66 lines
1.7 KiB
JavaScript
66 lines
1.7 KiB
JavaScript
/**
|
||
* @typedef {import('mdast').ImageReference} ImageReference
|
||
* @typedef {import('mdast').Parents} Parents
|
||
* @typedef {import('../types.js').Info} Info
|
||
* @typedef {import('../types.js').State} State
|
||
*/
|
||
|
||
imageReference.peek = imageReferencePeek
|
||
|
||
/**
|
||
* @param {ImageReference} node
|
||
* @param {Parents | undefined} _
|
||
* @param {State} state
|
||
* @param {Info} info
|
||
* @returns {string}
|
||
*/
|
||
export function imageReference(node, _, state, info) {
|
||
const type = node.referenceType
|
||
const exit = state.enter('imageReference')
|
||
let subexit = state.enter('label')
|
||
const tracker = state.createTracker(info)
|
||
let value = tracker.move('![')
|
||
const alt = state.safe(node.alt, {
|
||
before: value,
|
||
after: ']',
|
||
...tracker.current()
|
||
})
|
||
value += tracker.move(alt + '][')
|
||
|
||
subexit()
|
||
// Hide the fact that we’re in phrasing, because escapes don’t work.
|
||
const stack = state.stack
|
||
state.stack = []
|
||
subexit = state.enter('reference')
|
||
// Note: for proper tracking, we should reset the output positions when we end
|
||
// up making a `shortcut` reference, because then there is no brace output.
|
||
// Practically, in that case, there is no content, so it doesn’t matter that
|
||
// we’ve tracked one too many characters.
|
||
const reference = state.safe(state.associationId(node), {
|
||
before: value,
|
||
after: ']',
|
||
...tracker.current()
|
||
})
|
||
subexit()
|
||
state.stack = stack
|
||
exit()
|
||
|
||
if (type === 'full' || !alt || alt !== reference) {
|
||
value += tracker.move(reference + ']')
|
||
} else if (type === 'shortcut') {
|
||
// Remove the unwanted `[`.
|
||
value = value.slice(0, -1)
|
||
} else {
|
||
value += tracker.move(']')
|
||
}
|
||
|
||
return value
|
||
}
|
||
|
||
/**
|
||
* @returns {string}
|
||
*/
|
||
function imageReferencePeek() {
|
||
return '!'
|
||
}
|