@elastic/eui
Version:
Elastic UI Component Library
95 lines (92 loc) • 3.76 kB
JavaScript
import _createClass from "@babel/runtime/helpers/createClass";
import _classCallCheck from "@babel/runtime/helpers/classCallCheck";
import _defineProperty from "@babel/runtime/helpers/defineProperty";
/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
import { isNumber } from '../predicate';
export var Pager = /*#__PURE__*/_createClass(function Pager(_totalItems, _itemsPerPage) {
var _this = this;
var initialPageIndex = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 0;
_classCallCheck(this, Pager);
_defineProperty(this, "currentPageIndex", void 0);
_defineProperty(this, "firstItemIndex", void 0);
_defineProperty(this, "itemsPerPage", void 0);
_defineProperty(this, "lastItemIndex", void 0);
_defineProperty(this, "totalItems", void 0);
_defineProperty(this, "totalPages", void 0);
_defineProperty(this, "setTotalItems", function (totalItems) {
_this.totalItems = totalItems;
_this.update();
});
_defineProperty(this, "setItemsPerPage", function (itemsPerPage) {
_this.itemsPerPage = itemsPerPage;
_this.update();
});
_defineProperty(this, "isPageable", function () {
return _this.firstItemIndex !== -1;
});
_defineProperty(this, "getTotalPages", function () {
return _this.totalPages;
});
_defineProperty(this, "getCurrentPageIndex", function () {
return _this.currentPageIndex;
});
_defineProperty(this, "getFirstItemIndex", function () {
return _this.firstItemIndex;
});
_defineProperty(this, "getLastItemIndex", function () {
return _this.lastItemIndex;
});
_defineProperty(this, "hasNextPage", function () {
return _this.currentPageIndex < _this.totalPages - 1;
});
_defineProperty(this, "hasPreviousPage", function () {
return _this.currentPageIndex > 0;
});
_defineProperty(this, "goToNextPage", function () {
_this.goToPageIndex(_this.currentPageIndex + 1);
});
_defineProperty(this, "goToPreviousPage", function () {
_this.goToPageIndex(_this.currentPageIndex - 1);
});
_defineProperty(this, "goToPageIndex", function (pageIndex) {
_this.currentPageIndex = pageIndex;
_this.update();
});
_defineProperty(this, "update", function () {
if (_this.totalItems <= 0) {
_this.totalPages = 0;
_this.currentPageIndex = 0;
_this.firstItemIndex = -1;
_this.lastItemIndex = -1;
return;
}
_this.totalPages = Math.ceil(_this.totalItems / _this.itemsPerPage);
// Ensure the current page falls within our range of total pages.
_this.currentPageIndex = Math.min(Math.max(0, _this.currentPageIndex), _this.totalPages - 1);
// Find the range of visible items on the current page.
_this.firstItemIndex = _this.currentPageIndex * _this.itemsPerPage;
_this.lastItemIndex = Math.min(_this.firstItemIndex + _this.itemsPerPage, _this.totalItems) - 1;
});
if (!isNumber(_totalItems) || isNaN(_totalItems)) {
throw new Error('Please provide a number of totalItems');
}
if (!isNumber(_itemsPerPage) || isNaN(_itemsPerPage)) {
throw new Error('Please provide a number of itemsPerPage');
}
if (!isNumber(initialPageIndex) || isNaN(initialPageIndex)) {
throw new Error('Please provide a number of initialPageIndex');
}
this.currentPageIndex = initialPageIndex;
this.firstItemIndex = -1;
this.itemsPerPage = _itemsPerPage;
this.lastItemIndex = -1;
this.totalItems = _totalItems;
this.totalPages = 0;
this.update();
});