From 8af559e711a778d1861d39bfb9b595e8b28f4a5b Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Wed, 16 Sep 2020 11:25:57 +0300
Subject: [PATCH] Use first message of album as the leader.

---
 Telegram/SourceFiles/data/data_session.cpp                    | 2 +-
 Telegram/SourceFiles/history/history_item.cpp                 | 2 +-
 Telegram/SourceFiles/history/history_widget.cpp               | 4 ++--
 Telegram/SourceFiles/history/view/history_view_element.cpp    | 2 +-
 .../SourceFiles/history/view/history_view_list_widget.cpp     | 4 ++--
 5 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/Telegram/SourceFiles/data/data_session.cpp b/Telegram/SourceFiles/data/data_session.cpp
index cde9558783..836ed9f486 100644
--- a/Telegram/SourceFiles/data/data_session.cpp
+++ b/Telegram/SourceFiles/data/data_session.cpp
@@ -1234,7 +1234,7 @@ void Session::notifyItemIdChange(IdChange event) {
 	};
 	enumerateItemViews(item, refreshViewDataId);
 	if (const auto group = groups().find(item)) {
-		const auto leader = group->items.back();
+		const auto leader = group->items.front();
 		if (leader != item) {
 			enumerateItemViews(leader, refreshViewDataId);
 		}
diff --git a/Telegram/SourceFiles/history/history_item.cpp b/Telegram/SourceFiles/history/history_item.cpp
index 76ebd7e3b6..845de23f6b 100644
--- a/Telegram/SourceFiles/history/history_item.cpp
+++ b/Telegram/SourceFiles/history/history_item.cpp
@@ -199,7 +199,7 @@ void HistoryItem::finishEdition(int oldKeyboardTop) {
 	_history->owner().requestItemViewRefresh(this);
 	invalidateChatListEntry();
 	if (const auto group = _history->owner().groups().find(this)) {
-		const auto leader = group->items.back();
+		const auto leader = group->items.front();
 		if (leader != this) {
 			_history->owner().requestItemViewRefresh(leader);
 			leader->invalidateChatListEntry();
diff --git a/Telegram/SourceFiles/history/history_widget.cpp b/Telegram/SourceFiles/history/history_widget.cpp
index 117b71f676..34285e6d3c 100644
--- a/Telegram/SourceFiles/history/history_widget.cpp
+++ b/Telegram/SourceFiles/history/history_widget.cpp
@@ -930,7 +930,7 @@ void HistoryWidget::scrollToAnimationCallback(
 void HistoryWidget::enqueueMessageHighlight(
 		not_null<HistoryView::Element*> view) {
 	if (const auto group = session().data().groups().find(view->data())) {
-		if (const auto leader = group->items.back()->mainView()) {
+		if (const auto leader = group->items.front()->mainView()) {
 			view = leader;
 		}
 	}
@@ -1020,7 +1020,7 @@ void HistoryWidget::clearHighlightMessages() {
 int HistoryWidget::itemTopForHighlight(
 		not_null<HistoryView::Element*> view) const {
 	if (const auto group = session().data().groups().find(view->data())) {
-		if (const auto leader = group->items.back()->mainView()) {
+		if (const auto leader = group->items.front()->mainView()) {
 			view = leader;
 		}
 	}
diff --git a/Telegram/SourceFiles/history/view/history_view_element.cpp b/Telegram/SourceFiles/history/view/history_view_element.cpp
index f8f0073b28..53b984c110 100644
--- a/Telegram/SourceFiles/history/view/history_view_element.cpp
+++ b/Telegram/SourceFiles/history/view/history_view_element.cpp
@@ -358,7 +358,7 @@ void Element::refreshMedia(Element *replacing) {
 	const auto media = item->media();
 	if (media && media->canBeGrouped()) {
 		if (const auto group = history()->owner().groups().find(item)) {
-			if (group->items.back() != item) {
+			if (group->items.front() != item) {
 				_media = nullptr;
 				_flags |= Flag::HiddenByGroup;
 			} else {
diff --git a/Telegram/SourceFiles/history/view/history_view_list_widget.cpp b/Telegram/SourceFiles/history/view/history_view_list_widget.cpp
index ae5a2a2d2f..9f413fdb38 100644
--- a/Telegram/SourceFiles/history/view/history_view_list_widget.cpp
+++ b/Telegram/SourceFiles/history/view/history_view_list_widget.cpp
@@ -371,7 +371,7 @@ std::optional<int> ListWidget::scrollTopForView(
 		not_null<Element*> view) const {
 	if (view->isHiddenByGroup()) {
 		if (const auto group = session().data().groups().find(view->data())) {
-			if (const auto leader = viewForItem(group->items.back())) {
+			if (const auto leader = viewForItem(group->items.front())) {
 				if (!leader->isHiddenByGroup()) {
 					return scrollTopForView(leader);
 				}
@@ -1371,7 +1371,7 @@ TextSelection ListWidget::computeRenderSelection(
 	};
 	const auto item = view->data();
 	if (const auto group = session().data().groups().find(item)) {
-		if (group->items.back() != item) {
+		if (group->items.front() != item) {
 			return TextSelection();
 		}
 		auto result = TextSelection();