/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.myfaces.renderkit.html;
import java.io.IOException;
import java.util.Map;
import java.util.logging.Logger;
import javax.faces.application.FacesMessage;
import javax.faces.application.ProjectStage;
import javax.faces.application.Resource;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.faces.event.ComponentSystemEvent;
import javax.faces.event.ComponentSystemEventListener;
import javax.faces.event.ListenerFor;
import javax.faces.event.PostAddToViewEvent;
import javax.faces.render.Renderer;
import javax.faces.view.Location;
import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFRenderer;
import org.apache.myfaces.context.RequestViewContext;
import org.apache.myfaces.shared.config.MyfacesConfig;
import org.apache.myfaces.shared.renderkit.JSFAttr;
import org.apache.myfaces.shared.renderkit.RendererUtils;
import org.apache.myfaces.shared.renderkit.html.HTML;
import org.apache.myfaces.shared.renderkit.html.util.ResourceUtils;
import org.apache.myfaces.shared.util.ExternalContextUtils;
import org.apache.myfaces.view.facelets.FaceletViewDeclarationLanguage;
import org.apache.myfaces.view.facelets.el.CompositeComponentELUtils;
import org.apache.myfaces.view.facelets.tag.jsf.ComponentSupport;
/**
* Renderer used by h:outputStylesheet component
*
* Note: originally this component required PostBuildComponentTreeOnRestoreViewEvent,
* but that is no longer true because a tag handler implementing RelocatableResourceHandler
* interface was associated, so the component is really marked and refreshed.
*
* @since 2.0
* @author Leonardo Uribe (latest modification by $Author: lu4242 $)
* @version $Revision: 1569988 $ $Date: 2014-02-19 23:51:55 +0000 (Wed, 19 Feb 2014) $
*/
@JSFRenderer(renderKitId = "HTML_BASIC", family = "javax.faces.Output", type = "javax.faces.resource.Stylesheet")
@ListenerFor(systemEventClass = PostAddToViewEvent.class)
public class HtmlStylesheetRenderer extends Renderer implements
ComponentSystemEventListener
{
//private static final Log log = LogFactory.getLog(HtmlStylesheetRenderer.class);
private static final Logger log = Logger.getLogger(HtmlStylesheetRenderer.class.getName());
private static final String IS_BUILDING_INITIAL_STATE = "javax.faces.IS_BUILDING_INITIAL_STATE";
public void processEvent(ComponentSystemEvent event)
{
if (event instanceof PostAddToViewEvent)
{
UIComponent component = event.getComponent();
FacesContext facesContext = FacesContext.getCurrentInstance();
Location location = (Location) component.getAttributes().get(CompositeComponentELUtils.LOCATION_KEY);
if (location != null)
{
UIComponent ccParent
= CompositeComponentELUtils.getCompositeComponentBasedOnLocation(facesContext, location);
if (ccParent != null)
{
component.getAttributes().put(
CompositeComponentELUtils.CC_FIND_COMPONENT_EXPRESSION,
ComponentSupport.getFindComponentExpression(facesContext, ccParent));
}
}
// If this is an ajax request and the view is being refreshed and a PostAddToViewEvent
// was propagated to relocate this resource, means the header must be refreshed.
// Note ajax request does not occur on non postback requests.
if (!ExternalContextUtils.isPortlet(facesContext.getExternalContext()) &&
facesContext.getPartialViewContext().isAjaxRequest() )
{
boolean isBuildingInitialState = facesContext.getAttributes().
containsKey(IS_BUILDING_INITIAL_STATE);
// The next condition takes into account the current request is an ajax request.
boolean isPostAddToViewEventAfterBuildInitialState =
!isBuildingInitialState ||
(isBuildingInitialState &&
FaceletViewDeclarationLanguage.isRefreshingTransientBuild(facesContext));
if (isPostAddToViewEventAfterBuildInitialState &&
MyfacesConfig.getCurrentInstance(facesContext.getExternalContext()).
isStrictJsf2RefreshTargetAjax())
{
//!(component.getParent() instanceof ComponentResourceContainer)
RequestViewContext requestViewContext = RequestViewContext.getCurrentInstance(facesContext);
requestViewContext.setRenderTarget("head", true);
}
}
facesContext.getViewRoot().addComponentResource(facesContext,
component, "head");
}
}
@Override
public boolean getRendersChildren()
{
return true;
}
@Override
public void encodeChildren(FacesContext facesContext, UIComponent component)
throws IOException
{
if (facesContext == null)
{
throw new NullPointerException("context");
}
if (component == null)
{
throw new NullPointerException("component");
}
Map<String, Object> componentAttributesMap = component.getAttributes();
String resourceName = (String) componentAttributesMap.get(JSFAttr.NAME_ATTR);
boolean hasChildren = component.getChildCount() > 0;
if (resourceName != null && (!"".equals(resourceName)) )
{
if (hasChildren)
{
log.info("Component with resourceName "+ resourceName +
" and child components found. Child components will be ignored.");
}
}
else
{
if (hasChildren)
{
ResponseWriter writer = facesContext.getResponseWriter();
writer.startElement(HTML.STYLE_ELEM, component);
writer.writeAttribute(HTML.TYPE_ATTR, HTML.STYLE_TYPE_TEXT_CSS, null);
RendererUtils.renderChildren(facesContext, component);
writer.endElement(HTML.STYLE_ELEM);
}
else
{
if (!facesContext.isProjectStage(ProjectStage.Production))
{
facesContext.addMessage(component.getClientId(facesContext),
new FacesMessage("Component with no name and no body content, so nothing rendered."));
}
}
}
}
@Override
public void encodeEnd(FacesContext facesContext, UIComponent component)
throws IOException
{
super.encodeEnd(facesContext, component); //check for NP
Map<String, Object> componentAttributesMap = component.getAttributes();
String resourceName = (String) componentAttributesMap.get(JSFAttr.NAME_ATTR);
String libraryName = (String) componentAttributesMap.get(JSFAttr.LIBRARY_ATTR);
if (resourceName == null)
{
//log.warn("Trying to encode resource represented by component" +
// component.getClientId() + " without resourceName."+
// " It will be silenty ignored.");
return;
}
if ("".equals(resourceName))
{
return;
}
String additionalQueryParams = null;
int index = resourceName.indexOf('?');
if (index >= 0)
{
additionalQueryParams = resourceName.substring(index + 1);
resourceName = resourceName.substring(0, index);
}
Resource resource;
if (libraryName == null)
{
if (ResourceUtils.isRenderedStylesheet(facesContext, libraryName, resourceName))
{
//Resource already founded
return;
}
resource = facesContext.getApplication().getResourceHandler()
.createResource(resourceName);
}
else
{
if (ResourceUtils.isRenderedStylesheet(facesContext, libraryName, resourceName))
{
//Resource already founded
return;
}
resource = facesContext.getApplication().getResourceHandler()
.createResource(resourceName, libraryName);
}
if (resource == null)
{
//no resource found
log.warning("Resource referenced by resourceName "+ resourceName +
(libraryName == null ? "" : " and libraryName " + libraryName) +
" not found in call to ResourceHandler.createResource."+
" It will be silenty ignored.");
return;
}
else
{
if (ResourceUtils.isRenderedStylesheet(facesContext, resource.getLibraryName(), resource.getResourceName()))
{
//Resource already founded
return;
}
// Rendering resource
ResourceUtils.markStylesheetAsRendered(facesContext, libraryName, resourceName);
ResourceUtils.markStylesheetAsRendered(facesContext, resource.getLibraryName(), resource.getResourceName());
ResponseWriter writer = facesContext.getResponseWriter();
writer.startElement(HTML.LINK_ELEM, component);
writer.writeAttribute(HTML.REL_ATTR, HTML.STYLESHEET_VALUE,null );
String media = (String) component.getAttributes().get("media");
writer.writeAttribute("media", media == null ? "screen" : media ,null );
writer.writeAttribute(HTML.TYPE_ATTR,
(resource.getContentType() == null ? HTML.STYLE_TYPE_TEXT_CSS
: resource.getContentType()) , null);
String path = resource.getRequestPath();
if (additionalQueryParams != null)
{
path = path + ((path.indexOf('?') >= 0) ? "&" : "?") + additionalQueryParams;
}
writer.writeURIAttribute(HTML.HREF_ATTR,
facesContext.getExternalContext().encodeResourceURL(path), null);
writer.endElement(HTML.LINK_ELEM);
}
}
}