Move Document global rule data to CSSGlobalRuleSet.

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

+// 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.
+
+#include "core/css/CSSGlobalRuleSet.h"
+
+#include "core/css/CSSDefaultStyleSheets.h"
+#include "core/css/RuleSet.h"
+#include "core/dom/CSSSelectorWatch.h"
+#include "core/dom/Document.h"
+#include "core/dom/StyleEngine.h"
+
+namespace blink {
+
+void CSSGlobalRuleSet::initWatchedSelectorsRuleSet(Document& document) {
+  markDirty();
+  m_watchedSelectorsRuleSet = nullptr;
+  CSSSelectorWatch* watch = CSSSelectorWatch::fromIfExists(document);
+  if (!watch)
+    return;
+  const HeapVector<Member<StyleRule>>& watchedSelectors =
+      watch->watchedCallbackSelectors();
+  if (!watchedSelectors.size())
+    return;
+  m_watchedSelectorsRuleSet = RuleSet::create();
+  for (unsigned i = 0; i < watchedSelectors.size(); ++i) {
+    m_watchedSelectorsRuleSet->addStyleRule(watchedSelectors[i],
+                                            RuleHasNoSpecialState);
+  }
+}
+
+static RuleSet* makeRuleSet(const HeapVector<RuleFeature>& rules) {
+  size_t size = rules.size();
+  if (!size)
+    return nullptr;
+  RuleSet* ruleSet = RuleSet::create();
+  for (size_t i = 0; i < size; ++i) {
+    ruleSet->addRule(rules[i].rule, rules[i].selectorIndex,
+                     rules[i].hasDocumentSecurityOrigin
+                         ? RuleHasDocumentSecurityOrigin
+                         : RuleHasNoSpecialState);
+  }
+  return ruleSet;
+}
+
+void CSSGlobalRuleSet::update(Document& document) {
+  if (!m_isDirty)
+    return;
+
+  m_isDirty = false;
+  m_features.clear();
+  m_hasFullscreenUAStyle = false;
+
+  CSSDefaultStyleSheets& defaultStyleSheets = CSSDefaultStyleSheets::instance();
+  if (defaultStyleSheets.defaultStyle()) {
+    m_features.add(defaultStyleSheets.defaultStyle()->features());
+    m_hasFullscreenUAStyle = defaultStyleSheets.fullscreenStyleSheet();
+  }
+
+  if (document.isViewSource())
+    m_features.add(defaultStyleSheets.defaultViewSourceStyle()->features());
+
+  if (m_watchedSelectorsRuleSet)
+    m_features.add(m_watchedSelectorsRuleSet->features());
+
+  document.styleEngine().collectScopedStyleFeaturesTo(m_features);
+
+  m_siblingRuleSet = makeRuleSet(m_features.siblingRules);
+  m_uncommonAttributeRuleSet = makeRuleSet(m_features.uncommonAttributeRules);
+}
+
+DEFINE_TRACE(CSSGlobalRuleSet) {
+  visitor->trace(m_features);
+  visitor->trace(m_siblingRuleSet);
+  visitor->trace(m_uncommonAttributeRuleSet);
+  visitor->trace(m_watchedSelectorsRuleSet);
+}
+
+}  // namespace blink