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lib/mpris2/lockscreenwatcher.cpp
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1 | /* | ||||
---|---|---|---|---|---|
2 | Gwenview: an image viewer | ||||
3 | Copyright 2013 Martin Gräßlin <mgraesslin@kde.org> | ||||
4 | Copyright 2018 Friedrich W. H. Kossebau <kossebau@kde.org> | ||||
5 | | ||||
6 | This program is free software; you can redistribute it and/or | ||||
7 | modify it under the terms of the GNU General Public License | ||||
8 | as published by the Free Software Foundation; either version 2 | ||||
9 | of the License, or (at your option) any later version. | ||||
10 | | ||||
11 | This program is distributed in the hope that it will be useful, | ||||
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | ||||
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||||
14 | GNU General Public License for more details. | ||||
15 | | ||||
16 | You should have received a copy of the GNU General Public License | ||||
17 | along with this program; if not, write to the Free Software | ||||
18 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. | ||||
19 | */ | ||||
20 | | ||||
21 | #include "lockscreenwatcher.h" | ||||
22 | | ||||
23 | // lib | ||||
24 | #include <screensaverdbusinterface.h> | ||||
25 | // Qt | ||||
26 | #include <QDBusServiceWatcher> | ||||
27 | #include <QFutureWatcher> | ||||
28 | #include <QtConcurrentRun> | ||||
29 | | ||||
30 | namespace Gwenview | ||||
31 | { | ||||
32 | | ||||
33 | using DBusBoolReplyWatcher = QFutureWatcher<QDBusReply<bool>>; | ||||
34 | using DBusStringReplyWatcher = QFutureWatcher<QDBusReply<QString>>; | ||||
35 | | ||||
36 | inline QString screenSaverServiceName() { return QStringLiteral("org.freedesktop.ScreenSaver"); } | ||||
37 | | ||||
38 | | ||||
39 | LockScreenWatcher::LockScreenWatcher(QObject *parent) | ||||
40 | : QObject(parent) | ||||
41 | , mScreenSaverInterface(nullptr) | ||||
42 | , mLocked(false) | ||||
43 | { | ||||
44 | QDBusServiceWatcher *screenLockServiceWatcher = new QDBusServiceWatcher(this); | ||||
45 | connect(screenLockServiceWatcher, &QDBusServiceWatcher::serviceOwnerChanged, | ||||
46 | this, &LockScreenWatcher::onScreenSaverServiceOwnerChanged); | ||||
47 | screenLockServiceWatcher->setWatchMode(QDBusServiceWatcher::WatchForOwnerChange); | ||||
48 | screenLockServiceWatcher->addWatchedService(screenSaverServiceName()); | ||||
49 | | ||||
50 | DBusBoolReplyWatcher *watcher = new DBusBoolReplyWatcher(this); | ||||
51 | connect(watcher, &DBusBoolReplyWatcher::finished, | ||||
52 | this, &LockScreenWatcher::onServiceRegisteredQueried); | ||||
53 | connect(watcher, &DBusBoolReplyWatcher::canceled, | ||||
54 | watcher, &DBusBoolReplyWatcher::deleteLater); | ||||
55 | | ||||
56 | watcher->setFuture(QtConcurrent::run(QDBusConnection::sessionBus().interface(), | ||||
57 | &QDBusConnectionInterface::isServiceRegistered, | ||||
58 | screenSaverServiceName())); | ||||
59 | } | ||||
60 | | ||||
61 | LockScreenWatcher::~LockScreenWatcher() = default; | ||||
62 | | ||||
63 | bool LockScreenWatcher::isLocked() const | ||||
64 | { | ||||
65 | return mLocked; | ||||
66 | } | ||||
67 | | ||||
68 | void LockScreenWatcher::onScreenSaverServiceOwnerChanged(const QString &serviceName, | ||||
69 | const QString &oldOwner, const QString &newOwner) | ||||
70 | { | ||||
71 | Q_UNUSED(oldOwner) | ||||
72 | | ||||
73 | if (serviceName != screenSaverServiceName()) { | ||||
74 | return; | ||||
75 | } | ||||
76 | | ||||
77 | delete mScreenSaverInterface; | ||||
78 | mScreenSaverInterface = nullptr; | ||||
79 | | ||||
80 | if (!newOwner.isEmpty()) { | ||||
81 | mScreenSaverInterface = new OrgFreedesktopScreenSaverInterface(newOwner, QStringLiteral("/ScreenSaver"), | ||||
82 | QDBusConnection::sessionBus(), this); | ||||
83 | connect(mScreenSaverInterface, &OrgFreedesktopScreenSaverInterface::ActiveChanged, | ||||
84 | this, &LockScreenWatcher::onScreenSaverActiveChanged); | ||||
85 | | ||||
86 | QDBusPendingCallWatcher *watcher = new QDBusPendingCallWatcher(mScreenSaverInterface->GetActive(), this); | ||||
87 | connect(watcher, &QDBusPendingCallWatcher::finished, | ||||
88 | this, &LockScreenWatcher::onActiveQueried); | ||||
89 | } else { | ||||
90 | if (mLocked) { | ||||
91 | // reset | ||||
92 | mLocked = false; | ||||
93 | emit isLockedChanged(mLocked); | ||||
94 | } | ||||
95 | } | ||||
96 | } | ||||
97 | | ||||
98 | void LockScreenWatcher::onServiceRegisteredQueried() | ||||
99 | { | ||||
100 | DBusBoolReplyWatcher *watcher = dynamic_cast<DBusBoolReplyWatcher*>(sender()); | ||||
101 | if (!watcher) { | ||||
102 | return; | ||||
103 | } | ||||
104 | | ||||
105 | const QDBusReply<bool> &reply = watcher->result(); | ||||
106 | | ||||
107 | if (reply.isValid() && reply.value()) { | ||||
108 | DBusStringReplyWatcher *ownerWatcher = new DBusStringReplyWatcher(this); | ||||
109 | connect(ownerWatcher, &DBusStringReplyWatcher::finished, | ||||
110 | this, &LockScreenWatcher::onServiceOwnerQueried); | ||||
111 | connect(ownerWatcher, &DBusStringReplyWatcher::canceled, | ||||
112 | ownerWatcher, &DBusStringReplyWatcher::deleteLater); | ||||
113 | ownerWatcher->setFuture(QtConcurrent::run(QDBusConnection::sessionBus().interface(), | ||||
114 | &QDBusConnectionInterface::serviceOwner, | ||||
115 | screenSaverServiceName())); | ||||
116 | } | ||||
117 | | ||||
118 | watcher->deleteLater(); | ||||
119 | } | ||||
120 | | ||||
121 | void LockScreenWatcher::onServiceOwnerQueried() | ||||
122 | { | ||||
123 | DBusStringReplyWatcher *watcher = dynamic_cast<DBusStringReplyWatcher*>(sender()); | ||||
124 | if (!watcher) { | ||||
125 | return; | ||||
126 | } | ||||
127 | | ||||
128 | const QDBusReply<QString> reply = watcher->result(); | ||||
129 | | ||||
130 | if (reply.isValid()) { | ||||
131 | onScreenSaverServiceOwnerChanged(screenSaverServiceName(), QString(), reply.value()); | ||||
132 | } | ||||
133 | | ||||
134 | watcher->deleteLater(); | ||||
135 | } | ||||
136 | | ||||
137 | void LockScreenWatcher::onActiveQueried(QDBusPendingCallWatcher *watcher) | ||||
138 | { | ||||
139 | QDBusPendingReply<bool> reply = *watcher; | ||||
140 | if (!reply.isError()) { | ||||
141 | onScreenSaverActiveChanged(reply.value()); | ||||
142 | } | ||||
143 | | ||||
144 | watcher->deleteLater(); | ||||
145 | } | ||||
146 | | ||||
147 | void LockScreenWatcher::onScreenSaverActiveChanged(bool isActive) | ||||
148 | { | ||||
149 | if (mLocked == isActive) { | ||||
150 | return; | ||||
151 | } | ||||
152 | | ||||
153 | mLocked = isActive; | ||||
154 | | ||||
155 | emit isLockedChanged(mLocked); | ||||
156 | } | ||||
157 | | ||||
158 | } |