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Telegram/SourceFiles/info/media/info_media_common.cpp

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+/*
+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
+*/
+#include "info/media/info_media_common.h"
+
+#include "history/history_item.h"
+#include "storage/storage_shared_media.h"
+#include "styles/style_info.h"
+#include "styles/style_overview.h"
+
+namespace Info::Media {
+
+UniversalMsgId GetUniversalId(FullMsgId itemId) {
+	return peerIsChannel(itemId.peer)
+		? UniversalMsgId(itemId.msg)
+		: UniversalMsgId(itemId.msg - ServerMaxMsgId);
+}
+
+UniversalMsgId GetUniversalId(not_null<const HistoryItem*> item) {
+	return GetUniversalId(item->fullId());
+}
+
+UniversalMsgId GetUniversalId(not_null<const BaseLayout*> layout) {
+	return GetUniversalId(layout->getItem()->fullId());
+}
+
+bool ChangeItemSelection(
+		ListSelectedMap &selected,
+		not_null<const HistoryItem*> item,
+		ListItemSelectionData selectionData,
+		int limit) {
+	if (!limit) {
+		limit = MaxSelectedItems;
+	}
+	const auto changeExisting = [&](auto it) {
+		if (it == selected.cend()) {
+			return false;
+		} else if (it->second != selectionData) {
+			it->second = selectionData;
+			return true;
+		}
+		return false;
+	};
+	if (selected.size() < limit) {
+		const auto &[i, ok] = selected.try_emplace(item, selectionData);
+		if (ok) {
+			return true;
+		}
+		return changeExisting(i);
+	}
+	return changeExisting(selected.find(item));
+}
+
+int MinItemHeight(Type type, int width) {
+	auto &songSt = st::overviewFileLayout;
+
+	switch (type) {
+	case Type::Photo:
+	case Type::GIF:
+	case Type::Video:
+	case Type::RoundFile: {
+		auto itemsLeft = st::infoMediaSkip;
+		auto itemsInRow = (width - itemsLeft)
+			/ (st::infoMediaMinGridSize + st::infoMediaSkip);
+		return (st::infoMediaMinGridSize + st::infoMediaSkip) / itemsInRow;
+	} break;
+
+	case Type::RoundVoiceFile:
+		return songSt.songPadding.top()
+			+ songSt.songThumbSize
+			+ songSt.songPadding.bottom()
+			+ st::lineWidth;
+	case Type::File:
+		return songSt.filePadding.top()
+			+ songSt.fileThumbSize
+			+ songSt.filePadding.bottom()
+			+ st::lineWidth;
+	case Type::MusicFile:
+		return songSt.songPadding.top()
+			+ songSt.songThumbSize
+			+ songSt.songPadding.bottom();
+	case Type::Link:
+		return st::linksPhotoSize
+			+ st::linksMargin.top()
+			+ st::linksMargin.bottom()
+			+ st::linksBorder;
+	}
+	Unexpected("Type in MinItemHeight()");
+}
+} // namespace Info::Media