package org.appfuse.webapp.components;
import org.apache.tapestry5.BindingConstants;
import org.apache.tapestry5.ClientElement;
import org.apache.tapestry5.ComponentResources;
import org.apache.tapestry5.MarkupWriter;
import org.apache.tapestry5.annotations.Parameter;
import org.apache.tapestry5.annotations.Property;
import org.apache.tapestry5.annotations.SupportsInformalParameters;
import org.apache.tapestry5.dom.Element;
import org.apache.tapestry5.ioc.annotations.Inject;
import org.apache.tapestry5.services.Environment;
import org.apache.tapestry5.services.javascript.JavaScriptSupport;
import org.appfuse.webapp.internal.MenuContext;
/**
* Menu component. This is essentially generating an unordered list
* (via ;lt&ul;gt<&/ul;gt& tags) wrapping the menu items
*
* @author Serge Eby
*/
@SupportsInformalParameters
public class Menu implements ClientElement {
/**
* The id parameter - used mainly for css customization
*/
@Parameter(name = "id", defaultPrefix = BindingConstants.LITERAL)
private String idParameter;
/**
* The menu class name
*/
@Property
@Parameter(name = "class", defaultPrefix = BindingConstants.LITERAL)
private String className;
@Parameter(defaultPrefix = BindingConstants.LITERAL)
private String active;
@Inject
private JavaScriptSupport javaScriptSupport;
@Inject
private ComponentResources resources;
@Inject
private Environment environment;
private String clientId;
public String getClientId() {
return clientId;
}
public String getMenuClass() {
return className;
}
void beginRender(MarkupWriter writer) {
clientId = resources.isBound("id") ? idParameter : javaScriptSupport.allocateClientId(resources);
Element e = writer.element("ul",
"id", clientId);
resources.renderInformalParameters(writer);
if (className != null) {
e.addClassName(className);
}
environment.push(MenuContext.class, new MenuContext() {
public boolean isActive(String itemId) {
return active != null && active.equalsIgnoreCase(itemId);
}
});
}
void afterRender(MarkupWriter writer) {
writer.end(); // ul
environment.pop(MenuContext.class);
}
}