/*
 * Copyright (c) 2010, 2020, 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
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package jdk.javadoc.internal.doclets.formats.html.markup;

import java.io.IOException;
import java.io.Writer;

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

Class for generating raw HTML content to be added to HTML pages of javadoc output.
 
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.
/**
 * Class for generating raw HTML content to be added to HTML pages of 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>
 */
public class RawHtml extends Content {

    private final String rawHtmlContent;

    
Constructor to construct a RawHtml object.
Params:
rawHtml – raw HTML text to be added/**
     * Constructor to construct a RawHtml object.
     *
     * @param rawHtml raw HTML text to be added
     */
    public RawHtml(CharSequence rawHtml) {
        rawHtmlContent = rawHtml.toString();
    }

    @Override
    public boolean isEmpty() {
        return rawHtmlContent.isEmpty();
    }

    @Override
    public String toString() {
        return rawHtmlContent;
    }

    private enum State { TEXT, ENTITY, TAG, STRING }

    @Override
    public int charCount() {
        return charCount(rawHtmlContent);
    }

    static int charCount(CharSequence htmlText) {
        State state = State.TEXT;
        int count = 0;
        for (int i = 0; i < htmlText.length(); i++) {
            char c = htmlText.charAt(i);
            switch (state) {
                case TEXT:
                    switch (c) {
                        case '<':
                            state = State.TAG;
                            break;
                        case '&':
                            state = State.ENTITY;
                            count++;
                            break;
                        case '\r':
                        case '\n':
                            // Windows uses "\r\n" as line separator while UNIX uses "\n".
                            // Ignore line separators to get consistent results across platforms.
                            break;
                        default:
                            count++;
                    }
                    break;

                case ENTITY:
                    if (!Character.isLetterOrDigit(c))
                        state = State.TEXT;
                    break;

                case TAG:
                    switch (c) {
                        case '"':
                            state = State.STRING;
                            break;
                        case '>':
                            state = State.TEXT;
                            break;
                    }
                    break;

                case STRING:
                    switch (c) {
                        case '"':
                            state = State.TAG;
                            break;
                    }
            }
        }
        return count;
    }

    @Override
    public boolean write(Writer out, boolean atNewline) throws IOException {
        out.write(rawHtmlContent);
        return rawHtmlContent.endsWith(DocletConstants.NL);
    }
}