Differential D10972 Diff 29554 lib/mpris2/mpris2service.cpp

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lib/mpris2/mpris2service.cpp

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		1		/*
		2		Gwenview: an image viewer
		3		Copyright 2018 Friedrich W. H. Kossebau <kossebau@kde.org>
		4
		5		This program is free software; you can redistribute it and/or
		6		modify it under the terms of the GNU General Public License
		7		as published by the Free Software Foundation; either version 2
		8		of the License, or (at your option) any later version.
		9
		10		This program is distributed in the hope that it will be useful,
		11		but WITHOUT ANY WARRANTY; without even the implied warranty of
		12		MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		13		GNU General Public License for more details.
		14
		15		You should have received a copy of the GNU General Public License
		16		along with this program; if not, write to the Free Software
		17		Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
		18		*/
		19
		20		#include "mpris2service.h"
		21
		22		// lib
		23		#include "lockscreenwatcher.h"
		24		#include "mprismediaplayer2.h"
		25		#include "mprismediaplayer2player.h"
		26		#include <slideshow.h>
		27		// Qt
		28		#include <QDBusConnection>
		29		// std
		30		#include <unistd.h>
		31
		32		namespace Gwenview
		33		{
		34
		35		inline QString mediaPlayer2ObjectPath() { return QStringLiteral("/org/mpris/MediaPlayer2"); }
		36
		37
		38		Mpris2Service::Mpris2Service(SlideShow* slideShow, ContextManager* contextManager,
		39		QAction* toggleSlideShowAction, QAction* fullScreenAction,
		40		QAction* previousAction, QAction* nextAction,
		41		QObject* parent)
		42		: QObject(parent)
		43		{
		44		new MprisMediaPlayer2(mediaPlayer2ObjectPath(), fullScreenAction, this);
		45		new MprisMediaPlayer2Player(mediaPlayer2ObjectPath(), slideShow, contextManager,
		46		toggleSlideShowAction, fullScreenAction, previousAction, nextAction,
		47		this);
		48
		49		// To avoid appearing in the media controller on the lock screen,
		50		// which might be not expected or wanted for Gwenview,
		51		// the MPRIS service is unregistered while the lockscreen is active.
		52		LockScreenWatcher *lockScreenWatcher = new LockScreenWatcher(this);
		53		connect(lockScreenWatcher, &LockScreenWatcher::isLockedChanged,
		54		this, &Mpris2Service::onLockScreenLockedChanged);
		55
		56		if (!lockScreenWatcher->isLocked()) {
		57		registerOnDBus();
		58		}
		59		}
		60
		61		Mpris2Service::~Mpris2Service()
		62		{
		63		unregisterOnDBus();
		64		}
		65
		66		void Mpris2Service::registerOnDBus()
		67		{
		68		QDBusConnection sessionBus = QDBusConnection::sessionBus();
		69
		70		// try to register MPRIS presentation object
		71		// to be done before registering the service name, so it is already present
		72		// when controllers react to the service name having appeared
		73		const bool objectRegistered = sessionBus.registerObject(mediaPlayer2ObjectPath(), this, QDBusConnection::ExportAdaptors);
		74
		75		// try to register MPRIS presentation service
		76		if (objectRegistered) {
		77		mMpris2ServiceName = QStringLiteral("org.mpris.MediaPlayer2.Gwenview");
		78
		79		bool serviceRegistered = QDBusConnection::sessionBus().registerService(mMpris2ServiceName);
		80
		81		// Perhaps not the first instance? Try again with another name, as specified by MPRIS2 spec:
		82		if (!serviceRegistered) {
		83		mMpris2ServiceName = mMpris2ServiceName + QLatin1String(".instance") + QString::number(getpid());
		84		serviceRegistered = QDBusConnection::sessionBus().registerService(mMpris2ServiceName);
		85		}
		86		if (!serviceRegistered) {
		87		mMpris2ServiceName.clear();
		88		sessionBus.unregisterObject(mediaPlayer2ObjectPath());
		89		}
		90		}
		91		}
		92
		93		void Mpris2Service::unregisterOnDBus()
		94		{
		95		if (mMpris2ServiceName.isEmpty()) {
		96		return;
		97		}
		98
		99		QDBusConnection sessionBus = QDBusConnection::sessionBus();
		100		sessionBus.unregisterService(mMpris2ServiceName);
		101		sessionBus.unregisterObject(mediaPlayer2ObjectPath());
		102		}
		103
		104		void Mpris2Service::onLockScreenLockedChanged(bool isLocked)
		105		{
		106		if (isLocked) {
		107		unregisterOnDBus();
		108		} else {
		109		registerOnDBus();
		110		}
		111		}
		112
		113		}