[webkit-changes] [WebKit/WebKit] 2658d9: Scaled scroller with event handler results in inva...

[Simon Fraser]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 2658d9543648f73d307da682ed908f27bcfbfc7b
      https://github.com/WebKit/WebKit/commit/2658d9543648f73d307da682ed908f27bcfbfc7b
  Author: Simon Fraser <simon.fraser at apple.com>
  Date:   2024-06-07 (Fri, 07 Jun 2024)

  Changed paths:
    A LayoutTests/fast/scrolling/mac/region-decoding-failure-expected.txt
    A LayoutTests/fast/scrolling/mac/region-decoding-failure.html
    M Source/WebCore/rendering/RenderObject.cpp

  Log Message:
  -----------
  Scaled scroller with event handler results in invalid wheel event Region
https://bugs.webkit.org/show_bug.cgi?id=275259
rdar://118512508

Reviewed by Alan Baradlay.

If we need to generate an event region which has huge root-relative bounds (due to nested scales),
make sure we clamp the result returned by `absoluteBoundingBoxRect()` to be a valid IntRect.

* LayoutTests/fast/scrolling/mac/region-decoding-failure-expected.txt: Added.
* LayoutTests/fast/scrolling/mac/region-decoding-failure.html: Added.
* Source/WebCore/rendering/RenderObject.cpp:
(WebCore::RenderObject::absoluteBoundingBoxRect const):

Canonical link: https://commits.webkit.org/279837@main



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