commit c98250377d32007490da46b3334771ba3b2667fe
author Luuk van Baal <luukvbaal@gmail.com> Sun Apr 13 17:45:34 2025 +0200
committer Christian Brabandt <cb@256bit.org> Sun Apr 13 17:45:34 2025 +0200
tree 9e49f40f204f7150c2492a93b437c89fb560dc0d
parent 829eda7d381e5f635169c927103568b335cd599d

patch 9.1.1297: Ctrl-D scrolling can get stuck

Problem:  cursor_correct() calculates a valid cursor position which
	  is later changed by update_topline() and causes Ctrl-D
          scrolling to be stuck (Daniel Steinberg, after v9.1.0258).
Solution: Update the valid cursor position before validating topline
          (Luuk van Baal).

fixes: #17106
closes: #17110

Signed-off-by: Luuk van Baal <luukvbaal@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

src/move.c

diff --git a/src/move.c b/src/move.c
index 5d34947..f4bce40 100644
--- a/src/move.c
+++ b/src/move.c
@@ -3120,6 +3120,7 @@
 			    ~(VALID_WROW|VALID_WCOL|VALID_CHEIGHT|VALID_CROW);
 	}
     }
+    check_cursor_moved(curwin);
     curwin->w_valid |= VALID_TOPLINE;
 }
 

src/testdir/test_normal.vim

diff --git a/src/testdir/test_normal.vim b/src/testdir/test_normal.vim
index 35c290c..aa24bce 100644
--- a/src/testdir/test_normal.vim
+++ b/src/testdir/test_normal.vim
@@ -4326,4 +4326,23 @@
   bwipe!
 endfunc
 
+" Test for Ctrl-D with 'scrolloff' and narrow window does not get stuck.
+func Test_scroll_longline_scrolloff()
+  11new
+  36vsplit
+  set scrolloff=5
+
+  call setline(1, ['']->repeat(5))
+  call setline(6, ['foo'->repeat(20)]->repeat(2))
+  call setline(8, ['bar'->repeat(30)])
+  call setline(9, ['']->repeat(5))
+  exe "normal! \<C-D>"
+  call assert_equal(6, line('w0'))
+  exe "normal! \<C-D>"
+  call assert_equal(7, line('w0'))
+
+  set scrolloff&
+  bwipe!
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab nofoldenable

src/version.c

diff --git a/src/version.c b/src/version.c
index 6f3f241..e95226c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1297,
+/**/
     1296,
 /**/
     1295,