Lazy Parse CSS

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

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2006, 2007, 2012 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 74 matching lines @@
       m_isMutable(false),
       m_hasFontFaceRule(o.m_hasFontFaceRule),
       m_hasViewportRule(o.m_hasViewportRule),
       m_hasMediaQueries(o.m_hasMediaQueries),
       m_hasSingleOwnerDocument(true),
       m_isUsedFromTextCache(false),
       m_parserContext(o.m_parserContext) {
   // FIXME: Copy import rules.
   ASSERT(o.m_importRules.isEmpty());
 
+  // LazyParseCSS: Copying child rules is a strict point for lazy parsing, so
+  // there is no need to copy lazy parsing state here.
   for (unsigned i = 0; i < m_childRules.size(); ++i)
     m_childRules[i] = o.m_childRules[i]->copy();
 }
 
 StyleSheetContents::~StyleSheetContents() {}
 
 void StyleSheetContents::setHasSyntacticallyValidCSSHeader(bool isValidCss) {
   m_hasSyntacticallyValidCSSHeader = isValidCss;
 }
 
@@ skipping 239 matching lines @@
   String sheetText = cachedStyleSheet->sheetText(mimeTypeCheck);
 
   const ResourceResponse& response = cachedStyleSheet->response();
   m_sourceMapURL = response.httpHeaderField(HTTPNames::SourceMap);
   if (m_sourceMapURL.isEmpty()) {
     // Try to get deprecated header.
     m_sourceMapURL = response.httpHeaderField(HTTPNames::X_SourceMap);
   }
 
   CSSParserContext context(parserContext(), UseCounter::getFrom(this));
-  CSSParser::parseSheet(context, this, sheetText);
+  CSSParser::parseSheet(context, this, sheetText,
+                        RuntimeEnabledFeatures::lazyParseCSSEnabled());
 }
 
 void StyleSheetContents::parseString(const String& sheetText) {
   parseStringAtPosition(sheetText, TextPosition::minimumPosition());
 }
 
 void StyleSheetContents::parseStringAtPosition(
     const String& sheetText,
     const TextPosition& startPosition) {
   CSSParserContext context(parserContext(), UseCounter::getFrom(this));
@@ skipping 106 matching lines @@
   StyleSheetContents* root = rootStyleSheet();
   return root->clientSingleOwnerDocument();
 }
 
 static bool childRulesHaveFailedOrCanceledSubresources(
     const HeapVector<Member<StyleRuleBase>>& rules) {
   for (unsigned i = 0; i < rules.size(); ++i) {
     const StyleRuleBase* rule = rules[i].get();
     switch (rule->type()) {
       case StyleRuleBase::Style:
-        if (toStyleRule(rule)->properties().hasFailedOrCanceledSubresources())
+        if (toStyleRule(rule)->propertiesHaveFailedOrCanceledSubresources())
           return true;
         break;
       case StyleRuleBase::FontFace:
         if (toStyleRuleFontFace(rule)
                 ->properties()
                 .hasFailedOrCanceledSubresources())
           return true;
         break;
       case StyleRuleBase::Media:
         if (childRulesHaveFailedOrCanceledSubresources(
@@ skipping 174 matching lines @@
   visitor->trace(m_importRules);
   visitor->trace(m_namespaceRules);
   visitor->trace(m_childRules);
   visitor->trace(m_loadingClients);
   visitor->trace(m_completedClients);
   visitor->trace(m_ruleSet);
   visitor->trace(m_referencedFromResource);
 }
 
 }  // namespace blink