64 lines
2.4 KiB
JavaScript
Executable File
64 lines
2.4 KiB
JavaScript
Executable File
module.exports = function(md, options) {
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options = options || {};
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options.listUnicodeChar = options.hasOwnProperty('listUnicodeChar') ? options.listUnicodeChar : false;
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options.stripListLeaders = options.hasOwnProperty('stripListLeaders') ? options.stripListLeaders : true;
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options.gfm = options.hasOwnProperty('gfm') ? options.gfm : true;
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options.useImgAltText = options.hasOwnProperty('useImgAltText') ? options.useImgAltText : true;
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var output = md || '';
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// Remove horizontal rules (stripListHeaders conflict with this rule, which is why it has been moved to the top)
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output = output.replace(/^(-\s*?|\*\s*?|_\s*?){3,}\s*$/gm, '');
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try {
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if (options.stripListLeaders) {
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if (options.listUnicodeChar)
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output = output.replace(/^([\s\t]*)([\*\-\+]|\d+\.)\s+/gm, options.listUnicodeChar + ' $1');
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else
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output = output.replace(/^([\s\t]*)([\*\-\+]|\d+\.)\s+/gm, '$1');
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}
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if (options.gfm) {
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output = output
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// Header
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.replace(/\n={2,}/g, '\n')
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// Fenced codeblocks
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.replace(/~{3}.*\n/g, '')
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// Strikethrough
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.replace(/~~/g, '')
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// Fenced codeblocks
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.replace(/`{3}.*\n/g, '');
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}
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output = output
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// Remove HTML tags
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.replace(/<[^>]*>/g, '')
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// Remove setext-style headers
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.replace(/^[=\-]{2,}\s*$/g, '')
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// Remove footnotes?
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.replace(/\[\^.+?\](\: .*?$)?/g, '')
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.replace(/\s{0,2}\[.*?\]: .*?$/g, '')
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// Remove images
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.replace(/\!\[(.*?)\][\[\(].*?[\]\)]/g, options.useImgAltText ? '$1' : '')
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// Remove inline links
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.replace(/\[(.*?)\][\[\(].*?[\]\)]/g, '$1')
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// Remove blockquotes
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.replace(/^\s{0,3}>\s?/g, '')
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// Remove reference-style links?
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.replace(/^\s{1,2}\[(.*?)\]: (\S+)( ".*?")?\s*$/g, '')
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// Remove atx-style headers
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.replace(/^(\n)?\s{0,}#{1,6}\s+| {0,}(\n)?\s{0,}#{0,} {0,}(\n)?\s{0,}$/gm, '$1$2$3')
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// Remove emphasis (repeat the line to remove double emphasis)
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.replace(/([\*_]{1,3})(\S.*?\S{0,1})\1/g, '$2')
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.replace(/([\*_]{1,3})(\S.*?\S{0,1})\1/g, '$2')
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// Remove code blocks
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.replace(/(`{3,})(.*?)\1/gm, '$2')
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// Remove inline code
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.replace(/`(.+?)`/g, '$1')
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// Replace two or more newlines with exactly two? Not entirely sure this belongs here...
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.replace(/\n{2,}/g, '\n\n');
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} catch(e) {
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console.error(e);
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return md;
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}
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return output;
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};
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