/*******************************************************************************
 * Copyright (c) 2001, 2009 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *     Jens Lukowski/Innoopract - initial renaming/restructuring
 *     
 *******************************************************************************/
package org.eclipse.wst.xml.ui.internal.actions;

import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Vector;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.wst.xml.core.internal.contentmodel.util.DOMVisitor;
import org.eclipse.wst.xml.ui.internal.XMLUIPlugin;
import org.w3c.dom.Attr;
import org.w3c.dom.Element;
import org.w3c.dom.Node;



public class ReplacePrefixAction extends NodeAction {

	class NodeCollectingDOMVisitor extends DOMVisitor {
		public List list = new Vector();

		protected boolean isPrefixChangedNeeded(Node node) {
			String key = node.getPrefix() != null ? node.getPrefix() : ""; //$NON-NLS-1$
			return prefixMapping.get(key) != null;
		}

		public void visitAttr(Attr attr) {
			/*
			 * if (isPrefixChangedNeeded(element)) { list.add(attr); }
			 */
		}

		protected void visitElement(Element element) {
			super.visitElement(element);
			if (isPrefixChangedNeeded(element)) {
				list.add(element);
			}
		}
	}

	protected static ImageDescriptor imageDescriptor;
	protected Element element;
	protected AbstractNodeActionManager manager;
	protected Map prefixMapping;

	public ReplacePrefixAction(AbstractNodeActionManager manager, Element element, Map prefixMapping) {
		this.manager = manager;
		this.element = element;
		this.prefixMapping = prefixMapping;
	}

	public String getUndoDescription() {
		return ""; //$NON-NLS-1$
	}

	public void run() {
		Shell shell = XMLUIPlugin.getInstance().getWorkbench().getActiveWorkbenchWindow().getShell();
		if (validateEdit(manager.getModel(), shell)) {
			NodeCollectingDOMVisitor visitor = new NodeCollectingDOMVisitor();
			visitor.visitNode(element);
			for (Iterator i = visitor.list.iterator(); i.hasNext();) {
				Node node = (Node) i.next();
				String key = node.getPrefix() != null ? node.getPrefix() : ""; //$NON-NLS-1$
				String newPrefix = (String) prefixMapping.get(key);
				if (newPrefix != null) {
					node.setPrefix(newPrefix);
				}
			}
		}
	}
}