[Webkit-unassigned] [Bug 24813] New: Continuous scroll devices shouldn't use an SPI on Mac

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=24813

           Summary: Continuous scroll devices shouldn't use an SPI on Mac
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh
        OS/Version: Mac OS X 10.5
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Platform
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: avi at drissman.com


Currently, to support a continuous scroll device, WheelEventMac uses an SPI
(wkGetWheelEventDeltas) (see
http://trac.webkit.org/browser/trunk/WebCore/platform/mac/WheelEventMac.mm).
This isn't necessary anymore in Leopard.

In Chromium, we're using CGEvents to get the data we need. See
http://src.chromium.org/viewvc/chrome/trunk/src/webkit/glue/webinputevent_mac.mm
.

WebKit should switch for two reasons:

- The use of SPIs is bad and should be reduced
- The measurement of scrolling units should agree across WebKit browsers. For
example, the DOM scroll event should have non-accelerated ticks. We have that
in Chromium. Does WebKit? It's hard to say as the SPI isn't documented.


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