Generalize markdown preview.

src/main/scala/app/RepositoryViewerController.scala

@@ -18,7 +18,7 @@ class RepositoryViewerController extends RepositoryViewerControllerBase
  * The repository viewer.
  */
 trait RepositoryViewerControllerBase extends ControllerBase { 
-  self: RepositoryService with AccountService with ReadableRepositoryAuthenticator =>
+  self: RepositoryService with AccountService with ReadableRepositoryAuthenticator  =>
   
   // TODO separate to AccountController?
   /**
@@ -31,7 +31,18 @@ trait RepositoryViewerControllerBase extends ControllerBase {
       case None => NotFound()
     }
   }
-  
+
+  /**
+   * Returns converted HTML from Markdown for preview.
+   */
+  post("/:owner/:repository/_preview")(readableRepository {
+    val owner      = params("owner")
+    val repository = params("repository")
+    val content    = params("content")
+    contentType = "text/html"
+    view.helpers.markdown(content, getRepository(owner, repository, servletContext).get, true)
+  })
+
   /**
    * Displays the file list of the repository root and the default branch.
    */

src/main/scala/app/WikiController.scala

@@ -145,15 +145,7 @@ trait WikiControllerBase extends ControllerBase {
         JGitUtil.getCommitLog(git, "master")._1, getRepository(owner, repository, servletContext).get)
     }
   })
-  
-  post("/:owner/:repository/wiki/_preview")(writableRepository {
-    val owner      = params("owner")
-    val repository = params("repository")
-    val content    = params("content")
-    contentType = "text/html"
-    view.helpers.markdown(content, getRepository(owner, repository, servletContext).get, true)
-  })
-  
+
   /**
    * Constraint for the wiki page name.
    */