From 54e1c4f156cced394101f36b3f8b57d69fc53bcf Mon Sep 17 00:00:00 2001
From: ognjenvucko <ognjenvucko@gmail.com>
Date: Thu, 9 Apr 2015 21:44:40 +0200
Subject: [PATCH] Enabled negative values for nodes in Firefox

---
 app.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/app.js b/app.js
index 83c612b..f2c6f85 100644
--- a/app.js
+++ b/app.js
@@ -933,10 +933,12 @@ angular.module('abTreePractice', ['d3', 'Enums', 'Tree'])
               valStr = (nodeVal == null) ? '' : nodeVal.toString();
               if ((lastKeyDown > 47 && lastKeyDown < 58) // number keys
                   || lastKeyDown == 189 // minus dash
+                  || lastKeyDown == 173 // minus dash (Gecko 29)
                   || lastKeyDown == 190) { // decimal point
                 var leftSlice = valStr.slice(0, valCharIndex),
                     rightSlice = valStr.slice(valCharIndex, valStr.length),
-                    lastKeyDown = (lastKeyDown > 188) ? (lastKeyDown - 144) : lastKeyDown,
+                    toSubtract = (173 == lastKeyDown) ? 128 : 144;
+                    lastKeyDown = (lastKeyDown > 172) ? (lastKeyDown - toSubtract) : lastKeyDown,
                     newNum = String.fromCharCode(lastKeyDown);
                 valStr = leftSlice + newNum + rightSlice;
                 selectedNode.value = valStr;