refactor: simplify events (#37099)

shell/common/gin_helper/event.h

@@ -0,0 +1,48 @@
+// Copyright (c) 2023 Salesforce, 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_HELPER_EVENT_H_
+#define ELECTRON_SHELL_COMMON_GIN_HELPER_EVENT_H_
+
+#include "gin/handle.h"
+#include "gin/wrappable.h"
+#include "shell/common/gin_helper/constructible.h"
+
+namespace v8 {
+class Isolate;
+template <typename T>
+class Local;
+class Object;
+class ObjectTemplate;
+}  // namespace v8
+
+namespace gin_helper::internal {
+
+class Event : public gin::Wrappable<Event>,
+              public gin_helper::Constructible<Event> {
+ public:
+  // gin_helper::Constructible
+  static gin::Handle<Event> New(v8::Isolate* isolate);
+  static v8::Local<v8::ObjectTemplate> FillObjectTemplate(
+      v8::Isolate* isolate,
+      v8::Local<v8::ObjectTemplate> prototype);
+
+  // gin::Wrappable
+  static gin::WrapperInfo kWrapperInfo;
+
+  ~Event() override;
+
+  void PreventDefault() { default_prevented_ = true; }
+
+  bool GetDefaultPrevented() { return default_prevented_; }
+
+ private:
+  Event();
+
+  bool default_prevented_ = false;
+};
+
+}  // namespace gin_helper::internal
+
+#endif  // ELECTRON_SHELL_COMMON_GIN_HELPER_EVENT_H_