Markdown parser, done right. 100% CommonMark support, extensions, syntax plugins & high speed
https://markdown-it.github.io/
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56 lines
1.6 KiB
56 lines
1.6 KiB
// Process links like https://example.org/
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// RFC3986: scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )
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const SCHEME_RE = /(?:^|[^a-z0-9.+-])([a-z][a-z0-9.+-]*)$/i
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export default function linkify (state, silent) {
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if (!state.md.options.linkify) return false
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if (state.linkLevel > 0) return false
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const pos = state.pos
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const max = state.posMax
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if (pos + 3 > max) return false
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if (state.src.charCodeAt(pos) !== 0x3A/* : */) return false
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if (state.src.charCodeAt(pos + 1) !== 0x2F/* / */) return false
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if (state.src.charCodeAt(pos + 2) !== 0x2F/* / */) return false
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const match = state.pending.match(SCHEME_RE)
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if (!match) return false
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const proto = match[1]
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const link = state.md.linkify.matchAtStart(state.src.slice(pos - proto.length))
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if (!link) return false
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let url = link.url
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// invalid link, but still detected by linkify somehow;
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// need to check to prevent infinite loop below
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if (url.length <= proto.length) return false
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// disallow '*' at the end of the link (conflicts with emphasis)
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url = url.replace(/\*+$/, '')
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const fullUrl = state.md.normalizeLink(url)
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if (!state.md.validateLink(fullUrl)) return false
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if (!silent) {
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state.pending = state.pending.slice(0, -proto.length)
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const token_o = state.push('link_open', 'a', 1)
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token_o.attrs = [['href', fullUrl]]
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token_o.markup = 'linkify'
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token_o.info = 'auto'
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const token_t = state.push('text', '', 0)
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token_t.content = state.md.normalizeLinkText(url)
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const token_c = state.push('link_close', 'a', -1)
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token_c.markup = 'linkify'
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token_c.info = 'auto'
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}
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state.pos += url.length - proto.length
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return true
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}
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