NEW 203443
The m_videoFullscreenMode attribute of HTMLMediaElement does not always store the real presentation mode of the video element 
https://bugs.webkit.org/show_bug.cgi?id=203443
Summary The m_videoFullscreenMode attribute of HTMLMediaElement does not always store...
Peng Liu
Reported 2019-10-25 20:19:23 PDT
Presentation mode change is a multiple-steps process, and the web content process and UI process need to exchange messages multiple times to guarantee the state transition is completed. The implementation of HTMLMediaElement does not consider the asynchronous process to complete the mode change. For example, it sets the m_videoFullscreenMode to be picture-in-picture before the transition from inline to picture-in-picture is completed. In addition, the timing of presentation mode change related callbacks need to be reviewed and changed is necessary.
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Peng Liu
Comment 1 2019-10-25 20:22:15 PDT
I mean: "if necessary".
Radar WebKit Bug Importer
Comment 2 2019-11-14 18:55:08 PST
<rdar://problem/57213972>
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