Initial Commit

node_modules/strict-event-emitter/lib/index.mjs

@@ -0,0 +1,171 @@
+// src/MemoryLeakError.ts
+var MemoryLeakError = class extends Error {
+  constructor(emitter, type, count) {
+    super(
+      `Possible EventEmitter memory leak detected. ${count} ${type.toString()} listeners added. Use emitter.setMaxListeners() to increase limit`
+    );
+    this.emitter = emitter;
+    this.type = type;
+    this.count = count;
+    this.name = "MaxListenersExceededWarning";
+  }
+};
+
+// src/Emitter.ts
+var _Emitter = class {
+  static listenerCount(emitter, eventName) {
+    return emitter.listenerCount(eventName);
+  }
+  constructor() {
+    this.events = /* @__PURE__ */ new Map();
+    this.maxListeners = _Emitter.defaultMaxListeners;
+    this.hasWarnedAboutPotentialMemoryLeak = false;
+  }
+  _emitInternalEvent(internalEventName, eventName, listener) {
+    this.emit(
+      internalEventName,
+      ...[eventName, listener]
+    );
+  }
+  _getListeners(eventName) {
+    return Array.prototype.concat.apply([], this.events.get(eventName)) || [];
+  }
+  _removeListener(listeners, listener) {
+    const index = listeners.indexOf(listener);
+    if (index > -1) {
+      listeners.splice(index, 1);
+    }
+    return [];
+  }
+  _wrapOnceListener(eventName, listener) {
+    const onceListener = (...data) => {
+      this.removeListener(eventName, onceListener);
+      return listener.apply(this, data);
+    };
+    Object.defineProperty(onceListener, "name", { value: listener.name });
+    return onceListener;
+  }
+  setMaxListeners(maxListeners) {
+    this.maxListeners = maxListeners;
+    return this;
+  }
+  /**
+   * Returns the current max listener value for the `Emitter` which is
+   * either set by `emitter.setMaxListeners(n)` or defaults to
+   * `Emitter.defaultMaxListeners`.
+   */
+  getMaxListeners() {
+    return this.maxListeners;
+  }
+  /**
+   * Returns an array listing the events for which the emitter has registered listeners.
+   * The values in the array will be strings or Symbols.
+   */
+  eventNames() {
+    return Array.from(this.events.keys());
+  }
+  /**
+   * Synchronously calls each of the listeners registered for the event named `eventName`,
+   * in the order they were registered, passing the supplied arguments to each.
+   * Returns `true` if the event has listeners, `false` otherwise.
+   *
+   * @example
+   * const emitter = new Emitter<{ hello: [string] }>()
+   * emitter.emit('hello', 'John')
+   */
+  emit(eventName, ...data) {
+    const listeners = this._getListeners(eventName);
+    listeners.forEach((listener) => {
+      listener.apply(this, data);
+    });
+    return listeners.length > 0;
+  }
+  addListener(eventName, listener) {
+    this._emitInternalEvent("newListener", eventName, listener);
+    const nextListeners = this._getListeners(eventName).concat(listener);
+    this.events.set(eventName, nextListeners);
+    if (this.maxListeners > 0 && this.listenerCount(eventName) > this.maxListeners && !this.hasWarnedAboutPotentialMemoryLeak) {
+      this.hasWarnedAboutPotentialMemoryLeak = true;
+      const memoryLeakWarning = new MemoryLeakError(
+        this,
+        eventName,
+        this.listenerCount(eventName)
+      );
+      console.warn(memoryLeakWarning);
+    }
+    return this;
+  }
+  on(eventName, listener) {
+    return this.addListener(eventName, listener);
+  }
+  once(eventName, listener) {
+    return this.addListener(
+      eventName,
+      this._wrapOnceListener(eventName, listener)
+    );
+  }
+  prependListener(eventName, listener) {
+    const listeners = this._getListeners(eventName);
+    if (listeners.length > 0) {
+      const nextListeners = [listener].concat(listeners);
+      this.events.set(eventName, nextListeners);
+    } else {
+      this.events.set(eventName, listeners.concat(listener));
+    }
+    return this;
+  }
+  prependOnceListener(eventName, listener) {
+    return this.prependListener(
+      eventName,
+      this._wrapOnceListener(eventName, listener)
+    );
+  }
+  removeListener(eventName, listener) {
+    const listeners = this._getListeners(eventName);
+    if (listeners.length > 0) {
+      this._removeListener(listeners, listener);
+      this.events.set(eventName, listeners);
+      this._emitInternalEvent("removeListener", eventName, listener);
+    }
+    return this;
+  }
+  /**
+   * Alias for `emitter.removeListener()`.
+   *
+   * @example
+   * emitter.off('hello', listener)
+   */
+  off(eventName, listener) {
+    return this.removeListener(eventName, listener);
+  }
+  removeAllListeners(eventName) {
+    if (eventName) {
+      this.events.delete(eventName);
+    } else {
+      this.events.clear();
+    }
+    return this;
+  }
+  /**
+   * Returns a copy of the array of listeners for the event named `eventName`.
+   */
+  listeners(eventName) {
+    return Array.from(this._getListeners(eventName));
+  }
+  /**
+   * Returns the number of listeners listening to the event named `eventName`.
+   */
+  listenerCount(eventName) {
+    return this._getListeners(eventName).length;
+  }
+  rawListeners(eventName) {
+    return this.listeners(eventName);
+  }
+};
+var Emitter = _Emitter;
+Emitter.defaultMaxListeners = 10;
+export {
+  Emitter,
+  MemoryLeakError
+};
+//# sourceMappingURL=index.mjs.map