Support basic feed display in chats list.

Telegram/SourceFiles/dialogs/dialogs_entry.h

@@ -0,0 +1,131 @@
+/*
+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 "base/flat_map.h"
+
+#include "dialogs/dialogs_key.h"
+
+namespace Dialogs {
+
+class Row;
+class IndexedList;
+using RowsByLetter = base::flat_map<QChar, not_null<Row*>>;
+
+enum class SortMode {
+	Date = 0x00,
+	Name = 0x01,
+	Add  = 0x02,
+};
+
+enum class Mode {
+	All       = 0x00,
+	Important = 0x01,
+};
+
+struct PositionChange {
+	int movedFrom;
+	int movedTo;
+};
+
+bool MessageIsLess(not_null<HistoryItem*> a, not_null<HistoryItem*> b);
+
+class Entry {
+public:
+	Entry(const Key &key);
+
+	PositionChange adjustByPosInChatList(
+		Mode list,
+		not_null<IndexedList*> indexed);
+	bool inChatList(Mode list) const {
+		return !chatListLinks(list).empty();
+	}
+	int posInChatList(Mode list) const;
+	not_null<Row*> addToChatList(Mode list, not_null<IndexedList*> indexed);
+	void removeFromChatList(Mode list, not_null<IndexedList*> indexed);
+	void removeChatListEntryByLetter(Mode list, QChar letter);
+	void addChatListEntryByLetter(
+		Mode list,
+		QChar letter,
+		not_null<Row*> row);
+	void updateChatListEntry() const;
+	bool isPinnedDialog() const {
+		return _pinnedIndex > 0;
+	}
+	void cachePinnedIndex(int index);
+	uint64 sortKeyInChatList() const {
+		return _sortKeyInChatList;
+	}
+	void updateChatListSortPosition();
+	void setChatsListDate(const QDateTime &date);
+
+	virtual bool toImportant() const = 0;
+
+	virtual bool needUpdateInChatList() const {
+		return true;
+	}
+
+	virtual int chatListUnreadCount() const = 0;
+	virtual bool chatListMutedBadge() const = 0;
+	virtual HistoryItem *chatsListItem() const = 0;
+
+	virtual void loadUserpic() = 0;
+	virtual void paintUserpic(
+		Painter &p,
+		int x,
+		int y,
+		int size) const = 0;
+	void paintUserpicLeft(
+			Painter &p,
+			int x,
+			int y,
+			int w,
+			int size) const {
+		paintUserpic(p, rtl() ? (w - x - size) : x, y, size);
+	}
+
+	QDateTime chatsListDate() const {
+		return _lastMessageDate;
+	}
+
+	virtual ~Entry() = default;
+
+	mutable const HistoryItem *textCachedFor = nullptr; // cache
+	mutable Text lastItemTextCache;
+
+private:
+	virtual QDateTime adjustChatListDate() const {
+		return chatsListDate();
+	}
+	virtual void removeDialog();
+	virtual void changedInChatListHook(Dialogs::Mode list, bool added) {
+	}
+	virtual void changedChatListPinHook() {
+	}
+
+	RowsByLetter &chatListLinks(Mode list) {
+		return _chatListLinks[static_cast<int>(list)];
+	}
+	const RowsByLetter &chatListLinks(Mode list) const {
+		return _chatListLinks[static_cast<int>(list)];
+	}
+	Row *mainChatListLink(Mode list) const {
+		auto it = chatListLinks(list).find(0);
+		Assert(it != chatListLinks(list).cend());
+		return it->second;
+	}
+
+	Dialogs::Key _key;
+	RowsByLetter _chatListLinks[2];
+	uint64 _sortKeyInChatList = 0;
+	int _pinnedIndex = 0;
+	QDateTime _lastMessageDate;
+
+};
+
+} // namespace Dialogs