Animate topic icons only twice in topics list.

Telegram/SourceFiles/data/data_channel.cpp

@@ -15,6 +15,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "data/data_session.h"
 #include "data/data_folder.h"
 #include "data/data_forum.h"
+#include "data/data_forum_icons.h"
 #include "data/data_location.h"
 #include "data/data_histories.h"
 #include "data/data_group_call.h"
@@ -164,8 +165,9 @@ void ChannelData::setFlags(ChannelDataFlags which) {
 	const auto taken = ((diff & Flag::Forum) && !(which & Flag::Forum))
 		? mgInfo->takeForumData()
 		: nullptr;
-
-	if ((diff & Flag::Forum) && (which & Flag::Forum)) {
+	if (const auto raw = taken.get()) {
+		owner().forumIcons().clearUserpicsReset(taken.get());
+	} else if ((diff & Flag::Forum) && (which & Flag::Forum)) {
 		mgInfo->ensureForum(this);
 	}
 	_flags.set(which);

Telegram/SourceFiles/data/data_forum_icons.cpp

@@ -10,6 +10,8 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "main/main_session.h"
 #include "data/data_session.h"
 #include "data/data_document.h"
+#include "data/data_forum.h"
+#include "data/data_forum_topic.h"
 #include "apiwrap.h"
 
 namespace Data {
@@ -22,7 +24,8 @@ constexpr auto kMaxTimeout = 6 * 60 * 60 * crl::time(1000);
 } // namespace
 
 ForumIcons::ForumIcons(not_null<Session*> owner)
-: _owner(owner) {
+: _owner(owner)
+, _resetUserpicsTimer([=] { resetUserpics(); }) {
 }
 
 ForumIcons::~ForumIcons() = default;
@@ -79,4 +82,45 @@ void ForumIcons::updateDefault(const MTPDmessages_stickerSet &data) {
 	_defaultUpdated.fire({});
 }
 
+void ForumIcons::scheduleUserpicsReset(not_null<Forum*> forum) {
+	const auto duration = crl::time(st::slideDuration);
+	_resetUserpicsWhen[forum] = crl::now() + duration;
+	if (!_resetUserpicsTimer.isActive()) {
+		_resetUserpicsTimer.callOnce(duration);
+	}
+}
+
+void ForumIcons::clearUserpicsReset(not_null<Forum*> forum) {
+	_resetUserpicsWhen.remove(forum);
+}
+
+void ForumIcons::resetUserpics() {
+	auto nearest = crl::time();
+	auto now = crl::now();
+	for (auto i = begin(_resetUserpicsWhen); i != end(_resetUserpicsWhen);) {
+		if (i->second > now) {
+			if (!nearest || nearest > i->second) {
+				nearest = i->second;
+			}
+			++i;
+		} else {
+			const auto forum = i->first;
+			i = _resetUserpicsWhen.erase(i);
+			resetUserpicsFor(forum);
+		}
+	}
+	if (nearest) {
+		_resetUserpicsTimer.callOnce(
+			std::min(nearest - now, 86400 * crl::time(1000)));
+	} else {
+		_resetUserpicsTimer.cancel();
+	}
+}
+
+void ForumIcons::resetUserpicsFor(not_null<Forum*> forum) {
+	forum->enumerateTopics([](not_null<ForumTopic*> topic) {
+		topic->clearUserpicLoops();
+	});
+}
+
 } // namespace Data

Telegram/SourceFiles/data/data_forum_icons.h

@@ -7,6 +7,8 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 */
 #pragma once
 
+#include "base/timer.h"
+
 namespace Main {
 class Session;
 } // namespace Main
@@ -15,6 +17,7 @@ namespace Data {
 
 class DocumentMedia;
 class Session;
+class Forum;
 
 class ForumIcons final {
 public:
@@ -33,8 +36,13 @@ public:
 
 	[[nodiscard]] rpl::producer<> defaultUpdates() const;
 
+	void scheduleUserpicsReset(not_null<Forum*> forum);
+	void clearUserpicsReset(not_null<Forum*> forum);
+
 private:
 	void requestDefault();
+	void resetUserpics();
+	void resetUserpicsFor(not_null<Forum*> forum);
 
 	void updateDefault(const MTPDmessages_stickerSet &data);
 
@@ -45,6 +53,9 @@ private:
 
 	mtpRequestId _defaultRequestId = 0;
 
+	base::flat_map<not_null<Forum*>, crl::time> _resetUserpicsWhen;
+	base::Timer _resetUserpicsTimer;
+
 	rpl::lifetime _lifetime;
 
 };

Telegram/SourceFiles/data/data_forum_topic.cpp

@@ -31,6 +31,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "base/unixtime.h"
 #include "ui/painter.h"
 #include "ui/color_int_conversion.h"
+#include "ui/text/text_custom_emoji.h"
 #include "styles/style_dialogs.h"
 #include "styles/style_chat_helpers.h"
 
@@ -41,6 +42,8 @@ namespace {
 
 using UpdateFlag = TopicUpdate::Flag;
 
+constexpr auto kUserpicLoopsCount = 2;
+
 } // namespace
 
 const base::flat_map<int32, QString> &ForumTopicIcons() {
@@ -544,6 +547,12 @@ void ForumTopic::paintUserpic(
 	}
 }
 
+void ForumTopic::clearUserpicLoops() {
+	if (_icon) {
+		_icon->unload();
+	}
+}
+
 void ForumTopic::validateDefaultIcon() const {
 	if (_defaultIcon.isNull()) {
 		_defaultIcon = ForumTopicIconFrame(
@@ -629,10 +638,12 @@ void ForumTopic::applyIconId(DocumentId iconId) {
 	}
 	_iconId = iconId;
 	_icon = iconId
-		? owner().customEmojiManager().create(
-			_iconId,
-			[=] { updateChatListEntry(); },
-			Data::CustomEmojiManager::SizeTag::Normal)
+		? std::make_unique<Ui::Text::LimitedLoopsEmoji>(
+			owner().customEmojiManager().create(
+				_iconId,
+				[=] { updateChatListEntry(); },
+				Data::CustomEmojiManager::SizeTag::Normal),
+			kUserpicLoopsCount)
 		: nullptr;
 	if (iconId) {
 		_defaultIcon = QImage();

Telegram/SourceFiles/data/data_forum_topic.h

@@ -138,6 +138,7 @@ public:
 		Painter &p,
 		std::shared_ptr<CloudImageView> &view,
 		const Dialogs::Ui::PaintContext &context) const override;
+	void clearUserpicLoops();
 
 	[[nodiscard]] bool isServerSideUnread(
 		not_null<const HistoryItem*> item) const override;

Telegram/SourceFiles/dialogs/dialogs_inner_widget.cpp

@@ -25,6 +25,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "data/data_drafts.h"
 #include "data/data_folder.h"
 #include "data/data_forum.h"
+#include "data/data_forum_icons.h"
 #include "data/data_session.h"
 #include "data/data_channel.h"
 #include "data/data_forum_topic.h"
@@ -428,6 +429,10 @@ void InnerWidget::changeOpenedForum(ChannelData *forum) {
 	_filterId = forum
 		? 0
 		: _controller->activeChatsFilterCurrent();
+	if (const auto old = now ? now->forum() : nullptr) {
+		// If we close it inside forum destruction we should not schedule.
+		old->owner().forumIcons().scheduleUserpicsReset(old);
+	}
 	_openedForum = forum ? forum->forum() : nullptr;
 	_st = forum ? &st::forumTopicRow : &st::defaultDialogRow;