/*
* Copyright 2004 The Apache Software Foundation.
*
* 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.apache.myfaces.custom.navigation;
import org.apache.myfaces.renderkit.RendererUtils;
import org.apache.myfaces.renderkit.html.HTML;
import org.apache.myfaces.renderkit.html.HtmlRendererUtils;
import org.apache.myfaces.renderkit.html.ext.HtmlLinkRenderer;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;
/**
* @author Manfred Geiler (latest modification by $Author: baranda $)
* @version $Revision: 290917 $ $Date: 2005-09-22 05:25:28 -0400 (Thu, 22 Sep 2005) $
*/
public class HtmlNavigationRenderer
extends HtmlLinkRenderer
{
private static final Log log = LogFactory.getLog(HtmlNavigationRenderer.class);
private static final Integer ZERO_INTEGER = new Integer(0);
public boolean getRendersChildren()
{
return true;
}
public void decode(FacesContext facesContext, UIComponent component)
{
if (component instanceof HtmlCommandNavigation)
{
//HtmlCommandNavigation
super.decode(facesContext, component);
}
}
public void encodeBegin(FacesContext facesContext, UIComponent component) throws IOException
{
if (component instanceof HtmlCommandNavigation)
{
//HtmlCommandNavigation
super.encodeBegin(facesContext, component);
}
}
public void encodeChildren(FacesContext facesContext, UIComponent component) throws IOException
{
if (component instanceof HtmlCommandNavigation)
{
//HtmlCommandNavigation
super.encodeChildren(facesContext, component);
}
}
public void encodeEnd(FacesContext facesContext, UIComponent component) throws IOException
{
if (component instanceof HtmlCommandNavigation)
{
//HtmlCommandNavigation
super.encodeEnd(facesContext, component);
return;
}
RendererUtils.checkParamValidity(facesContext, component, HtmlPanelNavigation.class);
ResponseWriter writer = facesContext.getResponseWriter();
HtmlPanelNavigation panelNav = (HtmlPanelNavigation)component;
if (panelNav.getChildCount() > 0)
{
HtmlRendererUtils.writePrettyLineSeparator(facesContext);
writer.startElement(HTML.TABLE_ELEM, component);
HtmlRendererUtils.renderHTMLAttributes(writer, panelNav, HTML.TABLE_PASSTHROUGH_ATTRIBUTES);
boolean isBorderAlreadyDefined = component.getAttributes().containsKey(HTML.BORDER_ATTR);
if (panelNav.getStyle() == null && panelNav.getStyleClass() == null && !isBorderAlreadyDefined)
{
writer.writeAttribute(HTML.BORDER_ATTR, ZERO_INTEGER, null);
}
renderChildren(facesContext, writer, panelNav, panelNav.getChildren(), 0);
HtmlRendererUtils.writePrettyLineSeparator(facesContext);
writer.endElement(HTML.TABLE_ELEM);
}
else
{
if (log.isWarnEnabled()) log.warn("Navigation panel without children.");
}
}
protected void renderChildren(FacesContext facesContext,
ResponseWriter writer,
HtmlPanelNavigation panelNav,
List children,
int level)
throws IOException
{
for (Iterator it = children.iterator(); it.hasNext(); )
{
UIComponent child = (UIComponent)it.next();
if (!child.isRendered()) continue;
if (child instanceof HtmlCommandNavigation)
{
//navigation item
HtmlRendererUtils.writePrettyLineSeparator(facesContext);
String style = getNavigationItemStyle(panelNav, (HtmlCommandNavigation)child);
String styleClass = getNavigationItemClass(panelNav, (HtmlCommandNavigation)child);
writer.startElement(HTML.TR_ELEM, panelNav);
writer.startElement(HTML.TD_ELEM, panelNav);
writeStyleAttributes(writer, style, styleClass);
if (style != null || styleClass != null)
{
writer.startElement(HTML.SPAN_ELEM, panelNav);
writeStyleAttributes(writer, style, styleClass);
}
indent(writer, level);
child.encodeBegin(facesContext);
child.encodeEnd(facesContext);
if (style != null || styleClass != null)
{
writer.endElement(HTML.SPAN_ELEM);
}
writer.endElement(HTML.TD_ELEM);
writer.endElement(HTML.TR_ELEM);
if (child.getChildCount() > 0)
{
renderChildren(facesContext, writer, panelNav, child.getChildren(), level + 1);
}
}
else
{
//separator
HtmlRendererUtils.writePrettyLineSeparator(facesContext);
String style = panelNav.getSeparatorStyle();
String styleClass = panelNav.getSeparatorClass();
writer.startElement(HTML.TR_ELEM, panelNav);
writer.startElement(HTML.TD_ELEM, panelNav);
writeStyleAttributes(writer, style, styleClass);
if (style != null || styleClass != null)
{
writer.startElement(HTML.SPAN_ELEM, panelNav);
writeStyleAttributes(writer, style, styleClass);
}
indent(writer, level);
RendererUtils.renderChild(facesContext, child);
if (style != null || styleClass != null)
{
writer.endElement(HTML.SPAN_ELEM);
}
writer.endElement(HTML.TD_ELEM);
writer.endElement(HTML.TR_ELEM);
}
}
}
protected void indent(ResponseWriter writer, int level)
throws IOException
{
StringBuffer buf = new StringBuffer();
for (int i = 0; i < level; i++)
{
buf.append("    ");
}
writer.write(buf.toString());
}
protected String getNavigationItemStyle(HtmlPanelNavigation navPanel,
HtmlCommandNavigation navItem)
{
if (navItem.isActive())
{
return navPanel.getActiveItemStyle();
}
else if (navItem.isOpen())
{
return navPanel.getOpenItemStyle();
}
else
{
return navPanel.getItemStyle();
}
}
protected String getNavigationItemClass(HtmlPanelNavigation navPanel,
HtmlCommandNavigation navItem)
{
// MYFACES-117, if a styleClass is supplied for a HtmlCommandNavigation,
// panelNavigation active/open/normal styles for items will be overriden
if (navItem.getStyleClass() != null)
{
return navItem.getStyleClass();
}
if (navItem.isActive())
{
return navPanel.getActiveItemClass();
}
else if (navItem.isOpen())
{
return navPanel.getOpenItemClass();
}
else
{
return navPanel.getItemClass();
}
}
protected void writeStyleAttributes(ResponseWriter writer,
String style,
String styleClass)
throws IOException
{
HtmlRendererUtils.renderHTMLAttribute(writer, HTML.STYLE_ATTR, HTML.STYLE_ATTR, style);
HtmlRendererUtils.renderHTMLAttribute(writer, HTML.STYLE_CLASS_ATTR, HTML.STYLE_CLASS_ATTR, styleClass);
}
protected String getStyle(FacesContext facesContext, UIComponent link)
{
if (!(link instanceof HtmlCommandNavigation))
{
throw new IllegalArgumentException();
}
UIComponent navPanel = link.getParent();
while (navPanel != null && !(navPanel instanceof HtmlPanelNavigation))
{
navPanel = navPanel.getParent();
}
if (navPanel == null)
{
throw new IllegalStateException("HtmlCommandNavigation not nested in HtmlPanelNavigation!?");
}
HtmlCommandNavigation navItem = (HtmlCommandNavigation)link;
if (navItem.isActive())
{
return ((HtmlPanelNavigation)navPanel).getActiveItemStyle();
}
else if (navItem.isOpen())
{
return ((HtmlPanelNavigation)navPanel).getOpenItemStyle();
}
else
{
return ((HtmlPanelNavigation)navPanel).getItemStyle();
}
}
protected String getStyleClass(FacesContext facesContext, UIComponent link)
{
if (!(link instanceof HtmlCommandNavigation))
{
throw new IllegalArgumentException();
}
UIComponent navPanel = link.getParent();
while (navPanel != null && !(navPanel instanceof HtmlPanelNavigation))
{
navPanel = navPanel.getParent();
}
if (navPanel == null)
{
throw new IllegalStateException("HtmlCommandNavigation not nested in HtmlPanelNavigation!?");
}
HtmlCommandNavigation navItem = (HtmlCommandNavigation)link;
if (navItem.isActive())
{
return ((HtmlPanelNavigation)navPanel).getActiveItemClass();
}
else if (navItem.isOpen())
{
return ((HtmlPanelNavigation)navPanel).getOpenItemClass();
}
else
{
return ((HtmlPanelNavigation)navPanel).getItemClass();
}
}
}