/*

  * Copyright 2002 - 2007 JEuclid, http://jeuclid.sf.net

  * 

  * Licensed under the Apache License, Version 2.0 (the "License");

  * you may not use this file except in compliance with the License.

  * You may obtain a copy of the License at

  *

  *      http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  */

 /* $Id: Maction.java,v 2986a8eeaebc 2009/09/24 12:53:08 max $ */

 package net.sourceforge.jeuclid.elements.presentation.enlivening;

 import java.util.Collections;

 import java.util.List;

 import net.sourceforge.jeuclid.elements.AbstractElementWithDelegates;

 import net.sourceforge.jeuclid.layout.LayoutableNode;

 import org.apache.batik.dom.AbstractDocument;

 import org.w3c.dom.Node;

 import org.w3c.dom.mathml.MathMLActionElement;

 /**

  * Represents an maction element.

  * <p>

  * TODO: This element does not actually implement any action.

  * 

  * @version $Revision: 2986a8eeaebc $

  */

 public final class Maction extends AbstractElementWithDelegates implements

         MathMLActionElement {

     /**

      * The XML element from this class.

      */

     public static final String ELEMENT = "maction";

     private static final String ATTR_ACTIONTYPE = "actiontype";

     private static final String ATTR_SELECTION = "selection";

     private static final long serialVersionUID = 1L;

     /**

      * Default constructor. Sets MathML Namespace.

      * 

      * @param qname

      *            Qualified name.

      * @param odoc

      *            Owner Document.

      */

     public Maction(final String qname, final AbstractDocument odoc) {

         super(qname, odoc);

         this.setDefaultMathAttribute(Maction.ATTR_SELECTION, "1");

     }

     /** {@inheritDoc} */

     @Override

     protected Node newNode() {

         return new Maction(this.nodeName, this.ownerDocument);

     }

     /** {@inheritDoc} */

     public String getActiontype() {

         return this.getMathAttribute(Maction.ATTR_ACTIONTYPE);

     }

     /** {@inheritDoc} */

     public String getSelection() {

         return this.getMathAttribute(Maction.ATTR_SELECTION);

     }

     /** {@inheritDoc} */

     public void setActiontype(final String actiontype) {

         this.setAttribute(Maction.ATTR_ACTIONTYPE, actiontype);

     }

     /** {@inheritDoc} */

     public void setSelection(final String selection) {

         this.setAttribute(Maction.ATTR_SELECTION, selection);

     }

     /** {@inheritDoc} */

     @Override

     protected List<LayoutableNode> createDelegates() {

         LayoutableNode selectedElement;

         try {

             final int selected = Integer.parseInt(this.getSelection());

             selectedElement = this.getMathElement(selected - 1);

         } catch (final NumberFormatException nfe) {

             selectedElement = null;

         }

         if (selectedElement == null) {

             return Collections.emptyList();

         } else {

             return Collections.singletonList(selectedElement);

         }

     }

 }