grav-ouidade.com/user/themes/ouidade/bower_components/isotope/js/layout-modes/vertical.js

/**
 * vertical layout mode
 */

( function( window, factory ) {
  // universal module definition
  /* jshint strict: false */ /*globals define, module, require */
  if ( typeof define == 'function' && define.amd ) {
    // AMD
    define( [
        '../layout-mode'
      ],
      factory );
  } else if ( typeof module == 'object' && module.exports ) {
    // CommonJS
    module.exports = factory(
      require('../layout-mode')
    );
  } else {
    // browser global
    factory(
      window.Isotope.LayoutMode
    );
  }

}( window, function factory( LayoutMode ) {
'use strict';

var Vertical = LayoutMode.create( 'vertical', {
  horizontalAlignment: 0
});

var proto = Vertical.prototype;

proto._resetLayout = function() {
  this.y = 0;
};

proto._getItemLayoutPosition = function( item ) {
  item.getSize();
  var x = ( this.isotope.size.innerWidth - item.size.outerWidth ) *
    this.options.horizontalAlignment;
  var y = this.y;
  this.y += item.size.outerHeight;
  return { x: x, y: y };
};

proto._getContainerSize = function() {
  return { height: this.y };
};

return Vertical;

}));