/**
    * This file Copyright (c) 2013-2018 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.ui.admincentral.shellapp.favorites;
  
  import com.vaadin.event.dd.DragAndDropEvent;
  import com.vaadin.event.dd.DropHandler;
  import com.vaadin.event.dd.acceptcriteria.AcceptCriterion;
  import com.vaadin.event.dd.acceptcriteria.ServerSideCriterion;
  import com.vaadin.shared.ui.dd.VerticalDropLocation;
  
  /**
   * Drag&Drop wrapper for the {@link FavoritesEntry}.
   */
  public class EntryDragAndDropWrapper extends AbstractFavoritesDragAndDropWrapper {
  
      public EntryDragAndDropWrapper(FavoritesEntry root, FavoritesView.Listener listener) {
          super(root, listener);
      }
  
      @Override
      protected void init() {
          setDragStartMode(DragStartMode.WRAPPER);
          setSizeUndefined();
  
          setDropHandler(new DropHandler() {
  
              @Override
              public void drop(DragAndDropEvent event) {
                  String sourcePath = ((FavoritesEntry) ((EntryDragAndDropWrapper) event.getTransferable().getSourceComponent()).getWrappedComponent()).getRelPath();
                  WrapperTransferable transferable = (WrapperTransferable) event.getTransferable();
                  WrapperTargetDetails details = (WrapperTargetDetails) event.getTargetDetails();
                  String verticalDropLocation = (String) details.getData("verticalLocation");
                  boolean isDragDown = (details.getMouseEvent().getClientY() - transferable.getMouseDownEvent().getClientY()) > 0;
  
                  if (isDragDown && (verticalDropLocation.equals(VerticalDropLocation.BOTTOM.name()) || verticalDropLocation.equals(VerticalDropLocation.MIDDLE.name()))) {
                      getListener().orderFavoriteAfter(sourcePath, ((FavoritesEntry) getWrappedComponent()).getNodename());
                  } else if (!isDragDown && (verticalDropLocation.equals(VerticalDropLocation.TOP.name()) || verticalDropLocation.equals(VerticalDropLocation.MIDDLE.name()))) {
                      getListener().orderFavoriteBefore(sourcePath, ((FavoritesEntry) getWrappedComponent()).getNodename());
                  }
              }
  
              @Override
              public AcceptCriterion getAcceptCriterion() {
                  return new ServerSideCriterion() {
  
                      @Override
                      public boolean accept(DragAndDropEvent dragEvent) {
                          // accept only entries, not groups
                          AbstractFavoritesDragAndDropWrappera/ui/admincentral/shellapp/favorites/AbstractFavoritesDragAndDropWrapper.html#AbstractFavoritesDragAndDropWrapper">AbstractFavoritesDragAndDropWrapper wrapper = (AbstractFavoritesDragAndDropWrapper) dragEvent.getTransferable().getSourceComponent();
                          if (!(wrapper.getWrappedComponent() instanceof FavoritesEntry)) {
                              return false;
                          }
  
                          // and only in the same group
                          String sourceGroup = ((FavoritesEntry) ((EntryDragAndDropWrapper) dragEvent.getTransferable().getSourceComponent()).getWrappedComponent()).getGroup();
                          if (sourceGroup == null) {
                              return ((FavoritesEntry) getWrappedComponent()).getGroup() == null;
                          }
                          return sourceGroup.equals(((FavoritesEntry) getWrappedComponent()).getGroup());
                      }
                  };
              }
          });
  
      }
  
  }