/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

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 * 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

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 */

#include <AccessibleChartView.hxx>

#include <ObjectHierarchy.hxx>

#include <ObjectIdentifier.hxx>

#include <ResId.hxx>

#include <strings.hrc>

#include "AccessibleViewForwarder.hxx"

#include <ChartModel.hxx>

#include <ChartView.hxx>

#include <ChartController.hxx>

#include <com/sun/star/accessibility/AccessibleStateType.hpp>

#include <com/sun/star/accessibility/AccessibleRole.hpp>

#include <com/sun/star/view/XSelectionSupplier.hpp>

#include <rtl/ustring.hxx>

#include <vcl/window.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::Reference;

using ::com::sun::star::uno::WeakReference;

using osl::MutexGuard;

namespace chart

{

AccessibleChartView::AccessibleChartView(SdrView* pView)

    : ImplInheritanceHelper(AccessibleElementInfo(), // empty for now

                            true, // has children

                            true // always transparent

                            )

    , m_pSdrView(pView)

{

    AddState( AccessibleStateType::OPAQUE );

}

AccessibleChartView::~AccessibleChartView()

{

}

awt::Rectangle AccessibleChartView::GetWindowPosSize() const

{

    SolarMutexGuard aSolarGuard;

    VclPtr<vcl::Window> pWindow = GetInfo().m_pWindow;

    if (!pWindow)

        return awt::Rectangle();

    awt::Rectangle aBBox;

    Point aVCLPoint( pWindow->OutputToAbsoluteScreenPixel( Point( 0, 0 ) ));

    const Size aSize = pWindow->GetSizePixel();

    aBBox.X = aVCLPoint.getX();

    aBBox.Y = aVCLPoint.getY();

    aBBox.Width = aSize.Width();

    aBBox.Height = aSize.Height();

    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 m_pParent.get();

}

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;

}

awt::Rectangle AccessibleChartView::implGetBounds()

{

    awt::Rectangle aResult( GetWindowPosSize());

    rtl::Reference<comphelper::OAccessible> pParent(m_pParent);

    if (pParent.is())

    {

        awt::Point aParentPosition = pParent->getLocationOnScreen();

        aResult.X -= aParentPosition.X;

        aResult.Y -= aParentPosition.Y;

    }

    return aResult;

}

void SAL_CALL AccessibleChartView::disposing()

{

    m_pChartWindow.reset();

    AccessibleBase::disposing();

}

void AccessibleChartView::initialize(ChartController& rNewChartController,

                                     const rtl::Reference<::chart::ChartModel>& xNewChartModel,

                                     const rtl::Reference<::chart::ChartView>& xNewChartView,

                                     const rtl::Reference<comphelper::OAccessible>& rpNewParent,

                                     ChartWindow* pNewChartWindow)

{

    //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;

    rtl::Reference< ::chart::ChartController > xChartController;

    rtl::Reference<::chart::ChartModel> xChartModel;

    rtl::Reference<::chart::ChartView> xChartView;

    rtl::Reference<comphelper::OAccessible> pParent;

    VclPtr<ChartWindow> pChartWindow;

    {

        MutexGuard aGuard( m_aMutex);

        xChartController = m_xChartController;

        xChartModel = m_xChartModel;

        xChartView = m_xChartView;

        pParent = m_pParent.get();

        pChartWindow = m_pChartWindow;

    }

    if( !xChartController.is() || !xChartModel.is() || !xChartView.is() )

    {

        bOldInvalid = true;

    }

    if( xNewChartModel.get() != xChartModel.get() )

    {

        xChartModel = xNewChartModel;

        bChanged = true;

    }

    if( xNewChartView != xChartView )

    {

        xChartView = xNewChartView;

        bChanged = true;

    }

    if (rpNewParent != pParent)

    {

        pParent = rpNewParent;

        bChanged = true;

    }

    if (pNewChartWindow != pChartWindow)

    {

        pChartWindow = pNewChartWindow;

        bChanged = true;

    }

    if(xChartController != &rNewChartController)

    {

        if (xChartController)

            xChartController->removeSelectionChangeListener(this);

        rNewChartController.addSelectionChangeListener(this);

        xChartController = &rNewChartController;

        bChanged = true;

    }

    if( !xChartController.is() || !xChartModel.is() || !xChartView.is() )

    {

        if(xChartController.is())

        {

            xChartController->removeSelectionChangeListener(this);

            xChartController.clear();

        }

        xChartModel.clear();

        xChartView.clear();

        pParent.clear();

        pChartWindow.reset();

        bNewInvalid = true;

    }

    {

        MutexGuard aGuard( m_aMutex);

        m_xChartController = xChartController.get();

        m_xChartModel = xChartModel.get();

        m_xChartView = xChartView.get();

        m_pParent = pParent.get();

        m_pChartWindow = std::move(pChartWindow);

    }

    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 then

        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(u"ROOT"_ustr);

        aAccInfo.m_xChartDocument = m_xChartModel;

        aAccInfo.m_xChartController = m_xChartController;

        aAccInfo.m_xView = m_xChartView;

        aAccInfo.m_pWindow = m_pChartWindow;

        aAccInfo.m_pParent = nullptr;

        aAccInfo.m_spObjectHierarchy = m_spObjectHierarchy;

        aAccInfo.m_pSdrView = m_pSdrView;

        m_pViewForwarder.reset(new AccessibleViewForwarder(this, m_pChartWindow));

        aAccInfo.m_pViewForwarder = m_pViewForwarder.get();

        // broadcasts an INVALIDATE_ALL_CHILDREN event globally

        SetInfo( aAccInfo );

    }

}

void AccessibleChartView::initialize()

{

    //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;

    rtl::Reference< ::chart::ChartController > xChartController;

    rtl::Reference<::chart::ChartModel> xChartModel;

    rtl::Reference<::chart::ChartView> xChartView;

    {

        MutexGuard aGuard( m_aMutex);

        xChartController = m_xChartController;

        xChartModel = m_xChartModel;

        xChartView = m_xChartView;

    }

    if( !xChartController.is() || !xChartModel.is() || !xChartView.is() )

    {

        bOldInvalid = true;

    }

    if( xChartModel.is() )

    {

        bChanged = true;

        xChartModel = nullptr;

    }

    if( xChartView.is() )

    {

        bChanged = true;

        xChartView = nullptr;

    }

    if( xChartController.is() )

    {

        bChanged = true;

        xChartController->removeSelectionChangeListener(this);

        xChartController = nullptr;

    }

    {

        MutexGuard aGuard( m_aMutex);

        m_xChartController = xChartController.get();

        m_xChartModel = xChartModel.get();

        m_xChartView = xChartView.get();

        m_pParent.clear();

        m_pChartWindow.reset();

    }

    if( bOldInvalid )

        bChanged = false;

    if( !bChanged )

        return;

    {

        //before notification we prepare for creation of new context

        //the old context will be deleted after notification then

        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(u"ROOT"_ustr);

        aAccInfo.m_xChartDocument = m_xChartModel;

        aAccInfo.m_xChartController = m_xChartController;

        aAccInfo.m_xView = m_xChartView;

        aAccInfo.m_pWindow.reset();

        aAccInfo.m_pParent = nullptr;

        aAccInfo.m_spObjectHierarchy = m_spObjectHierarchy;

        aAccInfo.m_pSdrView = m_pSdrView;

        m_pViewForwarder.reset(new AccessibleViewForwarder(this, nullptr));

        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*/ )

{

    rtl::Reference< ::chart::ChartController > xChartController;

    {

        MutexGuard aGuard( m_aMutex);

        xChartController = m_xChartController.get();

    }

    if( !xChartController.is() )

        return;

    ObjectIdentifier aSelectedOID( xChartController->getSelection() );

    if ( m_aCurrentSelectionOID.isValid() )

    {

        NotifyEvent( EventType::LOST_SELECTION, m_aCurrentSelectionOID );

    }

    if( aSelectedOID.isValid() )

    {

        NotifyEvent( EventType::GOT_SELECTION, aSelectedOID );

    }

    m_aCurrentSelectionOID = std::move(aSelectedOID);

}

// XEventListener

void SAL_CALL AccessibleChartView::disposing( const lang::EventObject& /*Source*/ )

{

}

} //namespace chart

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