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// CommandScriptRenderer.java
package com.sun.faces.renderkit.html_basic;
import java.io.IOException;
import java.util.logging.Level;
import java.util.regex.Pattern;
import javax.faces.component.UICommand;
import javax.faces.component.UIComponent;
import javax.faces.component.html.HtmlCommandScript;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.faces.event.ActionEvent;
import javax.faces.event.PhaseId;
import com.sun.faces.renderkit.RenderKitUtils;
/**
* <b>CommandScriptRenderer</b> is a class that renders the current value of
* <code>UICommand<code> as a Script that acts like an Ajax Button.
*/
public class CommandScriptRenderer extends HtmlBasicRenderer {
private static final Pattern PATTERN_NAME = Pattern.compile("[$a-z_](\\.?[$\\w])*", Pattern.CASE_INSENSITIVE);
@Override
public void decode(FacesContext context, UIComponent component) {
rendererParamsNotNull(context, component);
if (!shouldDecode(component)) {
return;
}
String clientId = component.getClientId(context);
if (RenderKitUtils.isPartialOrBehaviorAction(context, clientId)) {
UICommand command = (UICommand) component;
ActionEvent event = new ActionEvent(command);
event.setPhaseId(command.isImmediate() ? PhaseId.APPLY_REQUEST_VALUES : PhaseId.INVOKE_APPLICATION);
command.queueEvent(event);
if (logger.isLoggable(Level.FINE)) {
logger.fine("This commandScript resulted in form submission ActionEvent queued.");
}
}
}
@Override
public void encodeBegin(FacesContext context, UIComponent component) throws IOException {
rendererParamsNotNull(context, component);
if (!shouldEncode(component)) {
return;
}
HtmlCommandScript commandScript = (HtmlCommandScript) component;
String clientId = commandScript.getClientId(context);
if (RenderKitUtils.getForm(commandScript, context) == null) {
throw new IllegalArgumentException("commandScript ID " + clientId + " must be placed in UIForm");
}
String name = commandScript.getName();
if (name == null || !PATTERN_NAME.matcher(name).matches()) {
throw new IllegalArgumentException("commandScript ID " + clientId + " has an illegal name: '" + name + "'");
}
RenderKitUtils.renderJsfJsIfNecessary(context);
ResponseWriter writer = context.getResponseWriter();
assert (writer != null);
writer.startElement("span", commandScript);
writer.writeAttribute("id", clientId, "id");
writer.startElement("script", commandScript);
writer.writeAttribute("type", "text/javascript", "type");
RenderKitUtils.renderFunction(context, component, getBehaviorParameters(commandScript), clientId);
}
@Override
public void encodeEnd(FacesContext context, UIComponent component) throws IOException {
rendererParamsNotNull(context, component);
if (!shouldEncode(component)) {
return;
}
ResponseWriter writer = context.getResponseWriter();
assert (writer != null);
writer.endElement("script");
writer.endElement("span");
}
@Override
public boolean getRendersChildren() {
return false;
}
}