init

Telegram/SourceFiles/data/data_history_messages.h

@@ -0,0 +1,67 @@
+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#pragma once
+
+#include "storage/storage_sparse_ids_list.h"
+
+class History;
+class SparseIdsSlice;
+class SparseIdsMergedSlice;
+
+namespace Data {
+
+struct MessagesSlice;
+struct MessagePosition;
+
+class HistoryMessages final {
+public:
+	void addNew(MsgId messageId);
+	void addExisting(MsgId messageId, MsgRange noSkipRange);
+	void addSlice(
+		std::vector<MsgId> &&messageIds,
+		MsgRange noSkipRange,
+		std::optional<int> count);
+	void removeOne(MsgId messageId);
+	void removeAll();
+	void invalidateBottom();
+
+	[[nodiscard]] Storage::SparseIdsListResult snapshot(
+		const Storage::SparseIdsListQuery &query) const;
+	[[nodiscard]] auto sliceUpdated() const
+		-> rpl::producer<Storage::SparseIdsSliceUpdate>;
+	[[nodiscard]] rpl::producer<MsgId> oneRemoved() const;
+	[[nodiscard]] rpl::producer<> allRemoved() const;
+	[[nodiscard]] rpl::producer<> bottomInvalidated() const;
+
+private:
+	Storage::SparseIdsList _chat;
+	rpl::event_stream<MsgId> _oneRemoved;
+	rpl::event_stream<> _allRemoved;
+	rpl::event_stream<> _bottomInvalidated;
+
+};
+
+[[nodiscard]] rpl::producer<SparseIdsSlice> HistoryViewer(
+	not_null<History*> history,
+	MsgId aroundId,
+	int limitBefore,
+	int limitAfter);
+
+[[nodiscard]] rpl::producer<SparseIdsMergedSlice> HistoryMergedViewer(
+	not_null<History*> history,
+	/*Universal*/MsgId universalAroundId,
+	int limitBefore,
+	int limitAfter);
+
+[[nodiscard]] rpl::producer<MessagesSlice> HistoryMessagesViewer(
+	not_null<History*> history,
+	MessagePosition aroundId,
+	int limitBefore,
+	int limitAfter);
+
+} // namespace Data