#2695: Recognize text files as such.

sugar/objects/mime.py

@@ -1,4 +1,5 @@
 # Copyright (C) 2006-2007, Red Hat, Inc.
+# Copyright (C) 2007, One Laptop Per Child
 #
 # This library is free software; you can redistribute it and/or
 # modify it under the terms of the GNU Lesser General Public
@@ -20,7 +21,13 @@ import logging
 from sugar import _sugarext
 
 def get_for_file(file_name):
-    return _sugarext.get_mime_type_for_file(file_name)
+    mime_type = _sugarext.get_mime_type_for_file(file_name)
+    if mime_type == 'application/octet-stream':
+        if _file_looks_like_text(file_name):
+            return 'text/plain'
+        else:
+            return 'application/octet-stream'
+    return mime_type
         
 def get_from_file_name(file_name):
     return _sugarext.get_mime_type_from_file_name(file_name)
@@ -80,3 +87,22 @@ def choose_most_significant(mime_types):
 
     logging.debug('Returning first: %r.' % mime_types[0])
     return mime_types[0]
+
+def _file_looks_like_text(file_name):
+    f = open(file_name, 'r')
+    try:
+        sample = f.read(256)
+    finally:
+        f.close()
+
+    if '\000' in sample:
+        return False
+
+    for encoding in ('ascii', 'latin_1', 'utf_8', 'utf_16'):
+        try:
+            string = unicode(sample, encoding)
+            return True
+        except Exception, e:
+            pass
+
+    return False