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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.ComponentName;
     21 import android.content.Context;
     22 import android.content.Intent;
     23 import android.content.IntentFilter;
     24 import android.util.Log;
     25 
     26 import com.android.launcher3.accessibility.LauncherAccessibilityDelegate;
     27 import com.android.launcher3.compat.LauncherAppsCompat;
     28 import com.android.launcher3.compat.PackageInstallerCompat;
     29 import com.android.launcher3.util.Thunk;
     30 
     31 import java.lang.ref.WeakReference;
     32 
     33 public 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     static void setLauncherProvider(LauncherProvider provider) {
    147         sLauncherProvider = new WeakReference<LauncherProvider>(provider);
    148     }
    149 
    150     static LauncherProvider getLauncherProvider() {
    151         return sLauncherProvider.get();
    152     }
    153 
    154     public static String getSharedPreferencesKey() {
    155         return LauncherFiles.SHARED_PREFERENCES_KEY;
    156     }
    157 
    158     public WidgetPreviewLoader getWidgetCache() {
    159         return mWidgetCache;
    160     }
    161 
    162     public void onWallpaperChanged() {
    163         mWallpaperChangedSinceLastCheck = true;
    164     }
    165 
    166     public boolean hasWallpaperChangedSinceLastCheck() {
    167         boolean result = mWallpaperChangedSinceLastCheck;
    168         mWallpaperChangedSinceLastCheck = false;
    169         return result;
    170     }
    171 
    172     public InvariantDeviceProfile getInvariantDeviceProfile() {
    173         return mInvariantDeviceProfile;
    174     }
    175 
    176     public static boolean isDogfoodBuild() {
    177         return getInstance().mBuildInfo.isDogfoodBuild();
    178     }
    179 }
    180