/*
* Copyright 1999,2000,2004 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.html.dom;
import org.apache.xerces.dom.DeepNodeListImpl;
import org.apache.xerces.dom.ElementImpl;
import org.apache.xerces.dom.NodeImpl;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
/**
* This class implements the DOM's NodeList behavior for
* HTMLDocuemnt.getElementsByName().
*
* @xerces.internal
*
* @version $Id: NameNodeListImpl.java 320092 2004-10-05 03:23:48Z mrglavas $
* @since PR-DOM-Level-1-19980818.
* @see DeepNodeListImpl
*/
public class NameNodeListImpl
extends DeepNodeListImpl
implements NodeList {
/** Constructor. */
public NameNodeListImpl(NodeImpl rootNode, String tagName) {
super( rootNode, tagName );
}
/**
* Iterative tree-walker. When you have a Parent link, there's often no
* need to resort to recursion. NOTE THAT only Element nodes are matched
* since we're specifically supporting getElementsByTagName().
*/
protected Node nextMatchingElementAfter(Node current) {
Node next;
while (current != null) {
// Look down to first child.
if (current.hasChildNodes()) {
current = (current.getFirstChild());
}
// Look right to sibling (but not from root!)
else if (current != rootNode && null != (next = current.getNextSibling())) {
current = next;
}
// Look up and right (but not past root!)
else {
next = null;
for (; current != rootNode; // Stop when we return to starting point
current = current.getParentNode()) {
next = current.getNextSibling();
if (next != null)
break;
}
current = next;
}
// Have we found an Element with the right tagName?
// ("*" matches anything.)
if (current != rootNode && current != null
&& current.getNodeType() == Node.ELEMENT_NODE ) {
String name = ((ElementImpl) current).getAttribute( "name" );
if ( name.equals("*") || name.equals(tagName))
return current;
}
// Otherwise continue walking the tree
}
// Fell out of tree-walk; no more instances found
return null;
} // nextMatchingElementAfter(int):Node
} // class NameNodeListImpl