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.config.ProviderConfig;
29import com.android.launcher3.dynamicui.ExtractionUtils;
30import com.android.launcher3.logging.FileLog;
31import com.android.launcher3.shortcuts.DeepShortcutManager;
32import com.android.launcher3.shortcuts.ShortcutCache;
33import com.android.launcher3.util.ConfigMonitor;
34import com.android.launcher3.util.TestingUtils;
35import com.android.launcher3.util.Thunk;
36
37import java.lang.ref.WeakReference;
38
39public class LauncherAppState {
40
41    public static final boolean PROFILE_STARTUP = ProviderConfig.IS_DOGFOOD_BUILD;
42
43    private final AppFilter mAppFilter;
44    @Thunk final LauncherModel mModel;
45    private final IconCache mIconCache;
46    private final WidgetPreviewLoader mWidgetCache;
47    private final DeepShortcutManager mDeepShortcutManager;
48
49    @Thunk boolean mWallpaperChangedSinceLastCheck;
50
51    private static WeakReference<LauncherProvider> sLauncherProvider;
52    private static Context sContext;
53
54    private static LauncherAppState INSTANCE;
55
56    private InvariantDeviceProfile mInvariantDeviceProfile;
57
58    public static LauncherAppState getInstance() {
59        if (INSTANCE == null) {
60            INSTANCE = new LauncherAppState();
61        }
62        return INSTANCE;
63    }
64
65    public static LauncherAppState getInstanceNoCreate() {
66        return INSTANCE;
67    }
68
69    public Context getContext() {
70        return sContext;
71    }
72
73    static void setLauncherProvider(LauncherProvider provider) {
74        if (sLauncherProvider != null) {
75            Log.w(Launcher.TAG, "setLauncherProvider called twice! old=" +
76                    sLauncherProvider.get() + " new=" + provider);
77        }
78        sLauncherProvider = new WeakReference<>(provider);
79
80        // The content provider exists for the entire duration of the launcher main process and
81        // is the first component to get created. Initializing application context here ensures
82        // that LauncherAppState always exists in the main process.
83        sContext = provider.getContext().getApplicationContext();
84        FileLog.setDir(sContext.getFilesDir());
85    }
86
87    private LauncherAppState() {
88        if (sContext == null) {
89            throw new IllegalStateException("LauncherAppState inited before app context set");
90        }
91
92        Log.v(Launcher.TAG, "LauncherAppState inited");
93
94        if (TestingUtils.MEMORY_DUMP_ENABLED) {
95            TestingUtils.startTrackingMemory(sContext);
96        }
97
98        mInvariantDeviceProfile = new InvariantDeviceProfile(sContext);
99        mIconCache = new IconCache(sContext, mInvariantDeviceProfile);
100        mWidgetCache = new WidgetPreviewLoader(sContext, mIconCache);
101        mDeepShortcutManager = new DeepShortcutManager(sContext, new ShortcutCache());
102
103        mAppFilter = AppFilter.loadByName(sContext.getString(R.string.app_filter_class));
104        mModel = new LauncherModel(this, mIconCache, mAppFilter, mDeepShortcutManager);
105
106        LauncherAppsCompat.getInstance(sContext).addOnAppsChangedCallback(mModel);
107
108        // Register intent receivers
109        IntentFilter filter = new IntentFilter();
110        filter.addAction(Intent.ACTION_LOCALE_CHANGED);
111        // For handling managed profiles
112        filter.addAction(Intent.ACTION_MANAGED_PROFILE_ADDED);
113        filter.addAction(Intent.ACTION_MANAGED_PROFILE_REMOVED);
114        filter.addAction(Intent.ACTION_MANAGED_PROFILE_AVAILABLE);
115        filter.addAction(Intent.ACTION_MANAGED_PROFILE_UNAVAILABLE);
116        filter.addAction(Intent.ACTION_MANAGED_PROFILE_UNLOCKED);
117        // For extracting colors from the wallpaper
118        if (Utilities.isNycOrAbove()) {
119            // TODO: add a broadcast entry to the manifest for pre-N.
120            filter.addAction(Intent.ACTION_WALLPAPER_CHANGED);
121        }
122
123        sContext.registerReceiver(mModel, filter);
124        UserManagerCompat.getInstance(sContext).enableAndResetCache();
125        if (!Utilities.ATLEAST_KITKAT) {
126            sContext.registerReceiver(new BroadcastReceiver() {
127
128                @Override
129                public void onReceive(Context context, Intent intent) {
130                    mWallpaperChangedSinceLastCheck = true;
131                }
132            }, new IntentFilter(Intent.ACTION_WALLPAPER_CHANGED));
133        }
134        new ConfigMonitor(sContext).register();
135
136        ExtractionUtils.startColorExtractionServiceIfNecessary(sContext);
137    }
138
139    /**
140     * Call from Application.onTerminate(), which is not guaranteed to ever be called.
141     */
142    public void onTerminate() {
143        sContext.unregisterReceiver(mModel);
144        final LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(sContext);
145        launcherApps.removeOnAppsChangedCallback(mModel);
146        PackageInstallerCompat.getInstance(sContext).onStop();
147    }
148
149    /**
150     * Reloads the workspace items from the DB and re-binds the workspace. This should generally
151     * not be called as DB updates are automatically followed by UI update
152     */
153    public void reloadWorkspace() {
154        mModel.resetLoadedState(false, true);
155        mModel.startLoaderFromBackground();
156    }
157
158    LauncherModel setLauncher(Launcher launcher) {
159        sLauncherProvider.get().setLauncherProviderChangeListener(launcher);
160        mModel.initialize(launcher);
161        return mModel;
162    }
163
164    public IconCache getIconCache() {
165        return mIconCache;
166    }
167
168    public LauncherModel getModel() {
169        return mModel;
170    }
171
172    public WidgetPreviewLoader getWidgetCache() {
173        return mWidgetCache;
174    }
175
176    public DeepShortcutManager getShortcutManager() {
177        return mDeepShortcutManager;
178    }
179
180    public boolean hasWallpaperChangedSinceLastCheck() {
181        boolean result = mWallpaperChangedSinceLastCheck;
182        mWallpaperChangedSinceLastCheck = false;
183        return result;
184    }
185
186    public InvariantDeviceProfile getInvariantDeviceProfile() {
187        return mInvariantDeviceProfile;
188    }
189}
190