LauncherAppState.java revision bfbf7f9f4a0b300613f0ff27a4eb592d88c08325 
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.content.BroadcastReceiver;
20import android.content.Context;
21import android.content.Intent;
22import android.content.IntentFilter;
23import android.util.Log;
24
25import com.android.launcher3.compat.LauncherAppsCompat;
26import com.android.launcher3.compat.PackageInstallerCompat;
27import com.android.launcher3.compat.UserManagerCompat;
28import com.android.launcher3.dynamicui.ExtractionUtils;
29import com.android.launcher3.logging.FileLog;
30import com.android.launcher3.shortcuts.DeepShortcutManager;
31import com.android.launcher3.shortcuts.ShortcutCache;
32import com.android.launcher3.util.ConfigMonitor;
33import com.android.launcher3.util.TestingUtils;
34import com.android.launcher3.util.Thunk;
35
36import java.lang.ref.WeakReference;
37
38public class LauncherAppState {
39
40    private final AppFilter mAppFilter;
41    @Thunk final LauncherModel mModel;
42    private final IconCache mIconCache;
43    private final WidgetPreviewLoader mWidgetCache;
44    private final DeepShortcutManager mDeepShortcutManager;
45
46    @Thunk boolean mWallpaperChangedSinceLastCheck;
47
48    private static WeakReference<LauncherProvider> sLauncherProvider;
49    private static Context sContext;
50
51    private static LauncherAppState INSTANCE;
52
53    private InvariantDeviceProfile mInvariantDeviceProfile;
54
55    public static LauncherAppState getInstance() {
56        if (INSTANCE == null) {
57            INSTANCE = new LauncherAppState();
58        }
59        return INSTANCE;
60    }
61
62    public static LauncherAppState getInstanceNoCreate() {
63        return INSTANCE;
64    }
65
66    public Context getContext() {
67        return sContext;
68    }
69
70    static void setLauncherProvider(LauncherProvider provider) {
71        if (sLauncherProvider != null) {
72            Log.w(Launcher.TAG, "setLauncherProvider called twice! old=" +
73                    sLauncherProvider.get() + " new=" + provider);
74        }
75        sLauncherProvider = new WeakReference<>(provider);
76
77        // The content provider exists for the entire duration of the launcher main process and
78        // is the first component to get created. Initializing application context here ensures
79        // that LauncherAppState always exists in the main process.
80        sContext = provider.getContext().getApplicationContext();
81        FileLog.setDir(sContext.getFilesDir());
82    }
83
84    private LauncherAppState() {
85        if (sContext == null) {
86            throw new IllegalStateException("LauncherAppState inited before app context set");
87        }
88
89        Log.v(Launcher.TAG, "LauncherAppState inited");
90
91        if (TestingUtils.MEMORY_DUMP_ENABLED) {
92            TestingUtils.startTrackingMemory(sContext);
93        }
94
95        mInvariantDeviceProfile = new InvariantDeviceProfile(sContext);
96        mIconCache = new IconCache(sContext, mInvariantDeviceProfile);
97        mWidgetCache = new WidgetPreviewLoader(sContext, mIconCache);
98        mDeepShortcutManager = new DeepShortcutManager(sContext, new ShortcutCache());
99
100        mAppFilter = AppFilter.loadByName(sContext.getString(R.string.app_filter_class));
101        mModel = new LauncherModel(this, mIconCache, mAppFilter, mDeepShortcutManager);
102
103        LauncherAppsCompat.getInstance(sContext).addOnAppsChangedCallback(mModel);
104
105        // Register intent receivers
106        IntentFilter filter = new IntentFilter();
107        filter.addAction(Intent.ACTION_LOCALE_CHANGED);
108        // For handling managed profiles
109        filter.addAction(LauncherAppsCompat.ACTION_MANAGED_PROFILE_ADDED);
110        filter.addAction(LauncherAppsCompat.ACTION_MANAGED_PROFILE_REMOVED);
111        filter.addAction(LauncherAppsCompat.ACTION_MANAGED_PROFILE_AVAILABLE);
112        filter.addAction(LauncherAppsCompat.ACTION_MANAGED_PROFILE_UNAVAILABLE);
113        // For extracting colors from the wallpaper
114        if (Utilities.isNycOrAbove()) {
115            // TODO: add a broadcast entry to the manifest for pre-N.
116            filter.addAction(Intent.ACTION_WALLPAPER_CHANGED);
117        }
118
119        sContext.registerReceiver(mModel, filter);
120        UserManagerCompat.getInstance(sContext).enableAndResetCache();
121        if (!Utilities.ATLEAST_KITKAT) {
122            sContext.registerReceiver(new BroadcastReceiver() {
123
124                @Override
125                public void onReceive(Context context, Intent intent) {
126                    mWallpaperChangedSinceLastCheck = true;
127                }
128            }, new IntentFilter(Intent.ACTION_WALLPAPER_CHANGED));
129        }
130        new ConfigMonitor(sContext).register();
131
132        ExtractionUtils.startColorExtractionServiceIfNecessary(sContext);
133    }
134
135    /**
136     * Call from Application.onTerminate(), which is not guaranteed to ever be called.
137     */
138    public void onTerminate() {
139        sContext.unregisterReceiver(mModel);
140        final LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(sContext);
141        launcherApps.removeOnAppsChangedCallback(mModel);
142        PackageInstallerCompat.getInstance(sContext).onStop();
143    }
144
145    /**
146     * Reloads the workspace items from the DB and re-binds the workspace. This should generally
147     * not be called as DB updates are automatically followed by UI update
148     */
149    public void reloadWorkspace() {
150        mModel.resetLoadedState(false, true);
151        mModel.startLoaderFromBackground();
152    }
153
154    LauncherModel setLauncher(Launcher launcher) {
155        sLauncherProvider.get().setLauncherProviderChangeListener(launcher);
156        mModel.initialize(launcher);
157        return mModel;
158    }
159
160    public IconCache getIconCache() {
161        return mIconCache;
162    }
163
164    public LauncherModel getModel() {
165        return mModel;
166    }
167
168    public WidgetPreviewLoader getWidgetCache() {
169        return mWidgetCache;
170    }
171
172    public DeepShortcutManager getShortcutManager() {
173        return mDeepShortcutManager;
174    }
175
176    public boolean hasWallpaperChangedSinceLastCheck() {
177        boolean result = mWallpaperChangedSinceLastCheck;
178        mWallpaperChangedSinceLastCheck = false;
179        return result;
180    }
181
182    public InvariantDeviceProfile getInvariantDeviceProfile() {
183        return mInvariantDeviceProfile;
184    }
185}
186