static bool isCacheableForStyleElement(const StyleSheetContents& contents)
{
// FIXME: Support copying import rules.
if (!contents.importRules().isEmpty())
return false;
// Until import rules are supported in cached sheets it's not possible for loading to fail.
ASSERT(!contents.didLoadErrorOccur());
// It is not the original sheet anymore.
if (contents.isMutable())
return false;
if (!contents.hasSyntacticallyValidCSSHeader())
return false;
return true;
}
void RuleSet::addRulesFromSheet(StyleSheetContents& sheet, const MediaQueryEvaluator& medium, StyleResolver* resolver)
{
for (auto& rule : sheet.importRules()) {
if (rule->styleSheet() && (!rule->mediaQueries() || medium.eval(rule->mediaQueries(), resolver)))
addRulesFromSheet(*rule->styleSheet(), medium, resolver);
}
bool hasDocumentSecurityOrigin = resolver && resolver->document().securityOrigin()->canRequest(sheet.baseURL());
AddRuleFlags addRuleFlags = static_cast<AddRuleFlags>((hasDocumentSecurityOrigin ? RuleHasDocumentSecurityOrigin : 0));
// FIXME: Skip Content Security Policy check when stylesheet is in a user agent shadow tree.
// See <https://bugs.webkit.org/show_bug.cgi?id=146663>.
bool isInitiatingElementInUserAgentShadowTree = false;
addChildRules(sheet.childRules(), medium, resolver, hasDocumentSecurityOrigin, isInitiatingElementInUserAgentShadowTree, addRuleFlags);
if (m_autoShrinkToFitEnabled)
shrinkToFit();
}
