/*
* Copyright 2004-2005 the original author or authors.
*
* 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.grails.web.sitemesh;
import java.util.Properties;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import grails.core.GrailsApplication;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;
import com.opensymphony.module.sitemesh.Config;
import com.opensymphony.module.sitemesh.Decorator;
import com.opensymphony.module.sitemesh.DecoratorMapper;
import com.opensymphony.module.sitemesh.Page;
import com.opensymphony.module.sitemesh.mapper.AbstractDecoratorMapper;
/**
* Implements the SiteMesh decorator mapper interface and allows grails views to map to grails layouts.
*
* @author Graeme Rocher
* @author Lari Hotari
*/
public class GrailsLayoutDecoratorMapper extends AbstractDecoratorMapper {
private GroovyPageLayoutFinder groovyPageLayoutFinder;
public static final String LAYOUT_ATTRIBUTE = GroovyPageLayoutFinder.LAYOUT_ATTRIBUTE;
public static final String NONE_LAYOUT = GroovyPageLayoutFinder.NONE_LAYOUT;
public static final String RENDERING_VIEW = GroovyPageLayoutFinder.RENDERING_VIEW_ATTRIBUTE;
@Override
public void init(Config c, Properties properties, DecoratorMapper parentMapper) throws InstantiationException {
super.init(c, properties, parentMapper);
ServletContext servletContext = c.getServletContext();
WebApplicationContext applicationContext = WebApplicationContextUtils.getWebApplicationContext(servletContext);
if(applicationContext != null) {
GrailsApplication grailsApplication = applicationContext.getBean(GrailsApplication.APPLICATION_ID, GrailsApplication.class);
groovyPageLayoutFinder = grailsApplication.getMainContext().getBean("groovyPageLayoutFinder", GroovyPageLayoutFinder.class);
}
}
@Override
public Decorator getDecorator(HttpServletRequest request, Page page) {
if (groovyPageLayoutFinder == null) {
return super.getDecorator(request, page);
}
Decorator layout = groovyPageLayoutFinder.findLayout(request, page);
if (layout != null) {
return layout;
}
layout = parent != null ? super.getDecorator(request, page) : null;
if (layout == null || layout.getPage() == null) {
layout = new GrailsNoDecorator();
}
return layout;
}
@Override
public Decorator getNamedDecorator(HttpServletRequest request, String name) {
if (groovyPageLayoutFinder == null) {
return super.getNamedDecorator(request, name);
}
Decorator layout = groovyPageLayoutFinder.getNamedDecorator(request, name);
if (layout != null) {
return layout;
}
layout = parent != null ? super.getNamedDecorator(request, name) : null;
if (layout == null || layout.getPage() == null) {
layout = new GrailsNoDecorator();
}
return layout;
}
}