Re: cmapping woes

[Eric Arnold]

On 5/21/06, Yakov Lerner <[EMAIL PROTECTED]> wrote:

On 5/22/06, Eric Arnold <[EMAIL PROTECTED]> wrote:
> I've been trying to map "cd" if it's the first two characters on the
> :ex  line.  I've tried all the combinations I can think of.  On
> several of them, I seem to be getting errors as if <expr> is run in
> the sandbox (that dog won't hunt).  The only one that works at all is
> the first simple mapping, but that gets painful, of course, when you
> want to use "cd" in a search, etc.
>
> Anybody know any good tricks?
>
>
> silent! cunmap cd
>
> cnoremap <silent> cd call Cd_plus()<CR>
>
> "cnoremap <silent> cd echo getcmdpos()<CR>
> "cnoremap <silent> cd if getcmdpos() < 3 <bar> call Cd_plus() <bar>
> else <bar> call feedkeys('cd','n') <bar> call setcmdpos(1) <bar> end
> <CR>
> "cnoremap <silent> <expr> cd ( getcmdpos() == 1 ? Cd_plus() : 'cd' )
> "cnoremap <silent> <expr> cd Cd_plus()
> "abbr <silent> <expr> cd Cd_plus()
> "silent! unabbr cd

The following works for me:

cnoremap cd <c-R>=getcmdpos()==1?"MYCD ":'cd'<cr>

This is nearly it.  I'm actually trying to start a script from the
mapping.  This starts "MYCD", but interfers with 'cd'

cnoremap cd <c-R>=getcmdpos()==1 ? "MYCD " :'cd'<cr><CR>

I tried adding a CR inside the <C-R>= expression after MYCD, but it
seems that any control chars returned from an expression are escaped
as literals i.e. you see

:MYCD<0d>

show up as the result.

I can't run the script directly from inside the <C-R>= expression
because of the sandbox restrictions.

This seems to be the only thing that works:

cnoremap cd <c-R>=getcmdpos()==1 && getcmdtype() == ':' ? feedkeys(
"call Cd_plus()<c-v><cr>",'t' ) :'cd'<cr>

Oddly, "feedkeys()" doesn't seem to work if <expr> is used instead of <C-R>=

This would all be soooo much simpler without the sandbox.  There
should be a way to bypass it.

Notes
1. Don't use <silent> on cabbrev (doesn't work, documented somewhere).
<silent> on cmap sometimes doesn't work, too.

Yeh, I noticed it seems to inhibit the display of the replaced string.

2. I think you're better off making your
own cd :command not just function.

Yakov