devsite/node_modules/markdown-it/lib/rules_inline/linkify.js

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2024-07-08 01:49:38 +00:00
// Process links like https://example.org/
'use strict';
// RFC3986: scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )
var SCHEME_RE = /(?:^|[^a-z0-9.+-])([a-z][a-z0-9.+-]*)$/i;
module.exports = function linkify(state, silent) {
var pos, max, match, proto, link, url, fullUrl, token;
if (!state.md.options.linkify) return false;
if (state.linkLevel > 0) return false;
pos = state.pos;
max = state.posMax;
if (pos + 3 > max) return false;
if (state.src.charCodeAt(pos) !== 0x3A/* : */) return false;
if (state.src.charCodeAt(pos + 1) !== 0x2F/* / */) return false;
if (state.src.charCodeAt(pos + 2) !== 0x2F/* / */) return false;
match = state.pending.match(SCHEME_RE);
if (!match) return false;
proto = match[1];
link = state.md.linkify.matchAtStart(state.src.slice(pos - proto.length));
if (!link) return false;
url = link.url;
// invalid link, but still detected by linkify somehow;
// need to check to prevent infinite loop below
if (url.length <= proto.length) return false;
// disallow '*' at the end of the link (conflicts with emphasis)
url = url.replace(/\*+$/, '');
fullUrl = state.md.normalizeLink(url);
if (!state.md.validateLink(fullUrl)) return false;
if (!silent) {
state.pending = state.pending.slice(0, -proto.length);
token = state.push('link_open', 'a', 1);
token.attrs = [ [ 'href', fullUrl ] ];
token.markup = 'linkify';
token.info = 'auto';
token = state.push('text', '', 0);
token.content = state.md.normalizeLinkText(url);
token = state.push('link_close', 'a', -1);
token.markup = 'linkify';
token.info = 'auto';
}
state.pos += url.length - proto.length;
return true;
};