JavascriptBehaviorRenderer.java

/*
 * Copyright 2011 PrimeFaces Extensions.
 *
 * 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: JavascriptBehaviorRenderer.java 478 2011-11-27 22:38:25Z Zoigln@googlemail.com $
 */

package org.primefaces.extensions.behavior.javascript;

import javax.faces.component.UIComponent;
import javax.faces.component.UIParameter;
import javax.faces.component.behavior.ClientBehavior;
import javax.faces.component.behavior.ClientBehaviorContext;
import javax.faces.context.FacesContext;
import javax.faces.render.ClientBehaviorRenderer;

/**
 * {@link ClientBehaviorRenderer} implementation for the {@link JavascriptBehavior}.
 *
 * @author Thomas Andraschko / last modified by $Author: Zoigln@googlemail.com $
 * @version $Revision: 478 $
 * @since 0.2
 */
public class JavascriptBehaviorRenderer extends ClientBehaviorRenderer {

	@Override
	public String getScript(final ClientBehaviorContext behaviorContext, final ClientBehavior behavior) {
		final JavascriptBehavior javascriptBehavior = (JavascriptBehavior) behavior;
		if (javascriptBehavior.isDisabled()) {
			return null;
		}

		final FacesContext context = behaviorContext.getFacesContext();
		final UIComponent component = behaviorContext.getComponent();
		String source = behaviorContext.getSourceId();
		if (source == null) {
			source = component.getClientId(context);
		}

		final StringBuilder script = new StringBuilder();
		script.append("PrimeFacesExt.behavior.Javascript({");
		script.append("source:'").append(source).append("'");
		script.append(",event:'").append(behaviorContext.getEventName()).append("'");
		script.append(",execute:function(source, event, params, ext){");
		script.append(javascriptBehavior.getExecute()).append(";}");

		// params
		boolean paramWritten = false;

		for (final UIComponent child : component.getChildren()) {
			if (child instanceof UIParameter) {
				final UIParameter parameter = (UIParameter) child;

				if (paramWritten) {
					script.append(",");
				} else {
					paramWritten = true;
					script.append(",params:{");
				}

				script.append("'");
				script.append(parameter.getName()).append("':'").append(parameter.getValue());
				script.append("'");
			}
		}

		if (paramWritten) {
			script.append("}");
		}

		script.append("}, arguments[1]);");

		return script.toString();
	}
}