[webkit-changes] [WebKit/WebKit] 76e52d: [WebXR] Allow audio and media sessions to continue...

[Ada Chan]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 76e52d168312e91a83bd2f9db3535f6921b3cd87
      https://github.com/WebKit/WebKit/commit/76e52d168312e91a83bd2f9db3535f6921b3cd87
  Author: Ada Chan <adachan at apple.com>
  Date:   2024-02-15 (Thu, 15 Feb 2024)

  Changed paths:
    M Source/WebCore/Modules/webaudio/AudioContext.cpp
    M Source/WebCore/Modules/webxr/WebXRSystem.cpp
    M Source/WebCore/Modules/webxr/WebXRSystem.h
    M Source/WebCore/html/HTMLMediaElement.cpp
    M Source/WebCore/page/Page.cpp
    M Source/WebCore/page/Page.h
    M Source/WebKit/WebProcess/WebPage/WebPage.cpp

  Log Message:
  -----------
  [WebXR] Allow audio and media sessions to continue uninterrupted when starting immersive WebXR sessions
https://bugs.webkit.org/show_bug.cgi?id=269332
rdar://102391109

Reviewed by Eric Carlson.

The original Safari window gets backgrounded when we start an immersive WebXR
session. We need to allow audio/media to continue playback when we get a
backgrounding notification for this scenario, similar to how we handle this
for picture-in-picture.

* Source/WebCore/Modules/webaudio/AudioContext.cpp:
(WebCore::AudioContext::shouldOverrideBackgroundPlaybackRestriction const):
Return true if the page has an active WebXR immersive session.
* Source/WebCore/Modules/webxr/WebXRSystem.cpp:
(WebCore::WebXRSystem::hasActiveImmersiveSession const):
* Source/WebCore/Modules/webxr/WebXRSystem.h:
* Source/WebCore/html/HTMLMediaElement.cpp:
(WebCore::HTMLMediaElement::shouldOverrideBackgroundPlaybackRestriction const):
Return true if the page has an active WebXR immersive session.
* Source/WebCore/page/Page.cpp:
(WebCore::Page::hasActiveImmersiveSession const):
Walk the frame tree and return true if any frame's window has an active
WebXR immersive session.
* Source/WebCore/page/Page.h:
* Source/WebKit/WebProcess/WebPage/WebPage.cpp:
(WebKit::WebPage::updateDrawingAreaLayerTreeFreezeState):
Similar to picture-in-picture, skip freezing the layer tree state if
the window gets backgrounded due to an active immersive session.

Canonical link: https://commits.webkit.org/274742@main