[webkit-changes] [WebKit/WebKit] 634bc0: [iPad] Fullscreening a Youtube video while in Ligh...

[Jer Noble]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 634bc0b60bf0013b8d061f8e1dd3faeeb93653e4
      https://github.com/WebKit/WebKit/commit/634bc0b60bf0013b8d061f8e1dd3faeeb93653e4
  Author: Jer Noble <jer.noble at apple.com>
  Date:   2023-12-04 (Mon, 04 Dec 2023)

  Changed paths:
    M LayoutTests/fullscreen/full-screen-document-background-color-expected.txt
    M LayoutTests/fullscreen/full-screen-document-background-color.html
    A LayoutTests/fullscreen/resources/backdrop-green.html
    A LayoutTests/fullscreen/resources/backdrop-red-on-green.html
    M Source/WebCore/page/LocalFrameView.cpp

  Log Message:
  -----------
  [iPad] Fullscreening a Youtube video while in Light Mode causes a white bar across the top and bottom of the screen
https://bugs.webkit.org/show_bug.cgi?id=264985
rdar://118530255

Reviewed by Tim Nguyen.

Tests updated: fullscreen/full-screen-document-background-color.html

Take the :fullscreen::backdrop element into account when calculating the documentBackgroundColor.
This will be black by default, so even for websites that have a clear background color on their
fullscreen element, the documentBackgroundColor should usually calculate to black. (Unless they
override the backdrop color, in which case this would the site's preferred behavior).

* LayoutTests/fullscreen/full-screen-document-background-color-expected.txt:
* LayoutTests/fullscreen/full-screen-document-background-color.html:
* LayoutTests/fullscreen/resources/backdrop-green-on-red.html: Added.
* LayoutTests/fullscreen/resources/backdrop-green.html: Added.
* Source/WebCore/page/LocalFrameView.cpp:
(WebCore::LocalFrameView::documentBackgroundColor const):

Canonical link: https://commits.webkit.org/271535@main