Allow sorting to be combined and/or reversed

[ikiwiki.git] / IkiWiki.pm

diff --git a/IkiWiki.pm b/IkiWiki.pm
index 1a4dc47dd8e0fbe2782c8db49f7a1d05bdba7b37..ce8fdd454dacf3af686a3f49953ab0381ba429dc 100644 (file)
--- a/IkiWiki.pm
+++ b/IkiWiki.pm
@@ -2005,6 +2005,64 @@ sub pagespec_match ($$;@) {
        return $sub->($page, @params);
 }
 
+sub get_sort_function {
+       my $method = $_[0];
+
+       if ($method =~ m/\s/) {
+               my @methods = map { get_sort_function($_) } split(' ', $method);
+
+               return sub {
+                       foreach my $method (@methods) {
+                               my $answer = $method->($_[0], $_[1]);
+                               return $answer if $answer;
+                       }
+
+                       return 0;
+               };
+       }
+
+       my $sense = 1;
+
+       if ($method =~ s/^-//) {
+               $sense = -1;
+       }
+
+       my $token = $method;
+       my $parameter = undef;
+
+       if ($method =~ m/^(\w+)\((.*)\)$/) {
+               $token = $1;
+               $parameter = $2;
+       }
+
+       if (exists $hooks{sort}{$token}{call}) {
+               my $callback = $hooks{sort}{$token}{call};
+               return sub { $sense * $callback->($_[0], $_[1], $parameter) };
+       }
+
+       if ($method eq 'title') {
+               return sub { $sense * (pagetitle(basename($_[0])) cmp pagetitle(basename($_[1]))) };
+       }
+
+       if ($method eq 'title_natural') {
+               eval q{use Sort::Naturally};
+               if ($@) {
+                       error(gettext("Sort::Naturally needed for title_natural sort"));
+               }
+               return sub { $sense * Sort::Naturally::ncmp(pagetitle(basename($_[0])), pagetitle(basename($_[1]))) };
+       }
+
+       if ($method eq 'mtime') {
+               return sub { $sense * ($pagemtime{$_[1]} <=> $pagemtime{$_[0]}) };
+       }
+
+       if ($method eq 'age') {
+               return sub { $sense * ($pagectime{$_[1]} <=> $pagectime{$_[0]}) };
+       }
+
+       error sprintf(gettext("unknown sort type %s"), $method);
+}
+
 sub pagespec_match_list ($$;@) {
        my $page=shift;
        my $pagespec=shift;
@@ -2034,31 +2092,9 @@ sub pagespec_match_list ($$;@) {
        }
 
        if (defined $params{sort}) {
-               my $f;
+               my $f = get_sort_function($params{sort});
 
-               if (exists $hooks{sort}{$params{sort}}{call}) {
-                       $f = sub { $hooks{sort}{$params{sort}}{call}($a, $b) };
-               }
-               elsif ($params{sort} eq 'title') {
-                       $f=sub { pagetitle(basename($a)) cmp pagetitle(basename($b)) };
-               }
-               elsif ($params{sort} eq 'title_natural') {
-                       eval q{use Sort::Naturally};
-                       if ($@) {
-                               error(gettext("Sort::Naturally needed for title_natural sort"));
-                       }
-                       $f=sub { Sort::Naturally::ncmp(pagetitle(basename($a)), pagetitle(basename($b))) };
-                }
-               elsif ($params{sort} eq 'mtime') {
-                       $f=sub { $pagemtime{$b} <=> $pagemtime{$a} };
-               }
-               elsif ($params{sort} eq 'age') {
-                       $f=sub { $pagectime{$b} <=> $pagectime{$a} };
-               }
-               else {
-                       error sprintf(gettext("unknown sort type %s"), $params{sort});
-               }
-               @candidates = sort { &$f } @candidates;
+               @candidates = sort { $f->($a, $b) } @candidates;
        }
 
        @candidates=reverse(@candidates) if $params{reverse};