Creating TeX dimensions and counters registers directly in Lua
Hello all, Is it possible to create a new dimension ConTeXt register directly in Lua, or I have to first create the ConTeXt dimensional register and then to subsequently assign it a value? Here is example: \starttext \newdimen\mydimension \directlua{tex.setdimen("mydimension", 123)} \stoptext works fine, but all like: \starttext \directlua{tex.print([[\newdimen\myotherdimension]])} \directlua{tex.setdimen("myotherdimension", 123)} \directlua{tex.newdimen("myotherdimension")} etc... \stoptext fails. In addition, I am interested in whether directly in Lua to create a new counter as in the previous. \starttext \newcount\mycount \directlua{ tex.setcount("mycount",125) } again works, but anything like: \starttext \directlua{tex.print([[\newcount\myothercount]])} \directlua{tex.newcount("myothercount")} etc... \stoptext again fails... Is there any source or examples to study anything about it? Thanx Jaroslav
Am 22.08.2012 um 09:19 schrieb Jaroslav Hajtmar
Hello all, Is it possible to create a new dimension ConTeXt register directly in Lua, or I have to first create the ConTeXt dimensional register and then to subsequently assign it a value?
Here is example:
\starttext \newdimen\mydimension \directlua{tex.setdimen("mydimension", 123)} \stoptext
works fine, but all like:
\starttext \directlua{tex.print([[\newdimen\myotherdimension]])} \directlua{tex.setdimen("myotherdimension", 123)} \directlua{tex.newdimen("myotherdimension")}
etc...
\stoptext
fails.
In addition, I am interested in whether directly in Lua to create a new counter as in the previous.
\starttext \newcount\mycount \directlua{ tex.setcount("mycount",125) }
again works, but anything like:
\starttext \directlua{tex.print([[\newcount\myothercount]])} \directlua{tex.newcount("myothercount")} etc...
\stoptext
again fails...
Is there any source or examples to study anything about it?
AFAIK there is no tex.setdimen but what’s the problem to use Lua tables to save the values. \starttext \ctxlua{mydimension = number.topoints(10000)} \ctxlua{context(mydimension)} \blank \ctxlua{myotherdimension = 123456} \ctxlua{context(number.tocentimeters(myotherdimension))} \stoptext Wolfgang
Thanks Wolfgang for the reply, but I must have misunderstood. My point is, that TeX registers was subsequently visible and usable in TeX (eg for width or height of boxes, etc.) Eg. for example, \the\mydimension can see that this does not occur! In addition, I solve the problem at LuaTEX, so ConTeXt converting functions do not work etc. .. Thanx Jaroslav Here is another example: \starttext \newdimen\mytexdimension \mytexdimension=100pt \ctxlua{myluadimension = number.topoints(10000)} \ctxlua{context(myluadimension)} \the\mytexdimension \hbox to\mytexdimension{XXXXX}YYYY % FAILS %\the\myluadimension %\hbox to\myluadimension{XXXXX}YYYY \stoptext Dne 22.8.2012 9:43, Wolfgang Schuster napsal(a):
\starttext
\ctxlua{mydimension = number.topoints(10000)} \ctxlua{context(mydimension)}
\blank
\ctxlua{myotherdimension = 123456} \ctxlua{context(number.tocentimeters(myotherdimension))}
\stoptext
On 22-8-2012 11:09, Jaroslav Hajtmar wrote:
Thanks Wolfgang for the reply, but I must have misunderstood. My point is, that TeX registers was subsequently visible and usable in TeX (eg for width or height of boxes, etc.)
Eg. for example, \the\mydimension can see that this does not occur! In addition, I solve the problem at LuaTEX, so ConTeXt converting functions do not work etc. ..
Thanx Jaroslav
Here is another example:
\starttext
\newdimen\mytexdimension \mytexdimension=100pt
\ctxlua{myluadimension = number.topoints(10000)} \ctxlua{context(myluadimension)}
\the\mytexdimension \hbox to\mytexdimension{XXXXX}YYYY
% FAILS %\the\myluadimension %\hbox to\myluadimension{XXXXX}YYYY
Of course that fails: why should the globally defined lua variable "myluadimension" magically become a \dimen register at the tex end? And believe it or not, the context conversion function do work, else mkiv wouldn't work.
\stoptext
Here is the right code: \starttext \newdimen\mytexdimension \mytexdimension 100pt \ruledhbox to\mytexdimension{\the\mytexdimension} \ctxlua{document.myluadimension = "200pt"} \ruledhbox to \cldcontext{document.myluadimension}{\cldcontext{document.myluadimension}} \ctxlua{tex.dimen.mytexdimension = "300pt"} \ruledhbox to\mytexdimension{\the\mytexdimension} \stoptext ----------------------------------------------------------------- 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 -----------------------------------------------------------------
Thank to Hans and Peter too. It works in context fine now. I would like realize this same in pure LuaTeX. I was primarily in the query for it to find Lua equivalent of TeX primitives \newdimen and \newcount (for direct creating new TeX registers) I could use something like "\directlua{tex.newdimen.mydimen}" that would create TeX register "mydimen" and then \directlua{tex.dimen.mydimen=200*2^16} which set value of register and that should be present in TeX for direct use such as "\the\mydimen" etc. I apologize for my naivete :-). Of course, I did not think that the global variable is magically changed the registry value, I just did not know how to implement it. Plus, I had in mind that ConTeXt conversion functions do not work in a clean LuaTEX (without reading about some library functions). One more thanx. Jaroslav Here is my pure luatex example. Is there any easy way? \newdimen\mytexdimension \mytexdimension 100pt mytexdimension: .\hbox to\mytexdimension{\the\mytexdimension}. \directlua{tex.myluadimension = "200pt"} myluadimension: .\hbox to \directlua{tex.print(tex.myluadimension)}{\directlua{tex.print(tex.myluadimension)}}. \directlua{tex.dimen.mytexdimension = "300pt"} mytexdimension: .\hbox to\mytexdimension{\the\mytexdimension}. \def\myluadimension{\directlua{tex.print(tex.myluadimension)}} myluadimension: .\hbox to\myluadimension{\myluadimension}. \bye Dne 22.8.2012 12:32, Hans Hagen napsal(a):
On 22-8-2012 11:09, Jaroslav Hajtmar wrote:
Thanks Wolfgang for the reply, but I must have misunderstood. My point is, that TeX registers was subsequently visible and usable in TeX (eg for width or height of boxes, etc.)
Eg. for example, \the\mydimension can see that this does not occur! In addition, I solve the problem at LuaTEX, so ConTeXt converting functions do not work etc. ..
Thanx Jaroslav
Here is another example:
\starttext
\newdimen\mytexdimension \mytexdimension=100pt
\ctxlua{myluadimension = number.topoints(10000)} \ctxlua{context(myluadimension)}
\the\mytexdimension \hbox to\mytexdimension{XXXXX}YYYY
% FAILS %\the\myluadimension %\hbox to\myluadimension{XXXXX}YYYY
Of course that fails: why should the globally defined lua variable "myluadimension" magically become a \dimen register at the tex end? And believe it or not, the context conversion function do work, else mkiv wouldn't work.
\stoptext
Here is the right code:
\starttext
\newdimen\mytexdimension \mytexdimension 100pt
\ruledhbox to\mytexdimension{\the\mytexdimension}
\ctxlua{document.myluadimension = "200pt"}
\ruledhbox to \cldcontext{document.myluadimension}{\cldcontext{document.myluadimension}}
\ctxlua{tex.dimen.mytexdimension = "300pt"}
\ruledhbox to\mytexdimension{\the\mytexdimension}
\stoptext
----------------------------------------------------------------- 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 -----------------------------------------------------------------
On 22-8-2012 13:24, Jaroslav Hajtmar wrote:
Thank to Hans and Peter too. It works in context fine now. I would like realize this same in pure LuaTeX.
I was primarily in the query for it to find Lua equivalent of TeX primitives \newdimen and \newcount (for direct creating new TeX registers) I could use something like "\directlua{tex.newdimen.mydimen}" that would create TeX register "mydimen" and then \directlua{tex.dimen.mydimen=200*2^16} which set value of register and that should be present in TeX for direct use such as "\the\mydimen" etc. I apologize for my naivete :-).
Just do: tex.dimen[20001] = "100pt" at the lau end and at the tex end: \dimen20001=100pt keep in mind that \newdimen is just an allocator that associates a \cs and the implementation of that is pretty macro package dependent! Starting at 20000 makes sure that you have no clash with existing registers.
Of course, I did not think that the global variable is magically changed the registry value, I just did not know how to implement it. Plus, I had in mind that ConTeXt conversion functions do not work in a clean LuaTEX (without reading about some library functions).
Ok, but keep in mind that clean luatex does not exist. As soon as one starts doing things at the lua end that reflects on the tex end, you have a dependency. I will add a context.newdimen function so that one can do: \startluacode document.mydimen = context.newdimen("MyDimen") tex.dimen[document.mydimen] = "10pt" \stopluacode \the\MyDimen \MyDimen=100pt \the\MyDimen \startluacode context(number.points(tex.dimen[document.mydimen])) \stopluacode Posting the implemenation makes no sense as it refers to low level context properties that users should not be troubled with. PS. From the context point of view I see no advantages of using plain. First of all, one can still do pretty plain things in context. Hans ----------------------------------------------------------------- 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 -----------------------------------------------------------------
Great!!! Thanx very much Hans... Normally I do all things in ConTeXt, but I am preparing a beginning tutorial for users of LaTeX and PlainTeX, who would be interested in getting to know the basics LuaTEX. Therefore I am seeking a solution applicable in LuaLaTeX and LuaPlain too. Jaroslav Hajtmar Dne 22.8.2012 14:12, Hans Hagen napsal(a):
On 22-8-2012 13:24, Jaroslav Hajtmar wrote:
Thank to Hans and Peter too. It works in context fine now. I would like realize this same in pure LuaTeX.
I was primarily in the query for it to find Lua equivalent of TeX primitives \newdimen and \newcount (for direct creating new TeX registers) I could use something like "\directlua{tex.newdimen.mydimen}" that would create TeX register "mydimen" and then \directlua{tex.dimen.mydimen=200*2^16} which set value of register and that should be present in TeX for direct use such as "\the\mydimen" etc. I apologize for my naivete :-).
Just do:
tex.dimen[20001] = "100pt"
at the lau end and at the tex end:
\dimen20001=100pt
keep in mind that \newdimen is just an allocator that associates a \cs and the implementation of that is pretty macro package dependent! Starting at 20000 makes sure that you have no clash with existing registers.
Of course, I did not think that the global variable is magically changed the registry value, I just did not know how to implement it. Plus, I had in mind that ConTeXt conversion functions do not work in a clean LuaTEX (without reading about some library functions).
Ok, but keep in mind that clean luatex does not exist. As soon as one starts doing things at the lua end that reflects on the tex end, you have a dependency.
I will add a context.newdimen function so that one can do:
\startluacode
document.mydimen = context.newdimen("MyDimen")
tex.dimen[document.mydimen] = "10pt"
\stopluacode
\the\MyDimen
\MyDimen=100pt
\the\MyDimen
\startluacode context(number.points(tex.dimen[document.mydimen])) \stopluacode
Posting the implemenation makes no sense as it refers to low level context properties that users should not be troubled with.
PS. From the context point of view I see no advantages of using plain. First of all, one can still do pretty plain things in context.
Hans
----------------------------------------------------------------- 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 -----------------------------------------------------------------
participants (4)
-
Hans Hagen -
Jaroslav Hajtmar -
Peter Münster -
Wolfgang Schuster