From d5dbbd566f342e27d42fecef892364fc35a814d3 Mon Sep 17 00:00:00 2001
From: 23rd <23rd@vivaldi.net>
Date: Thu, 21 Nov 2024 04:46:13 +0300
Subject: [PATCH] Fixed display tags with NoRead flag while history has fake
 unread state.

---
 .../SourceFiles/data/data_chat_filters.cpp    |  6 +++--
 Telegram/SourceFiles/data/data_chat_filters.h |  4 +++-
 .../SourceFiles/dialogs/dialogs_entry.cpp     | 24 +++++++++++++++++++
 .../dialogs/dialogs_inner_widget.cpp          |  6 +++++
 4 files changed, 37 insertions(+), 3 deletions(-)

diff --git a/Telegram/SourceFiles/data/data_chat_filters.cpp b/Telegram/SourceFiles/data/data_chat_filters.cpp
index acc36d10e..e8c5db062 100644
--- a/Telegram/SourceFiles/data/data_chat_filters.cpp
+++ b/Telegram/SourceFiles/data/data_chat_filters.cpp
@@ -283,7 +283,9 @@ const base::flat_set<not_null<History*>> &ChatFilter::never() const {
 	return _never;
 }
 
-bool ChatFilter::contains(not_null<History*> history) const {
+bool ChatFilter::contains(
+		not_null<History*> history,
+		bool ignoreFakeUnread) const {
 	const auto flag = [&] {
 		const auto peer = history->peer;
 		if (const auto user = peer->asUser()) {
@@ -320,7 +322,7 @@ bool ChatFilter::contains(not_null<History*> history) const {
 			&& (!(_flags & Flag::NoRead)
 				|| state.unread
 				|| state.mention
-				|| history->fakeUnreadWhileOpened())
+				|| (!ignoreFakeUnread && history->fakeUnreadWhileOpened()))
 			&& (!(_flags & Flag::NoArchived)
 				|| (history->folderKnown() && !history->folder())))
 		|| _always.contains(history);
diff --git a/Telegram/SourceFiles/data/data_chat_filters.h b/Telegram/SourceFiles/data/data_chat_filters.h
index b18cda973..5f876de24 100644
--- a/Telegram/SourceFiles/data/data_chat_filters.h
+++ b/Telegram/SourceFiles/data/data_chat_filters.h
@@ -81,7 +81,9 @@ public:
 	[[nodiscard]] const std::vector<not_null<History*>> &pinned() const;
 	[[nodiscard]] const base::flat_set<not_null<History*>> &never() const;
 
-	[[nodiscard]] bool contains(not_null<History*> history) const;
+	[[nodiscard]] bool contains(
+		not_null<History*> history,
+		bool ignoreFakeUnread = false) const;
 
 private:
 	FilterId _id = 0;
diff --git a/Telegram/SourceFiles/dialogs/dialogs_entry.cpp b/Telegram/SourceFiles/dialogs/dialogs_entry.cpp
index 81b42c14d..501883a41 100644
--- a/Telegram/SourceFiles/dialogs/dialogs_entry.cpp
+++ b/Telegram/SourceFiles/dialogs/dialogs_entry.cpp
@@ -254,7 +254,31 @@ void Entry::notifyUnreadStateChange(const UnreadState &wasState) {
 			return state.messages || state.marks || state.mentions;
 		};
 		if (isForFilters(wasState) != isForFilters(nowState)) {
+			const auto wasTags = _tagColors.size();
 			owner().chatsFilters().refreshHistory(history);
+
+			// Hack for History::fakeUnreadWhileOpened().
+			if (!isForFilters(nowState)
+				&& (wasTags > 0)
+				&& (wasTags == _tagColors.size())) {
+				auto updateRequested = false;
+				for (const auto &filter : filters.list()) {
+					if (!(filter.flags() & Data::ChatFilter::Flag::NoRead)
+						|| !_chatListLinks.contains(filter.id())
+						|| filter.contains(history, true)) {
+						continue;
+					}
+					const auto wasTagsCount = _tagColors.size();
+					setColorIndexForFilterId(filter.id(), std::nullopt);
+					updateRequested |= (wasTagsCount != _tagColors.size());
+				}
+				if (updateRequested) {
+					updateChatListEntryHeight();
+					session().changes().peerUpdated(
+						history->peer,
+						Data::PeerUpdate::Flag::Name);
+				}
+			}
 		}
 	}
 	updateChatListEntryPostponed();
diff --git a/Telegram/SourceFiles/dialogs/dialogs_inner_widget.cpp b/Telegram/SourceFiles/dialogs/dialogs_inner_widget.cpp
index b9735045a..f3490d7f9 100644
--- a/Telegram/SourceFiles/dialogs/dialogs_inner_widget.cpp
+++ b/Telegram/SourceFiles/dialogs/dialogs_inner_widget.cpp
@@ -803,6 +803,12 @@ void InnerWidget::paintEvent(QPaintEvent *e) {
 					|| (filter.id() == context.filter)) {
 					continue;
 				}
+				if (active
+					&& (filter.flags() & Data::ChatFilter::Flag::NoRead)
+					&& !filter.contains(key.history(), true)) {
+					// Hack for History::fakeUnreadWhileOpened().
+					continue;
+				}
 				if (const auto tag = cacheChatsFilterTag(filter.id(), 0, a)) {
 					if (more) {
 						more++;