how do i remap dd so that it becomes context-dependent?

[leo]

Hello all,

I'm using "set wrap". I'd like to come up with a remap of dd that would does the follwing:
If the current line is wrapped, it then performs g0dg$
Else, it performs the conventional dd.

The problem is this. if i just use:
vnoremap dd g0dg$
nnoremap dd g0dg$
whenever i have non wrapped lines, such as:
a
b
c
And I "dd" line two, it will end up with sth like:
a
(blank line)
c
Instead of this expecting result:
a
c

Thanks in advance

[Nikolay Pavlov]

Check whether virtcol('$') is greater then winwidth(0): something like this:

nnoremap <expr> dd (virtcol('$') > winwidth(0)) ? 'g0dg$' : 'dd'

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[Leonardo Barbosa]

Thanks Nikolay. That did the job. I was wondering if i could pass an
argument to the map so that i can do something like : 2dd, 3dd, and so
on...

Leo

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[Nikolay Pavlov]

On Jul 14, 2013 1:53 AM, "Leonardo Barbosa" <barbosa....@gmail.com> wrote:
>
> Thanks Nikolay. That did the job. I was wondering if i could pass an
> argument to the map so that i can do something like : 2dd, 3dd, and so
> on...

Count is accessible via v:count and v:count1. You will have to write function that handles it properly though in the case of lengthy lines.

[Paul Isambert]

Nikolay Pavlov <zyx...@gmail.com> a écrit:

> On Jul 14, 2013 1:53 AM, "Leonardo Barbosa" <barbosa....@gmail.com>
> wrote:
> >
> > Thanks Nikolay. That did the job. I was wondering if i could pass an
> > argument to the map so that i can do something like : 2dd, 3dd, and so
> > on...
>
> Count is accessible via v:count and v:count1. You will have to write
> function that handles it properly though in the case of lengthy lines.

This should work:

nnoremap <buffer> <expr> dd (virtcol('$') > winwidth(0)) ? 'g0d' . (v:count > 1 ? 'v' . v:count : '') . 'g$' : 'dd'

The conditional addition of “v” is explained (more or less) in my next message.