36 lines
1.2 KiB
TypeScript
36 lines
1.2 KiB
TypeScript
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const WIKILINK_SCHEME = 'wikilink://'
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export { WIKILINK_SCHEME }
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function encodeTarget(target: string): string {
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return encodeURIComponent(target).replace(/\(/g, '%28').replace(/\)/g, '%29')
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}
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function escapeLinkText(text: string): string {
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return text.replace(/[[\]]/g, '\\$&')
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}
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function replaceWikilinksInText(text: string): string {
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return text.replace(/\[\[([^\]]+)\]\]/g, (_, inner: string) => {
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const pipeIdx = inner.indexOf('|')
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const target = pipeIdx !== -1 ? inner.slice(0, pipeIdx) : inner
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const display = pipeIdx !== -1 ? inner.slice(pipeIdx + 1) : inner
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return `[${escapeLinkText(display)}](${WIKILINK_SCHEME}${encodeTarget(target)})`
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})
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}
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/** Convert [[Target]] to markdown links, but skip code blocks and inline code. */
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export function preprocessWikilinks(md: string): string {
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const segments: string[] = []
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const codeRegex = /(```[\s\S]*?```|`[^`\n]+`)/g
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let lastIndex = 0
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let match
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while ((match = codeRegex.exec(md)) !== null) {
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segments.push(replaceWikilinksInText(md.slice(lastIndex, match.index)))
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segments.push(match[0])
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lastIndex = match.index + match[0].length
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}
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segments.push(replaceWikilinksInText(md.slice(lastIndex)))
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return segments.join('')
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}
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