Re: [NTG-context] Problem calling Lua during \startsetups
Thank you, Wolfgang, this works better. Actually I need to use '%' in the condition and that fails: --- ... \startrawsetups layer % The value of 'n' is used here to set the appropriate background, % = n-th page of a PDF, and also to draw a filled rectangle on % the left or right side (depending on whether n is even or odd) % The code bellow fails \startluacode print(N=, n) if n % 2 == 1 then else end \stopluacode \stoprawsetups ... --- with: --- ! LuaTeX error main ctx instance:1: 'then' expected near 'else'. --- So like '%' was still treated as TeX comment char. How to enable '%'? Best regards, Lukas NB: Dirty trick: to define a Lua function like 'function isEven(n) return n % 2 == 0 end' and to use this function at the place of 'n % 2 == 1'; but I'd rather avoid this. -- Ing. Lukáš Procházka [mailto:l...@pontex.cz] Pontex s. r. o. [mailto:pon...@pontex.cz] [http://www.pontex.cz] Bezová 1658 147 14 Praha 4 Tel: +420 244 062 238 Fax: +420 244 461 038 ___ 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 ___
Re: [NTG-context] Problem calling Lua during \startsetups
On 25-1-2011 8:44, Wolfgang Schuster wrote:
\startsetups layer
% In my real code (= not in this example)
% the value of 'n' is used here to set the appropriate background,
% = n-th page of a PDF, and also to draw a filled rectangle on
% the left or right side (depending on whether n is even or odd)
% The code bellow fails [1]
\startluacode
print(N=, n)
if n == 2 then
else
end
\stopluacode
\stopsetups
\startluasetups layer
\stopluasetups
\luasetup{...}
-
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
| www.pragma-pod.nl
-
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Re: [NTG-context] Problem calling Lua during \startsetups
Am 25.01.2011 um 09:00 schrieb Procházka Lukáš Ing. - Pontex s. r. o.:
Thank you, Wolfgang, this works better.
Actually I need to use '%' in the condition and that fails:
---
...
\startrawsetups layer
% The value of 'n' is used here to set the appropriate background,
% = n-th page of a PDF, and also to draw a filled rectangle on
% the left or right side (depending on whether n is even or odd)
% The code bellow fails
\startluacode
print(N=, n)
if n % 2 == 1 then
else
end
\stopluacode
\stoprawsetups
...
---
with:
---
! LuaTeX error main ctx instance:1: 'then' expected near 'else'.
---
So like '%' was still treated as TeX comment char.
How to enable '%'?
You can’t use % in the luacode environment when you write it inside
of another environment because TeX can change the meaning of % but
this should works (untested):
\startbuffer[lualayer]
% …
\startluacode
…
\stopluacode
\stopbuffer
\doifmode{foo}{\ctxluabuffer[lualayer]}
Wolfgang
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Re: [NTG-context] Problem calling Lua during \startsetups
Thanks you, Hans, -
On Tue, 25 Jan 2011 09:33:04 +0100, Hans Hagen pra...@wxs.nl wrote:
On 25-1-2011 8:44, Wolfgang Schuster wrote:
\startsetups layer
% In my real code (= not in this example)
% the value of 'n' is used here to set the appropriate background,
% = n-th page of a PDF, and also to draw a filled rectangle on
% the left or right side (depending on whether n is even or odd)
% The code bellow fails [1]
\startluacode
print(N=, n)
if n == 2 then
else
end
\stopluacode
\stopsetups
\startluasetups layer
\stopluasetups
- I guess to be used like:
\startluasetups layer
\startluacode
...
\stopluacode
\stopluasetups
\luasetup{...}
To be used how? This way?
\setupbackgrounds[page][setups=\luasetup{layer},background={T}]
Best regards,
Lukas
--
Ing. Lukáš Procházka [mailto:l...@pontex.cz]
Pontex s. r. o. [mailto:pon...@pontex.cz] [http://www.pontex.cz]
Bezová 1658
147 14 Praha 4
Tel: +420 244 062 238
Fax: +420 244 461 038
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[NTG-context] Problem calling Lua during \startsetups
Hello,
I encountered a bit weird thing when I used Lua in \startsetup:
---
\definelayer[T][x=0mm,y=0mm,width=\paperwidth,height=\paperheight]
\directlua{n, m = 1, 11} % Initialization
\startsetups layer
% In my real code (= not in this example)
% the value of 'n' is used here to set the appropriate background,
% = n-th page of a PDF, and also to draw a filled rectangle on
% the left or right side (depending on whether n is even or odd)
% The code bellow fails [1]
\startluacode
print(N=, n)
if n == 2 then
else
end
\stopluacode
\stopsetups
\setupbackgrounds[page][setups=layer,background={T}]
\starttext
% The code bellow works well [2]
\startluacode
print(M=, m)
if m == 2 then
else
end
\stopluacode
\dorecurse{4}{\page[empty]}
\stoptext
---
The problem is that Lua code between \startsetups ... \stopsetups [1] seems to be
parsed another way than when in [2].
The [1] gives the following error message:
---
! LuaTeX error main ctx instance:1: 'then' expected near 'thenelseend'.
---
So it seems like spaces and/or \ns were ignored.
If you commented [1], the section [2] would work well.
So how to use make Lua work well even between \startsetups ... \stopsetups?
Best regards,
Lukas
--
Ing. Lukáš Procházka [mailto:l...@pontex.cz]
Pontex s. r. o. [mailto:pon...@pontex.cz] [http://www.pontex.cz]
Bezová 1658
147 14 Praha 4
Tel: +420 244 062 238
Fax: +420 244 461 038
t-Bkg.log
Description: Binary data
t-Bkg.mkiv
Description: Binary data
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Re: [NTG-context] Problem calling Lua during \startsetups
Am 25.01.2011 um 08:33 schrieb Procházka Lukáš Ing. - Pontex s. r. o.:
Hello,
I encountered a bit weird thing when I used Lua in \startsetup:
---
\definelayer[T][x=0mm,y=0mm,width=\paperwidth,height=\paperheight]
\directlua{n, m = 1, 11} % Initialization
\startsetups layer
% In my real code (= not in this example)
% the value of 'n' is used here to set the appropriate background,
% = n-th page of a PDF, and also to draw a filled rectangle on
% the left or right side (depending on whether n is even or odd)
% The code bellow fails [1]
\startluacode
print(N=, n)
if n == 2 then
else
end
\stopluacode
\stopsetups
\setupbackgrounds[page][setups=layer,background={T}]
\starttext
% The code bellow works well [2]
\startluacode
print(M=, m)
if m == 2 then
else
end
\stopluacode
\dorecurse{4}{\page[empty]}
\stoptext
---
The problem is that Lua code between \startsetups ... \stopsetups [1] seems
to be parsed another way than when in [2].
The [1] gives the following error message:
---
! LuaTeX error main ctx instance:1: 'then' expected near 'thenelseend'.
---
So it seems like spaces and/or \ns were ignored.
If you commented [1], the section [2] would work well.
So how to use make Lua work well even between \startsetups ... \stopsetups?
Use \startrawsetups … \stoprawsetups.
Wolfgang
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