[Webkit-unassigned] [Bug 21199] New: REGRESSION: Viewless scrollbars don't properly recognize some mouse exited/entered situations during a scroll on Mac

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=21199

           Summary: REGRESSION: Viewless scrollbars don't properly recognize
                    some mouse exited/entered situations during a scroll on
                    Mac
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh
               URL: data:text/html,<div style="width: 125px; height: 125px;
                    overflow: auto;">WebKit is an open source web browser
                    engine. WebKit is also the name of the Mac OS X system
                    framework version of the engine that's used by Safari,
                    Dashboard, Mail, and many other OS X applications.</div>
        OS/Version: Mac OS X 10.5
            Status: NEW
          Keywords: HasReduction, Regression, PlatformOnly
          Severity: Normal
          Priority: P1
         Component: WebCore Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: webkit at mattlilek.com
                CC: hyatt at apple.com


On the new viewless scrollbars on OS X, the scroll arrow behavior doesn't
properly recognize mouse exited/entered situations during a scroll.

1) Load the testcase in the URL
2) Click the down arrow, before it reaches the bottom, move your mouse off into
the body of the page. Note how the scroll stops, but the arrow stays
highlighted.
3) Move the mouse back onto the down arrow and then move it back up to the up
arrow (assuming you have the double-arrow scrollbar configuration) - the scroll
should reverse direction, but instead doesn't.


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