feat(ui): add type filter toggles

node_modules/dagre/lib/parent-dummy-chains.js

@@ -0,0 +1,86 @@
+var _ = require("./lodash");
+
+module.exports = parentDummyChains;
+
+function parentDummyChains(g) {
+  var postorderNums = postorder(g);
+
+  _.forEach(g.graph().dummyChains, function(v) {
+    var node = g.node(v);
+    var edgeObj = node.edgeObj;
+    var pathData = findPath(g, postorderNums, edgeObj.v, edgeObj.w);
+    var path = pathData.path;
+    var lca = pathData.lca;
+    var pathIdx = 0;
+    var pathV = path[pathIdx];
+    var ascending = true;
+
+    while (v !== edgeObj.w) {
+      node = g.node(v);
+
+      if (ascending) {
+        while ((pathV = path[pathIdx]) !== lca &&
+               g.node(pathV).maxRank < node.rank) {
+          pathIdx++;
+        }
+
+        if (pathV === lca) {
+          ascending = false;
+        }
+      }
+
+      if (!ascending) {
+        while (pathIdx < path.length - 1 &&
+               g.node(pathV = path[pathIdx + 1]).minRank <= node.rank) {
+          pathIdx++;
+        }
+        pathV = path[pathIdx];
+      }
+
+      g.setParent(v, pathV);
+      v = g.successors(v)[0];
+    }
+  });
+}
+
+// Find a path from v to w through the lowest common ancestor (LCA). Return the
+// full path and the LCA.
+function findPath(g, postorderNums, v, w) {
+  var vPath = [];
+  var wPath = [];
+  var low = Math.min(postorderNums[v].low, postorderNums[w].low);
+  var lim = Math.max(postorderNums[v].lim, postorderNums[w].lim);
+  var parent;
+  var lca;
+
+  // Traverse up from v to find the LCA
+  parent = v;
+  do {
+    parent = g.parent(parent);
+    vPath.push(parent);
+  } while (parent &&
+           (postorderNums[parent].low > low || lim > postorderNums[parent].lim));
+  lca = parent;
+
+  // Traverse from w to LCA
+  parent = w;
+  while ((parent = g.parent(parent)) !== lca) {
+    wPath.push(parent);
+  }
+
+  return { path: vPath.concat(wPath.reverse()), lca: lca };
+}
+
+function postorder(g) {
+  var result = {};
+  var lim = 0;
+
+  function dfs(v) {
+    var low = lim;
+    _.forEach(g.children(v), dfs);
+    result[v] = { low: low, lim: lim++ };
+  }
+  _.forEach(g.children(), dfs);
+
+  return result;
+}