From 2632c8222859ed14e69c8437baed852f170f4f3c Mon Sep 17 00:00:00 2001
From: Ryan Yurkanin <me@ryanyurkan.in>
Date: Wed, 6 Sep 2017 14:51:18 -0400
Subject: [PATCH] Fix hasUndos and hasRedos (#1053)

* tiny fix for hasUndos/hasRedos computed values

* clear redos when saving while redos are on the history stack

* Update history.js
---
 src/models/history.js | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/models/history.js b/src/models/history.js
index 1a1a45c03..3621faa68 100644
--- a/src/models/history.js
+++ b/src/models/history.js
@@ -80,7 +80,7 @@ class History extends new Record(DEFAULTS) {
 
   save(operation, options = {}) {
     let history = this
-    let { undos } = history
+    let { undos, redos } = history
     let { merge, skip } = options
     const prevBatch = undos.peek()
     const prevOperation = prevBatch && prevBatch[prevBatch.length - 1]
@@ -118,7 +118,9 @@ class History extends new Record(DEFAULTS) {
       undos = undos.take(100)
     }
 
-    history = history.set('undos', undos)
+    // Clear the redos and update the history.
+    redos = redos.clear()
+    history = history.set('undos', undos).set('redos', redos)
     return history
   }