Possible fix for #14013

[cvrebert]

A possible fix for #14013.
Demo: http://jsfiddle.net/4pLdD/

CC: @fat for review

[BertrandBordage]

Awesome reactivity @cvrebert!
I tested your fix, and it works as expected!

[fat]

that function has gotten pretty gnarly… do you mind separating the things out a bit… something like this?

Tooltip.prototype.getPosition = function ($element) {
    $element   = $element || this.$element

    var el     = $element[0]
    var isBody = el.tagName == 'BODY'
    var isSvg  = window.SVGElement && el instanceof window.SVGElement

    var elRect    = typeof el.getBoundingClientRect == 'function' ? el.getBoundingClientRect() : null
    var elOffset  = isBody ? { top: 0, left: 0 } : $element.offset()
    var scroll    = isBody ? document.documentElement.scrollTop || document.body.scrollTop : $element.scrollTop()
    var outerDims = isSvg ? null : {
      width:  isBody ? $(window).width()  : $element.outerWidth(),
      height: isBody ? $(window).height() : $element.outerHeight()
    }

    return $.extend({}, elRect, scroll, outerDims, elOffset)
}

[fat]

otherwise lg, feel free to merge