# HG changeset patch
# User osimons
# Date 1260452276 0
# Node ID 278c0ddb5c5811f818c3e8cc2fe8bd194a03f1c3
# Parent  8ca05f45ed2e75f02ae09a13e478fbc0342f1be8
Trac 0.12 compat following `prevnext_nav()` changes, fixing #450.

Thanks to Olaf Meeuwissen for ticket and patch.

diff --git a/bitten/web_ui.py b/bitten/web_ui.py
--- a/bitten/web_ui.py
+++ b/bitten/web_ui.py
@@ -22,7 +22,7 @@
 from trac.resource import Resource
 from trac.timeline import ITimelineEventProvider
 from trac.util import escape, pretty_timedelta, format_datetime, shorten_line, \
-                      Markup
+                      Markup, arity
 from trac.util.datefmt import to_timestamp, to_datetime, utc
 from trac.util.html import html
 from trac.web import IRequestHandler, IRequestFilter, HTTPNotFound
@@ -444,7 +444,10 @@
         if more:
             next_href = req.href.build(config.name, page=page + 1)
             add_link(req, 'next', next_href, 'Next Page')
-        prevnext_nav(req, 'Page')
+        if arity(prevnext_nav) == 4: # Trac 0.12 compat, see #450
+            prevnext_nav(req, 'Previous Page', 'Next Page')
+        else:
+            prevnext_nav (req, 'Page')
         return data