/**
    * This file Copyright (c) 2011 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.templating.editor.client.model;
  
  import info.magnolia.templating.editor.client.AbstractBarWidget;
  import info.magnolia.templating.editor.client.AbstractOverlayWidget;
  import info.magnolia.templating.editor.client.dom.MgnlElement;
  import info.magnolia.templating.editor.client.model.focus.FocusModel;
  import info.magnolia.templating.editor.client.model.focus.FocusModelImpl3;
  
  import java.util.HashMap;
  import java.util.LinkedList;
  import java.util.List;
  import java.util.Map;
  
  import com.google.gwt.dom.client.Element;
  
  /**
   * Singleton keeping the model.
   */
  public class ModelStorage {
  
      private static ModelStorage storage = null;
  
      private FocusModel focusModel = new FocusModelImpl3(this);
  
      private Map<MgnlElement, AbstractBarWidget> editBars = new HashMap<MgnlElement, AbstractBarWidget>();
      private Map<MgnlElement, AbstractOverlayWidget> overlays = new HashMap<MgnlElement, AbstractOverlayWidget>();
      private Map<MgnlElement, List<Element>> elements = new HashMap<MgnlElement, List<Element>>();
      private Map<Element, MgnlElement> mgnlElements = new HashMap<Element, MgnlElement>();
  
  
      public List<MgnlElement> rootElements = new LinkedList<MgnlElement>();
  
  
      private MgnlElement selectedMgnlElement = null;
  
      public static ModelStorage getInstance() {
          if (storage == null) {
              storage = new ModelStorage();
          }
          return storage;
      }
  
      public void addOverlay(MgnlElement mgnlElement, AbstractOverlayWidget overlayWidget) {
          overlays.put(mgnlElement, overlayWidget);
      }
  
      public AbstractOverlayWidget getOverlay(MgnlElement mgnlElement) {
          return overlays.get(mgnlElement);
      }
  
      public void addEditBar(MgnlElement mgnlElement, AbstractBarWidget editBar) {
          editBars.put(mgnlElement, editBar);
      }
  
      public AbstractBarWidget getEditBar(MgnlElement mgnlElement) {
          return editBars.get(mgnlElement);
      }
  
      public void addElement(MgnlElement mgnlElement, Element element) {
  
          mgnlElements.put(element, mgnlElement);
  
          if (elements.get(mgnlElement) != null) {
              elements.get(mgnlElement).add(element);
          }
          else {
             List<Element> elList = new LinkedList<Element>();
             elList.add(element);
             elements.put(mgnlElement, elList);
         }
     }
 
     public MgnlElement getMgnlElement(Element element) {
         return mgnlElements.get(element);
     }
 
     public List<Element> getElements(MgnlElement mgnlElement) {
         return elements.get(mgnlElement);
     }
 
     public void addRoot(MgnlElement boundary) {
         this.rootElements.add(boundary);
     }
 
     public List<MgnlElement> getRootElements() {
         return rootElements;
     }
 
     public void setSelectedMgnlElement(MgnlElement selectedMgnlElement) {
         this.selectedMgnlElement = selectedMgnlElement;
     }
 
     public MgnlElement getSelectedMgnlElement() {
         return selectedMgnlElement;
     }
 
     public FocusModel getFocusModel() {
         return focusModel;
     }
 
 }