WindowDecorActionBar.java revision 3abf5c4bd167547b7e995f1b14ae1bae210c5fec 
1/*
2 * Copyright (C) 2010 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.app;
18
19import android.animation.ValueAnimator;
20import android.content.res.TypedArray;
21import android.view.ViewParent;
22import android.widget.Toolbar;
23import com.android.internal.R;
24import com.android.internal.view.ActionBarPolicy;
25import com.android.internal.view.menu.MenuBuilder;
26import com.android.internal.view.menu.MenuPopupHelper;
27import com.android.internal.view.menu.SubMenuBuilder;
28import com.android.internal.widget.ActionBarContainer;
29import com.android.internal.widget.ActionBarContextView;
30import com.android.internal.widget.ActionBarOverlayLayout;
31import com.android.internal.widget.DecorToolbar;
32import com.android.internal.widget.ScrollingTabContainerView;
33
34import android.animation.Animator;
35import android.animation.Animator.AnimatorListener;
36import android.animation.AnimatorListenerAdapter;
37import android.animation.AnimatorSet;
38import android.animation.ObjectAnimator;
39import android.app.ActionBar;
40import android.app.Activity;
41import android.app.Dialog;
42import android.app.FragmentTransaction;
43import android.content.Context;
44import android.content.res.Configuration;
45import android.content.res.Resources;
46import android.graphics.drawable.Drawable;
47import android.util.TypedValue;
48import android.view.ActionMode;
49import android.view.ContextThemeWrapper;
50import android.view.LayoutInflater;
51import android.view.Menu;
52import android.view.MenuInflater;
53import android.view.MenuItem;
54import android.view.View;
55import android.view.Window;
56import android.view.accessibility.AccessibilityEvent;
57import android.view.animation.AnimationUtils;
58import android.widget.SpinnerAdapter;
59
60import java.lang.ref.WeakReference;
61import java.util.ArrayList;
62
63/**
64 * WindowDecorActionBar is the ActionBar implementation used
65 * by devices of all screen sizes as part of the window decor layout.
66 * If it detects a compatible decor, it will split contextual modes
67 * across both the ActionBarView at the top of the screen and
68 * a horizontal LinearLayout at the bottom which is normally hidden.
69 */
70public class WindowDecorActionBar extends ActionBar implements
71        ActionBarOverlayLayout.ActionBarVisibilityCallback {
72    private static final String TAG = "WindowDecorActionBar";
73
74    private Context mContext;
75    private Context mThemedContext;
76    private Activity mActivity;
77    private Dialog mDialog;
78
79    private ActionBarOverlayLayout mOverlayLayout;
80    private ActionBarContainer mContainerView;
81    private DecorToolbar mDecorToolbar;
82    private ActionBarContextView mContextView;
83    private ActionBarContainer mSplitView;
84    private View mContentView;
85    private ScrollingTabContainerView mTabScrollView;
86
87    private ArrayList<TabImpl> mTabs = new ArrayList<TabImpl>();
88
89    private TabImpl mSelectedTab;
90    private int mSavedTabPosition = INVALID_POSITION;
91
92    private boolean mDisplayHomeAsUpSet;
93
94    ActionModeImpl mActionMode;
95    ActionMode mDeferredDestroyActionMode;
96    ActionMode.Callback mDeferredModeDestroyCallback;
97
98    private boolean mLastMenuVisibility;
99    private ArrayList<OnMenuVisibilityListener> mMenuVisibilityListeners =
100            new ArrayList<OnMenuVisibilityListener>();
101
102    private static final int CONTEXT_DISPLAY_NORMAL = 0;
103    private static final int CONTEXT_DISPLAY_SPLIT = 1;
104
105    private static final int INVALID_POSITION = -1;
106
107    private int mContextDisplayMode;
108    private boolean mHasEmbeddedTabs;
109
110    private int mCurWindowVisibility = View.VISIBLE;
111
112    private boolean mContentAnimations = true;
113    private boolean mHiddenByApp;
114    private boolean mHiddenBySystem;
115    private boolean mShowingForMode;
116
117    private boolean mNowShowing = true;
118
119    private Animator mCurrentShowAnim;
120    private boolean mShowHideAnimationEnabled;
121    boolean mHideOnContentScroll;
122
123    final AnimatorListener mHideListener = new AnimatorListenerAdapter() {
124        @Override
125        public void onAnimationEnd(Animator animation) {
126            if (mContentAnimations && mContentView != null) {
127                mContentView.setTranslationY(0);
128                mContainerView.setTranslationY(0);
129            }
130            if (mSplitView != null && mContextDisplayMode == CONTEXT_DISPLAY_SPLIT) {
131                mSplitView.setVisibility(View.GONE);
132            }
133            mContainerView.setVisibility(View.GONE);
134            mContainerView.setTransitioning(false);
135            mCurrentShowAnim = null;
136            completeDeferredDestroyActionMode();
137            if (mOverlayLayout != null) {
138                mOverlayLayout.requestApplyInsets();
139            }
140        }
141    };
142
143    final AnimatorListener mShowListener = new AnimatorListenerAdapter() {
144        @Override
145        public void onAnimationEnd(Animator animation) {
146            mCurrentShowAnim = null;
147            mContainerView.requestLayout();
148        }
149    };
150
151    final ValueAnimator.AnimatorUpdateListener mUpdateListener =
152            new ValueAnimator.AnimatorUpdateListener() {
153        @Override
154        public void onAnimationUpdate(ValueAnimator animation) {
155            final ViewParent parent = mContainerView.getParent();
156            ((View) parent).invalidate();
157        }
158    };
159
160    public WindowDecorActionBar(Activity activity) {
161        mActivity = activity;
162        Window window = activity.getWindow();
163        View decor = window.getDecorView();
164        boolean overlayMode = mActivity.getWindow().hasFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
165        init(decor);
166        if (!overlayMode) {
167            mContentView = decor.findViewById(android.R.id.content);
168        }
169    }
170
171    public WindowDecorActionBar(Dialog dialog) {
172        mDialog = dialog;
173        init(dialog.getWindow().getDecorView());
174    }
175
176    /**
177     * Only for edit mode.
178     * @hide
179     */
180    public WindowDecorActionBar(View layout) {
181        assert layout.isInEditMode();
182        init(layout);
183    }
184
185    private void init(View decor) {
186        mOverlayLayout = (ActionBarOverlayLayout) decor.findViewById(
187                com.android.internal.R.id.decor_content_parent);
188        if (mOverlayLayout != null) {
189            mOverlayLayout.setActionBarVisibilityCallback(this);
190        }
191        mDecorToolbar = getDecorToolbar(decor.findViewById(com.android.internal.R.id.action_bar));
192        mContextView = (ActionBarContextView) decor.findViewById(
193                com.android.internal.R.id.action_context_bar);
194        mContainerView = (ActionBarContainer) decor.findViewById(
195                com.android.internal.R.id.action_bar_container);
196        mSplitView = (ActionBarContainer) decor.findViewById(
197                com.android.internal.R.id.split_action_bar);
198
199        if (mDecorToolbar == null || mContextView == null || mContainerView == null) {
200            throw new IllegalStateException(getClass().getSimpleName() + " can only be used " +
201                    "with a compatible window decor layout");
202        }
203
204        mContext = mDecorToolbar.getContext();
205        mContextDisplayMode = mDecorToolbar.isSplit() ?
206                CONTEXT_DISPLAY_SPLIT : CONTEXT_DISPLAY_NORMAL;
207
208        // This was initially read from the action bar style
209        final int current = mDecorToolbar.getDisplayOptions();
210        final boolean homeAsUp = (current & DISPLAY_HOME_AS_UP) != 0;
211        if (homeAsUp) {
212            mDisplayHomeAsUpSet = true;
213        }
214
215        ActionBarPolicy abp = ActionBarPolicy.get(mContext);
216        setHomeButtonEnabled(abp.enableHomeButtonByDefault() || homeAsUp);
217        setHasEmbeddedTabs(abp.hasEmbeddedTabs());
218
219        final TypedArray a = mContext.obtainStyledAttributes(null,
220                com.android.internal.R.styleable.ActionBar,
221                com.android.internal.R.attr.actionBarStyle, 0);
222        if (a.getBoolean(R.styleable.ActionBar_hideOnContentScroll, false)) {
223            setHideOnContentScrollEnabled(true);
224        }
225        final int elevation = a.getDimensionPixelSize(R.styleable.ActionBar_elevation, 0);
226        if (elevation != 0) {
227            setElevation(elevation);
228        }
229        a.recycle();
230    }
231
232    private DecorToolbar getDecorToolbar(View view) {
233        if (view instanceof DecorToolbar) {
234            return (DecorToolbar) view;
235        } else if (view instanceof Toolbar) {
236            return ((Toolbar) view).getWrapper();
237        } else {
238            throw new IllegalStateException("Can't make a decor toolbar out of " +
239                    view.getClass().getSimpleName());
240        }
241    }
242
243    @Override
244    public void setElevation(float elevation) {
245        mContainerView.setElevation(elevation);
246        if (mSplitView != null) {
247            mSplitView.setElevation(elevation);
248        }
249    }
250
251    @Override
252    public float getElevation() {
253        return mContainerView.getElevation();
254    }
255
256    public void onConfigurationChanged(Configuration newConfig) {
257        setHasEmbeddedTabs(ActionBarPolicy.get(mContext).hasEmbeddedTabs());
258    }
259
260    private void setHasEmbeddedTabs(boolean hasEmbeddedTabs) {
261        mHasEmbeddedTabs = hasEmbeddedTabs;
262        // Switch tab layout configuration if needed
263        if (!mHasEmbeddedTabs) {
264            mDecorToolbar.setEmbeddedTabView(null);
265            mContainerView.setTabContainer(mTabScrollView);
266        } else {
267            mContainerView.setTabContainer(null);
268            mDecorToolbar.setEmbeddedTabView(mTabScrollView);
269        }
270        final boolean isInTabMode = getNavigationMode() == NAVIGATION_MODE_TABS;
271        if (mTabScrollView != null) {
272            if (isInTabMode) {
273                mTabScrollView.setVisibility(View.VISIBLE);
274                if (mOverlayLayout != null) {
275                    mOverlayLayout.requestApplyInsets();
276                }
277            } else {
278                mTabScrollView.setVisibility(View.GONE);
279            }
280        }
281        mDecorToolbar.setCollapsible(!mHasEmbeddedTabs && isInTabMode);
282        mOverlayLayout.setHasNonEmbeddedTabs(!mHasEmbeddedTabs && isInTabMode);
283    }
284
285    private void ensureTabsExist() {
286        if (mTabScrollView != null) {
287            return;
288        }
289
290        ScrollingTabContainerView tabScroller = new ScrollingTabContainerView(mContext);
291
292        if (mHasEmbeddedTabs) {
293            tabScroller.setVisibility(View.VISIBLE);
294            mDecorToolbar.setEmbeddedTabView(tabScroller);
295        } else {
296            if (getNavigationMode() == NAVIGATION_MODE_TABS) {
297                tabScroller.setVisibility(View.VISIBLE);
298                if (mOverlayLayout != null) {
299                    mOverlayLayout.requestApplyInsets();
300                }
301            } else {
302                tabScroller.setVisibility(View.GONE);
303            }
304            mContainerView.setTabContainer(tabScroller);
305        }
306        mTabScrollView = tabScroller;
307    }
308
309    void completeDeferredDestroyActionMode() {
310        if (mDeferredModeDestroyCallback != null) {
311            mDeferredModeDestroyCallback.onDestroyActionMode(mDeferredDestroyActionMode);
312            mDeferredDestroyActionMode = null;
313            mDeferredModeDestroyCallback = null;
314        }
315    }
316
317    public void onWindowVisibilityChanged(int visibility) {
318        mCurWindowVisibility = visibility;
319    }
320
321    /**
322     * Enables or disables animation between show/hide states.
323     * If animation is disabled using this method, animations in progress
324     * will be finished.
325     *
326     * @param enabled true to animate, false to not animate.
327     */
328    public void setShowHideAnimationEnabled(boolean enabled) {
329        mShowHideAnimationEnabled = enabled;
330        if (!enabled && mCurrentShowAnim != null) {
331            mCurrentShowAnim.end();
332        }
333    }
334
335    public void addOnMenuVisibilityListener(OnMenuVisibilityListener listener) {
336        mMenuVisibilityListeners.add(listener);
337    }
338
339    public void removeOnMenuVisibilityListener(OnMenuVisibilityListener listener) {
340        mMenuVisibilityListeners.remove(listener);
341    }
342
343    public void dispatchMenuVisibilityChanged(boolean isVisible) {
344        if (isVisible == mLastMenuVisibility) {
345            return;
346        }
347        mLastMenuVisibility = isVisible;
348
349        final int count = mMenuVisibilityListeners.size();
350        for (int i = 0; i < count; i++) {
351            mMenuVisibilityListeners.get(i).onMenuVisibilityChanged(isVisible);
352        }
353    }
354
355    @Override
356    public void setCustomView(int resId) {
357        setCustomView(LayoutInflater.from(getThemedContext()).inflate(resId,
358                mDecorToolbar.getViewGroup(), false));
359    }
360
361    @Override
362    public void setDisplayUseLogoEnabled(boolean useLogo) {
363        setDisplayOptions(useLogo ? DISPLAY_USE_LOGO : 0, DISPLAY_USE_LOGO);
364    }
365
366    @Override
367    public void setDisplayShowHomeEnabled(boolean showHome) {
368        setDisplayOptions(showHome ? DISPLAY_SHOW_HOME : 0, DISPLAY_SHOW_HOME);
369    }
370
371    @Override
372    public void setDisplayHomeAsUpEnabled(boolean showHomeAsUp) {
373        setDisplayOptions(showHomeAsUp ? DISPLAY_HOME_AS_UP : 0, DISPLAY_HOME_AS_UP);
374    }
375
376    @Override
377    public void setDisplayShowTitleEnabled(boolean showTitle) {
378        setDisplayOptions(showTitle ? DISPLAY_SHOW_TITLE : 0, DISPLAY_SHOW_TITLE);
379    }
380
381    @Override
382    public void setDisplayShowCustomEnabled(boolean showCustom) {
383        setDisplayOptions(showCustom ? DISPLAY_SHOW_CUSTOM : 0, DISPLAY_SHOW_CUSTOM);
384    }
385
386    @Override
387    public void setHomeButtonEnabled(boolean enable) {
388        mDecorToolbar.setHomeButtonEnabled(enable);
389    }
390
391    @Override
392    public void setTitle(int resId) {
393        setTitle(mContext.getString(resId));
394    }
395
396    @Override
397    public void setSubtitle(int resId) {
398        setSubtitle(mContext.getString(resId));
399    }
400
401    public void setSelectedNavigationItem(int position) {
402        switch (mDecorToolbar.getNavigationMode()) {
403        case NAVIGATION_MODE_TABS:
404            selectTab(mTabs.get(position));
405            break;
406        case NAVIGATION_MODE_LIST:
407            mDecorToolbar.setDropdownSelectedPosition(position);
408            break;
409        default:
410            throw new IllegalStateException(
411                    "setSelectedNavigationIndex not valid for current navigation mode");
412        }
413    }
414
415    public void removeAllTabs() {
416        cleanupTabs();
417    }
418
419    private void cleanupTabs() {
420        if (mSelectedTab != null) {
421            selectTab(null);
422        }
423        mTabs.clear();
424        if (mTabScrollView != null) {
425            mTabScrollView.removeAllTabs();
426        }
427        mSavedTabPosition = INVALID_POSITION;
428    }
429
430    public void setTitle(CharSequence title) {
431        mDecorToolbar.setTitle(title);
432    }
433
434    @Override
435    public void setWindowTitle(CharSequence title) {
436        mDecorToolbar.setWindowTitle(title);
437    }
438
439    public void setSubtitle(CharSequence subtitle) {
440        mDecorToolbar.setSubtitle(subtitle);
441    }
442
443    public void setDisplayOptions(int options) {
444        if ((options & DISPLAY_HOME_AS_UP) != 0) {
445            mDisplayHomeAsUpSet = true;
446        }
447        mDecorToolbar.setDisplayOptions(options);
448    }
449
450    public void setDisplayOptions(int options, int mask) {
451        final int current = mDecorToolbar.getDisplayOptions();
452        if ((mask & DISPLAY_HOME_AS_UP) != 0) {
453            mDisplayHomeAsUpSet = true;
454        }
455        mDecorToolbar.setDisplayOptions((options & mask) | (current & ~mask));
456    }
457
458    public void setBackgroundDrawable(Drawable d) {
459        mContainerView.setPrimaryBackground(d);
460    }
461
462    public void setStackedBackgroundDrawable(Drawable d) {
463        mContainerView.setStackedBackground(d);
464    }
465
466    public void setSplitBackgroundDrawable(Drawable d) {
467        if (mSplitView != null) {
468            mSplitView.setSplitBackground(d);
469        }
470    }
471
472    public View getCustomView() {
473        return mDecorToolbar.getCustomView();
474    }
475
476    public CharSequence getTitle() {
477        return mDecorToolbar.getTitle();
478    }
479
480    public CharSequence getSubtitle() {
481        return mDecorToolbar.getSubtitle();
482    }
483
484    public int getNavigationMode() {
485        return mDecorToolbar.getNavigationMode();
486    }
487
488    public int getDisplayOptions() {
489        return mDecorToolbar.getDisplayOptions();
490    }
491
492    public ActionMode startActionMode(ActionMode.Callback callback) {
493        if (mActionMode != null) {
494            mActionMode.finish();
495        }
496
497        mOverlayLayout.setHideOnContentScrollEnabled(false);
498        mContextView.killMode();
499        ActionModeImpl mode = new ActionModeImpl(mContextView.getContext(), callback);
500        if (mode.dispatchOnCreate()) {
501            mode.invalidate();
502            mContextView.initForMode(mode);
503            animateToMode(true);
504            if (mSplitView != null && mContextDisplayMode == CONTEXT_DISPLAY_SPLIT) {
505                // TODO animate this
506                if (mSplitView.getVisibility() != View.VISIBLE) {
507                    mSplitView.setVisibility(View.VISIBLE);
508                    if (mOverlayLayout != null) {
509                        mOverlayLayout.requestApplyInsets();
510                    }
511                }
512            }
513            mContextView.sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED);
514            mActionMode = mode;
515            return mode;
516        }
517        return null;
518    }
519
520    private void configureTab(Tab tab, int position) {
521        final TabImpl tabi = (TabImpl) tab;
522        final ActionBar.TabListener callback = tabi.getCallback();
523
524        if (callback == null) {
525            throw new IllegalStateException("Action Bar Tab must have a Callback");
526        }
527
528        tabi.setPosition(position);
529        mTabs.add(position, tabi);
530
531        final int count = mTabs.size();
532        for (int i = position + 1; i < count; i++) {
533            mTabs.get(i).setPosition(i);
534        }
535    }
536
537    @Override
538    public void addTab(Tab tab) {
539        addTab(tab, mTabs.isEmpty());
540    }
541
542    @Override
543    public void addTab(Tab tab, int position) {
544        addTab(tab, position, mTabs.isEmpty());
545    }
546
547    @Override
548    public void addTab(Tab tab, boolean setSelected) {
549        ensureTabsExist();
550        mTabScrollView.addTab(tab, setSelected);
551        configureTab(tab, mTabs.size());
552        if (setSelected) {
553            selectTab(tab);
554        }
555    }
556
557    @Override
558    public void addTab(Tab tab, int position, boolean setSelected) {
559        ensureTabsExist();
560        mTabScrollView.addTab(tab, position, setSelected);
561        configureTab(tab, position);
562        if (setSelected) {
563            selectTab(tab);
564        }
565    }
566
567    @Override
568    public Tab newTab() {
569        return new TabImpl();
570    }
571
572    @Override
573    public void removeTab(Tab tab) {
574        removeTabAt(tab.getPosition());
575    }
576
577    @Override
578    public void removeTabAt(int position) {
579        if (mTabScrollView == null) {
580            // No tabs around to remove
581            return;
582        }
583
584        int selectedTabPosition = mSelectedTab != null
585                ? mSelectedTab.getPosition() : mSavedTabPosition;
586        mTabScrollView.removeTabAt(position);
587        TabImpl removedTab = mTabs.remove(position);
588        if (removedTab != null) {
589            removedTab.setPosition(-1);
590        }
591
592        final int newTabCount = mTabs.size();
593        for (int i = position; i < newTabCount; i++) {
594            mTabs.get(i).setPosition(i);
595        }
596
597        if (selectedTabPosition == position) {
598            selectTab(mTabs.isEmpty() ? null : mTabs.get(Math.max(0, position - 1)));
599        }
600    }
601
602    @Override
603    public void selectTab(Tab tab) {
604        if (getNavigationMode() != NAVIGATION_MODE_TABS) {
605            mSavedTabPosition = tab != null ? tab.getPosition() : INVALID_POSITION;
606            return;
607        }
608
609        final FragmentTransaction trans = mDecorToolbar.getViewGroup().isInEditMode() ? null :
610                mActivity.getFragmentManager().beginTransaction().disallowAddToBackStack();
611
612        if (mSelectedTab == tab) {
613            if (mSelectedTab != null) {
614                mSelectedTab.getCallback().onTabReselected(mSelectedTab, trans);
615                mTabScrollView.animateToTab(tab.getPosition());
616            }
617        } else {
618            mTabScrollView.setTabSelected(tab != null ? tab.getPosition() : Tab.INVALID_POSITION);
619            if (mSelectedTab != null) {
620                mSelectedTab.getCallback().onTabUnselected(mSelectedTab, trans);
621            }
622            mSelectedTab = (TabImpl) tab;
623            if (mSelectedTab != null) {
624                mSelectedTab.getCallback().onTabSelected(mSelectedTab, trans);
625            }
626        }
627
628        if (trans != null && !trans.isEmpty()) {
629            trans.commit();
630        }
631    }
632
633    @Override
634    public Tab getSelectedTab() {
635        return mSelectedTab;
636    }
637
638    @Override
639    public int getHeight() {
640        return mContainerView.getHeight();
641    }
642
643    public void enableContentAnimations(boolean enabled) {
644        mContentAnimations = enabled;
645    }
646
647    @Override
648    public void show() {
649        if (mHiddenByApp) {
650            mHiddenByApp = false;
651            updateVisibility(false);
652        }
653    }
654
655    private void showForActionMode() {
656        if (!mShowingForMode) {
657            mShowingForMode = true;
658            if (mOverlayLayout != null) {
659                mOverlayLayout.setShowingForActionMode(true);
660            }
661            updateVisibility(false);
662        }
663    }
664
665    public void showForSystem() {
666        if (mHiddenBySystem) {
667            mHiddenBySystem = false;
668            updateVisibility(true);
669        }
670    }
671
672    @Override
673    public void hide() {
674        if (!mHiddenByApp) {
675            mHiddenByApp = true;
676            updateVisibility(false);
677        }
678    }
679
680    private void hideForActionMode() {
681        if (mShowingForMode) {
682            mShowingForMode = false;
683            if (mOverlayLayout != null) {
684                mOverlayLayout.setShowingForActionMode(false);
685            }
686            updateVisibility(false);
687        }
688    }
689
690    public void hideForSystem() {
691        if (!mHiddenBySystem) {
692            mHiddenBySystem = true;
693            updateVisibility(true);
694        }
695    }
696
697    @Override
698    public void setHideOnContentScrollEnabled(boolean hideOnContentScroll) {
699        if (hideOnContentScroll && !mOverlayLayout.isInOverlayMode()) {
700            throw new IllegalStateException("Action bar must be in overlay mode " +
701                    "(Window.FEATURE_OVERLAY_ACTION_BAR) to enable hide on content scroll");
702        }
703        mHideOnContentScroll = hideOnContentScroll;
704        mOverlayLayout.setHideOnContentScrollEnabled(hideOnContentScroll);
705    }
706
707    @Override
708    public boolean isHideOnContentScrollEnabled() {
709        return mOverlayLayout.isHideOnContentScrollEnabled();
710    }
711
712    @Override
713    public int getHideOffset() {
714        return mOverlayLayout.getActionBarHideOffset();
715    }
716
717    @Override
718    public void setHideOffset(int offset) {
719        if (offset != 0 && !mOverlayLayout.isInOverlayMode()) {
720            throw new IllegalStateException("Action bar must be in overlay mode " +
721                    "(Window.FEATURE_OVERLAY_ACTION_BAR) to set a non-zero hide offset");
722        }
723        mOverlayLayout.setActionBarHideOffset(offset);
724    }
725
726    private static boolean checkShowingFlags(boolean hiddenByApp, boolean hiddenBySystem,
727            boolean showingForMode) {
728        if (showingForMode) {
729            return true;
730        } else if (hiddenByApp || hiddenBySystem) {
731            return false;
732        } else {
733            return true;
734        }
735    }
736
737    private void updateVisibility(boolean fromSystem) {
738        // Based on the current state, should we be hidden or shown?
739        final boolean shown = checkShowingFlags(mHiddenByApp, mHiddenBySystem,
740                mShowingForMode);
741
742        if (shown) {
743            if (!mNowShowing) {
744                mNowShowing = true;
745                doShow(fromSystem);
746            }
747        } else {
748            if (mNowShowing) {
749                mNowShowing = false;
750                doHide(fromSystem);
751            }
752        }
753    }
754
755    public void doShow(boolean fromSystem) {
756        if (mCurrentShowAnim != null) {
757            mCurrentShowAnim.end();
758        }
759        mContainerView.setVisibility(View.VISIBLE);
760
761        if (mCurWindowVisibility == View.VISIBLE && (mShowHideAnimationEnabled
762                || fromSystem)) {
763            mContainerView.setTranslationY(0); // because we're about to ask its window loc
764            float startingY = -mContainerView.getHeight();
765            if (fromSystem) {
766                int topLeft[] = {0, 0};
767                mContainerView.getLocationInWindow(topLeft);
768                startingY -= topLeft[1];
769            }
770            mContainerView.setTranslationY(startingY);
771            AnimatorSet anim = new AnimatorSet();
772            ObjectAnimator a = ObjectAnimator.ofFloat(mContainerView, View.TRANSLATION_Y, 0);
773            a.addUpdateListener(mUpdateListener);
774            AnimatorSet.Builder b = anim.play(a);
775            if (mContentAnimations && mContentView != null) {
776                b.with(ObjectAnimator.ofFloat(mContentView, View.TRANSLATION_Y,
777                        startingY, 0));
778            }
779            if (mSplitView != null && mContextDisplayMode == CONTEXT_DISPLAY_SPLIT) {
780                mSplitView.setTranslationY(mSplitView.getHeight());
781                mSplitView.setVisibility(View.VISIBLE);
782                b.with(ObjectAnimator.ofFloat(mSplitView, View.TRANSLATION_Y, 0));
783            }
784            anim.setInterpolator(AnimationUtils.loadInterpolator(mContext,
785                    com.android.internal.R.interpolator.decelerate_cubic));
786            anim.setDuration(250);
787            // If this is being shown from the system, add a small delay.
788            // This is because we will also be animating in the status bar,
789            // and these two elements can't be done in lock-step.  So we give
790            // a little time for the status bar to start its animation before
791            // the action bar animates.  (This corresponds to the corresponding
792            // case when hiding, where the status bar has a small delay before
793            // starting.)
794            anim.addListener(mShowListener);
795            mCurrentShowAnim = anim;
796            anim.start();
797        } else {
798            mContainerView.setAlpha(1);
799            mContainerView.setTranslationY(0);
800            if (mContentAnimations && mContentView != null) {
801                mContentView.setTranslationY(0);
802            }
803            if (mSplitView != null && mContextDisplayMode == CONTEXT_DISPLAY_SPLIT) {
804                mSplitView.setAlpha(1);
805                mSplitView.setTranslationY(0);
806                mSplitView.setVisibility(View.VISIBLE);
807            }
808            mShowListener.onAnimationEnd(null);
809        }
810        if (mOverlayLayout != null) {
811            mOverlayLayout.requestApplyInsets();
812        }
813    }
814
815    public void doHide(boolean fromSystem) {
816        if (mCurrentShowAnim != null) {
817            mCurrentShowAnim.end();
818        }
819
820        if (mCurWindowVisibility == View.VISIBLE && (mShowHideAnimationEnabled
821                || fromSystem)) {
822            mContainerView.setAlpha(1);
823            mContainerView.setTransitioning(true);
824            AnimatorSet anim = new AnimatorSet();
825            float endingY = -mContainerView.getHeight();
826            if (fromSystem) {
827                int topLeft[] = {0, 0};
828                mContainerView.getLocationInWindow(topLeft);
829                endingY -= topLeft[1];
830            }
831            ObjectAnimator a = ObjectAnimator.ofFloat(mContainerView, View.TRANSLATION_Y, endingY);
832            a.addUpdateListener(mUpdateListener);
833            AnimatorSet.Builder b = anim.play(a);
834            if (mContentAnimations && mContentView != null) {
835                b.with(ObjectAnimator.ofFloat(mContentView, View.TRANSLATION_Y,
836                        0, endingY));
837            }
838            if (mSplitView != null && mSplitView.getVisibility() == View.VISIBLE) {
839                mSplitView.setAlpha(1);
840                b.with(ObjectAnimator.ofFloat(mSplitView, View.TRANSLATION_Y,
841                        mSplitView.getHeight()));
842            }
843            anim.setInterpolator(AnimationUtils.loadInterpolator(mContext,
844                    com.android.internal.R.interpolator.accelerate_cubic));
845            anim.setDuration(250);
846            anim.addListener(mHideListener);
847            mCurrentShowAnim = anim;
848            anim.start();
849        } else {
850            mHideListener.onAnimationEnd(null);
851        }
852    }
853
854    public boolean isShowing() {
855        final int height = getHeight();
856        // Take into account the case where the bar has a 0 height due to not being measured yet.
857        return mNowShowing && (height == 0 || getHideOffset() < height);
858    }
859
860    void animateToMode(boolean toActionMode) {
861        if (toActionMode) {
862            showForActionMode();
863        } else {
864            hideForActionMode();
865        }
866
867        mDecorToolbar.animateToVisibility(toActionMode ? View.GONE : View.VISIBLE);
868        mContextView.animateToVisibility(toActionMode ? View.VISIBLE : View.GONE);
869        // mTabScrollView's visibility is not affected by action mode.
870    }
871
872    public Context getThemedContext() {
873        if (mThemedContext == null) {
874            TypedValue outValue = new TypedValue();
875            Resources.Theme currentTheme = mContext.getTheme();
876            currentTheme.resolveAttribute(com.android.internal.R.attr.actionBarWidgetTheme,
877                    outValue, true);
878            final int targetThemeRes = outValue.resourceId;
879
880            if (targetThemeRes != 0 && mContext.getThemeResId() != targetThemeRes) {
881                mThemedContext = new ContextThemeWrapper(mContext, targetThemeRes);
882            } else {
883                mThemedContext = mContext;
884            }
885        }
886        return mThemedContext;
887    }
888
889    @Override
890    public boolean isTitleTruncated() {
891        return mDecorToolbar != null && mDecorToolbar.isTitleTruncated();
892    }
893
894    @Override
895    public void setHomeAsUpIndicator(Drawable indicator) {
896        mDecorToolbar.setNavigationIcon(indicator);
897    }
898
899    @Override
900    public void setHomeAsUpIndicator(int resId) {
901        mDecorToolbar.setNavigationIcon(resId);
902    }
903
904    @Override
905    public void setHomeActionContentDescription(CharSequence description) {
906        mDecorToolbar.setNavigationContentDescription(description);
907    }
908
909    @Override
910    public void setHomeActionContentDescription(int resId) {
911        mDecorToolbar.setNavigationContentDescription(resId);
912    }
913
914    @Override
915    public void onContentScrollStarted() {
916        if (mCurrentShowAnim != null) {
917            mCurrentShowAnim.cancel();
918            mCurrentShowAnim = null;
919        }
920    }
921
922    @Override
923    public void onContentScrollStopped() {
924    }
925
926    @Override
927    public boolean collapseActionView() {
928        if (mDecorToolbar != null && mDecorToolbar.hasExpandedActionView()) {
929            mDecorToolbar.collapseActionView();
930            return true;
931        }
932        return false;
933    }
934
935    /**
936     * @hide
937     */
938    public class ActionModeImpl extends ActionMode implements MenuBuilder.Callback {
939        private final Context mActionModeContext;
940        private final MenuBuilder mMenu;
941
942        private ActionMode.Callback mCallback;
943        private WeakReference<View> mCustomView;
944
945        public ActionModeImpl(Context context, ActionMode.Callback callback) {
946            mActionModeContext = context;
947            mCallback = callback;
948            mMenu = new MenuBuilder(context)
949                    .setDefaultShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
950            mMenu.setCallback(this);
951        }
952
953        @Override
954        public MenuInflater getMenuInflater() {
955            return new MenuInflater(mActionModeContext);
956        }
957
958        @Override
959        public Menu getMenu() {
960            return mMenu;
961        }
962
963        @Override
964        public void finish() {
965            if (mActionMode != this) {
966                // Not the active action mode - no-op
967                return;
968            }
969
970            // If this change in state is going to cause the action bar
971            // to be hidden, defer the onDestroy callback until the animation
972            // is finished and associated relayout is about to happen. This lets
973            // apps better anticipate visibility and layout behavior.
974            if (!checkShowingFlags(mHiddenByApp, mHiddenBySystem, false)) {
975                // With the current state but the action bar hidden, our
976                // overall showing state is going to be false.
977                mDeferredDestroyActionMode = this;
978                mDeferredModeDestroyCallback = mCallback;
979            } else {
980                mCallback.onDestroyActionMode(this);
981            }
982            mCallback = null;
983            animateToMode(false);
984
985            // Clear out the context mode views after the animation finishes
986            mContextView.closeMode();
987            mDecorToolbar.getViewGroup().sendAccessibilityEvent(
988                    AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED);
989            mOverlayLayout.setHideOnContentScrollEnabled(mHideOnContentScroll);
990
991            mActionMode = null;
992        }
993
994        @Override
995        public void invalidate() {
996            mMenu.stopDispatchingItemsChanged();
997            try {
998                mCallback.onPrepareActionMode(this, mMenu);
999            } finally {
1000                mMenu.startDispatchingItemsChanged();
1001            }
1002        }
1003
1004        public boolean dispatchOnCreate() {
1005            mMenu.stopDispatchingItemsChanged();
1006            try {
1007                return mCallback.onCreateActionMode(this, mMenu);
1008            } finally {
1009                mMenu.startDispatchingItemsChanged();
1010            }
1011        }
1012
1013        @Override
1014        public void setCustomView(View view) {
1015            mContextView.setCustomView(view);
1016            mCustomView = new WeakReference<View>(view);
1017        }
1018
1019        @Override
1020        public void setSubtitle(CharSequence subtitle) {
1021            mContextView.setSubtitle(subtitle);
1022        }
1023
1024        @Override
1025        public void setTitle(CharSequence title) {
1026            mContextView.setTitle(title);
1027        }
1028
1029        @Override
1030        public void setTitle(int resId) {
1031            setTitle(mContext.getResources().getString(resId));
1032        }
1033
1034        @Override
1035        public void setSubtitle(int resId) {
1036            setSubtitle(mContext.getResources().getString(resId));
1037        }
1038
1039        @Override
1040        public CharSequence getTitle() {
1041            return mContextView.getTitle();
1042        }
1043
1044        @Override
1045        public CharSequence getSubtitle() {
1046            return mContextView.getSubtitle();
1047        }
1048
1049        @Override
1050        public void setTitleOptionalHint(boolean titleOptional) {
1051            super.setTitleOptionalHint(titleOptional);
1052            mContextView.setTitleOptional(titleOptional);
1053        }
1054
1055        @Override
1056        public boolean isTitleOptional() {
1057            return mContextView.isTitleOptional();
1058        }
1059
1060        @Override
1061        public View getCustomView() {
1062            return mCustomView != null ? mCustomView.get() : null;
1063        }
1064
1065        public boolean onMenuItemSelected(MenuBuilder menu, MenuItem item) {
1066            if (mCallback != null) {
1067                return mCallback.onActionItemClicked(this, item);
1068            } else {
1069                return false;
1070            }
1071        }
1072
1073        public void onCloseMenu(MenuBuilder menu, boolean allMenusAreClosing) {
1074        }
1075
1076        public boolean onSubMenuSelected(SubMenuBuilder subMenu) {
1077            if (mCallback == null) {
1078                return false;
1079            }
1080
1081            if (!subMenu.hasVisibleItems()) {
1082                return true;
1083            }
1084
1085            new MenuPopupHelper(getThemedContext(), subMenu).show();
1086            return true;
1087        }
1088
1089        public void onCloseSubMenu(SubMenuBuilder menu) {
1090        }
1091
1092        public void onMenuModeChange(MenuBuilder menu) {
1093            if (mCallback == null) {
1094                return;
1095            }
1096            invalidate();
1097            mContextView.showOverflowMenu();
1098        }
1099    }
1100
1101    /**
1102     * @hide
1103     */
1104    public class TabImpl extends ActionBar.Tab {
1105        private ActionBar.TabListener mCallback;
1106        private Object mTag;
1107        private Drawable mIcon;
1108        private CharSequence mText;
1109        private CharSequence mContentDesc;
1110        private int mPosition = -1;
1111        private View mCustomView;
1112
1113        @Override
1114        public Object getTag() {
1115            return mTag;
1116        }
1117
1118        @Override
1119        public Tab setTag(Object tag) {
1120            mTag = tag;
1121            return this;
1122        }
1123
1124        public ActionBar.TabListener getCallback() {
1125            return mCallback;
1126        }
1127
1128        @Override
1129        public Tab setTabListener(ActionBar.TabListener callback) {
1130            mCallback = callback;
1131            return this;
1132        }
1133
1134        @Override
1135        public View getCustomView() {
1136            return mCustomView;
1137        }
1138
1139        @Override
1140        public Tab setCustomView(View view) {
1141            mCustomView = view;
1142            if (mPosition >= 0) {
1143                mTabScrollView.updateTab(mPosition);
1144            }
1145            return this;
1146        }
1147
1148        @Override
1149        public Tab setCustomView(int layoutResId) {
1150            return setCustomView(LayoutInflater.from(getThemedContext())
1151                    .inflate(layoutResId, null));
1152        }
1153
1154        @Override
1155        public Drawable getIcon() {
1156            return mIcon;
1157        }
1158
1159        @Override
1160        public int getPosition() {
1161            return mPosition;
1162        }
1163
1164        public void setPosition(int position) {
1165            mPosition = position;
1166        }
1167
1168        @Override
1169        public CharSequence getText() {
1170            return mText;
1171        }
1172
1173        @Override
1174        public Tab setIcon(Drawable icon) {
1175            mIcon = icon;
1176            if (mPosition >= 0) {
1177                mTabScrollView.updateTab(mPosition);
1178            }
1179            return this;
1180        }
1181
1182        @Override
1183        public Tab setIcon(int resId) {
1184            return setIcon(mContext.getDrawable(resId));
1185        }
1186
1187        @Override
1188        public Tab setText(CharSequence text) {
1189            mText = text;
1190            if (mPosition >= 0) {
1191                mTabScrollView.updateTab(mPosition);
1192            }
1193            return this;
1194        }
1195
1196        @Override
1197        public Tab setText(int resId) {
1198            return setText(mContext.getResources().getText(resId));
1199        }
1200
1201        @Override
1202        public void select() {
1203            selectTab(this);
1204        }
1205
1206        @Override
1207        public Tab setContentDescription(int resId) {
1208            return setContentDescription(mContext.getResources().getText(resId));
1209        }
1210
1211        @Override
1212        public Tab setContentDescription(CharSequence contentDesc) {
1213            mContentDesc = contentDesc;
1214            if (mPosition >= 0) {
1215                mTabScrollView.updateTab(mPosition);
1216            }
1217            return this;
1218        }
1219
1220        @Override
1221        public CharSequence getContentDescription() {
1222            return mContentDesc;
1223        }
1224    }
1225
1226    @Override
1227    public void setCustomView(View view) {
1228        mDecorToolbar.setCustomView(view);
1229    }
1230
1231    @Override
1232    public void setCustomView(View view, LayoutParams layoutParams) {
1233        view.setLayoutParams(layoutParams);
1234        mDecorToolbar.setCustomView(view);
1235    }
1236
1237    @Override
1238    public void setListNavigationCallbacks(SpinnerAdapter adapter, OnNavigationListener callback) {
1239        mDecorToolbar.setDropdownParams(adapter, new NavItemSelectedListener(callback));
1240    }
1241
1242    @Override
1243    public int getSelectedNavigationIndex() {
1244        switch (mDecorToolbar.getNavigationMode()) {
1245            case NAVIGATION_MODE_TABS:
1246                return mSelectedTab != null ? mSelectedTab.getPosition() : -1;
1247            case NAVIGATION_MODE_LIST:
1248                return mDecorToolbar.getDropdownSelectedPosition();
1249            default:
1250                return -1;
1251        }
1252    }
1253
1254    @Override
1255    public int getNavigationItemCount() {
1256        switch (mDecorToolbar.getNavigationMode()) {
1257            case NAVIGATION_MODE_TABS:
1258                return mTabs.size();
1259            case NAVIGATION_MODE_LIST:
1260                return mDecorToolbar.getDropdownItemCount();
1261            default:
1262                return 0;
1263        }
1264    }
1265
1266    @Override
1267    public int getTabCount() {
1268        return mTabs.size();
1269    }
1270
1271    @Override
1272    public void setNavigationMode(int mode) {
1273        final int oldMode = mDecorToolbar.getNavigationMode();
1274        switch (oldMode) {
1275            case NAVIGATION_MODE_TABS:
1276                mSavedTabPosition = getSelectedNavigationIndex();
1277                selectTab(null);
1278                mTabScrollView.setVisibility(View.GONE);
1279                break;
1280        }
1281        if (oldMode != mode && !mHasEmbeddedTabs) {
1282            if (mOverlayLayout != null) {
1283                mOverlayLayout.requestFitSystemWindows();
1284            }
1285        }
1286        mDecorToolbar.setNavigationMode(mode);
1287        switch (mode) {
1288            case NAVIGATION_MODE_TABS:
1289                ensureTabsExist();
1290                mTabScrollView.setVisibility(View.VISIBLE);
1291                if (mSavedTabPosition != INVALID_POSITION) {
1292                    setSelectedNavigationItem(mSavedTabPosition);
1293                    mSavedTabPosition = INVALID_POSITION;
1294                }
1295                break;
1296        }
1297        mDecorToolbar.setCollapsible(mode == NAVIGATION_MODE_TABS && !mHasEmbeddedTabs);
1298        mOverlayLayout.setHasNonEmbeddedTabs(mode == NAVIGATION_MODE_TABS && !mHasEmbeddedTabs);
1299    }
1300
1301    @Override
1302    public Tab getTabAt(int index) {
1303        return mTabs.get(index);
1304    }
1305
1306
1307    @Override
1308    public void setIcon(int resId) {
1309        mDecorToolbar.setIcon(resId);
1310    }
1311
1312    @Override
1313    public void setIcon(Drawable icon) {
1314        mDecorToolbar.setIcon(icon);
1315    }
1316
1317    public boolean hasIcon() {
1318        return mDecorToolbar.hasIcon();
1319    }
1320
1321    @Override
1322    public void setLogo(int resId) {
1323        mDecorToolbar.setLogo(resId);
1324    }
1325
1326    @Override
1327    public void setLogo(Drawable logo) {
1328        mDecorToolbar.setLogo(logo);
1329    }
1330
1331    public boolean hasLogo() {
1332        return mDecorToolbar.hasLogo();
1333    }
1334
1335    public void setDefaultDisplayHomeAsUpEnabled(boolean enable) {
1336        if (!mDisplayHomeAsUpSet) {
1337            setDisplayHomeAsUpEnabled(enable);
1338        }
1339    }
1340
1341}
1342