kde-extraapps/gwenview/lib/document/savejob.cpp
Ivailo Monev cdfe6fab07 gwenview: reimplement metadata, image data and save job via QThread and std::future<T>
Signed-off-by: Ivailo Monev <xakepa10@gmail.com>
2022-05-19 18:19:37 +03:00

153 lines
3.6 KiB
C++

// vim: set tabstop=4 shiftwidth=4 expandtab:
/*
Gwenview: an image viewer
Copyright 2009 Aurélien Gâteau <agateau@kde.org>
This program 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.
This program 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, Cambridge, MA 02110-1301, USA.
*/
// Self
#include "savejob.h"
// Qt
#include <QScopedPointer>
// KDE
#include <KApplication>
#include <KIO/CopyJob>
#include <KIO/JobUiDelegate>
#include <KLocale>
#include <KSaveFile>
#include <KTemporaryFile>
#include <KUrl>
// Local
#include "documentloadedimpl.h"
namespace Gwenview
{
struct SaveJobPrivate
{
DocumentLoadedImpl* mImpl;
KUrl mOldUrl;
KUrl mNewUrl;
QByteArray mFormat;
QString mTemporaryFile;
std::future<void> mFuture;
QScopedPointer<VoidFuture> mSaveFuture;
bool mKillReceived;
};
SaveJob::SaveJob(DocumentLoadedImpl* impl, const KUrl& url, const QByteArray& format)
: d(new SaveJobPrivate)
{
d->mImpl = impl;
d->mOldUrl = impl->document()->url();
d->mNewUrl = url;
d->mFormat = format;
d->mFuture = std::async(std::launch::deferred, &SaveJob::saveInternal, this);
d->mKillReceived = false;
setCapabilities(Killable);
}
SaveJob::~SaveJob()
{
delete d;
}
void SaveJob::saveInternal()
{
if (!d->mImpl->saveInternal(d->mTemporaryFile, d->mFormat)) {
QFile::remove(d->mTemporaryFile);
setError(UserDefinedError + 2);
setErrorText(d->mImpl->document()->errorString());
}
}
void SaveJob::doStart()
{
if (d->mKillReceived) {
return;
}
{
QScopedPointer<KTemporaryFile> temporaryFile(new KTemporaryFile());
temporaryFile->setAutoRemove(true);
temporaryFile->setSuffix(QString::fromLatin1(".%1").arg(d->mFormat.constData()));
if (!temporaryFile->open()) {
KUrl dirUrl = d->mNewUrl;
dirUrl.setFileName(QString());
setError(UserDefinedError + 1);
setErrorText(i18nc("@info", "Could not open file for writing, check that you have the necessary rights in <filename>%1</filename>.", dirUrl.pathOrUrl()));
emitResult();
return;
}
d->mTemporaryFile = temporaryFile->fileName();
}
d->mSaveFuture.reset(new VoidFuture(this, &d->mFuture));
connect(d->mSaveFuture.data(), SIGNAL(finished()), SLOT(finishSave()));
d->mSaveFuture->start();
}
void SaveJob::finishSave()
{
d->mSaveFuture.reset(nullptr);
if (d->mKillReceived) {
return;
}
if (error()) {
emitResult();
return;
}
// whether to overwite has already been asked for
KIO::Job* job = KIO::move(KUrl::fromPath(d->mTemporaryFile), d->mNewUrl, KIO::Overwrite);
job->ui()->setWindow(KApplication::kApplication()->activeWindow());
addSubjob(job);
}
void SaveJob::slotResult(KJob* job)
{
DocumentJob::slotResult(job);
if (!error()) {
emitResult();
}
}
KUrl SaveJob::oldUrl() const
{
return d->mOldUrl;
}
KUrl SaveJob::newUrl() const
{
return d->mNewUrl;
}
bool SaveJob::doKill()
{
d->mKillReceived = true;
if (d->mSaveFuture) {
d->mSaveFuture->wait();
}
return true;
}
} // namespace