Be smarter when choosing one mime type from the targets offered.

sugar/util.py

@@ -22,6 +22,8 @@ import random
 import binascii
 import string
 import os
+import logging
+
 from ConfigParser import ConfigParser
 from ConfigParser import NoOptionError
 
@@ -125,3 +127,26 @@ def set_proc_title(title):
         return True
     except:
         return False
+
+def choose_most_significant_mime_type(mime_types):
+    logging.debug('Choosing between %r.' % mime_types)
+    if not mime_types:
+        return ''
+
+    if 'text/uri-list' in mime_types:
+        return 'text/uri-list'
+
+    for mime_category in ['image/', 'text/', 'application/']:
+        for mime_type in mime_types:
+            if mime_type.startswith(mime_category) and \
+                    not mime_type.split('/')[1].startswith('_'):
+                mime_type = mime_type.split(';')[0]
+                logging.debug('Choosed %r!' % mime_type)
+                return mime_type
+
+    if 'STRING' in mime_types:
+        return 'text/plain'
+
+    logging.debug('Returning first: %r.' % mime_types[0])
+    return mime_types[0]
+