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import { Component, ContentChild, Directive, EventEmitter, Input, Output, ChangeDetectionStrategy, TemplateRef } from '@angular/core'; import { getValueInRange, isNumber } from '../util/util'; import { NgbPaginationConfig } from './pagination-config'; /** * A directive to match the 'ellipsis' link template * * @since 4.1.0 */ export class NgbPaginationEllipsis { constructor(templateRef) { this.templateRef = templateRef; } } NgbPaginationEllipsis.decorators = [ { type: Directive, args: [{ selector: 'ng-template[ngbPaginationEllipsis]' },] } ]; NgbPaginationEllipsis.ctorParameters = () => [ { type: TemplateRef } ]; /** * A directive to match the 'first' link template * * @since 4.1.0 */ export class NgbPaginationFirst { constructor(templateRef) { this.templateRef = templateRef; } } NgbPaginationFirst.decorators = [ { type: Directive, args: [{ selector: 'ng-template[ngbPaginationFirst]' },] } ]; NgbPaginationFirst.ctorParameters = () => [ { type: TemplateRef } ]; /** * A directive to match the 'last' link template * * @since 4.1.0 */ export class NgbPaginationLast { constructor(templateRef) { this.templateRef = templateRef; } } NgbPaginationLast.decorators = [ { type: Directive, args: [{ selector: 'ng-template[ngbPaginationLast]' },] } ]; NgbPaginationLast.ctorParameters = () => [ { type: TemplateRef } ]; /** * A directive to match the 'next' link template * * @since 4.1.0 */ export class NgbPaginationNext { constructor(templateRef) { this.templateRef = templateRef; } } NgbPaginationNext.decorators = [ { type: Directive, args: [{ selector: 'ng-template[ngbPaginationNext]' },] } ]; NgbPaginationNext.ctorParameters = () => [ { type: TemplateRef } ]; /** * A directive to match the page 'number' link template * * @since 4.1.0 */ export class NgbPaginationNumber { constructor(templateRef) { this.templateRef = templateRef; } } NgbPaginationNumber.decorators = [ { type: Directive, args: [{ selector: 'ng-template[ngbPaginationNumber]' },] } ]; NgbPaginationNumber.ctorParameters = () => [ { type: TemplateRef } ]; /** * A directive to match the 'previous' link template * * @since 4.1.0 */ export class NgbPaginationPrevious { constructor(templateRef) { this.templateRef = templateRef; } } NgbPaginationPrevious.decorators = [ { type: Directive, args: [{ selector: 'ng-template[ngbPaginationPrevious]' },] } ]; NgbPaginationPrevious.ctorParameters = () => [ { type: TemplateRef } ]; /** * A directive to match the 'pages' whole content * * @since 9.1.0 */ export class NgbPaginationPages { constructor(templateRef) { this.templateRef = templateRef; } } NgbPaginationPages.decorators = [ { type: Directive, args: [{ selector: 'ng-template[ngbPaginationPages]' },] } ]; NgbPaginationPages.ctorParameters = () => [ { type: TemplateRef } ]; /** * A component that displays page numbers and allows to customize them in several ways. */ export class NgbPagination { constructor(config) { this.pageCount = 0; this.pages = []; /** * The current page. * * Page numbers start with `1`. */ this.page = 1; /** * An event fired when the page is changed. Will fire only if collection size is set and all values are valid. * * Event payload is the number of the newly selected page. * * Page numbers start with `1`. */ this.pageChange = new EventEmitter(true); this.disabled = config.disabled; this.boundaryLinks = config.boundaryLinks; this.directionLinks = config.directionLinks; this.ellipses = config.ellipses; this.maxSize = config.maxSize; this.pageSize = config.pageSize; this.rotate = config.rotate; this.size = config.size; } hasPrevious() { return this.page > 1; } hasNext() { return this.page < this.pageCount; } nextDisabled() { return !this.hasNext() || this.disabled; } previousDisabled() { return !this.hasPrevious() || this.disabled; } selectPage(pageNumber) { this._updatePages(pageNumber); } ngOnChanges(changes) { this._updatePages(this.page); } isEllipsis(pageNumber) { return pageNumber === -1; } /** * Appends ellipses and first/last page number to the displayed pages */ _applyEllipses(start, end) { if (this.ellipses) { if (start > 0) { // The first page will always be included. If the displayed range // starts after the third page, then add ellipsis. But if the range // starts on the third page, then add the second page instead of // an ellipsis, because the ellipsis would only hide a single page. if (start > 2) { this.pages.unshift(-1); } else if (start === 2) { this.pages.unshift(2); } this.pages.unshift(1); } if (end < this.pageCount) { // The last page will always be included. If the displayed range // ends before the third-last page, then add ellipsis. But if the range // ends on third-last page, then add the second-last page instead of // an ellipsis, because the ellipsis would only hide a single page. if (end < (this.pageCount - 2)) { this.pages.push(-1); } else if (end === (this.pageCount - 2)) { this.pages.push(this.pageCount - 1); } this.pages.push(this.pageCount); } } } /** * Rotates page numbers based on maxSize items visible. * Currently selected page stays in the middle: * * Ex. for selected page = 6: * [5,*6*,7] for maxSize = 3 * [4,5,*6*,7] for maxSize = 4 */ _applyRotation() { let start = 0; let end = this.pageCount; let leftOffset = Math.floor(this.maxSize / 2); let rightOffset = this.maxSize % 2 === 0 ? leftOffset - 1 : leftOffset; if (this.page <= leftOffset) { // very beginning, no rotation -> [0..maxSize] end = this.maxSize; } else if (this.pageCount - this.page < leftOffset) { // very end, no rotation -> [len-maxSize..len] start = this.pageCount - this.maxSize; } else { // rotate start = this.page - leftOffset - 1; end = this.page + rightOffset; } return [start, end]; } /** * Paginates page numbers based on maxSize items per page. */ _applyPagination() { let page = Math.ceil(this.page / this.maxSize) - 1; let start = page * this.maxSize; let end = start + this.maxSize; return [start, end]; } _setPageInRange(newPageNo) { const prevPageNo = this.page; this.page = getValueInRange(newPageNo, this.pageCount, 1); if (this.page !== prevPageNo && isNumber(this.collectionSize)) { this.pageChange.emit(this.page); } } _updatePages(newPage) { this.pageCount = Math.ceil(this.collectionSize / this.pageSize); if (!isNumber(this.pageCount)) { this.pageCount = 0; } // fill-in model needed to render pages this.pages.length = 0; for (let i = 1; i <= this.pageCount; i++) { this.pages.push(i); } // set page within 1..max range this._setPageInRange(newPage); // apply maxSize if necessary if (this.maxSize > 0 && this.pageCount > this.maxSize) { let start = 0; let end = this.pageCount; // either paginating or rotating page numbers if (this.rotate) { [start, end] = this._applyRotation(); } else { [start, end] = this._applyPagination(); } this.pages = this.pages.slice(start, end); // adding ellipses this._applyEllipses(start, end); } } } NgbPagination.decorators = [ { type: Component, args: [{ selector: 'ngb-pagination', changeDetection: ChangeDetectionStrategy.OnPush, host: { 'role': 'navigation' }, template: ` <ng-template #first><span aria-hidden="true" i18n="@@ngb.pagination.first">&laquo;&laquo;</span></ng-template> <ng-template #previous><span aria-hidden="true" i18n="@@ngb.pagination.previous">&laquo;</span></ng-template> <ng-template #next><span aria-hidden="true" i18n="@@ngb.pagination.next">&raquo;</span></ng-template> <ng-template #last><span aria-hidden="true" i18n="@@ngb.pagination.last">&raquo;&raquo;</span></ng-template> <ng-template #ellipsis>...</ng-template> <ng-template #defaultNumber let-page let-currentPage="currentPage"> {{ page }} <span *ngIf="page === currentPage" class="sr-only">(current)</span> </ng-template> <ng-template #defaultPages let-page let-pages="pages" let-disabled="disabled"> <li *ngFor="let pageNumber of pages" class="page-item" [class.active]="pageNumber === page" [class.disabled]="isEllipsis(pageNumber) || disabled" [attr.aria-current]="(pageNumber === page ? 'page' : null)"> <a *ngIf="isEllipsis(pageNumber)" class="page-link" tabindex="-1" aria-disabled="true"> <ng-template [ngTemplateOutlet]="tplEllipsis?.templateRef || ellipsis" [ngTemplateOutletContext]="{disabled: true, currentPage: page}"></ng-template> </a> <a *ngIf="!isEllipsis(pageNumber)" class="page-link" href (click)="selectPage(pageNumber); $event.preventDefault()" [attr.tabindex]="disabled ? '-1' : null" [attr.aria-disabled]="disabled ? 'true' : null"> <ng-template [ngTemplateOutlet]="tplNumber?.templateRef || defaultNumber" [ngTemplateOutletContext]="{disabled: disabled, $implicit: pageNumber, currentPage: page}"></ng-template> </a> </li> </ng-template> <ul [class]="'pagination' + (size ? ' pagination-' + size : '')"> <li *ngIf="boundaryLinks" class="page-item" [class.disabled]="previousDisabled()"> <a aria-label="First" i18n-aria-label="@@ngb.pagination.first-aria" class="page-link" href (click)="selectPage(1); $event.preventDefault()" [attr.tabindex]="previousDisabled() ? '-1' : null" [attr.aria-disabled]="previousDisabled() ? 'true' : null"> <ng-template [ngTemplateOutlet]="tplFirst?.templateRef || first" [ngTemplateOutletContext]="{disabled: previousDisabled(), currentPage: page}"></ng-template> </a> </li> <li *ngIf="directionLinks" class="page-item" [class.disabled]="previousDisabled()"> <a aria-label="Previous" i18n-aria-label="@@ngb.pagination.previous-aria" class="page-link" href (click)="selectPage(page-1); $event.preventDefault()" [attr.tabindex]="previousDisabled() ? '-1' : null" [attr.aria-disabled]="previousDisabled() ? 'true' : null"> <ng-template [ngTemplateOutlet]="tplPrevious?.templateRef || previous" [ngTemplateOutletContext]="{disabled: previousDisabled()}"></ng-template> </a> </li> <ng-template [ngTemplateOutlet]="tplPages?.templateRef || defaultPages" [ngTemplateOutletContext]="{ $implicit: page, pages: pages, disabled: disabled }" > </ng-template> <li *ngIf="directionLinks" class="page-item" [class.disabled]="nextDisabled()"> <a aria-label="Next" i18n-aria-label="@@ngb.pagination.next-aria" class="page-link" href (click)="selectPage(page+1); $event.preventDefault()" [attr.tabindex]="nextDisabled() ? '-1' : null" [attr.aria-disabled]="nextDisabled() ? 'true' : null"> <ng-template [ngTemplateOutlet]="tplNext?.templateRef || next" [ngTemplateOutletContext]="{disabled: nextDisabled(), currentPage: page}"></ng-template> </a> </li> <li *ngIf="boundaryLinks" class="page-item" [class.disabled]="nextDisabled()"> <a aria-label="Last" i18n-aria-label="@@ngb.pagination.last-aria" class="page-link" href (click)="selectPage(pageCount); $event.preventDefault()" [attr.tabindex]="nextDisabled() ? '-1' : null" [attr.aria-disabled]="nextDisabled() ? 'true' : null"> <ng-template [ngTemplateOutlet]="tplLast?.templateRef || last" [ngTemplateOutletContext]="{disabled: nextDisabled(), currentPage: page}"></ng-template> </a> </li> </ul> ` },] } ]; NgbPagination.ctorParameters = () => [ { type: NgbPaginationConfig } ]; NgbPagination.propDecorators = { tplEllipsis: [{ type: ContentChild, args: [NgbPaginationEllipsis, { static: false },] }], tplFirst: [{ type: ContentChild, args: [NgbPaginationFirst, { static: false },] }], tplLast: [{ type: ContentChild, args: [NgbPaginationLast, { static: false },] }], tplNext: [{ type: ContentChild, args: [NgbPaginationNext, { static: false },] }], tplNumber: [{ type: ContentChild, args: [NgbPaginationNumber, { static: false },] }], tplPrevious: [{ type: ContentChild, args: [NgbPaginationPrevious, { static: false },] }], tplPages: [{ type: ContentChild, args: [NgbPaginationPages, { static: false },] }], disabled: [{ type: Input }], boundaryLinks: [{ type: Input }], directionLinks: [{ type: Input }], ellipses: [{ type: Input }], rotate: [{ type: Input }], collectionSize: [{ type: Input }], maxSize: [{ type: Input }], page: [{ type: Input }], pageSize: [{ type: Input }], pageChange: [{ type: Output }], size: [{ type: Input }] }; //# 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NgbPaginationNumberContext extends NgbPaginationLinkContext {\n  /**\n   * The page number, displayed by the current page link.\n   */\n  $implicit: number;\n}\n\n/**\n * A context for the `NgbPaginationPages` pages template in case you want to override\n * the way all pages are displayed.\n *\n * @since 9.1.0\n */\nexport interface NgbPaginationPagesContext {\n  /**\n   * The currently selected page number.\n   */\n  $implicit: number;\n\n  /**\n   * If `true`, pagination is disabled.\n   */\n  disabled: boolean;\n\n  /**\n   * Pages numbers that should be rendered starting with 1.\n   */\n  pages: number[];\n}\n\n/**\n * A directive to match the 'ellipsis' link template\n *\n * @since 4.1.0\n */\n@Directive({selector: 'ng-template[ngbPaginationEllipsis]'})\nexport class NgbPaginationEllipsis {\n  constructor(public templateRef: TemplateRef<NgbPaginationLinkContext>) {}\n}\n\n/**\n * A directive to match the 'first' link template\n *\n * @since 4.1.0\n */\n@Directive({selector: 'ng-template[ngbPaginationFirst]'})\nexport class NgbPaginationFirst {\n  constructor(public templateRef: TemplateRef<NgbPaginationLinkContext>) {}\n}\n\n/**\n * A directive to match the 'last' link template\n *\n * @since 4.1.0\n */\n@Directive({selector: 'ng-template[ngbPaginationLast]'})\nexport class NgbPaginationLast {\n  constructor(public templateRef: TemplateRef<NgbPaginationLinkContext>) {}\n}\n\n/**\n * A directive to match the 'next' link template\n *\n * @since 4.1.0\n */\n@Directive({selector: 'ng-template[ngbPaginationNext]'})\nexport class NgbPaginationNext {\n  constructor(public templateRef: TemplateRef<NgbPaginationLinkContext>) {}\n}\n\n/**\n * A directive to match the page 'number' link template\n *\n * @since 4.1.0\n */\n@Directive({selector: 'ng-template[ngbPaginationNumber]'})\nexport class NgbPaginationNumber {\n  constructor(public templateRef: TemplateRef<NgbPaginationNumberContext>) {}\n}\n\n/**\n * A directive to match the 'previous' link template\n *\n * @since 4.1.0\n */\n@Directive({selector: 'ng-template[ngbPaginationPrevious]'})\nexport class NgbPaginationPrevious {\n  constructor(public templateRef: TemplateRef<NgbPaginationLinkContext>) {}\n}\n\n/**\n * A directive to match the 'pages' whole content\n *\n * @since 9.1.0\n */\n@Directive({selector: 'ng-template[ngbPaginationPages]'})\nexport class NgbPaginationPages {\n  constructor(public templateRef: TemplateRef<NgbPaginationPagesContext>) {}\n}\n\n/**\n * A component that displays page numbers and allows to customize them in several ways.\n */\n@Component({\n  selector: 'ngb-pagination',\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  host: {'role': 'navigation'},\n  template: `\n    <ng-template #first><span aria-hidden=\"true\" i18n=\"@@ngb.pagination.first\">&laquo;&laquo;</span></ng-template>\n    <ng-template #previous><span aria-hidden=\"true\" i18n=\"@@ngb.pagination.previous\">&laquo;</span></ng-template>\n    <ng-template #next><span aria-hidden=\"true\" i18n=\"@@ngb.pagination.next\">&raquo;</span></ng-template>\n    <ng-template #last><span aria-hidden=\"true\" i18n=\"@@ngb.pagination.last\">&raquo;&raquo;</span></ng-template>\n    <ng-template #ellipsis>...</ng-template>\n    <ng-template #defaultNumber let-page let-currentPage=\"currentPage\">\n      {{ page }}\n      <span *ngIf=\"page === currentPage\" class=\"sr-only\">(current)</span>\n    </ng-template>\n    <ng-template #defaultPages let-page let-pages=\"pages\" let-disabled=\"disabled\">\n      <li *ngFor=\"let pageNumber of pages\" class=\"page-item\" [class.active]=\"pageNumber === page\"\n        [class.disabled]=\"isEllipsis(pageNumber) || disabled\" [attr.aria-current]=\"(pageNumber === page ? 'page' : null)\">\n        <a *ngIf=\"isEllipsis(pageNumber)\" class=\"page-link\" tabindex=\"-1\" aria-disabled=\"true\">\n          <ng-template [ngTemplateOutlet]=\"tplEllipsis?.templateRef || ellipsis\"\n                      [ngTemplateOutletContext]=\"{disabled: true, currentPage: page}\"></ng-template>\n        </a>\n        <a *ngIf=\"!isEllipsis(pageNumber)\" class=\"page-link\" href (click)=\"selectPage(pageNumber); $event.preventDefault()\"\n          [attr.tabindex]=\"disabled ? '-1' : null\" [attr.aria-disabled]=\"disabled ? 'true' : null\">\n          <ng-template [ngTemplateOutlet]=\"tplNumber?.templateRef || defaultNumber\"\n                      [ngTemplateOutletContext]=\"{disabled: disabled, $implicit: pageNumber, currentPage: page}\"></ng-template>\n        </a>\n      </li>\n    </ng-template>\n    <ul [class]=\"'pagination' + (size ? ' pagination-' + size : '')\">\n      <li *ngIf=\"boundaryLinks\" class=\"page-item\"\n        [class.disabled]=\"previousDisabled()\">\n        <a aria-label=\"First\" i18n-aria-label=\"@@ngb.pagination.first-aria\" class=\"page-link\" href\n          (click)=\"selectPage(1); $event.preventDefault()\" [attr.tabindex]=\"previousDisabled() ? '-1' : null\"\n          [attr.aria-disabled]=\"previousDisabled() ? 'true' : null\">\n          <ng-template [ngTemplateOutlet]=\"tplFirst?.templateRef || first\"\n                       [ngTemplateOutletContext]=\"{disabled: previousDisabled(), currentPage: page}\"></ng-template>\n        </a>\n      </li>\n\n      <li *ngIf=\"directionLinks\" class=\"page-item\"\n        [class.disabled]=\"previousDisabled()\">\n        <a aria-label=\"Previous\" i18n-aria-label=\"@@ngb.pagination.previous-aria\" class=\"page-link\" href\n          (click)=\"selectPage(page-1); $event.preventDefault()\" [attr.tabindex]=\"previousDisabled() ? '-1' : null\"\n          [attr.aria-disabled]=\"previousDisabled() ? 'true' : null\">\n          <ng-template [ngTemplateOutlet]=\"tplPrevious?.templateRef || previous\"\n                       [ngTemplateOutletContext]=\"{disabled: previousDisabled()}\"></ng-template>\n        </a>\n      </li>\n      <ng-template\n        [ngTemplateOutlet]=\"tplPages?.templateRef || defaultPages\"\n        [ngTemplateOutletContext]=\"{ $implicit: page, pages: pages, disabled: disabled }\"\n      >\n      </ng-template>\n      <li *ngIf=\"directionLinks\" class=\"page-item\" [class.disabled]=\"nextDisabled()\">\n        <a aria-label=\"Next\" i18n-aria-label=\"@@ngb.pagination.next-aria\" class=\"page-link\" href\n          (click)=\"selectPage(page+1); $event.preventDefault()\" [attr.tabindex]=\"nextDisabled() ? '-1' : null\"\n          [attr.aria-disabled]=\"nextDisabled() ? 'true' : null\">\n          <ng-template [ngTemplateOutlet]=\"tplNext?.templateRef || next\"\n                       [ngTemplateOutletContext]=\"{disabled: nextDisabled(), currentPage: page}\"></ng-template>\n        </a>\n      </li>\n\n      <li *ngIf=\"boundaryLinks\" class=\"page-item\" [class.disabled]=\"nextDisabled()\">\n        <a aria-label=\"Last\" i18n-aria-label=\"@@ngb.pagination.last-aria\" class=\"page-link\" href\n          (click)=\"selectPage(pageCount); $event.preventDefault()\" [attr.tabindex]=\"nextDisabled() ? '-1' : null\"\n          [attr.aria-disabled]=\"nextDisabled() ? 'true' : null\">\n          <ng-template [ngTemplateOutlet]=\"tplLast?.templateRef || last\"\n                       [ngTemplateOutletContext]=\"{disabled: nextDisabled(), currentPage: page}\"></ng-template>\n        </a>\n      </li>\n    </ul>\n  `\n})\nexport class NgbPagination implements OnChanges {\n  pageCount = 0;\n  pages: number[] = [];\n\n  @ContentChild(NgbPaginationEllipsis, {static: false}) tplEllipsis: NgbPaginationEllipsis;\n  @ContentChild(NgbPaginationFirst, {static: false}) tplFirst: NgbPaginationFirst;\n  @ContentChild(NgbPaginationLast, {static: false}) tplLast: NgbPaginationLast;\n  @ContentChild(NgbPaginationNext, {static: false}) tplNext: NgbPaginationNext;\n  @ContentChild(NgbPaginationNumber, {static: false}) tplNumber: NgbPaginationNumber;\n  @ContentChild(NgbPaginationPrevious, {static: false}) tplPrevious: NgbPaginationPrevious;\n  @ContentChild(NgbPaginationPages, {static: false}) tplPages: NgbPaginationPages;\n\n  /**\n   * If `true`, pagination links will be disabled.\n   */\n  @Input() disabled: boolean;\n\n  /**\n   * If `true`, the \"First\" and \"Last\" page links are shown.\n   */\n  @Input() boundaryLinks: boolean;\n\n  /**\n   * If `true`, the \"Next\" and \"Previous\" page links are shown.\n   */\n  @Input() directionLinks: boolean;\n\n  /**\n   * If `true`, the ellipsis symbols and first/last page numbers will be shown when `maxSize` > number of pages.\n   */\n  @Input() ellipses: boolean;\n\n  /**\n   * Whether to rotate pages when `maxSize` > number of pages.\n   *\n   * The current page always stays in the middle if `true`.\n   */\n  @Input() rotate: boolean;\n\n  /**\n   *  The number of items in your paginated collection.\n   *\n   *  Note, that this is not the number of pages. Page numbers are calculated dynamically based on\n   *  `collectionSize` and `pageSize`. Ex. if you have 100 items in your collection and displaying 20 items per page,\n   *  you'll end up with 5 pages.\n   */\n  @Input() collectionSize: number;\n\n  /**\n   *  The maximum number of pages to display.\n   */\n  @Input() maxSize: number;\n\n  /**\n   *  The current page.\n   *\n   *  Page numbers start with `1`.\n   */\n  @Input() page = 1;\n\n  /**\n   *  The number of items per page.\n   */\n  @Input() pageSize: number;\n\n  /**\n   *  An event fired when the page is changed. Will fire only if collection size is set and all values are valid.\n   *\n   *  Event payload is the number of the newly selected page.\n   *\n   *  Page numbers start with `1`.\n   */\n  @Output() pageChange = new EventEmitter<number>(true);\n\n  /**\n   * The pagination display size.\n   *\n   * Bootstrap currently supports small and large sizes.\n   */\n  @Input() size: 'sm' | 'lg';\n\n  constructor(config: NgbPaginationConfig) {\n    this.disabled = config.disabled;\n    this.boundaryLinks = config.boundaryLinks;\n    this.directionLinks = config.directionLinks;\n    this.ellipses = config.ellipses;\n    this.maxSize = config.maxSize;\n    this.pageSize = config.pageSize;\n    this.rotate = config.rotate;\n    this.size = config.size;\n  }\n\n  hasPrevious(): boolean { return this.page > 1; }\n\n  hasNext(): boolean { return this.page < this.pageCount; }\n\n  nextDisabled(): boolean { return !this.hasNext() || this.disabled; }\n\n  previousDisabled(): boolean { return !this.hasPrevious() || this.disabled; }\n\n  selectPage(pageNumber: number): void { this._updatePages(pageNumber); }\n\n  ngOnChanges(changes: SimpleChanges): void { this._updatePages(this.page); }\n\n  isEllipsis(pageNumber): boolean { return pageNumber === -1; }\n\n  /**\n   * Appends ellipses and first/last page number to the displayed pages\n   */\n  private _applyEllipses(start: number, end: number) {\n    if (this.ellipses) {\n      if (start > 0) {\n        // The first page will always be included. If the displayed range\n        // starts after the third page, then add ellipsis. But if the range\n        // starts on the third page, then add the second page instead of\n        // an ellipsis, because the ellipsis would only hide a single page.\n        if (start > 2) {\n          this.pages.unshift(-1);\n        } else if (start === 2) {\n          this.pages.unshift(2);\n        }\n        this.pages.unshift(1);\n      }\n      if (end < this.pageCount) {\n        // The last page will always be included. If the displayed range\n        // ends before the third-last page, then add ellipsis. But if the range\n        // ends on third-last page, then add the second-last page instead of\n        // an ellipsis, because the ellipsis would only hide a single page.\n        if (end < (this.pageCount - 2)) {\n          this.pages.push(-1);\n        } else if (end === (this.pageCount - 2)) {\n          this.pages.push(this.pageCount - 1);\n        }\n        this.pages.push(this.pageCount);\n      }\n    }\n  }\n\n  /**\n   * Rotates page numbers based on maxSize items visible.\n   * Currently selected page stays in the middle:\n   *\n   * Ex. for selected page = 6:\n   * [5,*6*,7] for maxSize = 3\n   * [4,5,*6*,7] for maxSize = 4\n   */\n  private _applyRotation(): [number, number] {\n    let start = 0;\n    let end = this.pageCount;\n    let leftOffset = Math.floor(this.maxSize / 2);\n    let rightOffset = this.maxSize % 2 === 0 ? leftOffset - 1 : leftOffset;\n\n    if (this.page <= leftOffset) {\n      // very beginning, no rotation -> [0..maxSize]\n      end = this.maxSize;\n    } else if (this.pageCount - this.page < leftOffset) {\n      // very end, no rotation -> [len-maxSize..len]\n      start = this.pageCount - this.maxSize;\n    } else {\n      // rotate\n      start = this.page - leftOffset - 1;\n      end = this.page + rightOffset;\n    }\n\n    return [start, end];\n  }\n\n  /**\n   * Paginates page numbers based on maxSize items per page.\n   */\n  private _applyPagination(): [number, number] {\n    let page = Math.ceil(this.page / this.maxSize) - 1;\n    let start = page * this.maxSize;\n    let end = start + this.maxSize;\n\n    return [start, end];\n  }\n\n  private _setPageInRange(newPageNo) {\n    const prevPageNo = this.page;\n    this.page = getValueInRange(newPageNo, this.pageCount, 1);\n\n    if (this.page !== prevPageNo && isNumber(this.collectionSize)) {\n      this.pageChange.emit(this.page);\n    }\n  }\n\n  private _updatePages(newPage: number) {\n    this.pageCount = Math.ceil(this.collectionSize / this.pageSize);\n\n    if (!isNumber(this.pageCount)) {\n      this.pageCount = 0;\n    }\n\n    // fill-in model needed to render pages\n    this.pages.length = 0;\n    for (let i = 1; i <= this.pageCount; i++) {\n      this.pages.push(i);\n    }\n\n    // set page within 1..max range\n    this._setPageInRange(newPage);\n\n    // apply maxSize if necessary\n    if (this.maxSize > 0 && this.pageCount > this.maxSize) {\n      let start = 0;\n      let end = this.pageCount;\n\n      // either paginating or rotating page numbers\n      if (this.rotate) {\n        [start, end] = this._applyRotation();\n      } else {\n        [start, end] = this._applyPagination();\n      }\n\n      this.pages = this.pages.slice(start, end);\n\n      // adding ellipses\n      this._applyEllipses(start, end);\n    }\n  }\n}\n"]}