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90 lines
3.5 KiB
JavaScript
90 lines
3.5 KiB
JavaScript
"use strict";
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var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
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var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
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if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
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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;
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return c > 3 && r && Object.defineProperty(target, key, r), r;
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};
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var __metadata = (this && this.__metadata) || function (k, v) {
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if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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var core_1 = require("@angular/core");
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var common_1 = require("@angular/common");
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var DeferredLoader = /** @class */ (function () {
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function DeferredLoader(el, renderer, viewContainer) {
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this.el = el;
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this.renderer = renderer;
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this.viewContainer = viewContainer;
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this.onLoad = new core_1.EventEmitter();
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}
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DeferredLoader.prototype.ngAfterViewInit = function () {
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var _this = this;
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if (this.shouldLoad()) {
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this.load();
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}
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if (!this.isLoaded()) {
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this.documentScrollListener = this.renderer.listen('window', 'scroll', function () {
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if (_this.shouldLoad()) {
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_this.load();
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_this.documentScrollListener();
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_this.documentScrollListener = null;
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}
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});
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}
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};
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DeferredLoader.prototype.shouldLoad = function () {
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if (this.isLoaded()) {
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return false;
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}
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else {
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var rect = this.el.nativeElement.getBoundingClientRect();
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var docElement = document.documentElement;
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var winHeight = docElement.clientHeight;
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return (winHeight >= rect.top);
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}
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};
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DeferredLoader.prototype.load = function () {
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this.view = this.viewContainer.createEmbeddedView(this.template);
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this.onLoad.emit();
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};
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DeferredLoader.prototype.isLoaded = function () {
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return this.view != null;
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};
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DeferredLoader.prototype.ngOnDestroy = function () {
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this.view = null;
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if (this.documentScrollListener) {
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this.documentScrollListener();
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}
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};
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__decorate([
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core_1.Output(),
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__metadata("design:type", core_1.EventEmitter)
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], DeferredLoader.prototype, "onLoad", void 0);
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__decorate([
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core_1.ContentChild(core_1.TemplateRef),
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__metadata("design:type", core_1.TemplateRef)
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], DeferredLoader.prototype, "template", void 0);
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DeferredLoader = __decorate([
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core_1.Directive({
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selector: '[pDefer]'
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}),
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__metadata("design:paramtypes", [core_1.ElementRef, core_1.Renderer2, core_1.ViewContainerRef])
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], DeferredLoader);
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return DeferredLoader;
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}());
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exports.DeferredLoader = DeferredLoader;
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var DeferModule = /** @class */ (function () {
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function DeferModule() {
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}
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DeferModule = __decorate([
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core_1.NgModule({
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imports: [common_1.CommonModule],
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exports: [DeferredLoader],
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declarations: [DeferredLoader]
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})
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], DeferModule);
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return DeferModule;
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}());
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exports.DeferModule = DeferModule;
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//# sourceMappingURL=defer.js.map
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