Enhance vim statusline

home/default.nix

@@ -299,7 +299,7 @@ in {
       viAlias = true;
       vimAlias = true;
 
-      extraConfig = builtins.readFile ./init.vim;
+      extraConfig = builtins.readFile ./nvim/init.vim;
       plugins = with pkgs.vimPlugins; [
         coc-go
         coc-json
@@ -380,5 +380,6 @@ in {
   };
 
   home.file.".emacs.d/init.el".source = ./init.el;
+  home.file.".config/nvim/statusline.vim".source = ./nvim/statusline.vim;
 
 }

home/nvim/init.vim

@@ -9,40 +9,17 @@ set ignorecase
 set incsearch
 set mouse=a
 set nocompatible
-set noswapfile
 set number relativenumber
 set pastetoggle=<F3>
 set shiftwidth=2
 set showcmd
-set showmode
 set smartcase
 set t_Co=256
 set tabstop=2
 set wildmenu
 
-" Custom statusline
-function! GitBranch()
-  return system("git rev-parse --abbrev-ref HEAD 2>/dev/null | tr -d '\n'")
-endfunction
-
-function! StatuslineGit()
-  let l:branchname = GitBranch()
-  return strlen(l:branchname) > 0?'  '.l:branchname.' ':''
-endfunction
-
-set statusline=
-set statusline+=%#PmenuSel#
-set statusline+=%{StatuslineGit()}
-set statusline+=%#LineNr#
-set statusline+=\ %f
-set statusline+=%m
-set statusline+=%=
-set statusline+=%#CursorColumn#
-set statusline+=\ %y
-set statusline+=\ %{&fileencoding?&fileencoding:&encoding}
-set statusline+=\[%{&fileformat}\]
-set statusline+=\ %p%%
-set statusline+=\ %l:%c
+" Disable swp and swo files
+set noswapfile
 
 " Remember line number
 au BufReadPost * if line("'\"") > 0 && line("'\"") <= line("$") | exe "normal! g`\"" | endif
@@ -153,3 +130,4 @@ autocmd FileType java setlocal omnifunc=javacomplete#Complete
 " vim-prettier
 let g:prettier#autoformat = 1
 
+source ~/.config/nvim/statusline.vim

home/nvim/statusline.vim

@@ -0,0 +1,64 @@
+" A lightweight statusline
+
+" Enable statusline
+set laststatus=2
+
+" Do not show mode on last line
+set noshowmode
+
+function! ActivateStatusline()
+set statusline=
+set statusline+=%#Pmenu#
+set statusline+=%{StatuslineMode()}
+set statusline+=%#PmenuSel#
+set statusline+=%{StatuslineGit()}
+set statusline+=%#LineNr#
+set statusline+=\ %f
+set statusline+=%m
+set statusline+=%=
+set statusline+=%#CursorColumn#
+set statusline+=\ %y
+set statusline+=\ %{&fileencoding?&fileencoding:&encoding}
+set statusline+=\[%{&fileformat}\]
+set statusline+=\ %p%%
+set statusline+=\ %l:%c
+endfunction
+
+" Get vim mode
+function! StatuslineMode()
+
+    let g:modeMap={
+    \ 'n'      : 'NORMAL',
+    \ 'i'      : 'INSERT',
+    \ 'c'      : 'COMMAND',
+    \ 'R'      : 'REPLACE',
+    \ 's'      : 'SELECT',
+    \ 'y'      : 'HELP',
+    \ 't'      : 'TERM',
+    \ '!'      : 'SHELL',
+    \ 'v'      : 'VISUAL',
+    \ 'V'      : 'VISUAL LINE',
+    \ "\<C-V>" : 'VISUAL BLOCK'
+    \}
+
+    if expand('%:y') == 'help'
+        let b:CurrentMode = 'HELP'
+    endif
+
+    return '  '.g:modeMap[mode()].' '
+
+endfunction
+
+function! GitBranch()
+  return system("git rev-parse --abbrev-ref HEAD 2>/dev/null | tr -d '\n'")
+endfunction
+
+function! StatuslineGit()
+  let l:branchname = GitBranch()
+  return strlen(l:branchname) > 0?'  '.l:branchname.' ':''
+endfunction
+
+augroup SetStatusline
+    autocmd!
+    autocmd BufEnter,WinEnter * call ActivateStatusline()
+augroup END