81 lines
2 KiB
JavaScript
81 lines
2 KiB
JavaScript
/**
|
||
* @typedef {import('mdast').Heading} Heading
|
||
* @typedef {import('mdast').Parents} Parents
|
||
* @typedef {import('../types.js').Info} Info
|
||
* @typedef {import('../types.js').State} State
|
||
*/
|
||
|
||
import {formatHeadingAsSetext} from '../util/format-heading-as-setext.js'
|
||
|
||
/**
|
||
* @param {Heading} node
|
||
* @param {Parents | undefined} _
|
||
* @param {State} state
|
||
* @param {Info} info
|
||
* @returns {string}
|
||
*/
|
||
export function heading(node, _, state, info) {
|
||
const rank = Math.max(Math.min(6, node.depth || 1), 1)
|
||
const tracker = state.createTracker(info)
|
||
|
||
if (formatHeadingAsSetext(node, state)) {
|
||
const exit = state.enter('headingSetext')
|
||
const subexit = state.enter('phrasing')
|
||
const value = state.containerPhrasing(node, {
|
||
...tracker.current(),
|
||
before: '\n',
|
||
after: '\n'
|
||
})
|
||
subexit()
|
||
exit()
|
||
|
||
return (
|
||
value +
|
||
'\n' +
|
||
(rank === 1 ? '=' : '-').repeat(
|
||
// The whole size…
|
||
value.length -
|
||
// Minus the position of the character after the last EOL (or
|
||
// 0 if there is none)…
|
||
(Math.max(value.lastIndexOf('\r'), value.lastIndexOf('\n')) + 1)
|
||
)
|
||
)
|
||
}
|
||
|
||
const sequence = '#'.repeat(rank)
|
||
const exit = state.enter('headingAtx')
|
||
const subexit = state.enter('phrasing')
|
||
|
||
// Note: for proper tracking, we should reset the output positions when there
|
||
// is no content returned, because then the space is not output.
|
||
// Practically, in that case, there is no content, so it doesn’t matter that
|
||
// we’ve tracked one too many characters.
|
||
tracker.move(sequence + ' ')
|
||
|
||
let value = state.containerPhrasing(node, {
|
||
before: '# ',
|
||
after: '\n',
|
||
...tracker.current()
|
||
})
|
||
|
||
if (/^[\t ]/.test(value)) {
|
||
// To do: what effect has the character reference on tracking?
|
||
value =
|
||
'&#x' +
|
||
value.charCodeAt(0).toString(16).toUpperCase() +
|
||
';' +
|
||
value.slice(1)
|
||
}
|
||
|
||
value = value ? sequence + ' ' + value : sequence
|
||
|
||
if (state.options.closeAtx) {
|
||
value += ' ' + sequence
|
||
}
|
||
|
||
subexit()
|
||
exit()
|
||
|
||
return value
|
||
}
|