patch 8.2.4614: redrawing too much when 'cursorline' is setv8.2.4614

Problem:    Redrawing too much when 'cursorline' is set and jumping around.
Solution:   Rely on win_update() to redraw the current and previous cursor
            line, do not mark lines as modified. (closes #9996)

1 files changed, 2 insertions, 26 deletions

diff --git a/src/move.c b/src/move.c
index 1c88e6ebc..571ec8c31 100644
--- a/src/move.c
+++ b/src/move.c
@@ -115,14 +115,6 @@ comp_botline(win_T *wp)
     set_empty_rows(wp, done);
 }
 
-#ifdef FEAT_SYN_HL
-    void
-reset_cursorline(void)
-{
-    curwin->w_last_cursorline = 0;
-}
-#endif
-
 /*
  * Redraw when w_cline_row changes and 'relativenumber' or 'cursorline' is
  * set.
@@ -138,24 +130,8 @@ redraw_for_cursorline(win_T *wp)
 	    && (wp->w_valid & VALID_CROW) == 0
 	    && !pum_visible())
     {
-	if (wp->w_p_rnu)
-	    // win_line() will redraw the number column only.
-	    redraw_win_later(wp, VALID);
-#ifdef FEAT_SYN_HL
-	if (wp->w_p_cul)
-	{
-	    if (wp->w_redr_type <= VALID && wp->w_last_cursorline != 0)
-	    {
-		// "w_last_cursorline" may be outdated, worst case we redraw
-		// too much.  This is optimized for moving the cursor around in
-		// the current window.
-		redrawWinline(wp, wp->w_last_cursorline);
-		redrawWinline(wp, wp->w_cursor.lnum);
-	    }
-	    else
-		redraw_win_later(wp, SOME_VALID);
-	}
-#endif
+	// win_line() will redraw the number column and cursorline only.
+	redraw_win_later(wp, VALID);
     }
 }