LauncherAppState.java revision 2003c75ac43ecd66ee8a89142b7969feb993abe7 
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.ComponentName;
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.util.Thunk;
30
31import java.lang.ref.WeakReference;
32
33public class LauncherAppState {
34
35    private final AppFilter mAppFilter;
36    private final BuildInfo mBuildInfo;
37    @Thunk final LauncherModel mModel;
38    private final IconCache mIconCache;
39    private final WidgetPreviewLoader mWidgetCache;
40
41    private 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        mBuildInfo = BuildInfo.loadByName(sContext.getString(R.string.build_info_class));
91        mModel = new LauncherModel(this, mIconCache, mAppFilter);
92
93        LauncherAppsCompat.getInstance(sContext).addOnAppsChangedCallback(mModel);
94
95        // Register intent receivers
96        IntentFilter filter = new IntentFilter();
97        filter.addAction(Intent.ACTION_LOCALE_CHANGED);
98        filter.addAction(SearchManager.INTENT_GLOBAL_SEARCH_ACTIVITY_CHANGED);
99        filter.addAction(SearchManager.INTENT_ACTION_SEARCHABLES_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    }
106
107    /**
108     * Call from Application.onTerminate(), which is not guaranteed to ever be called.
109     */
110    public void onTerminate() {
111        sContext.unregisterReceiver(mModel);
112        final LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(sContext);
113        launcherApps.removeOnAppsChangedCallback(mModel);
114        PackageInstallerCompat.getInstance(sContext).onStop();
115    }
116
117    /**
118     * Reloads the workspace items from the DB and re-binds the workspace. This should generally
119     * not be called as DB updates are automatically followed by UI update
120     */
121    public void reloadWorkspace() {
122        mModel.resetLoadedState(false, true);
123        mModel.startLoaderFromBackground();
124    }
125
126    LauncherModel setLauncher(Launcher launcher) {
127        getLauncherProvider().setLauncherProviderChangeListener(launcher);
128        mModel.initialize(launcher);
129        mAccessibilityDelegate = ((launcher != null) && Utilities.isLmpOrAbove()) ?
130            new LauncherAccessibilityDelegate(launcher) : null;
131        return mModel;
132    }
133
134    public LauncherAccessibilityDelegate getAccessibilityDelegate() {
135        return mAccessibilityDelegate;
136    }
137
138    public IconCache getIconCache() {
139        return mIconCache;
140    }
141
142    public LauncherModel getModel() {
143        return mModel;
144    }
145
146    /**
147     * TODO(winsonc, hyunyoungs): We need to respect this
148     */
149    boolean shouldShowAppOrWidgetProvider(ComponentName componentName) {
150        return mAppFilter == null || mAppFilter.shouldShowApp(componentName);
151    }
152
153    static void setLauncherProvider(LauncherProvider provider) {
154        sLauncherProvider = new WeakReference<LauncherProvider>(provider);
155    }
156
157    static LauncherProvider getLauncherProvider() {
158        return sLauncherProvider.get();
159    }
160
161    public static String getSharedPreferencesKey() {
162        return LauncherFiles.SHARED_PREFERENCES_KEY;
163    }
164
165    public WidgetPreviewLoader getWidgetCache() {
166        return mWidgetCache;
167    }
168
169    public void onWallpaperChanged() {
170        mWallpaperChangedSinceLastCheck = true;
171    }
172
173    public boolean hasWallpaperChangedSinceLastCheck() {
174        boolean result = mWallpaperChangedSinceLastCheck;
175        mWallpaperChangedSinceLastCheck = false;
176        return result;
177    }
178
179    public InvariantDeviceProfile getInvariantDeviceProfile() {
180        return mInvariantDeviceProfile;
181    }
182
183    public static boolean isDogfoodBuild() {
184        return getInstance().mBuildInfo.isDogfoodBuild();
185    }
186}
187