ng-terminal
Version:
NgTerminal is a terminal component on Angular 17 or higher.
90 lines • 10.8 kB
JavaScript
import { Injectable } from '@angular/core';
import { Subject } from 'rxjs';
import * as i0 from "@angular/core";
/**
*
* In the past, indivisual property changes caused very unexpected behavior on NgTerminal.
* To solve issues related to property changes, Queue is applied.
*/
export class LinearRenderService {
constructor(hostRef) {
this.hostRef = hostRef;
this.handlerToCheckElementConnection = undefined;
/**
* This queue has items to have a influence on the view and items are handled in order.
*/
this.propertyChangeQueue = [];
this.itemsToBeHandled = new Subject();
/**
* Handle a next set of changes if it exists.
*/
this.handleImmediate = () => {
if (!this.handlerToCheckElementConnection) {
let list = this.propertyChangeQueue.splice(0, 1);
if (list.length == 1) {
this.itemsToBeHandled.next(list[0]);
}
}
};
}
get renderObservable() {
return this.itemsToBeHandled;
}
/**
* {@link handleNextOne()} calls {@link handleImmediate()} if an element is connected.
* Otherwise, {@link pollAndHandle()} is called.
*/
handleNextOne(lazy = false) {
if (!this.hostRef.nativeElement.isConnected || lazy) {
this.pollAndHandle(!this.hostRef.nativeElement.isConnected
? 'NOT_CONNECTED_ELEMENT'
: 'LAZY');
}
else {
this.handleImmediate();
}
}
/**
* This method pushes item into {@link propertyChangeQueue}.
* @param item
*/
pushAndHandle(item, lazy = false) {
let changeWithDefault = {
...item,
};
this.propertyChangeQueue.push(changeWithDefault);
this.handleNextOne(lazy);
}
/**
* {@link pollAndHandle()} continues checking whether new item is put on a queue to call {@link handleImmediate()}.
*/
pollAndHandle(mode) {
const pollFunction = () => {
if (this.handlerToCheckElementConnection)
return;
const interval = setInterval(() => {
if (this.hostRef.nativeElement.isConnected) {
clearInterval(interval);
this.handlerToCheckElementConnection = undefined;
this.handleImmediate();
}
}, mode === 'NOT_CONNECTED_ELEMENT' ? 500 : 30);
this.handlerToCheckElementConnection = interval;
};
// Start polling
pollFunction();
}
ngOnDestroy() {
if (this.handlerToCheckElementConnection)
clearInterval(this.handlerToCheckElementConnection);
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "17.3.12", ngImport: i0, type: LinearRenderService, deps: [{ token: i0.ElementRef }], target: i0.ɵɵFactoryTarget.Injectable }); }
static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "17.3.12", ngImport: i0, type: LinearRenderService, providedIn: 'root' }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "17.3.12", ngImport: i0, type: LinearRenderService, decorators: [{
type: Injectable,
args: [{
providedIn: 'root',
}]
}], ctorParameters: () => [{ type: i0.ElementRef }] });
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