Bug 829709: Do not load CSS files from all skins by default

Bugzilla/Template.pm

@@ -419,13 +419,10 @@ sub mtime_filter {
 #
 #  1. YUI CSS
 #  2. Standard Bugzilla stylesheet set (persistent)
-#  3. Standard Bugzilla stylesheet set (selectable)
-#  4. All third-party "skin" stylesheet sets (selectable)
-#  5. Page-specific styles
-#  6. Custom Bugzilla stylesheet set (persistent)
-#
-# "Selectable" skin file sets may be either preferred or alternate.
-# Exactly one is preferred, determined by the "skin" user preference.
+#  3. Third-party "skin" stylesheet set, per user prefs (persistent)
+#  4. Page-specific styles
+#  5. Custom Bugzilla stylesheet set (persistent)
+
 sub css_files {
     my ($style_urls, $yui, $yui_css) = @_;
     
@@ -442,18 +439,10 @@ sub css_files {
     
     my @css_sets = map { _css_link_set($_) } @requested_css;
     
-    my %by_type = (standard => [], alternate => {}, skin => [], custom => []);
+    my %by_type = (standard => [], skin => [], custom => []);
     foreach my $set (@css_sets) {
         foreach my $key (keys %$set) {
-            if ($key eq 'alternate') {
-                foreach my $alternate_skin (keys %{ $set->{alternate} }) {
-                    my $files = $by_type{alternate}->{$alternate_skin} ||= [];
-                    push(@$files, $set->{alternate}->{$alternate_skin});
-                }
-            }
-            else {
-                push(@{ $by_type{$key} }, $set->{$key});
-            }
+            push(@{ $by_type{$key} }, $set->{$key});
         }
     }
     
@@ -470,27 +459,15 @@ sub _css_link_set {
     if ($file_name !~ m{(^|/)skins/standard/}) {
         return \%set;
     }
-    
-    my $skin_user_prefs = Bugzilla->user->settings->{skin};
+
+    my $skin = Bugzilla->user->settings->{skin}->{value};
     my $cgi_path = bz_locations()->{'cgi_path'};
-    # If the DB is not accessible, user settings are not available.
-    my $all_skins = $skin_user_prefs ? $skin_user_prefs->legal_values : [];
-    my %skin_urls;
-    foreach my $option (@$all_skins) {
-        next if $option eq 'standard';
-        my $skin_file_name = $file_name;
-        $skin_file_name =~ s{(^|/)skins/standard/}{skins/contrib/$option/};
-        if (my $mtime = _mtime("$cgi_path/$skin_file_name")) {
-            $skin_urls{$option} = mtime_filter($skin_file_name, $mtime);
-        }
-    }
-    $set{alternate} = \%skin_urls;
-    
-    my $skin = $skin_user_prefs->{'value'};
-    if ($skin ne 'standard' and defined $set{alternate}->{$skin}) {
-        $set{skin} = delete $set{alternate}->{$skin};
+    my $skin_file_name = $file_name;
+    $skin_file_name =~ s{(^|/)skins/standard/}{skins/contrib/$skin/};
+    if (my $mtime = _mtime("$cgi_path/$skin_file_name")) {
+        $set{skin} = mtime_filter($skin_file_name, $mtime);
     }
-    
+
     my $custom_file_name = $file_name;
     $custom_file_name =~ s{(^|/)skins/standard/}{skins/custom/};
     if (my $custom_mtime = _mtime("$cgi_path/$custom_file_name")) {

template/en/default/global/header.html.tmpl

@@ -22,10 +22,6 @@
   # atomlink: Atom link URL, May contain HTML
   #%]
 
-[% IF message %]
-  [% PROCESS global/messages.html.tmpl %]
-[% END %]
-
 [% DEFAULT
   subheader = ""
   header_addl_info = ""
@@ -95,12 +91,8 @@
     [% SET yui = yui_resolve_deps(yui, yui_deps) %]
     [% SET css_sets = css_files(style_urls, yui, yui_css) %]
 
-    [%# CSS cascade, part 1: Standard Bugzilla stylesheet set (persistent).
-      # Always present.
-      #%]
-    [%# This allows people to switch back to the "Classic" skin if they
-      # are in another skin. 
-      #%]
+    [%# CSS cascade, parts 1 & 2: YUI & Standard Bugzilla stylesheet set (persistent).
+      # Always present. %]
     <link href="[% 'skins/standard/global.css' FILTER mtime FILTER html %]"
           rel="alternate stylesheet" 
           title="[% setting_descs.standard FILTER html %]">
@@ -108,22 +100,12 @@
       [% PROCESS format_css_link css_set_name = 'standard' %]
     [% END %]
 
-    [%# CSS cascade, part 2 & 3: Third-party stylesheet set (selected and
-      # selectable). All third-party skins are present as alternate
-      # stylesheets, even if they are not currently in use.
-      #%]
+    [%# CSS cascade, part 3: Third-party stylesheet set, per user prefs. %]
     [% FOREACH style_url = css_sets.skin %]
       [% PROCESS format_css_link css_set_name = user.settings.skin.value %]
     [% END %]
 
-    [% FOREACH alternate_skin = css_sets.alternate.keys %]
-      [% FOREACH style_url = css_sets.alternate.$alternate_skin %]
-        [% PROCESS format_css_link css_set_name = alternate_skin %]
-      [% END %]
-    [% END %]
-
-    [%# CSS cascade, part 4: page-specific styles.
-      #%]
+    [%# CSS cascade, part 4: page-specific styles. %]
     [% IF style %]
       <style type="text/css">
         [% style %]
@@ -296,7 +278,8 @@
 [% END %]
 
 [% IF message %]
-<div id="message">[% message %]</div>
+  [% PROCESS global/messages.html.tmpl %]
+  <div id="message">[% message %]</div>
 [% END %]
 
 [% BLOCK format_css_link %]
@@ -308,26 +291,15 @@
         #%]
   [% END %]
 
-  [% IF css_set_name == 'standard'
-       OR css_set_name == user.settings.skin.value
-  %]
-    [% SET css_rel = 'stylesheet' %]
-    [% SET css_set_display_name = setting_descs.${user.settings.skin.value}
-                                  || user.settings.skin.value %]
-  [% ELSE %]
-    [% SET css_rel = 'alternate stylesheet' %]
-    [% SET css_set_display_name = setting_descs.$css_set_name || css_set_name %]
-  [% END %]
-
   [% IF css_set_name == 'standard' %]
     [% SET css_title_link = '' %]
   [% ELSE %]
     [% css_title_link = BLOCK ~%]
-      title="[% css_set_display_name FILTER html %]"
+      title="[% setting_descs.${user.settings.skin.value} || user.settings.skin.value FILTER html %]"
     [% END %]
   [% END %]
 
-  <link href="[% style_url FILTER html %]" rel="[% css_rel FILTER none %]"
+  <link href="[% style_url FILTER html %]" rel="stylesheet"
         type="text/css" [% css_title_link FILTER none %]>
 
   [% '<![endif]-->' IF style_url.match('/IE-fixes\.css') %]