/*
* Copyright 1999-2004 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.cocoon.woody.event.impl;
import org.apache.cocoon.woody.event.ActionListener;
import org.apache.cocoon.woody.event.ValueChangedListener;
import org.apache.cocoon.woody.event.WidgetListener;
import org.apache.cocoon.woody.event.WidgetListenerBuilder;
import org.apache.cocoon.woody.util.JavaScriptHelper;
import org.mozilla.javascript.Script;
import org.w3c.dom.Element;
/**
* Builds a {@link WidgetListener} based on a JavaScript snippet.
* <p>
* The syntax for this listener is as follows :
* <pre>
* <javascript>
* var widget = event.sourceWidget;
* sourceWidget.setValue("Yeah");
* </javascript>
* </pre>
* As shown above, the event that fired this listener is published as the <code>event</code>
* variable.
*
* @author <a href="http://www.apache.org/~sylvain/">Sylvain Wallez</a>
* @version CVS $Id: JavaScriptWidgetListenerBuilder.java,v 1.8 2004/03/09 13:54:26 reinhard Exp $
*/
public class JavaScriptWidgetListenerBuilder implements WidgetListenerBuilder {
public static final JavaScriptWidgetListenerBuilder INSTANCE = new JavaScriptWidgetListenerBuilder();
public WidgetListener buildListener(Element element, Class listenerClass) throws Exception {
Script script = JavaScriptHelper.buildScript(element);
if (listenerClass == ActionListener.class) {
return new JavaScriptWidgetListener.JSActionListener(script);
} else if (listenerClass == ValueChangedListener.class) {
return new JavaScriptWidgetListener.JSValueChangedListener(script);
} else {
throw new Exception("Unkonwn event class: " + listenerClass);
}
}
}