/*
* Copyright 2014 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 groovy.text.Template;
import java.io.PrintWriter;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.grails.web.servlet.WrappedResponseHolder;
import org.grails.web.servlet.mvc.GrailsWebRequest;
import org.grails.web.servlet.view.AbstractGrailsView;
import org.springframework.http.MediaType;
import org.springframework.web.servlet.View;
import com.opensymphony.module.sitemesh.RequestConstants;
import com.opensymphony.sitemesh.Content;
public class GrailsLayoutView extends AbstractGrailsView {
GroovyPageLayoutFinder groovyPageLayoutFinder;
protected View innerView;
public static final String GSP_SITEMESH_PAGE = GrailsLayoutView.class.getName() + ".GSP_SITEMESH_PAGE";
public GrailsLayoutView(GroovyPageLayoutFinder groovyPageLayoutFinder, View innerView) {
this.groovyPageLayoutFinder = groovyPageLayoutFinder;
this.innerView = innerView;
}
@Override
public String getContentType() {
return MediaType.ALL_VALUE;
}
@Override
protected void renderTemplate(Map<String, Object> model, GrailsWebRequest webRequest, HttpServletRequest request,
HttpServletResponse response) throws Exception {
Content content = obtainContent(model, webRequest, request, response);
if (content != null) {
beforeDecorating(content, model, webRequest, request, response);
SpringMVCViewDecorator decorator = (SpringMVCViewDecorator)groovyPageLayoutFinder.findLayout(request, content);
if(decorator != null) {
decorator.render(content, model, request, response, webRequest.getServletContext());
} else {
PrintWriter writer = response.getWriter();
content.writeOriginal(writer);
if (!response.isCommitted()) {
writer.flush();
}
}
}
}
protected void beforeDecorating(Content content, Map<String, Object> model, GrailsWebRequest webRequest,
HttpServletRequest request, HttpServletResponse response) {
applyMetaHttpEquivContentType(content, response);
}
protected void applyMetaHttpEquivContentType(Content content, HttpServletResponse response) {
String contentType = content.getProperty("meta.http-equiv.Content-Type");
if (contentType != null && "text/html".equals(response.getContentType())) {
response.setContentType(contentType);
}
}
protected Content obtainContent(Map<String, Object> model, GrailsWebRequest webRequest, HttpServletRequest request,
HttpServletResponse response) throws Exception {
Object oldPage = request.getAttribute(RequestConstants.PAGE);
request.removeAttribute(RequestConstants.PAGE);
Object oldGspSiteMeshPage=request.getAttribute(GrailsLayoutView.GSP_SITEMESH_PAGE);
HttpServletResponse previousResponse = webRequest.getWrappedResponse();
HttpServletResponse previousWrappedResponse = WrappedResponseHolder.getWrappedResponse();
try {
request.setAttribute(GrailsLayoutView.GSP_SITEMESH_PAGE, new GSPSitemeshPage());
GrailsContentBufferingResponse contentBufferingResponse = createContentBufferingResponse(model, webRequest, request, response);
webRequest.setWrappedResponse(contentBufferingResponse);
WrappedResponseHolder.setWrappedResponse(contentBufferingResponse);
renderInnerView(model, webRequest, request, response, contentBufferingResponse);
return contentBufferingResponse.getContent();
}
finally {
if (oldGspSiteMeshPage != null) {
request.setAttribute(GrailsLayoutView.GSP_SITEMESH_PAGE, oldGspSiteMeshPage);
}
if (oldPage != null) {
request.setAttribute(RequestConstants.PAGE, oldPage);
}
webRequest.setWrappedResponse(previousResponse);
WrappedResponseHolder.setWrappedResponse(previousWrappedResponse);
}
}
protected void renderInnerView(Map<String, Object> model, GrailsWebRequest webRequest, HttpServletRequest request,
HttpServletResponse response,
GrailsContentBufferingResponse contentBufferingResponse) throws Exception {
innerView.render(model, request, contentBufferingResponse);
}
protected GrailsContentBufferingResponse createContentBufferingResponse(Map<String, Object> model, GrailsWebRequest webRequest, HttpServletRequest request,
HttpServletResponse response) {
return new GrailsViewBufferingResponse(request, response);
}
@Override
public Template getTemplate() {
if(innerView instanceof AbstractGrailsView) {
return ((AbstractGrailsView)innerView).getTemplate();
}
return null;
}
public View getInnerView() {
return innerView;
}
}