From e4a2b7f7a9a8e5f05d1f06f70e252adea149813e Mon Sep 17 00:00:00 2001
From: Guillaume Chereau <guillaume@noctua-software.com>
Date: Sun, 7 Jul 2024 15:52:20 +0800
Subject: [PATCH] Don't push to undo history when no change

This can happen for example if we just moved the selection box.
---
 src/image.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/image.c b/src/image.c
index 0136a6b68..dfd5d8123 100644
--- a/src/image.c
+++ b/src/image.c
@@ -616,6 +616,13 @@ void image_history_push(image_t *img)
 {
     image_t *snap;
 
+    // Don't do anything if the image didn't actually changed.
+    if (img->history_pos) {
+        if (image_get_key(img) == image_get_key(img->history_pos)) {
+            return;
+        }
+    }
+
     // Discard previous undo.
     if (img->history_pos) {
         while (img->history_pos->history_next) {