[webkit-changes] [WebKit/WebKit] 487c9d: overscroll-behavior: none doesn't prevent overscro...

[Nikos Mouchtaris]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 487c9dfe271c5adf23677f733fa2b812f005ce70
      https://github.com/WebKit/WebKit/commit/487c9dfe271c5adf23677f733fa2b812f005ce70
  Author: Nikolaos Mouchtaris <nmouchtaris at apple.com>
  Date:   2023-01-23 (Mon, 23 Jan 2023)

  Changed paths:
    A LayoutTests/fast/scrolling/ios/overscroll-behavior-non-scrollable-document-expected.txt
    A LayoutTests/fast/scrolling/ios/overscroll-behavior-non-scrollable-document.html
    M LayoutTests/fast/scrolling/sync-scroll-overscroll-behavior-unscrollable-iframe.html
    M Source/WebCore/page/FrameView.cpp
    M Source/WebCore/rendering/RenderLayerScrollableArea.cpp

  Log Message:
  -----------
  overscroll-behavior: none doesn't prevent overscroll when page is too small to scroll
https://bugs.webkit.org/show_bug.cgi?id=244232
rdar://99018981

Reviewed by Simon Fraser.

We should not disallow overscroll behavior on a non-scrollable document
since it should prevent rubberbanding if overscroll behavior ia none

* Source/WebCore/page/FrameView.cpp:
(WebCore::FrameView::horizontalOverscrollBehavior const):
(WebCore::FrameView::verticalOverscrollBehavior const):
* Source/WebCore/rendering/RenderLayerScrollableArea.cpp:
(WebCore::RenderLayerScrollableArea::horizontalOverscrollBehavior const):
(WebCore::RenderLayerScrollableArea::verticalOverscrollBehavior const):

Canonical link: https://commits.webkit.org/259227@main