react-native-gesture-handler/lib/typescript/mountRegistry.js

Declarative API exposing native platform touch and gesture system to React Native

// eslint-disable-next-line @typescript-eslint/no-extraneous-class
export class MountRegistry {
    static mountListeners = new Set();
    static unmountListeners = new Set();
    static addMountListener(listener) {
        this.mountListeners.add(listener);
        return () => {
            this.mountListeners.delete(listener);
        };
    }
    static addUnmountListener(listener) {
        this.unmountListeners.add(listener);
        return () => {
            this.unmountListeners.delete(listener);
        };
    }
    static gestureHandlerWillMount(handler) {
        this.mountListeners.forEach((listener) => listener(handler));
    }
    static gestureHandlerWillUnmount(handler) {
        this.unmountListeners.forEach((listener) => listener(handler));
    }
    static gestureWillMount(gesture) {
        this.mountListeners.forEach((listener) => listener(gesture));
    }
    static gestureWillUnmount(gesture) {
        this.unmountListeners.forEach((listener) => listener(gesture));
    }
}