package org.jboss.seam.ui.renderkit;
import static org.jboss.seam.ui.util.HTML.SCRIPT_ELEM;
import static org.jboss.seam.ui.util.HTML.SCRIPT_LANGUAGE_ATTR;
import static org.jboss.seam.ui.util.HTML.SCRIPT_LANGUAGE_JAVASCRIPT;
import static org.jboss.seam.ui.util.HTML.SCRIPT_TYPE_ATTR;
import static org.jboss.seam.ui.util.HTML.SCRIPT_TYPE_TEXT_JAVASCRIPT;
import java.io.IOException;
import javax.faces.component.UIComponent;
import javax.faces.component.UIParameter;
import javax.faces.component.UIViewRoot;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import org.jboss.seam.log.LogProvider;
import org.jboss.seam.ui.util.cdk.RendererBase;
/**
* @author Pete Muir
*
*/
public abstract class CommandButtonParameterRendererBase extends RendererBase
{
protected abstract LogProvider getLog();
protected abstract String getParameterName();
@Override
protected void doEncodeEnd(ResponseWriter writer, FacesContext context, UIComponent component)
throws IOException
{
UIComponent actionComponent = component.getParent();
UIComponent form = getUtils().getForm(actionComponent);
UIParameter parameter = (UIParameter) component;
if (getUtils().isCommandButton(actionComponent))
{
String formId = form.getClientId(context);
writer.startElement(SCRIPT_ELEM, component);
writer.writeAttribute(SCRIPT_LANGUAGE_ATTR, SCRIPT_LANGUAGE_JAVASCRIPT, SCRIPT_LANGUAGE_ATTR);
writer.writeAttribute(SCRIPT_TYPE_ATTR, SCRIPT_TYPE_TEXT_JAVASCRIPT, SCRIPT_TYPE_ATTR);
if (actionComponent.getId().startsWith(UIViewRoot.UNIQUE_ID_PREFIX))
{
getLog().warn("Must set an id for the command buttons with s:conversationPropagation");
}
String functionBody =
"{" +
"if (document.getElementById)" +
"{" +
"var form = document.getElementById('" + formId + "');" +
"var input = document.createElement('input');" +
"if (document.all)" +
"{ " + // what follows should work with NN6 but doesn't in M14"
"input.type = 'hidden';" +
"input.name = '" + getParameterName() + "';" +
"input.value = '" + parameter.getValue() + "';" +
"}" +
"else if (document.getElementById) " +
"{" + // so here is theNN6 workaround
"input.setAttribute('type', 'hidden');" +
"input.setAttribute('name', '" + getParameterName() + "');" +
"input.setAttribute('value', '" + parameter.getValue() + "');" +
"}" +
"form.appendChild(input);" +
"return true;" +
"}" +
"}";
String functionName = "cp_" + actionComponent.getId();
String functionCode =
"var " + functionName + " = " +
"new Function(\"event\", \"" + functionBody + "\");";
writer.write(functionCode);
// We are either written before the HTML element (e.g. a:commandButton)
// In this case we can simply prepend to the existing onClick
String existingOnClick = (String) actionComponent.getAttributes().get("onclick");
actionComponent.getAttributes().put("onclick", functionName + "();" + existingOnClick);
// But we also might be written after (e.g. JSF RI h:commandButton
// In this case we can use event capture
String functionRegister =
"if (document.getElementById('" + actionComponent.getClientId(context) + "'))" +
"{" +
"document.getElementById('" + actionComponent.getClientId(context) + "').onclick = new Function(\"event\", \"" + functionBody + "\");" +
"}";
writer.write(functionRegister);
writer.endElement("script");
}
}
}