@toolpad/utils/dist/events.cjs.map

Shared utilities used by Toolpad packages.

{"version":3,"sources":["../src/events.ts"],"sourcesContent":["export type EventName = string | symbol;\n\nexport type EventHandlers = Record<EventName, unknown>;\n\nexport type EventHandler<T extends EventHandlers, K extends keyof T = keyof T> = (\n  event: T[K],\n) => void;\n\nexport type AllEventsHandler<T extends EventHandlers, K extends keyof T = keyof T> = (\n  type: K,\n  event: T[K],\n) => void;\n\n/**\n * Lightweight event emitter\n */\nexport class Emitter<T extends EventHandlers = {}> {\n  private handlers = new Map<keyof T, Set<EventHandler<T> | AllEventsHandler<T>>>();\n\n  /**\n   * Add a listener for an event\n   */\n  on(name: '*', handler: AllEventsHandler<T>): void;\n  on<K extends keyof T>(name: K, handler: EventHandler<T, K>): void;\n  on<K extends keyof T>(name: K | '*', handler: EventHandler<T, K> | AllEventsHandler<T>): void {\n    let eventHandlers = this.handlers.get(name);\n    if (!eventHandlers) {\n      eventHandlers = new Set();\n      this.handlers.set(name, eventHandlers);\n    }\n    eventHandlers.add(handler as EventHandler<T> | AllEventsHandler<T>);\n  }\n\n  /**\n   * Remove a listener from an event\n   */\n  off<K extends keyof T>(name: K, handler: EventHandler<T, K>) {\n    const eventHandlers = this.handlers.get(name);\n    if (eventHandlers) {\n      eventHandlers.delete(handler as EventHandler<T> | AllEventsHandler<T>);\n      if (eventHandlers.size <= 0) {\n        this.handlers.delete(name);\n      }\n    }\n  }\n\n  /**\n   * Subscribe to an event and return an unsubscribe function.\n   */\n  subscribe<K extends keyof T>(name: K, handler: EventHandler<T, K>) {\n    this.on(name, handler);\n    return () => {\n      this.off(name, handler);\n    };\n  }\n\n  /**\n   * Emit an event.\n   */\n  emit<K extends keyof T>(name: K, event: T[K]) {\n    const eventHandlers = this.handlers.get(name);\n    if (eventHandlers) {\n      for (const eventHandler of eventHandlers) {\n        (eventHandler as EventHandler<T, K>)(event);\n      }\n    }\n    const allHandlers = this.handlers.get('*');\n    if (allHandlers) {\n      for (const eventHandler of allHandlers) {\n        (eventHandler as AllEventsHandler<T>)(name, event);\n      }\n    }\n  }\n}\n"],"mappings":";;;;;;;;;;;;;;;;;;;;AAAA;AAAA;AAAA;AAAA;AAAA;AAgBO,IAAM,UAAN,MAA4C;AAAA,EAA5C;AACL,SAAQ,WAAW,oBAAI,IAAyD;AAAA;AAAA,EAOhF,GAAsB,MAAe,SAAyD;AAC5F,QAAI,gBAAgB,KAAK,SAAS,IAAI,IAAI;AAC1C,QAAI,CAAC,eAAe;AAClB,sBAAgB,oBAAI,IAAI;AACxB,WAAK,SAAS,IAAI,MAAM,aAAa;AAAA,IACvC;AACA,kBAAc,IAAI,OAAgD;AAAA,EACpE;AAAA;AAAA;AAAA;AAAA,EAKA,IAAuB,MAAS,SAA6B;AAC3D,UAAM,gBAAgB,KAAK,SAAS,IAAI,IAAI;AAC5C,QAAI,eAAe;AACjB,oBAAc,OAAO,OAAgD;AACrE,UAAI,cAAc,QAAQ,GAAG;AAC3B,aAAK,SAAS,OAAO,IAAI;AAAA,MAC3B;AAAA,IACF;AAAA,EACF;AAAA;AAAA;AAAA;AAAA,EAKA,UAA6B,MAAS,SAA6B;AACjE,SAAK,GAAG,MAAM,OAAO;AACrB,WAAO,MAAM;AACX,WAAK,IAAI,MAAM,OAAO;AAAA,IACxB;AAAA,EACF;AAAA;AAAA;AAAA;AAAA,EAKA,KAAwB,MAAS,OAAa;AAC5C,UAAM,gBAAgB,KAAK,SAAS,IAAI,IAAI;AAC5C,QAAI,eAAe;AACjB,iBAAW,gBAAgB,eAAe;AACxC,QAAC,aAAoC,KAAK;AAAA,MAC5C;AAAA,IACF;AACA,UAAM,cAAc,KAAK,SAAS,IAAI,GAAG;AACzC,QAAI,aAAa;AACf,iBAAW,gBAAgB,aAAa;AACtC,QAAC,aAAqC,MAAM,KAAK;AAAA,MACnD;AAAA,IACF;AAAA,EACF;AACF;","names":[]}