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30 lines
1.1 KiB
JavaScript
30 lines
1.1 KiB
JavaScript
module.exports = function(markdownIt) {
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// Add `file:` protocol in linkify to allow text in the format of "file://..." to translate into
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// file-URL links in html view
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markdownIt.linkify.add('file:', {
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validate: function(text, pos, self) {
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const tail = text.slice(pos);
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if (!self.re.file) {
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// matches all local file URI on Win/Unix/MacOS systems including reserved characters in some OS (i.e. no OS specific sanity check)
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self.re.file = new RegExp('^[\\/]{2,3}[\\S]+');
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}
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if (self.re.file.test(tail)) {
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return tail.match(self.re.file)[0].length;
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}
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return 0;
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},
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});
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// enable file link URLs in MarkdownIt. Keeps other URL restrictions of MarkdownIt untouched.
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// Format [link name](file://...)
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markdownIt.validateLink = function(url) {
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const BAD_PROTO_RE = /^(vbscript|javascript|data):/;
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const GOOD_DATA_RE = /^data:image\/(gif|png|jpeg|webp);/;
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// url should be normalized at this point, and existing entities are decoded
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const str = url.trim().toLowerCase();
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return BAD_PROTO_RE.test(str) ? (GOOD_DATA_RE.test(str) ? true : false) : true;
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};
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};
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