devextreme/cjs/__internal/pagination/utils/validation_utils.js

HTML5 JavaScript Component Suite for Responsive Web Development

/**
 * DevExtreme (cjs/__internal/pagination/utils/validation_utils.js)
 * Version: 24.2.6
 * Build date: Mon Mar 17 2025
 *
 * Copyright (c) 2012 - 2025 Developer Express Inc. ALL RIGHTS RESERVED
 * Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
 */

"use strict";
Object.defineProperty(exports, "__esModule", {
    value: true
});
exports.validateOptions = validateOptions;

function getPageSize(pageSize) {
    if (pageSize < 1) {
        return 1
    }
    return pageSize
}

function getItemCount(itemCount) {
    if (itemCount < 0) {
        return 0
    }
    return itemCount
}

function getPageCount(pageSize, itemCount) {
    if (pageSize > 0 && itemCount > 0) {
        return Math.max(1, Math.ceil(itemCount / pageSize))
    }
    return 1
}

function getPageIndex(pageIndex, pageSize, itemCount) {
    if (pageIndex < 1) {
        return 1
    }
    const pageCount = getPageCount(pageSize, itemCount);
    return Math.min(pageIndex, pageCount)
}

function validateOptions(oldPageSize, oldPageIndex, oldItemCount) {
    const pageSize = getPageSize(oldPageSize);
    const itemCount = getItemCount(oldItemCount);
    const pageCount = getPageCount(pageSize, oldItemCount);
    const pageIndex = getPageIndex(oldPageIndex, pageSize, itemCount);
    return {
        pageSize: pageSize,
        pageIndex: pageIndex,
        itemCount: itemCount,
        pageCount: pageCount
    }
}