Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 7e8c765bf94d37bbbf56c279c81b63957cb88fff
https://github.com/WebKit/WebKit/commit/7e8c765bf94d37bbbf56c279c81b63957cb88fff
Author: Andy Estes <aes...@apple.com>
Date: 2023-10-10 (Tue, 10 Oct 2023)
Changed paths:
M Source/WebKit/UIProcess/mac/WKFullScreenWindowController.mm
M Tools/TestWebKitAPI/Tests/WebKitCocoa/FullscreenDelegate.html
M Tools/TestWebKitAPI/Tests/WebKitCocoa/FullscreenDelegate.mm
Log Message:
-----------
Unable to enter fullscreen in Counterstrike (http://game.play-cs.com) in
Safari 16.3
https://bugs.webkit.org/show_bug.cgi?id=251648
rdar://104984915
Reviewed by Jer Noble.
When entering fullscreen, WKFullScreenWindowController calls
WebPageProxy::setSuppressVisibilityUpdates to suppress visibility updates while
the web view moves to
the new fullscreen window, since updating visibility is unnecessary when
transitioning to fullscreen
and can even cause bugs (see the comment in -[WKFullScreenWindowController
enterFullScreen:]). It
ends suppression in -beganEnterFullScreenWithInitialFrame:finalFrame: and
schedules an activity
state update, but this occurs at a time when AppKit considers the fullscreen
window to be occluded.
As a result a `visibilitychange` event is dispatched where
`document.visibilityState == 'hidden'`,
and play-cs.com responds to this event by exiting fullscreen. The upshot is
that the user cannot
stay in fullscreen as the page exits this mode as soon as the user enters it.
Resolved this by extending the period where visibility updates are suppressed
to when
-finishedEnterFullScreenAnimation: is called. At this point AppKit no longer
considers the
fullscreen window to be occluded, so WebPageProxy detects no change in activity
state and does not
dispatch any `visibilitychange` events. This matches the behavior of Firefox
and Chrome on macOS,
which also do not dispatch `visiblitychange` events when entering fullscreen.
Added an API test.
* Source/WebKit/UIProcess/mac/WKFullScreenWindowController.mm:
(-[WKFullScreenWindowController enterFullScreen:]):
(-[WKFullScreenWindowController
beganEnterFullScreenWithInitialFrame:finalFrame:]):
(-[WKFullScreenWindowController finishedEnterFullScreenAnimation:]):
* Tools/TestWebKitAPI/Tests/WebKitCocoa/FullscreenDelegate.html:
* Tools/TestWebKitAPI/Tests/WebKitCocoa/FullscreenDelegate.mm:
(-[FullscreenDelegateMessageHandler
userContentController:didReceiveScriptMessage:]):
(TestWebKitAPI::TEST):
Canonical link: https://commits.webkit.org/269150@main
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