add function to switch between light and dark cs

init.vim

@@ -84,6 +84,7 @@ nnoremap <Leader>vl :setlocal cursorline!<CR>
 nnoremap <Leader>vc :setlocal cursorcolumn!<CR>
 nnoremap <Leader>ve :setlocal colorcolumn=80<CR>
 nnoremap <Leader>vn :setlocal colorcolumn=0<CR>
+nnoremap <Leader>tcs :call ToggleColorscheme()<CR>
 nnoremap Y y$
 nnoremap j gj
 nnoremap k gk
@@ -144,8 +145,28 @@ call plug#end()
 """""""""""""""
 " Colorscheme "
 """""""""""""""
-"colorscheme seoul256
-"colorscheme molokai
-colorscheme PaperColor
-"colorscheme Tomorrow-Night
+function! ToggleColorscheme()
+    if g:colors_name == 'PaperColor'
+        call ToggleBackground()
+    elseif g:colors_name =~ 'seoul256'
+        call ToggleSeoul256()
+    elseif g:colors_name =~ 'Tomorrow'
+        call ToggleTomorrow()
+    endif
+
+    AirlineRefresh
+endfunction
+
+function! ToggleBackground()
+        if &background == 'dark'
+            set background=light
+        else
+            set background=dark
+        endif
+endfunction
+
+"colorscheme molokai
+"colorscheme seoul256
+"colorscheme PaperColor
+colorscheme Tomorrow-Night
 

plugins/molokai.vim

@@ -1,6 +1,4 @@
 Plug 'tomasr/molokai'
 
-set background=dark
-
 "let g:molokai_original = 1
 let g:rehash256 = 1

plugins/seoul256.vim

@@ -17,7 +17,7 @@ Plug 'junegunn/seoul256.vim'
 let g:seoul256_background       = 237
 let g:seoul256_light_background = 254
 
-function! ToggleColorscheme()
+function! ToggleSeoul256()
     if g:colors_name == 'seoul256'
         colorscheme seoul256-light
     else
@@ -25,14 +25,3 @@ function! ToggleColorscheme()
     endif
 endfunction
 
-function! SetColorschemeDark(value)
-    let g:seoul256_background = a:value
-    colorscheme seoul256
-endfunction
-
-function! SetColorschemeLight(value)
-    let g:seoul256_light_background = a:value
-    colorscheme seoul256-light
-endfunction
-
-noremap <leader>st :call ToggleColorscheme()<CR>

plugins/tomorrow-theme.vim

@@ -1 +1,10 @@
 Plug 'chriskempson/tomorrow-theme'
+
+function! ToggleTomorrow()
+    if g:colors_name == 'Tomorrow-Night'
+        colorscheme Tomorrow
+    else
+        colorscheme Tomorrow-Night
+    endif
+endfunction
+