patch 9.0.0701: with 'smoothscroll' cursor position not adjusted in long linev9.0.0701

Problem:    With 'smoothscroll' the cursor position s not adjusted in a long
            line.
Solution:   Move the cursor further up or down in the line.

8 files changed, 100 insertions, 2 deletions

diff --git a/src/move.c b/src/move.c
index 139ee177ca..613791e3e9 100644
--- a/src/move.c
+++ b/src/move.c
@@ -1602,6 +1602,27 @@ scrolldown(
 #endif
 	coladvance(curwin->w_curswant);
     }
+
+    if (curwin->w_cursor.lnum == curwin->w_topline && do_sms)
+    {
+	// make sure the cursor is in the visible text
+	validate_virtcol();
+	int col = curwin->w_virtcol - curwin->w_skipcol;
+	int row = 0;
+	if (col >= width1)
+	{
+	    col -= width1;
+	    ++row;
+	}
+	if (col > width2)
+	{
+	    row += col / width2;
+	    col = col % width2;
+	}
+	if (row >= curwin->w_height)
+	    coladvance(curwin->w_virtcol
+				      - (row - curwin->w_height + 1) * width2);
+    }
 }
 
 /*
@@ -1651,8 +1672,7 @@ scrollup(
 		    // for a closed fold: go to the last line in the fold
 		    (void)hasFolding(lnum, NULL, &lnum);
 # endif
-		if (lnum == curwin->w_topline
-					&& curwin->w_p_wrap && curwin->w_p_sms)
+		if (lnum == curwin->w_topline && do_sms)
 		{
 		    // 'smoothscroll': increase "w_skipcol" until it goes over
 		    // the end of the line, then advance to the next line.
@@ -1725,6 +1745,24 @@ scrollup(
 	      ~(VALID_WROW|VALID_WCOL|VALID_CHEIGHT|VALID_CROW|VALID_VIRTCOL);
 	coladvance(curwin->w_curswant);
     }
+    if (curwin->w_cursor.lnum == curwin->w_topline
+					    && do_sms && curwin->w_skipcol > 0)
+    {
+	// make sure the cursor is in a visible part of the line
+	validate_virtcol();
+	if (curwin->w_virtcol < curwin->w_skipcol + 3)
+	{
+	    int	    width1 = curwin->w_width - curwin_col_off();
+	    int	    width2 = width1 + curwin_col_off2();
+	    colnr_T col = curwin->w_virtcol;
+
+	    if (col < width1)
+		col += width1;
+	    while (col < curwin->w_skipcol + 3)
+		col += width2;
+	    coladvance(col);
+	}
+    }
 }
 
 #ifdef FEAT_DIFF
diff --git a/src/testdir/dumps/Test_smooth_long_1.dump b/src/testdir/dumps/Test_smooth_long_1.dump
new file mode 100644
index 0000000000..a6f4cfb166
--- /dev/null
+++ b/src/testdir/dumps/Test_smooth_long_1.dump
@@ -0,0 +1,6 @@
+|L+0&#ffffff0|i|n|e| |w|i|t|h> |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t
+| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t
+|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o
+|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o
+|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e
+| @21|3|,|1|0| @9|B|o|t| 
diff --git a/src/testdir/dumps/Test_smooth_long_2.dump b/src/testdir/dumps/Test_smooth_long_2.dump
new file mode 100644
index 0000000000..0c2634f18c
--- /dev/null
+++ b/src/testdir/dumps/Test_smooth_long_2.dump
@@ -0,0 +1,6 @@
+|<+0#4040ff13#ffffff0@2|t+0#0000000&|h| |l|o|t>s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t
+|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o
+|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o
+|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e
+|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w
+| @21|3|,|5|0| @9|B|o|t| 
diff --git a/src/testdir/dumps/Test_smooth_long_3.dump b/src/testdir/dumps/Test_smooth_long_3.dump
new file mode 100644
index 0000000000..c06144c552
--- /dev/null
+++ b/src/testdir/dumps/Test_smooth_long_3.dump
@@ -0,0 +1,6 @@
+|<+0#4040ff13#ffffff0@2| +0#0000000&|l|o|t|s| >o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| 
+|l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s
+| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| 
+|t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t
+| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t
+| @21|3|,|2|5|0| @8|B|o|t| 
diff --git a/src/testdir/dumps/Test_smooth_long_4.dump b/src/testdir/dumps/Test_smooth_long_4.dump
new file mode 100644
index 0000000000..98f2c62563
--- /dev/null
+++ b/src/testdir/dumps/Test_smooth_long_4.dump
@@ -0,0 +1,6 @@
+|<+0#4040ff13#ffffff0@2|t+0#0000000&|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t
+|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o
+|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o
+|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e
+|x|t| |w|i|t|h| |l>o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w
+| @21|3|,|2|1|0| @8|B|o|t| 
diff --git a/src/testdir/dumps/Test_smooth_long_5.dump b/src/testdir/dumps/Test_smooth_long_5.dump
new file mode 100644
index 0000000000..901baca90d
--- /dev/null
+++ b/src/testdir/dumps/Test_smooth_long_5.dump
@@ -0,0 +1,6 @@
+|L+0&#ffffff0|i|n|e| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t
+| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t
+|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o
+|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o
+|f| |t|e|x|t| |w|i>t|h| |l|o|t|s| |o|f| |t|e|x|t| |w|i|t|h| |l|o|t|s| |o|f| |t|e
+| @21|3|,|1|7|0| @8|B|o|t| 
diff --git a/src/testdir/test_scroll_opt.vim b/src/testdir/test_scroll_opt.vim
index 0292fa1f80..c369fa8642 100644
--- a/src/testdir/test_scroll_opt.vim
+++ b/src/testdir/test_scroll_opt.vim
@@ -198,5 +198,33 @@ func Test_smoothscroll_wrap_scrolloff_zero()
   call StopVimInTerminal(buf)
 endfunc
 
+func Test_smoothscroll_wrap_long_line()
+  CheckScreendump
+
+  let lines =<< trim END
+      vim9script
+      setline(1, ['one', 'two', 'Line' .. (' with lots of text'->repeat(30))])
+      set smoothscroll scrolloff=0
+      normal 3G10|zt
+  END
+  call writefile(lines, 'XSmoothWrap', 'D')
+  let buf = RunVimInTerminal('-S XSmoothWrap', #{rows: 6, cols: 40})
+  call VerifyScreenDump(buf, 'Test_smooth_long_1', {})
+
+  " scrolling up, cursor moves screen line down
+  call term_sendkeys(buf, "\<C-E>")
+  call VerifyScreenDump(buf, 'Test_smooth_long_2', {})
+  call term_sendkeys(buf, "5\<C-E>")
+  call VerifyScreenDump(buf, 'Test_smooth_long_3', {})
+
+  " scrolling down, cursor moves screen line up
+  call term_sendkeys(buf, "5\<C-Y>")
+  call VerifyScreenDump(buf, 'Test_smooth_long_4', {})
+  call term_sendkeys(buf, "\<C-Y>")
+  call VerifyScreenDump(buf, 'Test_smooth_long_5', {})
+
+  call StopVimInTerminal(buf)
+endfunc
+
 
 " vim: shiftwidth=2 sts=2 expandtab
diff --git a/src/version.c b/src/version.c
index 453df911f9..79ec146424 100644
--- 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 */
 /**/
+    701,
+/**/
     700,
 /**/
     699,