[NTG-context] conversion from realpage to pagenumber

[NTG-context] conversion from realpage to pagenumber

[mf]

Hello list,

how do I convert the realpage number to a page number?

Suppose you have a document with a frontmatter of 20 pages in roman 
numerals, followed by the main text starting from page 1 in arabic numerals.

So the twelfth page is 'XII', while the twenty-second is '2'.

How do I get 'XII' from 12 and '2' from 22?

Massi
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[NTG-context] Re: conversion from realpage to pagenumber

[Wolfgang Schuster]

mf schrieb am 12.01.2024 um 10:18:
> Hello list,
>
> how do I convert the realpage number to a page number?
>
> Suppose you have a document with a frontmatter of 20 pages in roman 
> numerals, followed by the main text starting from page 1 in arabic 
> numerals.
>
> So the twelfth page is 'XII', while the twenty-second is '2'.
>
> How do I get 'XII' from 12 and '2' from 22?

\defineconversionset
   [frontpart:pagenumber] [] [romannumerals]

\setuppagenumber
   [way=byblock]

% Alternative method for "way=byblock" when you have an appendix where
% the pagenumber of the bodypart continues rather than being reset
%
% \startsectionblockenvironment[bodypart]
%   \resetuserpagenumber
% \stopsectionblockenvironment

\starttext

\startfrontmatter
\dorecurse{20}{\samplefile{lorem}\page}
\stopfrontmatter

\startbodymatter
\dorecurse{20}{\samplefile{lorem}\page}
\stopbodymatter

\stoptext

Wolfgang

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[NTG-context] Re: conversion from realpage to pagenumber

[mf]

Thank you Wolfgang,

but my problem is getting back the page of the document starting from a 
"realpage" value picked from structures.registers.collected in the .tuc 
file.

Anyway, looking at the .tuc file produced by your example, I found that 
structures.pages.collected has all the information I need to reconstruct 
the printed page number.

Here's an excerpt of the .tuc file:

utilitydata.structures.pages.collected={
  {
   ["block"]="frontpart",
   ["number"]=1,
   ["numberdata"]=1,
   ["prefixdata"]=2,
   ["state"]="start",
  },
  {
   ["block"]="frontpart",
   ["number"]=2,
   ["numberdata"]=1,
   ["prefixdata"]=2,
   ["state"]="start",
  },
...

  {
   ["block"]="bodypart",
   ["number"]=1,
   ["numberdata"]=1,
   ["prefixdata"]=2,
   ["state"]="start",
  },
  {
   ["block"]="bodypart",
   ["number"]=2,
   ["numberdata"]=1,
   ["prefixdata"]=2,
   ["state"]="start",
  },
...

So your answer was not the solution, but it's been the way to the solution.

Thank you again,

Massi


Il 12/01/24 12:02, Wolfgang Schuster ha scritto:
> mf schrieb am 12.01.2024 um 10:18:
>> Hello list,
>>
>> how do I convert the realpage number to a page number?
>>
>> Suppose you have a document with a frontmatter of 20 pages in roman 
>> numerals, followed by the main text starting from page 1 in arabic 
>> numerals.
>>
>> So the twelfth page is 'XII', while the twenty-second is '2'.
>>
>> How do I get 'XII' from 12 and '2' from 22?
>
> \defineconversionset
>   [frontpart:pagenumber] [] [romannumerals]
>
> \setuppagenumber
>   [way=byblock]
>
> % Alternative method for "way=byblock" when you have an appendix where
> % the pagenumber of the bodypart continues rather than being reset
> %
> % \startsectionblockenvironment[bodypart]
> %   \resetuserpagenumber
> % \stopsectionblockenvironment
>
> \starttext
>
> \startfrontmatter
> \dorecurse{20}{\samplefile{lorem}\page}
> \stopfrontmatter
>
> \startbodymatter
> \dorecurse{20}{\samplefile{lorem}\page}
> \stopbodymatter
>
> \stoptext
>
> Wolfgang
>
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[NTG-context] Re: conversion from realpage to pagenumber

[mf]

Il 12/01/24 10:39, Henning Hraban Ramm ha scritto:
> Am 12.01.24 um 10:18 schrieb mf:
>> Hello list,
>>
>> how do I convert the realpage number to a page number?
>>
>> Suppose you have a document with a frontmatter of 20 pages in roman 
>> numerals, followed by the main text starting from page 1 in arabic 
>> numerals.
>>
>> So the twelfth page is 'XII', while the twenty-second is '2'.
>>
>> How do I get 'XII' from 12 and '2' from 22?
> 
> try \realpagenumber
> 

The right one would be \userpagenumber, but it works only with the 
current page.

The code for registers does that translation -- from an arbitrary 
realpage of your document to the corresponding user page number, with 
the right formatting -- but I could not find the code that does that in 
strc-reg.* source files.

Massi
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