From 448262176b382c63bd2faa9a1354670a4eede36b Mon Sep 17 00:00:00 2001
From: Bram Moolenaar <Bram@vim.org>
Date: Thu, 22 Aug 2019 21:23:20 +0200
Subject: patch 8.1.1910: redrawing too much when toggling 'relativenumber'

Problem:    Redrawing too much when toggling 'relativenumber'.
Solution:   Only clear when 'signcolumn' is set to "number". (Yegappan
            Lakshmanan, closes #4852)
---
 src/option.c  | 22 ++++++++++++++++++++--
 src/version.c |  2 ++
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/src/option.c b/src/option.c
index b625587db7..6d3a059cca 100644
--- a/src/option.c
+++ b/src/option.c
@@ -1986,7 +1986,7 @@ static struct vimoption options[] =
 			    (char_u *)&p_nf, PV_NF,
 			    {(char_u *)"bin,octal,hex", (char_u *)0L}
 			    SCTX_INIT},
-    {"number",	    "nu",   P_BOOL|P_VI_DEF|P_RCLR,
+    {"number",	    "nu",   P_BOOL|P_VI_DEF|P_RWIN,
 			    (char_u *)VAR_WIN, PV_NU,
 			    {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
     {"numberwidth", "nuw",  P_NUM|P_RWIN|P_VIM,
@@ -2254,7 +2254,7 @@ static struct vimoption options[] =
     {"regexpengine", "re",  P_NUM|P_VI_DEF,
 			    (char_u *)&p_re, PV_NONE,
 			    {(char_u *)0L, (char_u *)0L} SCTX_INIT},
-    {"relativenumber", "rnu", P_BOOL|P_VI_DEF|P_RCLR,
+    {"relativenumber", "rnu", P_BOOL|P_VI_DEF|P_RWIN,
 			    (char_u *)VAR_WIN, PV_RNU,
 			    {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
     {"remap",	    NULL,   P_BOOL|P_VI_DEF,
@@ -9005,6 +9005,24 @@ set_bool_option(
 
 #endif
 
+#if defined(FEAT_SIGNS) && defined(FEAT_GUI)
+    else if (((int *)varp == &curwin->w_p_nu
+		|| (int *)varp == &curwin->w_p_rnu)
+	    && gui.in_use
+	    && (*curwin->w_p_scl == 'n' && *(curwin->w_p_scl + 1) == 'u')
+	    && curbuf->b_signlist != NULL)
+    {
+	// If the 'number' or 'relativenumber' options are modified and
+	// 'signcolumn' is set to 'number', then clear the screen for a full
+	// refresh. Otherwise the sign icons are not displayed properly in the
+	// number column.  If the 'number' option is set and only the
+	// 'relativenumber' option is toggled, then don't refresh the screen
+	// (optimization).
+	if (!(curwin->w_p_nu && ((int *)varp == &curwin->w_p_rnu)))
+	    redraw_all_later(CLEAR);
+    }
+#endif
+
 #ifdef FEAT_TERMGUICOLORS
     /* 'termguicolors' */
     else if ((int *)varp == &p_tgc)
diff --git a/src/version.c b/src/version.c
index 37b0f79786..98f368ca02 100644
--- a/src/version.c
+++ b/src/version.c
@@ -761,6 +761,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1910,
 /**/
     1909,
 /**/
-- 
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