62 lines
1.7 KiB
TypeScript
62 lines
1.7 KiB
TypeScript
// https://github.com/arthurvaverko/ngx-fill-height/tree/master/src/app/fill-height
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import { Directive, AfterViewInit, Input, HostListener, ElementRef, ChangeDetectorRef, OnInit, OnDestroy } from '@angular/core';
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@Directive({
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selector: '[of-auto-height]'
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})
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export class AutoHeightDirective implements OnInit, OnDestroy, AfterViewInit {
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@Input() footerElement = null;
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@HostListener('window:resize', ['$event'])
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onResize(event) {
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this.calculateAndSetElementHeight();
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}
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constructor(
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private elementRef: ElementRef,
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private changeDetector: ChangeDetectorRef,
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) {
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}
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ngOnInit(): void {
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}
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ngAfterViewInit(): void {
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this.calculateAndSetElementHeight();
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}
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ngOnDestroy(): void {
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}
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/**
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* forceCalculate
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*/
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public forceCalculate() {
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this.calculateAndSetElementHeight();
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}
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private calculateAndSetElementHeight() {
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this.changeDetector.detectChanges();
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this.elementRef.nativeElement.style.overflow = 'auto';
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const windowHeight = window.innerHeight;
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const elementOffsetTop = this.getElementOffsetTop();
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const elementMarginBottom = this.elementRef.nativeElement.style.marginBottom;
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const footerElementMargin = this.getfooterElementMargin();
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this.elementRef.nativeElement.style.height = windowHeight - footerElementMargin - elementOffsetTop + 'px';
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console.log([windowHeight, elementOffsetTop, elementMarginBottom, footerElementMargin, this.elementRef.nativeElement.style.height]);
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}
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private getElementOffsetTop() {
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return this.elementRef.nativeElement.getBoundingClientRect().top;
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}
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private getfooterElementMargin() {
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if (!this.footerElement) { return 0; }
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const footerStyle = window.getComputedStyle(this.footerElement);
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return parseInt(footerStyle.height, 10);
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}
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}
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