sd/source/ui/slidesorter/controller/SlsSelectionObserver.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 <SlideSorter.hxx>
  21 #include <controller/SlideSorterController.hxx>
  22 #include <controller/SlsSelectionManager.hxx>
  23 #include <controller/SlsSelectionObserver.hxx>
  24 #include <controller/SlsPageSelector.hxx>
  25 #include <controller/SlsFocusManager.hxx>
  26 #include <sdpage.hxx>
  27 #include <osl/diagnose.h>
  28
  29 namespace sd::slidesorter::controller
  30 {
  31 SelectionObserver::Context::Context(SlideSorter const& rSlideSorter)
  32     : mpSelectionObserver(
  33           rSlideSorter.GetController().GetSelectionManager()->GetSelectionObserver())
  34 {
  35     if (mpSelectionObserver)
  36         mpSelectionObserver->StartObservation();
  37 }
  38
  39 SelectionObserver::Context::~Context() COVERITY_NOEXCEPT_FALSE
  40 {
  41     if (mpSelectionObserver)
  42         mpSelectionObserver->EndObservation();
  43 }
  44
  45 void SelectionObserver::Context::Abort()
  46 {
  47     if (mpSelectionObserver)
  48     {
  49         mpSelectionObserver->AbortObservation();
  50         mpSelectionObserver.reset();
  51     }
  52 }
  53
  54 //===== SelectionObserver =====================================================
  55
  56 SelectionObserver::SelectionObserver(SlideSorter& rSlideSorter)
  57     : mrSlideSorter(rSlideSorter)
  58     , mbIsObservationActive(false)
  59     , mbPageEventOccurred(false)
  60 {
  61 }
  62
  63 SelectionObserver::~SelectionObserver() {}
  64
  65 void SelectionObserver::NotifyPageEvent(const SdrPage* pSdrPage)
  66 {
  67     if (!mbIsObservationActive)
  68         return;
  69
  70     mbPageEventOccurred = true;
  71
  72     const SdPage* pPage = dynamic_cast<const SdPage*>(pSdrPage);
  73     if (pPage == nullptr)
  74         return;
  75
  76     //NotifyPageEvent is called for add, remove, *and* change position so for
  77     //the change position case we must ensure we don't end up with the slide
  78     //duplicated in our list
  79     std::vector<const SdPage*>::iterator iPage(
  80         std::find(maInsertedPages.begin(), maInsertedPages.end(), pPage));
  81     if (iPage != maInsertedPages.end())
  82         maInsertedPages.erase(iPage);
  83
  84     if (pPage->IsInserted())
  85         maInsertedPages.push_back(pPage);
  86 }
  87
  88 void SelectionObserver::StartObservation()
  89 {
  90     OSL_ASSERT(!mbIsObservationActive);
  91     maInsertedPages.clear();
  92     mbIsObservationActive = true;
  93 }
  94
  95 void SelectionObserver::AbortObservation()
  96 {
  97     OSL_ASSERT(mbIsObservationActive);
  98     mbIsObservationActive = false;
  99     maInsertedPages.clear();
 100 }
 101
 102 void SelectionObserver::EndObservation()
 103 {
 104     OSL_ASSERT(mbIsObservationActive);
 105     mbIsObservationActive = false;
 106
 107     if (!mbPageEventOccurred)
 108         return;
 109
 110     PageSelector& rSelector(mrSlideSorter.GetController().GetPageSelector());
 111     PageSelector::UpdateLock aUpdateLock(mrSlideSorter);
 112     rSelector.DeselectAllPages();
 113     if (!maInsertedPages.empty())
 114     {
 115         // Select the inserted pages.
 116         for (const auto& rpPage : maInsertedPages)
 117         {
 118             rSelector.SelectPage(rpPage);
 119         }
 120         maInsertedPages.clear();
 121     }
 122
 123     aUpdateLock.Release();
 124     FocusManager& rFocusManager = mrSlideSorter.GetController().GetFocusManager();
 125     bool bSuccess = rFocusManager.SetFocusedPageFromCurrentPage();
 126     // tdf#129346 nothing currently selected, select something, if possible
 127     // but (tdf#129346) only if setting focus to current page failed
 128     if (rSelector.GetPageCount() && rSelector.GetSelectedPageCount() == 0)
 129     {
 130         if (bSuccess)
 131             rSelector.SelectPage(rFocusManager.GetFocusedPageDescriptor());
 132         else
 133             rSelector.SelectPage(0);
 134     }
 135 }
 136
 137 } // end of namespace ::sd::slidesorter::controller
 138
 139 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */