Make MatchingContext::quirks_mode field private, add read-only accessor.

components/selectors/context.rs

@@ -97,8 +97,8 @@ pub struct MatchingContext<'a> {
     /// `RelevantLinkStatus` which tracks the status for the _current_ selector
     /// only.)
     pub relevant_link_found: bool,
-    /// The quirks mode of the document.
-    pub quirks_mode: QuirksMode,
+
+    quirks_mode: QuirksMode,
 }
 
 impl<'a> MatchingContext<'a> {
@@ -134,4 +134,10 @@ impl<'a> MatchingContext<'a> {
             quirks_mode: quirks_mode,
         }
     }
+
+    /// The quirks mode of the document.
+    #[inline]
+    pub fn quirks_mode(&self) -> QuirksMode {
+        self.quirks_mode
+    }
 }

components/selectors/matching.rs

@@ -90,15 +90,15 @@ impl<'a, 'b, Impl> LocalMatchingContext<'a, 'b, Impl>
     /// Updates offset of Selector to show new compound selector.
     /// To be able to correctly re-synthesize main SelectorIter.
     pub fn note_next_sequence(&mut self, selector_iter: &SelectorIter<Impl>) {
-        if let QuirksMode::Quirks = self.shared.quirks_mode {
+        if let QuirksMode::Quirks = self.shared.quirks_mode() {
             self.offset = self.selector.len() - selector_iter.selector_length();
         }
     }
 
     /// Returns true if current compound selector matches :active and :hover quirk.
     /// https://quirks.spec.whatwg.org/#the-active-and-hover-quirk
     pub fn active_hover_quirk_matches(&mut self) -> bool {
-        if self.shared.quirks_mode != QuirksMode::Quirks ||
+        if self.shared.quirks_mode() != QuirksMode::Quirks ||
            self.within_functional_pseudo_class_argument {
             return false;
         }
@@ -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.quirks_mode().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.quirks_mode().classes_and_ids_case_sensitivity())
         }
         Component::AttributeInNoNamespaceExists { ref local_name, ref local_name_lower } => {
             let is_html = element.is_html_element_in_html_document();