eventloopinteractor.cpp
00001 /* qeventloopinteractor.cpp 00002 Copyright (C) 2003, 2007 Klarälvdalens Datakonsult AB 00003 00004 This file is part of QGPGME. 00005 00006 QGPGME is free software; you can redistribute it and/or modify it 00007 under the terms of the GNU Library General Public License as published 00008 by the Free Software Foundation; either version 2 of the License, or 00009 (at your option) any later version. 00010 00011 QGPGME is distributed in the hope that it will be useful, but 00012 WITHOUT ANY WARRANTY; without even the implied warranty of 00013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 GNU Library General Public License for more details. 00015 00016 You should have received a copy of the GNU Library General Public License 00017 along with QGPGME; see the file COPYING.LIB. If not, write to the 00018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 00019 Boston, MA 02110-1301, USA. */ 00020 00021 // -*- c++ -*- 00022 00023 #include <qgpgme/eventloopinteractor.h> 00024 #include <gpgme++/context.h> 00025 00026 #include <QCoreApplication> 00027 #include <QSocketNotifier> 00028 #include <QPointer> 00029 00030 using namespace GpgME; 00031 00032 QGpgME::EventLoopInteractor::EventLoopInteractor( QObject * parent ) 00033 : QObject( parent ), GpgME::EventLoopInteractor() 00034 { 00035 setObjectName( QLatin1String( "QGpgME::EventLoopInteractor::instance()" ) ); 00036 if ( !parent ) 00037 if ( QCoreApplication * const app = QCoreApplication::instance() ) { 00038 connect( app, SIGNAL(aboutToQuit()), SLOT(deleteLater()) ); 00039 connect( app, SIGNAL(aboutToQuit()), SIGNAL(aboutToDestroy()) ); 00040 } 00041 mSelf = this; 00042 } 00043 00044 QGpgME::EventLoopInteractor::~EventLoopInteractor() { 00045 emit aboutToDestroy(); 00046 mSelf = 0; 00047 } 00048 00049 QGpgME::EventLoopInteractor * QGpgME::EventLoopInteractor::mSelf = 0; 00050 00051 QGpgME::EventLoopInteractor * QGpgME::EventLoopInteractor::instance() { 00052 if ( !mSelf ) { 00053 #ifndef NDEBUG 00054 if ( !QCoreApplication::instance() ) 00055 qWarning( "QGpgME::EventLoopInteractor: Need a Q(Core)Application object before calling instance()!" ); 00056 else 00057 #endif 00058 (void)new EventLoopInteractor; 00059 } 00060 return mSelf; 00061 } 00062 00063 namespace { 00064 00065 template <typename T_Enableable> 00066 class QDisabler { 00067 const QPointer<T_Enableable> o; 00068 const bool wasEnabled; 00069 public: 00070 explicit QDisabler( T_Enableable * t ) : o( t ), wasEnabled( o && o->isEnabled() ) { if ( t ) t->setEnabled( false ); } 00071 ~QDisabler() { if ( o ) o->setEnabled( wasEnabled ); } 00072 }; 00073 } 00074 00075 void QGpgME::EventLoopInteractor::slotWriteActivity( int socket ) { 00076 // Make sure to disable the notifier while we are processing the event, as 00077 // it's easy to run into re-entrancy issues, if actOn causes things to return 00078 // to the event loop in some way (such as showing the passphrase dialog). 00079 // We use a qpointer as actOn will destroy the notifier, when it's done with the FD 00080 const QDisabler<QSocketNotifier> disabled( qobject_cast<QSocketNotifier*>( sender() ) ); 00081 actOn( socket , Write ); 00082 } 00083 00084 void QGpgME::EventLoopInteractor::slotReadActivity( int socket ) { 00085 const QDisabler<QSocketNotifier> disabled( qobject_cast<QSocketNotifier*>( sender() ) ); 00086 actOn( socket , Read ); 00087 } 00088 00089 void QGpgME::EventLoopInteractor::nextTrustItemEvent( GpgME::Context * context, const GpgME::TrustItem & item ) { 00090 emit nextTrustItemEventSignal( context, item ); 00091 } 00092 00093 void QGpgME::EventLoopInteractor::nextKeyEvent( GpgME::Context * context, const GpgME::Key & key ) { 00094 emit nextKeyEventSignal( context, key ); 00095 } 00096 00097 void QGpgME::EventLoopInteractor::operationDoneEvent( GpgME::Context * context, const GpgME::Error & e ) { 00098 emit operationDoneEventSignal( context, e ); 00099 } 00100 00101 void QGpgME::EventLoopInteractor::operationStartEvent( GpgME::Context * context ) { 00102 emit operationStartEventSignal( context ); 00103 } 00104 00105 #include "eventloopinteractor.moc"