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101 lines
2.9 KiB
JavaScript
101 lines
2.9 KiB
JavaScript
/**
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* @import {Info, State} from 'mdast-util-to-markdown'
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* @import {List, Parents} from 'mdast'
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*/
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import {checkBullet} from '../util/check-bullet.js'
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import {checkBulletOther} from '../util/check-bullet-other.js'
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import {checkBulletOrdered} from '../util/check-bullet-ordered.js'
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import {checkRule} from '../util/check-rule.js'
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/**
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* @param {List} node
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* @param {Parents | undefined} parent
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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 list(node, parent, state, info) {
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const exit = state.enter('list')
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const bulletCurrent = state.bulletCurrent
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/** @type {string} */
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let bullet = node.ordered ? checkBulletOrdered(state) : checkBullet(state)
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/** @type {string} */
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const bulletOther = node.ordered
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? bullet === '.'
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? ')'
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: '.'
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: checkBulletOther(state)
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let useDifferentMarker =
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parent && state.bulletLastUsed ? bullet === state.bulletLastUsed : false
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if (!node.ordered) {
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const firstListItem = node.children ? node.children[0] : undefined
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// If there’s an empty first list item directly in two list items,
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// we have to use a different bullet:
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//
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// ```markdown
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// * - *
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// ```
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//
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// …because otherwise it would become one big thematic break.
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if (
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// Bullet could be used as a thematic break marker:
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(bullet === '*' || bullet === '-') &&
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// Empty first list item:
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firstListItem &&
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(!firstListItem.children || !firstListItem.children[0]) &&
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// Directly in two other list items:
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state.stack[state.stack.length - 1] === 'list' &&
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state.stack[state.stack.length - 2] === 'listItem' &&
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state.stack[state.stack.length - 3] === 'list' &&
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state.stack[state.stack.length - 4] === 'listItem' &&
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// That are each the first child.
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state.indexStack[state.indexStack.length - 1] === 0 &&
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state.indexStack[state.indexStack.length - 2] === 0 &&
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state.indexStack[state.indexStack.length - 3] === 0
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) {
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useDifferentMarker = true
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}
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// If there’s a thematic break at the start of the first list item,
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// we have to use a different bullet:
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//
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// ```markdown
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// * ---
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// ```
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//
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// …because otherwise it would become one big thematic break.
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if (checkRule(state) === bullet && firstListItem) {
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let index = -1
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while (++index < node.children.length) {
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const item = node.children[index]
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if (
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item &&
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item.type === 'listItem' &&
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item.children &&
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item.children[0] &&
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item.children[0].type === 'thematicBreak'
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) {
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useDifferentMarker = true
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break
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}
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}
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}
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}
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if (useDifferentMarker) {
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bullet = bulletOther
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}
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state.bulletCurrent = bullet
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const value = state.containerFlow(node, info)
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state.bulletLastUsed = bullet
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state.bulletCurrent = bulletCurrent
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exit()
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return value
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}
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