* About the use of command handlers
@ 2020-05-29 4:29 Jairo A. del Rio
2020-05-29 7:55 ` Hans Hagen
0 siblings, 1 reply; 2+ messages in thread
From: Jairo A. del Rio @ 2020-05-29 4:29 UTC (permalink / raw)
To: mailing list for ConTeXt users
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Hello list! I was reading the following:
https://wiki.contextgarden.net/Style_Alternatives
I wanted to figure out how to make a simple module. However, there's a
point in the example below which I don't understand
% macros=mkvi
\startmodule[look]
\unprotect
\writestatus{loading}{ConTeXt User Module / look}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\installnamespace {look}
\installcommandhandler \????look {look} \????look
\appendtoks
\setuevalue{\currentlook}{\do_look{\currentlook}}
\to \everydefinelook
\unexpanded\def\do_look#id{%
\edef\currentlook{#id}%
\dosingleempty\do_do_look%
}
\def\do_do_look[#parms]#content{%
\begingroup
\iffirstargument\setupcurrentlook[#parms]\fi
%This handles style and color
\uselookstyleandcolor\c!style\c!color%
#content%
\endgroup%
}
\protect %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\stopmodule
What have I to do if, instead of "color" or "style", I want to use another
keyword, as "dummy" and get its value? Something like
\definelook[lol][dummy = blabla]
\lol{words}
%e.g. words \emph{blabla} or something similar
so "lol" is a word, a number or whatever. I've read something about command
handlers, but I'm having a hard time trying to understand them. Thank you
in advance!
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___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage : http://www.pragma-ade.nl / http://context.aanhet.net
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___________________________________________________________________________________
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: About the use of command handlers
2020-05-29 4:29 About the use of command handlers Jairo A. del Rio
@ 2020-05-29 7:55 ` Hans Hagen
0 siblings, 0 replies; 2+ messages in thread
From: Hans Hagen @ 2020-05-29 7:55 UTC (permalink / raw)
To: mailing list for ConTeXt users, Jairo A. del Rio
On 5/29/2020 6:29 AM, Jairo A. del Rio wrote:
> Hello list! I was reading the following:
>
> https://wiki.contextgarden.net/Style_Alternatives
>
> I wanted to figure out how to make a simple module. However, there's a
> point in the example below which I don't understand
>
> % macros=mkvi
> \startmodule[look]
> \unprotect
> \writestatus{loading}{ConTeXt User Module / look}
> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
> \installnamespace {look}
> \installcommandhandler \????look {look} \????look
>
> \appendtoks
> \setuevalue{\currentlook}{\do_look{\currentlook}}
> \to \everydefinelook
>
> \unexpanded\def\do_look#id{%
> \edef\currentlook{#id}%
> \dosingleempty\do_do_look%
> }
>
> \def\do_do_look[#parms]#content{%
> \begingroup
> \iffirstargument\setupcurrentlook[#parms]\fi
> %This handles style and color
> \uselookstyleandcolor\c!style\c!color%
> #content%
> \endgroup%
> }
>
> \protect %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
> \stopmodule
>
> What have I to do if, instead of "color" or "style", I want to use
> another keyword, as "dummy" and get its value? Something like
>
> \definelook[lol][dummy = blabla]
> \lol{words}
> %e.g. words \emph{blabla} or something similar
> so "lol" is a word, a number or whatever. I've read something about
> command handlers, but I'm having a hard time trying to understand them.
> Thank you in advance!
% macros=mkvi
\unprotect
\installnamespace {look}
\installcommandhandler \????look {look} \????look
\appendtoks
\setuevalue{\currentlook}{\module_look_do{\currentlook}}
\to \everydefinelook
\unexpanded\def\module_look_do#id%
{\edef\currentlook{#id}%
\dosingleempty\module_look_do_do}
\def\module_look_do_do[#parms]#content%
{\dontleavehmode
\begingroup
\iffirstargument
\setupcurrentlook[#parms]%
\fi
\doifsomething{\lookparameter{title}}
{\begingroup
\uselookstyleandcolor\c!headstyle\c!headcolor
\lookparameter{title}%
\lookparameter{separator}%
\endgroup}%
\uselookstyleandcolor\c!style\c!color
#content%
\endgroup}
\protect
\starttext
\setuplook[separator={: }]
\definelook[lol][color=red,headcolor=green]
\lol[title=blabla]{words}
\stoptext
-----------------------------------------------------------------
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage : http://www.pragma-ade.nl / http://context.aanhet.net
archive : https://bitbucket.org/phg/context-mirror/commits/
wiki : http://contextgarden.net
___________________________________________________________________________________
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