Supporting multiple filetypes set for current file

Vim allows setting the filetype string to something like "cpp.c", which means
that the file is both cpp and c (nonsense, but allowed). We need to support such
filetype strings.

python/vimsupport.py

@@ -67,8 +67,9 @@ def EscapeForVim( text ):
   return text.replace( "'", "''" )
 
 
-def CurrentFiletype():
-  return vim.eval( "&filetype" )
+def CurrentFiletypes():
+  ft_string = vim.eval( "&filetype" )
+  return ft_string.split( '.' )
 
 
 def GetVariableValue( variable ):

python/ycm.py

@@ -51,7 +51,17 @@ class YouCompleteMe( object ):
 
 
   def GetFiletypeCompleterForCurrentFile( self ):
-    filetype = vimsupport.CurrentFiletype()
+    filetypes = vimsupport.CurrentFiletypes()
+
+    for filetype in filetypes:
+      completer = self.GetFiletypeCompleterForFiletype( filetype )
+      if completer:
+        return completer
+
+    return None
+
+
+  def GetFiletypeCompleterForFiletype( self, filetype ):
     try:
       return self.filetype_completers[ filetype ]
     except KeyError:
@@ -92,8 +102,11 @@ class YouCompleteMe( object ):
 
 
   def FiletypeCompletionEnabledForCurrentFile( self ):
-    return ( vimsupport.CurrentFiletype() not in
-                FILETYPE_SPECIFIC_COMPLETION_TO_DISABLE and
+    filetypes = vimsupport.CurrentFiletypes()
+    filetype_disabled = all([ x in FILETYPE_SPECIFIC_COMPLETION_TO_DISABLE
+                             for x in filetypes ])
+
+    return ( not filetype_disabled and
              self.FiletypeCompletionAvailableForFile() )