First commit.

Signed-off-by: Chen Xiao <abigwc@gmail.com>

client/node_modules/dagre-d3-es/src/dagre/position/index.js

@@ -0,0 +1,31 @@
+import * as _ from 'lodash-es';
+import * as util from '../util.js';
+import { positionX } from './bk.js';
+
+export { position };
+
+function position(g) {
+  g = util.asNonCompoundGraph(g);
+
+  positionY(g);
+  _.forOwn(positionX(g), function (x, v) {
+    g.node(v).x = x;
+  });
+}
+
+function positionY(g) {
+  var layering = util.buildLayerMatrix(g);
+  var rankSep = g.graph().ranksep;
+  var prevY = 0;
+  _.forEach(layering, function (layer) {
+    var maxHeight = _.max(
+      _.map(layer, function (v) {
+        return g.node(v).height;
+      }),
+    );
+    _.forEach(layer, function (v) {
+      g.node(v).y = prevY + maxHeight / 2;
+    });
+    prevY += maxHeight + rankSep;
+  });
+}