Rewrite relative links to reflect the base url of the repo.

project/build.scala

@@ -44,7 +44,8 @@ object MyBuild extends Build {
         "org.eclipse.jetty" % "jetty-webapp" % "8.1.8.v20121106" % "container;provided",
         "org.eclipse.jetty.orbit" % "javax.servlet" % "3.0.0.v201112011016" % "container;provided;test" artifacts Artifact("javax.servlet", "jar", "jar"),
         "junit" % "junit" % "4.11" % "test",
-        "org.asciidoctor" % "asciidoctor-java-integration" % "0.1.4"
+        "org.asciidoctor" % "asciidoctor-java-integration" % "0.1.4",
+        "net.sourceforge.htmlcleaner" % "htmlcleaner" % "2.7"
       ),
       EclipseKeys.withSource := true,
       javacOptions in compile ++= Seq("-target", "6", "-source", "6"),

src/main/scala/view/Asciidoc.scala

@@ -1,17 +1,14 @@
 package view
 
-import util.StringUtil
-import util.ControlUtil._
-import util.Directory._
-import org.parboiled.common.StringUtils
-import org.pegdown._
-import org.pegdown.ast._
-import org.pegdown.LinkRenderer.Rendering
-import java.text.Normalizer
-import java.util.Locale
-import scala.collection.JavaConverters._
-import service.{ RequestCache, WikiService }
-import org.asciidoctor.{ Asciidoctor, Attributes, AttributesBuilder, OptionsBuilder, SafeMode }
+import org.asciidoctor.Asciidoctor
+import org.asciidoctor.AttributesBuilder
+import org.asciidoctor.OptionsBuilder
+import org.asciidoctor.SafeMode
+import org.htmlcleaner.HtmlCleaner
+import org.htmlcleaner.HtmlNode
+import org.htmlcleaner.SimpleHtmlSerializer
+import org.htmlcleaner.TagNode
+import org.htmlcleaner.TagNodeVisitor
 
 object Asciidoc {
 
@@ -20,14 +17,41 @@ object Asciidoc {
   /**
    * Converts Markdown of Wiki pages to HTML.
    */
-  def toHtml(asciidoc: String, repository: service.RepositoryService.RepositoryInfo,
+  def toHtml(asciidoc: String, branch: String, repository: service.RepositoryService.RepositoryInfo,
              enableWikiLink: Boolean, enableRefsLink: Boolean)(implicit context: app.Context): String = {
+
     val options = OptionsBuilder.options()
     options.safe(SafeMode.SECURE)
     val attributes = AttributesBuilder.attributes()
     attributes.showTitle(true)
     options.attributes(attributes.get())
-    asciidoctor.render(asciidoc, options)
+    val rendered = asciidoctor.render(asciidoc, options)
+
+    // this is always relative to the base dir of the repo, as we currently only render README files.
+    val relativeUrlPrefix = s"${helpers.url(repository)}/blob/${branch}/"
+    prefixRelativeUrls(rendered, relativeUrlPrefix)
   }
+
+  def prefixRelativeUrls(html: String, urlPrefix: String): String = {
+    val cleaner = new HtmlCleaner()
+    val node = cleaner.clean(html)
+    node.traverse(new TagNodeVisitor() {
+      override def visit(tagNode: TagNode, htmlNode: HtmlNode): Boolean = {
+        htmlNode match {
+          case tag: TagNode if tag.getName == "a" =>
+            Option(tag.getAttributeByName("href")) foreach { href =>
+              if (!href.startsWith("/") && !href.startsWith("http://") && !href.startsWith("https://")) {
+                tag.addAttribute("href", s"${urlPrefix}${href}")
+              }
+            }
+          case _ =>
+        }
+        // continue traversal
+        true
+      }
+    })
+    new SimpleHtmlSerializer(cleaner.getProperties()).getAsString(node)
+  }
+
 }
 

src/main/scala/view/helpers.scala

@@ -27,12 +27,12 @@ object helpers extends AvatarImageProvider with LinkConverter with RequestCache
   def plural(count: Int, singular: String, plural: String = ""): String =
     if(count == 1) singular else if(plural.isEmpty) singular + "s" else plural
 
-  private[this] val renderersBySuffix: Seq[(String, (String, service.RepositoryService.RepositoryInfo, Boolean, Boolean, app.Context) => Html)] = 
+  private[this] val renderersBySuffix: Seq[(String, (String, String, service.RepositoryService.RepositoryInfo, Boolean, Boolean, app.Context) => Html)] =
     Seq(
-      ".md" -> ((fileContent, repository, enableWikiLink, enableRefsLink, context) => markdown(fileContent, repository, enableWikiLink, enableRefsLink)(context)),
-      ".markdown" -> ((fileContent, repository, enableWikiLink, enableRefsLink, context) => markdown(fileContent, repository, enableWikiLink, enableRefsLink)(context)),
-      ".adoc" -> ((fileContent, repository, enableWikiLink, enableRefsLink, context) => asciidoc(fileContent, repository, enableWikiLink, enableRefsLink)(context)),
-      ".asciidoc" -> ((fileContent, repository, enableWikiLink, enableRefsLink, context) => asciidoc(fileContent, repository, enableWikiLink, enableRefsLink)(context))
+      ".md" -> ((fileContent, branch, repository, enableWikiLink, enableRefsLink, context) => markdown(fileContent, repository, enableWikiLink, enableRefsLink)(context)),
+      ".markdown" -> ((fileContent, branch, repository, enableWikiLink, enableRefsLink, context) => markdown(fileContent, repository, enableWikiLink, enableRefsLink)(context)),
+      ".adoc" -> ((fileContent, branch, repository, enableWikiLink, enableRefsLink, context) => asciidoc(fileContent,  branch, repository, enableWikiLink, enableRefsLink)(context)),
+      ".asciidoc" -> ((fileContent, branch, repository, enableWikiLink, enableRefsLink, context) => asciidoc(fileContent,  branch, repository, enableWikiLink, enableRefsLink)(context))
     )
 
   def renderableSuffixes: Seq[String] = renderersBySuffix.map(_._1)
@@ -44,13 +44,13 @@ object helpers extends AvatarImageProvider with LinkConverter with RequestCache
                enableWikiLink: Boolean, enableRefsLink: Boolean)(implicit context: app.Context): Html =
     Html(Markdown.toHtml(value, repository, enableWikiLink, enableRefsLink))
 
-  def renderMarkup(fileName: String, fileContent: String,
+  def renderMarkup(fileName: String, fileContent: String, branch: String,
                    repository: service.RepositoryService.RepositoryInfo,
                    enableWikiLink: Boolean, enableRefsLink: Boolean)(implicit context: app.Context): Html = {
 
     val fileNameLower = fileName.toLowerCase
     renderersBySuffix.find { case (suffix, _) => fileNameLower.endsWith(suffix) } match {
-      case Some((_, handler)) => handler(fileContent, repository, enableWikiLink, enableRefsLink, context)
+      case Some((_, handler)) => handler(fileContent, branch, repository, enableWikiLink, enableRefsLink, context)
       case None => Html(
         s"<tt>${
           fileContent.split("(\\r\\n)|\\n").map(xml.Utility.escape(_)).mkString("<br/>")
@@ -59,9 +59,9 @@ object helpers extends AvatarImageProvider with LinkConverter with RequestCache
     }
   }
 
-  def asciidoc(value: String, repository: service.RepositoryService.RepositoryInfo,
+  def asciidoc(value: String, branch: String, repository: service.RepositoryService.RepositoryInfo,
                enableWikiLink: Boolean, enableRefsLink: Boolean)(implicit context: app.Context): Html =
-    Html(Asciidoc.toHtml(value, repository, enableWikiLink, enableRefsLink))
+    Html(Asciidoc.toHtml(value, branch, repository, enableWikiLink, enableRefsLink))
 
   /**
    * Returns &lt;img&gt; which displays the avatar icon for the given user name.

src/main/twirl/repo/files.scala.html

@@ -80,7 +80,7 @@
   @readme.map { case(file, content) =>
   <div id="readme" class="box">
     <div class="box-header">@file.name</div>
-    <div class="box-content markdown-body">@renderMarkup(file.name, content, repository, false, false)</div>
+    <div class="box-content markdown-body">@renderMarkup(file.name, content, branch, repository, false, false)</div>
   </div>
   }
 }