[Webkit-unassigned] [Bug 196568] New: On a site using frames (not iframes) scrolling scrolls too much screen area and affects adjacent frames

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=196568

            Bug ID: 196568
           Summary: On a site using frames (not iframes) scrolling scrolls
                    too much screen area and affects adjacent frames
           Product: WebKit
           Version: Other
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKitGTK
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: stevenfosdick at gmail.com
                CC: bugs-noreply at webkitgtk.org

Created attachment 366652

  --> https://bugs.webkit.org/attachment.cgi?id=366652&action=review

Test Case

In an HTML frameset, when the content of one frame is large enough for a scollbar to appear, scrolling that content causes a larger area of the screen than the frame concerned to be scrolled, this overwriting adjacent frames.  I attach some very small example files that demonstrate the problem and some screenshots.  To reproduce unpack test case files into a directory, open frameset.html and scroll the right hand frames with the scrollbar.

This came to light in epihpany, the GNOME web browser, where I initially reported it as https://gitlab.gnome.org/GNOME/epiphany/issues/710

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