pagination.js 48 KB

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  1. /**
  2. * @fileoverview added by tsickle
  3. * @suppress {checkTypes,constantProperty,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
  4. */
  5. import * as tslib_1 from "tslib";
  6. import { Component, ContentChild, Directive, EventEmitter, Input, Output, ChangeDetectionStrategy, TemplateRef } from '@angular/core';
  7. import { getValueInRange, isNumber } from '../util/util';
  8. import { NgbPaginationConfig } from './pagination-config';
  9. /**
  10. * A context for the
  11. * * `NgbPaginationFirst`
  12. * * `NgbPaginationPrevious`
  13. * * `NgbPaginationNext`
  14. * * `NgbPaginationLast`
  15. * * `NgbPaginationEllipsis`
  16. *
  17. * link templates in case you want to override one.
  18. *
  19. * \@since 4.1.0
  20. * @record
  21. */
  22. export function NgbPaginationLinkContext() { }
  23. if (false) {
  24. /**
  25. * The currently selected page number
  26. * @type {?}
  27. */
  28. NgbPaginationLinkContext.prototype.currentPage;
  29. /**
  30. * If `true`, the current link is disabled
  31. * @type {?}
  32. */
  33. NgbPaginationLinkContext.prototype.disabled;
  34. }
  35. /**
  36. * A context for the `NgbPaginationNumber` link template in case you want to override one.
  37. *
  38. * Extends `NgbPaginationLinkContext`.
  39. *
  40. * \@since 4.1.0
  41. * @record
  42. */
  43. export function NgbPaginationNumberContext() { }
  44. if (false) {
  45. /**
  46. * The page number, displayed by the current page link.
  47. * @type {?}
  48. */
  49. NgbPaginationNumberContext.prototype.$implicit;
  50. }
  51. /**
  52. * A directive to match the 'ellipsis' link template
  53. *
  54. * \@since 4.1.0
  55. */
  56. var NgbPaginationEllipsis = /** @class */ (function () {
  57. function NgbPaginationEllipsis(templateRef) {
  58. this.templateRef = templateRef;
  59. }
  60. NgbPaginationEllipsis.decorators = [
  61. { type: Directive, args: [{ selector: 'ng-template[ngbPaginationEllipsis]' },] }
  62. ];
  63. /** @nocollapse */
  64. NgbPaginationEllipsis.ctorParameters = function () { return [
  65. { type: TemplateRef }
  66. ]; };
  67. return NgbPaginationEllipsis;
  68. }());
  69. export { NgbPaginationEllipsis };
  70. if (false) {
  71. /** @type {?} */
  72. NgbPaginationEllipsis.prototype.templateRef;
  73. }
  74. /**
  75. * A directive to match the 'first' link template
  76. *
  77. * \@since 4.1.0
  78. */
  79. var NgbPaginationFirst = /** @class */ (function () {
  80. function NgbPaginationFirst(templateRef) {
  81. this.templateRef = templateRef;
  82. }
  83. NgbPaginationFirst.decorators = [
  84. { type: Directive, args: [{ selector: 'ng-template[ngbPaginationFirst]' },] }
  85. ];
  86. /** @nocollapse */
  87. NgbPaginationFirst.ctorParameters = function () { return [
  88. { type: TemplateRef }
  89. ]; };
  90. return NgbPaginationFirst;
  91. }());
  92. export { NgbPaginationFirst };
  93. if (false) {
  94. /** @type {?} */
  95. NgbPaginationFirst.prototype.templateRef;
  96. }
  97. /**
  98. * A directive to match the 'last' link template
  99. *
  100. * \@since 4.1.0
  101. */
  102. var NgbPaginationLast = /** @class */ (function () {
  103. function NgbPaginationLast(templateRef) {
  104. this.templateRef = templateRef;
  105. }
  106. NgbPaginationLast.decorators = [
  107. { type: Directive, args: [{ selector: 'ng-template[ngbPaginationLast]' },] }
  108. ];
  109. /** @nocollapse */
  110. NgbPaginationLast.ctorParameters = function () { return [
  111. { type: TemplateRef }
  112. ]; };
  113. return NgbPaginationLast;
  114. }());
  115. export { NgbPaginationLast };
  116. if (false) {
  117. /** @type {?} */
  118. NgbPaginationLast.prototype.templateRef;
  119. }
  120. /**
  121. * A directive to match the 'next' link template
  122. *
  123. * \@since 4.1.0
  124. */
  125. var NgbPaginationNext = /** @class */ (function () {
  126. function NgbPaginationNext(templateRef) {
  127. this.templateRef = templateRef;
  128. }
  129. NgbPaginationNext.decorators = [
  130. { type: Directive, args: [{ selector: 'ng-template[ngbPaginationNext]' },] }
  131. ];
  132. /** @nocollapse */
  133. NgbPaginationNext.ctorParameters = function () { return [
  134. { type: TemplateRef }
  135. ]; };
  136. return NgbPaginationNext;
  137. }());
  138. export { NgbPaginationNext };
  139. if (false) {
  140. /** @type {?} */
  141. NgbPaginationNext.prototype.templateRef;
  142. }
  143. /**
  144. * A directive to match the page 'number' link template
  145. *
  146. * \@since 4.1.0
  147. */
  148. var NgbPaginationNumber = /** @class */ (function () {
  149. function NgbPaginationNumber(templateRef) {
  150. this.templateRef = templateRef;
  151. }
  152. NgbPaginationNumber.decorators = [
  153. { type: Directive, args: [{ selector: 'ng-template[ngbPaginationNumber]' },] }
  154. ];
  155. /** @nocollapse */
  156. NgbPaginationNumber.ctorParameters = function () { return [
  157. { type: TemplateRef }
  158. ]; };
  159. return NgbPaginationNumber;
  160. }());
  161. export { NgbPaginationNumber };
  162. if (false) {
  163. /** @type {?} */
  164. NgbPaginationNumber.prototype.templateRef;
  165. }
  166. /**
  167. * A directive to match the 'previous' link template
  168. *
  169. * \@since 4.1.0
  170. */
  171. var NgbPaginationPrevious = /** @class */ (function () {
  172. function NgbPaginationPrevious(templateRef) {
  173. this.templateRef = templateRef;
  174. }
  175. NgbPaginationPrevious.decorators = [
  176. { type: Directive, args: [{ selector: 'ng-template[ngbPaginationPrevious]' },] }
  177. ];
  178. /** @nocollapse */
  179. NgbPaginationPrevious.ctorParameters = function () { return [
  180. { type: TemplateRef }
  181. ]; };
  182. return NgbPaginationPrevious;
  183. }());
  184. export { NgbPaginationPrevious };
  185. if (false) {
  186. /** @type {?} */
  187. NgbPaginationPrevious.prototype.templateRef;
  188. }
  189. /**
  190. * A component that displays page numbers and allows to customize them in several ways.
  191. */
  192. var NgbPagination = /** @class */ (function () {
  193. function NgbPagination(config) {
  194. this.pageCount = 0;
  195. this.pages = [];
  196. /**
  197. * The current page.
  198. *
  199. * Page numbers start with `1`.
  200. */
  201. this.page = 1;
  202. /**
  203. * An event fired when the page is changed. Will fire only if collection size is set and all values are valid.
  204. *
  205. * Event payload is the number of the newly selected page.
  206. *
  207. * Page numbers start with `1`.
  208. */
  209. this.pageChange = new EventEmitter(true);
  210. this.disabled = config.disabled;
  211. this.boundaryLinks = config.boundaryLinks;
  212. this.directionLinks = config.directionLinks;
  213. this.ellipses = config.ellipses;
  214. this.maxSize = config.maxSize;
  215. this.pageSize = config.pageSize;
  216. this.rotate = config.rotate;
  217. this.size = config.size;
  218. }
  219. /**
  220. * @return {?}
  221. */
  222. NgbPagination.prototype.hasPrevious = /**
  223. * @return {?}
  224. */
  225. function () { return this.page > 1; };
  226. /**
  227. * @return {?}
  228. */
  229. NgbPagination.prototype.hasNext = /**
  230. * @return {?}
  231. */
  232. function () { return this.page < this.pageCount; };
  233. /**
  234. * @return {?}
  235. */
  236. NgbPagination.prototype.nextDisabled = /**
  237. * @return {?}
  238. */
  239. function () { return !this.hasNext() || this.disabled; };
  240. /**
  241. * @return {?}
  242. */
  243. NgbPagination.prototype.previousDisabled = /**
  244. * @return {?}
  245. */
  246. function () { return !this.hasPrevious() || this.disabled; };
  247. /**
  248. * @param {?} pageNumber
  249. * @return {?}
  250. */
  251. NgbPagination.prototype.selectPage = /**
  252. * @param {?} pageNumber
  253. * @return {?}
  254. */
  255. function (pageNumber) { this._updatePages(pageNumber); };
  256. /**
  257. * @param {?} changes
  258. * @return {?}
  259. */
  260. NgbPagination.prototype.ngOnChanges = /**
  261. * @param {?} changes
  262. * @return {?}
  263. */
  264. function (changes) { this._updatePages(this.page); };
  265. /**
  266. * @param {?} pageNumber
  267. * @return {?}
  268. */
  269. NgbPagination.prototype.isEllipsis = /**
  270. * @param {?} pageNumber
  271. * @return {?}
  272. */
  273. function (pageNumber) { return pageNumber === -1; };
  274. /**
  275. * Appends ellipses and first/last page number to the displayed pages
  276. */
  277. /**
  278. * Appends ellipses and first/last page number to the displayed pages
  279. * @private
  280. * @param {?} start
  281. * @param {?} end
  282. * @return {?}
  283. */
  284. NgbPagination.prototype._applyEllipses = /**
  285. * Appends ellipses and first/last page number to the displayed pages
  286. * @private
  287. * @param {?} start
  288. * @param {?} end
  289. * @return {?}
  290. */
  291. function (start, end) {
  292. if (this.ellipses) {
  293. if (start > 0) {
  294. // The first page will always be included. If the displayed range
  295. // starts after the third page, then add ellipsis. But if the range
  296. // starts on the third page, then add the second page instead of
  297. // an ellipsis, because the ellipsis would only hide a single page.
  298. if (start > 2) {
  299. this.pages.unshift(-1);
  300. }
  301. else if (start === 2) {
  302. this.pages.unshift(2);
  303. }
  304. this.pages.unshift(1);
  305. }
  306. if (end < this.pageCount) {
  307. // The last page will always be included. If the displayed range
  308. // ends before the third-last page, then add ellipsis. But if the range
  309. // ends on third-last page, then add the second-last page instead of
  310. // an ellipsis, because the ellipsis would only hide a single page.
  311. if (end < (this.pageCount - 2)) {
  312. this.pages.push(-1);
  313. }
  314. else if (end === (this.pageCount - 2)) {
  315. this.pages.push(this.pageCount - 1);
  316. }
  317. this.pages.push(this.pageCount);
  318. }
  319. }
  320. };
  321. /**
  322. * Rotates page numbers based on maxSize items visible.
  323. * Currently selected page stays in the middle:
  324. *
  325. * Ex. for selected page = 6:
  326. * [5,*6*,7] for maxSize = 3
  327. * [4,5,*6*,7] for maxSize = 4
  328. */
  329. /**
  330. * Rotates page numbers based on maxSize items visible.
  331. * Currently selected page stays in the middle:
  332. *
  333. * Ex. for selected page = 6:
  334. * [5,*6*,7] for maxSize = 3
  335. * [4,5,*6*,7] for maxSize = 4
  336. * @private
  337. * @return {?}
  338. */
  339. NgbPagination.prototype._applyRotation = /**
  340. * Rotates page numbers based on maxSize items visible.
  341. * Currently selected page stays in the middle:
  342. *
  343. * Ex. for selected page = 6:
  344. * [5,*6*,7] for maxSize = 3
  345. * [4,5,*6*,7] for maxSize = 4
  346. * @private
  347. * @return {?}
  348. */
  349. function () {
  350. /** @type {?} */
  351. var start = 0;
  352. /** @type {?} */
  353. var end = this.pageCount;
  354. /** @type {?} */
  355. var leftOffset = Math.floor(this.maxSize / 2);
  356. /** @type {?} */
  357. var rightOffset = this.maxSize % 2 === 0 ? leftOffset - 1 : leftOffset;
  358. if (this.page <= leftOffset) {
  359. // very beginning, no rotation -> [0..maxSize]
  360. end = this.maxSize;
  361. }
  362. else if (this.pageCount - this.page < leftOffset) {
  363. // very end, no rotation -> [len-maxSize..len]
  364. start = this.pageCount - this.maxSize;
  365. }
  366. else {
  367. // rotate
  368. start = this.page - leftOffset - 1;
  369. end = this.page + rightOffset;
  370. }
  371. return [start, end];
  372. };
  373. /**
  374. * Paginates page numbers based on maxSize items per page.
  375. */
  376. /**
  377. * Paginates page numbers based on maxSize items per page.
  378. * @private
  379. * @return {?}
  380. */
  381. NgbPagination.prototype._applyPagination = /**
  382. * Paginates page numbers based on maxSize items per page.
  383. * @private
  384. * @return {?}
  385. */
  386. function () {
  387. /** @type {?} */
  388. var page = Math.ceil(this.page / this.maxSize) - 1;
  389. /** @type {?} */
  390. var start = page * this.maxSize;
  391. /** @type {?} */
  392. var end = start + this.maxSize;
  393. return [start, end];
  394. };
  395. /**
  396. * @private
  397. * @param {?} newPageNo
  398. * @return {?}
  399. */
  400. NgbPagination.prototype._setPageInRange = /**
  401. * @private
  402. * @param {?} newPageNo
  403. * @return {?}
  404. */
  405. function (newPageNo) {
  406. /** @type {?} */
  407. var prevPageNo = this.page;
  408. this.page = getValueInRange(newPageNo, this.pageCount, 1);
  409. if (this.page !== prevPageNo && isNumber(this.collectionSize)) {
  410. this.pageChange.emit(this.page);
  411. }
  412. };
  413. /**
  414. * @private
  415. * @param {?} newPage
  416. * @return {?}
  417. */
  418. NgbPagination.prototype._updatePages = /**
  419. * @private
  420. * @param {?} newPage
  421. * @return {?}
  422. */
  423. function (newPage) {
  424. var _a, _b;
  425. this.pageCount = Math.ceil(this.collectionSize / this.pageSize);
  426. if (!isNumber(this.pageCount)) {
  427. this.pageCount = 0;
  428. }
  429. // fill-in model needed to render pages
  430. this.pages.length = 0;
  431. for (var i = 1; i <= this.pageCount; i++) {
  432. this.pages.push(i);
  433. }
  434. // set page within 1..max range
  435. this._setPageInRange(newPage);
  436. // apply maxSize if necessary
  437. if (this.maxSize > 0 && this.pageCount > this.maxSize) {
  438. /** @type {?} */
  439. var start = 0;
  440. /** @type {?} */
  441. var end = this.pageCount;
  442. // either paginating or rotating page numbers
  443. if (this.rotate) {
  444. _a = tslib_1.__read(this._applyRotation(), 2), start = _a[0], end = _a[1];
  445. }
  446. else {
  447. _b = tslib_1.__read(this._applyPagination(), 2), start = _b[0], end = _b[1];
  448. }
  449. this.pages = this.pages.slice(start, end);
  450. // adding ellipses
  451. this._applyEllipses(start, end);
  452. }
  453. };
  454. NgbPagination.decorators = [
  455. { type: Component, args: [{
  456. selector: 'ngb-pagination',
  457. changeDetection: ChangeDetectionStrategy.OnPush,
  458. host: { 'role': 'navigation' },
  459. 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 <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 <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()\" [attr.tabindex]=\"disabled ? '-1' : null\"\n [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 <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 "
  460. }] }
  461. ];
  462. /** @nocollapse */
  463. NgbPagination.ctorParameters = function () { return [
  464. { type: NgbPaginationConfig }
  465. ]; };
  466. NgbPagination.propDecorators = {
  467. tplEllipsis: [{ type: ContentChild, args: [NgbPaginationEllipsis, { static: false },] }],
  468. tplFirst: [{ type: ContentChild, args: [NgbPaginationFirst, { static: false },] }],
  469. tplLast: [{ type: ContentChild, args: [NgbPaginationLast, { static: false },] }],
  470. tplNext: [{ type: ContentChild, args: [NgbPaginationNext, { static: false },] }],
  471. tplNumber: [{ type: ContentChild, args: [NgbPaginationNumber, { static: false },] }],
  472. tplPrevious: [{ type: ContentChild, args: [NgbPaginationPrevious, { static: false },] }],
  473. disabled: [{ type: Input }],
  474. boundaryLinks: [{ type: Input }],
  475. directionLinks: [{ type: Input }],
  476. ellipses: [{ type: Input }],
  477. rotate: [{ type: Input }],
  478. collectionSize: [{ type: Input }],
  479. maxSize: [{ type: Input }],
  480. page: [{ type: Input }],
  481. pageSize: [{ type: Input }],
  482. pageChange: [{ type: Output }],
  483. size: [{ type: Input }]
  484. };
  485. return NgbPagination;
  486. }());
  487. export { NgbPagination };
  488. if (false) {
  489. /** @type {?} */
  490. NgbPagination.prototype.pageCount;
  491. /** @type {?} */
  492. NgbPagination.prototype.pages;
  493. /** @type {?} */
  494. NgbPagination.prototype.tplEllipsis;
  495. /** @type {?} */
  496. NgbPagination.prototype.tplFirst;
  497. /** @type {?} */
  498. NgbPagination.prototype.tplLast;
  499. /** @type {?} */
  500. NgbPagination.prototype.tplNext;
  501. /** @type {?} */
  502. NgbPagination.prototype.tplNumber;
  503. /** @type {?} */
  504. NgbPagination.prototype.tplPrevious;
  505. /**
  506. * If `true`, pagination links will be disabled.
  507. * @type {?}
  508. */
  509. NgbPagination.prototype.disabled;
  510. /**
  511. * If `true`, the "First" and "Last" page links are shown.
  512. * @type {?}
  513. */
  514. NgbPagination.prototype.boundaryLinks;
  515. /**
  516. * If `true`, the "Next" and "Previous" page links are shown.
  517. * @type {?}
  518. */
  519. NgbPagination.prototype.directionLinks;
  520. /**
  521. * If `true`, the ellipsis symbols and first/last page numbers will be shown when `maxSize` > number of pages.
  522. * @type {?}
  523. */
  524. NgbPagination.prototype.ellipses;
  525. /**
  526. * Whether to rotate pages when `maxSize` > number of pages.
  527. *
  528. * The current page always stays in the middle if `true`.
  529. * @type {?}
  530. */
  531. NgbPagination.prototype.rotate;
  532. /**
  533. * The number of items in your paginated collection.
  534. *
  535. * Note, that this is not the number of pages. Page numbers are calculated dynamically based on
  536. * `collectionSize` and `pageSize`. Ex. if you have 100 items in your collection and displaying 20 items per page,
  537. * you'll end up with 5 pages.
  538. * @type {?}
  539. */
  540. NgbPagination.prototype.collectionSize;
  541. /**
  542. * The maximum number of pages to display.
  543. * @type {?}
  544. */
  545. NgbPagination.prototype.maxSize;
  546. /**
  547. * The current page.
  548. *
  549. * Page numbers start with `1`.
  550. * @type {?}
  551. */
  552. NgbPagination.prototype.page;
  553. /**
  554. * The number of items per page.
  555. * @type {?}
  556. */
  557. NgbPagination.prototype.pageSize;
  558. /**
  559. * An event fired when the page is changed. Will fire only if collection size is set and all values are valid.
  560. *
  561. * Event payload is the number of the newly selected page.
  562. *
  563. * Page numbers start with `1`.
  564. * @type {?}
  565. */
  566. NgbPagination.prototype.pageChange;
  567. /**
  568. * The pagination display size.
  569. *
  570. * Bootstrap currently supports small and large sizes.
  571. * @type {?}
  572. */
  573. NgbPagination.prototype.size;
  574. }
  575. //# 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{\n  Component,\n  ContentChild,\n  Directive,\n  EventEmitter,\n  Input,\n  Output,\n  OnChanges,\n  ChangeDetectionStrategy,\n  SimpleChanges,\n  TemplateRef\n} from '@angular/core';\nimport {getValueInRange, isNumber} from '../util/util';\nimport {NgbPaginationConfig} from './pagination-config';\n\n/**\n * A context for the\n * * `NgbPaginationFirst`\n * * `NgbPaginationPrevious`\n * * `NgbPaginationNext`\n * * `NgbPaginationLast`\n * * `NgbPaginationEllipsis`\n *\n * link templates in case you want to override one.\n *\n * @since 4.1.0\n */\nexport interface NgbPaginationLinkContext {\n  /**\n   * The currently selected page number\n   */\n  currentPage: number;\n\n  /**\n   * If `true`, the current link is disabled\n   */\n  disabled: boolean;\n}\n\n/**\n * A context for the `NgbPaginationNumber` link template in case you want to override one.\n *\n * Extends `NgbPaginationLinkContext`.\n *\n * @since 4.1.0\n */\nexport interface NgbPaginationNumberContext extends NgbPaginationLinkContext {\n  /**\n   * The page number, displayed by the current page link.\n   */\n  $implicit: 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 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    <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      <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()\" [attr.tabindex]=\"disabled ? '-1' : null\"\n          [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      <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\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"]}