110 lines
2.8 KiB
C++
110 lines
2.8 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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#include "dialogs/dialogs_pinned_list.h"
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#include "dialogs/dialogs_key.h"
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#include "dialogs/dialogs_entry.h"
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#include "data/data_session.h"
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namespace Dialogs {
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PinnedList::PinnedList(int limit) : _limit(limit) {
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Expects(limit > 0);
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}
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void PinnedList::setLimit(int limit) {
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Expects(limit > 0);
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if (_limit == limit) {
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return;
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}
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_limit = limit;
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applyLimit(_limit);
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}
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void PinnedList::addPinned(const Key &key) {
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Expects(key.entry()->folderKnown());
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addPinnedGetPosition(key);
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}
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int PinnedList::addPinnedGetPosition(const Key &key) {
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const auto already = ranges::find(_data, key);
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if (already != end(_data)) {
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return already - begin(_data);
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}
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applyLimit(_limit - 1);
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const auto position = int(_data.size());
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_data.push_back(key);
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key.entry()->cachePinnedIndex(position + 1);
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return position;
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}
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void PinnedList::setPinned(const Key &key, bool pinned) {
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Expects(key.entry()->folderKnown());
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if (pinned) {
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const int position = addPinnedGetPosition(key);
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if (position) {
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const auto begin = _data.begin();
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std::rotate(begin, begin + position, begin + position + 1);
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for (auto i = 0; i != position + 1; ++i) {
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_data[i].entry()->cachePinnedIndex(i + 1);
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}
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}
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} else if (const auto it = ranges::find(_data, key); it != end(_data)) {
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const auto index = int(it - begin(_data));
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_data.erase(it);
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key.entry()->cachePinnedIndex(0);
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for (auto i = index, count = int(size(_data)); i != count; ++i) {
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_data[i].entry()->cachePinnedIndex(i + 1);
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}
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}
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}
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void PinnedList::applyLimit(int limit) {
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Expects(limit >= 0);
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while (_data.size() > limit) {
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setPinned(_data.back(), false);
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}
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}
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void PinnedList::clear() {
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applyLimit(0);
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}
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void PinnedList::applyList(
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not_null<Data::Session*> owner,
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const QVector<MTPDialogPeer> &list) {
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clear();
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for (const auto &peer : ranges::view::reverse(list)) {
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peer.match([&](const MTPDdialogPeer &data) {
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if (const auto peerId = peerFromMTP(data.vpeer())) {
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setPinned(owner->history(peerId), true);
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}
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}, [&](const MTPDdialogPeerFolder &data) {
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const auto folderId = data.vfolder_id().v;
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setPinned(owner->folder(folderId), true);
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});
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}
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}
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void PinnedList::reorder(const Key &key1, const Key &key2) {
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const auto index1 = ranges::find(_data, key1) - begin(_data);
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const auto index2 = ranges::find(_data, key2) - begin(_data);
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Assert(index1 >= 0 && index1 < _data.size());
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Assert(index2 >= 0 && index2 < _data.size());
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Assert(index1 != index2);
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std::swap(_data[index1], _data[index2]);
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key1.entry()->cachePinnedIndex(index2 + 1);
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key2.entry()->cachePinnedIndex(index1 + 1);
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}
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} // namespace Dialogs
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