@swimlane/ngx-datatable
Version:
ngx-datatable is an Angular table grid component for presenting large and complex data.
136 lines • 13.3 kB
JavaScript
import { Component, Input, Output, EventEmitter, ChangeDetectionStrategy } from '@angular/core';
export class DataTablePagerComponent {
constructor() {
this.change = new EventEmitter();
this._count = 0;
this._page = 1;
this._size = 0;
}
set size(val) {
this._size = val;
this.pages = this.calcPages();
}
get size() {
return this._size;
}
set count(val) {
this._count = val;
this.pages = this.calcPages();
}
get count() {
return this._count;
}
set page(val) {
this._page = val;
this.pages = this.calcPages();
}
get page() {
return this._page;
}
get totalPages() {
const count = this.size < 1 ? 1 : Math.ceil(this.count / this.size);
return Math.max(count || 0, 1);
}
canPrevious() {
return this.page > 1;
}
canNext() {
return this.page < this.totalPages;
}
prevPage() {
this.selectPage(this.page - 1);
}
nextPage() {
this.selectPage(this.page + 1);
}
selectPage(page) {
if (page > 0 && page <= this.totalPages && page !== this.page) {
this.page = page;
this.change.emit({
page
});
}
}
calcPages(page) {
const pages = [];
let startPage = 1;
let endPage = this.totalPages;
const maxSize = 5;
const isMaxSized = maxSize < this.totalPages;
page = page || this.page;
if (isMaxSized) {
startPage = page - Math.floor(maxSize / 2);
endPage = page + Math.floor(maxSize / 2);
if (startPage < 1) {
startPage = 1;
endPage = Math.min(startPage + maxSize - 1, this.totalPages);
}
else if (endPage > this.totalPages) {
startPage = Math.max(this.totalPages - maxSize + 1, 1);
endPage = this.totalPages;
}
}
for (let num = startPage; num <= endPage; num++) {
pages.push({
number: num,
text: num
});
}
return pages;
}
}
DataTablePagerComponent.decorators = [
{ type: Component, args: [{
selector: 'datatable-pager',
template: `
<ul class="pager">
<li [class.disabled]="!canPrevious()">
<a role="button" aria-label="go to first page" href="javascript:void(0)" (click)="selectPage(1)">
<i class="{{ pagerPreviousIcon }}"></i>
</a>
</li>
<li [class.disabled]="!canPrevious()">
<a role="button" aria-label="go to previous page" href="javascript:void(0)" (click)="prevPage()">
<i class="{{ pagerLeftArrowIcon }}"></i>
</a>
</li>
<li
role="button"
[attr.aria-label]="'page ' + pg.number"
class="pages"
*ngFor="let pg of pages"
[class.active]="pg.number === page"
>
<a href="javascript:void(0)" (click)="selectPage(pg.number)">
{{ pg.text }}
</a>
</li>
<li [class.disabled]="!canNext()">
<a role="button" aria-label="go to next page" href="javascript:void(0)" (click)="nextPage()">
<i class="{{ pagerRightArrowIcon }}"></i>
</a>
</li>
<li [class.disabled]="!canNext()">
<a role="button" aria-label="go to last page" href="javascript:void(0)" (click)="selectPage(totalPages)">
<i class="{{ pagerNextIcon }}"></i>
</a>
</li>
</ul>
`,
host: {
class: 'datatable-pager'
},
changeDetection: ChangeDetectionStrategy.OnPush
},] }
];
DataTablePagerComponent.propDecorators = {
pagerLeftArrowIcon: [{ type: Input }],
pagerRightArrowIcon: [{ type: Input }],
pagerPreviousIcon: [{ type: Input }],
pagerNextIcon: [{ type: Input }],
size: [{ type: Input }],
count: [{ type: Input }],
page: [{ type: Input }],
change: [{ type: Output }]
};
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{ Component, Input, Output, EventEmitter, ChangeDetectionStrategy } from '@angular/core';\n\n@Component({\n  selector: 'datatable-pager',\n  template: `\n    <ul class=\"pager\">\n      <li [class.disabled]=\"!canPrevious()\">\n        <a role=\"button\" aria-label=\"go to first page\" href=\"javascript:void(0)\" (click)=\"selectPage(1)\">\n          <i class=\"{{ pagerPreviousIcon }}\"></i>\n        </a>\n      </li>\n      <li [class.disabled]=\"!canPrevious()\">\n        <a role=\"button\" aria-label=\"go to previous page\" href=\"javascript:void(0)\" (click)=\"prevPage()\">\n          <i class=\"{{ pagerLeftArrowIcon }}\"></i>\n        </a>\n      </li>\n      <li\n        role=\"button\"\n        [attr.aria-label]=\"'page ' + pg.number\"\n        class=\"pages\"\n        *ngFor=\"let pg of pages\"\n        [class.active]=\"pg.number === page\"\n      >\n        <a href=\"javascript:void(0)\" (click)=\"selectPage(pg.number)\">\n          {{ pg.text }}\n        </a>\n      </li>\n      <li [class.disabled]=\"!canNext()\">\n        <a role=\"button\" aria-label=\"go to next page\" href=\"javascript:void(0)\" (click)=\"nextPage()\">\n          <i class=\"{{ pagerRightArrowIcon }}\"></i>\n        </a>\n      </li>\n      <li [class.disabled]=\"!canNext()\">\n        <a role=\"button\" aria-label=\"go to last page\" href=\"javascript:void(0)\" (click)=\"selectPage(totalPages)\">\n          <i class=\"{{ pagerNextIcon }}\"></i>\n        </a>\n      </li>\n    </ul>\n  `,\n  host: {\n    class: 'datatable-pager'\n  },\n  changeDetection: ChangeDetectionStrategy.OnPush\n})\nexport class DataTablePagerComponent {\n  @Input() pagerLeftArrowIcon: string;\n  @Input() pagerRightArrowIcon: string;\n  @Input() pagerPreviousIcon: string;\n  @Input() pagerNextIcon: string;\n\n  @Input()\n  set size(val: number) {\n    this._size = val;\n    this.pages = this.calcPages();\n  }\n\n  get size(): number {\n    return this._size;\n  }\n\n  @Input()\n  set count(val: number) {\n    this._count = val;\n    this.pages = this.calcPages();\n  }\n\n  get count(): number {\n    return this._count;\n  }\n\n  @Input()\n  set page(val: number) {\n    this._page = val;\n    this.pages = this.calcPages();\n  }\n\n  get page(): number {\n    return this._page;\n  }\n\n  get totalPages(): number {\n    const count = this.size < 1 ? 1 : Math.ceil(this.count / this.size);\n    return Math.max(count || 0, 1);\n  }\n\n  @Output() change: EventEmitter<any> = new EventEmitter();\n\n  _count: number = 0;\n  _page: number = 1;\n  _size: number = 0;\n  pages: any;\n\n  canPrevious(): boolean {\n    return this.page > 1;\n  }\n\n  canNext(): boolean {\n    return this.page < this.totalPages;\n  }\n\n  prevPage(): void {\n    this.selectPage(this.page - 1);\n  }\n\n  nextPage(): void {\n    this.selectPage(this.page + 1);\n  }\n\n  selectPage(page: number): void {\n    if (page > 0 && page <= this.totalPages && page !== this.page) {\n      this.page = page;\n\n      this.change.emit({\n        page\n      });\n    }\n  }\n\n  calcPages(page?: number): any[] {\n    const pages = [];\n    let startPage = 1;\n    let endPage = this.totalPages;\n    const maxSize = 5;\n    const isMaxSized = maxSize < this.totalPages;\n\n    page = page || this.page;\n\n    if (isMaxSized) {\n      startPage = page - Math.floor(maxSize / 2);\n      endPage = page + Math.floor(maxSize / 2);\n\n      if (startPage < 1) {\n        startPage = 1;\n        endPage = Math.min(startPage + maxSize - 1, this.totalPages);\n      } else if (endPage > this.totalPages) {\n        startPage = Math.max(this.totalPages - maxSize + 1, 1);\n        endPage = this.totalPages;\n      }\n    }\n\n    for (let num = startPage; num <= endPage; num++) {\n      pages.push({\n        number: num,\n        text: <string>(<any>num)\n      });\n    }\n\n    return pages;\n  }\n}\n"]}