Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 | 1x 1x 1x 1x | import { LektorEvent } from "./events";
class Hub {
_subscriptions: Map<string, Set<(e: any) => void>>;
constructor() {
this._subscriptions = new Map();
}
/**
* Subscribes a callback to an event.
*/
subscribe<T extends LektorEvent>(
event: T,
callback: (e: InstanceType<T>) => void
) {
const eventType = event.getEventType();
let subs = this._subscriptions.get(eventType);
if (subs === undefined) {
subs = new Set();
this._subscriptions.set(eventType, subs);
}
subs.add(callback);
}
/**
* Unsubscribes a callback from an event.
*/
unsubscribe<T extends LektorEvent>(
event: T,
callback: (e: InstanceType<T>) => void
) {
const eventType = event.getEventType();
const subs = this._subscriptions.get(eventType);
if (subs !== undefined) {
subs.delete(callback);
}
}
/**
* Emits an event with some parameters.
*/
emit(event: InstanceType<LektorEvent>) {
const subs = this._subscriptions.get(event.type);
if (subs !== undefined) {
subs.forEach((callback) => {
try {
callback(event);
} catch (e) {
console.log(
"Event callback failed: ",
e,
"callback=",
callback,
"event=",
event
);
}
});
}
}
}
const hub = new Hub();
export default hub;
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