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ipc-main-impl.ts
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ipc-main-impl.ts
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import { EventEmitter } from 'events';
import { IpcMainInvokeEvent } from 'electron/main';
export class IpcMainImpl extends EventEmitter {
private _invokeHandlers: Map<string, (e: IpcMainInvokeEvent, ...args: any[]) => void> = new Map();
constructor () {
super();
// Do not throw exception when channel name is "error".
this.on('error', () => {});
}
handle: Electron.IpcMain['handle'] = (method, fn) => {
if (this._invokeHandlers.has(method)) {
throw new Error(`Attempted to register a second handler for '${method}'`);
}
if (typeof fn !== 'function') {
throw new Error(`Expected handler to be a function, but found type '${typeof fn}'`);
}
this._invokeHandlers.set(method, async (e, ...args) => {
try {
e._reply(await Promise.resolve(fn(e, ...args)));
} catch (err) {
e._throw(err as Error);
}
});
}
handleOnce: Electron.IpcMain['handleOnce'] = (method, fn) => {
this.handle(method, (e, ...args) => {
this.removeHandler(method);
return fn(e, ...args);
});
}
removeHandler (method: string) {
this._invokeHandlers.delete(method);
}
}