Function collapseSelectionForRestore

src/lib/saveState.js:101–116

(selection)

};

function collapseSelectionForRestore(selection) {
	if (!selection?.ranges?.length) return selection;

	const mainIndex =
		selection.mainIndex >= 0 && selection.mainIndex < selection.ranges.length
			? selection.mainIndex
			: 0;
	const main = selection.ranges[mainIndex];
	const head = Number.isFinite(main?.to) ? main.to : (main?.from ?? 0);
	const cursor = Math.max(0, head | 0);

	return {
		ranges: [{ from: cursor, to: cursor }],
		mainIndex: 0,
	};
}