Merge pull request #2033 from jonathf/index_from_1

Adding option: `buffers#buffer_idx_mode = 3`

autoload/airline/extensions/tabline/buffers.vim

@@ -162,7 +162,9 @@ function! s:get_number(index)
   endif
   let bidx_mode = get(g:, 'airline#extensions#tabline#buffer_idx_mode', 0)
   if bidx_mode > 1
-    return join(map(split(a:index+11, '\zs'), 'get(s:number_map, v:val, "")'), '')
+    let count = bidx_mode == 2 ? a:index+11 : a:index+1
+    return join(map(split(printf('%02d', count), '\zs'),
+          \ 'get(s:number_map, v:val, "")'), '')
   else
     return get(s:number_map, a:index+1, '')
   endif
@@ -201,8 +203,9 @@ function! s:map_keys()
         exe printf('noremap <silent> <Plug>AirlineSelectTab%d :call <SID>select_tab(%d)<CR>', i, i-1)
       endfor
     else
-      for i in range(11, 99)
+      let start_idx = bidx_mode == 2 ? 11 : 1
-        exe printf('noremap <silent> <Plug>AirlineSelectTab%d :call <SID>select_tab(%d)<CR>', i, i-11)
+      for i in range(start_idx, 99)
+        exe printf('noremap <silent> <Plug>AirlineSelectTab%02d :call <SID>select_tab(%d)<CR>', i, i-start_idx)
       endfor
     endif
     noremap <silent> <Plug>AirlineSelectPrevTab :<C-u>call <SID>jump_to_tab(-v:count1)<CR>

doc/airline.txt

@@ -975,7 +975,7 @@ with the middle mouse button to delete that buffer.
 
 * enable/disable displaying index of the buffer.
 
-  `buffer_idx_mode` allows 2 different modes to access buffers from the
+  `buffer_idx_mode` allows 3 different modes to access buffers from the
   tabline. When enabled, numbers will be displayed in the tabline and
   mappings will be exposed to allow you to select a buffer directly.
   In default mode, when the variable is 1 Up to 11 mappings will be
@@ -994,9 +994,7 @@ with the middle mouse button to delete that buffer.
   nmap <leader>- <Plug>AirlineSelectPrevTab
   nmap <leader>+ <Plug>AirlineSelectNextTab
 <
-  In mode 2, (when the variable is 2) 89 mappings will be exposed
+  In mode 2, (when the variable is 2) 89 mappings will be exposed: >
-  (Note: To avoid ambiguity, there won't be <Plug>AirlineSelectTab1
-  - <Plug>AirlineSelectTab9 maps): >
 
   let g:airline#extensions#tabline#buffer_idx_mode = 2
   nmap <Leader>10 <Plug>AirlineSelectTab10
@@ -1009,6 +1007,22 @@ with the middle mouse button to delete that buffer.
   The <Plug>AirlineSelect<Prev/Next>Tab mapping handles counts as well,
   so one can handle arbirtrarily number of buffers/tabs.
 
+  Mode 3 is exactly the same as mode 2, except the indexing start at 01,
+  exposing 99 mappings: >
+
+  let g:airline#extensions#tabline#buffer_idx_mode = 3
+  nmap <Leader>01 <Plug>AirlineSelectTab01
+  nmap <Leader>02 <Plug>AirlineSelectTab02
+  nmap <Leader>03 <Plug>AirlineSelectTab03
+  ...
+  nmap <Leader>99 <Plug>AirlineSelectTab99
+<
+  This matches that of the numbering scheme of |:buffers|, letting
+  `<Plug>AirlineSelectTab67` to reference buffer 67.
+
+  Note: To avoid ambiguity, there won't be <Plug>AirlineSelectTab1
+  - <Plug>AirlineSelectTab9 maps in mode 2 and 3.
+
   Note: Mappings will be ignored for filetypes that match
   `g:airline#extensions#tabline#keymap_ignored_filetypes`.