From 4d75c9940c3b4bc0d144bb199839eee2bad084ac Mon Sep 17 00:00:00 2001
From: Christian <cb@256bit.org>
Date: Wed, 18 Nov 2020 08:44:27 +0100
Subject: [PATCH] highlighter: vim9 script implementation of s:get_syn

---
 autoload/airline/highlighter.vim | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/autoload/airline/highlighter.vim b/autoload/airline/highlighter.vim
index 833ba534..5edd950d 100644
--- a/autoload/airline/highlighter.vim
+++ b/autoload/airline/highlighter.vim
@@ -332,4 +332,19 @@ else
       return false
     endif
   enddef
+  def s:get_syn(group: string, what: string, mode: string): string # {{{2
+    var color = ''
+    if hlexists(group)
+      color = hlID(group)->synIDtrans()->synIDattr(what, mode)
+    endif
+    if empty(color) || str2nr(color) == -1
+      # Normal highlighting group should always exist
+      color = hlID('Normal')->synIDtrans()->synIDattr(what, mode)
+      # however, just in case
+      if empty(color) || str2nr(color) == -1
+        color = 'NONE'
+      endif
+    endif
+    return color
+  enddef
 endif