init claude-code

ink/events/emitter.ts

@@ -0,0 +1,39 @@
+import { EventEmitter as NodeEventEmitter } from 'events'
+import { Event } from './event.js'
+
+// Similar to node's builtin EventEmitter, but is also aware of our `Event`
+// class, and so `emit` respects `stopImmediatePropagation()`.
+export class EventEmitter extends NodeEventEmitter {
+  constructor() {
+    super()
+    // Disable the default maxListeners warning. In React, many components
+    // can legitimately listen to the same event (e.g., useInput hooks).
+    // The default limit of 10 causes spurious warnings.
+    this.setMaxListeners(0)
+  }
+
+  override emit(type: string | symbol, ...args: unknown[]): boolean {
+    // Delegate to node for `error`, since it's not treated like a normal event
+    if (type === 'error') {
+      return super.emit(type, ...args)
+    }
+
+    const listeners = this.rawListeners(type)
+
+    if (listeners.length === 0) {
+      return false
+    }
+
+    const ccEvent = args[0] instanceof Event ? args[0] : null
+
+    for (const listener of listeners) {
+      listener.apply(this, args)
+
+      if (ccEvent?.didStopImmediatePropagation()) {
+        break
+      }
+    }
+
+    return true
+  }
+}