[Webkit-unassigned] [Bug 52174] New: Control-click on Mac should trigger a mouse event with event.button == 2

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=52174

           Summary: Control-click on Mac should trigger a mouse event with
                    event.button == 2
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh
        OS/Version: Mac OS X 10.5
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: nicksantos at google.com
                CC: ojan at chromium.org, arv at chromium.org


Description: On Mac, control-click brings up a contextmenu, but webkit fires a mouse event with button == 0.

Repro steps:
1) Execute the following JS on any page.
document.body.addEventListener('mousedown', function(e) { alert(e.button); }, false);
2) Ctrl-click on the page.

Expected behavior:
alert(2);
like on Gecko, or when doing 2-finger clicks on certain Mac touchpads

Actual behavior:
alert(0);

For what it's worth, here's the relevant spec:
http://dev.w3.org/2006/webapi/DOM-Level-3-Events/html/DOM3-Events.html#event-type-click
which is ambiguous, but seems to slightly tilt in favor of the gecko behavior.

Also, because two-finger click on touchpads have event.button == 2, it seems like the ctrl-click behavior should be consistent.

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