1 files changed, 118 insertions, 0 deletions
diff --git a/layout/style/CSSStyleRule.h b/layout/style/CSSStyleRule.h
new file mode 100644
index 0000000000..abd7c81571
--- /dev/null
+++ b/layout/style/CSSStyleRule.h
@@ -0,0 +1,118 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=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_CSSStyleRule_h
+#define mozilla_CSSStyleRule_h
+
+#include "mozilla/BindingStyleRule.h"
+#include "mozilla/ServoBindingTypes.h"
+#include "mozilla/WeakPtr.h"
+
+#include "nsDOMCSSDeclaration.h"
+
+namespace mozilla {
+
+class DeclarationBlock;
+
+namespace dom {
+class DocGroup;
+class CSSStyleRule;
+
+class CSSStyleRuleDeclaration final : public nsDOMCSSDeclaration {
+ public:
+  NS_DECL_ISUPPORTS_INHERITED
+
+  css::Rule* GetParentRule() final;
+  nsINode* GetAssociatedNode() const final;
+  nsISupports* GetParentObject() const final;
+
+ protected:
+  mozilla::DeclarationBlock* GetOrCreateCSSDeclaration(
+      Operation aOperation, mozilla::DeclarationBlock** aCreated) final;
+  nsresult SetCSSDeclaration(DeclarationBlock* aDecl,
+                             MutationClosureData* aClosureData) final;
+  Document* DocToUpdate() final;
+  ParsingEnvironment GetParsingEnvironment(
+      nsIPrincipal* aSubjectPrincipal) const final;
+
+ private:
+  // For accessing the constructor.
+  friend class CSSStyleRule;
+
+  explicit CSSStyleRuleDeclaration(
+      already_AddRefed<StyleLockedDeclarationBlock> aDecls);
+  ~CSSStyleRuleDeclaration();
+
+  inline CSSStyleRule* Rule();
+  inline const CSSStyleRule* Rule() const;
+
+  void SetRawAfterClone(RefPtr<StyleLockedDeclarationBlock>);
+
+  RefPtr<DeclarationBlock> mDecls;
+};
+
+class CSSStyleRule final : public BindingStyleRule, public SupportsWeakPtr {
+ public:
+  CSSStyleRule(already_AddRefed<StyleLockedStyleRule> aRawRule,
+               StyleSheet* aSheet, css::Rule* aParentRule, uint32_t aLine,
+               uint32_t aColumn);
+
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(CSSStyleRule,
+                                                         css::Rule)
+  bool IsCCLeaf() const final MOZ_MUST_OVERRIDE;
+
+  uint32_t GetSelectorCount() override;
+  nsresult GetSelectorText(uint32_t aSelectorIndex, nsACString& aText) override;
+  nsresult GetSpecificity(uint32_t aSelectorIndex,
+                          uint64_t* aSpecificity) override;
+  nsresult SelectorMatchesElement(dom::Element* aElement,
+                                  uint32_t aSelectorIndex,
+                                  const nsAString& aPseudo,
+                                  bool aRelevantLinkVisited,
+                                  bool* aMatches) override;
+  NotNull<DeclarationBlock*> GetDeclarationBlock() const override;
+
+  // WebIDL interface
+  StyleCssRuleType Type() const final;
+  void GetCssText(nsACString& aCssText) const final;
+  void GetSelectorText(nsACString& aSelectorText) final;
+  void SetSelectorText(const nsACString& aSelectorText) final;
+  nsICSSDeclaration* Style() final;
+
+  StyleLockedStyleRule* Raw() const { return mRawRule; }
+  void SetRawAfterClone(RefPtr<StyleLockedStyleRule>);
+
+  // Methods of mozilla::css::Rule
+  size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const final;
+#ifdef DEBUG
+  void List(FILE* out = stdout, int32_t aIndent = 0) const final;
+#endif
+
+ private:
+  ~CSSStyleRule() = default;
+
+  // For computing the offset of mDecls.
+  friend class CSSStyleRuleDeclaration;
+
+  RefPtr<StyleLockedStyleRule> mRawRule;
+  CSSStyleRuleDeclaration mDecls;
+};
+
+CSSStyleRule* CSSStyleRuleDeclaration::Rule() {
+  return reinterpret_cast<CSSStyleRule*>(reinterpret_cast<uint8_t*>(this) -
+                                         offsetof(CSSStyleRule, mDecls));
+}
+
+const CSSStyleRule* CSSStyleRuleDeclaration::Rule() const {
+  return reinterpret_cast<const CSSStyleRule*>(
+      reinterpret_cast<const uint8_t*>(this) - offsetof(CSSStyleRule, mDecls));
+}
+
+}  // namespace dom
+}  // namespace mozilla
+
+#endif  // mozilla_CSSStyleRule_h