[fixes #825] Add MarkdownUtil

core/src/net/sf/openrocket/util/MarkdownUtil.java

@@ -0,0 +1,30 @@
+package net.sf.openrocket.util;
+
+import org.commonmark.node.Node;
+import org.commonmark.parser.Parser;
+import org.commonmark.renderer.html.HtmlRenderer;
+
+/**
+ * This class formats a Markdown text (e.g. from the GitHub API) to HTML
+ *
+ * @author Sibo Van Gool <sibo.vangool@hotmail.com>
+ */
+public class MarkdownUtil {
+    /**
+     * Convert input Markdown text to HTML.
+     * @param markdown text with Markdown styles.
+     * @return HTML rendering from the Markdown
+     */
+    public static String toHtml(String markdown) {
+        if (markdown == null) return "";
+
+        // Convert JSON string new line to markdown newline
+        markdown = markdown.replace("\\r\\n", "\n");
+
+        Parser parser = Parser.builder().build();
+        Node document = parser.parse(markdown);
+        HtmlRenderer renderer = HtmlRenderer.builder().build();
+
+        return renderer.render(document);
+    }
+}