#prev link

        try:

            prev_rev = c.rhodecode_repo.get_changeset(cur_rev).prev(c.branch)

            c.url_prev = url('files_home', repo_name=c.repo_name,

                         revision=prev_rev.raw_id, f_path=f_path)

            if c.branch:

                c.url_prev += '?branch=%s' % c.branch

        except (ChangesetDoesNotExistError, VCSError):

            c.url_prev = '#'

        #next link

        try:

            next_rev = c.rhodecode_repo.get_changeset(cur_rev).next(c.branch)

            c.url_next = url('files_home', repo_name=c.repo_name,

                     revision=next_rev.raw_id, f_path=f_path)

            if c.branch:

                c.url_next += '?branch=%s' % c.branch

        except (ChangesetDoesNotExistError, VCSError):

            c.url_next = '#'

        #files or dirs

        try:

            c.files_list = c.changeset.get_node(f_path)

        except RepositoryError, e:

            h.flash(str(e), category='warning')

            redirect(h.url('files_home', repo_name=repo_name,

                           revision=revision))

        return render('files/files.html')

    def rawfile(self, repo_name, revision, f_path):

        cs = self.__get_cs_or_redirect(revision, repo_name)

        file_node = self.__get_filenode_or_redirect(repo_name, cs, f_path)

        response.content_disposition = 'attachment; filename=%s' % \

            f_path.split('/')[-1].encode('utf8', 'replace')

        response.content_type = file_node.mimetype

        return file_node.content

    def raw(self, repo_name, revision, f_path):

        cs = self.__get_cs_or_redirect(revision, repo_name)

        file_node = self.__get_filenode_or_redirect(repo_name, cs, f_path)

        response.content_type = 'text/plain'

        return file_node.content

    def annotate(self, repo_name, revision, f_path):

        c.f_path = f_path

        return render('files/files_annotate.html')

    def archivefile(self, repo_name, fname):

        fileformat = None

        revision = None

        ext = None

        for a_type, ext_data in ARCHIVE_SPECS.items():

            archive_spec = fname.split(ext_data[1])

            if len(archive_spec) == 2 and archive_spec[1] == '':

                fileformat = a_type or ext_data[1]

                revision = archive_spec[0]

                ext = ext_data[1]

        try:

            dbrepo = RepoModel().get_by_repo_name(repo_name)

            if dbrepo.enable_downloads is False:

                return _('downloads disabled')

            cs = c.rhodecode_repo.get_changeset(revision)

            content_type = ARCHIVE_SPECS[fileformat][0]

        except ChangesetDoesNotExistError:

            return _('Unknown revision %s') % revision

            if node1.is_binary or node2.is_binary:

                c.cur_diff = _('Binary file')

            elif node1.size > self.cut_off_limit or node2.size > self.cut_off_limit:

                c.cur_diff = _('Diff is too big to display')

            else:

                diff = differ.DiffProcessor(differ.get_gitdiff(node1, node2),

                                        format='gitdiff')

                c.cur_diff = diff.as_html()

        else:

            #default option

            if node1.is_binary or node2.is_binary:

                c.cur_diff = _('Binary file')

            elif node1.size > self.cut_off_limit or node2.size > self.cut_off_limit:

                c.cur_diff = _('Diff is too big to display')

            else:

                diff = differ.DiffProcessor(differ.get_gitdiff(node1, node2),

                                        format='gitdiff')

                c.cur_diff = diff.as_html()

        if not c.cur_diff:

            c.no_changes = True

        return render('files/file_diff.html')

        hist_l = []

        changesets_group = ([], _("Changesets"))

        branches_group = ([], _("Branches"))

        tags_group = ([], _("Tags"))

        for chs in changesets:

            n_desc = 'r%s:%s' % (chs.revision, chs.short_id)

            changesets_group[0].append((chs.raw_id, n_desc,))

        hist_l.append(changesets_group)

        for name, chs in c.rhodecode_repo.branches.items():

            #chs = chs.split(':')[-1]

            branches_group[0].append((chs, name),)

        hist_l.append(branches_group)

        for name, chs in c.rhodecode_repo.tags.items():

            #chs = chs.split(':')[-1]

            tags_group[0].append((chs, name),)

        hist_l.append(tags_group)

        return hist_l