53 lines
1.8 KiB
JavaScript
53 lines
1.8 KiB
JavaScript
const BLOCK_TAGS = ['address', 'article', 'aside', 'audio', 'blockquote', 'canvas', 'dd', 'details',
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'div', 'dl', 'fieldset', 'figcaption', 'figure', 'footer', 'form', 'h1', 'h2', 'h3',
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'h4', 'h5', 'h6', 'header', 'hgroup', 'hr', 'iframe', 'noscript', 'ol', 'output',
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'p', 'pre', 'section', 'table', 'tfoot', 'ul', 'video', 'summary'];
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function splitAtLast(tag, block, next, first) {
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const endTag = `</${tag}>`;
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let endTagIndex = first ? block.indexOf(endTag) : block.lastIndexOf(endTag);
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if (endTagIndex !== -1) {
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endTagIndex += endTag.length;
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const trailing = block.substr(endTagIndex).replace(/^\s+/, '');
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if (trailing.length) {
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next.unshift(trailing);
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}
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return [ block.substr(0, endTagIndex) ];
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}
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};
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export function setup(helper) {
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if (helper.markdownIt) { return; }
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// If a row begins with HTML tags, don't parse it.
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helper.registerBlock('html', function(block, next) {
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let split, pos;
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// Fix manual blockquote paragraphing even though it's not strictly correct
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// PERF NOTE: /\S+<blockquote/ is a perf hog for search, try on huge string
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if (pos = block.search(/<blockquote/) >= 0) {
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if(block.substring(0, pos).search(/\s/) === -1) {
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split = splitAtLast('blockquote', block, next, true);
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if (split) { return this.processInline(split[0]); }
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}
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}
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const m = /^\s*<\/?([^>]+)\>/.exec(block);
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if (m && m[1]) {
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const tag = m[1].split(/\s/);
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if (tag && tag[0] && BLOCK_TAGS.indexOf(tag[0]) !== -1) {
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split = splitAtLast(tag[0], block, next);
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if (split) {
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if (split.length === 1 && split[0] === block) { return; }
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return split;
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}
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return [ block.toString() ];
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}
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}
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});
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}
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