Fix image files presentation at blob view and diff view.

src/main/scala/util/FileTypeUtil.scala

@@ -1,13 +1,21 @@
 package util
 
 import org.apache.commons.io.FilenameUtils
+import java.net.URLConnection
 
 object FileTypeUtil {
   
-  def isImage(name: String): Boolean = FilenameUtils.getExtension(name).toLowerCase match {
+  def getMimeType(name: String): String = {
-    case "jpg"|"jpeg"|"bmp"|"gif"|"png" => true
+    val fileNameMap = URLConnection.getFileNameMap()
-    case _ => false
+    val mimeType = fileNameMap.getContentTypeFor(name)
+    if(mimeType == null){
+      "application/octeat-stream"
+    } else {
+      mimeType
     }
+  }
+  
+  def isImage(name: String): Boolean = getMimeType(name).startsWith("image/")
   
   def isLarge(size: Long): Boolean = (size > 1024 * 1000)
 

src/main/scala/util/JGitUtil.scala

@@ -402,9 +402,13 @@ object JGitUtil {
       
       import scala.collection.JavaConverters._
       git.diff.setNewTree(newTreeIter).setOldTree(oldTreeIter).call.asScala.map { diff =>
+        if(FileTypeUtil.isImage(diff.getOldPath) || FileTypeUtil.isImage(diff.getNewPath)){
+          DiffInfo(diff.getChangeType, diff.getOldPath, diff.getNewPath, None, None) 
+        } else {
           DiffInfo(diff.getChangeType, diff.getOldPath, diff.getNewPath,
             JGitUtil.getContent(git, diff.getOldId.toObjectId, false).map(new String(_, "UTF-8")), 
             JGitUtil.getContent(git, diff.getNewId.toObjectId, false).map(new String(_, "UTF-8")))
+        }
       }.toList
     } else {
       // initial commit

src/main/twirl/diff.scala.html

@@ -28,7 +28,8 @@
           <textarea id="newText-@i" style="display: none;">@diff.newContent.getOrElse("")</textarea>
           <textarea id="oldText-@i" style="display: none;">@diff.oldContent.getOrElse("")</textarea>
         } else {
-        Too big file not shown
+          Not supported
+          @*Too big file not shown*@
         }
       </td>
     </tr>