From c0e17dd324f016401d56d66b7c113dada0644155 Mon Sep 17 00:00:00 2001
From: Blaž Hrastnik
Date: Fri, 23 Oct 2020 11:32:25 +0900
Subject: Fix undo/redo not updating the syntax tree.

---
 helix-view/src/commands.rs | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

(limited to 'helix-view/src/commands.rs')

diff --git a/helix-view/src/commands.rs b/helix-view/src/commands.rs
index b5350ff4..6bf89040 100644
--- a/helix-view/src/commands.rs
+++ b/helix-view/src/commands.rs
@@ -509,13 +509,17 @@ pub fn insert_char_prompt(prompt: &mut Prompt, c: char) {
 // Undo / Redo
 
 pub fn undo(view: &mut View, _count: usize) {
-    view.doc.history.undo(&mut view.doc.state);
+    if let Some(revert) = view.doc.history.undo() {
+        view.doc.apply(&revert);
+    }
 
     // TODO: each command could simply return a Option<transaction>, then the higher level handles storing it?
 }
 
 pub fn redo(view: &mut View, _count: usize) {
-    view.doc.history.redo(&mut view.doc.state);
+    if let Some(transaction) = view.doc.history.redo() {
+        view.doc.apply(&transaction);
+    }
 }
 
 // Yank / Paste
-- 
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