fullscreen.directive.ts
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///
/// Copyright © 2016-2020 The Thingsboard Authors
///
/// Licensed under the Apache License, Version 2.0 (the "License");
/// you may not use this file except in compliance with the License.
/// You may obtain a copy of the License at
///
/// http://www.apache.org/licenses/LICENSE-2.0
///
/// Unless required by applicable law or agreed to in writing, software
/// distributed under the License is distributed on an "AS IS" BASIS,
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
/// See the License for the specific language governing permissions and
/// limitations under the License.
///
import {
Directive,
ElementRef,
EventEmitter,
Input, OnChanges, OnDestroy,
Output, SimpleChanges,
ViewContainerRef
} from '@angular/core';
import { Overlay, OverlayConfig, OverlayRef } from '@angular/cdk/overlay';
import { ComponentPortal } from '@angular/cdk/portal';
import { TbAnchorComponent } from '@shared/components/tb-anchor.component';
@Directive({
selector: '[tb-fullscreen]'
})
export class FullscreenDirective implements OnChanges, OnDestroy {
fullscreenValue = false;
private overlayRef: OverlayRef;
private parentElement: HTMLElement;
@Input()
fullscreen: boolean;
@Input()
fullscreenElement: HTMLElement;
@Output()
fullscreenChanged = new EventEmitter<boolean>();
constructor(public elementRef: ElementRef,
private viewContainerRef: ViewContainerRef,
private overlay: Overlay) {
}
ngOnChanges(changes: SimpleChanges): void {
let updateFullscreen = false;
for (const propName of Object.keys(changes)) {
const change = changes[propName];
if (!change.firstChange && change.currentValue !== change.previousValue) {
if (propName === 'fullscreen') {
updateFullscreen = true;
}
}
}
if (updateFullscreen) {
if (this.fullscreen) {
this.enterFullscreen();
} else {
this.exitFullscreen();
}
}
}
ngOnDestroy(): void {
if (this.fullscreen) {
this.exitFullscreen();
}
}
enterFullscreen() {
const targetElement: HTMLElement = this.fullscreenElement || this.elementRef.nativeElement;
this.parentElement = targetElement.parentElement;
this.parentElement.removeChild(targetElement);
targetElement.classList.add('tb-fullscreen');
const position = this.overlay.position();
const config = new OverlayConfig({
hasBackdrop: false,
panelClass: 'tb-fullscreen-parent'
});
config.minWidth = '100%';
config.minHeight = '100%';
config.positionStrategy = position.global().top('0%').left('0%')
.right('0%').bottom('0%');
this.overlayRef = this.overlay.create(config);
this.overlayRef.attach(new EmptyPortal());
this.overlayRef.overlayElement.appendChild( targetElement );
this.fullscreenChanged.emit(true);
}
exitFullscreen() {
const targetElement: HTMLElement = this.fullscreenElement || this.elementRef.nativeElement;
if (this.parentElement) {
this.overlayRef.overlayElement.removeChild( targetElement );
this.parentElement.appendChild(targetElement);
this.parentElement = null;
}
targetElement.classList.remove('tb-fullscreen');
if (this.elementRef) {
this.elementRef.nativeElement.classList.remove('tb-fullscreen');
}
if (this.overlayRef) {
this.overlayRef.dispose();
}
this.fullscreenChanged.emit(false);
}
}
class EmptyPortal extends ComponentPortal<TbAnchorComponent> {
constructor() {
super(TbAnchorComponent);
}
}