feat(ui): add type filter toggles

node_modules/dagre/lib/normalize.js

@@ -0,0 +1,90 @@
+"use strict";
+
+var _ = require("./lodash");
+var util = require("./util");
+
+module.exports = {
+  run: run,
+  undo: undo
+};
+
+/*
+ * Breaks any long edges in the graph into short segments that span 1 layer
+ * each. This operation is undoable with the denormalize function.
+ *
+ * Pre-conditions:
+ *
+ *    1. The input graph is a DAG.
+ *    2. Each node in the graph has a "rank" property.
+ *
+ * Post-condition:
+ *
+ *    1. All edges in the graph have a length of 1.
+ *    2. Dummy nodes are added where edges have been split into segments.
+ *    3. The graph is augmented with a "dummyChains" attribute which contains
+ *       the first dummy in each chain of dummy nodes produced.
+ */
+function run(g) {
+  g.graph().dummyChains = [];
+  _.forEach(g.edges(), function(edge) { normalizeEdge(g, edge); });
+}
+
+function normalizeEdge(g, e) {
+  var v = e.v;
+  var vRank = g.node(v).rank;
+  var w = e.w;
+  var wRank = g.node(w).rank;
+  var name = e.name;
+  var edgeLabel = g.edge(e);
+  var labelRank = edgeLabel.labelRank;
+
+  if (wRank === vRank + 1) return;
+
+  g.removeEdge(e);
+
+  var dummy, attrs, i;
+  for (i = 0, ++vRank; vRank < wRank; ++i, ++vRank) {
+    edgeLabel.points = [];
+    attrs = {
+      width: 0, height: 0,
+      edgeLabel: edgeLabel, edgeObj: e,
+      rank: vRank
+    };
+    dummy = util.addDummyNode(g, "edge", attrs, "_d");
+    if (vRank === labelRank) {
+      attrs.width = edgeLabel.width;
+      attrs.height = edgeLabel.height;
+      attrs.dummy = "edge-label";
+      attrs.labelpos = edgeLabel.labelpos;
+    }
+    g.setEdge(v, dummy, { weight: edgeLabel.weight }, name);
+    if (i === 0) {
+      g.graph().dummyChains.push(dummy);
+    }
+    v = dummy;
+  }
+
+  g.setEdge(v, w, { weight: edgeLabel.weight }, name);
+}
+
+function undo(g) {
+  _.forEach(g.graph().dummyChains, function(v) {
+    var node = g.node(v);
+    var origLabel = node.edgeLabel;
+    var w;
+    g.setEdge(node.edgeObj, origLabel);
+    while (node.dummy) {
+      w = g.successors(v)[0];
+      g.removeNode(v);
+      origLabel.points.push({ x: node.x, y: node.y });
+      if (node.dummy === "edge-label") {
+        origLabel.x = node.x;
+        origLabel.y = node.y;
+        origLabel.width = node.width;
+        origLabel.height = node.height;
+      }
+      v = w;
+      node = g.node(v);
+    }
+  });
+}