add neodark theme

plugins.vim

@@ -106,6 +106,7 @@ Plug 'whatyouhide/vim-gotham'
 Plug 'rakr/vim-one'
 Plug 'kaicataldo/material.vim'
 Plug 'joshdick/onedark.vim'
+Plug 'KeitaNakamura/neodark.vim'
 
 if !exists('g:started_by_firenvim')
   " colorful status line and theme

ui.vim

@@ -13,7 +13,7 @@ set background=dark
 
 "{{ Colorscheme settings
 let s:candidate_theme = ['gruvbox8', 'srcery', 'badwolf', 'deus', 'happy_hacking', 'solarized8',
-      \ 'monokai', 'gotham', 'vim_one', 'material']
+      \ 'monokai', 'gotham', 'vim_one', 'material', 'onedark']
 let s:idx = utils#RandInt(0, len(s:candidate_theme)-1)
 let s:theme = s:candidate_theme[s:idx]
 
@@ -111,6 +111,23 @@ function! s:my_theme_dict.material() dict abort
   endif
 endfunction
 
+function! s:my_theme_dict.onedark() dict abort
+  if utils#HasColorscheme('onedark')
+    let g:onedark_terminal_italics = 1
+    colorscheme onedark
+  else
+    colorscheme desert
+  endif
+endfunction
+
+function! s:my_theme_dict.neodark() dict abort
+  if utils#HasColorscheme('neodark')
+    colorscheme neodark
+  else
+    colorscheme desert
+  endif
+endfunction
+
 execute printf('call s:my_theme_dict.%s()', s:theme)
 
 """"""""""""""""""""""""""" deus settings"""""""""""""""""""""""""""""""""