From c6dcc57c5e2b67a93f97def157c5dbdd0b2b994c Mon Sep 17 00:00:00 2001
From: Ilya Fedin <fedin-ilja2010@ya.ru>
Date: Sun, 30 May 2021 15:05:07 +0400
Subject: [PATCH] Set _KDE_NET_WM_DESKTOP_FILE on X11

---
 .../platform/linux/main_window_linux.cpp      | 37 +++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/Telegram/SourceFiles/platform/linux/main_window_linux.cpp b/Telegram/SourceFiles/platform/linux/main_window_linux.cpp
index 091bd46c6c..73b9c8edee 100644
--- a/Telegram/SourceFiles/platform/linux/main_window_linux.cpp
+++ b/Telegram/SourceFiles/platform/linux/main_window_linux.cpp
@@ -133,6 +133,39 @@ void XCBSkipTaskbar(QWindow *window, bool skip) {
 			| XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY,
 		reinterpret_cast<const char*>(&xev));
 }
+
+void XCBSetDesktopFileName(QWindow *window) {
+	const auto connection = base::Platform::XCB::GetConnectionFromQt();
+	if (!connection) {
+		return;
+	}
+
+	const auto desktopFileAtom = base::Platform::XCB::GetAtom(
+		connection,
+		"_KDE_NET_WM_DESKTOP_FILE");
+
+	const auto utf8Atom = base::Platform::XCB::GetAtom(
+		connection,
+		"UTF8_STRING");
+
+	if (!desktopFileAtom.has_value() || !utf8Atom.has_value()) {
+		return;
+	}
+
+	const auto filename = QGuiApplication::desktopFileName()
+		.chopped(8)
+		.toUtf8();
+
+	xcb_change_property(
+		connection,
+		XCB_PROP_MODE_REPLACE,
+		window->winId(),
+		*desktopFileAtom,
+		*utf8Atom,
+		8,
+		filename.size(),
+		filename.data());
+}
 #endif // !DESKTOP_APP_DISABLE_X11_INTEGRATION
 
 void SkipTaskbar(QWindow *window, bool skip) {
@@ -683,6 +716,10 @@ void MainWindow::initHook() {
 	}
 #endif // !DESKTOP_APP_DISABLE_DBUS_INTEGRATION
 
+#ifndef DESKTOP_APP_DISABLE_X11_INTEGRATION
+	XCBSetDesktopFileName(windowHandle());
+#endif // !DESKTOP_APP_DISABLE_X11_INTEGRATION
+
 	LOG(("System tray available: %1").arg(Logs::b(trayAvailable())));
 }