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eventloopinteractor.cpp
1 /* qeventloopinteractor.cpp
2  Copyright (C) 2003, 2007 Klarälvdalens Datakonsult AB
3 
4  This file is part of QGPGME.
5 
6  QGPGME is free software; you can redistribute it and/or modify it
7  under the terms of the GNU Library General Public License as published
8  by the Free Software Foundation; either version 2 of the License, or
9  (at your option) any later version.
10 
11  QGPGME is distributed in the hope that it will be useful, but
12  WITHOUT ANY WARRANTY; without even the implied warranty of
13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  GNU Library General Public License for more details.
15 
16  You should have received a copy of the GNU Library General Public License
17  along with QGPGME; see the file COPYING.LIB. If not, write to the
18  Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19  Boston, MA 02110-1301, USA. */
20 
21 // -*- c++ -*-
22 
23 #include <qgpgme/eventloopinteractor.h>
24 #include <gpgme++/context.h>
25 
26 #include <QCoreApplication>
27 #include <QSocketNotifier>
28 #include <QPointer>
29 
30 using namespace GpgME;
31 
32 QGpgME::EventLoopInteractor::EventLoopInteractor( QObject * parent )
33  : QObject( parent ), GpgME::EventLoopInteractor()
34 {
35  setObjectName( QLatin1String( "QGpgME::EventLoopInteractor::instance()" ) );
36  if ( !parent ) {
37  if ( QCoreApplication * const app = QCoreApplication::instance() ) {
38  connect( app, SIGNAL(aboutToQuit()), SLOT(deleteLater()) );
39  connect( app, SIGNAL(aboutToQuit()), SIGNAL(aboutToDestroy()) );
40  }
41  }
42  mSelf = this;
43 }
44 
45 QGpgME::EventLoopInteractor::~EventLoopInteractor() {
46  emit aboutToDestroy();
47  mSelf = 0;
48 }
49 
50 QGpgME::EventLoopInteractor * QGpgME::EventLoopInteractor::mSelf = 0;
51 
52 QGpgME::EventLoopInteractor * QGpgME::EventLoopInteractor::instance() {
53  if ( !mSelf ) {
54 #ifndef NDEBUG
55  if ( !QCoreApplication::instance() ) {
56  qWarning( "QGpgME::EventLoopInteractor: Need a Q(Core)Application object before calling instance()!" );
57  } else {
58 #endif
59  (void)new EventLoopInteractor;
60 #ifndef NDEBUG
61  }
62 #endif
63  }
64  return mSelf;
65 }
66 
67 namespace {
68 
69  template <typename T_Enableable>
70  class QDisabler {
71  const QPointer<T_Enableable> o;
72  const bool wasEnabled;
73  public:
74  explicit QDisabler( T_Enableable * t ) : o( t ), wasEnabled( o && o->isEnabled() )
75  {
76  if ( t ) {
77  t->setEnabled( false );
78  }
79  }
80  ~QDisabler()
81  {
82  if ( o ) {
83  o->setEnabled( wasEnabled );
84  }
85  }
86  };
87 }
88 
89 void QGpgME::EventLoopInteractor::slotWriteActivity( int socket ) {
90  // Make sure to disable the notifier while we are processing the event, as
91  // it's easy to run into re-entrancy issues, if actOn causes things to return
92  // to the event loop in some way (such as showing the passphrase dialog).
93  // We use a qpointer as actOn will destroy the notifier, when it's done with the FD
94  const QDisabler<QSocketNotifier> disabled( qobject_cast<QSocketNotifier*>( sender() ) );
95  actOn( socket , Write );
96 }
97 
98 void QGpgME::EventLoopInteractor::slotReadActivity( int socket ) {
99  const QDisabler<QSocketNotifier> disabled( qobject_cast<QSocketNotifier*>( sender() ) );
100  actOn( socket , Read );
101 }
102 
103 void QGpgME::EventLoopInteractor::nextTrustItemEvent( GpgME::Context * context, const GpgME::TrustItem & item ) {
104  emit nextTrustItemEventSignal( context, item );
105 }
106 
107 void QGpgME::EventLoopInteractor::nextKeyEvent( GpgME::Context * context, const GpgME::Key & key ) {
108  emit nextKeyEventSignal( context, key );
109 }
110 
111 void QGpgME::EventLoopInteractor::operationDoneEvent( GpgME::Context * context, const GpgME::Error & e ) {
112  emit operationDoneEventSignal( context, e );
113 }
114 
115 void QGpgME::EventLoopInteractor::operationStartEvent( GpgME::Context * context ) {
116  emit operationStartEventSignal( context );
117 }
118 
QCoreApplication
QPointer
QObject
QCoreApplication::instance
QCoreApplication * instance()
QLatin1String
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Documentation copyright © 1996-2020 The KDE developers.
Generated on Mon Jun 22 2020 13:37:43 by doxygen 1.8.7 written by Dimitri van Heesch, © 1997-2006

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