{"version":3,"file":"primeng-virtualscroller.mjs","sources":["../../src/app/components/virtualscroller/virtualscroller.ts","../../src/app/components/virtualscroller/primeng-virtualscroller.ts"],"sourcesContent":["import { CommonModule } from '@angular/common';\nimport {\n    AfterContentInit,\n    ChangeDetectionStrategy,\n    ChangeDetectorRef,\n    Component,\n    ContentChild,\n    ContentChildren,\n    ElementRef,\n    EventEmitter,\n    Input,\n    NgModule,\n    Output,\n    QueryList,\n    TemplateRef,\n    ViewChild,\n    ViewEncapsulation,\n    booleanAttribute,\n    numberAttribute\n} from '@angular/core';\nimport { BlockableUI, Footer, Header, PrimeTemplate, ScrollerOptions, SharedModule } from 'primeng/api';\nimport { Scroller, ScrollerModule } from 'primeng/scroller';\nimport { Nullable } from 'primeng/ts-helpers';\nimport { VirtualScrollerLazyLoadEvent } from './virtualscroller.interface';\n/**\n * VirtualScroller is a performant approach to handle huge data efficiently.\n * @group Components\n */\n@Component({\n    selector: 'p-virtualScroller',\n    template: `\n        <div [ngClass]=\"'p-virtualscroller p-component'\" [ngStyle]=\"style\" [class]=\"styleClass\" [attr.data-pc-name]=\"'virtualscroller'\" [attr.data-pc-section]=\"'root'\">\n            <div class=\"p-virtualscroller-header\" *ngIf=\"header || headerTemplate\">\n                <ng-content select=\"p-header\"></ng-content>\n                <ng-container *ngTemplateOutlet=\"headerTemplate\"></ng-container>\n            </div>\n            <div #content class=\"p-virtualscroller-content\" [attr.data-pc-section]=\"'content'\">\n                <p-scroller #scroller [items]=\"value\" styleClass=\"p-virtualscroller-list\" [style]=\"{ height: scrollHeight }\" [itemSize]=\"itemSize\" [lazy]=\"lazy\" (onLazyLoad)=\"onLazyItemLoad($event)\" [options]=\"options\">\n                    <ng-template pTemplate=\"item\" let-item let-scrollerOptions=\"options\">\n                        <div [ngStyle]=\"{ height: itemSize + 'px' }\" class=\"p-virtualscroller-item\">\n                            <ng-container *ngTemplateOutlet=\"item ? itemTemplate : loadingItemTemplate; context: { $implicit: item, options: scrollerOptions }\"></ng-container>\n                        </div>\n                    </ng-template>\n                </p-scroller>\n            </div>\n            <div class=\"p-virtualscroller-footer\" *ngIf=\"footer || footerTemplate\" [attr.data-pc-section]=\"'footer'\">\n                <ng-content select=\"p-footer\"></ng-content>\n                <ng-container *ngTemplateOutlet=\"footerTemplate\"></ng-container>\n            </div>\n        </div>\n    `,\n    changeDetection: ChangeDetectionStrategy.Default,\n    encapsulation: ViewEncapsulation.None,\n    host: {\n        class: 'p-element'\n    }\n})\nexport class VirtualScroller implements AfterContentInit, BlockableUI {\n    /**\n     * An array of objects to display.\n     * @group Props\n     */\n    @Input() value: any[] | undefined;\n    /**\n     * Height of an item in the list.\n     * @group Props\n     */\n    @Input({ transform: numberAttribute }) itemSize: number | undefined;\n    /**\n     * Inline style of the component.\n     * @group Props\n     */\n    @Input() style: { [klass: string]: any } | null | undefined;\n    /**\n     * Style class of the component.\n     * @group Props\n     */\n    @Input() styleClass: string | undefined;\n    /**\n     * Max height of the content area in inline mode.\n     * @group Props\n     */\n    @Input() scrollHeight: any;\n    /**\n     * Defines if data is loaded and interacted with in lazy manner.\n     * @group Props\n     */\n    @Input({ transform: booleanAttribute }) lazy: boolean | undefined;\n    /**\n     * Whether to use the scroller feature. The properties of scroller component can be used like an object in it.\n     * @group Props\n     */\n    @Input() options: ScrollerOptions | undefined;\n    /**\n     * Threshold in milliseconds to delay lazy loading during scrolling.\n     * @group Props\n     */\n    @Input({ transform: numberAttribute }) delay: number = 250;\n    /**\n     * Callback to invoke in lazy mode to load new data.\n     * @param {VirtualScrollerLazyLoadEvent} event - custom lazy load event.\n     * @group Emits\n     */\n    @Output() onLazyLoad: EventEmitter<VirtualScrollerLazyLoadEvent> = new EventEmitter<VirtualScrollerLazyLoadEvent>();\n\n    @ContentChild(Header) header: Header | undefined;\n\n    @ContentChild(Footer) footer: Footer | undefined;\n\n    @ContentChildren(PrimeTemplate) templates: Nullable<QueryList<PrimeTemplate>>;\n\n    @ViewChild('scroller') scroller: Nullable<Scroller>;\n\n    itemTemplate: Nullable<TemplateRef<any>>;\n\n    headerTemplate: Nullable<TemplateRef<any>>;\n\n    footerTemplate: Nullable<TemplateRef<any>>;\n\n    loadingItemTemplate: Nullable<TemplateRef<any>>;\n\n    virtualScrollTimeout: any;\n\n    constructor(public el: ElementRef, public cd: ChangeDetectorRef) {}\n\n    ngAfterContentInit() {\n        (this.templates as QueryList<PrimeTemplate>).forEach((item) => {\n            switch (item.getType()) {\n                case 'item':\n                    this.itemTemplate = item.template;\n                    break;\n\n                case 'loadingItem':\n                    this.loadingItemTemplate = item.template;\n                    break;\n\n                case 'header':\n                    this.headerTemplate = item.template;\n                    break;\n\n                case 'footer':\n                    this.footerTemplate = item.template;\n                    break;\n\n                default:\n                    this.itemTemplate = item.template;\n                    break;\n            }\n        });\n    }\n\n    onLazyItemLoad(event: VirtualScrollerLazyLoadEvent) {\n        if (this.virtualScrollTimeout) {\n            clearTimeout(this.virtualScrollTimeout);\n        }\n\n        this.virtualScrollTimeout = setTimeout(() => {\n            this.onLazyLoad.emit({\n                ...event,\n                rows: <number>event.last - <number>event.first,\n                forceUpdate: () => this.cd.detectChanges()\n            });\n        }, this.delay);\n    }\n\n    getBlockableElement(): HTMLElement {\n        return this.el.nativeElement.children[0];\n    }\n\n    scrollToIndex(index: number, mode?: ScrollBehavior): void {\n        this.scroller?.scrollToIndex(index, mode);\n    }\n}\n\n@NgModule({\n    imports: [CommonModule, SharedModule, ScrollerModule],\n    exports: [VirtualScroller, SharedModule, ScrollerModule],\n    declarations: [VirtualScroller]\n})\nexport class VirtualScrollerModule {}\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from 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