From f4d5f31f2ad24a605479d968fc5af5cf80aee900 Mon Sep 17 00:00:00 2001
From: Ilya Fedin <fedin-ilja2010@ya.ru>
Date: Wed, 31 Mar 2021 12:32:23 +0400
Subject: [PATCH 1/3] Fix ifndef of gtk integration in settings

---
 Telegram/SourceFiles/kotato/settings_menu.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Telegram/SourceFiles/kotato/settings_menu.cpp b/Telegram/SourceFiles/kotato/settings_menu.cpp
index e5ec3a887..939442948 100644
--- a/Telegram/SourceFiles/kotato/settings_menu.cpp
+++ b/Telegram/SourceFiles/kotato/settings_menu.cpp
@@ -438,7 +438,7 @@ void SetupKotatoSystem(
 	AddSkip(container);
 	AddSubsectionTitle(container, tr::ktg_settings_system());
 
-#ifndef TDESKTOP_DISABLE_GTK_INTEGRATION
+#ifndef DESKTOP_APP_DISABLE_GTK_INTEGRATION
 	if (Platform::IsLinux()) {
 		const auto gtkIntegrationToggled = Ui::CreateChild<rpl::event_stream<bool>>(
 			container.get());
@@ -467,7 +467,7 @@ void SetupKotatoSystem(
 				cancelled));
 		}, container->lifetime());
 	}
-#endif // !TDESKTOP_DISABLE_GTK_INTEGRATION
+#endif // !DESKTOP_APP_DISABLE_GTK_INTEGRATION
 
 	if (Platform::IsMac()) {
 		const auto useNativeDecorationsToggled = Ui::CreateChild<rpl::event_stream<bool>>(

From a618181120519a83b5957632c9e34ee52f0706ea Mon Sep 17 00:00:00 2001
From: Ilya Fedin <fedin-ilja2010@ya.ru>
Date: Wed, 31 Mar 2021 12:33:13 +0400
Subject: [PATCH 2/3] Make RadioBox API simpler

---
 .../kotato/customboxes/radio_box.cpp          | 18 ++++----
 .../kotato/customboxes/radio_box.h            |  7 ++--
 Telegram/SourceFiles/kotato/settings_menu.cpp | 41 ++++---------------
 3 files changed, 23 insertions(+), 43 deletions(-)

diff --git a/Telegram/SourceFiles/kotato/customboxes/radio_box.cpp b/Telegram/SourceFiles/kotato/customboxes/radio_box.cpp
index c16b535a9..6d1502c55 100644
--- a/Telegram/SourceFiles/kotato/customboxes/radio_box.cpp
+++ b/Telegram/SourceFiles/kotato/customboxes/radio_box.cpp
@@ -23,12 +23,14 @@ RadioBox::RadioBox(
 	QWidget*,
 	const QString &title,
 	int currentValue,
-	const QMap<int, QString> &options,
+	int valueCount,
+	Fn<QString(int)> labelGetter,
 	Fn<void(int)> saveCallback,
 	bool warnRestart)
 : _title(title)
 , _startValue(currentValue)
-, _options(options)
+, _valueCount(valueCount)
+, _labelGetter(labelGetter)
 , _saveCallback(std::move(saveCallback))
 , _warnRestart(warnRestart) {
 }
@@ -38,13 +40,15 @@ RadioBox::RadioBox(
 	const QString &title,
 	const QString &description,
 	int currentValue,
-	const QMap<int, QString> &options,
+	int valueCount,
+	Fn<QString(int)> labelGetter,
 	Fn<void(int)> saveCallback,
 	bool warnRestart)
 : _title(title)
 , _description(description)
 , _startValue(currentValue)
-, _options(options)
+, _valueCount(valueCount)
+, _labelGetter(labelGetter)
 , _saveCallback(std::move(saveCallback))
 , _warnRestart(warnRestart) {
 }
@@ -69,13 +73,13 @@ void RadioBox::prepare() {
 
 	_group = std::make_shared<Ui::RadiobuttonGroup>(_startValue);
 
-	for (auto i = _options.constBegin(); i != _options.constEnd(); ++i) {
+	for (auto i = 0; i != _valueCount; ++i) {
 		content->add(
 			object_ptr<Ui::Radiobutton>(
 				this,
 				_group,
-				i.key(),
-				i.value(),
+				i,
+				_labelGetter(i),
 				st::autolockButton),
 			style::margins(
 				st::boxPadding.left(),
diff --git a/Telegram/SourceFiles/kotato/customboxes/radio_box.h b/Telegram/SourceFiles/kotato/customboxes/radio_box.h
index 50f7bdf57..680c2ca92 100644
--- a/Telegram/SourceFiles/kotato/customboxes/radio_box.h
+++ b/Telegram/SourceFiles/kotato/customboxes/radio_box.h
@@ -19,8 +19,8 @@ namespace Kotato {
 
 class RadioBox : public Ui::BoxContent {
 public:
-	RadioBox(QWidget* parent, const QString &title, int currentValue, const QMap<int, QString> &options, Fn<void(int)> saveCallback, bool warnRestart = false);
-	RadioBox(QWidget* parent, const QString &title, const QString &description, int currentValue, const QMap<int, QString> &options, Fn<void(int)> saveCallback, bool warnRestart = false);
+	RadioBox(QWidget* parent, const QString &title, int currentValue, int valueCount, Fn<QString(int)> labelGetter, Fn<void(int)> saveCallback, bool warnRestart = false);
+	RadioBox(QWidget* parent, const QString &title, const QString &description, int currentValue, int valueCount, Fn<QString(int)> labelGetter, Fn<void(int)> saveCallback, bool warnRestart = false);
 
 protected:
 	void prepare() override;
@@ -31,7 +31,8 @@ private:
 	QString _title;
 	QString _description;
 	int _startValue;
-	QMap<int, QString> _options;
+	int _valueCount;
+	Fn<QString(int)> _labelGetter;
 	Fn<void(int)> _saveCallback;
 	bool _warnRestart = false;
 	std::shared_ptr<Ui::RadiobuttonGroup> _group;
diff --git a/Telegram/SourceFiles/kotato/settings_menu.cpp b/Telegram/SourceFiles/kotato/settings_menu.cpp
index 939442948..3a97172b4 100644
--- a/Telegram/SourceFiles/kotato/settings_menu.cpp
+++ b/Telegram/SourceFiles/kotato/settings_menu.cpp
@@ -250,13 +250,6 @@ void SetupKotatoChats(
 		Ui::show(Box<FontsBox>());
 	});
 
-	const QMap<int, QString> userpicRoundOptions = {
-		{ 0, UserpicRoundingLabel(0) },
-		{ 1, UserpicRoundingLabel(1) },
-		{ 2, UserpicRoundingLabel(2) },
-		{ 3, UserpicRoundingLabel(3) }
-	};
-
 	AddButtonWithLabel(
 		container,
 		tr::ktg_settings_userpic_rounding(),
@@ -267,7 +260,8 @@ void SetupKotatoChats(
 			tr::ktg_settings_userpic_rounding(tr::now),
 			tr::ktg_settings_userpic_rounding_desc(tr::now),
 			cUserpicCornersType(),
-			userpicRoundOptions,
+			4,
+			UserpicRoundingLabel,
 			[=] (int value) {
 				cSetUserpicCornersType(value);
 				::Kotato::JsonSettings::Write();
@@ -389,13 +383,6 @@ void SetupKotatoNetwork(not_null<Ui::VerticalLayout*> container) {
 	AddSkip(container);
 	AddSubsectionTitle(container, tr::ktg_settings_network());
 
-	const QMap<int, QString> netBoostOptions = {
-		{ 0, NetBoostLabel(0) },
-		{ 1, NetBoostLabel(1) },
-		{ 2, NetBoostLabel(2) },
-		{ 3, NetBoostLabel(3) }
-	};
-
 	AddButtonWithLabel(
 		container,
 		tr::ktg_settings_net_speed_boost(),
@@ -406,7 +393,8 @@ void SetupKotatoNetwork(not_null<Ui::VerticalLayout*> container) {
 			tr::ktg_net_speed_boost_title(tr::now),
 			tr::ktg_net_speed_boost_desc(tr::now),
 			cNetSpeedBoost(),
-			netBoostOptions,
+			4,
+			NetBoostLabel,
 			[=] (int value) {
 				SetNetworkBoost(value);
 				::Kotato::JsonSettings::Write();
@@ -530,15 +518,6 @@ void SetupKotatoSystem(
 		}, container->lifetime());
 	}
 
-	const QMap<int, QString> trayIconOptions = {
-		{ 0, TrayIconLabel(0) },
-		{ 1, TrayIconLabel(1) },
-		{ 2, TrayIconLabel(2) },
-		{ 3, TrayIconLabel(3) },
-		{ 4, TrayIconLabel(4) },
-		{ 5, TrayIconLabel(5) },
-	};
-
 	auto trayIconText = rpl::single(
 		rpl::empty_value()
 	) | rpl::then(
@@ -557,7 +536,8 @@ void SetupKotatoSystem(
 			tr::ktg_settings_tray_icon(tr::now),
 			tr::ktg_settings_tray_icon_desc(tr::now),
 			cCustomAppIcon(),
-			trayIconOptions,
+			6,
+			TrayIconLabel,
 			[=] (int value) {
 				cSetCustomAppIcon(value);
 				controller->session().data().notifyUnreadBadgeChanged();
@@ -575,12 +555,6 @@ void SetupKotatoOther(not_null<Ui::VerticalLayout*> container) {
 
 	SettingsMenuCSwitch(ktg_settings_show_phone_number, ShowPhoneInDrawer);
 
-	const QMap<int, QString> chatIdOptions = {
-		{ 0, ChatIdLabel(0) },
-		{ 1, ChatIdLabel(1) },
-		{ 2, ChatIdLabel(2) },
-	};
-
 	const auto chatIdButton = container->add(
 		object_ptr<Button>(
 			container,
@@ -603,7 +577,8 @@ void SetupKotatoOther(not_null<Ui::VerticalLayout*> container) {
 			tr::ktg_settings_chat_id(tr::now),
 			tr::ktg_settings_chat_id_desc(tr::now),
 			cShowChatId(),
-			chatIdOptions,
+			3,
+			ChatIdLabel,
 			[=] (int value) {
 				cSetShowChatId(value);
 				::Kotato::JsonSettings::Write();

From ecb10dca8a32a79f00d1c357fc4993feb0b68d1a Mon Sep 17 00:00:00 2001
From: Ilya Fedin <fedin-ilja2010@ya.ru>
Date: Wed, 31 Mar 2021 12:34:17 +0400
Subject: [PATCH 3/3] Add option to choose file dialog

---
 Telegram/Resources/langs/lang.strings         |  3 +++
 Telegram/Resources/langs/rewrites/en.json     |  2 ++
 Telegram/Resources/langs/rewrites/ru.json     |  2 ++
 Telegram/SourceFiles/kotato/json_settings.cpp |  9 +++++++
 Telegram/SourceFiles/kotato/settings.cpp      |  1 +
 Telegram/SourceFiles/kotato/settings.h        |  3 +++
 Telegram/SourceFiles/kotato/settings_menu.cpp | 26 +++++++++++++++++++
 .../platform/linux/file_utilities_linux.cpp   | 13 ++++++++++
 .../platform/linux/file_utilities_linux.h     | 12 +++++++++
 .../platform/linux/linux_gtk_file_dialog.cpp  |  5 ++--
 .../platform/linux/linux_xdp_file_dialog.cpp  |  9 ++++---
 .../platform/mac/file_utilities_mac.h         |  9 +++++++
 .../platform/platform_file_utilities.h        |  4 +++
 .../platform/win/file_utilities_win.h         |  9 +++++++
 14 files changed, 101 insertions(+), 6 deletions(-)

diff --git a/Telegram/Resources/langs/lang.strings b/Telegram/Resources/langs/lang.strings
index f860ef842..2354b75ac 100644
--- a/Telegram/Resources/langs/lang.strings
+++ b/Telegram/Resources/langs/lang.strings
@@ -2754,6 +2754,9 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 "ktg_settings_system" = "System";
 "ktg_settings_gtk_integration" = "GTK integration";
 
+"ktg_settings_file_dialog_type" = "File dialog";
+"ktg_file_dialog_type_default" = "Default";
+
 "ktg_settings_other" = "Other";
 "ktg_profile_copy_id" = "Copy ID";
 "ktg_profile_bot_id" = "Bot ID";
diff --git a/Telegram/Resources/langs/rewrites/en.json b/Telegram/Resources/langs/rewrites/en.json
index ffe2cace7..31949541b 100644
--- a/Telegram/Resources/langs/rewrites/en.json
+++ b/Telegram/Resources/langs/rewrites/en.json
@@ -68,6 +68,8 @@
 	"ktg_net_speed_boost_big": "Big",
 	"ktg_settings_system": "System",
 	"ktg_settings_gtk_integration": "GTK integration",
+	"ktg_settings_file_dialog_type": "File dialog",
+	"ktg_file_dialog_type_default": "Default",
 	"ktg_settings_other": "Other",
 	"ktg_profile_copy_id": "Copy ID",
 	"ktg_profile_bot_id": "Bot ID",
diff --git a/Telegram/Resources/langs/rewrites/ru.json b/Telegram/Resources/langs/rewrites/ru.json
index 1316a57a3..84b41ef97 100644
--- a/Telegram/Resources/langs/rewrites/ru.json
+++ b/Telegram/Resources/langs/rewrites/ru.json
@@ -67,6 +67,8 @@
 	"ktg_net_speed_boost_big": "Высокое",
 	"ktg_settings_system": "Система",
 	"ktg_settings_gtk_integration": "GTK-интеграция",
+	"ktg_settings_file_dialog_type": "Файловый диалог",
+	"ktg_file_dialog_type_default": "По умолчанию",
 	"ktg_settings_other": "Прочие",
 	"ktg_profile_copy_id": "Копировать ID",
 	"ktg_profile_bot_id": "ID бота",
diff --git a/Telegram/SourceFiles/kotato/json_settings.cpp b/Telegram/SourceFiles/kotato/json_settings.cpp
index 82e784f58..403b46be9 100644
--- a/Telegram/SourceFiles/kotato/json_settings.cpp
+++ b/Telegram/SourceFiles/kotato/json_settings.cpp
@@ -370,6 +370,7 @@ QByteArray GenerateSettingsJson(bool areDefault = false) {
 	settings.insert(qsl("userpic_corner_type"), cUserpicCornersType());
 	settings.insert(qsl("always_show_top_userpic"), cShowTopBarUserpic());
 	settings.insert(qsl("gtk_integration"), cGtkIntegration());
+	settings.insert(qsl("file_dialog_type"), int(cFileDialogType()));
 	settings.insert(qsl("disable_tray_counter"), cDisableTrayCounter());
 	settings.insert(qsl("use_telegram_panel_icon"), cUseTelegramPanelIcon());
 	settings.insert(qsl("custom_app_icon"), cCustomAppIcon());
@@ -616,6 +617,14 @@ bool Manager::readCustomFile() {
 		cSetGtkIntegration(v);
 	});
 
+	ReadIntOption(settings, "file_dialog_type", [&](auto v) {
+		const auto typedValue = Platform::FileDialog::ImplementationType(v);
+		if (typedValue >= Platform::FileDialog::ImplementationType::Default
+			&& typedValue < Platform::FileDialog::ImplementationType::Count) {
+			cSetFileDialogType(typedValue);
+		}
+	});
+
 	ReadBoolOption(settings, "disable_tray_counter", [&](auto v) {
 		cSetDisableTrayCounter(v);
 	});
diff --git a/Telegram/SourceFiles/kotato/settings.cpp b/Telegram/SourceFiles/kotato/settings.cpp
index e624add1c..a730f71cd 100644
--- a/Telegram/SourceFiles/kotato/settings.cpp
+++ b/Telegram/SourceFiles/kotato/settings.cpp
@@ -148,6 +148,7 @@ rpl::producer<int> RecentStickersLimitChanges() {
 int gUserpicCornersType = 3;
 bool gShowTopBarUserpic = false;
 bool gGtkIntegration = false;
+Platform::FileDialog::ImplementationType gFileDialogType = Platform::FileDialog::ImplementationType::Default;
 bool gDisableTrayCounter = Platform::IsLinux();
 bool gUseTelegramPanelIcon = false;
 int gCustomAppIcon = 0;
diff --git a/Telegram/SourceFiles/kotato/settings.h b/Telegram/SourceFiles/kotato/settings.h
index 3fe662ab7..fe4e9a3da 100644
--- a/Telegram/SourceFiles/kotato/settings.h
+++ b/Telegram/SourceFiles/kotato/settings.h
@@ -7,6 +7,8 @@ https://github.com/kotatogram/kotatogram-desktop/blob/dev/LEGAL
 */
 #pragma once
 
+#include "platform/platform_file_utilities.h"
+
 #define DeclareReadSetting(Type, Name) extern Type g##Name; \
 inline const Type &c##Name() { \
 	return g##Name; \
@@ -102,6 +104,7 @@ void SetRecentStickersLimit(int limit);
 DeclareSetting(int, UserpicCornersType);
 DeclareSetting(bool, ShowTopBarUserpic);
 DeclareSetting(bool, GtkIntegration);
+DeclareSetting(Platform::FileDialog::ImplementationType, FileDialogType);
 DeclareSetting(bool, DisableTrayCounter);
 DeclareSetting(bool, UseTelegramPanelIcon);
 DeclareSetting(int, CustomAppIcon);
diff --git a/Telegram/SourceFiles/kotato/settings_menu.cpp b/Telegram/SourceFiles/kotato/settings_menu.cpp
index 3a97172b4..ed09bf8a8 100644
--- a/Telegram/SourceFiles/kotato/settings_menu.cpp
+++ b/Telegram/SourceFiles/kotato/settings_menu.cpp
@@ -41,6 +41,15 @@ namespace Settings {
 
 namespace {
 
+QString FileDialogTypeLabel(int value) {
+	const auto typedValue = Platform::FileDialog::ImplementationType(value);
+	switch (typedValue) {
+	case Platform::FileDialog::ImplementationType::Default:
+		return tr::ktg_file_dialog_type_default(tr::now);
+	}
+	return Platform::FileDialog::ImplementationTypeLabel(typedValue);
+}
+
 QString NetBoostLabel(int boost) {
 	switch (boost) {
 		case 0:
@@ -457,6 +466,23 @@ void SetupKotatoSystem(
 	}
 #endif // !DESKTOP_APP_DISABLE_GTK_INTEGRATION
 
+	AddButtonWithLabel(
+		container,
+		tr::ktg_settings_file_dialog_type(),
+		rpl::single(FileDialogTypeLabel(int(cFileDialogType()))),
+		st::settingsButton
+	)->addClickHandler([=] {
+		Ui::show(Box<::Kotato::RadioBox>(
+			tr::ktg_settings_file_dialog_type(tr::now),
+			int(cFileDialogType()),
+			int(Platform::FileDialog::ImplementationType::Count),
+			FileDialogTypeLabel,
+			[=](int value) {
+				cSetFileDialogType(Platform::FileDialog::ImplementationType(value));
+				::Kotato::JsonSettings::Write();
+			}, false));
+	});
+
 	if (Platform::IsMac()) {
 		const auto useNativeDecorationsToggled = Ui::CreateChild<rpl::event_stream<bool>>(
 			container.get());
diff --git a/Telegram/SourceFiles/platform/linux/file_utilities_linux.cpp b/Telegram/SourceFiles/platform/linux/file_utilities_linux.cpp
index 92dc89179..c5c4fc7db 100644
--- a/Telegram/SourceFiles/platform/linux/file_utilities_linux.cpp
+++ b/Telegram/SourceFiles/platform/linux/file_utilities_linux.cpp
@@ -159,6 +159,19 @@ bool GetQt(
 
 }
 
+QString ImplementationTypeLabel(ImplementationType value) {
+	switch (value) {
+#ifndef DESKTOP_APP_DISABLE_DBUS_INTEGRATION
+	case ImplementationType::XDP: return qsl("XDG Desktop Portal");
+#endif // !DESKTOP_APP_DISABLE_DBUS_INTEGRATION
+#ifndef DESKTOP_APP_DISABLE_GTK_INTEGRATION
+	case ImplementationType::GTK: return qsl("GTK");
+#endif // !DESKTOP_APP_DISABLE_GTK_INTEGRATION
+	case ImplementationType::Qt: return qsl("Qt");
+	}
+	Unexpected("Value in Platform::FileDialog::ImplementationTypeLabel.");
+}
+
 bool Get(
 		QPointer<QWidget> parent,
 		QStringList &files,
diff --git a/Telegram/SourceFiles/platform/linux/file_utilities_linux.h b/Telegram/SourceFiles/platform/linux/file_utilities_linux.h
index 00008a8ca..1cef5305c 100644
--- a/Telegram/SourceFiles/platform/linux/file_utilities_linux.h
+++ b/Telegram/SourceFiles/platform/linux/file_utilities_linux.h
@@ -27,6 +27,18 @@ inline void PostprocessDownloaded(const QString &filepath) {
 
 namespace FileDialog {
 
+enum class ImplementationType {
+	Default,
+#ifndef DESKTOP_APP_DISABLE_DBUS_INTEGRATION
+	XDP,
+#endif // !DESKTOP_APP_DISABLE_DBUS_INTEGRATION
+#ifndef DESKTOP_APP_DISABLE_GTK_INTEGRATION
+	GTK,
+#endif // !DESKTOP_APP_DISABLE_GTK_INTEGRATION
+	Qt,
+	Count,
+};
+
 inline void InitLastPath() {
 	::FileDialog::internal::InitLastPathDefault();
 }
diff --git a/Telegram/SourceFiles/platform/linux/linux_gtk_file_dialog.cpp b/Telegram/SourceFiles/platform/linux/linux_gtk_file_dialog.cpp
index 9befbf897..5bdfd2f87 100644
--- a/Telegram/SourceFiles/platform/linux/linux_gtk_file_dialog.cpp
+++ b/Telegram/SourceFiles/platform/linux/linux_gtk_file_dialog.cpp
@@ -642,11 +642,12 @@ void GtkFileDialog::setNameFilters(const QStringList &filters) {
 } // namespace
 
 bool Use(Type type) {
-	if (!Supported()) {
+	if (!Supported()
+		|| (cFileDialogType() > ImplementationType::GTK)) {
 		return false;
 	}
 
-	return qEnvironmentVariableIsSet("TDESKTOP_USE_GTK_FILE_DIALOG")
+	return (cFileDialogType() == ImplementationType::GTK)
 		|| DesktopEnvironment::IsGtkBased();
 }
 
diff --git a/Telegram/SourceFiles/platform/linux/linux_xdp_file_dialog.cpp b/Telegram/SourceFiles/platform/linux/linux_xdp_file_dialog.cpp
index ecbe52ed5..0495f17f5 100644
--- a/Telegram/SourceFiles/platform/linux/linux_xdp_file_dialog.cpp
+++ b/Telegram/SourceFiles/platform/linux/linux_xdp_file_dialog.cpp
@@ -642,17 +642,18 @@ rpl::producer<> XDPFileDialog::rejected() {
 } // namespace
 
 bool Use(Type type) {
-	static const auto ShouldUse = [&] {
-		const auto envVar = qEnvironmentVariableIsSet("TDESKTOP_USE_PORTAL");
+	const auto shouldUse = [&] {
+		const auto setting = cFileDialogType() <= ImplementationType::XDP;
+		const auto forceSetting = cFileDialogType() == ImplementationType::XDP;
 		const auto confined = InFlatpak() || InSnap();
 		const auto notGtkBased = !DesktopEnvironment::IsGtkBased();
 
-		return confined || notGtkBased || envVar;
+		return setting && (confined || notGtkBased || forceSetting);
 	}();
 
 	static const auto Version = FileChooserPortalVersion();
 
-	return ShouldUse
+	return shouldUse
 		&& Version.has_value()
 		&& (type != Type::ReadFolder || *Version >= 3);
 }
diff --git a/Telegram/SourceFiles/platform/mac/file_utilities_mac.h b/Telegram/SourceFiles/platform/mac/file_utilities_mac.h
index aacb80c4c..8a6b93b44 100644
--- a/Telegram/SourceFiles/platform/mac/file_utilities_mac.h
+++ b/Telegram/SourceFiles/platform/mac/file_utilities_mac.h
@@ -27,6 +27,15 @@ inline void PostprocessDownloaded(const QString &filepath) {
 
 namespace FileDialog {
 
+enum class ImplementationType {
+	Default,
+	Count,
+};
+
+inline QString ImplementationTypeLabel(ImplementationType value) {
+	Unexpected("Value in Platform::FileDialog::TypeLabel.");
+}
+
 inline void InitLastPath() {
 	::FileDialog::internal::InitLastPathDefault();
 }
diff --git a/Telegram/SourceFiles/platform/platform_file_utilities.h b/Telegram/SourceFiles/platform/platform_file_utilities.h
index ad229d244..fc6730ee1 100644
--- a/Telegram/SourceFiles/platform/platform_file_utilities.h
+++ b/Telegram/SourceFiles/platform/platform_file_utilities.h
@@ -27,6 +27,10 @@ void PostprocessDownloaded(const QString &filepath);
 
 namespace FileDialog {
 
+enum class ImplementationType;
+
+QString ImplementationTypeLabel(ImplementationType value);
+
 void InitLastPath();
 
 bool Get(
diff --git a/Telegram/SourceFiles/platform/win/file_utilities_win.h b/Telegram/SourceFiles/platform/win/file_utilities_win.h
index 4a5b07f66..43e23a955 100644
--- a/Telegram/SourceFiles/platform/win/file_utilities_win.h
+++ b/Telegram/SourceFiles/platform/win/file_utilities_win.h
@@ -12,6 +12,15 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 namespace Platform {
 namespace File {
 
+enum class ImplementationType {
+	Default,
+	Count,
+};
+
+inline QString ImplementationTypeLabel(ImplementationType value) {
+	Unexpected("Value in Platform::FileDialog::TypeLabel.");
+}
+
 inline QString UrlToLocal(const QUrl &url) {
 	return ::File::internal::UrlToLocalDefault(url);
 }