d3.svg.mouse = function(container) {

  return d3_svg_mousePoint(container, d3.event);

};

// https://bugs.webkit.org/show_bug.cgi?id=44083

var d3_mouse_bug44083 = /WebKit/.test(navigator.userAgent) ? -1 : 0;

function d3_svg_mousePoint(container, e) {

  var point = (container.ownerSVGElement || container).createSVGPoint();

  if ((d3_mouse_bug44083 < 0) && (window.scrollX || window.scrollY)) {

    var svg = d3.select(document.body)

      .append("svg:svg")

        .style("position", "absolute")

        .style("top", 0)

        .style("left", 0);

    var ctm = svg[0][0].getScreenCTM();

    d3_mouse_bug44083 = !(ctm.f || ctm.e);

    svg.remove();

  }

  if (d3_mouse_bug44083) {

    point.x = e.pageX;

    point.y = e.pageY;

  } else {

    point.x = e.clientX;

    point.y = e.clientY;

  }

  point = point.matrixTransform(container.getScreenCTM().inverse());

  return [point.x, point.y];

};