/*
|
* Copyright 2011 gitblit.com.
|
*
|
* Licensed 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 com.gitblit.utils;
|
|
import static org.pegdown.Extensions.ALL;
|
import static org.pegdown.Extensions.SMARTYPANTS;
|
|
import java.io.IOException;
|
import java.io.Reader;
|
import java.io.StringWriter;
|
import java.text.MessageFormat;
|
|
import org.apache.commons.io.IOUtils;
|
import org.pegdown.LinkRenderer;
|
import org.pegdown.ParsingTimeoutException;
|
import org.pegdown.PegDownProcessor;
|
import org.pegdown.ast.RootNode;
|
|
import com.gitblit.IStoredSettings;
|
import com.gitblit.Keys;
|
import com.gitblit.wicket.MarkupProcessor.WorkaroundHtmlSerializer;
|
|
/**
|
* Utility methods for transforming raw markdown text to html.
|
*
|
* @author James Moger
|
*
|
*/
|
public class MarkdownUtils {
|
|
/**
|
* Returns the html version of the plain source text.
|
*
|
* @param text
|
* @return html version of plain text
|
* @throws java.text.ParseException
|
*/
|
public static String transformPlainText(String text) {
|
// url auto-linking
|
text = text.replaceAll("((http|https)://[0-9A-Za-z-_=\\?\\.\\$#&/]*)", "<a href=\"$1\">$1</a>");
|
String html = "<pre>" + text + "</pre>";
|
return html;
|
}
|
|
|
/**
|
* Returns the html version of the markdown source text.
|
*
|
* @param markdown
|
* @return html version of markdown text
|
* @throws java.text.ParseException
|
*/
|
public static String transformMarkdown(String markdown) {
|
return transformMarkdown(markdown, null);
|
}
|
|
/**
|
* Returns the html version of the markdown source text.
|
*
|
* @param markdown
|
* @return html version of markdown text
|
* @throws java.text.ParseException
|
*/
|
public static String transformMarkdown(String markdown, LinkRenderer linkRenderer) {
|
try {
|
PegDownProcessor pd = new PegDownProcessor(ALL & ~SMARTYPANTS);
|
RootNode astRoot = pd.parseMarkdown(markdown.toCharArray());
|
return new WorkaroundHtmlSerializer(linkRenderer == null ? new LinkRenderer() : linkRenderer).toHtml(astRoot);
|
} catch (ParsingTimeoutException e) {
|
return null;
|
}
|
}
|
|
/**
|
* Returns the html version of the markdown source reader. The reader is
|
* closed regardless of success or failure.
|
*
|
* @param markdownReader
|
* @return html version of the markdown text
|
* @throws java.text.ParseException
|
*/
|
public static String transformMarkdown(Reader markdownReader) throws IOException {
|
// Read raw markdown content and transform it to html
|
StringWriter writer = new StringWriter();
|
try {
|
IOUtils.copy(markdownReader, writer);
|
String markdown = writer.toString();
|
return transformMarkdown(markdown);
|
} finally {
|
try {
|
writer.close();
|
} catch (IOException e) {
|
// IGNORE
|
}
|
}
|
}
|
|
|
/**
|
* Transforms GFM (Github Flavored Markdown) to html.
|
* Gitblit does not support the complete GFM specification.
|
*
|
* @param input
|
* @param repositoryName
|
* @return html
|
*/
|
public static String transformGFM(IStoredSettings settings, String input, String repositoryName) {
|
String text = input;
|
|
// strikethrough
|
text = text.replaceAll("~~(.*)~~", "<s>$1</s>");
|
text = text.replaceAll("\\{(?:-){2}(.*)(?:-){2}}", "<s>$1</s>");
|
|
// underline
|
text = text.replaceAll("\\{(?:\\+){2}(.*)(?:\\+){2}}", "<u>$1</u>");
|
|
// strikethrough, replacement
|
text = text.replaceAll("\\{~~(.*)~>(.*)~~}", "<s>$1</s><u>$2</u>");
|
|
// highlight
|
text = text.replaceAll("\\{==(.*)==}", "<span class='highlight'>$1</span>");
|
|
String canonicalUrl = settings.getString(Keys.web.canonicalUrl, "https://localhost:8443");
|
|
// emphasize and link mentions
|
String mentionReplacement = String.format(" **[@$1](%1s/user/$1)**", canonicalUrl);
|
text = text.replaceAll("\\s@([A-Za-z0-9-_]+)", mentionReplacement);
|
|
// link ticket refs
|
String ticketReplacement = MessageFormat.format("$1[#$2]({0}/tickets?r={1}&h=$2)$3", canonicalUrl, repositoryName);
|
text = text.replaceAll("([\\s,]+)#(\\d+)([\\s,:\\.\\n])", ticketReplacement);
|
|
// link commit shas
|
int shaLen = settings.getInteger(Keys.web.shortCommitIdLength, 6);
|
String commitPattern = MessageFormat.format("\\s([A-Fa-f0-9]'{'{0}'}')([A-Fa-f0-9]'{'{1}'}')", shaLen, 40 - shaLen);
|
String commitReplacement = String.format(" [`$1`](%1$s/commit?r=%2$s&h=$1$2)", canonicalUrl, repositoryName);
|
text = text.replaceAll(commitPattern, commitReplacement);
|
|
String html = transformMarkdown(text);
|
return html;
|
}
|
}
|
