com.sun.faces.ext.render.FocusHTMLRenderer Maven / Gradle / Ivy
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package com.sun.faces.ext.render;
import java.io.IOException;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.faces.render.Renderer;
/**
* Renderer class that emits HTML and JavaScript to set the focus to a given field.
*
* @author driscoll
*/
public class FocusHTMLRenderer extends Renderer {
@Override
public void encodeEnd(FacesContext context, UIComponent component) throws IOException {
String forID = (String) component.getAttributes().get("for");
ResponseWriter writer = context.getResponseWriter();
// XXX - I'd still like to get the parentID, but need to add a check if it's a form or not...
//UIComponent parentComponent = component.getParent();
//String parentID = parentComponent.getClientId(context);
//String targetID = parentID+":"+forID;
String targetID = forID;
writer.startElement("script", component);
writer.writeAttribute("type", "text/javascript", null);
writer.writeText("setFocus('",null);
writer.writeText(targetID, null);
writer.writeText("');\n",null);
writer.writeText("function setFocus(elementId) { var element = " +
"document.getElementById(elementId); if (element && element.focus) " +
"{ element.focus(); } }",null);
writer.endElement("script");
}
}