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52 lines
1.4 KiB
Plaintext
52 lines
1.4 KiB
Plaintext
/**
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* @typedef {import('micromark-util-types').CompileContext} CompileContext
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* @typedef {import('micromark-util-types').HtmlExtension} HtmlExtension
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* @typedef {import('micromark-util-types').Token} Token
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*/
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// An opening or closing tag start, followed by a case-insensitive specific tag name,
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// followed by HTML whitespace, a greater than, or a slash.
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const reFlow =
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/<(\/?)(iframe|noembed|noframes|plaintext|script|style|title|textarea|xmp)(?=[\t\n\f\r />])/gi
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// As HTML (text) parses tags separately (and very strictly), we don’t need to be
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// global.
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const reText = new RegExp('^' + reFlow.source, 'i')
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/**
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* Create an HTML extension for `micromark` to support GitHubs weird and
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* useless tagfilter when 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 support
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* GitHubs weird and useless tagfilter when serializing to HTML.
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*/
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export function gfmTagfilterHtml() {
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return {
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exit: {
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htmlFlowData(token) {
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exitHtmlData.call(this, token, reFlow)
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},
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htmlTextData(token) {
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exitHtmlData.call(this, token, reText)
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}
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}
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}
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}
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/**
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* @this {CompileContext}
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* @param {Token} token
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* @param {RegExp} filter
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* @returns {undefined}
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*/
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function exitHtmlData(token, filter) {
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let value = this.sliceSerialize(token)
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if (this.options.allowDangerousHtml) {
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value = value.replace(filter, '<$1$2')
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}
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this.raw(this.encode(value))
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}
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