Pre-compute classes and IDs case-sensitivity

components/selectors/context.rs

@@ -99,6 +99,7 @@ pub struct MatchingContext<'a> {
     pub relevant_link_found: bool,
 
     quirks_mode: QuirksMode,
+    classes_and_ids_case_sensitivity: CaseSensitivity,
 }
 
 impl<'a> MatchingContext<'a> {
@@ -115,6 +116,7 @@ impl<'a> MatchingContext<'a> {
             visited_handling: VisitedHandlingMode::AllLinksUnvisited,
             relevant_link_found: false,
             quirks_mode: quirks_mode,
+            classes_and_ids_case_sensitivity: quirks_mode.classes_and_ids_case_sensitivity(),
         }
     }
 
@@ -132,6 +134,7 @@ impl<'a> MatchingContext<'a> {
             visited_handling: visited_handling,
             relevant_link_found: false,
             quirks_mode: quirks_mode,
+            classes_and_ids_case_sensitivity: quirks_mode.classes_and_ids_case_sensitivity(),
         }
     }
 
@@ -140,4 +143,10 @@ impl<'a> MatchingContext<'a> {
     pub fn quirks_mode(&self) -> QuirksMode {
         self.quirks_mode
     }
+
+    /// The case-sensitivity for class and ID selectors
+    #[inline]
+    pub fn classes_and_ids_case_sensitivity(&self) -> CaseSensitivity {
+        self.classes_and_ids_case_sensitivity
+    }
 }

components/selectors/matching.rs

@@ -549,10 +549,10 @@ fn matches_simple_selector<E, F>(
             element.get_namespace() == ns.borrow()
         }
         Component::ID(ref id) => {
-            element.has_id(id, context.shared.quirks_mode().classes_and_ids_case_sensitivity())
+            element.has_id(id, context.shared.classes_and_ids_case_sensitivity())
         }
         Component::Class(ref class) => {
-            element.has_class(class, context.shared.quirks_mode().classes_and_ids_case_sensitivity())
+            element.has_class(class, context.shared.classes_and_ids_case_sensitivity())
         }
         Component::AttributeInNoNamespaceExists { ref local_name, ref local_name_lower } => {
             let is_html = element.is_html_element_in_html_document();