Add syntax highlighting in Wiki.

src/main/scala/view/Markdown.scala

@@ -0,0 +1,75 @@
+package view
+
+import org.parboiled.common.StringUtils
+import org.pegdown._
+import org.pegdown.LinkRenderer.Rendering
+import org.pegdown.ast.{WikiLinkNode, VerbatimNode}
+import scala.collection.JavaConverters._
+
+object Markdown {
+
+//  /**
+//   * Converts the issue number and the commit id to the link.
+//   */
+//  private def markdownFilter(value: String, repository: service.RepositoryService.RepositoryInfo)(implicit context: app.Context): String = {
+//    value
+//      .replaceAll("#([0-9]+)", "[$0](%s/%s/%s/issue/$1)".format(context.path, repository.owner, repository.name))
+//      .replaceAll("[0-9a-f]{40}", "[$0](%s/%s/%s/commit/$0)".format(context.path, repository.owner, repository.name))
+//  }
+
+  /**
+   * Converts Markdown of Wiki pages to HTML.
+   */
+  def toHtml(value: String, repository: service.RepositoryService.RepositoryInfo,
+             wikiLink: Boolean)(implicit context: app.Context): String = {
+    new PegDownProcessor(Extensions.AUTOLINKS | Extensions.WIKILINKS | Extensions.FENCED_CODE_BLOCKS | Extensions.TABLES)
+      .markdownToHtml(value,
+        new GitBucketLinkRender(wikiLink, context, repository),
+        Map[String, VerbatimSerializer](VerbatimSerializer.DEFAULT -> new GitBucketVerbatimSerializer).asJava)
+  }
+}
+
+class GitBucketLinkRender(wikiLink: Boolean, context: app.Context,
+                          repository: service.RepositoryService.RepositoryInfo) extends LinkRenderer {
+
+  override def render(node: WikiLinkNode): Rendering = {
+    if(wikiLink){
+      super.render(node)
+    } else {
+      try {
+        val text = node.getText
+        val (label, page) = if(text.contains('|')){
+          val i = text.indexOf('|')
+          (text.substring(0, i), text.substring(i + 1))
+        } else {
+          (text, text)
+        }
+        val url = "%s/%s/%s/wiki/%s".format(context.path, repository.owner, repository.name,
+          java.net.URLEncoder.encode(page.replace(' ', '-'), "UTF-8"))
+        new Rendering(url, label)
+      } catch {
+        case e: java.io.UnsupportedEncodingException => throw new IllegalStateException();
+      }
+    }
+  }
+
+}
+
+class GitBucketVerbatimSerializer extends VerbatimSerializer {
+
+  def serialize(node: VerbatimNode, printer: Printer) {
+    printer.println.print("<pre")
+    if (!StringUtils.isEmpty(node.getType)) {
+      printer.print(" class=").print('"').print("prettyprint ").print(node.getType).print('"')
+    }
+    printer.print(">")
+    var text: String = node.getText
+    while (text.charAt(0) == '\n') {
+      printer.print("<br/>")
+      text = text.substring(1)
+    }
+    printer.printEncoded(text)
+    printer.print("</pre>")
+  }
+
+}