AccessibleChartView.cxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 *   Licensed to the Apache Software Foundation (ASF) under one or more
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#include <AccessibleChartView.hxx>
#include <chartview/ExplicitValueProvider.hxx>
#include <ObjectHierarchy.hxx>
#include <ObjectIdentifier.hxx>
#include <ResId.hxx>
#include <strings.hrc>
#include "AccessibleViewForwarder.hxx"
#include <ChartModel.hxx>
#include <ChartView.hxx>
 
#include <com/sun/star/accessibility/AccessibleStateType.hpp>
#include <com/sun/star/accessibility/AccessibleRole.hpp>
#include <com/sun/star/view/XSelectionSupplier.hpp>
 
#include <comphelper/servicehelper.hxx>
 
#include <rtl/ustring.hxx>
#include <vcl/window.hxx>
#include <toolkit/helper/vclunohelper.hxx>
#include <vcl/svapp.hxx>
#include <osl/mutex.hxx>
 
using namespace ::com::sun::star;
using namespace ::com::sun::star::accessibility;
 
using ::com::sun::star::uno::Sequence;
using ::com::sun::star::uno::Reference;
using ::com::sun::star::uno::WeakReference;
using ::com::sun::star::uno::Any;
using osl::MutexGuard;
 
namespace chart
{
 
AccessibleChartView::AccessibleChartView(SdrView* pView ) :
        impl::AccessibleChartView_Base(
            AccessibleElementInfo(), // empty for now
            true, // has children
            true  // always transparent
            ),
        m_pSdrView( pView )
{
    AddState( AccessibleStateType::OPAQUE );
}
 
AccessibleChartView::~AccessibleChartView()
{
}
 
awt::Rectangle AccessibleChartView::GetWindowPosSize() const
{
    Reference< awt::XWindow > xWindow( GetInfo().m_xWindow );
    if( ! xWindow.is())
        return awt::Rectangle();
 
    awt::Rectangle aBBox( xWindow->getPosSize() );
 
    VclPtr<vcl::Window> pWindow( VCLUnoHelper::GetWindow( GetInfo().m_xWindow ));
    if( pWindow )
    {
        SolarMutexGuard aSolarGuard;
        Point aVCLPoint( pWindow->OutputToAbsoluteScreenPixel( Point( 0, 0 ) ));
        aBBox.X = aVCLPoint.getX();
        aBBox.Y = aVCLPoint.getY();
    }
 
    return aBBox;
}
 
awt::Point AccessibleChartView::GetUpperLeftOnScreen() const
{
    awt::Point aParentPosition;
 
    awt::Rectangle aBBox( GetWindowPosSize() );
    aParentPosition.X = aBBox.X;
    aParentPosition.Y = aBBox.Y;
 
    return aParentPosition;
}
 
// ________ XAccessibleContext ________
OUString SAL_CALL AccessibleChartView::getAccessibleName()
{
    return SchResId(STR_OBJECT_DIAGRAM);
}
 
OUString SAL_CALL AccessibleChartView::getAccessibleDescription()
{
    return getAccessibleName();
}
 
Reference< XAccessible > SAL_CALL AccessibleChartView::getAccessibleParent()
{
    return Reference< XAccessible >( m_xParent );
}
 
sal_Int64 SAL_CALL AccessibleChartView::getAccessibleIndexInParent()
{
    // the document is always the only child of the window
    return 0;
}
 
sal_Int16 SAL_CALL AccessibleChartView::getAccessibleRole()
{
    return AccessibleRole::DOCUMENT;
}
 
// ________ XAccessibleComponent ________
awt::Rectangle SAL_CALL AccessibleChartView::getBounds()
{
    awt::Rectangle aResult( GetWindowPosSize());
    Reference< XAccessible > xParent( m_xParent );
    if( xParent.is())
    {
        Reference< XAccessibleComponent > xContext( xParent->getAccessibleContext(), uno::UNO_QUERY );
        if( xContext.is())
        {
            awt::Point aParentPosition = xContext->getLocationOnScreen();
            aResult.X -= aParentPosition.X;
            aResult.Y -= aParentPosition.Y;
        }
    }
    return aResult;
}
 
awt::Point SAL_CALL AccessibleChartView::getLocationOnScreen()
{
    awt::Rectangle aBounds( getBounds());
    awt::Point aResult;
    Reference< XAccessible > xParent( m_xParent );
    if( xParent.is())
    {
        Reference< XAccessibleComponent > xAccComp(
            xParent->getAccessibleContext(), uno::UNO_QUERY );
        aResult = xAccComp->getLocationOnScreen();
        aResult.X += aBounds.X;
        aResult.Y += aBounds.Y;
    }
    return aResult;
}
 
// lang::XInitialization
 
void SAL_CALL AccessibleChartView::initialize( const Sequence< Any >& rArguments )
{
    //0: view::XSelectionSupplier offers notifications for selection changes and access to the selection itself
    //1: frame::XModel representing the chart model - offers access to object data
    //2: lang::XInterface representing the normal chart view - offers access to some extra object data
 
    //all arguments are only valid until next initialization
    bool bChanged = false;
    bool bOldInvalid = false;
    bool bNewInvalid = false;
 
    Reference< view::XSelectionSupplier > xSelectionSupplier;
    rtl::Reference<::chart::ChartModel> xChartModel;
    rtl::Reference<::chart::ChartView> xChartView;
    Reference< XAccessible > xParent;
    Reference< awt::XWindow > xWindow;
    {
        MutexGuard aGuard( m_aMutex);
        xSelectionSupplier.set( m_xSelectionSupplier );
        xChartModel = m_xChartModel;
        xChartView = m_xChartView;
        xParent.set( m_xParent );
        xWindow.set( m_xWindow );
    }
 
    if( !xSelectionSupplier.is() || !xChartModel.is() || !xChartView.is() )
    {
        bOldInvalid = true;
    }
 
    if( rArguments.getLength() > 1 )
    {
        Reference< frame::XModel > xNewChartModel;
        rArguments[1] >>= xNewChartModel;
        assert(!xNewChartModel || dynamic_cast<::chart::ChartModel*>(xNewChartModel.get()));
        ::chart::ChartModel* pNewChartModel = dynamic_cast<::chart::ChartModel*>(xNewChartModel.get());
        if( pNewChartModel != xChartModel.get() )
        {
            xChartModel = pNewChartModel;
            bChanged = true;
        }
    }
    else if( xChartModel.is() )
    {
        bChanged = true;
        xChartModel = nullptr;
    }
 
    if( rArguments.getLength() > 2 )
    {
        Reference< uno::XInterface > xTmp;
        rArguments[2] >>= xTmp;
        rtl::Reference<::chart::ChartView> xNewChartView = dynamic_cast<::chart::ChartView*>(xTmp.get());
        assert(bool(xTmp)==bool(xNewChartView) && "we only support ChartView");
        if( xNewChartView != xChartView )
        {
            xChartView = xNewChartView;
            bChanged = true;
        }
    }
    else if( xChartView.is() )
    {
        bChanged = true;
        xChartView = nullptr;
    }
 
    if( rArguments.getLength() > 3 )
    {
        Reference< XAccessible > xNewParent;
        rArguments[3] >>= xNewParent;
        if( xNewParent != xParent )
        {
            xParent = xNewParent;
            bChanged = true;
        }
    }
 
    if( rArguments.getLength() > 4 )
    {
        Reference< awt::XWindow > xNewWindow;
        rArguments[4] >>= xNewWindow;
        if( xNewWindow != xWindow )
        {
            xWindow.set( xNewWindow );
            bChanged = true;
        }
    }
 
    if( rArguments.hasElements() && xChartModel.is() && xChartView.is() )
    {
        Reference< view::XSelectionSupplier > xNewSelectionSupplier;
        rArguments[0] >>= xNewSelectionSupplier;
        if(xSelectionSupplier!=xNewSelectionSupplier)
        {
            bChanged = true;
            if(xSelectionSupplier.is())
                xSelectionSupplier->removeSelectionChangeListener(this);
            if(xNewSelectionSupplier.is())
                xNewSelectionSupplier->addSelectionChangeListener(this);
            xSelectionSupplier = xNewSelectionSupplier;
        }
    }
    else if( xSelectionSupplier.is() )
    {
        bChanged = true;
        xSelectionSupplier->removeSelectionChangeListener(this);
        xSelectionSupplier = nullptr;
    }
 
    if( !xSelectionSupplier.is() || !xChartModel.is() || !xChartView.is() )
    {
        if(xSelectionSupplier.is())
            xSelectionSupplier->removeSelectionChangeListener(this);
        xSelectionSupplier = nullptr;
        xChartModel.clear();
        xChartView.clear();
        xParent.clear();
        xWindow.clear();
 
        bNewInvalid = true;
    }
 
    {
        MutexGuard aGuard( m_aMutex);
        m_xSelectionSupplier = WeakReference< view::XSelectionSupplier >(xSelectionSupplier);
        m_xChartModel = xChartModel.get();
        m_xChartView = xChartView.get();
        m_xParent = WeakReference< XAccessible >(xParent);
        m_xWindow = WeakReference< awt::XWindow >(xWindow);
    }
 
    if( bOldInvalid && bNewInvalid )
        bChanged = false;
 
    if( !bChanged )
        return;
 
    {
        //before notification we prepare for creation of new context
        //the old context will be deleted after notification than
        MutexGuard aGuard( m_aMutex);
        if( xChartModel.is())
            m_spObjectHierarchy =
                std::make_shared<ObjectHierarchy>( xChartModel, m_xChartView.get().get() );
        else
            m_spObjectHierarchy.reset();
    }
 
    {
        AccessibleElementInfo aAccInfo;
        aAccInfo.m_aOID = ObjectIdentifier("ROOT");
        aAccInfo.m_xChartDocument = m_xChartModel;
        aAccInfo.m_xSelectionSupplier = m_xSelectionSupplier;
        aAccInfo.m_xView = m_xChartView;
        aAccInfo.m_xWindow = m_xWindow;
        aAccInfo.m_pParent = nullptr;
        aAccInfo.m_spObjectHierarchy = m_spObjectHierarchy;
        aAccInfo.m_pSdrView = m_pSdrView;
        VclPtr<vcl::Window> pWindow = VCLUnoHelper::GetWindow( m_xWindow );
        m_pViewForwarder.reset( new AccessibleViewForwarder( this, pWindow ) );
        aAccInfo.m_pViewForwarder = m_pViewForwarder.get();
        // broadcasts an INVALIDATE_ALL_CHILDREN event globally
        SetInfo( aAccInfo );
    }
}
 
// view::XSelectionChangeListener
 
void SAL_CALL AccessibleChartView::selectionChanged( const lang::EventObject& /*rEvent*/ )
{
    Reference< view::XSelectionSupplier > xSelectionSupplier;
    {
        MutexGuard aGuard( m_aMutex);
        xSelectionSupplier.set(m_xSelectionSupplier);
    }
 
    if( !xSelectionSupplier.is() )
        return;
 
    ObjectIdentifier aSelectedOID( xSelectionSupplier->getSelection() );
    if ( m_aCurrentSelectionOID.isValid() )
    {
        NotifyEvent( EventType::LOST_SELECTION, m_aCurrentSelectionOID );
    }
    if( aSelectedOID.isValid() )
    {
        NotifyEvent( EventType::GOT_SELECTION, aSelectedOID );
    }
    m_aCurrentSelectionOID = aSelectedOID;
}
 
// XEventListener
void SAL_CALL AccessibleChartView::disposing( const lang::EventObject& /*Source*/ )
{
}
 
} //namespace chart
 
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