tornado-cli/local_modules/web3-providers-http/local_modules/xhr2-cookies/xml-http-request-event-target.ts

50 lines
1.8 KiB
TypeScript

import { ProgressEvent } from './progress-event';
export type ProgressEventListener = (event: ProgressEvent) => void;
export type ProgressEventListenerObject = {handleEvent(event: ProgressEvent): void};
export type ProgressEventListenerOrEventListenerObject = ProgressEventListener | ProgressEventListenerObject;
export class XMLHttpRequestEventTarget {
onloadstart: ProgressEventListener | null;
onprogress: ProgressEventListener | null;
onabort: ProgressEventListener | null;
onerror: ProgressEventListener | null;
onload: ProgressEventListener | null;
ontimeout: ProgressEventListener | null;
onloadend: ProgressEventListener | null;
private listeners: {[eventType: string]: ProgressEventListener[]} = {};
addEventListener(eventType: string, listener?: ProgressEventListenerOrEventListenerObject) {
eventType = eventType.toLowerCase();
this.listeners[eventType] = this.listeners[eventType] || [];
this.listeners[eventType].push((listener as ProgressEventListenerObject).handleEvent || (listener as ProgressEventListener));
}
removeEventListener(eventType: string, listener?: ProgressEventListenerOrEventListenerObject) {
eventType = eventType.toLowerCase();
if (!this.listeners[eventType]) { return; }
const index = this.listeners[eventType].indexOf((listener as ProgressEventListenerObject).handleEvent || (listener as ProgressEventListener));
if (index < 0) { return; }
this.listeners[eventType].splice(index, 1);
}
dispatchEvent(event: ProgressEvent) {
const eventType = event.type.toLowerCase();
event.target = this; // TODO: set event.currentTarget?
if (this.listeners[eventType]) {
for (let listener of this.listeners[eventType]) {
listener.call(this, event);
}
}
const listener = this[`on${eventType}`];
if (listener) {
listener.call(this, event);
}
return true;
}
}