apply-transform-position.js

Item.prototype._applyTransformPosition = function() {
  // get possible translate position
  if ( !transformProperty ) {
    return;
  }
  var style = getStyle( this.element );
  var transform = style[ transformProperty ];

  if ( transform.indexOf('matrix') !== 0 ) {
    return;
  }
  // split matrix(1, 0, 0, 1, x, y)
  var matrixValues = transform.split(',');
  // translate X value is in 12th or 4th position
  var xIndex = transform.indexOf('matrix3d') === 0 ? 12 : 4;
  this.position.x += parseInt( matrixValues[ xIndex ], 10 );
  // translate X value is in 13th or 5th position
  this.position.y += parseInt( matrixValues[ xIndex + 1 ], 10 );
};