From c796dd142b9e7a5aa5fe7fa13355a213f8f82102 Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Tue, 28 Jun 2022 17:46:31 +0400
Subject: [PATCH] Optimize many animated emoji repaint requests.

---
 Telegram/SourceFiles/history/history_item.cpp              | 7 +++++++
 Telegram/SourceFiles/history/history_item.h                | 2 ++
 Telegram/SourceFiles/history/history_message.cpp           | 3 +--
 Telegram/SourceFiles/history/view/history_view_message.cpp | 1 +
 4 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/Telegram/SourceFiles/history/history_item.cpp b/Telegram/SourceFiles/history/history_item.cpp
index 05a46a5b8..c099b7e20 100644
--- a/Telegram/SourceFiles/history/history_item.cpp
+++ b/Telegram/SourceFiles/history/history_item.cpp
@@ -375,6 +375,13 @@ void HistoryItem::invalidateChatListEntry() {
 	history()->lastItemDialogsView.itemInvalidated(this);
 }
 
+void HistoryItem::customEmojiRepaint() {
+	if (!_textRepaintScheduled) {
+		_textRepaintScheduled = true;
+		history()->owner().requestItemRepaint(this);
+	}
+}
+
 void HistoryItem::finishEditionToEmpty() {
 	finishEdition(-1);
 	_history->itemVanished(this);
diff --git a/Telegram/SourceFiles/history/history_item.h b/Telegram/SourceFiles/history/history_item.h
index 98f9430f6..658400f4a 100644
--- a/Telegram/SourceFiles/history/history_item.h
+++ b/Telegram/SourceFiles/history/history_item.h
@@ -463,6 +463,7 @@ protected:
 	MessageFlags _flags = 0;
 
 	void invalidateChatListEntry();
+	void customEmojiRepaint();
 
 	void setGroupId(MessageGroupId groupId);
 
@@ -473,6 +474,7 @@ protected:
 	Ui::Text::String _text = { st::msgMinWidth };
 	int _textWidth = -1;
 	int _textHeight = 0;
+	bool _textRepaintScheduled = false;
 
 	struct SavedMediaData {
 		TextWithEntities text;
diff --git a/Telegram/SourceFiles/history/history_message.cpp b/Telegram/SourceFiles/history/history_message.cpp
index 8c66affd4..7b4f89409 100644
--- a/Telegram/SourceFiles/history/history_message.cpp
+++ b/Telegram/SourceFiles/history/history_message.cpp
@@ -1498,8 +1498,7 @@ void HistoryMessage::setText(const TextWithEntities &textWithEntities) {
 	clearIsolatedEmoji();
 	const auto context = Core::MarkedTextContext{
 		.session = &history()->session(),
-		.customEmojiRepaint = [=] {
-			history()->owner().requestItemRepaint(this); },
+		.customEmojiRepaint = [=] { customEmojiRepaint(); },
 	};
 	_text.setMarkedText(
 		st::messageTextStyle,
diff --git a/Telegram/SourceFiles/history/view/history_view_message.cpp b/Telegram/SourceFiles/history/view/history_view_message.cpp
index d41f5352a..455178af0 100644
--- a/Telegram/SourceFiles/history/view/history_view_message.cpp
+++ b/Telegram/SourceFiles/history/view/history_view_message.cpp
@@ -1258,6 +1258,7 @@ void Message::paintText(
 		0,
 		-1,
 		context.selection);
+	item->_textRepaintScheduled = false;
 	if (!_heavyCustomEmoji && custom) {
 		_heavyCustomEmoji = true;
 		history()->owner().registerHeavyViewPart(const_cast<Message*>(this));