Add support for choosing directories via xdg-desktop-portal

Telegram/SourceFiles/platform/linux/file_utilities_linux.cpp

@@ -127,13 +127,14 @@ using Type = ::FileDialog::internal::Type;
 bool NativeSupported(Type type = Type::ReadFile) {
 	// use gtk file dialog on gtk-based desktop environments
 	// or if QT_QPA_PLATFORMTHEME=(gtk2|gtk3)
-	// or if portals is used and operation is not to open folder
+	// or if portals is used and operation is to open folder
-	// (it isn't supported by portals yet)
+	// and portal doesn't support folder choosing
 	return Platform::UseGtkFileDialog()
 		&& (Platform::DesktopEnvironment::IsGtkBased()
 			|| Platform::IsGtkIntegrationForced()
 			|| Platform::UseXDGDesktopPortal())
-		&& (!Platform::UseXDGDesktopPortal() || type == Type::ReadFolder)
+		&& (!Platform::UseXDGDesktopPortal()
+			|| (type == Type::ReadFolder && !Platform::CanOpenDirectoryWithPortal()))
 		&& Platform::internal::GdkHelperLoaded()
 		&& (Libs::gtk_widget_hide_on_delete != nullptr)
 		&& (Libs::gtk_clipboard_store != nullptr)

Telegram/SourceFiles/platform/linux/specific_linux.cpp

@@ -51,6 +51,10 @@ constexpr auto kDesktopFile = ":/misc/telegramdesktop.desktop"_cs;
 constexpr auto kSnapLauncherDir = "/var/lib/snapd/desktop/applications/"_cs;
 constexpr auto kIconName = "telegram"_cs;
 
+constexpr auto kXDGDesktopPortalService = "org.freedesktop.portal.Desktop"_cs;
+constexpr auto kXDGDesktopPortalObjectPath = "/org/freedesktop/portal/desktop"_cs;
+constexpr auto kPropertiesInterface = "org.freedesktop.DBus.Properties"_cs;
+
 #ifndef TDESKTOP_DISABLE_DBUS_INTEGRATION
 void PortalAutostart(bool autostart, bool silent = false) {
 	QVariantMap options;
@@ -63,8 +67,8 @@ void PortalAutostart(bool autostart, bool silent = false) {
 	options["dbus-activatable"] = false;
 
 	auto message = QDBusMessage::createMethodCall(
-		qsl("org.freedesktop.portal.Desktop"),
+		kXDGDesktopPortalService.utf16(),
-		qsl("/org/freedesktop/portal/desktop"),
+		kXDGDesktopPortalObjectPath.utf16(),
 		qsl("org.freedesktop.portal.Background"),
 		qsl("RequestBackground"));
 
@@ -84,6 +88,34 @@ void PortalAutostart(bool autostart, bool silent = false) {
 		}
 	}
 }
+
+uint FileChooserPortalVersion() {
+	static const auto Result = [&]() -> uint {
+		auto message = QDBusMessage::createMethodCall(
+			kXDGDesktopPortalService.utf16(),
+			kXDGDesktopPortalObjectPath.utf16(),
+			kPropertiesInterface.utf16(),
+			qsl("Get"));
+
+		message.setArguments({
+			qsl("org.freedesktop.portal.FileChooser"),
+			qsl("version")
+		});
+
+		const QDBusReply<uint> reply = QDBusConnection::sessionBus().call(message);
+
+		if (reply.isValid()) {
+			return reply.value();
+		} else {
+			LOG(("Error getting FileChooser portal version: %1")
+				.arg(reply.error().message()));
+		}
+
+		return 0;
+	}();
+
+	return Result;
+}
 #endif // !TDESKTOP_DISABLE_DBUS_INTEGRATION
 
 bool RunShellCommand(const QByteArray &command) {
@@ -296,8 +328,8 @@ bool IsQtPluginsBundled() {
 bool IsXDGDesktopPortalPresent() {
 #ifndef TDESKTOP_DISABLE_DBUS_INTEGRATION
 	static const auto Result = QDBusInterface(
-		"org.freedesktop.portal.Desktop",
+		kXDGDesktopPortalService.utf16(),
-		"/org/freedesktop/portal/desktop").isValid();
+		kXDGDesktopPortalObjectPath.utf16()).isValid();
 
 	return Result;
 #endif // !TDESKTOP_DISABLE_DBUS_INTEGRATION
@@ -320,6 +352,14 @@ bool UseXDGDesktopPortal() {
 	return Result;
 }
 
+bool CanOpenDirectoryWithPortal() {
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 15, 0) || defined DESKTOP_APP_QT_PATCHED) && !defined TDESKTOP_DISABLE_DBUS_INTEGRATION
+	return FileChooserPortalVersion() >= 3;
+#else // (Qt >= 5.15 || DESKTOP_APP_QT_PATCHED) && !TDESKTOP_DISABLE_DBUS_INTEGRATION
+	return false;
+#endif // (Qt < 5.15 && !DESKTOP_APP_QT_PATCHED) || TDESKTOP_DISABLE_DBUS_INTEGRATION
+}
+
 QString ProcessNameByPID(const QString &pid) {
 	constexpr auto kMaxPath = 1024;
 	char result[kMaxPath] = { 0 };
@@ -682,10 +722,10 @@ void start() {
 		if (IsXDGDesktopPortalPresent()) {
 			LOG(("XDG Desktop Portal is present!"));
 			if (UseXDGDesktopPortal()) {
-				LOG(("Usage of XDG Desktop Portal is enabled."));
+				LOG(("Using XDG Desktop Portal."));
 				qputenv("QT_QPA_PLATFORMTHEME", "xdgdesktopportal");
 			} else {
-				LOG(("Usage of XDG Desktop Portal is disabled."));
+				LOG(("Not using XDG Desktop Portal."));
 			}
 		} else {
 			LOG(("XDG Desktop Portal is not present :("));

Telegram/SourceFiles/platform/linux/specific_linux.h

@@ -30,6 +30,7 @@ bool IsQtPluginsBundled();
 
 bool IsXDGDesktopPortalPresent();
 bool UseXDGDesktopPortal();
+bool CanOpenDirectoryWithPortal();
 
 QString ProcessNameByPID(const QString &pid);
 QString RealExecutablePath(int argc, char *argv[]);