[Webkit-unassigned] [Bug 252003] New: [GPU Process] [FormControls] Make it possible to draw a viewless NSCell

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=252003

            Bug ID: 252003
           Summary: [GPU Process] [FormControls] Make it possible to draw
                    a viewless NSCell
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sabouhallawa at apple.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

AppKit crashes if [NSCell drawWithFrame] is called out of the main thread with a non-nil NSView. And this is why a hack was added to WebControlWindow to silence this crash in 257981 at main. To fix the crash and to remove the hack, a nil NSView will be passed to [NSCell drawWithFrame] instead of passing the fake one. 

To provide the [NSCell drawWithFrame] with the settings that it used to get from the fake NSView, new AppKit SPIs will be used to explicitly set them from the drawing. An NSCell can be drawn without an NSView only if these SPIs are available.

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