82 lines
2.3 KiB
TypeScript
82 lines
2.3 KiB
TypeScript
import {Component, ElementRef, EventEmitter, HostListener, OnDestroy, OnInit, Output, ViewChild} from "@angular/core";
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import {Subscription} from "rxjs";
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declare var UIkit;
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@Component({
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selector: '[page-content]',
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template: `
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<div id="page_content">
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<div id="header">
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<div #header id="page_content_header" uk-sticky="top: #header; media: @m" [attr.offset]="offset">
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<div class="uk-container uk-container-large uk-padding-remove-vertical">
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<ng-content select="[header]"></ng-content>
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</div>
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</div>
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</div>
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<div id="page_content_inner" class="uk-section uk-container uk-container-large">
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<ng-content select="[inner]"></ng-content>
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</div>
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</div>
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`,
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})
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export class PageContentComponent implements OnInit, OnDestroy {
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public offset: number;
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public sticky: boolean = false;
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@Output()
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public stickyEmitter: EventEmitter<boolean> = new EventEmitter<boolean>();
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@ViewChild("header") public header: ElementRef;
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private current;
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private subscriptions: any[] = [];
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constructor() {
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}
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@HostListener('window:scroll', ['$event.target']) // for window scroll events
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scroll(e) {
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let scroll = window.pageYOffset;
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let previous = this.offset;
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if (scroll > this.current) {
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this.offset = 0;
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} else {
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this.offset = Number.parseInt(getComputedStyle(document.documentElement).getPropertyValue('--structure-header-height'));
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}
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if (this.offset !== previous) {
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this.initSticky();
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}
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this.current = scroll;
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}
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ngOnInit() {
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if (typeof window !== "undefined") {
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this.current = window.pageYOffset;
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}
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}
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initSticky() {
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this.clear();
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this.subscriptions.push(UIkit.util.on(document, 'active', '#page_content_header', (): void => {
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this.sticky = true;
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this.stickyEmitter.emit(this.sticky);
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}));
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this.subscriptions.push(UIkit.util.on(document, 'inactive', '#page_content_header', (): void => {
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this.sticky = false;
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this.stickyEmitter.emit(this.sticky);
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}));
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}
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clear() {
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this.subscriptions.forEach(subscription => {
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if (subscription instanceof Subscription) {
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subscription.unsubscribe();
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} else if (subscription instanceof Function) {
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subscription();
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}
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});
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}
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ngOnDestroy() {
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this.clear();
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}
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}
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