08-27-周三_17-09-29

node_modules/dagre-layout/lib/position/index.js

@@ -0,0 +1,28 @@
+import _ from 'lodash'
+
+import util from '../util'
+import { positionX } from './bk'
+
+function position (g) {
+  g = util.asNonCompoundGraph(g)
+
+  positionY(g)
+  _.forEach(positionX(g), function (x, v) {
+    g.node(v).x = x
+  })
+}
+
+function positionY (g) {
+  const layering = util.buildLayerMatrix(g)
+  const rankSep = g.graph().ranksep
+  let prevY = 0
+  _.forEach(layering, function (layer) {
+    const 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
+  })
+}
+
+export default position