create-expo-cljs-app/template/node_modules/react-native-screens/lib/commonjs/native-stack/utils/useBackPressSubscription.js

Create a react native application with Expo and Shadow-CLJS!

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.useBackPressSubscription = useBackPressSubscription;

var _react = _interopRequireDefault(require("react"));

var _reactNative = require("react-native");

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/**
 * This hook is an abstraction for keeping back press subscription
 * logic in one place.
 */
function useBackPressSubscription({
  onBackPress,
  isDisabled
}) {
  const [isActive, setIsActive] = _react.default.useState(false);

  const subscription = _react.default.useRef();

  const clearSubscription = _react.default.useCallback((shouldSetActive = true) => {
    var _subscription$current;

    (_subscription$current = subscription.current) === null || _subscription$current === void 0 ? void 0 : _subscription$current.remove();
    subscription.current = undefined;
    if (shouldSetActive) setIsActive(false);
  }, []);

  const createSubscription = _react.default.useCallback(() => {
    if (!isDisabled) {
      var _subscription$current2;

      (_subscription$current2 = subscription.current) === null || _subscription$current2 === void 0 ? void 0 : _subscription$current2.remove();
      subscription.current = _reactNative.BackHandler.addEventListener('hardwareBackPress', onBackPress);
      setIsActive(true);
    }
  }, [isDisabled, onBackPress]);

  const handleAttached = _react.default.useCallback(() => {
    if (isActive) {
      createSubscription();
    }
  }, [createSubscription, isActive]);

  const handleDetached = _react.default.useCallback(() => {
    clearSubscription(false);
  }, [clearSubscription]);

  _react.default.useEffect(() => {
    if (isDisabled) {
      clearSubscription();
    }
  }, [isDisabled, clearSubscription]);

  return {
    handleAttached,
    handleDetached,
    createSubscription,
    clearSubscription
  };
}
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