[Bf-blender-cvs] [7e3b1e2c8f9] master: Fix flipped order of items in the "Undo History" menu

[Campbell Barton]

Commit: 7e3b1e2c8f9f5d95692d37707506d790c5b503f7
Author: Campbell Barton
Date:   Wed Jan 19 13:20:35 2022 +1100
Branches: master
https://developer.blender.org/rB7e3b1e2c8f9f5d95692d37707506d790c5b503f7

Fix flipped order of items in the "Undo History" menu

Error in 0e1bb232e68ce71f4c3dd331ed6331665238a065.

===================================================================

M	source/blender/editors/space_topbar/space_topbar.c

===================================================================

diff --git a/source/blender/editors/space_topbar/space_topbar.c b/source/blender/editors/space_topbar/space_topbar.c
index 7f0f30624cb..82a0de9b845 100644
--- a/source/blender/editors/space_topbar/space_topbar.c
+++ b/source/blender/editors/space_topbar/space_topbar.c
@@ -243,8 +243,11 @@ static void undo_history_draw_menu(const bContext *C, Menu *menu)
   if (wm->undo_stack == NULL) {
     return;
   }
+
   int undo_step_count = 0;
-  for (UndoStep *us = wm->undo_stack->steps.first; us; us = us->next) {
+  int undo_step_count_all = 0;
+  for (UndoStep *us = wm->undo_stack->steps.last; us; us = us->prev) {
+    undo_step_count_all += 1;
     if (us->skip) {
       continue;
     }
@@ -255,10 +258,12 @@ static void undo_history_draw_menu(const bContext *C, Menu *menu)
   uiLayout *column = NULL;
 
   const int col_size = 20 + (undo_step_count / 12);
-  int i = 0;
 
   undo_step_count = 0;
-  for (UndoStep *us = wm->undo_stack->steps.first; us; us = us->next, i++) {
+
+  /* Reverse the order so the most recent state is first in the menu. */
+  int i = undo_step_count_all - 1;
+  for (UndoStep *us = wm->undo_stack->steps.last; us; us = us->prev, i--) {
     if (us->skip) {
       continue;
     }