From be1e77186e887a980716ed39a04433050cfeb30a Mon Sep 17 00:00:00 2001
From: Colin Kinloch <colin@kinlo.ch>
Date: Wed, 29 Mar 2023 15:28:17 +0100
Subject: [PATCH] Wayland: Set app_id for icon in kde (#718)

---
 src/gui/CMakeLists.txt        |  2 ++
 src/gui/CemuApp.cpp           |  9 +++++++++
 src/gui/MainWindow.cpp        | 10 ++++++++++
 src/gui/helpers/wxWayland.cpp | 24 ++++++++++++++++++++++++
 src/gui/helpers/wxWayland.h   |  9 ++++++---
 5 files changed, 51 insertions(+), 3 deletions(-)
 create mode 100644 src/gui/helpers/wxWayland.cpp

diff --git a/src/gui/CMakeLists.txt b/src/gui/CMakeLists.txt
index 23d8bb5e..30fb492a 100644
--- a/src/gui/CMakeLists.txt
+++ b/src/gui/CMakeLists.txt
@@ -69,6 +69,8 @@ add_library(CemuGui
   helpers/wxHelpers.cpp
   helpers/wxHelpers.h
   helpers/wxLogEvent.h
+  helpers/wxWayland.cpp
+  helpers/wxWayland.h
   input/InputAPIAddWindow.cpp
   input/InputAPIAddWindow.h
   input/InputSettings2.cpp
diff --git a/src/gui/CemuApp.cpp b/src/gui/CemuApp.cpp
index a19981b0..92ba9436 100644
--- a/src/gui/CemuApp.cpp
+++ b/src/gui/CemuApp.cpp
@@ -12,6 +12,10 @@
 #include "gui/helpers/wxHelpers.h"
 #include "Cemu/ncrypto/ncrypto.h"
 
+#if BOOST_OS_LINUX && HAS_WAYLAND
+#include "gui/helpers/wxWayland.h"
+#endif
+
 #include <wx/image.h>
 #include <wx/filename.h>
 #include <wx/stdpaths.h>
@@ -176,6 +180,11 @@ bool CemuApp::OnInit()
 	SetTopWindow(m_mainFrame);
 	m_mainFrame->Show();
 
+#if BOOST_OS_LINUX && HAS_WAYLAND
+	if (wxWlIsWaylandWindow(m_mainFrame))
+		wxWlSetAppId(m_mainFrame, "info.cemu.Cemu");
+#endif
+
 	// show warning on macOS about state of builds
 #if BOOST_OS_MACOS
 	if (!GetConfig().did_show_macos_disclaimer)
diff --git a/src/gui/MainWindow.cpp b/src/gui/MainWindow.cpp
index 40830547..1a87af0a 100644
--- a/src/gui/MainWindow.cpp
+++ b/src/gui/MainWindow.cpp
@@ -57,6 +57,10 @@
 #include "resource/embedded/resources.h"
 #endif
 
+#if BOOST_OS_LINUX && HAS_WAYLAND
+#include "gui/helpers/wxWayland.h"
+#endif
+
 #include "Cafe/TitleList/TitleInfo.h"
 #include "Cafe/TitleList/TitleList.h"
 #include "wxHelper.h"
@@ -753,6 +757,12 @@ void MainWindow::TogglePadView()
 		m_padView->Bind(wxEVT_CLOSE_WINDOW, &MainWindow::OnPadClose, this);
 
 		m_padView->Show(true);
+
+#if BOOST_OS_LINUX && HAS_WAYLAND
+		if (wxWlIsWaylandWindow(m_padView))
+			wxWlSetAppId(m_padView, "info.cemu.Cemu");
+#endif
+
 		m_padView->Initialize();
 		if (m_game_launched)
 			m_padView->InitializeRenderCanvas();
diff --git a/src/gui/helpers/wxWayland.cpp b/src/gui/helpers/wxWayland.cpp
new file mode 100644
index 00000000..c677451c
--- /dev/null
+++ b/src/gui/helpers/wxWayland.cpp
@@ -0,0 +1,24 @@
+#include "gui/helpers/wxWayland.h"
+
+#if BOOST_OS_LINUX && HAS_WAYLAND
+
+#include <dlfcn.h>
+
+bool wxWlIsWaylandWindow(wxWindow* window)
+{
+	GtkWidget* gtkWindow = static_cast<GtkWidget*>(window->GetHandle());
+	GdkWindow* gdkWindow = gtk_widget_get_window(gtkWindow);
+	return GDK_IS_WAYLAND_WINDOW(gdkWindow);
+}
+
+void wxWlSetAppId(wxFrame* frame, const char* applicationId)
+{
+	GtkWidget* gtkWindow = static_cast<GtkWidget*>(frame->GetHandle());
+	gtk_widget_realize(gtkWindow);
+	GdkWindow* gdkWindow = gtk_widget_get_window(gtkWindow);
+	static auto gdk_wl_set_app_id = reinterpret_cast<void (*) (GdkWindow*, const char*)>(dlsym(nullptr, "gdk_wayland_window_set_application_id"));
+	if (gdk_wl_set_app_id)
+		gdk_wl_set_app_id(gdkWindow, applicationId);
+}
+
+#endif	// BOOST_OS_LINUX && HAS_WAYLAND
diff --git a/src/gui/helpers/wxWayland.h b/src/gui/helpers/wxWayland.h
index 7aa075db..f921783b 100644
--- a/src/gui/helpers/wxWayland.h
+++ b/src/gui/helpers/wxWayland.h
@@ -1,6 +1,6 @@
 #pragma once
 
-#if BOOST_OS_LINUX
+#if BOOST_OS_LINUX && HAS_WAYLAND
 
 #include <gdk/gdk.h>
 #include <gdk/gdkwayland.h>
@@ -27,7 +27,7 @@ class wxWlSubsurface
 	int32_t m_xPos = 0;
 	int32_t m_yPos = 0;
 
-   public:
+public:
 	wxWlSubsurface(wxWindow* window)
 	{
 		GtkWidget* widget = static_cast<GtkWidget*>(window->GetHandle());
@@ -72,4 +72,7 @@ class wxWlSubsurface
 	}
 };
 
-#endif	// BOOST_OS_LINUX
+bool wxWlIsWaylandWindow(wxWindow* window);
+void wxWlSetAppId(wxFrame* frame, const char* application_id);
+
+#endif	// BOOST_OS_LINUX && HAS_WAYLAND