[PATCH 4 of 6 V2-Series-A] revset: retrieve hidden from filteredrevs

[pierre-yves.david at logilab.fr]

# HG changeset patch
# User Pierre-Yves David <pierre-yves.david at logilab.fr>
# Date 1357235294 -3600
# Node ID 4463766c2fab37a23bd79533b387cb47a3c49934
# Parent  3fdab0013c838a19ef6c9891fc3f989e1ea37712
revset: retrieve hidden from filteredrevs

This prepare the dropping of the `repo.hiddenrevs` property

diff --git a/mercurial/revset.py b/mercurial/revset.py
--- a/mercurial/revset.py
+++ b/mercurial/revset.py
@@ -11,10 +11,11 @@ import node
 import bookmarks as bookmarksmod
 import match as matchmod
 from i18n import _
 import encoding
 import obsolete as obsmod
+import repoview
 
 def _revancestors(repo, revs, followfirst):
     """Like revlog.ancestors(), but supports followfirst."""
     cut = followfirst and 1 or None
     cl = repo.changelog
@@ -890,11 +891,12 @@ def hidden(repo, subset, x):
     """``hidden()``
     Hidden changesets.
     """
     # i18n: "hidden" is a keyword
     getargs(x, 0, 0, _("hidden takes no arguments"))
-    return [r for r in subset if r in repo.hiddenrevs]
+    hiddenrevs = repoview.filteredrevs(repo, 'hidden')
+    return [r for r in subset if r in hiddenrevs]
 
 def keyword(repo, subset, x):
     """``keyword(string)``
     Search commit message, user name, and names of changed files for
     string. The match is case-insensitive.