org.primefaces.component.focus.FocusRenderer Maven / Gradle / Ivy
/*
* Copyright 2009,2010 Prime Technology.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.primefaces.component.focus;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import javax.faces.FacesException;
import javax.faces.application.FacesMessage;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import org.primefaces.expression.SearchExpressionFacade;
import org.primefaces.renderkit.CoreRenderer;
public class FocusRenderer extends CoreRenderer {
private final static Map severityOrdinals = new HashMap();
static {
severityOrdinals.put("info", FacesMessage.SEVERITY_INFO.getOrdinal());
severityOrdinals.put("warn", FacesMessage.SEVERITY_WARN.getOrdinal());
severityOrdinals.put("error", FacesMessage.SEVERITY_ERROR.getOrdinal());
severityOrdinals.put("fatal", FacesMessage.SEVERITY_FATAL.getOrdinal());
}
@Override
public void encodeEnd(FacesContext context, UIComponent component) throws IOException {
Focus focus = (Focus) component;
ResponseWriter writer = context.getResponseWriter();
//Dummy markup for ajax update
writer.startElement("span", focus);
writer.writeAttribute("id", focus.getClientId(context), "id");
writer.endElement("span");
writer.startElement("script", focus);
writer.writeAttribute("type", "text/javascript", null);
if(focus.getFor() != null) {
encodeExplicitFocus(context, focus);
} else {
encodeImplicitFocus(context, focus);
}
writer.endElement("script");
}
protected void encodeExplicitFocus(FacesContext context, Focus focus) throws IOException {
ResponseWriter writer = context.getResponseWriter();
UIComponent forComponent = SearchExpressionFacade.resolveComponent(
context, focus, focus.getFor());
String clientId = forComponent.getClientId(context);
writer.write("$(function(){");
writer.write("PrimeFaces.focus('" + clientId +"');");
writer.write("});");
}
protected void encodeImplicitFocus(FacesContext context, Focus focus) throws IOException {
ResponseWriter writer = context.getResponseWriter();
String invalidClientId = findFirstInvalidComponentClientId(context, focus);
writer.write("$(function(){");
if(invalidClientId != null){
writer.write("PrimeFaces.focus('" + invalidClientId +"');");
}
else if(focus.getContext() != null) {
UIComponent focusContext = SearchExpressionFacade.resolveComponent(
context, focus, focus.getContext());
writer.write("PrimeFaces.focus(null, '" + focusContext.getClientId(context) +"');");
}
else {
writer.write("PrimeFaces.focus();");
}
writer.write("});");
}
protected String findFirstInvalidComponentClientId(FacesContext context, Focus focus) {
int minSeverityOrdinal = severityOrdinals.get(focus.getMinSeverity());
for(Iterator iterator = context.getClientIdsWithMessages(); iterator.hasNext();) {
String clientId = iterator.next();
for(Iterator messageIter = context.getMessages(clientId); messageIter.hasNext();) {
FacesMessage message = messageIter.next();
if(message.getSeverity().getOrdinal() >= minSeverityOrdinal)
return clientId;
}
}
return null;
}
}