1 files changed, 243 insertions, 0 deletions
diff --git a/sd/source/ui/slidesorter/controller/SlsInsertionIndicatorHandler.cxx b/sd/source/ui/slidesorter/controller/SlsInsertionIndicatorHandler.cxx
new file mode 100644
index 000000000..ff1a05ef1
--- /dev/null
+++ b/sd/source/ui/slidesorter/controller/SlsInsertionIndicatorHandler.cxx
@@ -0,0 +1,243 @@
+/* -*- 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 <controller/SlsInsertionIndicatorHandler.hxx>
+#include <view/SlideSorterView.hxx>
+#include <view/SlsLayouter.hxx>
+#include <view/SlsInsertAnimator.hxx>
+#include <view/SlsInsertionIndicatorOverlay.hxx>
+#include <model/SlideSorterModel.hxx>
+#include <model/SlsPageEnumerationProvider.hxx>
+#include <com/sun/star/datatransfer/dnd/DNDConstants.hpp>
+#include <osl/diagnose.h>
+
+#include <SlideSorter.hxx>
+
+using namespace ::com::sun::star::datatransfer::dnd::DNDConstants;
+
+namespace sd::slidesorter::controller {
+
+InsertionIndicatorHandler::InsertionIndicatorHandler (SlideSorter& rSlideSorter)
+    : mrSlideSorter(rSlideSorter),
+      mpInsertionIndicatorOverlay(std::make_shared<view::InsertionIndicatorOverlay>(rSlideSorter)),
+      meMode(MoveMode),
+      mbIsInsertionTrivial(false),
+      mbIsActive(false),
+      mbIsReadOnly(mrSlideSorter.GetModel().IsReadOnly()),
+      mbIsOverSourceView(true),
+      maIconSize(0,0),
+      mbIsForcedShow(false)
+{
+}
+
+InsertionIndicatorHandler::~InsertionIndicatorHandler() COVERITY_NOEXCEPT_FALSE
+{
+}
+
+void InsertionIndicatorHandler::Start (const bool bIsOverSourceView)
+{
+    if (mbIsActive)
+    {
+        OSL_ASSERT(!mbIsActive);
+    }
+
+    mbIsReadOnly = mrSlideSorter.GetModel().IsReadOnly();
+    if (mbIsReadOnly)
+        return;
+
+    mbIsActive = true;
+    mbIsOverSourceView = bIsOverSourceView;
+}
+
+void InsertionIndicatorHandler::End (const controller::Animator::AnimationMode eMode)
+{
+    if (mbIsForcedShow ||  ! mbIsActive || mbIsReadOnly)
+        return;
+
+    GetInsertAnimator()->Reset(eMode);
+
+    mbIsActive = false;
+    //    maInsertPosition = view::InsertPosition();
+    meMode = UnknownMode;
+
+    mpInsertionIndicatorOverlay->Hide();
+    mpInsertionIndicatorOverlay = std::make_shared<view::InsertionIndicatorOverlay>(mrSlideSorter);
+}
+
+void InsertionIndicatorHandler::ForceShow()
+{
+    mbIsForcedShow = true;
+}
+
+void InsertionIndicatorHandler::ForceEnd()
+{
+    mbIsForcedShow = false;
+    End(Animator::AM_Immediate);
+}
+
+void InsertionIndicatorHandler::UpdateIndicatorIcon (const SdTransferable* pTransferable)
+{
+    mpInsertionIndicatorOverlay->Create(pTransferable);
+    maIconSize = mpInsertionIndicatorOverlay->GetSize();
+}
+
+InsertionIndicatorHandler::Mode InsertionIndicatorHandler::GetModeFromDndAction (
+    const sal_Int8 nDndAction)
+{
+    if ((nDndAction & ACTION_MOVE) != 0)
+        return MoveMode;
+    else if ((nDndAction & ACTION_COPY) != 0)
+        return CopyMode;
+    else
+        return UnknownMode;
+}
+
+void InsertionIndicatorHandler::UpdatePosition (
+    const Point& rMouseModelPosition,
+    const Mode eMode)
+{
+    if ( ! mbIsActive)
+        return;
+
+    if (mbIsReadOnly)
+        return;
+
+    SetPosition(rMouseModelPosition, eMode);
+}
+
+void InsertionIndicatorHandler::UpdatePosition (
+    const Point& rMouseModelPosition,
+    const sal_Int8 nDndAction)
+{
+    UpdatePosition(rMouseModelPosition, GetModeFromDndAction(nDndAction));
+}
+
+sal_Int32 InsertionIndicatorHandler::GetInsertionPageIndex() const
+{
+    if (mbIsReadOnly)
+        return -1;
+    else
+        return maInsertPosition.GetIndex();
+}
+
+void InsertionIndicatorHandler::SetPosition (
+    const Point& rPoint,
+    const Mode eMode)
+{
+    view::Layouter& rLayouter (mrSlideSorter.GetView().GetLayouter());
+
+    const view::InsertPosition aInsertPosition (rLayouter.GetInsertPosition(
+        rPoint,
+        maIconSize,
+        mrSlideSorter.GetModel()));
+
+    if (maInsertPosition == aInsertPosition && meMode == eMode)
+        return;
+
+    maInsertPosition = aInsertPosition;
+    meMode = eMode;
+    mbIsInsertionTrivial = IsInsertionTrivial(maInsertPosition.GetIndex(), eMode);
+    if (maInsertPosition.GetIndex()>=0 && ! mbIsInsertionTrivial)
+    {
+        mpInsertionIndicatorOverlay->SetLocation(maInsertPosition.GetLocation());
+
+        GetInsertAnimator()->SetInsertPosition(maInsertPosition);
+        mpInsertionIndicatorOverlay->Show();
+    }
+    else
+    {
+        GetInsertAnimator()->Reset(Animator::AM_Animated);
+        mpInsertionIndicatorOverlay->Hide();
+    }
+}
+
+std::shared_ptr<view::InsertAnimator> const & InsertionIndicatorHandler::GetInsertAnimator()
+{
+    if ( ! mpInsertAnimator)
+        mpInsertAnimator = std::make_shared<view::InsertAnimator>(mrSlideSorter);
+    return mpInsertAnimator;
+}
+
+bool InsertionIndicatorHandler::IsInsertionTrivial (
+    const sal_Int32 nInsertionIndex,
+    const Mode eMode) const
+{
+    if (eMode == CopyMode)
+        return false;
+    else if (eMode == UnknownMode)
+        return true;
+
+    if ( ! mbIsOverSourceView)
+        return false;
+
+    // Iterate over all selected pages and check whether there are
+    // holes.  While we do this we remember the indices of the first and
+    // last selected page as preparation for the next step.
+    sal_Int32 nCurrentIndex = -1;
+    sal_Int32 nFirstIndex = -1;
+    sal_Int32 nLastIndex = -1;
+    model::PageEnumeration aSelectedPages (
+        model::PageEnumerationProvider::CreateSelectedPagesEnumeration(
+            mrSlideSorter.GetModel()));
+    while (aSelectedPages.HasMoreElements())
+    {
+        model::SharedPageDescriptor pDescriptor (aSelectedPages.GetNextElement());
+
+        // Get the page number and compare it to the last one.
+        const sal_Int32 nPageNumber (pDescriptor->GetPageIndex());
+        if (nCurrentIndex>=0 && nPageNumber>(nCurrentIndex+1))
+            return false;
+        else
+            nCurrentIndex = nPageNumber;
+
+        // Remember indices of the first and last page of the selection.
+        if (nFirstIndex == -1)
+            nFirstIndex = nPageNumber;
+        nLastIndex = nPageNumber;
+    }
+
+    // When we come here then the selection has no holes.  We still have
+    // to check that the insertion position is not directly in front or
+    // directly behind the selection and thus moving the selection there
+    // would not change the model.
+    return nInsertionIndex >= nFirstIndex && nInsertionIndex <= (nLastIndex+1);
+}
+
+bool InsertionIndicatorHandler::IsInsertionTrivial (const sal_Int8 nDndAction)
+{
+    return IsInsertionTrivial(GetInsertionPageIndex(), GetModeFromDndAction(nDndAction));
+}
+
+//===== InsertionIndicatorHandler::ForceShowContext ===========================
+
+InsertionIndicatorHandler::ForceShowContext::ForceShowContext (
+    const std::shared_ptr<InsertionIndicatorHandler>& rpHandler)
+    : mpHandler(rpHandler)
+{
+    mpHandler->ForceShow();
+}
+
+InsertionIndicatorHandler::ForceShowContext::~ForceShowContext() COVERITY_NOEXCEPT_FALSE
+{
+    mpHandler->ForceEnd();
+}
+
+} // end of namespace ::sd::slidesorter::controller
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */