/**
* License Agreement.
*
* Rich Faces - Natural Ajax for Java Server Faces (JSF)
*
* Copyright (C) 2007 Exadel, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.ajax4jsf.renderkit.html;
import java.io.IOException;
import java.util.Iterator;
import java.util.Set;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import org.ajax4jsf.component.UIAjaxOutputPanel;
import org.ajax4jsf.context.AjaxContext;
import org.ajax4jsf.renderkit.RendererBase;
import org.ajax4jsf.renderkit.RendererUtils.HTML;
/**
* @author asmirnov@exadel.com (latest modification by $Author: alexsmirnov $)
* @version $Revision: 1.1.2.1 $ $Date: 2007/02/01 15:31:27 $
*
*/
public class AjaxOutputPanelRenderer extends RendererBase {
private final String[] STYLE_ATTRIBUTES = new String[]{"style","class"};
/* (non-Javadoc)
* @see javax.faces.render.Renderer#encodeChildren(javax.faces.context.FacesContext, javax.faces.component.UIComponent)
*/
public void encodeChildren(FacesContext context, UIComponent component) throws IOException {
//
UIAjaxOutputPanel panel = (UIAjaxOutputPanel) component;
if ("none".equals(panel.getLayout())) {
if (component.getChildCount() > 0) {
AjaxContext ajaxContext = AjaxContext.getCurrentInstance(context);
boolean ajaxRequest = ajaxContext.isAjaxRequest();
Set ajaxRenderedAreas = ajaxContext.getAjaxRenderedAreas();
for (Iterator it = component.getChildren().iterator(); it.hasNext();) {
UIComponent child = (UIComponent) it.next();
String childId = child.getClientId(context);
if (child.isRendered()) {
renderChild(context, child);
} else {
// Render "dummy" span.
ResponseWriter out = context.getResponseWriter();
out.startElement(HTML.SPAN_ELEM,child);
out.writeAttribute(HTML.id_ATTRIBUTE,childId,HTML.id_ATTRIBUTE);
out.writeAttribute(HTML.style_ATTRIBUTE,"display: none;","style");
out.endElement(HTML.SPAN_ELEM);
}
// register child as rendered
if(ajaxRequest && null != ajaxRenderedAreas) {
ajaxRenderedAreas.add(childId);
}
}
}
} else {
renderChildren(context,component);
}
}
/* (non-Javadoc)
* @see javax.faces.render.Renderer#getRendersChildren()
*/
public boolean getRendersChildren() {
// TODO Auto-generated method stub
return true;
}
/* (non-Javadoc)
* @see org.ajax4jsf.renderkit.RendererBase#getComponentClass()
*/
protected Class getComponentClass() {
// TODO Auto-generated method stub
return UIAjaxOutputPanel.class;
}
/* (non-Javadoc)
* @see org.ajax4jsf.renderkit.RendererBase#doEncodeBegin(javax.faces.context.ResponseWriter, javax.faces.context.FacesContext, javax.faces.component.UIComponent)
*/
protected void doEncodeBegin(ResponseWriter writer, FacesContext context, UIComponent component) throws IOException {
UIAjaxOutputPanel panel = (UIAjaxOutputPanel) component;
if (!"none".equals(panel.getLayout())) {
writer.startElement(getTag(panel), panel);
getUtils().encodeId(context, component);
getUtils().encodePassThru(context, component);
getUtils().encodeAttributesFromArray(context,component,STYLE_ATTRIBUTES);
}
}
/**
* @param panel
* @return
*/
private String getTag(UIAjaxOutputPanel panel) {
// TODO Auto-generated method stub
return "block".equals(panel.getLayout())?HTML.DIV_ELEM:HTML.SPAN_ELEM;
}
/* (non-Javadoc)
* @see org.ajax4jsf.renderkit.RendererBase#doEncodeEnd(javax.faces.context.ResponseWriter, javax.faces.context.FacesContext, javax.faces.component.UIComponent)
*/
protected void doEncodeEnd(ResponseWriter writer, FacesContext context, UIComponent component) throws IOException {
UIAjaxOutputPanel panel = (UIAjaxOutputPanel) component;
if (!"none".equals(panel.getLayout())) {
writer.endElement(getTag(panel));
}
if (panel.isKeepTransient()) {
markNoTransient(component);
}
}
/**
* Set "transient" flag to false for component and all its children ( recursive ).
* @param component
*/
private void markNoTransient(UIComponent component) {
for (Iterator iter = component.getFacetsAndChildren(); iter.hasNext();) {
UIComponent element = (UIComponent) iter.next();
markNoTransient(element);
element.setTransient(false);
}
}
}