39 lines
982 B
JavaScript
39 lines
982 B
JavaScript
/**
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* @link from https://github.com/killercup/grock/blob/5280ae63e16c5739e9233d9009bc235ed7d79a50/styles/solarized/assets/js/behavior.coffee#L54-L81
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*/
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const tocToTree = function (toc) {
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const headlines = []
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const last = {}
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toc.forEach(headline => {
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const level = headline.level || 1
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const len = level - 1
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if (last[len]) {
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last[len].children = last[len].children || []
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last[len].children.push(headline)
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} else {
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headlines.push(headline)
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last[level] = headline
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}
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})
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return headlines
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}
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const buildHeadlinesTree = function (tree, tpl = '') {
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if (!tree || !tree.length) return ''
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tree.forEach((node) => {
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tpl += `<li><a class="section-link" href="#${node.slug}">${node.title}</a></li>`
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if (node.children) {
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tpl += `<li><ul class="children">${buildHeadlinesTree(node.children)}</li>`
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}
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})
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return tpl + '</ul>'
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}
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export default function (toc) {
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return buildHeadlinesTree(tocToTree(toc), '<ul>')
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}
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