LauncherAppState.java revision 823fd5090209017a029460e7dbd8ab9d51d013dd 
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.Thunk;
31
32import java.lang.ref.WeakReference;
33
34public class LauncherAppState {
35
36    private final AppFilter mAppFilter;
37    private final BuildInfo mBuildInfo;
38    @Thunk final LauncherModel mModel;
39    private final IconCache mIconCache;
40    private final WidgetPreviewLoader mWidgetCache;
41
42    private boolean mWallpaperChangedSinceLastCheck;
43
44    private static WeakReference<LauncherProvider> sLauncherProvider;
45    private static Context sContext;
46
47    private static LauncherAppState INSTANCE;
48
49    private InvariantDeviceProfile mInvariantDeviceProfile;
50
51    private LauncherAccessibilityDelegate mAccessibilityDelegate;
52
53    public static LauncherAppState getInstance() {
54        if (INSTANCE == null) {
55            INSTANCE = new LauncherAppState();
56        }
57        return INSTANCE;
58    }
59
60    public static LauncherAppState getInstanceNoCreate() {
61        return INSTANCE;
62    }
63
64    public Context getContext() {
65        return sContext;
66    }
67
68    public static void setApplicationContext(Context context) {
69        if (sContext != null) {
70            Log.w(Launcher.TAG, "setApplicationContext called twice! old=" + sContext + " new=" + context);
71        }
72        sContext = context.getApplicationContext();
73    }
74
75    private LauncherAppState() {
76        if (sContext == null) {
77            throw new IllegalStateException("LauncherAppState inited before app context set");
78        }
79
80        Log.v(Launcher.TAG, "LauncherAppState inited");
81
82        if (sContext.getResources().getBoolean(R.bool.debug_memory_enabled)) {
83            MemoryTracker.startTrackingMe(sContext, "L");
84        }
85
86        mInvariantDeviceProfile = new InvariantDeviceProfile(sContext);
87        mIconCache = new IconCache(sContext, mInvariantDeviceProfile);
88        mWidgetCache = new WidgetPreviewLoader(sContext, mIconCache);
89
90        mAppFilter = AppFilter.loadByName(sContext.getString(R.string.app_filter_class));
91        mBuildInfo = BuildInfo.loadByName(sContext.getString(R.string.build_info_class));
92        mModel = new LauncherModel(this, mIconCache, mAppFilter);
93
94        LauncherAppsCompat.getInstance(sContext).addOnAppsChangedCallback(mModel);
95
96        // Register intent receivers
97        IntentFilter filter = new IntentFilter();
98        filter.addAction(Intent.ACTION_LOCALE_CHANGED);
99        filter.addAction(SearchManager.INTENT_GLOBAL_SEARCH_ACTIVITY_CHANGED);
100        // For handling managed profiles
101        filter.addAction(LauncherAppsCompat.ACTION_MANAGED_PROFILE_ADDED);
102        filter.addAction(LauncherAppsCompat.ACTION_MANAGED_PROFILE_REMOVED);
103
104        sContext.registerReceiver(mModel, filter);
105        UserManagerCompat.getInstance(sContext).enableAndResetCache();
106    }
107
108    /**
109     * Call from Application.onTerminate(), which is not guaranteed to ever be called.
110     */
111    public void onTerminate() {
112        sContext.unregisterReceiver(mModel);
113        final LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(sContext);
114        launcherApps.removeOnAppsChangedCallback(mModel);
115        PackageInstallerCompat.getInstance(sContext).onStop();
116    }
117
118    /**
119     * Reloads the workspace items from the DB and re-binds the workspace. This should generally
120     * not be called as DB updates are automatically followed by UI update
121     */
122    public void reloadWorkspace() {
123        mModel.resetLoadedState(false, true);
124        mModel.startLoaderFromBackground();
125    }
126
127    LauncherModel setLauncher(Launcher launcher) {
128        getLauncherProvider().setLauncherProviderChangeListener(launcher);
129        mModel.initialize(launcher);
130        mAccessibilityDelegate = ((launcher != null) && Utilities.isLmpOrAbove()) ?
131            new LauncherAccessibilityDelegate(launcher) : null;
132        return mModel;
133    }
134
135    public LauncherAccessibilityDelegate getAccessibilityDelegate() {
136        return mAccessibilityDelegate;
137    }
138
139    public IconCache getIconCache() {
140        return mIconCache;
141    }
142
143    public LauncherModel getModel() {
144        return mModel;
145    }
146
147    static void setLauncherProvider(LauncherProvider provider) {
148        sLauncherProvider = new WeakReference<LauncherProvider>(provider);
149    }
150
151    public static LauncherProvider getLauncherProvider() {
152        return sLauncherProvider.get();
153    }
154
155    public static String getSharedPreferencesKey() {
156        return LauncherFiles.SHARED_PREFERENCES_KEY;
157    }
158
159    public WidgetPreviewLoader getWidgetCache() {
160        return mWidgetCache;
161    }
162
163    public void onWallpaperChanged() {
164        mWallpaperChangedSinceLastCheck = true;
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    public static boolean isDogfoodBuild() {
178        return getInstance().mBuildInfo.isDogfoodBuild();
179    }
180}
181