/**********************************************************************************
* $URL: https://source.sakaiproject.org/svn/sam/trunk/samigo-app/src/java/org/sakaiproject/tool/assessment/jsf/renderer/NavigationMapRenderer.java $
* $Id: NavigationMapRenderer.java 106463 2012-04-02 12:20:09Z david.horwitz@uct.ac.za $
***********************************************************************************
*
* Copyright (c) 2004, 2005, 2006, 2008, 2009 The Sakai Foundation
*
* Licensed under the Educational Community 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.opensource.org/licenses/ECL-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.sakaiproject.tool.assessment.jsf.renderer;
import java.io.IOException;
import javax.faces.component.UIComponent;
import javax.faces.component.UIOutput;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.faces.render.Renderer;
import javax.faces.el.ValueBinding;
import java.util.Map;
import java.util.Set;
import java.util.Iterator;
/**
* <p>Description: </p>
* <p>Render a stylesheet link for the value of our component's
* <code>path</code> attribute, prefixed by the context path of this
* web application.</p>
* <p> Based on example code by Sun Microsystems. </p>
* <p>Copyright: Copyright (c) 2004</p>
* <p>Organization: Sakai Project</p>
* @author Ed Smiley
* @version $Id: NavigationMapRenderer.java 106463 2012-04-02 12:20:09Z david.horwitz@uct.ac.za $
*/
public class NavigationMapRenderer extends Renderer
{
public boolean supportsComponentType(UIComponent component)
{
return (component instanceof UIOutput);
}
public void decode(FacesContext context, UIComponent component)
{
}
public void encodeBegin(FacesContext context, UIComponent component)
throws IOException
{
;
}
public void encodeChildren(FacesContext context, UIComponent component)
throws IOException
{
;
}
/**
* <p>Render a relative HTML <code><link></code> element for a
* <code>text/css</code> stylesheet at the specified context-relative
* path.</p>
*
* @param context FacesContext for the request we are processing
* @param component UIComponent to be rendered
*
* @throws IOException if an input/output error occurs while rendering
* @throws NullPointerException if <code>context</code>
* or <code>component</code> is null
*/
public void encodeEnd(FacesContext context, UIComponent component)
throws IOException
{
ResponseWriter writer = context.getResponseWriter();
Map map = (Map) get(context, component, "map");
if (map == null) return;
String separator = (String) get(context, component, "separator");
String style = (String) get(context, component, "style");
String linkStyle = (String) get(context, component, "linkStyle");
if (separator == null) separator = "";
String contextPath = context.getExternalContext().getRequestContextPath();
if (style!=null && style.length()!=0)
{
writer.write("<span class=\"" + style+ "\">");
}
String sep = "";
for (Iterator it = map.entrySet().iterator(); it.hasNext();) {
writer.write(sep);
Map.Entry entry = (Map.Entry) it.next();
String key = (String)entry.getKey();
String value = (String)entry.getValue();
writeLink(writer, component, key, value, contextPath, linkStyle);
sep = separator;
}
if (style!=null && style.length()!=0)
{
writer.write("</span>");
}
}
/**
* Write one link
* @param writer the writer for output
* @param component the component
* @param text the text of the link
* @param link the context relative url, or script
* @param path the context path
* @throws IOException
*/
private void writeLink(ResponseWriter writer, UIComponent component,
String text, String link, String path, String styleClass) throws IOException
{
writer.write(" ");
writer.startElement("a", component);
// if javascript create onclick handler, else regular link
if (link.toLowerCase().startsWith("javascript"))
{
writer.writeAttribute("href", "#", null);
writer.writeAttribute("onclick", link, null);
}
else
{
writer.writeAttribute("href", path + "/" + link, null);
}
if (styleClass != null)
{
writer.writeAttribute("class", styleClass, "styleClass");
}
writer.writeText(text, null);
writer.endElement("a");
writer.write(" ");
}
/**
*
* @param context FacesContext
* @param component UIComponent
* @param name String
* @return Object
*/
private static Object get(FacesContext context, UIComponent component,
String name)
{
ValueBinding binding = component.getValueBinding(name);
if (binding != null)
{
return binding.getValue(context);
}
else
{
return component.getAttributes().get(name);
}
}
}