"Trial typesetting" in ConTeXt / lua ?

"Trial typesetting" in ConTeXt / lua ?

[josephcanedo]

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Dear all,


Is it possible in ConTeXt within lua code to do “trial typesetting” (not sure that’s best name for what I would like to achieve) ? By this I mean store some input (with text and macros) in some buffer and do what ConTeXt does normally (parsing, create nodes …) but instead of shipping the nodes to line breaking algorithm and to the page output, only retrieve the nodes and after discard them. This is to get an estimate of the total text width within a paragraph (to calculate some shape on the paragraph).


I browsed the lua code from http://source.contextgarden.net/ but I do not dare to use too low level lua functionality.


Many thanks for any hint (even a pointer to lua function).


Best regards


Joseph Canedo

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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/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: "Trial typesetting" in ConTeXt / lua ?

[josephcanedo]

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Hello,




I was wondering if someone could have some hints on this question, anyway, I found the function mknodes() from luaTeX wiki and nodes.handlers.characters(head) function in ConTeXt (as it seems that node.ligaturing(head) and node.kerning(head) do not seem to do anything).


It seems to work fine (ligatures and font features) expect the kerning. Does someone know how to perform the kerning as well ?




Best regards


Joseph Canedo






From: josephcanedo@gmail.com
Sent: ‎Saturday‎, ‎November‎ ‎14‎, ‎2015 ‎11‎:‎16‎ ‎AM
To: ntg-context@ntg.nl





Dear all,




Is it possible in ConTeXt within lua code to do “trial typesetting” (not sure that’s best name for what I would like to achieve) ? By this I mean store some input (with text and macros) in some buffer and do what ConTeXt does normally (parsing, create nodes …) but instead of shipping the nodes to line breaking algorithm and to the page output, only retrieve the nodes and after discard them. This is to get an estimate of the total text width within a paragraph (to calculate some shape on the paragraph).




I browsed the lua code from http://source.contextgarden.net/ but I do not dare to use too low level lua functionality.




Many thanks for any hint (even a pointer to lua function).




Best regards




Joseph Canedo

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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/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: "Trial typesetting" in ConTeXt / lua ?

[josephcanedo]

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Just in case it is of interest (and assuming this won’t change in future versions), after digging again in lua code I replaced nodes.handlers.characters(head) with


local proc = nodes.tasks.actions('processors') -- not sure finalizers tasks are needed ?
head = proc(head)




before passing returned head to linebreak:


local vbox, info = tex.linebreak(head, {})


node.write(vbox)


and it shows kern in ouput, apparently identical to vanilla typesetting.


Joseph





From: josephcanedo@gmail.com
Sent: ‎Tuesday‎, ‎November‎ ‎17‎, ‎2015 ‎9‎:‎15‎ ‎AM
To: ntg-context@ntg.nl





Hello,




I was wondering if someone could have some hints on this question, anyway, I found the function mknodes() from luaTeX wiki and nodes.handlers.characters(head) function in ConTeXt (as it seems that node.ligaturing(head) and node.kerning(head) do not seem to do anything).




It seems to work fine (ligatures and font features) expect the kerning. Does someone know how to perform the kerning as well ?




Best regards




Joseph Canedo






From: josephcanedo@gmail.com
Sent: ‎Saturday‎, ‎November‎ ‎14‎, ‎2015 ‎11‎:‎16‎ ‎AM
To: ntg-context@ntg.nl





Dear all,




Is it possible in ConTeXt within lua code to do “trial typesetting” (not sure that’s best name for what I would like to achieve) ? By this I mean store some input (with text and macros) in some buffer and do what ConTeXt does normally (parsing, create nodes …) but instead of shipping the nodes to line breaking algorithm and to the page output, only retrieve the nodes and after discard them. This is to get an estimate of the total text width within a paragraph (to calculate some shape on the paragraph).




I browsed the lua code from http://source.contextgarden.net/ but I do not dare to use too low level lua functionality.




Many thanks for any hint (even a pointer to lua function).




Best regards




Joseph Canedo

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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/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: "Trial typesetting" in ConTeXt / lua ?

[Hans Hagen]

On 11/17/2015 9:15 AM, josephcanedo@gmail.com wrote:
> Hello,
>
> I was wondering if someone could have some hints on this question,
> anyway, I found the function mknodes() from luaTeX wiki and
> nodes.handlers.characters(head) function in ConTeXt (as it seems that
> node.ligaturing(head) and node.kerning(head) do not seem to do anything).
>
> It seems to work fine (ligatures and font features) expect the kerning.
> Does someone know how to perform the kerning as well ?

I'm not sure if i understand your issue.

traditional ligaturing and kerning is applied when a node list has fonts 
using basemode

\starttext

\startluacode

     local hbox = nodes.typesetters.hpack("Hello World!")

     context("%p",hbox.width)

     nodes.flush_list(hbox)

\stopluacode

\stoptext


> Best regards
>
> Joseph Canedo
>
> *From:* josephcanedo@gmail.com <mailto:josephcanedo@gmail.com>
> *Sent:* ‎Saturday‎, ‎November‎ ‎14‎, ‎2015 ‎11‎:‎16‎ ‎AM
> *To:* ntg-context@ntg.nl <mailto:ntg-context@ntg.nl>
>
> Dear all,
>
> Is it possible in ConTeXt within lua code to do “trial typesetting” (not
> sure that’s best name for what I would like to achieve) ? By this I mean
> store some input (with text and macros) in some buffer and do what
> ConTeXt does normally (parsing, create nodes …) but instead of shipping
> the nodes to line breaking algorithm and to the page output, only
> retrieve the nodes and after discard them. This is to get an estimate of
> the total text width within a paragraph (to calculate some shape on the
> paragraph).

you can assemble a list of characters and then do an hpack on them

> I browsed the lua code from http://source.contextgarden.net/
> <http://source.contextgarden.net/tex/context/base/node-ref.lua?search=nodecodes> but
> I do not dare to use too low level lua functionality.
>
> Many thanks for any hint (even a pointer to lua function).
>
> Best regards
>
> Joseph Canedo
>
>
>
>
> ___________________________________________________________________________________
> 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
> ___________________________________________________________________________________
>


-- 

-----------------------------------------------------------------
                                           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
-----------------------------------------------------------------
___________________________________________________________________________________
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: "Trial typesetting" in ConTeXt / lua ?

[josephcanedo]

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Hi Hans


First of all, thanks a lot for replying.


I tried your suggestion and it does not seem to work at least for fancy features in EB Garamond (historical liguratures and other features).

I also tried to pass the hbox to tex.linebreak() and got assertion failure in luatex. 


Is there any code snippet available to show the full process in lua code (I mean up to shipping the result nodes to the page) ?


To give some background, I’d like to compute a parshape for some paragraphs for which I’d like some special shape. I thought that one idea was to build up the lua nodes from text (which has some occasional words with  smaller or different font style), compute the width of text to figure out a first guess for parshape and then iterate on linebreak with different parshape settings to refine the first guess.


Thanks a lot,


Best regards


Joseph





From: Hans Hagen
Sent: ‎Wednesday‎, ‎November‎ ‎18‎, ‎2015 ‎2‎:‎46‎ ‎AM
To: ntg-context@ntg.nl





On 11/17/2015 9:15 AM, josephcanedo@gmail.com wrote:
> Hello,
>
> I was wondering if someone could have some hints on this question,
> anyway, I found the function mknodes() from luaTeX wiki and
> nodes.handlers.characters(head) function in ConTeXt (as it seems that
> node.ligaturing(head) and node.kerning(head) do not seem to do anything).
>
> It seems to work fine (ligatures and font features) expect the kerning.
> Does someone know how to perform the kerning as well ?

I'm not sure if i understand your issue.

traditional ligaturing and kerning is applied when a node list has fonts 
using basemode

\starttext

\startluacode

     local hbox = nodes.typesetters.hpack("Hello World!")

     context("%p",hbox.width)

     nodes.flush_list(hbox)

\stopluacode

\stoptext


> Best regards
>
> Joseph Canedo
>
> *From:* josephcanedo@gmail.com <mailto:josephcanedo@gmail.com>
> *Sent:* ‎Saturday‎, ‎November‎ ‎14‎, ‎2015 ‎11‎:‎16‎ ‎AM
> *To:* ntg-context@ntg.nl <mailto:ntg-context@ntg.nl>
>
> Dear all,
>
> Is it possible in ConTeXt within lua code to do “trial typesetting” (not
> sure that’s best name for what I would like to achieve) ? By this I mean
> store some input (with text and macros) in some buffer and do what
> ConTeXt does normally (parsing, create nodes …) but instead of shipping
> the nodes to line breaking algorithm and to the page output, only
> retrieve the nodes and after discard them. This is to get an estimate of
> the total text width within a paragraph (to calculate some shape on the
> paragraph).

you can assemble a list of characters and then do an hpack on them

> I browsed the lua code from http://source.contextgarden.net/
> <http://source.contextgarden.net/tex/context/base/node-ref.lua?search=nodecodes> but
> I do not dare to use too low level lua functionality.
>
> Many thanks for any hint (even a pointer to lua function).
>
> Best regards
>
> Joseph Canedo
>
>
>
>
> ___________________________________________________________________________________
> 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
> ___________________________________________________________________________________
>


-- 

-----------------------------------------------------------------
                                           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
-----------------------------------------------------------------
___________________________________________________________________________________
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
___________________________________________________________________________________

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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/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: "Trial typesetting" in ConTeXt / lua ?

[Hans Hagen]

On 11/18/2015 9:49 PM, josephcanedo@gmail.com wrote:
> Hi Hans
>
> First of all, thanks a lot for replying.
>
> I tried your suggestion and it does not seem to work at least for fancy
> features in EB Garamond (historical liguratures and other features).
> I also tried to pass the hbox to tex.linebreak() and got assertion
> failure in luatex.

are you sure that you defined that font and that it's the current font?

> Is there any code snippet available to show the full process in lua code
> (I mean up to shipping the result nodes to the page) ?

no ... thousands of lines spread over many files

> To give some background, I’d like to compute a parshape for some
> paragraphs for which I’d like some special shape. I thought that one
> idea was to build up the lua nodes from text (which has some occasional
> words with  smaller or different font style), compute the width of text
> to figure out a first guess for parshape and then iterate on linebreak
> with different parshape settings to refine the first guess.

just put stuff in vboxes and loop over that; at the tex end with calls 
to lua

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
-----------------------------------------------------------------
___________________________________________________________________________________
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: "Trial typesetting" in ConTeXt / lua ?

[josephcanedo]

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> are you sure that you defined that font and that it's the current font?

I’ll double check my code and may I send you a MWE if I can still not see the ligatures and stuff. I’ll try also with new beta (have not installed yet)  just in case.


> just put stuff in vboxes and loop over that; at the tex end with calls to lua



Not sure I follow what you mean, sorry about this. I am quite a newbie in ConTeXt and in TeX more generally.


Thanks


Joseph





From: Hans Hagen
Sent: ‎Wednesday‎, ‎November‎ ‎18‎, ‎2015 ‎10‎:‎22‎ ‎PM
To: ntg-context@ntg.nl





On 11/18/2015 9:49 PM, josephcanedo@gmail.com wrote:
> Hi Hans
>
> First of all, thanks a lot for replying.
>
> I tried your suggestion and it does not seem to work at least for fancy
> features in EB Garamond (historical liguratures and other features).
> I also tried to pass the hbox to tex.linebreak() and got assertion
> failure in luatex.

are you sure that you defined that font and that it's the current font?

> Is there any code snippet available to show the full process in lua code
> (I mean up to shipping the result nodes to the page) ?

no ... thousands of lines spread over many files

> To give some background, I’d like to compute a parshape for some
> paragraphs for which I’d like some special shape. I thought that one
> idea was to build up the lua nodes from text (which has some occasional
> words with  smaller or different font style), compute the width of text
> to figure out a first guess for parshape and then iterate on linebreak
> with different parshape settings to refine the first guess.

just put stuff in vboxes and loop over that; at the tex end with calls 
to lua

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
-----------------------------------------------------------------
___________________________________________________________________________________
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
___________________________________________________________________________________

[-- Attachment #1.2: Type: text/html, Size: 5332 bytes --]

[-- Attachment #2: Type: text/plain, Size: 485 bytes --]

___________________________________________________________________________________
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: "Trial typesetting" in ConTeXt / lua ?

[josephcanedo]

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Attached simple MWE. The second line has no ligatures/ no glyph substitution/ kern


Using: ConTeXt  ver: 2015.10.09 21:28 MKIV beta  fmt: 2015.11.1


Thanks


Best regards


Joseph





From: josephcanedo@gmail.com
Sent: ‎Wednesday‎, ‎November‎ ‎18‎, ‎2015 ‎10‎:‎36‎ ‎PM
To: ntg-context@ntg.nl





> are you sure that you defined that font and that it's the current font?

I’ll double check my code and may I send you a MWE if I can still not see the ligatures and stuff. I’ll try also with new beta (have not installed yet)  just in case.




> just put stuff in vboxes and loop over that; at the tex end with calls to lua



Not sure I follow what you mean, sorry about this. I am quite a newbie in ConTeXt and in TeX more generally.




Thanks




Joseph





From: Hans Hagen
Sent: ‎Wednesday‎, ‎November‎ ‎18‎, ‎2015 ‎10‎:‎22‎ ‎PM
To: ntg-context@ntg.nl





On 11/18/2015 9:49 PM, josephcanedo@gmail.com wrote:
> Hi Hans
>
> First of all, thanks a lot for replying.
>
> I tried your suggestion and it does not seem to work at least for fancy
> features in EB Garamond (historical liguratures and other features).
> I also tried to pass the hbox to tex.linebreak() and got assertion
> failure in luatex.

are you sure that you defined that font and that it's the current font?

> Is there any code snippet available to show the full process in lua code
> (I mean up to shipping the result nodes to the page) ?

no ... thousands of lines spread over many files

> To give some background, I’d like to compute a parshape for some
> paragraphs for which I’d like some special shape. I thought that one
> idea was to build up the lua nodes from text (which has some occasional
> words with  smaller or different font style), compute the width of text
> to figure out a first guess for parshape and then iterate on linebreak
> with different parshape settings to refine the first guess.

just put stuff in vboxes and loop over that; at the tex end with calls 
to lua

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
-----------------------------------------------------------------
___________________________________________________________________________________
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
___________________________________________________________________________________

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[-- Attachment #2: hpack_mwe.tex --]
[-- Type: application/octet-stream, Size: 713 bytes --]

\definefontfeature[base][
  mode=node, ccmp=yes, calt=yes,
  liga=yes, dlig=yes, hlig=yes,
  kern=yes, mark=yes, mkmk=yes,
  onum=yes, pnum=yes, salt=yes,
  script=latn,
  dlig=yes, cv91=yes]

\definefontfeature[xvicentury][
  ss02=yes, cv01=yes, cv03=yes]

\definefontfamily[mainfont][serif][EBGaramond][features={base, xvicentury}]
\setupbodyfont[mainfont, 9pt]

\startluacode

local function typeset(text)

    local head = nodes.typesetters.hpack(text)

    node.write(head)

end

userdata = userdata or {}

userdata.typeset = typeset

\stopluacode

\define[1]\TTS{\ctxlua{userdata.typeset([[#1]])}}

\showfontkerns

\starttext

faict insist session univers.

\TTS{faict insist session univers.

}

\stoptext

[-- Attachment #3: hpack_mwe.pdf --]
[-- Type: application/pdf, Size: 8981 bytes --]

[-- Attachment #4: Type: text/plain, Size: 485 bytes --]

___________________________________________________________________________________
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: "Trial typesetting" in ConTeXt / lua ?

[Hans Hagen]

On 11/19/2015 5:16 PM, josephcanedo@gmail.com wrote:
> Attached simple MWE. The second line has no ligatures/ no glyph
> substitution/ kern

use this ...

\startluacode
     userdata = userdata or { }

     if not nodes.typesetters.tohbox then
         function nodes.typesetters.tohbox(...)
             local list = nodes.typesetters.tonodes(...)
             local head = nodes.processors.hpack_filter(list)
             local hbox = node.hpack(head)
             return hbox
         end
     end

     function userdata.typeset(text)
         node.write((nodes.typesetters.tohbox(text)))
     end

\stopluacode

i'll add tohbox to the core


-----------------------------------------------------------------
                                           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
-----------------------------------------------------------------
___________________________________________________________________________________
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: "Trial typesetting" in ConTeXt / lua ?

[josephcanedo]

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I’ll try this in a minute. Thanks a million. 

Another bit of complexity, if I have some words in different font (only a few of them), should I call tohbox for these separately and “chain” the different hboxes together ? For example the idea is to “emulate” for instance: 


The second line has a word typeset in {\tfx smaller } size.


Thanks a lot again for your help,


Best regards,


Joseph





From: Hans Hagen
Sent: ‎Thursday‎, ‎November‎ ‎19‎, ‎2015 ‎8‎:‎11‎ ‎PM
To: ntg-context@ntg.nl





On 11/19/2015 5:16 PM, josephcanedo@gmail.com wrote:
> Attached simple MWE. The second line has no ligatures/ no glyph
> substitution/ kern

use this ...

\startluacode
     userdata = userdata or { }

     if not nodes.typesetters.tohbox then
         function nodes.typesetters.tohbox(...)
             local list = nodes.typesetters.tonodes(...)
             local head = nodes.processors.hpack_filter(list)
             local hbox = node.hpack(head)
             return hbox
         end
     end

     function userdata.typeset(text)
         node.write((nodes.typesetters.tohbox(text)))
     end

\stopluacode

i'll add tohbox to the core


-----------------------------------------------------------------
                                           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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maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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Re: "Trial typesetting" in ConTeXt / lua ?

[Hans Hagen]

On 11/19/2015 8:26 PM, josephcanedo@gmail.com wrote:
> I’ll try this in a minute. Thanks a million.
> Another bit of complexity, if I have some words in different font (only
> a few of them), should I call tohbox for these separately and “chain”
> the different hboxes together ? For example the idea is to “emulate” for
> instance:
>
> The second line has a word typeset in {\tfx smaller } size.

the string is not interpreted

why not put the content it in a box ?

\setbox0\hbox{....}

you can then use the list at he lua end with tex.box[0]

> Thanks a lot again for your help,
>
> Best regards,
>
> Joseph
>
> *From:* Hans Hagen <mailto:pragma@wxs.nl>
> *Sent:* ‎Thursday‎, ‎November‎ ‎19‎, ‎2015 ‎8‎:‎11‎ ‎PM
> *To:* ntg-context@ntg.nl <mailto:ntg-context@ntg.nl>
>
> On 11/19/2015 5:16 PM, josephcanedo@gmail.com wrote:
>  > Attached simple MWE. The second line has no ligatures/ no glyph
>  > substitution/ kern
>
> use this ...
>
> \startluacode
>       userdata = userdata or { }
>
>       if not nodes.typesetters.tohbox then
>           function nodes.typesetters.tohbox(...)
>               local list = nodes.typesetters.tonodes(...)
>               local head = nodes.processors.hpack_filter(list)
>               local hbox = node.hpack(head)
>               return hbox
>           end
>       end
>
>       function userdata.typeset(text)
>           node.write((nodes.typesetters.tohbox(text)))
>       end
>
> \stopluacode
>
> i'll add tohbox to the core
>
>
> -----------------------------------------------------------------
>                                             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
> -----------------------------------------------------------------
> ___________________________________________________________________________________
> 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
> ___________________________________________________________________________________
>
>
> ___________________________________________________________________________________
> 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
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> archive  : http://foundry.supelec.fr/projects/contextrev/
> wiki     : http://contextgarden.net
> ___________________________________________________________________________________
>


-- 

-----------------------------------------------------------------
                                           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
-----------------------------------------------------------------
___________________________________________________________________________________
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
___________________________________________________________________________________