From e2d71d11de9282521e931d832a92154acd341ef0 Mon Sep 17 00:00:00 2001
From: "Justin M. Keyes" <justinkz@gmail.com>
Date: Wed, 2 Jan 2019 23:18:31 +0100
Subject: [PATCH] remove check_visual_highlight()

This check is meaningless, we assume the terminal supports reverse-mode.
---
 src/nvim/mouse.c  |  1 -
 src/nvim/normal.c | 18 ------------------
 src/nvim/screen.c |  3 +--
 3 files changed, 1 insertion(+), 21 deletions(-)

diff --git a/src/nvim/mouse.c b/src/nvim/mouse.c
index 3790886194..bf71e6a479 100644
--- a/src/nvim/mouse.c
+++ b/src/nvim/mouse.c
@@ -319,7 +319,6 @@ retnomove:
 
   // Start Visual mode before coladvance(), for when 'sel' != "old"
   if ((flags & MOUSE_MAY_VIS) && !VIsual_active) {
-    check_visual_highlight();
     VIsual = old_cursor;
     VIsual_active = true;
     VIsual_reselect = true;
diff --git a/src/nvim/normal.c b/src/nvim/normal.c
index a050c95224..8733c6db62 100644
--- a/src/nvim/normal.c
+++ b/src/nvim/normal.c
@@ -2764,7 +2764,6 @@ do_mouse (
       if (VIsual_active)
         orig_cursor = VIsual;
       else {
-        check_visual_highlight();
         VIsual = curwin->w_cursor;
         orig_cursor = VIsual;
         VIsual_active = true;
@@ -2934,22 +2933,6 @@ static int get_mouse_class(char_u *p)
   return c;
 }
 
-/*
- * Check if  highlighting for visual mode is possible, give a warning message
- * if not.
- */
-void check_visual_highlight(void)
-{
-  static bool did_check = false;
-
-  if (full_screen) {
-    if (!did_check && HL_ATTR(HLF_V) == 0) {
-      MSG(_("Warning: terminal cannot highlight"));
-    }
-    did_check = true;
-  }
-}
-
 /*
  * End Visual mode.
  * This function should ALWAYS be called to end Visual mode, except from
@@ -6420,7 +6403,6 @@ static void nv_visual(cmdarg_T *cap)
     }
     redraw_curbuf_later(INVERTED);          /* update the inversion */
   } else {                /* start Visual mode */
-    check_visual_highlight();
     if (cap->count0 > 0 && resel_VIsual_mode != NUL) {
       /* use previously selected part */
       VIsual = curwin->w_cursor;
diff --git a/src/nvim/screen.c b/src/nvim/screen.c
index 1e07bbb5e3..07695031d8 100644
--- a/src/nvim/screen.c
+++ b/src/nvim/screen.c
@@ -678,8 +678,7 @@ static void win_update(win_T *wp)
   static int recursive = FALSE;         /* being called recursively */
   int old_botline = wp->w_botline;
   long fold_count;
-  /* remember what happened to the previous line, to know if
-   * check_visual_highlight() can be used */
+  // Remember what happened to the previous line.
 #define DID_NONE 1      /* didn't update a line */
 #define DID_LINE 2      /* updated a normal line */
 #define DID_FOLD 3      /* updated a folded line */