From 0697c24601e5d236bc17ca2d0c6b4cb9aaf2dd46 Mon Sep 17 00:00:00 2001
From: zeertzjq <zeertzjq@outlook.com>
Date: Wed, 29 Apr 2026 13:42:02 +0800
Subject: [PATCH] vim-patch:9.2.0413: Scrolling wrong with 'splitkeep' when
 changing 'cmdheight' (#39493)

Problem:  Cursor is not adjusted when 'cmdheight' is changed to cover
          the cursor with 'splitkeep' ~= "cursor".
Solution: Handle window resize for 'splitkeep' after changing 'cmdheight'.
          Ensure previous window height is set when changing 'splitkeep'
          (Luuk van Baal).

closes: vim/vim#20043

https://github.com/vim/vim/commit/bd0f3e6da5df70ab2250264d0a7efc7db83c3dc8

Co-authored-by: Luuk van Baal <luukvbaal@gmail.com>
---
 src/nvim/options.lua                 |  1 +
 src/nvim/optionstr.c                 |  8 ++++++++
 src/nvim/window.c                    |  1 +
 test/old/testdir/test_window_cmd.vim | 10 ++++++++++
 4 files changed, 20 insertions(+)

diff --git a/src/nvim/options.lua b/src/nvim/options.lua
index 29115b5716..2651584a36 100644
--- a/src/nvim/options.lua
+++ b/src/nvim/options.lua
@@ -8633,6 +8633,7 @@ local options = {
     },
     {
       abbreviation = 'spk',
+      cb = 'did_set_splitkeep',
       defaults = 'cursor',
       values = { 'cursor', 'screen', 'topline' },
       desc = [=[
diff --git a/src/nvim/optionstr.c b/src/nvim/optionstr.c
index 274fbb653c..74301ecab2 100644
--- a/src/nvim/optionstr.c
+++ b/src/nvim/optionstr.c
@@ -1831,6 +1831,14 @@ const char *did_set_spellsuggest(optset_T *args FUNC_ATTR_UNUSED)
   return NULL;
 }
 
+const char *did_set_splitkeep(optset_T *args FUNC_ATTR_UNUSED)
+{
+  FOR_ALL_TAB_WINDOWS(tp, wp) {
+    wp->w_prev_height = wp->w_height;
+  }
+  return did_set_str_generic(args);
+}
+
 /// The 'statuscolumn' option is changed.
 const char *did_set_statuscolumn(optset_T *args)
 {
diff --git a/src/nvim/window.c b/src/nvim/window.c
index 40f471a9fb..7877dde592 100644
--- a/src/nvim/window.c
+++ b/src/nvim/window.c
@@ -7139,6 +7139,7 @@ void command_height(void)
   if (p_ch < old_p_ch && command_frame_height && frp != NULL) {
     frame_add_height(frp, (int)(old_p_ch - p_ch));
   }
+  win_fix_scroll(true);
 
   // Recompute window positions.
   win_comp_pos();
diff --git a/test/old/testdir/test_window_cmd.vim b/test/old/testdir/test_window_cmd.vim
index 8d77d3851f..4f4aec4ffb 100644
--- a/test/old/testdir/test_window_cmd.vim
+++ b/test/old/testdir/test_window_cmd.vim
@@ -1944,6 +1944,16 @@ func Test_splitkeep_screen_cursor_pos()
   set splitkeep&
 endfunc
 
+func Test_splitkeep_cmdheight()
+  set splitkeep=screen
+  call setline(1, range(&lines))
+  norm! G
+  set cmdheight=2
+  call assert_equal(&lines - 1, line('.'))
+  %bwipeout!
+  set splitkeep& cmdheight&
+endfunc
+
 func Test_splitkeep_cursor()
   CheckScreendump
   let lines =<< trim END