Human readable file names when copying on usb...

Conflicts:

	NEWS

NEWS

@@ -1,3 +1,7 @@
+* #3649 Human readable file names on USB. (marco)
+
+Snapshot b8ce5083b7
+
 * #3601 Always remove invites from the frame. (cassidy)
 
 Snapshot b8ce5083b7

sugar/datastore/datastore.py

@@ -27,6 +27,7 @@ from sugar import activity
 from sugar.activity.bundle import Bundle
 from sugar.activity.activityhandle import ActivityHandle
 from sugar.bundle.contentbundle import ContentBundle
+from sugar.objects import mime
 
 class DSMetadata(gobject.GObject):
     __gsignals__ = {
@@ -259,6 +260,17 @@ def copy(jobject, mount_point):
     new_jobject = jobject.copy()
     new_jobject.metadata['mountpoint'] = mount_point
 
+    if jobject.metadata.has_key('title'):
+        filename = jobject.metadata['title']
+
+        if jobject.metadata.has_key('mime_type'):
+            mime_type = jobject.metadata['mime_type']
+            extension = mime.get_primary_extension(mime_type)
+            if extension:
+                filename += '.' + extension
+
+        new_jobject.metadata['suggested_filename'] = filename
+
     # this will cause the file be retrieved from the DS
     new_jobject.file_path = jobject.file_path