/*
* 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.custom.stylesheet;
import java.io.IOException;
import javax.faces.FacesException;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import org.apache.myfaces.custom.stylesheet.TextResourceFilter.ResourceInfo;
import org.apache.myfaces.renderkit.html.util.AddResourceFactory;
import org.apache.myfaces.shared_tomahawk.renderkit.RendererUtils;
import org.apache.myfaces.shared_tomahawk.renderkit.html.HtmlRenderer;
/**
* @JSFRenderer
* renderKitId = "HTML_BASIC"
* family = "javax.faces.Output"
* type = "org.apache.myfaces.Stylesheet"
*
* @author mwessendorf (latest modification by $Author: skitching $)
* @version $Revision: 671131 $ $Date: 2008-06-24 06:19:43 -0500 (Tue, 24 Jun 2008) $
*/
public class StylesheetRenderer extends HtmlRenderer
{
public void encodeEnd(FacesContext context, UIComponent component)
throws IOException, FacesException
{
if ((context == null) || (component == null))
{
throw new NullPointerException();
}
Stylesheet stylesheet = (Stylesheet) component;
ResponseWriter writer = context.getResponseWriter();
String path = stylesheet.getPath();
if (stylesheet.isInline())
{
//include as inline css
if (!path.startsWith("/"))
{
throw new FacesException("Inline stylesheets require absolute resource path");
}
writer.startElement("style", component);
writer.writeAttribute("type", "text/css", null);
if (stylesheet.getMedia() != null)
{
writer.writeAttribute("media", stylesheet.getMedia(), null);
}
Object text;
if (stylesheet.isFiltered())
{
// Load, filter and cache the resource. Then return the cached data.
ResourceInfo info = TextResourceFilter.getInstance(context).getOrCreateFilteredResource(context, path);
text = info.getText();
}
else
{
// Just load the data (not cached)
text = RendererUtils.loadResourceFile(context, path);
}
if (text != null)
{
writer.writeText(text, null);
}
writer.endElement("style");
}
else
{
//refere as link-element
writer.startElement("link", component);
writer.writeAttribute("rel", "stylesheet", null);
writer.writeAttribute("type", "text/css", null);
if (stylesheet.getMedia() != null)
{
writer.writeAttribute("media", stylesheet.getMedia(), null);
}
String stylesheetPath;
if (stylesheet.isFiltered())
{
if (!path.startsWith("/"))
{
throw new FacesException("Filtered stylesheets require absolute resource path");
}
// Load, filter and cache the resource
TextResourceFilter.getInstance(context).getOrCreateFilteredResource(context, path);
// Compute a URL that goes via the tomahawk ExtensionsFilter and the
// TextResourceFilterProvider to fetch the resource from the cache.
//
// Unfortunately the getResourceUri(context, Class, String, bool) api below is
// really meant for serving resources out of the Tomahawk jarfile, relative to
// some class that the resource belongs to. So it only expects to receive
// relative paths. We are abusing it here to serve resources out of the
// webapp, specified by an absolute path. So here, the leading slash is
// stripped off and in the TextResourceFilterProvider a matching hack
// puts it back on again. A better solution would be to write a custom
// ResourceHandler class and pass that to the getResourceUri method...
// TODO: fixme
String nastyPathHack = path.substring(1);
stylesheetPath = AddResourceFactory.getInstance(context).getResourceUri(
context,
TextResourceFilterProvider.class,
nastyPathHack,
true);
}
else
{
stylesheetPath = context.getApplication().getViewHandler().getResourceURL(context, path);
}
writer.writeURIAttribute("href", stylesheetPath, "path");
writer.endElement("link");
}
}
}