LauncherAppState.java revision 28db280b7af14614f2b168ea8c5d496cda650321 
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.app.SearchManager;
20import android.content.ComponentName;
21import android.content.ContentResolver;
22import android.content.Context;
23import android.content.Intent;
24import android.content.IntentFilter;
25import android.content.res.Configuration;
26import android.content.res.Resources;
27import android.database.ContentObserver;
28import android.os.Handler;
29import android.util.Log;
30
31import com.android.launcher3.compat.LauncherAppsCompat;
32import com.android.launcher3.compat.PackageInstallerCompat.PackageInstallInfo;
33
34import java.lang.ref.WeakReference;
35import java.util.ArrayList;
36
37public class LauncherAppState implements DeviceProfile.DeviceProfileCallbacks {
38    private static final String TAG = "LauncherAppState";
39
40    private static final boolean DEBUG = false;
41
42    private final AppFilter mAppFilter;
43    private final BuildInfo mBuildInfo;
44    private LauncherModel mModel;
45    private IconCache mIconCache;
46    private WidgetPreviewLoader.CacheDb mWidgetPreviewCacheDb;
47    private boolean mIsScreenLarge;
48    private float mScreenDensity;
49    private int mLongPressTimeout = 300;
50    private boolean mWallpaperChangedSinceLastCheck;
51
52    private static WeakReference<LauncherProvider> sLauncherProvider;
53    private static Context sContext;
54
55    private static LauncherAppState INSTANCE;
56
57    private DynamicGrid mDynamicGrid;
58
59    public static LauncherAppState getInstance() {
60        if (INSTANCE == null) {
61            INSTANCE = new LauncherAppState();
62        }
63        return INSTANCE;
64    }
65
66    public static LauncherAppState getInstanceNoCreate() {
67        return INSTANCE;
68    }
69
70    public Context getContext() {
71        return sContext;
72    }
73
74    public static void setApplicationContext(Context context) {
75        if (sContext != null) {
76            Log.w(Launcher.TAG, "setApplicationContext called twice! old=" + sContext + " new=" + context);
77        }
78        sContext = context.getApplicationContext();
79    }
80
81    private LauncherAppState() {
82        if (sContext == null) {
83            throw new IllegalStateException("LauncherAppState inited before app context set");
84        }
85
86        Log.v(Launcher.TAG, "LauncherAppState inited");
87
88        if (sContext.getResources().getBoolean(R.bool.debug_memory_enabled)) {
89            MemoryTracker.startTrackingMe(sContext, "L");
90        }
91
92        // set sIsScreenXLarge and mScreenDensity *before* creating icon cache
93        mIsScreenLarge = isScreenLarge(sContext.getResources());
94        mScreenDensity = sContext.getResources().getDisplayMetrics().density;
95
96        recreateWidgetPreviewDb();
97        mIconCache = new IconCache(sContext);
98
99        mAppFilter = AppFilter.loadByName(sContext.getString(R.string.app_filter_class));
100        mBuildInfo = BuildInfo.loadByName(sContext.getString(R.string.build_info_class));
101        mModel = new LauncherModel(this, mIconCache, mAppFilter);
102        final LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(sContext);
103        launcherApps.addOnAppsChangedCallback(mModel);
104
105        // Register intent receivers
106        IntentFilter filter = new IntentFilter();
107        filter.addAction(Intent.ACTION_LOCALE_CHANGED);
108        filter.addAction(Intent.ACTION_CONFIGURATION_CHANGED);
109        sContext.registerReceiver(mModel, filter);
110        filter = new IntentFilter();
111        filter.addAction(SearchManager.INTENT_GLOBAL_SEARCH_ACTIVITY_CHANGED);
112        sContext.registerReceiver(mModel, filter);
113        filter = new IntentFilter();
114        filter.addAction(SearchManager.INTENT_ACTION_SEARCHABLES_CHANGED);
115        sContext.registerReceiver(mModel, filter);
116
117        // Register for changes to the favorites
118        ContentResolver resolver = sContext.getContentResolver();
119        resolver.registerContentObserver(LauncherSettings.Favorites.CONTENT_URI, true,
120                mFavoritesObserver);
121    }
122
123    public void recreateWidgetPreviewDb() {
124        if (mWidgetPreviewCacheDb != null) {
125            mWidgetPreviewCacheDb.close();
126        }
127        mWidgetPreviewCacheDb = new WidgetPreviewLoader.CacheDb(sContext);
128    }
129
130    /**
131     * Call from Application.onTerminate(), which is not guaranteed to ever be called.
132     */
133    public void onTerminate() {
134        sContext.unregisterReceiver(mModel);
135        final LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(sContext);
136        launcherApps.removeOnAppsChangedCallback(mModel);
137
138        ContentResolver resolver = sContext.getContentResolver();
139        resolver.unregisterContentObserver(mFavoritesObserver);
140    }
141
142    /**
143     * Receives notifications whenever the user favorites have changed.
144     */
145    private final ContentObserver mFavoritesObserver = new ContentObserver(new Handler()) {
146        @Override
147        public void onChange(boolean selfChange) {
148            // If the database has ever changed, then we really need to force a reload of the
149            // workspace on the next load
150            mModel.resetLoadedState(false, true);
151            mModel.startLoaderFromBackground();
152        }
153    };
154
155    LauncherModel setLauncher(Launcher launcher) {
156        if (mModel == null) {
157            throw new IllegalStateException("setLauncher() called before init()");
158        }
159        mModel.initialize(launcher);
160        return mModel;
161    }
162
163    public IconCache getIconCache() {
164        return mIconCache;
165    }
166
167    LauncherModel getModel() {
168        return mModel;
169    }
170
171    boolean shouldShowAppOrWidgetProvider(ComponentName componentName) {
172        return mAppFilter == null || mAppFilter.shouldShowApp(componentName);
173    }
174
175    WidgetPreviewLoader.CacheDb getWidgetPreviewCacheDb() {
176        return mWidgetPreviewCacheDb;
177    }
178
179    static void setLauncherProvider(LauncherProvider provider) {
180        sLauncherProvider = new WeakReference<LauncherProvider>(provider);
181    }
182
183    static LauncherProvider getLauncherProvider() {
184        return sLauncherProvider.get();
185    }
186
187    public static String getSharedPreferencesKey() {
188        return LauncherFiles.SHARED_PREFERENCES_KEY;
189    }
190
191    DeviceProfile initDynamicGrid(Context context, int minWidth, int minHeight,
192                                  int width, int height,
193                                  int availableWidth, int availableHeight) {
194        if (mDynamicGrid == null) {
195            mDynamicGrid = new DynamicGrid(context,
196                    context.getResources(),
197                    minWidth, minHeight, width, height,
198                    availableWidth, availableHeight);
199            mDynamicGrid.getDeviceProfile().addCallback(this);
200        }
201
202        // Update the icon size
203        DeviceProfile grid = mDynamicGrid.getDeviceProfile();
204        grid.updateFromConfiguration(context, context.getResources(), width, height,
205                availableWidth, availableHeight);
206        return grid;
207    }
208    public DynamicGrid getDynamicGrid() {
209        return mDynamicGrid;
210    }
211
212    public boolean isScreenLarge() {
213        return mIsScreenLarge;
214    }
215
216    // Need a version that doesn't require an instance of LauncherAppState for the wallpaper picker
217    public static boolean isScreenLarge(Resources res) {
218        return res.getBoolean(R.bool.is_large_tablet);
219    }
220
221    public static boolean isScreenLandscape(Context context) {
222        return context.getResources().getConfiguration().orientation ==
223            Configuration.ORIENTATION_LANDSCAPE;
224    }
225
226    public float getScreenDensity() {
227        return mScreenDensity;
228    }
229
230    public int getLongPressTimeout() {
231        return mLongPressTimeout;
232    }
233
234    public void onWallpaperChanged() {
235        mWallpaperChangedSinceLastCheck = true;
236    }
237
238    public boolean hasWallpaperChangedSinceLastCheck() {
239        boolean result = mWallpaperChangedSinceLastCheck;
240        mWallpaperChangedSinceLastCheck = false;
241        return result;
242    }
243
244    @Override
245    public void onAvailableSizeChanged(DeviceProfile grid) {
246        Utilities.setIconSize(grid.iconSizePx);
247    }
248
249    public static boolean isDisableAllApps() {
250        // Returns false on non-dogfood builds.
251        return getInstance().mBuildInfo.isDogfoodBuild() &&
252                Launcher.isPropertyEnabled(Launcher.DISABLE_ALL_APPS_PROPERTY);
253    }
254
255    public static boolean isDogfoodBuild() {
256        return getInstance().mBuildInfo.isDogfoodBuild();
257    }
258
259    public void setPackageState(ArrayList<PackageInstallInfo> installInfo) {
260        mModel.setPackageState(installInfo);
261    }
262
263    /**
264     * Updates the icons and label of all icons for the provided package name.
265     */
266    public void updatePackageBadge(String packageName) {
267        mModel.updatePackageBadge(packageName);
268    }
269}
270