LauncherAppState.java revision 71b5c0b988a64b3a0613ded5403749bc537ee8a5 
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 com.android.launcher3;
18
19import android.annotation.TargetApi;
20import android.app.SearchManager;
21import android.content.ComponentName;
22import android.content.ContentResolver;
23import android.content.Context;
24import android.content.Intent;
25import android.content.IntentFilter;
26import android.content.res.Configuration;
27import android.content.res.Resources;
28import android.database.ContentObserver;
29import android.graphics.Point;
30import android.os.Build;
31import android.os.Handler;
32import android.util.DisplayMetrics;
33import android.util.Log;
34import android.view.Display;
35import android.view.View.AccessibilityDelegate;
36import android.view.WindowManager;
37
38import com.android.launcher3.compat.LauncherAppsCompat;
39import com.android.launcher3.compat.PackageInstallerCompat;
40import com.android.launcher3.compat.PackageInstallerCompat.PackageInstallInfo;
41
42import java.lang.ref.WeakReference;
43import java.util.ArrayList;
44
45public class LauncherAppState implements DeviceProfile.DeviceProfileCallbacks {
46    private static final String TAG = "LauncherAppState";
47
48    private static final boolean DEBUG = false;
49
50    private final AppFilter mAppFilter;
51    private final BuildInfo mBuildInfo;
52    private final LauncherModel mModel;
53    private final IconCache mIconCache;
54
55    private final boolean mIsScreenLarge;
56    private final float mScreenDensity;
57    private final int mLongPressTimeout = 300;
58
59    private WidgetPreviewLoader.CacheDb mWidgetPreviewCacheDb;
60    private boolean mWallpaperChangedSinceLastCheck;
61
62    private static WeakReference<LauncherProvider> sLauncherProvider;
63    private static Context sContext;
64
65    private static LauncherAppState INSTANCE;
66
67    private DynamicGrid mDynamicGrid;
68    private AccessibilityDelegate mAccessibilityDelegate;
69
70    public static LauncherAppState getInstance() {
71        if (INSTANCE == null) {
72            INSTANCE = new LauncherAppState();
73        }
74        return INSTANCE;
75    }
76
77    public static LauncherAppState getInstanceNoCreate() {
78        return INSTANCE;
79    }
80
81    public Context getContext() {
82        return sContext;
83    }
84
85    public static void setApplicationContext(Context context) {
86        if (sContext != null) {
87            Log.w(Launcher.TAG, "setApplicationContext called twice! old=" + sContext + " new=" + context);
88        }
89        sContext = context.getApplicationContext();
90    }
91
92    private LauncherAppState() {
93        if (sContext == null) {
94            throw new IllegalStateException("LauncherAppState inited before app context set");
95        }
96
97        Log.v(Launcher.TAG, "LauncherAppState inited");
98
99        if (sContext.getResources().getBoolean(R.bool.debug_memory_enabled)) {
100            MemoryTracker.startTrackingMe(sContext, "L");
101        }
102
103        // set sIsScreenXLarge and mScreenDensity *before* creating icon cache
104        mIsScreenLarge = isScreenLarge(sContext.getResources());
105        mScreenDensity = sContext.getResources().getDisplayMetrics().density;
106
107        recreateWidgetPreviewDb();
108        mIconCache = new IconCache(sContext);
109
110        mAppFilter = AppFilter.loadByName(sContext.getString(R.string.app_filter_class));
111        mBuildInfo = BuildInfo.loadByName(sContext.getString(R.string.build_info_class));
112        mModel = new LauncherModel(this, mIconCache, mAppFilter);
113        final LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(sContext);
114        launcherApps.addOnAppsChangedCallback(mModel);
115
116        // Register intent receivers
117        IntentFilter filter = new IntentFilter();
118        filter.addAction(Intent.ACTION_LOCALE_CHANGED);
119        filter.addAction(Intent.ACTION_CONFIGURATION_CHANGED);
120        sContext.registerReceiver(mModel, filter);
121        filter = new IntentFilter();
122        filter.addAction(SearchManager.INTENT_GLOBAL_SEARCH_ACTIVITY_CHANGED);
123        sContext.registerReceiver(mModel, filter);
124        filter = new IntentFilter();
125        filter.addAction(SearchManager.INTENT_ACTION_SEARCHABLES_CHANGED);
126        sContext.registerReceiver(mModel, filter);
127
128        // Register for changes to the favorites
129        ContentResolver resolver = sContext.getContentResolver();
130        resolver.registerContentObserver(LauncherSettings.Favorites.CONTENT_URI, true,
131                mFavoritesObserver);
132    }
133
134    public void recreateWidgetPreviewDb() {
135        if (mWidgetPreviewCacheDb != null) {
136            mWidgetPreviewCacheDb.close();
137        }
138        mWidgetPreviewCacheDb = new WidgetPreviewLoader.CacheDb(sContext);
139    }
140
141    /**
142     * Call from Application.onTerminate(), which is not guaranteed to ever be called.
143     */
144    public void onTerminate() {
145        sContext.unregisterReceiver(mModel);
146        final LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(sContext);
147        launcherApps.removeOnAppsChangedCallback(mModel);
148        PackageInstallerCompat.getInstance(sContext).onStop();
149
150        ContentResolver resolver = sContext.getContentResolver();
151        resolver.unregisterContentObserver(mFavoritesObserver);
152    }
153
154    /**
155     * Receives notifications whenever the user favorites have changed.
156     */
157    private final ContentObserver mFavoritesObserver = new ContentObserver(new Handler()) {
158        @Override
159        public void onChange(boolean selfChange) {
160            // If the database has ever changed, then we really need to force a reload of the
161            // workspace on the next load
162            mModel.resetLoadedState(false, true);
163            mModel.startLoaderFromBackground();
164        }
165    };
166
167    LauncherModel setLauncher(Launcher launcher) {
168        mModel.initialize(launcher);
169        mAccessibilityDelegate = ((launcher != null) && Utilities.isLmpOrAbove()) ?
170            new LauncherAccessibilityDelegate(launcher) : null;
171        return mModel;
172    }
173
174    AccessibilityDelegate getAccessibilityDelegate() {
175        return mAccessibilityDelegate;
176    }
177
178    public IconCache getIconCache() {
179        return mIconCache;
180    }
181
182    LauncherModel getModel() {
183        return mModel;
184    }
185
186    boolean shouldShowAppOrWidgetProvider(ComponentName componentName) {
187        return mAppFilter == null || mAppFilter.shouldShowApp(componentName);
188    }
189
190    WidgetPreviewLoader.CacheDb getWidgetPreviewCacheDb() {
191        return mWidgetPreviewCacheDb;
192    }
193
194    static void setLauncherProvider(LauncherProvider provider) {
195        sLauncherProvider = new WeakReference<LauncherProvider>(provider);
196    }
197
198    static LauncherProvider getLauncherProvider() {
199        return sLauncherProvider.get();
200    }
201
202    public static String getSharedPreferencesKey() {
203        return LauncherFiles.SHARED_PREFERENCES_KEY;
204    }
205
206    @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
207    DeviceProfile initDynamicGrid(Context context) {
208        mDynamicGrid = createDynamicGrid(context, mDynamicGrid);
209        mDynamicGrid.getDeviceProfile().addCallback(this);
210        return mDynamicGrid.getDeviceProfile();
211    }
212
213    @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
214    static DynamicGrid createDynamicGrid(Context context, DynamicGrid dynamicGrid) {
215        // Determine the dynamic grid properties
216        WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
217        Display display = wm.getDefaultDisplay();
218
219        Point realSize = new Point();
220        display.getRealSize(realSize);
221        DisplayMetrics dm = new DisplayMetrics();
222        display.getMetrics(dm);
223
224        if (dynamicGrid == null) {
225            Point smallestSize = new Point();
226            Point largestSize = new Point();
227            display.getCurrentSizeRange(smallestSize, largestSize);
228
229            dynamicGrid = new DynamicGrid(context,
230                    context.getResources(),
231                    Math.min(smallestSize.x, smallestSize.y),
232                    Math.min(largestSize.x, largestSize.y),
233                    realSize.x, realSize.y,
234                    dm.widthPixels, dm.heightPixels);
235        }
236
237        // Update the icon size
238        DeviceProfile grid = dynamicGrid.getDeviceProfile();
239        grid.updateFromConfiguration(context, context.getResources(),
240                realSize.x, realSize.y,
241                dm.widthPixels, dm.heightPixels);
242        return dynamicGrid;
243    }
244
245    public DynamicGrid getDynamicGrid() {
246        return mDynamicGrid;
247    }
248
249    public boolean isScreenLarge() {
250        return mIsScreenLarge;
251    }
252
253    // Need a version that doesn't require an instance of LauncherAppState for the wallpaper picker
254    public static boolean isScreenLarge(Resources res) {
255        return res.getBoolean(R.bool.is_large_tablet);
256    }
257
258    public static boolean isScreenLandscape(Context context) {
259        return context.getResources().getConfiguration().orientation ==
260            Configuration.ORIENTATION_LANDSCAPE;
261    }
262
263    public float getScreenDensity() {
264        return mScreenDensity;
265    }
266
267    public int getLongPressTimeout() {
268        return mLongPressTimeout;
269    }
270
271    public void onWallpaperChanged() {
272        mWallpaperChangedSinceLastCheck = true;
273    }
274
275    public boolean hasWallpaperChangedSinceLastCheck() {
276        boolean result = mWallpaperChangedSinceLastCheck;
277        mWallpaperChangedSinceLastCheck = false;
278        return result;
279    }
280
281    @Override
282    public void onAvailableSizeChanged(DeviceProfile grid) {
283        Utilities.setIconSize(grid.iconSizePx);
284    }
285
286    public static boolean isDisableAllApps() {
287        // Returns false on non-dogfood builds.
288        return getInstance().mBuildInfo.isDogfoodBuild() &&
289                Utilities.isPropertyEnabled(Launcher.DISABLE_ALL_APPS_PROPERTY);
290    }
291
292    public static boolean isDogfoodBuild() {
293        return getInstance().mBuildInfo.isDogfoodBuild();
294    }
295
296    public void setPackageState(ArrayList<PackageInstallInfo> installInfo) {
297        mModel.setPackageState(installInfo);
298    }
299
300    /**
301     * Updates the icons and label of all icons for the provided package name.
302     */
303    public void updatePackageBadge(String packageName) {
304        mModel.updatePackageBadge(packageName);
305    }
306}
307