File indexing completed on 2024-04-21 16:17:33

 /*
  * SPDX-FileCopyrightText: 2014 Daniel Vratil <dvratil@redhat.com>
  * SPDX-FileCopyrightText: 2015 Sebastian Kügler <sebas@kde.org>
  *
  * SPDX-License-Identifier: LGPL-2.1-or-later
  *
  */
 
 #include "configoperation.h"
 
 #include "backendmanager_p.h"
 #include "configoperation_p.h"
 
 #include "kscreen_debug.h"
 
 using namespace KScreen;
 
 ConfigOperationPrivate::ConfigOperationPrivate(ConfigOperation *qq)
     : QObject()
     , isExec(false)
     , q_ptr(qq)
 {
 }
 
 ConfigOperationPrivate::~ConfigOperationPrivate()
 {
 }
 
 void ConfigOperationPrivate::requestBackend()
 {
     Q_ASSERT(BackendManager::instance()->method() == BackendManager::OutOfProcess);
     connect(BackendManager::instance(), &BackendManager::backendReady, this, &ConfigOperationPrivate::backendReady);
     BackendManager::instance()->requestBackend();
 }
 
 void ConfigOperationPrivate::backendReady(org::kde::kscreen::Backend *backend)
 {
     Q_ASSERT(BackendManager::instance()->method() == BackendManager::OutOfProcess);
     Q_UNUSED(backend);
 
     disconnect(BackendManager::instance(), &BackendManager::backendReady, this, &ConfigOperationPrivate::backendReady);
 }
 
 void ConfigOperationPrivate::doEmitResult()
 {
     Q_Q(ConfigOperation);
 
     Q_EMIT q->finished(q);
 
     // Don't call deleteLater() when this operation is running from exec()
     // because then the operation will be deleted when we return control to
     // the nested QEventLoop in exec() (i.e. before loop.exec() returns)
     // and subsequent hasError() call references deleted "this". Instead we
     // shedule the operation for deletion manually in exec(), so that it will
     // be deleted when control returns to parent event loop (or QApplication).
     if (!isExec) {
         q->deleteLater();
     }
 }
 
 ConfigOperation::ConfigOperation(ConfigOperationPrivate *dd, QObject *parent)
     : QObject(parent)
     , d_ptr(dd)
 {
     const bool ok = QMetaObject::invokeMethod(this, "start", Qt::QueuedConnection);
     Q_ASSERT(ok);
     Q_UNUSED(ok);
 }
 
 ConfigOperation::~ConfigOperation()
 {
     delete d_ptr;
 }
 
 bool ConfigOperation::hasError() const
 {
     Q_D(const ConfigOperation);
     return !d->error.isEmpty();
 }
 
 QString ConfigOperation::errorString() const
 {
     Q_D(const ConfigOperation);
     return d->error;
 }
 
 void ConfigOperation::setError(const QString &error)
 {
     Q_D(ConfigOperation);
     d->error = error;
 }
 
 void ConfigOperation::emitResult()
 {
     Q_D(ConfigOperation);
     const bool ok = QMetaObject::invokeMethod(d, "doEmitResult", Qt::QueuedConnection);
     Q_ASSERT(ok);
     Q_UNUSED(ok);
 }
 
 bool ConfigOperation::exec()
 {
     Q_D(ConfigOperation);
 
     QEventLoop loop;
     connect(this, &ConfigOperation::finished, this, [&](ConfigOperation *op) {
         Q_UNUSED(op);
         loop.quit();
     });
 
     d->isExec = true;
     loop.exec(QEventLoop::ExcludeUserInputEvents);
 
     // Schedule the operation for deletion, see doEmitResult()
     deleteLater();
     return !hasError();
 }
 
 KScreen::AbstractBackend *ConfigOperationPrivate::loadBackend()
 {
     Q_ASSERT(BackendManager::instance()->method() == BackendManager::InProcess);
     Q_Q(ConfigOperation);
     const QString &name = QString::fromUtf8(qgetenv("KSCREEN_BACKEND"));
     auto backend = KScreen::BackendManager::instance()->loadBackendInProcess(name);
     if (backend == nullptr) {
         const QString &e = QStringLiteral("Plugin does not provide valid KScreen backend");
         qCDebug(KSCREEN) << e;
         q->setError(e);
         q->emitResult();
     }
     return backend;
 }