62 lines
1.3 KiB
C++
62 lines
1.3 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop application for the Telegram messaging service.
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For license and copyright information please follow this link:
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https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
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*/
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#pragma once
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#include "history/view/history_view_pinned_bar.h"
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class History;
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namespace Data {
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enum class LoadDirection : char;
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} // namespace Data
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namespace HistoryView {
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class PinnedTracker final {
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public:
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using UniversalMsgId = MsgId;
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explicit PinnedTracker(not_null<History*> history);
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~PinnedTracker();
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[[nodiscard]] rpl::producer<PinnedId> shownMessageId() const;
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[[nodiscard]] PinnedId currentMessageId() const;
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void trackAround(UniversalMsgId messageId);
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void reset();
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[[nodiscard]] rpl::lifetime &lifetime() {
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return _lifetime;
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}
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private:
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struct Slice {
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std::vector<FullMsgId> ids;
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std::optional<int> fullCount;
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std::optional<int> skippedBefore;
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std::optional<int> skippedAfter;
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};
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void clear();
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void refreshViewer();
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void refreshCurrentFromSlice();
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const not_null<History*> _history;
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PeerData *_migratedPeer = nullptr;
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rpl::variable<PinnedId> _current;
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rpl::lifetime _dataLifetime;
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UniversalMsgId _aroundId = 0;
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UniversalMsgId _viewerAroundId = 0;
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Slice _slice;
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rpl::lifetime _lifetime;
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};
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} // namespace HistoryView
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