AccessibleShape.cxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 * 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
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#include <svx/AccessibleShape.hxx>
#include <svx/AccessibleShapeInfo.hxx>
#include <com/sun/star/accessibility/AccessibleRole.hpp>
#include <com/sun/star/accessibility/AccessibleStateType.hpp>
#include <com/sun/star/accessibility/AccessibleRelationType.hpp>
#include <com/sun/star/accessibility/AccessibleEventId.hpp>
#include <com/sun/star/beans/XPropertySet.hpp>
#include <com/sun/star/drawing/XShapes.hpp>
#include <com/sun/star/document/XShapeEventBroadcaster.hpp>
#include <com/sun/star/lang/IndexOutOfBoundsException.hpp>
#include <com/sun/star/drawing/FillStyle.hpp>
#include <com/sun/star/text/XText.hpp>
#include <sal/log.hxx>
#include <editeng/unoedsrc.hxx>
#include <svx/AccessibleTextHelper.hxx>
#include <svx/ChildrenManager.hxx>
#include <svx/IAccessibleParent.hxx>
#include <svx/IAccessibleViewForwarder.hxx>
#include <svx/unoshtxt.hxx>
#include <svx/svdobj.hxx>
#include <svx/unoapi.hxx>
#include <svx/svdpage.hxx>
#include <svx/ShapeTypeHandler.hxx>
#include <svx/SvxShapeTypes.hxx>

#include <vcl/svapp.hxx>
#include <unotools/accessiblestatesethelper.hxx>
#include <unotools/accessiblerelationsethelper.hxx>
#include <svx/svdview.hxx>
#include <tools/diagnose_ex.h>
#include <cppuhelper/queryinterface.hxx>
#include <comphelper/sequence.hxx>
#include "AccessibleEmptyEditSource.hxx"

#include <algorithm>
#include <memory>

using namespace ::com::sun::star;
using namespace ::com::sun::star::accessibility;
using ::com::sun::star::uno::Reference;
using ::com::sun::star::lang::IndexOutOfBoundsException;
using ::com::sun::star::uno::RuntimeException;

namespace accessibility {

namespace {

OUString GetOptionalProperty (
    const Reference<beans::XPropertySet>& rxSet,
    const OUString& rsPropertyName)
{
    OUString sValue;

    if (rxSet.is())
    {
        const Reference<beans::XPropertySetInfo> xInfo (rxSet->getPropertySetInfo());
        if ( ! xInfo.is() || xInfo->hasPropertyByName(rsPropertyName))
        {
            try
            {
                rxSet->getPropertyValue(rsPropertyName) >>= sValue;
            }
            catch (beans::UnknownPropertyException&)
            {
                // This exception should only be thrown when the property
                // does not exits (of course) and the XPropertySetInfo is
                // not available.
            }
        }
    }
    return sValue;
}

} // end of anonymous namespace

// internal
AccessibleShape::AccessibleShape (
    const AccessibleShapeInfo& rShapeInfo,
    const AccessibleShapeTreeInfo& rShapeTreeInfo)
    : AccessibleContextBase (rShapeInfo.mxParent,AccessibleRole::SHAPE),
      mxShape (rShapeInfo.mxShape),
      maShapeTreeInfo (rShapeTreeInfo),
      m_nIndexInParent(-1),
      mpParent (rShapeInfo.mpChildrenManager)
{
    m_pShape = GetSdrObjectFromXShape(mxShape);
    UpdateNameAndDescription();
}

AccessibleShape::~AccessibleShape()
{
    mpChildrenManager.reset();
    mpText.reset();
    SAL_INFO("svx", "~AccessibleShape");

    // Unregistering from the various broadcasters should be unnecessary
    // since this destructor would not have been called if one of the
    // broadcasters would still hold a strong reference to this object.
}

void AccessibleShape::Init()
{
    // Update the OPAQUE and SELECTED shape.
    UpdateStates ();

    // Create a children manager when this shape has children of its own.
    Reference<drawing::XShapes> xShapes (mxShape, uno::UNO_QUERY);
    if (xShapes.is() && xShapes->getCount() > 0)
        mpChildrenManager.reset( new ChildrenManager (
            this, xShapes, maShapeTreeInfo, *this) );
    if (mpChildrenManager != nullptr)
        mpChildrenManager->Update();

    // Register at model as document::XEventListener.
    if (mxShape.is() && maShapeTreeInfo.GetModelBroadcaster().is())
        maShapeTreeInfo.GetModelBroadcaster()->addShapeEventListener(mxShape,
            static_cast<document::XShapeEventListener*>(this));

    // Beware! Here we leave the paths of the UNO API and descend into the
    // depths of the core.  Necessary for making the edit engine
    // accessible.
    Reference<text::XText> xText (mxShape, uno::UNO_QUERY);
    if (!xText.is())
        return;

    SdrView* pView = maShapeTreeInfo.GetSdrView ();
    const vcl::Window* pWindow = maShapeTreeInfo.GetWindow ();
    if (!(pView != nullptr && pWindow != nullptr && mxShape.is()))
        return;

    // #107948# Determine whether shape text is empty
    SdrObject* pSdrObject = GetSdrObjectFromXShape(mxShape);
    if( !pSdrObject )
        return;

    SdrTextObj* pTextObj = dynamic_cast<SdrTextObj*>( pSdrObject  );
    const bool hasOutlinerParaObject = (pTextObj && pTextObj->CanCreateEditOutlinerParaObject()) || (pSdrObject->GetOutlinerParaObject() != nullptr);

    // create AccessibleTextHelper to handle this shape's text
    if( !hasOutlinerParaObject )
    {
        // empty text -> use proxy edit source to delay creation of EditEngine
        mpText.reset( new AccessibleTextHelper( std::make_unique<AccessibleEmptyEditSource >(*pSdrObject, *pView, *pWindow) ) );
    }
    else
    {
        // non-empty text -> use full-fledged edit source right away
        mpText.reset( new AccessibleTextHelper( std::make_unique<SvxTextEditSource >(*pSdrObject, nullptr, *pView, *pWindow) ) );
    }
    if( pWindow->HasFocus() )
        mpText->SetFocus();

    mpText->SetEventSource(this);
}


void AccessibleShape::UpdateStates()
{
    ::utl::AccessibleStateSetHelper* pStateSet =
        static_cast< ::utl::AccessibleStateSetHelper*>(mxStateSet.get());
    if (pStateSet == nullptr)
        return;

    // Set the opaque state for certain shape types when their fill style is
    // solid.
    bool bShapeIsOpaque = false;
    switch (ShapeTypeHandler::Instance().GetTypeId (mxShape))
    {
        case DRAWING_PAGE:
        case DRAWING_RECTANGLE:
        case DRAWING_TEXT:
        {
            uno::Reference<beans::XPropertySet> xSet (mxShape, uno::UNO_QUERY);
            if (xSet.is())
            {
                try
                {
                    drawing::FillStyle aFillStyle;
                    bShapeIsOpaque =  ( xSet->getPropertyValue ("FillStyle") >>= aFillStyle)
                                        && aFillStyle == drawing::FillStyle_SOLID;
                }
                catch (css::beans::UnknownPropertyException&)
                {
                    // Ignore.
                }
            }
        }
    }
    if (bShapeIsOpaque)
        pStateSet->AddState (AccessibleStateType::OPAQUE);
    else
        pStateSet->RemoveState (AccessibleStateType::OPAQUE);

    // Set the selected state.
    bool bShapeIsSelected = false;
    // XXX fix_me this has to be done with an extra interface later on
    if ( m_pShape && maShapeTreeInfo.GetSdrView() )
    {
        bShapeIsSelected = maShapeTreeInfo.GetSdrView()->IsObjMarked(m_pShape);
    }

    if (bShapeIsSelected)
        pStateSet->AddState (AccessibleStateType::SELECTED);
    else
        pStateSet->RemoveState (AccessibleStateType::SELECTED);
}

OUString AccessibleShape::GetStyle()
{
    return ShapeTypeHandler::CreateAccessibleBaseName( mxShape );
}

bool AccessibleShape::SetState (sal_Int16 aState)
{
    bool bStateHasChanged = false;

    if (aState == AccessibleStateType::FOCUSED && mpText != nullptr)
    {
        // Offer FOCUSED state to edit engine and detect whether the state
        // changes.
        bool bIsFocused = mpText->HaveFocus ();
        mpText->SetFocus();
        bStateHasChanged = (bIsFocused != mpText->HaveFocus ());
    }
    else
        bStateHasChanged = AccessibleContextBase::SetState (aState);

    return bStateHasChanged;
}


bool AccessibleShape::ResetState (sal_Int16 aState)
{
    bool bStateHasChanged = false;

    if (aState == AccessibleStateType::FOCUSED && mpText != nullptr)
    {
        // Try to remove FOCUSED state from the edit engine and detect
        // whether the state changes.
        bool bIsFocused = mpText->HaveFocus ();
        mpText->SetFocus (false);
        bStateHasChanged = (bIsFocused != mpText->HaveFocus ());
    }
    else
        bStateHasChanged = AccessibleContextBase::ResetState (aState);

    return bStateHasChanged;
}


bool AccessibleShape::GetState (sal_Int16 aState)
{
    if (aState == AccessibleStateType::FOCUSED && mpText != nullptr)
    {
        // Just delegate the call to the edit engine.  The state is not
        // merged into the state set.
        return mpText->HaveFocus();
    }
    else
        return AccessibleContextBase::GetState (aState);
}

// OverWrite the parent's getAccessibleName method
OUString SAL_CALL AccessibleShape::getAccessibleName()
{
    ThrowIfDisposed ();
    if (m_pShape && !m_pShape->GetTitle().isEmpty())
        return CreateAccessibleName() + " " + m_pShape->GetTitle();
    else
        return CreateAccessibleName();
}

OUString SAL_CALL AccessibleShape::getAccessibleDescription()
{
    ThrowIfDisposed ();
    if( m_pShape && !m_pShape->GetDescription().isEmpty())
        return m_pShape->GetDescription() ;
    else
        return " ";
}

// XAccessibleContext
sal_Int32 SAL_CALL
       AccessibleShape::getAccessibleChildCount ()
{
    if (IsDisposed())
    {
        return 0;
    }

    sal_Int32 nChildCount = 0;

    // Add the number of shapes that are children of this shape.
    if (mpChildrenManager != nullptr)
        nChildCount += mpChildrenManager->GetChildCount ();
    // Add the number text paragraphs.
    if (mpText != nullptr)
        nChildCount += mpText->GetChildCount ();

    return nChildCount;
}


uno::Reference<XAccessible> SAL_CALL
    AccessibleShape::getAccessibleChild (sal_Int32 nIndex)
{
    ThrowIfDisposed ();

    uno::Reference<XAccessible> xChild;

    // Depending on the index decide whether to delegate this call to the
    // children manager or the edit engine.
    if ((mpChildrenManager != nullptr)
        && (nIndex < mpChildrenManager->GetChildCount()))
    {
        xChild = mpChildrenManager->GetChild (nIndex);
    }
    else if (mpText != nullptr)
    {
        sal_Int32 nI = nIndex;
        if (mpChildrenManager != nullptr)
            nI -= mpChildrenManager->GetChildCount();
        xChild = mpText->GetChild (nI);
    }
    else
        throw lang::IndexOutOfBoundsException (
            "shape has no child with index " + OUString::number(nIndex),
            static_cast<uno::XWeak*>(this));

    return xChild;
}

uno::Reference<XAccessibleRelationSet> SAL_CALL
    AccessibleShape::getAccessibleRelationSet()
{
    ::osl::MutexGuard aGuard (maMutex);
    if (mpParent == nullptr)
        return uno::Reference<XAccessibleRelationSet>();

    ::utl::AccessibleRelationSetHelper* pRelationSet = new utl::AccessibleRelationSetHelper;

    //this mxshape is the captioned shape
    uno::Sequence< uno::Reference< uno::XInterface > > aSequence { mpParent->GetAccessibleCaption(mxShape) };
    if(aSequence[0])
    {
        pRelationSet->AddRelation(
                                  AccessibleRelation( AccessibleRelationType::DESCRIBED_BY, aSequence ) );
    }
    return uno::Reference<XAccessibleRelationSet>(pRelationSet);
}

uno::Reference<XAccessibleStateSet> SAL_CALL
    AccessibleShape::getAccessibleStateSet()
{
    ::osl::MutexGuard aGuard (maMutex);

    if (IsDisposed())
    {
        // Return a minimal state set that only contains the DEFUNC state.
        return AccessibleContextBase::getAccessibleStateSet ();
    }

    ::utl::AccessibleStateSetHelper* pStateSet =
          static_cast<::utl::AccessibleStateSetHelper*>(mxStateSet.get());

    if (!pStateSet)
        return Reference<XAccessibleStateSet>();

    // Merge current FOCUSED state from edit engine.
    if (mpText)
    {
        if (mpText->HaveFocus())
            pStateSet->AddState (AccessibleStateType::FOCUSED);
        else
            pStateSet->RemoveState (AccessibleStateType::FOCUSED);
    }
    //Just when the document is not read-only,set states EDITABLE,RESIZABLE,MOVEABLE
    css::uno::Reference<XAccessible> xTempAcc = getAccessibleParent();
    if( xTempAcc.is() )
    {
        css::uno::Reference<XAccessibleContext>
                                xTempAccContext = xTempAcc->getAccessibleContext();
        if( xTempAccContext.is() )
        {
            css::uno::Reference<XAccessibleStateSet> rState =
                xTempAccContext->getAccessibleStateSet();
            if (rState.is())
            {
                css::uno::Sequence<short> aStates = rState->getStates();
                if (std::find(aStates.begin(), aStates.end(), AccessibleStateType::EDITABLE) != aStates.end())
                {
                    pStateSet->AddState (AccessibleStateType::EDITABLE);
                    pStateSet->AddState (AccessibleStateType::RESIZABLE);
                    pStateSet->AddState (AccessibleStateType::MOVEABLE);
                }
            }
        }
    }

    // Create a copy of the state set that may be modified by the
    // caller without affecting the current state set.
    Reference<XAccessibleStateSet> xStateSet(new ::utl::AccessibleStateSetHelper(*pStateSet));

    if (mpParent && mpParent->IsDocumentSelAll())
    {
        ::utl::AccessibleStateSetHelper* pCopyStateSet =
            static_cast<::utl::AccessibleStateSetHelper*>(xStateSet.get());
        pCopyStateSet->AddState (AccessibleStateType::SELECTED);
    }

    return xStateSet;
}

// XAccessibleComponent
uno::Reference<XAccessible > SAL_CALL
    AccessibleShape::getAccessibleAtPoint (
        const awt::Point& aPoint)
{
    ::osl::MutexGuard aGuard (maMutex);

    sal_Int32 nChildCount = getAccessibleChildCount ();
    for (sal_Int32 i=0; i<nChildCount; ++i)
    {
        Reference<XAccessible> xChild (getAccessibleChild (i));
        if (xChild.is())
        {
            Reference<XAccessibleComponent> xChildComponent (
                xChild->getAccessibleContext(), uno::UNO_QUERY);
            if (xChildComponent.is())
            {
                awt::Rectangle aBBox (xChildComponent->getBounds());
                if ( (aPoint.X >= aBBox.X)
                    && (aPoint.Y >= aBBox.Y)
                    && (aPoint.X < aBBox.X+aBBox.Width)
                    && (aPoint.Y < aBBox.Y+aBBox.Height) )
                    return xChild;
            }
        }
    }

    // Have not found a child under the given point.  Returning empty
    // reference to indicate this.
    return uno::Reference<XAccessible>();
}


awt::Rectangle SAL_CALL AccessibleShape::getBounds()
{
    SolarMutexGuard aSolarGuard;
    ::osl::MutexGuard aGuard (maMutex);

    ThrowIfDisposed ();
    awt::Rectangle aBoundingBox;
    if ( mxShape.is() )
    {

        static const char sBoundRectName[] = "BoundRect";
        static const char sAnchorPositionName[] = "AnchorPosition";

        // Get the shape's bounding box in internal coordinates (in 100th of
        // mm).  Use the property BoundRect.  Only if that is not supported ask
        // the shape for its position and size directly.
        Reference<beans::XPropertySet> xSet (mxShape, uno::UNO_QUERY);
        Reference<beans::XPropertySetInfo> xSetInfo;
        bool bFoundBoundRect = false;
        if (xSet.is())
        {
            xSetInfo = xSet->getPropertySetInfo ();
            if (xSetInfo.is())
            {
                if (xSetInfo->hasPropertyByName (sBoundRectName))
                {
                    try
                    {
                        uno::Any aValue = xSet->getPropertyValue (sBoundRectName);
                        aValue >>= aBoundingBox;
                        bFoundBoundRect = true;
                    }
                    catch (beans::UnknownPropertyException const&)
                    {
                        // Handled below (bFoundBoundRect stays false).
                    }
                }
                else
                    SAL_WARN("svx", "no property BoundRect");
            }
        }

        // Fallback when there is no BoundRect Property.
        if ( ! bFoundBoundRect )
        {
            awt::Point aPosition (mxShape->getPosition());
            awt::Size aSize (mxShape->getSize());
            aBoundingBox = awt::Rectangle (
                aPosition.X, aPosition.Y,
                aSize.Width, aSize.Height);

            // While BoundRects have absolute positions, the position returned
            // by XPosition::getPosition is relative.  Get the anchor position
            // (usually not (0,0) for Writer shapes).
            if (xSetInfo.is())
            {
                if (xSetInfo->hasPropertyByName (sAnchorPositionName))
                {
                    uno::Any aPos = xSet->getPropertyValue (sAnchorPositionName);
                    awt::Point aAnchorPosition;
                    aPos >>= aAnchorPosition;
                    aBoundingBox.X += aAnchorPosition.X;
                    aBoundingBox.Y += aAnchorPosition.Y;
                }
            }
        }

        // Transform coordinates from internal to pixel.
        if (maShapeTreeInfo.GetViewForwarder() == nullptr)
            throw uno::RuntimeException (
                "AccessibleShape has no valid view forwarder",
                static_cast<uno::XWeak*>(this));
        ::Size aPixelSize = maShapeTreeInfo.GetViewForwarder()->LogicToPixel (
            ::Size (aBoundingBox.Width, aBoundingBox.Height));
        ::Point aPixelPosition = maShapeTreeInfo.GetViewForwarder()->LogicToPixel (
            ::Point (aBoundingBox.X, aBoundingBox.Y));

        // Clip the shape's bounding box with the bounding box of its parent.
        Reference<XAccessibleComponent> xParentComponent (
            getAccessibleParent(), uno::UNO_QUERY);
        if (xParentComponent.is())
        {
            // Make the coordinates relative to the parent.
            awt::Point aParentLocation (xParentComponent->getLocationOnScreen());
            int x = aPixelPosition.getX() - aParentLocation.X;
            int y = aPixelPosition.getY() - aParentLocation.Y;

            // Clip with parent (with coordinates relative to itself).
            ::tools::Rectangle aBBox (
                x, y, x + aPixelSize.getWidth(), y + aPixelSize.getHeight());
            awt::Size aParentSize (xParentComponent->getSize());
            ::tools::Rectangle aParentBBox (0,0, aParentSize.Width, aParentSize.Height);
            aBBox = aBBox.GetIntersection (aParentBBox);
            aBoundingBox = awt::Rectangle (
                aBBox.getX(),
                aBBox.getY(),
                aBBox.getWidth(),
                aBBox.getHeight());
        }
        else
        {
            SAL_INFO("svx", "parent does not support component");
            aBoundingBox = awt::Rectangle (
                aPixelPosition.getX(), aPixelPosition.getY(),
                aPixelSize.getWidth(), aPixelSize.getHeight());
        }
    }

    return aBoundingBox;
}


awt::Point SAL_CALL AccessibleShape::getLocation()
{
    ThrowIfDisposed ();
    awt::Rectangle aBoundingBox (getBounds());
    return awt::Point (aBoundingBox.X, aBoundingBox.Y);
}


awt::Point SAL_CALL AccessibleShape::getLocationOnScreen()
{
    ThrowIfDisposed ();

    // Get relative position...
    awt::Point aLocation (getLocation ());

    // ... and add absolute position of the parent.
    uno::Reference<XAccessibleComponent> xParentComponent (
        getAccessibleParent(), uno::UNO_QUERY);
    if (xParentComponent.is())
    {
        awt::Point aParentLocation (xParentComponent->getLocationOnScreen());
        aLocation.X += aParentLocation.X;
        aLocation.Y += aParentLocation.Y;
    }
    else
        SAL_WARN("svx", "parent does not support XAccessibleComponent");
    return aLocation;
}


awt::Size SAL_CALL AccessibleShape::getSize()
{
    ThrowIfDisposed ();
    awt::Rectangle aBoundingBox (getBounds());
    return awt::Size (aBoundingBox.Width, aBoundingBox.Height);
}


sal_Int32 SAL_CALL AccessibleShape::getForeground()
{
    ThrowIfDisposed ();
    sal_Int32 nColor (0x0ffffffL);

    try
    {
        uno::Reference<beans::XPropertySet> aSet (mxShape, uno::UNO_QUERY);
        if (aSet.is())
        {
            uno::Any aColor;
            aColor = aSet->getPropertyValue ("LineColor");
            aColor >>= nColor;
        }
    }
    catch (const css::beans::UnknownPropertyException &)
    {
        // Ignore exception and return default color.
    }
    return nColor;
}


sal_Int32 SAL_CALL AccessibleShape::getBackground()
{
    ThrowIfDisposed ();
    Color nColor;

    try
    {
        uno::Reference<beans::XPropertySet> aSet (mxShape, uno::UNO_QUERY);
        if (aSet.is())
        {
            uno::Any aColor;
            aColor = aSet->getPropertyValue ("FillColor");
            aColor >>= nColor;
            aColor = aSet->getPropertyValue ("FillTransparence");
            short nTrans=0;
            aColor >>= nTrans;
            Color crBk(nColor);
            if (nTrans == 0 )
            {
                crBk.SetTransparency(0xff);
            }
            else
            {
                nTrans = short(256 - nTrans / 100. * 256);
                crBk.SetTransparency(sal_uInt8(nTrans));
            }
            nColor = crBk;
        }
    }
    catch (const css::beans::UnknownPropertyException &)
    {
        // Ignore exception and return default color.
    }
    return sal_Int32(nColor);
}

// XAccessibleEventBroadcaster
void SAL_CALL AccessibleShape::addAccessibleEventListener (
    const Reference<XAccessibleEventListener >& rxListener)
{
    if (rBHelper.bDisposed || rBHelper.bInDispose)
    {
        uno::Reference<uno::XInterface> xThis (
            static_cast<lang::XComponent *>(this), uno::UNO_QUERY);
        rxListener->disposing (lang::EventObject (xThis));
    }
    else
    {
        AccessibleContextBase::addAccessibleEventListener (rxListener);
        if (mpText != nullptr)
            mpText->AddEventListener (rxListener);
    }
}


void SAL_CALL AccessibleShape::removeAccessibleEventListener (
    const Reference<XAccessibleEventListener >& rxListener)
{
    AccessibleContextBase::removeAccessibleEventListener (rxListener);
    if (mpText != nullptr)
        mpText->RemoveEventListener (rxListener);
}

// XInterface
css::uno::Any SAL_CALL
    AccessibleShape::queryInterface (const css::uno::Type & rType)
{
    css::uno::Any aReturn = AccessibleContextBase::queryInterface (rType);
    if ( ! aReturn.hasValue())
        aReturn = ::cppu::queryInterface (rType,
            static_cast<XAccessibleComponent*>(this),
            static_cast<XAccessibleExtendedComponent*>(this),
            static_cast< css::accessibility::XAccessibleSelection* >(this),
            static_cast< css::accessibility::XAccessibleExtendedAttributes* >(this),
            static_cast<document::XShapeEventListener*>(this),
            static_cast<lang::XUnoTunnel*>(this),
            static_cast<XAccessibleGroupPosition*>(this),
            static_cast<XAccessibleHypertext*>(this)
            );
    return aReturn;
}


void SAL_CALL
    AccessibleShape::acquire()
    throw ()
{
    AccessibleContextBase::acquire ();
}


void SAL_CALL
    AccessibleShape::release()
    throw ()
{
    AccessibleContextBase::release ();
}

// XAccessibleSelection
void SAL_CALL AccessibleShape::selectAccessibleChild( sal_Int32 )
{
}


sal_Bool SAL_CALL AccessibleShape::isAccessibleChildSelected( sal_Int32 nChildIndex )
{
    uno::Reference<XAccessible> xAcc = getAccessibleChild( nChildIndex );
    uno::Reference<XAccessibleContext> xContext;
    if( xAcc.is() )
    {
        xContext = xAcc->getAccessibleContext();
    }

    if( xContext.is() )
    {
        if( xContext->getAccessibleRole() == AccessibleRole::PARAGRAPH )
        {
            uno::Reference< css::accessibility::XAccessibleText >
                xText(xAcc, uno::UNO_QUERY);
            if( xText.is() )
            {
                if( xText->getSelectionStart() >= 0 ) return true;
            }
        }
        else if( xContext->getAccessibleRole() == AccessibleRole::SHAPE )
        {
            Reference< XAccessibleStateSet > pRState = xContext->getAccessibleStateSet();
            if( !pRState.is() )
                return false;

            uno::Sequence<short> aStates = pRState->getStates();
            return std::find(aStates.begin(), aStates.end(), AccessibleStateType::SELECTED) != aStates.end();
        }
    }

    return false;
}


void SAL_CALL AccessibleShape::clearAccessibleSelection(  )
{
}


void SAL_CALL AccessibleShape::selectAllAccessibleChildren(  )
{
}


sal_Int32 SAL_CALL AccessibleShape::getSelectedAccessibleChildCount()
{
    sal_Int32 nCount = 0;
    sal_Int32 TotalCount = getAccessibleChildCount();
    for( sal_Int32 i = 0; i < TotalCount; i++ )
        if( isAccessibleChildSelected(i) ) nCount++;

    return nCount;
}


Reference<XAccessible> SAL_CALL AccessibleShape::getSelectedAccessibleChild( sal_Int32 nSelectedChildIndex )
{
    if ( nSelectedChildIndex > getSelectedAccessibleChildCount() )
        throw IndexOutOfBoundsException();
    sal_Int32 i1, i2;
    for( i1 = 0, i2 = 0; i1 < getAccessibleChildCount(); i1++ )
        if( isAccessibleChildSelected(i1) )
        {
            if( i2 == nSelectedChildIndex )
                return getAccessibleChild( i1 );
            i2++;
        }
    return Reference<XAccessible>();
}


void SAL_CALL AccessibleShape::deselectAccessibleChild( sal_Int32 )
{

}

// XAccessibleExtendedAttributes
uno::Any SAL_CALL AccessibleShape::getExtendedAttributes()
{
    uno::Any strRet;
    OUString style;
    if( getAccessibleRole() != AccessibleRole::SHAPE ) return strRet;
    if( m_pShape )
    {
        style = "style:" + GetStyle();
    }
    style += ";";
    strRet <<= style;
    return strRet;
}

// XServiceInfo
OUString SAL_CALL
    AccessibleShape::getImplementationName()
{
    return "AccessibleShape";
}


uno::Sequence<OUString> SAL_CALL
    AccessibleShape::getSupportedServiceNames()
{
    ThrowIfDisposed ();
    const css::uno::Sequence<OUString> vals { "com.sun.star.drawing.AccessibleShape" };
    return comphelper::concatSequences(AccessibleContextBase::getSupportedServiceNames(), vals);
}

// XTypeProvider
uno::Sequence<uno::Type> SAL_CALL
    AccessibleShape::getTypes()
{
    ThrowIfDisposed ();
    // Get list of types from the context base implementation, ...
    uno::Sequence<uno::Type> aTypeList (AccessibleContextBase::getTypes());
    // ... get list of types from component base implementation, ...
    uno::Sequence<uno::Type> aComponentTypeList (AccessibleComponentBase::getTypes());
    // ... define local types
    uno::Sequence<uno::Type> localTypesList = {
        cppu::UnoType<lang::XEventListener>::get(),
        cppu::UnoType<document::XEventListener>::get(),
        cppu::UnoType<lang::XUnoTunnel>::get()
    };

    return comphelper::concatSequences(aTypeList, aComponentTypeList, localTypesList);
}

// lang::XEventListener
void AccessibleShape::disposing (const lang::EventObject& aEvent)
{
    SolarMutexGuard aSolarGuard;
    ::osl::MutexGuard aGuard (maMutex);

    try
    {
        if (aEvent.Source ==  maShapeTreeInfo.GetModelBroadcaster())
        {
            // Remove reference to model broadcaster to allow it to pass
            // away.
            maShapeTreeInfo.SetModelBroadcaster(nullptr);
        }

    }
    catch (uno::RuntimeException const&)
    {
        TOOLS_WARN_EXCEPTION("svx", "caught exception while disposing");
    }
}

// document::XShapeEventListener
void SAL_CALL
    AccessibleShape::notifyShapeEvent (const document::EventObject& rEventObject)
{
    if (rEventObject.EventName != "ShapeModified")
        return;

    //Need to update text children when receiving ShapeModified hint when exiting edit mode for text box
    if (mpText)
        mpText->UpdateChildren();


    // Some property of a shape has been modified.  Send an event
    // that indicates a change of the visible data to all listeners.
    CommitChange (
        AccessibleEventId::VISIBLE_DATA_CHANGED,
        uno::Any(),
        uno::Any());

    // Name and Description may have changed.  Update the local
    // values accordingly.
    UpdateNameAndDescription();
}

// lang::XUnoTunnel
UNO3_GETIMPLEMENTATION_IMPL(AccessibleShape)

// IAccessibleViewForwarderListener
void AccessibleShape::ViewForwarderChanged()
{
    // Inform all listeners that the graphical representation (i.e. size
    // and/or position) of the shape has changed.
    CommitChange (AccessibleEventId::VISIBLE_DATA_CHANGED,
        uno::Any(),
        uno::Any());

    // Tell children manager of the modified view forwarder.
    if (mpChildrenManager != nullptr)
        mpChildrenManager->ViewForwarderChanged();

    // update our children that our screen position might have changed
    if( mpText )
        mpText->UpdateChildren();
}

// protected internal
// Set this object's name if is different to the current name.
OUString AccessibleShape::CreateAccessibleBaseName()
{
    return ShapeTypeHandler::CreateAccessibleBaseName( mxShape );
}


OUString AccessibleShape::CreateAccessibleName()
{
    return GetFullAccessibleName(this);
}

OUString AccessibleShape::GetFullAccessibleName (AccessibleShape *shape)
{
    OUString sName (shape->CreateAccessibleBaseName());
    // Append the shape's index to the name to disambiguate between shapes
    // of the same type.  If such an index where not given to the
    // constructor then use the z-order instead.  If even that does not exist
    // we throw an exception.
    OUString nameStr;
    if (shape->m_pShape)
        nameStr = shape->m_pShape->GetName();
    if (nameStr.isEmpty())
    {
        sName += " ";
    }
    else
    {
        sName = nameStr;
    }

    //If the new produced name if not the same with last,notify name changed
    //Event
    if (aAccName != sName && !aAccName.isEmpty())
    {
        uno::Any aOldValue, aNewValue;
        aOldValue <<= aAccName;
        aNewValue <<= sName;
        CommitChange(
            AccessibleEventId::NAME_CHANGED,
            aNewValue,
            aOldValue);
    }
    aAccName = sName;
    return sName;
}

// protected
void AccessibleShape::disposing()
{
    SolarMutexGuard aSolarGuard;
    ::osl::MutexGuard aGuard (maMutex);

    // Make sure to send an event that this object loses the focus in the
    // case that it has the focus.
    ::utl::AccessibleStateSetHelper* pStateSet =
          static_cast< ::utl::AccessibleStateSetHelper*>(mxStateSet.get());
    if (pStateSet != nullptr)
        pStateSet->RemoveState (AccessibleStateType::FOCUSED);

    // Unregister from model.
    if (mxShape.is() && maShapeTreeInfo.GetModelBroadcaster().is())
        maShapeTreeInfo.GetModelBroadcaster()->removeShapeEventListener(mxShape,
            static_cast<document::XShapeEventListener*>(this));

    // Release the child containers.
    if (mpChildrenManager != nullptr)
    {
        mpChildrenManager.reset();
    }
    if (mpText != nullptr)
    {
        mpText->Dispose();
        mpText.reset();
    }

    // Cleanup.  Remove references to objects to allow them to be
    // destroyed.
    mxShape = nullptr;
    maShapeTreeInfo.dispose();

    // Call base classes.
    AccessibleContextBase::dispose ();
}

sal_Int32 SAL_CALL
       AccessibleShape::getAccessibleIndexInParent()
{
    ThrowIfDisposed ();
    //  Use a simple but slow solution for now.  Optimize later.

    sal_Int32 nIndex = m_nIndexInParent;
    if ( -1 == nIndex )
        nIndex = AccessibleContextBase::getAccessibleIndexInParent();
    return nIndex;
}


void AccessibleShape::UpdateNameAndDescription()
{
    // Ignore missing title, name, or description.  There are fallbacks for
    // them.
    try
    {
        Reference<beans::XPropertySet> xSet (mxShape, uno::UNO_QUERY_THROW);

        // Get the accessible name.
        OUString sString = GetOptionalProperty(xSet, "Title");
        if (!sString.isEmpty())
        {
            SetAccessibleName(sString, AccessibleContextBase::FromShape);
        }
        else
        {
            sString = GetOptionalProperty(xSet, "Name");
            if (!sString.isEmpty())
                SetAccessibleName(sString, AccessibleContextBase::FromShape);
        }

        // Get the accessible description.
        sString = GetOptionalProperty(xSet, "Description");
        if (!sString.isEmpty())
            SetAccessibleDescription(sString, AccessibleContextBase::FromShape);
    }
    catch (uno::RuntimeException&)
    {
    }
}

//  Return this object's role.
sal_Int16 SAL_CALL AccessibleShape::getAccessibleRole()
{
    sal_Int16 nAccessibleRole =  AccessibleRole::SHAPE ;
    switch (ShapeTypeHandler::Instance().GetTypeId (mxShape))
    {
        case     DRAWING_GRAPHIC_OBJECT:
                 nAccessibleRole =  AccessibleRole::GRAPHIC ;               break;
        case     DRAWING_OLE:
                 nAccessibleRole =  AccessibleRole::EMBEDDED_OBJECT ;       break;

        default:
            nAccessibleRole = AccessibleContextBase::getAccessibleRole();
            break;
    }

    return nAccessibleRole;
}

namespace {

//sort the drawing objects from up to down, from left to right
struct XShapePosCompareHelper
{
    bool operator() ( const uno::Reference<drawing::XShape>& xshape1,
        const uno::Reference<drawing::XShape>& xshape2 ) const
    {
        SdrObject* pObj1 = GetSdrObjectFromXShape(xshape1);
        SdrObject* pObj2 = GetSdrObjectFromXShape(xshape2);
        if(pObj1 && pObj2)
            return pObj1->GetOrdNum() < pObj2->GetOrdNum();
        else
            return false;
    }
};

}
//end of group position

// XAccessibleGroupPosition
uno::Sequence< sal_Int32 > SAL_CALL
AccessibleShape::getGroupPosition( const uno::Any& )
{
    // we will return the:
    // [0] group level
    // [1] similar items counts in the group
    // [2] the position of the object in the group
    uno::Sequence< sal_Int32 > aRet( 3 );
    aRet[0] = 0;
    aRet[1] = 0;
    aRet[2] = 0;

    css::uno::Reference<XAccessible> xParent = getAccessibleParent();
    if (!xParent.is())
    {
        return aRet;
    }
    SdrObject *pObj = GetSdrObjectFromXShape(mxShape);


    if(pObj == nullptr )
    {
        return aRet;
    }

    // Compute object's group level.
    sal_Int32 nGroupLevel = 0;
    SdrObject * pUper = pObj->getParentSdrObjectFromSdrObject();
    while( pUper )
    {
        ++nGroupLevel;
        pUper = pUper->getParentSdrObjectFromSdrObject();
    }

    css::uno::Reference<XAccessibleContext> xParentContext = xParent->getAccessibleContext();
    if( xParentContext->getAccessibleRole()  == AccessibleRole::DOCUMENT ||
            xParentContext->getAccessibleRole()  == AccessibleRole::DOCUMENT_PRESENTATION ||
            xParentContext->getAccessibleRole()  == AccessibleRole::DOCUMENT_SPREADSHEET ||
            xParentContext->getAccessibleRole()  == AccessibleRole::DOCUMENT_TEXT )//Document
    {
        Reference< XAccessibleGroupPosition > xGroupPosition( xParent,uno::UNO_QUERY );
        if ( xGroupPosition.is() )
        {
            aRet = xGroupPosition->getGroupPosition( uno::makeAny( getAccessibleContext() ) );
        }
        return aRet;
    }
    if (xParentContext->getAccessibleRole() != AccessibleRole::SHAPE)
    {
        return aRet;
    }

    SdrObjList *pGrpList = nullptr;
    if( pObj->getParentSdrObjectFromSdrObject() )
        pGrpList = pObj->getParentSdrObjectFromSdrObject()->GetSubList();
    else
        return aRet;

    std::vector< uno::Reference<drawing::XShape> > vXShapes;
    if (pGrpList)
    {
        const size_t nObj = pGrpList->GetObjCount();
        for(size_t i = 0 ; i < nObj ; ++i)
        {
            SdrObject *pSubObj = pGrpList->GetObj(i);
            if (pSubObj &&
                xParentContext->getAccessibleChild(i)->getAccessibleContext()->getAccessibleRole() != AccessibleRole::GROUP_BOX)
            {
                vXShapes.push_back( GetXShapeForSdrObject(pSubObj) );
            }
        }
    }

    std::sort( vXShapes.begin(), vXShapes.end(), XShapePosCompareHelper() );

    //get the index of the selected object in the group
    //we start counting position from 1
    sal_Int32 nPos = 1;
    for ( const auto& rpShape : vXShapes )
    {
        if ( rpShape.get() == mxShape.get() )
        {
            sal_Int32* pArray = aRet.getArray();
            pArray[0] = nGroupLevel;
            pArray[1] = vXShapes.size();
            pArray[2] = nPos;
            break;
        }
        nPos++;
    }

    return aRet;
}

OUString AccessibleShape::getObjectLink( const uno::Any& )
{
    OUString aRet;

    SdrObject *pObj = GetSdrObjectFromXShape(mxShape);
    if(pObj == nullptr )
    {
        return aRet;
    }
    if (maShapeTreeInfo.GetDocumentWindow().is())
    {
        Reference< XAccessibleGroupPosition > xGroupPosition( maShapeTreeInfo.GetDocumentWindow(), uno::UNO_QUERY );
        if (xGroupPosition.is())
        {
            aRet = xGroupPosition->getObjectLink( uno::makeAny( getAccessibleContext() ) );
        }
    }
    return aRet;
}

// XAccessibleHypertext
sal_Int32 SAL_CALL AccessibleShape::getHyperLinkCount()
{
    // MT: Introduced with IA2 CWS, but SvxAccessibleHyperlink was redundant to svx::AccessibleHyperlink which we introduced meanwhile.
    // Code need to be adapted...
    return 0;

    /*
    SvxAccessibleHyperlink* pLink = new SvxAccessibleHyperlink(m_pShape,this);
    if (pLink->IsValidHyperlink())
        return 1;
    else
        return 0;
    */
}
uno::Reference< XAccessibleHyperlink > SAL_CALL
    AccessibleShape::getHyperLink( sal_Int32 )
{
    uno::Reference< XAccessibleHyperlink > xRet;
    // MT: Introduced with IA2 CWS, but SvxAccessibleHyperlink was redundant to svx::AccessibleHyperlink which we introduced meanwhile.
    // Code need to be adapted...
    /*
    SvxAccessibleHyperlink* pLink = new SvxAccessibleHyperlink(m_pShape,this);
    if (pLink->IsValidHyperlink())
        xRet = pLink;
    if( !xRet.is() )
        throw css::lang::IndexOutOfBoundsException();
    */
    return xRet;
}
sal_Int32 SAL_CALL AccessibleShape::getHyperLinkIndex( sal_Int32 )
{
    return 0;
}
// XAccessibleText
sal_Int32 SAL_CALL AccessibleShape::getCaretPosition(  ){return 0;}
sal_Bool SAL_CALL AccessibleShape::setCaretPosition( sal_Int32 ){return false;}
sal_Unicode SAL_CALL AccessibleShape::getCharacter( sal_Int32 ){return 0;}
css::uno::Sequence< css::beans::PropertyValue > SAL_CALL AccessibleShape::getCharacterAttributes( sal_Int32, const css::uno::Sequence< OUString >& )
{
    uno::Sequence< css::beans::PropertyValue > aValues(0);
    return aValues;
}
css::awt::Rectangle SAL_CALL AccessibleShape::getCharacterBounds( sal_Int32 )
{
    return css::awt::Rectangle(0, 0, 0, 0 );
}
sal_Int32 SAL_CALL AccessibleShape::getCharacterCount(  ){return 0;}
sal_Int32 SAL_CALL AccessibleShape::getIndexAtPoint( const css::awt::Point& ){return 0;}
OUString SAL_CALL AccessibleShape::getSelectedText(  ){return OUString();}
sal_Int32 SAL_CALL AccessibleShape::getSelectionStart(  ){return 0;}
sal_Int32 SAL_CALL AccessibleShape::getSelectionEnd(  ){return 0;}
sal_Bool SAL_CALL AccessibleShape::setSelection( sal_Int32, sal_Int32 ){return true;}
OUString SAL_CALL AccessibleShape::getText(  ){return OUString();}
OUString SAL_CALL AccessibleShape::getTextRange( sal_Int32, sal_Int32 ){return OUString();}
css::accessibility::TextSegment SAL_CALL AccessibleShape::getTextAtIndex( sal_Int32, sal_Int16 )
{
    css::accessibility::TextSegment aResult;
    return aResult;
}
css::accessibility::TextSegment SAL_CALL AccessibleShape::getTextBeforeIndex( sal_Int32, sal_Int16 )
{
    css::accessibility::TextSegment aResult;
    return aResult;
}
css::accessibility::TextSegment SAL_CALL AccessibleShape::getTextBehindIndex( sal_Int32, sal_Int16 )
{
    css::accessibility::TextSegment aResult;
    return aResult;
}
sal_Bool SAL_CALL AccessibleShape::copyText( sal_Int32, sal_Int32 ){return true;}
sal_Bool SAL_CALL AccessibleShape::scrollSubstringTo( sal_Int32, sal_Int32, AccessibleScrollType ){return false;}

} // end of namespace accessibility

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