/*
* Copyright 1999-2002,2004 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.cocoon.portal.layout.renderer.aspect.impl;
import java.util.Collections;
import java.util.Iterator;
import java.util.Map;
import java.util.List;
import java.util.ArrayList;
import org.apache.avalon.framework.parameters.ParameterException;
import org.apache.avalon.framework.parameters.Parameters;
import org.apache.cocoon.portal.PortalService;
import org.apache.cocoon.portal.aspect.impl.DefaultAspectDescription;
import org.apache.cocoon.portal.event.impl.ChangeAspectDataEvent;
import org.apache.cocoon.portal.layout.CompositeLayout;
import org.apache.cocoon.portal.layout.Item;
import org.apache.cocoon.portal.layout.Layout;
import org.apache.cocoon.portal.layout.NamedItem;
import org.apache.cocoon.portal.layout.renderer.aspect.RendererAspectContext;
import org.apache.cocoon.xml.AttributesImpl;
import org.apache.cocoon.xml.XMLUtils;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
/**
* <h2>Example XML:</h2>
* <pre>
* <composite>
* <named-item name="..." parameter="link-event"/>
* <named-item name="..." selected="true">
* <!-- output from processing layout -->
* </named-item>
* <named-item name="..." parameter="link-event"/>
* <named-item name="..." parameter="link-event"/>
* </composite>
* </pre>
*
* <h2>Example XML with sub-navigation:</h2>
* <pre>
* <composite>
* <named-item name="..." parameter="link-event"/>
* <named-item name="..." selected="true">
* <!-- output from processing layout -->
* </named-item>
* <named-item name="..." parameter="link-event"/>
* <named-item name="..." parameter="link-event">
* <<i>child-tag-name</i>>
* <named-item name="..." parameter="link-event"/>
* <named-item name="..." parameter="link-event"/>
* </<i>child-tag-name</i>>
* </named-item>
* </composite>
* </pre>
*
* <h2>Applicable to:</h2>
* <ul>
* <li>{@link org.apache.cocoon.portal.layout.CompositeLayout}</li>
* </ul>
*
* <h2>Parameters</h2>
* <table><tbody>
* <tr><th>store</th><td></td><td>req</td><td>String</td><td><code>null</code></td></tr>
* <tr><th>aspect-name</th><td>Aspect holding the current tab state.</td><td>req</td><td>String</td><td><code>"tab"</code></td></tr>
* <tr><th>tag-name</th><td>Name of the tag enclosing the following output.</td>
* <td></td><td>String</td><td><code>"composite"</code></td></tr>
* <tr><th>root-tag</th><td>Should a tag enclosing the following output be generated?</td>
* <td></td><td>boolean</td><td><code>true</code></td></tr>
* <tr><th>child-tag-name</th><td>The name of the tag to enclose named items (i.e. the subnavigation)
* of non-selected items. If a value is not specified then no sub-navigation named items will be
* generated.</td>
* <td></td><td>String</td><td><code>""</code></td></tr>
* </tbody></table>
*
* @author <a href="mailto:cziegeler@s-und-n.de">Carsten Ziegeler</a>
* @author <a href="mailto:volker.schmitt@basf-it-services.com">Volker Schmitt</a>
*
* @version CVS $Id: TabContentAspect.java 56906 2004-11-08 06:07:15Z rgoers $
*/
public class TabContentAspect
extends CompositeContentAspect {
/* (non-Javadoc)
* @see org.apache.cocoon.portal.layout.renderer.RendererAspect#toSAX(org.apache.cocoon.portal.layout.renderer.RendererAspectContext, org.apache.cocoon.portal.layout.Layout, org.apache.cocoon.portal.PortalService, org.xml.sax.ContentHandler)
*/
public void toSAX(RendererAspectContext context,
Layout layout,
PortalService service,
ContentHandler handler)
throws SAXException {
if (layout instanceof CompositeLayout) {
TabPreparedConfiguration config = (TabPreparedConfiguration)context.getAspectConfiguration();
if ( config.rootTag ) {
XMLUtils.startElement(handler, config.tagName);
}
AttributesImpl attributes = new AttributesImpl();
CompositeLayout tabLayout = (CompositeLayout) layout;
// selected tab
Integer data = (Integer) layout.getAspectData(config.aspectName);
int selected = data.intValue();
// loop over all tabs
for (int j = 0; j < tabLayout.getSize(); j++) {
Item tab = tabLayout.getItem(j);
ChangeAspectDataEvent event = null;
// open named-item tag
attributes.clear();
if ( tab instanceof NamedItem ) {
attributes.addCDATAAttribute("name", String.valueOf(((NamedItem)tab).getName()));
}
if (j == selected) {
attributes.addCDATAAttribute("selected", "true");
}
event = new ChangeAspectDataEvent(tabLayout, config.aspectName, new Integer(j));
attributes.addCDATAAttribute("parameter", service.getComponentManager().getLinkService().getLinkURI(event));
// add parameters
final Iterator iter = tab.getParameters().entrySet().iterator();
while ( iter.hasNext() ) {
final Map.Entry entry = (Map.Entry) iter.next();
attributes.addCDATAAttribute((String)entry.getKey(), (String)entry.getValue());
}
XMLUtils.startElement(handler, "named-item", attributes);
if (j == selected) {
this.processLayout(tab.getLayout(), service, handler);
} else if (config.showAllNav) {
List events = new ArrayList();
events.add(event);
this.processNav(context, tab.getLayout(), service, handler, events);
}
// close named-item tag
XMLUtils.endElement(handler, "named-item");
}
if ( config.rootTag ) {
XMLUtils.endElement(handler, config.tagName);
}
} else {
throw new SAXException("Wrong layout type, TabLayout expected: " + layout.getClass().getName());
}
}
/**
* Return the aspects required for this renderer
* @return An iterator for the aspect descriptions or null.
*/
public Iterator getAspectDescriptions(Object configuration) {
TabPreparedConfiguration pc = (TabPreparedConfiguration)configuration;
DefaultAspectDescription desc = new DefaultAspectDescription();
desc.setName(pc.aspectName);
desc.setClassName("java.lang.Integer");
desc.setPersistence(pc.store);
desc.setAutoCreate(true);
return Collections.singletonList(desc).iterator();
}
/*
* Generate the sub navigation for non-selected tabs
* @param context
* @param layout
* @param service
* @param handler
* @throws SAXException
*/
private void processNav(RendererAspectContext context,
Layout layout,
PortalService service,
ContentHandler handler,
List parentEvents)
throws SAXException {
if (layout instanceof CompositeLayout) {
CompositeLayout tabLayout = (CompositeLayout)layout;
if (tabLayout.getSize() == 0) {
return;
}
TabPreparedConfiguration config =
(TabPreparedConfiguration) context.getAspectConfiguration();
AttributesImpl attributes = new AttributesImpl();
boolean subNav = false;
// loop over all tabs
for (int j = 0; j < tabLayout.getSize(); j++) {
Item tab = tabLayout.getItem(j);
// open named-item tag
attributes.clear();
if (tab instanceof NamedItem) {
if (!subNav) {
XMLUtils.startElement(handler, config.childTagName);
subNav = true;
}
attributes.addCDATAAttribute("name",
String.valueOf(((NamedItem) tab).getName()));
ChangeAspectDataEvent event = new ChangeAspectDataEvent(tabLayout,
config.aspectName, new Integer(j));
List events = new ArrayList(parentEvents);
events.add(event);
attributes.addCDATAAttribute("parameter",
service.getComponentManager().getLinkService().getLinkURI(events));
// add parameters
final Iterator iter = tab.getParameters().entrySet().iterator();
while (iter.hasNext()) {
final Map.Entry entry = (Map.Entry) iter.next();
attributes.addCDATAAttribute((String) entry.getKey(),
(String) entry.getValue());
}
XMLUtils.startElement(handler, "named-item", attributes);
this.processNav(context, tab.getLayout(), service, handler, events);
// close named-item tag
XMLUtils.endElement(handler, "named-item");
}
}
// close sub-nav tag
if (subNav) {
XMLUtils.endElement(handler, config.childTagName);
}
}
}
protected class TabPreparedConfiguration extends PreparedConfiguration {
public String aspectName;
public String store;
public boolean showAllNav = false;
public String childTagName;
public void takeValues(TabPreparedConfiguration from) {
super.takeValues(from);
this.aspectName = from.aspectName;
this.store = from.store;
this.showAllNav = from.showAllNav;
this.childTagName = from.childTagName;
}
}
/* (non-Javadoc)
* @see org.apache.cocoon.portal.layout.renderer.aspect.RendererAspect#prepareConfiguration(org.apache.avalon.framework.parameters.Parameters)
*/
public Object prepareConfiguration(Parameters configuration)
throws ParameterException {
TabPreparedConfiguration pc = new TabPreparedConfiguration();
pc.takeValues((PreparedConfiguration)super.prepareConfiguration(configuration));
pc.aspectName = configuration.getParameter("aspect-name", "tab");
pc.store = configuration.getParameter("store");
pc.childTagName = configuration.getParameter("child-tag-name", "");
if (!pc.childTagName.equals("")) {
pc.showAllNav = true;
}
return pc;
}
}