1 files changed, 962 insertions, 0 deletions
diff --git a/sd/source/ui/accessibility/AccessibleSlideSorterView.cxx b/sd/source/ui/accessibility/AccessibleSlideSorterView.cxx
new file mode 100644
index 0000000000..7ab8b0d033
--- /dev/null
+++ b/sd/source/ui/accessibility/AccessibleSlideSorterView.cxx
@@ -0,0 +1,962 @@
+/* -*- 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 <AccessibleSlideSorterView.hxx>
+#include <AccessibleSlideSorterObject.hxx>
+
+#include <SlideSorter.hxx>
+#include <controller/SlideSorterController.hxx>
+#include <controller/SlsPageSelector.hxx>
+#include <controller/SlsFocusManager.hxx>
+#include <controller/SlsSelectionManager.hxx>
+#include <view/SlideSorterView.hxx>
+#include <model/SlideSorterModel.hxx>
+#include <model/SlsPageDescriptor.hxx>
+
+#include <ViewShell.hxx>
+#include <ViewShellHint.hxx>
+#include <sdpage.hxx>
+#include <drawdoc.hxx>
+
+#include <sdresid.hxx>
+#include <strings.hrc>
+#include <com/sun/star/accessibility/AccessibleRole.hpp>
+#include <com/sun/star/accessibility/AccessibleEventId.hpp>
+#include <com/sun/star/accessibility/AccessibleStateType.hpp>
+#include <com/sun/star/lang/IndexOutOfBoundsException.hpp>
+#include <comphelper/accessibleeventnotifier.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <o3tl/safeint.hxx>
+#include <rtl/ref.hxx>
+#include <sal/log.hxx>
+#include <i18nlangtag/languagetag.hxx>
+
+#include <vcl/settings.hxx>
+#include <vcl/svapp.hxx>
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::accessibility;
+
+namespace accessibility {
+
+/** Inner implementation class of the AccessibleSlideSorterView.
+
+    Note that some event broadcasting is done asynchronously because
+    otherwise it could lead to deadlocks on (at least) some Solaris
+    machines.  Probably (but unverified) this can happen on all GTK based
+    systems.  The asynchronous broadcasting is just a workaround for a
+    poorly understood problem.
+*/
+class AccessibleSlideSorterView::Implementation
+    : public SfxListener
+{
+public:
+    Implementation (
+        AccessibleSlideSorterView& rAccessibleSlideSorter,
+        ::sd::slidesorter::SlideSorter& rSlideSorter,
+        vcl::Window* pWindow);
+    virtual ~Implementation() override;
+
+    void RequestUpdateChildren();
+    void Clear();
+    sal_Int32 GetVisibleChildCount() const;
+    AccessibleSlideSorterObject* GetAccessibleChild (sal_Int32 nIndex);
+    AccessibleSlideSorterObject* GetVisibleChild (sal_Int32 nIndex);
+
+    void ConnectListeners();
+    void ReleaseListeners();
+    void Notify (SfxBroadcaster& rBroadcaster, const SfxHint& rHint) override;
+    DECL_LINK(WindowEventListener, VclWindowEvent&, void);
+    DECL_LINK(SelectionChangeListener, LinkParamNone*, void);
+    DECL_LINK(BroadcastSelectionChange, void*, void);
+    DECL_LINK(FocusChangeListener, LinkParamNone*, void);
+    DECL_LINK(VisibilityChangeListener, LinkParamNone*, void);
+    DECL_LINK(UpdateChildrenCallback, void*, void);
+
+    void Activated();
+private:
+    AccessibleSlideSorterView& mrAccessibleSlideSorter;
+    ::sd::slidesorter::SlideSorter& mrSlideSorter;
+    typedef ::std::vector<rtl::Reference<AccessibleSlideSorterObject> > PageObjectList;
+    PageObjectList maPageObjects;
+    sal_Int32 mnFirstVisibleChild;
+    sal_Int32 mnLastVisibleChild;
+    bool mbListeningToDocument;
+    VclPtr<vcl::Window> mpWindow;
+    sal_Int32 mnFocusedIndex;
+    bool mbModelChangeLocked;
+    ImplSVEvent * mnUpdateChildrenUserEventId;
+    ImplSVEvent * mnSelectionChangeUserEventId;
+
+    void UpdateChildren();
+};
+
+//===== AccessibleSlideSorterView =============================================
+
+AccessibleSlideSorterView::AccessibleSlideSorterView(
+    ::sd::slidesorter::SlideSorter& rSlideSorter,
+    vcl::Window* pContentWindow)
+    : AccessibleSlideSorterViewBase(m_aMutex),
+      mrSlideSorter(rSlideSorter),
+      mnClientId(0),
+      mpContentWindow(pContentWindow)
+{
+}
+
+void AccessibleSlideSorterView::Init()
+{
+    mpImpl.reset(new Implementation(*this,mrSlideSorter,mpContentWindow));
+}
+
+AccessibleSlideSorterView::~AccessibleSlideSorterView()
+{
+    Destroyed ();
+}
+
+void AccessibleSlideSorterView::FireAccessibleEvent (
+    short nEventId,
+    const uno::Any& rOldValue,
+    const uno::Any& rNewValue )
+{
+    if (mnClientId != 0)
+    {
+        AccessibleEventObject aEventObject;
+
+        aEventObject.Source = Reference<XWeak>(this);
+        aEventObject.EventId = nEventId;
+        aEventObject.NewValue = rNewValue;
+        aEventObject.OldValue = rOldValue;
+        aEventObject.IndexHint = -1;
+
+        comphelper::AccessibleEventNotifier::addEvent (mnClientId, aEventObject);
+    }
+}
+
+void SAL_CALL AccessibleSlideSorterView::disposing()
+{
+    if (mnClientId != 0)
+    {
+        comphelper::AccessibleEventNotifier::revokeClientNotifyDisposing( mnClientId, *this );
+        mnClientId = 0;
+    }
+    mpImpl.reset();
+}
+
+AccessibleSlideSorterObject* AccessibleSlideSorterView::GetAccessibleChildImplementation (
+    sal_Int32 nIndex)
+{
+    AccessibleSlideSorterObject* pResult = nullptr;
+    ::osl::MutexGuard aGuard (m_aMutex);
+
+    if (nIndex>=0 && nIndex<mpImpl->GetVisibleChildCount())
+        pResult = mpImpl->GetVisibleChild(nIndex);
+
+    return pResult;
+}
+
+void AccessibleSlideSorterView::Destroyed()
+{
+    ::osl::MutexGuard aGuard (m_aMutex);
+
+    // Send a disposing to all listeners.
+    if (mnClientId != 0)
+    {
+        comphelper::AccessibleEventNotifier::revokeClientNotifyDisposing( mnClientId, *this );
+        mnClientId = 0;
+    }
+}
+
+//=====  XAccessible  =========================================================
+
+Reference<XAccessibleContext > SAL_CALL
+    AccessibleSlideSorterView::getAccessibleContext()
+{
+    ThrowIfDisposed ();
+    return this;
+}
+
+//=====  XAccessibleContext  ==================================================
+
+sal_Int64 SAL_CALL AccessibleSlideSorterView::getAccessibleChildCount()
+{
+    ThrowIfDisposed();
+    ::osl::MutexGuard aGuard (m_aMutex);
+    return mpImpl->GetVisibleChildCount();
+}
+
+Reference<XAccessible > SAL_CALL
+    AccessibleSlideSorterView::getAccessibleChild (sal_Int64 nIndex)
+{
+    ThrowIfDisposed();
+    ::osl::MutexGuard aGuard (m_aMutex);
+
+    if (nIndex<0 || nIndex>=mpImpl->GetVisibleChildCount())
+        throw lang::IndexOutOfBoundsException();
+
+    return  mpImpl->GetVisibleChild(nIndex);
+}
+
+Reference<XAccessible > SAL_CALL AccessibleSlideSorterView::getAccessibleParent()
+{
+    ThrowIfDisposed();
+    const SolarMutexGuard aSolarGuard;
+    Reference<XAccessible> xParent;
+
+    if (mpContentWindow != nullptr)
+    {
+        vcl::Window* pParent = mpContentWindow->GetAccessibleParentWindow();
+        if (pParent != nullptr)
+            xParent = pParent->GetAccessible();
+    }
+
+    return xParent;
+}
+
+sal_Int64 SAL_CALL AccessibleSlideSorterView::getAccessibleIndexInParent()
+{
+    OSL_ASSERT(getAccessibleParent().is());
+    ThrowIfDisposed();
+    const SolarMutexGuard aSolarGuard;
+    sal_Int64 nIndexInParent(-1);
+
+    Reference<XAccessibleContext> xParentContext (getAccessibleParent()->getAccessibleContext());
+    if (xParentContext.is())
+    {
+        sal_Int64 nChildCount (xParentContext->getAccessibleChildCount());
+        for (sal_Int64 i=0; i<nChildCount; ++i)
+            if (xParentContext->getAccessibleChild(i).get()
+                    == static_cast<XAccessible*>(this))
+            {
+                nIndexInParent = i;
+                break;
+            }
+    }
+
+    return nIndexInParent;
+}
+
+sal_Int16 SAL_CALL AccessibleSlideSorterView::getAccessibleRole()
+{
+    ThrowIfDisposed();
+    return AccessibleRole::DOCUMENT;
+}
+
+OUString SAL_CALL AccessibleSlideSorterView::getAccessibleDescription()
+{
+    ThrowIfDisposed();
+    SolarMutexGuard aGuard;
+
+    return SdResId(SID_SD_A11Y_I_SLIDEVIEW_D);
+}
+
+OUString SAL_CALL AccessibleSlideSorterView::getAccessibleName()
+{
+    ThrowIfDisposed();
+    SolarMutexGuard aGuard;
+
+    return SdResId(SID_SD_A11Y_I_SLIDEVIEW_N);
+}
+
+Reference<XAccessibleRelationSet> SAL_CALL
+    AccessibleSlideSorterView::getAccessibleRelationSet()
+{
+    return Reference<XAccessibleRelationSet>();
+}
+
+sal_Int64 SAL_CALL AccessibleSlideSorterView::getAccessibleStateSet()
+{
+    ThrowIfDisposed();
+    const SolarMutexGuard aSolarGuard;
+    sal_Int64 nStateSet = 0;
+
+    nStateSet |= AccessibleStateType::FOCUSABLE;
+    nStateSet |= AccessibleStateType::SELECTABLE;
+    nStateSet |= AccessibleStateType::ENABLED;
+    nStateSet |= AccessibleStateType::ACTIVE;
+    nStateSet |= AccessibleStateType::MULTI_SELECTABLE;
+    nStateSet |= AccessibleStateType::OPAQUE;
+    if (mpContentWindow!=nullptr)
+    {
+        if (mpContentWindow->IsVisible())
+            nStateSet |= AccessibleStateType::VISIBLE;
+        if (mpContentWindow->IsReallyVisible())
+            nStateSet |= AccessibleStateType::SHOWING;
+    }
+
+    return nStateSet;
+}
+
+lang::Locale SAL_CALL AccessibleSlideSorterView::getLocale()
+{
+    ThrowIfDisposed ();
+    Reference<XAccessibleContext> xParentContext;
+    Reference<XAccessible> xParent (getAccessibleParent());
+    if (xParent.is())
+        xParentContext = xParent->getAccessibleContext();
+
+    if (xParentContext.is())
+        return xParentContext->getLocale();
+    else
+        // Strange, no parent!  Anyway, return the default locale.
+        return Application::GetSettings().GetLanguageTag().getLocale();
+}
+
+void SAL_CALL AccessibleSlideSorterView::addAccessibleEventListener(
+    const Reference<XAccessibleEventListener >& rxListener)
+{
+    if (!rxListener.is())
+        return;
+
+    const osl::MutexGuard aGuard(m_aMutex);
+
+    if (rBHelper.bDisposed || rBHelper.bInDispose)
+    {
+        uno::Reference<uno::XInterface> x (static_cast<lang::XComponent *>(this), uno::UNO_QUERY);
+        rxListener->disposing (lang::EventObject (x));
+    }
+    else
+    {
+        if ( ! mnClientId)
+            mnClientId = comphelper::AccessibleEventNotifier::registerClient();
+        comphelper::AccessibleEventNotifier::addEventListener(mnClientId, rxListener);
+    }
+}
+
+void SAL_CALL AccessibleSlideSorterView::removeAccessibleEventListener(
+    const Reference<XAccessibleEventListener >& rxListener)
+{
+    ThrowIfDisposed();
+    if (!rxListener.is())
+        return;
+
+    const osl::MutexGuard aGuard(m_aMutex);
+
+    if (mnClientId == 0)
+        return;
+
+    sal_Int32 nListenerCount = comphelper::AccessibleEventNotifier::removeEventListener(
+        mnClientId, rxListener );
+    if ( !nListenerCount )
+    {
+        // no listeners anymore -> revoke ourself. This may lead to
+        // the notifier thread dying (if we were the last client),
+        // and at least to us not firing any events anymore, in case
+        // somebody calls NotifyAccessibleEvent, again
+        comphelper::AccessibleEventNotifier::revokeClient( mnClientId );
+        mnClientId = 0;
+    }
+}
+
+//===== XAccessibleComponent ==================================================
+
+sal_Bool SAL_CALL AccessibleSlideSorterView::containsPoint (const awt::Point& aPoint)
+{
+    ThrowIfDisposed();
+    const awt::Rectangle aBBox (getBounds());
+    return (aPoint.X >= 0)
+        && (aPoint.X < aBBox.Width)
+        && (aPoint.Y >= 0)
+        && (aPoint.Y < aBBox.Height);
+}
+
+Reference<XAccessible> SAL_CALL
+    AccessibleSlideSorterView::getAccessibleAtPoint (const awt::Point& aPoint)
+{
+    ThrowIfDisposed();
+    Reference<XAccessible> xAccessible;
+    const SolarMutexGuard aSolarGuard;
+
+    const Point aTestPoint (aPoint.X, aPoint.Y);
+    ::sd::slidesorter::model::SharedPageDescriptor pHitDescriptor (
+        mrSlideSorter.GetController().GetPageAt(aTestPoint));
+    if (pHitDescriptor)
+        xAccessible = mpImpl->GetAccessibleChild(
+            (pHitDescriptor->GetPage()->GetPageNum()-1)/2);
+
+    return xAccessible;
+}
+
+awt::Rectangle SAL_CALL AccessibleSlideSorterView::getBounds()
+{
+    ThrowIfDisposed();
+    const SolarMutexGuard aSolarGuard;
+    awt::Rectangle aBBox;
+
+    if (mpContentWindow != nullptr)
+    {
+        const Point aPosition (mpContentWindow->GetPosPixel());
+        const Size aSize (mpContentWindow->GetOutputSizePixel());
+
+        aBBox.X = aPosition.X();
+        aBBox.Y = aPosition.Y();
+        aBBox.Width = aSize.Width();
+        aBBox.Height = aSize.Height();
+    }
+
+    return aBBox;
+}
+
+awt::Point SAL_CALL AccessibleSlideSorterView::getLocation()
+{
+    ThrowIfDisposed();
+    awt::Point aLocation;
+
+    if (mpContentWindow != nullptr)
+    {
+        const Point aPosition (mpContentWindow->GetPosPixel());
+        aLocation.X = aPosition.X();
+        aLocation.Y = aPosition.Y();
+    }
+
+    return aLocation;
+}
+
+/** Calculate the location on screen from the parent's location on screen
+    and our own relative location.
+*/
+awt::Point SAL_CALL AccessibleSlideSorterView::getLocationOnScreen()
+{
+    ThrowIfDisposed();
+    const SolarMutexGuard aSolarGuard;
+    awt::Point aParentLocationOnScreen;
+
+    Reference<XAccessible> xParent (getAccessibleParent());
+    if (xParent.is())
+    {
+        Reference<XAccessibleComponent> xParentComponent (
+            xParent->getAccessibleContext(), uno::UNO_QUERY);
+        if (xParentComponent.is())
+            aParentLocationOnScreen = xParentComponent->getLocationOnScreen();
+    }
+
+    awt::Point aLocationOnScreen (getLocation());
+    aLocationOnScreen.X += aParentLocationOnScreen.X;
+    aLocationOnScreen.Y += aParentLocationOnScreen.Y;
+
+    return aLocationOnScreen;
+}
+
+awt::Size SAL_CALL AccessibleSlideSorterView::getSize()
+{
+    ThrowIfDisposed();
+    awt::Size aSize;
+
+    if (mpContentWindow != nullptr)
+    {
+        const Size aOutputSize (mpContentWindow->GetOutputSizePixel());
+        aSize.Width = aOutputSize.Width();
+        aSize.Height = aOutputSize.Height();
+    }
+
+    return aSize;
+}
+
+void SAL_CALL AccessibleSlideSorterView::grabFocus()
+{
+    ThrowIfDisposed();
+    const SolarMutexGuard aSolarGuard;
+
+    if (mpContentWindow)
+        mpContentWindow->GrabFocus();
+}
+
+sal_Int32 SAL_CALL AccessibleSlideSorterView::getForeground()
+{
+    ThrowIfDisposed();
+    svtools::ColorConfig aColorConfig;
+    Color nColor = aColorConfig.GetColorValue( svtools::FONTCOLOR ).nColor;
+    return static_cast<sal_Int32>(nColor);
+}
+
+sal_Int32 SAL_CALL AccessibleSlideSorterView::getBackground()
+{
+    ThrowIfDisposed();
+    Color nColor = Application::GetSettings().GetStyleSettings().GetWindowColor();
+    return sal_Int32(nColor);
+}
+
+//===== XAccessibleSelection ==================================================
+
+void SAL_CALL AccessibleSlideSorterView::selectAccessibleChild (sal_Int64 nChildIndex)
+{
+    ThrowIfDisposed();
+    const SolarMutexGuard aSolarGuard;
+
+    if (nChildIndex < 0 || nChildIndex >= getAccessibleChildCount())
+        throw lang::IndexOutOfBoundsException();
+
+    AccessibleSlideSorterObject* pChild = mpImpl->GetAccessibleChild(nChildIndex);
+    if (pChild == nullptr)
+        throw lang::IndexOutOfBoundsException();
+
+    mrSlideSorter.GetController().GetPageSelector().SelectPage(pChild->GetPageNumber());
+}
+
+sal_Bool SAL_CALL AccessibleSlideSorterView::isAccessibleChildSelected (sal_Int64 nChildIndex)
+{
+    ThrowIfDisposed();
+    bool bIsSelected = false;
+    const SolarMutexGuard aSolarGuard;
+
+    if (nChildIndex < 0 || nChildIndex >= getAccessibleChildCount())
+        throw lang::IndexOutOfBoundsException();
+
+    AccessibleSlideSorterObject* pChild = mpImpl->GetAccessibleChild(nChildIndex);
+    if (pChild == nullptr)
+        throw lang::IndexOutOfBoundsException();
+
+    bIsSelected = mrSlideSorter.GetController().GetPageSelector().IsPageSelected(
+        pChild->GetPageNumber());
+
+    return bIsSelected;
+}
+
+void SAL_CALL AccessibleSlideSorterView::clearAccessibleSelection()
+{
+    ThrowIfDisposed();
+    const SolarMutexGuard aSolarGuard;
+
+    mrSlideSorter.GetController().GetPageSelector().DeselectAllPages();
+}
+
+void SAL_CALL AccessibleSlideSorterView::selectAllAccessibleChildren()
+{
+    ThrowIfDisposed();
+    const SolarMutexGuard aSolarGuard;
+
+    mrSlideSorter.GetController().GetPageSelector().SelectAllPages();
+}
+
+sal_Int64 SAL_CALL AccessibleSlideSorterView::getSelectedAccessibleChildCount()
+{
+    ThrowIfDisposed ();
+    const SolarMutexGuard aSolarGuard;
+    return mrSlideSorter.GetController().GetPageSelector().GetSelectedPageCount();
+}
+
+Reference<XAccessible > SAL_CALL
+    AccessibleSlideSorterView::getSelectedAccessibleChild (sal_Int64 nSelectedChildIndex )
+{
+    ThrowIfDisposed ();
+    const SolarMutexGuard aSolarGuard;
+
+    if (nSelectedChildIndex < 0 || nSelectedChildIndex >= getSelectedAccessibleChildCount())
+        throw lang::IndexOutOfBoundsException();
+
+    Reference<XAccessible> xChild;
+
+    ::sd::slidesorter::controller::PageSelector& rSelector (
+        mrSlideSorter.GetController().GetPageSelector());
+    sal_Int32 nPageCount(rSelector.GetPageCount());
+    sal_Int32 nSelectedCount = 0;
+    for (sal_Int32 i=0; i<nPageCount; i++)
+        if (rSelector.IsPageSelected(i))
+        {
+            if (nSelectedCount == nSelectedChildIndex)
+            {
+                xChild = mpImpl->GetAccessibleChild(i);
+                break;
+            }
+            ++nSelectedCount;
+        }
+
+    if ( ! xChild.is() )
+        throw lang::IndexOutOfBoundsException();
+
+    return xChild;
+}
+
+void SAL_CALL AccessibleSlideSorterView::deselectAccessibleChild (sal_Int64 nChildIndex)
+{
+    ThrowIfDisposed();
+    const SolarMutexGuard aSolarGuard;
+
+    if (nChildIndex < 0 || nChildIndex >= getAccessibleChildCount())
+        throw lang::IndexOutOfBoundsException();
+
+    AccessibleSlideSorterObject* pChild = mpImpl->GetAccessibleChild(nChildIndex);
+    if (pChild == nullptr)
+        throw lang::IndexOutOfBoundsException();
+
+    mrSlideSorter.GetController().GetPageSelector().DeselectPage(pChild->GetPageNumber());
+}
+
+// XServiceInfo
+OUString SAL_CALL
+       AccessibleSlideSorterView::getImplementationName()
+{
+    return "AccessibleSlideSorterView";
+}
+
+sal_Bool SAL_CALL AccessibleSlideSorterView::supportsService (const OUString& sServiceName)
+{
+    return cppu::supportsService(this, sServiceName);
+}
+
+uno::Sequence< OUString> SAL_CALL
+       AccessibleSlideSorterView::getSupportedServiceNames()
+{
+    ThrowIfDisposed ();
+
+    return uno::Sequence<OUString> {
+            OUString("com.sun.star.accessibility.Accessible"),
+            OUString("com.sun.star.accessibility.AccessibleContext"),
+            OUString("com.sun.star.drawing.AccessibleSlideSorterView")
+    };
+}
+
+void AccessibleSlideSorterView::ThrowIfDisposed()
+{
+    if (rBHelper.bDisposed || rBHelper.bInDispose)
+    {
+        SAL_WARN("sd", "Calling disposed object. Throwing exception:");
+        throw lang::DisposedException ("object has been already disposed",
+            static_cast<uno::XWeak*>(this));
+    }
+}
+
+//===== AccessibleSlideSorterView::Implementation =============================
+
+AccessibleSlideSorterView::Implementation::Implementation (
+    AccessibleSlideSorterView& rAccessibleSlideSorter,
+    ::sd::slidesorter::SlideSorter& rSlideSorter,
+    vcl::Window* pWindow)
+    : mrAccessibleSlideSorter(rAccessibleSlideSorter),
+      mrSlideSorter(rSlideSorter),
+      mnFirstVisibleChild(0),
+      mnLastVisibleChild(-1),
+      mbListeningToDocument(false),
+      mpWindow(pWindow),
+      mnFocusedIndex(-1),
+      mbModelChangeLocked(false),
+      mnUpdateChildrenUserEventId(nullptr),
+      mnSelectionChangeUserEventId(nullptr)
+{
+    ConnectListeners();
+    UpdateChildren();
+}
+
+AccessibleSlideSorterView::Implementation::~Implementation()
+{
+    if (mnUpdateChildrenUserEventId != nullptr)
+        Application::RemoveUserEvent(mnUpdateChildrenUserEventId);
+    if (mnSelectionChangeUserEventId != nullptr)
+        Application::RemoveUserEvent(mnSelectionChangeUserEventId);
+    ReleaseListeners();
+    Clear();
+}
+
+void AccessibleSlideSorterView::Implementation::RequestUpdateChildren()
+{
+    if (mnUpdateChildrenUserEventId == nullptr)
+        mnUpdateChildrenUserEventId = Application::PostUserEvent(
+            LINK(this, AccessibleSlideSorterView::Implementation,
+                 UpdateChildrenCallback));
+}
+
+void AccessibleSlideSorterView::Implementation::UpdateChildren()
+{
+      //By default, all children should be accessible. So here workaround is to make all children visible.
+      // MT: This was in UpdateVisibility, which has some similarity, and hg merge automatically has put it here. Correct?!
+      // In the IA2 CWS, also setting mnFirst/LastVisibleChild was commented out!
+    mnLastVisibleChild = maPageObjects.size();
+
+    if (mbModelChangeLocked)
+    {
+        // Do nothing right now.  When the flag is reset, this method is
+        // called again.
+        return;
+    }
+
+    const Range aRange (mrSlideSorter.GetView().GetVisiblePageRange());
+    mnFirstVisibleChild = aRange.Min();
+    mnLastVisibleChild = aRange.Max();
+
+    // Release all children.
+    Clear();
+
+    // Create new children for the modified visible range.
+    maPageObjects.resize(mrSlideSorter.GetModel().GetPageCount());
+
+    // No Visible children
+    if (mnFirstVisibleChild == -1 && mnLastVisibleChild == -1)
+        return;
+
+    for (sal_Int32 nIndex(mnFirstVisibleChild); nIndex<=mnLastVisibleChild; ++nIndex)
+        GetAccessibleChild(nIndex);
+}
+
+void AccessibleSlideSorterView::Implementation::Clear()
+{
+    for (auto& rxPageObject : maPageObjects)
+        if (rxPageObject != nullptr)
+        {
+            mrAccessibleSlideSorter.FireAccessibleEvent(
+                AccessibleEventId::CHILD,
+                Any(Reference<XAccessible>(rxPageObject)),
+                Any());
+
+            Reference<XComponent> xComponent (Reference<XWeak>(rxPageObject), UNO_QUERY);
+            if (xComponent.is())
+                xComponent->dispose();
+            rxPageObject = nullptr;
+        }
+    maPageObjects.clear();
+}
+
+sal_Int32 AccessibleSlideSorterView::Implementation::GetVisibleChildCount() const
+{
+    if (mnFirstVisibleChild<=mnLastVisibleChild && mnFirstVisibleChild>=0)
+        return mnLastVisibleChild - mnFirstVisibleChild + 1;
+    else
+        return 0;
+}
+
+AccessibleSlideSorterObject* AccessibleSlideSorterView::Implementation::GetVisibleChild (
+    sal_Int32 nIndex)
+{
+    assert(nIndex>=0 && nIndex<GetVisibleChildCount());
+
+    return GetAccessibleChild(nIndex+mnFirstVisibleChild);
+}
+
+AccessibleSlideSorterObject* AccessibleSlideSorterView::Implementation::GetAccessibleChild (
+    sal_Int32 nIndex)
+{
+    AccessibleSlideSorterObject* pChild = nullptr;
+
+    if (nIndex>=0 && o3tl::make_unsigned(nIndex)<maPageObjects.size())
+    {
+        if (maPageObjects[nIndex] == nullptr)
+        {
+            ::sd::slidesorter::model::SharedPageDescriptor pDescriptor(
+                mrSlideSorter.GetModel().GetPageDescriptor(nIndex));
+            if (pDescriptor)
+            {
+                maPageObjects[nIndex] = new AccessibleSlideSorterObject(
+                    &mrAccessibleSlideSorter,
+                    mrSlideSorter,
+                    (pDescriptor->GetPage()->GetPageNum()-1)/2);
+
+                mrAccessibleSlideSorter.FireAccessibleEvent(
+                    AccessibleEventId::CHILD,
+                    Any(),
+                    Any(Reference<XAccessible>(maPageObjects[nIndex])));
+            }
+
+        }
+
+        pChild = maPageObjects[nIndex].get();
+    }
+    else
+    {
+        OSL_ASSERT(nIndex>=0 && o3tl::make_unsigned(nIndex)<maPageObjects.size());
+    }
+
+    return pChild;
+}
+
+void AccessibleSlideSorterView::Implementation::ConnectListeners()
+{
+    StartListening (*mrSlideSorter.GetModel().GetDocument());
+    if (mrSlideSorter.GetViewShell() != nullptr)
+        StartListening (*mrSlideSorter.GetViewShell());
+    mbListeningToDocument = true;
+
+    if (mpWindow != nullptr)
+        mpWindow->AddEventListener(
+            LINK(this,AccessibleSlideSorterView::Implementation,WindowEventListener));
+
+    mrSlideSorter.GetController().GetSelectionManager()->AddSelectionChangeListener(
+        LINK(this,AccessibleSlideSorterView::Implementation,SelectionChangeListener));
+    mrSlideSorter.GetController().GetFocusManager().AddFocusChangeListener(
+        LINK(this,AccessibleSlideSorterView::Implementation,FocusChangeListener));
+    mrSlideSorter.GetView().AddVisibilityChangeListener(
+        LINK(this,AccessibleSlideSorterView::Implementation,VisibilityChangeListener));
+}
+
+void AccessibleSlideSorterView::Implementation::ReleaseListeners()
+{
+    mrSlideSorter.GetController().GetFocusManager().RemoveFocusChangeListener(
+        LINK(this,AccessibleSlideSorterView::Implementation,FocusChangeListener));
+    mrSlideSorter.GetController().GetSelectionManager()->RemoveSelectionChangeListener(
+        LINK(this,AccessibleSlideSorterView::Implementation,SelectionChangeListener));
+    mrSlideSorter.GetView().RemoveVisibilityChangeListener(
+        LINK(this,AccessibleSlideSorterView::Implementation,VisibilityChangeListener));
+
+    if (mpWindow != nullptr)
+        mpWindow->RemoveEventListener(
+            LINK(this,AccessibleSlideSorterView::Implementation,WindowEventListener));
+
+    if (mbListeningToDocument)
+    {
+        if (mrSlideSorter.GetViewShell() != nullptr && !IsListening(*mrSlideSorter.GetViewShell()))
+        {   // ??? is it even possible that ConnectListeners is called with no
+            // view shell and this one with a view shell?
+            StartListening(*mrSlideSorter.GetViewShell());
+        }
+        EndListening (*mrSlideSorter.GetModel().GetDocument());
+        mbListeningToDocument = false;
+    }
+}
+
+void AccessibleSlideSorterView::Implementation::Notify (
+    SfxBroadcaster&,
+    const SfxHint& rHint)
+{
+    if (rHint.GetId() == SfxHintId::ThisIsAnSdrHint)
+    {
+        const SdrHint* pSdrHint = static_cast<const SdrHint*>(&rHint);
+        switch (pSdrHint->GetKind())
+        {
+            case SdrHintKind::PageOrderChange:
+                RequestUpdateChildren();
+                break;
+            default:
+                break;
+        }
+    }
+    else if (auto pViewShellHint = dynamic_cast<const sd::ViewShellHint*>(&rHint))
+    {
+        switch (pViewShellHint->GetHintId())
+        {
+            case sd::ViewShellHint::HINT_COMPLEX_MODEL_CHANGE_START:
+                mbModelChangeLocked = true;
+                break;
+
+            case sd::ViewShellHint::HINT_COMPLEX_MODEL_CHANGE_END:
+                mbModelChangeLocked = false;
+                RequestUpdateChildren();
+                break;
+            default:
+                break;
+        }
+    }
+}
+
+void AccessibleSlideSorterView::SwitchViewActivated()
+{
+    // Firstly, set focus to view
+    FireAccessibleEvent(AccessibleEventId::STATE_CHANGED,
+                    Any(),
+                    Any(AccessibleStateType::FOCUSED));
+
+    mpImpl->Activated();
+}
+
+void AccessibleSlideSorterView::Implementation::Activated()
+{
+    mrSlideSorter.GetController().GetFocusManager().ShowFocus();
+
+}
+
+IMPL_LINK(AccessibleSlideSorterView::Implementation, WindowEventListener, VclWindowEvent&, rEvent, void)
+{
+    switch (rEvent.GetId())
+    {
+        case VclEventId::WindowMove:
+        case VclEventId::WindowResize:
+            RequestUpdateChildren();
+            break;
+
+        case VclEventId::WindowGetFocus:
+        case VclEventId::WindowLoseFocus:
+            mrAccessibleSlideSorter.FireAccessibleEvent(
+                AccessibleEventId::SELECTION_CHANGED,
+                Any(),
+                Any());
+            break;
+        default:
+            break;
+    }
+}
+
+IMPL_LINK_NOARG(AccessibleSlideSorterView::Implementation, SelectionChangeListener, LinkParamNone*, void)
+{
+    if (mnSelectionChangeUserEventId == nullptr)
+        mnSelectionChangeUserEventId = Application::PostUserEvent(
+            LINK(this, AccessibleSlideSorterView::Implementation, BroadcastSelectionChange));
+}
+
+IMPL_LINK_NOARG(AccessibleSlideSorterView::Implementation, BroadcastSelectionChange, void*, void)
+{
+    mnSelectionChangeUserEventId = nullptr;
+    mrAccessibleSlideSorter.FireAccessibleEvent(
+        AccessibleEventId::SELECTION_CHANGED,
+        Any(),
+        Any());
+}
+
+IMPL_LINK_NOARG(AccessibleSlideSorterView::Implementation, FocusChangeListener, LinkParamNone*, void)
+{
+    sal_Int32 nNewFocusedIndex (
+        mrSlideSorter.GetController().GetFocusManager().GetFocusedPageIndex());
+
+    bool bHasFocus = mrSlideSorter.GetController().GetFocusManager().IsFocusShowing();
+    if (!bHasFocus)
+        nNewFocusedIndex = -1;
+
+    // add a checker whether the focus event is sent out. Only after sent, the mnFocusedIndex should be updated.
+    bool bSentFocus = false;
+    if (nNewFocusedIndex == mnFocusedIndex)
+        return;
+
+    if (mnFocusedIndex >= 0)
+    {
+        AccessibleSlideSorterObject* pObject = GetAccessibleChild(mnFocusedIndex);
+        if (pObject != nullptr)
+        {
+            pObject->FireAccessibleEvent(
+                AccessibleEventId::STATE_CHANGED,
+                Any(AccessibleStateType::FOCUSED),
+                Any());
+            bSentFocus = true;
+        }
+    }
+    if (nNewFocusedIndex >= 0)
+    {
+        AccessibleSlideSorterObject* pObject = GetAccessibleChild(nNewFocusedIndex);
+        if (pObject != nullptr)
+        {
+            pObject->FireAccessibleEvent(
+                AccessibleEventId::STATE_CHANGED,
+                Any(),
+                Any(AccessibleStateType::FOCUSED));
+            bSentFocus = true;
+        }
+    }
+    if (bSentFocus)
+        mnFocusedIndex = nNewFocusedIndex;
+}
+
+IMPL_LINK_NOARG(AccessibleSlideSorterView::Implementation, UpdateChildrenCallback, void*, void)
+{
+    mnUpdateChildrenUserEventId = nullptr;
+    UpdateChildren();
+}
+
+IMPL_LINK_NOARG(AccessibleSlideSorterView::Implementation, VisibilityChangeListener, LinkParamNone*, void)
+{
+    UpdateChildren();
+}
+
+} // end of namespace ::accessibility
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */