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.content.ContentProviderClient;
20import android.content.Context;
21import android.content.Intent;
22import android.content.IntentFilter;
23import android.os.Looper;
24import android.util.Log;
25
26import com.android.launcher3.compat.LauncherAppsCompat;
27import com.android.launcher3.compat.PackageInstallerCompat;
28import com.android.launcher3.compat.UserManagerCompat;
29import com.android.launcher3.config.ProviderConfig;
30import com.android.launcher3.dynamicui.ExtractionUtils;
31import com.android.launcher3.util.ConfigMonitor;
32import com.android.launcher3.util.Preconditions;
33import com.android.launcher3.util.TestingUtils;
34
35import java.util.concurrent.Callable;
36import java.util.concurrent.ExecutionException;
37
38public class LauncherAppState {
39
40    public static final boolean PROFILE_STARTUP = ProviderConfig.IS_DOGFOOD_BUILD;
41
42    // We do not need any synchronization for this variable as its only written on UI thread.
43    private static LauncherAppState INSTANCE;
44
45    private final Context mContext;
46    private final LauncherModel mModel;
47    private final IconCache mIconCache;
48    private final WidgetPreviewLoader mWidgetCache;
49    private final InvariantDeviceProfile mInvariantDeviceProfile;
50
51
52    public static LauncherAppState getInstance(final Context context) {
53        if (INSTANCE == null) {
54            if (Looper.myLooper() == Looper.getMainLooper()) {
55                INSTANCE = new LauncherAppState(context.getApplicationContext());
56            } else {
57                try {
58                    return new MainThreadExecutor().submit(new Callable<LauncherAppState>() {
59                        @Override
60                        public LauncherAppState call() throws Exception {
61                            return LauncherAppState.getInstance(context);
62                        }
63                    }).get();
64                } catch (InterruptedException|ExecutionException e) {
65                    throw new RuntimeException(e);
66                }
67            }
68        }
69        return INSTANCE;
70    }
71
72    public static LauncherAppState getInstanceNoCreate() {
73        return INSTANCE;
74    }
75
76    public Context getContext() {
77        return mContext;
78    }
79
80    private LauncherAppState(Context context) {
81        if (getLocalProvider(context) == null) {
82            throw new RuntimeException(
83                    "Initializing LauncherAppState in the absence of LauncherProvider");
84        }
85        Log.v(Launcher.TAG, "LauncherAppState initiated");
86        Preconditions.assertUIThread();
87        mContext = context;
88
89        if (TestingUtils.MEMORY_DUMP_ENABLED) {
90            TestingUtils.startTrackingMemory(mContext);
91        }
92
93        mInvariantDeviceProfile = new InvariantDeviceProfile(mContext);
94        mIconCache = new IconCache(mContext, mInvariantDeviceProfile);
95        mWidgetCache = new WidgetPreviewLoader(mContext, mIconCache);
96
97        mModel = new LauncherModel(this, mIconCache,
98                Utilities.getOverrideObject(AppFilter.class, mContext, R.string.app_filter_class));
99
100        LauncherAppsCompat.getInstance(mContext).addOnAppsChangedCallback(mModel);
101
102        // Register intent receivers
103        IntentFilter filter = new IntentFilter();
104        filter.addAction(Intent.ACTION_LOCALE_CHANGED);
105        // For handling managed profiles
106        filter.addAction(Intent.ACTION_MANAGED_PROFILE_ADDED);
107        filter.addAction(Intent.ACTION_MANAGED_PROFILE_REMOVED);
108        filter.addAction(Intent.ACTION_MANAGED_PROFILE_AVAILABLE);
109        filter.addAction(Intent.ACTION_MANAGED_PROFILE_UNAVAILABLE);
110        filter.addAction(Intent.ACTION_MANAGED_PROFILE_UNLOCKED);
111        // For extracting colors from the wallpaper
112        if (Utilities.ATLEAST_NOUGAT) {
113            // TODO: add a broadcast entry to the manifest for pre-N.
114            filter.addAction(Intent.ACTION_WALLPAPER_CHANGED);
115        }
116
117        mContext.registerReceiver(mModel, filter);
118        UserManagerCompat.getInstance(mContext).enableAndResetCache();
119        new ConfigMonitor(mContext).register();
120
121        ExtractionUtils.startColorExtractionServiceIfNecessary(mContext);
122    }
123
124    /**
125     * Call from Application.onTerminate(), which is not guaranteed to ever be called.
126     */
127    public void onTerminate() {
128        mContext.unregisterReceiver(mModel);
129        final LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(mContext);
130        launcherApps.removeOnAppsChangedCallback(mModel);
131        PackageInstallerCompat.getInstance(mContext).onStop();
132    }
133
134    LauncherModel setLauncher(Launcher launcher) {
135        getLocalProvider(mContext).setLauncherProviderChangeListener(launcher);
136        mModel.initialize(launcher);
137        return mModel;
138    }
139
140    public IconCache getIconCache() {
141        return mIconCache;
142    }
143
144    public LauncherModel getModel() {
145        return mModel;
146    }
147
148    public WidgetPreviewLoader getWidgetCache() {
149        return mWidgetCache;
150    }
151
152    public InvariantDeviceProfile getInvariantDeviceProfile() {
153        return mInvariantDeviceProfile;
154    }
155
156    /**
157     * Shorthand for {@link #getInvariantDeviceProfile()}
158     */
159    public static InvariantDeviceProfile getIDP(Context context) {
160        return LauncherAppState.getInstance(context).getInvariantDeviceProfile();
161    }
162
163    private static LauncherProvider getLocalProvider(Context context) {
164        try (ContentProviderClient cl = context.getContentResolver()
165                .acquireContentProviderClient(LauncherProvider.AUTHORITY)) {
166            return (LauncherProvider) cl.getLocalContentProvider();
167        }
168    }
169}
170