[webkit-changes] [WebKit/WebKit] a1803b: Make RepaintRegionAccumulator only try to work in ...

[Brady Eidson]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: a1803bafaa53bf1eed8c86ad411f4247732d4233
      https://github.com/WebKit/WebKit/commit/a1803bafaa53bf1eed8c86ad411f4247732d4233
  Author: Brady Eidson <beidson at apple.com>
  Date:   2025-01-17 (Fri, 17 Jan 2025)

  Changed paths:
    M Source/WebCore/rendering/RenderView.cpp

  Log Message:
  -----------
  Make RepaintRegionAccumulator only try to work in the main frame
rdar://143161246
https://bugs.webkit.org/show_bug.cgi?id=286181

Reviewed by Simon Fraser.

RepaintRegionAccumulator's attempt to walk up to the top document's RenderView is a WebKit1 optimization
from a different era.

In modern WebKit, iframes already don't go down that code path (see RenderView::repaintViewRectangle)

This simplification of RepaintRegionAccumulator makes it represent reality, in addition to getting rid
of some confusion with regards to site isolation.

* Source/WebCore/rendering/RenderView.cpp:
(WebCore::RenderView::RepaintRegionAccumulator::RepaintRegionAccumulator):

Canonical link: https://commits.webkit.org/289099@main



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