sd/source/ui/slidesorter/controller/SlsInsertionIndicatorHandler.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.
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   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 <controller/SlsInsertionIndicatorHandler.hxx>
  21 #include <controller/SlsProperties.hxx>
  22 #include <view/SlideSorterView.hxx>
  23 #include <view/SlsLayouter.hxx>
  24 #include <view/SlsInsertAnimator.hxx>
  25 #include <view/SlsInsertionIndicatorOverlay.hxx>
  26 #include <model/SlideSorterModel.hxx>
  27 #include <model/SlsPageEnumerationProvider.hxx>
  28 #include <com/sun/star/datatransfer/dnd/DNDConstants.hpp>
  29
  30 #include <SlideSorter.hxx>
  31
  32 using namespace ::com::sun::star::datatransfer::dnd::DNDConstants;
  33
  34 namespace sd { namespace slidesorter { namespace controller {
  35
  36 InsertionIndicatorHandler::InsertionIndicatorHandler (SlideSorter& rSlideSorter)
  37     : mrSlideSorter(rSlideSorter),
  38       mpInsertAnimator(),
  39       mpInsertionIndicatorOverlay(new view::InsertionIndicatorOverlay(rSlideSorter)),
  40       maInsertPosition(),
  41       meMode(MoveMode),
  42       mbIsInsertionTrivial(false),
  43       mbIsActive(false),
  44       mbIsReadOnly(mrSlideSorter.GetModel().IsReadOnly()),
  45       mbIsOverSourceView(true),
  46       maIconSize(0,0),
  47       mbIsForcedShow(false)
  48 {
  49 }
  50
  51 InsertionIndicatorHandler::~InsertionIndicatorHandler() COVERITY_NOEXCEPT_FALSE
  52 {
  53 }
  54
  55 void InsertionIndicatorHandler::Start (const bool bIsOverSourceView)
  56 {
  57     if (mbIsActive)
  58     {
  59         OSL_ASSERT(!mbIsActive);
  60     }
  61
  62     mbIsReadOnly = mrSlideSorter.GetModel().IsReadOnly();
  63     if (mbIsReadOnly)
  64         return;
  65
  66     mbIsActive = true;
  67     mbIsOverSourceView = bIsOverSourceView;
  68 }
  69
  70 void InsertionIndicatorHandler::End (const controller::Animator::AnimationMode eMode)
  71 {
  72     if (mbIsForcedShow ||  ! mbIsActive || mbIsReadOnly)
  73         return;
  74
  75     GetInsertAnimator()->Reset(eMode);
  76
  77     mbIsActive = false;
  78     //    maInsertPosition = view::InsertPosition();
  79     meMode = UnknownMode;
  80
  81     mpInsertionIndicatorOverlay->Hide();
  82     mpInsertionIndicatorOverlay.reset(new view::InsertionIndicatorOverlay(mrSlideSorter));
  83 }
  84
  85 void InsertionIndicatorHandler::ForceShow()
  86 {
  87     mbIsForcedShow = true;
  88 }
  89
  90 void InsertionIndicatorHandler::ForceEnd()
  91 {
  92     mbIsForcedShow = false;
  93     End(Animator::AM_Immediate);
  94 }
  95
  96 void InsertionIndicatorHandler::UpdateIndicatorIcon (const SdTransferable* pTransferable)
  97 {
  98     mpInsertionIndicatorOverlay->Create(pTransferable);
  99     maIconSize = mpInsertionIndicatorOverlay->GetSize();
 100 }
 101
 102 InsertionIndicatorHandler::Mode InsertionIndicatorHandler::GetModeFromDndAction (
 103     const sal_Int8 nDndAction)
 104 {
 105     if ((nDndAction & ACTION_MOVE) != 0)
 106         return MoveMode;
 107     else if ((nDndAction & ACTION_COPY) != 0)
 108         return CopyMode;
 109     else
 110         return UnknownMode;
 111 }
 112
 113 void InsertionIndicatorHandler::UpdatePosition (
 114     const Point& rMouseModelPosition,
 115     const Mode eMode)
 116 {
 117     if ( ! mbIsActive)
 118         return;
 119
 120     if (mbIsReadOnly)
 121         return;
 122
 123     SetPosition(rMouseModelPosition, eMode);
 124 }
 125
 126 void InsertionIndicatorHandler::UpdatePosition (
 127     const Point& rMouseModelPosition,
 128     const sal_Int8 nDndAction)
 129 {
 130     UpdatePosition(rMouseModelPosition, GetModeFromDndAction(nDndAction));
 131 }
 132
 133 sal_Int32 InsertionIndicatorHandler::GetInsertionPageIndex() const
 134 {
 135     if (mbIsReadOnly)
 136         return -1;
 137     else
 138         return maInsertPosition.GetIndex();
 139 }
 140
 141 void InsertionIndicatorHandler::SetPosition (
 142     const Point& rPoint,
 143     const Mode eMode)
 144 {
 145     view::Layouter& rLayouter (mrSlideSorter.GetView().GetLayouter());
 146
 147     const view::InsertPosition aInsertPosition (rLayouter.GetInsertPosition(
 148         rPoint,
 149         maIconSize,
 150         mrSlideSorter.GetModel()));
 151
 152     if (maInsertPosition == aInsertPosition && meMode == eMode)
 153         return;
 154
 155     maInsertPosition = aInsertPosition;
 156     meMode = eMode;
 157     mbIsInsertionTrivial = IsInsertionTrivial(maInsertPosition.GetIndex(), eMode);
 158     if (maInsertPosition.GetIndex()>=0 && ! mbIsInsertionTrivial)
 159     {
 160         mpInsertionIndicatorOverlay->SetLocation(maInsertPosition.GetLocation());
 161
 162         GetInsertAnimator()->SetInsertPosition(maInsertPosition);
 163         mpInsertionIndicatorOverlay->Show();
 164     }
 165     else
 166     {
 167         GetInsertAnimator()->Reset(Animator::AM_Animated);
 168         mpInsertionIndicatorOverlay->Hide();
 169     }
 170 }
 171
 172 std::shared_ptr<view::InsertAnimator> const & InsertionIndicatorHandler::GetInsertAnimator()
 173 {
 174     if ( ! mpInsertAnimator)
 175         mpInsertAnimator.reset(new view::InsertAnimator(mrSlideSorter));
 176     return mpInsertAnimator;
 177 }
 178
 179 bool InsertionIndicatorHandler::IsInsertionTrivial (
 180     const sal_Int32 nInsertionIndex,
 181     const Mode eMode) const
 182 {
 183     if (eMode == CopyMode)
 184         return false;
 185     else if (eMode == UnknownMode)
 186         return true;
 187
 188     if ( ! mbIsOverSourceView)
 189         return false;
 190
 191     // Iterate over all selected pages and check whether there are
 192     // holes.  While we do this we remember the indices of the first and
 193     // last selected page as preparation for the next step.
 194     sal_Int32 nCurrentIndex = -1;
 195     sal_Int32 nFirstIndex = -1;
 196     sal_Int32 nLastIndex = -1;
 197     model::PageEnumeration aSelectedPages (
 198         model::PageEnumerationProvider::CreateSelectedPagesEnumeration(
 199             mrSlideSorter.GetModel()));
 200     while (aSelectedPages.HasMoreElements())
 201     {
 202         model::SharedPageDescriptor pDescriptor (aSelectedPages.GetNextElement());
 203
 204         // Get the page number and compare it to the last one.
 205         const sal_Int32 nPageNumber (pDescriptor->GetPageIndex());
 206         if (nCurrentIndex>=0 && nPageNumber>(nCurrentIndex+1))
 207             return false;
 208         else
 209             nCurrentIndex = nPageNumber;
 210
 211         // Remember indices of the first and last page of the selection.
 212         if (nFirstIndex == -1)
 213             nFirstIndex = nPageNumber;
 214         nLastIndex = nPageNumber;
 215     }
 216
 217     // When we come here then the selection has no holes.  We still have
 218     // to check that the insertion position is not directly in front or
 219     // directly behind the selection and thus moving the selection there
 220     // would not change the model.
 221     return nInsertionIndex >= nFirstIndex && nInsertionIndex <= (nLastIndex+1);
 222 }
 223
 224 bool InsertionIndicatorHandler::IsInsertionTrivial (const sal_Int8 nDndAction)
 225 {
 226     return IsInsertionTrivial(GetInsertionPageIndex(), GetModeFromDndAction(nDndAction));
 227 }
 228
 229 //===== InsertionIndicatorHandler::ForceShowContext ===========================
 230
 231 InsertionIndicatorHandler::ForceShowContext::ForceShowContext (
 232     const std::shared_ptr<InsertionIndicatorHandler>& rpHandler)
 233     : mpHandler(rpHandler)
 234 {
 235     mpHandler->ForceShow();
 236 }
 237
 238 InsertionIndicatorHandler::ForceShowContext::~ForceShowContext() COVERITY_NOEXCEPT_FALSE
 239 {
 240     mpHandler->ForceEnd();
 241 }
 242
 243 } } } // end of namespace ::sd::slidesorter::controller
 244
 245 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */