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

React Native for Web

var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __export = (target, all) => {
  for (var name in all) __defProp(target, name, {
    get: all[name],
    enumerable: true
  });
};
var __copyProps = (to, from, except, desc) => {
  if (from && typeof from === "object" || typeof from === "function") {
    for (let key of __getOwnPropNames(from)) if (!__hasOwnProp.call(to, key) && key !== except) __defProp(to, key, {
      get: () => from[key],
      enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable
    });
  }
  return to;
};
var __toCommonJS = mod => __copyProps(__defProp({}, "__esModule", {
  value: true
}), mod);
var AppState_exports = {};
__export(AppState_exports, {
  AppState: () => AppState
});
module.exports = __toCommonJS(AppState_exports);
var import_react_native_web_internals = require("@tamagui/react-native-web-internals");
const isPrefixed =
// eslint-disable-next-line no-prototype-builtins
import_react_native_web_internals.canUseDOM && !document.hasOwnProperty("hidden") && document.hasOwnProperty("webkitHidden");
const EVENT_TYPES = ["change", "memoryWarning"];
const VISIBILITY_CHANGE_EVENT = isPrefixed ? "webkitvisibilitychange" : "visibilitychange";
const VISIBILITY_STATE_PROPERTY = isPrefixed ? "webkitVisibilityState" : "visibilityState";
const AppStates = {
  BACKGROUND: "background",
  ACTIVE: "active"
};
class EventEmitter {
  listeners = {};
  addListener(type, handler) {
    this.listeners[type] ??= /* @__PURE__ */new Set();
    this.listeners[type].add(handler);
  }
  emit(type, state) {
    this.listeners[type]?.forEach(cb => cb(state));
  }
  removeListener(type, handler) {
    this.listeners[type]?.delete(handler);
  }
}
let hasBoundVisibilityChangeEvent = false;
const changeEmitter = new EventEmitter();
class AppState {
  static isAvailable = import_react_native_web_internals.canUseDOM && document[VISIBILITY_STATE_PROPERTY];
  static get currentState() {
    if (!AppState.isAvailable) {
      return AppStates.ACTIVE;
    }
    switch (document[VISIBILITY_STATE_PROPERTY]) {
      case "hidden":
      case "prerender":
      case "unloaded":
        return AppStates.BACKGROUND;
      default:
        return AppStates.ACTIVE;
    }
  }
  static addEventListener(type, handler) {
    if (AppState.isAvailable) {
      (0, import_react_native_web_internals.invariant)(EVENT_TYPES.indexOf(type) !== -1, 'Trying to subscribe to unknown event: "%s"', type);
      if (type === "change") {
        if (!hasBoundVisibilityChangeEvent) {
          hasBoundVisibilityChangeEvent = true;
          document.addEventListener(VISIBILITY_CHANGE_EVENT, () => {
            if (changeEmitter) {
              changeEmitter.emit("change", AppState.currentState);
            }
          }, false);
        }
        return changeEmitter.addListener(type, handler);
      }
    }
  }
}