From 213360c389dee96a2ec540d63035724c3cbfc5ac Mon Sep 17 00:00:00 2001
From: Sebastian Lyng Johansen <sebastian@lyngjohansen.com>
Date: Thu, 10 Jul 2025 14:51:13 +0200
Subject: [PATCH] fix(lsp): custom 'winborder' in make_floating_popup_options()
 #34868

---
 runtime/lua/vim/lsp/util.lua | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/runtime/lua/vim/lsp/util.lua b/runtime/lua/vim/lsp/util.lua
index 08a09f500d..d23b4816e0 100644
--- a/runtime/lua/vim/lsp/util.lua
+++ b/runtime/lua/vim/lsp/util.lua
@@ -39,6 +39,11 @@ local function get_border_size(opts)
     border = 'none'
   end
 
+  -- Convert winborder string option with custom characters into a table
+  if type(border) == 'string' and border:find(',') then
+    border = vim.split(border, ',')
+  end
+
   if type(border) == 'string' then
     if not border_size[border] then
       border_error(border)