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