jarvis-at-skic
9347de298f
Build and publish Eldorado documentation / build (pull_request) Successful in 43s
22 lines
1011 B
JavaScript
22 lines
1011 B
JavaScript
// Sandboxed viewers have opaque origins: authenticate the sender by WindowProxy,
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// not origin. Only exchange a validated theme, never HTML, URLs or commands.
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(() => {
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if (window.parent === window) return;
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let connected = false;
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window.addEventListener('message', event => {
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if (event.source !== window.parent || event.data?.type !== 'eldorado:set-theme') return;
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const theme = event.data.theme;
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if (theme !== 'light' && theme !== 'dark') return;
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connected = true;
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if (document.documentElement.dataset.theme !== theme) {
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document.getElementById('btn-theme').click();
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// Parent updates are not new user choices; do not echo stale acknowledgements.
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observer.takeRecords();
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}
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});
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const observer = new MutationObserver(() => {
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if (connected) window.parent.postMessage({type: 'eldorado:theme', theme: document.documentElement.dataset.theme}, '*');
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});
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observer.observe(document.documentElement, {attributes: true, attributeFilter: ['data-theme']});
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})();
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