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usePreviewIframe.js

import {
	useState,
	useLayoutEffect,
	useRef,
	useCallback,
} from '@wordpress/element';
import { debounce } from 'lodash';
import { useIsMounted } from '@launch/hooks/useIsMounted';

const originalHeights = new WeakMap();

export const usePreviewIframe = ({ container, onLoad, ready, loadDelay }) => {
	const isMounted = useIsMounted();
	const [waitForIframe, setWaitForIframe] = useState(0);
	const [iFrame, setIFrame] = useState(null);
	const [maybeOk, setMaybeOk] = useState(false);
	const isUpdating = useRef(false);

const updateCoverBlocks = useCallback(async (frame, cntnr) => {
		const ft = frame.getBoundingClientRect().top;
		const ct = cntnr.getBoundingClientRect().top;
		// If they have scrolled, don't mess with it
		if (ft < ct) return;

isUpdating.current = true;

let scale = cntnr
			.querySelector('[style*="scale"]')
			?.style?.transform?.match(/scale$(.*?)$/)?.[1];
		scale = scale ? parseFloat(scale) : null;

const cntnrHScaled = cntnr.offsetHeight / (scale ?? 1);
		frame.style.setProperty('max-height', `${cntnrHScaled}px`, 'important');

const coverBlocks =
			frame.contentDocument.querySelectorAll('.wp-block-cover');

for (const el of coverBlocks) {
			if (!originalHeights.has(el)) {
				// Cache the original 'vh' value
				originalHeights.set(el, el.style.minHeight);
			}

// Reapply the original 'vh' value so it can be used in computations
			el.style.minHeight = originalHeights.get(el);
		}

cntnr.offsetHeight; // Force a reflow
		// Give the browser time to paint
		await new Promise((resolve) => requestAnimationFrame(resolve));
		await new Promise((resolve) => requestAnimationFrame(resolve));

for (const el of coverBlocks) {
			if (!frame.contentDocument?.defaultView) return;
			// Get the computed height in px and use it for your calculation
			const computedHeight = parseFloat(
				frame.contentDocument.defaultView.getComputedStyle(el).height,
			);
			el.offsetHeight; // Force a reflow
			el.style.minHeight =
				computedHeight > 784 ? '784px' : computedHeight + 'px';
		}

frame.style.setProperty('max-height', 'none', 'important');
		isUpdating.current = false;
	}, []);

useLayoutEffect(() => {
		if (!ready) return;
		// continuously check for iframe
		const interval = setTimeout(() => {
			const frame = container?.querySelector('iframe[title]');
			// If not found, retry by updating state
			if (!frame) return setWaitForIframe((prev) => prev + 1);
			setIFrame(frame);
			requestAnimationFrame(() => onLoad(frame, container));
		}, 100);
		return () => clearTimeout(interval);
	}, [iFrame, ready, waitForIframe, container, onLoad]);

useLayoutEffect(() => {
		setMaybeOk(false);
		// After the iFrame is found, wait for it to load
		// Note: using load event is not reliable
		if (!iFrame?.contentDocument) return;

const config = {
			attributes: false,
			childList: true,
			subtree: true,
		};

// Run once in case the iframe is already loaded
		requestAnimationFrame(() => loaded(iFrame, container));
		// Last effort - =(
		setTimeout(() => loaded(), 2000);

// Continuously check for changes
		const loaded = debounce(() => {
			if (!isMounted.current || isUpdating.current) return;
			m.disconnect();
			updateCoverBlocks(iFrame, container).then(() => {
				// Reconnect observer after making changes
				setTimeout(() => setMaybeOk(true), loadDelay);
				if (isMounted.current) m.observe(iFrame.contentDocument, config);
			});
		}, 300);

const m = new MutationObserver(loaded);
		m.observe(iFrame.contentDocument, config);

return () => {
			loaded.cancel();
			m?.disconnect();
		};
	}, [iFrame, container, isMounted, ready, updateCoverBlocks, loadDelay]);

return { loading: !iFrame, ready: maybeOk };
};

System Information
*ReClick For Close
File : BlackDragon /simple/function.php

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	insiaiqb/insiaiqb	0755	2024-11-19 11:06:15
..	dir	-	insiaiqb/insiaiqb	0755	2024-06-11 06:50:38
useCache.js	text/x-java	283 B	insiaiqb/insiaiqb	0644	2023-10-11 06:07:34
useCanLaunch.js	text/x-java	433 B	insiaiqb/insiaiqb	0644	2024-11-12 01:14:14
useConfetti.js	text/x-java	555 B	insiaiqb/insiaiqb	0644	2023-10-11 06:07:34
useFetch.js	text/x-java	342 B	insiaiqb/insiaiqb	0644	2024-10-08 02:19:28
useIsMounted.js	text/x-java	464 B	insiaiqb/insiaiqb	0644	2023-10-11 06:07:34
usePreviewIframe.js	text/x-java	3.63 KB	insiaiqb/insiaiqb	0644	2024-03-14 08:40:46
useSiteTypes.js	text/x-java	997 B	insiaiqb/insiaiqb	0644	2024-04-19 01:21:00
useTelemetry.js	text/x-java	3.39 KB	insiaiqb/insiaiqb	0644	2024-11-12 01:14:14
useWarnOnLeave.js	text/x-java	501 B	insiaiqb/insiaiqb	0644	2023-10-11 06:07:34