feat(ui): add type filter toggles

node_modules/dagre/lib/rank/index.js

@@ -0,0 +1,48 @@
+"use strict";
+
+var rankUtil = require("./util");
+var longestPath = rankUtil.longestPath;
+var feasibleTree = require("./feasible-tree");
+var networkSimplex = require("./network-simplex");
+
+module.exports = rank;
+
+/*
+ * Assigns a rank to each node in the input graph that respects the "minlen"
+ * constraint specified on edges between nodes.
+ *
+ * This basic structure is derived from Gansner, et al., "A Technique for
+ * Drawing Directed Graphs."
+ *
+ * Pre-conditions:
+ *
+ *    1. Graph must be a connected DAG
+ *    2. Graph nodes must be objects
+ *    3. Graph edges must have "weight" and "minlen" attributes
+ *
+ * Post-conditions:
+ *
+ *    1. Graph nodes will have a "rank" attribute based on the results of the
+ *       algorithm. Ranks can start at any index (including negative), we'll
+ *       fix them up later.
+ */
+function rank(g) {
+  switch(g.graph().ranker) {
+  case "network-simplex": networkSimplexRanker(g); break;
+  case "tight-tree": tightTreeRanker(g); break;
+  case "longest-path": longestPathRanker(g); break;
+  default: networkSimplexRanker(g);
+  }
+}
+
+// A fast and simple ranker, but results are far from optimal.
+var longestPathRanker = longestPath;
+
+function tightTreeRanker(g) {
+  longestPath(g);
+  feasibleTree(g);
+}
+
+function networkSimplexRanker(g) {
+  networkSimplex(g);
+}