From 8d7c2ad8305fe258340e973a48a66d7b1bb09f24 Mon Sep 17 00:00:00 2001
From: zdm <zdm@softvisio.net>
Date: Sun, 22 Dec 2013 02:27:42 +0200
Subject: [PATCH] uniq_tail improved formatter added

---
 autoload/airline/extensions/tabline.vim       |  5 +-
 .../airline/extensions/tabline/formatters.vim | 82 ++++++++++++++++++-
 2 files changed, 84 insertions(+), 3 deletions(-)

diff --git a/autoload/airline/extensions/tabline.vim b/autoload/airline/extensions/tabline.vim
index 2936c0e3..79154246 100644
--- a/autoload/airline/extensions/tabline.vim
+++ b/autoload/airline/extensions/tabline.vim
@@ -5,6 +5,7 @@ let s:formatter = get(g:, 'airline#extensions#tabline#formatter', 'default')
 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)
+let s:show_tab_nr = get(g:, 'airline#extensions#tabline#show_tab_nr', 1)
 
 let s:builder_context = {
       \ 'active'        : 1,
@@ -103,7 +104,7 @@ function! airline#extensions#tabline#title(n)
 endfunction
 
 function! airline#extensions#tabline#get_buffer_name(nr)
-  return airline#extensions#tabline#formatters#{s:formatter}(a:nr, get(s:, 'current_buffer_list', []))
+  return airline#extensions#tabline#formatters#{s:formatter}(a:nr, get(s:, 'current_buffer_list', s:get_buffer_list()))
 endfunction
 
 function! s:get_buffer_list()
@@ -245,8 +246,10 @@ function! s:get_tabs()
     if s:tab_nr_type == 0
       let val .= ' %{len(tabpagebuflist('.i.'))}'
     else
+      if s:show_tab_nr 
       let val .= (g:airline_symbols.space).i
     endif
+    endif
     call b.add_section(group, val.'%'.i.'T %{airline#extensions#tabline#title('.i.')} %)')
   endfor
 
diff --git a/autoload/airline/extensions/tabline/formatters.vim b/autoload/airline/extensions/tabline/formatters.vim
index 656ba225..ffb9a64b 100644
--- a/autoload/airline/extensions/tabline/formatters.vim
+++ b/autoload/airline/extensions/tabline/formatters.vim
@@ -49,12 +49,90 @@ function! airline#extensions#tabline#formatters#unique_tail(bufnr, buffers)
   return map[a:bufnr]
 endfunction
 
+function! airline#extensions#tabline#formatters#unique_tail_improved(bufnr, buffers)
+  if len(a:buffers) <= 1 " don't need to compare bufnames if has less than one buffer opened
+    return airline#extensions#tabline#formatters#default(a:bufnr, a:buffers)
+  endif
+
+  let curbuf_tail = fnamemodify(bufname(a:bufnr), ':t')
+  let do_deduplicate = 0
+  let path_tokens = {}
+
+  for nr in a:buffers
+    let name = bufname(nr)
+    if !empty(name) && nr != a:bufnr && fnamemodify(name, ':t') == curbuf_tail
+      let do_deduplicate = 1
+      let tokens = reverse(split(substitute(fnamemodify(name, ':p:.:h'), '\\', '/', 'g'), '/'))
+      let token_index = 0
+      for token in tokens
+        if token == '.' | break | endif
+        if !has_key(path_tokens, token_index)
+          let path_tokens[token_index] = {}
+        endif
+        let path_tokens[token_index][token] = 1
+        let token_index += 1
+      endfor
+    endif
+  endfor
+
+  if do_deduplicate == 1
+    let path = []
+    let token_index = 0
+    for token in reverse(split(fnamemodify(bufname(a:bufnr), ':p:.:h'), '\'))
+      if token == '.' | break | endif
+      let duplicated = 0
+      let uniq = 1
+      let single = 1
+      if has_key(path_tokens, token_index)
+        let duplicated = 1
+        if len(keys(path_tokens[token_index])) > 1 | let single = 0 | endif
+        if has_key(path_tokens[token_index], token) | let uniq = 0 | endif
+      endif
+      call insert(path, {'token': token, 'duplicated': duplicated, 'uniq': uniq, 'single': single})
+      let token_index += 1
+    endfor
+
+    let buf_name = [curbuf_tail]
+    let has_uniq = 0
+    let has_skipped = 0
+    let skip_symbol = '…'
+    for token1 in reverse(path)
+      if !token1['duplicated'] && len(buf_name) > 1
+        call insert(buf_name, skip_symbol)
+        break
+      endif
+
+      if has_uniq == 1
+        call insert(buf_name, skip_symbol)
+        break
+      endif
+
+      if token1['uniq'] == 0 && token1['single'] == 1
+        let has_skipped = 1
+      else
+        if has_skipped == 1
+          call insert(buf_name, skip_symbol)
+          let has_skipped = 0
+        endif
+        call insert(buf_name, token1['token'])
+      endif
+
+      if token1['uniq'] == 1
+        let has_uniq = 1
+      endif
+    endfor
+    return s:wrap_name(a:bufnr, join(buf_name, '/'))
+  else
+    return airline#extensions#tabline#formatters#default(a:bufnr, a:buffers)
+  endif
+endfunction
+
 function! s:wrap_name(bufnr, buffer_name)
   let _ = s:buf_nr_show ? printf(s:buf_nr_format, a:bufnr) : ''
-  let _ .= a:buffer_name
+  let _ .= substitute(a:buffer_name, '\\', '/', 'g')
+
   if getbufvar(a:bufnr, '&modified') == 1
     let _ .= s:buf_modified_symbol
   endif
   return _
 endfunction
-