LauncherAppState.java revision 38e7f28d3faa04fa0bc0f15e78f59a2b1ed123a3 
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.BroadcastReceiver;
21import android.content.Context;
22import android.content.Intent;
23import android.content.IntentFilter;
24import android.util.Log;
25
26import com.android.launcher3.accessibility.LauncherAccessibilityDelegate;
27import com.android.launcher3.compat.LauncherAppsCompat;
28import com.android.launcher3.compat.PackageInstallerCompat;
29import com.android.launcher3.compat.UserManagerCompat;
30import com.android.launcher3.util.ConfigMonitor;
31import com.android.launcher3.util.TestingUtils;
32import com.android.launcher3.util.Thunk;
33
34import java.lang.ref.WeakReference;
35
36public class LauncherAppState {
37
38    private final AppFilter mAppFilter;
39    @Thunk final LauncherModel mModel;
40    private final IconCache mIconCache;
41    private final WidgetPreviewLoader mWidgetCache;
42
43    @Thunk boolean mWallpaperChangedSinceLastCheck;
44
45    private static WeakReference<LauncherProvider> sLauncherProvider;
46    private static Context sContext;
47
48    private static LauncherAppState INSTANCE;
49
50    private InvariantDeviceProfile mInvariantDeviceProfile;
51
52    private LauncherAccessibilityDelegate mAccessibilityDelegate;
53
54    public static LauncherAppState getInstance() {
55        if (INSTANCE == null) {
56            INSTANCE = new LauncherAppState();
57        }
58        return INSTANCE;
59    }
60
61    public static LauncherAppState getInstanceNoCreate() {
62        return INSTANCE;
63    }
64
65    public Context getContext() {
66        return sContext;
67    }
68
69    static void setLauncherProvider(LauncherProvider provider) {
70        if (sLauncherProvider != null) {
71            Log.w(Launcher.TAG, "setLauncherProvider called twice! old=" +
72                    sLauncherProvider.get() + " new=" + provider);
73        }
74        sLauncherProvider = new WeakReference<>(provider);
75
76        // The content provider exists for the entire duration of the launcher main process and
77        // is the first component to get created. Initializing application context here ensures
78        // that LauncherAppState always exists in the main process.
79        sContext = provider.getContext().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 (TestingUtils.MEMORY_DUMP_ENABLED) {
90            TestingUtils.startTrackingMemory(sContext);
91        }
92
93        mInvariantDeviceProfile = new InvariantDeviceProfile(sContext);
94        mIconCache = new IconCache(sContext, mInvariantDeviceProfile);
95        mWidgetCache = new WidgetPreviewLoader(sContext, mIconCache);
96
97        mAppFilter = AppFilter.loadByName(sContext.getString(R.string.app_filter_class));
98        mModel = new LauncherModel(this, mIconCache, mAppFilter);
99
100        LauncherAppsCompat.getInstance(sContext).addOnAppsChangedCallback(mModel);
101
102        // Register intent receivers
103        IntentFilter filter = new IntentFilter();
104        filter.addAction(Intent.ACTION_LOCALE_CHANGED);
105        filter.addAction(SearchManager.INTENT_GLOBAL_SEARCH_ACTIVITY_CHANGED);
106        // For handling managed profiles
107        filter.addAction(LauncherAppsCompat.ACTION_MANAGED_PROFILE_ADDED);
108        filter.addAction(LauncherAppsCompat.ACTION_MANAGED_PROFILE_REMOVED);
109
110        sContext.registerReceiver(mModel, filter);
111        UserManagerCompat.getInstance(sContext).enableAndResetCache();
112        if (!Utilities.ATLEAST_KITKAT) {
113            sContext.registerReceiver(new BroadcastReceiver() {
114
115                @Override
116                public void onReceive(Context context, Intent intent) {
117                    mWallpaperChangedSinceLastCheck = true;
118                }
119            }, new IntentFilter(Intent.ACTION_WALLPAPER_CHANGED));
120        }
121        new ConfigMonitor(sContext).register();
122    }
123
124    /**
125     * Call from Application.onTerminate(), which is not guaranteed to ever be called.
126     */
127    public void onTerminate() {
128        sContext.unregisterReceiver(mModel);
129        final LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(sContext);
130        launcherApps.removeOnAppsChangedCallback(mModel);
131        PackageInstallerCompat.getInstance(sContext).onStop();
132    }
133
134    /**
135     * Reloads the workspace items from the DB and re-binds the workspace. This should generally
136     * not be called as DB updates are automatically followed by UI update
137     */
138    public void reloadWorkspace() {
139        mModel.resetLoadedState(false, true);
140        mModel.startLoaderFromBackground();
141    }
142
143    LauncherModel setLauncher(Launcher launcher) {
144        sLauncherProvider.get().setLauncherProviderChangeListener(launcher);
145        mModel.initialize(launcher);
146        mAccessibilityDelegate = ((launcher != null) && Utilities.ATLEAST_LOLLIPOP) ?
147            new LauncherAccessibilityDelegate(launcher) : null;
148        return mModel;
149    }
150
151    public LauncherAccessibilityDelegate getAccessibilityDelegate() {
152        return mAccessibilityDelegate;
153    }
154
155    public IconCache getIconCache() {
156        return mIconCache;
157    }
158
159    public LauncherModel getModel() {
160        return mModel;
161    }
162
163    public WidgetPreviewLoader getWidgetCache() {
164        return mWidgetCache;
165    }
166
167    public boolean hasWallpaperChangedSinceLastCheck() {
168        boolean result = mWallpaperChangedSinceLastCheck;
169        mWallpaperChangedSinceLastCheck = false;
170        return result;
171    }
172
173    public InvariantDeviceProfile getInvariantDeviceProfile() {
174        return mInvariantDeviceProfile;
175    }
176}
177