Re: How to search from inside a function

On 25/12/11 15:49, Asis Hallab wrote:
> Merry Christmas to all!
>
> Hopefully anyone of you can help me with my latest problem:
>
> I want to write a function that extends the behaviour of t.T.f and F,
> so that the character-search does not stop at the end of the current line.
>
> I just could not get it to work with the built in function search(),
> because in order to emulate t<char> and T<char>,
> I need to call /char/e-1, which I cant do using search().
>
> So far I tried:
>
> function! ExtendT(searchChar)
> " search does not accept the 'e-1':
> " search('/'.a:searchChar.'/e-1')
> " can't be passed as "flag" to search:
> " search(a:searchChar, "/e-1")
> " eval does not work:
> " eval '/'.a:searchChar.'/e-1'
> " exe doesn't work either:
> " execute '/'.a:searchChar.'/e-1'
> endfunction
>
> Anyway, I am unsure, if getting the above function to work and mapping
> it to e.g. t,
> this will work as a movement-command in Vim?
> So will I be able to do ct#
> on the following (cursor-position is indicated by *):
>
> This is l*ine one
> and I want to change until here #.
>
> Help will be much appreciated.
> Santa Claus says, he provides the one presenting a solution
> to this problem with a chocolate Vim-Statuette.
> ;-)
>
> Have a nice Christmas and a Happy new year!
> Kind regards!
> Asis

:call search('x')

will bring you to the next x

You could then use (untested)

:if col('.') == 1
: if line('.') != 1
: norm! k$
: endif
:else
: norm! h
:endif

if you wanted to go to the preceding character, wrapping to the previous
line if at the start of a line.

To map it to just ct# -- now, you can get that # as v:char in an :abbr
<expr> expression, but any of the following cannot be done while
evaluating the expression, only by "typing" the _result_ of the expression:

- changing the text
- switching to a different buffer
- the :normal command
and
- moving the cursor
is allowed, but the cursor will be returned once the expression has been
evaluated

so it is not as simple.

Maybe (untested)

function ToChar(char, fwd, exclusive)
call search(a:char, a:fwd ? "e" : "b")
if a:exclusive
if a:fwd
if col('.') == col('$')
if line('.') != line('$')
norm! j0
endif
else
norm! l
endif
else
if col('.') <= 1
if line('.') > 1
norm! k$
endif
else
norm! h
endif
endif
endif
endfunc
function GetUnmodChar()
let char = getchar()
while getcharmod()
let char = getchar()
endwhile
return char
endfunc

omap t :call ToChar(GetUnmodChar(),1,1)<CR>
omap T :call ToChar(GetUnmodChar(),0,1)<CR>
omap f :call ToChar(GetUnmodChar(),1,0)<CR>
omap F :call ToChar(GetUnmodChar(),0,0)<CR>

Best regards,
Tony.
--
"I don't care who does the electing as long as I get to do the
nominating"
-- Boss Tweed

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