feat: add BrowserWindow.set/getWindowButtonPosition APIs (#37094)

shell/common/gin_converters/optional_converter.h

@@ -0,0 +1,36 @@
+// Copyright (c) 2023 Microsoft, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#ifndef ELECTRON_SHELL_COMMON_GIN_CONVERTERS_OPTIONAL_CONVERTER_H_
+#define ELECTRON_SHELL_COMMON_GIN_CONVERTERS_OPTIONAL_CONVERTER_H_
+
+#include <utility>
+
+#include "gin/converter.h"
+#include "third_party/abseil-cpp/absl/types/optional.h"
+
+namespace gin {
+
+template <typename T>
+struct Converter<absl::optional<T>> {
+  static v8::Local<v8::Value> ToV8(v8::Isolate* isolate,
+                                   const absl::optional<T>& val) {
+    if (val)
+      return Converter<T>::ToV8(isolate, val.value());
+    else
+      return v8::Null(isolate);
+  }
+  static bool FromV8(v8::Isolate* isolate,
+                     v8::Local<v8::Value> val,
+                     absl::optional<T>* out) {
+    T converted;
+    if (Converter<T>::FromV8(isolate, val, &converted))
+      out->emplace(std::move(converted));
+    return true;
+  }
+};
+
+}  // namespace gin
+
+#endif  // ELECTRON_SHELL_COMMON_GIN_CONVERTERS_OPTIONAL_CONVERTER_H_