| 1 | 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{ Component, ElementRef, OnInit, Renderer, Input, Output, EventEmitter, forwardRef } from '@angular/core';\nimport { ControlValueAccessor, NG_VALUE_ACCESSOR } from '@angular/forms';\nimport { PageChangedEvent } from './pagination.component';\nimport { PaginationConfig } from './pagination.config';\n\nexport const PAGER_CONTROL_VALUE_ACCESSOR: any = {\n provide: NG_VALUE_ACCESSOR,\n useExisting: forwardRef(() => PagerComponent),\n multi: true\n};\n\nconst PAGER_TEMPLATE = `\n <ul class=\"pager\">\n <li [class.disabled]=\"noPrevious()\" [class.previous]=\"align\" [ngClass]=\"{'pull-right': align}\" class=\"{{ pageBtnClass }}\">\n <a href (click)=\"selectPage(page - 1, $event)\">{{getText('previous')}}</a>\n </li>\n <li [class.disabled]=\"noNext()\" [class.next]=\"align\" [ngClass]=\"{'pull-right': align}\" class=\"{{ pageBtnClass }}\">\n <a href (click)=\"selectPage(page + 1, $event)\">{{getText('next')}}</a>\n </li>\n </ul>\n`;\n\n\nexport class PagerComponent implements ControlValueAccessor, OnInit {\n public config:any;\n /** if `true` aligns each link to the sides of pager */\n public align:boolean;\n /** limit number for page links in pager */\n public maxSize:number;\n /** if false first and last buttons will be hidden */\n public boundaryLinks:boolean;\n /** if false previous and next buttons will be hidden */\n public directionLinks:boolean;\n // labels\n /** first button text */\n public firstText:string;\n /** previous button text */\n public previousText:string;\n /** next button text */\n public nextText:string;\n /** last button text */\n public lastText:string;\n /** if true current page will in the middle of pages list */\n public rotate:boolean;\n // css\n /** add class to <li> */\n public pageBtnClass:string;\n\n /** if true pagination component will be disabled */\n public disabled:boolean;\n\n /** fired when total pages count changes, $event:number equals to total pages count */\n public numPages:EventEmitter<number> = new EventEmitter<number>();\n /** fired when page was changed, $event:{page, itemsPerPage} equals to object with current page index and number of items per page */\n public pageChanged:EventEmitter<PageChangedEvent> = new EventEmitter<PageChangedEvent>();\n\n /** maximum number of items per page. If value less than 1 will display all items on one page */\n \n public get itemsPerPage():number {\n return this._itemsPerPage;\n }\n\n public set itemsPerPage(v:number) {\n this._itemsPerPage = v;\n this.totalPages = this.calculateTotalPages();\n }\n\n /** total number of items in all pages */\n \n public get totalItems():number {\n return this._totalItems;\n }\n\n public set totalItems(v: number) {\n this._totalItems = v;\n this.totalPages = this.calculateTotalPages();\n }\n\n public get totalPages(): number {\n return this._totalPages;\n }\n\n public set totalPages(v: number) {\n this._totalPages = v;\n this.numPages.emit(v);\n if (this.inited) {\n this.selectPage(this.page);\n }\n }\n\n public set page(value: number) {\n const _previous = this._page;\n this._page = (value > this.totalPages) ? this.totalPages : (value || 1);\n\n if (_previous === this._page || typeof _previous === 'undefined') {\n return;\n }\n\n this.pageChanged.emit({\n page: this._page,\n itemsPerPage: this.itemsPerPage\n });\n }\n\n public get page(): number {\n return this._page;\n }\n\n public onChange: any = Function.prototype;\n public onTouched: any = Function.prototype;\n\n public renderer: Renderer;\n public elementRef: ElementRef;\n\n public classMap: string;\n public pages: any[];\n\n protected _itemsPerPage: number;\n protected _totalItems: number;\n protected _totalPages: number;\n protected inited: boolean = false;\n protected _page: number = 1;\n\n public constructor(renderer: Renderer, elementRef: ElementRef, paginationConfig: PaginationConfig) {\n this.renderer = renderer;\n this.elementRef = elementRef;\n if (!this.config) {\n this.configureOptions(Object.assign({}, paginationConfig.main, paginationConfig.pager));\n }\n }\n\n public configureOptions(config: any): void {\n this.config = Object.assign({}, config);\n }\n\n public ngOnInit(): void {\n this.classMap = this.elementRef.nativeElement.getAttribute('class') || '';\n // watch for maxSize\n this.maxSize = typeof this.maxSize !== 'undefined'\n ? this.maxSize\n : this.config.maxSize;\n this.rotate = typeof this.rotate !== 'undefined'\n ? this.rotate\n : this.config.rotate;\n this.boundaryLinks = typeof this.boundaryLinks !== 'undefined'\n ? this.boundaryLinks\n : this.config.boundaryLinks;\n this.directionLinks = typeof this.directionLinks !== 'undefined'\n ? this.directionLinks\n : this.config.directionLinks;\n this.pageBtnClass = typeof this.pageBtnClass !== 'undefined'\n ? this.pageBtnClass\n : this.config.pageBtnClass;\n\n // base class\n this.itemsPerPage = typeof this.itemsPerPage !== 'undefined'\n ? this.itemsPerPage\n : this.config.itemsPerPage;\n this.totalPages = this.calculateTotalPages();\n // this class\n this.pages = this.getPages(this.page, this.totalPages);\n this.inited = true;\n }\n\n public writeValue(value: number): void {\n this.page = value;\n this.pages = this.getPages(this.page, this.totalPages);\n }\n\n public getText(key: string): string {\n return (this as any)[key + 'Text'] || this.config[key + 'Text'];\n }\n\n public noPrevious(): boolean {\n return this.page === 1;\n }\n\n public noNext(): boolean {\n return this.page === this.totalPages;\n }\n\n public registerOnChange(fn: (_: any) => {}): void {\n this.onChange = fn;\n }\n\n public registerOnTouched(fn: () => {}): void {\n this.onTouched = fn;\n }\n\n public selectPage(page: number, event?: Event): void {\n if (event) {\n event.preventDefault();\n }\n\n if (!this.disabled) {\n if (event && event.target) {\n let target: any = event.target;\n target.blur();\n }\n this.writeValue(page);\n this.onChange(this.page);\n }\n }\n\n // Create page object used in template\n protected makePage(num: number, text: string, active: boolean): {number: number, text: string, active: boolean} {\n return {text, number: num, active};\n }\n\n protected getPages(currentPage: number, totalPages: number): any[] {\n let pages: any[] = [];\n\n // Default page limits\n let startPage = 1;\n let endPage = totalPages;\n let isMaxSized = typeof this.maxSize !== 'undefined' && this.maxSize < totalPages;\n\n // recompute if maxSize\n if (isMaxSized) {\n if (this.rotate) {\n // Current page is displayed in the middle of the visible ones\n startPage = Math.max(currentPage - Math.floor(this.maxSize / 2), 1);\n endPage = startPage + this.maxSize - 1;\n\n // Adjust if limit is exceeded\n if (endPage > totalPages) {\n endPage = totalPages;\n startPage = endPage - this.maxSize + 1;\n }\n } else {\n // Visible pages are paginated with maxSize\n startPage = ((Math.ceil(currentPage / this.maxSize) - 1) * this.maxSize) + 1;\n\n // Adjust last page if limit is exceeded\n endPage = Math.min(startPage + this.maxSize - 1, totalPages);\n }\n }\n\n // Add page number links\n for (let num = startPage; num <= endPage; num++) {\n let page = this.makePage(num, num.toString(), num === currentPage);\n pages.push(page);\n }\n\n // Add links to move between page sets\n if (isMaxSized && !this.rotate) {\n if (startPage > 1) {\n let previousPageSet = this.makePage(startPage - 1, '...', false);\n pages.unshift(previousPageSet);\n }\n\n if (endPage < totalPages) {\n let nextPageSet = this.makePage(endPage + 1, '...', false);\n pages.push(nextPageSet);\n }\n }\n\n return pages;\n }\n\n // base class\n protected calculateTotalPages(): number {\n let totalPages = this.itemsPerPage < 1\n ? 1\n : Math.ceil(this.totalItems / this.itemsPerPage);\n return Math.max(totalPages || 0, 1);\n }\nstatic decorators: DecoratorInvocation[] = [\n{ type: Component, args: [{\n selector: 'pager',\n template: PAGER_TEMPLATE,\n providers: [PAGER_CONTROL_VALUE_ACCESSOR]\n}, ] },\n];\n/** @nocollapse */\nstatic ctorParameters: () => ({type: any, decorators?: DecoratorInvocation[]}|null)[] = () => [\n{type: Renderer, },\n{type: ElementRef, },\n{type: PaginationConfig, },\n];\nstatic propDecorators: {[key: string]: DecoratorInvocation[]} = {\n'align': [{ type: Input },],\n'maxSize': [{ type: Input },],\n'boundaryLinks': [{ type: Input },],\n'directionLinks': [{ type: Input },],\n'firstText': [{ type: Input },],\n'previousText': [{ type: Input },],\n'nextText': [{ type: Input },],\n'lastText': [{ type: Input },],\n'rotate': [{ type: Input },],\n'pageBtnClass': [{ type: Input },],\n'disabled': [{ type: Input },],\n'numPages': [{ type: Output },],\n'pageChanged': [{ type: Output },],\n'itemsPerPage': [{ type: Input },],\n'totalItems': [{ type: Input },],\n};\n}\n\ninterface DecoratorInvocation {\n type: Function;\n args?: any[];\n}\n"]} |