[Webkit-unassigned] [Bug 190364] New: [macOS] -_webView:didNotHandleWheelEvent: not called for real scroll wheel events, whose phase is NSEventPhaseNone

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=190364

            Bug ID: 190364
           Summary: [macOS] -_webView:didNotHandleWheelEvent: not called
                    for real scroll wheel events, whose phase is
                    NSEventPhaseNone
           Product: WebKit
           Version: Other
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Keywords: NeedsRadar
          Severity: Normal
          Priority: P2
         Component: WebKit2
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mitz at webkit.org

When using a mouse with a scroll wheel or trackball (as opposed to a multitouch device), wheel events all have their phase (and momentum phase) set to NSEventPhaseNone. Even if the web view is pinned and set to not rubber-band, it never delivers such events to the delegate via -_webView:didNotHandleWheelEvent:.

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