Extended numbering patterns using the CSS Counter Styles specification, along with a number of Ready-made Counter Styles.
Usage
// numberingx is expected to be imported with the syntax creating a named module
#import "@preview/numberingx:0.0.1"
// Use full-width roman numerals for titles, and lowercase ukrainian letters
#set heading(numbering: numberingx.formatter(
"{fullwidth-upper-roman}.{fullwidth-lower-roman}.{lower-ukrainian}"
))
Patterns
numberingx’s patterns are similiar to typst’s numbering patterns and use the same notion of fragments with a prefix and a final suffix. The main difference is that it doesn’t use special characters and all numbering styles must be written within braces. To insert a literal brace, you can double it.
A list of patterns can be found in the Ready-made Counter Styles document. Additionally, numberingx allows typst’s numbering characters to be used in patterns. This way, "{upper-roman}.{decimal})" can be shortened to "{I}.{1})".
API
numberingx exposes two functions, formatand formatter.
format(fmt, styles: (:), ..nums)
This function uses the same api as typst’s numbering() and takes the pattern string as its first positional argument, and numbers as trailing arguments. An optional styles argument allows for user-defined styles.
formatter(fmt, styles: (:))
This function is little more than a shorter version of format.with(..). It takes a pattern string and an optional styles argument, and return the matching numbering functions. This is mainly intended to be used for #set rules.
User-defined styles
Custom styles can be defined according to the CSS Counter Styles spec and passed through a styles named argument to format and formatter. It must be a dictionary mapping style names to style descriptions.
Note that the prefix, suffix, pad, and speak-as descriptors are not supported, nor is the extends system.
License
This repository is licensed under MIT-0, which is the closest I’m legally allowed to public domain while being OSI approved.