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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
*/
// OutputLinkRenderer.java
package com.sun.faces.renderkit.html_basic;
import static com.sun.faces.util.Util.componentIsDisabled;
import static java.util.logging.Level.FINE;
import java.io.IOException;
import java.net.URLEncoder;
import com.sun.faces.renderkit.Attribute;
import com.sun.faces.renderkit.AttributeManager;
import com.sun.faces.renderkit.RenderKitUtils;
import com.sun.faces.util.Util;
import jakarta.faces.component.UIComponent;
import jakarta.faces.component.UIOutput;
import jakarta.faces.context.FacesContext;
import jakarta.faces.context.ResponseWriter;
/**
* OutputLinkRenderer is a class ...
*
* Lifetime And Scope
*
*/
public class OutputLinkRenderer extends LinkRenderer {
private static final Attribute[] ATTRIBUTES = AttributeManager.getAttributes(AttributeManager.Key.OUTPUTLINK);
// ---------------------------------------------------------- Public Methods
@Override
public void decode(FacesContext context, UIComponent component) {
rendererParamsNotNull(context, component);
if (shouldDecode(component)) {
decodeBehaviors(context, component);
}
}
@Override
public void encodeBegin(FacesContext context, UIComponent component) throws IOException {
rendererParamsNotNull(context, component);
UIOutput output = (UIOutput) component;
boolean componentDisabled = false;
if (output.getAttributes().get("disabled") != null) {
if (output.getAttributes().get("disabled").equals(Boolean.TRUE)) {
componentDisabled = true;
}
}
if (componentDisabled) {
renderAsDisabled(context, output);
} else {
renderAsActive(context, output);
}
}
@Override
public void encodeChildren(FacesContext context, UIComponent component) throws IOException {
rendererParamsNotNull(context, component);
if (!shouldEncodeChildren(component)) {
return;
}
if (component.getChildCount() > 0) {
for (UIComponent kid : component.getChildren()) {
encodeRecursive(context, kid);
}
}
}
@Override
public void encodeEnd(FacesContext context, UIComponent component) throws IOException {
rendererParamsNotNull(context, component);
if (!shouldEncode(component)) {
return;
}
ResponseWriter writer = context.getResponseWriter();
assert writer != null;
if (Boolean.TRUE.equals(component.getAttributes().get("disabled"))) {
writer.endElement("span");
} else {
// Write Anchor inline elements
// Done writing Anchor element
writer.endElement("a");
}
}
@Override
public boolean getRendersChildren() {
return true;
}
// ------------------------------------------------------- Protected Methods
protected String getFragment(UIComponent component) {
String fragment = (String) component.getAttributes().get("fragment");
fragment = fragment != null ? fragment.trim() : "";
if (fragment.length() > 0) {
fragment = "#" + fragment;
}
return fragment;
}
@Override
protected Object getValue(UIComponent component) {
if (componentIsDisabled(component)) {
return null;
}
return ((UIOutput) component).getValue();
}
@Override
protected void renderAsActive(FacesContext context, UIComponent component) throws IOException {
String hrefVal = getCurrentValue(context, component);
if (logger.isLoggable(FINE)) {
logger.fine("Value to be rendered " + hrefVal);
}
// suppress rendering if "rendered" property on the output is
// false
if (!component.isRendered()) {
if (logger.isLoggable(FINE)) {
logger.fine("End encoding component " + component.getId() + " since " + "rendered attribute is set to false ");
}
return;
}
ResponseWriter writer = context.getResponseWriter();
assert writer != null;
writer.startElement("a", component);
String writtenId = writeIdAttributeIfNecessary(context, writer, component);
if (null != writtenId) {
writer.writeAttribute("name", writtenId, "name");
}
// render an empty value for href if it is not specified
if (null == hrefVal || 0 == hrefVal.length()) {
hrefVal = "";
}
// Write Anchor attributes
Param paramList[] = getParamList(component);
StringBuffer sb = new StringBuffer();
sb.append(hrefVal);
boolean paramWritten = hrefVal.indexOf('?') > 0;
for (int i = 0, len = paramList.length; i < len; i++) {
String pn = paramList[i].name;
if (pn != null && pn.length() != 0) {
String pv = paramList[i].value;
sb.append(paramWritten ? '&' : '?');
sb.append(URLEncoder.encode(pn, "UTF-8"));
sb.append('=');
if (pv != null && pv.length() != 0) {
sb.append(URLEncoder.encode(pv, "UTF-8"));
}
paramWritten = true;
}
}
sb.append(getFragment(component));
writer.writeURIAttribute("href", context.getExternalContext().encodeResourceURL(sb.toString()), "href");
RenderKitUtils.renderPassThruAttributes(context, writer, component, ATTRIBUTES);
RenderKitUtils.renderXHTMLStyleBooleanAttributes(writer, component);
String target = (String) component.getAttributes().get("target");
if (target != null && target.trim().length() != 0) {
writer.writeAttribute("target", target, "target");
}
writeCommonLinkAttributes(writer, component);
writer.flush();
}
}