[webkit-changes] [WebKit/WebKit] fbf46c: Flex container with `overflow: scroll` does not co...

[Alan Baradlay]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: fbf46c89f807e8d66c1d033b10b70059de910b9a
      https://github.com/WebKit/WebKit/commit/fbf46c89f807e8d66c1d033b10b70059de910b9a
  Author: Alan Baradlay <zalan at apple.com>
  Date:   2025-02-10 (Mon, 10 Feb 2025)

  Changed paths:
    A LayoutTests/imported/w3c/web-platform-tests/css/css-overflow/scrollable-overflow-with-flex-item-margin-inline-end-expected.txt
    A LayoutTests/imported/w3c/web-platform-tests/css/css-overflow/scrollable-overflow-with-flex-item-margin-inline-end.html
    M Source/WebCore/rendering/RenderBox.cpp

  Log Message:
  -----------
  Flex container with `overflow: scroll` does not correctly account for the inline margin end of flex items to determine the scrollable area
https://bugs.webkit.org/show_bug.cgi?id=286149

Reviewed by Antti Koivisto.

"The scrollable overflow area is the union of:
..
The margin areas of grid item and flex item boxes for which the box establishes a containing block.
.."

https://drafts.csswg.org/css-overflow-3/#scrollable

* LayoutTests/imported/w3c/web-platform-tests/css/css-overflow/scrollable-overflow-with-flex-item-margin-inline-end-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/css/css-overflow/scrollable-overflow-with-flex-item-margin-inline-end.html: Added.
* Source/WebCore/rendering/RenderBox.cpp:
(WebCore::RenderBox::layoutOverflowRectForPropagation const):

Canonical link: https://commits.webkit.org/290159@main



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