/*
 * Copyright (c) 2010, 2016, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package jdk.javadoc.internal.doclets.formats.html.markup;

import java.io.IOException;
import java.io.Writer;
import java.util.*;

import jdk.javadoc.internal.doclets.toolkit.Content;

/**
 * Class for generating an HTML document for javadoc output.
 *
 *  <p><b>This is NOT part of any supported API.
 *  If you write code that depends on this, you do so at your own risk.
 *  This code and its internal interfaces are subject to change or
 *  deletion without notice.</b>
 *
 * @author Bhavesh Patel
 */
public class HtmlDocument extends Content {

    private List<Content> docContent = Collections.emptyList();

    /**
     * Constructor to construct an HTML document.
     *
     * @param docType document type for the HTML document
     * @param docComment comment for the document
     * @param htmlTree HTML tree of the document
     */
    public HtmlDocument(Content docType, Content docComment, Content htmlTree) {
        docContent = new ArrayList<>();
        addContent(nullCheck(docType));
        addContent(nullCheck(docComment));
        addContent(nullCheck(htmlTree));
    }

    /**
     * Constructor to construct an HTML document.
     *
     * @param docType document type for the HTML document
     * @param htmlTree HTML tree of the document
     */
    public HtmlDocument(Content docType, Content htmlTree) {
        docContent = new ArrayList<>();
        addContent(nullCheck(docType));
        addContent(nullCheck(htmlTree));
    }

    /**
     * Adds content for the HTML document.
     *
     * @param htmlContent html content to be added
     */
    public final void addContent(Content htmlContent) {
        if (htmlContent.isValid())
            docContent.add(htmlContent);
    }

    /**
     * This method is not supported by the class.
     *
     * @param stringContent string content that needs to be added
     * @throws UnsupportedOperationException always
     */
    @Override
    public void addContent(CharSequence stringContent) {
        throw new UnsupportedOperationException();
    }

    /**
     * {@inheritDoc}
     */
    public boolean isEmpty() {
        return (docContent.isEmpty());
    }

    /**
     * {@inheritDoc}
     */
    public boolean write(Writer out,  boolean atNewline) throws IOException {
        for (Content c : docContent)
            atNewline = c.write(out, atNewline);
        return atNewline;
    }
}