36 lines
832 B
JavaScript
36 lines
832 B
JavaScript
|
/**
|
||
|
|
* @typedef {import('micromark-util-types').Code} Code
|
||
|
|
*/
|
||
|
|
|
||
|
|
import {
|
||
|
|
markdownLineEndingOrSpace,
|
||
|
|
unicodePunctuation,
|
||
|
|
unicodeWhitespace
|
||
|
|
} from 'micromark-util-character'
|
||
|
|
/**
|
||
|
|
* Classify whether a code represents whitespace, punctuation, or something
|
||
|
|
* else.
|
||
|
|
*
|
||
|
|
* Used for attention (emphasis, strong), whose sequences can open or close
|
||
|
|
* based on the class of surrounding characters.
|
||
|
|
*
|
||
|
|
* > 👉 **Note**: eof (`null`) is seen as whitespace.
|
||
|
|
*
|
||
|
|
* @param {Code} code
|
||
|
|
* Code.
|
||
|
|
* @returns {typeof constants.characterGroupWhitespace | typeof constants.characterGroupPunctuation | undefined}
|
||
|
|
* Group.
|
||
|
|
*/
|
||
|
|
export function classifyCharacter(code) {
|
||
|
|
if (
|
||
|
|
code === null ||
|
||
|
|
markdownLineEndingOrSpace(code) ||
|
||
|
|
unicodeWhitespace(code)
|
||
|
|
) {
|
||
|
|
return 1
|
||
|
|
}
|
||
|
|
if (unicodePunctuation(code)) {
|
||
|
|
return 2
|
||
|
|
}
|
||
|
|
}
|