Is it possible to visualize the right margin in Vim?

Is there any way to make Vim (or gVim, or both) highlight the right margin of the current buffer?

I have just begun to work with Vim for a while, and find it annoying not to have the right margin visible (say, at column 80).

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There is no simple way to visualize a vertical edge for the textwidth-margin in Vim 7.2 or earlier; starting with version 7.3, there is dedicated colorcolumn option. However, one can highlight all characters beyond the 80-column limit using the :match command:

:match ErrorMsg /\%>80v.\+/

All we need to make it a general solution, is to build the match pattern on the fly to substitute the correct value of the textwidth option:

:autocmd BufWinEnter * call matchadd('ErrorMsg', '\%>'.&l:textwidth.'v.\+', -1)
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最佳答案

Vim 7.3 introduced colorcolumn.

:set colorcolumn=80

It may be easier for you to remember the short form.

:set cc=80
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I've written a vimscript function in my .vimrc to toggle colorcolumn when I press ,8 (comma followed by 8, where comma is the defined leader for user-defined commands, and eight is my mnemonic key for 'show a margin at the 80th column):

" toggle colored right border after 80 chars
set colorcolumn=81
let s:color_column_old = 0


function! s:ToggleColorColumn()
if s:color_column_old == 0
let s:color_column_old = &colorcolumn
windo let &colorcolumn = 0
else
windo let &colorcolumn=s:color_column_old
let s:color_column_old = 0
endif
endfunction


nnoremap <Leader>8 :call <SID>ToggleColorColumn()<cr>
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I've rewritten the answer of Jonathan Hartley for the older Vim versions like 7.2 as there is no colorcolumn in older Vims.

highlight OverLength ctermbg=red ctermfg=white guibg=#592929


let s:OverLengthToggleVariable=0


function! ToggleOverLength()
if s:OverLengthToggleVariable == 0
match OverLength /\%81v.\+/
let s:OverLengthToggleVariable=1
else
match OverLength //
let s:OverLengthToggleVariable=0
endif
endfunction


" I like <leader>h since highlight starts with h.
nnoremap <leader>h :call ToggleOverLength()<cr>

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