/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/*

 * This file is part of the LibreOffice project.

 *

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/.

 *

 * This file incorporates work covered by the following license notice:

 *

 *   Licensed to the Apache Software Foundation (ASF) under one or more

 *   contributor license agreements. See the NOTICE file distributed

 *   with this work for additional information regarding copyright

 *   ownership. The ASF licenses this file to you under the Apache

 *   License, Version 2.0 (the "License"); you may not use this file

 *   except in compliance with the License. You may obtain a copy of

 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .

 */

#include <DrawController.hxx>

#include <ViewShellBase.hxx>

#include <slideshow.hxx>

#include <ResourceId.hxx>

#include "SlideShowRestarter.hxx"

#include <comphelper/propertyvalue.hxx>

#include <framework/ConfigurationController.hxx>

#include <framework/FrameworkHelper.hxx>

#include <framework/ConfigurationChangeEvent.hxx>

#include <sfx2/dispatch.hxx>

#include <sfx2/viewfrm.hxx>

#include <svx/svxids.hrc>

#include <utility>

#include <vcl/svapp.hxx>

#include <functional>

using namespace ::com::sun::star::uno;

using namespace ::com::sun::star::lang;

using ::sd::framework::FrameworkHelper;

namespace sd {

SlideShowRestarter::SlideShowRestarter (

    ::rtl::Reference<SlideShow> pSlideShow,

    ViewShellBase* pViewShellBase)

    : mnEventId(nullptr),

      mpSlideShow(std::move(pSlideShow)),

      mpViewShellBase(pViewShellBase),

      mnDisplayCount(Application::GetScreenCount()),

      mpDispatcher(pViewShellBase->GetViewFrame().GetDispatcher()),

      mnCurrentSlideNumber(0)

{

}

SlideShowRestarter::~SlideShowRestarter()

{

}

void SlideShowRestarter::Restart (bool bForce)

{

    // Prevent multiple and concurrently restarts.

    if (mnEventId != nullptr)

        return;

    if (bForce)

        mnDisplayCount = 0;

    // Remember the current slide in order to restore it after the slide

    // show has been restarted.

    if (mpSlideShow.is())

        mnCurrentSlideNumber = mpSlideShow->getCurrentPageNumber();

    // Remember a shared pointer to this object to prevent its destruction

    // before the whole restarting process has finished.

    mpSelf = shared_from_this();

    // We do not know in what situation this method was called.  So, in

    // order to be able to cleanly stop the presentation, we do that

    // asynchronously.

    mnEventId = Application::PostUserEvent(

        LINK(this, SlideShowRestarter, EndPresentation));

}

IMPL_LINK_NOARG(SlideShowRestarter, EndPresentation, void*, void)

{

    mnEventId = nullptr;

    if (!mpSlideShow.is())

        return;

    if (mnDisplayCount == static_cast<sal_Int32>(Application::GetScreenCount()))

        return;

    bool bIsExitAfterPresenting = mpSlideShow->IsExitAfterPresenting();

    mpSlideShow->SetExitAfterPresenting(false);

    mpSlideShow->end();

    mpSlideShow->SetExitAfterPresenting(bIsExitAfterPresenting);

    // The following piece of code should not be here because the

    // slide show should be aware of the existence of the presenter

    // console (which is displayed in the FullScreenPane).  But the

    // timing has to be right and I did not find a better place for

    // it.

    // Wait for the full screen pane, which displays the presenter

    // console, to disappear.  Only when it is gone, call

    // InitiatePresenterStart(), in order to begin the asynchronous

    // restart of the slide show.

    if (mpViewShellBase == nullptr)

        return;

    ::std::shared_ptr<FrameworkHelper> pHelper(

        FrameworkHelper::Instance(*mpViewShellBase));

    if (pHelper->GetConfigurationController()->getResource(

        new ::sd::framework::ResourceId(FrameworkHelper::msFullScreenPaneURL)).is())

    {

        ::sd::framework::ConfigurationController::Lock aLock (

            pHelper->GetConfigurationController());

        pHelper->RunOnConfigurationEvent(

            sd::framework::ConfigurationChangeEventType::ConfigurationUpdateEnd,

            [self = shared_from_this()](bool) { self->StartPresentation(); });

        pHelper->UpdateConfiguration();

    }

    else

    {

        StartPresentation();

    }

}

void SlideShowRestarter::StartPresentation()

{

    //rhbz#1091117 crash because we're exiting the application, and this is

    //being called during the configuration update event on exit. At this point

    //newly created objects won't get disposed called on them, because the

    //disposer is doing its last execution of that now.

    if (mpViewShellBase && mpViewShellBase->GetDrawController()->IsDisposing())

        return;

    if (mpDispatcher == nullptr && mpViewShellBase!=nullptr)

        mpDispatcher = mpViewShellBase->GetViewFrame().GetDispatcher();

    // Start the slide show on the saved current slide.

    if (mpDispatcher != nullptr)

    {

        mpDispatcher->Execute(SID_PRESENTATION, SfxCallMode::ASYNCHRON);

        if (mpSlideShow.is())

        {

            Sequence aProperties{ comphelper::makePropertyValue(u"FirstPage"_ustr,

                                  "page" + OUString::number(mnCurrentSlideNumber+1)) };

            mpSlideShow->startWithArguments(aProperties);

        }

        mpSelf.reset();

    }

}

} // end of namespace sd

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