primeng/fesm2015/primeng-virtualscroller.js

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import { EventEmitter, ElementRef, Input, ContentChild, ContentChildren, ViewChild, Output, Component, ChangeDetectionStrategy, NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { Header, Footer, PrimeTemplate, SharedModule } from 'primeng/api';
import { ScrollingModule } from '@angular/cdk/scrolling';

var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
    if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
    return c > 3 && r && Object.defineProperty(target, key, r), r;
};
let VirtualScroller = class VirtualScroller {
    constructor(el) {
        this.el = el;
        this.cache = true;
        this.first = 0;
        this.trackBy = (index, item) => item;
        this.onLazyLoad = new EventEmitter();
        this._totalRecords = 0;
        this.lazyValue = [];
        this.page = 0;
    }
    get totalRecords() {
        return this._totalRecords;
    }
    set totalRecords(val) {
        this._totalRecords = val;
        this.lazyValue = Array.from({ length: this._totalRecords });
        this.onLazyLoad.emit(this.createLazyLoadMetadata());
        this.first = 0;
        this.scrollTo(0);
    }
    get value() {
        return this.lazy ? this.lazyValue : this._value;
    }
    set value(val) {
        if (this.lazy) {
            if (val) {
                let arr = this.cache ? [...this.lazyValue] : Array.from({ length: this._totalRecords });
                for (let i = this.first, j = 0; i < (this.first + this.rows); i++, j++) {
                    arr[i] = val[j];
                }
                this.lazyValue = arr;
            }
        }
        else {
            this._value = val;
        }
    }
    ngAfterContentInit() {
        this.templates.forEach((item) => {
            switch (item.getType()) {
                case 'item':
                    this.itemTemplate = item.template;
                    break;
                case 'loadingItem':
                    this.loadingItemTemplate = item.template;
                    break;
                default:
                    this.itemTemplate = item.template;
                    break;
            }
        });
    }
    onScrollIndexChange(index) {
        let p = Math.floor(index / this.rows);
        if (p !== this.page) {
            this.page = p;
            this.first = this.page * this.rows;
            this.onLazyLoad.emit(this.createLazyLoadMetadata());
        }
    }
    createLazyLoadMetadata() {
        return {
            first: this.first,
            rows: this.rows
        };
    }
    getBlockableElement() {
        return this.el.nativeElement.children[0];
    }
    scrollTo(index) {
        if (this.viewPortViewChild && this.viewPortViewChild['elementRef'] && this.viewPortViewChild['elementRef'].nativeElement) {
            this.viewPortViewChild['elementRef'].nativeElement.scrollTop = index * this.itemSize;
        }
    }
};
VirtualScroller.ctorParameters = () => [
    { type: ElementRef }
];
__decorate([
    Input()
], VirtualScroller.prototype, "itemSize", void 0);
__decorate([
    Input()
], VirtualScroller.prototype, "style", void 0);
__decorate([
    Input()
], VirtualScroller.prototype, "styleClass", void 0);
__decorate([
    Input()
], VirtualScroller.prototype, "scrollHeight", void 0);
__decorate([
    Input()
], VirtualScroller.prototype, "lazy", void 0);
__decorate([
    Input()
], VirtualScroller.prototype, "cache", void 0);
__decorate([
    Input()
], VirtualScroller.prototype, "rows", void 0);
__decorate([
    Input()
], VirtualScroller.prototype, "first", void 0);
__decorate([
    Input()
], VirtualScroller.prototype, "trackBy", void 0);
__decorate([
    ContentChild(Header)
], VirtualScroller.prototype, "header", void 0);
__decorate([
    ContentChild(Footer)
], VirtualScroller.prototype, "footer", void 0);
__decorate([
    ContentChildren(PrimeTemplate)
], VirtualScroller.prototype, "templates", void 0);
__decorate([
    ViewChild('viewport')
], VirtualScroller.prototype, "viewPortViewChild", void 0);
__decorate([
    Output()
], VirtualScroller.prototype, "onLazyLoad", void 0);
__decorate([
    Input()
], VirtualScroller.prototype, "totalRecords", null);
__decorate([
    Input()
], VirtualScroller.prototype, "value", null);
VirtualScroller = __decorate([
    Component({
        selector: 'p-virtualScroller',
        template: `
        <div [ngClass]="'ui-virtualscroller ui-widget'" [ngStyle]="style" [class]="styleClass">
            <div class="ui-virtualscroller-header ui-widget-header ui-corner-top" *ngIf="header">
                <ng-content select="p-header"></ng-content>
            </div>
            <div #content class="ui-virtualscroller-content ui-widget-content">
                <ul class="ui-virtualscroller-list">
                    <cdk-virtual-scroll-viewport #viewport [ngStyle]="{'height': scrollHeight}" [itemSize]="itemSize" (scrolledIndexChange)="onScrollIndexChange($event)">
                        <ng-container *cdkVirtualFor="let item of value; trackBy: trackBy; let i = index; let c = count; let f = first; let l = last; let e = even; let o = odd; ">
                            <li [ngStyle]="{'height': itemSize + 'px'}">
                                <ng-container *ngTemplateOutlet="item ? itemTemplate : loadingItemTemplate; context: {$implicit: item, index: i, count: c, first: f, last: l, even: e, odd: o}"></ng-container>
                            </li>
                        </ng-container>
                    </cdk-virtual-scroll-viewport>
                </ul>
            </div>
            <div class="ui-virtualscroller-footer ui-widget-header ui-corner-bottom" *ngIf="footer">
                <ng-content select="p-footer"></ng-content>
            </div>
        </div>
    `,
        changeDetection: ChangeDetectionStrategy.Default
    })
], VirtualScroller);
let VirtualScrollerModule = class VirtualScrollerModule {
};
VirtualScrollerModule = __decorate([
    NgModule({
        imports: [CommonModule, ScrollingModule],
        exports: [VirtualScroller, SharedModule, ScrollingModule],
        declarations: [VirtualScroller]
    })
], VirtualScrollerModule);

/**
 * Generated bundle index. Do not edit.
 */

export { VirtualScroller, VirtualScrollerModule };
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