diff --git a/src/main/scala/app/RepositoryViewerController.scala b/src/main/scala/app/RepositoryViewerController.scala
index 375fd84..08bc547 100644
--- a/src/main/scala/app/RepositoryViewerController.scala
+++ b/src/main/scala/app/RepositoryViewerController.scala
@@ -12,7 +12,8 @@
 import org.apache.commons.io.FileUtils
 import org.eclipse.jgit.treewalk._
 import java.util.zip.{ZipEntry, ZipOutputStream}
-import scala.Some
+import jp.sf.amateras.scalatra.forms._
+import org.eclipse.jgit.dircache.DirCache
 
 class RepositoryViewerController extends RepositoryViewerControllerBase 
   with RepositoryService with AccountService with ActivityService with ReferrerAuthenticator with CollaboratorsAuthenticator
@@ -23,6 +24,13 @@
 trait RepositoryViewerControllerBase extends ControllerBase { 
   self: RepositoryService with AccountService with ActivityService with ReferrerAuthenticator with CollaboratorsAuthenticator =>
 
+  case class EditorForm(content: String, message: Option[String])
+
+  val editorForm = mapping(
+    "content" -> trim(label("Content", text())),
+    "message" -> trim(label("Messgae", optional(text())))
+  )(EditorForm.apply)
+
   /**
    * Returns converted HTML from Markdown for preview.
    */
@@ -74,9 +82,8 @@
   /**
    * Displays the file content of the specified branch or commit.
    */
-  get("/:owner/:repository/edit/*")(referrersOnly { repository =>
+  get("/:owner/:repository/edit/*")(collaboratorsOnly { repository =>
     val (id, path) = splitPath(repository, multiParams("splat").head)
-//    val raw = params.get("raw").getOrElse("false").toBoolean
 
     using(Git.open(getRepositoryDir(repository.owner, repository.name))){ git =>
       val revCommit = JGitUtil.getRevCommitFromId(git, git.getRepository.resolve(id))
@@ -116,6 +123,24 @@
     }
   })
 
+  post("/:owner/:repository/edit/*", editorForm)(collaboratorsOnly { (form, repository) =>
+//    val (id, path) = splitPath(repository, multiParams("splat").head)
+//    val loginAccount = context.loginAccount.get
+//
+//    using(Git.open(getRepositoryDir(repository.owner, repository.name))){ git =>
+//      val builder  = DirCache.newInCore.builder()
+//      val inserter = git.getRepository.newObjectInserter()
+//      val headId   = git.getRepository.resolve(Constants.HEAD + "^{commit}")
+//
+//      builder.add(JGitUtil.createDirCacheEntry(path, FileMode.REGULAR_FILE,
+//        inserter.insert(Constants.OBJ_BLOB, form.content.getBytes("UTF-8")))) // TODO charset auto detection
+//      builder.finish()
+//
+//      JGitUtil.createNewCommit(git, inserter, headId, builder.getDirCache.writeTree(inserter),
+//        loginAccount.fullName, loginAccount.mailAddress, form.message.getOrElse(s"Update ${path.split("/").last}"))
+//    }
+  })
+
   /**
    * Displays the file content of the specified branch or commit.
    */
@@ -163,7 +188,8 @@
             JGitUtil.ContentInfo(viewer, None)
           }
 
-          repo.html.blob(id, repository, path.split("/").toList, content, new JGitUtil.CommitInfo(revCommit))
+          repo.html.blob(id, repository, path.split("/").toList, content, new JGitUtil.CommitInfo(revCommit),
+            hasWritePermission(repository.owner, repository.name, context.loginAccount))
         }
       } getOrElse NotFound
     }
diff --git a/src/main/twirl/repo/blob.scala.html b/src/main/twirl/repo/blob.scala.html
index 42ab0cc..f7849fa 100644
--- a/src/main/twirl/repo/blob.scala.html
+++ b/src/main/twirl/repo/blob.scala.html
@@ -2,7 +2,8 @@
   repository: service.RepositoryService.RepositoryInfo,
   pathList: List[String],
   content: util.JGitUtil.ContentInfo,
-  latestCommit: util.JGitUtil.CommitInfo)(implicit context: app.Context)
+  latestCommit: util.JGitUtil.CommitInfo,
+  hasWritePermission: Boolean)(implicit context: app.Context)
 @import context._
 @import view.helpers._
 @html.main(s"${repository.owner}/${repository.name}", Some(repository)) {
@@ -28,8 +29,15 @@
           <span class="muted">@datetime(latestCommit.time)</span>
           <a href="@url(repository)/commit/@latestCommit.id" class="commit-message">@link(latestCommit.summary, repository)</a>
         </div>
+        @if(hasWritePermission){
+          <div class="btn-group pull-right">
+            <a class="btn btn-mini btn-danger" href="@url(repository)/delete/@encodeRefName(branch)/@pathList.mkString("/")">Delete</a>
+          </div>
+        }
         <div class="btn-group pull-right">
-          <a class="btn btn-mini" href="@url(repository)/edit/@encodeRefName(branch)/@pathList.mkString("/")">Edit</a>
+          @if(hasWritePermission){
+            <a class="btn btn-mini" href="@url(repository)/edit/@encodeRefName(branch)/@pathList.mkString("/")">Edit</a>
+          }
           <a class="btn btn-mini" href="?raw=true">Raw</a>
           <a class="btn btn-mini" href="@url(repository)/commits/@encodeRefName(branch)/@pathList.mkString("/")">History</a>
         </div>  
diff --git a/src/main/twirl/repo/editor.scala.html b/src/main/twirl/repo/editor.scala.html
index 7061176..37367b0 100644
--- a/src/main/twirl/repo/editor.scala.html
+++ b/src/main/twirl/repo/editor.scala.html
@@ -59,7 +59,8 @@
         </div>
         <div style="text-align: right;">
           <a href="@url(repository)/blob/@encodeRefName(branch)/@pathList.mkString("/")" class="btn btn-danger">Cancel</a>
-          <input type="submit" class="btn btn-success" value="Commit changes"/>
+          <input type="submit" id="commit" class="btn btn-success" value="Commit changes"/>
+          <input type="hidden" id="content" name="content" value=""/>
         </div>
       </div>
     </div>
@@ -70,4 +71,8 @@
   var editor = ace.edit("editor");
   editor.setTheme("ace/theme/monokai");
   editor.getSession().setMode("ace/mode/@editorType(pathList.last)");
+
+  $('#commit').click(function(){
+    $('#content').val(editor.getValue());
+  });
 </script>