Support nice empty topic view.

Telegram/Resources/langs/lang.strings

@@ -1509,7 +1509,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 "lng_action_gift_received" = "{user} sent you a gift for {cost}";
 "lng_action_gift_received_me" = "You sent to {user} a gift for {cost}";
 "lng_action_topic_created_inside" = "Topic created";
-"lng_action_topic_closed_inside" = "Topics closed";
+"lng_action_topic_closed_inside" = "Topic closed";
 "lng_action_topic_reopened_inside" = "Topic reopened";
 "lng_action_topic_created" = "{topic} — was created";
 "lng_action_topic_closed" = "{topic} — was closed";
@@ -3536,9 +3536,9 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 "lng_forum_topic_delete" = "Delete";
 "lng_forum_topic_delete_sure" = "Are you sure you want to delete this topic?";
 "lng_forum_topic_created_title_my" = "Almost done!";
-"lng_forum_topic_created_body_my" = "Send the first message to start this topic.";
+"lng_forum_topic_created_body_my" = "Send the first message\nto start this topic.";
 "lng_forum_topic_created_title" = "Topic started!";
-"lng_forum_topic_created_body" = "Send a message to open the discussion";
+"lng_forum_topic_created_body" = "Send a message to open\nthe discussion.";
 "lng_forum_topics_switch" = "Topics";
 "lng_forum_topics_not_enough#one" = "Only groups with more than **{count} member** can have topics enabled.";
 "lng_forum_topics_not_enough#other" = "Only groups with more than **{count} members** can have topics enabled.";

Telegram/SourceFiles/apiwrap.cpp

@@ -2016,6 +2016,10 @@ void ApiWrap::saveCurrentDraftToCloud() {
 	for (const auto &controller : _session->windows()) {
 		controller->materializeLocalDrafts();
 		if (const auto thread = controller->activeChatCurrent().thread()) {
+			const auto topic = thread->asTopic();
+			if (topic && topic->creating()) {
+				continue;
+			}
 			const auto history = thread->owningHistory();
 			_session->local().writeDrafts(history);
 

Telegram/SourceFiles/boxes/peers/edit_forum_topic_box.cpp

@@ -468,7 +468,6 @@ void EditForumTopicBox(
 		state->iconId = (iconId != kDefaultIconId) ? iconId : 0;
 	}, box->lifetime());
 
-	const auto requestId = std::make_shared<mtpRequestId>();
 	const auto create = [=] {
 		const auto channel = forum->peer->asChannel();
 		if (!channel || !channel->isForum()) {
@@ -505,9 +504,11 @@ void EditForumTopicBox(
 			topic->applyTitle(title->getLastText().trimmed());
 			topic->applyColorId(state->defaultIcon.current().colorId);
 			topic->applyIconId(state->iconId.current());
+			box->closeBox();
 		} else {
 			using Flag = MTPchannels_EditForumTopic::Flag;
 			const auto api = &forum->session().api();
+			const auto weak = Ui::MakeWeak(box.get());
 			state->requestId = api->request(MTPchannels_EditForumTopic(
 				MTP_flags(Flag::f_title | Flag::f_icon_emoji_id),
 				topic->channel()->inputChannel,
@@ -517,12 +518,16 @@ void EditForumTopicBox(
 				MTPBool() // closed
 			)).done([=](const MTPUpdates &result) {
 				api->applyUpdates(result);
-				box->closeBox();
+				if (const auto strong = weak.data()) {
+					strong->closeBox();
+				}
 			}).fail([=](const MTP::Error &error) {
-				if (error.type() == u"TOPIC_NOT_MODIFIED") {
-					box->closeBox();
-				} else {
-					state->requestId = -1;
+				if (const auto strong = weak.data()) {
+					if (error.type() == u"TOPIC_NOT_MODIFIED") {
+						strong->closeBox();
+					} else {
+						state->requestId = -1;
+					}
 				}
 			}).send();
 		}

Telegram/SourceFiles/history/view/history_view_context_menu.cpp

@@ -589,7 +589,7 @@ bool AddReplyToMessageAction(
 	const auto peer = item ? item->history()->peer.get() : nullptr;
 	if (!item
 		|| !item->isRegular()
-		|| (topic ? topic->canWrite() : !peer->canWrite())
+		|| (topic ? !topic->canWrite() : !peer->canWrite())
 		|| (context != Context::History && context != Context::Replies)) {
 		return false;
 	}

Telegram/SourceFiles/history/view/history_view_element.cpp

@@ -702,7 +702,7 @@ auto Element::contextDependentServiceText() -> TextWithLinks {
 			const QString &title,
 			std::optional<DocumentId> iconId) {
 		auto result = TextWithEntities{ title };
-		auto full = iconId
+		auto full = (iconId && *iconId)
 			? wrapIcon(*iconId).append(' ').append(std::move(result))
 			: result;
 		return Ui::Text::Link(std::move(full), topicUrl);

Telegram/SourceFiles/history/view/history_view_list_widget.cpp

@@ -1908,167 +1908,170 @@ void ListWidget::paintEvent(QPaintEvent *e) {
 		return this->itemTop(elem) < bottom;
 	});
 
-	if (from != end(_items)) {
-		_reactionsManager->startEffectsCollection();
+	auto context = preparePaintContext(clip);
+	if (from == end(_items)) {
+		_delegate->listPaintEmpty(p, context);
+		return;
+	}
+	_reactionsManager->startEffectsCollection();
 
-		const auto session = &controller()->session();
-		auto top = itemTop(from->get());
-		auto context = preparePaintContext(clip).translated(0, -top);
-		p.translate(0, top);
-		const auto &sendingAnimation = _controller->sendingAnimation();
-		for (auto i = from; i != to; ++i) {
-			const auto view = *i;
-			const auto item = view->data();
-			const auto height = view->height();
-			if (!sendingAnimation.hasAnimatedMessage(item)) {
-				context.reactionInfo
-					= _reactionsManager->currentReactionPaintInfo();
-				context.outbg = view->hasOutLayout();
-				context.selection = itemRenderSelection(view);
-				view->draw(p, context);
-			}
-			const auto isSponsored = item->isSponsored();
-			const auto isUnread = _delegate->listElementShownUnread(view)
-				&& item->isRegular();
-			const auto withReaction = item->hasUnreadReaction();
-			const auto yShown = [&](int y) {
-				return (_visibleBottom >= y && _visibleTop <= y);
-			};
-			const auto markShown = isSponsored
-				? view->markSponsoredViewed(_visibleBottom - top)
-				: withReaction
-				? yShown(top + context.reactionInfo->position.y())
-				: isUnread
-				? yShown(top + height)
-				: yShown(top + height / 2);
-			if (markShown) {
-				if (isSponsored) {
-					session->data().sponsoredMessages().view(
-						item->fullId());
-				} else if (isUnread) {
-					readTill = item;
-				}
-				if (item->hasViews()) {
-					session->api().views().scheduleIncrement(item);
-				}
-				if (withReaction) {
-					readContents.insert(item);
-				} else if (item->isUnreadMention()
-					&& !item->isUnreadMedia()) {
-					readContents.insert(item);
-					_highlighter.enqueue(view);
-				}
-			}
-			session->data().reactions().poll(item, context.now);
-			if (item->hasExtendedMediaPreview()) {
-				session->api().views().pollExtendedMedia(item);
-			}
-			_reactionsManager->recordCurrentReactionEffect(
-				item->fullId(),
-				QPoint(0, top));
-			top += height;
-			context.translate(0, -height);
-			p.translate(0, height);
+	const auto session = &controller()->session();
+	auto top = itemTop(from->get());
+	context = context.translated(0, -top);
+	p.translate(0, top);
+	const auto &sendingAnimation = _controller->sendingAnimation();
+	for (auto i = from; i != to; ++i) {
+		const auto view = *i;
+		const auto item = view->data();
+		const auto height = view->height();
+		if (!sendingAnimation.hasAnimatedMessage(item)) {
+			context.reactionInfo
+				= _reactionsManager->currentReactionPaintInfo();
+			context.outbg = view->hasOutLayout();
+			context.selection = itemRenderSelection(view);
+			view->draw(p, context);
 		}
-		context.translate(0, top);
-		p.translate(0, -top);
-
-		enumerateUserpics([&](not_null<Element*> view, int userpicTop) {
-			// stop the enumeration if the userpic is below the painted rect
-			if (userpicTop >= clip.top() + clip.height()) {
-				return false;
+		const auto isSponsored = item->isSponsored();
+		const auto isUnread = _delegate->listElementShownUnread(view)
+			&& item->isRegular();
+		const auto withReaction = item->hasUnreadReaction();
+		const auto yShown = [&](int y) {
+			return (_visibleBottom >= y && _visibleTop <= y);
+		};
+		const auto markShown = isSponsored
+			? view->markSponsoredViewed(_visibleBottom - top)
+			: withReaction
+			? yShown(top + context.reactionInfo->position.y())
+			: isUnread
+			? yShown(top + height)
+			: yShown(top + height / 2);
+		if (markShown) {
+			if (isSponsored) {
+				session->data().sponsoredMessages().view(
+					item->fullId());
+			} else if (isUnread) {
+				readTill = item;
 			}
+			if (item->hasViews()) {
+				session->api().views().scheduleIncrement(item);
+			}
+			if (withReaction) {
+				readContents.insert(item);
+			} else if (item->isUnreadMention()
+				&& !item->isUnreadMedia()) {
+				readContents.insert(item);
+				_highlighter.enqueue(view);
+			}
+		}
+		session->data().reactions().poll(item, context.now);
+		if (item->hasExtendedMediaPreview()) {
+			session->api().views().pollExtendedMedia(item);
+		}
+		_reactionsManager->recordCurrentReactionEffect(
+			item->fullId(),
+			QPoint(0, top));
+		top += height;
+		context.translate(0, -height);
+		p.translate(0, height);
+	}
+	context.translate(0, top);
+	p.translate(0, -top);
 
-			// paint the userpic if it intersects the painted rect
-			if (userpicTop + st::msgPhotoSize > clip.top()) {
-				if (const auto from = view->data()->displayFrom()) {
-					from->paintUserpicLeft(
+	enumerateUserpics([&](not_null<Element*> view, int userpicTop) {
+		// stop the enumeration if the userpic is below the painted rect
+		if (userpicTop >= clip.top() + clip.height()) {
+			return false;
+		}
+
+		// paint the userpic if it intersects the painted rect
+		if (userpicTop + st::msgPhotoSize > clip.top()) {
+			if (const auto from = view->data()->displayFrom()) {
+				from->paintUserpicLeft(
+					p,
+					_userpics[from],
+					st::historyPhotoLeft,
+					userpicTop,
+					view->width(),
+					st::msgPhotoSize);
+			} else if (const auto info = view->data()->hiddenSenderInfo()) {
+				if (info->customUserpic.empty()) {
+					info->emptyUserpic.paint(
 						p,
-						_userpics[from],
 						st::historyPhotoLeft,
 						userpicTop,
 						view->width(),
 						st::msgPhotoSize);
-				} else if (const auto info = view->data()->hiddenSenderInfo()) {
-					if (info->customUserpic.empty()) {
-						info->emptyUserpic.paint(
-							p,
-							st::historyPhotoLeft,
-							userpicTop,
-							view->width(),
-							st::msgPhotoSize);
-					} else {
-						const auto painted = info->paintCustomUserpic(
-							p,
-							st::historyPhotoLeft,
-							userpicTop,
-							view->width(),
-							st::msgPhotoSize);
-						if (!painted) {
-							const auto itemId = view->data()->fullId();
-							auto &v = _sponsoredUserpics[itemId.msg];
-							if (!info->customUserpic.isCurrentView(v)) {
-								v = info->customUserpic.createView();
-								info->customUserpic.load(session, itemId);
-							}
+				} else {
+					const auto painted = info->paintCustomUserpic(
+						p,
+						st::historyPhotoLeft,
+						userpicTop,
+						view->width(),
+						st::msgPhotoSize);
+					if (!painted) {
+						const auto itemId = view->data()->fullId();
+						auto &v = _sponsoredUserpics[itemId.msg];
+						if (!info->customUserpic.isCurrentView(v)) {
+							v = info->customUserpic.createView();
+							info->customUserpic.load(session, itemId);
 						}
 					}
+				}
+			} else {
+				Unexpected("Corrupt forwarded information in message.");
+			}
+		}
+		return true;
+	});
+
+	auto dateHeight = st::msgServicePadding.bottom() + st::msgServiceFont->height + st::msgServicePadding.top();
+	auto scrollDateOpacity = _scrollDateOpacity.value(_scrollDateShown ? 1. : 0.);
+	enumerateDates([&](not_null<Element*> view, int itemtop, int dateTop) {
+		// stop the enumeration if the date is above the painted rect
+		if (dateTop + dateHeight <= clip.top()) {
+			return false;
+		}
+
+		const auto displayDate = view->displayDate();
+		auto dateInPlace = displayDate;
+		if (dateInPlace) {
+			const auto correctDateTop = itemtop + st::msgServiceMargin.top();
+			dateInPlace = (dateTop < correctDateTop + dateHeight);
+		}
+		//bool noFloatingDate = (item->date.date() == lastDate && displayDate);
+		//if (noFloatingDate) {
+		//	if (itemtop < showFloatingBefore) {
+		//		noFloatingDate = false;
+		//	}
+		//}
+
+		// paint the date if it intersects the painted rect
+		if (dateTop < clip.top() + clip.height()) {
+			auto opacity = (dateInPlace/* || noFloatingDate*/) ? 1. : scrollDateOpacity;
+			if (opacity > 0.) {
+				p.setOpacity(opacity);
+				int dateY = /*noFloatingDate ? itemtop :*/ (dateTop - st::msgServiceMargin.top());
+				int width = view->width();
+				if (const auto date = view->Get<HistoryView::DateBadge>()) {
+					date->paint(p, context.st, dateY, width, _isChatWide);
 				} else {
-					Unexpected("Corrupt forwarded information in message.");
+					ServiceMessagePainter::PaintDate(
+						p,
+						context.st,
+						ItemDateText(
+							view->data(),
+							IsItemScheduledUntilOnline(view->data())),
+						dateY,
+						width,
+						_isChatWide);
 				}
 			}
-			return true;
-		});
+		}
+		return true;
+	});
 
-		auto dateHeight = st::msgServicePadding.bottom() + st::msgServiceFont->height + st::msgServicePadding.top();
-		auto scrollDateOpacity = _scrollDateOpacity.value(_scrollDateShown ? 1. : 0.);
-		enumerateDates([&](not_null<Element*> view, int itemtop, int dateTop) {
-			// stop the enumeration if the date is above the painted rect
-			if (dateTop + dateHeight <= clip.top()) {
-				return false;
-			}
-
-			const auto displayDate = view->displayDate();
-			auto dateInPlace = displayDate;
-			if (dateInPlace) {
-				const auto correctDateTop = itemtop + st::msgServiceMargin.top();
-				dateInPlace = (dateTop < correctDateTop + dateHeight);
-			}
-			//bool noFloatingDate = (item->date.date() == lastDate && displayDate);
-			//if (noFloatingDate) {
-			//	if (itemtop < showFloatingBefore) {
-			//		noFloatingDate = false;
-			//	}
-			//}
-
-			// paint the date if it intersects the painted rect
-			if (dateTop < clip.top() + clip.height()) {
-				auto opacity = (dateInPlace/* || noFloatingDate*/) ? 1. : scrollDateOpacity;
-				if (opacity > 0.) {
-					p.setOpacity(opacity);
-					int dateY = /*noFloatingDate ? itemtop :*/ (dateTop - st::msgServiceMargin.top());
-					int width = view->width();
-					if (const auto date = view->Get<HistoryView::DateBadge>()) {
-						date->paint(p, context.st, dateY, width, _isChatWide);
-					} else {
-						ServiceMessagePainter::PaintDate(
-							p,
-							context.st,
-							ItemDateText(
-								view->data(),
-								IsItemScheduledUntilOnline(view->data())),
-							dateY,
-							width,
-							_isChatWide);
-					}
-				}
-			}
-			return true;
-		});
-
-		_reactionsManager->paint(p, context);
-		_emojiInteractions->paint(p);
-	}
+	_reactionsManager->paint(p, context);
+	_emojiInteractions->paint(p);
 }
 
 void ListWidget::maybeMarkReactionsRead(not_null<HistoryItem*> item) {

Telegram/SourceFiles/history/view/history_view_list_widget.h

@@ -132,6 +132,9 @@ public:
 		not_null<DocumentData*> document,
 		FullMsgId context,
 		bool showInMediaView) = 0;
+	virtual void listPaintEmpty(
+		Painter &p,
+		const Ui::ChatPaintContext &context) = 0;
 };
 
 struct SelectionData {

Telegram/SourceFiles/history/view/history_view_pinned_section.cpp

@@ -603,6 +603,11 @@ void PinnedWidget::listOpenDocument(
 	controller()->openDocument(document, context, MsgId(), showInMediaView);
 }
 
+void PinnedWidget::listPaintEmpty(
+	Painter &p,
+	const Ui::ChatPaintContext &context) {
+}
+
 void PinnedWidget::confirmDeleteSelected() {
 	ConfirmDeleteSelectedItems(_inner);
 }

Telegram/SourceFiles/history/view/history_view_pinned_section.h

@@ -119,6 +119,9 @@ public:
 		not_null<DocumentData*> document,
 		FullMsgId context,
 		bool showInMediaView) override;
+	void listPaintEmpty(
+		Painter &p,
+		const Ui::ChatPaintContext &context) override;
 
 	// CornerButtonsDelegate delegate.
 	void cornerButtonsShowAtPosition(

Telegram/SourceFiles/history/view/history_view_replies_section.cpp

@@ -15,6 +15,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "history/view/history_view_sticker_toast.h"
 #include "history/view/history_view_cursor_state.h"
 #include "history/view/history_view_contact_status.h"
+#include "history/view/history_view_service_message.h"
 #include "history/history.h"
 #include "history/history_drag_area.h"
 #include "history/history_item_components.h"
@@ -355,16 +356,17 @@ RepliesWidget::RepliesWidget(
 }
 
 RepliesWidget::~RepliesWidget() {
+	base::take(_sendAction);
+	session().api().saveCurrentDraftToCloud();
+	controller()->sendingAnimation().clear();
 	if (_topic && _topic->creating()) {
+		_emptyPainter = nullptr;
 		_topic->discard();
 		_topic = nullptr;
 	}
-	base::take(_sendAction);
 	_history->owner().sendActionManager().repliesPainterRemoved(
 		_history,
 		_rootId);
-	session().api().saveCurrentDraftToCloud();
-	controller()->sendingAnimation().clear();
 }
 
 void RepliesWidget::orderWidgets() {
@@ -518,6 +520,11 @@ void RepliesWidget::setTopic(Data::ForumTopic *topic) {
 		}
 		subscribeToTopic();
 	}
+	if (_topic && emptyShown()) {
+		setupEmptyPainter();
+	} else {
+		_emptyPainter = nullptr;
+	}
 }
 
 HistoryItem *RepliesWidget::lookupRoot() const {
@@ -1772,6 +1779,12 @@ void RepliesWidget::paintEvent(QPaintEvent *e) {
 	SectionWidget::PaintBackground(controller(), _theme.get(), this, bg);
 }
 
+bool RepliesWidget::emptyShown() const {
+	return _topic
+		&& (_inner->isEmpty()
+			|| (_topic->lastKnownServerMessageId() == _rootId));
+}
+
 void RepliesWidget::onScroll() {
 	if (_skipScrollEvent) {
 		return;
@@ -2065,6 +2078,32 @@ void RepliesWidget::listOpenDocument(
 	controller()->openDocument(document, context, _rootId, showInMediaView);
 }
 
+void RepliesWidget::listPaintEmpty(
+		Painter &p,
+		const Ui::ChatPaintContext &context) {
+	if (!emptyShown()) {
+		return;
+	} else if (!_emptyPainter) {
+		setupEmptyPainter();
+	}
+	_emptyPainter->paint(p, context.st, width(), _scroll->height());
+}
+
+void RepliesWidget::setupEmptyPainter() {
+	Expects(_topic != nullptr);
+
+	_emptyPainter = std::make_unique<EmptyPainter>(_topic, [=] {
+		return controller()->isGifPausedAtLeastFor(
+			Window::GifPauseReason::Any);
+	}, [=] {
+		if (emptyShown()) {
+			update();
+		} else {
+			_emptyPainter = nullptr;
+		}
+	});
+}
+
 void RepliesWidget::confirmDeleteSelected() {
 	ConfirmDeleteSelectedItems(_inner);
 }

Telegram/SourceFiles/history/view/history_view_replies_section.h

@@ -66,6 +66,7 @@ class ComposeControls;
 class SendActionPainter;
 class StickerToast;
 class TopicReopenBar;
+class EmptyPainter;
 
 class RepliesWidget final
 	: public Window::SectionWidget
@@ -158,6 +159,9 @@ public:
 		not_null<DocumentData*> document,
 		FullMsgId context,
 		bool showInMediaView) override;
+	void listPaintEmpty(
+		Painter &p,
+		const Ui::ChatPaintContext &context) override;
 
 	// CornerButtonsDelegate delegate.
 	void cornerButtonsShowAtPosition(
@@ -275,7 +279,9 @@ private:
 		Api::SendOptions options,
 		std::optional<MsgId> localMessageId);
 
+	void setupEmptyPainter();
 	void refreshJoinGroupButton();
+	[[nodiscard]] bool emptyShown() const;
 	[[nodiscard]] bool showSlowmodeError();
 	[[nodiscard]] std::optional<QString> writeRestriction() const;
 
@@ -296,6 +302,7 @@ private:
 	std::unique_ptr<ComposeControls> _composeControls;
 	std::unique_ptr<Ui::FlatButton> _joinGroup;
 	std::unique_ptr<TopicReopenBar> _topicReopenBar;
+	std::unique_ptr<EmptyPainter> _emptyPainter;
 	bool _skipScrollEvent = false;
 
 	std::unique_ptr<Ui::PinnedBar> _rootView;

Telegram/SourceFiles/history/view/history_view_scheduled_section.cpp

@@ -1282,6 +1282,11 @@ void ScheduledWidget::listOpenDocument(
 	controller()->openDocument(document, context, MsgId(), showInMediaView);
 }
 
+void ScheduledWidget::listPaintEmpty(
+	Painter &p,
+	const Ui::ChatPaintContext &context) {
+}
+
 void ScheduledWidget::confirmSendNowSelected() {
 	ConfirmSendNowSelectedItems(_inner);
 }

Telegram/SourceFiles/history/view/history_view_scheduled_section.h

@@ -142,6 +142,9 @@ public:
 		not_null<DocumentData*> document,
 		FullMsgId context,
 		bool showInMediaView) override;
+	void listPaintEmpty(
+		Painter &p,
+		const Ui::ChatPaintContext &context) override;
 
 	// CornerButtonsDelegate delegate.
 	void cornerButtonsShowAtPosition(

Telegram/SourceFiles/history/view/history_view_service_message.cpp

@@ -15,18 +15,28 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "data/data_abstract_structure.h"
 #include "data/data_chat.h"
 #include "data/data_channel.h"
+#include "info/profile/info_profile_cover.h"
 #include "ui/chat/chat_style.h"
 #include "ui/text/text_options.h"
 #include "ui/painter.h"
 #include "ui/ui_utility.h"
 #include "mainwidget.h"
 #include "menu/menu_ttl_validator.h"
+#include "data/data_forum_topic.h"
 #include "lang/lang_keys.h"
 #include "styles/style_chat.h"
+#include "styles/style_info.h"
 
 namespace HistoryView {
 namespace {
 
+TextParseOptions EmptyLineOptions = {
+	TextParseMultiline, // flags
+	4096, // maxw
+	1, // maxh
+	Qt::LayoutDirectionAuto, // lang-dependent
+};
+
 enum CircleMask {
 	NormalMask     = 0x00,
 	InvertedMask   = 0x01,
@@ -181,7 +191,11 @@ bool NeedAboutGroup(not_null<History*> history) {
 	return false;
 }
 
-} // namepsace
+void SetText(Ui::Text::String &text, const QString &content) {
+	text.setText(st::serviceTextStyle, content, EmptyLineOptions);
+}
+
+} // namespace
 
 int WideChatWidth() {
 	return st::msgMaxWidth + 2 * st::msgPhotoSkip + 2 * st::msgMargin.left();
@@ -657,6 +671,21 @@ EmptyPainter::EmptyPainter(not_null<History*> history)
 	}
 }
 
+EmptyPainter::EmptyPainter(
+	not_null<Data::ForumTopic*> topic,
+	Fn<bool()> paused,
+	Fn<void()> update)
+: _history(topic->history())
+, _topic(topic)
+, _icon(
+	std::make_unique<Info::Profile::TopicIconView>(topic, paused, update))
+, _header(st::msgMinWidth)
+, _text(st::msgMinWidth) {
+	fillAboutTopic();
+}
+
+EmptyPainter::~EmptyPainter() = default;
+
 void EmptyPainter::fillAboutGroup() {
 	const auto phrases = {
 		tr::lng_group_about1(tr::now),
@@ -664,34 +693,38 @@ void EmptyPainter::fillAboutGroup() {
 		tr::lng_group_about3(tr::now),
 		tr::lng_group_about4(tr::now),
 	};
-	const auto setText = [](Ui::Text::String &text, const QString &content) {
-		text.setText(
-			st::serviceTextStyle,
-			content,
-			Ui::NameTextOptions());
-	};
-	setText(_header, tr::lng_group_about_header(tr::now));
-	setText(_text, tr::lng_group_about_text(tr::now));
+	SetText(_header, tr::lng_group_about_header(tr::now));
+	SetText(_text, tr::lng_group_about_text(tr::now));
 	for (const auto &text : phrases) {
 		_phrases.emplace_back(st::msgMinWidth);
-		setText(_phrases.back(), text);
+		SetText(_phrases.back(), text);
 	}
 }
 
+void EmptyPainter::fillAboutTopic() {
+	SetText(_header, _topic->my()
+		? tr::lng_forum_topic_created_title_my(tr::now)
+		: tr::lng_forum_topic_created_title(tr::now));
+	SetText(_text, _topic->my()
+		? tr::lng_forum_topic_created_body_my(tr::now)
+		: tr::lng_forum_topic_created_body(tr::now));
+}
+
 void EmptyPainter::paint(
 		Painter &p,
 		not_null<const Ui::ChatStyle*> st,
 		int width,
 		int height) {
-	if (_phrases.empty()) {
+	if (_phrases.empty() && _text.isEmpty()) {
 		return;
 	}
 	constexpr auto kMaxTextLines = 3;
-	const auto maxPhraseWidth = ranges::max_element(
-		_phrases,
-		ranges::less(),
-		&Ui::Text::String::maxWidth
-	)->maxWidth();
+	const auto maxPhraseWidth = _phrases.empty()
+		? 0
+		: ranges::max_element(
+			_phrases,
+			ranges::less(),
+			&Ui::Text::String::maxWidth)->maxWidth();
 
 	const auto &font = st::serviceTextStyle.font;
 	const auto maxBubbleWidth = width - 2 * st::historyGroupAboutMargin;
@@ -708,13 +741,17 @@ void EmptyPainter::paint(
 			text.countHeight(innerWidth),
 			kMaxTextLines * font->height);
 	};
+	const auto iconHeight = _icon
+		? st::infoTopicCover.photo.size.height()
+		: 0;
 	const auto bubbleHeight = padding.top()
+		+ (_icon ? (iconHeight + st::historyGroupAboutHeaderSkip) : 0)
 		+ textHeight(_header)
 		+ st::historyGroupAboutHeaderSkip
 		+ textHeight(_text)
 		+ st::historyGroupAboutTextSkip
 		+ ranges::accumulate(_phrases, 0, ranges::plus(), textHeight)
-		+ st::historyGroupAboutSkip * int(_phrases.size() - 1)
+		+ st::historyGroupAboutSkip * std::max(int(_phrases.size()) - 1, 0)
 		+ padding.bottom();
 	const auto bubbleLeft = (width - bubbleWidth) / 2;
 	const auto bubbleTop = (height - bubbleHeight) / 2;
@@ -731,6 +768,13 @@ void EmptyPainter::paint(
 	const auto left = bubbleLeft + padding.left();
 	auto top = bubbleTop + padding.top();
 
+	if (_icon) {
+		_icon->paintInRect(
+			p,
+			QRect(bubbleLeft, top, bubbleWidth, iconHeight));
+		top += iconHeight + st::historyGroupAboutHeaderSkip;
+	}
+
 	_header.drawElided(
 		p,
 		left,
@@ -745,7 +789,8 @@ void EmptyPainter::paint(
 		left,
 		top,
 		innerWidth,
-		kMaxTextLines);
+		kMaxTextLines,
+		_topic ? style::al_top : style::al_topleft);
 	top += textHeight(_text) + st::historyGroupAboutTextSkip;
 
 	for (const auto &text : _phrases) {

Telegram/SourceFiles/history/view/history_view_service_message.h

@@ -16,6 +16,14 @@ class ChatStyle;
 struct CornersPixmaps;
 } // namespace Ui
 
+namespace Data {
+class ForumTopic;
+} // namespace Data
+
+namespace Info::Profile {
+class TopicIconView;
+} // namespace Info::Profile
+
 namespace HistoryView {
 
 class Service final : public Element {
@@ -116,6 +124,11 @@ private:
 class EmptyPainter {
 public:
 	explicit EmptyPainter(not_null<History*> history);
+	EmptyPainter(
+		not_null<Data::ForumTopic*> topic,
+		Fn<bool()> paused,
+		Fn<void()> update);
+	~EmptyPainter();
 
 	void paint(
 		Painter &p,
@@ -125,12 +138,17 @@ public:
 
 private:
 	void fillAboutGroup();
+	void fillAboutTopic();
 
 	not_null<History*> _history;
+	Data::ForumTopic *_topic = nullptr;
+	std::unique_ptr<Info::Profile::TopicIconView> _icon;
 	Ui::Text::String _header;
 	Ui::Text::String _text;
 	std::vector<Ui::Text::String> _phrases;
 
+	rpl::lifetime _lifetime;
+
 };
 
 } // namespace HistoryView

Telegram/SourceFiles/history/view/media/history_view_sticker_player.cpp

@@ -123,7 +123,6 @@ StaticStickerPlayer::StaticStickerPlayer(
 : _frame(Images::Read({
 	.path = location.name(),
 	.content = data,
-	.forceOpaque = true,
 }).image) {
 	if (!_frame.isNull()) {
 		size = _frame.size().scaled(size, Qt::KeepAspectRatio);

Telegram/SourceFiles/info/profile/info_profile_cover.cpp

@@ -118,54 +118,59 @@ Cover::Cover(
 }
 
 TopicIconView::TopicIconView(
-	QWidget *parent,
-	not_null<Window::SessionController*> controller,
-	not_null<Data::ForumTopic*> topic)
-: AbstractButton(parent) {
-	setup(topic, [=] {
-		return controller->isGifPausedAtLeastFor(
-			Window::GifPauseReason::Layer);
-	});
+	not_null<Data::ForumTopic*> topic,
+	Fn<bool()> paused,
+	Fn<void()> update)
+: _topic(topic)
+, _paused(std::move(paused))
+, _update(std::move(update)) {
+	setup(topic);
 }
 
-void TopicIconView::setup(
-		not_null<Data::ForumTopic*> topic,
-		Fn<bool()> paused) {
+void TopicIconView::paintInRect(QPainter &p, QRect rect) {
+	const auto paint = [&](const QImage &image) {
+		const auto size = image.size() / image.devicePixelRatio();
+		p.drawImage(
+			rect.x() + (rect.width() - size.width()) / 2,
+			rect.y() + (rect.height() - size.height()) / 2,
+			image);
+	};
+	if (_player && _player->ready()) {
+		paint(_player->frame(
+			st::infoTopicCover.photo.size,
+			QColor(0, 0, 0, 0),
+			false,
+			crl::now(),
+			_paused()).image);
+		_player->markFrameShown();
+	} else if (!_topic->iconId() && !_image.isNull()) {
+		paint(_image);
+	}
+}
+
+void TopicIconView::setup(not_null<Data::ForumTopic*> topic) {
 	setupPlayer(topic);
 	setupImage(topic);
-
-	resize(st::infoTopicCover.photo.size);
-	paintRequest(
-	) | rpl::start_with_next([=] {
-		auto p = QPainter(this);
-		const auto paint = [&](const QImage &image) {
-			const auto size = image.size() / image.devicePixelRatio();
-			p.drawImage(
-				(st::infoTopicCover.photo.size.width() - size.width()) / 2,
-				(st::infoTopicCover.photo.size.height() - size.height()) / 2,
-				image);
-		};
-		if (_player && _player->ready()) {
-			paint(_player->frame(
-				st::infoTopicCover.photo.size,
-				QColor(0, 0, 0, 0),
-				false,
-				crl::now(),
-				paused()).image);
-			_player->markFrameShown();
-		} else if (!topic->iconId() && !_image.isNull()) {
-			paint(_image);
-		}
-	}, lifetime());
 }
 
 void TopicIconView::setupPlayer(not_null<Data::ForumTopic*> topic) {
 	IconIdValue(
 		topic
-	) | rpl::map([=](DocumentId id) {
-		return topic->owner().customEmojiManager().resolve(id);
+	) | rpl::map([=](DocumentId id) -> rpl::producer<DocumentData*> {
+		if (!id) {
+			return rpl::single((DocumentData*)nullptr);
+		}
+		return topic->owner().customEmojiManager().resolve(
+			id
+		) | rpl::map([=](not_null<DocumentData*> document) {
+			return document.get();
+		});
 	}) | rpl::flatten_latest(
-	) | rpl::map([=](not_null<DocumentData*> document) {
+	) | rpl::map([=](DocumentData *document)
+	-> rpl::producer<std::shared_ptr<StickerPlayer>> {
+		if (!document) {
+			return rpl::single(std::shared_ptr<StickerPlayer>());
+		}
 		const auto media = document->createMediaView();
 		media->checkStickerLarge();
 		media->goodThumbnailWanted();
@@ -195,13 +200,16 @@ void TopicIconView::setupPlayer(not_null<Data::ForumTopic*> topic) {
 					media->bytes(),
 					st::infoTopicCover.photo.size);
 			}
-			result->setRepaintCallback([=] { update(); });
+			result->setRepaintCallback(_update);
 			return result;
 		});
 	}) | rpl::flatten_latest(
 	) | rpl::start_with_next([=](std::shared_ptr<StickerPlayer> player) {
 		_player = std::move(player);
-	}, lifetime());
+		if (!_player) {
+			_update();
+		}
+	}, _lifetime);
 }
 
 void TopicIconView::setupImage(not_null<Data::ForumTopic*> topic) {
@@ -213,7 +221,25 @@ void TopicIconView::setupImage(not_null<Data::ForumTopic*> topic) {
 		return ForumTopicIconFrame(colorId, title, st::infoForumTopicIcon);
 	}) | rpl::start_with_next([=](QImage &&image) {
 		_image = std::move(image);
-		update();
+		_update();
+	}, _lifetime);
+}
+
+TopicIconButton::TopicIconButton(
+	QWidget *parent,
+	not_null<Window::SessionController*> controller,
+	not_null<Data::ForumTopic*> topic)
+: AbstractButton(parent)
+, _view(
+		topic,
+		[=] { return controller->isGifPausedAtLeastFor(
+			Window::GifPauseReason::Layer); },
+		[=] { update(); }) {
+	resize(st::infoTopicCover.photo.size);
+	paintRequest(
+	) | rpl::start_with_next([=] {
+		auto p = QPainter(this);
+		_view.paintInRect(p, rect());
 	}, lifetime());
 }
 
@@ -248,8 +274,8 @@ Cover::Cover(
 		_peer,
 		Ui::UserpicButton::Role::OpenPhoto,
 		_st.photo))
-, _iconView(topic
-	? object_ptr<TopicIconView>(this, controller, topic)
+, _iconButton(topic
+	? object_ptr<TopicIconButton>(this, controller, topic)
 	: nullptr)
 , _name(this, _st.name)
 , _status(this, _st.status)
@@ -285,7 +311,7 @@ Cover::Cover(
 				_userpic->takeResultImage());
 		}, _userpic->lifetime());
 	} else if (topic->canEdit()) {
-		_iconView->setClickedCallback([=] {
+		_iconButton->setClickedCallback([=] {
 			_controller->show(Box(
 				EditForumTopicBox,
 				_controller,
@@ -293,7 +319,7 @@ Cover::Cover(
 				topic->rootId()));
 		});
 	} else {
-		_iconView->setAttribute(Qt::WA_TransparentForMouseEvents);
+		_iconButton->setAttribute(Qt::WA_TransparentForMouseEvents);
 	}
 }
 
@@ -303,7 +329,7 @@ void Cover::setupChildGeometry() {
 		if (_userpic) {
 			_userpic->moveToLeft(_st.photoLeft, _st.photoTop, newWidth);
 		} else {
-			_iconView->moveToLeft(_st.photoLeft, _st.photoTop, newWidth);
+			_iconButton->moveToLeft(_st.photoLeft, _st.photoTop, newWidth);
 		}
 		refreshNameGeometry(newWidth);
 		refreshStatusGeometry(newWidth);

Telegram/SourceFiles/info/profile/info_profile_cover.h

@@ -44,24 +44,40 @@ namespace Info::Profile {
 class EmojiStatusPanel;
 class Badge;
 
-class TopicIconView final : public Ui::AbstractButton {
+class TopicIconView final {
 public:
 	TopicIconView(
+		not_null<Data::ForumTopic*> topic,
+		Fn<bool()> paused,
+		Fn<void()> update);
+
+	void paintInRect(QPainter &p, QRect rect);
+
+private:
+	using StickerPlayer = HistoryView::StickerPlayer;
+
+	void setup(not_null<Data::ForumTopic*> topic);
+	void setupPlayer(not_null<Data::ForumTopic*> topic);
+	void setupImage(not_null<Data::ForumTopic*> topic);
+
+	const not_null<Data::ForumTopic*> _topic;
+	Fn<bool()> _paused;
+	Fn<void()> _update;
+	std::shared_ptr<StickerPlayer> _player;
+	QImage _image;
+	rpl::lifetime _lifetime;
+
+};
+
+class TopicIconButton final : public Ui::AbstractButton {
+public:
+	TopicIconButton(
 		QWidget *parent,
 		not_null<Window::SessionController*> controller,
 		not_null<Data::ForumTopic*> topic);
 
 private:
-	using StickerPlayer = HistoryView::StickerPlayer;
-
-	void setup(
-		not_null<Data::ForumTopic*> topic,
-		Fn<bool()> paused);
-	void setupPlayer(not_null<Data::ForumTopic*> topic);
-	void setupImage(not_null<Data::ForumTopic*> topic);
-
-	std::shared_ptr<StickerPlayer> _player;
-	QImage _image;
+	TopicIconView _view;
 
 };
 
@@ -112,7 +128,7 @@ private:
 	int _onlineCount = 0;
 
 	object_ptr<Ui::UserpicButton> _userpic;
-	object_ptr<TopicIconView> _iconView;
+	object_ptr<TopicIconButton> _iconButton;
 	object_ptr<Ui::FlatLabel> _name = { nullptr };
 	object_ptr<Ui::FlatLabel> _status = { nullptr };
 	//object_ptr<CoverDropArea> _dropArea = { nullptr };