content: /*
   * This library is part of OpenCms -
   * the Open Source Content Management System
   *
   * Copyright (C) Alkacon Software (https://www.alkacon.com)
   *
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
   * Lesser General Public License for more details.
   *
   * For further information about Alkacon Software, please see the
   * company website: https://www.alkacon.com
   *
   * For further information about OpenCms, please see the
   * project website: https://www.opencms.org
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   */
  
  package org.opencms.gwt.client.dnd;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import com.google.web.bindery.event.shared.HandlerRegistration;
  
  /**
   * A DND controller which forwards method calls to multiple other DND controllers.<p>
   */
  public class CmsCompositeDNDController implements I_CmsDNDController {
  
      /** The list of internal controllers. */
      List<I_CmsDNDController> m_controllers = new ArrayList<I_CmsDNDController>();
  
      /**
       * Adds another sub-controller to this controller.<p>
       *
       * @param controller the controller to add
       *
       * @return a registration object to remove the controller later
       */
      public HandlerRegistration addController(final I_CmsDNDController controller) {
  
          m_controllers.add(controller);
          return new HandlerRegistration() {
  
              public void removeHandler() {
  
                  m_controllers.remove(controller);
              }
          };
      }
  
  
      /**
       * @see org.opencms.gwt.client.dnd.I_CmsDNDController#onAnimationStart(org.opencms.gwt.client.dnd.I_CmsDraggable, org.opencms.gwt.client.dnd.I_CmsDropTarget, org.opencms.gwt.client.dnd.CmsDNDHandler)
       */
      public void onAnimationStart(I_CmsDraggable draggable, I_CmsDropTarget target, CmsDNDHandler handler) {
  
          for (I_CmsDNDController controller : m_controllers) {
              controller.onAnimationStart(draggable, target, handler);
          }
      }
  
      /**
       * @see org.opencms.gwt.client.dnd.I_CmsDNDController#onBeforeDrop(org.opencms.gwt.client.dnd.I_CmsDraggable, org.opencms.gwt.client.dnd.I_CmsDropTarget, org.opencms.gwt.client.dnd.CmsDNDHandler)
       */
      public boolean onBeforeDrop(I_CmsDraggable draggable, I_CmsDropTarget target, CmsDNDHandler handler) {
  
          boolean result = true;
          for (I_CmsDNDController controller : m_controllers) {
              result &= controller.onBeforeDrop(draggable, target, handler);
          }
          return result;
      }
  
      /**
       * @see org.opencms.gwt.client.dnd.I_CmsDNDController#onDragCancel(org.opencms.gwt.client.dnd.I_CmsDraggable, org.opencms.gwt.client.dnd.I_CmsDropTarget, org.opencms.gwt.client.dnd.CmsDNDHandler)
       */
      public void onDragCancel(I_CmsDraggable draggable, I_CmsDropTarget target, CmsDNDHandler handler) {
  
          for (I_CmsDNDController controller : m_controllers) {
              controller.onDragCancel(draggable, target, handler);
          }
      }
  
      /**
       * @see org.opencms.gwt.client.dnd.I_CmsDNDController#onDragStart(org.opencms.gwt.client.dnd.I_CmsDraggable, org.opencms.gwt.client.dnd.I_CmsDropTarget, org.opencms.gwt.client.dnd.CmsDNDHandler)
       */
      public boolean onDragStart(I_CmsDraggable draggable, I_CmsDropTarget target, CmsDNDHandler handler) {
  
          boolean result = true;
          for (I_CmsDNDController controller : m_controllers) {
              result &= controller.onDragStart(draggable, target, handler);
          }
          return result;
      }
  
      /**
       * @see org.opencms.gwt.client.dnd.I_CmsDNDController#onDrop(org.opencms.gwt.client.dnd.I_CmsDraggable, org.opencms.gwt.client.dnd.I_CmsDropTarget, org.opencms.gwt.client.dnd.CmsDNDHandler)
       */
      public void onDrop(I_CmsDraggable draggable, I_CmsDropTarget target, CmsDNDHandler handler) {
  
          for (I_CmsDNDController controller : m_controllers) {
              controller.onDrop(draggable, target, handler);
          }
      }
  
      /**
       * @see org.opencms.gwt.client.dnd.I_CmsDNDController#onPositionedPlaceholder(org.opencms.gwt.client.dnd.I_CmsDraggable, org.opencms.gwt.client.dnd.I_CmsDropTarget, org.opencms.gwt.client.dnd.CmsDNDHandler)
       */
      public void onPositionedPlaceholder(I_CmsDraggable draggable, I_CmsDropTarget target, CmsDNDHandler handler) {
  
          for (I_CmsDNDController controller : m_controllers) {
              controller.onPositionedPlaceholder(draggable, target, handler);
          }
      }
  
      /**
       * @see org.opencms.gwt.client.dnd.I_CmsDNDController#onTargetEnter(org.opencms.gwt.client.dnd.I_CmsDraggable, org.opencms.gwt.client.dnd.I_CmsDropTarget, org.opencms.gwt.client.dnd.CmsDNDHandler)
       */
      public boolean onTargetEnter(I_CmsDraggable draggable, I_CmsDropTarget target, CmsDNDHandler handler) {
  
          boolean result = true;
          for (I_CmsDNDController controller : m_controllers) {
              result &= controller.onTargetEnter(draggable, target, handler);
          }
          return result;
      }
  
      /**
       * @see org.opencms.gwt.client.dnd.I_CmsDNDController#onTargetLeave(org.opencms.gwt.client.dnd.I_CmsDraggable, org.opencms.gwt.client.dnd.I_CmsDropTarget, org.opencms.gwt.client.dnd.CmsDNDHandler)
       */
      public void onTargetLeave(I_CmsDraggable draggable, I_CmsDropTarget target, CmsDNDHandler handler) {
  
          for (I_CmsDNDController controller : m_controllers) {
              controller.onTargetLeave(draggable, target, handler);
          }
      }
  
      /**
       * @see org.opencms.gwt.client.dnd.I_CmsDNDController#postClear(org.opencms.gwt.client.dnd.I_CmsDraggable, org.opencms.gwt.client.dnd.I_CmsDropTarget)
       */
      @Override
      public void postClear(I_CmsDraggable draggable, I_CmsDropTarget target) {
          m_controllers.forEach(controller -> {
              controller.postClear(draggable, target);
  
          });
      }
  
      /**
       * @see org.opencms.gwt.client.dnd.I_CmsDNDController#startPlacementMode(org.opencms.gwt.client.dnd.I_CmsDraggable, org.opencms.gwt.client.dnd.CmsDNDHandler)
       */
      @Override
      public boolean startPlacementMode(I_CmsDraggable draggable, CmsDNDHandler handler) {
          for (I_CmsDNDController controller: m_controllers) {
              if (controller.startPlacementMode(draggable, handler)) {
                  return true;
              }
          }
          return false;
      }
  
  }
  