[Webkit-unassigned] [Bug 110415] New: Provide WKView SPI to defer telling the WebPage and WebProcess about changes in the hosting window

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=110415

           Summary: Provide WKView SPI to defer telling the WebPage and
                    WebProcess about changes in the hosting window
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Keywords: InRadar
          Severity: Normal
          Priority: P2
         Component: WebKit2
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: timothy_horton at apple.com
                CC: andersca at apple.com, sam at webkit.org,
                    simon.fraser at apple.com


Sometimes, we want to move a WKView around in the hierarchy.

Right now, if you remove a WKView and readd it elsewhere, you're likely to see a flash of white due to the asynchronous nature of the messages to the WebProcess (when a WebProcess is moved out-of-window, the TileCache unparents its tiles, among other things).

We should provide a way to say "hang on a second, I might re-add you to the same window in a bit".

I want to do this by simply providing a begin/end pair on WKView that - if you're inside a pair - we don't send WebPageProxy a viewStateDidChange with the ViewIsInWindow flag until you leave the last pair.

<rdar://problem/13095405>

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