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1/*
2 * Copyright (C) 2013 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.support.v7.app;
18
19import android.app.Activity;
20import android.content.Context;
21import android.content.res.TypedArray;
22import android.graphics.drawable.Drawable;
23import android.os.Bundle;
24import android.support.v7.appcompat.R;
25import android.support.v7.view.ActionMode;
26import android.support.v7.view.SupportMenuInflater;
27import android.support.v7.view.WindowCallbackWrapper;
28import android.support.v7.view.menu.MenuBuilder;
29import android.support.v7.widget.AppCompatDrawableManager;
30import android.support.v7.widget.TintTypedArray;
31import android.view.KeyEvent;
32import android.view.Menu;
33import android.view.MenuInflater;
34import android.view.View;
35import android.view.Window;
36
37abstract class AppCompatDelegateImplBase extends AppCompatDelegate {
38
39    private static final int[] sWindowBackgroundStyleable = {android.R.attr.windowBackground};
40
41    final Context mContext;
42    final Window mWindow;
43    final Window.Callback mOriginalWindowCallback;
44    final Window.Callback mAppCompatWindowCallback;
45    final AppCompatCallback mAppCompatCallback;
46
47    ActionBar mActionBar;
48    MenuInflater mMenuInflater;
49
50    // true if this activity has an action bar.
51    boolean mHasActionBar;
52    // true if this activity's action bar overlays other activity content.
53    boolean mOverlayActionBar;
54    // true if this any action modes should overlay the activity content
55    boolean mOverlayActionMode;
56    // true if this activity is floating (e.g. Dialog)
57    boolean mIsFloating;
58    // true if this activity has no title
59    boolean mWindowNoTitle;
60    // true if the theme has been read
61    boolean mThemeRead;
62
63    private CharSequence mTitle;
64
65    private boolean mIsDestroyed;
66
67    AppCompatDelegateImplBase(Context context, Window window, AppCompatCallback callback) {
68        mContext = context;
69        mWindow = window;
70        mAppCompatCallback = callback;
71
72        mOriginalWindowCallback = mWindow.getCallback();
73        if (mOriginalWindowCallback instanceof AppCompatWindowCallbackBase) {
74            throw new IllegalStateException(
75                    "AppCompat has already installed itself into the Window");
76        }
77        mAppCompatWindowCallback = wrapWindowCallback(mOriginalWindowCallback);
78        // Now install the new callback
79        mWindow.setCallback(mAppCompatWindowCallback);
80
81        final TintTypedArray a = TintTypedArray.obtainStyledAttributes(
82                context, null, sWindowBackgroundStyleable);
83        final Drawable winBg = a.getDrawableIfKnown(0);
84        if (winBg != null) {
85            mWindow.setBackgroundDrawable(winBg);
86        }
87        a.recycle();
88    }
89
90    abstract void initWindowDecorActionBar();
91
92    Window.Callback wrapWindowCallback(Window.Callback callback) {
93        return new AppCompatWindowCallbackBase(callback);
94    }
95
96    @Override
97    public ActionBar getSupportActionBar() {
98        // The Action Bar should be lazily created as hasActionBar
99        // could change after onCreate
100        initWindowDecorActionBar();
101        return mActionBar;
102    }
103
104    final ActionBar peekSupportActionBar() {
105        return mActionBar;
106    }
107
108    @Override
109    public MenuInflater getMenuInflater() {
110        // Make sure that action views can get an appropriate theme.
111        if (mMenuInflater == null) {
112            initWindowDecorActionBar();
113            mMenuInflater = new SupportMenuInflater(
114                    mActionBar != null ? mActionBar.getThemedContext() : mContext);
115        }
116        return mMenuInflater;
117    }
118
119    // Methods used to create and respond to options menu
120    abstract void onPanelClosed(int featureId, Menu menu);
121
122    abstract boolean onMenuOpened(int featureId, Menu menu);
123
124    abstract boolean dispatchKeyEvent(KeyEvent event);
125
126    abstract boolean onKeyShortcut(int keyCode, KeyEvent event);
127
128    @Override
129    public void setLocalNightMode(@NightMode int mode) {
130        // no-op
131    }
132
133    @Override
134    public final ActionBarDrawerToggle.Delegate getDrawerToggleDelegate() {
135        return new ActionBarDrawableToggleImpl();
136    }
137
138    final Context getActionBarThemedContext() {
139        Context context = null;
140
141        // If we have an action bar, let it return a themed context
142        ActionBar ab = getSupportActionBar();
143        if (ab != null) {
144            context = ab.getThemedContext();
145        }
146
147        if (context == null) {
148            context = mContext;
149        }
150        return context;
151    }
152
153    private class ActionBarDrawableToggleImpl implements ActionBarDrawerToggle.Delegate {
154        @Override
155        public Drawable getThemeUpIndicator() {
156            final TintTypedArray a = TintTypedArray.obtainStyledAttributes(
157                    getActionBarThemedContext(), null, new int[]{ R.attr.homeAsUpIndicator });
158            final Drawable result = a.getDrawable(0);
159            a.recycle();
160            return result;
161        }
162
163        @Override
164        public Context getActionBarThemedContext() {
165            return AppCompatDelegateImplBase.this.getActionBarThemedContext();
166        }
167
168        @Override
169        public boolean isNavigationVisible() {
170            final ActionBar ab = getSupportActionBar();
171            return ab != null && (ab.getDisplayOptions() & ActionBar.DISPLAY_HOME_AS_UP) != 0;
172        }
173
174        @Override
175        public void setActionBarUpIndicator(Drawable upDrawable, int contentDescRes) {
176            ActionBar ab = getSupportActionBar();
177            if (ab != null) {
178                ab.setHomeAsUpIndicator(upDrawable);
179                ab.setHomeActionContentDescription(contentDescRes);
180            }
181        }
182
183        @Override
184        public void setActionBarDescription(int contentDescRes) {
185            ActionBar ab = getSupportActionBar();
186            if (ab != null) {
187                ab.setHomeActionContentDescription(contentDescRes);
188            }
189        }
190    }
191
192    abstract ActionMode startSupportActionModeFromWindow(ActionMode.Callback callback);
193
194    @Override
195    public void onDestroy() {
196        mIsDestroyed = true;
197    }
198
199    @Override
200    public void setHandleNativeActionModesEnabled(boolean enabled) {
201        // no-op pre-v14
202    }
203
204    @Override
205    public boolean isHandleNativeActionModesEnabled() {
206        // Always false pre-v14
207        return false;
208    }
209
210    @Override
211    public boolean applyDayNight() {
212        // no-op on v7
213        return false;
214    }
215
216    final boolean isDestroyed() {
217        return mIsDestroyed;
218    }
219
220    final Window.Callback getWindowCallback() {
221        return mWindow.getCallback();
222    }
223
224    @Override
225    public final void setTitle(CharSequence title) {
226        mTitle = title;
227        onTitleChanged(title);
228    }
229
230    @Override
231    public void onSaveInstanceState(Bundle outState) {
232        // no-op
233    }
234
235    abstract void onTitleChanged(CharSequence title);
236
237    final CharSequence getTitle() {
238        // If the original window callback is an Activity, we'll use it's title
239        if (mOriginalWindowCallback instanceof Activity) {
240            return ((Activity) mOriginalWindowCallback).getTitle();
241        }
242        // Else, we'll return the title we have recorded ourselves
243        return mTitle;
244    }
245
246    class AppCompatWindowCallbackBase extends WindowCallbackWrapper {
247        AppCompatWindowCallbackBase(Window.Callback callback) {
248            super(callback);
249        }
250
251        @Override
252        public boolean dispatchKeyEvent(KeyEvent event) {
253            return AppCompatDelegateImplBase.this.dispatchKeyEvent(event)
254                    || super.dispatchKeyEvent(event);
255        }
256
257        @Override
258        public boolean dispatchKeyShortcutEvent(KeyEvent event) {
259            return super.dispatchKeyShortcutEvent(event)
260                    || AppCompatDelegateImplBase.this.onKeyShortcut(event.getKeyCode(), event);
261        }
262
263        @Override
264        public boolean onCreatePanelMenu(int featureId, Menu menu) {
265            if (featureId == Window.FEATURE_OPTIONS_PANEL && !(menu instanceof MenuBuilder)) {
266                // If this is an options menu but it's not an AppCompat menu, we eat the event
267                // and return false
268                return false;
269            }
270            return super.onCreatePanelMenu(featureId, menu);
271        }
272
273        @Override
274        public void onContentChanged() {
275            // We purposely do not propagate this call as this is called when we install
276            // our sub-decor rather than the user's content
277        }
278
279        @Override
280        public boolean onPreparePanel(int featureId, View view, Menu menu) {
281            final MenuBuilder mb = menu instanceof MenuBuilder ? (MenuBuilder) menu : null;
282
283            if (featureId == Window.FEATURE_OPTIONS_PANEL && mb == null) {
284                // If this is an options menu but it's not an AppCompat menu, we eat the event
285                // and return false
286                return false;
287            }
288
289            // On ICS and below devices, onPreparePanel calls menu.hasVisibleItems() to determine
290            // if a panel is prepared. This interferes with any initially invisible items, which
291            // are later made visible. We workaround it by making hasVisibleItems() always
292            // return true during the onPreparePanel call.
293            if (mb != null) {
294                mb.setOverrideVisibleItems(true);
295            }
296
297            final boolean handled = super.onPreparePanel(featureId, view, menu);
298
299            if (mb != null) {
300                mb.setOverrideVisibleItems(false);
301            }
302
303            return handled;
304        }
305
306        @Override
307        public boolean onMenuOpened(int featureId, Menu menu) {
308            super.onMenuOpened(featureId, menu);
309            AppCompatDelegateImplBase.this.onMenuOpened(featureId, menu);
310            return true;
311        }
312
313        @Override
314        public void onPanelClosed(int featureId, Menu menu) {
315            super.onPanelClosed(featureId, menu);
316            AppCompatDelegateImplBase.this.onPanelClosed(featureId, menu);
317        }
318    }
319}
320