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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 | 1x 1x 6x 6x 6x 6x 6x 6x 6x 6x 5x 7x 6x 7x 6x 7x 7x 7x 7x 4x 16x 3x 1x 5x 1x 1x 2x 1x 1x 1x 5x 1x 1x 1x 3x 1x 1x 7x 6x 2x 2x 2x | /**
* Copyright (c) Siemens 2016 - 2025
* SPDX-License-Identifier: MIT
*/
import { ChangeDetectionStrategy, Component, computed, input, model } from '@angular/core';
import { addIcons, elementLeft3, elementRight3, SiIconComponent } from '@siemens/element-ng/icon';
import { SiTranslatePipe, t } from '@siemens/element-translate-ng/translate';
@Component({
selector: 'si-pagination',
imports: [SiIconComponent, SiTranslatePipe],
templateUrl: './si-pagination.component.html',
changeDetection: ChangeDetectionStrategy.OnPush
})
export class SiPaginationComponent {
private static maxItems = 7;
/**
* The total number of pages.
* Alternatively use `itemsPerPage` and `totalItems`
*/
readonly totalPages = input<number>();
/**
* The current active page, counting starts from 1
*
* @defaultValue 1
*/
readonly currentPage = model<number>(1);
/**
* The number of items per page.
* Used to calculate the total number of page if `totalPages` is not available
*/
readonly pageSize = input<number>();
/**
* The total number of items.
* Used to calculate the total number of page if `totalPages` is not available
*/
readonly totalRowCount = input<number>();
/**
* The text of the back button for pagination. Required for a11y.
*
* @defaultValue
* ```
* t(() => $localize`:@@SI_PAGINATION.BACK:Back`)
* ```
*/
readonly backButtonText = input(t(() => $localize`:@@SI_PAGINATION.BACK:Back`));
/**
* The text of the forward button for pagination. Required for a11y.
*
* @defaultValue
* ```
* t(() => $localize`:@@SI_PAGINATION.FORWARD:Forward`)
* ```
*/
readonly forwardButtonText = input(t(() => $localize`:@@SI_PAGINATION.FORWARD:Forward`));
/**
* When multiple paginations are used on the same page each pagination needs a distinct aria label.
* Required for a11y.
*
* @defaultValue
* ```
* t(() => $localize`:@@SI_PAGINATION.NAV_LABEL:Pagination`)
* ```
*/
readonly navAriaLabel = input(t(() => $localize`:@@SI_PAGINATION.NAV_LABEL:Pagination`));
private readonly calculatedTotalPages = computed(
() => this.totalPages() ?? Math.ceil((this.totalRowCount() ?? 0) / (this.pageSize() ?? 1))
);
protected readonly prevDisabled = computed(() => this.currentPage() === 1);
protected readonly nextDisabled = computed(
() => this.currentPage() === this.calculatedTotalPages()
);
protected readonly pageButtons = computed(() => {
const pageButtons: { page: number; sep: boolean }[] = [];
const totalPages = this.calculatedTotalPages();
const currentPage = this.currentPage();
if (totalPages <= SiPaginationComponent.maxItems) {
for (let i = 0; i < totalPages; i++) {
pageButtons.push({ page: i + 1, sep: false });
}
} else if (currentPage < SiPaginationComponent.maxItems - 2) {
// separator only on the right (in LTR)
for (let i = 0; i < SiPaginationComponent.maxItems - 2; i++) {
pageButtons.push({ page: i + 1, sep: false });
}
pageButtons.push({ page: 0, sep: true });
pageButtons.push({ page: totalPages, sep: false });
} else if (currentPage >= totalPages - 3) {
// separator only on the left (in LTR)
pageButtons.push({ page: 1, sep: false });
pageButtons.push({ page: 0, sep: true });
for (let i = totalPages - SiPaginationComponent.maxItems + 2; i < totalPages; i++) {
pageButtons.push({ page: i + 1, sep: false });
}
} else {
// separator on both sides
pageButtons.push({ page: 1, sep: false });
pageButtons.push({ page: 0, sep: true });
for (let i = -1; i <= 1; i++) {
pageButtons.push({ page: currentPage + i, sep: false });
}
pageButtons.push({ page: 0, sep: true });
pageButtons.push({ page: totalPages, sep: false });
}
return pageButtons;
});
protected readonly icons = addIcons({ elementLeft3, elementRight3 });
protected direction(event: Event, delta: number): void {
this.setPage(event, this.currentPage() + delta);
}
protected setPage(event: Event, page: number): void {
(event.currentTarget as HTMLElement).blur();
this.currentPage.set(page);
}
}
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