@react-navigation/core/lib/commonjs/useOnPreventRemove.js

Core utilities for building navigators

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = useOnPreventRemove;
exports.shouldPreventRemove = void 0;
var React = _interopRequireWildcard(require("react"));
var _NavigationBuilderContext = _interopRequireDefault(require("./NavigationBuilderContext"));
var _NavigationRouteContext = _interopRequireDefault(require("./NavigationRouteContext"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function (nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }
function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
const VISITED_ROUTE_KEYS = Symbol('VISITED_ROUTE_KEYS');
const shouldPreventRemove = (emitter, beforeRemoveListeners, currentRoutes, nextRoutes, action) => {
  const nextRouteKeys = nextRoutes.map(route => route.key);

  // Call these in reverse order so last screens handle the event first
  const removedRoutes = currentRoutes.filter(route => !nextRouteKeys.includes(route.key)).reverse();
  const visitedRouteKeys =
  // @ts-expect-error: add this property to mark that we've already emitted this action
  action[VISITED_ROUTE_KEYS] ?? new Set();
  const beforeRemoveAction = {
    ...action,
    [VISITED_ROUTE_KEYS]: visitedRouteKeys
  };
  for (const route of removedRoutes) {
    var _beforeRemoveListener;
    if (visitedRouteKeys.has(route.key)) {
      // Skip if we've already emitted this action for this screen
      continue;
    }

    // First, we need to check if any child screens want to prevent it
    const isPrevented = (_beforeRemoveListener = beforeRemoveListeners[route.key]) === null || _beforeRemoveListener === void 0 ? void 0 : _beforeRemoveListener.call(beforeRemoveListeners, beforeRemoveAction);
    if (isPrevented) {
      return true;
    }
    visitedRouteKeys.add(route.key);
    const event = emitter.emit({
      type: 'beforeRemove',
      target: route.key,
      data: {
        action: beforeRemoveAction
      },
      canPreventDefault: true
    });
    if (event.defaultPrevented) {
      return true;
    }
  }
  return false;
};
exports.shouldPreventRemove = shouldPreventRemove;
function useOnPreventRemove(_ref) {
  let {
    getState,
    emitter,
    beforeRemoveListeners
  } = _ref;
  const {
    addKeyedListener
  } = React.useContext(_NavigationBuilderContext.default);
  const route = React.useContext(_NavigationRouteContext.default);
  const routeKey = route === null || route === void 0 ? void 0 : route.key;
  React.useEffect(() => {
    if (routeKey) {
      return addKeyedListener === null || addKeyedListener === void 0 ? void 0 : addKeyedListener('beforeRemove', routeKey, action => {
        const state = getState();
        return shouldPreventRemove(emitter, beforeRemoveListeners, state.routes, [], action);
      });
    }
  }, [addKeyedListener, beforeRemoveListeners, emitter, getState, routeKey]);
}
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