Added sponsored messages to HistoryWidget.

Telegram/SourceFiles/history/history.cpp

@@ -2675,6 +2675,10 @@ QString History::topPromotionMessage() const {
 	return _topPromotedMessage;
 }
 
+bool History::canHaveSponsoredMessages() const {
+	return isChannel();
+}
+
 bool History::clearUnreadOnClientSide() const {
 	if (!session().supportMode()) {
 		return false;

Telegram/SourceFiles/history/history.h

@@ -282,6 +282,8 @@ public:
 	[[nodiscard]] bool topPromotionAboutShown() const;
 	void markTopPromotionAboutShown();
 
+	[[nodiscard]] bool canHaveSponsoredMessages() const;
+
 	MsgId minMsgId() const;
 	MsgId maxMsgId() const;
 	MsgId msgIdForRead() const;

Telegram/SourceFiles/history/history_widget.cpp

@@ -56,6 +56,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "data/data_user.h"
 #include "data/data_chat_filters.h"
 #include "data/data_scheduled_messages.h"
+#include "data/data_sponsored_messages.h"
 #include "data/data_file_origin.h"
 #include "data/data_histories.h"
 #include "data/data_group_call.h"
@@ -109,6 +110,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "ui/chat/group_call_bar.h"
 #include "ui/chat/chat_theme.h"
 #include "ui/chat/chat_style.h"
+#include "ui/chat/continuous_scroll.h"
 #include "ui/widgets/popup_menu.h"
 #include "ui/item_text_options.h"
 #include "ui/unread_badge.h"
@@ -260,6 +262,14 @@ HistoryWidget::HistoryWidget(
 	) | rpl::start_with_next(crl::guard(_list, [=] {
 		_list->onParentGeometryChanged();
 	}), lifetime());
+	_scroll->addContentRequests(
+	) | rpl::start_with_next([=] {
+		if (_history->loadedAtBottom()
+			&& session().data().sponsoredMessages().append(_history)) {
+			_scroll->contentAdded();
+		}
+	}, lifetime());
+
 	_historyDown->addClickHandler([=] { historyDownClicked(); });
 	_unreadMentions->addClickHandler([=] { showNextUnreadMention(); });
 	_fieldBarCancel->addClickHandler([=] { cancelFieldAreaState(); });
@@ -1966,6 +1976,8 @@ void HistoryWidget::showHistory(
 				}
 			}
 			return;
+		} else {
+			session().data().sponsoredMessages().clearItems(_history);
 		}
 		session().sendProgressManager().update(
 			_history,
@@ -2169,6 +2181,14 @@ void HistoryWidget::showHistory(
 		}
 		unreadCountUpdated(); // set _historyDown badge.
 		showAboutTopPromotion();
+
+		{
+			const auto hasSponsored = _history->canHaveSponsoredMessages();
+			_scroll->setTrackingContent(hasSponsored);
+			if (hasSponsored) {
+				session().data().sponsoredMessages().request(_history);
+			}
+		}
 	} else {
 		_chooseForReport = nullptr;
 		refreshTopBarActiveChat();
@@ -2616,6 +2636,16 @@ void HistoryWidget::newItemAdded(not_null<HistoryItem*> item) {
 		|| item->isScheduled()) {
 		return;
 	}
+	if (item->isSponsored()) {
+		if (const auto view = item->mainView()) {
+			view->resizeGetHeight(width());
+			updateHistoryGeometry(
+				false,
+				true,
+				{ ScrollChangeNoJumpToBottom, 0 });
+		}
+		return;
+	}
 
 	// If we get here in non-resized state we can't rely on results of
 	// doWeReadServerHistory() and mark chat as read.

Telegram/SourceFiles/history/history_widget.h

@@ -80,6 +80,7 @@ namespace Toast {
 class Instance;
 } // namespace Toast
 class ChooseThemeController;
+class ContinuousScroll;
 } // namespace Ui
 
 namespace Window {
@@ -675,7 +676,7 @@ private:
 	int _delayedShowAtRequest = 0; // Not real mtpRequestId.
 
 	object_ptr<HistoryView::TopBarWidget> _topBar;
-	object_ptr<Ui::ScrollArea> _scroll;
+	object_ptr<Ui::ContinuousScroll> _scroll;
 	QPointer<HistoryInner> _list;
 	History *_migrated = nullptr;
 	History *_history = nullptr;