[webkit-changes] [WebKit/WebKit] dd091d: Style change from overflow:scroll to hidden doesn'...

[mattwoodrow]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: dd091dc0369dc1dabd7fb8a11b114eac2676e6fe
      https://github.com/WebKit/WebKit/commit/dd091dc0369dc1dabd7fb8a11b114eac2676e6fe
  Author: Matt Woodrow <mattwoodrow at apple.com>
  Date:   2025-01-14 (Tue, 14 Jan 2025)

  Changed paths:
    A LayoutTests/compositing/repaint/not-self-painting-layer-stops-compositing-expected.html
    A LayoutTests/compositing/repaint/not-self-painting-layer-stops-compositing.html
    M Source/WebCore/rendering/RenderLayer.cpp

  Log Message:
  -----------
  Style change from overflow:scroll to hidden doesn't repaint correctly.
https://bugs.webkit.org/show_bug.cgi?id=285631
<rdar://140540582>

Reviewed by Simon Fraser.

Always repaint and update rects when compositing status changes, since if the
change also makes the content not self painting, we won't repaint it again.

If this happens while layout is dirty, set the layer dirty bit so that compute
the rects again after the next layout.

* LayoutTests/compositing/repaint/not-self-painting-layer-stops-compositing-expected.html: Added.
* LayoutTests/compositing/repaint/not-self-painting-layer-stops-compositing.html: Added.
* Source/WebCore/rendering/RenderLayer.cpp:
(WebCore::RenderLayer::compositingStatusChanged):

Canonical link: https://commits.webkit.org/288901@main



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