1 files changed, 107 insertions, 0 deletions
diff --git a/layout/style/CSSMarginRule.h b/layout/style/CSSMarginRule.h
new file mode 100644
index 0000000000..0ad5f60dbd
--- /dev/null
+++ b/layout/style/CSSMarginRule.h
@@ -0,0 +1,107 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_dom_CSSMarginRule_h
+#define mozilla_dom_CSSMarginRule_h
+
+#include "mozilla/css/Rule.h"
+#include "mozilla/ServoBindingTypes.h"
+
+#include "nsDOMCSSDeclaration.h"
+#include "nsICSSDeclaration.h"
+
+namespace mozilla {
+class DeclarationBlock;
+
+namespace dom {
+class CSSMarginRule;
+
+class CSSMarginRuleDeclaration final : public nsDOMCSSDeclaration {
+ public:
+  NS_DECL_ISUPPORTS_INHERITED
+
+  css::Rule* GetParentRule() final;
+  nsINode* GetAssociatedNode() const final;
+  nsISupports* GetParentObject() const final;
+
+ protected:
+  DeclarationBlock* GetOrCreateCSSDeclaration(
+      Operation aOperation, DeclarationBlock** aCreated) final;
+  nsresult SetCSSDeclaration(DeclarationBlock* aDecl,
+                             MutationClosureData* aClosureData) final;
+  Document* DocToUpdate() final { return nullptr; }
+  nsDOMCSSDeclaration::ParsingEnvironment GetParsingEnvironment(
+      nsIPrincipal* aSubjectPrincipal) const final;
+
+ private:
+  // For accessing the constructor.
+  friend class CSSMarginRule;
+
+  explicit CSSMarginRuleDeclaration(
+      already_AddRefed<StyleLockedDeclarationBlock> aDecls);
+  void SetRawAfterClone(RefPtr<StyleLockedDeclarationBlock>);
+
+  ~CSSMarginRuleDeclaration();
+
+  inline CSSMarginRule* Rule();
+  inline const CSSMarginRule* Rule() const;
+
+  RefPtr<DeclarationBlock> mDecls;
+};
+
+class CSSMarginRule final : public css::Rule {
+ public:
+  CSSMarginRule(RefPtr<StyleMarginRule> aRawRule, StyleSheet* aSheet,
+                css::Rule* aParentRule, uint32_t aLine, uint32_t aColumn);
+
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(CSSMarginRule,
+                                                         css::Rule)
+
+  bool IsCCLeaf() const final;
+
+  StyleMarginRule* Raw() const { return mRawRule; }
+  void SetRawAfterClone(RefPtr<StyleMarginRule>);
+
+  // WebIDL interfaces
+  StyleCssRuleType Type() const final;
+  void GetCssText(nsACString& aCssText) const final;
+  nsICSSDeclaration* Style() { return &mDecls; }
+
+  void GetName(nsACString& aRuleName) const;
+
+  size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const final;
+
+#ifdef DEBUG
+  void List(FILE* out = stdout, int32_t aIndent = 0) const final;
+#endif
+
+  JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) final;
+
+ private:
+  ~CSSMarginRule() = default;
+
+  // For computing the offset of mDecls.
+  friend class CSSMarginRuleDeclaration;
+
+  RefPtr<StyleMarginRule> mRawRule;
+  CSSMarginRuleDeclaration mDecls;
+};
+
+CSSMarginRule* CSSMarginRuleDeclaration::Rule() {
+  return reinterpret_cast<CSSMarginRule*>(reinterpret_cast<uint8_t*>(this) -
+                                          offsetof(CSSMarginRule, mDecls));
+}
+
+const CSSMarginRule* CSSMarginRuleDeclaration::Rule() const {
+  return reinterpret_cast<const CSSMarginRule*>(
+      reinterpret_cast<const uint8_t*>(this) - offsetof(CSSMarginRule, mDecls));
+}
+
+}  // namespace dom
+}  // namespace mozilla
+
+#endif  // mozilla_dom_CSSMarginRule_h