidate();
3724    }
3725
3726    /**
3727     * Sets line spacing for this TextView.  Each line will have its height
3728     * multiplied by <code>mult</code> and have <code>add</code> added to it.
3729     *
3730     * @attr ref android.R.styleable#TextView_lineSpacingExtra
3731     * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
3732     */
3733    public void setLineSpacing(float add, float mult) {
3734        if (mSpacingAdd != add || mSpacingMult != mult) {
3735            mSpacingAdd = add;
3736            mSpacingMult = mult;
3737
3738            if (mLayout != null) {
3739                nullLayouts();
3740                requestLayout();
3741                invalidate();
3742            }
3743        }
3744    }
3745
3746    /**
3747     * Gets the line spacing multiplier
3748     *
3749     * @return the value by which each line's height is multiplied to get its actual height.
3750     *
3751     * @see #setLineSpacing(float, float)
3752     * @see #getLineSpacingExtra()
3753     *
3754     * @attr ref android.R.styleable#TextView_lineSpacingMultiplier
3755     */
3756    public float getLineSpacingMultiplier() {
3757        return mSpacingMult;
3758    }
3759
3760    /**
3761     * Gets the line spacing extra space
3762     *
3763     * @return the extra space that is added to the height of each lines of this TextView.
3764     *
3765     * @see #setLineSpacing(float, float)
3766     * @see #getLineSpacingMultiplier()
3767     *
3768     * @attr ref android.R.styleable#TextView_lineSpacingExtra
3769     */
3770    public float getLineSpacingExtra() {
3771        return mSpacingAdd;
3772    }
3773
3774    /**
3775     * Convenience method: Append the specified text to the TextView's
3776     * display buffer, upgrading it to BufferType.EDITABLE if it was
3777     * not already editable.
3778     */
3779    public final void append(CharSequence text) {
3780        append(text, 0, text.length());
3781    }
3782
3783    /**
3784     * Convenience method: Append the specified text slice to the TextView's
3785     * display buffer, upgrading it to BufferType.EDITABLE if it was
3786     * not already editable.
3787     */
3788    public void append(CharSequence text, int start, int end) {
3789        if (!(mText instanceof Editable)) {
3790            setText(mText, BufferType.EDITABLE);
3791        }
3792
3793        ((Editable) mText).append(text, start, end);
3794    }
3795
3796    private void updateTextColors() {
3797        boolean inval = false;
3798        int color = mTextColor.getColorForState(getDrawableState(), 0);
3799        if (color != mCurTextColor) {
3800            mCurTextColor = color;
3801            inval = true;
3802        }
3803        if (mLinkTextColor != null) {
3804            color = mLinkTextColor.getColorForState(getDrawableState(), 0);
3805            if (color != mTextPaint.linkColor) {
3806                mTextPaint.linkColor = color;
3807                inval = true;
3808            }
3809        }
3810        if (mHintTextColor != null) {
3811            color = mHintTextColor.getColorForState(getDrawableState(), 0);
3812            if (color != mCurHintTextColor) {
3813                mCurHintTextColor = color;
3814                if (mText.length() == 0) {
3815                    inval = true;
3816                }
3817            }
3818        }
3819        if (inval) {
3820            // Text needs to be redrawn with the new color
3821            if (mEditor != null) mEditor.invalidateTextDisplayList();
3822            invalidate();
3823        }
3824    }
3825
3826    @Override
3827    protected void drawableStateChanged() {
3828        super.drawableStateChanged();
3829        if (mTextColor != null && mTextColor.isStateful()
3830                || (mHintTextColor != null && mHintTextColor.isStateful())
3831                || (mLinkTextColor != null && mLinkTextColor.isStateful())) {
3832            updateTextColors();
3833        }
3834
3835        if (mDrawables != null) {
3836            final int[] state = getDrawableState();
3837            for (Drawable dr : mDrawables.mShowing) {
3838                if (dr != null && dr.isStateful()) {
3839                    dr.setState(state);
3840                }
3841            }
3842        }
3843    }
3844
3845    @Override
3846    public void drawableHotspotChanged(float x, float y) {
3847        super.drawableHotspotChanged(x, y);
3848
3849        if (mDrawables != null) {
3850            final int[] state = getDrawableState();
3851            for (Drawable dr : mDrawables.mShowing) {
3852                if (dr != null && dr.isStateful()) {
3853                    dr.setHotspot(x, y);
3854                }
3855            }
3856        }
3857    }
3858
3859    @Override
3860    public Parcelable onSaveInstanceState() {
3861        Parcelable superState = super.onSaveInstanceState();
3862
3863        // Save state if we are forced to
3864        boolean save = mFreezesText;
3865        int start = 0;
3866        int end = 0;
3867
3868        if (mText != null) {
3869            start = getSelectionStart();
3870            end = getSelectionEnd();
3871            if (start >= 0 || end >= 0) {
3872                // Or save state if there is a selection
3873                save = true;
3874            }
3875        }
3876
3877        if (save) {
3878            SavedState ss = new SavedState(superState);
3879            // XXX Should also save the current scroll position!
3880            ss.selStart = start;
3881            ss.selEnd = end;
3882
3883            if (mText instanceof Spanned) {
3884                Spannable sp = new SpannableStringBuilder(mText);
3885
3886                if (mEditor != null) {
3887                    removeMisspelledSpans(sp);
3888                    sp.removeSpan(mEditor.mSuggestionRangeSpan);
3889                }
3890
3891                ss.text = sp;
3892            } else {
3893                ss.text = mText.toString();
3894            }
3895
3896            if (isFocused() && start >= 0 && end >= 0) {
3897                ss.frozenWithFocus = true;
3898            }
3899
3900            ss.error = getError();
3901
3902            return ss;
3903        }
3904
3905        return superState;
3906    }
3907
3908    void removeMisspelledSpans(Spannable spannable) {
3909        SuggestionSpan[] suggestionSpans = spannable.getSpans(0, spannable.length(),
3910                SuggestionSpan.class);
3911        for (int i = 0; i < suggestionSpans.length; i++) {
3912            int flags = suggestionSpans[i].getFlags();
3913            if ((flags & SuggestionSpan.FLAG_EASY_CORRECT) != 0
3914                    && (flags & SuggestionSpan.FLAG_MISSPELLED) != 0) {
3915                spannable.removeSpan(suggestionSpans[i]);
3916            }
3917        }
3918    }
3919
3920    @Override
3921    public void onRestoreInstanceState(Parcelable state) {
3922        if (!(state instanceof SavedState)) {
3923            super.onRestoreInstanceState(state);
3924            return;
3925        }
3926
3927        SavedState ss = (SavedState)state;
3928        super.onRestoreInstanceState(ss.getSuperState());
3929
3930        // XXX restore buffer type too, as well as lots of other stuff
3931        if (ss.text != null) {
3932            setText(ss.text);
3933        }
3934
3935        if (ss.selStart >= 0 && ss.selEnd >= 0) {
3936            if (mText instanceof Spannable) {
3937                int len = mText.length();
3938
3939                if (ss.selStart > len || ss.selEnd > len) {
3940                    String restored = "";
3941
3942                    if (ss.text != null) {
3943                        restored = "(restored) ";
3944                    }
3945
3946                    Log.e(LOG_TAG, "Saved cursor position " + ss.selStart +
3947                          "/" + ss.selEnd + " out of range for " + restored +
3948                          "text " + mText);
3949                } else {
3950                    Selection.setSelection((Spannable) mText, ss.selStart, ss.selEnd);
3951
3952                    if (ss.frozenWithFocus) {
3953                        createEditorIfNeeded();
3954                        mEditor.mFrozenWithFocus = true;
3955                    }
3956                }
3957            }
3958        }
3959
3960        if (ss.error != null) {
3961            final CharSequence error = ss.error;
3962            // Display the error later, after the first layout pass
3963            post(new Runnable() {
3964                public void run() {
3965                    if (mEditor == null || !mEditor.mErrorWasChanged) {
3966                        setError(error);
3967                    }
3968                }
3969            });
3970        }
3971    }
3972
3973    /**
3974     * Control whether this text view saves its entire text contents when
3975     * freezing to an icicle, in addition to dynamic state such as cursor
3976     * position.  By default this is false, not saving the text.  Set to true
3977     * if the text in the text view is not being saved somewhere else in
3978     * persistent storage (such as in a content provider) so that if the
3979     * view is later thawed the user will not lose their data.
3980     *
3981     * @param freezesText Controls whether a frozen icicle should include the
3982     * entire text data: true to include it, false to not.
3983     *
3984     * @attr ref android.R.styleable#TextView_freezesText
3985     */
3986    @android.view.RemotableViewMethod
3987    public void setFreezesText(boolean freezesText) {
3988        mFreezesText = freezesText;
3989    }
3990
3991    /**
3992     * Return whether this text view is including its entire text contents
3993     * in frozen icicles.
3994     *
3995     * @return Returns true if text is included, false if it isn't.
3996     *
3997     * @see #setFreezesText
3998     */
3999    public boolean getFreezesText() {
4000        return mFreezesText;
4001    }
4002
4003    ///////////////////////////////////////////////////////////////////////////
4004
4005    /**
4006     * Sets the Factory used to create new Editables.
4007     */
4008    public final void setEditableFactory(Editable.Factory factory) {
4009        mEditableFactory = factory;
4010        setText(mText);
4011    }
4012
4013    /**
4014     * Sets the Factory used to create new Spannables.
4015     */
4016    public final void setSpannableFactory(Spannable.Factory factory) {
4017        mSpannableFactory = factory;
4018        setText(mText);
4019    }
4020
4021    /**
4022     * Sets the string value of the TextView. TextView <em>does not</em> accept
4023     * HTML-like formatting, which you can do with text strings in XML resource files.
4024     * To style your strings, attach android.text.style.* objects to a
4025     * {@link android.text.SpannableString SpannableString}, or see the
4026     * <a href="{@docRoot}guide/topics/resources/available-resources.html#stringresources">
4027     * Available Resource Types</a> documentation for an example of setting
4028     * formatted text in the XML resource file.
4029     *
4030     * @attr ref android.R.styleable#TextView_text
4031     */
4032    @android.view.RemotableViewMethod
4033    public final void setText(CharSequence text) {
4034        setText(text, mBufferType);
4035    }
4036
4037    /**
4038     * Like {@link #setText(CharSequence)},
4039     * except that the cursor position (if any) is retained in the new text.
4040     *
4041     * @param text The new text to place in the text view.
4042     *
4043     * @see #setText(CharSequence)
4044     */
4045    @android.view.RemotableViewMethod
4046    public final void setTextKeepState(CharSequence text) {
4047        setTextKeepState(text, mBufferType);
4048    }
4049
4050    /**
4051     * Sets the text that this TextView is to display (see
4052     * {@link #setText(CharSequence)}) and also sets whether it is stored
4053     * in a styleable/spannable buffer and whether it is editable.
4054     *
4055     * @attr ref android.R.styleable#TextView_text
4056     * @attr ref android.R.styleable#TextView_bufferType
4057     */
4058    public void setText(CharSequence text, BufferType type) {
4059        setText(text, type, true, 0);
4060
4061        if (mCharWrapper != null) {
4062            mCharWrapper.mChars = null;
4063        }
4064    }
4065
4066    private void setText(CharSequence text, BufferType type,
4067                         boolean notifyBefore, int oldlen) {
4068        if (text == null) {
4069            text = "";
4070        }
4071
4072        // If suggestions are not enabled, remove the suggestion spans from the text
4073        if (!isSuggestionsEnabled()) {
4074            text = removeSuggestionSpans(text);
4075        }
4076
4077        if (!mUserSetTextScaleX) mTextPaint.setTextScaleX(1.0f);
4078
4079        if (text instanceof Spanned &&
4080            ((Spanned) text).getSpanStart(TextUtils.TruncateAt.MARQUEE) >= 0) {
4081            if (ViewConfiguration.get(mContext).isFadingMarqueeEnabled()) {
4082                setHorizontalFadingEdgeEnabled(true);
4083                mMarqueeFadeMode = MARQUEE_FADE_NORMAL;
4084            } else {
4085                setHorizontalFadingEdgeEnabled(false);
4086                mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
4087            }
4088            setEllipsize(TextUtils.TruncateAt.MARQUEE);
4089        }
4090
4091        int n = mFilters.length;
4092        for (int i = 0; i < n; i++) {
4093            CharSequence out = mFilters[i].filter(text, 0, text.length(), EMPTY_SPANNED, 0, 0);
4094            if (out != null) {
4095                text = out;
4096            }
4097        }
4098
4099        if (notifyBefore) {
4100            if (mText != null) {
4101                oldlen = mText.length();
4102                sendBeforeTextChanged(mText, 0, oldlen, text.length());
4103            } else {
4104                sendBeforeTextChanged("", 0, 0, text.length());
4105            }
4106        }
4107
4108        boolean needEditableForNotification = false;
4109
4110        if (mListeners != null && mListeners.size() != 0) {
4111            needEditableForNotification = true;
4112        }
4113
4114        if (type == BufferType.EDITABLE || getKeyListener() != null ||
4115                needEditableForNotification) {
4116            createEditorIfNeeded();
4117            Editable t = mEditableFactory.newEditable(text);
4118            text = t;
4119            setFilters(t, mFilters);
4120            InputMethodManager imm = InputMethodManager.peekInstance();
4121            if (imm != null) imm.restartInput(this);
4122        } else if (type == BufferType.SPANNABLE || mMovement != null) {
4123            text = mSpannableFactory.newSpannable(text);
4124        } else if (!(text instanceof CharWrapper)) {
4125            text = TextUtils.stringOrSpannedString(text);
4126        }
4127
4128        if (mAutoLinkMask != 0) {
4129            Spannable s2;
4130
4131            if (type == BufferType.EDITABLE || text instanceof Spannable) {
4132                s2 = (Spannable) text;
4133            } else {
4134                s2 = mSpannableFactory.newSpannable(text);
4135            }
4136
4137            if (Linkify.addLinks(s2, mAutoLinkMask)) {
4138                text = s2;
4139                type = (type == BufferType.EDITABLE) ? BufferType.EDITABLE : BufferType.SPANNABLE;
4140
4141                /*
4142                 * We must go ahead and set the text before changing the
4143                 * movement method, because setMovementMethod() may call
4144                 * setText() again to try to upgrade the buffer type.
4145                 */
4146                mText = text;
4147
4148                // Do not change the movement method for text that support text selection as it
4149                // would prevent an arbitrary cursor displacement.
4150                if (mLinksClickable && !textCanBeSelected()) {
4151                    setMovementMethod(LinkMovementMethod.getInstance());
4152                }
4153            }
4154        }
4155
4156        mBufferType = type;
4157        mText = text;
4158
4159        if (mTransformation == null) {
4160            mTransformed = text;
4161        } else {
4162            mTransformed = mTransformation.getTransformation(text, this);
4163        }
4164
4165        final int textLength = text.length();
4166
4167        if (text instanceof Spannable && !mAllowTransformationLengthChange) {
4168            Spannable sp = (Spannable) text;
4169
4170            // Remove any ChangeWatchers that might have come from other TextViews.
4171            final ChangeWatcher[] watchers = sp.getSpans(0, sp.length(), ChangeWatcher.class);
4172            final int count = watchers.length;
4173            for (int i = 0; i < count; i++) {
4174                sp.removeSpan(watchers[i]);
4175            }
4176
4177            if (mChangeWatcher == null) mChangeWatcher = new ChangeWatcher();
4178
4179            sp.setSpan(mChangeWatcher, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE |
4180                       (CHANGE_WATCHER_PRIORITY << Spanned.SPAN_PRIORITY_SHIFT));
4181
4182            if (mEditor != null) mEditor.addSpanWatchers(sp);
4183
4184            if (mTransformation != null) {
4185                sp.setSpan(mTransformation, 0, textLength, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
4186            }
4187
4188            if (mMovement != null) {
4189                mMovement.initialize(this, (Spannable) text);
4190
4191                /*
4192                 * Initializing the movement method will have set the
4193                 * selection, so reset mSelectionMoved to keep that from
4194                 * interfering with the normal on-focus selection-setting.
4195                 */
4196                if (mEditor != null) mEditor.mSelectionMoved = false;
4197            }
4198        }
4199
4200        if (mLayout != null) {
4201            checkForRelayout();
4202        }
4203
4204        sendOnTextChanged(text, 0, oldlen, textLength);
4205        onTextChanged(text, 0, oldlen, textLength);
4206
4207        notifyViewAccessibilityStateChangedIfNeeded(AccessibilityEvent.CONTENT_CHANGE_TYPE_TEXT);
4208
4209        if (needEditableForNotification) {
4210            sendAfterTextChanged((Editable) text);
4211        }
4212
4213        // SelectionModifierCursorController depends on textCanBeSelected, which depends on text
4214        if (mEditor != null) mEditor.prepareCursorControllers();
4215    }
4216
4217    /**
4218     * Sets the TextView to display the specified slice of the specified
4219     * char array.  You must promise that you will not change the contents
4220     * of the array except for right before another call to setText(),
4221     * since the TextView has no way to know that the text
4222     * has changed and that it needs to invalidate and re-layout.
4223     */
4224    public final void setText(char[] text, int start, int len) {
4225        int oldlen = 0;
4226
4227        if (start < 0 || len < 0 || start + len > text.length) {
4228            throw new IndexOutOfBoundsException(start + ", " + len);
4229        }
4230
4231        /*
4232         * We must do the before-notification here ourselves because if
4233         * the old text is a CharWrapper we destroy it before calling
4234         * into the normal path.
4235         */
4236        if (mText != null) {
4237            oldlen = mText.length();
4238            sendBeforeTextChanged(mText, 0, oldlen, len);
4239        } else {
4240            sendBeforeTextChanged("", 0, 0, len);
4241        }
4242
4243        if (mCharWrapper == null) {
4244            mCharWrapper = new CharWrapper(text, start, len);
4245        } else {
4246            mCharWrapper.set(text, start, len);
4247        }
4248
4249        setText(mCharWrapper, mBufferType, false, oldlen);
4250    }
4251
4252    /**
4253     * Like {@link #setText(CharSequence, android.widget.TextView.BufferType)},
4254     * except that the cursor position (if any) is retained in the new text.
4255     *
4256     * @see #setText(CharSequence, android.widget.TextView.BufferType)
4257     */
4258    public final void setTextKeepState(CharSequence text, BufferType type) {
4259        int start = getSelectionStart();
4260        int end = getSelectionEnd();
4261        int len = text.length();
4262
4263        setText(text, type);
4264
4265        if (start >= 0 || end >= 0) {
4266            if (mText instanceof Spannable) {
4267                Selection.setSelection((Spannable) mText,
4268                                       Math.max(0, Math.min(start, len)),
4269                                       Math.max(0, Math.min(end, len)));
4270            }
4271        }
4272    }
4273
4274    @android.view.RemotableViewMethod
4275    public final void setText(@StringRes int resid) {
4276        setText(getContext().getResources().getText(resid));
4277    }
4278
4279    public final void setText(@StringRes int resid, BufferType type) {
4280        setText(getContext().getResources().getText(resid), type);
4281    }
4282
4283    /**
4284     * Sets the text to be displayed when the text of the TextView is empty.
4285     * Null means to use the normal empty text. The hint does not currently
4286     * participate in determining the size of the view.
4287     *
4288     * @attr ref android.R.styleable#TextView_hint
4289     */
4290    @android.view.RemotableViewMethod
4291    public final void setHint(CharSequence hint) {
4292        mHint = TextUtils.stringOrSpannedString(hint);
4293
4294        if (mLayout != null) {
4295            checkForRelayout();
4296        }
4297
4298        if (mText.length() == 0) {
4299            invalidate();
4300        }
4301
4302        // Invalidate display list if hint is currently used
4303        if (mEditor != null && mText.length() == 0 && mHint != null) {
4304            mEditor.invalidateTextDisplayList();
4305        }
4306    }
4307
4308    /**
4309     * Sets the text to be displayed when the text of the TextView is empty,
4310     * from a resource.
4311     *
4312     * @attr ref android.R.styleable#TextView_hint
4313     */
4314    @android.view.RemotableViewMethod
4315    public final void setHint(@StringRes int resid) {
4316        setHint(getContext().getResources().getText(resid));
4317    }
4318
4319    /**
4320     * Returns the hint that is displayed when the text of the TextView
4321     * is empty.
4322     *
4323     * @attr ref android.R.styleable#TextView_hint
4324     */
4325    @ViewDebug.CapturedViewProperty
4326    public CharSequence getHint() {
4327        return mHint;
4328    }
4329
4330    boolean isSingleLine() {
4331        return mSingleLine;
4332    }
4333
4334    private static boolean isMultilineInputType(int type) {
4335        return (type & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE)) ==
4336            (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE);
4337    }
4338
4339    /**
4340     * Removes the suggestion spans.
4341     */
4342    CharSequence removeSuggestionSpans(CharSequence text) {
4343       if (text instanceof Spanned) {
4344           Spannable spannable;
4345           if (text instanceof Spannable) {
4346               spannable = (Spannable) text;
4347           } else {
4348               spannable = new SpannableString(text);
4349               text = spannable;
4350           }
4351
4352           SuggestionSpan[] spans = spannable.getSpans(0, text.length(), SuggestionSpan.class);
4353           for (int i = 0; i < spans.length; i++) {
4354               spannable.removeSpan(spans[i]);
4355           }
4356       }
4357       return text;
4358    }
4359
4360    /**
4361     * Set the type of the content with a constant as defined for {@link EditorInfo#inputType}. This
4362     * will take care of changing the key listener, by calling {@link #setKeyListener(KeyListener)},
4363     * to match the given content type.  If the given content type is {@link EditorInfo#TYPE_NULL}
4364     * then a soft keyboard will not be displayed for this text view.
4365     *
4366     * Note that the maximum number of displayed lines (see {@link #setMaxLines(int)}) will be
4367     * modified if you change the {@link EditorInfo#TYPE_TEXT_FLAG_MULTI_LINE} flag of the input
4368     * type.
4369     *
4370     * @see #getInputType()
4371     * @see #setRawInputType(int)
4372     * @see android.text.InputType
4373     * @attr ref android.R.styleable#TextView_inputType
4374     */
4375    public void setInputType(int type) {
4376        final boolean wasPassword = isPasswordInputType(getInputType());
4377        final boolean wasVisiblePassword = isVisiblePasswordInputType(getInputType());
4378        setInputType(type, false);
4379        final boolean isPassword = isPasswordInputType(type);
4380        final boolean isVisiblePassword = isVisiblePasswordInputType(type);
4381        boolean forceUpdate = false;
4382        if (isPassword) {
4383            setTransformationMethod(PasswordTransformationMethod.getInstance());
4384            setTypefaceFromAttrs(null /* fontFamily */, MONOSPACE, 0);
4385        } else if (isVisiblePassword) {
4386            if (mTransformation == PasswordTransformationMethod.getInstance()) {
4387                forceUpdate = true;
4388            }
4389            setTypefaceFromAttrs(null /* fontFamily */, MONOSPACE, 0);
4390        } else if (wasPassword || wasVisiblePassword) {
4391            // not in password mode, clean up typeface and transformation
4392            setTypefaceFromAttrs(null /* fontFamily */, -1, -1);
4393            if (mTransformation == PasswordTransformationMethod.getInstance()) {
4394                forceUpdate = true;
4395            }
4396        }
4397
4398        boolean singleLine = !isMultilineInputType(type);
4399
4400        // We need to update the single line mode if it has changed or we
4401        // were previously in password mode.
4402        if (mSingleLine != singleLine || forceUpdate) {
4403            // Change single line mode, but only change the transformation if
4404            // we are not in password mode.
4405            applySingleLine(singleLine, !isPassword, true);
4406        }
4407
4408        if (!isSuggestionsEnabled()) {
4409            mText = removeSuggestionSpans(mText);
4410        }
4411
4412        InputMethodManager imm = InputMethodManager.peekInstance();
4413        if (imm != null) imm.restartInput(this);
4414    }
4415
4416    /**
4417     * It would be better to rely on the input type for everything. A password inputType should have
4418     * a password transformation. We should hence use isPasswordInputType instead of this method.
4419     *
4420     * We should:
4421     * - Call setInputType in setKeyListener instead of changing the input type directly (which
4422     * would install the correct transformation).
4423     * - Refuse the installation of a non-password transformation in setTransformation if the input
4424     * type is password.
4425     *
4426     * However, this is like this for legacy reasons and we cannot break existing apps. This method
4427     * is useful since it matches what the user can see (obfuscated text or not).
4428     *
4429     * @return true if the current transformation method is of the password type.
4430     */
4431    private boolean hasPasswordTransformationMethod() {
4432        return mTransformation instanceof PasswordTransformationMethod;
4433    }
4434
4435    private static boolean isPasswordInputType(int inputType) {
4436        final int variation =
4437                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
4438        return variation
4439                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_PASSWORD)
4440                || variation
4441                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD)
4442                || variation
4443                == (EditorInfo.TYPE_CLASS_NUMBER | EditorInfo.TYPE_NUMBER_VARIATION_PASSWORD);
4444    }
4445
4446    private static boolean isVisiblePasswordInputType(int inputType) {
4447        final int variation =
4448                inputType & (EditorInfo.TYPE_MASK_CLASS | EditorInfo.TYPE_MASK_VARIATION);
4449        return variation
4450                == (EditorInfo.TYPE_CLASS_TEXT | EditorInfo.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
4451    }
4452
4453    /**
4454     * Directly change the content type integer of the text view, without
4455     * modifying any other state.
4456     * @see #setInputType(int)
4457     * @see android.text.InputType
4458     * @attr ref android.R.styleable#TextView_inputType
4459     */
4460    public void setRawInputType(int type) {
4461        if (type == InputType.TYPE_NULL && mEditor == null) return; //TYPE_NULL is the default value
4462        createEditorIfNeeded();
4463        mEditor.mInputType = type;
4464    }
4465
4466    private void setInputType(int type, boolean direct) {
4467        final int cls = type & EditorInfo.TYPE_MASK_CLASS;
4468        KeyListener input;
4469        if (cls == EditorInfo.TYPE_CLASS_TEXT) {
4470            boolean autotext = (type & EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT) != 0;
4471            TextKeyListener.Capitalize cap;
4472            if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_CHARACTERS) != 0) {
4473                cap = TextKeyListener.Capitalize.CHARACTERS;
4474            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_WORDS) != 0) {
4475                cap = TextKeyListener.Capitalize.WORDS;
4476            } else if ((type & EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES) != 0) {
4477                cap = TextKeyListener.Capitalize.SENTENCES;
4478            } else {
4479                cap = TextKeyListener.Capitalize.NONE;
4480            }
4481            input = TextKeyListener.getInstance(autotext, cap);
4482        } else if (cls == EditorInfo.TYPE_CLASS_NUMBER) {
4483            input = DigitsKeyListener.getInstance(
4484                    (type & EditorInfo.TYPE_NUMBER_FLAG_SIGNED) != 0,
4485                    (type & EditorInfo.TYPE_NUMBER_FLAG_DECIMAL) != 0);
4486        } else if (cls == EditorInfo.TYPE_CLASS_DATETIME) {
4487            switch (type & EditorInfo.TYPE_MASK_VARIATION) {
4488                case EditorInfo.TYPE_DATETIME_VARIATION_DATE:
4489                    input = DateKeyListener.getInstance();
4490                    break;
4491                case EditorInfo.TYPE_DATETIME_VARIATION_TIME:
4492                    input = TimeKeyListener.getInstance();
4493                    break;
4494                default:
4495                    input = DateTimeKeyListener.getInstance();
4496                    break;
4497            }
4498        } else if (cls == EditorInfo.TYPE_CLASS_PHONE) {
4499            input = DialerKeyListener.getInstance();
4500        } else {
4501            input = TextKeyListener.getInstance();
4502        }
4503        setRawInputType(type);
4504        if (direct) {
4505            createEditorIfNeeded();
4506            mEditor.mKeyListener = input;
4507        } else {
4508            setKeyListenerOnly(input);
4509        }
4510    }
4511
4512    /**
4513     * Get the type of the editable content.
4514     *
4515     * @see #setInputType(int)
4516     * @see android.text.InputType
4517     */
4518    public int getInputType() {
4519        return mEditor == null ? EditorInfo.TYPE_NULL : mEditor.mInputType;
4520    }
4521
4522    /**
4523     * Change the editor type integer associated with the text view, which
4524     * will be reported to an IME with {@link EditorInfo#imeOptions} when it
4525     * has focus.
4526     * @see #getImeOptions
4527     * @see android.view.inputmethod.EditorInfo
4528     * @attr ref android.R.styleable#TextView_imeOptions
4529     */
4530    public void setImeOptions(int imeOptions) {
4531        createEditorIfNeeded();
4532        mEditor.createInputContentTypeIfNeeded();
4533        mEditor.mInputContentType.imeOptions = imeOptions;
4534    }
4535
4536    /**
4537     * Get the type of the IME editor.
4538     *
4539     * @see #setImeOptions(int)
4540     * @see android.view.inputmethod.EditorInfo
4541     */
4542    public int getImeOptions() {
4543        return mEditor != null && mEditor.mInputContentType != null
4544                ? mEditor.mInputContentType.imeOptions : EditorInfo.IME_NULL;
4545    }
4546
4547    /**
4548     * Change the custom IME action associated with the text view, which
4549     * will be reported to an IME with {@link EditorInfo#actionLabel}
4550     * and {@link EditorInfo#actionId} when it has focus.
4551     * @see #getImeActionLabel
4552     * @see #getImeActionId
4553     * @see android.view.inputmethod.EditorInfo
4554     * @attr ref android.R.styleable#TextView_imeActionLabel
4555     * @attr ref android.R.styleable#TextView_imeActionId
4556     */
4557    public void setImeActionLabel(CharSequence label, int actionId) {
4558        createEditorIfNeeded();
4559        mEditor.createInputContentTypeIfNeeded();
4560        mEditor.mInputContentType.imeActionLabel = label;
4561        mEditor.mInputContentType.imeActionId = actionId;
4562    }
4563
4564    /**
4565     * Get the IME action label previous set with {@link #setImeActionLabel}.
4566     *
4567     * @see #setImeActionLabel
4568     * @see android.view.inputmethod.EditorInfo
4569     */
4570    public CharSequence getImeActionLabel() {
4571        return mEditor != null && mEditor.mInputContentType != null
4572                ? mEditor.mInputContentType.imeActionLabel : null;
4573    }
4574
4575    /**
4576     * Get the IME action ID previous set with {@link #setImeActionLabel}.
4577     *
4578     * @see #setImeActionLabel
4579     * @see android.view.inputmethod.EditorInfo
4580     */
4581    public int getImeActionId() {
4582        return mEditor != null && mEditor.mInputContentType != null
4583                ? mEditor.mInputContentType.imeActionId : 0;
4584    }
4585
4586    /**
4587     * Set a special listener to be called when an action is performed
4588     * on the text view.  This will be called when the enter key is pressed,
4589     * or when an action supplied to the IME is selected by the user.  Setting
4590     * this means that the normal hard key event will not insert a newline
4591     * into the text view, even if it is multi-line; holding down the ALT
4592     * modifier will, however, allow the user to insert a newline character.
4593     */
4594    public void setOnEditorActionListener(OnEditorActionListener l) {
4595        createEditorIfNeeded();
4596        mEditor.createInputContentTypeIfNeeded();
4597        mEditor.mInputContentType.onEditorActionListener = l;
4598    }
4599
4600    /**
4601     * Called when an attached input method calls
4602     * {@link InputConnection#performEditorAction(int)
4603     * InputConnection.performEditorAction()}
4604     * for this text view.  The default implementation will call your action
4605     * listener supplied to {@link #setOnEditorActionListener}, or perform
4606     * a standard operation for {@link EditorInfo#IME_ACTION_NEXT
4607     * EditorInfo.IME_ACTION_NEXT}, {@link EditorInfo#IME_ACTION_PREVIOUS
4608     * EditorInfo.IME_ACTION_PREVIOUS}, or {@link EditorInfo#IME_ACTION_DONE
4609     * EditorInfo.IME_ACTION_DONE}.
4610     *
4611     * <p>For backwards compatibility, if no IME options have been set and the
4612     * text view would not normally advance focus on enter, then
4613     * the NEXT and DONE actions received here will be turned into an enter
4614     * key down/up pair to go through the normal key handling.
4615     *
4616     * @param actionCode The code of the action being performed.
4617     *
4618     * @see #setOnEditorActionListener
4619     */
4620    public void onEditorAction(int actionCode) {
4621        final Editor.InputContentType ict = mEditor == null ? null : mEditor.mInputContentType;
4622        if (ict != null) {
4623            if (ict.onEditorActionListener != null) {
4624                if (ict.onEditorActionListener.onEditorAction(this,
4625                        actionCode, null)) {
4626                    return;
4627                }
4628            }
4629
4630            // This is the handling for some default action.
4631            // Note that for backwards compatibility we don't do this
4632            // default handling if explicit ime options have not been given,
4633            // instead turning this into the normal enter key codes that an
4634            // app may be expecting.
4635            if (actionCode == EditorInfo.IME_ACTION_NEXT) {
4636                View v = focusSearch(FOCUS_FORWARD);
4637                if (v != null) {
4638                    if (!v.requestFocus(FOCUS_FORWARD)) {
4639                        throw new IllegalStateException("focus search returned a view " +
4640                                "that wasn't able to take focus!");
4641                    }
4642                }
4643                return;
4644
4645            } else if (actionCode == EditorInfo.IME_ACTION_PREVIOUS) {
4646                View v = focusSearch(FOCUS_BACKWARD);
4647                if (v != null) {
4648                    if (!v.requestFocus(FOCUS_BACKWARD)) {
4649                        throw new IllegalStateException("focus search returned a view " +
4650                                "that wasn't able to take focus!");
4651                    }
4652                }
4653                return;
4654
4655            } else if (actionCode == EditorInfo.IME_ACTION_DONE) {
4656                InputMethodManager imm = InputMethodManager.peekInstance();
4657                if (imm != null && imm.isActive(this)) {
4658                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
4659                }
4660                return;
4661            }
4662        }
4663
4664        ViewRootImpl viewRootImpl = getViewRootImpl();
4665        if (viewRootImpl != null) {
4666            long eventTime = SystemClock.uptimeMillis();
4667            viewRootImpl.dispatchKeyFromIme(
4668                    new KeyEvent(eventTime, eventTime,
4669                    KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_ENTER, 0, 0,
4670                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
4671                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
4672                    | KeyEvent.FLAG_EDITOR_ACTION));
4673            viewRootImpl.dispatchKeyFromIme(
4674                    new KeyEvent(SystemClock.uptimeMillis(), eventTime,
4675                    KeyEvent.ACTION_UP, KeyEvent.KEYCODE_ENTER, 0, 0,
4676                    KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
4677                    KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE
4678                    | KeyEvent.FLAG_EDITOR_ACTION));
4679        }
4680    }
4681
4682    /**
4683     * Set the private content type of the text, which is the
4684     * {@link EditorInfo#privateImeOptions EditorInfo.privateImeOptions}
4685     * field that will be filled in when creating an input connection.
4686     *
4687     * @see #getPrivateImeOptions()
4688     * @see EditorInfo#privateImeOptions
4689     * @attr ref android.R.styleable#TextView_privateImeOptions
4690     */
4691    public void setPrivateImeOptions(String type) {
4692        createEditorIfNeeded();
4693        mEditor.createInputContentTypeIfNeeded();
4694        mEditor.mInputContentType.privateImeOptions = type;
4695    }
4696
4697    /**
4698     * Get the private type of the content.
4699     *
4700     * @see #setPrivateImeOptions(String)
4701     * @see EditorInfo#privateImeOptions
4702     */
4703    public String getPrivateImeOptions() {
4704        return mEditor != null && mEditor.mInputContentType != null
4705                ? mEditor.mInputContentType.privateImeOptions : null;
4706    }
4707
4708    /**
4709     * Set the extra input data of the text, which is the
4710     * {@link EditorInfo#extras TextBoxAttribute.extras}
4711     * Bundle that will be filled in when creating an input connection.  The
4712     * given integer is the resource ID of an XML resource holding an
4713     * {@link android.R.styleable#InputExtras &lt;input-extras&gt;} XML tree.
4714     *
4715     * @see #getInputExtras(boolean)
4716     * @see EditorInfo#extras
4717     * @attr ref android.R.styleable#TextView_editorExtras
4718     */
4719    public void setInputExtras(@XmlRes int xmlResId) throws XmlPullParserException, IOException {
4720        createEditorIfNeeded();
4721        XmlResourceParser parser = getResources().getXml(xmlResId);
4722        mEditor.createInputContentTypeIfNeeded();
4723        mEditor.mInputContentType.extras = new Bundle();
4724        getResources().parseBundleExtras(parser, mEditor.mInputContentType.extras);
4725    }
4726
4727    /**
4728     * Retrieve the input extras currently associated with the text view, which
4729     * can be viewed as well as modified.
4730     *
4731     * @param create If true, the extras will be created if they don't already
4732     * exist.  Otherwise, null will be returned if none have been created.
4733     * @see #setInputExtras(int)
4734     * @see EditorInfo#extras
4735     * @attr ref android.R.styleable#TextView_editorExtras
4736     */
4737    public Bundle getInputExtras(boolean create) {
4738        if (mEditor == null && !create) return null;
4739        createEditorIfNeeded();
4740        if (mEditor.mInputContentType == null) {
4741            if (!create) return null;
4742            mEditor.createInputContentTypeIfNeeded();
4743        }
4744        if (mEditor.mInputContentType.extras == null) {
4745            if (!create) return null;
4746            mEditor.mInputContentType.extras = new Bundle();
4747        }
4748        return mEditor.mInputContentType.extras;
4749    }
4750
4751    /**
4752     * Returns the error message that was set to be displayed with
4753     * {@link #setError}, or <code>null</code> if no error was set
4754     * or if it the error was cleared by the widget after user input.
4755     */
4756    public CharSequence getError() {
4757        return mEditor == null ? null : mEditor.mError;
4758    }
4759
4760    /**
4761     * Sets the right-hand compound drawable of the TextView to the "error"
4762     * icon and sets an error message that will be displayed in a popup when
4763     * the TextView has focus.  The icon and error message will be reset to
4764     * null when any key events cause changes to the TextView's text.  If the
4765     * <code>error</code> is <code>null</code>, the error message and icon
4766     * will be cleared.
4767     */
4768    @android.view.RemotableViewMethod
4769    public void setError(CharSequence error) {
4770        if (error == null) {
4771            setError(null, null);
4772        } else {
4773            Drawable dr = getContext().getDrawable(
4774                    com.android.internal.R.drawable.indicator_input_error);
4775
4776            dr.setBounds(0, 0, dr.getIntrinsicWidth(), dr.getIntrinsicHeight());
4777            setError(error, dr);
4778        }
4779    }
4780
4781    /**
4782     * Sets the right-hand compound drawable of the TextView to the specified
4783     * icon and sets an error message that will be displayed in a popup when
4784     * the TextView has focus.  The icon and error message will be reset to
4785     * null when any key events cause changes to the TextView's text.  The
4786     * drawable must already have had {@link Drawable#setBounds} set on it.
4787     * If the <code>error</code> is <code>null</code>, the error message will
4788     * be cleared (and you should provide a <code>null</code> icon as well).
4789     */
4790    public void setError(CharSequence error, Drawable icon) {
4791        createEditorIfNeeded();
4792        mEditor.setError(error, icon);
4793        notifyViewAccessibilityStateChangedIfNeeded(
4794                AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED);
4795    }
4796
4797    @Override
4798    protected boolean setFrame(int l, int t, int r, int b) {
4799        boolean result = super.setFrame(l, t, r, b);
4800
4801        if (mEditor != null) mEditor.setFrame();
4802
4803        restartMarqueeIfNeeded();
4804
4805        return result;
4806    }
4807
4808    private void restartMarqueeIfNeeded() {
4809        if (mRestartMarquee && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
4810            mRestartMarquee = false;
4811            startMarquee();
4812        }
4813    }
4814
4815    /**
4816     * Sets the list of input filters that will be used if the buffer is
4817     * Editable. Has no effect otherwise.
4818     *
4819     * @attr ref android.R.styleable#TextView_maxLength
4820     */
4821    public void setFilters(InputFilter[] filters) {
4822        if (filters == null) {
4823            throw new IllegalArgumentException();
4824        }
4825
4826        mFilters = filters;
4827
4828        if (mText instanceof Editable) {
4829            setFilters((Editable) mText, filters);
4830        }
4831    }
4832
4833    /**
4834     * Sets the list of input filters on the specified Editable,
4835     * and includes mInput in the list if it is an InputFilter.
4836     */
4837    private void setFilters(Editable e, InputFilter[] filters) {
4838        if (mEditor != null) {
4839            final boolean undoFilter = mEditor.mUndoInputFilter != null;
4840            final boolean keyFilter = mEditor.mKeyListener instanceof InputFilter;
4841            int num = 0;
4842            if (undoFilter) num++;
4843            if (keyFilter) num++;
4844            if (num > 0) {
4845                InputFilter[] nf = new InputFilter[filters.length + num];
4846
4847                System.arraycopy(filters, 0, nf, 0, filters.length);
4848                num = 0;
4849                if (undoFilter) {
4850                    nf[filters.length] = mEditor.mUndoInputFilter;
4851                    num++;
4852                }
4853                if (keyFilter) {
4854                    nf[filters.length + num] = (InputFilter) mEditor.mKeyListener;
4855                }
4856
4857                e.setFilters(nf);
4858                return;
4859            }
4860        }
4861        e.setFilters(filters);
4862    }
4863
4864    /**
4865     * Returns the current list of input filters.
4866     *
4867     * @attr ref android.R.styleable#TextView_maxLength
4868     */
4869    public InputFilter[] getFilters() {
4870        return mFilters;
4871    }
4872
4873    /////////////////////////////////////////////////////////////////////////
4874
4875    private int getBoxHeight(Layout l) {
4876        Insets opticalInsets = isLayoutModeOptical(mParent) ? getOpticalInsets() : Insets.NONE;
4877        int padding = (l == mHintLayout) ?
4878                getCompoundPaddingTop() + getCompoundPaddingBottom() :
4879                getExtendedPaddingTop() + getExtendedPaddingBottom();
4880        return getMeasuredHeight() - padding + opticalInsets.top + opticalInsets.bottom;
4881    }
4882
4883    int getVerticalOffset(boolean forceNormal) {
4884        int voffset = 0;
4885        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
4886
4887        Layout l = mLayout;
4888        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
4889            l = mHintLayout;
4890        }
4891
4892        if (gravity != Gravity.TOP) {
4893            int boxht = getBoxHeight(l);
4894            int textht = l.getHeight();
4895
4896            if (textht < boxht) {
4897                if (gravity == Gravity.BOTTOM)
4898                    voffset = boxht - textht;
4899                else // (gravity == Gravity.CENTER_VERTICAL)
4900                    voffset = (boxht - textht) >> 1;
4901            }
4902        }
4903        return voffset;
4904    }
4905
4906    private int getBottomVerticalOffset(boolean forceNormal) {
4907        int voffset = 0;
4908        final int gravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
4909
4910        Layout l = mLayout;
4911        if (!forceNormal && mText.length() == 0 && mHintLayout != null) {
4912            l = mHintLayout;
4913        }
4914
4915        if (gravity != Gravity.BOTTOM) {
4916            int boxht = getBoxHeight(l);
4917            int textht = l.getHeight();
4918
4919            if (textht < boxht) {
4920                if (gravity == Gravity.TOP)
4921                    voffset = boxht - textht;
4922                else // (gravity == Gravity.CENTER_VERTICAL)
4923                    voffset = (boxht - textht) >> 1;
4924            }
4925        }
4926        return voffset;
4927    }
4928
4929    void invalidateCursorPath() {
4930        if (mHighlightPathBogus) {
4931            invalidateCursor();
4932        } else {
4933            final int horizontalPadding = getCompoundPaddingLeft();
4934            final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
4935
4936            if (mEditor.mCursorCount == 0) {
4937                synchronized (TEMP_RECTF) {
4938                    /*
4939                     * The reason for this concern about the thickness of the
4940                     * cursor and doing the floor/ceil on the coordinates is that
4941                     * some EditTexts (notably textfields in the Browser) have
4942                     * anti-aliased text where not all the characters are
4943                     * necessarily at integer-multiple locations.  This should
4944                     * make sure the entire cursor gets invalidated instead of
4945                     * sometimes missing half a pixel.
4946                     */
4947                    float thick = (float) Math.ceil(mTextPaint.getStrokeWidth());
4948                    if (thick < 1.0f) {
4949                        thick = 1.0f;
4950                    }
4951
4952                    thick /= 2.0f;
4953
4954                    // mHighlightPath is guaranteed to be non null at that point.
4955                    mHighlightPath.computeBounds(TEMP_RECTF, false);
4956
4957                    invalidate((int) Math.floor(horizontalPadding + TEMP_RECTF.left - thick),
4958                            (int) Math.floor(verticalPadding + TEMP_RECTF.top - thick),
4959                            (int) Math.ceil(horizontalPadding + TEMP_RECTF.right + thick),
4960                            (int) Math.ceil(verticalPadding + TEMP_RECTF.bottom + thick));
4961                }
4962            } else {
4963                for (int i = 0; i < mEditor.mCursorCount; i++) {
4964                    Rect bounds = mEditor.mCursorDrawable[i].getBounds();
4965                    invalidate(bounds.left + horizontalPadding, bounds.top + verticalPadding,
4966                            bounds.right + horizontalPadding, bounds.bottom + verticalPadding);
4967                }
4968            }
4969        }
4970    }
4971
4972    void invalidateCursor() {
4973        int where = getSelectionEnd();
4974
4975        invalidateCursor(where, where, where);
4976    }
4977
4978    private void invalidateCursor(int a, int b, int c) {
4979        if (a >= 0 || b >= 0 || c >= 0) {
4980            int start = Math.min(Math.min(a, b), c);
4981            int end = Math.max(Math.max(a, b), c);
4982            invalidateRegion(start, end, true /* Also invalidates blinking cursor */);
4983        }
4984    }
4985
4986    /**
4987     * Invalidates the region of text enclosed between the start and end text offsets.
4988     */
4989    void invalidateRegion(int start, int end, boolean invalidateCursor) {
4990        if (mLayout == null) {
4991            invalidate();
4992        } else {
4993                int lineStart = mLayout.getLineForOffset(start);
4994                int top = mLayout.getLineTop(lineStart);
4995
4996                // This is ridiculous, but the descent from the line above
4997                // can hang down into the line we really want to redraw,
4998                // so we have to invalidate part of the line above to make
4999                // sure everything that needs to be redrawn really is.
5000                // (But not the whole line above, because that would cause
5001                // the same problem with the descenders on the line above it!)
5002                if (lineStart > 0) {
5003                    top -= mLayout.getLineDescent(lineStart - 1);
5004                }
5005
5006                int lineEnd;
5007
5008                if (start == end)
5009                    lineEnd = lineStart;
5010                else
5011                    lineEnd = mLayout.getLineForOffset(end);
5012
5013                int bottom = mLayout.getLineBottom(lineEnd);
5014
5015                // mEditor can be null in case selection is set programmatically.
5016                if (invalidateCursor && mEditor != null) {
5017                    for (int i = 0; i < mEditor.mCursorCount; i++) {
5018                        Rect bounds = mEditor.mCursorDrawable[i].getBounds();
5019                        top = Math.min(top, bounds.top);
5020                        bottom = Math.max(bottom, bounds.bottom);
5021                    }
5022                }
5023
5024                final int compoundPaddingLeft = getCompoundPaddingLeft();
5025                final int verticalPadding = getExtendedPaddingTop() + getVerticalOffset(true);
5026
5027                int left, right;
5028                if (lineStart == lineEnd && !invalidateCursor) {
5029                    left = (int) mLayout.getPrimaryHorizontal(start);
5030                    right = (int) (mLayout.getPrimaryHorizontal(end) + 1.0);
5031                    left += compoundPaddingLeft;
5032                    right += compoundPaddingLeft;
5033                } else {
5034                    // Rectangle bounding box when the region spans several lines
5035                    left = compoundPaddingLeft;
5036                    right = getWidth() - getCompoundPaddingRight();
5037                }
5038
5039                invalidate(mScrollX + left, verticalPadding + top,
5040                        mScrollX + right, verticalPadding + bottom);
5041        }
5042    }
5043
5044    private void registerForPreDraw() {
5045        if (!mPreDrawRegistered) {
5046            getViewTreeObserver().addOnPreDrawListener(this);
5047            mPreDrawRegistered = true;
5048        }
5049    }
5050
5051    private void unregisterForPreDraw() {
5052        getViewTreeObserver().removeOnPreDrawListener(this);
5053        mPreDrawRegistered = false;
5054        mPreDrawListenerDetached = false;
5055    }
5056
5057    /**
5058     * {@inheritDoc}
5059     */
5060    public boolean onPreDraw() {
5061        if (mLayout == null) {
5062            assumeLayout();
5063        }
5064
5065        if (mMovement != null) {
5066            /* This code also provides auto-scrolling when a cursor is moved using a
5067             * CursorController (insertion point or selection limits).
5068             * For selection, ensure start or end is visible depending on controller's state.
5069             */
5070            int curs = getSelectionEnd();
5071            // Do not create the controller if it is not already created.
5072            if (mEditor != null && mEditor.mSelectionModifierCursorController != null &&
5073                    mEditor.mSelectionModifierCursorController.isSelectionStartDragged()) {
5074                curs = getSelectionStart();
5075            }
5076
5077            /*
5078             * TODO: This should really only keep the end in view if
5079             * it already was before the text changed.  I'm not sure
5080             * of a good way to tell from here if it was.
5081             */
5082            if (curs < 0 && (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
5083                curs = mText.length();
5084            }
5085
5086            if (curs >= 0) {
5087                bringPointIntoView(curs);
5088            }
5089        } else {
5090            bringTextIntoView();
5091        }
5092
5093        // This has to be checked here since:
5094        // - onFocusChanged cannot start it when focus is given to a view with selected text (after
5095        //   a screen rotation) since layout is not yet initialized at that point.
5096        if (mEditor != null && mEditor.mCreatedWithASelection) {
5097            mEditor.startSelectionActionMode();
5098            mEditor.mCreatedWithASelection = false;
5099        }
5100
5101        // Phone specific code (there is no ExtractEditText on tablets).
5102        // ExtractEditText does not call onFocus when it is displayed, and mHasSelectionOnFocus can
5103        // not be set. Do the test here instead.
5104        if (this instanceof ExtractEditText && hasSelection() && mEditor != null) {
5105            mEditor.startSelectionActionMode();
5106        }
5107
5108        unregisterForPreDraw();
5109
5110        return true;
5111    }
5112
5113    @Override
5114    protected void onAttachedToWindow() {
5115        super.onAttachedToWindow();
5116
5117        mTemporaryDetach = false;
5118
5119        if (mEditor != null) mEditor.onAttachedToWindow();
5120
5121        if (mPreDrawListenerDetached) {
5122            getViewTreeObserver().addOnPreDrawListener(this);
5123            mPreDrawListenerDetached = false;
5124        }
5125    }
5126
5127    /** @hide */
5128    @Override
5129    protected void onDetachedFromWindowInternal() {
5130        if (mPreDrawRegistered) {
5131            getViewTreeObserver().removeOnPreDrawListener(this);
5132            mPreDrawListenerDetached = true;
5133        }
5134
5135        resetResolvedDrawables();
5136
5137        if (mEditor != null) mEditor.onDetachedFromWindow();
5138
5139        super.onDetachedFromWindowInternal();
5140    }
5141
5142    @Override
5143    public void onScreenStateChanged(int screenState) {
5144        super.onScreenStateChanged(screenState);
5145        if (mEditor != null) mEditor.onScreenStateChanged(screenState);
5146    }
5147
5148    @Override
5149    protected boolean isPaddingOffsetRequired() {
5150        return mShadowRadius != 0 || mDrawables != null;
5151    }
5152
5153    @Override
5154    protected int getLeftPaddingOffset() {
5155        return getCompoundPaddingLeft() - mPaddingLeft +
5156                (int) Math.min(0, mShadowDx - mShadowRadius);
5157    }
5158
5159    @Override
5160    protected int getTopPaddingOffset() {
5161        return (int) Math.min(0, mShadowDy - mShadowRadius);
5162    }
5163
5164    @Override
5165    protected int getBottomPaddingOffset() {
5166        return (int) Math.max(0, mShadowDy + mShadowRadius);
5167    }
5168
5169    private int getFudgedPaddingRight() {
5170        // Add sufficient space for cursor and tone marks
5171        int cursorWidth = 2 + (int)mTextPaint.density; // adequate for Material cursors
5172        return Math.max(0, getCompoundPaddingRight() - (cursorWidth - 1));
5173    }
5174
5175    @Override
5176    protected int getRightPaddingOffset() {
5177        return -(getFudgedPaddingRight() - mPaddingRight) +
5178                (int) Math.max(0, mShadowDx + mShadowRadius);
5179    }
5180
5181    @Override
5182    protected boolean verifyDrawable(Drawable who) {
5183        final boolean verified = super.verifyDrawable(who);
5184        if (!verified && mDrawables != null) {
5185            for (Drawable dr : mDrawables.mShowing) {
5186                if (who == dr) {
5187                    return true;
5188                }
5189            }
5190        }
5191        return verified;
5192    }
5193
5194    @Override
5195    public void jumpDrawablesToCurrentState() {
5196        super.jumpDrawablesToCurrentState();
5197        if (mDrawables != null) {
5198            for (Drawable dr : mDrawables.mShowing) {
5199                if (dr != null) {
5200                    dr.jumpToCurrentState();
5201                }
5202            }
5203        }
5204    }
5205
5206    @Override
5207    public void invalidateDrawable(Drawable drawable) {
5208        boolean handled = false;
5209
5210        if (verifyDrawable(drawable)) {
5211            final Rect dirty = drawable.getBounds();
5212            int scrollX = mScrollX;
5213            int scrollY = mScrollY;
5214
5215            // IMPORTANT: The coordinates below are based on the coordinates computed
5216            // for each compound drawable in onDraw(). Make sure to update each section
5217            // accordingly.
5218            final TextView.Drawables drawables = mDrawables;
5219            if (drawables != null) {
5220                if (drawable == drawables.mShowing[Drawables.LEFT]) {
5221                    final int compoundPaddingTop = getCompoundPaddingTop();
5222                    final int compoundPaddingBottom = getCompoundPaddingBottom();
5223                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
5224
5225                    scrollX += mPaddingLeft;
5226                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightLeft) / 2;
5227                    handled = true;
5228                } else if (drawable == drawables.mShowing[Drawables.RIGHT]) {
5229                    final int compoundPaddingTop = getCompoundPaddingTop();
5230                    final int compoundPaddingBottom = getCompoundPaddingBottom();
5231                    final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
5232
5233                    scrollX += (mRight - mLeft - mPaddingRight - drawables.mDrawableSizeRight);
5234                    scrollY += compoundPaddingTop + (vspace - drawables.mDrawableHeightRight) / 2;
5235                    handled = true;
5236                } else if (drawable == drawables.mShowing[Drawables.TOP]) {
5237                    final int compoundPaddingLeft = getCompoundPaddingLeft();
5238                    final int compoundPaddingRight = getCompoundPaddingRight();
5239                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
5240
5241                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthTop) / 2;
5242                    scrollY += mPaddingTop;
5243                    handled = true;
5244                } else if (drawable == drawables.mShowing[Drawables.BOTTOM]) {
5245                    final int compoundPaddingLeft = getCompoundPaddingLeft();
5246                    final int compoundPaddingRight = getCompoundPaddingRight();
5247                    final int hspace = mRight - mLeft - compoundPaddingRight - compoundPaddingLeft;
5248
5249                    scrollX += compoundPaddingLeft + (hspace - drawables.mDrawableWidthBottom) / 2;
5250                    scrollY += (mBottom - mTop - mPaddingBottom - drawables.mDrawableSizeBottom);
5251                    handled = true;
5252                }
5253            }
5254
5255            if (handled) {
5256                invalidate(dirty.left + scrollX, dirty.top + scrollY,
5257                        dirty.right + scrollX, dirty.bottom + scrollY);
5258            }
5259        }
5260
5261        if (!handled) {
5262            super.invalidateDrawable(drawable);
5263        }
5264    }
5265
5266    @Override
5267    public boolean hasOverlappingRendering() {
5268        // horizontal fading edge causes SaveLayerAlpha, which doesn't support alpha modulation
5269        return ((getBackground() != null && getBackground().getCurrent() != null)
5270                || mText instanceof Spannable || hasSelection()
5271                || isHorizontalFadingEdgeEnabled());
5272    }
5273
5274    /**
5275     *
5276     * Returns the state of the {@code textIsSelectable} flag (See
5277     * {@link #setTextIsSelectable setTextIsSelectable()}). Although you have to set this flag
5278     * to allow users to select and copy text in a non-editable TextView, the content of an
5279     * {@link EditText} can always be selected, independently of the value of this flag.
5280     * <p>
5281     *
5282     * @return True if the text displayed in this TextView can be selected by the user.
5283     *
5284     * @attr ref android.R.styleable#TextView_textIsSelectable
5285     */
5286    public boolean isTextSelectable() {
5287        return mEditor == null ? false : mEditor.mTextIsSelectable;
5288    }
5289
5290    /**
5291     * Sets whether the content of this view is selectable by the user. The default is
5292     * {@code false}, meaning that the content is not selectable.
5293     * <p>
5294     * When you use a TextView to display a useful piece of information to the user (such as a
5295     * contact's address), make it selectable, so that the user can select and copy its
5296     * content. You can also use set the XML attribute
5297     * {@link android.R.styleable#TextView_textIsSelectable} to "true".
5298     * <p>
5299     * When you call this method to set the value of {@code textIsSelectable}, it sets
5300     * the flags {@code focusable}, {@code focusableInTouchMode}, {@code clickable},
5301     * and {@code longClickable} to the same value. These flags correspond to the attributes
5302     * {@link android.R.styleable#View_focusable android:focusable},
5303     * {@link android.R.styleable#View_focusableInTouchMode android:focusableInTouchMode},
5304     * {@link android.R.styleable#View_clickable android:clickable}, and
5305     * {@link android.R.styleable#View_longClickable android:longClickable}. To restore any of these
5306     * flags to a state you had set previously, call one or more of the following methods:
5307     * {@link #setFocusable(boolean) setFocusable()},
5308     * {@link #setFocusableInTouchMode(boolean) setFocusableInTouchMode()},
5309     * {@link #setClickable(boolean) setClickable()} or
5310     * {@link #setLongClickable(boolean) setLongClickable()}.
5311     *
5312     * @param selectable Whether the content of this TextView should be selectable.
5313     */
5314    public void setTextIsSelectable(boolean selectable) {
5315        if (!selectable && mEditor == null) return; // false is default value with no edit data
5316
5317        createEditorIfNeeded();
5318        if (mEditor.mTextIsSelectable == selectable) return;
5319
5320        mEditor.mTextIsSelectable = selectable;
5321        setFocusableInTouchMode(selectable);
5322        setFocusable(selectable);
5323        setClickable(selectable);
5324        setLongClickable(selectable);
5325
5326        // mInputType should already be EditorInfo.TYPE_NULL and mInput should be null
5327
5328        setMovementMethod(selectable ? ArrowKeyMovementMethod.getInstance() : null);
5329        setText(mText, selectable ? BufferType.SPANNABLE : BufferType.NORMAL);
5330
5331        // Called by setText above, but safer in case of future code changes
5332        mEditor.prepareCursorControllers();
5333    }
5334
5335    @Override
5336    protected int[] onCreateDrawableState(int extraSpace) {
5337        final int[] drawableState;
5338
5339        if (mSingleLine) {
5340            drawableState = super.onCreateDrawableState(extraSpace);
5341        } else {
5342            drawableState = super.onCreateDrawableState(extraSpace + 1);
5343            mergeDrawableStates(drawableState, MULTILINE_STATE_SET);
5344        }
5345
5346        if (isTextSelectable()) {
5347            // Disable pressed state, which was introduced when TextView was made clickable.
5348            // Prevents text color change.
5349            // setClickable(false) would have a similar effect, but it also disables focus changes
5350            // and long press actions, which are both needed by text selection.
5351            final int length = drawableState.length;
5352            for (int i = 0; i < length; i++) {
5353                if (drawableState[i] == R.attr.state_pressed) {
5354                    final int[] nonPressedState = new int[length - 1];
5355                    System.arraycopy(drawableState, 0, nonPressedState, 0, i);
5356                    System.arraycopy(drawableState, i + 1, nonPressedState, i, length - i - 1);
5357                    return nonPressedState;
5358                }
5359            }
5360        }
5361
5362        return drawableState;
5363    }
5364
5365    private Path getUpdatedHighlightPath() {
5366        Path highlight = null;
5367        Paint highlightPaint = mHighlightPaint;
5368
5369        final int selStart = getSelectionStart();
5370        final int selEnd = getSelectionEnd();
5371        if (mMovement != null && (isFocused() || isPressed()) && selStart >= 0) {
5372            if (selStart == selEnd) {
5373                if (mEditor != null && mEditor.isCursorVisible() &&
5374                        (SystemClock.uptimeMillis() - mEditor.mShowCursor) %
5375                        (2 * Editor.BLINK) < Editor.BLINK) {
5376                    if (mHighlightPathBogus) {
5377                        if (mHighlightPath == null) mHighlightPath = new Path();
5378                        mHighlightPath.reset();
5379                        mLayout.getCursorPath(selStart, mHighlightPath, mText);
5380                        mEditor.updateCursorsPositions();
5381                        mHighlightPathBogus = false;
5382                    }
5383
5384                    // XXX should pass to skin instead of drawing directly
5385                    highlightPaint.setColor(mCurTextColor);
5386                    highlightPaint.setStyle(Paint.Style.STROKE);
5387                    highlight = mHighlightPath;
5388                }
5389            } else {
5390                if (mHighlightPathBogus) {
5391                    if (mHighlightPath == null) mHighlightPath = new Path();
5392                    mHighlightPath.reset();
5393                    mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
5394                    mHighlightPathBogus = false;
5395                }
5396
5397                // XXX should pass to skin instead of drawing directly
5398                highlightPaint.setColor(mHighlightColor);
5399                highlightPaint.setStyle(Paint.Style.FILL);
5400
5401                highlight = mHighlightPath;
5402            }
5403        }
5404        return highlight;
5405    }
5406
5407    /**
5408     * @hide
5409     */
5410    public int getHorizontalOffsetForDrawables() {
5411        return 0;
5412    }
5413
5414    @Override
5415    protected void onDraw(Canvas canvas) {
5416        restartMarqueeIfNeeded();
5417
5418        // Draw the background for this view
5419        super.onDraw(canvas);
5420
5421        final int compoundPaddingLeft = getCompoundPaddingLeft();
5422        final int compoundPaddingTop = getCompoundPaddingTop();
5423        final int compoundPaddingRight = getCompoundPaddingRight();
5424        final int compoundPaddingBottom = getCompoundPaddingBottom();
5425        final int scrollX = mScrollX;
5426        final int scrollY = mScrollY;
5427        final int right = mRight;
5428        final int left = mLeft;
5429        final int bottom = mBottom;
5430        final int top = mTop;
5431        final boolean isLayoutRtl = isLayoutRtl();
5432        final int offset = getHorizontalOffsetForDrawables();
5433        final int leftOffset = isLayoutRtl ? 0 : offset;
5434        final int rightOffset = isLayoutRtl ? offset : 0 ;
5435
5436        final Drawables dr = mDrawables;
5437        if (dr != null) {
5438            /*
5439             * Compound, not extended, because the icon is not clipped
5440             * if the text height is smaller.
5441             */
5442
5443            int vspace = bottom - top - compoundPaddingBottom - compoundPaddingTop;
5444            int hspace = right - left - compoundPaddingRight - compoundPaddingLeft;
5445
5446            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
5447            // Make sure to update invalidateDrawable() when changing this code.
5448            if (dr.mShowing[Drawables.LEFT] != null) {
5449                canvas.save();
5450                canvas.translate(scrollX + mPaddingLeft + leftOffset,
5451                                 scrollY + compoundPaddingTop +
5452                                 (vspace - dr.mDrawableHeightLeft) / 2);
5453                dr.mShowing[Drawables.LEFT].draw(canvas);
5454                canvas.restore();
5455            }
5456
5457            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
5458            // Make sure to update invalidateDrawable() when changing this code.
5459            if (dr.mShowing[Drawables.RIGHT] != null) {
5460                canvas.save();
5461                canvas.translate(scrollX + right - left - mPaddingRight
5462                        - dr.mDrawableSizeRight - rightOffset,
5463                         scrollY + compoundPaddingTop + (vspace - dr.mDrawableHeightRight) / 2);
5464                dr.mShowing[Drawables.RIGHT].draw(canvas);
5465                canvas.restore();
5466            }
5467
5468            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
5469            // Make sure to update invalidateDrawable() when changing this code.
5470            if (dr.mShowing[Drawables.TOP] != null) {
5471                canvas.save();
5472                canvas.translate(scrollX + compoundPaddingLeft +
5473                        (hspace - dr.mDrawableWidthTop) / 2, scrollY + mPaddingTop);
5474                dr.mShowing[Drawables.TOP].draw(canvas);
5475                canvas.restore();
5476            }
5477
5478            // IMPORTANT: The coordinates computed are also used in invalidateDrawable()
5479            // Make sure to update invalidateDrawable() when changing this code.
5480            if (dr.mShowing[Drawables.BOTTOM] != null) {
5481                canvas.save();
5482                canvas.translate(scrollX + compoundPaddingLeft +
5483                        (hspace - dr.mDrawableWidthBottom) / 2,
5484                         scrollY + bottom - top - mPaddingBottom - dr.mDrawableSizeBottom);
5485                dr.mShowing[Drawables.BOTTOM].draw(canvas);
5486                canvas.restore();
5487            }
5488        }
5489
5490        int color = mCurTextColor;
5491
5492        if (mLayout == null) {
5493            assumeLayout();
5494        }
5495
5496        Layout layout = mLayout;
5497
5498        if (mHint != null && mText.length() == 0) {
5499            if (mHintTextColor != null) {
5500                color = mCurHintTextColor;
5501            }
5502
5503            layout = mHintLayout;
5504        }
5505
5506        mTextPaint.setColor(color);
5507        mTextPaint.drawableState = getDrawableState();
5508
5509        canvas.save();
5510        /*  Would be faster if we didn't have to do this. Can we chop the
5511            (displayable) text so that we don't need to do this ever?
5512        */
5513
5514        int extendedPaddingTop = getExtendedPaddingTop();
5515        int extendedPaddingBottom = getExtendedPaddingBottom();
5516
5517        final int vspace = mBottom - mTop - compoundPaddingBottom - compoundPaddingTop;
5518        final int maxScrollY = mLayout.getHeight() - vspace;
5519
5520        float clipLeft = compoundPaddingLeft + scrollX;
5521        float clipTop = (scrollY == 0) ? 0 : extendedPaddingTop + scrollY;
5522        float clipRight = right - left - getFudgedPaddingRight() + scrollX;
5523        float clipBottom = bottom - top + scrollY -
5524                ((scrollY == maxScrollY) ? 0 : extendedPaddingBottom);
5525
5526        if (mShadowRadius != 0) {
5527            clipLeft += Math.min(0, mShadowDx - mShadowRadius);
5528            clipRight += Math.max(0, mShadowDx + mShadowRadius);
5529
5530            clipTop += Math.min(0, mShadowDy - mShadowRadius);
5531            clipBottom += Math.max(0, mShadowDy + mShadowRadius);
5532        }
5533
5534        canvas.clipRect(clipLeft, clipTop, clipRight, clipBottom);
5535
5536        int voffsetText = 0;
5537        int voffsetCursor = 0;
5538
5539        // translate in by our padding
5540        /* shortcircuit calling getVerticaOffset() */
5541        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5542            voffsetText = getVerticalOffset(false);
5543            voffsetCursor = getVerticalOffset(true);
5544        }
5545        canvas.translate(compoundPaddingLeft, extendedPaddingTop + voffsetText);
5546
5547        final int layoutDirection = getLayoutDirection();
5548        final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
5549        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
5550                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
5551            if (!mSingleLine && getLineCount() == 1 && canMarquee() &&
5552                    (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) != Gravity.LEFT) {
5553                final int width = mRight - mLeft;
5554                final int padding = getCompoundPaddingLeft() + getCompoundPaddingRight();
5555                final float dx = mLayout.getLineRight(0) - (width - padding);
5556                canvas.translate(layout.getParagraphDirection(0) * dx, 0.0f);
5557            }
5558
5559            if (mMarquee != null && mMarquee.isRunning()) {
5560                final float dx = -mMarquee.getScroll();
5561                canvas.translate(layout.getParagraphDirection(0) * dx, 0.0f);
5562            }
5563        }
5564
5565        final int cursorOffsetVertical = voffsetCursor - voffsetText;
5566
5567        Path highlight = getUpdatedHighlightPath();
5568        if (mEditor != null) {
5569            mEditor.onDraw(canvas, layout, highlight, mHighlightPaint, cursorOffsetVertical);
5570        } else {
5571            layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
5572        }
5573
5574        if (mMarquee != null && mMarquee.shouldDrawGhost()) {
5575            final float dx = mMarquee.getGhostOffset();
5576            canvas.translate(layout.getParagraphDirection(0) * dx, 0.0f);
5577            layout.draw(canvas, highlight, mHighlightPaint, cursorOffsetVertical);
5578        }
5579
5580        canvas.restore();
5581    }
5582
5583    @Override
5584    public void getFocusedRect(Rect r) {
5585        if (mLayout == null) {
5586            super.getFocusedRect(r);
5587            return;
5588        }
5589
5590        int selEnd = getSelectionEnd();
5591        if (selEnd < 0) {
5592            super.getFocusedRect(r);
5593            return;
5594        }
5595
5596        int selStart = getSelectionStart();
5597        if (selStart < 0 || selStart >= selEnd) {
5598            int line = mLayout.getLineForOffset(selEnd);
5599            r.top = mLayout.getLineTop(line);
5600            r.bottom = mLayout.getLineBottom(line);
5601            r.left = (int) mLayout.getPrimaryHorizontal(selEnd) - 2;
5602            r.right = r.left + 4;
5603        } else {
5604            int lineStart = mLayout.getLineForOffset(selStart);
5605            int lineEnd = mLayout.getLineForOffset(selEnd);
5606            r.top = mLayout.getLineTop(lineStart);
5607            r.bottom = mLayout.getLineBottom(lineEnd);
5608            if (lineStart == lineEnd) {
5609                r.left = (int) mLayout.getPrimaryHorizontal(selStart);
5610                r.right = (int) mLayout.getPrimaryHorizontal(selEnd);
5611            } else {
5612                // Selection extends across multiple lines -- make the focused
5613                // rect cover the entire width.
5614                if (mHighlightPathBogus) {
5615                    if (mHighlightPath == null) mHighlightPath = new Path();
5616                    mHighlightPath.reset();
5617                    mLayout.getSelectionPath(selStart, selEnd, mHighlightPath);
5618                    mHighlightPathBogus = false;
5619                }
5620                synchronized (TEMP_RECTF) {
5621                    mHighlightPath.computeBounds(TEMP_RECTF, true);
5622                    r.left = (int)TEMP_RECTF.left-1;
5623                    r.right = (int)TEMP_RECTF.right+1;
5624                }
5625            }
5626        }
5627
5628        // Adjust for padding and gravity.
5629        int paddingLeft = getCompoundPaddingLeft();
5630        int paddingTop = getExtendedPaddingTop();
5631        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5632            paddingTop += getVerticalOffset(false);
5633        }
5634        r.offset(paddingLeft, paddingTop);
5635        int paddingBottom = getExtendedPaddingBottom();
5636        r.bottom += paddingBottom;
5637    }
5638
5639    /**
5640     * Return the number of lines of text, or 0 if the internal Layout has not
5641     * been built.
5642     */
5643    public int getLineCount() {
5644        return mLayout != null ? mLayout.getLineCount() : 0;
5645    }
5646
5647    /**
5648     * Return the baseline for the specified line (0...getLineCount() - 1)
5649     * If bounds is not null, return the top, left, right, bottom extents
5650     * of the specified line in it. If the internal Layout has not been built,
5651     * return 0 and set bounds to (0, 0, 0, 0)
5652     * @param line which line to examine (0..getLineCount() - 1)
5653     * @param bounds Optional. If not null, it returns the extent of the line
5654     * @return the Y-coordinate of the baseline
5655     */
5656    public int getLineBounds(int line, Rect bounds) {
5657        if (mLayout == null) {
5658            if (bounds != null) {
5659                bounds.set(0, 0, 0, 0);
5660            }
5661            return 0;
5662        }
5663        else {
5664            int baseline = mLayout.getLineBounds(line, bounds);
5665
5666            int voffset = getExtendedPaddingTop();
5667            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5668                voffset += getVerticalOffset(true);
5669            }
5670            if (bounds != null) {
5671                bounds.offset(getCompoundPaddingLeft(), voffset);
5672            }
5673            return baseline + voffset;
5674        }
5675    }
5676
5677    @Override
5678    public int getBaseline() {
5679        if (mLayout == null) {
5680            return super.getBaseline();
5681        }
5682
5683        int voffset = 0;
5684        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5685            voffset = getVerticalOffset(true);
5686        }
5687
5688        if (isLayoutModeOptical(mParent)) {
5689            voffset -= getOpticalInsets().top;
5690        }
5691
5692        return getExtendedPaddingTop() + voffset + mLayout.getLineBaseline(0);
5693    }
5694
5695    /**
5696     * @hide
5697     */
5698    @Override
5699    protected int getFadeTop(boolean offsetRequired) {
5700        if (mLayout == null) return 0;
5701
5702        int voffset = 0;
5703        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
5704            voffset = getVerticalOffset(true);
5705        }
5706
5707        if (offsetRequired) voffset += getTopPaddingOffset();
5708
5709        return getExtendedPaddingTop() + voffset;
5710    }
5711
5712    /**
5713     * @hide
5714     */
5715    @Override
5716    protected int getFadeHeight(boolean offsetRequired) {
5717        return mLayout != null ? mLayout.getHeight() : 0;
5718    }
5719
5720    @Override
5721    public boolean onKeyPreIme(int keyCode, KeyEvent event) {
5722        if (keyCode == KeyEvent.KEYCODE_BACK) {
5723            boolean isInSelectionMode = mEditor != null && mEditor.mSelectionActionMode != null;
5724
5725            if (isInSelectionMode) {
5726                if (event.getAction() == KeyEvent.ACTION_DOWN && event.getRepeatCount() == 0) {
5727                    KeyEvent.DispatcherState state = getKeyDispatcherState();
5728                    if (state != null) {
5729                        state.startTracking(event, this);
5730                    }
5731                    return true;
5732                } else if (event.getAction() == KeyEvent.ACTION_UP) {
5733                    KeyEvent.DispatcherState state = getKeyDispatcherState();
5734                    if (state != null) {
5735                        state.handleUpEvent(event);
5736                    }
5737                    if (event.isTracking() && !event.isCanceled()) {
5738                        stopSelectionActionMode();
5739                        return true;
5740                    }
5741                }
5742            }
5743        }
5744        return super.onKeyPreIme(keyCode, event);
5745    }
5746
5747    @Override
5748    public boolean onKeyDown(int keyCode, KeyEvent event) {
5749        int which = doKeyDown(keyCode, event, null);
5750        if (which == 0) {
5751            return super.onKeyDown(keyCode, event);
5752        }
5753
5754        return true;
5755    }
5756
5757    @Override
5758    public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) {
5759        KeyEvent down = KeyEvent.changeAction(event, KeyEvent.ACTION_DOWN);
5760
5761        int which = doKeyDown(keyCode, down, event);
5762        if (which == 0) {
5763            // Go through default dispatching.
5764            return super.onKeyMultiple(keyCode, repeatCount, event);
5765        }
5766        if (which == -1) {
5767            // Consumed the whole thing.
5768            return true;
5769        }
5770
5771        repeatCount--;
5772
5773        // We are going to dispatch the remaining events to either the input
5774        // or movement method.  To do this, we will just send a repeated stream
5775        // of down and up events until we have done the complete repeatCount.
5776        // It would be nice if those interfaces had an onKeyMultiple() method,
5777        // but adding that is a more complicated change.
5778        KeyEvent up = KeyEvent.changeAction(event, KeyEvent.ACTION_UP);
5779        if (which == 1) {
5780            // mEditor and mEditor.mInput are not null from doKeyDown
5781            mEditor.mKeyListener.onKeyUp(this, (Editable)mText, keyCode, up);
5782            while (--repeatCount > 0) {
5783                mEditor.mKeyListener.onKeyDown(this, (Editable)mText, keyCode, down);
5784                mEditor.mKeyListener.onKeyUp(this, (Editable)mText, keyCode, up);
5785            }
5786            hideErrorIfUnchanged();
5787
5788        } else if (which == 2) {
5789            // mMovement is not null from doKeyDown
5790            mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
5791            while (--repeatCount > 0) {
5792                mMovement.onKeyDown(this, (Spannable)mText, keyCode, down);
5793                mMovement.onKeyUp(this, (Spannable)mText, keyCode, up);
5794            }
5795        }
5796
5797        return true;
5798    }
5799
5800    /**
5801     * Returns true if pressing ENTER in this field advances focus instead
5802     * of inserting the character.  This is true mostly in single-line fields,
5803     * but also in mail addresses and subjects which will display on multiple
5804     * lines but where it doesn't make sense to insert newlines.
5805     */
5806    private boolean shouldAdvanceFocusOnEnter() {
5807        if (getKeyListener() == null) {
5808            return false;
5809        }
5810
5811        if (mSingleLine) {
5812            return true;
5813        }
5814
5815        if (mEditor != null &&
5816                (mEditor.mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
5817            int variation = mEditor.mInputType & EditorInfo.TYPE_MASK_VARIATION;
5818            if (variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_ADDRESS
5819                    || variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT) {
5820                return true;
5821            }
5822        }
5823
5824        return false;
5825    }
5826
5827    /**
5828     * Returns true if pressing TAB in this field advances focus instead
5829     * of inserting the character.  Insert tabs only in multi-line editors.
5830     */
5831    private boolean shouldAdvanceFocusOnTab() {
5832        if (getKeyListener() != null && !mSingleLine && mEditor != null &&
5833                (mEditor.mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
5834            int variation = mEditor.mInputType & EditorInfo.TYPE_MASK_VARIATION;
5835            if (variation == EditorInfo.TYPE_TEXT_FLAG_IME_MULTI_LINE
5836                    || variation == EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE) {
5837                return false;
5838            }
5839        }
5840        return true;
5841    }
5842
5843    private int doKeyDown(int keyCode, KeyEvent event, KeyEvent otherEvent) {
5844        if (!isEnabled()) {
5845            return 0;
5846        }
5847
5848        // If this is the initial keydown, we don't want to prevent a movement away from this view.
5849        // While this shouldn't be necessary because any time we're preventing default movement we
5850        // should be restricting the focus to remain within this view, thus we'll also receive
5851        // the key up event, occasionally key up events will get dropped and we don't want to
5852        // prevent the user from traversing out of this on the next key down.
5853        if (event.getRepeatCount() == 0 && !KeyEvent.isModifierKey(keyCode)) {
5854            mPreventDefaultMovement = false;
5855        }
5856
5857        switch (keyCode) {
5858            case KeyEvent.KEYCODE_ENTER:
5859                if (event.hasNoModifiers()) {
5860                    // When mInputContentType is set, we know that we are
5861                    // running in a "modern" cupcake environment, so don't need
5862                    // to worry about the application trying to capture
5863                    // enter key events.
5864                    if (mEditor != null && mEditor.mInputContentType != null) {
5865                        // If there is an action listener, given them a
5866                        // chance to consume the event.
5867                        if (mEditor.mInputContentType.onEditorActionListener != null &&
5868                                mEditor.mInputContentType.onEditorActionListener.onEditorAction(
5869                                this, EditorInfo.IME_NULL, event)) {
5870                            mEditor.mInputContentType.enterDown = true;
5871                            // We are consuming the enter key for them.
5872                            return -1;
5873                        }
5874                    }
5875
5876                    // If our editor should move focus when enter is pressed, or
5877                    // this is a generated event from an IME action button, then
5878                    // don't let it be inserted into the text.
5879                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
5880                            || shouldAdvanceFocusOnEnter()) {
5881                        if (hasOnClickListeners()) {
5882                            return 0;
5883                        }
5884                        return -1;
5885                    }
5886                }
5887                break;
5888
5889            case KeyEvent.KEYCODE_DPAD_CENTER:
5890                if (event.hasNoModifiers()) {
5891                    if (shouldAdvanceFocusOnEnter()) {
5892                        return 0;
5893                    }
5894                }
5895                break;
5896
5897            case KeyEvent.KEYCODE_TAB:
5898                if (event.hasNoModifiers() || event.hasModifiers(KeyEvent.META_SHIFT_ON)) {
5899                    if (shouldAdvanceFocusOnTab()) {
5900                        return 0;
5901                    }
5902                }
5903                break;
5904
5905                // Has to be done on key down (and not on key up) to correctly be intercepted.
5906            case KeyEvent.KEYCODE_BACK:
5907                if (mEditor != null && mEditor.mSelectionActionMode != null) {
5908                    stopSelectionActionMode();
5909                    return -1;
5910                }
5911                break;
5912        }
5913
5914        if (mEditor != null && mEditor.mKeyListener != null) {
5915            boolean doDown = true;
5916            if (otherEvent != null) {
5917                try {
5918                    beginBatchEdit();
5919                    final boolean handled = mEditor.mKeyListener.onKeyOther(this, (Editable) mText,
5920                            otherEvent);
5921                    hideErrorIfUnchanged();
5922                    doDown = false;
5923                    if (handled) {
5924                        return -1;
5925                    }
5926                } catch (AbstractMethodError e) {
5927                    // onKeyOther was added after 1.0, so if it isn't
5928                    // implemented we need to try to dispatch as a regular down.
5929                } finally {
5930                    endBatchEdit();
5931                }
5932            }
5933
5934            if (doDown) {
5935                beginBatchEdit();
5936                final boolean handled = mEditor.mKeyListener.onKeyDown(this, (Editable) mText,
5937                        keyCode, event);
5938                endBatchEdit();
5939                hideErrorIfUnchanged();
5940                if (handled) return 1;
5941            }
5942        }
5943
5944        // bug 650865: sometimes we get a key event before a layout.
5945        // don't try to move around if we don't know the layout.
5946
5947        if (mMovement != null && mLayout != null) {
5948            boolean doDown = true;
5949            if (otherEvent != null) {
5950                try {
5951                    boolean handled = mMovement.onKeyOther(this, (Spannable) mText,
5952                            otherEvent);
5953                    doDown = false;
5954                    if (handled) {
5955                        return -1;
5956                    }
5957                } catch (AbstractMethodError e) {
5958                    // onKeyOther was added after 1.0, so if it isn't
5959                    // implemented we need to try to dispatch as a regular down.
5960                }
5961            }
5962            if (doDown) {
5963                if (mMovement.onKeyDown(this, (Spannable)mText, keyCode, event)) {
5964                    if (event.getRepeatCount() == 0 && !KeyEvent.isModifierKey(keyCode)) {
5965                        mPreventDefaultMovement = true;
5966                    }
5967                    return 2;
5968                }
5969            }
5970        }
5971
5972        return mPreventDefaultMovement && !KeyEvent.isModifierKey(keyCode) ? -1 : 0;
5973    }
5974
5975    /**
5976     * Resets the mErrorWasChanged flag, so that future calls to {@link #setError(CharSequence)}
5977     * can be recorded.
5978     * @hide
5979     */
5980    public void resetErrorChangedFlag() {
5981        /*
5982         * Keep track of what the error was before doing the input
5983         * so that if an input filter changed the error, we leave
5984         * that error showing.  Otherwise, we take down whatever
5985         * error was showing when the user types something.
5986         */
5987        if (mEditor != null) mEditor.mErrorWasChanged = false;
5988    }
5989
5990    /**
5991     * @hide
5992     */
5993    public void hideErrorIfUnchanged() {
5994        if (mEditor != null && mEditor.mError != null && !mEditor.mErrorWasChanged) {
5995            setError(null, null);
5996        }
5997    }
5998
5999    @Override
6000    public boolean onKeyUp(int keyCode, KeyEvent event) {
6001        if (!isEnabled()) {
6002            return super.onKeyUp(keyCode, event);
6003        }
6004
6005        if (!KeyEvent.isModifierKey(keyCode)) {
6006            mPreventDefaultMovement = false;
6007        }
6008
6009        switch (keyCode) {
6010            case KeyEvent.KEYCODE_DPAD_CENTER:
6011                if (event.hasNoModifiers()) {
6012                    /*
6013                     * If there is a click listener, just call through to
6014                     * super, which will invoke it.
6015                     *
6016                     * If there isn't a click listener, try to show the soft
6017                     * input method.  (It will also
6018                     * call performClick(), but that won't do anything in
6019                     * this case.)
6020                     */
6021                    if (!hasOnClickListeners()) {
6022                        if (mMovement != null && mText instanceof Editable
6023                                && mLayout != null && onCheckIsTextEditor()) {
6024                            InputMethodManager imm = InputMethodManager.peekInstance();
6025                            viewClicked(imm);
6026                            if (imm != null && getShowSoftInputOnFocus()) {
6027                                imm.showSoftInput(this, 0);
6028                            }
6029                        }
6030                    }
6031                }
6032                return super.onKeyUp(keyCode, event);
6033
6034            case KeyEvent.KEYCODE_ENTER:
6035                if (event.hasNoModifiers()) {
6036                    if (mEditor != null && mEditor.mInputContentType != null
6037                            && mEditor.mInputContentType.onEditorActionListener != null
6038                            && mEditor.mInputContentType.enterDown) {
6039                        mEditor.mInputContentType.enterDown = false;
6040                        if (mEditor.mInputContentType.onEditorActionListener.onEditorAction(
6041                                this, EditorInfo.IME_NULL, event)) {
6042                            return true;
6043                        }
6044                    }
6045
6046                    if ((event.getFlags() & KeyEvent.FLAG_EDITOR_ACTION) != 0
6047                            || shouldAdvanceFocusOnEnter()) {
6048                        /*
6049                         * If there is a click listener, just call through to
6050                         * super, which will invoke it.
6051                         *
6052                         * If there isn't a click listener, try to advance focus,
6053                         * but still call through to super, which will reset the
6054                         * pressed state and longpress state.  (It will also
6055                         * call performClick(), but that won't do anything in
6056                         * this case.)
6057                         */
6058                        if (!hasOnClickListeners()) {
6059                            View v = focusSearch(FOCUS_DOWN);
6060
6061                            if (v != null) {
6062                                if (!v.requestFocus(FOCUS_DOWN)) {
6063                                    throw new IllegalStateException(
6064                                            "focus search returned a view " +
6065                                            "that wasn't able to take focus!");
6066                                }
6067
6068                                /*
6069                                 * Return true because we handled the key; super
6070                                 * will return false because there was no click
6071                                 * listener.
6072                                 */
6073                                super.onKeyUp(keyCode, event);
6074                                return true;
6075                            } else if ((event.getFlags()
6076                                    & KeyEvent.FLAG_EDITOR_ACTION) != 0) {
6077                                // No target for next focus, but make sure the IME
6078                                // if this came from it.
6079                                InputMethodManager imm = InputMethodManager.peekInstance();
6080                                if (imm != null && imm.isActive(this)) {
6081                                    imm.hideSoftInputFromWindow(getWindowToken(), 0);
6082                                }
6083                            }
6084                        }
6085                    }
6086                    return super.onKeyUp(keyCode, event);
6087                }
6088                break;
6089        }
6090
6091        if (mEditor != null && mEditor.mKeyListener != null)
6092            if (mEditor.mKeyListener.onKeyUp(this, (Editable) mText, keyCode, event))
6093                return true;
6094
6095        if (mMovement != null && mLayout != null)
6096            if (mMovement.onKeyUp(this, (Spannable) mText, keyCode, event))
6097                return true;
6098
6099        return super.onKeyUp(keyCode, event);
6100    }
6101
6102    @Override
6103    public boolean onCheckIsTextEditor() {
6104        return mEditor != null && mEditor.mInputType != EditorInfo.TYPE_NULL;
6105    }
6106
6107    @Override
6108    public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
6109        if (onCheckIsTextEditor() && isEnabled()) {
6110            mEditor.createInputMethodStateIfNeeded();
6111            outAttrs.inputType = getInputType();
6112            if (mEditor.mInputContentType != null) {
6113                outAttrs.imeOptions = mEditor.mInputContentType.imeOptions;
6114                outAttrs.privateImeOptions = mEditor.mInputContentType.privateImeOptions;
6115                outAttrs.actionLabel = mEditor.mInputContentType.imeActionLabel;
6116                outAttrs.actionId = mEditor.mInputContentType.imeActionId;
6117                outAttrs.extras = mEditor.mInputContentType.extras;
6118            } else {
6119                outAttrs.imeOptions = EditorInfo.IME_NULL;
6120            }
6121            if (focusSearch(FOCUS_DOWN) != null) {
6122                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_NEXT;
6123            }
6124            if (focusSearch(FOCUS_UP) != null) {
6125                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_PREVIOUS;
6126            }
6127            if ((outAttrs.imeOptions&EditorInfo.IME_MASK_ACTION)
6128                    == EditorInfo.IME_ACTION_UNSPECIFIED) {
6129                if ((outAttrs.imeOptions&EditorInfo.IME_FLAG_NAVIGATE_NEXT) != 0) {
6130                    // An action has not been set, but the enter key will move to
6131                    // the next focus, so set the action to that.
6132                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_NEXT;
6133                } else {
6134                    // An action has not been set, and there is no focus to move
6135                    // to, so let's just supply a "done" action.
6136                    outAttrs.imeOptions |= EditorInfo.IME_ACTION_DONE;
6137                }
6138                if (!shouldAdvanceFocusOnEnter()) {
6139                    outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
6140                }
6141            }
6142            if (isMultilineInputType(outAttrs.inputType)) {
6143                // Multi-line text editors should always show an enter key.
6144                outAttrs.imeOptions |= EditorInfo.IME_FLAG_NO_ENTER_ACTION;
6145            }
6146            outAttrs.hintText = mHint;
6147            if (mText instanceof Editable) {
6148                InputConnection ic = new EditableInputConnection(this);
6149                outAttrs.initialSelStart = getSelectionStart();
6150                outAttrs.initialSelEnd = getSelectionEnd();
6151                outAttrs.initialCapsMode = ic.getCursorCapsMode(getInputType());
6152                return ic;
6153            }
6154        }
6155        return null;
6156    }
6157
6158    /**
6159     * If this TextView contains editable content, extract a portion of it
6160     * based on the information in <var>request</var> in to <var>outText</var>.
6161     * @return Returns true if the text was successfully extracted, else false.
6162     */
6163    public boolean extractText(ExtractedTextRequest request, ExtractedText outText) {
6164        createEditorIfNeeded();
6165        return mEditor.extractText(request, outText);
6166    }
6167
6168    /**
6169     * This is used to remove all style-impacting spans from text before new
6170     * extracted text is being replaced into it, so that we don't have any
6171     * lingering spans applied during the replace.
6172     */
6173    static void removeParcelableSpans(Spannable spannable, int start, int end) {
6174        Object[] spans = spannable.getSpans(start, end, ParcelableSpan.class);
6175        int i = spans.length;
6176        while (i > 0) {
6177            i--;
6178            spannable.removeSpan(spans[i]);
6179        }
6180    }
6181
6182    /**
6183     * Apply to this text view the given extracted text, as previously
6184     * returned by {@link #extractText(ExtractedTextRequest, ExtractedText)}.
6185     */
6186    public void setExtractedText(ExtractedText text) {
6187        Editable content = getEditableText();
6188        if (text.text != null) {
6189            if (content == null) {
6190                setText(text.text, TextView.BufferType.EDITABLE);
6191            } else if (text.partialStartOffset < 0) {
6192                removeParcelableSpans(content, 0, content.length());
6193                content.replace(0, content.length(), text.text);
6194            } else {
6195                final int N = content.length();
6196                int start = text.partialStartOffset;
6197                if (start > N) start = N;
6198                int end = text.partialEndOffset;
6199                if (end > N) end = N;
6200                removeParcelableSpans(content, start, end);
6201                content.replace(start, end, text.text);
6202            }
6203        }
6204
6205        // Now set the selection position...  make sure it is in range, to
6206        // avoid crashes.  If this is a partial update, it is possible that
6207        // the underlying text may have changed, causing us problems here.
6208        // Also we just don't want to trust clients to do the right thing.
6209        Spannable sp = (Spannable)getText();
6210        final int N = sp.length();
6211        int start = text.selectionStart;
6212        if (start < 0) start = 0;
6213        else if (start > N) start = N;
6214        int end = text.selectionEnd;
6215        if (end < 0) end = 0;
6216        else if (end > N) end = N;
6217        Selection.setSelection(sp, start, end);
6218
6219        // Finally, update the selection mode.
6220        if ((text.flags&ExtractedText.FLAG_SELECTING) != 0) {
6221            MetaKeyKeyListener.startSelecting(this, sp);
6222        } else {
6223            MetaKeyKeyListener.stopSelecting(this, sp);
6224        }
6225    }
6226
6227    /**
6228     * @hide
6229     */
6230    public void setExtracting(ExtractedTextRequest req) {
6231        if (mEditor.mInputMethodState != null) {
6232            mEditor.mInputMethodState.mExtractedTextRequest = req;
6233        }
6234        // This would stop a possible selection mode, but no such mode is started in case
6235        // extracted mode will start. Some text is selected though, and will trigger an action mode
6236        // in the extracted view.
6237        mEditor.hideControllers();
6238    }
6239
6240    /**
6241     * Called by the framework in response to a text completion from
6242     * the current input method, provided by it calling
6243     * {@link InputConnection#commitCompletion
6244     * InputConnection.commitCompletion()}.  The default implementation does
6245     * nothing; text views that are supporting auto-completion should override
6246     * this to do their desired behavior.
6247     *
6248     * @param text The auto complete text the user has selected.
6249     */
6250    public void onCommitCompletion(CompletionInfo text) {
6251        // intentionally empty
6252    }
6253
6254    /**
6255     * Called by the framework in response to a text auto-correction (such as fixing a typo using a
6256     * a dictionnary) from the current input method, provided by it calling
6257     * {@link InputConnection#commitCorrection} InputConnection.commitCorrection()}. The default
6258     * implementation flashes the background of the corrected word to provide feedback to the user.
6259     *
6260     * @param info The auto correct info about the text that was corrected.
6261     */
6262    public void onCommitCorrection(CorrectionInfo info) {
6263        if (mEditor != null) mEditor.onCommitCorrection(info);
6264    }
6265
6266    public void beginBatchEdit() {
6267        if (mEditor != null) mEditor.beginBatchEdit();
6268    }
6269
6270    public void endBatchEdit() {
6271        if (mEditor != null) mEditor.endBatchEdit();
6272    }
6273
6274    /**
6275     * Called by the framework in response to a request to begin a batch
6276     * of edit operations through a call to link {@link #beginBatchEdit()}.
6277     */
6278    public void onBeginBatchEdit() {
6279        // intentionally empty
6280    }
6281
6282    /**
6283     * Called by the framework in response to a request to end a batch
6284     * of edit operations through a call to link {@link #endBatchEdit}.
6285     */
6286    public void onEndBatchEdit() {
6287        // intentionally empty
6288    }
6289
6290    /**
6291     * Called by the framework in response to a private command from the
6292     * current method, provided by it calling
6293     * {@link InputConnection#performPrivateCommand
6294     * InputConnection.performPrivateCommand()}.
6295     *
6296     * @param action The action name of the command.
6297     * @param data Any additional data for the command.  This may be null.
6298     * @return Return true if you handled the command, else false.
6299     */
6300    public boolean onPrivateIMECommand(String action, Bundle data) {
6301        return false;
6302    }
6303
6304    private void nullLayouts() {
6305        if (mLayout instanceof BoringLayout && mSavedLayout == null) {
6306            mSavedLayout = (BoringLayout) mLayout;
6307        }
6308        if (mHintLayout instanceof BoringLayout && mSavedHintLayout == null) {
6309            mSavedHintLayout = (BoringLayout) mHintLayout;
6310        }
6311
6312        mSavedMarqueeModeLayout = mLayout = mHintLayout = null;
6313
6314        mBoring = mHintBoring = null;
6315
6316        // Since it depends on the value of mLayout
6317        if (mEditor != null) mEditor.prepareCursorControllers();
6318    }
6319
6320    /**
6321     * Make a new Layout based on the already-measured size of the view,
6322     * on the assumption that it was measured correctly at some point.
6323     */
6324    private void assumeLayout() {
6325        int width = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
6326
6327        if (width < 1) {
6328            width = 0;
6329        }
6330
6331        int physicalWidth = width;
6332
6333        if (mHorizontallyScrolling) {
6334            width = VERY_WIDE;
6335        }
6336
6337        makeNewLayout(width, physicalWidth, UNKNOWN_BORING, UNKNOWN_BORING,
6338                      physicalWidth, false);
6339    }
6340
6341    private Layout.Alignment getLayoutAlignment() {
6342        Layout.Alignment alignment;
6343        switch (getTextAlignment()) {
6344            case TEXT_ALIGNMENT_GRAVITY:
6345                switch (mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) {
6346                    case Gravity.START:
6347                        alignment = Layout.Alignment.ALIGN_NORMAL;
6348                        break;
6349                    case Gravity.END:
6350                        alignment = Layout.Alignment.ALIGN_OPPOSITE;
6351                        break;
6352                    case Gravity.LEFT:
6353                        alignment = Layout.Alignment.ALIGN_LEFT;
6354                        break;
6355                    case Gravity.RIGHT:
6356                        alignment = Layout.Alignment.ALIGN_RIGHT;
6357                        break;
6358                    case Gravity.CENTER_HORIZONTAL:
6359                        alignment = Layout.Alignment.ALIGN_CENTER;
6360                        break;
6361                    default:
6362                        alignment = Layout.Alignment.ALIGN_NORMAL;
6363                        break;
6364                }
6365                break;
6366            case TEXT_ALIGNMENT_TEXT_START:
6367                alignment = Layout.Alignment.ALIGN_NORMAL;
6368                break;
6369            case TEXT_ALIGNMENT_TEXT_END:
6370                alignment = Layout.Alignment.ALIGN_OPPOSITE;
6371                break;
6372            case TEXT_ALIGNMENT_CENTER:
6373                alignment = Layout.Alignment.ALIGN_CENTER;
6374                break;
6375            case TEXT_ALIGNMENT_VIEW_START:
6376                alignment = (getLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
6377                        Layout.Alignment.ALIGN_RIGHT : Layout.Alignment.ALIGN_LEFT;
6378                break;
6379            case TEXT_ALIGNMENT_VIEW_END:
6380                alignment = (getLayoutDirection() == LAYOUT_DIRECTION_RTL) ?
6381                        Layout.Alignment.ALIGN_LEFT : Layout.Alignment.ALIGN_RIGHT;
6382                break;
6383            case TEXT_ALIGNMENT_INHERIT:
6384                // This should never happen as we have already resolved the text alignment
6385                // but better safe than sorry so we just fall through
6386            default:
6387                alignment = Layout.Alignment.ALIGN_NORMAL;
6388                break;
6389        }
6390        return alignment;
6391    }
6392
6393    /**
6394     * The width passed in is now the desired layout width,
6395     * not the full view width with padding.
6396     * {@hide}
6397     */
6398    protected void makeNewLayout(int wantWidth, int hintWidth,
6399                                 BoringLayout.Metrics boring,
6400                                 BoringLayout.Metrics hintBoring,
6401                                 int ellipsisWidth, boolean bringIntoView) {
6402        stopMarquee();
6403
6404        // Update "old" cached values
6405        mOldMaximum = mMaximum;
6406        mOldMaxMode = mMaxMode;
6407
6408        mHighlightPathBogus = true;
6409
6410        if (wantWidth < 0) {
6411            wantWidth = 0;
6412        }
6413        if (hintWidth < 0) {
6414            hintWidth = 0;
6415        }
6416
6417        Layout.Alignment alignment = getLayoutAlignment();
6418        final boolean testDirChange = mSingleLine && mLayout != null &&
6419            (alignment == Layout.Alignment.ALIGN_NORMAL ||
6420             alignment == Layout.Alignment.ALIGN_OPPOSITE);
6421        int oldDir = 0;
6422        if (testDirChange) oldDir = mLayout.getParagraphDirection(0);
6423        boolean shouldEllipsize = mEllipsize != null && getKeyListener() == null;
6424        final boolean switchEllipsize = mEllipsize == TruncateAt.MARQUEE &&
6425                mMarqueeFadeMode != MARQUEE_FADE_NORMAL;
6426        TruncateAt effectiveEllipsize = mEllipsize;
6427        if (mEllipsize == TruncateAt.MARQUEE &&
6428                mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
6429            effectiveEllipsize = TruncateAt.END_SMALL;
6430        }
6431
6432        if (mTextDir == null) {
6433            mTextDir = getTextDirectionHeuristic();
6434        }
6435
6436        mLayout = makeSingleLayout(wantWidth, boring, ellipsisWidth, alignment, shouldEllipsize,
6437                effectiveEllipsize, effectiveEllipsize == mEllipsize);
6438        if (switchEllipsize) {
6439            TruncateAt oppositeEllipsize = effectiveEllipsize == TruncateAt.MARQUEE ?
6440                    TruncateAt.END : TruncateAt.MARQUEE;
6441            mSavedMarqueeModeLayout = makeSingleLayout(wantWidth, boring, ellipsisWidth, alignment,
6442                    shouldEllipsize, oppositeEllipsize, effectiveEllipsize != mEllipsize);
6443        }
6444
6445        shouldEllipsize = mEllipsize != null;
6446        mHintLayout = null;
6447
6448        if (mHint != null) {
6449            if (shouldEllipsize) hintWidth = wantWidth;
6450
6451            if (hintBoring == UNKNOWN_BORING) {
6452                hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mTextDir,
6453                                                   mHintBoring);
6454                if (hintBoring != null) {
6455                    mHintBoring = hintBoring;
6456                }
6457            }
6458
6459            if (hintBoring != null) {
6460                if (hintBoring.width <= hintWidth &&
6461                    (!shouldEllipsize || hintBoring.width <= ellipsisWidth)) {
6462                    if (mSavedHintLayout != null) {
6463                        mHintLayout = mSavedHintLayout.
6464                                replaceOrMake(mHint, mTextPaint,
6465                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6466                                hintBoring, mIncludePad);
6467                    } else {
6468                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6469                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6470                                hintBoring, mIncludePad);
6471                    }
6472
6473                    mSavedHintLayout = (BoringLayout) mHintLayout;
6474                } else if (shouldEllipsize && hintBoring.width <= hintWidth) {
6475                    if (mSavedHintLayout != null) {
6476                        mHintLayout = mSavedHintLayout.
6477                                replaceOrMake(mHint, mTextPaint,
6478                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6479                                hintBoring, mIncludePad, mEllipsize,
6480                                ellipsisWidth);
6481                    } else {
6482                        mHintLayout = BoringLayout.make(mHint, mTextPaint,
6483                                hintWidth, alignment, mSpacingMult, mSpacingAdd,
6484                                hintBoring, mIncludePad, mEllipsize,
6485                                ellipsisWidth);
6486                    }
6487                } else if (shouldEllipsize) {
6488                    mHintLayout = new StaticLayout(mHint,
6489                                0, mHint.length(),
6490                                mTextPaint, hintWidth, alignment, mTextDir, mSpacingMult,
6491                                mSpacingAdd, mIncludePad, mEllipsize,
6492                                ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6493                } else {
6494                    mHintLayout = new StaticLayout(mHint, mTextPaint,
6495                            hintWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6496                            mIncludePad);
6497                }
6498            } else if (shouldEllipsize) {
6499                mHintLayout = new StaticLayout(mHint,
6500                            0, mHint.length(),
6501                            mTextPaint, hintWidth, alignment, mTextDir, mSpacingMult,
6502                            mSpacingAdd, mIncludePad, mEllipsize,
6503                            ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6504            } else {
6505                mHintLayout = new StaticLayout(mHint, mTextPaint,
6506                        hintWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6507                        mIncludePad);
6508            }
6509        }
6510
6511        if (bringIntoView || (testDirChange && oldDir != mLayout.getParagraphDirection(0))) {
6512            registerForPreDraw();
6513        }
6514
6515        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
6516            if (!compressText(ellipsisWidth)) {
6517                final int height = mLayoutParams.height;
6518                // If the size of the view does not depend on the size of the text, try to
6519                // start the marquee immediately
6520                if (height != LayoutParams.WRAP_CONTENT && height != LayoutParams.MATCH_PARENT) {
6521                    startMarquee();
6522                } else {
6523                    // Defer the start of the marquee until we know our width (see setFrame())
6524                    mRestartMarquee = true;
6525                }
6526            }
6527        }
6528
6529        // CursorControllers need a non-null mLayout
6530        if (mEditor != null) mEditor.prepareCursorControllers();
6531    }
6532
6533    private Layout makeSingleLayout(int wantWidth, BoringLayout.Metrics boring, int ellipsisWidth,
6534            Layout.Alignment alignment, boolean shouldEllipsize, TruncateAt effectiveEllipsize,
6535            boolean useSaved) {
6536        Layout result = null;
6537        if (mText instanceof Spannable) {
6538            result = new DynamicLayout(mText, mTransformed, mTextPaint, wantWidth,
6539                    alignment, mTextDir, mSpacingMult,
6540                    mSpacingAdd, mIncludePad, getKeyListener() == null ? effectiveEllipsize : null,
6541                            ellipsisWidth);
6542        } else {
6543            if (boring == UNKNOWN_BORING) {
6544                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
6545                if (boring != null) {
6546                    mBoring = boring;
6547                }
6548            }
6549
6550            if (boring != null) {
6551                if (boring.width <= wantWidth &&
6552                        (effectiveEllipsize == null || boring.width <= ellipsisWidth)) {
6553                    if (useSaved && mSavedLayout != null) {
6554                        result = mSavedLayout.replaceOrMake(mTransformed, mTextPaint,
6555                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6556                                boring, mIncludePad);
6557                    } else {
6558                        result = BoringLayout.make(mTransformed, mTextPaint,
6559                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6560                                boring, mIncludePad);
6561                    }
6562
6563                    if (useSaved) {
6564                        mSavedLayout = (BoringLayout) result;
6565                    }
6566                } else if (shouldEllipsize && boring.width <= wantWidth) {
6567                    if (useSaved && mSavedLayout != null) {
6568                        result = mSavedLayout.replaceOrMake(mTransformed, mTextPaint,
6569                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6570                                boring, mIncludePad, effectiveEllipsize,
6571                                ellipsisWidth);
6572                    } else {
6573                        result = BoringLayout.make(mTransformed, mTextPaint,
6574                                wantWidth, alignment, mSpacingMult, mSpacingAdd,
6575                                boring, mIncludePad, effectiveEllipsize,
6576                                ellipsisWidth);
6577                    }
6578                } else if (shouldEllipsize) {
6579                    result = new StaticLayout(mTransformed,
6580                            0, mTransformed.length(),
6581                            mTextPaint, wantWidth, alignment, mTextDir, mSpacingMult,
6582                            mSpacingAdd, mIncludePad, effectiveEllipsize,
6583                            ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6584                } else {
6585                    result = new StaticLayout(mTransformed, mTextPaint,
6586                            wantWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6587                            mIncludePad);
6588                }
6589            } else if (shouldEllipsize) {
6590                result = new StaticLayout(mTransformed,
6591                        0, mTransformed.length(),
6592                        mTextPaint, wantWidth, alignment, mTextDir, mSpacingMult,
6593                        mSpacingAdd, mIncludePad, effectiveEllipsize,
6594                        ellipsisWidth, mMaxMode == LINES ? mMaximum : Integer.MAX_VALUE);
6595            } else {
6596                result = new StaticLayout(mTransformed, mTextPaint,
6597                        wantWidth, alignment, mTextDir, mSpacingMult, mSpacingAdd,
6598                        mIncludePad);
6599            }
6600        }
6601        return result;
6602    }
6603
6604    private boolean compressText(float width) {
6605        if (isHardwareAccelerated()) return false;
6606
6607        // Only compress the text if it hasn't been compressed by the previous pass
6608        if (width > 0.0f && mLayout != null && getLineCount() == 1 && !mUserSetTextScaleX &&
6609                mTextPaint.getTextScaleX() == 1.0f) {
6610            final float textWidth = mLayout.getLineWidth(0);
6611            final float overflow = (textWidth + 1.0f - width) / width;
6612            if (overflow > 0.0f && overflow <= Marquee.MARQUEE_DELTA_MAX) {
6613                mTextPaint.setTextScaleX(1.0f - overflow - 0.005f);
6614                post(new Runnable() {
6615                    public void run() {
6616                        requestLayout();
6617                    }
6618                });
6619                return true;
6620            }
6621        }
6622
6623        return false;
6624    }
6625
6626    private static int desired(Layout layout) {
6627        int n = layout.getLineCount();
6628        CharSequence text = layout.getText();
6629        float max = 0;
6630
6631        // if any line was wrapped, we can't use it.
6632        // but it's ok for the last line not to have a newline
6633
6634        for (int i = 0; i < n - 1; i++) {
6635            if (text.charAt(layout.getLineEnd(i) - 1) != '\n')
6636                return -1;
6637        }
6638
6639        for (int i = 0; i < n; i++) {
6640            max = Math.max(max, layout.getLineWidth(i));
6641        }
6642
6643        return (int) Math.ceil(max);
6644    }
6645
6646    /**
6647     * Set whether the TextView includes extra top and bottom padding to make
6648     * room for accents that go above the normal ascent and descent.
6649     * The default is true.
6650     *
6651     * @see #getIncludeFontPadding()
6652     *
6653     * @attr ref android.R.styleable#TextView_includeFontPadding
6654     */
6655    public void setIncludeFontPadding(boolean includepad) {
6656        if (mIncludePad != includepad) {
6657            mIncludePad = includepad;
6658
6659            if (mLayout != null) {
6660                nullLayouts();
6661                requestLayout();
6662                invalidate();
6663            }
6664        }
6665    }
6666
6667    /**
6668     * Gets whether the TextView includes extra top and bottom padding to make
6669     * room for accents that go above the normal ascent and descent.
6670     *
6671     * @see #setIncludeFontPadding(boolean)
6672     *
6673     * @attr ref android.R.styleable#TextView_includeFontPadding
6674     */
6675    public boolean getIncludeFontPadding() {
6676        return mIncludePad;
6677    }
6678
6679    private static final BoringLayout.Metrics UNKNOWN_BORING = new BoringLayout.Metrics();
6680
6681    @Override
6682    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
6683        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
6684        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
6685        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
6686        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
6687
6688        int width;
6689        int height;
6690
6691        BoringLayout.Metrics boring = UNKNOWN_BORING;
6692        BoringLayout.Metrics hintBoring = UNKNOWN_BORING;
6693
6694        if (mTextDir == null) {
6695            mTextDir = getTextDirectionHeuristic();
6696        }
6697
6698        int des = -1;
6699        boolean fromexisting = false;
6700
6701        if (widthMode == MeasureSpec.EXACTLY) {
6702            // Parent has told us how big to be. So be it.
6703            width = widthSize;
6704        } else {
6705            if (mLayout != null && mEllipsize == null) {
6706                des = desired(mLayout);
6707            }
6708
6709            if (des < 0) {
6710                boring = BoringLayout.isBoring(mTransformed, mTextPaint, mTextDir, mBoring);
6711                if (boring != null) {
6712                    mBoring = boring;
6713                }
6714            } else {
6715                fromexisting = true;
6716            }
6717
6718            if (boring == null || boring == UNKNOWN_BORING) {
6719                if (des < 0) {
6720                    des = (int) Math.ceil(Layout.getDesiredWidth(mTransformed, mTextPaint));
6721                }
6722                width = des;
6723            } else {
6724                width = boring.width;
6725            }
6726
6727            final Drawables dr = mDrawables;
6728            if (dr != null) {
6729                width = Math.max(width, dr.mDrawableWidthTop);
6730                width = Math.max(width, dr.mDrawableWidthBottom);
6731            }
6732
6733            if (mHint != null) {
6734                int hintDes = -1;
6735                int hintWidth;
6736
6737                if (mHintLayout != null && mEllipsize == null) {
6738                    hintDes = desired(mHintLayout);
6739                }
6740
6741                if (hintDes < 0) {
6742                    hintBoring = BoringLayout.isBoring(mHint, mTextPaint, mTextDir, mHintBoring);
6743                    if (hintBoring != null) {
6744                        mHintBoring = hintBoring;
6745                    }
6746                }
6747
6748                if (hintBoring == null || hintBoring == UNKNOWN_BORING) {
6749                    if (hintDes < 0) {
6750                        hintDes = (int) Math.ceil(Layout.getDesiredWidth(mHint, mTextPaint));
6751                    }
6752                    hintWidth = hintDes;
6753                } else {
6754                    hintWidth = hintBoring.width;
6755                }
6756
6757                if (hintWidth > width) {
6758                    width = hintWidth;
6759                }
6760            }
6761
6762            width += getCompoundPaddingLeft() + getCompoundPaddingRight();
6763
6764            if (mMaxWidthMode == EMS) {
6765                width = Math.min(width, mMaxWidth * getLineHeight());
6766            } else {
6767                width = Math.min(width, mMaxWidth);
6768            }
6769
6770            if (mMinWidthMode == EMS) {
6771                width = Math.max(width, mMinWidth * getLineHeight());
6772            } else {
6773                width = Math.max(width, mMinWidth);
6774            }
6775
6776            // Check against our minimum width
6777            width = Math.max(width, getSuggestedMinimumWidth());
6778
6779            if (widthMode == MeasureSpec.AT_MOST) {
6780                width = Math.min(widthSize, width);
6781            }
6782        }
6783
6784        int want = width - getCompoundPaddingLeft() - getCompoundPaddingRight();
6785        int unpaddedWidth = want;
6786
6787        if (mHorizontallyScrolling) want = VERY_WIDE;
6788
6789        int hintWant = want;
6790        int hintWidth = (mHintLayout == null) ? hintWant : mHintLayout.getWidth();
6791
6792        if (mLayout == null) {
6793            makeNewLayout(want, hintWant, boring, hintBoring,
6794                          width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6795        } else {
6796            final boolean layoutChanged = (mLayout.getWidth() != want) ||
6797                    (hintWidth != hintWant) ||
6798                    (mLayout.getEllipsizedWidth() !=
6799                            width - getCompoundPaddingLeft() - getCompoundPaddingRight());
6800
6801            final boolean widthChanged = (mHint == null) &&
6802                    (mEllipsize == null) &&
6803                    (want > mLayout.getWidth()) &&
6804                    (mLayout instanceof BoringLayout || (fromexisting && des >= 0 && des <= want));
6805
6806            final boolean maximumChanged = (mMaxMode != mOldMaxMode) || (mMaximum != mOldMaximum);
6807
6808            if (layoutChanged || maximumChanged) {
6809                if (!maximumChanged && widthChanged) {
6810                    mLayout.increaseWidthTo(want);
6811                } else {
6812                    makeNewLayout(want, hintWant, boring, hintBoring,
6813                            width - getCompoundPaddingLeft() - getCompoundPaddingRight(), false);
6814                }
6815            } else {
6816                // Nothing has changed
6817            }
6818        }
6819
6820        if (heightMode == MeasureSpec.EXACTLY) {
6821            // Parent has told us how big to be. So be it.
6822            height = heightSize;
6823            mDesiredHeightAtMeasure = -1;
6824        } else {
6825            int desired = getDesiredHeight();
6826
6827            height = desired;
6828            mDesiredHeightAtMeasure = desired;
6829
6830            if (heightMode == MeasureSpec.AT_MOST) {
6831                height = Math.min(desired, heightSize);
6832            }
6833        }
6834
6835        int unpaddedHeight = height - getCompoundPaddingTop() - getCompoundPaddingBottom();
6836        if (mMaxMode == LINES && mLayout.getLineCount() > mMaximum) {
6837            unpaddedHeight = Math.min(unpaddedHeight, mLayout.getLineTop(mMaximum));
6838        }
6839
6840        /*
6841         * We didn't let makeNewLayout() register to bring the cursor into view,
6842         * so do it here if there is any possibility that it is needed.
6843         */
6844        if (mMovement != null ||
6845            mLayout.getWidth() > unpaddedWidth ||
6846            mLayout.getHeight() > unpaddedHeight) {
6847            registerForPreDraw();
6848        } else {
6849            scrollTo(0, 0);
6850        }
6851
6852        setMeasuredDimension(width, height);
6853    }
6854
6855    private int getDesiredHeight() {
6856        return Math.max(
6857                getDesiredHeight(mLayout, true),
6858                getDesiredHeight(mHintLayout, mEllipsize != null));
6859    }
6860
6861    private int getDesiredHeight(Layout layout, boolean cap) {
6862        if (layout == null) {
6863            return 0;
6864        }
6865
6866        int linecount = layout.getLineCount();
6867        int pad = getCompoundPaddingTop() + getCompoundPaddingBottom();
6868        int desired = layout.getLineTop(linecount);
6869
6870        final Drawables dr = mDrawables;
6871        if (dr != null) {
6872            desired = Math.max(desired, dr.mDrawableHeightLeft);
6873            desired = Math.max(desired, dr.mDrawableHeightRight);
6874        }
6875
6876        desired += pad;
6877
6878        if (mMaxMode == LINES) {
6879            /*
6880             * Don't cap the hint to a certain number of lines.
6881             * (Do cap it, though, if we have a maximum pixel height.)
6882             */
6883            if (cap) {
6884                if (linecount > mMaximum) {
6885                    desired = layout.getLineTop(mMaximum);
6886
6887                    if (dr != null) {
6888                        desired = Math.max(desired, dr.mDrawableHeightLeft);
6889                        desired = Math.max(desired, dr.mDrawableHeightRight);
6890                    }
6891
6892                    desired += pad;
6893                    linecount = mMaximum;
6894                }
6895            }
6896        } else {
6897            desired = Math.min(desired, mMaximum);
6898        }
6899
6900        if (mMinMode == LINES) {
6901            if (linecount < mMinimum) {
6902                desired += getLineHeight() * (mMinimum - linecount);
6903            }
6904        } else {
6905            desired = Math.max(desired, mMinimum);
6906        }
6907
6908        // Check against our minimum height
6909        desired = Math.max(desired, getSuggestedMinimumHeight());
6910
6911        return desired;
6912    }
6913
6914    /**
6915     * Check whether a change to the existing text layout requires a
6916     * new view layout.
6917     */
6918    private void checkForResize() {
6919        boolean sizeChanged = false;
6920
6921        if (mLayout != null) {
6922            // Check if our width changed
6923            if (mLayoutParams.width == LayoutParams.WRAP_CONTENT) {
6924                sizeChanged = true;
6925                invalidate();
6926            }
6927
6928            // Check if our height changed
6929            if (mLayoutParams.height == LayoutParams.WRAP_CONTENT) {
6930                int desiredHeight = getDesiredHeight();
6931
6932                if (desiredHeight != this.getHeight()) {
6933                    sizeChanged = true;
6934                }
6935            } else if (mLayoutParams.height == LayoutParams.MATCH_PARENT) {
6936                if (mDesiredHeightAtMeasure >= 0) {
6937                    int desiredHeight = getDesiredHeight();
6938
6939                    if (desiredHeight != mDesiredHeightAtMeasure) {
6940                        sizeChanged = true;
6941                    }
6942                }
6943            }
6944        }
6945
6946        if (sizeChanged) {
6947            requestLayout();
6948            // caller will have already invalidated
6949        }
6950    }
6951
6952    /**
6953     * Check whether entirely new text requires a new view layout
6954     * or merely a new text layout.
6955     */
6956    private void checkForRelayout() {
6957        // If we have a fixed width, we can just swap in a new text layout
6958        // if the text height stays the same or if the view height is fixed.
6959
6960        if ((mLayoutParams.width != LayoutParams.WRAP_CONTENT ||
6961                (mMaxWidthMode == mMinWidthMode && mMaxWidth == mMinWidth)) &&
6962                (mHint == null || mHintLayout != null) &&
6963                (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight() > 0)) {
6964            // Static width, so try making a new text layout.
6965
6966            int oldht = mLayout.getHeight();
6967            int want = mLayout.getWidth();
6968            int hintWant = mHintLayout == null ? 0 : mHintLayout.getWidth();
6969
6970            /*
6971             * No need to bring the text into view, since the size is not
6972             * changing (unless we do the requestLayout(), in which case it
6973             * will happen at measure).
6974             */
6975            makeNewLayout(want, hintWant, UNKNOWN_BORING, UNKNOWN_BORING,
6976                          mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight(),
6977                          false);
6978
6979            if (mEllipsize != TextUtils.TruncateAt.MARQUEE) {
6980                // In a fixed-height view, so use our new text layout.
6981                if (mLayoutParams.height != LayoutParams.WRAP_CONTENT &&
6982                    mLayoutParams.height != LayoutParams.MATCH_PARENT) {
6983                    invalidate();
6984                    return;
6985                }
6986
6987                // Dynamic height, but height has stayed the same,
6988                // so use our new text layout.
6989                if (mLayout.getHeight() == oldht &&
6990                    (mHintLayout == null || mHintLayout.getHeight() == oldht)) {
6991                    invalidate();
6992                    return;
6993                }
6994            }
6995
6996            // We lose: the height has changed and we have a dynamic height.
6997            // Request a new view layout using our new text layout.
6998            requestLayout();
6999            invalidate();
7000        } else {
7001            // Dynamic width, so we have no choice but to request a new
7002            // view layout with a new text layout.
7003            nullLayouts();
7004            requestLayout();
7005            invalidate();
7006        }
7007    }
7008
7009    @Override
7010    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
7011        super.onLayout(changed, left, top, right, bottom);
7012        if (mDeferScroll >= 0) {
7013            int curs = mDeferScroll;
7014            mDeferScroll = -1;
7015            bringPointIntoView(Math.min(curs, mText.length()));
7016        }
7017    }
7018
7019    private boolean isShowingHint() {
7020        return TextUtils.isEmpty(mText) && !TextUtils.isEmpty(mHint);
7021    }
7022
7023    /**
7024     * Returns true if anything changed.
7025     */
7026    private boolean bringTextIntoView() {
7027        Layout layout = isShowingHint() ? mHintLayout : mLayout;
7028        int line = 0;
7029        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
7030            line = layout.getLineCount() - 1;
7031        }
7032
7033        Layout.Alignment a = layout.getParagraphAlignment(line);
7034        int dir = layout.getParagraphDirection(line);
7035        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
7036        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
7037        int ht = layout.getHeight();
7038
7039        int scrollx, scrolly;
7040
7041        // Convert to left, center, or right alignment.
7042        if (a == Layout.Alignment.ALIGN_NORMAL) {
7043            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_LEFT :
7044                Layout.Alignment.ALIGN_RIGHT;
7045        } else if (a == Layout.Alignment.ALIGN_OPPOSITE){
7046            a = dir == Layout.DIR_LEFT_TO_RIGHT ? Layout.Alignment.ALIGN_RIGHT :
7047                Layout.Alignment.ALIGN_LEFT;
7048        }
7049
7050        if (a == Layout.Alignment.ALIGN_CENTER) {
7051            /*
7052             * Keep centered if possible, or, if it is too wide to fit,
7053             * keep leading edge in view.
7054             */
7055
7056            int left = (int) Math.floor(layout.getLineLeft(line));
7057            int right = (int) Math.ceil(layout.getLineRight(line));
7058
7059            if (right - left < hspace) {
7060                scrollx = (right + left) / 2 - hspace / 2;
7061            } else {
7062                if (dir < 0) {
7063                    scrollx = right - hspace;
7064                } else {
7065                    scrollx = left;
7066                }
7067            }
7068        } else if (a == Layout.Alignment.ALIGN_RIGHT) {
7069            int right = (int) Math.ceil(layout.getLineRight(line));
7070            scrollx = right - hspace;
7071        } else { // a == Layout.Alignment.ALIGN_LEFT (will also be the default)
7072            scrollx = (int) Math.floor(layout.getLineLeft(line));
7073        }
7074
7075        if (ht < vspace) {
7076            scrolly = 0;
7077        } else {
7078            if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
7079                scrolly = ht - vspace;
7080            } else {
7081                scrolly = 0;
7082            }
7083        }
7084
7085        if (scrollx != mScrollX || scrolly != mScrollY) {
7086            scrollTo(scrollx, scrolly);
7087            return true;
7088        } else {
7089            return false;
7090        }
7091    }
7092
7093    /**
7094     * Move the point, specified by the offset, into the view if it is needed.
7095     * This has to be called after layout. Returns true if anything changed.
7096     */
7097    public boolean bringPointIntoView(int offset) {
7098        if (isLayoutRequested()) {
7099            mDeferScroll = offset;
7100            return false;
7101        }
7102        boolean changed = false;
7103
7104        Layout layout = isShowingHint() ? mHintLayout: mLayout;
7105
7106        if (layout == null) return changed;
7107
7108        int line = layout.getLineForOffset(offset);
7109
7110        int grav;
7111
7112        switch (layout.getParagraphAlignment(line)) {
7113            case ALIGN_LEFT:
7114                grav = 1;
7115                break;
7116            case ALIGN_RIGHT:
7117                grav = -1;
7118                break;
7119            case ALIGN_NORMAL:
7120                grav = layout.getParagraphDirection(line);
7121                break;
7122            case ALIGN_OPPOSITE:
7123                grav = -layout.getParagraphDirection(line);
7124                break;
7125            case ALIGN_CENTER:
7126            default:
7127                grav = 0;
7128                break;
7129        }
7130
7131        // We only want to clamp the cursor to fit within the layout width
7132        // in left-to-right modes, because in a right to left alignment,
7133        // we want to scroll to keep the line-right on the screen, as other
7134        // lines are likely to have text flush with the right margin, which
7135        // we want to keep visible.
7136        // A better long-term solution would probably be to measure both
7137        // the full line and a blank-trimmed version, and, for example, use
7138        // the latter measurement for centering and right alignment, but for
7139        // the time being we only implement the cursor clamping in left to
7140        // right where it is most likely to be annoying.
7141        final boolean clamped = grav > 0;
7142        // FIXME: Is it okay to truncate this, or should we round?
7143        final int x = (int)layout.getPrimaryHorizontal(offset, clamped);
7144        final int top = layout.getLineTop(line);
7145        final int bottom = layout.getLineTop(line + 1);
7146
7147        int left = (int) Math.floor(layout.getLineLeft(line));
7148        int right = (int) Math.ceil(layout.getLineRight(line));
7149        int ht = layout.getHeight();
7150
7151        int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
7152        int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
7153        if (!mHorizontallyScrolling && right - left > hspace && right > x) {
7154            // If cursor has been clamped, make sure we don't scroll.
7155            right = Math.max(x, left + hspace);
7156        }
7157
7158        int hslack = (bottom - top) / 2;
7159        int vslack = hslack;
7160
7161        if (vslack > vspace / 4)
7162            vslack = vspace / 4;
7163        if (hslack > hspace / 4)
7164            hslack = hspace / 4;
7165
7166        int hs = mScrollX;
7167        int vs = mScrollY;
7168
7169        if (top - vs < vslack)
7170            vs = top - vslack;
7171        if (bottom - vs > vspace - vslack)
7172            vs = bottom - (vspace - vslack);
7173        if (ht - vs < vspace)
7174            vs = ht - vspace;
7175        if (0 - vs > 0)
7176            vs = 0;
7177
7178        if (grav != 0) {
7179            if (x - hs < hslack) {
7180                hs = x - hslack;
7181            }
7182            if (x - hs > hspace - hslack) {
7183                hs = x - (hspace - hslack);
7184            }
7185        }
7186
7187        if (grav < 0) {
7188            if (left - hs > 0)
7189                hs = left;
7190            if (right - hs < hspace)
7191                hs = right - hspace;
7192        } else if (grav > 0) {
7193            if (right - hs < hspace)
7194                hs = right - hspace;
7195            if (left - hs > 0)
7196                hs = left;
7197        } else /* grav == 0 */ {
7198            if (right - left <= hspace) {
7199                /*
7200                 * If the entire text fits, center it exactly.
7201                 */
7202                hs = left - (hspace - (right - left)) / 2;
7203            } else if (x > right - hslack) {
7204                /*
7205                 * If we are near the right edge, keep the right edge
7206                 * at the edge of the view.
7207                 */
7208                hs = right - hspace;
7209            } else if (x < left + hslack) {
7210                /*
7211                 * If we are near the left edge, keep the left edge
7212                 * at the edge of the view.
7213                 */
7214                hs = left;
7215            } else if (left > hs) {
7216                /*
7217                 * Is there whitespace visible at the left?  Fix it if so.
7218                 */
7219                hs = left;
7220            } else if (right < hs + hspace) {
7221                /*
7222                 * Is there whitespace visible at the right?  Fix it if so.
7223                 */
7224                hs = right - hspace;
7225            } else {
7226                /*
7227                 * Otherwise, float as needed.
7228                 */
7229                if (x - hs < hslack) {
7230                    hs = x - hslack;
7231                }
7232                if (x - hs > hspace - hslack) {
7233                    hs = x - (hspace - hslack);
7234                }
7235            }
7236        }
7237
7238        if (hs != mScrollX || vs != mScrollY) {
7239            if (mScroller == null) {
7240                scrollTo(hs, vs);
7241            } else {
7242                long duration = AnimationUtils.currentAnimationTimeMillis() - mLastScroll;
7243                int dx = hs - mScrollX;
7244                int dy = vs - mScrollY;
7245
7246                if (duration > ANIMATED_SCROLL_GAP) {
7247                    mScroller.startScroll(mScrollX, mScrollY, dx, dy);
7248                    awakenScrollBars(mScroller.getDuration());
7249                    invalidate();
7250                } else {
7251                    if (!mScroller.isFinished()) {
7252                        mScroller.abortAnimation();
7253                    }
7254
7255                    scrollBy(dx, dy);
7256                }
7257
7258                mLastScroll = AnimationUtils.currentAnimationTimeMillis();
7259            }
7260
7261            changed = true;
7262        }
7263
7264        if (isFocused()) {
7265            // This offsets because getInterestingRect() is in terms of viewport coordinates, but
7266            // requestRectangleOnScreen() is in terms of content coordinates.
7267
7268            // The offsets here are to ensure the rectangle we are using is
7269            // within our view bounds, in case the cursor is on the far left
7270            // or right.  If it isn't withing the bounds, then this request
7271            // will be ignored.
7272            if (mTempRect == null) mTempRect = new Rect();
7273            mTempRect.set(x - 2, top, x + 2, bottom);
7274            getInterestingRect(mTempRect, line);
7275            mTempRect.offset(mScrollX, mScrollY);
7276
7277            if (requestRectangleOnScreen(mTempRect)) {
7278                changed = true;
7279            }
7280        }
7281
7282        return changed;
7283    }
7284
7285    /**
7286     * Move the cursor, if needed, so that it is at an offset that is visible
7287     * to the user.  This will not move the cursor if it represents more than
7288     * one character (a selection range).  This will only work if the
7289     * TextView contains spannable text; otherwise it will do nothing.
7290     *
7291     * @return True if the cursor was actually moved, false otherwise.
7292     */
7293    public boolean moveCursorToVisibleOffset() {
7294        if (!(mText instanceof Spannable)) {
7295            return false;
7296        }
7297        int start = getSelectionStart();
7298        int end = getSelectionEnd();
7299        if (start != end) {
7300            return false;
7301        }
7302
7303        // First: make sure the line is visible on screen:
7304
7305        int line = mLayout.getLineForOffset(start);
7306
7307        final int top = mLayout.getLineTop(line);
7308        final int bottom = mLayout.getLineTop(line + 1);
7309        final int vspace = mBottom - mTop - getExtendedPaddingTop() - getExtendedPaddingBottom();
7310        int vslack = (bottom - top) / 2;
7311        if (vslack > vspace / 4)
7312            vslack = vspace / 4;
7313        final int vs = mScrollY;
7314
7315        if (top < (vs+vslack)) {
7316            line = mLayout.getLineForVertical(vs+vslack+(bottom-top));
7317        } else if (bottom > (vspace+vs-vslack)) {
7318            line = mLayout.getLineForVertical(vspace+vs-vslack-(bottom-top));
7319        }
7320
7321        // Next: make sure the character is visible on screen:
7322
7323        final int hspace = mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight();
7324        final int hs = mScrollX;
7325        final int leftChar = mLayout.getOffsetForHorizontal(line, hs);
7326        final int rightChar = mLayout.getOffsetForHorizontal(line, hspace+hs);
7327
7328        // line might contain bidirectional text
7329        final int lowChar = leftChar < rightChar ? leftChar : rightChar;
7330        final int highChar = leftChar > rightChar ? leftChar : rightChar;
7331
7332        int newStart = start;
7333        if (newStart < lowChar) {
7334            newStart = lowChar;
7335        } else if (newStart > highChar) {
7336            newStart = highChar;
7337        }
7338
7339        if (newStart != start) {
7340            Selection.setSelection((Spannable)mText, newStart);
7341            return true;
7342        }
7343
7344        return false;
7345    }
7346
7347    @Override
7348    public void computeScroll() {
7349        if (mScroller != null) {
7350            if (mScroller.computeScrollOffset()) {
7351                mScrollX = mScroller.getCurrX();
7352                mScrollY = mScroller.getCurrY();
7353                invalidateParentCaches();
7354                postInvalidate();  // So we draw again
7355            }
7356        }
7357    }
7358
7359    private void getInterestingRect(Rect r, int line) {
7360        convertFromViewportToContentCoordinates(r);
7361
7362        // Rectangle can can be expanded on first and last line to take
7363        // padding into account.
7364        // TODO Take left/right padding into account too?
7365        if (line == 0) r.top -= getExtendedPaddingTop();
7366        if (line == mLayout.getLineCount() - 1) r.bottom += getExtendedPaddingBottom();
7367    }
7368
7369    private void convertFromViewportToContentCoordinates(Rect r) {
7370        final int horizontalOffset = viewportToContentHorizontalOffset();
7371        r.left += horizontalOffset;
7372        r.right += horizontalOffset;
7373
7374        final int verticalOffset = viewportToContentVerticalOffset();
7375        r.top += verticalOffset;
7376        r.bottom += verticalOffset;
7377    }
7378
7379    int viewportToContentHorizontalOffset() {
7380        return getCompoundPaddingLeft() - mScrollX;
7381    }
7382
7383    int viewportToContentVerticalOffset() {
7384        int offset = getExtendedPaddingTop() - mScrollY;
7385        if ((mGravity & Gravity.VERTICAL_GRAVITY_MASK) != Gravity.TOP) {
7386            offset += getVerticalOffset(false);
7387        }
7388        return offset;
7389    }
7390
7391    @Override
7392    public void debug(int depth) {
7393        super.debug(depth);
7394
7395        String output = debugIndent(depth);
7396        output += "frame={" + mLeft + ", " + mTop + ", " + mRight
7397                + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY
7398                + "} ";
7399
7400        if (mText != null) {
7401
7402            output += "mText=\"" + mText + "\" ";
7403            if (mLayout != null) {
7404                output += "mLayout width=" + mLayout.getWidth()
7405                        + " height=" + mLayout.getHeight();
7406            }
7407        } else {
7408            output += "mText=NULL";
7409        }
7410        Log.d(VIEW_LOG_TAG, output);
7411    }
7412
7413    /**
7414     * Convenience for {@link Selection#getSelectionStart}.
7415     */
7416    @ViewDebug.ExportedProperty(category = "text")
7417    public int getSelectionStart() {
7418        return Selection.getSelectionStart(getText());
7419    }
7420
7421    /**
7422     * Convenience for {@link Selection#getSelectionEnd}.
7423     */
7424    @ViewDebug.ExportedProperty(category = "text")
7425    public int getSelectionEnd() {
7426        return Selection.getSelectionEnd(getText());
7427    }
7428
7429    /**
7430     * Return true iff there is a selection inside this text view.
7431     */
7432    public boolean hasSelection() {
7433        final int selectionStart = getSelectionStart();
7434        final int selectionEnd = getSelectionEnd();
7435
7436        return selectionStart >= 0 && selectionStart != selectionEnd;
7437    }
7438
7439    /**
7440     * Sets the properties of this field (lines, horizontally scrolling,
7441     * transformation method) to be for a single-line input.
7442     *
7443     * @attr ref android.R.styleable#TextView_singleLine
7444     */
7445    public void setSingleLine() {
7446        setSingleLine(true);
7447    }
7448
7449    /**
7450     * Sets the properties of this field to transform input to ALL CAPS
7451     * display. This may use a "small caps" formatting if available.
7452     * This setting will be ignored if this field is editable or selectable.
7453     *
7454     * This call replaces the current transformation method. Disabling this
7455     * will not necessarily restore the previous behavior from before this
7456     * was enabled.
7457     *
7458     * @see #setTransformationMethod(TransformationMethod)
7459     * @attr ref android.R.styleable#TextView_textAllCaps
7460     */
7461    public void setAllCaps(boolean allCaps) {
7462        if (allCaps) {
7463            setTransformationMethod(new AllCapsTransformationMethod(getContext()));
7464        } else {
7465            setTransformationMethod(null);
7466        }
7467    }
7468
7469    /**
7470     * If true, sets the properties of this field (number of lines, horizontally scrolling,
7471     * transformation method) to be for a single-line input; if false, restores these to the default
7472     * conditions.
7473     *
7474     * Note that the default conditions are not necessarily those that were in effect prior this
7475     * method, and you may want to reset these properties to your custom values.
7476     *
7477     * @attr ref android.R.styleable#TextView_singleLine
7478     */
7479    @android.view.RemotableViewMethod
7480    public void setSingleLine(boolean singleLine) {
7481        // Could be used, but may break backward compatibility.
7482        // if (mSingleLine == singleLine) return;
7483        setInputTypeSingleLine(singleLine);
7484        applySingleLine(singleLine, true, true);
7485    }
7486
7487    /**
7488     * Adds or remove the EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE on the mInputType.
7489     * @param singleLine
7490     */
7491    private void setInputTypeSingleLine(boolean singleLine) {
7492        if (mEditor != null &&
7493                (mEditor.mInputType & EditorInfo.TYPE_MASK_CLASS) == EditorInfo.TYPE_CLASS_TEXT) {
7494            if (singleLine) {
7495                mEditor.mInputType &= ~EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
7496            } else {
7497                mEditor.mInputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE;
7498            }
7499        }
7500    }
7501
7502    private void applySingleLine(boolean singleLine, boolean applyTransformation,
7503            boolean changeMaxLines) {
7504        mSingleLine = singleLine;
7505        if (singleLine) {
7506            setLines(1);
7507            setHorizontallyScrolling(true);
7508            if (applyTransformation) {
7509                setTransformationMethod(SingleLineTransformationMethod.getInstance());
7510            }
7511        } else {
7512            if (changeMaxLines) {
7513                setMaxLines(Integer.MAX_VALUE);
7514            }
7515            setHorizontallyScrolling(false);
7516            if (applyTransformation) {
7517                setTransformationMethod(null);
7518            }
7519        }
7520    }
7521
7522    /**
7523     * Causes words in the text that are longer than the view is wide
7524     * to be ellipsized instead of broken in the middle.  You may also
7525     * want to {@link #setSingleLine} or {@link #setHorizontallyScrolling}
7526     * to constrain the text to a single line.  Use <code>null</code>
7527     * to turn off ellipsizing.
7528     *
7529     * If {@link #setMaxLines} has been used to set two or more lines,
7530     * only {@link android.text.TextUtils.TruncateAt#END} and
7531     * {@link android.text.TextUtils.TruncateAt#MARQUEE} are supported
7532     * (other ellipsizing types will not do anything).
7533     *
7534     * @attr ref android.R.styleable#TextView_ellipsize
7535     */
7536    public void setEllipsize(TextUtils.TruncateAt where) {
7537        // TruncateAt is an enum. != comparison is ok between these singleton objects.
7538        if (mEllipsize != where) {
7539            mEllipsize = where;
7540
7541            if (mLayout != null) {
7542                nullLayouts();
7543                requestLayout();
7544                invalidate();
7545            }
7546        }
7547    }
7548
7549    /**
7550     * Sets how many times to repeat the marquee animation. Only applied if the
7551     * TextView has marquee enabled. Set to -1 to repeat indefinitely.
7552     *
7553     * @see #getMarqueeRepeatLimit()
7554     *
7555     * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
7556     */
7557    public void setMarqueeRepeatLimit(int marqueeLimit) {
7558        mMarqueeRepeatLimit = marqueeLimit;
7559    }
7560
7561    /**
7562     * Gets the number of times the marquee animation is repeated. Only meaningful if the
7563     * TextView has marquee enabled.
7564     *
7565     * @return the number of times the marquee animation is repeated. -1 if the animation
7566     * repeats indefinitely
7567     *
7568     * @see #setMarqueeRepeatLimit(int)
7569     *
7570     * @attr ref android.R.styleable#TextView_marqueeRepeatLimit
7571     */
7572    public int getMarqueeRepeatLimit() {
7573        return mMarqueeRepeatLimit;
7574    }
7575
7576    /**
7577     * Returns where, if anywhere, words that are longer than the view
7578     * is wide should be ellipsized.
7579     */
7580    @ViewDebug.ExportedProperty
7581    public TextUtils.TruncateAt getEllipsize() {
7582        return mEllipsize;
7583    }
7584
7585    /**
7586     * Set the TextView so that when it takes focus, all the text is
7587     * selected.
7588     *
7589     * @attr ref android.R.styleable#TextView_selectAllOnFocus
7590     */
7591    @android.view.RemotableViewMethod
7592    public void setSelectAllOnFocus(boolean selectAllOnFocus) {
7593        createEditorIfNeeded();
7594        mEditor.mSelectAllOnFocus = selectAllOnFocus;
7595
7596        if (selectAllOnFocus && !(mText instanceof Spannable)) {
7597            setText(mText, BufferType.SPANNABLE);
7598        }
7599    }
7600
7601    /**
7602     * Set whether the cursor is visible. The default is true. Note that this property only
7603     * makes sense for editable TextView.
7604     *
7605     * @see #isCursorVisible()
7606     *
7607     * @attr ref android.R.styleable#TextView_cursorVisible
7608     */
7609    @android.view.RemotableViewMethod
7610    public void setCursorVisible(boolean visible) {
7611        if (visible && mEditor == null) return; // visible is the default value with no edit data
7612        createEditorIfNeeded();
7613        if (mEditor.mCursorVisible != visible) {
7614            mEditor.mCursorVisible = visible;
7615            invalidate();
7616
7617            mEditor.makeBlink();
7618
7619            // InsertionPointCursorController depends on mCursorVisible
7620            mEditor.prepareCursorControllers();
7621        }
7622    }
7623
7624    /**
7625     * @return whether or not the cursor is visible (assuming this TextView is editable)
7626     *
7627     * @see #setCursorVisible(boolean)
7628     *
7629     * @attr ref android.R.styleable#TextView_cursorVisible
7630     */
7631    public boolean isCursorVisible() {
7632        // true is the default value
7633        return mEditor == null ? true : mEditor.mCursorVisible;
7634    }
7635
7636    private boolean canMarquee() {
7637        int width = (mRight - mLeft - getCompoundPaddingLeft() - getCompoundPaddingRight());
7638        return width > 0 && (mLayout.getLineWidth(0) > width ||
7639                (mMarqueeFadeMode != MARQUEE_FADE_NORMAL && mSavedMarqueeModeLayout != null &&
7640                        mSavedMarqueeModeLayout.getLineWidth(0) > width));
7641    }
7642
7643    private void startMarquee() {
7644        // Do not ellipsize EditText
7645        if (getKeyListener() != null) return;
7646
7647        if (compressText(getWidth() - getCompoundPaddingLeft() - getCompoundPaddingRight())) {
7648            return;
7649        }
7650
7651        if ((mMarquee == null || mMarquee.isStopped()) && (isFocused() || isSelected()) &&
7652                getLineCount() == 1 && canMarquee()) {
7653
7654            if (mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
7655                mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_FADE;
7656                final Layout tmp = mLayout;
7657                mLayout = mSavedMarqueeModeLayout;
7658                mSavedMarqueeModeLayout = tmp;
7659                setHorizontalFadingEdgeEnabled(true);
7660                requestLayout();
7661                invalidate();
7662            }
7663
7664            if (mMarquee == null) mMarquee = new Marquee(this);
7665            mMarquee.start(mMarqueeRepeatLimit);
7666        }
7667    }
7668
7669    private void stopMarquee() {
7670        if (mMarquee != null && !mMarquee.isStopped()) {
7671            mMarquee.stop();
7672        }
7673
7674        if (mMarqueeFadeMode == MARQUEE_FADE_SWITCH_SHOW_FADE) {
7675            mMarqueeFadeMode = MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS;
7676            final Layout tmp = mSavedMarqueeModeLayout;
7677            mSavedMarqueeModeLayout = mLayout;
7678            mLayout = tmp;
7679            setHorizontalFadingEdgeEnabled(false);
7680            requestLayout();
7681            invalidate();
7682        }
7683    }
7684
7685    private void startStopMarquee(boolean start) {
7686        if (mEllipsize == TextUtils.TruncateAt.MARQUEE) {
7687            if (start) {
7688                startMarquee();
7689            } else {
7690                stopMarquee();
7691            }
7692        }
7693    }
7694
7695    /**
7696     * This method is called when the text is changed, in case any subclasses
7697     * would like to know.
7698     *
7699     * Within <code>text</code>, the <code>lengthAfter</code> characters
7700     * beginning at <code>start</code> have just replaced old text that had
7701     * length <code>lengthBefore</code>. It is an error to attempt to make
7702     * changes to <code>text</code> from this callback.
7703     *
7704     * @param text The text the TextView is displaying
7705     * @param start The offset of the start of the range of the text that was
7706     * modified
7707     * @param lengthBefore The length of the former text that has been replaced
7708     * @param lengthAfter The length of the replacement modified text
7709     */
7710    protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
7711        // intentionally empty, template pattern method can be overridden by subclasses
7712    }
7713
7714    /**
7715     * This method is called when the selection has changed, in case any
7716     * subclasses would like to know.
7717     *
7718     * @param selStart The new selection start location.
7719     * @param selEnd The new selection end location.
7720     */
7721    protected void onSelectionChanged(int selStart, int selEnd) {
7722        sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED);
7723    }
7724
7725    /**
7726     * Adds a TextWatcher to the list of those whose methods are called
7727     * whenever this TextView's text changes.
7728     * <p>
7729     * In 1.0, the {@link TextWatcher#afterTextChanged} method was erroneously
7730     * not called after {@link #setText} calls.  Now, doing {@link #setText}
7731     * if there are any text changed listeners forces the buffer type to
7732     * Editable if it would not otherwise be and does call this method.
7733     */
7734    public void addTextChangedListener(TextWatcher watcher) {
7735        if (mListeners == null) {
7736            mListeners = new ArrayList<TextWatcher>();
7737        }
7738
7739        mListeners.add(watcher);
7740    }
7741
7742    /**
7743     * Removes the specified TextWatcher from the list of those whose
7744     * methods are called
7745     * whenever this TextView's text changes.
7746     */
7747    public void removeTextChangedListener(TextWatcher watcher) {
7748        if (mListeners != null) {
7749            int i = mListeners.indexOf(watcher);
7750
7751            if (i >= 0) {
7752                mListeners.remove(i);
7753            }
7754        }
7755    }
7756
7757    private void sendBeforeTextChanged(CharSequence text, int start, int before, int after) {
7758        if (mListeners != null) {
7759            final ArrayList<TextWatcher> list = mListeners;
7760            final int count = list.size();
7761            for (int i = 0; i < count; i++) {
7762                list.get(i).beforeTextChanged(text, start, before, after);
7763            }
7764        }
7765
7766        // The spans that are inside or intersect the modified region no longer make sense
7767        removeIntersectingNonAdjacentSpans(start, start + before, SpellCheckSpan.class);
7768        removeIntersectingNonAdjacentSpans(start, start + before, SuggestionSpan.class);
7769    }
7770
7771    // Removes all spans that are inside or actually overlap the start..end range
7772    private <T> void removeIntersectingNonAdjacentSpans(int start, int end, Class<T> type) {
7773        if (!(mText instanceof Editable)) return;
7774        Editable text = (Editable) mText;
7775
7776        T[] spans = text.getSpans(start, end, type);
7777        final int length = spans.length;
7778        for (int i = 0; i < length; i++) {
7779            final int spanStart = text.getSpanStart(spans[i]);
7780            final int spanEnd = text.getSpanEnd(spans[i]);
7781            if (spanEnd == start || spanStart == end) break;
7782            text.removeSpan(spans[i]);
7783        }
7784    }
7785
7786    void removeAdjacentSuggestionSpans(final int pos) {
7787        if (!(mText instanceof Editable)) return;
7788        final Editable text = (Editable) mText;
7789
7790        final SuggestionSpan[] spans = text.getSpans(pos, pos, SuggestionSpan.class);
7791        final int length = spans.length;
7792        for (int i = 0; i < length; i++) {
7793            final int spanStart = text.getSpanStart(spans[i]);
7794            final int spanEnd = text.getSpanEnd(spans[i]);
7795            if (spanEnd == pos || spanStart == pos) {
7796                if (SpellChecker.haveWordBoundariesChanged(text, pos, pos, spanStart, spanEnd)) {
7797                    text.removeSpan(spans[i]);
7798                }
7799            }
7800        }
7801    }
7802
7803    /**
7804     * Not private so it can be called from an inner class without going
7805     * through a thunk.
7806     */
7807    void sendOnTextChanged(CharSequence text, int start, int before, int after) {
7808        if (mListeners != null) {
7809            final ArrayList<TextWatcher> list = mListeners;
7810            final int count = list.size();
7811            for (int i = 0; i < count; i++) {
7812                list.get(i).onTextChanged(text, start, before, after);
7813            }
7814        }
7815
7816        if (mEditor != null) mEditor.sendOnTextChanged(start, after);
7817    }
7818
7819    /**
7820     * Not private so it can be called from an inner class without going
7821     * through a thunk.
7822     */
7823    void sendAfterTextChanged(Editable text) {
7824        if (mListeners != null) {
7825            final ArrayList<TextWatcher> list = mListeners;
7826            final int count = list.size();
7827            for (int i = 0; i < count; i++) {
7828                list.get(i).afterTextChanged(text);
7829            }
7830        }
7831        hideErrorIfUnchanged();
7832    }
7833
7834    void updateAfterEdit() {
7835        invalidate();
7836        int curs = getSelectionStart();
7837
7838        if (curs >= 0 || (mGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) {
7839            registerForPreDraw();
7840        }
7841
7842        checkForResize();
7843
7844        if (curs >= 0) {
7845            mHighlightPathBogus = true;
7846            if (mEditor != null) mEditor.makeBlink();
7847            bringPointIntoView(curs);
7848        }
7849    }
7850
7851    /**
7852     * Not private so it can be called from an inner class without going
7853     * through a thunk.
7854     */
7855    void handleTextChanged(CharSequence buffer, int start, int before, int after) {
7856        final Editor.InputMethodState ims = mEditor == null ? null : mEditor.mInputMethodState;
7857        if (ims == null || ims.mBatchEditNesting == 0) {
7858            updateAfterEdit();
7859        }
7860        if (ims != null) {
7861            ims.mContentChanged = true;
7862            if (ims.mChangedStart < 0) {
7863                ims.mChangedStart = start;
7864                ims.mChangedEnd = start+before;
7865            } else {
7866                ims.mChangedStart = Math.min(ims.mChangedStart, start);
7867                ims.mChangedEnd = Math.max(ims.mChangedEnd, start + before - ims.mChangedDelta);
7868            }
7869            ims.mChangedDelta += after-before;
7870        }
7871        resetErrorChangedFlag();
7872        sendOnTextChanged(buffer, start, before, after);
7873        onTextChanged(buffer, start, before, after);
7874    }
7875
7876    /**
7877     * Not private so it can be called from an inner class without going
7878     * through a thunk.
7879     */
7880    void spanChange(Spanned buf, Object what, int oldStart, int newStart, int oldEnd, int newEnd) {
7881        // XXX Make the start and end move together if this ends up
7882        // spending too much time invalidating.
7883
7884        boolean selChanged = false;
7885        int newSelStart=-1, newSelEnd=-1;
7886
7887        final Editor.InputMethodState ims = mEditor == null ? null : mEditor.mInputMethodState;
7888
7889        if (what == Selection.SELECTION_END) {
7890            selChanged = true;
7891            newSelEnd = newStart;
7892
7893            if (oldStart >= 0 || newStart >= 0) {
7894                invalidateCursor(Selection.getSelectionStart(buf), oldStart, newStart);
7895                checkForResize();
7896                registerForPreDraw();
7897                if (mEditor != null) mEditor.makeBlink();
7898            }
7899        }
7900
7901        if (what == Selection.SELECTION_START) {
7902            selChanged = true;
7903            newSelStart = newStart;
7904
7905            if (oldStart >= 0 || newStart >= 0) {
7906                int end = Selection.getSelectionEnd(buf);
7907                invalidateCursor(end, oldStart, newStart);
7908            }
7909        }
7910
7911        if (selChanged) {
7912            mHighlightPathBogus = true;
7913            if (mEditor != null && !isFocused()) mEditor.mSelectionMoved = true;
7914
7915            if ((buf.getSpanFlags(what)&Spanned.SPAN_INTERMEDIATE) == 0) {
7916                if (newSelStart < 0) {
7917                    newSelStart = Selection.getSelectionStart(buf);
7918                }
7919                if (newSelEnd < 0) {
7920                    newSelEnd = Selection.getSelectionEnd(buf);
7921                }
7922                onSelectionChanged(newSelStart, newSelEnd);
7923            }
7924        }
7925
7926        if (what instanceof UpdateAppearance || what instanceof ParagraphStyle ||
7927                what instanceof CharacterStyle) {
7928            if (ims == null || ims.mBatchEditNesting == 0) {
7929                invalidate();
7930                mHighlightPathBogus = true;
7931                checkForResize();
7932            } else {
7933                ims.mContentChanged = true;
7934            }
7935            if (mEditor != null) {
7936                if (oldStart >= 0) mEditor.invalidateTextDisplayList(mLayout, oldStart, oldEnd);
7937                if (newStart >= 0) mEditor.invalidateTextDisplayList(mLayout, newStart, newEnd);
7938            }
7939        }
7940
7941        if (MetaKeyKeyListener.isMetaTracker(buf, what)) {
7942            mHighlightPathBogus = true;
7943            if (ims != null && MetaKeyKeyListener.isSelectingMetaTracker(buf, what)) {
7944                ims.mSelectionModeChanged = true;
7945            }
7946
7947            if (Selection.getSelectionStart(buf) >= 0) {
7948                if (ims == null || ims.mBatchEditNesting == 0) {
7949                    invalidateCursor();
7950                } else {
7951                    ims.mCursorChanged = true;
7952                }
7953            }
7954        }
7955
7956        if (what instanceof ParcelableSpan) {
7957            // If this is a span that can be sent to a remote process,
7958            // the current extract editor would be interested in it.
7959            if (ims != null && ims.mExtractedTextRequest != null) {
7960                if (ims.mBatchEditNesting != 0) {
7961                    if (oldStart >= 0) {
7962                        if (ims.mChangedStart > oldStart) {
7963                            ims.mChangedStart = oldStart;
7964                        }
7965                        if (ims.mChangedStart > oldEnd) {
7966                            ims.mChangedStart = oldEnd;
7967                        }
7968                    }
7969                    if (newStart >= 0) {
7970                        if (ims.mChangedStart > newStart) {
7971                            ims.mChangedStart = newStart;
7972                        }
7973                        if (ims.mChangedStart > newEnd) {
7974                            ims.mChangedStart = newEnd;
7975                        }
7976                    }
7977                } else {
7978                    if (DEBUG_EXTRACT) Log.v(LOG_TAG, "Span change outside of batch: "
7979                            + oldStart + "-" + oldEnd + ","
7980                            + newStart + "-" + newEnd + " " + what);
7981                    ims.mContentChanged = true;
7982                }
7983            }
7984        }
7985
7986        if (mEditor != null && mEditor.mSpellChecker != null && newStart < 0 &&
7987                what instanceof SpellCheckSpan) {
7988            mEditor.mSpellChecker.onSpellCheckSpanRemoved((SpellCheckSpan) what);
7989        }
7990    }
7991
7992    /**
7993     * @hide
7994     */
7995    @Override
7996    public void dispatchFinishTemporaryDetach() {
7997        mDispatchTemporaryDetach = true;
7998        super.dispatchFinishTemporaryDetach();
7999        mDispatchTemporaryDetach = false;
8000    }
8001
8002    @Override
8003    public void onStartTemporaryDetach() {
8004        super.onStartTemporaryDetach();
8005        // Only track when onStartTemporaryDetach() is called directly,
8006        // usually because this instance is an editable field in a list
8007        if (!mDispatchTemporaryDetach) mTemporaryDetach = true;
8008
8009        // Tell the editor that we are temporarily detached. It can use this to preserve
8010        // selection state as needed.
8011        if (mEditor != null) mEditor.mTemporaryDetach = true;
8012    }
8013
8014    @Override
8015    public void onFinishTemporaryDetach() {
8016        super.onFinishTemporaryDetach();
8017        // Only track when onStartTemporaryDetach() is called directly,
8018        // usually because this instance is an editable field in a list
8019        if (!mDispatchTemporaryDetach) mTemporaryDetach = false;
8020        if (mEditor != null) mEditor.mTemporaryDetach = false;
8021    }
8022
8023    @Override
8024    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
8025        if (mTemporaryDetach) {
8026            // If we are temporarily in the detach state, then do nothing.
8027            super.onFocusChanged(focused, direction, previouslyFocusedRect);
8028            return;
8029        }
8030
8031        if (mEditor != null) mEditor.onFocusChanged(focused, direction);
8032
8033        if (focused) {
8034            if (mText instanceof Spannable) {
8035                Spannable sp = (Spannable) mText;
8036                MetaKeyKeyListener.resetMetaState(sp);
8037            }
8038        }
8039
8040        startStopMarquee(focused);
8041
8042        if (mTransformation != null) {
8043            mTransformation.onFocusChanged(this, mText, focused, direction, previouslyFocusedRect);
8044        }
8045
8046        super.onFocusChanged(focused, direction, previouslyFocusedRect);
8047    }
8048
8049    @Override
8050    public void onWindowFocusChanged(boolean hasWindowFocus) {
8051        super.onWindowFocusChanged(hasWindowFocus);
8052
8053        if (mEditor != null) mEditor.onWindowFocusChanged(hasWindowFocus);
8054
8055        startStopMarquee(hasWindowFocus);
8056    }
8057
8058    @Override
8059    protected void onVisibilityChanged(View changedView, int visibility) {
8060        super.onVisibilityChanged(changedView, visibility);
8061        if (mEditor != null && visibility != VISIBLE) {
8062            mEditor.hideControllers();
8063        }
8064    }
8065
8066    /**
8067     * Use {@link BaseInputConnection#removeComposingSpans
8068     * BaseInputConnection.removeComposingSpans()} to remove any IME composing
8069     * state from this text view.
8070     */
8071    public void clearComposingText() {
8072        if (mText instanceof Spannable) {
8073            BaseInputConnection.removeComposingSpans((Spannable)mText);
8074        }
8075    }
8076
8077    @Override
8078    public void setSelected(boolean selected) {
8079        boolean wasSelected = isSelected();
8080
8081        super.setSelected(selected);
8082
8083        if (selected != wasSelected && mEllipsize == TextUtils.TruncateAt.MARQUEE) {
8084            if (selected) {
8085                startMarquee();
8086            } else {
8087                stopMarquee();
8088            }
8089        }
8090    }
8091
8092    @Override
8093    public boolean onTouchEvent(MotionEvent event) {
8094        final int action = event.getActionMasked();
8095
8096        if (mEditor != null) mEditor.onTouchEvent(event);
8097
8098        final boolean superResult = super.onTouchEvent(event);
8099
8100        /*
8101         * Don't handle the release after a long press, because it will
8102         * move the selection away from whatever the menu action was
8103         * trying to affect.
8104         */
8105        if (mEditor != null && mEditor.mDiscardNextActionUp && action == MotionEvent.ACTION_UP) {
8106            mEditor.mDiscardNextActionUp = false;
8107            return superResult;
8108        }
8109
8110        final boolean touchIsFinished = (action == MotionEvent.ACTION_UP) &&
8111                (mEditor == null || !mEditor.mIgnoreActionUpEvent) && isFocused();
8112
8113         if ((mMovement != null || onCheckIsTextEditor()) && isEnabled()
8114                && mText instanceof Spannable && mLayout != null) {
8115            boolean handled = false;
8116
8117            if (mMovement != null) {
8118                handled |= mMovement.onTouchEvent(this, (Spannable) mText, event);
8119            }
8120
8121            final boolean textIsSelectable = isTextSelectable();
8122            if (touchIsFinished && mLinksClickable && mAutoLinkMask != 0 && textIsSelectable) {
8123                // The LinkMovementMethod which should handle taps on links has not been installed
8124                // on non editable text that support text selection.
8125                // We reproduce its behavior here to open links for these.
8126                ClickableSpan[] links = ((Spannable) mText).getSpans(getSelectionStart(),
8127                        getSelectionEnd(), ClickableSpan.class);
8128
8129                if (links.length > 0) {
8130                    links[0].onClick(this);
8131                    handled = true;
8132                }
8133            }
8134
8135            if (touchIsFinished && (isTextEditable() || textIsSelectable)) {
8136                // Show the IME, except when selecting in read-only text.
8137                final InputMethodManager imm = InputMethodManager.peekInstance();
8138                viewClicked(imm);
8139                if (!textIsSelectable && mEditor.mShowSoftInputOnFocus) {
8140                    handled |= imm != null && imm.showSoftInput(this, 0);
8141                }
8142
8143                // The above condition ensures that the mEditor is not null
8144                mEditor.onTouchUpEvent(event);
8145
8146                handled = true;
8147            }
8148
8149            if (handled) {
8150                return true;
8151            }
8152        }
8153
8154        return superResult;
8155    }
8156
8157    @Override
8158    public boolean onGenericMotionEvent(MotionEvent event) {
8159        if (mMovement != null && mText instanceof Spannable && mLayout != null) {
8160            try {
8161                if (mMovement.onGenericMotionEvent(this, (Spannable) mText, event)) {
8162                    return true;
8163                }
8164            } catch (AbstractMethodError ex) {
8165                // onGenericMotionEvent was added to the MovementMethod interface in API 12.
8166                // Ignore its absence in case third party applications implemented the
8167                // interface directly.
8168            }
8169        }
8170        return super.onGenericMotionEvent(event);
8171    }
8172
8173    /**
8174     * @return True iff this TextView contains a text that can be edited, or if this is
8175     * a selectable TextView.
8176     */
8177    boolean isTextEditable() {
8178        return mText instanceof Editable && onCheckIsTextEditor() && isEnabled();
8179    }
8180
8181    /**
8182     * Returns true, only while processing a touch gesture, if the initial
8183     * touch down event caused focus to move to the text view and as a result
8184     * its selection changed.  Only valid while processing the touch gesture
8185     * of interest, in an editable text view.
8186     */
8187    public boolean didTouchFocusSelect() {
8188        return mEditor != null && mEditor.mTouchFocusSelected;
8189    }
8190
8191    @Override
8192    public void cancelLongPress() {
8193        super.cancelLongPress();
8194        if (mEditor != null) mEditor.mIgnoreActionUpEvent = true;
8195    }
8196
8197    @Override
8198    public boolean onTrackballEvent(MotionEvent event) {
8199        if (mMovement != null && mText instanceof Spannable && mLayout != null) {
8200            if (mMovement.onTrackballEvent(this, (Spannable) mText, event)) {
8201                return true;
8202            }
8203        }
8204
8205        return super.onTrackballEvent(event);
8206    }
8207
8208    public void setScroller(Scroller s) {
8209        mScroller = s;
8210    }
8211
8212    @Override
8213    protected float getLeftFadingEdgeStrength() {
8214        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
8215                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
8216            if (mMarquee != null && !mMarquee.isStopped()) {
8217                final Marquee marquee = mMarquee;
8218                if (marquee.shouldDrawLeftFade()) {
8219                    final float scroll = marquee.getScroll();
8220                    return scroll / getHorizontalFadingEdgeLength();
8221                } else {
8222                    return 0.0f;
8223                }
8224            } else if (getLineCount() == 1) {
8225                final int layoutDirection = getLayoutDirection();
8226                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8227                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8228                    case Gravity.LEFT:
8229                        return 0.0f;
8230                    case Gravity.RIGHT:
8231                        return (mLayout.getLineRight(0) - (mRight - mLeft) -
8232                                getCompoundPaddingLeft() - getCompoundPaddingRight() -
8233                                mLayout.getLineLeft(0)) / getHorizontalFadingEdgeLength();
8234                    case Gravity.CENTER_HORIZONTAL:
8235                    case Gravity.FILL_HORIZONTAL:
8236                        final int textDirection = mLayout.getParagraphDirection(0);
8237                        if (textDirection == Layout.DIR_LEFT_TO_RIGHT) {
8238                            return 0.0f;
8239                        } else {
8240                            return (mLayout.getLineRight(0) - (mRight - mLeft) -
8241                                getCompoundPaddingLeft() - getCompoundPaddingRight() -
8242                                mLayout.getLineLeft(0)) / getHorizontalFadingEdgeLength();
8243                        }
8244                }
8245            }
8246        }
8247        return super.getLeftFadingEdgeStrength();
8248    }
8249
8250    @Override
8251    protected float getRightFadingEdgeStrength() {
8252        if (mEllipsize == TextUtils.TruncateAt.MARQUEE &&
8253                mMarqueeFadeMode != MARQUEE_FADE_SWITCH_SHOW_ELLIPSIS) {
8254            if (mMarquee != null && !mMarquee.isStopped()) {
8255                final Marquee marquee = mMarquee;
8256                final float maxFadeScroll = marquee.getMaxFadeScroll();
8257                final float scroll = marquee.getScroll();
8258                return (maxFadeScroll - scroll) / getHorizontalFadingEdgeLength();
8259            } else if (getLineCount() == 1) {
8260                final int layoutDirection = getLayoutDirection();
8261                final int absoluteGravity = Gravity.getAbsoluteGravity(mGravity, layoutDirection);
8262                switch (absoluteGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
8263                    case Gravity.LEFT:
8264                        final int textWidth = (mRight - mLeft) - getCompoundPaddingLeft() -
8265                                getCompoundPaddingRight();
8266                        final float lineWidth = mLayout.getLineWidth(0);
8267                        return (lineWidth - textWidth) / getHorizontalFadingEdgeLength();
8268                    case Gravity.RIGHT:
8269                        return 0.0f;
8270                    case Gravity.CENTER_HORIZONTAL:
8271                    case Gravity.FILL_HORIZONTAL:
8272                        final int textDirection = mLayout.getParagraphDirection(0);
8273                        if (textDirection == Layout.DIR_RIGHT_TO_LEFT) {
8274                            return 0.0f;
8275                        } else {
8276                            return (mLayout.getLineWidth(0) - ((mRight - mLeft) -
8277                                getCompoundPaddingLeft() - getCompoundPaddingRight())) /
8278                                getHorizontalFadingEdgeLength();
8279                        }
8280                }
8281            }
8282        }
8283        return super.getRightFadingEdgeStrength();
8284    }
8285
8286    @Override
8287    protected int computeHorizontalScrollRange() {
8288        if (mLayout != null) {
8289            return mSingleLine && (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) == Gravity.LEFT ?
8290                    (int) mLayout.getLineWidth(0) : mLayout.getWidth();
8291        }
8292
8293        return super.computeHorizontalScrollRange();
8294    }
8295
8296    @Override
8297    protected int computeVerticalScrollRange() {
8298        if (mLayout != null)
8299            return mLayout.getHeight();
8300
8301        return super.computeVerticalScrollRange();
8302    }
8303
8304    @Override
8305    protected int computeVerticalScrollExtent() {
8306        return getHeight() - getCompoundPaddingTop() - getCompoundPaddingBottom();
8307    }
8308
8309    @Override
8310    public void findViewsWithText(ArrayList<View> outViews, CharSequence searched, int flags) {
8311        super.findViewsWithText(outViews, searched, flags);
8312        if (!outViews.contains(this) && (flags & FIND_VIEWS_WITH_TEXT) != 0
8313                && !TextUtils.isEmpty(searched) && !TextUtils.isEmpty(mText)) {
8314            String searchedLowerCase = searched.toString().toLowerCase();
8315            String textLowerCase = mText.toString().toLowerCase();
8316            if (textLowerCase.contains(searchedLowerCase)) {
8317                outViews.add(this);
8318            }
8319        }
8320    }
8321
8322    public enum BufferType {
8323        NORMAL, SPANNABLE, EDITABLE,
8324    }
8325
8326    /**
8327     * Returns the TextView_textColor attribute from the TypedArray, if set, or
8328     * the TextAppearance_textColor from the TextView_textAppearance attribute,
8329     * if TextView_textColor was not set directly.
8330     *
8331     * @removed
8332     */
8333    public static ColorStateList getTextColors(Context context, TypedArray attrs) {
8334        if (attrs == null) {
8335            // Preserve behavior prior to removal of this API.
8336            throw new NullPointerException();
8337        }
8338
8339        // It's not safe to use this method from apps. The parameter 'attrs'
8340        // must have been obtained using the TextView filter array which is not
8341        // available to the SDK. As such, we grab a default TypedArray with the
8342        // right filter instead here.
8343        final TypedArray a = context.obtainStyledAttributes(R.styleable.TextView);
8344        ColorStateList colors = a.getColorStateList(R.styleable.TextView_textColor);
8345        if (colors == null) {
8346            final int ap = a.getResourceId(R.styleable.TextView_textAppearance, 0);
8347            if (ap != 0) {
8348                final TypedArray appearance = context.obtainStyledAttributes(
8349                        ap, R.styleable.TextAppearance);
8350                colors = appearance.getColorStateList(R.styleable.TextAppearance_textColor);
8351                appearance.recycle();
8352            }
8353        }
8354        a.recycle();
8355
8356        return colors;
8357    }
8358
8359    /**
8360     * Returns the default color from the TextView_textColor attribute from the
8361     * AttributeSet, if set, or the default color from the
8362     * TextAppearance_textColor from the TextView_textAppearance attribute, if
8363     * TextView_textColor was not set directly.
8364     *
8365     * @removed
8366     */
8367    public static int getTextColor(Context context, TypedArray attrs, int def) {
8368        final ColorStateList colors = getTextColors(context, attrs);
8369        if (colors == null) {
8370            return def;
8371        } else {
8372            return colors.getDefaultColor();
8373        }
8374    }
8375
8376    @Override
8377    public boolean onKeyShortcut(int keyCode, KeyEvent event) {
8378        final int filteredMetaState = event.getMetaState() & ~KeyEvent.META_CTRL_MASK;
8379        if (KeyEvent.metaStateHasNoModifiers(filteredMetaState)) {
8380            switch (keyCode) {
8381            case KeyEvent.KEYCODE_A:
8382                if (canSelectText()) {
8383                    return onTextContextMenuItem(ID_SELECT_ALL);
8384                }
8385                break;
8386            case KeyEvent.KEYCODE_X:
8387                if (canCut()) {
8388                    return onTextContextMenuItem(ID_CUT);
8389                }
8390                break;
8391            case KeyEvent.KEYCODE_C:
8392                if (canCopy()) {
8393                    return onTextContextMenuItem(ID_COPY);
8394                }
8395                break;
8396            case KeyEvent.KEYCODE_V:
8397                if (canPaste()) {
8398                    return onTextContextMenuItem(ID_PASTE);
8399                }
8400                break;
8401            }
8402        }
8403        return super.onKeyShortcut(keyCode, event);
8404    }
8405
8406    /**
8407     * Unlike {@link #textCanBeSelected()}, this method is based on the <i>current</i> state of the
8408     * TextView. {@link #textCanBeSelected()} has to be true (this is one of the conditions to have
8409     * a selection controller (see {@link Editor#prepareCursorControllers()}), but this is not
8410     * sufficient.
8411     */
8412    private boolean canSelectText() {
8413        return mText.length() != 0 && mEditor != null && mEditor.hasSelectionController();
8414    }
8415
8416    /**
8417     * Test based on the <i>intrinsic</i> charateristics of the TextView.
8418     * The text must be spannable and the movement method must allow for arbitary selection.
8419     *
8420     * See also {@link #canSelectText()}.
8421     */
8422    boolean textCanBeSelected() {
8423        // prepareCursorController() relies on this method.
8424        // If you change this condition, make sure prepareCursorController is called anywhere
8425        // the value of this condition might be changed.
8426        if (mMovement == null || !mMovement.canSelectArbitrarily()) return false;
8427        return isTextEditable() ||
8428                (isTextSelectable() && mText instanceof Spannable && isEnabled());
8429    }
8430
8431    private Locale getTextServicesLocale(boolean allowNullLocale) {
8432        // Start fetching the text services locale asynchronously.
8433        updateTextServicesLocaleAsync();
8434        // If !allowNullLocale and there is no cached text services locale, just return the default
8435        // locale.
8436        return (mCurrentSpellCheckerLocaleCache == null && !allowNullLocale) ? Locale.getDefault()
8437                : mCurrentSpellCheckerLocaleCache;
8438    }
8439
8440    /**
8441     * This is a temporary method. Future versions may support multi-locale text.
8442     * Caveat: This method may not return the latest text services locale, but this should be
8443     * acceptable and it's more important to make this method asynchronous.
8444     *
8445     * @return The locale that should be used for a word iterator
8446     * in this TextView, based on the current spell checker settings,
8447     * the current IME's locale, or the system default locale.
8448     * Please note that a word iterator in this TextView is different from another word iterator
8449     * used by SpellChecker.java of TextView. This method should be used for the former.
8450     * @hide
8451     */
8452    // TODO: Support multi-locale
8453    // TODO: Update the text services locale immediately after the keyboard locale is switched
8454    // by catching intent of keyboard switch event
8455    public Locale getTextServicesLocale() {
8456        return getTextServicesLocale(false /* allowNullLocale */);
8457    }
8458
8459    /**
8460     * This is a temporary method. Future versions may support multi-locale text.
8461     * Caveat: This method may not return the latest spell checker locale, but this should be
8462     * acceptable and it's more important to make this method asynchronous.
8463     *
8464     * @return The locale that should be used for a spell checker in this TextView,
8465     * based on the current spell checker settings, the current IME's locale, or the system default
8466     * locale.
8467     * @hide
8468     */
8469    public Locale getSpellCheckerLocale() {
8470        return getTextServicesLocale(true /* allowNullLocale */);
8471    }
8472
8473    private void updateTextServicesLocaleAsync() {
8474        // AsyncTask.execute() uses a serial executor which means we don't have
8475        // to lock around updateTextServicesLocaleLocked() to prevent it from
8476        // being executed n times in parallel.
8477        AsyncTask.execute(new Runnable() {
8478            @Override
8479            public void run() {
8480                updateTextServicesLocaleLocked();
8481            }
8482        });
8483    }
8484
8485    private void updateTextServicesLocaleLocked() {
8486        final TextServicesManager textServicesManager = (TextServicesManager)
8487                mContext.getSystemService(Context.TEXT_SERVICES_MANAGER_SERVICE);
8488        final SpellCheckerSubtype subtype = textServicesManager.getCurrentSpellCheckerSubtype(true);
8489        final Locale locale;
8490        if (subtype != null) {
8491            locale = SpellCheckerSubtype.constructLocaleFromString(subtype.getLocale());
8492        } else {
8493            locale = null;
8494        }
8495        mCurrentSpellCheckerLocaleCache = locale;
8496    }
8497
8498    void onLocaleChanged() {
8499        // Will be re-created on demand in getWordIterator with the proper new locale
8500        mEditor.mWordIterator = null;
8501    }
8502
8503    /**
8504     * This method is used by the ArrowKeyMovementMethod to jump from one word to the other.
8505     * Made available to achieve a consistent behavior.
8506     * @hide
8507     */
8508    public WordIterator getWordIterator() {
8509        if (mEditor != null) {
8510            return mEditor.getWordIterator();
8511        } else {
8512            return null;
8513        }
8514    }
8515
8516    /** @hide */
8517    @Override
8518    public void onPopulateAccessibilityEventInternal(AccessibilityEvent event) {
8519        super.onPopulateAccessibilityEventInternal(event);
8520
8521        final boolean isPassword = hasPasswordTransformationMethod();
8522        if (!isPassword || shouldSpeakPasswordsForAccessibility()) {
8523            final CharSequence text = getTextForAccessibility();
8524            if (!TextUtils.isEmpty(text)) {
8525                event.getText().add(text);
8526            }
8527        }
8528    }
8529
8530    /**
8531     * @return true if the user has explicitly allowed accessibility services
8532     * to speak passwords.
8533     */
8534    private boolean shouldSpeakPasswordsForAccessibility() {
8535        return (Settings.Secure.getIntForUser(mContext.getContentResolver(),
8536                Settings.Secure.ACCESSIBILITY_SPEAK_PASSWORD, 0,
8537                UserHandle.USER_CURRENT_OR_SELF) == 1);
8538    }
8539
8540    @Override
8541    public CharSequence getAccessibilityClassName() {
8542        return TextView.class.getName();
8543    }
8544
8545    @Override
8546    public void onProvideAssistData(ViewAssistData data, Bundle extras) {
8547        super.onProvideAssistData(data, extras);
8548        final boolean isPassword = hasPasswordTransformationMethod();
8549        if (!isPassword) {
8550            data.setText(getText(), getSelectionStart(), getSelectionEnd());
8551        }
8552        data.setHint(getHint());
8553    }
8554
8555    /** @hide */
8556    @Override
8557    public void onInitializeAccessibilityEventInternal(AccessibilityEvent event) {
8558        super.onInitializeAccessibilityEventInternal(event);
8559
8560        final boolean isPassword = hasPasswordTransformationMethod();
8561        event.setPassword(isPassword);
8562
8563        if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED) {
8564            event.setFromIndex(Selection.getSelectionStart(mText));
8565            event.setToIndex(Selection.getSelectionEnd(mText));
8566            event.setItemCount(mText.length());
8567        }
8568    }
8569
8570    /** @hide */
8571    @Override
8572    public void onInitializeAccessibilityNodeInfoInternal(AccessibilityNodeInfo info) {
8573        super.onInitializeAccessibilityNodeInfoInternal(info);
8574
8575        final boolean isPassword = hasPasswordTransformationMethod();
8576        info.setPassword(isPassword);
8577
8578        if (!isPassword || shouldSpeakPasswordsForAccessibility()) {
8579            info.setText(getTextForAccessibility());
8580        }
8581
8582        if (mBufferType == BufferType.EDITABLE) {
8583            info.setEditable(true);
8584        }
8585
8586        if (mEditor != null) {
8587            info.setInputType(mEditor.mInputType);
8588
8589            if (mEditor.mError != null) {
8590                info.setContentInvalid(true);
8591                info.setError(mEditor.mError);
8592            }
8593        }
8594
8595        if (!TextUtils.isEmpty(mText)) {
8596            info.addAction(AccessibilityNodeInfo.ACTION_NEXT_AT_MOVEMENT_GRANULARITY);
8597            info.addAction(AccessibilityNodeInfo.ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY);
8598            info.setMovementGranularities(AccessibilityNodeInfo.MOVEMENT_GRANULARITY_CHARACTER
8599                    | AccessibilityNodeInfo.MOVEMENT_GRANULARITY_WORD
8600                    | AccessibilityNodeInfo.MOVEMENT_GRANULARITY_LINE
8601                    | AccessibilityNodeInfo.MOVEMENT_GRANULARITY_PARAGRAPH
8602                    | AccessibilityNodeInfo.MOVEMENT_GRANULARITY_PAGE);
8603        }
8604
8605        if (isFocused()) {
8606            if (canSelectText()) {
8607                info.addAction(AccessibilityNodeInfo.ACTION_SET_SELECTION);
8608            }
8609            if (canCopy()) {
8610                info.addAction(AccessibilityNodeInfo.ACTION_COPY);
8611            }
8612            if (canPaste()) {
8613                info.addAction(AccessibilityNodeInfo.ACTION_PASTE);
8614            }
8615            if (canCut()) {
8616                info.addAction(AccessibilityNodeInfo.ACTION_CUT);
8617            }
8618        }
8619
8620        // Check for known input filter types.
8621        final int numFilters = mFilters.length;
8622        for (int i = 0; i < numFilters; i++) {
8623            final InputFilter filter = mFilters[i];
8624            if (filter instanceof InputFilter.LengthFilter) {
8625                info.setMaxTextLength(((InputFilter.LengthFilter) filter).getMax());
8626            }
8627        }
8628
8629        if (!isSingleLine()) {
8630            info.setMultiLine(true);
8631        }
8632    }
8633
8634    /**
8635     * Performs an accessibility action after it has been offered to the
8636     * delegate.
8637     *
8638     * @hide
8639     */
8640    @Override
8641    public boolean performAccessibilityActionInternal(int action, Bundle arguments) {
8642        switch (action) {
8643            case AccessibilityNodeInfo.ACTION_CLICK: {
8644                boolean handled = false;
8645
8646                // Simulate View.onTouchEvent for an ACTION_UP event.
8647                if (isClickable() || isLongClickable()) {
8648                    if (isFocusable() && !isFocused()) {
8649                        requestFocus();
8650                    }
8651
8652                    performClick();
8653                    handled = true;
8654                }
8655
8656                // Simulate TextView.onTouchEvent for an ACTION_UP event.
8657                if ((mMovement != null || onCheckIsTextEditor()) && isEnabled()
8658                        && mText instanceof Spannable && mLayout != null
8659                        && (isTextEditable() || isTextSelectable()) && isFocused()) {
8660                    // Show the IME, except when selecting in read-only text.
8661                    final InputMethodManager imm = InputMethodManager.peekInstance();
8662                    viewClicked(imm);
8663                    if (!isTextSelectable() && mEditor.mShowSoftInputOnFocus && imm != null) {
8664                        handled |= imm.showSoftInput(this, 0);
8665                    }
8666                }
8667
8668                return handled;
8669            }
8670            case AccessibilityNodeInfo.ACTION_COPY: {
8671                if (isFocused() && canCopy()) {
8672                    if (onTextContextMenuItem(ID_COPY)) {
8673                        return true;
8674                    }
8675                }
8676            } return false;
8677            case AccessibilityNodeInfo.ACTION_PASTE: {
8678                if (isFocused() && canPaste()) {
8679                    if (onTextContextMenuItem(ID_PASTE)) {
8680                        return true;
8681                    }
8682                }
8683            } return false;
8684            case AccessibilityNodeInfo.ACTION_CUT: {
8685                if (isFocused() && canCut()) {
8686                    if (onTextContextMenuItem(ID_CUT)) {
8687                        return true;
8688                    }
8689                }
8690            } return false;
8691            case AccessibilityNodeInfo.ACTION_SET_SELECTION: {
8692                if (isFocused() && canSelectText()) {
8693                    ensureIterableTextForAccessibilitySelectable();
8694                    CharSequence text = getIterableTextForAccessibility();
8695                    if (text == null) {
8696                        return false;
8697                    }
8698                    final int start = (arguments != null) ? arguments.getInt(
8699                            AccessibilityNodeInfo.ACTION_ARGUMENT_SELECTION_START_INT, -1) : -1;
8700                    final int end = (arguments != null) ? arguments.getInt(
8701                            AccessibilityNodeInfo.ACTION_ARGUMENT_SELECTION_END_INT, -1) : -1;
8702                    if ((getSelectionStart() != start || getSelectionEnd() != end)) {
8703                        // No arguments clears the selection.
8704                        if (start == end && end == -1) {
8705                            Selection.removeSelection((Spannable) text);
8706                            return true;
8707                        }
8708                        if (start >= 0 && start <= end && end <= text.length()) {
8709                            Selection.setSelection((Spannable) text, start, end);
8710                            // Make sure selection mode is engaged.
8711                            if (mEditor != null) {
8712                                mEditor.startSelectionActionMode();
8713                            }
8714                            return true;
8715                        }
8716                    }
8717                }
8718            } return false;
8719            case AccessibilityNodeInfo.ACTION_NEXT_AT_MOVEMENT_GRANULARITY:
8720            case AccessibilityNodeInfo.ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY: {
8721                ensureIterableTextForAccessibilitySelectable();
8722                return super.performAccessibilityActionInternal(action, arguments);
8723            }
8724            default: {
8725                return super.performAccessibilityActionInternal(action, arguments);
8726            }
8727        }
8728    }
8729
8730    /** @hide */
8731    @Override
8732    public void sendAccessibilityEventInternal(int eventType) {
8733        // Do not send scroll events since first they are not interesting for
8734        // accessibility and second such events a generated too frequently.
8735        // For details see the implementation of bringTextIntoView().
8736        if (eventType == AccessibilityEvent.TYPE_VIEW_SCROLLED) {
8737            return;
8738        }
8739        super.sendAccessibilityEventInternal(eventType);
8740    }
8741
8742    /**
8743     * Gets the text reported for accessibility purposes.
8744     *
8745     * @return The accessibility text.
8746     *
8747     * @hide
8748     */
8749    public CharSequence getTextForAccessibility() {
8750        CharSequence text = getText();
8751        if (TextUtils.isEmpty(text)) {
8752            text = getHint();
8753        }
8754        return text;
8755    }
8756
8757    void sendAccessibilityEventTypeViewTextChanged(CharSequence beforeText,
8758            int fromIndex, int removedCount, int addedCount) {
8759        AccessibilityEvent event =
8760            AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
8761        event.setFromIndex(fromIndex);
8762        event.setRemovedCount(removedCount);
8763        event.setAddedCount(addedCount);
8764        event.setBeforeText(beforeText);
8765        sendAccessibilityEventUnchecked(event);
8766    }
8767
8768    /**
8769     * Returns whether this text view is a current input method target.  The
8770     * default implementation just checks with {@link InputMethodManager}.
8771     */
8772    public boolean isInputMethodTarget() {
8773        InputMethodManager imm = InputMethodManager.peekInstance();
8774        return imm != null && imm.isActive(this);
8775    }
8776
8777    static final int ID_SELECT_ALL = android.R.id.selectAll;
8778    static final int ID_CUT = android.R.id.cut;
8779    static final int ID_COPY = android.R.id.copy;
8780    static final int ID_PASTE = android.R.id.paste;
8781
8782    /**
8783     * Called when a context menu option for the text view is selected.  Currently
8784     * this will be one of {@link android.R.id#selectAll}, {@link android.R.id#cut},
8785     * {@link android.R.id#copy} or {@link android.R.id#paste}.
8786     *
8787     * @return true if the context menu item action was performed.
8788     */
8789    public boolean onTextContextMenuItem(int id) {
8790        int min = 0;
8791        int max = mText.length();
8792
8793        if (isFocused()) {
8794            final int selStart = getSelectionStart();
8795            final int selEnd = getSelectionEnd();
8796
8797            min = Math.max(0, Math.min(selStart, selEnd));
8798            max = Math.max(0, Math.max(selStart, selEnd));
8799        }
8800
8801        switch (id) {
8802            case ID_SELECT_ALL:
8803                // This does not enter text selection mode. Text is highlighted, so that it can be
8804                // bulk edited, like selectAllOnFocus does. Returns true even if text is empty.
8805                selectAllText();
8806                return true;
8807
8808            case ID_PASTE:
8809                paste(min, max);
8810                return true;
8811
8812            case ID_CUT:
8813                setPrimaryClip(ClipData.newPlainText(null, getTransformedText(min, max)));
8814                deleteText_internal(min, max);
8815                stopSelectionActionMode();
8816                return true;
8817
8818            case ID_COPY:
8819                setPrimaryClip(ClipData.newPlainText(null, getTransformedText(min, max)));
8820                stopSelectionActionMode();
8821                return true;
8822        }
8823        return false;
8824    }
8825
8826    CharSequence getTransformedText(int start, int end) {
8827        return removeSuggestionSpans(mTransformed.subSequence(start, end));
8828    }
8829
8830    @Override
8831    public boolean performLongClick() {
8832        boolean handled = false;
8833
8834        if (super.performLongClick()) {
8835            handled = true;
8836        }
8837
8838        if (mEditor != null) {
8839            handled |= mEditor.performLongClick(handled);
8840        }
8841
8842        if (handled) {
8843            performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
8844            if (mEditor != null) mEditor.mDiscardNextActionUp = true;
8845        }
8846
8847        return handled;
8848    }
8849
8850    @Override
8851    protected void onScrollChanged(int horiz, int vert, int oldHoriz, int oldVert) {
8852        super.onScrollChanged(horiz, vert, oldHoriz, oldVert);
8853        if (mEditor != null) {
8854            mEditor.onScrollChanged();
8855        }
8856    }
8857
8858    /**
8859     * Return whether or not suggestions are enabled on this TextView. The suggestions are generated
8860     * by the IME or by the spell checker as the user types. This is done by adding
8861     * {@link SuggestionSpan}s to the text.
8862     *
8863     * When suggestions are enabled (default), this list of suggestions will be displayed when the
8864     * user asks for them on these parts of the text. This value depends on the inputType of this
8865     * TextView.
8866     *
8867     * The class of the input type must be {@link InputType#TYPE_CLASS_TEXT}.
8868     *
8869     * In addition, the type variation must be one of
8870     * {@link InputType#TYPE_TEXT_VARIATION_NORMAL},
8871     * {@link InputType#TYPE_TEXT_VARIATION_EMAIL_SUBJECT},
8872     * {@link InputType#TYPE_TEXT_VARIATION_LONG_MESSAGE},
8873     * {@link InputType#TYPE_TEXT_VARIATION_SHORT_MESSAGE} or
8874     * {@link InputType#TYPE_TEXT_VARIATION_WEB_EDIT_TEXT}.
8875     *
8876     * And finally, the {@link InputType#TYPE_TEXT_FLAG_NO_SUGGESTIONS} flag must <i>not</i> be set.
8877     *
8878     * @return true if the suggestions popup window is enabled, based on the inputType.
8879     */
8880    public boolean isSuggestionsEnabled() {
8881        if (mEditor == null) return false;
8882        if ((mEditor.mInputType & InputType.TYPE_MASK_CLASS) != InputType.TYPE_CLASS_TEXT) {
8883            return false;
8884        }
8885        if ((mEditor.mInputType & InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS) > 0) return false;
8886
8887        final int variation = mEditor.mInputType & EditorInfo.TYPE_MASK_VARIATION;
8888        return (variation == EditorInfo.TYPE_TEXT_VARIATION_NORMAL ||
8889                variation == EditorInfo.TYPE_TEXT_VARIATION_EMAIL_SUBJECT ||
8890                variation == EditorInfo.TYPE_TEXT_VARIATION_LONG_MESSAGE ||
8891                variation == EditorInfo.TYPE_TEXT_VARIATION_SHORT_MESSAGE ||
8892                variation == EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT);
8893    }
8894
8895    /**
8896     * If provided, this ActionMode.Callback will be used to create the ActionMode when text
8897     * selection is initiated in this View.
8898     *
8899     * The standard implementation populates the menu with a subset of Select All, Cut, Copy and
8900     * Paste actions, depending on what this View supports.
8901     *
8902     * A custom implementation can add new entries in the default menu in its
8903     * {@link android.view.ActionMode.Callback#onPrepareActionMode(ActionMode, Menu)} method. The
8904     * default actions can also be removed from the menu using {@link Menu#removeItem(int)} and
8905     * passing {@link android.R.id#selectAll}, {@link android.R.id#cut}, {@link android.R.id#copy}
8906     * or {@link android.R.id#paste} ids as parameters.
8907     *
8908     * Returning false from
8909     * {@link android.view.ActionMode.Callback#onCreateActionMode(ActionMode, Menu)} will prevent
8910     * the action mode from being started.
8911     *
8912     * Action click events should be handled by the custom implementation of
8913     * {@link android.view.ActionMode.Callback#onActionItemClicked(ActionMode, MenuItem)}.
8914     *
8915     * Note that text selection mode is not started when a TextView receives focus and the
8916     * {@link android.R.attr#selectAllOnFocus} flag has been set. The content is highlighted in
8917     * that case, to allow for quick replacement.
8918     */
8919    public void setCustomSelectionActionModeCallback(ActionMode.Callback actionModeCallback) {
8920        createEditorIfNeeded();
8921        mEditor.mCustomSelectionActionModeCallback = actionModeCallback;
8922    }
8923
8924    /**
8925     * Retrieves the value set in {@link #setCustomSelectionActionModeCallback}. Default is null.
8926     *
8927     * @return The current custom selection callback.
8928     */
8929    public ActionMode.Callback getCustomSelectionActionModeCallback() {
8930        return mEditor == null ? null : mEditor.mCustomSelectionActionModeCallback;
8931    }
8932
8933    /**
8934     * @hide
8935     */
8936    protected void stopSelectionActionMode() {
8937        mEditor.stopSelectionActionMode();
8938    }
8939
8940    boolean canCut() {
8941        if (hasPasswordTransformationMethod()) {
8942            return false;
8943        }
8944
8945        if (mText.length() > 0 && hasSelection() && mText instanceof Editable && mEditor != null &&
8946                mEditor.mKeyListener != null) {
8947            return true;
8948        }
8949
8950        return false;
8951    }
8952
8953    boolean canCopy() {
8954        if (hasPasswordTransformationMethod()) {
8955            return false;
8956        }
8957
8958        if (mText.length() > 0 && hasSelection() && mEditor != null) {
8959            return true;
8960        }
8961
8962        return false;
8963    }
8964
8965    boolean canPaste() {
8966        return (mText instanceof Editable &&
8967                mEditor != null && mEditor.mKeyListener != null &&
8968                getSelectionStart() >= 0 &&
8969                getSelectionEnd() >= 0 &&
8970                ((ClipboardManager)getContext().getSystemService(Context.CLIPBOARD_SERVICE)).
8971                hasPrimaryClip());
8972    }
8973
8974    boolean selectAllText() {
8975        final int length = mText.length();
8976        Selection.setSelection((Spannable) mText, 0, length);
8977        return length > 0;
8978    }
8979
8980    /**
8981     * Paste clipboard content between min and max positions.
8982     */
8983    private void paste(int min, int max) {
8984        ClipboardManager clipboard =
8985            (ClipboardManager) getContext().getSystemService(Context.CLIPBOARD_SERVICE);
8986        ClipData clip = clipboard.getPrimaryClip();
8987        if (clip != null) {
8988            boolean didFirst = false;
8989            for (int i=0; i<clip.getItemCount(); i++) {
8990                CharSequence paste = clip.getItemAt(i).coerceToStyledText(getContext());
8991                if (paste != null) {
8992                    if (!didFirst) {
8993                        Selection.setSelection((Spannable) mText, max);
8994                        ((Editable) mText).replace(min, max, paste);
8995                        didFirst = true;
8996                    } else {
8997                        ((Editable) mText).insert(getSelectionEnd(), "\n");
8998                        ((Editable) mText).insert(getSelectionEnd(), paste);
8999                    }
9000                }
9001            }
9002            stopSelectionActionMode();
9003            LAST_CUT_OR_COPY_TIME = 0;
9004        }
9005    }
9006
9007    private void setPrimaryClip(ClipData clip) {
9008        ClipboardManager clipboard = (ClipboardManager) getContext().
9009                getSystemService(Context.CLIPBOARD_SERVICE);
9010        clipboard.setPrimaryClip(clip);
9011        LAST_CUT_OR_COPY_TIME = SystemClock.uptimeMillis();
9012    }
9013
9014    /**
9015     * Get the character offset closest to the specified absolute position. A typical use case is to
9016     * pass the result of {@link MotionEvent#getX()} and {@link MotionEvent#getY()} to this method.
9017     *
9018     * @param x The horizontal absolute position of a point on screen
9019     * @param y The vertical absolute position of a point on screen
9020     * @return the character offset for the character whose position is closest to the specified
9021     *  position. Returns -1 if there is no layout.
9022     */
9023    public int getOffsetForPosition(float x, float y) {
9024        if (getLayout() == null) return -1;
9025        final int line = getLineAtCoordinate(y);
9026        final int offset = getOffsetAtCoordinate(line, x);
9027        return offset;
9028    }
9029
9030    float convertToLocalHorizontalCoordinate(float x) {
9031        x -= getTotalPaddingLeft();
9032        // Clamp the position to inside of the view.
9033        x = Math.max(0.0f, x);
9034        x = Math.min(getWidth() - getTotalPaddingRight() - 1, x);
9035        x += getScrollX();
9036        return x;
9037    }
9038
9039    int getLineAtCoordinate(float y) {
9040        y -= getTotalPaddingTop();
9041        // Clamp the position to inside of the view.
9042        y = Math.max(0.0f, y);
9043        y = Math.min(getHeight() - getTotalPaddingBottom() - 1, y);
9044        y += getScrollY();
9045        return getLayout().getLineForVertical((int) y);
9046    }
9047
9048    private int getOffsetAtCoordinate(int line, float x) {
9049        x = convertToLocalHorizontalCoordinate(x);
9050        return getLayout().getOffsetForHorizontal(line, x);
9051    }
9052
9053    @Override
9054    public boolean onDragEvent(DragEvent event) {
9055        switch (event.getAction()) {
9056            case DragEvent.ACTION_DRAG_STARTED:
9057                return mEditor != null && mEditor.hasInsertionController();
9058
9059            case DragEvent.ACTION_DRAG_ENTERED:
9060                TextView.this.requestFocus();
9061                return true;
9062
9063            case DragEvent.ACTION_DRAG_LOCATION:
9064                final int offset = getOffsetForPosition(event.getX(), event.getY());
9065                Selection.setSelection((Spannable)mText, offset);
9066                return true;
9067
9068            case DragEvent.ACTION_DROP:
9069                if (mEditor != null) mEditor.onDrop(event);
9070                return true;
9071
9072            case DragEvent.ACTION_DRAG_ENDED:
9073            case DragEvent.ACTION_DRAG_EXITED:
9074            default:
9075                return true;
9076        }
9077    }
9078
9079    boolean isInBatchEditMode() {
9080        if (mEditor == null) return false;
9081        final Editor.InputMethodState ims = mEditor.mInputMethodState;
9082        if (ims != null) {
9083            return ims.mBatchEditNesting > 0;
9084        }
9085        return mEditor.mInBatchEditControllers;
9086    }
9087
9088    @Override
9089    public void onRtlPropertiesChanged(int layoutDirection) {
9090        super.onRtlPropertiesChanged(layoutDirection);
9091
9092        mTextDir = getTextDirectionHeuristic();
9093
9094        if (mLayout != null) {
9095            checkForRelayout();
9096        }
9097    }
9098
9099    TextDirectionHeuristic getTextDirectionHeuristic() {
9100        if (hasPasswordTransformationMethod()) {
9101            // passwords fields should be LTR
9102            return TextDirectionHeuristics.LTR;
9103        }
9104
9105        // Always need to resolve layout direction first
9106        final boolean defaultIsRtl = (getLayoutDirection() == LAYOUT_DIRECTION_RTL);
9107
9108        // Now, we can select the heuristic
9109        switch (getTextDirection()) {
9110            default:
9111            case TEXT_DIRECTION_FIRST_STRONG:
9112                return (defaultIsRtl ? TextDirectionHeuristics.FIRSTSTRONG_RTL :
9113                        TextDirectionHeuristics.FIRSTSTRONG_LTR);
9114            case TEXT_DIRECTION_ANY_RTL:
9115                return TextDirectionHeuristics.ANYRTL_LTR;
9116            case TEXT_DIRECTION_LTR:
9117                return TextDirectionHeuristics.LTR;
9118            case TEXT_DIRECTION_RTL:
9119                return TextDirectionHeuristics.RTL;
9120            case TEXT_DIRECTION_LOCALE:
9121                return TextDirectionHeuristics.LOCALE;
9122        }
9123    }
9124
9125    /**
9126     * @hide
9127     */
9128    @Override
9129    public void onResolveDrawables(int layoutDirection) {
9130        // No need to resolve twice
9131        if (mLastLayoutDirection == layoutDirection) {
9132            return;
9133        }
9134        mLastLayoutDirection = layoutDirection;
9135
9136        // Resolve drawables
9137        if (mDrawables != null) {
9138            mDrawables.resolveWithLayoutDirection(layoutDirection);
9139        }
9140    }
9141
9142    /**
9143     * @hide
9144     */
9145    protected void resetResolvedDrawables() {
9146        super.resetResolvedDrawables();
9147        mLastLayoutDirection = -1;
9148    }
9149
9150    /**
9151     * @hide
9152     */
9153    protected void viewClicked(InputMethodManager imm) {
9154        if (imm != null) {
9155            imm.viewClicked(this);
9156        }
9157    }
9158
9159    /**
9160     * Deletes the range of text [start, end[.
9161     * @hide
9162     */
9163    protected void deleteText_internal(int start, int end) {
9164        ((Editable) mText).delete(start, end);
9165    }
9166
9167    /**
9168     * Replaces the range of text [start, end[ by replacement text
9169     * @hide
9170     */
9171    protected void replaceText_internal(int start, int end, CharSequence text) {
9172        ((Editable) mText).replace(start, end, text);
9173    }
9174
9175    /**
9176     * Sets a span on the specified range of text
9177     * @hide
9178     */
9179    protected void setSpan_internal(Object span, int start, int end, int flags) {
9180        ((Editable) mText).setSpan(span, start, end, flags);
9181    }
9182
9183    /**
9184     * Moves the cursor to the specified offset position in text
9185     * @hide
9186     */
9187    protected void setCursorPosition_internal(int start, int end) {
9188        Selection.setSelection(((Editable) mText), start, end);
9189    }
9190
9191    /**
9192     * An Editor should be created as soon as any of the editable-specific fields (grouped
9193     * inside the Editor object) is assigned to a non-default value.
9194     * This method will create the Editor if needed.
9195     *
9196     * A standard TextView (as well as buttons, checkboxes...) should not qualify and hence will
9197     * have a null Editor, unlike an EditText. Inconsistent in-between states will have an
9198     * Editor for backward compatibility, as soon as one of these fields is assigned.
9199     *
9200     * Also note that for performance reasons, the mEditor is created when needed, but not
9201     * reset when no more edit-specific fields are needed.
9202     */
9203    private void createEditorIfNeeded() {
9204        if (mEditor == null) {
9205            mEditor = new Editor(this);
9206        }
9207    }
9208
9209    /**
9210     * @hide
9211     */
9212    @Override
9213    public CharSequence getIterableTextForAccessibility() {
9214        return mText;
9215    }
9216
9217    private void ensureIterableTextForAccessibilitySelectable() {
9218        if (!(mText instanceof Spannable)) {
9219            setText(mText, BufferType.SPANNABLE);
9220        }
9221    }
9222
9223    /**
9224     * @hide
9225     */
9226    @Override
9227    public TextSegmentIterator getIteratorForGranularity(int granularity) {
9228        switch (granularity) {
9229            case AccessibilityNodeInfo.MOVEMENT_GRANULARITY_LINE: {
9230                Spannable text = (Spannable) getIterableTextForAccessibility();
9231                if (!TextUtils.isEmpty(text) && getLayout() != null) {
9232                    AccessibilityIterators.LineTextSegmentIterator iterator =
9233                        AccessibilityIterators.LineTextSegmentIterator.getInstance();
9234                    iterator.initialize(text, getLayout());
9235                    return iterator;
9236                }
9237            } break;
9238            case AccessibilityNodeInfo.MOVEMENT_GRANULARITY_PAGE: {
9239                Spannable text = (Spannable) getIterableTextForAccessibility();
9240                if (!TextUtils.isEmpty(text) && getLayout() != null) {
9241                    AccessibilityIterators.PageTextSegmentIterator iterator =
9242                        AccessibilityIterators.PageTextSegmentIterator.getInstance();
9243                    iterator.initialize(this);
9244                    return iterator;
9245                }
9246            } break;
9247        }
9248        return super.getIteratorForGranularity(granularity);
9249    }
9250
9251    /**
9252     * @hide
9253     */
9254    @Override
9255    public int getAccessibilitySelectionStart() {
9256        return getSelectionStart();
9257    }
9258
9259    /**
9260     * @hide
9261     */
9262    public boolean isAccessibilitySelectionExtendable() {
9263        return true;
9264    }
9265
9266    /**
9267     * @hide
9268     */
9269    @Override
9270    public int getAccessibilitySelectionEnd() {
9271        return getSelectionEnd();
9272    }
9273
9274    /**
9275     * @hide
9276     */
9277    @Override
9278    public void setAccessibilitySelection(int start, int end) {
9279        if (getAccessibilitySelectionStart() == start
9280                && getAccessibilitySelectionEnd() == end) {
9281            return;
9282        }
9283        // Hide all selection controllers used for adjusting selection
9284        // since we are doing so explicitlty by other means and these
9285        // controllers interact with how selection behaves.
9286        if (mEditor != null) {
9287            mEditor.hideControllers();
9288        }
9289        CharSequence text = getIterableTextForAccessibility();
9290        if (Math.min(start, end) >= 0 && Math.max(start, end) <= text.length()) {
9291            Selection.setSelection((Spannable) text, start, end);
9292        } else {
9293            Selection.removeSelection((Spannable) text);
9294        }
9295    }
9296
9297    /**
9298     * User interface state that is stored by TextView for implementing
9299     * {@link View#onSaveInstanceState}.
9300     */
9301    public static class SavedState extends BaseSavedState {
9302        int selStart;
9303        int selEnd;
9304        CharSequence text;
9305        boolean frozenWithFocus;
9306        CharSequence error;
9307
9308        SavedState(Parcelable superState) {
9309            super(superState);
9310        }
9311
9312        @Override
9313        public void writeToParcel(Parcel out, int flags) {
9314            super.writeToParcel(out, flags);
9315            out.writeInt(selStart);
9316            out.writeInt(selEnd);
9317            out.writeInt(frozenWithFocus ? 1 : 0);
9318            TextUtils.writeToParcel(text, out, flags);
9319
9320            if (error == null) {
9321                out.writeInt(0);
9322            } else {
9323                out.writeInt(1);
9324                TextUtils.writeToParcel(error, out, flags);
9325            }
9326        }
9327
9328        @Override
9329        public String toString() {
9330            String str = "TextView.SavedState{"
9331                    + Integer.toHexString(System.identityHashCode(this))
9332                    + " start=" + selStart + " end=" + selEnd;
9333            if (text != null) {
9334                str += " text=" + text;
9335            }
9336            return str + "}";
9337        }
9338
9339        @SuppressWarnings("hiding")
9340        public static final Parcelable.Creator<SavedState> CREATOR
9341                = new Parcelable.Creator<SavedState>() {
9342            public SavedState createFromParcel(Parcel in) {
9343                return new SavedState(in);
9344            }
9345
9346            public SavedState[] newArray(int size) {
9347                return new SavedState[size];
9348            }
9349        };
9350
9351        private SavedState(Parcel in) {
9352            super(in);
9353            selStart = in.readInt();
9354            selEnd = in.readInt();
9355            frozenWithFocus = (in.readInt() != 0);
9356            text = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
9357
9358            if (in.readInt() != 0) {
9359                error = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in);
9360            }
9361        }
9362    }
9363
9364    private static class CharWrapper implements CharSequence, GetChars, GraphicsOperations {
9365        private char[] mChars;
9366        private int mStart, mLength;
9367
9368        public CharWrapper(char[] chars, int start, int len) {
9369            mChars = chars;
9370            mStart = start;
9371            mLength = len;
9372        }
9373
9374        /* package */ void set(char[] chars, int start, int len) {
9375            mChars = chars;
9376            mStart = start;
9377            mLength = len;
9378        }
9379
9380        public int length() {
9381            return mLength;
9382        }
9383
9384        public char charAt(int off) {
9385            return mChars[off + mStart];
9386        }
9387
9388        @Override
9389        public String toString() {
9390            return new String(mChars, mStart, mLength);
9391        }
9392
9393        public CharSequence subSequence(int start, int end) {
9394            if (start < 0 || end < 0 || start > mLength || end > mLength) {
9395                throw new IndexOutOfBoundsException(start + ", " + end);
9396            }
9397
9398            return new String(mChars, start + mStart, end - start);
9399        }
9400
9401        public void getChars(int start, int end, char[] buf, int off) {
9402            if (start < 0 || end < 0 || start > mLength || end > mLength) {
9403                throw new IndexOutOfBoundsException(start + ", " + end);
9404            }
9405
9406            System.arraycopy(mChars, start + mStart, buf, off, end - start);
9407        }
9408
9409        public void drawText(Canvas c, int start, int end,
9410                             float x, float y, Paint p) {
9411            c.drawText(mChars, start + mStart, end - start, x, y, p);
9412        }
9413
9414        public void drawTextRun(Canvas c, int start, int end,
9415                int contextStart, int contextEnd, float x, float y, boolean isRtl, Paint p) {
9416            int count = end - start;
9417            int contextCount = contextEnd - contextStart;
9418            c.drawTextRun(mChars, start + mStart, count, contextStart + mStart,
9419                    contextCount, x, y, isRtl, p);
9420        }
9421
9422        public float measureText(int start, int end, Paint p) {
9423            return p.measureText(mChars, start + mStart, end - start);
9424        }
9425
9426        public int getTextWidths(int start, int end, float[] widths, Paint p) {
9427            return p.getTextWidths(mChars, start + mStart, end - start, widths);
9428        }
9429
9430        public float getTextRunAdvances(int start, int end, int contextStart,
9431                int contextEnd, boolean isRtl, float[] advances, int advancesIndex,
9432                Paint p) {
9433            int count = end - start;
9434            int contextCount = contextEnd - contextStart;
9435            return p.getTextRunAdvances(mChars, start + mStart, count,
9436                    contextStart + mStart, contextCount, isRtl, advances,
9437                    advancesIndex);
9438        }
9439
9440        public int getTextRunCursor(int contextStart, int contextEnd, int dir,
9441                int offset, int cursorOpt, Paint p) {
9442            int contextCount = contextEnd - contextStart;
9443            return p.getTextRunCursor(mChars, contextStart + mStart,
9444                    contextCount, dir, offset + mStart, cursorOpt);
9445        }
9446    }
9447
9448    private static final class Marquee {
9449        // TODO: Add an option to configure this
9450        private static final float MARQUEE_DELTA_MAX = 0.07f;
9451        private static final int MARQUEE_DELAY = 1200;
9452        private static final int MARQUEE_RESTART_DELAY = 1200;
9453        private static final int MARQUEE_DP_PER_SECOND = 30;
9454
9455        private static final byte MARQUEE_STOPPED = 0x0;
9456        private static final byte MARQUEE_STARTING = 0x1;
9457        private static final byte MARQUEE_RUNNING = 0x2;
9458
9459        private final WeakReference<TextView> mView;
9460        private final Choreographer mChoreographer;
9461
9462        private byte mStatus = MARQUEE_STOPPED;
9463        private final float mPixelsPerSecond;
9464        private float mMaxScroll;
9465        private float mMaxFadeScroll;
9466        private float mGhostStart;
9467        private float mGhostOffset;
9468        private float mFadeStop;
9469        private int mRepeatLimit;
9470
9471        private float mScroll;
9472        private long mLastAnimationMs;
9473
9474        Marquee(TextView v) {
9475            final float density = v.getContext().getResources().getDisplayMetrics().density;
9476            mPixelsPerSecond = MARQUEE_DP_PER_SECOND * density;
9477            mView = new WeakReference<TextView>(v);
9478            mChoreographer = Choreographer.getInstance();
9479        }
9480
9481        private Choreographer.FrameCallback mTickCallback = new Choreographer.FrameCallback() {
9482            @Override
9483            public void doFrame(long frameTimeNanos) {
9484                tick();
9485            }
9486        };
9487
9488        private Choreographer.FrameCallback mStartCallback = new Choreographer.FrameCallback() {
9489            @Override
9490            public void doFrame(long frameTimeNanos) {
9491                mStatus = MARQUEE_RUNNING;
9492                mLastAnimationMs = mChoreographer.getFrameTime();
9493                tick();
9494            }
9495        };
9496
9497        private Choreographer.FrameCallback mRestartCallback = new Choreographer.FrameCallback() {
9498            @Override
9499            public void doFrame(long frameTimeNanos) {
9500                if (mStatus == MARQUEE_RUNNING) {
9501                    if (mRepeatLimit >= 0) {
9502                        mRepeatLimit--;
9503                    }
9504                    start(mRepeatLimit);
9505                }
9506            }
9507        };
9508
9509        void tick() {
9510            if (mStatus != MARQUEE_RUNNING) {
9511                return;
9512            }
9513
9514            mChoreographer.removeFrameCallback(mTickCallback);
9515
9516            final TextView textView = mView.get();
9517            if (textView != null && (textView.isFocused() || textView.isSelected())) {
9518                long currentMs = mChoreographer.getFrameTime();
9519                long deltaMs = currentMs - mLastAnimationMs;
9520                mLastAnimationMs = currentMs;
9521                float deltaPx = deltaMs / 1000f * mPixelsPerSecond;
9522                mScroll += deltaPx;
9523                if (mScroll > mMaxScroll) {
9524                    mScroll = mMaxScroll;
9525                    mChoreographer.postFrameCallbackDelayed(mRestartCallback, MARQUEE_DELAY);
9526                } else {
9527                    mChoreographer.postFrameCallback(mTickCallback);
9528                }
9529                textView.invalidate();
9530            }
9531        }
9532
9533        void stop() {
9534            mStatus = MARQUEE_STOPPED;
9535            mChoreographer.removeFrameCallback(mStartCallback);
9536            mChoreographer.removeFrameCallback(mRestartCallback);
9537            mChoreographer.removeFrameCallback(mTickCallback);
9538            resetScroll();
9539        }
9540
9541        private void resetScroll() {
9542            mScroll = 0.0f;
9543            final TextView textView = mView.get();
9544            if (textView != null) textView.invalidate();
9545        }
9546
9547        void start(int repeatLimit) {
9548            if (repeatLimit == 0) {
9549                stop();
9550                return;
9551            }
9552            mRepeatLimit = repeatLimit;
9553            final TextView textView = mView.get();
9554            if (textView != null && textView.mLayout != null) {
9555                mStatus = MARQUEE_STARTING;
9556                mScroll = 0.0f;
9557                final int textWidth = textView.getWidth() - textView.getCompoundPaddingLeft() -
9558                        textView.getCompoundPaddingRight();
9559                final float lineWidth = textView.mLayout.getLineWidth(0);
9560                final float gap = textWidth / 3.0f;
9561                mGhostStart = lineWidth - textWidth + gap;
9562                mMaxScroll = mGhostStart + textWidth;
9563                mGhostOffset = lineWidth + gap;
9564                mFadeStop = lineWidth + textWidth / 6.0f;
9565                mMaxFadeScroll = mGhostStart + lineWidth + lineWidth;
9566
9567                textView.invalidate();
9568                mChoreographer.postFrameCallback(mStartCallback);
9569            }
9570        }
9571
9572        float getGhostOffset() {
9573            return mGhostOffset;
9574        }
9575
9576        float getScroll() {
9577            return mScroll;
9578        }
9579
9580        float getMaxFadeScroll() {
9581            return mMaxFadeScroll;
9582        }
9583
9584        boolean shouldDrawLeftFade() {
9585            return mScroll <= mFadeStop;
9586        }
9587
9588        boolean shouldDrawGhost() {
9589            return mStatus == MARQUEE_RUNNING && mScroll > mGhostStart;
9590        }
9591
9592        boolean isRunning() {
9593            return mStatus == MARQUEE_RUNNING;
9594        }
9595
9596        boolean isStopped() {
9597            return mStatus == MARQUEE_STOPPED;
9598        }
9599    }
9600
9601    private class ChangeWatcher implements TextWatcher, SpanWatcher {
9602
9603        private CharSequence mBeforeText;
9604
9605        public void beforeTextChanged(CharSequence buffer, int start,
9606                                      int before, int after) {
9607            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "beforeTextChanged start=" + start
9608                    + " before=" + before + " after=" + after + ": " + buffer);
9609
9610            if (AccessibilityManager.getInstance(mContext).isEnabled()
9611                    && ((!isPasswordInputType(getInputType()) && !hasPasswordTransformationMethod())
9612                            || shouldSpeakPasswordsForAccessibility())) {
9613                mBeforeText = buffer.toString();
9614            }
9615
9616            TextView.this.sendBeforeTextChanged(buffer, start, before, after);
9617        }
9618
9619        public void onTextChanged(CharSequence buffer, int start, int before, int after) {
9620            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onTextChanged start=" + start
9621                    + " before=" + before + " after=" + after + ": " + buffer);
9622            TextView.this.handleTextChanged(buffer, start, before, after);
9623
9624            if (AccessibilityManager.getInstance(mContext).isEnabled() &&
9625                    (isFocused() || isSelected() && isShown())) {
9626                sendAccessibilityEventTypeViewTextChanged(mBeforeText, start, before, after);
9627                mBeforeText = null;
9628            }
9629        }
9630
9631        public void afterTextChanged(Editable buffer) {
9632            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "afterTextChanged: " + buffer);
9633            TextView.this.sendAfterTextChanged(buffer);
9634
9635            if (MetaKeyKeyListener.getMetaState(buffer, MetaKeyKeyListener.META_SELECTING) != 0) {
9636                MetaKeyKeyListener.stopSelecting(TextView.this, buffer);
9637            }
9638        }
9639
9640        public void onSpanChanged(Spannable buf, Object what, int s, int e, int st, int en) {
9641            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanChanged s=" + s + " e=" + e
9642                    + " st=" + st + " en=" + en + " what=" + what + ": " + buf);
9643            TextView.this.spanChange(buf, what, s, st, e, en);
9644        }
9645
9646        public void onSpanAdded(Spannable buf, Object what, int s, int e) {
9647            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanAdded s=" + s + " e=" + e
9648                    + " what=" + what + ": " + buf);
9649            TextView.this.spanChange(buf, what, -1, s, -1, e);
9650        }
9651
9652        public void onSpanRemoved(Spannable buf, Object what, int s, int e) {
9653            if (DEBUG_EXTRACT) Log.v(LOG_TAG, "onSpanRemoved s=" + s + " e=" + e
9654                    + " what=" + what + ": " + buf);
9655            TextView.this.spanChange(buf, what, s, -1, e, -1);
9656        }
9657    }
9658}
9659