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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.app.SearchManager;
     20 import android.content.Context;
     21 import android.content.Intent;
     22 import android.content.IntentFilter;
     23 import android.util.Log;
     24 
     25 import com.android.launcher3.accessibility.LauncherAccessibilityDelegate;
     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.FeatureFlags;
     30 import com.android.launcher3.util.ConfigMonitor;
     31 import com.android.launcher3.util.TestingUtils;
     32 import com.android.launcher3.util.Thunk;
     33 
     34 import java.lang.ref.WeakReference;
     35 
     36 public class LauncherAppState {
     37 
     38     private final AppFilter mAppFilter;
     39     @Thunk final LauncherModel mModel;
     40     private final IconCache mIconCache;
     41     private final WidgetPreviewLoader mWidgetCache;
     42 
     43     private boolean mWallpaperChangedSinceLastCheck;
     44 
     45     private static WeakReference<LauncherProvider> sLauncherProvider;
     46     private static Context sContext;
     47 
     48     private static LauncherAppState INSTANCE;
     49 
     50     private InvariantDeviceProfile mInvariantDeviceProfile;
     51 
     52     private LauncherAccessibilityDelegate mAccessibilityDelegate;
     53 
     54     public static LauncherAppState getInstance() {
     55         if (INSTANCE == null) {
     56             INSTANCE = new LauncherAppState();
     57         }
     58         return INSTANCE;
     59     }
     60 
     61     public static LauncherAppState getInstanceNoCreate() {
     62         return INSTANCE;
     63     }
     64 
     65     public Context getContext() {
     66         return sContext;
     67     }
     68 
     69     public static void setApplicationContext(Context context) {
     70         if (sContext != null) {
     71             Log.w(Launcher.TAG, "setApplicationContext called twice! old=" + sContext + " new=" + context);
     72         }
     73         sContext = context.getApplicationContext();
     74     }
     75 
     76     private LauncherAppState() {
     77         if (sContext == null) {
     78             throw new IllegalStateException("LauncherAppState inited before app context set");
     79         }
     80 
     81         Log.v(Launcher.TAG, "LauncherAppState inited");
     82 
     83         if (TestingUtils.MEMORY_DUMP_ENABLED) {
     84             TestingUtils.startTrackingMemory(sContext);
     85         }
     86 
     87         mInvariantDeviceProfile = new InvariantDeviceProfile(sContext);
     88         mIconCache = new IconCache(sContext, mInvariantDeviceProfile);
     89         mWidgetCache = new WidgetPreviewLoader(sContext, mIconCache);
     90 
     91         mAppFilter = AppFilter.loadByName(sContext.getString(R.string.app_filter_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         filter.addAction(LauncherAppsCompat.ACTION_MANAGED_PROFILE_AVAILABLE);
    104         filter.addAction(LauncherAppsCompat.ACTION_MANAGED_PROFILE_UNAVAILABLE);
    105 
    106         sContext.registerReceiver(mModel, filter);
    107         UserManagerCompat.getInstance(sContext).enableAndResetCache();
    108         new ConfigMonitor(sContext).register();
    109 
    110         sContext.registerReceiver(
    111                 new WallpaperChangedReceiver(), new IntentFilter(Intent.ACTION_WALLPAPER_CHANGED));
    112     }
    113 
    114     /**
    115      * Call from Application.onTerminate(), which is not guaranteed to ever be called.
    116      */
    117     public void onTerminate() {
    118         sContext.unregisterReceiver(mModel);
    119         final LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(sContext);
    120         launcherApps.removeOnAppsChangedCallback(mModel);
    121         PackageInstallerCompat.getInstance(sContext).onStop();
    122     }
    123 
    124     /**
    125      * Reloads the workspace items from the DB and re-binds the workspace. This should generally
    126      * not be called as DB updates are automatically followed by UI update
    127      */
    128     public void reloadWorkspace() {
    129         mModel.resetLoadedState(false, true);
    130         mModel.startLoaderFromBackground();
    131     }
    132 
    133     LauncherModel setLauncher(Launcher launcher) {
    134         getLauncherProvider().setLauncherProviderChangeListener(launcher);
    135         mModel.initialize(launcher);
    136         mAccessibilityDelegate = ((launcher != null) && Utilities.ATLEAST_LOLLIPOP) ?
    137             new LauncherAccessibilityDelegate(launcher) : null;
    138         return mModel;
    139     }
    140 
    141     public LauncherAccessibilityDelegate getAccessibilityDelegate() {
    142         return mAccessibilityDelegate;
    143     }
    144 
    145     public IconCache getIconCache() {
    146         return mIconCache;
    147     }
    148 
    149     public LauncherModel getModel() {
    150         return mModel;
    151     }
    152 
    153     static void setLauncherProvider(LauncherProvider provider) {
    154         sLauncherProvider = new WeakReference<LauncherProvider>(provider);
    155     }
    156 
    157     public static LauncherProvider getLauncherProvider() {
    158         return sLauncherProvider.get();
    159     }
    160 
    161     public WidgetPreviewLoader getWidgetCache() {
    162         return mWidgetCache;
    163     }
    164 
    165     public void onWallpaperChanged() {
    166         mWallpaperChangedSinceLastCheck = true;
    167     }
    168 
    169     public boolean hasWallpaperChangedSinceLastCheck() {
    170         boolean result = mWallpaperChangedSinceLastCheck;
    171         mWallpaperChangedSinceLastCheck = false;
    172         return result;
    173     }
    174 
    175     public InvariantDeviceProfile getInvariantDeviceProfile() {
    176         return mInvariantDeviceProfile;
    177     }
    178 
    179     public static boolean isDogfoodBuild() {
    180         return FeatureFlags.IS_ALPHA_BUILD || FeatureFlags.IS_DEV_BUILD;
    181     }
    182 }
    183