# HG changeset patch
# User Bram Moolenaar <Bram@vim.org>
# Date 1664795703 -7200
# Node ID 70d6345a2976a73629699af94c8be70f147b3843
# Parent  c25742e02de997adc74598cfcafbfe0e159a531f
patch 9.0.0645: CTRL-Y does not stop at line 1

Commit: https://github.com/vim/vim/commit/8df9748edb2ac8bd025e34e06194ac210667c97a
Author: Bram Moolenaar <Bram@vim.org>
Date:   Mon Oct 3 12:11:13 2022 +0100

    patch 9.0.0645: CTRL-Y does not stop at line 1

    Problem:    CTRL-Y does not stop at line 1. (John Marriott)
    Solution:   Stop at line 1 when 'smoothscroll' is not set. (closes https://github.com/vim/vim/issues/11261)

diff --git a/src/move.c b/src/move.c
--- a/src/move.c
+++ b/src/move.c
@@ -1485,11 +1485,14 @@ scrolldown(
 	else
 #endif
 	{
-	    if (curwin->w_topline == 1 && curwin->w_skipcol < width1)
+	    // break when at the very top
+	    if (curwin->w_topline == 1
+			   && (!curwin->w_p_sms || curwin->w_skipcol < width1))
 		break;
 	    if (curwin->w_p_wrap && curwin->w_p_sms
-						  && curwin->w_skipcol >= width1)
+						&& curwin->w_skipcol >= width1)
 	    {
+		// scroll a screen line down
 		if (curwin->w_skipcol >= width1 + width2)
 		    curwin->w_skipcol -= width2;
 		else
@@ -1499,6 +1502,7 @@ scrolldown(
 	    }
 	    else
 	    {
+		// scroll a text line down
 		--curwin->w_topline;
 		curwin->w_skipcol = 0;
 #ifdef FEAT_DIFF
diff --git a/src/testdir/test_scroll_opt.vim b/src/testdir/test_scroll_opt.vim
--- a/src/testdir/test_scroll_opt.vim
+++ b/src/testdir/test_scroll_opt.vim
@@ -37,6 +37,19 @@ func Test_reset_scroll()
   quit!
 endfunc
 
+func Test_CtrlE_CtrlY_stop_at_end()
+  enew
+  call setline(1, ['one', 'two'])
+  set number
+  exe "normal \<C-Y>"
+  call assert_equal(["  1 one   "], ScreenLines(1, 10))
+  exe "normal \<C-E>\<C-E>\<C-E>"
+  call assert_equal(["  2 two   "], ScreenLines(1, 10))
+
+  bwipe!
+  set nonumber
+endfunc
+
 func Test_smoothscroll_CtrlE_CtrlY()
   CheckScreendump
 
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    645,
+/**/
     644,
 /**/
     643,