content: /*
   * This library is part of OpenCms -
   * the Open Source Content Management System
   *
   * Copyright (c) Alkacon Software GmbH & Co. KG (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.ui.contextmenu;
  
  import org.opencms.file.CmsObject;
  import org.opencms.file.CmsResource;
  import org.opencms.ui.I_CmsDialogContext;
  
  import java.util.List;
  
  /**
   * Decorator for menu item visibility classes which always returns INVISIBLE if more than one resource
   * is passed, but otherwise delegates the decision to its wrapped instance.<p>
   */
  public class CmsMenuItemVisibilitySingleOnly implements I_CmsHasMenuItemVisibility {
  
      /** The wrapped instance to delegate to. */
      private I_CmsHasMenuItemVisibility m_visibility;
  
      /**
       * Creates a new instance wrapping the given visibility handler.<p>
       *
       * @param visibility the wrapped visibility handler
       */
      public CmsMenuItemVisibilitySingleOnly(I_CmsHasMenuItemVisibility visibility) {
          m_visibility = visibility;
      }
  
      /**
       * @see org.opencms.ui.contextmenu.I_CmsHasMenuItemVisibility#getVisibility(org.opencms.file.CmsObject, java.util.List)
       */
      public CmsMenuItemVisibilityMode getVisibility(CmsObject cms, List<CmsResource> resources) {
  
          if (resources.size() != 1) {
              return CmsMenuItemVisibilityMode.VISIBILITY_INVISIBLE;
          }
          return m_visibility.getVisibility(cms, resources);
      }
  
      /**
       * @see org.opencms.ui.contextmenu.I_CmsHasMenuItemVisibility#getVisibility(org.opencms.ui.I_CmsDialogContext)
       */
      public CmsMenuItemVisibilityMode getVisibility(I_CmsDialogContext context) {
  
          return getVisibility(context.getCms(), context.getResources());
      }
  }
  