How do I define function for toggling textwidth (and echoing along)?

[Santosh Kumar]

By default I have textwidth set to 78:
set textwidth=78

By this setting if I type more than 78 characters in a line, those
will be moved to next line.
I want a mapping that will toogle that textwidth to 0 (or say disable
textwidth), so that I can type long sentences in a single line.

Currently I have this mapping:
nnoremap <silent> <leader>tw :exe "set textwidth=" . (&tw ? 0 : 78)<cr>

This does the work but I don't get notified if the work has been done.
All I want is along with toggling the setting I should be notified
(i.e. if textwidth is zero then show textwidth=0 at statusline).

[Paul Isambert]

Santosh Kumar <sntsh...@gmail.com> a écrit:

Try this:

:nnoremap <silent> tw :exe "set textwidth=" . (&tw ? 0 : 78)<CR> <Bar> :echo "textwidth=" . &tw<CR>

Best,
Paul

[Santosh Kumar]

Still nothing is shown on the status bar.

Can't we create a function named Toogletw() and call it on this mapping?

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[Simon Ruderich]

On Sat, Aug 25, 2012 at 02:37:43PM +0530, Santosh Kumar wrote:
> [snip]

>
> Currently I have this mapping:
> nnoremap <silent> <leader>tw :exe "set textwidth=" . (&tw ? 0 : 78)<cr>
>
> This does the work but I don't get notified if the work has been done.
> All I want is along with toggling the setting I should be notified
> (i.e. if textwidth is zero then show textwidth=0 at statusline).

:help let-option comes useful in these cases. For example:

:nnoremap tw :let &textwidth = (&textwidth ? 0 : 78)<CR>:set textwidth?<CR>

It's a bit shorter and IMHO easier to read.

'formatoption' l (:help fo-table) might also be useful:

l Long lines are not broken in insert mode: When a line was
longer than 'textwidth' when the insert command started,
Vim does not automatically format it.

Regards,
Simon
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[Paul Isambert]

Santosh Kumar <sntsh...@gmail.com> a écrit:
>

> Still nothing is shown on the status bar.
>
> Can't we create a function named Toogletw() and call it on this mapping?

I hadn't read "status-line"; my code prints the width in the command-line.
If you want the value of "textwidth" to be mentioned in the status line, then
change the "statusline" option, and let your mapping simply change that value;
the change will be automatically reflected in the status line. The simpler
solution is (see ":help statusline"):

setlocal statusline=%!&tw

Of course the problem then is what happens if you don't have a status-line?

Best,
Paul

[Gary Johnson]

On 2012-08-25, Paul Isambert wrote:
> Santosh Kumar a �crit:

You could put a textwidth indication in the ruler, which doesn't
take as much screen space as the statusline, but 'rulerformat'
doesn't give you as much space for customization.

Regards,
Gary

[Bee]

:help colorcolumn

Add this to your .vimrc:

set colorcolumn=+1
hi ColorColumn NONE ctermbg=Cyan

When textwidth=0 there is no colorcolumn,
otherwise it is drawn just after the textwidth.

Bill

[Bee]

On Aug 25, 2012, at 8:00 PM, vim...@googlegroups.com wrote:
> From: Santosh Kumar <sntsh...@gmail.com>
> Date: Aug 25 02:37PM +0530
> Url: http://groups.google.com/group/vim_use/msg/62cda81d82f8ec51

[Andy Wokula]

Am 25.08.2012 11:07, schrieb Santosh Kumar:
> By default I have textwidth set to 78:
> set textwidth=78
>
> By this setting if I type more than 78 characters in a line, those
> will be moved to next line.
> I want a mapping that will toogle that textwidth to 0 (or say disable
> textwidth), so that I can type long sentences in a single line.
>
> Currently I have this mapping:
> nnoremap <silent> <leader>tw :exe "set textwidth=" . (&tw ? 0 : 78)<cr>

This one is more verbose, without visual clutter:

:nn <expr> <Leader>tw printf(":setl tw=%d<CR>", &tw==0 ? 78 : 0)

> This does the work but I don't get notified if the work has been done.
> All I want is along with toggling the setting I should be notified
> (i.e. if textwidth is zero then show textwidth=0 at statusline).

An example how to play with the statusline:
:h 'stl

" standard statusline
" set statusline=%<%f\ %h%m%r%=%-14.(%l,%c%V%)\ %P

set statusline=%<%f\ %h%m%r%{TwLeft()}%=%-14.(%l,%c%V%)\ %P

" remaining textwidth
func! TwLeft()
let ioff = mode()==#"i" ? 1 : 0
if &tw == 0 || virtcol(".") > &tw + ioff
return ""
else
let left = &tw + ioff - virtcol(".")
return printf('[%d %s left]', left, left==1 ? "char" : "chars")
endif
endfunc

--
Andy