Commit: patch 9.2.0190: Status line height mismatch in vertical splits

[Christian Brabandt]

patch 9.2.0190: Status line height mismatch in vertical splits

Commit: https://github.com/vim/vim/commit/1f4cd5fb52c5f07b2e6bc329f9a5f743e648c7b3
Author: Hirohito Higashi <h.eas...@gmail.com>
Date: Tue Mar 17 21:00:45 2026 +0000

patch 9.2.0190: Status line height mismatch in vertical splits

Problem: When 'laststatus' changes, the status line can become
misaligned.
Solution: Update last_status_rec() to calculate the maximum status line
height required across all windows in a vertical row.

closes: #19688

Co-Authored-By: Claude Sonnet 4.6 <nor...@anthropic.com>
Signed-off-by: Hirohito Higashi <h.eas...@gmail.com>
Signed-off-by: Christian Brabandt <c...@256bit.org>

diff --git a/src/testdir/dumps/Test_laststatus_vsplit_row_height2_1.dump b/src/testdir/dumps/Test_laststatus_vsplit_row_height2_1.dump
new file mode 100644
index 000000000..12701b1ec
--- /dev/null
+++ b/src/testdir/dumps/Test_laststatus_vsplit_row_height2_1.dump
@@ -0,0 +1,8 @@
+> +0&#ffffff0@74
+|~+0#4040ff13&| @73
+|~| @73
+|[+3#0000000&|N|o| |N|a|m|e|]| @47|0|,|0|-|1| @9|A|l@1
+| +0&&@36||+1&&| +0&&@36
+|[+1&&|N|o| |N|a|m|e|]| @9|0|,|0|-|1| @9|A|l@1| |~+0#4040ff13&| @35
+| +1#0000000&@37|[|N|o| |N|a|m|e|]| @9|0|,|0|-|1| @9|A|l@1
+| +0&&@74
diff --git a/src/testdir/dumps/Test_laststatus_vsplit_row_height3_1.dump b/src/testdir/dumps/Test_laststatus_vsplit_row_height3_1.dump
new file mode 100644
index 000000000..6d24637e3
--- /dev/null
+++ b/src/testdir/dumps/Test_laststatus_vsplit_row_height3_1.dump
@@ -0,0 +1,8 @@
+> +0&#ffffff0@74
+|~+0#4040ff13&| @73
+|~| @73
+|[+3#0000000&|N|o| |N|a|m|e|]| @47|0|,|0|-|1| @9|A|l@1
+| +0&&@36||+1&&| +0&&@36
+|~+0#4040ff13&| @35||+1#0000000&|[|N|o| |N|a|m|e|]| @9|0|,|0|-|1| @9|A|l@1
+|[|N|o| |N|a|m|e|]| @9|0|,|0|-|1| @9|A|l@1| @37
+| +0&&@74
diff --git a/src/testdir/dumps/Test_laststatus_vsplit_row_height_1.dump b/src/testdir/dumps/Test_laststatus_vsplit_row_height_1.dump
new file mode 100644
index 000000000..86db528f7
--- /dev/null
+++ b/src/testdir/dumps/Test_laststatus_vsplit_row_height_1.dump
@@ -0,0 +1,8 @@
+> +0&#ffffff0@74
+|~+0#4040ff13&| @73
+|~| @73
+|~| @73
+|[+3#0000000&|N|o| |N|a|m|e|]| @47|0|,|0|-|1| @9|A|l@1
+| +0&&@36||+1&&| +0&&@36
+|[+1&&|N|o| |N|a|m|e|]| @9|0|,|0|-|1| @9|A|l@1| |[|N|o| |N|a|m|e|]| @9|0|,|0|-|1| @9|A|l@1
+| +0&&@74
diff --git a/src/testdir/test_window_cmd.vim b/src/testdir/test_window_cmd.vim
index 1832a9790..6ead70a1a 100644
--- a/src/testdir/test_window_cmd.vim
+++ b/src/testdir/test_window_cmd.vim
@@ -2377,8 +2377,9 @@ endfunc
" When shrinking a window and the only other window has 'winfixheight'
" with 'winminheight'=0, freed rows must go to the wfh window.
func Test_winfixheight_resize_wmh_zero()
- set winminheight=0 laststatus=0
+ CheckFeature quickfix

+ set winminheight=0 laststatus=0
let id1 = win_getid()
copen
let id2 = win_getid()
@@ -2438,4 +2439,61 @@ func Test_winfixheight_resize_wmh_zero()
set winminheight& laststatus&
endfunc

+" Test that setting 'laststatus' from 0 to 2 gives all windows in a vertical
+" split (FR_ROW) the same height and correct status line position.
+func Test_laststatus_vsplit_row_height()
+ CheckScreendump
+
+ let lines =<< trim END
+ set ls=0
+ vsplit
+ topleft new
+ wincmd _
+ set ls=2
+ END
+ call writefile(lines, 'XTestLaststatusVsplitRowHeight', 'D')
+ let buf = RunVimInTerminal('-S XTestLaststatusVsplitRowHeight', #{rows: 8})
+ call VerifyScreenDump(buf, 'Test_laststatus_vsplit_row_height_1', {})
+ call StopVimInTerminal(buf)
+endfunc
+
+" Test that when FR_ROW windows have different status line heights (due to
+" window-local 'statuslineopt'), content heights compensate so that total
+" rows are equal across the row.
+func Test_laststatus_vsplit_row_height_mixed_stlo()
+ CheckScreendump
+
+ let lines =<< trim END
+ set ls=0
+ setlocal stlo=fixedheight,maxheight:2
+ rightbelow vnew
+ topleft new
+ wincmd _
+ set ls=2
+ END
+ call writefile(lines, 'XTestLaststatusVsplitRowHeight2', 'D')
+ let buf = RunVimInTerminal('-S XTestLaststatusVsplitRowHeight2', #{rows: 8})
+ call VerifyScreenDump(buf, 'Test_laststatus_vsplit_row_height2_1', {})
+ call StopVimInTerminal(buf)
+endfunc
+
+" Same as above but with the stlo window on the right (second leaf in FR_ROW).
+func Test_laststatus_vsplit_row_height_mixed_stlo_reversed()
+ CheckScreendump
+
+ let lines =<< trim END
+ set ls=0
+ leftabove vnew
+ wincmd p
+ setlocal stlo=fixedheight,maxheight:2
+ topleft new
+ wincmd _
+ set ls=2
+ END
+ call writefile(lines, 'XTestLaststatusVsplitRowHeight3', 'D')
+ let buf = RunVimInTerminal('-S XTestLaststatusVsplitRowHeight3', #{rows: 8})
+ call VerifyScreenDump(buf, 'Test_laststatus_vsplit_row_height3_1', {})
+ call StopVimInTerminal(buf)
+endfunc
+
" vim: shiftwidth=2 sts=2 expandtab
diff --git a/src/version.c b/src/version.c
index d7c480a67..c480833be 100644
--- a/src/version.c
+++ b/src/version.c
@@ -734,6 +734,8 @@ static char *(features[]) =

static int included_patches[] =
{ /* Add new patch number below this line */
+/**/
+ 190,
/**/
189,
/**/
diff --git a/src/window.c b/src/window.c
index 4b6626cc3..390c084fa 100644
--- a/src/window.c
+++ b/src/window.c
@@ -7654,8 +7654,78 @@ last_status_rec(frame_T *fr, int statusline)
else if (fr->fr_layout == FR_ROW)
{
// vertically split windows, set status line for each one
- FOR_ALL_FRAMES(fp, fr->fr_child)
- last_status_rec(fp, statusline);
+ if (!statusline)
+ {
+ FOR_ALL_FRAMES(fp, fr->fr_child)
+ last_status_rec(fp, statusline);
+ }
+ else
+ {
+ frame_T *fp2;
+ int max_stlh = 0;
+ int new_row_height;
+
+ // Find the max status height needed across all leaf windows.
+ FOR_ALL_FRAMES(fp, fr->fr_child)
+ if (fp->fr_win != NULL && fp->fr_win->w_status_height == 0)
+ {
+ int h = statusline_height(fp->fr_win);
+ if (h > max_stlh)
+ max_stlh = h;
+ }
+ if (max_stlh == 0)
+ return;
+
+ // Find a frame to take max_stlh lines from.
+ fp2 = fr;
+ while (fp2->fr_height - frame_minheight(fp2, NULL) < max_stlh)
+ {
+ if (fp2 == topframe)
+ {
+ emsg(_(e_not_enough_room));
+ return;
+ }
+ if (fp2->fr_parent->fr_layout == FR_COL
+ && fp2->fr_prev != NULL)
+ fp2 = fp2->fr_prev;
+ else
+ fp2 = fp2->fr_parent;
+ }
+
+ if (fp2 != fr)
+ {
+ frame_new_height(fp2, fp2->fr_height - max_stlh,
+ FALSE, FALSE, FALSE);
+ new_row_height = fr->fr_height + max_stlh;
+ }
+ else
+ new_row_height = fr->fr_height;
+
+ // Set status and content heights for all leaves.
+ FOR_ALL_FRAMES(fp, fr->fr_child)
+ {
+ if (fp->fr_win != NULL)
+ {
+ wp = fp->fr_win;
+ if (wp->w_status_height == 0)
+ {
+ wp->w_status_height = statusline_height(wp);
+ win_new_height(wp,
+ new_row_height - wp->w_status_height);
+ frame_fix_height(wp);
+ comp_col();
+ redraw_all_later(UPD_SOME_VALID);
+ if (abs(wp->w_height - wp->w_prev_height) == 1)
+ wp->w_prev_height = wp->w_height;
+ }
+ }
+ else
+ last_status_rec(fp, statusline); // nested frames
+ }
+
+ fr->fr_height = new_row_height;
+ win_comp_pos();
+ }
}
else
{