content: /*
   * Copyright (C) 2013 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.lb.launcher;
  
  import android.annotation.TargetApi;
  import android.app.SearchManager;
  import android.content.ComponentName;
  import android.content.ContentResolver;
  import android.content.Context;
  import android.content.Intent;
  import android.content.IntentFilter;
  import android.content.res.Configuration;
  import android.content.res.Resources;
  import android.database.ContentObserver;
  import android.graphics.Point;
  import android.os.Build;
  import android.os.Handler;
  import android.util.DisplayMetrics;
  import android.util.Log;
  import android.view.Display;
  import android.view.WindowManager;
  import com.lb.launcher.R;
  import com.lb.launcher.compat.LauncherAppsCompat;
  import com.lb.launcher.compat.PackageInstallerCompat;
  import com.lb.launcher.compat.PackageInstallerCompat.PackageInstallInfo;
  import java.lang.ref.WeakReference;
  import java.util.ArrayList;
  
  public class LauncherAppState implements DeviceProfile.DeviceProfileCallbacks {
      private static final String TAG = "LauncherAppState";
  
      private static final boolean DEBUG = false;
  
      private final AppFilter mAppFilter;
      private final BuildInfo mBuildInfo;
      private final LauncherModel mModel;
      private final IconCache mIconCache;
  
      private final boolean mIsScreenLarge;
      private final float mScreenDensity;
      private final int mLongPressTimeout = 300;
  
      private WidgetPreviewLoader.CacheDb mWidgetPreviewCacheDb;
      private boolean mWallpaperChangedSinceLastCheck;
  
      private static WeakReference<LauncherProvider> sLauncherProvider;
      private static Context sContext;
  
      private static LauncherAppState INSTANCE;
  
      private DynamicGrid mDynamicGrid;
  
      public static LauncherAppState getInstance() {
          if (INSTANCE == null) {
              INSTANCE = new LauncherAppState();
          }
          return INSTANCE;
      }
  
      public static LauncherAppState getInstanceNoCreate() {
          return INSTANCE;
      }
  
      public Context getContext() {
          return sContext;
      }
  
      public static void setApplicationContext(Context context) {
          if (sContext != null) {
              Log.w(Launcher.TAG, "setApplicationContext called twice! old=" + sContext + " new=" + context);
          }
          sContext = context.getApplicationContext();
      }
  
      private LauncherAppState() {
          if (sContext == null) {
              throw new IllegalStateException("LauncherAppState inited before app context set");
          }
  
          Log.v(Launcher.TAG, "LauncherAppState inited");
  
          if (sContext.getResources().getBoolean(R.bool.debug_memory_enabled)) {
              MemoryTracker.startTrackingMe(sContext, "L");
          }
  
          // set sIsScreenXLarge and mScreenDensity *before* creating icon cache
          mIsScreenLarge = isScreenLarge(sContext.getResources());
          mScreenDensity = sContext.getResources().getDisplayMetrics().density;
  
          recreateWidgetPreviewDb();
          mIconCache = new IconCache(sContext);
  
          mAppFilter = AppFilter.loadByName(sContext.getString(R.string.app_filter_class));
          mBuildInfo = BuildInfo.loadByName(sContext.getString(R.string.build_info_class));
          mModel = new LauncherModel(this, mIconCache, mAppFilter);
          final LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(sContext);
          launcherApps.addOnAppsChangedCallback(mModel);
  
          // Register intent receivers
          IntentFilter filter = new IntentFilter();
          filter.addAction(Intent.ACTION_LOCALE_CHANGED);
          filter.addAction(Intent.ACTION_CONFIGURATION_CHANGED);
          sContext.registerReceiver(mModel, filter);
          filter = new IntentFilter();
          filter.addAction(SearchManager.INTENT_GLOBAL_SEARCH_ACTIVITY_CHANGED);
          sContext.registerReceiver(mModel, filter);
          filter = new IntentFilter();
          filter.addAction(SearchManager.INTENT_ACTION_SEARCHABLES_CHANGED);
          sContext.registerReceiver(mModel, filter);
  
          // Register for changes to the favorites
          ContentResolver resolver = sContext.getContentResolver();
          resolver.registerContentObserver(LauncherSettings.Favorites.CONTENT_URI, true,
                  mFavoritesObserver);
      }
  
      public void recreateWidgetPreviewDb() {
          if (mWidgetPreviewCacheDb != null) {
              mWidgetPreviewCacheDb.close();
          }
          mWidgetPreviewCacheDb = new WidgetPreviewLoader.CacheDb(sContext);
      }
  
      /**
       * Call from Application.onTerminate(), which is not guaranteed to ever be called.
       */
      public void onTerminate() {
          sContext.unregisterReceiver(mModel);
          final LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(sContext);
          launcherApps.removeOnAppsChangedCallback(mModel);
          PackageInstallerCompat.getInstance(sContext).onStop();
  
          ContentResolver resolver = sContext.getContentResolver();
          resolver.unregisterContentObserver(mFavoritesObserver);
      }
  
      /**
       * Receives notifications whenever the user favorites have changed.
       */
      private final ContentObserver mFavoritesObserver = new ContentObserver(new Handler()) {
          @Override
          public void onChange(boolean selfChange) {
              // If the database has ever changed, then we really need to force a reload of the
              // workspace on the next load
              mModel.resetLoadedState(false, true);
              mModel.startLoaderFromBackground();
          }
      };
  
      LauncherModel setLauncher(Launcher launcher) {
          mModel.initialize(launcher);
          return mModel;
      }
  
      public IconCache getIconCache() {
          return mIconCache;
      }
  
      LauncherModel getModel() {
          return mModel;
      }
  
      boolean shouldShowAppOrWidgetProvider(ComponentName componentName) {
          return mAppFilter == null || mAppFilter.shouldShowApp(componentName);
      }
  
      WidgetPreviewLoader.CacheDb getWidgetPreviewCacheDb() {
          return mWidgetPreviewCacheDb;
      }
  
      static void setLauncherProvider(LauncherProvider provider) {
          sLauncherProvider = new WeakReference<LauncherProvider>(provider);
      }
  
      static LauncherProvider getLauncherProvider() {
          return sLauncherProvider.get();
      }
  
      public static String getSharedPreferencesKey() {
          return LauncherFiles.SHARED_PREFERENCES_KEY;
      }
  
      @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
      DeviceProfile initDynamicGrid(Context context) {
          mDynamicGrid = createDynamicGrid(context, mDynamicGrid);
          mDynamicGrid.getDeviceProfile().addCallback(this);
          return mDynamicGrid.getDeviceProfile();
      }
  
      @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
      static DynamicGrid createDynamicGrid(Context context, DynamicGrid dynamicGrid) {
          // Determine the dynamic grid properties
          WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
          Display display = wm.getDefaultDisplay();
  
          Point realSize = new Point();
          display.getRealSize(realSize);
          DisplayMetrics dm = new DisplayMetrics();
          display.getMetrics(dm);
  
          if (dynamicGrid == null) {
              Point smallestSize = new Point();
              Point largestSize = new Point();
              display.getCurrentSizeRange(smallestSize, largestSize);
  
              dynamicGrid = new DynamicGrid(context,
                      context.getResources(),
                      Math.min(smallestSize.x, smallestSize.y),
                      Math.min(largestSize.x, largestSize.y),
                      realSize.x, realSize.y,
                      dm.widthPixels, dm.heightPixels);
          }
  
          // Update the icon size
          DeviceProfile grid = dynamicGrid.getDeviceProfile();
          grid.updateFromConfiguration(context, context.getResources(),
                  realSize.x, realSize.y,
                  dm.widthPixels, dm.heightPixels);
          return dynamicGrid;
      }
  
      public DynamicGrid getDynamicGrid() {
          return mDynamicGrid;
      }
  
      public boolean isScreenLarge() {
          return mIsScreenLarge;
      }
  
      // Need a version that doesn't require an instance of LauncherAppState for the wallpaper picker
      public static boolean isScreenLarge(Resources res) {
          return res.getBoolean(R.bool.is_large_tablet);
      }
  
      public static boolean isScreenLandscape(Context context) {
          return context.getResources().getConfiguration().orientation ==
              Configuration.ORIENTATION_LANDSCAPE;
      }
  
      public float getScreenDensity() {
          return mScreenDensity;
      }
  
      public int getLongPressTimeout() {
          return mLongPressTimeout;
      }
  
      public void onWallpaperChanged() {
          mWallpaperChangedSinceLastCheck = true;
      }
  
      public boolean hasWallpaperChangedSinceLastCheck() {
          boolean result = mWallpaperChangedSinceLastCheck;
          mWallpaperChangedSinceLastCheck = false;
          return result;
      }
  
      @Override
      public void onAvailableSizeChanged(DeviceProfile grid) {
          Utilities.setIconSize(grid.iconSizePx);
      }
  
      public static boolean isDisableAllApps() {
          // Returns false on non-dogfood builds.
          return getInstance().mBuildInfo.isDogfoodBuild() &&
                  Utilities.isPropertyEnabled(Launcher.DISABLE_ALL_APPS_PROPERTY);
      }
  
      public static boolean isDogfoodBuild() {
          return getInstance().mBuildInfo.isDogfoodBuild();
      }
  
      public void setPackageState(ArrayList<PackageInstallInfo> installInfo) {
          mModel.setPackageState(installInfo);
      }
  
      /**
       * Updates the icons and label of all icons for the provided package name.
       */
      public void updatePackageBadge(String packageName) {
          mModel.updatePackageBadge(packageName);
      }
  }
  