[webkit-changes] [WebKit/WebKit] 9789cd: REGRESSION(256571 at main): DrawingAreaCoordinatedGra...

[Žan Doberšek]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 9789cdecc95b14778b18fb219305c0d8fd74a1ec
      https://github.com/WebKit/WebKit/commit/9789cdecc95b14778b18fb219305c0d8fd74a1ec
  Author: Žan Doberšek <zdobersek at igalia.com>
  Date:   2023-02-17 (Fri, 17 Feb 2023)

  Changed paths:
    M Source/WebKit/WebProcess/WebPage/CoordinatedGraphics/DrawingAreaCoordinatedGraphics.cpp
    M Source/WebKit/WebProcess/WebPage/CoordinatedGraphics/DrawingAreaCoordinatedGraphics.h

  Log Message:
  -----------
  REGRESSION(256571 at main): DrawingAreaCoordinatedGraphics should handle registering scrolling trees
https://bugs.webkit.org/show_bug.cgi?id=252462

Reviewed by Carlos Garcia Campos.

Override the registerScrollingTree and unregisterScrollingTree methods on the
DrawingAreaCoordinatedGraphics, (un)registering the scrolling tree on the
associated WebPage with the WebProcess-specific EventDispatcher instance. This
enables EventDispatcher to dispatch wheel events directly against the correct
ScrollingTree, instead of diverting them to the main thread when no such
ScrollingTree is found.

* Source/WebKit/WebProcess/WebPage/CoordinatedGraphics/DrawingAreaCoordinatedGraphics.cpp:
(WebKit::DrawingAreaCoordinatedGraphics::registerScrollingTree):
(WebKit::DrawingAreaCoordinatedGraphics::unregisterScrollingTree):
* Source/WebKit/WebProcess/WebPage/CoordinatedGraphics/DrawingAreaCoordinatedGraphics.h:

Canonical link: https://commits.webkit.org/260454@main