Re: [NTG-context] Modules, namespaces, Luacode etc..
Thanx Wolfgang
puzzle starts to fit itself ...
Jarda
Dne 30.9.2010 20:53, Wolfgang Schuster napsal(a):
Am 30.09.2010 um 20:40 schrieb Jaroslav Hajtmar:
Hello my wise masters of the Force and teachers of Jedi...
It seems that my first module (SCANCSV of scancsv.lua library of CTM in
Brejlov) work without any visible errors (without
documentation and with a junkyard yet), but I'm not sure whether is there a
hidden problem or future collisions. Therefore I have a few of questions for
modules namespaces, luacode namespaces etc. I want to ask how relates a
namespace ConTeXt module with
namespace of Lua code, which is listed within this module and others questions.
1. Is the namespace of Lua code independent of the namespace module?
Yes.
2. If are ConTeXt macros defined in the module, are automatically in its
namespace?
No, the namespace in a module is only for keys and key-value-lists. When you
write a command with the same name as a core command the core definition is
overwritten and lost.
3. Can both namespaces (module and Luacode) somehow connected?
You can try to use the same namespace in TeX and Lua but thats up to you.
4. What happens when I have two macros with the same name in two different
modules?
The last definition is the current meaning of the command, e.g. in this example
the command \befehl has the content “Befehl” because it’s the last defintion.
\def\befehl{command} % \befehl has not the content “command”
\def\befehl{Befehl} % \befehl has now the content “Befehl” and the content of
the first definition is lost
5. Can I call the macros of the same names in different namespaces (diferent
modules)?
When you call them inside of a environment it’s possible.
\def\startenvone{\bgroup\def\befehl{command}}
\def\stopenvone {\egroup}
\def\startenvtwo{\bgroup\def\befehl{befehl}}
\def\stopenvtwo {\egroup}
\starttext
\startenvone \befehl \stopenvone % \befehl == “command”
\startenvtwo \befehl \stopenvtwo % \befehl == “befehl”
\stoptext
6. Can I read about somewhere more?
- The programming pages on the wiki.
- A book about plain TeX {e.g. The TeXbook, TeX by Topic, TeX for the Impatient
etc.)
7. I enclose below a minimal example of the module (I do not know why there are
some things) to comment or write yours comments and suggestions, etc.
Give me some time to write a detailed description of the \definenamespace
command.
Wolfgang
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[NTG-context] Modules, namespaces, Luacode etc..
Hello my wise masters of the Force and teachers of Jedi...
It seems that my first module (SCANCSV of scancsv.lua library of CTM in
Brejlov) work without any visible errors (without
documentation and with a junkyard yet), but I'm not sure whether is there a
hidden problem or future collisions. Therefore I have a few of questions
for
modules namespaces, luacode namespaces etc. I want to ask how relates a
namespace ConTeXt module with
namespace of Lua code, which is listed within this module and others
questions.
1. Is the namespace of Lua code independent of the namespace module?
2. If are ConTeXt macros defined in the module, are automatically in its
namespace?
3. Can both namespaces (module and Luacode) somehow connected?
4. What happens when I have two macros with the same name in two
different modules?
5. Can I call the macros of the same names in different namespaces
(diferent modules)?
6. Can I read about somewhere more?
7. I enclose below a minimal example of the module (I do not know why
there are some things) to comment or write yours comments and
suggestions, etc.
I'd like to start with something simpler, but this is the reality of our
Empire
Thanks everyone for the advice or recommendations for the study.
Greetings
Jarda Hajtmar
My minimal example ..
% ** BEGIN MODULE
**
%D \module
%D [ file=t-moduleexample,
%D version=2010.09.27,
%Dtitle=\CONTEXT\ User Module,
%D subtitle=Module example,
%D author=Author Name,
%D date=\currentdate,
%Dcopyright=Copyright,
%Demail=mailaddr...@domain.com,
%D license=Public Domain]
%D \section{Title}
%D This is modul is intended for ...
%D The following option are availabe:
%D
%S B
%S Everything onwards is
%S skipped and does not
%S appear in the PDF.
%S E
\writestatus{loading}{ConTeXt User Module / Module example}
\unprotect
\startinterface all
\setinterfacevariable {moduleexample} {moduleexample}
\stopinterface
\definenamespace
[moduleexample]
[type=module,
comment=Module example,
version=1,
name=moduleexample,
style=yes,
command=yes,
setup=list,
parent=moduleexample]
\startluacode
thirddata = thirddata or { }
thirddata.moduleexample = {
gVar1='', -- comment
gVar2='y', -- comment
-- etc...
}
function thirddata.moduleexample.myfirstfunction(parameter)
local locvar=parameter
tex.print(Input parameter : ..locvar)
thirddata.moduleexample.gVar1=locvar
return locvar
end
function thirddata.moduleexample.mysecondfunction()
tex.print(Output parameter: ..thirddata.moduleexample.gVar1)
end
\stopluacode
\def\myfirstmodulemacro#1{\ctxlua{thirddata.moduleexample.myfirstfunction(#1)}}
\def\mysecondmodulemacro{\ctxlua{thirddata.moduleexample.mysecondfunction()}}
\protect \endinput
% ** END MODULE
**
% ** BEGIN USING MODULE
**
\usemodule[t-moduleexample]
\starttext
\myfirstmodulemacro{Hello World!}
\mysecondmodulemacro
\stoptext
% ** END USING MODULE
**
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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://tex.aanhet.net
archive : http://foundry.supelec.fr/projects/contextrev/
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Re: [NTG-context] Modules, namespaces, Luacode etc..
Am 30.09.2010 um 20:40 schrieb Jaroslav Hajtmar:
Hello my wise masters of the Force and teachers of Jedi...
It seems that my first module (SCANCSV of scancsv.lua library of CTM in
Brejlov) work without any visible errors (without
documentation and with a junkyard yet), but I'm not sure whether is there a
hidden problem or future collisions. Therefore I have a few of questions for
modules namespaces, luacode namespaces etc. I want to ask how relates a
namespace ConTeXt module with
namespace of Lua code, which is listed within this module and others
questions.
1. Is the namespace of Lua code independent of the namespace module?
Yes.
2. If are ConTeXt macros defined in the module, are automatically in its
namespace?
No, the namespace in a module is only for keys and key-value-lists. When you
write a command with the same name as a core command the core definition is
overwritten and lost.
3. Can both namespaces (module and Luacode) somehow connected?
You can try to use the same namespace in TeX and Lua but thats up to you.
4. What happens when I have two macros with the same name in two different
modules?
The last definition is the current meaning of the command, e.g. in this example
the command \befehl has the content “Befehl” because it’s the last defintion.
\def\befehl{command} % \befehl has not the content “command”
\def\befehl{Befehl} % \befehl has now the content “Befehl” and the content of
the first definition is lost
5. Can I call the macros of the same names in different namespaces (diferent
modules)?
When you call them inside of a environment it’s possible.
\def\startenvone{\bgroup\def\befehl{command}}
\def\stopenvone {\egroup}
\def\startenvtwo{\bgroup\def\befehl{befehl}}
\def\stopenvtwo {\egroup}
\starttext
\startenvone \befehl \stopenvone % \befehl == “command”
\startenvtwo \befehl \stopenvtwo % \befehl == “befehl”
\stoptext
6. Can I read about somewhere more?
- The programming pages on the wiki.
- A book about plain TeX {e.g. The TeXbook, TeX by Topic, TeX for the Impatient
etc.)
7. I enclose below a minimal example of the module (I do not know why there
are some things) to comment or write yours comments and suggestions, etc.
Give me some time to write a detailed description of the \definenamespace
command.
Wolfgang
___
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://tex.aanhet.net
archive : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___
