LauncherAppState.java revision ee52336a9ed0c98f78831a0e44b21f5a8d8c17d1 
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    private static final String SHARED_PREFERENCES_KEY = "com.android.launcher3.prefs";
40
41    private static final boolean DEBUG = false;
42
43    private final AppFilter mAppFilter;
44    private final BuildInfo mBuildInfo;
45    private LauncherModel mModel;
46    private IconCache mIconCache;
47    private WidgetPreviewLoader.CacheDb mWidgetPreviewCacheDb;
48    private boolean mIsScreenLarge;
49    private float mScreenDensity;
50    private int mLongPressTimeout = 300;
51    private boolean mWallpaperChangedSinceLastCheck;
52
53    private static WeakReference<LauncherProvider> sLauncherProvider;
54    private static Context sContext;
55
56    private static LauncherAppState INSTANCE;
57
58    private DynamicGrid mDynamicGrid;
59
60    public static LauncherAppState getInstance() {
61        if (INSTANCE == null) {
62            INSTANCE = new LauncherAppState();
63        }
64        return INSTANCE;
65    }
66
67    public static LauncherAppState getInstanceNoCreate() {
68        return INSTANCE;
69    }
70
71    public Context getContext() {
72        return sContext;
73    }
74
75    public static void setApplicationContext(Context context) {
76        if (sContext != null) {
77            Log.w(Launcher.TAG, "setApplicationContext called twice! old=" + sContext + " new=" + context);
78        }
79        sContext = context.getApplicationContext();
80    }
81
82    private LauncherAppState() {
83        if (sContext == null) {
84            throw new IllegalStateException("LauncherAppState inited before app context set");
85        }
86
87        Log.v(Launcher.TAG, "LauncherAppState inited");
88
89        if (sContext.getResources().getBoolean(R.bool.debug_memory_enabled)) {
90            MemoryTracker.startTrackingMe(sContext, "L");
91        }
92
93        // set sIsScreenXLarge and mScreenDensity *before* creating icon cache
94        mIsScreenLarge = isScreenLarge(sContext.getResources());
95        mScreenDensity = sContext.getResources().getDisplayMetrics().density;
96
97        recreateWidgetPreviewDb();
98        mIconCache = new IconCache(sContext);
99
100        mAppFilter = AppFilter.loadByName(sContext.getString(R.string.app_filter_class));
101        mBuildInfo = BuildInfo.loadByName(sContext.getString(R.string.build_info_class));
102        mModel = new LauncherModel(this, mIconCache, mAppFilter);
103        final LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(sContext);
104        launcherApps.addOnAppsChangedCallback(mModel);
105
106        // Register intent receivers
107        IntentFilter filter = new IntentFilter();
108        filter.addAction(Intent.ACTION_LOCALE_CHANGED);
109        filter.addAction(Intent.ACTION_CONFIGURATION_CHANGED);
110        sContext.registerReceiver(mModel, filter);
111        filter = new IntentFilter();
112        filter.addAction(SearchManager.INTENT_GLOBAL_SEARCH_ACTIVITY_CHANGED);
113        sContext.registerReceiver(mModel, filter);
114        filter = new IntentFilter();
115        filter.addAction(SearchManager.INTENT_ACTION_SEARCHABLES_CHANGED);
116        sContext.registerReceiver(mModel, filter);
117
118        // Register for changes to the favorites
119        ContentResolver resolver = sContext.getContentResolver();
120        resolver.registerContentObserver(LauncherSettings.Favorites.CONTENT_URI, true,
121                mFavoritesObserver);
122    }
123
124    public void recreateWidgetPreviewDb() {
125        if (mWidgetPreviewCacheDb != null) {
126            mWidgetPreviewCacheDb.close();
127        }
128        mWidgetPreviewCacheDb = new WidgetPreviewLoader.CacheDb(sContext);
129    }
130
131    /**
132     * Call from Application.onTerminate(), which is not guaranteed to ever be called.
133     */
134    public void onTerminate() {
135        sContext.unregisterReceiver(mModel);
136        final LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(sContext);
137        launcherApps.removeOnAppsChangedCallback(mModel);
138
139        ContentResolver resolver = sContext.getContentResolver();
140        resolver.unregisterContentObserver(mFavoritesObserver);
141    }
142
143    /**
144     * Receives notifications whenever the user favorites have changed.
145     */
146    private final ContentObserver mFavoritesObserver = new ContentObserver(new Handler()) {
147        @Override
148        public void onChange(boolean selfChange) {
149            // If the database has ever changed, then we really need to force a reload of the
150            // workspace on the next load
151            mModel.resetLoadedState(false, true);
152            mModel.startLoaderFromBackground();
153        }
154    };
155
156    LauncherModel setLauncher(Launcher launcher) {
157        if (mModel == null) {
158            throw new IllegalStateException("setLauncher() called before init()");
159        }
160        mModel.initialize(launcher);
161        return mModel;
162    }
163
164    public IconCache getIconCache() {
165        return mIconCache;
166    }
167
168    LauncherModel getModel() {
169        return mModel;
170    }
171
172    boolean shouldShowAppOrWidgetProvider(ComponentName componentName) {
173        return mAppFilter == null || mAppFilter.shouldShowApp(componentName);
174    }
175
176    WidgetPreviewLoader.CacheDb getWidgetPreviewCacheDb() {
177        return mWidgetPreviewCacheDb;
178    }
179
180    static void setLauncherProvider(LauncherProvider provider) {
181        sLauncherProvider = new WeakReference<LauncherProvider>(provider);
182    }
183
184    static LauncherProvider getLauncherProvider() {
185        return sLauncherProvider.get();
186    }
187
188    public static String getSharedPreferencesKey() {
189        return SHARED_PREFERENCES_KEY;
190    }
191
192    DeviceProfile initDynamicGrid(Context context, int minWidth, int minHeight,
193                                  int width, int height,
194                                  int availableWidth, int availableHeight) {
195        if (mDynamicGrid == null) {
196            mDynamicGrid = new DynamicGrid(context,
197                    context.getResources(),
198                    minWidth, minHeight, width, height,
199                    availableWidth, availableHeight);
200            mDynamicGrid.getDeviceProfile().addCallback(this);
201        }
202
203        // Update the icon size
204        DeviceProfile grid = mDynamicGrid.getDeviceProfile();
205        grid.updateFromConfiguration(context, context.getResources(), width, height,
206                availableWidth, availableHeight);
207        return grid;
208    }
209    public DynamicGrid getDynamicGrid() {
210        return mDynamicGrid;
211    }
212
213    public boolean isScreenLarge() {
214        return mIsScreenLarge;
215    }
216
217    // Need a version that doesn't require an instance of LauncherAppState for the wallpaper picker
218    public static boolean isScreenLarge(Resources res) {
219        return res.getBoolean(R.bool.is_large_tablet);
220    }
221
222    public static boolean isScreenLandscape(Context context) {
223        return context.getResources().getConfiguration().orientation ==
224            Configuration.ORIENTATION_LANDSCAPE;
225    }
226
227    public float getScreenDensity() {
228        return mScreenDensity;
229    }
230
231    public int getLongPressTimeout() {
232        return mLongPressTimeout;
233    }
234
235    public void onWallpaperChanged() {
236        mWallpaperChangedSinceLastCheck = true;
237    }
238
239    public boolean hasWallpaperChangedSinceLastCheck() {
240        boolean result = mWallpaperChangedSinceLastCheck;
241        mWallpaperChangedSinceLastCheck = false;
242        return result;
243    }
244
245    @Override
246    public void onAvailableSizeChanged(DeviceProfile grid) {
247        Utilities.setIconSize(grid.iconSizePx);
248    }
249
250    public static boolean isDisableAllApps() {
251        // Returns false on non-dogfood builds.
252        return getInstance().mBuildInfo.isDogfoodBuild() &&
253                Launcher.isPropertyEnabled(Launcher.DISABLE_ALL_APPS_PROPERTY);
254    }
255
256    public static boolean isDogfoodBuild() {
257        return getInstance().mBuildInfo.isDogfoodBuild();
258    }
259
260    public void setPackageState(ArrayList<PackageInstallInfo> installInfo) {
261        mModel.setPackageState(installInfo);
262    }
263}
264