58 lines
1.6 KiB
JavaScript
58 lines
1.6 KiB
JavaScript
import Component from '@glimmer/component';
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import { tracked } from '@glimmer/tracking';
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import { action } from '@ember/object';
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/**
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* @module PaginationControls
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* PaginationControls components are used to paginate through item lists
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*
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* @example
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* ```js
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* <PaginationControls @startPage={{1}} @total={{100}} @size={{15}} @onChange={{this.onPageChange}} />
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* ```
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* @param {number} total - total number of items
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* @param {number} [startPage=1] - initial page number to select
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* @param {number} [size=15] - number of items to display per page
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* @param {function} onChange - callback fired on page change
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*/
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export default class PaginationControls extends Component {
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@tracked page;
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constructor() {
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super(...arguments);
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this.page = this.args.startPage || 1;
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this.size = this.args.size || 15; // size selector may be added in future version
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}
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get totalPages() {
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return Math.ceil(this.args.total / this.size);
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}
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get displayInfo() {
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const { total } = this.args;
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const end = this.page * this.size;
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return `${end - this.size + 1}-${end > total ? total : end} of ${total}`;
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}
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get pages() {
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// show 5 pages with 2 on either side of the current page
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let start = this.page - 2 >= 1 ? this.page - 2 : 1;
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const incrementer = start + 4;
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const end = incrementer <= this.totalPages ? incrementer : this.totalPages;
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const pageNumbers = [];
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while (start <= end) {
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pageNumbers.push(start);
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start++;
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}
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return pageNumbers;
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}
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get hasMorePages() {
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return this.pages.lastObject !== this.totalPages;
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}
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@action
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changePage(page) {
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this.page = page;
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this.args.onChange(page);
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}
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}
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