primeng/bundles/primeng-defer.umd.js

(function (global, factory) {
    typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@angular/core'), require('@angular/common')) :
    typeof define === 'function' && define.amd ? define('primeng/defer', ['exports', '@angular/core', '@angular/common'], factory) :
    (global = global || self, factory((global.primeng = global.primeng || {}, global.primeng.defer = {}), global.ng.core, global.ng.common));
}(this, (function (exports, core, common) { '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 DeferredLoader = /** @class */ (function () {
        function DeferredLoader(el, renderer, viewContainer) {
            this.el = el;
            this.renderer = renderer;
            this.viewContainer = viewContainer;
            this.onLoad = new core.EventEmitter();
        }
        DeferredLoader.prototype.ngAfterViewInit = function () {
            var _this = this;
            if (this.shouldLoad()) {
                this.load();
            }
            if (!this.isLoaded()) {
                this.documentScrollListener = this.renderer.listen('window', 'scroll', function () {
                    if (_this.shouldLoad()) {
                        _this.load();
                        _this.documentScrollListener();
                        _this.documentScrollListener = null;
                    }
                });
            }
        };
        DeferredLoader.prototype.shouldLoad = function () {
            if (this.isLoaded()) {
                return false;
            }
            else {
                var rect = this.el.nativeElement.getBoundingClientRect();
                var docElement = document.documentElement;
                var winHeight = docElement.clientHeight;
                return (winHeight >= rect.top);
            }
        };
        DeferredLoader.prototype.load = function () {
            this.view = this.viewContainer.createEmbeddedView(this.template);
            this.onLoad.emit();
        };
        DeferredLoader.prototype.isLoaded = function () {
            return this.view != null;
        };
        DeferredLoader.prototype.ngOnDestroy = function () {
            this.view = null;
            if (this.documentScrollListener) {
                this.documentScrollListener();
            }
        };
        DeferredLoader.ctorParameters = function () { return [
            { type: core.ElementRef },
            { type: core.Renderer2 },
            { type: core.ViewContainerRef }
        ]; };
        __decorate([
            core.Output()
        ], DeferredLoader.prototype, "onLoad", void 0);
        __decorate([
            core.ContentChild(core.TemplateRef)
        ], DeferredLoader.prototype, "template", void 0);
        DeferredLoader = __decorate([
            core.Directive({
                selector: '[pDefer]'
            })
        ], DeferredLoader);
        return DeferredLoader;
    }());
    var DeferModule = /** @class */ (function () {
        function DeferModule() {
        }
        DeferModule = __decorate([
            core.NgModule({
                imports: [common.CommonModule],
                exports: [DeferredLoader],
                declarations: [DeferredLoader]
            })
        ], DeferModule);
        return DeferModule;
    }());

    exports.DeferModule = DeferModule;
    exports.DeferredLoader = DeferredLoader;

    Object.defineProperty(exports, '__esModule', { value: true });

})));
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