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transmission/qt/DBusInteropHelper.cc
Charles Kerr 1f28470cf4
chore: prefer QStringLiteral (#1284)
Further reading:
* https://forum.qt.io/topic/78540/qstringliteral-vs-qlatin1string/2
* https://woboq.com/blog/qstringliteral.html
* https://www.qt.io/blog/2014/06/13/qt-weekly-13-qstringliteral

tl;dr: QLatin1Literal uses less memory than QStringLiteral; however,
since most Qt APIs require a QString argument, there's extra runtime
cost of converting QLatin1Strings to QStrings. QStringLiteral uses a
little more memory but constructs its QStrings at compile time.

ok, the `prefer-qstringliteral` branch is getting out of control: the
secondary goal of fixing a .clang-tidy issue is causing more diffs
than the primary goal. So, I'm breaking it into two separate PRs.
2020-05-29 12:40:07 -05:00

62 lines
1.6 KiB
C++

/*
* This file Copyright (C) 2015 Mnemosyne LLC
*
* It may be used under the GNU GPL versions 2 or 3
* or any future license endorsed by Mnemosyne LLC.
*
*/
#include <iostream>
#include <QDBusConnection>
#include <QDBusMessage>
#include <QDBusReply>
#include <QString>
#include <QVariant>
#include "DBusInteropHelper.h"
#include "InteropObject.h"
namespace
{
auto const DBUS_SERVICE = QStringLiteral("com.transmissionbt.Transmission");
auto const DBUS_OBJECT_PATH = QStringLiteral("/com/transmissionbt/Transmission");
auto const DBUS_INTERFACE = QStringLiteral("com.transmissionbt.Transmission");
} // namespace
bool DBusInteropHelper::isConnected() const
{
return QDBusConnection::sessionBus().isConnected();
}
QVariant DBusInteropHelper::addMetainfo(QString const& metainfo)
{
QDBusMessage request = QDBusMessage::createMethodCall(DBUS_SERVICE, DBUS_OBJECT_PATH, DBUS_INTERFACE,
QStringLiteral("AddMetainfo"));
request.setArguments(QVariantList() << metainfo);
QDBusReply<bool> const response = QDBusConnection::sessionBus().call(request);
return response.isValid() ? QVariant(response.value()) : QVariant();
}
void DBusInteropHelper::registerObject(QObject* parent)
{
QDBusConnection bus = QDBusConnection::sessionBus();
if (!bus.isConnected())
{
return;
}
if (!bus.registerService(DBUS_SERVICE))
{
std::cerr << "couldn't register " << qPrintable(DBUS_SERVICE) << std::endl;
}
if (!bus.registerObject(DBUS_OBJECT_PATH, new InteropObject(parent), QDBusConnection::ExportAllSlots))
{
std::cerr << "couldn't register " << qPrintable(DBUS_OBJECT_PATH) << std::endl;
}
}