LauncherAppState.java revision a50a419b824c10f11d12097215982c978f740e00 
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.Context;
21import android.content.Intent;
22import android.content.IntentFilter;
23import android.os.UserManager;
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    private final BuildInfo mBuildInfo;
40    @Thunk final LauncherModel mModel;
41    private final IconCache mIconCache;
42    private final WidgetPreviewLoader mWidgetCache;
43
44    private boolean mWallpaperChangedSinceLastCheck;
45
46    private static WeakReference<LauncherProvider> sLauncherProvider;
47    private static Context sContext;
48
49    private static LauncherAppState INSTANCE;
50
51    private InvariantDeviceProfile mInvariantDeviceProfile;
52
53    private LauncherAccessibilityDelegate mAccessibilityDelegate;
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    public static void setApplicationContext(Context context) {
71        if (sContext != null) {
72            Log.w(Launcher.TAG, "setApplicationContext called twice! old=" + sContext + " new=" + context);
73        }
74        sContext = context.getApplicationContext();
75    }
76
77    private LauncherAppState() {
78        if (sContext == null) {
79            throw new IllegalStateException("LauncherAppState inited before app context set");
80        }
81
82        Log.v(Launcher.TAG, "LauncherAppState inited");
83
84        if (TestingUtils.MEMORY_DUMP_ENABLED) {
85            TestingUtils.startTrackingMemory(sContext);
86        }
87
88        mInvariantDeviceProfile = new InvariantDeviceProfile(sContext);
89        mIconCache = new IconCache(sContext, mInvariantDeviceProfile);
90        mWidgetCache = new WidgetPreviewLoader(sContext, mIconCache);
91
92        mAppFilter = AppFilter.loadByName(sContext.getString(R.string.app_filter_class));
93        mBuildInfo = BuildInfo.loadByName(sContext.getString(R.string.build_info_class));
94        mModel = new LauncherModel(this, mIconCache, mAppFilter);
95
96        LauncherAppsCompat.getInstance(sContext).addOnAppsChangedCallback(mModel);
97
98        // Register intent receivers
99        IntentFilter filter = new IntentFilter();
100        filter.addAction(Intent.ACTION_LOCALE_CHANGED);
101        filter.addAction(SearchManager.INTENT_GLOBAL_SEARCH_ACTIVITY_CHANGED);
102        // For handling managed profiles
103        filter.addAction(LauncherAppsCompat.ACTION_MANAGED_PROFILE_ADDED);
104        filter.addAction(LauncherAppsCompat.ACTION_MANAGED_PROFILE_REMOVED);
105
106        sContext.registerReceiver(mModel, filter);
107        UserManagerCompat.getInstance(sContext).enableAndResetCache();
108        new ConfigMonitor(sContext).register();
109    }
110
111    /**
112     * Call from Application.onTerminate(), which is not guaranteed to ever be called.
113     */
114    public void onTerminate() {
115        sContext.unregisterReceiver(mModel);
116        final LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(sContext);
117        launcherApps.removeOnAppsChangedCallback(mModel);
118        PackageInstallerCompat.getInstance(sContext).onStop();
119    }
120
121    /**
122     * Reloads the workspace items from the DB and re-binds the workspace. This should generally
123     * not be called as DB updates are automatically followed by UI update
124     */
125    public void reloadWorkspace() {
126        mModel.resetLoadedState(false, true);
127        mModel.startLoaderFromBackground();
128    }
129
130    LauncherModel setLauncher(Launcher launcher) {
131        getLauncherProvider().setLauncherProviderChangeListener(launcher);
132        mModel.initialize(launcher);
133        mAccessibilityDelegate = ((launcher != null) && Utilities.ATLEAST_LOLLIPOP) ?
134            new LauncherAccessibilityDelegate(launcher) : null;
135        return mModel;
136    }
137
138    public LauncherAccessibilityDelegate getAccessibilityDelegate() {
139        return mAccessibilityDelegate;
140    }
141
142    public IconCache getIconCache() {
143        return mIconCache;
144    }
145
146    public LauncherModel getModel() {
147        return mModel;
148    }
149
150    static void setLauncherProvider(LauncherProvider provider) {
151        sLauncherProvider = new WeakReference<LauncherProvider>(provider);
152    }
153
154    public static LauncherProvider getLauncherProvider() {
155        return sLauncherProvider.get();
156    }
157
158    public WidgetPreviewLoader getWidgetCache() {
159        return mWidgetCache;
160    }
161
162    public void onWallpaperChanged() {
163        mWallpaperChangedSinceLastCheck = true;
164    }
165
166    public boolean hasWallpaperChangedSinceLastCheck() {
167        boolean result = mWallpaperChangedSinceLastCheck;
168        mWallpaperChangedSinceLastCheck = false;
169        return result;
170    }
171
172    public InvariantDeviceProfile getInvariantDeviceProfile() {
173        return mInvariantDeviceProfile;
174    }
175
176    public static boolean isDogfoodBuild() {
177        return getInstance().mBuildInfo.isDogfoodBuild();
178    }
179}
180