1 files changed, 80 insertions, 0 deletions
diff --git a/layout/style/nsHTMLCSSStyleSheet.h b/layout/style/nsHTMLCSSStyleSheet.h
new file mode 100644
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+++ b/layout/style/nsHTMLCSSStyleSheet.h
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/. */
+
+/*
+ * style sheet and style rule processor representing style attributes
+ */
+
+#ifndef nsHTMLCSSStyleSheet_h_
+#define nsHTMLCSSStyleSheet_h_
+
+#include "mozilla/Attributes.h"
+#include "mozilla/MemoryReporting.h"
+
+#include "nsDataHashtable.h"
+#include "nsIStyleRuleProcessor.h"
+
+class nsRuleWalker;
+struct MiscContainer;
+
+namespace mozilla {
+enum class CSSPseudoElementType : uint8_t;
+namespace dom {
+class Element;
+} // namespace dom
+} // namespace mozilla
+
+class nsHTMLCSSStyleSheet final : public nsIStyleRuleProcessor
+{
+public:
+  nsHTMLCSSStyleSheet();
+
+  NS_DECL_ISUPPORTS
+
+  // nsIStyleRuleProcessor
+  virtual void RulesMatching(ElementRuleProcessorData* aData) override;
+  virtual void RulesMatching(PseudoElementRuleProcessorData* aData) override;
+  virtual void RulesMatching(AnonBoxRuleProcessorData* aData) override;
+#ifdef MOZ_XUL
+  virtual void RulesMatching(XULTreeRuleProcessorData* aData) override;
+#endif
+  virtual nsRestyleHint HasStateDependentStyle(StateRuleProcessorData* aData) override;
+  virtual nsRestyleHint HasStateDependentStyle(PseudoElementStateRuleProcessorData* aData) override;
+  virtual bool HasDocumentStateDependentStyle(StateRuleProcessorData* aData) override;
+  virtual nsRestyleHint
+    HasAttributeDependentStyle(AttributeRuleProcessorData* aData,
+                               mozilla::RestyleHintData& aRestyleHintDataResult) override;
+  virtual bool MediumFeaturesChanged(nsPresContext* aPresContext) override;
+  virtual size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf)
+    const MOZ_MUST_OVERRIDE override;
+  virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf)
+    const MOZ_MUST_OVERRIDE override;
+
+  // Variants of RulesMatching method above that is specific to this
+  // rule processor.
+  void ElementRulesMatching(nsPresContext* aPresContext,
+                            mozilla::dom::Element* aElement,
+                            nsRuleWalker* aRuleWalker);
+  // aPseudoElement here is the content node for the pseudo-element, not
+  // its corresponding real element.
+  void PseudoElementRulesMatching(mozilla::dom::Element* aPseudoElement,
+                                  mozilla::CSSPseudoElementType aPseudoType,
+                                  nsRuleWalker* aRuleWalker);
+
+  void CacheStyleAttr(const nsAString& aSerialized, MiscContainer* aValue);
+  void EvictStyleAttr(const nsAString& aSerialized, MiscContainer* aValue);
+  MiscContainer* LookupStyleAttr(const nsAString& aSerialized);
+
+private: 
+  ~nsHTMLCSSStyleSheet();
+
+  nsHTMLCSSStyleSheet(const nsHTMLCSSStyleSheet& aCopy) = delete;
+  nsHTMLCSSStyleSheet& operator=(const nsHTMLCSSStyleSheet& aCopy) = delete;
+
+protected:
+  nsDataHashtable<nsStringHashKey, MiscContainer*> mCachedStyleAttrs;
+};
+
+#endif /* !defined(nsHTMLCSSStyleSheet_h_) */