[webkit-changes] [WebKit/WebKit] 1ffbfe: Disallow caching of StyleSheetContents that uses n...

[Antti Koivisto]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 1ffbfef4c616e64e54e0a9257f1268ab3ba8f227
      https://github.com/WebKit/WebKit/commit/1ffbfef4c616e64e54e0a9257f1268ab3ba8f227
  Author: Antti Koivisto <antti at apple.com>
  Date:   2023-05-08 (Mon, 08 May 2023)

  Changed paths:
    M Source/WebCore/css/CSSGroupingRule.cpp
    M Source/WebCore/css/CSSStyleSheet.cpp
    M Source/WebCore/css/StyleSheetContents.cpp
    M Source/WebCore/css/StyleSheetContents.h
    M Source/WebCore/css/parser/CSSParserImpl.cpp

  Log Message:
  -----------
  Disallow caching of StyleSheetContents that uses nesting
https://bugs.webkit.org/show_bug.cgi?id=256449
rdar://108758349

Reviewed by Alan Baradlay.

Mutations to cached document may affect other stylesheets.

* Source/WebCore/css/CSSGroupingRule.cpp:
(WebCore::CSSGroupingRule::prepareChildStyleRuleForNesting):
* Source/WebCore/css/CSSStyleSheet.cpp:
(WebCore::CSSStyleSheet::prepareChildStyleRuleForNesting):
* Source/WebCore/css/StyleSheetContents.cpp:
(WebCore::StyleSheetContents::isCacheable const):
* Source/WebCore/css/StyleSheetContents.h:
* Source/WebCore/css/parser/CSSParserImpl.cpp:
(WebCore::CSSParserImpl::consumeRegularRuleList):
(WebCore::CSSParserImpl::consumeStyleRule):

Canonical link: https://commits.webkit.org/263799@main