workspace/powerdevil/daemon/SuspensionLockHandler.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2008 by Dario Freddi <drf@kdemod.ath.cx>                *
   3  *   Copyright (C) 2008 by Kevin Ottens <ervin@kde.org>                    *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (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                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA .        *
  19  ***************************************************************************/
  20
  21 #include "SuspensionLockHandler.h"
  22
  23 #include <KDebug>
  24 #include <klocalizedstring.h>
  25
  26 SuspensionLockHandler::SuspensionLockHandler(QObject *parent)
  27         : QObject(parent),
  28         m_isJobOngoing(false),
  29         m_isOnNotification(false),
  30         m_latestInhibitCookie(0)
  31 {
  32 }
  33
  34 SuspensionLockHandler::~SuspensionLockHandler()
  35 {
  36 }
  37
  38 bool SuspensionLockHandler::canStartSuspension(bool automated)
  39 {
  40     if (automated) {
  41         if (hasInhibit(true)) {
  42             return false;
  43         }
  44     }
  45
  46     return !m_isJobOngoing;
  47 }
  48
  49 bool SuspensionLockHandler::canStartNotification(bool automated)
  50 {
  51     if (automated) {
  52         if (hasInhibit(true)) {
  53             return false;
  54         }
  55     }
  56
  57     if (!m_isJobOngoing && !m_isOnNotification) {
  58         return true;
  59     } else {
  60         return false;
  61     }
  62 }
  63
  64 bool SuspensionLockHandler::hasInhibit(bool notify)
  65 {
  66     if (m_inhibitRequests.isEmpty()) {
  67         return false;
  68     } else {
  69         kDebug() << "Inhibition detected!!";
  70         // TODO: uhm... maybe a better notification here?
  71         if (notify) {
  72             emit streamCriticalNotification("inhibition", i18n("The application %1 "
  73                                             "is inhibiting suspension for the following reason:\n%2",
  74                                             m_inhibitRequests[m_latestInhibitCookie].application,
  75                                             m_inhibitRequests[m_latestInhibitCookie].reason),
  76                                             0, "dialog-cancel");
  77         }
  78         return true;
  79     }
  80 }
  81
  82 bool SuspensionLockHandler::setNotificationLock(bool automated)
  83 {
  84     if (!canStartNotification(automated)) {
  85         kDebug() << "Notification lock present, aborting";
  86         return false;
  87     }
  88
  89     m_isOnNotification = true;
  90
  91     return true;
  92 }
  93
  94 bool SuspensionLockHandler::setJobLock(bool automated)
  95 {
  96     if (!canStartSuspension(automated)) {
  97         kDebug() << "Suspension lock present, aborting";
  98         return false;
  99     }
 100
 101     m_isJobOngoing = true;
 102
 103     return true;
 104 }
 105
 106 int SuspensionLockHandler::inhibit(const QString &application, const QString &reason)
 107 {
 108     ++m_latestInhibitCookie;
 109
 110     InhibitRequest req;
 111     //TODO: Keep track of the service name too, to cleanup cookie in case of a crash.
 112     req.application = application;
 113     req.reason = reason;
 114     req.cookie = m_latestInhibitCookie;
 115     m_inhibitRequests[m_latestInhibitCookie] = req;
 116
 117     emit inhibitChanged(true);
 118
 119     return m_latestInhibitCookie;
 120 }
 121
 122 void SuspensionLockHandler::releaseNotificationLock()
 123 {
 124     kDebug() << "Releasing notification lock";
 125     m_isOnNotification = false;
 126 }
 127
 128 void SuspensionLockHandler::releaseAllLocks()
 129 {
 130     kDebug() << "Releasing locks";
 131     m_isJobOngoing = false;
 132     m_isOnNotification = false;
 133 }
 134
 135 void SuspensionLockHandler::releaseAllInhibitions()
 136 {
 137     m_inhibitRequests.clear();
 138     emit inhibitChanged(false);
 139 }
 140
 141 void SuspensionLockHandler::releaseInhibiton(int cookie)
 142 {
 143     kDebug() << "Removing cookie" << cookie;
 144     m_inhibitRequests.remove(cookie);
 145     if (m_inhibitRequests.isEmpty()) {
 146         emit inhibitChanged(false);
 147     }
 148 }
 149
 150 #include "SuspensionLockHandler.moc"