tabline: add forgotten changes from commit cd1d8c2a96

I accidentally missed including some more changes for buffer_idx_mode=2.
So add those files now.

CHANGELOG.md

@@ -9,6 +9,8 @@ This is the Changelog for the vim-airline project.
   - Improvements
     - The statusline can be configured to be shown on top (in the tabline)
       Set the `g:airline_statusline_ontop` to enable this experimental feature.
+    - If `buffer_idx_mode=2`, up to 89 mappings will be exposed to access more
+      buffers directly (issue #1823)
 
 ## [0.10] - 2018-12-15
 - New features

autoload/airline/extensions/tabline/tabs.vim

@@ -104,9 +104,16 @@ function! airline#extensions#tabline#tabs#map_keys()
   if maparg('<Plug>AirlineSelectTab1', 'n') is# ':1tabn<CR>'
     return
   endif
+  let bidx_mode = get(g:, 'airline#extensions#tabline#buffer_idx_mode', 1)
+  if bidx_mode == 1
     for i in range(1, 9)
       exe printf('noremap <silent> <Plug>AirlineSelectTab%d :%dtabn<CR>', i, i)
     endfor
+  else
+      for i in range(10, 99)
+        exe printf('noremap <silent> <Plug>AirlineSelectTab%d :%dtabn<CR>', i, i-9)
+      endfor
+    endif
   noremap <silent> <Plug>AirlineSelectPrevTab gT
   " tabn {count} goes to count tab does not go {count} tab pages forward!
   noremap <silent> <Plug>AirlineSelectNextTab :<C-U>exe repeat(':tabn\|', v:count1)<cr>

doc/airline.txt

@@ -859,9 +859,10 @@ with the middle mouse button to delete that buffer.
 
 * enable/disable displaying index of the buffer.
 
-  When enabled, numbers will be displayed in the tabline and mappings will be
-  exposed to allow you to select a buffer directly. Up to 11 mappings will be
-  exposed. >
+  `buffer_idx_mode` allows 2 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 exposed: >
 
   let g:airline#extensions#tabline#buffer_idx_mode = 1
   nmap <leader>1 <Plug>AirlineSelectTab1
@@ -875,6 +876,18 @@ with the middle mouse button to delete that buffer.
   nmap <leader>9 <Plug>AirlineSelectTab9
   nmap <leader>- <Plug>AirlineSelectPrevTab
   nmap <leader>+ <Plug>AirlineSelectNextTab
+<
+  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
+  nmap <Leader>11 <Plug>AirlineSelectTab11
+  nmap <Leader>12 <Plug>AirlineSelectTab12
+  nmap <Leader>13 <Plug>AirlineSelectTab13
+  ...
+  nmap <Leader>99 <Plug>AirlineSelectTab99
 <
   The <Plug>AirlineSelect<Prev/Next>Tab mapping handles counts as well,
   so one can handle arbirtrarily number of buffers/tabs.