# HG changeset patch
# User cmlenz
# Date 1149453479 0
# Node ID 87238328a71d18a339cceaa6cb9a09c8ff80432c
# Parent  d69d935e42994b88dfea727f7b8caad79c073f07
Make the XInclude filter track namespace context, to enable it to omit `END_NS` events for the XInclude namespace.

diff --git a/markup/filters.py b/markup/filters.py
--- a/markup/filters.py
+++ b/markup/filters.py
@@ -95,15 +95,17 @@
         """
         self.loader = loader
 
-    def __call__(self, stream, ctxt=None):
+    def __call__(self, stream, ctxt=None, ns_prefixes=None):
         """Filter the stream, processing any XInclude directives it may
         contain.
         
         @param ctxt: the template context
         @param stream: the markup event stream to filter
         """
-        from markup.template import TemplateError, TemplateNotFound
+        from markup.template import Template, TemplateError, TemplateNotFound
 
+        if ns_prefixes is None:
+            ns_prefixes = []
         in_fallback = False
         include_href, fallback_stream = None, None
         indent = 0
@@ -156,6 +158,11 @@
                 fallback_stream.append((kind, data, pos))
 
             elif kind is Stream.START_NS and data[1] == self._NAMESPACE:
+                ns_prefixes.append(data[0])
+                continue
+
+            elif kind is Stream.END_NS and data in ns_prefixes:
+                ns_prefixes.pop()
                 continue
 
             else:
@@ -165,7 +172,7 @@
             # process
             return
 
-        for event in self(stream, ctxt):
+        for event in self(stream, ctxt, ns_prefixes=ns_prefixes):
             yield event