tdesktop/Telegram/SourceFiles/observer_peer.cpp

120 lines
3.3 KiB
C++

/*
This file is part of Telegram Desktop,
the official desktop version of Telegram messaging app, see https://telegram.org
Telegram Desktop is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
It is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
In addition, as a special exception, the copyright holders give permission
to link the code of portions of this program with the OpenSSL library.
Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
*/
#include "observer_peer.h"
#include "core/observer.h"
namespace App {
// Temp forward declaration (while all peer updates are not done through observers).
void emitPeerUpdated();
} // namespace App
namespace Notify {
namespace {
using SmallUpdatesList = QVector<PeerUpdate>;
NeverFreedPointer<SmallUpdatesList> SmallUpdates;
using AllUpdatesList = QMap<PeerData*, PeerUpdate>;
NeverFreedPointer<AllUpdatesList> AllUpdates;
void StartCallback() {
SmallUpdates.createIfNull();
AllUpdates.createIfNull();
}
void FinishCallback() {
SmallUpdates.clear();
AllUpdates.clear();
}
base::Observable<PeerUpdate, PeerUpdatedHandler> PeerUpdatedObservable;
} // namespace
void mergePeerUpdate(PeerUpdate &mergeTo, const PeerUpdate &mergeFrom) {
if (!(mergeTo.flags & PeerUpdate::Flag::NameChanged)) {
if (mergeFrom.flags & PeerUpdate::Flag::NameChanged) {
mergeTo.oldNames = mergeFrom.oldNames;
mergeTo.oldNameFirstChars = mergeFrom.oldNameFirstChars;
}
}
if (mergeFrom.flags & PeerUpdate::Flag::SharedMediaChanged) {
mergeTo.mediaTypesMask |= mergeFrom.mediaTypesMask;
}
mergeTo.flags |= mergeFrom.flags;
}
void peerUpdatedDelayed(const PeerUpdate &update) {
SmallUpdates.createIfNull();
AllUpdates.createIfNull();
Global::RefHandleDelayedPeerUpdates().call();
int existingUpdatesCount = SmallUpdates->size();
for (int i = 0; i < existingUpdatesCount; ++i) {
auto &existingUpdate = (*SmallUpdates)[i];
if (existingUpdate.peer == update.peer) {
mergePeerUpdate(existingUpdate, update);
return;
}
}
if (AllUpdates->isEmpty()) {
if (existingUpdatesCount < 5) {
SmallUpdates->push_back(update);
} else {
AllUpdates->insert(update.peer, update);
}
} else {
auto it = AllUpdates->find(update.peer);
if (it != AllUpdates->cend()) {
mergePeerUpdate(it.value(), update);
return;
}
AllUpdates->insert(update.peer, update);
}
}
void peerUpdatedSendDelayed() {
App::emitPeerUpdated();
if (!SmallUpdates || !AllUpdates || SmallUpdates->empty()) return;
auto smallList = base::take(*SmallUpdates);
auto allList = base::take(*AllUpdates);
for (auto &update : smallList) {
PeerUpdated().notify(std::move(update), true);
}
for (auto &update : allList) {
PeerUpdated().notify(std::move(update), true);
}
if (SmallUpdates->isEmpty()) {
std::swap(smallList, *SmallUpdates);
SmallUpdates->resize(0);
}
}
base::Observable<PeerUpdate, PeerUpdatedHandler> &PeerUpdated() {
return PeerUpdatedObservable;
}
} // namespace Notify