1/*
2 * Copyright (C) 2012 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 com.android.internal.widget;
18
19import android.animation.Animator;
20import android.animation.AnimatorListenerAdapter;
21import android.content.Context;
22import android.content.pm.ActivityInfo;
23import android.content.res.Configuration;
24import android.content.res.TypedArray;
25import android.graphics.Canvas;
26import android.graphics.Rect;
27import android.graphics.drawable.Drawable;
28import android.os.Build;
29import android.os.Parcelable;
30import android.util.AttributeSet;
31import android.util.IntProperty;
32import android.util.Log;
33import android.util.Property;
34import android.util.SparseArray;
35import android.view.Menu;
36import android.view.View;
37import android.view.ViewGroup;
38import android.view.ViewPropertyAnimator;
39import android.view.Window;
40import android.view.WindowInsets;
41import android.widget.OverScroller;
42import android.widget.Toolbar;
43import com.android.internal.view.menu.MenuPresenter;
44
45/**
46 * Special layout for the containing of an overlay action bar (and its
47 * content) to correctly handle fitting system windows when the content
48 * has request that its layout ignore them.
49 */
50public class ActionBarOverlayLayout extends ViewGroup implements DecorContentParent {
51    private static final String TAG = "ActionBarOverlayLayout";
52
53    private int mActionBarHeight;
54    //private WindowDecorActionBar mActionBar;
55    private int mWindowVisibility = View.VISIBLE;
56
57    // The main UI elements that we handle the layout of.
58    private View mContent;
59    private ActionBarContainer mActionBarBottom;
60    private ActionBarContainer mActionBarTop;
61
62    // Some interior UI elements.
63    private DecorToolbar mDecorToolbar;
64
65    // Content overlay drawable - generally the action bar's shadow
66    private Drawable mWindowContentOverlay;
67    private boolean mIgnoreWindowContentOverlay;
68
69    private boolean mOverlayMode;
70    private boolean mHasNonEmbeddedTabs;
71    private boolean mHideOnContentScroll;
72    private boolean mAnimatingForFling;
73    private int mHideOnContentScrollReference;
74    private int mLastSystemUiVisibility;
75    private final Rect mBaseContentInsets = new Rect();
76    private final Rect mLastBaseContentInsets = new Rect();
77    private final Rect mContentInsets = new Rect();
78    private final Rect mBaseInnerInsets = new Rect();
79    private final Rect mInnerInsets = new Rect();
80    private final Rect mLastInnerInsets = new Rect();
81
82    private ActionBarVisibilityCallback mActionBarVisibilityCallback;
83
84    private final int ACTION_BAR_ANIMATE_DELAY = 600; // ms
85
86    private OverScroller mFlingEstimator;
87
88    private ViewPropertyAnimator mCurrentActionBarTopAnimator;
89    private ViewPropertyAnimator mCurrentActionBarBottomAnimator;
90
91    private final Animator.AnimatorListener mTopAnimatorListener = new AnimatorListenerAdapter() {
92        @Override
93        public void onAnimationEnd(Animator animation) {
94            mCurrentActionBarTopAnimator = null;
95            mAnimatingForFling = false;
96        }
97
98        @Override
99        public void onAnimationCancel(Animator animation) {
100            mCurrentActionBarTopAnimator = null;
101            mAnimatingForFling = false;
102        }
103    };
104
105    private final Animator.AnimatorListener mBottomAnimatorListener =
106            new AnimatorListenerAdapter() {
107        @Override
108        public void onAnimationEnd(Animator animation) {
109            mCurrentActionBarBottomAnimator = null;
110            mAnimatingForFling = false;
111        }
112
113        @Override
114        public void onAnimationCancel(Animator animation) {
115            mCurrentActionBarBottomAnimator = null;
116            mAnimatingForFling = false;
117        }
118    };
119
120    private final Runnable mRemoveActionBarHideOffset = new Runnable() {
121        public void run() {
122            haltActionBarHideOffsetAnimations();
123            mCurrentActionBarTopAnimator = mActionBarTop.animate().translationY(0)
124                    .setListener(mTopAnimatorListener);
125            if (mActionBarBottom != null && mActionBarBottom.getVisibility() != GONE) {
126                mCurrentActionBarBottomAnimator = mActionBarBottom.animate().translationY(0)
127                        .setListener(mBottomAnimatorListener);
128            }
129        }
130    };
131
132    private final Runnable mAddActionBarHideOffset = new Runnable() {
133        public void run() {
134            haltActionBarHideOffsetAnimations();
135            mCurrentActionBarTopAnimator = mActionBarTop.animate()
136                    .translationY(-mActionBarTop.getHeight())
137                    .setListener(mTopAnimatorListener);
138            if (mActionBarBottom != null && mActionBarBottom.getVisibility() != GONE) {
139                mCurrentActionBarBottomAnimator = mActionBarBottom.animate()
140                        .translationY(mActionBarBottom.getHeight())
141                        .setListener(mBottomAnimatorListener);
142            }
143        }
144    };
145
146    public static final Property<ActionBarOverlayLayout, Integer> ACTION_BAR_HIDE_OFFSET =
147            new IntProperty<ActionBarOverlayLayout>("actionBarHideOffset") {
148
149                @Override
150                public void setValue(ActionBarOverlayLayout object, int value) {
151                    object.setActionBarHideOffset(value);
152                }
153
154                @Override
155                public Integer get(ActionBarOverlayLayout object) {
156                    return object.getActionBarHideOffset();
157                }
158            };
159
160    static final int[] ATTRS = new int [] {
161            com.android.internal.R.attr.actionBarSize,
162            com.android.internal.R.attr.windowContentOverlay
163    };
164
165    public ActionBarOverlayLayout(Context context) {
166        super(context);
167        init(context);
168    }
169
170    public ActionBarOverlayLayout(Context context, AttributeSet attrs) {
171        super(context, attrs);
172        init(context);
173    }
174
175    private void init(Context context) {
176        TypedArray ta = getContext().getTheme().obtainStyledAttributes(ATTRS);
177        mActionBarHeight = ta.getDimensionPixelSize(0, 0);
178        mWindowContentOverlay = ta.getDrawable(1);
179        setWillNotDraw(mWindowContentOverlay == null);
180        ta.recycle();
181
182        mIgnoreWindowContentOverlay = context.getApplicationInfo().targetSdkVersion <
183                Build.VERSION_CODES.KITKAT;
184
185        mFlingEstimator = new OverScroller(context);
186    }
187
188    @Override
189    protected void onDetachedFromWindow() {
190        super.onDetachedFromWindow();
191        haltActionBarHideOffsetAnimations();
192    }
193
194    public void setActionBarVisibilityCallback(ActionBarVisibilityCallback cb) {
195        mActionBarVisibilityCallback = cb;
196        if (getWindowToken() != null) {
197            // This is being initialized after being added to a window;
198            // make sure to update all state now.
199            mActionBarVisibilityCallback.onWindowVisibilityChanged(mWindowVisibility);
200            if (mLastSystemUiVisibility != 0) {
201                int newVis = mLastSystemUiVisibility;
202                onWindowSystemUiVisibilityChanged(newVis);
203                requestApplyInsets();
204            }
205        }
206    }
207
208    public void setOverlayMode(boolean overlayMode) {
209        mOverlayMode = overlayMode;
210
211        /*
212         * Drawing the window content overlay was broken before K so starting to draw it
213         * again unexpectedly will cause artifacts in some apps. They should fix it.
214         */
215        mIgnoreWindowContentOverlay = overlayMode &&
216                getContext().getApplicationInfo().targetSdkVersion <
217                        Build.VERSION_CODES.KITKAT;
218    }
219
220    public boolean isInOverlayMode() {
221        return mOverlayMode;
222    }
223
224    public void setHasNonEmbeddedTabs(boolean hasNonEmbeddedTabs) {
225        mHasNonEmbeddedTabs = hasNonEmbeddedTabs;
226    }
227
228    public void setShowingForActionMode(boolean showing) {
229        if (showing) {
230            // Here's a fun hack: if the status bar is currently being hidden,
231            // and the application has asked for stable content insets, then
232            // we will end up with the action mode action bar being shown
233            // without the status bar, but moved below where the status bar
234            // would be.  Not nice.  Trying to have this be positioned
235            // correctly is not easy (basically we need yet *another* content
236            // inset from the window manager to know where to put it), so
237            // instead we will just temporarily force the status bar to be shown.
238            if ((getWindowSystemUiVisibility() & (SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
239                    | SYSTEM_UI_FLAG_LAYOUT_STABLE))
240                    == (SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | SYSTEM_UI_FLAG_LAYOUT_STABLE)) {
241                setDisabledSystemUiVisibility(SYSTEM_UI_FLAG_FULLSCREEN);
242            }
243        } else {
244            setDisabledSystemUiVisibility(0);
245        }
246    }
247
248    @Override
249    protected void onConfigurationChanged(Configuration newConfig) {
250        super.onConfigurationChanged(newConfig);
251        init(getContext());
252        requestApplyInsets();
253    }
254
255    @Override
256    public void onWindowSystemUiVisibilityChanged(int visible) {
257        super.onWindowSystemUiVisibilityChanged(visible);
258        pullChildren();
259        final int diff = mLastSystemUiVisibility ^ visible;
260        mLastSystemUiVisibility = visible;
261        final boolean barVisible = (visible & SYSTEM_UI_FLAG_FULLSCREEN) == 0;
262        final boolean stable = (visible & SYSTEM_UI_FLAG_LAYOUT_STABLE) != 0;
263        if (mActionBarVisibilityCallback != null) {
264            // We want the bar to be visible if it is not being hidden,
265            // or the app has not turned on a stable UI mode (meaning they
266            // are performing explicit layout around the action bar).
267            mActionBarVisibilityCallback.enableContentAnimations(!stable);
268            if (barVisible || !stable) mActionBarVisibilityCallback.showForSystem();
269            else mActionBarVisibilityCallback.hideForSystem();
270        }
271        if ((diff & SYSTEM_UI_FLAG_LAYOUT_STABLE) != 0) {
272            if (mActionBarVisibilityCallback != null) {
273                requestApplyInsets();
274            }
275        }
276    }
277
278    @Override
279    protected void onWindowVisibilityChanged(int visibility) {
280        super.onWindowVisibilityChanged(visibility);
281        mWindowVisibility = visibility;
282        if (mActionBarVisibilityCallback != null) {
283            mActionBarVisibilityCallback.onWindowVisibilityChanged(visibility);
284        }
285    }
286
287    private boolean applyInsets(View view, Rect insets, boolean left, boolean top,
288            boolean bottom, boolean right) {
289        boolean changed = false;
290        LayoutParams lp = (LayoutParams)view.getLayoutParams();
291        if (left && lp.leftMargin != insets.left) {
292            changed = true;
293            lp.leftMargin = insets.left;
294        }
295        if (top && lp.topMargin != insets.top) {
296            changed = true;
297            lp.topMargin = insets.top;
298        }
299        if (right && lp.rightMargin != insets.right) {
300            changed = true;
301            lp.rightMargin = insets.right;
302        }
303        if (bottom && lp.bottomMargin != insets.bottom) {
304            changed = true;
305            lp.bottomMargin = insets.bottom;
306        }
307        return changed;
308    }
309
310    @Override
311    public WindowInsets onApplyWindowInsets(WindowInsets insets) {
312        pullChildren();
313
314        final int vis = getWindowSystemUiVisibility();
315        final boolean stable = (vis & SYSTEM_UI_FLAG_LAYOUT_STABLE) != 0;
316        final Rect systemInsets = insets.getSystemWindowInsets();
317
318        // The top and bottom action bars are always within the content area.
319        boolean changed = applyInsets(mActionBarTop, systemInsets, true, true, false, true);
320        if (mActionBarBottom != null) {
321            changed |= applyInsets(mActionBarBottom, systemInsets, true, false, true, true);
322        }
323
324        mBaseInnerInsets.set(systemInsets);
325        computeFitSystemWindows(mBaseInnerInsets, mBaseContentInsets);
326        if (!mLastBaseContentInsets.equals(mBaseContentInsets)) {
327            changed = true;
328            mLastBaseContentInsets.set(mBaseContentInsets);
329        }
330
331        if (changed) {
332            requestLayout();
333        }
334
335        // We don't do any more at this point.  To correctly compute the content/inner
336        // insets in all cases, we need to know the measured size of the various action
337        // bar elements.  onApplyWindowInsets() happens before the measure pass, so we can't
338        // do that here.  Instead we will take this up in onMeasure().
339        return WindowInsets.CONSUMED;
340    }
341
342    @Override
343    protected LayoutParams generateDefaultLayoutParams() {
344        return new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
345    }
346
347    @Override
348    public LayoutParams generateLayoutParams(AttributeSet attrs) {
349        return new LayoutParams(getContext(), attrs);
350    }
351
352    @Override
353    protected ViewGroup.LayoutParams generateLayoutParams(ViewGroup.LayoutParams p) {
354        return new LayoutParams(p);
355    }
356
357    @Override
358    protected boolean checkLayoutParams(ViewGroup.LayoutParams p) {
359        return p instanceof LayoutParams;
360    }
361
362    @Override
363    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
364        pullChildren();
365
366        int maxHeight = 0;
367        int maxWidth = 0;
368        int childState = 0;
369
370        int topInset = 0;
371        int bottomInset = 0;
372
373        measureChildWithMargins(mActionBarTop, widthMeasureSpec, 0, heightMeasureSpec, 0);
374        LayoutParams lp = (LayoutParams) mActionBarTop.getLayoutParams();
375        maxWidth = Math.max(maxWidth,
376                mActionBarTop.getMeasuredWidth() + lp.leftMargin + lp.rightMargin);
377        maxHeight = Math.max(maxHeight,
378                mActionBarTop.getMeasuredHeight() + lp.topMargin + lp.bottomMargin);
379        childState = combineMeasuredStates(childState, mActionBarTop.getMeasuredState());
380
381        // xlarge screen layout doesn't have bottom action bar.
382        if (mActionBarBottom != null) {
383            measureChildWithMargins(mActionBarBottom, widthMeasureSpec, 0, heightMeasureSpec, 0);
384            lp = (LayoutParams) mActionBarBottom.getLayoutParams();
385            maxWidth = Math.max(maxWidth,
386                    mActionBarBottom.getMeasuredWidth() + lp.leftMargin + lp.rightMargin);
387            maxHeight = Math.max(maxHeight,
388                    mActionBarBottom.getMeasuredHeight() + lp.topMargin + lp.bottomMargin);
389            childState = combineMeasuredStates(childState, mActionBarBottom.getMeasuredState());
390        }
391
392        final int vis = getWindowSystemUiVisibility();
393        final boolean stable = (vis & SYSTEM_UI_FLAG_LAYOUT_STABLE) != 0;
394
395        if (stable) {
396            // This is the standard space needed for the action bar.  For stable measurement,
397            // we can't depend on the size currently reported by it -- this must remain constant.
398            topInset = mActionBarHeight;
399            if (mHasNonEmbeddedTabs) {
400                final View tabs = mActionBarTop.getTabContainer();
401                if (tabs != null) {
402                    // If tabs are not embedded, increase space on top to account for them.
403                    topInset += mActionBarHeight;
404                }
405            }
406        } else if (mActionBarTop.getVisibility() != GONE) {
407            // This is the space needed on top of the window for all of the action bar
408            // and tabs.
409            topInset = mActionBarTop.getMeasuredHeight();
410        }
411
412        if (mDecorToolbar.isSplit()) {
413            // If action bar is split, adjust bottom insets for it.
414            if (mActionBarBottom != null) {
415                if (stable) {
416                    bottomInset = mActionBarHeight;
417                } else {
418                    bottomInset = mActionBarBottom.getMeasuredHeight();
419                }
420            }
421        }
422
423        // If the window has not requested system UI layout flags, we need to
424        // make sure its content is not being covered by system UI...  though it
425        // will still be covered by the action bar if they have requested it to
426        // overlay.
427        mContentInsets.set(mBaseContentInsets);
428        mInnerInsets.set(mBaseInnerInsets);
429        if (!mOverlayMode && !stable) {
430            mContentInsets.top += topInset;
431            mContentInsets.bottom += bottomInset;
432        } else {
433            mInnerInsets.top += topInset;
434            mInnerInsets.bottom += bottomInset;
435        }
436        applyInsets(mContent, mContentInsets, true, true, true, true);
437
438        if (!mLastInnerInsets.equals(mInnerInsets)) {
439            // If the inner insets have changed, we need to dispatch this down to
440            // the app's fitSystemWindows().  We do this before measuring the content
441            // view to keep the same semantics as the normal fitSystemWindows() call.
442            mLastInnerInsets.set(mInnerInsets);
443            mContent.dispatchApplyWindowInsets(new WindowInsets(mInnerInsets));
444        }
445
446        measureChildWithMargins(mContent, widthMeasureSpec, 0, heightMeasureSpec, 0);
447        lp = (LayoutParams) mContent.getLayoutParams();
448        maxWidth = Math.max(maxWidth,
449                mContent.getMeasuredWidth() + lp.leftMargin + lp.rightMargin);
450        maxHeight = Math.max(maxHeight,
451                mContent.getMeasuredHeight() + lp.topMargin + lp.bottomMargin);
452        childState = combineMeasuredStates(childState, mContent.getMeasuredState());
453
454        // Account for padding too
455        maxWidth += getPaddingLeft() + getPaddingRight();
456        maxHeight += getPaddingTop() + getPaddingBottom();
457
458        // Check against our minimum height and width
459        maxHeight = Math.max(maxHeight, getSuggestedMinimumHeight());
460        maxWidth = Math.max(maxWidth, getSuggestedMinimumWidth());
461
462        setMeasuredDimension(resolveSizeAndState(maxWidth, widthMeasureSpec, childState),
463                resolveSizeAndState(maxHeight, heightMeasureSpec,
464                        childState << MEASURED_HEIGHT_STATE_SHIFT));
465    }
466
467    @Override
468    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
469        final int count = getChildCount();
470
471        final int parentLeft = getPaddingLeft();
472        final int parentRight = right - left - getPaddingRight();
473
474        final int parentTop = getPaddingTop();
475        final int parentBottom = bottom - top - getPaddingBottom();
476
477        for (int i = 0; i < count; i++) {
478            final View child = getChildAt(i);
479            if (child.getVisibility() != GONE) {
480                final LayoutParams lp = (LayoutParams) child.getLayoutParams();
481
482                final int width = child.getMeasuredWidth();
483                final int height = child.getMeasuredHeight();
484
485                int childLeft = parentLeft + lp.leftMargin;
486                int childTop;
487                if (child == mActionBarBottom) {
488                    childTop = parentBottom - height - lp.bottomMargin;
489                } else {
490                    childTop = parentTop + lp.topMargin;
491                }
492
493                child.layout(childLeft, childTop, childLeft + width, childTop + height);
494            }
495        }
496    }
497
498    @Override
499    public void draw(Canvas c) {
500        super.draw(c);
501        if (mWindowContentOverlay != null && !mIgnoreWindowContentOverlay) {
502            final int top = mActionBarTop.getVisibility() == VISIBLE ?
503                    (int) (mActionBarTop.getBottom() + mActionBarTop.getTranslationY() + 0.5f) : 0;
504            mWindowContentOverlay.setBounds(0, top, getWidth(),
505                    top + mWindowContentOverlay.getIntrinsicHeight());
506            mWindowContentOverlay.draw(c);
507        }
508    }
509
510    @Override
511    public boolean shouldDelayChildPressedState() {
512        return false;
513    }
514
515    @Override
516    public boolean onStartNestedScroll(View child, View target, int axes) {
517        if ((axes & SCROLL_AXIS_VERTICAL) == 0 || mActionBarTop.getVisibility() != VISIBLE) {
518            return false;
519        }
520        return mHideOnContentScroll;
521    }
522
523    @Override
524    public void onNestedScrollAccepted(View child, View target, int axes) {
525        super.onNestedScrollAccepted(child, target, axes);
526        mHideOnContentScrollReference = getActionBarHideOffset();
527        haltActionBarHideOffsetAnimations();
528        if (mActionBarVisibilityCallback != null) {
529            mActionBarVisibilityCallback.onContentScrollStarted();
530        }
531    }
532
533    @Override
534    public void onNestedScroll(View target, int dxConsumed, int dyConsumed,
535            int dxUnconsumed, int dyUnconsumed) {
536        mHideOnContentScrollReference += dyConsumed;
537        setActionBarHideOffset(mHideOnContentScrollReference);
538    }
539
540    @Override
541    public void onStopNestedScroll(View target) {
542        super.onStopNestedScroll(target);
543        if (mHideOnContentScroll && !mAnimatingForFling) {
544            if (mHideOnContentScrollReference <= mActionBarTop.getHeight()) {
545                postRemoveActionBarHideOffset();
546            } else {
547                postAddActionBarHideOffset();
548            }
549        }
550        if (mActionBarVisibilityCallback != null) {
551            mActionBarVisibilityCallback.onContentScrollStopped();
552        }
553    }
554
555    @Override
556    public boolean onNestedFling(View target, float velocityX, float velocityY, boolean consumed) {
557        if (!mHideOnContentScroll || !consumed) {
558            return false;
559        }
560        if (shouldHideActionBarOnFling(velocityX, velocityY)) {
561            addActionBarHideOffset();
562        } else {
563            removeActionBarHideOffset();
564        }
565        mAnimatingForFling = true;
566        return true;
567    }
568
569    void pullChildren() {
570        if (mContent == null) {
571            mContent = findViewById(com.android.internal.R.id.content);
572            mActionBarTop = (ActionBarContainer) findViewById(
573                    com.android.internal.R.id.action_bar_container);
574            mDecorToolbar = getDecorToolbar(findViewById(com.android.internal.R.id.action_bar));
575            mActionBarBottom = (ActionBarContainer) findViewById(
576                    com.android.internal.R.id.split_action_bar);
577        }
578    }
579
580    private DecorToolbar getDecorToolbar(View view) {
581        if (view instanceof DecorToolbar) {
582            return (DecorToolbar) view;
583        } else if (view instanceof Toolbar) {
584            return ((Toolbar) view).getWrapper();
585        } else {
586            throw new IllegalStateException("Can't make a decor toolbar out of " +
587                    view.getClass().getSimpleName());
588        }
589    }
590
591    public void setHideOnContentScrollEnabled(boolean hideOnContentScroll) {
592        if (hideOnContentScroll != mHideOnContentScroll) {
593            mHideOnContentScroll = hideOnContentScroll;
594            if (!hideOnContentScroll) {
595                stopNestedScroll();
596                haltActionBarHideOffsetAnimations();
597                setActionBarHideOffset(0);
598            }
599        }
600    }
601
602    public boolean isHideOnContentScrollEnabled() {
603        return mHideOnContentScroll;
604    }
605
606    public int getActionBarHideOffset() {
607        return mActionBarTop != null ? -((int) mActionBarTop.getTranslationY()) : 0;
608    }
609
610    public void setActionBarHideOffset(int offset) {
611        haltActionBarHideOffsetAnimations();
612        final int topHeight = mActionBarTop.getHeight();
613        offset = Math.max(0, Math.min(offset, topHeight));
614        mActionBarTop.setTranslationY(-offset);
615        if (mActionBarBottom != null && mActionBarBottom.getVisibility() != GONE) {
616            // Match the hide offset proportionally for a split bar
617            final float fOffset = (float) offset / topHeight;
618            final int bOffset = (int) (mActionBarBottom.getHeight() * fOffset);
619            mActionBarBottom.setTranslationY(bOffset);
620        }
621    }
622
623    private void haltActionBarHideOffsetAnimations() {
624        removeCallbacks(mRemoveActionBarHideOffset);
625        removeCallbacks(mAddActionBarHideOffset);
626        if (mCurrentActionBarTopAnimator != null) {
627            mCurrentActionBarTopAnimator.cancel();
628        }
629        if (mCurrentActionBarBottomAnimator != null) {
630            mCurrentActionBarBottomAnimator.cancel();
631        }
632    }
633
634    private void postRemoveActionBarHideOffset() {
635        haltActionBarHideOffsetAnimations();
636        postDelayed(mRemoveActionBarHideOffset, ACTION_BAR_ANIMATE_DELAY);
637    }
638
639    private void postAddActionBarHideOffset() {
640        haltActionBarHideOffsetAnimations();
641        postDelayed(mAddActionBarHideOffset, ACTION_BAR_ANIMATE_DELAY);
642    }
643
644    private void removeActionBarHideOffset() {
645        haltActionBarHideOffsetAnimations();
646        mRemoveActionBarHideOffset.run();
647    }
648
649    private void addActionBarHideOffset() {
650        haltActionBarHideOffsetAnimations();
651        mAddActionBarHideOffset.run();
652    }
653
654    private boolean shouldHideActionBarOnFling(float velocityX, float velocityY) {
655        mFlingEstimator.fling(0, 0, 0, (int) velocityY, 0, 0, Integer.MIN_VALUE, Integer.MAX_VALUE);
656        final int finalY = mFlingEstimator.getFinalY();
657        return finalY > mActionBarTop.getHeight();
658    }
659
660    @Override
661    public void setWindowCallback(Window.Callback cb) {
662        pullChildren();
663        mDecorToolbar.setWindowCallback(cb);
664    }
665
666    @Override
667    public void setWindowTitle(CharSequence title) {
668        pullChildren();
669        mDecorToolbar.setWindowTitle(title);
670    }
671
672    @Override
673    public CharSequence getTitle() {
674        pullChildren();
675        return mDecorToolbar.getTitle();
676    }
677
678    @Override
679    public void initFeature(int windowFeature) {
680        pullChildren();
681        switch (windowFeature) {
682            case Window.FEATURE_PROGRESS:
683                mDecorToolbar.initProgress();
684                break;
685            case Window.FEATURE_INDETERMINATE_PROGRESS:
686                mDecorToolbar.initIndeterminateProgress();
687                break;
688            case Window.FEATURE_ACTION_BAR_OVERLAY:
689                setOverlayMode(true);
690                break;
691        }
692    }
693
694    @Override
695    public void setUiOptions(int uiOptions) {
696        boolean splitActionBar = false;
697        final boolean splitWhenNarrow =
698                (uiOptions & ActivityInfo.UIOPTION_SPLIT_ACTION_BAR_WHEN_NARROW) != 0;
699        if (splitWhenNarrow) {
700            splitActionBar = getContext().getResources().getBoolean(
701                    com.android.internal.R.bool.split_action_bar_is_narrow);
702        }
703        if (splitActionBar) {
704            pullChildren();
705            if (mActionBarBottom != null && mDecorToolbar.canSplit()) {
706                mDecorToolbar.setSplitView(mActionBarBottom);
707                mDecorToolbar.setSplitToolbar(splitActionBar);
708                mDecorToolbar.setSplitWhenNarrow(splitWhenNarrow);
709
710                final ActionBarContextView cab = (ActionBarContextView) findViewById(
711                        com.android.internal.R.id.action_context_bar);
712                cab.setSplitView(mActionBarBottom);
713                cab.setSplitToolbar(splitActionBar);
714                cab.setSplitWhenNarrow(splitWhenNarrow);
715            } else if (splitActionBar) {
716                Log.e(TAG, "Requested split action bar with " +
717                        "incompatible window decor! Ignoring request.");
718            }
719        }
720    }
721
722    @Override
723    public boolean hasIcon() {
724        pullChildren();
725        return mDecorToolbar.hasIcon();
726    }
727
728    @Override
729    public boolean hasLogo() {
730        pullChildren();
731        return mDecorToolbar.hasLogo();
732    }
733
734    @Override
735    public void setIcon(int resId) {
736        pullChildren();
737        mDecorToolbar.setIcon(resId);
738    }
739
740    @Override
741    public void setIcon(Drawable d) {
742        pullChildren();
743        mDecorToolbar.setIcon(d);
744    }
745
746    @Override
747    public void setLogo(int resId) {
748        pullChildren();
749        mDecorToolbar.setLogo(resId);
750    }
751
752    @Override
753    public boolean canShowOverflowMenu() {
754        pullChildren();
755        return mDecorToolbar.canShowOverflowMenu();
756    }
757
758    @Override
759    public boolean isOverflowMenuShowing() {
760        pullChildren();
761        return mDecorToolbar.isOverflowMenuShowing();
762    }
763
764    @Override
765    public boolean isOverflowMenuShowPending() {
766        pullChildren();
767        return mDecorToolbar.isOverflowMenuShowPending();
768    }
769
770    @Override
771    public boolean showOverflowMenu() {
772        pullChildren();
773        return mDecorToolbar.showOverflowMenu();
774    }
775
776    @Override
777    public boolean hideOverflowMenu() {
778        pullChildren();
779        return mDecorToolbar.hideOverflowMenu();
780    }
781
782    @Override
783    public void setMenuPrepared() {
784        pullChildren();
785        mDecorToolbar.setMenuPrepared();
786    }
787
788    @Override
789    public void setMenu(Menu menu, MenuPresenter.Callback cb) {
790        pullChildren();
791        mDecorToolbar.setMenu(menu, cb);
792    }
793
794    @Override
795    public void saveToolbarHierarchyState(SparseArray<Parcelable> toolbarStates) {
796        pullChildren();
797        mDecorToolbar.saveHierarchyState(toolbarStates);
798    }
799
800    @Override
801    public void restoreToolbarHierarchyState(SparseArray<Parcelable> toolbarStates) {
802        pullChildren();
803        mDecorToolbar.restoreHierarchyState(toolbarStates);
804    }
805
806    @Override
807    public void dismissPopups() {
808        pullChildren();
809        mDecorToolbar.dismissPopupMenus();
810    }
811
812    public static class LayoutParams extends MarginLayoutParams {
813        public LayoutParams(Context c, AttributeSet attrs) {
814            super(c, attrs);
815        }
816
817        public LayoutParams(int width, int height) {
818            super(width, height);
819        }
820
821        public LayoutParams(ViewGroup.LayoutParams source) {
822            super(source);
823        }
824
825        public LayoutParams(ViewGroup.MarginLayoutParams source) {
826            super(source);
827        }
828    }
829
830    public interface ActionBarVisibilityCallback {
831        void onWindowVisibilityChanged(int visibility);
832        void showForSystem();
833        void hideForSystem();
834        void enableContentAnimations(boolean enable);
835        void onContentScrollStarted();
836        void onContentScrollStopped();
837    }
838}
839