From 9387517f01b9a485012ed7df802c93563e7f35b6 Mon Sep 17 00:00:00 2001
From: Christian <cb@256bit.org>
Date: Wed, 18 Nov 2020 15:01:00 +0100
Subject: [PATCH] default tablineformatter: implement as vim9 script

---
 .../extensions/tabline/formatters/default.vim | 35 ++++++++++++++++++-
 1 file changed, 34 insertions(+), 1 deletion(-)

diff --git a/autoload/airline/extensions/tabline/formatters/default.vim b/autoload/airline/extensions/tabline/formatters/default.vim
index 92b60350..9a0d10c1 100644
--- a/autoload/airline/extensions/tabline/formatters/default.vim
+++ b/autoload/airline/extensions/tabline/formatters/default.vim
@@ -3,7 +3,6 @@
 
 scriptencoding utf-8
 
-unlet! g:airline_experimental
 if !exists(":def") || (exists(":def") && get(g:, "airline_experimental", 0)==0)
   function! airline#extensions#tabline#formatters#default#format(bufnr, buffers)
     let fnametruncate = get(g:, 'airline#extensions#tabline#fnametruncate', 0)
@@ -46,4 +45,38 @@ if !exists(":def") || (exists(":def") && get(g:, "airline_experimental", 0)==0)
     return _
   endfunction
 else
+  " New Vim9 script implementation {{{1
+  def airline#extensions#tabline#formatters#default#format(bufnr: number, buffers: list<number>): string # {{{2
+    var fmod = get(g:, 'airline#extensions#tabline#fnamemod', ':~:.')
+    var result = ''
+		var fnametruncate = get(g:, 'airline#extensions#tabline#fnametruncate', 0)
+
+    var name = bufname(bufnr)
+    if empty(name)
+      result =  '[No Name]'
+    elseif name =~ 'term://'
+      # Neovim Terminal
+      result = substitute(name, '\(term:\)//.*:\(.*\)', '\1 \2', '')
+    else
+      if get(g:, 'airline#extensions#tabline#fnamecollapse', 1)
+         result = pathshorten(fnamemodify(name, fmod))
+      else
+         result = fnamemodify(name, fmod)
+      endif
+      if bufnr != bufnr('%') && fnametruncate && strlen(result) > fnametruncate
+        result = strpart(result, 0, fnametruncate)
+      endif
+    endif
+    return airline#extensions#tabline#formatters#default#wrap_name(bufnr, result)
+  enddef
+  def airline#extensions#tabline#formatters#default#wrap_name(bufnr: number, buffer_name: string): string # {{{2
+		var buf_nr_show = get(g:, 'airline#extensions#tabline#buffer_nr_show', 0)
+		var buf_nr_format = get(g:, 'airline#extensions#tabline#buffer_nr_format', '%s: ')
+    var result = buf_nr_show ? printf(buf_nr_format, bufnr) : ''
+    result = result .. substitute(buffer_name, '\\', '/', 'g')
+    if getbufvar(bufnr, '&modified') == 1
+      result = result .. g:airline_symbols.modified
+    endif
+    return result
+  enddef
 endif