[webkit-changes] [WebKit/WebKit] ab8822: [CSS Nesting] Fix parsing of nested at-rules with ...

[Matthieu Dubet]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: ab88221743a99d533cee3c21c2b4de51cbf87d6b
      https://github.com/WebKit/WebKit/commit/ab88221743a99d533cee3c21c2b4de51cbf87d6b
  Author: Matthieu Dubet <m_dubet at apple.com>
  Date:   2023-04-17 (Mon, 17 Apr 2023)

  Changed paths:
    M LayoutTests/imported/w3c/web-platform-tests/css/css-nesting/cssom-expected.txt
    M Source/WebCore/css/parser/CSSParserImpl.cpp

  Log Message:
  -----------
  [CSS Nesting] Fix parsing of nested at-rules with CSSOM
https://bugs.webkit.org/show_bug.cgi?id=255530
rdar://107760234

Reviewed by Antti Koivisto.

CSS OM insertion can "bypass" the normal stack by inserting at an arbitrarily
deeply nested context.
We already have isNestedContext() function to check for this, but it was
not used here unfortunately.

* LayoutTests/imported/w3c/web-platform-tests/css/css-nesting/cssom-expected.txt:
* Source/WebCore/css/parser/CSSParserImpl.cpp:
(WebCore::CSSParserImpl::consumeQualifiedRule):
(WebCore::CSSParserImpl::consumeRegularRuleList):
(WebCore::CSSParserImpl::consumeDeclarationListOrStyleBlockHelper):

Canonical link: https://commits.webkit.org/263028@main