On 7/13/06, Hari Krishna Dara <[EMAIL PROTECTED]> wrote:
On Thu, 13 Jul 2006 at 9:21am, Yakov Lerner wrote:
> On 7/13/06, Peter Hodge <[EMAIL PROTECTED]> wrote:
> > However, if I type anything beginning with 'for', the letters disappear
> > until I
> > type something that is not part of the mapping. I understand this is
> > the
> > standard behaviour, but is there any way to change it so I can see
> > what I am
> > typing?
>
> Although there is no stardard option for imap to do this (make incompete
> mapping visible; yes I'd find it seful, too), I found a weird trick that
> does what you want.
> Does the following do what you want:
> -----------------------------
> :imap h <c-r>=PrecedingChars(6) !=# 'foreac' ? 'h' : ExpandForeach() <cr>
>
> function! ExpandForeach() " expansion of the foreach mapping
> " nb: 'foreac' is already there. So we don't need to repeat it
> return "h() {\n}\<Left>"
> endfunction
>
> function! PrecedingChars(n)
> " return n chars preceding cursor in rhs of :imap mapping
> return getline('.')[col('.')-1-a:n : col('.')-2]
> endfunction
> -------------------------------
Very clever alternative to iab. You can take advantage of the new <expr>
maps to simplify and generalize this as below (note, I changed the
mapping to not remap):
:inoremap <expr> h CheckExpand('foreac', 'h', "h() {\n}\<Left>") " expansion of
the foreach mapping
function! CheckExpand(precChars, curChar, expansion)
if PrecedingChars(strlen(a:precChars)) ==# a:precChars
" nb: precChar is already there. So we don't need to repeat it
return a:expansion
else
return a:curChar
endif
endfunction
function! PrecedingChars(n)
" return n chars preceding cursor in rhs of :imap mapping
return getline('.')[col('.')-1-a:n : col('.')-2]
endfunction
Nice generalization, yes.
Yakov
