oglimmer/ggo

define([], function() {

    return {
        
        lastCursorPos : {
            x : 0,
            y : 0
        },
        
        /**
         * Returns an object { "x":?, "y":? } for a given click event relative to a html element
         */
        getRelativeMousePos : function(evt, htmlElement) {
            var obj = htmlElement;
            var top = 0;
            var left = 0;
            while (obj && obj.tagName != 'BODY') {
                top += obj.offsetTop;
                left += obj.offsetLeft;
                obj = obj.offsetParent;
            }

            this.lastCursorPos.x = evt.clientX - left + window.pageXOffset;
            this.lastCursorPos.y = evt.clientY - top + window.pageYOffset;
            
            return this.lastCursorPos;
        }
        
    };

});