/**
    * 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.dom;
  
  import java.util.LinkedList;
  import java.util.List;
  
  import com.google.gwt.dom.client.Element;
  
  /**
  * MgnlElement Constructor.
  *
  * @throws IllegalArgumentException if comments tagname is not a defined marker.
  */
  public class MgnlElement {
  
      private CMSComment comment;
      private MgnlElement parent;
      private boolean isArea = false;
      private boolean isComponent = false;
  
      private Element firstElement;
      private Element lastElement;
  
      private LinkedList<MgnlElement> children = new LinkedList<MgnlElement>();
  
      private static final String MARKER_AREA = "cms:area";
      private static final String MARKER_COMPONENT = "cms:component";
  
      public MgnlElement(CMSComment comment, MgnlElement parent) throws IllegalArgumentException {
  
          if (!isMgnlElement(comment.getTagName())) {
              throw new IllegalArgumentException("The tagname must be one of the defined marker Strings.");
          }
          this.comment = comment;
          this.parent = parent;
      }
      public boolean isMgnlElement(String tagName) {
          if (tagName.equals(MARKER_AREA)) {
              this.isArea = true;
              return true;
          }
          else if (tagName.equals(MARKER_COMPONENT)) {
              this.isComponent = true;
              return true;
          }
  
          return false;
      }
  
      public boolean isArea() {
          return isArea;
      }
  
      public boolean isComponent() {
          return isComponent;
      }
  
      public MgnlElement getParent() {
          return parent;
      }
  
      public void setParent(MgnlElement parent) {
          this.parent = parent;
      }
  
      public LinkedList<MgnlElement> getChildren() {
          return children;
     }
 
     public List<MgnlElement> getDescendants() {
 
         List<MgnlElement> descendants = new LinkedList<MgnlElement>();
 
         for (MgnlElement element : getChildren()) {
             descendants.add(element);
             descendants.addAll(element.getDescendants());
         }
         return descendants;
     }
 
     public List<MgnlElement> getAscendants() {
         List<MgnlElement> ascendants = new LinkedList<MgnlElement>();
         MgnlElement parent = this.parent;
         while (parent != null) {
             ascendants.add(parent);
             parent = parent.getParent();
         }
         return ascendants;
     }
 
     public MgnlElement getRootArea() {
         MgnlElement rootArea = null;
         for (MgnlElement parent = this; parent != null; parent = parent.getParent()) {
             if (parent.isArea()) {
                 rootArea = parent;
             }
         }
         return rootArea;
     }
 
     public MgnlElement getParentArea() {
         MgnlElement parentArea = null;
         for (MgnlElement parent = this; parent != null; parent = parent.getParent()) {
             if (parent.isArea()) {
                 parentArea = parent;
                 break;
             }
         }
         return parentArea;
     }
 
     public CMSComment getComment() {
         return comment;
     }
 
     public List<MgnlElement> getComponents() {
         List<MgnlElement> components = new LinkedList<MgnlElement>();
         for (MgnlElement element : getChildren()) {
             if (element.isComponent()) {
                 components.add(element);
             }
         }
         return components;
     }
     public List<MgnlElement> getAreas() {
         List<MgnlElement> areas = new LinkedList<MgnlElement>();
         for (MgnlElement element : getChildren()) {
             if (element.isArea()) {
                 areas.add(element);
             }
         }
         return areas;
     }
 
     public MgnlElement getRoot() {
         MgnlElement root = null;
         for (MgnlElement parent = this; parent != null; parent = parent.getParent()) {
                 root = parent;
         }
         return root;
     }
 
     public boolean isRelated(MgnlElement relative) {
 
         if (relative != null && this.getRoot() == relative.getRoot()) {
                 return true;
         }
         return false;
     }
 
     public Element getFirstElement() {
         return firstElement;
     }
 
     public void setFirstElement(Element firstElement) {
         this.firstElement = firstElement;
     }
 
     public Element getLastElement() {
         return lastElement;
     }
 
     public void setLastElement(Element lastElement) {
         this.lastElement = lastElement;
     }
 }