ui/node_modules/@melt-ui/svelte/dist/builders/pagination/helpers.js

export function getPageItems({ page = 1, totalPages, siblingCount = 1, }) {
    const pageItems = [];
    const pagesToShow = new Set([1, totalPages]);
    const firstItemWithSiblings = 3 + siblingCount;
    const lastItemWithSiblings = totalPages - 2 - siblingCount;
    if (firstItemWithSiblings > lastItemWithSiblings) {
        for (let p = 2; p <= totalPages - 1; p++) {
            pagesToShow.add(p);
        }
    }
    else if (page < firstItemWithSiblings) {
        for (let p = 2; p <= Math.min(firstItemWithSiblings, totalPages); p++) {
            pagesToShow.add(p);
        }
    }
    else if (page > lastItemWithSiblings) {
        for (let p = totalPages - 1; p >= Math.max(lastItemWithSiblings, 2); p--) {
            pagesToShow.add(p);
        }
    }
    else {
        for (let p = Math.max(page - siblingCount, 2); p <= Math.min(page + siblingCount, totalPages); p++) {
            pagesToShow.add(p);
        }
    }
    const addPage = (value) => {
        pageItems.push({ type: 'page', value, key: `page-${value}` });
    };
    const addEllipsis = () => {
        pageItems.push({ type: 'ellipsis', key: `ellipsis-${pageItems.length}` });
    };
    let lastNumber = 0;
    for (const page of Array.from(pagesToShow).sort((a, b) => a - b)) {
        if (page - lastNumber > 1) {
            addEllipsis();
        }
        addPage(page);
        lastNumber = page;
    }
    return pageItems;
}