Re: luatex feature question/request

["luigi scarso" <luigi.scarso@gmail.com>]

On Fri, Apr 4, 2008 at 10:52 AM, Taco Hoekwater <taco@elvenkind.com> wrote:
>
>
>  luigi scarso wrote:
>  >>  There actually is a way to modify the input lines just before they
>  >>  are parsed by luatex, but that is really only suitable for converting
>  >>  8-bit encodings to utf-8. (I was going to post an example abusing
>  >>  that method, but there are way many things that can go wrong, so I
>  >>  changed my mind)
>  > Post it anyway.
>  > We are all adults.
>
>  If you say so ...
>
>    % engine=luatex
>
>    \startluacode
>    function add_ties (line) return line:gsub(' ','~') end
>    \stopluacode
>
>    \def\startfiltered
>      {\ctxlua {callback.register('process_input_buffer', add_ties)}}
>    \def\stopfiltered
>      {\ctxlua {callback.register('process_input_buffer', nil)}}
>
>    \starttext
>    \startfiltered
>    Thus, I came to the conclusion that the designer of a new system
>    must not only be the implementer and first large||scale user; the
>    designer should also write the first user manual.
>    \stopfiltered
>    \stoptext
>
>  Notice how it breaks only at hyphens? If you think that is because
>  those are the only valid breakpoints, you are actually slightly wrong:
>  there are still 'normal' spaces between 'system' and 'must' and between
>  'the' and 'designer' (because EOL is converted to a space *after*
>  reading in the line buffer).
>
>  The lua function is _much_ too simple. It will happily convert '\ '
>  into '\~', $a = 2~$ into $a~=~2~$, and "\TEX is" into "\TEX~is".

ok, many thanks.


-- 
luigi
it's new .
it's powerful .
it's luatex .
http://www.luatex.org
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