1 files changed, 245 insertions, 0 deletions
diff --git a/sd/source/ui/slidesorter/controller/SlsFocusManager.cxx b/sd/source/ui/slidesorter/controller/SlsFocusManager.cxx
new file mode 100644
index 000000000..59027f5a8
--- /dev/null
+++ b/sd/source/ui/slidesorter/controller/SlsFocusManager.cxx
@@ -0,0 +1,245 @@
+/* -*- 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/SlsFocusManager.hxx>
+
+#include <SlideSorter.hxx>
+#include <controller/SlideSorterController.hxx>
+#include <controller/SlsCurrentSlideManager.hxx>
+#include <controller/SlsVisibleAreaManager.hxx>
+#include <model/SlideSorterModel.hxx>
+#include <model/SlsPageDescriptor.hxx>
+#include <view/SlideSorterView.hxx>
+#include <view/SlsLayouter.hxx>
+#include <osl/diagnose.h>
+
+#include <Window.hxx>
+#include <sdpage.hxx>
+
+namespace sd::slidesorter::controller {
+
+FocusManager::FocusManager (SlideSorter& rSlideSorter)
+    : mrSlideSorter(rSlideSorter),
+      mnPageIndex(0),
+      mbPageIsFocused(false)
+{
+    if (mrSlideSorter.GetModel().GetPageCount() > 0)
+        mnPageIndex = 0;
+}
+
+FocusManager::~FocusManager()
+{
+}
+
+void FocusManager::MoveFocus (FocusMoveDirection eDirection)
+{
+    if (!(mnPageIndex >= 0 && mbPageIsFocused))
+        return;
+
+    HideFocusIndicator (GetFocusedPageDescriptor());
+
+    const sal_Int32 nColumnCount (mrSlideSorter.GetView().GetLayouter().GetColumnCount());
+    const sal_Int32 nPageCount (mrSlideSorter.GetModel().GetPageCount());
+    switch (eDirection)
+    {
+        case FocusMoveDirection::Left:
+            if (mnPageIndex > 0)
+                mnPageIndex -= 1;
+            break;
+
+        case FocusMoveDirection::Right:
+            if (mnPageIndex < nPageCount-1)
+                mnPageIndex += 1;
+            break;
+
+        case FocusMoveDirection::Up:
+        {
+            const sal_Int32 nCandidate (mnPageIndex - nColumnCount);
+            if (nCandidate >= 0)
+            {
+                // Move the focus the previous row.
+                mnPageIndex = nCandidate;
+            }
+        }
+        break;
+
+        case FocusMoveDirection::Down:
+        {
+            const sal_Int32 nCandidate (mnPageIndex + nColumnCount);
+            if (nCandidate < nPageCount)
+            {
+                // Move the focus to the next row.
+                mnPageIndex = nCandidate;
+            }
+        }
+        break;
+    }
+
+    if (mnPageIndex < 0)
+    {
+        OSL_ASSERT(mnPageIndex>=0);
+        mnPageIndex = 0;
+    }
+    else if (mnPageIndex >= nPageCount)
+    {
+        OSL_ASSERT(mnPageIndex<nPageCount);
+        mnPageIndex = nPageCount - 1;
+    }
+
+    if (mbPageIsFocused)
+    {
+        ShowFocusIndicator(GetFocusedPageDescriptor(), true);
+    }
+}
+
+void FocusManager::ShowFocus (const bool bScrollToFocus)
+{
+    mbPageIsFocused = true;
+    ShowFocusIndicator(GetFocusedPageDescriptor(), bScrollToFocus);
+}
+
+void FocusManager::HideFocus()
+{
+    mbPageIsFocused = false;
+    HideFocusIndicator(GetFocusedPageDescriptor());
+}
+
+bool FocusManager::ToggleFocus()
+{
+    if (mnPageIndex >= 0)
+    {
+        if (mbPageIsFocused)
+            HideFocus ();
+        else
+            ShowFocus ();
+    }
+    return mbPageIsFocused;
+}
+
+bool FocusManager::HasFocus() const
+{
+    return mrSlideSorter.GetContentWindow()->HasFocus();
+}
+
+model::SharedPageDescriptor FocusManager::GetFocusedPageDescriptor() const
+{
+    return mrSlideSorter.GetModel().GetPageDescriptor(mnPageIndex);
+}
+
+bool FocusManager::SetFocusedPage (const model::SharedPageDescriptor& rpDescriptor)
+{
+    if (rpDescriptor)
+    {
+        FocusHider aFocusHider (*this);
+        mnPageIndex = (rpDescriptor->GetPage()->GetPageNum()-1)/2;
+        return true;
+    }
+    return false;
+}
+
+void FocusManager::SetFocusedPage (sal_Int32 nPageIndex)
+{
+    FocusHider aFocusHider (*this);
+    mnPageIndex = nPageIndex;
+}
+
+bool FocusManager::SetFocusedPageToCurrentPage()
+{
+    return SetFocusedPage(mrSlideSorter.GetController().GetCurrentSlideManager()->GetCurrentSlide());
+}
+
+bool FocusManager::IsFocusShowing() const
+{
+    return HasFocus() && mbPageIsFocused;
+}
+
+void FocusManager::HideFocusIndicator (const model::SharedPageDescriptor& rpDescriptor)
+{
+    if (rpDescriptor)
+    {
+        mrSlideSorter.GetView().SetState(rpDescriptor, model::PageDescriptor::ST_Focused, false);
+
+        // Hide focus should also fire the focus event, Currently, only accessibility add the focus listener
+        NotifyFocusChangeListeners();
+    }
+}
+
+void FocusManager::ShowFocusIndicator (
+    const model::SharedPageDescriptor& rpDescriptor,
+    const bool bScrollToFocus)
+{
+    if (!rpDescriptor)
+        return;
+
+    mrSlideSorter.GetView().SetState(rpDescriptor, model::PageDescriptor::ST_Focused, true);
+
+    if (bScrollToFocus)
+    {
+        // Scroll the focused page object into the visible area and repaint
+        // it, so that the focus indicator becomes visible.
+        mrSlideSorter.GetController().GetVisibleAreaManager().RequestVisible(rpDescriptor,true);
+    }
+    mrSlideSorter.GetView().RequestRepaint(rpDescriptor);
+
+    NotifyFocusChangeListeners();
+}
+
+void FocusManager::AddFocusChangeListener (const Link<LinkParamNone*,void>& rListener)
+{
+    if (::std::find (maFocusChangeListeners.begin(), maFocusChangeListeners.end(), rListener)
+        == maFocusChangeListeners.end())
+    {
+        maFocusChangeListeners.push_back (rListener);
+    }
+}
+
+void FocusManager::RemoveFocusChangeListener (const Link<LinkParamNone*,void>& rListener)
+{
+    maFocusChangeListeners.erase (
+        ::std::find (maFocusChangeListeners.begin(), maFocusChangeListeners.end(), rListener));
+}
+
+void FocusManager::NotifyFocusChangeListeners() const
+{
+    // Create a copy of the listener list to be safe when that is modified.
+    ::std::vector<Link<LinkParamNone*,void>> aListeners (maFocusChangeListeners);
+
+    // Tell the selection change listeners that the selection has changed.
+    for (const auto& rListener : aListeners)
+    {
+        rListener.Call(nullptr);
+    }
+}
+
+FocusManager::FocusHider::FocusHider (FocusManager& rManager)
+: mbFocusVisible(rManager.IsFocusShowing())
+, mrManager(rManager)
+{
+    mrManager.HideFocus();
+}
+
+FocusManager::FocusHider::~FocusHider() COVERITY_NOEXCEPT_FALSE
+{
+    if (mbFocusVisible)
+        mrManager.ShowFocus();
+}
+
+} // end of namespace ::sd::slidesorter::controller
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */