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EE4J Compatible Implementation for Jakarta Faces API

There is a newer version: 4.1.1

/*
 * 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
 */

package com.sun.faces.renderkit.html_basic;

import java.io.IOException;
import java.io.Writer;
import java.util.LinkedList;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import com.sun.faces.RIConstants;
import com.sun.faces.config.WebConfiguration;
import com.sun.faces.config.WebConfiguration.BooleanWebContextInitParameter;
import com.sun.faces.io.FastStringWriter;
import com.sun.faces.util.HtmlUtils;
import com.sun.faces.util.MessageUtils;

import jakarta.el.ValueExpression;
import jakarta.faces.FacesException;
import jakarta.faces.component.UIComponent;
import jakarta.faces.context.ExternalContext;
import jakarta.faces.context.FacesContext;
import jakarta.faces.context.ResponseWriter;
import jakarta.faces.render.Renderer;

/**
 * 
 * HtmlResponseWriter is an Html specific implementation of the ResponseWriter abstract
 * class. Kudos to Adam Winer (Oracle) for much of this code.
 */
public class HtmlResponseWriter extends ResponseWriter {

    // Content Type for this Writer.
    //
    private String contentType = "text/html";

    // Character encoding of that Writer - this may be null
    // if the encoding isn't known.
    //
    private String encoding = null;

    // Writer to use for output;
    //
    private Writer writer = null;

    // True when we need to close a start tag
    //
    private boolean closeStart;

    // Configuration flag regarding disableUnicodeEscaping
    //
    private WebConfiguration.DisableUnicodeEscaping disableUnicodeEscaping;

    // Flag to escape Unicode
    //
    private boolean escapeUnicode;

    // Flag to escape ISO-8859-1 codes
    //
    private boolean escapeIso;

    // True when we shouldn't be escaping output (basically,
    // inside of