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+/*
+ threadedjobmixin.h
+
+ This file is part of qgpgme, the Qt API binding for gpgme
+ Copyright (c) 2008 Klarälvdalens Datakonsult AB
+ Copyright (c) 2016 Intevation GmbH
+
+ QGpgME is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ QGpgME is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+ In addition, as a special exception, the copyright holders give
+ permission to link the code of this program with any edition of
+ the Qt library by Trolltech AS, Norway (or with modified versions
+ of Qt that use the same license as Qt), and distribute linked
+ combinations including the two. You must obey the GNU General
+ Public License in all respects for all of the code used other than
+ Qt. If you modify this file, you may extend this exception to
+ your version of the file, but you are not obligated to do so. If
+ you do not wish to do so, delete this exception statement from
+ your version.
+*/
+
+#ifndef __QGPGME_THREADEDJOBMIXING_H__
+#define __QGPGME_THREADEDJOBMIXING_H__
+
+#include <QMutex>
+#include <QMutexLocker>
+#include <QThread>
+#include <QString>
+#include <QIODevice>
+
+#ifdef BUILDING_QGPGME
+# include "context.h"
+# include "interfaces/progressprovider.h"
+#else
+# include <gpgme++/context.h>
+# include <gpgme++/interfaces/progressprovider.h>
+#endif
+
+
+#include <cassert>
+
+namespace QGpgME
+{
+namespace _detail
+{
+
+QString audit_log_as_html(GpgME::Context *ctx, GpgME::Error &err);
+
+class PatternConverter
+{
+ const QList<QByteArray> m_list;
+ mutable const char **m_patterns;
+public:
+ explicit PatternConverter(const QByteArray &ba);
+ explicit PatternConverter(const QString &s);
+ explicit PatternConverter(const QList<QByteArray> &lba);
+ explicit PatternConverter(const QStringList &sl);
+ ~PatternConverter();
+
+ const char **patterns() const;
+};
+
+class ToThreadMover
+{
+ QObject *const m_object;
+ QThread *const m_thread;
+public:
+ ToThreadMover(QObject *o, QThread *t) : m_object(o), m_thread(t) {}
+ ToThreadMover(QObject &o, QThread *t) : m_object(&o), m_thread(t) {}
+ ToThreadMover(const std::shared_ptr<QObject> &o, QThread *t) : m_object(o.get()), m_thread(t) {}
+ ~ToThreadMover()
+ {
+ if (m_object && m_thread) {
+ m_object->moveToThread(m_thread);
+ }
+ }
+};
+
+template <typename T_result>
+class Thread : public QThread
+{
+public:
+ explicit Thread(QObject *parent = Q_NULLPTR) : QThread(parent) {}
+
+ void setFunction(const std::function<T_result()> &function)
+ {
+ const QMutexLocker locker(&m_mutex);
+ m_function = function;
+ }
+
+ T_result result() const
+ {
+ const QMutexLocker locker(&m_mutex);
+ return m_result;
+ }
+
+private:
+ void run() Q_DECL_OVERRIDE {
+ const QMutexLocker locker(&m_mutex);
+ m_result = m_function();
+ }
+private:
+ mutable QMutex m_mutex;
+ std::function<T_result()> m_function;
+ T_result m_result;
+};
+
+template <typename T_base, typename T_result = std::tuple<GpgME::Error, QString, GpgME::Error> >
+class ThreadedJobMixin : public T_base, public GpgME::ProgressProvider
+{
+public:
+ typedef ThreadedJobMixin<T_base, T_result> mixin_type;
+ typedef T_result result_type;
+
+protected:
+ static_assert(std::tuple_size<T_result>::value > 2,
+ "Result tuple too small");
+ static_assert(std::is_same <
+ typename std::tuple_element <
+ std::tuple_size<T_result>::value - 2,
+ T_result
+ >::type,
+ QString
+ >::value,
+ "Second to last result type not a QString");
+ static_assert(std::is_same <
+ typename std::tuple_element <
+ std::tuple_size<T_result>::value - 1,
+ T_result
+ >::type,
+ GpgME::Error
+ >::value,
+ "Last result type not a GpgME::Error");
+
+ explicit ThreadedJobMixin(GpgME::Context *ctx)
+ : T_base(0), m_ctx(ctx), m_thread(), m_auditLog(), m_auditLogError()
+ {
+
+ }
+
+ void lateInitialization()
+ {
+ assert(m_ctx);
+ QObject::connect(&m_thread, SIGNAL(finished()), this, SLOT(slotFinished()));
+ m_ctx->setProgressProvider(this);
+ }
+
+ template <typename T_binder>
+ void run(const T_binder &func)
+ {
+ m_thread.setFunction(std::bind(func, this->context()));
+ m_thread.start();
+ }
+ template <typename T_binder>
+ void run(const T_binder &func, const std::shared_ptr<QIODevice> &io)
+ {
+ if (io) {
+ io->moveToThread(&m_thread);
+ }
+ // the arguments passed here to the functor are stored in a QThread, and are not
+ // necessarily destroyed (living outside the UI thread) at the time the result signal
+ // is emitted and the signal receiver wants to clean up IO devices.
+ // To avoid such races, we pass std::weak_ptr's to the functor.
+ m_thread.setFunction(std::bind(func, this->context(), this->thread(), std::weak_ptr<QIODevice>(io)));
+ m_thread.start();
+ }
+ template <typename T_binder>
+ void run(const T_binder &func, const std::shared_ptr<QIODevice> &io1, const std::shared_ptr<QIODevice> &io2)
+ {
+ if (io1) {
+ io1->moveToThread(&m_thread);
+ }
+ if (io2) {
+ io2->moveToThread(&m_thread);
+ }
+ // the arguments passed here to the functor are stored in a QThread, and are not
+ // necessarily destroyed (living outside the UI thread) at the time the result signal
+ // is emitted and the signal receiver wants to clean up IO devices.
+ // To avoid such races, we pass std::weak_ptr's to the functor.
+ m_thread.setFunction(std::bind(func, this->context(), this->thread(), std::weak_ptr<QIODevice>(io1), std::weak_ptr<QIODevice>(io2)));
+ m_thread.start();
+ }
+ GpgME::Context *context() const
+ {
+ return m_ctx.get();
+ }
+
+ virtual void resultHook(const result_type &) {}
+
+ void slotFinished()
+ {
+ const T_result r = m_thread.result();
+ m_auditLog = std::get < std::tuple_size<T_result>::value - 2 > (r);
+ m_auditLogError = std::get < std::tuple_size<T_result>::value - 1 > (r);
+ resultHook(r);
+ Q_EMIT this->done();
+ doEmitResult(r);
+ this->deleteLater();
+ }
+ void slotCancel() Q_DECL_OVERRIDE {
+ if (m_ctx)
+ {
+ m_ctx->cancelPendingOperation();
+ }
+ }
+ QString auditLogAsHtml() const Q_DECL_OVERRIDE
+ {
+ return m_auditLog;
+ }
+ GpgME::Error auditLogError() const Q_DECL_OVERRIDE
+ {
+ return m_auditLogError;
+ }
+ void showProgress(const char *what, int type, int current, int total) Q_DECL_OVERRIDE {
+ // will be called from the thread exec'ing the operation, so
+ // just bounce everything to the owning thread:
+ // ### hope this is thread-safe (meta obj is const, and
+ // ### portEvent is thread-safe, so should be ok)
+ QMetaObject::invokeMethod(this, "progress", Qt::QueuedConnection,
+ // TODO port
+ Q_ARG(QString, QString()),
+ Q_ARG(int, current),
+ Q_ARG(int, total));
+ }
+private:
+ template <typename T1, typename T2>
+ void doEmitResult(const std::tuple<T1, T2> &tuple)
+ {
+ Q_EMIT this->result(std::get<0>(tuple), std::get<1>(tuple));
+ }
+
+ template <typename T1, typename T2, typename T3>
+ void doEmitResult(const std::tuple<T1, T2, T3> &tuple)
+ {
+ Q_EMIT this->result(std::get<0>(tuple), std::get<1>(tuple), std::get<2>(tuple));
+ }
+
+ template <typename T1, typename T2, typename T3, typename T4>
+ void doEmitResult(const std::tuple<T1, T2, T3, T4> &tuple)
+ {
+ Q_EMIT this->result(std::get<0>(tuple), std::get<1>(tuple), std::get<2>(tuple), std::get<3>(tuple));
+ }
+
+ template <typename T1, typename T2, typename T3, typename T4, typename T5>
+ void doEmitResult(const std::tuple<T1, T2, T3, T4, T5> &tuple)
+ {
+ Q_EMIT this->result(std::get<0>(tuple), std::get<1>(tuple), std::get<2>(tuple), std::get<3>(tuple), std::get<4>(tuple));
+ }
+
+private:
+ std::shared_ptr<GpgME::Context> m_ctx;
+ Thread<T_result> m_thread;
+ QString m_auditLog;
+ GpgME::Error m_auditLogError;
+};
+
+}
+}
+
+#endif /* __QGPGME_THREADEDJOBMIXING_H__ */
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