com.liferay.wiki.engine.markdown.pegdown.ast.LiferayPegDownProcessor.java Source code

Introduction

Here is the source code for com.liferay.wiki.engine.markdown.pegdown.ast.LiferayPegDownProcessor.java

Source

/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library 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 Lesser General Public License for more
 * details.
 */

package com.liferay.wiki.engine.markdown.pegdown.ast;

import com.liferay.portal.kernel.log.Log;
import com.liferay.portal.kernel.log.LogFactoryUtil;
import com.liferay.portal.kernel.util.StringBundler;
import com.liferay.portal.kernel.util.StringPool;
import com.liferay.portal.kernel.util.StringUtil;

import org.pegdown.LinkRenderer;
import org.pegdown.Parser;
import org.pegdown.PegDownProcessor;
import org.pegdown.ast.RootNode;

/**
 * Converts Markdown to HTML using a {@link LiferayToHtmlSerializer}.
 *
 * @author James Hinkey
 */
public class LiferayPegDownProcessor extends PegDownProcessor {

    public LiferayPegDownProcessor(Parser parser) {
        super(parser);
    }

    @Override
    public String markdownToHtml(char[] markdownSource, LinkRenderer linkRenderer) {

        RootNode rootNode = parseMarkdown(markdownSource);

        LiferayToHtmlSerializer liferayToHtmlSerializer = new LiferayToHtmlSerializer(linkRenderer);

        String html = liferayToHtmlSerializer.toHtml(rootNode);

        return stripIds(html);
    }

    protected String stripIds(String content) {
        int index = content.indexOf("[](id=");

        if (index == -1) {
            return content;
        }

        StringBundler sb = new StringBundler();

        do {
            int x = content.indexOf(StringPool.EQUAL, index);

            int y = content.indexOf(StringPool.CLOSE_PARENTHESIS, x);

            if (y != -1) {
                int z = content.indexOf("</h", y);

                if (z != (y + 1)) {
                    sb.append(content.substring(0, y + 1));
                } else {
                    sb.append(StringUtil.trimTrailing(content.substring(0, index)));
                }

                content = content.substring(y + 1);
            } else {
                if (_log.isWarnEnabled()) {
                    String msg = content.substring(index);

                    // Get the invalid id text from the content

                    int spaceIndex = content.indexOf(StringPool.SPACE);

                    if (spaceIndex != -1) {
                        msg = content.substring(index, spaceIndex);
                    }

                    _log.warn("Missing ')' for web content containing header id " + msg);
                }

                // Since no close parenthesis remains in the content, stop
                // stripping out IDs and simply include all of the remaining
                // content

                break;
            }
        } while ((index = content.indexOf("[](id=")) != -1);

        sb.append(content);

        return sb.toString();
    }

    private static final Log _log = LogFactoryUtil.getLog(LiferayPegDownProcessor.class);

}