@tamagui/react-native-web-lite/dist/esm/AppState/index.native.js

React Native for Web

import { canUseDOM, invariant } from "@tamagui/react-native-web-internals";
function _class_call_check(instance, Constructor) {
  if (!(instance instanceof Constructor)) throw new TypeError("Cannot call a class as a function");
}
function _defineProperties(target, props) {
  for (var i = 0; i < props.length; i++) {
    var descriptor = props[i];
    descriptor.enumerable = descriptor.enumerable || !1, descriptor.configurable = !0, "value" in descriptor && (descriptor.writable = !0), Object.defineProperty(target, descriptor.key, descriptor);
  }
}
function _create_class(Constructor, protoProps, staticProps) {
  return protoProps && _defineProperties(Constructor.prototype, protoProps), staticProps && _defineProperties(Constructor, staticProps), Constructor;
}
function _define_property(obj, key, value) {
  return key in obj ? Object.defineProperty(obj, key, {
    value,
    enumerable: !0,
    configurable: !0,
    writable: !0
  }) : obj[key] = value, obj;
}
var isPrefixed =
  // eslint-disable-next-line no-prototype-builtins
  canUseDOM && !document.hasOwnProperty("hidden") && document.hasOwnProperty("webkitHidden"),
  EVENT_TYPES = ["change", "memoryWarning"],
  VISIBILITY_CHANGE_EVENT = isPrefixed ? "webkitvisibilitychange" : "visibilitychange",
  VISIBILITY_STATE_PROPERTY = isPrefixed ? "webkitVisibilityState" : "visibilityState",
  AppStates = {
    BACKGROUND: "background",
    ACTIVE: "active"
  },
  EventEmitter = /* @__PURE__ */function () {
    "use strict";

    function EventEmitter2() {
      _class_call_check(this, EventEmitter2), _define_property(this, "listeners", {});
    }
    return _create_class(EventEmitter2, [{
      key: "addListener",
      value: function (type, handler) {
        var _this_listeners, _type, _;
        (_ = (_this_listeners = this.listeners)[_type = type]) !== null && _ !== void 0 || (_this_listeners[_type] = /* @__PURE__ */new Set()), this.listeners[type].add(handler);
      }
    }, {
      key: "emit",
      value: function (type, state) {
        var _this_listeners_type;
        (_this_listeners_type = this.listeners[type]) === null || _this_listeners_type === void 0 || _this_listeners_type.forEach(function (cb) {
          return cb(state);
        });
      }
    }, {
      key: "removeListener",
      value: function (type, handler) {
        var _this_listeners_type;
        (_this_listeners_type = this.listeners[type]) === null || _this_listeners_type === void 0 || _this_listeners_type.delete(handler);
      }
    }]), EventEmitter2;
  }(),
  hasBoundVisibilityChangeEvent = !1,
  changeEmitter = new EventEmitter(),
  AppState = /* @__PURE__ */function () {
    "use strict";

    function AppState2() {
      _class_call_check(this, AppState2);
    }
    return _create_class(AppState2, null, [{
      key: "currentState",
      get: function () {
        if (!AppState2.isAvailable) return AppStates.ACTIVE;
        switch (document[VISIBILITY_STATE_PROPERTY]) {
          case "hidden":
          case "prerender":
          case "unloaded":
            return AppStates.BACKGROUND;
          default:
            return AppStates.ACTIVE;
        }
      }
    }, {
      key: "addEventListener",
      value: function (type, handler) {
        if (AppState2.isAvailable && (invariant(EVENT_TYPES.indexOf(type) !== -1, 'Trying to subscribe to unknown event: "%s"', type), type === "change")) return hasBoundVisibilityChangeEvent || (hasBoundVisibilityChangeEvent = !0, document.addEventListener(VISIBILITY_CHANGE_EVENT, function () {
          changeEmitter && changeEmitter.emit("change", AppState2.currentState);
        }, !1)), changeEmitter.addListener(type, handler);
      }
    }]), AppState2;
  }();
_define_property(AppState, "isAvailable", canUseDOM && document[VISIBILITY_STATE_PROPERTY]);
export { AppState as default };
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