[kupfer] kupfer_provider: Ignore selections bigger than 500

[Ulrik Sverdrup <usverdrup src gnome org>]

commit f2dbb1dcb1e17f7c790de6251bcfc68e84887c9d
Author: Ulrik Sverdrup <ulrik sverdrup gmail com>
Date:   Sun Aug 30 00:41:09 2009 +0200

    kupfer_provider: Ignore selections bigger than 500
    
    To simply rate-limit the traffic, when the selection is bigger than
    500, we don't send anything at all.
    
    This is just to put some kind of theshold on this plugin, so that it
    doesn't interfere with nautilus (it should not be noticed). Who knows
    what would happen if we try to send 20000 byte strings over D-Bus.

 extras/kupfer_provider.py |   19 ++++++++++++++-----
 1 files changed, 14 insertions(+), 5 deletions(-)
---
diff --git a/extras/kupfer_provider.py b/extras/kupfer_provider.py
index ad1088a..26a23a9 100644
--- a/extras/kupfer_provider.py
+++ b/extras/kupfer_provider.py
@@ -56,6 +56,7 @@ class KupferSelectionProvider(nautilus.MenuProvider):
 		selfname = type(self).__name__
 		print "Initializing", selfname
 		self.cur_selection = []
+		self.max_threshold = 500
 		try:
 			session_bus = dbus.Bus()
 		except dbus.DBusException, exc:
@@ -70,11 +71,19 @@ class KupferSelectionProvider(nautilus.MenuProvider):
 				self.service = Object(bus_name, object_path=object_path)
 	
 	def get_file_items(self, window, files):
-		"""We show nothing, but we get info on files that are selected"""
-		# iif:
-		# - There is at least on file selected
-		# - All selected files are locals
-		uris = [f.get_uri() for f in files]
+		"""We show nothing, but we get info on files that are selected
+
+		Ask GIO for the file path of each URI item, and pass on any that
+		have a defined path.
+		Then we try to decode the paths to strings to send if possible to
+		decode using the current encoding.
+
+		We use a threshold on the files so that we don't generate too much
+		traffic; with more than 500 files selected, we simply send nothing.
+		"""
+		if len(files) > self.max_threshold:
+			return
+		uris = (f.get_uri() for f in files)
 		paths = filter(None, (gio.File(u).get_path() for u in uris))
 		# try to decode filesystem strings
 		ustrs = []