From a59b8891e8fbfdfd0a6f12fe2112709414793a2a Mon Sep 17 00:00:00 2001
From: brightman9 <31172605+brightman9@users.noreply.github.com>
Date: Sat, 30 Nov 2019 19:51:56 +0800
Subject: [PATCH] getFlatGraph: rewrite recursion to while loop

To avoid call stack overflow when the graph has a large nesting depth
---
 js/anchor.js | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/js/anchor.js b/js/anchor.js
index 0959d34..b96f219 100644
--- a/js/anchor.js
+++ b/js/anchor.js
@@ -139,9 +139,17 @@ Anchor.prototype.updateFlatGraph = function() {
 };
 
 // return Array of self & all child graph items
-Anchor.prototype.getFlatGraph = function() {
-  var flatGraph = [ this ];
-  return this.addChildFlatGraph( flatGraph );
+Anchor.prototype.getFlatGraph = function () {
+  var flatGraph = [this];
+  var index = 0;
+  while (index < flatGraph.length) {
+    var currentGraph = flatGraph[index];
+    currentGraph.children.forEach(function (child) {
+      flatGraph.push(child);
+    });
+    index++;
+  }
+  return flatGraph;
 };
 
 Anchor.prototype.addChildFlatGraph = function( flatGraph ) {