sd/source/ui/slideshow/SlideShowRestarter.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <DrawController.hxx>
  21 #include <ViewShellBase.hxx>
  22 #include <slideshow.hxx>
  23 #include "SlideShowRestarter.hxx"
  24
  25 #include <comphelper/propertyvalue.hxx>
  26 #include <framework/ConfigurationController.hxx>
  27 #include <framework/FrameworkHelper.hxx>
  28 #include <sfx2/dispatch.hxx>
  29 #include <sfx2/viewfrm.hxx>
  30 #include <svx/svxids.hrc>
  31 #include <utility>
  32 #include <vcl/svapp.hxx>
  33
  34 #include <functional>
  35
  36 using namespace ::com::sun::star::uno;
  37 using namespace ::com::sun::star::lang;
  38 using ::sd::framework::FrameworkHelper;
  39
  40 namespace sd {
  41
  42 SlideShowRestarter::SlideShowRestarter (
  43     ::rtl::Reference<SlideShow> pSlideShow,
  44     ViewShellBase* pViewShellBase)
  45     : mnEventId(nullptr),
  46       mpSlideShow(std::move(pSlideShow)),
  47       mpViewShellBase(pViewShellBase),
  48       mnDisplayCount(Application::GetScreenCount()),
  49       mpDispatcher(pViewShellBase->GetViewFrame().GetDispatcher()),
  50       mnCurrentSlideNumber(0)
  51 {
  52 }
  53
  54 SlideShowRestarter::~SlideShowRestarter()
  55 {
  56 }
  57
  58 void SlideShowRestarter::Restart (bool bForce)
  59 {
  60     // Prevent multiple and concurrently restarts.
  61     if (mnEventId != nullptr)
  62         return;
  63
  64     if (bForce)
  65         mnDisplayCount = 0;
  66
  67     // Remember the current slide in order to restore it after the slide
  68     // show has been restarted.
  69     if (mpSlideShow.is())
  70         mnCurrentSlideNumber = mpSlideShow->getCurrentPageNumber();
  71
  72     // Remember a shared pointer to this object to prevent its destruction
  73     // before the whole restarting process has finished.
  74     mpSelf = shared_from_this();
  75
  76     // We do not know in what situation this method was called.  So, in
  77     // order to be able to cleanly stop the presentation, we do that
  78     // asynchronously.
  79     mnEventId = Application::PostUserEvent(
  80         LINK(this, SlideShowRestarter, EndPresentation));
  81 }
  82
  83 IMPL_LINK_NOARG(SlideShowRestarter, EndPresentation, void*, void)
  84 {
  85     mnEventId = nullptr;
  86     if (!mpSlideShow.is())
  87         return;
  88
  89     if (mnDisplayCount == static_cast<sal_Int32>(Application::GetScreenCount()))
  90         return;
  91
  92     bool bIsExitAfterPresenting = mpSlideShow->IsExitAfterPresenting();
  93     mpSlideShow->SetExitAfterPresenting(false);
  94     mpSlideShow->end();
  95     mpSlideShow->SetExitAfterPresenting(bIsExitAfterPresenting);
  96
  97     // The following piece of code should not be here because the
  98     // slide show should be aware of the existence of the presenter
  99     // console (which is displayed in the FullScreenPane).  But the
 100     // timing has to be right and I did not find a better place for
 101     // it.
 102
 103     // Wait for the full screen pane, which displays the presenter
 104     // console, to disappear.  Only when it is gone, call
 105     // InitiatePresenterStart(), in order to begin the asynchronous
 106     // restart of the slide show.
 107     if (mpViewShellBase == nullptr)
 108         return;
 109
 110     ::std::shared_ptr<FrameworkHelper> pHelper(
 111         FrameworkHelper::Instance(*mpViewShellBase));
 112     if (pHelper->GetConfigurationController()->getResource(
 113         FrameworkHelper::CreateResourceId(FrameworkHelper::msFullScreenPaneURL)).is())
 114     {
 115         ::sd::framework::ConfigurationController::Lock aLock (
 116             pHelper->GetConfigurationController());
 117
 118         pHelper->RunOnConfigurationEvent(
 119             FrameworkHelper::msConfigurationUpdateEndEvent,
 120             ::std::bind(&SlideShowRestarter::StartPresentation, shared_from_this()));
 121         pHelper->UpdateConfiguration();
 122     }
 123     else
 124     {
 125         StartPresentation();
 126     }
 127 }
 128
 129 void SlideShowRestarter::StartPresentation()
 130 {
 131     //rhbz#1091117 crash because we're exiting the application, and this is
 132     //being called during the configuration update event on exit. At this point
 133     //newly created objects won't get disposed called on them, because the
 134     //disposer is doing its last execution of that now.
 135     if (mpViewShellBase && mpViewShellBase->GetDrawController()->IsDisposing())
 136         return;
 137
 138     if (mpDispatcher == nullptr && mpViewShellBase!=nullptr)
 139         mpDispatcher = mpViewShellBase->GetViewFrame().GetDispatcher();
 140
 141     // Start the slide show on the saved current slide.
 142     if (mpDispatcher != nullptr)
 143     {
 144         mpDispatcher->Execute(SID_PRESENTATION, SfxCallMode::ASYNCHRON);
 145         if (mpSlideShow.is())
 146         {
 147             Sequence aProperties{ comphelper::makePropertyValue(u"FirstPage"_ustr,
 148                                   "page" + OUString::number(mnCurrentSlideNumber+1)) };
 149             mpSlideShow->startWithArguments(aProperties);
 150         }
 151         mpSelf.reset();
 152     }
 153 }
 154
 155 } // end of namespace sd
 156
 157 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */