Move Document global rule data to CSSGlobalRuleSet.

third_party/WebKit/Source/core/css/CSSGlobalRuleSet.h

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CSSGlobalRuleSet_h
+#define CSSGlobalRuleSet_h
+
+#include "core/css/RuleFeature.h"
+
+namespace blink {
+
+class Document;
+class RuleSet;
+
+// A per Document collection of CSS metadata used for style matching and
+// invalidation. The data is aggregated from author rulesets from all TreeScopes
+// in the whole Document as well as UA stylesheets and watched selectors which
+// apply to elements in all TreeScopes.
+//
+// TODO(rune@opera.com): We would like to move as much of this data as possible
+// to the ScopedStyleResolver as possible to avoid full reconstruction of these
+// rulesets on shadow tree changes. See https://crbug.com/401359
+
+class CSSGlobalRuleSet {
+  DISALLOW_NEW();
+  WTF_MAKE_NONCOPYABLE(CSSGlobalRuleSet);
+
+ public:
+  CSSGlobalRuleSet() {}
+
+  void initWatchedSelectorsRuleSet(Document&);
+  void markDirty() { m_isDirty = true; }
+  bool isDirty() const { return m_isDirty; }
+  void update(Document&);
+
+  const RuleFeatureSet& ruleFeatureSet() const {
+    RELEASE_ASSERT(m_features.isAlive());
+    return m_features;
+  }
+  RuleSet* siblingRuleSet() const { return m_siblingRuleSet; }
+  RuleSet* uncommonAttributeRuleSet() const {
+    return m_uncommonAttributeRuleSet;
+  }
+  RuleSet* watchedSelectorsRuleSet() const { return m_watchedSelectorsRuleSet; }
+  bool hasFullscreenUAStyle() const { return m_hasFullscreenUAStyle; }
+
+  DECLARE_TRACE();
+
+ private:
+  // Constructed from rules in all TreeScopes including UA style and style
+  // injected from extensions.
+  RuleFeatureSet m_features;
+  Member<RuleSet> m_siblingRuleSet;
+  Member<RuleSet> m_uncommonAttributeRuleSet;
+
+  // Rules injected from extensions.
+  Member<RuleSet> m_watchedSelectorsRuleSet;
+
+  bool m_hasFullscreenUAStyle = false;
+  bool m_isDirty = true;
+};
+
+}  // namespace blink
+
+#endif  // CSSGlobalRuleSet_h