[Webkit-unassigned] [Bug 28237] New: Pan Scrolling and Panning don't jump out of frames, while mouse wheel events do

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=28237

           Summary: Pan Scrolling and Panning don't jump out of frames,
                    while mouse wheel events do
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
               URL: http://www.samisite.com/test-csb2nf/id43.htm
        OS/Version: Windows 7
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: bweinstein at apple.com


If your mouse is in a frame that can scroll, and you mousewheel to the bottom
of the frame, the scrolling action will continue to its parent (usually the
document). However, if you are panscrolling, when you scroll to the bottom of
the frame, the scrolling does not continue to scroll the parent, and just stops
the scrolling when it is done scrolling the frame. I am not sure if this is by
design or a bug, but I am filing it here to open up discussion on the proper
behavior.

Fixing this to continue panscrolling/panning to the parent would have 2
benefits:
1) It would make these ways of scrolling more like mousewheel scrolling.
2) It would make scrolling frames and iFrames functionally equivalent to
scrolling divs with overflow.

On the attached URL, go into one of the iFrames with scrollbars, and try
mouse-wheeling and pan-scrolling to reproduce the behavior that is discussed
here.

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