Any way to prevent horizontal scrolling triggering swipe back gesture on OS X Lion Safari?

Question

I am working on a UI that uses horizontal scrolling in a div element (using overflow: scroll). I cannot scroll to the left, because it would start the

Answer 1

Piggy backing off of https://github.com/micho/jQuery.preventMacBackScroll posted by micho I have made this possible in both safari and chrome. Also, I made it work for both left scrolling and right scrolling.

(Sorry that this is in coffeescript. It wouldn't be hard to translate back into javascript)

$(document).on 'ready', ->

# This code is only valid for Mac
if !navigator.userAgent.match(/Macintosh/)
    return

# Detect browsers
# http://stackoverflow.com/questions/5899783/detect-safari-using-jquery
is_chrome = navigator.userAgent.indexOf('Chrome') > -1
is_safari = navigator.userAgent.indexOf("Safari") > -1
is_firefox = navigator.userAgent.indexOf('Firefox') > -1

# Handle scroll events in Chrome, Safari, and Firefox
if is_chrome || is_safari || is_firefox

    $(window).on 'mousewheel', (event) ->
        dX = event.deltaX || event.originalEvent.deltaX
        dY = event.deltaY || event.originalEvent.deltaY

        # If none of the parents can be scrolled right when we try to scroll right
        prevent_right = dX > 0 && $(event.target)
            .parents().addBack()
                .filter ->
                    return this.scrollWidth - this.clientWidth != 0 &&
                     $(this).scrollLeft() < this.scrollWidth - this.clientWidth &&
                     ($(this).css('overflow-y') == 'scroll' || $(this).css('overflow-y') == 'auto')
                .length == 0

        # If none of the parents can be scrolled left when we try to scroll left
        prevent_left = dX < 0 && $(event.target)
            .parents().addBack()
                .filter ->
                    return $(this).scrollLeft() > 0
                .length == 0

        # If none of the parents can be scrolled up when we try to scroll up
        prevent_up = dY > 0 && !$(event.target)
            .parents().addBack()
                .filter ->
                    return $(this).scrollTop() > 0
                .length == 0

        # Prevent minute left and right scroll from messing up vertical scroll
        if (prevent_right || prevent_left) && Math.abs(dY) > 5 && !prevent_up
            return
        # Prevent futile scroll, which would trigger the Back/Next page event
        if prevent_left || prevent_up || prevent_right
            event.preventDefault()