149 lines
4.3 KiB
Plaintext
149 lines
4.3 KiB
Plaintext
/**
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* @import {HtmlExtension} from 'micromark-util-types'
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*/
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import {ok as assert} from 'devlop'
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const alignment = {
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none: '',
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left: ' align="left"',
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right: ' align="right"',
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center: ' align="center"'
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}
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// To do: micromark@5: use `infer` here, when all events are exposed.
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/**
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* Create an HTML extension for `micromark` to support GitHub tables when
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* serializing to HTML.
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*
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* @returns {HtmlExtension}
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* Extension for `micromark` that can be passed in `htmlExtensions` to
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* support GitHub tables when serializing to HTML.
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*/
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export function gfmTableHtml() {
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return {
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enter: {
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table(token) {
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const tableAlign = token._align
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assert(tableAlign, 'expected `_align`')
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this.lineEndingIfNeeded()
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this.tag('<table>')
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this.setData('tableAlign', tableAlign)
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},
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tableBody() {
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this.tag('<tbody>')
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},
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tableData() {
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const tableAlign = this.getData('tableAlign')
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const tableColumn = this.getData('tableColumn')
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assert(tableAlign, 'expected `tableAlign`')
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assert(typeof tableColumn === 'number', 'expected `tableColumn`')
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const align = alignment[tableAlign[tableColumn]]
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if (align === undefined) {
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// Capture results to ignore them.
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this.buffer()
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} else {
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this.lineEndingIfNeeded()
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this.tag('<td' + align + '>')
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}
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},
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tableHead() {
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this.lineEndingIfNeeded()
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this.tag('<thead>')
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},
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tableHeader() {
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const tableAlign = this.getData('tableAlign')
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const tableColumn = this.getData('tableColumn')
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assert(tableAlign, 'expected `tableAlign`')
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assert(typeof tableColumn === 'number', 'expected `tableColumn`')
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const align = alignment[tableAlign[tableColumn]]
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this.lineEndingIfNeeded()
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this.tag('<th' + align + '>')
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},
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tableRow() {
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this.setData('tableColumn', 0)
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this.lineEndingIfNeeded()
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this.tag('<tr>')
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}
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},
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exit: {
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// Overwrite the default code text data handler to unescape escaped pipes when
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// they are in tables.
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codeTextData(token) {
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let value = this.sliceSerialize(token)
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if (this.getData('tableAlign')) {
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value = value.replace(/\\([\\|])/g, replace)
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}
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this.raw(this.encode(value))
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},
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table() {
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this.setData('tableAlign')
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// Note: we don’t set `slurpAllLineEndings` anymore, in delimiter rows,
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// but we do need to reset it to match a funky newline GH generates for
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// list items combined with tables.
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this.setData('slurpAllLineEndings')
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this.lineEndingIfNeeded()
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this.tag('</table>')
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},
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tableBody() {
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this.lineEndingIfNeeded()
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this.tag('</tbody>')
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},
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tableData() {
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const tableAlign = this.getData('tableAlign')
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const tableColumn = this.getData('tableColumn')
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assert(tableAlign, 'expected `tableAlign`')
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assert(typeof tableColumn === 'number', 'expected `tableColumn`')
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if (tableColumn in tableAlign) {
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this.tag('</td>')
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this.setData('tableColumn', tableColumn + 1)
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} else {
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// Stop capturing.
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this.resume()
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}
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},
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tableHead() {
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this.lineEndingIfNeeded()
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this.tag('</thead>')
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},
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tableHeader() {
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const tableColumn = this.getData('tableColumn')
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assert(typeof tableColumn === 'number', 'expected `tableColumn`')
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this.tag('</th>')
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this.setData('tableColumn', tableColumn + 1)
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},
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tableRow() {
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const tableAlign = this.getData('tableAlign')
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let tableColumn = this.getData('tableColumn')
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assert(tableAlign, 'expected `tableAlign`')
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assert(typeof tableColumn === 'number', 'expected `tableColumn`')
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while (tableColumn < tableAlign.length) {
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this.lineEndingIfNeeded()
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this.tag('<td' + alignment[tableAlign[tableColumn]] + '></td>')
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tableColumn++
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}
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this.setData('tableColumn', tableColumn)
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this.lineEndingIfNeeded()
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this.tag('</tr>')
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}
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}
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}
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}
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/**
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* @param {string} $0
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* @param {string} $1
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* @returns {string}
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*/
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function replace($0, $1) {
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// Pipes work, backslashes don’t (but can’t escape pipes).
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return $1 === '|' ? $1 : $0
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}
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