Add pending requests bar in the chat.

Telegram/CMakeLists.txt

@@ -621,8 +621,8 @@ PRIVATE
     history/view/history_view_emoji_interactions.h
     history/view/history_view_empty_list_bubble.cpp
     history/view/history_view_empty_list_bubble.h
-    history/view/history_view_group_call_tracker.cpp
-    history/view/history_view_group_call_tracker.h
+    history/view/history_view_group_call_bar.cpp
+    history/view/history_view_group_call_bar.h
     history/view/history_view_list_widget.cpp
     history/view/history_view_list_widget.h
     history/view/history_view_message.cpp
@@ -636,6 +636,8 @@ PRIVATE
     history/view/history_view_pinned_tracker.h
     history/view/history_view_replies_section.cpp
     history/view/history_view_replies_section.h
+    history/view/history_view_requests_bar.cpp
+    history/view/history_view_requests_bar.h
     history/view/history_view_schedule_box.cpp
     history/view/history_view_schedule_box.h
     history/view/history_view_scheduled_section.cpp

Telegram/Resources/langs/lang.strings

@@ -1350,8 +1350,8 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 "lng_group_requests_dismiss" = "Dismiss";
 "lng_group_requests_was_added" = "{user} has been added to the group.";
 "lng_group_requests_was_added_channel" = "{user} has been added to the channel.";
-"lng_group_requests_none" = "No member requests";
-"lng_group_requests_none_channel" = "No subscriber requests";
+"lng_group_requests_none" = "You have no pending requests\nto join your group.";
+"lng_group_requests_none_channel" = "You have no pending requests\nto join your channel.";
 
 "lng_channel_public_link_copied" = "Link copied to clipboard.";
 "lng_context_about_private_link" = "This link will only work for members of this chat.";

Telegram/SourceFiles/boxes/peers/edit_peer_info_box.cpp

@@ -1108,23 +1108,13 @@ void Controller::fillPendingRequestsButton() {
 			_controls.buttonsLayout,
 			object_ptr<Ui::VerticalLayout>(
 				_controls.buttonsLayout)));
-	const auto showPendingRequestsBox = [=] {
-		auto controller = std::make_unique<RequestsBoxController>(
-			_navigation,
-			_peer->migrateToOrMe());
-		const auto initBox = [=](not_null<PeerListBox*> box) {
-			box->addButton(tr::lng_close(), [=] { box->closeBox(); });
-		};
-		_navigation->parentController()->show(
-			Box<PeerListBox>(std::move(controller), initBox));
-	};
 	AddButtonWithCount(
 		wrap->entity(),
 		(_isGroup
 			? tr::lng_manage_peer_requests()
 			: tr::lng_manage_peer_requests_channel()),
 		rpl::duplicate(pendingRequestsCount) | ToPositiveNumberString(),
-		showPendingRequestsBox,
+		[=] { RequestsBoxController::Start(_navigation, _peer); },
 		st::infoIconRequests);
 	std::move(
 		pendingRequestsCount

Telegram/SourceFiles/boxes/peers/edit_peer_invite_link.cpp

@@ -28,7 +28,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "ui/text/text_utilities.h"
 #include "ui/boxes/edit_invite_link.h"
 #include "boxes/share_box.h"
-#include "history/view/history_view_group_call_tracker.h" // GenerateUs...
+#include "history/view/history_view_group_call_bar.h" // GenerateUserpics...
 #include "history/history_message.h" // GetErrorTextForSending.
 #include "history/history.h"
 #include "ui/boxes/confirm_box.h"

Telegram/SourceFiles/boxes/peers/edit_peer_requests_box.cpp

@@ -256,6 +256,19 @@ RequestsBoxController::RequestsBoxController(
 
 RequestsBoxController::~RequestsBoxController() = default;
 
+void RequestsBoxController::Start(
+		not_null<Window::SessionNavigation*> navigation,
+		not_null<PeerData*> peer) {
+	auto controller = std::make_unique<RequestsBoxController>(
+		navigation,
+		peer->migrateToOrMe());
+	const auto initBox = [=](not_null<PeerListBox*> box) {
+		box->addButton(tr::lng_close(), [=] { box->closeBox(); });
+	};
+	navigation->parentController()->show(
+		Box<PeerListBox>(std::move(controller), initBox));
+}
+
 Main::Session &RequestsBoxController::session() const {
 	return _peer->session();
 }

Telegram/SourceFiles/boxes/peers/edit_peer_requests_box.h

@@ -27,6 +27,10 @@ public:
 		not_null<PeerData*> peer);
 	~RequestsBoxController();
 
+	static void Start(
+		not_null<Window::SessionNavigation*> navigation,
+		not_null<PeerData*> peer);
+
 	Main::Session &session() const override;
 	void prepare() override;
 	void rowClicked(not_null<PeerListRow*> row) override;

Telegram/SourceFiles/calls/calls_top_bar.cpp

@@ -24,7 +24,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "calls/calls_signal_bars.h"
 #include "calls/group/calls_group_call.h"
 #include "calls/group/calls_group_menu.h" // Group::LeaveBox.
-#include "history/view/history_view_group_call_tracker.h" // ContentByCall.
+#include "history/view/history_view_group_call_bar.h" // ContentByCall.
 #include "data/data_user.h"
 #include "data/data_group_call.h"
 #include "data/data_peer.h"
@@ -582,7 +582,7 @@ void TopBar::subscribeToMembersChanges(not_null<GroupCall*> call) {
 		}, lifetime());
 	}) | rpl::map([=](not_null<Data::GroupCall*> real) {
 
-		return HistoryView::GroupCallTracker::ContentByCall(
+		return HistoryView::GroupCallBarContentByCall(
 			real,
 			st::groupCallTopBarUserpics.size);
 	}) | rpl::flatten_latest(

Telegram/SourceFiles/history/history_widget.cpp

@@ -18,6 +18,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "boxes/share_box.h"
 #include "boxes/edit_caption_box.h"
 #include "boxes/peers/edit_peer_permissions_box.h" // ShowAboutGigagroup.
+#include "boxes/peers/edit_peer_requests_box.h"
 #include "core/file_utilities.h"
 #include "ui/toast/toast.h"
 #include "ui/toasts/common_toasts.h"
@@ -81,7 +82,8 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "history/view/history_view_pinned_tracker.h"
 #include "history/view/history_view_pinned_section.h"
 #include "history/view/history_view_pinned_bar.h"
-#include "history/view/history_view_group_call_tracker.h"
+#include "history/view/history_view_group_call_bar.h"
+#include "history/view/history_view_requests_bar.h"
 #include "history/view/media/history_view_media.h"
 #include "profile/profile_block_group_members.h"
 #include "info/info_memento.h"
@@ -109,6 +111,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "ui/boxes/report_box.h"
 #include "ui/chat/pinned_bar.h"
 #include "ui/chat/group_call_bar.h"
+#include "ui/chat/requests_bar.h"
 #include "ui/chat/chat_theme.h"
 #include "ui/chat/chat_style.h"
 #include "ui/chat/continuous_scroll.h"
@@ -1416,6 +1419,9 @@ void HistoryWidget::orderWidgets() {
 	if (_groupCallBar) {
 		_groupCallBar->raise();
 	}
+	if (_requestsBar) {
+		_requestsBar->raise();
+	}
 	if (_chooseTheme) {
 		_chooseTheme->raise();
 	}
@@ -2007,7 +2013,7 @@ void HistoryWidget::showHistory(
 		_pinnedBar = nullptr;
 		_pinnedTracker = nullptr;
 		_groupCallBar = nullptr;
-		_groupCallTracker = nullptr;
+		_requestsBar = nullptr;
 		_chooseTheme = nullptr;
 		_membersDropdown.destroy();
 		_scrollToAnimation.stop();
@@ -2134,7 +2140,8 @@ void HistoryWidget::showHistory(
 		_updateHistoryItems.cancel();
 
 		setupPinnedTracker();
-		setupGroupCallTracker();
+		setupGroupCallBar();
+		setupRequestsBar();
 		checkMessagesTTL();
 		if (_history->scrollTopItem
 			|| (_migrated && _migrated->scrollTopItem)
@@ -2404,6 +2411,9 @@ void HistoryWidget::updateControlsVisibility() {
 	if (_groupCallBar) {
 		_groupCallBar->show();
 	}
+	if (_requestsBar) {
+		_requestsBar->show();
+	}
 	if (_firstLoadRequest && !_scroll->isHidden()) {
 		_scroll->hide();
 	} else if (!_firstLoadRequest && _scroll->isHidden()) {
@@ -3377,6 +3387,9 @@ void HistoryWidget::hideChildWidgets() {
 	if (_groupCallBar) {
 		_groupCallBar->hide();
 	}
+	if (_requestsBar) {
+		_requestsBar->hide();
+	}
 	if (_voiceRecordBar) {
 		_voiceRecordBar->hideFast();
 	}
@@ -3617,6 +3630,9 @@ void HistoryWidget::showAnimated(
 	if (_groupCallBar) {
 		_groupCallBar->finishAnimating();
 	}
+	if (_requestsBar) {
+		_requestsBar->finishAnimating();
+	}
 	_topShadow->setVisible(params.withTopBarShadow ? false : true);
 	_preserveScrollTop = false;
 
@@ -3648,6 +3664,9 @@ void HistoryWidget::animationCallback() {
 		if (_groupCallBar) {
 			_groupCallBar->finishAnimating();
 		}
+		if (_requestsBar) {
+			_requestsBar->finishAnimating();
+		}
 		_cacheUnder = _cacheOver = QPixmap();
 		doneShow();
 		synteticScrollToY(_scroll->scrollTop());
@@ -3674,6 +3693,9 @@ void HistoryWidget::doneShow() {
 	if (_groupCallBar) {
 		_groupCallBar->finishAnimating();
 	}
+	if (_requestsBar) {
+		_requestsBar->finishAnimating();
+	}
 	checkHistoryActivation();
 	controller()->widget()->setInnerFocus();
 	_preserveScrollTop = false;
@@ -4815,7 +4837,12 @@ void HistoryWidget::updateControlsGeometry() {
 		_groupCallBar->move(0, groupCallTop);
 		_groupCallBar->resizeToWidth(width());
 	}
-	const auto pinnedBarTop = groupCallTop + (_groupCallBar ? _groupCallBar->height() : 0);
+	const auto requestsTop = groupCallTop + (_groupCallBar ? _groupCallBar->height() : 0);
+	if (_requestsBar) {
+		_requestsBar->move(0, requestsTop);
+		_requestsBar->resizeToWidth(width());
+	}
+	const auto pinnedBarTop = requestsTop + (_requestsBar ? _requestsBar->height() : 0);
 	if (_pinnedBar) {
 		_pinnedBar->move(0, pinnedBarTop);
 		_pinnedBar->resizeToWidth(width());
@@ -5000,6 +5027,9 @@ void HistoryWidget::updateHistoryGeometry(
 	if (_groupCallBar) {
 		newScrollHeight -= _groupCallBar->height();
 	}
+	if (_requestsBar) {
+		newScrollHeight -= _requestsBar->height();
+	}
 	if (_contactStatus) {
 		newScrollHeight -= _contactStatus->height();
 	}
@@ -5340,6 +5370,7 @@ int HistoryWidget::computeMaxFieldHeight() const {
 		- (_contactStatus ? _contactStatus->height() : 0)
 		- (_pinnedBar ? _pinnedBar->height() : 0)
 		- (_groupCallBar ? _groupCallBar->height() : 0)
+		- (_requestsBar ? _requestsBar->height() : 0)
 		- ((_editMsgId
 			|| replyToId()
 			|| readyToForward()
@@ -5611,7 +5642,8 @@ void HistoryWidget::handlePeerMigration() {
 		_migrated = _history->migrateFrom();
 		_list->notifyMigrateUpdated();
 		setupPinnedTracker();
-		setupGroupCallTracker();
+		setupGroupCallBar();
+		setupRequestsBar();
 		updateHistoryGeometry();
 	}
 	const auto from = chat->owner().historyLoaded(chat);
@@ -5979,20 +6011,19 @@ void HistoryWidget::refreshPinnedBarButton(bool many) {
 	_pinnedBar->setRightButton(std::move(button));
 }
 
-void HistoryWidget::setupGroupCallTracker() {
+void HistoryWidget::setupGroupCallBar() {
 	Expects(_history != nullptr);
 
 	const auto peer = _history->peer;
 	if (!peer->isChannel() && !peer->isChat()) {
-		_groupCallTracker = nullptr;
 		_groupCallBar = nullptr;
 		return;
 	}
-	_groupCallTracker = std::make_unique<HistoryView::GroupCallTracker>(
-		peer);
 	_groupCallBar = std::make_unique<Ui::GroupCallBar>(
 		this,
-		_groupCallTracker->content(),
+		HistoryView::GroupCallBarContentByPeer(
+			peer,
+			st::historyGroupCallUserpics.size),
 		Core::App().appDeactivatedValue());
 
 	controller()->adaptive().oneColumnValue(
@@ -6032,6 +6063,52 @@ void HistoryWidget::setupGroupCallTracker() {
 	}
 }
 
+void HistoryWidget::setupRequestsBar() {
+	Expects(_history != nullptr);
+
+	const auto peer = _history->peer;
+	if (!peer->isChannel() && !peer->isChat()) {
+		_requestsBar = nullptr;
+		return;
+	}
+	_requestsBar = std::make_unique<Ui::RequestsBar>(
+		this,
+		HistoryView::RequestsBarContentByPeer(
+			peer,
+			st::historyRequestsUserpics.size));
+
+	controller()->adaptive().oneColumnValue(
+	) | rpl::start_with_next([=](bool one) {
+		_requestsBar->setShadowGeometryPostprocess([=](QRect geometry) {
+			if (!one) {
+				geometry.setLeft(geometry.left() + st::lineWidth);
+			}
+			return geometry;
+		});
+	}, _requestsBar->lifetime());
+
+	_requestsBar->barClicks(
+	) | rpl::start_with_next([=] {
+		RequestsBoxController::Start(controller(), _peer);
+	}, _requestsBar->lifetime());
+
+	_requestsBarHeight = 0;
+	_requestsBar->heightValue(
+	) | rpl::start_with_next([=](int height) {
+		_topDelta = _preserveScrollTop ? 0 : (height - _requestsBarHeight);
+		_requestsBarHeight = height;
+		updateHistoryGeometry();
+		updateControlsGeometry();
+		_topDelta = 0;
+	}, _requestsBar->lifetime());
+
+	orderWidgets();
+
+	if (_a_show.animating()) {
+		_requestsBar->hide();
+	}
+}
+
 void HistoryWidget::requestMessageData(MsgId msgId) {
 	const auto callback = [=](ChannelData *channel, MsgId msgId) {
 		messageDataReceived(channel, msgId);

Telegram/SourceFiles/history/history_widget.h

@@ -73,6 +73,7 @@ class LinkButton;
 class RoundButton;
 class PinnedBar;
 class GroupCallBar;
+class RequestsBar;
 struct PreparedList;
 class SendFilesWay;
 enum class ReportReason;
@@ -102,7 +103,6 @@ class TopBarWidget;
 class ContactStatus;
 class Element;
 class PinnedTracker;
-class GroupCallTracker;
 namespace Controls {
 class RecordLock;
 class VoiceRecordBar;
@@ -507,7 +507,8 @@ private:
 		int nowScrollTop);
 
 	void checkMessagesTTL();
-	void setupGroupCallTracker();
+	void setupGroupCallBar();
+	void setupRequestsBar();
 
 	void sendInlineResult(InlineBots::ResultSelected result);
 
@@ -638,9 +639,10 @@ private:
 	FullMsgId _pinnedClickedId;
 	std::optional<FullMsgId> _minPinnedId;
 
-	std::unique_ptr<HistoryView::GroupCallTracker> _groupCallTracker;
 	std::unique_ptr<Ui::GroupCallBar> _groupCallBar;
 	int _groupCallBarHeight = 0;
+	std::unique_ptr<Ui::RequestsBar> _requestsBar;
+	int _requestsBarHeight = 0;
 
 	bool _preserveScrollTop = false;
 

Telegram/SourceFiles/history/view/history_view_group_call_bar.cpp

@@ -5,7 +5,7 @@ the official desktop application for the Telegram messaging service.
 For license and copyright information please follow this link:
 https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 */
-#include "history/view/history_view_group_call_tracker.h"
+#include "history/view/history_view_group_call_bar.h"
 
 #include "data/data_channel.h"
 #include "data/data_user.h"
@@ -62,11 +62,7 @@ void GenerateUserpicsInRow(
 	}
 }
 
-GroupCallTracker::GroupCallTracker(not_null<PeerData*> peer)
-: _peer(peer) {
-}
-
-rpl::producer<Ui::GroupCallBarContent> GroupCallTracker::ContentByCall(
+rpl::producer<Ui::GroupCallBarContent> GroupCallBarContentByCall(
 		not_null<Data::GroupCall*> call,
 		int userpicSize) {
 	struct State {
@@ -74,7 +70,7 @@ rpl::producer<Ui::GroupCallBarContent> GroupCallTracker::ContentByCall(
 		Ui::GroupCallBarContent current;
 		base::has_weak_ptr guard;
 		bool someUserpicsNotLoaded = false;
-		bool scheduled = false;
+		bool pushScheduled = false;
 	};
 
 	// speaking DESC, std::max(date, lastActive) DESC
@@ -251,12 +247,12 @@ rpl::producer<Ui::GroupCallBarContent> GroupCallTracker::ContentByCall(
 		state->current.livestream = call->peer()->isBroadcast();
 
 		const auto pushNext = [=] {
-			if (state->scheduled) {
+			if (state->pushScheduled) {
 				return;
 			}
-			state->scheduled = true;
+			state->pushScheduled = true;
 			crl::on_main(&state->guard, [=] {
-				state->scheduled = false;
+				state->pushScheduled = false;
 				consumer.put_next_copy(state->current);
 			});
 		};
@@ -350,8 +346,9 @@ rpl::producer<Ui::GroupCallBarContent> GroupCallTracker::ContentByCall(
 	};
 }
 
-rpl::producer<Ui::GroupCallBarContent> GroupCallTracker::content() const {
-	const auto peer = _peer;
+rpl::producer<Ui::GroupCallBarContent> GroupCallBarContentByPeer(
+		not_null<PeerData*> peer,
+		int userpicSize) {
 	return rpl::combine(
 		peer->session().changes().peerFlagsValue(
 			peer,
@@ -363,19 +360,15 @@ rpl::producer<Ui::GroupCallBarContent> GroupCallTracker::content() const {
 			? call
 			: nullptr;
 	}) | rpl::distinct_until_changed(
-	) | rpl::map([](Data::GroupCall *call)
+	) | rpl::map([=](Data::GroupCall *call)
 	-> rpl::producer<Ui::GroupCallBarContent> {
 		if (!call) {
 			return rpl::single(Ui::GroupCallBarContent{ .shown = false });
 		} else if (!call->fullCount() && !call->participantsLoaded()) {
 			call->reload();
 		}
-		return ContentByCall(call, st::historyGroupCallUserpics.size);
+		return GroupCallBarContentByCall(call, userpicSize);
 	}) | rpl::flatten_latest();
 }
 
-rpl::producer<> GroupCallTracker::joinClicks() const {
-	return _joinClicks.events();
-}
-
 } // namespace HistoryView

Telegram/SourceFiles/history/view/history_view_group_call_bar.h

@@ -37,22 +37,14 @@ void GenerateUserpicsInRow(
 	const style::GroupCallUserpics &st,
 	int maxElements = 0);
 
-class GroupCallTracker final {
-public:
-	explicit GroupCallTracker(not_null<PeerData*> peer);
-
-	[[nodiscard]] rpl::producer<Ui::GroupCallBarContent> content() const;
-	[[nodiscard]] rpl::producer<> joinClicks() const;
-
-	[[nodiscard]] static rpl::producer<Ui::GroupCallBarContent> ContentByCall(
+[[nodiscard]] auto GroupCallBarContentByCall(
 	not_null<Data::GroupCall*> call,
-		int userpicSize);
+	int userpicSize)
+-> rpl::producer<Ui::GroupCallBarContent>;
 
-private:
-	const not_null<PeerData*> _peer;
-
-	rpl::event_stream<> _joinClicks;
-
-};
+[[nodiscard]] auto GroupCallBarContentByPeer(
+	not_null<PeerData*> peer,
+	int userpicSize)
+-> rpl::producer<Ui::GroupCallBarContent>;
 
 } // namespace HistoryView

Telegram/SourceFiles/history/view/history_view_message.cpp

@@ -13,7 +13,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "history/history_message.h"
 #include "history/view/media/history_view_media.h"
 #include "history/view/media/history_view_web_page.h"
-#include "history/view/history_view_group_call_tracker.h" // UserpicInRow.
+#include "history/view/history_view_group_call_bar.h" // UserpicInRow.
 #include "history/view/history_view_view_button.h" // ViewButton.
 #include "history/history.h"
 #include "ui/effects/ripple_animation.h"

Telegram/SourceFiles/history/view/history_view_requests_bar.cpp

@@ -0,0 +1,214 @@
+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#include "history/view/history_view_requests_bar.h"
+
+#include "history/view/history_view_group_call_bar.h"
+#include "data/data_peer.h"
+#include "data/data_user.h"
+#include "data/data_changes.h"
+#include "data/data_session.h"
+#include "main/main_session.h"
+#include "ui/chat/requests_bar.h"
+#include "ui/chat/group_call_userpics.h"
+#include "info/profile/info_profile_values.h"
+#include "apiwrap.h"
+
+namespace HistoryView {
+namespace {
+
+// If less than 10 requests we request userpics each time the count changes.
+constexpr auto kRequestAgainThreshold = 10;
+
+} // namespace
+
+rpl::producer<Ui::RequestsBarContent> RequestsBarContentByPeer(
+		not_null<PeerData*> peer,
+		int userpicSize) {
+	struct State {
+		explicit State(not_null<PeerData*> peer)
+		: api(&peer->session().api()) {
+			current.isGroup = !peer->isBroadcast();
+		}
+		~State() {
+			if (requestId) {
+				api->request(requestId).cancel();
+			}
+		}
+
+		not_null<ApiWrap*> api;
+		std::vector<UserpicInRow> userpics;
+		std::vector<not_null<UserData*>> users;
+		Ui::RequestsBarContent current;
+		base::has_weak_ptr guard;
+		mtpRequestId requestId = 0;
+		Fn<void()> requestUsers;
+		bool someUserpicsNotLoaded = false;
+		bool pushScheduled = false;
+	};
+
+	static constexpr auto kLimit = 3;
+	static const auto FillUserpics = [](
+			not_null<State*> state) {
+		const auto &users = state->users;
+		const auto same = ranges::equal(
+			state->userpics,
+			users,
+			ranges::equal_to(),
+			&UserpicInRow::peer);
+		if (same) {
+			return false;
+		}
+		for (auto b = begin(users), e = end(users), i = b; i != e; ++i) {
+			const auto user = *i;
+			const auto j = ranges::find(
+				state->userpics,
+				user,
+				&UserpicInRow::peer);
+			const auto place = begin(state->userpics) + (i - b);
+			if (j == end(state->userpics)) {
+				state->userpics.insert(
+					place,
+					UserpicInRow{ .peer = user });
+			} else if (j > place) {
+				ranges::rotate(place, j, j + 1);
+			}
+		}
+		while (state->userpics.size() > users.size()) {
+			state->userpics.pop_back();
+		}
+		return true;
+	};
+
+	static const auto RegenerateUserpics = [](
+			not_null<State*> state,
+			int userpicSize,
+			bool force = false) {
+		const auto result = FillUserpics(state) || force;
+		if (!result) {
+			return false;
+		}
+		state->current.users.reserve(state->userpics.size());
+		state->current.users.clear();
+		state->someUserpicsNotLoaded = false;
+		for (auto &userpic : state->userpics) {
+			userpic.peer->loadUserpic();
+			const auto pic = userpic.peer->genUserpic(
+				userpic.view,
+				userpicSize);
+			userpic.uniqueKey = userpic.peer->userpicUniqueKey(userpic.view);
+			state->current.users.push_back({
+				.userpic = pic.toImage(),
+				.userpicKey = userpic.uniqueKey,
+				.id = userpic.peer->id.value,
+			});
+			if (userpic.peer->hasUserpic()
+				&& userpic.peer->useEmptyUserpic(userpic.view)) {
+				state->someUserpicsNotLoaded = true;
+			}
+		}
+		return true;
+	};
+
+	return [=](auto consumer) {
+		const auto api = &peer->session().api();
+
+		auto lifetime = rpl::lifetime();
+		auto state = lifetime.make_state<State>(peer);
+
+		const auto pushNext = [=] {
+			if (state->pushScheduled) {
+				return;
+			}
+			state->pushScheduled = true;
+			crl::on_main(&state->guard, [=] {
+				state->pushScheduled = false;
+				consumer.put_next_copy(state->current);
+			});
+		};
+
+		state->requestUsers = [=] {
+			if (state->requestId) {
+				return;
+			}
+			using Flag = MTPmessages_GetChatInviteImporters::Flag;
+			state->requestId = state->api->request(
+				MTPmessages_GetChatInviteImporters(
+					MTP_flags(Flag::f_requested),
+					peer->input,
+					MTPstring(), // link
+					MTPstring(), // q
+					MTP_int(0), // offset_date
+					MTP_inputUserEmpty(), // offset_user
+					MTP_int(kLimit))
+			).done([=](const MTPmessages_ChatInviteImporters &result) {
+				state->requestId = 0;
+
+				result.match([&](
+						const MTPDmessages_chatInviteImporters &data) {
+					const auto count = data.vcount().v;
+					const auto changed = (state->current.count != count);
+					const auto &importers = data.vimporters().v;
+					auto &owner = peer->owner();
+					state->users = std::vector<not_null<UserData*>>();
+					state->users.reserve(importers.size());
+					for (const auto &importer : importers) {
+						importer.match([&](
+								const MTPDchatInviteImporter &data) {
+							state->users.push_back(
+								owner.user(data.vuser_id()));
+						});
+					}
+					if (changed) {
+						state->current.count = count;
+					}
+					if (RegenerateUserpics(state, userpicSize) || changed) {
+						pushNext();
+					}
+					if (state->userpics.size() > state->current.count) {
+						state->requestUsers();
+					}
+				});
+			}).fail([=](const MTP::Error &error) {
+				state->requestId = 0;
+			}).send();
+		};
+
+		peer->session().downloaderTaskFinished(
+		) | rpl::filter([=] {
+			return state->someUserpicsNotLoaded;
+		}) | rpl::start_with_next([=] {
+			for (const auto &userpic : state->userpics) {
+				if (userpic.peer->userpicUniqueKey(userpic.view)
+					!= userpic.uniqueKey) {
+					RegenerateUserpics(state, userpicSize, true);
+					pushNext();
+					return;
+				}
+			}
+		}, lifetime);
+
+		Info::Profile::PendingRequestsCountValue(
+			peer
+		) | rpl::filter([=](int count) {
+			return (state->current.count != count);
+		}) | rpl::start_with_next([=](int count) {
+			const auto was = state->current.count;
+			const auto requestUsersNeeded = (was < kRequestAgainThreshold)
+				|| (count < kRequestAgainThreshold);
+			state->current.count = count;
+			if (requestUsersNeeded) {
+				state->requestUsers();
+			}
+			pushNext();
+		}, lifetime);
+
+		return lifetime;
+	};
+}
+
+} // namespace HistoryView

Telegram/SourceFiles/history/view/history_view_requests_bar.h

@@ -0,0 +1,22 @@
+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#pragma once
+
+#include "ui/rp_widget.h"
+
+namespace Ui {
+struct RequestsBarContent;
+} // namespace Ui
+
+namespace HistoryView {
+
+[[nodiscard]] rpl::producer<Ui::RequestsBarContent> RequestsBarContentByPeer(
+	not_null<PeerData*> peer,
+	int userpicSize);
+
+} // namespace HistoryView

Telegram/SourceFiles/ui/chat/chat.style

@@ -909,3 +909,11 @@ whoReadChecksDisabled: icon{{ "chat/seen_checks", menuFgDisabled }};
 whoReadPlayed: icon{{ "chat/seen_played", windowFg }};
 whoReadPlayedOver: icon{{ "chat/seen_played", windowFgOver }};
 whoReadPlayedDisabled: icon {{ "chat/seen_played", menuFgDisabled }};
+
+historyRequestsUserpics: GroupCallUserpics {
+	size: 22px;
+	shift: 8px;
+	stroke: 4px;
+	align: align(left);
+}
+historyRequestsHeight: 33px;

Telegram/SourceFiles/ui/chat/requests_bar.cpp

@@ -0,0 +1,220 @@
+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#include "ui/chat/requests_bar.h"
+
+#include "ui/chat/group_call_userpics.h"
+#include "ui/widgets/shadow.h"
+#include "lang/lang_keys.h"
+#include "styles/style_chat.h"
+#include "styles/style_calls.h"
+#include "styles/style_info.h" // st::topBarArrowPadding, like TopBarWidget.
+#include "styles/palette.h"
+
+#include <QtGui/QtEvents>
+
+namespace Ui {
+
+RequestsBar::RequestsBar(
+	not_null<QWidget*> parent,
+	rpl::producer<RequestsBarContent> content)
+: _wrap(parent, object_ptr<RpWidget>(parent))
+, _inner(_wrap.entity())
+, _shadow(std::make_unique<PlainShadow>(_wrap.parentWidget()))
+, _userpics(std::make_unique<GroupCallUserpics>(
+		st::historyRequestsUserpics,
+		rpl::single(false),
+		[=] { _inner->update(); })) {
+	_wrap.hide(anim::type::instant);
+	_shadow->hide();
+
+	_wrap.entity()->paintRequest(
+	) | rpl::start_with_next([=](QRect clip) {
+		QPainter(_wrap.entity()).fillRect(clip, st::historyPinnedBg);
+	}, lifetime());
+	_wrap.setAttribute(Qt::WA_OpaquePaintEvent);
+
+	auto copy = std::move(
+		content
+	) | rpl::start_spawning(_wrap.lifetime());
+
+	rpl::duplicate(
+		copy
+	) | rpl::start_with_next([=](RequestsBarContent &&content) {
+		_content = content;
+		if (_content.count > 0) {
+			_text = (_content.isGroup
+				? tr::lng_group_requests_pending
+				: tr::lng_group_requests_pending_channel)(
+					tr::now,
+					lt_count_decimal,
+					_content.count);
+		}
+		_userpics->update(_content.users, !_wrap.isHidden());
+		_inner->update();
+	}, lifetime());
+
+	std::move(
+		copy
+	) | rpl::map([=](const RequestsBarContent &content) {
+		return !content.count;
+	}) | rpl::start_with_next_done([=](bool hidden) {
+		_shouldBeShown = !hidden;
+		if (!_forceHidden) {
+			_wrap.toggle(_shouldBeShown, anim::type::normal);
+		}
+	}, [=] {
+		_forceHidden = true;
+		_wrap.toggle(false, anim::type::normal);
+	}, lifetime());
+
+	_userpics->widthValue(
+	) | rpl::start_with_next([=](int width) {
+		_userpicsWidth = width;
+	}, lifetime());
+
+	setupInner();
+}
+
+RequestsBar::~RequestsBar() = default;
+
+void RequestsBar::setupInner() {
+	_inner->resize(0, st::historyRequestsHeight);
+	_inner->paintRequest(
+	) | rpl::start_with_next([=](QRect rect) {
+		auto p = Painter(_inner);
+		paint(p);
+	}, _inner->lifetime());
+
+	// Clicks.
+	_inner->setCursor(style::cur_pointer);
+	_inner->events(
+	) | rpl::filter([=](not_null<QEvent*> event) {
+		return (event->type() == QEvent::MouseButtonPress);
+	}) | rpl::map([=] {
+		return _inner->events(
+		) | rpl::filter([=](not_null<QEvent*> event) {
+			return (event->type() == QEvent::MouseButtonRelease);
+		}) | rpl::take(1) | rpl::filter([=](not_null<QEvent*> event) {
+			return _inner->rect().contains(
+				static_cast<QMouseEvent*>(event.get())->pos());
+		});
+	}) | rpl::flatten_latest(
+	) | rpl::map([] {
+		return rpl::empty_value();
+	}) | rpl::start_to_stream(_barClicks, _inner->lifetime());
+
+	_wrap.geometryValue(
+	) | rpl::start_with_next([=](QRect rect) {
+		updateShadowGeometry(rect);
+		updateControlsGeometry(rect);
+	}, _inner->lifetime());
+}
+
+void RequestsBar::paint(Painter &p) {
+	p.fillRect(_inner->rect(), st::historyComposeAreaBg);
+
+	const auto userpicsSize = st::historyRequestsUserpics.size;
+	const auto userpicsTop = st::lineWidth + (st::historyRequestsHeight
+		- st::lineWidth
+		- userpicsSize) / 2;
+	const auto userpicsLeft = userpicsTop * 2;
+	const auto textTop = st::lineWidth + (st::historyRequestsHeight
+		- st::lineWidth
+		- st::msgServiceNameFont->height) / 2;
+	const auto width = _inner->width();
+	const auto &font = st::defaultMessageBar.title.font;
+	p.setPen(st::defaultMessageBar.titleFg);
+	p.setFont(font);
+
+	const auto textLeft = userpicsLeft + _userpicsWidth + userpicsLeft;
+	const auto available = width - textLeft - userpicsLeft;
+	p.drawTextLeft(textLeft, textTop, width, _text);
+
+	// Skip shadow of the bar above.
+	_userpics->paint(p, userpicsLeft, userpicsTop, userpicsSize);
+}
+
+void RequestsBar::updateControlsGeometry(QRect wrapGeometry) {
+	const auto hidden = _wrap.isHidden() || !wrapGeometry.height();
+	if (_shadow->isHidden() != hidden) {
+		_shadow->setVisible(!hidden);
+	}
+}
+
+void RequestsBar::setShadowGeometryPostprocess(Fn<QRect(QRect)> postprocess) {
+	_shadowGeometryPostprocess = std::move(postprocess);
+	updateShadowGeometry(_wrap.geometry());
+}
+
+void RequestsBar::updateShadowGeometry(QRect wrapGeometry) {
+	const auto regular = QRect(
+		wrapGeometry.x(),
+		wrapGeometry.y() + wrapGeometry.height(),
+		wrapGeometry.width(),
+		st::lineWidth);
+	_shadow->setGeometry(_shadowGeometryPostprocess
+		? _shadowGeometryPostprocess(regular)
+		: regular);
+}
+
+void RequestsBar::show() {
+	if (!_forceHidden) {
+		return;
+	}
+	_forceHidden = false;
+	if (_shouldBeShown) {
+		_wrap.show(anim::type::instant);
+		_shadow->show();
+	}
+}
+
+void RequestsBar::hide() {
+	if (_forceHidden) {
+		return;
+	}
+	_forceHidden = true;
+	_wrap.hide(anim::type::instant);
+	_shadow->hide();
+}
+
+void RequestsBar::raise() {
+	_wrap.raise();
+	_shadow->raise();
+}
+
+void RequestsBar::finishAnimating() {
+	_wrap.finishAnimating();
+}
+
+void RequestsBar::move(int x, int y) {
+	_wrap.move(x, y);
+}
+
+void RequestsBar::resizeToWidth(int width) {
+	_wrap.entity()->resizeToWidth(width);
+	_inner->resizeToWidth(width);
+}
+
+int RequestsBar::height() const {
+	return !_forceHidden
+		? _wrap.height()
+		: _shouldBeShown
+		? st::historyRequestsHeight
+		: 0;
+}
+
+rpl::producer<int> RequestsBar::heightValue() const {
+	return _wrap.heightValue();
+}
+
+rpl::producer<> RequestsBar::barClicks() const {
+	return _barClicks.events();
+}
+
+
+} // namespace Ui

Telegram/SourceFiles/ui/chat/requests_bar.h

@@ -0,0 +1,77 @@
+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#pragma once
+
+#include "ui/wrap/slide_wrap.h"
+#include "ui/effects/animations.h"
+#include "base/object_ptr.h"
+#include "base/timer.h"
+
+class Painter;
+
+namespace Ui {
+
+class PlainShadow;
+struct GroupCallUser;
+class GroupCallUserpics;
+
+struct RequestsBarContent {
+	std::vector<GroupCallUser> users;
+	int count = 0;
+	bool isGroup = false;
+};
+
+class RequestsBar final {
+public:
+	RequestsBar(
+		not_null<QWidget*> parent,
+		rpl::producer<RequestsBarContent> content);
+	~RequestsBar();
+
+	void show();
+	void hide();
+	void raise();
+	void finishAnimating();
+
+	void setShadowGeometryPostprocess(Fn<QRect(QRect)> postprocess);
+
+	void move(int x, int y);
+	void resizeToWidth(int width);
+	[[nodiscard]] int height() const;
+	[[nodiscard]] rpl::producer<int> heightValue() const;
+	[[nodiscard]] rpl::producer<> barClicks() const;
+
+	[[nodiscard]] rpl::lifetime &lifetime() {
+		return _wrap.lifetime();
+	}
+
+private:
+	using User = GroupCallUser;
+
+	void updateShadowGeometry(QRect wrapGeometry);
+	void updateControlsGeometry(QRect wrapGeometry);
+	void updateUserpics();
+	void setupInner();
+	void paint(Painter &p);
+
+	SlideWrap<> _wrap;
+	not_null<RpWidget*> _inner;
+	std::unique_ptr<PlainShadow> _shadow;
+	rpl::event_stream<> _barClicks;
+	Fn<QRect(QRect)> _shadowGeometryPostprocess;
+	bool _shouldBeShown = false;
+	bool _forceHidden = false;
+
+	RequestsBarContent _content;
+	std::unique_ptr<GroupCallUserpics> _userpics;
+	int _userpicsWidth = 0;
+	QString _text;
+
+};
+
+} // namespace Ui

Telegram/cmake/td_ui.cmake

@@ -162,6 +162,8 @@ PRIVATE
     ui/chat/message_bubble.h
     ui/chat/pinned_bar.cpp
     ui/chat/pinned_bar.h
+    ui/chat/requests_bar.cpp
+    ui/chat/requests_bar.h
     ui/controls/call_mute_button.cpp
     ui/controls/call_mute_button.h
     ui/controls/delete_message_context_action.cpp