primeng
Version:
[](https://opensource.org/licenses/MIT) [](https://badge.fury.io/js/primeng) [ • 9.75 kB
JavaScript
(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@angular/core'), require('@angular/common'), require('primeng/api'), require('@angular/cdk/scrolling')) :
typeof define === 'function' && define.amd ? define('primeng/virtualscroller', ['exports', '@angular/core', '@angular/common', 'primeng/api', '@angular/cdk/scrolling'], factory) :
(global = global || self, factory((global.primeng = global.primeng || {}, global.primeng.virtualscroller = {}), global.ng.core, global.ng.common, global.primeng.api, global.ng.cdk.scrolling));
}(this, (function (exports, core, common, api, scrolling) { 'use strict';
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;
};
var __read = (this && this.__read) || function (o, n) {
var m = typeof Symbol === "function" && o[Symbol.iterator];
if (!m) return o;
var i = m.call(o), r, ar = [], e;
try {
while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);
}
catch (error) { e = { error: error }; }
finally {
try {
if (r && !r.done && (m = i["return"])) m.call(i);
}
finally { if (e) throw e.error; }
}
return ar;
};
var __spread = (this && this.__spread) || function () {
for (var ar = [], i = 0; i < arguments.length; i++) ar = ar.concat(__read(arguments[i]));
return ar;
};
var VirtualScroller = /** @class */ (function () {
function VirtualScroller(el) {
this.el = el;
this.cache = true;
this.first = 0;
this.trackBy = function (index, item) { return item; };
this.onLazyLoad = new core.EventEmitter();
this._totalRecords = 0;
this.lazyValue = [];
this.page = 0;
}
Object.defineProperty(VirtualScroller.prototype, "totalRecords", {
get: function () {
return this._totalRecords;
},
set: function (val) {
this._totalRecords = val;
this.lazyValue = Array.from({ length: this._totalRecords });
this.onLazyLoad.emit(this.createLazyLoadMetadata());
this.first = 0;
this.scrollTo(0);
},
enumerable: true,
configurable: true
});
Object.defineProperty(VirtualScroller.prototype, "value", {
get: function () {
return this.lazy ? this.lazyValue : this._value;
},
set: function (val) {
if (this.lazy) {
if (val) {
var arr = this.cache ? __spread(this.lazyValue) : Array.from({ length: this._totalRecords });
for (var i = this.first, j = 0; i < (this.first + this.rows); i++, j++) {
arr[i] = val[j];
}
this.lazyValue = arr;
}
}
else {
this._value = val;
}
},
enumerable: true,
configurable: true
});
VirtualScroller.prototype.ngAfterContentInit = function () {
var _this = this;
this.templates.forEach(function (item) {
switch (item.getType()) {
case 'item':
_this.itemTemplate = item.template;
break;
case 'loadingItem':
_this.loadingItemTemplate = item.template;
break;
default:
_this.itemTemplate = item.template;
break;
}
});
};
VirtualScroller.prototype.onScrollIndexChange = function (index) {
var p = Math.floor(index / this.rows);
if (p !== this.page) {
this.page = p;
this.first = this.page * this.rows;
this.onLazyLoad.emit(this.createLazyLoadMetadata());
}
};
VirtualScroller.prototype.createLazyLoadMetadata = function () {
return {
first: this.first,
rows: this.rows
};
};
VirtualScroller.prototype.getBlockableElement = function () {
return this.el.nativeElement.children[0];
};
VirtualScroller.prototype.scrollTo = function (index) {
if (this.viewPortViewChild && this.viewPortViewChild['elementRef'] && this.viewPortViewChild['elementRef'].nativeElement) {
this.viewPortViewChild['elementRef'].nativeElement.scrollTop = index * this.itemSize;
}
};
VirtualScroller.ctorParameters = function () { return [
{ type: core.ElementRef }
]; };
__decorate([
core.Input()
], VirtualScroller.prototype, "itemSize", void 0);
__decorate([
core.Input()
], VirtualScroller.prototype, "style", void 0);
__decorate([
core.Input()
], VirtualScroller.prototype, "styleClass", void 0);
__decorate([
core.Input()
], VirtualScroller.prototype, "scrollHeight", void 0);
__decorate([
core.Input()
], VirtualScroller.prototype, "lazy", void 0);
__decorate([
core.Input()
], VirtualScroller.prototype, "cache", void 0);
__decorate([
core.Input()
], VirtualScroller.prototype, "rows", void 0);
__decorate([
core.Input()
], VirtualScroller.prototype, "first", void 0);
__decorate([
core.Input()
], VirtualScroller.prototype, "trackBy", void 0);
__decorate([
core.ContentChild(api.Header)
], VirtualScroller.prototype, "header", void 0);
__decorate([
core.ContentChild(api.Footer)
], VirtualScroller.prototype, "footer", void 0);
__decorate([
core.ContentChildren(api.PrimeTemplate)
], VirtualScroller.prototype, "templates", void 0);
__decorate([
core.ViewChild('viewport')
], VirtualScroller.prototype, "viewPortViewChild", void 0);
__decorate([
core.Output()
], VirtualScroller.prototype, "onLazyLoad", void 0);
__decorate([
core.Input()
], VirtualScroller.prototype, "totalRecords", null);
__decorate([
core.Input()
], VirtualScroller.prototype, "value", null);
VirtualScroller = __decorate([
core.Component({
selector: 'p-virtualScroller',
template: "\n <div [ngClass]=\"'ui-virtualscroller ui-widget'\" [ngStyle]=\"style\" [class]=\"styleClass\">\n <div class=\"ui-virtualscroller-header ui-widget-header ui-corner-top\" *ngIf=\"header\">\n <ng-content select=\"p-header\"></ng-content>\n </div>\n <div #content class=\"ui-virtualscroller-content ui-widget-content\">\n <ul class=\"ui-virtualscroller-list\">\n <cdk-virtual-scroll-viewport #viewport [ngStyle]=\"{'height': scrollHeight}\" [itemSize]=\"itemSize\" (scrolledIndexChange)=\"onScrollIndexChange($event)\">\n <ng-container *cdkVirtualFor=\"let item of value; trackBy: trackBy; let i = index; let c = count; let f = first; let l = last; let e = even; let o = odd; \">\n <li [ngStyle]=\"{'height': itemSize + 'px'}\">\n <ng-container *ngTemplateOutlet=\"item ? itemTemplate : loadingItemTemplate; context: {$implicit: item, index: i, count: c, first: f, last: l, even: e, odd: o}\"></ng-container>\n </li>\n </ng-container>\n </cdk-virtual-scroll-viewport>\n </ul>\n </div>\n <div class=\"ui-virtualscroller-footer ui-widget-header ui-corner-bottom\" *ngIf=\"footer\">\n <ng-content select=\"p-footer\"></ng-content>\n </div>\n </div>\n ",
changeDetection: core.ChangeDetectionStrategy.Default
})
], VirtualScroller);
return VirtualScroller;
}());
var VirtualScrollerModule = /** @class */ (function () {
function VirtualScrollerModule() {
}
VirtualScrollerModule = __decorate([
core.NgModule({
imports: [common.CommonModule, scrolling.ScrollingModule],
exports: [VirtualScroller, api.SharedModule, scrolling.ScrollingModule],
declarations: [VirtualScroller]
})
], VirtualScrollerModule);
return VirtualScrollerModule;
}());
exports.VirtualScroller = VirtualScroller;
exports.VirtualScrollerModule = VirtualScrollerModule;
Object.defineProperty(exports, '__esModule', { value: true });
})));
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