active/inactive statusline format

vimrc

@@ -255,57 +255,86 @@ iabbrev tehn then
 
 
 " #statusline format
-set statusline=%#LineNr#
-set statusline+=\ \ \ 
-set statusline+=%#StatusLineFile#
-set statusline+=\  
-set statusline+=%#StatusLineMod#
-set statusline+=%M      " modified flag
-set statusline+=%*
-set statusline+=%#StatusLineDir#
-set statusline+=\ %{expand('%:p:h:t')}/     " directory tail
-set statusline+=%#StatusLineFile#
-set statusline+=%{expand('%:t:r')}
-set statusline+=%#StatusLineDot#
-set statusline+=.
-set statusline+=%#StatusLineExt#
-set statusline+=%{expand('%:e')}\ 
+function! ActiveStatus()
+  let l:statusline='%#StatusLineFile#  '
+  let l:statusline.='%#StatusLineMod#'
+  let l:statusline.='%M'
+  let l:statusline.='%*'
+  let l:statusline.='%#StatusLineDir# '
+  let l:statusline.=expand('%:p:h:t') . '/'
+  let l:statusline.='%#StatusLineFile#'
+  let l:statusline.="%{expand('%:t:r')}"
+  let l:statusline.='%#StatusLineDot#'
+  let l:statusline.='%#StatusLineExt#'
+  let l:extension=expand('%:e')
+  if strlen(l:extension) > 0
+    let l:statusline.='.' . l:extension
+  endif
 
-set statusline+=%*
-set statusline+=%q     " quickfix/location list flag
-set statusline+=%h     " help file flag
-set statusline+=%w     " preview window flag
-set statusline+=%r     " read only flag
-set statusline+=%#StatusLineNC#
-set statusline+=\ 
-set statusline+=%*
-set statusline+=\ %{strlen(&ft)?&ft:'none'},     " filetype
-set statusline+=%{strlen(&fenc)?&fenc:&enc},    " encoding
-set statusline+=%{&fileformat}\ 
-set statusline+=%#StatusLineNC#
-set statusline+=\ 
-set statusline+=%*
-set statusline+=\ %{&spelllang}\ 
-set statusline+=%#StatusLineNC#
+  let l:statusline.='   %*'
+  let l:statusline.='%q%h%w%r'
+  let l:statusline.='%#StatusLineNC# '
+  let l:statusline.='%*'
+  let l:statusline.=" %{strlen(&ft)?&ft:'none'},"
+  let l:statusline.='%{strlen(&fenc)?&fenc:&enc},'
+  let l:statusline.='%{&fileformat} '
+  let l:statusline.='%#StatusLineNC# '
+  let l:statusline.='%*'
+  let l:statusline.=' %{&spelllang} '
+  let l:statusline.='%#StatusLineNC#'
 
-set statusline+=%=                              " left/right separator
+  let l:statusline.='%='
 
-set statusline+=%#StatusLineNC#
-set statusline+=\ 
-set statusline+=%*
-set statusline+=\ \"%{v:register}\"\ 
-set statusline+=%#StatusLineNC#
-set statusline+=\ 
-set statusline+=%*
-set statusline+=\ %{ObsessionStatus(fnamemodify(v:this_session,':t'),'---')}\ " session status
+  let l:statusline.='%#StatusLineNC#'
+  let l:statusline.=' '
+  let l:statusline.='%*'
+  let l:statusline.=' "%{v:register}" '
+  let l:statusline.='%#StatusLineNC#'
+  let l:statusline.=' '
+  let l:statusline.='%*'
+  let l:statusline.=" %{ObsessionStatus(fnamemodify(v:this_session,':t'),'---')} "
 
-set statusline+=%#InterfaceH2#
-set statusline+=\ %{LinterStatus()}
+  let l:statusline.='%#InterfaceH2#'
+  let l:statusline.=' %{LinterStatus()}'
 
-set statusline+=%#InterfaceNormalDark#
-set statusline+=\ %P\  " percentage through file
-set statusline+=%*
+  let l:statusline.='%#InterfaceNormalDark#'
+  let l:statusline.=' %P '
+  let l:statusline.='%*'
+  return l:statusline
+endfunction
 
+function! InactiveStatus()
+  let l:statusline='%#StatusLineFile#  '
+  let l:statusline.='%#StatusLineMod#'
+  let l:statusline.='%M'
+  let l:statusline.='%*'
+  let l:statusline.='%#StatusLineDir# '
+  let l:statusline.=expand('%:p') . '/'
+  let l:statusline.='%#StatusLineFile#'
+  let l:statusline.="%{expand('%:t:r')}"
+  let l:statusline.='%#StatusLineDot#'
+  let l:statusline.='%#StatusLineExt#'
+  let l:extension=expand('%:e')
+  if strlen(l:extension) > 0
+    let l:statusline.='.' . l:extension
+  endif
+  let l:statusline.=' %*'
+
+  let l:statusline.='%=%#InterfaceH2#'
+  let l:statusline.='%{LinterStatus()}'
+
+  let l:statusline.='%#InterfaceNormalDark#'
+  let l:statusline.=' %P '
+  let l:statusline.='%*'
+
+  return l:statusline
+endfunction
+
+augroup status
+  autocmd!
+  autocmd WinEnter * setlocal statusline=%!ActiveStatus()
+  autocmd WinLeave * setlocal statusline=%!InactiveStatus()
+augroup END
 
 
 " #autocommands