style: Replicate the list of stylesheets on the layout thread.

This is a patch that unifies a bit how Gecko and Stylo stylesheets work, in
order to be able to eventually move the stylesheets into the stylist, and be
able to incrementally update the invalidation map.

1 files changed, 4 insertions, 8 deletions

diff --git a/components/script/dom/stylesheetlist.rs b/components/script/dom/stylesheetlist.rs
index 25d95ae3986..faeb04c1dda 100644
--- a/components/script/dom/stylesheetlist.rs
+++ b/components/script/dom/stylesheetlist.rs
@@ -36,18 +36,14 @@ impl StyleSheetList {
 impl StyleSheetListMethods for StyleSheetList {
     // https://drafts.csswg.org/cssom/#dom-stylesheetlist-length
     fn Length(&self) -> u32 {
-       self.document.with_style_sheets_in_document(|s| s.len() as u32)
+       self.document.stylesheet_count() as u32
     }
 
     // https://drafts.csswg.org/cssom/#dom-stylesheetlist-item
     fn Item(&self, index: u32) -> Option<Root<StyleSheet>> {
-        // XXXManishearth this  doesn't handle the origin clean flag
-        // and is a cors vulnerability
-        self.document.with_style_sheets_in_document(|sheets| {
-            sheets.get(index as usize)
-                  .and_then(|sheet| sheet.node.get_cssom_stylesheet())
-                  .map(Root::upcast)
-        })
+        // XXXManishearth this  doesn't handle the origin clean flag and is a
+        // cors vulnerability
+        self.document.stylesheet_at(index as usize).map(Root::upcast)
     }
 
     // check-tidy: no specs after this line