* cld questions
@ 2021-09-05 10:01 Henning Hraban Ramm via ntg-context
2021-09-05 11:01 ` Hans Hagen via ntg-context
0 siblings, 1 reply; 6+ messages in thread
From: Henning Hraban Ramm via ntg-context @ 2021-09-05 10:01 UTC (permalink / raw)
To: mailing list for ConTeXt users; +Cc: Henning Hraban Ramm
Hi again,
I’m converting a few macros into Lua (LMTX), but couldn’t find some answers in the docs:
* How translates \ifodd\realpageno ?
This doesn’t work:
if ((tex.getcount("realpageno") mod 2) == 1) then
a = 1
end
I found tex.ifodd but don’t know how to use it either.
* How to access my \def’d macros?
Is this supposed to work?:
TeX:
\def\Something{1cm}
Lua:
context.Something()
(It doesn’t in my case, but if it should, I can investigate.)
* TeX primitives
Is tex.strut and tex.par supposed to work? Or how should I access these?
* interface definitions:
Lua:
interfaces.implement {
name = "MyFun",
public = true,
--permanent = false, -- what does this mean?
arguments = { "string", "string", "string", "string" },
actions = function(reference, y, text, filename)
-- a lot
end,
}
TeX:
\MyFun{ref:some}{1cm}{bla}{hacker}
0) I don’t understand what “permanent” does and why I should maybe disable it. (cld-mkiv, p.146)
1) The parameter y is actually supposed to be a dimension, but if I declare it "dimen", ConTeXt says there wasn’t a number at "1cm".
Or is a measure like that not a dimension?
2) The original interface of \MyFun had two optional parameters. I couldn’t find how to do that with interfaces.implement.
cld-mkiv, p.151 (12.7) shows how to do lists or key=value, but not single optional args.
I’d be glad to get a few hints.
Hraban
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^ permalink raw reply [flat|nested] 6+ messages in thread* Re: cld questions
2021-09-05 10:01 cld questions Henning Hraban Ramm via ntg-context
@ 2021-09-05 11:01 ` Hans Hagen via ntg-context
2021-09-05 14:27 ` Henning Hraban Ramm via ntg-context
0 siblings, 1 reply; 6+ messages in thread
From: Hans Hagen via ntg-context @ 2021-09-05 11:01 UTC (permalink / raw)
To: mailing list for ConTeXt users; +Cc: Hans Hagen
On 9/5/2021 12:01 PM, Henning Hraban Ramm via ntg-context wrote:
> Hi again,
> I’m converting a few macros into Lua (LMTX), but couldn’t find some answers in the docs:
>
>
> * How translates \ifodd\realpageno ?
>
> This doesn’t work:
> if ((tex.getcount("realpageno") mod 2) == 1) then
> a = 1
> end
we're talking lua: 9 % 2 == 0
> TeX:
> \def\Something{1cm}
>
> Lua:
> context.Something()
yes (assuming you're in scope)
* TeX primitives
> Is tex.strut and tex.par supposed to work? Or how should I access these?
\strut is not is primitive
context.strut() and context.par() should just work
> 0) I don’t understand what “permanent” does and why I should maybe disable it. (cld-mkiv, p.146)
overload protection
\permanent\def\Whatever{?}
\overloadmode=0
%\overloadmode=3
%\overloadmode=4
\def\Whatever{!}
try 3 and 4 (actually, try to run your documents with overloadmode set
and you might see where you replace core macros)
%enabledirectives[overloadmode=warning]
\enabledirectives[overloadmode=error]
btw, you can temporary do
\pushoverloadmode
potentially risky definitions
\popoverloadmode
> 1) The parameter y is actually supposed to be a dimension, but if I declare it "dimen", ConTeXt says there wasn’t a number at "1cm".
> Or is a measure like that not a dimension?
if you want to use {} around it use "dimenargument"
> 2) The original interface of \MyFun had two optional parameters. I couldn’t find how to do that with interfaces.implement.
> cld-mkiv, p.151 (12.7) shows how to do lists or key=value, but not single optional args.
there is "optional"
and ... cld is not yet updated to lmtx in this respect so some newer
features are missing
Hans
-----------------------------------------------------------------
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------
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^ permalink raw reply [flat|nested] 6+ messages in thread* Re: cld questions
2021-09-05 11:01 ` Hans Hagen via ntg-context
@ 2021-09-05 14:27 ` Henning Hraban Ramm via ntg-context
2021-09-06 16:20 ` Henning Hraban Ramm via ntg-context
0 siblings, 1 reply; 6+ messages in thread
From: Henning Hraban Ramm via ntg-context @ 2021-09-05 14:27 UTC (permalink / raw)
To: mailing list for ConTeXt users; +Cc: Henning Hraban Ramm
> Am 05.09.2021 um 13:01 schrieb Hans Hagen <j.hagen@xs4all.nl>:
>
> On 9/5/2021 12:01 PM, Henning Hraban Ramm via ntg-context wrote:
>> * How translates \ifodd\realpageno ?
>> This doesn’t work:
>> if ((tex.getcount("realpageno") mod 2) == 1) then
>> a = 1
>> end
>
> we're talking lua: 9 % 2 == 0
Oops. Too many languages...
>> TeX:
>> \def\Something{1cm}
>> Lua:
>> context.Something()
>
> yes (assuming you're in scope)
Then I’m out of scope.
\def is in my environment, directly before I load the Lua functions with \loadluafile.
How can I access the macros from the environment there?
>> Is tex.strut and tex.par supposed to work? Or how should I access these?
>
> \strut is not is primitive
>
> context.strut() and context.par() should just work
It does. I thought I had tried that...
> 0) I don’t understand what “permanent” does and why I should maybe disable it. (cld-mkiv, p.146)
>
> overload protection
>
> \permanent\def\Whatever{?}
> \overloadmode=0
> %\overloadmode=3
> %\overloadmode=4
> \def\Whatever{!}
>
> try 3 and 4 (actually, try to run your documents with overloadmode set and you might see where you replace core macros)
>
> %enabledirectives[overloadmode=warning]
> \enabledirectives[overloadmode=error]
>
> btw, you can temporary do
>
> \pushoverloadmode
> potentially risky definitions
> \popoverloadmode
Thank you, I’ll try. (While I’m quite sure I never overload core macros.)
>> 1) The parameter y is actually supposed to be a dimension, but if I declare it "dimen", ConTeXt says there wasn’t a number at "1cm".
>> Or is a measure like that not a dimension?
>
> if you want to use {} around it use "dimenargument"
>
>> 2) The original interface of \MyFun had two optional parameters. I couldn’t find how to do that with interfaces.implement.
>> cld-mkiv, p.151 (12.7) shows how to do lists or key=value, but not single optional args.
>
> there is "optional"
>
> and ... cld is not yet updated to lmtx in this respect so some newer features are missing
Thank you!
Must I then declare "string optional" etc.?
Hraban
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___________________________________________________________________________________
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: cld questions
2021-09-05 14:27 ` Henning Hraban Ramm via ntg-context
@ 2021-09-06 16:20 ` Henning Hraban Ramm via ntg-context
2021-09-06 18:00 ` Hans Hagen via ntg-context
0 siblings, 1 reply; 6+ messages in thread
From: Henning Hraban Ramm via ntg-context @ 2021-09-06 16:20 UTC (permalink / raw)
To: mailing list for ConTeXt users; +Cc: Henning Hraban Ramm
Another question:
I think I understood the need for function arguments.
My macro, defined with interfaces.implement, works while I call "Image" below,
but if I call "ClippedImage" (one level of indirection more), I get:
"""
tex error > tex error on line 28 in file virtual://page.nopage.1: Missing { inserted
...(no helpful output here)...
A left brace was mandatory here, so I've put one in.
"""
I can’t imagine where to put that brace.
function Image(Width, Height, filename)
context.externalfigure(
{ filename },
{
width = todimen(Width),
}
)
end
function ClippedImage(Width, Height, filename)
context.clip(
{
width = todimen(Width),
height = todimen(Height),
},
Image(Width, Height, filename)
)
end
Am 05.09.2021 um 16:27 schrieb Henning Hraban Ramm via ntg-context <ntg-context@ntg.nl>:
>> TeX:
>> \def\Something{1cm}
>> Lua:
>> context.Something()
>
> yes (assuming you're in scope)
Then I’m out of scope.
\def is in my environment, directly before I load the Lua functions with \loadluafile.
How can I access the macros from the environment there?
>> 2) The original interface of \MyFun had two optional parameters. I couldn’t find how to do that with interfaces.implement.
>> cld-mkiv, p.151 (12.7) shows how to do lists or key=value, but not single optional args.
>
> there is "optional"
>
> and ... cld is not yet updated to lmtx in this respect so some newer features are missing
Must I then declare "string optional" etc.?
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!
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___________________________________________________________________________________
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: cld questions
2021-09-06 16:20 ` Henning Hraban Ramm via ntg-context
@ 2021-09-06 18:00 ` Hans Hagen via ntg-context
2021-09-06 19:16 ` Henning Hraban Ramm via ntg-context
0 siblings, 1 reply; 6+ messages in thread
From: Hans Hagen via ntg-context @ 2021-09-06 18:00 UTC (permalink / raw)
To: mailing list for ConTeXt users; +Cc: Hans Hagen
On 9/6/2021 6:20 PM, Henning Hraban Ramm via ntg-context wrote:
> Another question:
>
> I think I understood the need for function arguments.
> My macro, defined with interfaces.implement, works while I call "Image" below,
> but if I call "ClippedImage" (one level of indirection more), I get:
>
> """
> tex error > tex error on line 28 in file virtual://page.nopage.1: Missing { inserted
> ...(no helpful output here)...
> A left brace was mandatory here, so I've put one in.
> """
>
> I can’t imagine where to put that brace.
>
>
>
> function Image(Width, Height, filename)
> context.externalfigure(
> { filename },
> {
> width = todimen(Width),
> }
> )
> end
>
> function ClippedImage(Width, Height, filename)
> context.clip(
> {
> width = todimen(Width),
> height = todimen(Height),
> },
> Image(Width, Height, filename)
function() Image(Width, Height, filename) end
> )
> end
>
>
>
> Am 05.09.2021 um 16:27 schrieb Henning Hraban Ramm via ntg-context <ntg-context@ntg.nl>:
>
>>> TeX:
>>> \def\Something{1cm}
>>> Lua:
>>> context.Something()
>>
>> yes (assuming you're in scope)
>
> Then I’m out of scope.
>
> \def is in my environment, directly before I load the Lua functions with \loadluafile.
> How can I access the macros from the environment there?
>
>
>>> 2) The original interface of \MyFun had two optional parameters. I couldn’t find how to do that with interfaces.implement.
>>> cld-mkiv, p.151 (12.7) shows how to do lists or key=value, but not single optional args.
>>
>> there is "optional"
>>
>> and ... cld is not yet updated to lmtx in this respect so some newer features are missing
>
> Must I then declare "string optional" etc.?
>
> ___________________________________________________________________________________
> 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
> ___________________________________________________________________________________
>
--
-----------------------------------------------------------------
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
___________________________________________________________________________________
^ permalink raw reply [flat|nested] 6+ messages in thread
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2021-09-06 16:20 ` Henning Hraban Ramm via ntg-context
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