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How to register callbacks in lualatex

Luapath broke after upgrading miktexWhy does it take LuaLaTeX so long to load fonts and can I speed it up?Lualatex, Pdflatex fail with externalizeLualatex capacity exceeded with Gb's of free RAMError when compiling with lualatex file “ltluatex.tex”Missing number error when using the scrbook document class LuaLaTeXWhile compiling expl3-code.tex takes more time than the othersIncluded lilypond files being processed by lualatex can't contain % symbol commentsHow to use lua code from external file in lualatex?Install cryst font on macOS 10.14 for pdflatex and lualatex

2

Help me please,how i can register callbacks in lualatex. For example it need to me catch,when the page of my document started or ended and print number of this page*2. I found in luatex documentation only how to catch,when the end of the page,but it not works for me. Here is my code:

documentclass{article}

usepackage{luacode}

usepackage{polyglossia}

setmainlanguage[babelshorthands=true]{russian}

setmainfont{Times New Roman}

pagestyle{empty}

thispagestyle{empty}

begin{luacode}

function f()

tex.print("page "..thepage*2)

end

id,error=callback.register("finish_pdfpage",f)

tex.sprint(error," ",id)

end{luacode}

begin{document}

test

newpage

new test

end{document}

But when i compile this document in lualatex,i get errors:

C:/Program Files/MiKTeX 2.9/tex/latex/base/ltluatex.lua:109:

Module luatexbase Error: Attempt to use callback.register() directly

(luatexbase)             on input line 14



stack traceback:

        [C]: in function 'error'

        C:/Program Files/MiKTeX 2.9/tex/latex/base/ltluatex.lua:109: in function 'modu

le_error'

        C:/Program Files/MiKTeX 2.9/tex/latex/base/ltluatex.lua:116: in function 'luat

exbase_error'

        C:/Program Files/MiKTeX 2.9/tex/latex/base/ltluatex.lua:320: in function 'regi

ster'

        [directlua]:4: in main chunk.

luacode@dbg@exec ...code@maybe@printdbg {#1} #1 }



l.14 end{luacode}

?

Also help me please,how i can catch event,when new page started,to print,for example,number of this page*2 or simple number of this page. Thank everybody for help.

luatex

share|improve this question

edited yesterday

Phelype Oleinik

23.8k54587

asked yesterday

Aleksandr KozlovskiyAleksandr Kozlovskiy

211

New contributor

Aleksandr Kozlovskiy is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  the ltluatex code used by latex (based on an earlier luatexbase package) implements an allocation scheme for callbacks so different packages can access the callbacks without over-writing each other, but to make that work the primitive callback registration has to be hidden.
  
  – David Carlisle
  yesterday
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  you can use texdoc ltluatex to see the documentation latex lua interface. You register a callback with luatexbase.add_to_callback as shown in Ulrike's answer.
  
  – David Carlisle
  yesterday
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I tryed use texdoc ltluatex,but it give me some useful information about callbacks,but not so mutch about the tex functions and attributes of tex tables such as: tex.attribute tex.count tex.dimen tex.skip tex.toks etc,. It seems,that i must guess al this attributes. 😁
  
  – Aleksandr Kozlovskiy
  7 hours ago
  

  
  
  
  

add a comment | 

2

Help me please,how i can register callbacks in lualatex. For example it need to me catch,when the page of my document started or ended and print number of this page*2. I found in luatex documentation only how to catch,when the end of the page,but it not works for me. Here is my code:

documentclass{article}

usepackage{luacode}

usepackage{polyglossia}

setmainlanguage[babelshorthands=true]{russian}

setmainfont{Times New Roman}

pagestyle{empty}

thispagestyle{empty}

begin{luacode}

function f()

tex.print("page "..thepage*2)

end

id,error=callback.register("finish_pdfpage",f)

tex.sprint(error," ",id)

end{luacode}

begin{document}

test

newpage

new test

end{document}

But when i compile this document in lualatex,i get errors:

C:/Program Files/MiKTeX 2.9/tex/latex/base/ltluatex.lua:109:

Module luatexbase Error: Attempt to use callback.register() directly

(luatexbase)             on input line 14



stack traceback:

        [C]: in function 'error'

        C:/Program Files/MiKTeX 2.9/tex/latex/base/ltluatex.lua:109: in function 'modu

le_error'

        C:/Program Files/MiKTeX 2.9/tex/latex/base/ltluatex.lua:116: in function 'luat

exbase_error'

        C:/Program Files/MiKTeX 2.9/tex/latex/base/ltluatex.lua:320: in function 'regi

ster'

        [directlua]:4: in main chunk.

luacode@dbg@exec ...code@maybe@printdbg {#1} #1 }



l.14 end{luacode}

?

Also help me please,how i can catch event,when new page started,to print,for example,number of this page*2 or simple number of this page. Thank everybody for help.

luatex

share|improve this question

edited yesterday

Phelype Oleinik

23.8k54587

asked yesterday

Aleksandr KozlovskiyAleksandr Kozlovskiy

211

New contributor

Aleksandr Kozlovskiy is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  the ltluatex code used by latex (based on an earlier luatexbase package) implements an allocation scheme for callbacks so different packages can access the callbacks without over-writing each other, but to make that work the primitive callback registration has to be hidden.
  
  – David Carlisle
  yesterday
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  you can use texdoc ltluatex to see the documentation latex lua interface. You register a callback with luatexbase.add_to_callback as shown in Ulrike's answer.
  
  – David Carlisle
  yesterday
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I tryed use texdoc ltluatex,but it give me some useful information about callbacks,but not so mutch about the tex functions and attributes of tex tables such as: tex.attribute tex.count tex.dimen tex.skip tex.toks etc,. It seems,that i must guess al this attributes. 😁
  
  – Aleksandr Kozlovskiy
  7 hours ago
  

  
  
  
  

add a comment | 

Help me please,how i can register callbacks in lualatex. For example it need to me catch,when the page of my document started or ended and print number of this page*2. I found in luatex documentation only how to catch,when the end of the page,but it not works for me. Here is my code:

documentclass{article}

usepackage{luacode}

usepackage{polyglossia}

setmainlanguage[babelshorthands=true]{russian}

setmainfont{Times New Roman}

pagestyle{empty}

thispagestyle{empty}

begin{luacode}

function f()

tex.print("page "..thepage*2)

end

id,error=callback.register("finish_pdfpage",f)

tex.sprint(error," ",id)

end{luacode}

begin{document}

test

newpage

new test

end{document}

But when i compile this document in lualatex,i get errors:

C:/Program Files/MiKTeX 2.9/tex/latex/base/ltluatex.lua:109:

Module luatexbase Error: Attempt to use callback.register() directly

(luatexbase)             on input line 14



stack traceback:

        [C]: in function 'error'

        C:/Program Files/MiKTeX 2.9/tex/latex/base/ltluatex.lua:109: in function 'modu

le_error'

        C:/Program Files/MiKTeX 2.9/tex/latex/base/ltluatex.lua:116: in function 'luat

exbase_error'

        C:/Program Files/MiKTeX 2.9/tex/latex/base/ltluatex.lua:320: in function 'regi

ster'

        [directlua]:4: in main chunk.

luacode@dbg@exec ...code@maybe@printdbg {#1} #1 }



l.14 end{luacode}

?

Also help me please,how i can catch event,when new page started,to print,for example,number of this page*2 or simple number of this page. Thank everybody for help.

luatex

share|improve this question

edited yesterday

Phelype Oleinik

23.8k54587

asked yesterday

Aleksandr KozlovskiyAleksandr Kozlovskiy

211

New contributor

Aleksandr Kozlovskiy is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

documentclass{article}

usepackage{luacode}

usepackage{polyglossia}

setmainlanguage[babelshorthands=true]{russian}

setmainfont{Times New Roman}

pagestyle{empty}

thispagestyle{empty}

begin{luacode}

function f()

tex.print("page "..thepage*2)

end

id,error=callback.register("finish_pdfpage",f)

tex.sprint(error," ",id)

end{luacode}

begin{document}

test

newpage

new test

end{document}

C:/Program Files/MiKTeX 2.9/tex/latex/base/ltluatex.lua:109:

Module luatexbase Error: Attempt to use callback.register() directly

(luatexbase)             on input line 14



stack traceback:

        [C]: in function 'error'

        C:/Program Files/MiKTeX 2.9/tex/latex/base/ltluatex.lua:109: in function 'modu

le_error'

        C:/Program Files/MiKTeX 2.9/tex/latex/base/ltluatex.lua:116: in function 'luat

exbase_error'

        C:/Program Files/MiKTeX 2.9/tex/latex/base/ltluatex.lua:320: in function 'regi

ster'

        [directlua]:4: in main chunk.

luacode@dbg@exec ...code@maybe@printdbg {#1} #1 }



l.14 end{luacode}

?

share|improve this question

edited yesterday

Phelype Oleinik

23.8k54587

asked yesterday

Aleksandr KozlovskiyAleksandr Kozlovskiy

211

New contributor

Aleksandr Kozlovskiy is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this question

edited yesterday

Phelype Oleinik

23.8k54587

asked yesterday

Aleksandr KozlovskiyAleksandr Kozlovskiy

211

New contributor

Aleksandr Kozlovskiy is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

edited yesterday

Phelype Oleinik

23.8k54587

edited yesterday

Phelype Oleinik

23.8k54587

asked yesterday

Aleksandr KozlovskiyAleksandr Kozlovskiy

211

New contributor

Aleksandr Kozlovskiy is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked yesterday

Aleksandr KozlovskiyAleksandr Kozlovskiy

211

1 Answer
1

active

oldest

votes

4

You need to use luatexbase.add_to_callback. But you shouldn't try to print something in finish_pdfpage. Here an example that writes to the log:

documentclass{article}

usepackage{luacode}

usepackage{polyglossia}

setmainlanguage[babelshorthands=true]{russian}

setmainfont{Times New Roman}

pagestyle{empty}

thispagestyle{empty}

begin{luacode}

function f()

texio.write_nl("HELLO: page "..tex.count["c@page"]*2)

end

id,error=luatexbase.add_to_callback("finish_pdfpage",f,"finish")

end{luacode}

begin{document}

test

newpage

new test

end{document}

share|improve this answer

answered yesterday

Ulrike FischerUlrike Fischer

194k8302688

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Ok,now it print number of page,but it seems for me,that it print at the second page. How i can catch end of the page and print information about it and how i can catch a start of new page and print information about it and,if it possible,how i can get content only for this pages? It also not understandeble for ne,how i can get the name of callback,which call my function,because in future i want to use one function with several callbacks. Thanks very mutch everybody for the help.
  
  – Aleksandr Kozlovskiy
  6 hours ago
  

  
  
  
  

add a comment | 

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4

You need to use luatexbase.add_to_callback. But you shouldn't try to print something in finish_pdfpage. Here an example that writes to the log:

documentclass{article}

usepackage{luacode}

usepackage{polyglossia}

setmainlanguage[babelshorthands=true]{russian}

setmainfont{Times New Roman}

pagestyle{empty}

thispagestyle{empty}

begin{luacode}

function f()

texio.write_nl("HELLO: page "..tex.count["c@page"]*2)

end

id,error=luatexbase.add_to_callback("finish_pdfpage",f,"finish")

end{luacode}

begin{document}

test

newpage

new test

end{document}

share|improve this answer

answered yesterday

Ulrike FischerUlrike Fischer

194k8302688

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Ok,now it print number of page,but it seems for me,that it print at the second page. How i can catch end of the page and print information about it and how i can catch a start of new page and print information about it and,if it possible,how i can get content only for this pages? It also not understandeble for ne,how i can get the name of callback,which call my function,because in future i want to use one function with several callbacks. Thanks very mutch everybody for the help.
  
  – Aleksandr Kozlovskiy
  6 hours ago
  

  
  
  
  

add a comment | 

4

You need to use luatexbase.add_to_callback. But you shouldn't try to print something in finish_pdfpage. Here an example that writes to the log:

documentclass{article}

usepackage{luacode}

usepackage{polyglossia}

setmainlanguage[babelshorthands=true]{russian}

setmainfont{Times New Roman}

pagestyle{empty}

thispagestyle{empty}

begin{luacode}

function f()

texio.write_nl("HELLO: page "..tex.count["c@page"]*2)

end

id,error=luatexbase.add_to_callback("finish_pdfpage",f,"finish")

end{luacode}

begin{document}

test

newpage

new test

end{document}

share|improve this answer

answered yesterday

Ulrike FischerUlrike Fischer

194k8302688

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Ok,now it print number of page,but it seems for me,that it print at the second page. How i can catch end of the page and print information about it and how i can catch a start of new page and print information about it and,if it possible,how i can get content only for this pages? It also not understandeble for ne,how i can get the name of callback,which call my function,because in future i want to use one function with several callbacks. Thanks very mutch everybody for the help.
  
  – Aleksandr Kozlovskiy
  6 hours ago
  

  
  
  
  

add a comment | 

You need to use luatexbase.add_to_callback. But you shouldn't try to print something in finish_pdfpage. Here an example that writes to the log:

documentclass{article}

usepackage{luacode}

usepackage{polyglossia}

setmainlanguage[babelshorthands=true]{russian}

setmainfont{Times New Roman}

pagestyle{empty}

thispagestyle{empty}

begin{luacode}

function f()

texio.write_nl("HELLO: page "..tex.count["c@page"]*2)

end

id,error=luatexbase.add_to_callback("finish_pdfpage",f,"finish")

end{luacode}

begin{document}

test

newpage

new test

end{document}

share|improve this answer

answered yesterday

Ulrike FischerUlrike Fischer

194k8302688

documentclass{article}

usepackage{luacode}

usepackage{polyglossia}

setmainlanguage[babelshorthands=true]{russian}

setmainfont{Times New Roman}

pagestyle{empty}

thispagestyle{empty}

begin{luacode}

function f()

texio.write_nl("HELLO: page "..tex.count["c@page"]*2)

end

id,error=luatexbase.add_to_callback("finish_pdfpage",f,"finish")

end{luacode}

begin{document}

test

newpage

new test

end{document}

share|improve this answer

answered yesterday

Ulrike FischerUlrike Fischer

194k8302688

answered yesterday

Ulrike FischerUlrike Fischer

194k8302688

answered yesterday

Ulrike FischerUlrike Fischer

194k8302688