dagre-d3-es/src/dagre-js/position-clusters.js

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import * as d3 from 'd3';
import * as util from './util.js';

export { positionClusters };

function positionClusters(selection, g) {
  var created = selection.filter(function () {
    return !d3.select(this).classed('update');
  });

  function translate(v) {
    var node = g.node(v);
    return 'translate(' + node.x + ',' + node.y + ')';
  }

  created.attr('transform', translate);

  util.applyTransition(selection, g).style('opacity', 1).attr('transform', translate);

  util
    .applyTransition(created.selectAll('rect'), g)
    .attr('width', function (v) {
      return g.node(v).width;
    })
    .attr('height', function (v) {
      return g.node(v).height;
    })
    .attr('x', function (v) {
      var node = g.node(v);
      return -node.width / 2;
    })
    .attr('y', function (v) {
      var node = g.node(v);
      return -node.height / 2;
    });
}