refactor: remove IAppUtil. AppUtil is the base class now

src/lib/deskflow/AppUtil.h

@@ -1,5 +1,6 @@
 /*
  * Deskflow -- mouse and keyboard sharing utility
+ * SPDX-FileCopyrightText: (C) 2025 Deskflow Developers
  * SPDX-FileCopyrightText: (C) 2012 - 2016 Symless Ltd.
  * SPDX-FileCopyrightText: (C) 2002 Chris Schoeneman
  * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
@@ -8,16 +9,19 @@
 #pragma once
 
 #include "deskflow/DeskflowException.h"
-#include "deskflow/IAppUtil.h"
+#include "deskflow/IApp.h"
 
-class AppUtil : public IAppUtil
+#include <string>
+#include <vector>
+
+class AppUtil
 {
 public:
   AppUtil();
-  ~AppUtil() override = default;
+  virtual ~AppUtil() = default;
 
-  void adoptApp(IApp *app) override;
-  IApp &app() const override;
+  void adoptApp(IApp *app);
+  IApp &app() const;
   virtual void exitApp(int code)
   {
     throw ExitAppException(code);
@@ -29,6 +33,12 @@ public:
     instance().exitApp(code);
   }
 
+  // Virtual Methods subclasses can impliment
+  virtual int run(int argc, char **argv) = 0;
+  virtual void startNode() = 0;
+  virtual std::vector<std::string> getKeyboardLayoutList() = 0;
+  virtual std::string getCurrentLanguageCode() = 0;
+
 private:
   IApp *m_app = nullptr;
   static AppUtil *s_instance;

src/lib/deskflow/CMakeLists.txt

@@ -89,7 +89,6 @@ add_library(${lib_name} STATIC ${PLATFORM_CODE}
   DeskflowException.h
   DisplayInvalidException.h
   IApp.h
-  IAppUtil.h
   IClient.h
   IClipboard.cpp
   IClipboard.h

src/lib/deskflow/IAppUtil.h

@@ -1,26 +0,0 @@
-/*
- * Deskflow -- mouse and keyboard sharing utility
- * SPDX-FileCopyrightText: (C) 2025 Deskflow Developers
- * SPDX-FileCopyrightText: (C) 2012 - 2016 Symless Ltd.
- * SPDX-FileCopyrightText: (C) 2002 Chris Schoeneman
- * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
- */
-
-#pragma once
-
-#include "deskflow/IApp.h"
-
-#include <string>
-#include <vector>
-
-class IAppUtil
-{
-public:
-  virtual ~IAppUtil() = default;
-  virtual void adoptApp(IApp *app) = 0;
-  virtual IApp &app() const = 0;
-  virtual int run(int argc, char **argv) = 0;
-  virtual void startNode() = 0;
-  virtual std::vector<std::string> getKeyboardLayoutList() = 0;
-  virtual std::string getCurrentLanguageCode() = 0;
-};