/*

   Copyright 2005  The Apache Software Foundation 

   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.

 */
package org.apache.batik.dom.svg12;

import org.apache.batik.dom.AbstractDocument;
import org.apache.batik.dom.svg.IdContainer;
import org.apache.batik.dom.xbl.XBLShadowTreeElement;

import org.w3c.dom.Node;
import org.w3c.dom.Element;

/**
 * This class implements the xbl:shadowTree element.
 *
 * @author <a href="mailto:cam%40mcc%2eid%2eau">Cameron McCormack</a>
 * @version $Id$
 */
public class XBLOMShadowTreeElement
        extends XBLOMElement
        implements XBLShadowTreeElement, IdContainer {

    /**
     * Creates a new XBLOMShadowTreeElement.
     */
    protected XBLOMShadowTreeElement() {
    }

    /**
     * Creates a new XBLOMShadowTreeElement.
     * @param prefix The namespace prefix.
     * @param owner  The owner document.
     */
    public XBLOMShadowTreeElement(String prefix, AbstractDocument owner) {
        super(prefix, owner);
    }

    /**
     * <b>DOM</b>: Implements {@link Node#getLocalName()}.
     */
    public String getLocalName() {
        return XBL_SHADOW_TREE_TAG;
    }

    /**
     * Returns a new uninitialized instance of this object's class.
     */
    protected Node newNode() {
        return new XBLOMShadowTreeElement();
    }

    // XBLShadowTreeElement //////////////////////////////////////////////////

    /**
     * Returns the Element that has an ID attribute with the given value.
     */
    public Element getElementById(String elementId) {
        return getElementById(elementId, this);
    }

    protected Element getElementById(String elementId, Node n) {
        if (n.getNodeType() == Node.ELEMENT_NODE) {
            Element e = (Element) n;
            if (e.getAttributeNS(null, "id").equals(elementId)) {
                return (Element) n;
            }
        }
        for (Node m = n.getFirstChild(); m != null; m = m.getNextSibling()) {
            Element result = getElementById(elementId, m);
            if (result != null) {
                return result;
            }
        }
        return null;
    }

    // CSSNavigableNode //////////////////////////////////////////////////////

    /**
     * Returns the parent of the imported element, from the CSS
     * point of view.
     */
    public Node getCSSParentNode() {
        return ownerDocument.getXBLManager().getXblBoundElement(this);
    }
}
