Bug 1370502 - stylo: Implement ServoStyleRule::SelectorMatchesElement. r=emilio

MozReview-Commit-ID: JMoBRHzDQZq

--HG--
extra : rebase_source : eed6bdf6a64ee10464abdcb7b120ecdd6a2698a7

layout/style/ServoBindingList.h

@@ -157,6 +157,9 @@ SERVO_BINDING_FUNC(Servo_StyleRule_GetSpecificityAtIndex, void,
                    uint64_t* specificity)
 SERVO_BINDING_FUNC(Servo_StyleRule_GetSelectorCount, void,
                    RawServoStyleRuleBorrowed rule, uint32_t* count)
+SERVO_BINDING_FUNC(Servo_StyleRule_SelectorMatchesElement, bool,
+                   RawServoStyleRuleBorrowed, RawGeckoElementBorrowed,
+                   uint32_t index, mozilla::CSSPseudoElementType pseudo_type)
 SERVO_BINDING_FUNC(Servo_ImportRule_GetHref, void,
                    RawServoImportRuleBorrowed rule, nsAString* result)
 SERVO_BINDING_FUNC(Servo_ImportRule_GetSheet,

layout/style/ServoStyleRule.cpp

@@ -279,7 +279,14 @@ ServoStyleRule::SelectorMatchesElement(Element* aElement,
                                        const nsAString& aPseudo,
                                        bool* aMatches)
 {
-  // TODO Bug 1370502
+  nsCOMPtr<nsIAtom> pseudoElt = NS_Atomize(aPseudo);
+  const CSSPseudoElementType pseudoType =
+    nsCSSPseudoElements::GetPseudoType(pseudoElt,
+                                       CSSEnabledState::eIgnoreEnabledState);
+  *aMatches = Servo_StyleRule_SelectorMatchesElement(mRawRule,
+                                                     aElement,
+                                                     aSelectorIndex,
+                                                     pseudoType);
   return NS_OK;
 }