From ca67ac913fbb51d431dacd5fc06c56109bb176b8 Mon Sep 17 00:00:00 2001
From: Ilya Fedin <fedin-ilja2010@ya.ru>
Date: Thu, 15 Oct 2020 20:31:40 +0400
Subject: [PATCH] Check for KDE portal backend when using portals on KDE

---
 .../platform/linux/specific_linux.cpp         | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/Telegram/SourceFiles/platform/linux/specific_linux.cpp b/Telegram/SourceFiles/platform/linux/specific_linux.cpp
index 799e0f3fa3..d88e91c80f 100644
--- a/Telegram/SourceFiles/platform/linux/specific_linux.cpp
+++ b/Telegram/SourceFiles/platform/linux/specific_linux.cpp
@@ -123,6 +123,14 @@ void PortalAutostart(bool autostart, bool silent = false) {
 	}
 }
 
+bool IsXDGDesktopPortalKDEPresent() {
+	static const auto Result = QDBusInterface(
+		qsl("org.freedesktop.impl.portal.desktop.kde"),
+		kXDGDesktopPortalObjectPath.utf16()).isValid();
+
+	return Result;
+}
+
 uint FileChooserPortalVersion() {
 	static const auto Result = [&]() -> uint {
 		auto message = QDBusMessage::createMethodCall(
@@ -731,17 +739,20 @@ bool IsXDGDesktopPortalPresent() {
 }
 
 bool UseXDGDesktopPortal() {
+#ifndef DESKTOP_APP_DISABLE_DBUS_INTEGRATION
 	static const auto Result = [&] {
 		const auto envVar = qEnvironmentVariableIsSet("TDESKTOP_USE_PORTAL");
 		const auto portalPresent = IsXDGDesktopPortalPresent();
+		const auto neededForKde = DesktopEnvironment::IsKDE()
+			&& IsXDGDesktopPortalKDEPresent();
 
-		return (
-			DesktopEnvironment::IsKDE()
-				|| envVar
-			) && portalPresent;
+		return (neededForKde || envVar) && portalPresent;
 	}();
 
 	return Result;
+#endif // !DESKTOP_APP_DISABLE_DBUS_INTEGRATION
+
+	return false;
 }
 
 bool CanOpenDirectoryWithPortal() {