/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.zeppelin.markdown;
import org.pegdown.Extensions;
import org.pegdown.PegDownProcessor;
import org.pegdown.plugins.PegDownPlugins;
/**
* Markdown Parser using pegdown processor.
*/
public class PegdownParser implements MarkdownParser {
private PegDownProcessor processor;
public static final long PARSING_TIMEOUT_AS_MILLIS = 10000;
public static final int OPTIONS = Extensions.ALL_WITH_OPTIONALS - Extensions.ANCHORLINKS;
public PegdownParser() {
PegDownPlugins plugins = new PegDownPlugins.Builder()
.withPlugin(PegdownYumlPlugin.class)
.withPlugin(PegdownWebSequencelPlugin.class)
.build();
processor = new PegDownProcessor(OPTIONS, PARSING_TIMEOUT_AS_MILLIS, plugins);
}
@Override
public String render(String markdownText) {
String html = "";
String parsed = processor.markdownToHtml(markdownText);
if (null == parsed) {
throw new RuntimeException("Cannot parse markdown text to HTML using pegdown");
}
html = wrapWithMarkdownClassDiv(parsed);
return html;
}
/**
* wrap with markdown class div to styling DOM using css.
*/
public static String wrapWithMarkdownClassDiv(String html) {
return new StringBuilder()
.append("<div class=\"markdown-body\">\n")
.append(html)
.append("\n</div>")
.toString();
}
}