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Ignore self-closing special tags for markdown-it #1408

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Merged
ang-zeyu merged 1 commit into from
Dec 6, 2020
Merged

Ignore self-closing special tags for markdown-it #1408

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15 changes: 14 additions & 1 deletion packages/core/src/lib/markdown-it/markdown-it-escape-special-tags.js
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Original file line number Diff line number Diff line change
Expand Up @@ -12,7 +12,20 @@ function escape_plugin(md, tagsToIgnore) {
const specialTagsRegex = Array.from(tagsToIgnore)
.concat(['script|pre|style|variable'])
.join('|');
const startingSpecialTagRegex = new RegExp(`^<(${specialTagsRegex})(?=(\\s|>|$))`, 'i');

// attr_name, unquoted ... attribute patterns adapted from markdown-it/lib/common/html_re
// Construct self-closing negative lookahead for special tags,
// because if matched, the endingSpecialTagRegex will roll down to find a non-existent closing tag
const attr_name = '[a-zA-Z_:][a-zA-Z0-9:._-]*';
const unquoted = '[^"\'=<>`\\x00-\\x20]+';
const single_quoted = "'[^']*'";
const double_quoted = '"[^"]*"';
const attr_value = '(?:' + unquoted + '|' + single_quoted + '|' + double_quoted + ')';
const attribute = '(?:\\s+' + attr_name + '(?:\\s*=\\s*' + attr_value + ')?)';
const selfClosingNegativeLookahead = `(?!${attribute}*\\s*\/>)`;

const startingSpecialTagRegex = new RegExp(
`^<(${specialTagsRegex})${selfClosingNegativeLookahead}(?=(\\s|>|$))`, 'i');
const endingSpecialTagRegex = new RegExp(`<\\/(${specialTagsRegex})>`, 'i');

const HTML_SEQUENCES = [
Expand Down