Merge tag 'v5.1.2' into dev

# Conflicts:
#	Telegram/Resources/winrc/Telegram.rc
#	Telegram/Resources/winrc/Updater.rc
#	Telegram/SourceFiles/boxes/send_files_box.cpp
#	Telegram/SourceFiles/core/version.h
#	Telegram/SourceFiles/data/data_search_controller.cpp
#	Telegram/SourceFiles/dialogs/dialogs_widget.cpp
#	Telegram/SourceFiles/dialogs/dialogs_widget.h
#	Telegram/SourceFiles/history/view/media/history_view_gif.cpp
#	Telegram/SourceFiles/mainwidget.cpp
#	Telegram/lib_ui

Telegram/SourceFiles/window/window_session_controller.cpp

@@ -13,6 +13,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "boxes/peers/edit_peer_info_box.h"
 #include "boxes/peers/replace_boost_box.h"
 #include "boxes/delete_messages_box.h"
+#include "window/window_chat_preview.h"
 #include "window/window_controller.h"
 #include "window/window_filters_menu.h"
 #include "info/channel_statistics/earn/info_earn_inner_widget.h"
@@ -22,7 +23,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "history/history.h"
 #include "history/history_item.h"
 #include "history/view/reactions/history_view_reactions.h"
-#include "history/view/reactions/history_view_reactions_button.h"
+//#include "history/view/reactions/history_view_reactions_button.h"
 #include "history/view/history_view_replies_section.h"
 #include "history/view/history_view_scheduled_section.h"
 #include "media/player/media_player_instance.h"
@@ -58,6 +59,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "ui/text/format_values.h" // Ui::FormatPhone.
 #include "ui/delayed_activation.h"
 #include "ui/boxes/boost_box.h"
+#include "ui/chat/chat_style.h"
 #include "ui/chat/chat_theme.h"
 #include "ui/effects/message_sending_animation_controller.h"
 #include "ui/style/style_palette_colorizer.h"
@@ -125,7 +127,7 @@ public:
 	rpl::producer<> pauseChanged() const override;
 
 	rpl::producer<bool> adjustShadowLeft() const override;
-	SendMenu::Type sendMenuType() const override;
+	SendMenu::Details sendMenuDetails() const override;
 
 	bool showMediaPreview(
 		Data::FileOrigin origin,
@@ -275,12 +277,12 @@ rpl::producer<bool> MainWindowShow::adjustShadowLeft() const {
 	});
 }
 
-SendMenu::Type MainWindowShow::sendMenuType() const {
+SendMenu::Details MainWindowShow::sendMenuDetails() const {
 	const auto window = _window.get();
 	if (!window) {
-		return SendMenu::Type::Disabled;
+		return SendMenu::Details();
 	}
-	return window->content()->sendMenuType();
+	return window->content()->sendMenuDetails();
 }
 
 bool MainWindowShow::showMediaPreview(
@@ -1182,6 +1184,7 @@ SessionController::SessionController(
 , _window(window)
 , _emojiInteractions(
 	std::make_unique<ChatHelpers::EmojiInteractions>(session))
+, _chatPreviewManager(std::make_unique<ChatPreviewManager>(this))
 , _isPrimary(window->isPrimary())
 , _sendingAnimation(
 	std::make_unique<Ui::MessageSendingAnimationController>(this))
@@ -1194,7 +1197,6 @@ SessionController::SessionController(
 , _activeChatsFilter(session->data().chatsFilters().defaultId())
 , _defaultChatTheme(std::make_shared<Ui::ChatTheme>())
 , _chatStyle(std::make_unique<Ui::ChatStyle>(session->colorIndicesValue()))
-, _cachedReactionIconFactory(std::make_unique<ReactionIconFactory>())
 , _giftPremiumValidator(this) {
 	init();
 
@@ -2959,7 +2961,7 @@ void SessionController::openPeerStories(
 }
 
 HistoryView::PaintContext SessionController::preparePaintContext(
-		PaintContextArgs &&args) {
+		Ui::ChatPaintContextArgs &&args) {
 	const auto visibleAreaTopLocal = content()->mapFromGlobal(
 		args.visibleAreaPositionGlobal).y();
 	const auto viewport = QRect(
@@ -2982,6 +2984,34 @@ QString SessionController::premiumRef() const {
 	return _premiumRef;
 }
 
+bool SessionController::showChatPreview(
+		Dialogs::RowDescriptor row,
+		Fn<void(bool shown)> callback,
+		QPointer<QWidget> parentOverride,
+		std::optional<QPoint> positionOverride) {
+	return _chatPreviewManager->show(
+		std::move(row),
+		std::move(callback),
+		std::move(parentOverride),
+		positionOverride);
+}
+
+bool SessionController::scheduleChatPreview(
+		Dialogs::RowDescriptor row,
+		Fn<void(bool shown)> callback,
+	QPointer<QWidget> parentOverride,
+	std::optional<QPoint> positionOverride) {
+	return _chatPreviewManager->schedule(
+		std::move(row),
+		std::move(callback),
+		std::move(parentOverride),
+		positionOverride);
+}
+
+void SessionController::cancelScheduledPreview() {
+	_chatPreviewManager->cancelScheduled();
+}
+
 bool SessionController::contentOverlapped(QWidget *w, QPaintEvent *e) const {
 	return widget()->contentOverlapped(w, e);
 }