diff -r 2e8342aeab49 -r 5c64ce6168da mercurial/hgweb/webutil.py
--- a/mercurial/hgweb/webutil.py	Mon Jul 30 22:33:45 2012 -0500
+++ b/mercurial/hgweb/webutil.py	Tue Jul 31 14:14:15 2012 +0200
@@ -6,7 +6,7 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
-import os, mimetypes, copy
+import os, copy
 from mercurial import match, patch, scmutil, error, ui, util
 from mercurial.i18n import _
 from mercurial.node import hex, nullid
@@ -227,17 +227,9 @@
     yield tmpl('diffblock', parity=parity.next(), blockno=blockno,
                lines=prettyprintlines(''.join(block), blockno))
 
-def compare(tmpl, ctx, path, context):
+def compare(tmpl, context, leftlines, rightlines):
     '''Generator function that provides side-by-side comparison data.'''
 
-    def filelines(f):
-        if util.binary(f.data()):
-            mt = mimetypes.guess_type(f.path())[0]
-            if not mt:
-                mt = 'application/octet-stream'
-            return [_('(binary file %s, hash: %s)') % (mt, hex(f.filenode()))]
-        return f.data().splitlines()
-
     def compline(type, leftlineno, leftline, rightlineno, rightline):
         lineid = leftlineno and ("l%s" % leftlineno) or ''
         lineid += rightlineno and ("r%s" % rightlineno) or ''
@@ -275,43 +267,12 @@
                                    rightlineno=i + 1,
                                    rightline=rightlines[i])
 
-    if path in ctx:
-        fctx = ctx[path]
-        rightrev = fctx.filerev()
-        rightnode = fctx.filenode()
-        rightlines = filelines(fctx)
-        parents = fctx.parents()
-        if not parents:
-            leftrev = -1
-            leftnode = nullid
-            leftlines = ()
-        else:
-            pfctx = parents[0]
-            leftrev = pfctx.filerev()
-            leftnode = pfctx.filenode()
-            leftlines = filelines(pfctx)
-    else:
-        rightrev = -1
-        rightnode = nullid
-        rightlines = ()
-        fctx = ctx.parents()[0][path]
-        leftrev = fctx.filerev()
-        leftnode = fctx.filenode()
-        leftlines = filelines(fctx)
-
     s = difflib.SequenceMatcher(None, leftlines, rightlines)
     if context < 0:
-        blocks = [tmpl('comparisonblock', lines=getblock(s.get_opcodes()))]
+        yield tmpl('comparisonblock', lines=getblock(s.get_opcodes()))
     else:
-        blocks = (tmpl('comparisonblock', lines=getblock(oc))
-                     for oc in s.get_grouped_opcodes(n=context))
-
-    yield tmpl('comparison',
-               leftrev=leftrev,
-               leftnode=hex(leftnode),
-               rightrev=rightrev,
-               rightnode=hex(rightnode),
-               blocks=blocks)
+        for oc in s.get_grouped_opcodes(n=context):
+            yield tmpl('comparisonblock', lines=getblock(oc))
 
 def diffstatgen(ctx):
     '''Generator function that provides the diffstat data.'''