@alilc/lowcode-editor-core/es/event-bus.js

Core Api for Ali lowCode engine

import { Logger } from '@alilc/lowcode-utils';
import EventEmitter from 'events';
var logger = new Logger({
  level: 'warn',
  bizName: 'event-bus'
});
var moduleLogger = new Logger({
  level: 'warn',
  bizName: 'module-event-bus'
});
export var EventBus = /*#__PURE__*/function () {
  function EventBus(emitter, name) {
    this.eventEmitter = void 0;
    this.name = void 0;
    /**
     * 内核触发的事件名
     */
    this.names = [];
    this.eventEmitter = emitter;
    this.name = name;
  }
  var _proto = EventBus.prototype;
  _proto.getMsgPrefix = function getMsgPrefix(type) {
    if (this.name && this.name.length > 0) {
      return "[" + this.name + "][event-" + type + "]";
    } else {
      return "[*][event-" + type + "]";
    }
  };
  _proto.getLogger = function getLogger() {
    if (this.name && this.name.length > 0) {
      return moduleLogger;
    } else {
      return logger;
    }
  }

  /**
   * 监听事件
   * @param event 事件名称
   * @param listener 事件回调
   */;
  _proto.on = function on(event, listener) {
    var _this = this;
    this.eventEmitter.on(event, listener);
    this.getLogger().debug(this.getMsgPrefix('on') + " " + event);
    return function () {
      _this.off(event, listener);
    };
  };
  _proto.prependListener = function prependListener(event, listener) {
    var _this2 = this;
    this.eventEmitter.prependListener(event, listener);
    this.getLogger().debug(this.getMsgPrefix('prependListener') + " " + event);
    return function () {
      _this2.off(event, listener);
    };
  }

  /**
   * 取消监听事件
   * @param event 事件名称
   * @param listener 事件回调
   */;
  _proto.off = function off(event, listener) {
    this.eventEmitter.off(event, listener);
    this.getLogger().debug(this.getMsgPrefix('off') + " " + event);
  }

  /**
   * 触发事件
   * @param event 事件名称
   * @param args 事件参数
   * @returns
   */;
  _proto.emit = function emit(event) {
    var _this$eventEmitter, _this$getLogger;
    for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
      args[_key - 1] = arguments[_key];
    }
    (_this$eventEmitter = this.eventEmitter).emit.apply(_this$eventEmitter, [event].concat(args));
    (_this$getLogger = this.getLogger()).debug.apply(_this$getLogger, [this.getMsgPrefix('emit') + " name: " + event + ", args: "].concat(args));
  };
  _proto.removeListener = function removeListener(event, listener) {
    return this.eventEmitter.removeListener(event, listener);
  };
  _proto.addListener = function addListener(event, listener) {
    return this.eventEmitter.addListener(event, listener);
  };
  _proto.setMaxListeners = function setMaxListeners(n) {
    return this.eventEmitter.setMaxListeners(n);
  };
  _proto.removeAllListeners = function removeAllListeners(event) {
    return this.eventEmitter.removeAllListeners(event);
  };
  return EventBus;
}();
export var createModuleEventBus = function createModuleEventBus(moduleName, maxListeners) {
  var emitter = new EventEmitter();
  if (maxListeners) {
    emitter.setMaxListeners(maxListeners);
  }
  return new EventBus(emitter, moduleName);
};