content: /*
   * Copyright (C) 2008 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.content.BroadcastReceiver;
  import android.content.ContentResolver;
  import android.content.Context;
  import android.content.Intent;
  import android.database.Cursor;
  import android.net.Uri;
  import android.widget.Toast;
  import java.net.URISyntaxException;
  import java.util.ArrayList;
  import java.util.Iterator;
  import com.lb.launcher.R;
  
  public class UninstallShortcutReceiver extends BroadcastReceiver {
      private static final String ACTION_UNINSTALL_SHORTCUT =
              "com.android.launcher.action.UNINSTALL_SHORTCUT";
  
      // The set of shortcuts that are pending uninstall
      private static ArrayList<PendingUninstallShortcutInfo> mUninstallQueue =
              new ArrayList<PendingUninstallShortcutInfo>();
  
      // Determines whether to defer uninstalling shortcuts immediately until
      // disableAndFlushUninstallQueue() is called.
      private static boolean mUseUninstallQueue = false;
  
      private static class PendingUninstallShortcutInfo {
          Intent data;
  
          public PendingUninstallShortcutInfo(Intent rawData) {
              data = rawData;
          }
      }
  
      public void onReceive(Context context, Intent data) {
          if (!ACTION_UNINSTALL_SHORTCUT.equals(data.getAction())) {
              return;
          }
  
          PendingUninstallShortcutInfo info = new PendingUninstallShortcutInfo(data);
          if (mUseUninstallQueue) {
              mUninstallQueue.add(info);
          } else {
              processUninstallShortcut(context, info);
          }
      }
  
      static void enableUninstallQueue() {
          mUseUninstallQueue = true;
      }
  
      static void disableAndFlushUninstallQueue(Context context) {
          mUseUninstallQueue = false;
          Iterator<PendingUninstallShortcutInfo> iter = mUninstallQueue.iterator();
          while (iter.hasNext()) {
              processUninstallShortcut(context, iter.next());
              iter.remove();
          }
      }
  
      private static void processUninstallShortcut(Context context,
              PendingUninstallShortcutInfo pendingInfo) {
          final Intent data = pendingInfo.data;
  
          LauncherAppState.setApplicationContext(context.getApplicationContext());
          LauncherAppState app = LauncherAppState.getInstance();
          synchronized (app) { // TODO: make removeShortcut internally threadsafe
              removeShortcut(context, data);
          }
      }
  
      private static void removeShortcut(Context context, Intent data) {
          Intent intent = data.getParcelableExtra(Intent.EXTRA_SHORTCUT_INTENT);
          String name = data.getStringExtra(Intent.EXTRA_SHORTCUT_NAME);
          boolean duplicate = data.getBooleanExtra(Launcher.EXTRA_SHORTCUT_DUPLICATE, true);
  
          if (intent != null && name != null) {
              final ContentResolver cr = context.getContentResolver();
              Cursor c = cr.query(LauncherSettings.Favorites.CONTENT_URI,
                  new String[] { LauncherSettings.Favorites._ID, LauncherSettings.Favorites.INTENT },
                  LauncherSettings.Favorites.TITLE + "=?", new String[] { name }, null);
  
              final int intentIndex = c.getColumnIndexOrThrow(LauncherSettings.Favorites.INTENT);
              final int idIndex = c.getColumnIndexOrThrow(LauncherSettings.Favorites._ID);
  
              boolean changed = false;
  
              try {
                  while (c.moveToNext()) {
                      try {
                          if (intent.filterEquals(Intent.parseUri(c.getString(intentIndex), 0))) {
                              final long id = c.getLong(idIndex);
                              final Uri uri = LauncherSettings.Favorites.getContentUri(id, false);
                              cr.delete(uri, null, null);
                              changed = true;
                              if (!duplicate) {
                                  break;
                              }
                          }
                      } catch (URISyntaxException e) {
                          // Ignore
                      }
                  }
              } finally {
                  c.close();
              }
  
              if (changed) {
                  cr.notifyChange(LauncherSettings.Favorites.CONTENT_URI, null);
                  Toast.makeText(context, context.getString(R.string.shortcut_uninstalled, name),
                          Toast.LENGTH_SHORT).show();
              }
          }
      }
  }
  