content: /*
   * Copyright (C) 2011 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.content.Context;
  import android.text.TextUtils;
  import android.util.AttributeSet;
  import android.view.View;
  
  import com.android.launcher3.dragndrop.DragOptions;
  import com.android.launcher3.folder.Folder;
  
  public class DeleteDropTarget extends ButtonDropTarget {
  
      public DeleteDropTarget(Context context, AttributeSet attrs) {
          this(context, attrs, 0);
      }
  
      public DeleteDropTarget(Context context, AttributeSet attrs, int defStyle) {
          super(context, attrs, defStyle);
      }
  
      @Override
      protected void onFinishInflate() {
          super.onFinishInflate();
          // Get the hover color
          mHoverColor = getResources().getColor(R.color.delete_target_hover_tint);
  
          setDrawable(R.drawable.ic_remove_shadow);
      }
  
      @Override
      public void onDragStart(DropTarget.DragObject dragObject, DragOptions options) {
          super.onDragStart(dragObject, options);
          setTextBasedOnDragSource(dragObject.dragSource);
      }
  
      /** @return true for items that should have a "Remove" action in accessibility. */
      public static boolean supportsAccessibleDrop(ItemInfo info) {
          return (info instanceof ShortcutInfo)
                  || (info instanceof LauncherAppWidgetInfo)
                  || (info instanceof FolderInfo);
      }
  
      @Override
      protected boolean supportsDrop(DragSource source, ItemInfo info) {
          return true;
      }
  
      /**
       * Set the drop target's text to either "Remove" or "Cancel" depending on the drag source.
       */
      public void setTextBasedOnDragSource(DragSource dragSource) {
          if (!TextUtils.isEmpty(mText)) {
              mText = getResources().getString(dragSource.supportsDeleteDropTarget()
                      ? R.string.remove_drop_target_label
                      : android.R.string.cancel);
              requestLayout();
          }
      }
  
      @Override
      public void completeDrop(DragObject d) {
          ItemInfo item = d.dragInfo;
          if ((d.dragSource instanceof Workspace) || (d.dragSource instanceof Folder)) {
              removeWorkspaceOrFolderItem(mLauncher, item, null);
          }
      }
  
      /**
       * Removes the item from the workspace. If the view is not null, it also removes the view.
       */
      public static void removeWorkspaceOrFolderItem(Launcher launcher, ItemInfo item, View view) {
          // Remove the item from launcher and the db, we can ignore the containerInfo in this call
          // because we already remove the drag view from the folder (if the drag originated from
          // a folder) in Folder.beginDrag()
          launcher.removeItem(view, item, true /* deleteFromDb */);
          launcher.getWorkspace().stripEmptyScreens();
          launcher.getDragLayer().announceForAccessibility(launcher.getString(R.string.item_removed));
      }
  }
  