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* Copyright 2004 Sun Microsystems, Inc. All Rights Reserved.
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* without modification, are permitted provided that the following
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*
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* - Redistribution in binary form must reproduce the above
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* disclaimer in the documentation and/or other materials
* provided with the distribution.
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* Neither the name of Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any
* kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
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package org.apache.cocoon.faces.samples.components.renderkit;
import org.apache.cocoon.faces.samples.components.components.AreaComponent;
import org.apache.cocoon.faces.samples.components.components.MapComponent;
import org.apache.cocoon.faces.samples.components.model.ImageArea;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import java.io.IOException;
/**
* This class converts the internal representation of a <code>UIArea</code>
* component into the output stream associated with the response to a
* particular request.
*/
public class AreaRenderer extends BaseRenderer {
// -------------------------------------------------------- Renderer Methods
/**
* <p>No decoding is required.</p>
*
* @param context <code>FacesContext</code>for the current request
* @param component <code>UIComponent</code> to be decoded
*/
public void decode(FacesContext context, UIComponent component) {
if ((context == null) || (component == null)) {
throw new NullPointerException();
}
}
/**
* <p>No begin encoding is required.</p>
*
* @param context <code>FacesContext</code>for the current request
* @param component <code>UIComponent</code> to be decoded
*/
public void encodeBegin(FacesContext context, UIComponent component)
throws IOException {
if ((context == null) || (component == null)) {
throw new NullPointerException();
}
}
/**
* <p>No children encoding is required.</p>
*
* @param context <code>FacesContext</code>for the current request
* @param component <code>UIComponent</code> to be decoded
*/
public void encodeChildren(FacesContext context, UIComponent component)
throws IOException {
if ((context == null) || (component == null)) {
throw new NullPointerException();
}
}
/**
* <p>Encode this component.</p>
*
* @param context <code>FacesContext</code>for the current request
* @param component <code>UIComponent</code> to be decoded
*/
public void encodeEnd(FacesContext context, UIComponent component)
throws IOException {
if ((context == null) || (component == null)) {
throw new NullPointerException();
}
AreaComponent area = (AreaComponent) component;
String targetImageId =
area.findComponent(area.getTargetImage()).getClientId(context);
ImageArea iarea = (ImageArea) area.getValue();
ResponseWriter writer = context.getResponseWriter();
StringBuffer sb = null;
writer.startElement("area", area);
writer.writeAttribute("alt", iarea.getAlt(), "alt");
writer.writeAttribute("coords", iarea.getCoords(), "coords");
writer.writeAttribute("shape", iarea.getShape(), "shape");
// PENDING(craigmcc) - onmouseout only works on first form of a page
sb =
new StringBuffer("document.forms[0]['").append(targetImageId)
.append("'].src='");
sb.append(
getURI(context, (String) area.getAttributes().get("onmouseout")));
sb.append("'");
writer.writeAttribute("onmouseout", sb.toString(), "onmouseout");
// PENDING(craigmcc) - onmouseover only works on first form of a page
sb =
new StringBuffer("document.forms[0]['").append(targetImageId)
.append("'].src='");
sb.append(
getURI(context, (String) area.getAttributes().get("onmouseover")));
sb.append("'");
writer.writeAttribute("onmouseover", sb.toString(), "onmouseover");
// PENDING(craigmcc) - onclick only works on first form of a page
sb = new StringBuffer("document.forms[0]['");
sb.append(getName(context, area));
sb.append("'].value='");
sb.append(iarea.getAlt());
sb.append("'; document.forms[0].submit()");
writer.writeAttribute("onclick", sb.toString(), "value");
writer.endElement("area");
}
// --------------------------------------------------------- Private Methods
/**
* <p>Return the calculated name for the hidden input field.</p>
*
* @param context Context for the current request
* @param component Component we are rendering
*/
private String getName(FacesContext context, UIComponent component) {
while (component != null) {
if (component instanceof MapComponent) {
return (component.getId() + "_current");
}
component = component.getParent();
}
throw new IllegalArgumentException();
}
/**
* <p>Return the path to be passed into JavaScript for the specified
* value.</p>
*
* @param context Context for the current request
* @param value Partial path to be (potentially) modified
*/
private String getURI(FacesContext context, String value) {
if (value.startsWith("/")) {
return (context.getExternalContext().getRequestContextPath() +
value);
} else {
return (value);
}
}
}