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.Resources;
22import android.content.res.TypedArray;
23import android.graphics.drawable.Drawable;
24import android.os.Build;
25import android.os.Bundle;
26import android.support.v7.appcompat.R;
27import android.support.v7.view.ActionMode;
28import android.support.v7.view.SupportMenuInflater;
29import android.support.v7.view.WindowCallbackWrapper;
30import android.support.v7.view.menu.MenuBuilder;
31import android.support.v7.widget.AppCompatDrawableManager;
32import android.support.v7.widget.TintTypedArray;
33import android.view.KeyEvent;
34import android.view.Menu;
35import android.view.MenuInflater;
36import android.view.View;
37import android.view.Window;
38
39abstract class AppCompatDelegateImplBase extends AppCompatDelegate {
40
41    static final boolean DEBUG = false;
42
43    private static boolean sInstalledExceptionHandler;
44    private static final boolean SHOULD_INSTALL_EXCEPTION_HANDLER = Build.VERSION.SDK_INT < 21;
45
46    static final String EXCEPTION_HANDLER_MESSAGE_SUFFIX= ". If the resource you are"
47            + " trying to use is a vector resource, you may be referencing it in an unsupported"
48            + " way. See AppCompatDelegate.setCompatVectorFromResourcesEnabled() for more info.";
49
50    static {
51        if (SHOULD_INSTALL_EXCEPTION_HANDLER && !sInstalledExceptionHandler) {
52            final Thread.UncaughtExceptionHandler defHandler
53                    = Thread.getDefaultUncaughtExceptionHandler();
54
55            Thread.setDefaultUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {
56                @Override
57                public void uncaughtException(Thread thread, final Throwable thowable) {
58                    if (shouldWrapException(thowable)) {
59                        // Now wrap the throwable, but append some extra information to the message
60                        final Throwable wrapped = new Resources.NotFoundException(
61                                thowable.getMessage() + EXCEPTION_HANDLER_MESSAGE_SUFFIX);
62                        wrapped.initCause(thowable.getCause());
63                        wrapped.setStackTrace(thowable.getStackTrace());
64                        defHandler.uncaughtException(thread, wrapped);
65                    } else {
66                        defHandler.uncaughtException(thread, thowable);
67                    }
68                }
69
70                private boolean shouldWrapException(Throwable throwable) {
71                    if (throwable instanceof Resources.NotFoundException) {
72                        final String message = throwable.getMessage();
73                        return message != null && (message.contains("drawable")
74                                || message.contains("Drawable"));
75                    }
76                    return false;
77                }
78            });
79
80            sInstalledExceptionHandler = true;
81        }
82    }
83
84    private static final int[] sWindowBackgroundStyleable = {android.R.attr.windowBackground};
85
86    final Context mContext;
87    final Window mWindow;
88    final Window.Callback mOriginalWindowCallback;
89    final Window.Callback mAppCompatWindowCallback;
90    final AppCompatCallback mAppCompatCallback;
91
92    ActionBar mActionBar;
93    MenuInflater mMenuInflater;
94
95    // true if this activity has an action bar.
96    boolean mHasActionBar;
97    // true if this activity's action bar overlays other activity content.
98    boolean mOverlayActionBar;
99    // true if this any action modes should overlay the activity content
100    boolean mOverlayActionMode;
101    // true if this activity is floating (e.g. Dialog)
102    boolean mIsFloating;
103    // true if this activity has no title
104    boolean mWindowNoTitle;
105
106    private CharSequence mTitle;
107
108    private boolean mIsStarted;
109    private boolean mIsDestroyed;
110
111    AppCompatDelegateImplBase(Context context, Window window, AppCompatCallback callback) {
112        mContext = context;
113        mWindow = window;
114        mAppCompatCallback = callback;
115
116        mOriginalWindowCallback = mWindow.getCallback();
117        if (mOriginalWindowCallback instanceof AppCompatWindowCallbackBase) {
118            throw new IllegalStateException(
119                    "AppCompat has already installed itself into the Window");
120        }
121        mAppCompatWindowCallback = wrapWindowCallback(mOriginalWindowCallback);
122        // Now install the new callback
123        mWindow.setCallback(mAppCompatWindowCallback);
124
125        final TintTypedArray a = TintTypedArray.obtainStyledAttributes(
126                context, null, sWindowBackgroundStyleable);
127        final Drawable winBg = a.getDrawableIfKnown(0);
128        if (winBg != null) {
129            mWindow.setBackgroundDrawable(winBg);
130        }
131        a.recycle();
132    }
133
134    abstract void initWindowDecorActionBar();
135
136    Window.Callback wrapWindowCallback(Window.Callback callback) {
137        return new AppCompatWindowCallbackBase(callback);
138    }
139
140    @Override
141    public ActionBar getSupportActionBar() {
142        // The Action Bar should be lazily created as hasActionBar
143        // could change after onCreate
144        initWindowDecorActionBar();
145        return mActionBar;
146    }
147
148    final ActionBar peekSupportActionBar() {
149        return mActionBar;
150    }
151
152    @Override
153    public MenuInflater getMenuInflater() {
154        // Make sure that action views can get an appropriate theme.
155        if (mMenuInflater == null) {
156            initWindowDecorActionBar();
157            mMenuInflater = new SupportMenuInflater(
158                    mActionBar != null ? mActionBar.getThemedContext() : mContext);
159        }
160        return mMenuInflater;
161    }
162
163    // Methods used to create and respond to options menu
164    abstract void onPanelClosed(int featureId, Menu menu);
165
166    abstract boolean onMenuOpened(int featureId, Menu menu);
167
168    abstract boolean dispatchKeyEvent(KeyEvent event);
169
170    abstract boolean onKeyShortcut(int keyCode, KeyEvent event);
171
172    @Override
173    public void setLocalNightMode(@NightMode int mode) {
174        // no-op
175    }
176
177    @Override
178    public final ActionBarDrawerToggle.Delegate getDrawerToggleDelegate() {
179        return new ActionBarDrawableToggleImpl();
180    }
181
182    final Context getActionBarThemedContext() {
183        Context context = null;
184
185        // If we have an action bar, let it return a themed context
186        ActionBar ab = getSupportActionBar();
187        if (ab != null) {
188            context = ab.getThemedContext();
189        }
190
191        if (context == null) {
192            context = mContext;
193        }
194        return context;
195    }
196
197    private class ActionBarDrawableToggleImpl implements ActionBarDrawerToggle.Delegate {
198        ActionBarDrawableToggleImpl() {
199        }
200
201        @Override
202        public Drawable getThemeUpIndicator() {
203            final TintTypedArray a = TintTypedArray.obtainStyledAttributes(
204                    getActionBarThemedContext(), null, new int[]{ R.attr.homeAsUpIndicator });
205            final Drawable result = a.getDrawable(0);
206            a.recycle();
207            return result;
208        }
209
210        @Override
211        public Context getActionBarThemedContext() {
212            return AppCompatDelegateImplBase.this.getActionBarThemedContext();
213        }
214
215        @Override
216        public boolean isNavigationVisible() {
217            final ActionBar ab = getSupportActionBar();
218            return ab != null && (ab.getDisplayOptions() & ActionBar.DISPLAY_HOME_AS_UP) != 0;
219        }
220
221        @Override
222        public void setActionBarUpIndicator(Drawable upDrawable, int contentDescRes) {
223            ActionBar ab = getSupportActionBar();
224            if (ab != null) {
225                ab.setHomeAsUpIndicator(upDrawable);
226                ab.setHomeActionContentDescription(contentDescRes);
227            }
228        }
229
230        @Override
231        public void setActionBarDescription(int contentDescRes) {
232            ActionBar ab = getSupportActionBar();
233            if (ab != null) {
234                ab.setHomeActionContentDescription(contentDescRes);
235            }
236        }
237    }
238
239    abstract ActionMode startSupportActionModeFromWindow(ActionMode.Callback callback);
240
241    @Override
242    public void onStart() {
243        mIsStarted = true;
244    }
245
246    @Override
247    public void onStop() {
248        mIsStarted = false;
249    }
250
251    @Override
252    public void onDestroy() {
253        mIsDestroyed = true;
254    }
255
256    @Override
257    public void setHandleNativeActionModesEnabled(boolean enabled) {
258        // no-op pre-v14
259    }
260
261    @Override
262    public boolean isHandleNativeActionModesEnabled() {
263        // Always false pre-v14
264        return false;
265    }
266
267    @Override
268    public boolean applyDayNight() {
269        // no-op on v7
270        return false;
271    }
272
273    final boolean isDestroyed() {
274        return mIsDestroyed;
275    }
276
277    final boolean isStarted() {
278        return mIsStarted;
279    }
280
281    final Window.Callback getWindowCallback() {
282        return mWindow.getCallback();
283    }
284
285    @Override
286    public final void setTitle(CharSequence title) {
287        mTitle = title;
288        onTitleChanged(title);
289    }
290
291    @Override
292    public void onSaveInstanceState(Bundle outState) {
293        // no-op
294    }
295
296    abstract void onTitleChanged(CharSequence title);
297
298    final CharSequence getTitle() {
299        // If the original window callback is an Activity, we'll use it's title
300        if (mOriginalWindowCallback instanceof Activity) {
301            return ((Activity) mOriginalWindowCallback).getTitle();
302        }
303        // Else, we'll return the title we have recorded ourselves
304        return mTitle;
305    }
306
307    class AppCompatWindowCallbackBase extends WindowCallbackWrapper {
308        AppCompatWindowCallbackBase(Window.Callback callback) {
309            super(callback);
310        }
311
312        @Override
313        public boolean dispatchKeyEvent(KeyEvent event) {
314            return AppCompatDelegateImplBase.this.dispatchKeyEvent(event)
315                    || super.dispatchKeyEvent(event);
316        }
317
318        @Override
319        public boolean dispatchKeyShortcutEvent(KeyEvent event) {
320            return super.dispatchKeyShortcutEvent(event)
321                    || AppCompatDelegateImplBase.this.onKeyShortcut(event.getKeyCode(), event);
322        }
323
324        @Override
325        public boolean onCreatePanelMenu(int featureId, Menu menu) {
326            if (featureId == Window.FEATURE_OPTIONS_PANEL && !(menu instanceof MenuBuilder)) {
327                // If this is an options menu but it's not an AppCompat menu, we eat the event
328                // and return false
329                return false;
330            }
331            return super.onCreatePanelMenu(featureId, menu);
332        }
333
334        @Override
335        public void onContentChanged() {
336            // We purposely do not propagate this call as this is called when we install
337            // our sub-decor rather than the user's content
338        }
339
340        @Override
341        public boolean onPreparePanel(int featureId, View view, Menu menu) {
342            final MenuBuilder mb = menu instanceof MenuBuilder ? (MenuBuilder) menu : null;
343
344            if (featureId == Window.FEATURE_OPTIONS_PANEL && mb == null) {
345                // If this is an options menu but it's not an AppCompat menu, we eat the event
346                // and return false
347                return false;
348            }
349
350            // On ICS and below devices, onPreparePanel calls menu.hasVisibleItems() to determine
351            // if a panel is prepared. This interferes with any initially invisible items, which
352            // are later made visible. We workaround it by making hasVisibleItems() always
353            // return true during the onPreparePanel call.
354            if (mb != null) {
355                mb.setOverrideVisibleItems(true);
356            }
357
358            final boolean handled = super.onPreparePanel(featureId, view, menu);
359
360            if (mb != null) {
361                mb.setOverrideVisibleItems(false);
362            }
363
364            return handled;
365        }
366
367        @Override
368        public boolean onMenuOpened(int featureId, Menu menu) {
369            super.onMenuOpened(featureId, menu);
370            AppCompatDelegateImplBase.this.onMenuOpened(featureId, menu);
371            return true;
372        }
373
374        @Override
375        public void onPanelClosed(int featureId, Menu menu) {
376            super.onPanelClosed(featureId, menu);
377            AppCompatDelegateImplBase.this.onPanelClosed(featureId, menu);
378        }
379    }
380}
381