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EE4J Compatible Implementation for Jakarta Faces API
/*
* Copyright (c) 1997, 2020 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
// FormRenderer.java
package com.sun.faces.renderkit.html_basic;
import static com.sun.faces.renderkit.RenderKitUtils.getParameterName;
import java.io.IOException;
import java.util.ListIterator;
import java.util.Map;
import java.util.logging.Level;
import com.sun.faces.config.WebConfiguration;
import com.sun.faces.config.WebConfiguration.BooleanWebContextInitParameter;
import com.sun.faces.renderkit.Attribute;
import com.sun.faces.renderkit.AttributeManager;
import com.sun.faces.renderkit.RenderKitUtils;
import jakarta.faces.component.UIComponent;
import jakarta.faces.component.UIForm;
import jakarta.faces.component.UIViewRoot;
import jakarta.faces.context.ExternalContext;
import jakarta.faces.context.FacesContext;
import jakarta.faces.context.ResponseWriter;
/**
* FormRenderer is a class that renders a UIForm as a Form.
* */
public class FormRenderer extends HtmlBasicRenderer {
private static final Attribute[] ATTRIBUTES = AttributeManager.getAttributes(AttributeManager.Key.FORMFORM);
private boolean writeStateAtEnd;
// ------------------------------------------------------------ Constructors
public FormRenderer() {
WebConfiguration webConfig = WebConfiguration.getInstance();
writeStateAtEnd = webConfig.isOptionEnabled(BooleanWebContextInitParameter.WriteStateAtFormEnd);
}
// ---------------------------------------------------------- Public Methods
@Override
public void decode(FacesContext context, UIComponent component) {
rendererParamsNotNull(context, component);
String clientId = decodeBehaviors(context, component);
if (clientId == null) {
clientId = component.getClientId(context);
}
// Was our form the one that was submitted? If so, we need to set
// the indicator accordingly..
Map requestParameterMap = context.getExternalContext().getRequestParameterMap();
if (requestParameterMap.containsKey(clientId)) {
if (logger.isLoggable(Level.FINE)) {
logger.log(Level.FINE, "UIForm with client ID {0}, submitted", clientId);
}
((UIForm) component).setSubmitted(true);
} else {
((UIForm) component).setSubmitted(false);
}
}
@Override
public void encodeBegin(FacesContext context, UIComponent component) throws IOException {
rendererParamsNotNull(context, component);
if (!shouldEncode(component)) {
return;
}
ResponseWriter writer = context.getResponseWriter();
assert writer != null;
String clientId = component.getClientId(context);
// since method and action are rendered here they are not added
// to the pass through attributes in Util class.
writer.write('\n');
writer.startElement("form", component);
writer.writeAttribute("id", clientId, "clientId");
writer.writeAttribute("name", clientId, "name");
writer.writeAttribute("method", "post", null);
writer.writeAttribute("action", getActionStr(context), null);
String styleClass = (String) component.getAttributes().get("styleClass");
if (styleClass != null) {
writer.writeAttribute("class", styleClass, "styleClass");
}
String acceptcharset = (String) component.getAttributes().get("acceptcharset");
if (acceptcharset != null) {
writer.writeAttribute("accept-charset", acceptcharset, "acceptcharset");
}
RenderKitUtils.renderPassThruAttributes(context, writer, component, ATTRIBUTES);
writer.writeText("\n", component, null);
// this hidden field will be checked in the decode method to
// determine if this form has been submitted.
writer.startElement("input", null);
writer.writeAttribute("type", "hidden", "type");
writer.writeAttribute("name", clientId, "clientId");
writer.writeAttribute("value", clientId, "value");
writer.endElement("input");
writer.write('\n');
UIViewRoot viewRoot = context.getViewRoot();
// Write out special hhidden field for partial submits
String viewId = viewRoot.getViewId();
String actionURL = context.getApplication().getViewHandler().getActionURL(context, viewId);
ExternalContext externalContext = context.getExternalContext();
String encodedActionURL = externalContext.encodeActionURL(actionURL);
String encodedPartialActionURL = externalContext.encodePartialActionURL(actionURL);
if (encodedPartialActionURL != null && !encodedPartialActionURL.equals(encodedActionURL)) {
writer.startElement("input", null);
writer.writeAttribute("type", "hidden", "type");
writer.writeAttribute("name", getParameterName(context, "jakarta.faces.encodedURL"), null);
writer.writeAttribute("value", encodedPartialActionURL, "value");
writer.endElement("input");
writer.write('\n');
}
if (!writeStateAtEnd) {
context.getApplication().getViewHandler().writeState(context);
writer.write('\n');
}
}
@Override
public void encodeEnd(FacesContext context, UIComponent component) throws IOException {
rendererParamsNotNull(context, component);
if (!shouldEncode(component)) {
return;
}
// Render the end tag for form
ResponseWriter writer = context.getResponseWriter();
assert writer != null;
// Render ay resources that have been targeted for this form.
UIViewRoot viewRoot = context.getViewRoot();
ListIterator iter = viewRoot.getComponentResources(context, "form").listIterator();
while (iter.hasNext()) {
UIComponent resource = (UIComponent) iter.next();
resource.encodeAll(context);
}
// Render the end tag for form
if (writeStateAtEnd) {
context.getApplication().getViewHandler().writeState(context);
}
writer.writeText("\n", component, null);
writer.endElement("form");
}
// --------------------------------------------------------- Private Methods
/**
* @param context FacesContext for the response we are creating
*
* @return Return the value to be rendered as the action attribute of the form generated for this
* component.
*/
private static String getActionStr(FacesContext context) {
String viewId = context.getViewRoot().getViewId();
String actionURL = context.getApplication().getViewHandler().getActionURL(context, viewId);
return context.getExternalContext().encodeActionURL(actionURL);
}
}