Add EmitEvent function to replace node::MakeCallback

atom/common/event_emitter_caller.cc

@@ -0,0 +1,33 @@
+// Copyright (c) 2015 GitHub, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#include "atom/common/event_emitter_caller.h"
+
+namespace mate {
+
+namespace internal {
+
+v8::Local<v8::Value> CallEmitWithArgs(v8::Isolate* isolate,
+                                      v8::Local<v8::Object> obj,
+                                      ValueVector* args) {
+  v8::Local<v8::String> emit_name = StringToSymbol(isolate, "emit");
+  v8::Local<v8::Value> emit = obj->Get(emit_name);
+  if (emit.IsEmpty() || !emit->IsFunction()) {
+    isolate->ThrowException(v8::Exception::TypeError(
+        StringToV8(isolate, "\"emit\" is not a function")));
+    return v8::Undefined(isolate);
+  }
+
+  v8::MaybeLocal<v8::Value> result = emit.As<v8::Function>()->Call(
+      isolate->GetCurrentContext(), obj, args->size(), &args->front());
+  if (result.IsEmpty()) {
+    return v8::Undefined(isolate);
+  }
+
+  return result.ToLocalChecked();
+}
+
+}  // namespace internal
+
+}  // namespace mate