[Webkit-unassigned] [Bug 123094] New: [CSS Regions] calling requestFullscreen() on content flowed in a region makes the whole document full screen

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=123094

           Summary: [CSS Regions] calling requestFullscreen() on content
                    flowed in a region makes the whole document full
                    screen
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: mibalan at adobe.com
                CC: WebkitBugTracker at adobe.com
            Blocks: 57312


Calling webkitRequestFullscreen() on an element flowed in regions will put the entire document in full screen (as if document.webkitRequestFullscreen() was called).
While this specific aspect is not clearly specced, this is counter to what happens when making full-screen an element fragmented through columns and also counter-intuitive.
Also, if the element is fragmented through regions, there are also some layout/rendering artifacts in the form of black margins before and after the element.

Repro
-----

1. Open attached file
2. Click the button

Expected: Page goes full-screen and only the second paragraph with green border is visible

Actual: Page goes full-screen but with all the document being visible. Also, there is a black margin/border before and after the green paragraph.

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