LauncherAppState.java revision 4b17147c28488c20b01aea18297fd6a327bad213 
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.Thunk;
31
32import java.lang.ref.WeakReference;
33
34public class LauncherAppState {
35
36    private final AppFilter mAppFilter;
37    @Thunk final LauncherModel mModel;
38    private final IconCache mIconCache;
39    private final WidgetPreviewLoader mWidgetCache;
40
41    @Thunk boolean mWallpaperChangedSinceLastCheck;
42
43    private static WeakReference<LauncherProvider> sLauncherProvider;
44    private static Context sContext;
45
46    private static LauncherAppState INSTANCE;
47
48    private InvariantDeviceProfile mInvariantDeviceProfile;
49
50    private LauncherAccessibilityDelegate mAccessibilityDelegate;
51
52    public static LauncherAppState getInstance() {
53        if (INSTANCE == null) {
54            INSTANCE = new LauncherAppState();
55        }
56        return INSTANCE;
57    }
58
59    public static LauncherAppState getInstanceNoCreate() {
60        return INSTANCE;
61    }
62
63    public Context getContext() {
64        return sContext;
65    }
66
67    public static void setApplicationContext(Context context) {
68        if (sContext != null) {
69            Log.w(Launcher.TAG, "setApplicationContext called twice! old=" + sContext + " new=" + context);
70        }
71        sContext = context.getApplicationContext();
72    }
73
74    private LauncherAppState() {
75        if (sContext == null) {
76            throw new IllegalStateException("LauncherAppState inited before app context set");
77        }
78
79        Log.v(Launcher.TAG, "LauncherAppState inited");
80
81        if (sContext.getResources().getBoolean(R.bool.debug_memory_enabled)) {
82            MemoryTracker.startTrackingMe(sContext, "L");
83        }
84
85        mInvariantDeviceProfile = new InvariantDeviceProfile(sContext);
86        mIconCache = new IconCache(sContext, mInvariantDeviceProfile);
87        mWidgetCache = new WidgetPreviewLoader(sContext, mIconCache);
88
89        mAppFilter = AppFilter.loadByName(sContext.getString(R.string.app_filter_class));
90        mModel = new LauncherModel(this, mIconCache, mAppFilter);
91
92        LauncherAppsCompat.getInstance(sContext).addOnAppsChangedCallback(mModel);
93
94        // Register intent receivers
95        IntentFilter filter = new IntentFilter();
96        filter.addAction(Intent.ACTION_LOCALE_CHANGED);
97        filter.addAction(SearchManager.INTENT_GLOBAL_SEARCH_ACTIVITY_CHANGED);
98        // For handling managed profiles
99        filter.addAction(LauncherAppsCompat.ACTION_MANAGED_PROFILE_ADDED);
100        filter.addAction(LauncherAppsCompat.ACTION_MANAGED_PROFILE_REMOVED);
101
102        sContext.registerReceiver(mModel, filter);
103        UserManagerCompat.getInstance(sContext).enableAndResetCache();
104
105        if (!Utilities.ATLEAST_KITKAT) {
106            sContext.registerReceiver(new BroadcastReceiver() {
107
108                @Override
109                public void onReceive(Context context, Intent intent) {
110                    mWallpaperChangedSinceLastCheck = true;
111                }
112            }, new IntentFilter(Intent.ACTION_WALLPAPER_CHANGED));
113        }
114    }
115
116    /**
117     * Call from Application.onTerminate(), which is not guaranteed to ever be called.
118     */
119    public void onTerminate() {
120        sContext.unregisterReceiver(mModel);
121        final LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(sContext);
122        launcherApps.removeOnAppsChangedCallback(mModel);
123        PackageInstallerCompat.getInstance(sContext).onStop();
124    }
125
126    /**
127     * Reloads the workspace items from the DB and re-binds the workspace. This should generally
128     * not be called as DB updates are automatically followed by UI update
129     */
130    public void reloadWorkspace() {
131        mModel.resetLoadedState(false, true);
132        mModel.startLoaderFromBackground();
133    }
134
135    LauncherModel setLauncher(Launcher launcher) {
136        getLauncherProvider().setLauncherProviderChangeListener(launcher);
137        mModel.initialize(launcher);
138        mAccessibilityDelegate = ((launcher != null) && Utilities.ATLEAST_LOLLIPOP) ?
139            new LauncherAccessibilityDelegate(launcher) : null;
140        return mModel;
141    }
142
143    public LauncherAccessibilityDelegate getAccessibilityDelegate() {
144        return mAccessibilityDelegate;
145    }
146
147    public IconCache getIconCache() {
148        return mIconCache;
149    }
150
151    public LauncherModel getModel() {
152        return mModel;
153    }
154
155    static void setLauncherProvider(LauncherProvider provider) {
156        sLauncherProvider = new WeakReference<LauncherProvider>(provider);
157    }
158
159    public static LauncherProvider getLauncherProvider() {
160        return sLauncherProvider.get();
161    }
162
163    public static String getSharedPreferencesKey() {
164        return LauncherFiles.SHARED_PREFERENCES_KEY;
165    }
166
167    public WidgetPreviewLoader getWidgetCache() {
168        return mWidgetCache;
169    }
170
171    public boolean hasWallpaperChangedSinceLastCheck() {
172        boolean result = mWallpaperChangedSinceLastCheck;
173        mWallpaperChangedSinceLastCheck = false;
174        return result;
175    }
176
177    public InvariantDeviceProfile getInvariantDeviceProfile() {
178        return mInvariantDeviceProfile;
179    }
180}
181