mirror of
https://github.com/go-gitea/gitea.git
synced 2025-10-31 02:46:04 +01:00
44 lines
1.9 KiB
TypeScript
44 lines
1.9 KiB
TypeScript
/* To manually test:
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[markup.in-iframe]
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ENABLED = true
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FILE_EXTENSIONS = .in-iframe
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RENDER_CONTENT_MODE = iframe
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RENDER_COMMAND = `echo '<div style="width: 100%; height: 2000px; border: 10px solid red; box-sizing: border-box;"><a href="/">a link</a> <a target="_blank" href="//gitea.com">external link</a></div>'`
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;RENDER_COMMAND = cat /path/to/file.pdf
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;RENDER_CONTENT_SANDBOX = disabled
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*/
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function mainExternalRenderIframe() {
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const u = new URL(window.location.href);
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const iframeId = u.searchParams.get('gitea-iframe-id');
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// iframe is in different origin, so we need to use postMessage to communicate
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const postIframeMsg = (cmd: string, data: Record<string, any> = {}) => {
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window.parent.postMessage({giteaIframeCmd: cmd, giteaIframeId: iframeId, ...data}, '*');
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};
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const updateIframeHeight = () => postIframeMsg('resize', {iframeHeight: document.documentElement.scrollHeight});
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updateIframeHeight();
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window.addEventListener('DOMContentLoaded', updateIframeHeight);
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// the easiest way to handle dynamic content changes and easy to debug, can be fine-tuned in the future
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setInterval(updateIframeHeight, 1000);
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// no way to open an absolute link with CSP frame-src, it also needs some tricks like "postMessage" or "copy the link to clipboard"
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const openIframeLink = (link: string, target: string) => postIframeMsg('open-link', {openLink: link, anchorTarget: target});
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document.addEventListener('click', (e) => {
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const el = e.target as HTMLAnchorElement;
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if (el.nodeName !== 'A') return;
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const href = el.getAttribute('href') || '';
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// safe links: "./any", "../any", "/any", "//host/any", "http://host/any", "https://host/any"
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if (href.startsWith('.') || href.startsWith('/') || href.startsWith('http://') || href.startsWith('https://')) {
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e.preventDefault();
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openIframeLink(href, el.getAttribute('target'));
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}
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});
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}
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mainExternalRenderIframe();
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