[Webkit-unassigned] [Bug 131166] New: :-webkit-full-screen fails when ancestor has float (and more css issues)

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=131166

           Summary: :-webkit-full-screen fails when ancestor has float
                    (and more css issues)
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh
        OS/Version: Mac OS X 10.9
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: guymguym at gmail.com


Detected when using <video> inside these bootstrap classes - modal (fixed) > container > row > col-md-X (float).
When switching the video to fullscreen it did not show well and the video itself was actually positioned below the visible area of the screen.

I looked at the css -
https://code.google.com/p/webkit-mirror/source/browse/Source/WebCore/css/fullscreen.css?name=master
and although I didn't fully understand why it uses static positioning (rather than fixed) these rules seemed incomplete.
My workaround was to add these custom css rules that fixed the display (though I'm no expert if it has other side-effects).
It might be worth fixing somehow in the original webcore css.

/* make ancestors show fullscreen and cancel float */
:-webkit-full-screen-ancestor:not(iframe) {
    float: none !important;
    margin: 0 !important;
    padding: 0 !important;
    width: 100% !important;
    height: 100% !important;
}
/* hide fullscreen siblings */
:-webkit-full-screen-ancestor > *:not(:-webkit-full-screen):not(:-webkit-full-screen-ancestor) {
    display: none !important;
}

Thanks,
Guy

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