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Tip 785 Printable Monobook Previous Next

created September 9, 2004 · complexity intermediate · author Paul Braman · version 6.0


I write code for a large company and often work with other developer's code. I personally don't choose to use all the language/formatting stuff in Vim, but I do like to quickly switch between using tabs and using spaces when I hit the Tab key (to integrate with the "current" file formatting).

Here is a snippit from my vimrc which enables my default settings (using 4 spaces for every tab) and a mapping to <F9> to toggle the settings:

" virtual tabstops using spaces
set shiftwidth=4
set softtabstop=4
expandtab
" allow toggling between local and default mode
function TabToggle()
  if &expandtab
    set shiftwidth=8
    set softtabstop=0
    noexpandtab
  else
    set shiftwidth=4
    set softtabstop=4
    expandtab
  endif
endfunction
nmap <F9> mz:execute TabToggle()<CR>'z

CommentsEdit

I like this function for the same reasons, however, I encountered an error with the implementation of it which required me to make a few minor changes. The expandtab and noexpandtab were giving me errors on the Unix hosts, so I had to add the keyword "set" in front of them in three places, as shown below:

" virtual tabstops using spaces
set shiftwidth=4
set softtabstop=4
set expandtab
" allow toggling between local and default mode
function TabToggle()
  if &expandtab
    set shiftwidth=8
    set softtabstop=0
    set noexpandtab
  else
    set shiftwidth=4
    set softtabstop=4
    set expandtab
  endif
endfunction
nmap <F9> mz:execute TabToggle()<CR>'z

Grrr...that was just a mistake in my copying it into the Tip. My implementation has the "set" in front of them as well. Mea culpa!


Here is a small add_on that allows to easily change (once instead of 4 times) the local tab value. And function is changed to function! to allow local tests (:w + :so %) .

" virtual tabstops using spaces
let my_tab=4
execute "set shiftwidth=".my_tab
execute "set softtabstop=".my_tab
set expandtab
" allow toggling between local and default mode
function! TabToggle()
  if &expandtab
    set shiftwidth=8
    set softtabstop=0
    set noexpandtab
  else
    execute "set shiftwidth=".g:my_tab
    execute "set softtabstop=".g:my_tab
    set expandtab
  endif
endfunction
nmap <F9> mz:execute TabToggle()<CR>'z

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