From 7a2f6525c3e5de618d8481f5b1b5b35678022193 Mon Sep 17 00:00:00 2001
From: Bailey Ling <bling@live.ca>
Date: Fri, 6 Sep 2013 21:50:06 +0000
Subject: [PATCH] implement customizable file name formatting (#230).

---
 autoload/airline/deprecation.vim        |  3 ++-
 autoload/airline/extensions/tabline.vim |  9 +++++++--
 doc/airline.txt                         | 11 +++++++++--
 3 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/autoload/airline/deprecation.vim b/autoload/airline/deprecation.vim
index 7df9150f..1c66c58f 100644
--- a/autoload/airline/deprecation.vim
+++ b/autoload/airline/deprecation.vim
@@ -19,10 +19,11 @@ function! airline#deprecation#check()
         \ [ 'g:airline_enable_branch', 'g:airline#extensions#branch#enabled' ],
         \ [ 'g:airline_enable_bufferline', 'g:airline#extensions#bufferline#enabled' ],
         \ [ 'g:airline_enable_syntastic', 'g:airline#extensions#syntastic#enabled' ],
+        \ [ 'g:airline#extensions#tabline#fnamemod', 'g:airline#extensions#tabline#fnamefunc' ],
         \ ]
   for test in tests
     if exists(test[0])
-      echom printf('The variable %s is deprecated and may not work in the future. It has been replaced with %s', test[0], test[1])
+      echom printf('The variable %s is deprecated and may not work in the future. It has been replaced with %s. Please read the documentation.', test[0], test[1])
     endif
   endfor
 endfunction
diff --git a/autoload/airline/extensions/tabline.vim b/autoload/airline/extensions/tabline.vim
index 7969f6ff..81b81e7a 100644
--- a/autoload/airline/extensions/tabline.vim
+++ b/autoload/airline/extensions/tabline.vim
@@ -1,7 +1,7 @@
 " MIT License. Copyright (c) 2013 Bailey Ling.
 " vim: et ts=2 sts=2 sw=2
 
-let s:fmod = get(g:, 'airline#extensions#tabline#fnamemod', ':p:.')
+let s:fnamefunc = get(g:, 'airline#extensions#tabline#fnamefunc', 'airline#extensions#tabline#fname_func')
 let s:excludes = get(g:, 'airline#extensions#tabline#excludes', [])
 let s:tab_nr_type = get(g:, 'airline#extensions#tabline#tab_nr_type', 0)
 let s:show_buffers = get(g:, 'airline#extensions#tabline#show_buffers', 1)
@@ -82,6 +82,11 @@ function! airline#extensions#tabline#title(n)
   return airline#extensions#tabline#get_buffer_name(buflist[winnr - 1])
 endfunction
 
+function! airline#extensions#tabline#fname_func(name)
+  let fmod = get(g:, 'airline#extensions#tabline#fnamemod', ':p:.')
+  return substitute(fnamemodify(a:name, fmod), '\w\zs.\{-}\ze\/', '', 'g')
+endfunction
+
 function! airline#extensions#tabline#get_buffer_name(nr)
   let _ = ''
   let name = bufname(a:nr)
@@ -93,7 +98,7 @@ function! airline#extensions#tabline#get_buffer_name(nr)
   if empty(name)
     let _ .= '[No Name]'
   else
-    let _ .= fnamemodify(name, s:fmod)
+    let _ .= call(s:fnamefunc, [name])
   endif
 
   if getbufvar(a:nr, '&modified') == 1
diff --git a/doc/airline.txt b/doc/airline.txt
index c35d7aed..9239f3b0 100644
--- a/doc/airline.txt
+++ b/doc/airline.txt
@@ -305,8 +305,15 @@ virtualenv <https://github.com/jmcantrell/vim-virtualenv>
 * enable/disable displaying buffers with a single tab. >
   let g:airline#extensions#tabline#show_buffers = 1
 <
-* configure the formatting of filenames (see |filename-modifiers|). >
-  let g:airline#extensions#tabline#fnamemod = ':p:.'
+* defines a function for how to format the file name. >
+  " the default renders /foo/bar/file.txt => /f/b/file.txt
+  let g:airline#extensions#tabline#fnamefunc
+
+  " here's a simple example to show only the file name:
+  function! MyFileFormat(file)
+    return fnamemodify(a:file, ':t')
+  endfunction
+  let g:airline#extensions#tabline#fnamefunc = 'MyFileFormat'
 <
 * configure filename match rules to exclude from the tabline. >
   let g:airline#extensions#tabline#excludes = []