Add three types

autoload/SpaceVim.vim

@@ -170,8 +170,16 @@ let g:spacevim_enable_debug            = 0
 let g:spacevim_debug_level             = 1
 let g:spacevim_hiddenfileinfo          = 1
 let g:spacevim_plugin_groups_exclude   = []
-
-
+""
+" Set SpaceVim buffer index type, default is 0
+" >
+"   " types:
+"   " 0: 1 ➛ ➊ 
+"   " 1: 1 ➛ ➀
+"   " 2: 1 ➛ ⓵
+"   let g:spacevim_buffer_index_type = 1
+" <
+let g:spacevim_buffer_index_type = 0
 ""
 " Plugin groups to be loaded.
 " >

config/plugins/vim-airline.vim

@@ -7,7 +7,9 @@ let g:Powerline_sybols = 'unicode'
 let g:airline#extensions#tabline#buffer_idx_mode = 1
 let g:airline#extensions#tabline#buffer_idx_format = {}
 for i in range(9)
-    call extend(g:airline#extensions#tabline#buffer_idx_format, {i : SpaceVim#api#import('messletters').bubble_num(i, 1). ' '})
+    call extend(g:airline#extensions#tabline#buffer_idx_format,
+                \ {i : SpaceVim#api#import('messletters').bubble_num(i,
+                \ g:spacevim_buffer_index_type). ' '})
 endfor
 unlet i
 let g:airline#extensions#tabline#formatter = 'spacevim'

doc/SpaceVim.txt

@@ -198,6 +198,16 @@ Enable/Disable debug mode for SpaceVim. Default is 0.
                                                       *g:spacevim_debug_level*
 Set the debug level of SpaceVim. Default is 1.
 
+                                                *g:spacevim_buffer_index_type*
+Set SpaceVim buffer index type, default is 0
+>
+  " types:
+  " 0: 1 ➛ ➊
+  " 1: 1 ➛ ➀
+  " 2: 1 ➛ ⓵
+  let g:spacevim_buffer_index_type = 1
+<
+
                                                     *g:spacevim_plugin_groups*
 Plugin groups to be loaded.
 >