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/*-
* ============LICENSE_START=======================================================
* SDC
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
/**
* Created by rc2122 on 6/6/2017.
*/
import { Component, Input, ViewContainerRef, SimpleChanges} from "@angular/core";
@Component({
selector: 'loader',
templateUrl: './loader.component.html',
styleUrls: ['./loader.component.less']
})
export class LoaderComponent {
@Input() display: boolean;
@Input() size: string;// small || medium || large
@Input() relative: boolean; // If is relative is set to true, loader will appear over parent element. Otherwise, will be fixed over the entire page.
@Input() loaderDelay: number; //optional - number of ms to delay loader display.
private isVisible: boolean = false;
private offset : {
top: string;
left: string;
width: string;
height: string;
};
constructor(private viewContainerRef: ViewContainerRef) {
}
ngOnInit() {
if (!this.size) {
this.size = 'large';
}
if (this.display === true) {
this.changeLoaderDisplay(true);
}
}
ngOnChanges(changes: SimpleChanges) {
if(changes.display){
this.changeLoaderDisplay(this.display);
}
}
private changeLoaderDisplay = (display: boolean): void => {
if (display) {
window.setTimeout((): void => {
this.display && this.showLoader(); //only show loader if this.display has not changed in the meanwhile.
}, this.loaderDelay || 0);
} else {
this.isVisible = false;
}
}
private showLoader = () => {
if (this.relative === true) {
let parentElement = this.viewContainerRef.element.nativeElement.parentElement;
this.offset = {
left: (parentElement.offsetLeft) ? parentElement.offsetLeft + "px" : undefined,
top: (parentElement.offsetTop) ? parentElement.offsetTop + "px" : undefined,
width: (parentElement.offsetWidth) ? parentElement.offsetWidth + "px" : undefined,
height: (parentElement.offsetHeight) ? parentElement.offsetHeight + "px" : undefined
};
}
this.isVisible = true;
}
}
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