[NTG-context] Fully object-oriented section

[NTG-context] Fully object-oriented section

[Giuseppe Bilotta]

Hello,

I'd like to restart the thread about "object-orienting" section
commands. Availability of \startpart ... \stoppart, \startchapter
...\stopchapter (alongside the faster \part, \chapter ...
alternatives) becomes more and more a need for me. Having the
mechanism standardized in ConTeXt would be a great thing.

This is the way I'm implementing it by hand:

%D New structured sectioning

\newtoks\everybeforestartpart
\newtoks\everyafterstartpart
\newtoks\everystoppart
\def\startpart{\dosingleempty\dostartpart}
\def\dostartpart[#1]#2{%
  \bgroup\bgroup
    \the\everybeforestartpart
    \iffirstargument
       \part[#1]{#2}%
    \else
       \part{#2}%
    \fi
  \egroup
  \the\everyafterstartpart
}
\def\stoppart{\the\everystoppart\egroup}


Using this snippet as the kernel and simply changing "part" to
whatever other sectioning level is needed is enough to allow full
customization of the sectioning levels. Can this be put in
ConTeXt?

-- 
Giuseppe "Oblomov" Bilotta

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Re: [NTG-context] Fully object-oriented section

[Giuseppe Bilotta]

Thursday, October 17, 2002 Giuseppe Bilotta wrote:

GB> %D New structured sectioning

GB> \newtoks\everybeforestartpart
GB> \newtoks\everyafterstartpart
GB> \newtoks\everystoppart
GB> \def\startpart{\dosingleempty\dostartpart}
GB> \def\dostartpart[#1]#2{%
GB>   \bgroup\bgroup
GB>     \the\everybeforestartpart
GB>     \iffirstargument
GB>        \part[#1]{#2}%
GB>     \else
GB>        \part{#2}%
GB>     \fi
GB>   \egroup
GB>   \the\everyafterstartpart
GB> }
GB> \def\stoppart{\the\everystoppart\egroup}

Sorry for following up to myself. After a few tries, I discovered
that it's much better without the inner grouping:

\newtoks\everybeforestartpart
\newtoks\everyafterstartpart
\newtoks\everystoppart
\def\startpart{\dosingleempty\dostartpart}
\def\dostartpart[#1]#2{%
  \bgroup
    \the\everybeforestartpart
    \iffirstargument
       \part[#1]{#2}%
    \else
       \part{#2}%
    \fi
  \egroup
  \the\everyafterstartpart
}
\def\stoppart{\the\everystoppart}

-- 
Giuseppe "Oblomov" Bilotta

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Re: [NTG-context] Fully object-oriented section

[Simon Pepping]

On Thu, Oct 17, 2002 at 11:27:14PM +0200, Giuseppe Bilotta wrote:
> 
> Sorry for following up to myself. After a few tries, I discovered
> that it's much better without the inner grouping:
> 
> \newtoks\everybeforestartpart
> \newtoks\everyafterstartpart
> \newtoks\everystoppart
> \def\startpart{\dosingleempty\dostartpart}
> \def\dostartpart[#1]#2{%
>   \bgroup
>     \the\everybeforestartpart
>     \iffirstargument
>        \part[#1]{#2}%
>     \else
>        \part{#2}%
>     \fi
>   \egroup
>   \the\everyafterstartpart
> }
> \def\stoppart{\the\everystoppart}

This is without the outer grouping. I think the outer grouping is
necessary; when I use \start \stop commands I expect them to make a
group.

Could not you do without the if statement?

\def\dostartpart[#1]#2{%
  \bgroup
    \the\everybeforestartpart
    \part[#1]{#2}%
    \the\everyafterstartpart
}
\def\stoppart{\the\everystoppart\egroup}


-- 
Simon Pepping
email: spepping@scaprea.hobby.nl

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Re[2]: [NTG-context] Fully object-oriented section

[Giuseppe Bilotta]

Friday, October 18, 2002 Simon Pepping wrote:

SP> This is without the outer grouping. I think the outer grouping is
SP> necessary; when I use \start \stop commands I expect them to make a
SP> group.

Right indeed.

SP> Could not you do without the if statement?

SP> \def\dostartpart[#1]#2{%
SP>   \bgroup
SP>     \the\everybeforestartpart
SP>     \part[#1]{#2}%
SP>     \the\everyafterstartpart
SP> }
SP> \def\stoppart{\the\everystoppart\egroup}

I'm not sure if this works. I've had problems with some arguments
which behave differently depending on whether the argumet is not
there or is empty, so I prefer to keep on the safe side.

-- 
Giuseppe "Oblomov" Bilotta

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