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      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 
     17 package com.android.launcher3;
     18 
     19 import android.content.ContentProviderClient;
     20 import android.content.Context;
     21 import android.content.Intent;
     22 import android.content.IntentFilter;
     23 import android.os.Looper;
     24 import android.util.Log;
     25 
     26 import com.android.launcher3.compat.LauncherAppsCompat;
     27 import com.android.launcher3.compat.PackageInstallerCompat;
     28 import com.android.launcher3.compat.UserManagerCompat;
     29 import com.android.launcher3.config.ProviderConfig;
     30 import com.android.launcher3.dynamicui.ExtractionUtils;
     31 import com.android.launcher3.util.ConfigMonitor;
     32 import com.android.launcher3.util.Preconditions;
     33 import com.android.launcher3.util.TestingUtils;
     34 
     35 import java.util.concurrent.Callable;
     36 import java.util.concurrent.ExecutionException;
     37 
     38 public 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