Bug 1315601 part 14 - Add InsertRuleIntoGroup support to ServoStyleSheet. r=heycam

MozReview-Commit-ID: GUHtvjQXECW

--HG--
extra : rebase_source : dadf70886038ae4d1d62945ee4f4fbc4a3e756aa

layout/style/ServoCSSRuleList.h

@@ -24,6 +24,7 @@ class ServoCSSRuleList final : public dom::CSSRuleList
 {
 public:
   explicit ServoCSSRuleList(already_AddRefed<ServoCssRules> aRawRules);
+  css::GroupRule* GetParentRule() const { return mParentRule; }
   void SetParentRule(css::GroupRule* aParentRule);
   void SetStyleSheet(StyleSheet* aSheet);
 

layout/style/ServoStyleSheet.cpp

@@ -10,6 +10,7 @@
 #include "mozilla/StyleBackendType.h"
 #include "mozilla/ServoBindings.h"
 #include "mozilla/ServoCSSRuleList.h"
+#include "mozilla/css/GroupRule.h"
 #include "mozilla/dom/CSSRuleList.h"
 
 #include "mozAutoDocUpdate.h"
@@ -202,4 +203,14 @@ ServoStyleSheet::DeleteRuleInternal(uint32_t aIndex, ErrorResult& aRv)
   }
 }
 
+nsresult
+ServoStyleSheet::InsertRuleIntoGroupInternal(const nsAString& aRule,
+                                             css::GroupRule* aGroup,
+                                             uint32_t aIndex)
+{
+  auto rules = static_cast<ServoCSSRuleList*>(aGroup->CssRules());
+  MOZ_ASSERT(rules->GetParentRule() == aGroup);
+  return rules->InsertRule(aRule, aIndex);
+}
+
 } // namespace mozilla

layout/style/ServoStyleSheet.h

@@ -103,6 +103,9 @@ protected:
   uint32_t InsertRuleInternal(const nsAString& aRule,
                               uint32_t aIndex, ErrorResult& aRv);
   void DeleteRuleInternal(uint32_t aIndex, ErrorResult& aRv);
+  nsresult InsertRuleIntoGroupInternal(const nsAString& aRule,
+                                       css::GroupRule* aGroup,
+                                       uint32_t aIndex);
 
   void EnabledStateChangedInternal() {}
 

layout/style/StyleSheet.cpp

@@ -473,8 +473,7 @@ StyleSheet::InsertRuleIntoGroup(const nsAString& aRule,
   if (IsGecko()) {
     result = AsGecko()->InsertRuleIntoGroupInternal(aRule, aGroup, aIndex);
   } else {
-    // TODO
-    result = NS_ERROR_NOT_IMPLEMENTED;
+    result = AsServo()->InsertRuleIntoGroupInternal(aRule, aGroup, aIndex);
   }
   NS_ENSURE_SUCCESS(result, result);