@pierre/diffs/dist/utils/guardWebKitScrollDuringRebuild.js

//#region src/utils/guardWebKitScrollDuringRebuild.ts
/**
* Runs a wholesale code-column rebuild with the pre element's height pinned,
* working around a WebKit bug (https://bugs.webkit.org/show_bug.cgi?id=308027):
* when the subtree of a `container-type: inline-size` element is rewritten in
* bulk (column innerHTML swaps, grid-row span rewrites), WebKit resolves the
* ancestor scroller's offset against a transiently collapsed interim layout
* and clamps scrollTop to 0 — the scroller visibly jumps to the top on every
* edit. Pinning `min-height` keeps that interim layout at full height so the
* scroll offset survives; the layout read before unpinning is required, since
* it materializes the interim layout while the pin is active.
*
* Both the pin height read and the pinned-layout read force a synchronous
* layout, so callers own the gating via shouldGuardRebuildScroll: Safari-only,
* edit-mode-only, and never inside CodeView's batched read/write render pass.
*/
function guardWebKitScrollDuringRebuild(pre, rebuild) {
	const height = pre?.offsetHeight ?? 0;
	if (pre == null || height === 0) {
		rebuild();
		return;
	}
	pre.style.minHeight = `${height}px`;
	try {
		rebuild();
		pre.offsetHeight;
	} finally {
		pre.style.minHeight = "";
	}
}
//#endregion
export { guardWebKitScrollDuringRebuild };

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