Re: problems with executing a search from within a function that is called in a vmap

Am 07.03.2010 12:39, schrieb James Cole:
> Hi,
>
> I was trying to write a vmap for a custom text-object, and I could
> move the cursor to select the text by using a search specified
> directly within the vmap, but if I tried to instead put those searches
> in separte functions and call those functions from within the vmap, it
> didn't work.

When you execute the sequence
V:<C-U>call NextSection()<Enter>
by hand, you will notice that returning from Cmdline mode clears the
visual area. Executing
normal! gv
early within function restores the visual area.

> function! PrevSection()
> execute "?^:"
> endfunction
>
> function! NextSection()
> execute "/^:"
> endfunction
>
> vmap ac<ESC>:call PrevSection()<CR>V:call NextSection()<CR>k
>
> (BTW, this is for a text file format I'm using that contains sections
> delimited by headings - a heading is just a line that starts with a
> colon.
> e.g.
>
> :section 1 heading
>
> text of section one
>
> ::section 1.1 heading
>
> some more text
>
> :section 2 heading
>
> the text of section 2
> )

suggestion:

function! SelectASection()
call search("^:", "bcW")
normal! V
let line2 = search("^:", "W")
if line2 == 0
$
else
-
endif
endfunction

noremap <silent> ac :<C-U>call SelectASection()<CR>
nunmap ac| sunmap ac

This will work for Visual mode and Operator pending mode.

TODO (maybe)
- support a count
- if there is already a Visual area, extend it (don't replace it)

--
Andy

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