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.android.launcher3;
  
  import android.os.Process;
  
  import com.android.launcher3.model.ModelWriter;
  import com.android.launcher3.util.ContentWriter;
  
  import java.util.ArrayList;
  
  /**
   * Represents a folder containing shortcuts or apps.
   */
  public class FolderInfo extends ItemInfo {
  
      public static final int NO_FLAGS = 0x00000000;
  
      /**
       * The folder is locked in sorted mode
       */
      public static final int FLAG_ITEMS_SORTED = 0x00000001;
  
      /**
       * It is a work folder
       */
      public static final int FLAG_WORK_FOLDER = 0x00000002;
  
      /**
       * The multi-page animation has run for this folder
       */
      public static final int FLAG_MULTI_PAGE_ANIMATION = 0x00000004;
  
      public int options;
  
      /**
       * The apps and shortcuts
       */
      public ArrayList<ShortcutInfo> contents = new ArrayList<ShortcutInfo>();
  
      ArrayList<FolderListener> listeners = new ArrayList<FolderListener>();
  
      public FolderInfo() {
          itemType = LauncherSettings.Favorites.ITEM_TYPE_FOLDER;
          user = Process.myUserHandle();
      }
  
      /**
       * Add an app or shortcut
       *
       * @param item
       */
      public void add(ShortcutInfo item, boolean animate) {
          add(item, contents.size(), animate);
      }
  
      /**
       * Add an app or shortcut for a specified rank.
       */
      public void add(ShortcutInfo item, int rank, boolean animate) {
          rank = Utilities.boundToRange(rank, 0, contents.size());
          contents.add(rank, item);
          for (int i = 0; i < listeners.size(); i++) {
              listeners.get(i).onAdd(item, rank);
          }
          itemsChanged(animate);
      }
  
      /**
       * Remove an app or shortcut. Does not change the DB.
       *
       * @param item
       */
      public void remove(ShortcutInfo item, boolean animate) {
          contents.remove(item);
          for (int i = 0; i < listeners.size(); i++) {
              listeners.get(i).onRemove(item);
          }
          itemsChanged(animate);
      }
  
      public void setTitle(CharSequence title) {
          this.title = title;
          for (int i = 0; i < listeners.size(); i++) {
              listeners.get(i).onTitleChanged(title);
          }
      }
  
      @Override
      public void onAddToDatabase(ContentWriter writer) {
          super.onAddToDatabase(writer);
          writer.put(LauncherSettings.Favorites.TITLE, title)
                  .put(LauncherSettings.Favorites.OPTIONS, options);
  
      }
  
      public void addListener(FolderListener listener) {
          listeners.add(listener);
      }
  
      public void removeListener(FolderListener listener) {
          listeners.remove(listener);
      }
  
      public void itemsChanged(boolean animate) {
          for (int i = 0; i < listeners.size(); i++) {
              listeners.get(i).onItemsChanged(animate);
          }
      }
  
      public void prepareAutoUpdate() {
          for (int i = 0; i < listeners.size(); i++) {
              listeners.get(i).prepareAutoUpdate();
          }
      }
  
      public interface FolderListener {
          public void onAdd(ShortcutInfo item, int rank);
          public void onRemove(ShortcutInfo item);
          public void onTitleChanged(CharSequence title);
          public void onItemsChanged(boolean animate);
          public void prepareAutoUpdate();
      }
  
      public boolean hasOption(int optionFlag) {
          return (options & optionFlag) != 0;
      }
  
      /**
       * @param option flag to set or clear
       * @param isEnabled whether to set or clear the flag
       * @param writer if not null, save changes to the db.
       */
      public void setOption(int option, boolean isEnabled, ModelWriter writer) {
          int oldOptions = options;
          if (isEnabled) {
              options |= option;
          } else {
              options &= ~option;
          }
          if (writer != null && oldOptions != options) {
              writer.updateItemInDatabase(this);
          }
      }
  }
  