53 lines
1.4 KiB
TypeScript
53 lines
1.4 KiB
TypeScript
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import { MarkedOptions, Renderer, unescape } from '@ts-stack/markdown'
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import { openExternalBrowserIfDesktop } from './openWindow'
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/**
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* Main goal of this custom renderer is to prevent links from changing the current location
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* this is specially important for the desktop app.
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*/
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export class SafeRenderer extends Renderer {
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constructor(options: MarkedOptions) {
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super(options)
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// Attach a global function for non-react anchor elements that need safe navigation
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window.openExternalLink = (e: React.MouseEvent<HTMLAnchorElement>) => {
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openExternalBrowserIfDesktop()(e)
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}
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}
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// Extended from https://github.com/ts-stack/markdown/blob/c5c1925c1153ca2fe9051c356ef0ddc60b3e1d6a/packages/markdown/src/renderer.ts#L116
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link(href: string, title: string, text: string): string {
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if (this.options.sanitize) {
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let prot: string
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try {
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prot = decodeURIComponent(unescape(href))
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.replace(/[^\w:]/g, '')
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.toLowerCase()
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} catch (e) {
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return text
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}
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if (
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// eslint-disable-next-line no-script-url
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prot.indexOf('javascript:') === 0 ||
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prot.indexOf('vbscript:') === 0 ||
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prot.indexOf('data:') === 0
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) {
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return text
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}
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}
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let out =
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'<a onclick="openExternalLink(event)" target="_blank" href="' + href + '"'
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if (title) {
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out += ' title="' + title + '"'
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}
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out += '>' + text + '</a>'
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return out
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}
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}
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