[Webkit-unassigned] [Bug 135268] New: Compute and store snap point positions on Mac

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=135268

           Summary: Compute and store snap point positions on Mac
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh
        OS/Version: Unspecified
            Status: NEW
          Severity: Enhancement
          Priority: P2
         Component: WebCore Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: wenson_hsieh at apple.com


Compute and store the positions (i.e. in LayoutUnit, not Length) for snap points on the Mac. Note that this does not include iOS, since XPC calls are required in order to ship the snap point positions over (that will be the goal for either the next patch or the one after that). This will also introduce ScrollSnapManager, the class which handles nearly all of the snap point logic, including the snapping animations on Mac. For this patch, functions not necessary for just the computation of snap points will be stubbed out, with UNUSED_PARAMs as needed.

There should be no changes in behavior.

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