Moved applyRuleSetChanges functions to StyleEngine.

third_party/WebKit/Source/core/css/ActiveStyleSheets.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/ActiveStyleSheets.h"
 
 #include "core/css/CSSStyleSheet.h"
 #include "core/css/RuleSet.h"
 #include "core/css/resolver/ScopedStyleResolver.h"
 #include "core/dom/ContainerNode.h"
@@ skipping 85 matching lines @@
     // Active rules for the given stylesheet changed.
     // DOM, CSSOM, or media query changes.
     if (sheet1.second)
       changedRuleSets.append(sheet1.second);
     if (sheet2.second)
       changedRuleSets.append(sheet2.second);
   }
   return changedRuleSets.size() ? ActiveSheetsChanged : NoActiveSheetsChanged;
 }
 
-namespace {
-
-enum RuleSetFlags {
-  FontFaceRules = 1 << 0,
-  KeyframesRules = 1 << 1,
-  FullRecalcRules = 1 << 2
-};
-
-unsigned getRuleSetFlags(const HeapVector<Member<RuleSet>> ruleSets) {
-  unsigned flags = 0;
-  for (auto& ruleSet : ruleSets) {
-    ruleSet->compactRulesIfNeeded();
-    if (!ruleSet->keyframesRules().isEmpty())
-      flags |= KeyframesRules;
-    if (!ruleSet->fontFaceRules().isEmpty())
-      flags |= FontFaceRules;
-    if (ruleSet->needsFullRecalcForRuleSetInvalidation())
-      flags |= FullRecalcRules;
-  }
-  return flags;
-}
-
-}  // namespace
-
-void applyRuleSetChanges(StyleEngine& engine,
-                         TreeScope& treeScope,
-                         const ActiveStyleSheetVector& oldStyleSheets,
-                         const ActiveStyleSheetVector& newStyleSheets) {
-  HeapVector<Member<RuleSet>> changedRuleSets;
-
-  ActiveSheetsChange change =
-      compareActiveStyleSheets(oldStyleSheets, newStyleSheets, changedRuleSets);
-  if (change == NoActiveSheetsChanged)
-    return;
-
-  // TODO(rune@opera.com): engine.setNeedsGlobalRuleSetUpdate();
-
-  unsigned changedRuleFlags = getRuleSetFlags(changedRuleSets);
-  bool fontsChanged = treeScope.rootNode().isDocumentNode() &&
-                      (changedRuleFlags & FontFaceRules);
-  unsigned appendStartIndex = 0;
-
-  // We don't need to clear the font cache if new sheets are appended.
-  if (fontsChanged && change == ActiveSheetsChanged)
-    engine.clearFontCache();
-
-  // - If all sheets were removed, we remove the ScopedStyleResolver.
-  // - If new sheets were appended to existing ones, start appending after the
-  //   common prefix.
-  // - For other diffs, reset author style and re-add all sheets for the
-  //   TreeScope.
-  if (treeScope.scopedStyleResolver()) {
-    if (newStyleSheets.isEmpty())
-      engine.resetAuthorStyle(treeScope);
-    else if (change == ActiveSheetsAppended)
-      appendStartIndex = oldStyleSheets.size();
-    else
-      treeScope.scopedStyleResolver()->resetAuthorStyle();
-  }
-
-  if (!newStyleSheets.isEmpty()) {
-    treeScope.ensureScopedStyleResolver().appendActiveStyleSheets(
-        appendStartIndex, newStyleSheets);
-  }
-
-  if (treeScope.document().hasPendingForcedStyleRecalc())
-    return;
-
-  if (!treeScope.document().body() ||
-      treeScope.document().hasNodesWithPlaceholderStyle()) {
-    treeScope.document().setNeedsStyleRecalc(
-        SubtreeStyleChange, StyleChangeReasonForTracing::create(
-                                StyleChangeReason::CleanupPlaceholderStyles));
-    return;
-  }
-
-  if (changedRuleFlags & KeyframesRules)
-    ScopedStyleResolver::keyframesRulesAdded(treeScope);
-
-  if (fontsChanged || (changedRuleFlags & FullRecalcRules)) {
-    ScopedStyleResolver::invalidationRootForTreeScope(treeScope)
-        .setNeedsStyleRecalc(SubtreeStyleChange,
-                             StyleChangeReasonForTracing::create(
-                                 StyleChangeReason::ActiveStylesheetsUpdate));
-    return;
-  }
-
-  engine.scheduleInvalidationsForRuleSets(treeScope, changedRuleSets);
-}
-
 }  // namespace blink