/*
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* Copyright 2011 gitblit.com.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.gitblit.utils;
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import static org.pegdown.Extensions.ALL;
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import java.io.IOException;
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import java.io.Reader;
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import java.io.StringWriter;
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import org.apache.commons.io.IOUtils;
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import org.pegdown.LinkRenderer;
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import org.pegdown.PegDownProcessor;
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/**
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* Utility methods for transforming raw markdown text to html.
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*
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* @author James Moger
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*
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*/
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public class MarkdownUtils {
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/**
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* Returns the html version of the plain source text.
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*
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* @param text
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* @return html version of plain text
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* @throws java.text.ParseException
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*/
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public static String transformPlainText(String text) {
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// url auto-linking
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text = text.replaceAll("((http|https)://[0-9A-Za-z-_=\\?\\.\\$#&/]*)", "<a href=\"$1\">$1</a>");
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String html = "<pre>" + text + "</pre>";
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return html;
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}
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/**
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* Returns the html version of the markdown source text.
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*
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* @param markdown
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* @return html version of markdown text
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* @throws java.text.ParseException
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*/
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public static String transformMarkdown(String markdown) {
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return transformMarkdown(markdown, null);
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}
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/**
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* Returns the html version of the markdown source text.
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*
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* @param markdown
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* @return html version of markdown text
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* @throws java.text.ParseException
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*/
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public static String transformMarkdown(String markdown, LinkRenderer linkRenderer) {
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PegDownProcessor pd = new PegDownProcessor(ALL);
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String html = pd.markdownToHtml(markdown, linkRenderer == null ? new LinkRenderer() : linkRenderer);
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return html;
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}
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/**
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* Returns the html version of the markdown source reader. The reader is
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* closed regardless of success or failure.
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*
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* @param markdownReader
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* @return html version of the markdown text
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* @throws java.text.ParseException
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*/
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public static String transformMarkdown(Reader markdownReader) throws IOException {
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// Read raw markdown content and transform it to html
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StringWriter writer = new StringWriter();
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try {
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IOUtils.copy(markdownReader, writer);
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String markdown = writer.toString();
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return transformMarkdown(markdown);
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} finally {
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try {
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writer.close();
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} catch (IOException e) {
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// IGNORE
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}
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}
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}
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}
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