Add more custom functions (#3260)

- Spacevim#custom#LangSPC
- SpaceVim#custom#LangSPCGroupName

autoload/SpaceVim.vim

@@ -1217,6 +1217,8 @@ let g:spacevim_wildignore
 let g:_spacevim_mappings = {}
 let g:_spacevim_mappings_space_custom = []
 let g:_spacevim_mappings_space_custom_group_name = []
+let g:_spacevim_mappings_language_specified_space_custom = {}
+let g:_spacevim_mappings_language_specified_space_custom_group_name = {}
 let g:_spacevim_neobundle_installed     = 0
 let g:_spacevim_dein_installed          = 0
 let g:_spacevim_vim_plug_installed      = 0

autoload/SpaceVim/custom.vim

@@ -84,6 +84,19 @@ function! SpaceVim#custom#SPCGroupName(keys, name) abort
   call add(g:_spacevim_mappings_space_custom_group_name, [a:keys, a:name])
 endfunction
 
+function! SpaceVim#custom#LangSPC(ft, m, keys, cmd, desc, is_cmd) abort
+  if !has_key(g:_spacevim_mappings_language_specified_space_custom, a:ft)
+    let g:_spacevim_mappings_language_specified_space_custom[a:ft] = []
+  endif
+  call add(g:_spacevim_mappings_language_specified_space_custom[a:ft], [a:m, a:keys, a:cmd, a:desc, a:is_cmd])
+endfunction
+
+function! SpaceVim#custom#LangSPCGroupName(ft, keys, name) abort
+  if !has_key(g:_spacevim_mappings_language_specified_space_custom_group_name, a:ft)
+    let g:_spacevim_mappings_language_specified_space_custom_group_name[a:ft] = []
+  endif
+  call add(g:_spacevim_mappings_language_specified_space_custom_group_name[a:ft], [a:keys, a:name])
+endfunction
 
 function! SpaceVim#custom#apply(config, type) abort
   " the type can be local or global

autoload/SpaceVim/mapping/space.vim

@@ -636,12 +636,29 @@ endfunction
 
 let s:language_specified_mappings = {}
 function! SpaceVim#mapping#space#refrashLSPC() abort
+  " Predefined mappings
   let g:_spacevim_mappings_space.l = {'name' : '+Language Specified'}
   if !empty(&filetype) && has_key(s:language_specified_mappings, &filetype)
     call call(s:language_specified_mappings[&filetype], [])
     let b:spacevim_lang_specified_mappings = g:_spacevim_mappings_space.l
   endif
 
+  " Customized mappings
+  if has_key(g:_spacevim_mappings_language_specified_space_custom_group_name, &filetype)
+    for argv in g:_spacevim_mappings_language_specified_space_custom_group_name[&filetype]
+      " Only support one layer of groups
+      if !has_key(g:_spacevim_mappings_space.l, argv[0][0])
+        let g:_spacevim_mappings_space.l[argv[0][0]] = {'name' : argv[1]}
+      endif
+    endfor
+  endif
+  if has_key(g:_spacevim_mappings_language_specified_space_custom, &filetype)
+    for argv in g:_spacevim_mappings_language_specified_space_custom[&filetype]
+      let argv = deepcopy(argv)
+      let argv[1] = ['l'] + argv[1]
+      call call('SpaceVim#mapping#space#langSPC', argv)
+    endfor
+  endif
 endfunction
 
 function! SpaceVim#mapping#space#regesit_lang_mappings(ft, func) abort