/* -*- 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 <extended/accessibletablistboxtable.hxx>
#include <extended/AccessibleBrowseBoxTableCell.hxx>
#include <extended/AccessibleBrowseBoxCheckBoxCell.hxx>
#include <com/sun/star/accessibility/AccessibleEventId.hpp>
#include <com/sun/star/accessibility/AccessibleStateType.hpp>
#include <com/sun/star/lang/IndexOutOfBoundsException.hpp>
#include <vcl/toolkit/svtabbx.hxx>

namespace accessibility
{


    // class AccessibleTabListBoxTable ---------------------------------------------

    using namespace ::com::sun::star::accessibility;
    using namespace ::com::sun::star::uno;
    using namespace ::com::sun::star::lang;
    using namespace ::com::sun::star;


    // Ctor() and Dtor()

    AccessibleTabListBoxTable::AccessibleTabListBoxTable( const Reference< XAccessible >& rxParent, SvHeaderTabListBox& rBox ) :

        AccessibleBrowseBoxTable( rxParent, rBox ),

        m_pTabListBox   ( &rBox )

    {
        m_pTabListBox->AddEventListener( LINK( this, AccessibleTabListBoxTable, WindowEventListener ) );
    }

    AccessibleTabListBoxTable::~AccessibleTabListBoxTable()
    {
        if ( isAlive() )
        {
            m_pTabListBox = nullptr;

            // increment ref count to prevent double call of Dtor
            osl_atomic_increment( &m_refCount );
            dispose();
        }
    }

    void AccessibleTabListBoxTable::ProcessWindowEvent( const VclWindowEvent& rVclWindowEvent )
    {
        if ( !isAlive() )
            return;

        switch ( VclEventId nEventId = rVclWindowEvent.GetId(); nEventId )
        {
            case  VclEventId::ObjectDying :
            {
                m_pTabListBox->RemoveEventListener( LINK( this, AccessibleTabListBoxTable, WindowEventListener ) );
                m_pTabListBox = nullptr;
                break;
            }

            case VclEventId::ControlGetFocus :
            case VclEventId::ControlLoseFocus :
            {
                uno::Any aOldValue, aNewValue;
                if ( nEventId == VclEventId::ControlGetFocus )
                    aNewValue <<= AccessibleStateType::FOCUSED;
                else
                    aOldValue <<= AccessibleStateType::FOCUSED;
                commitEvent( AccessibleEventId::STATE_CHANGED, aNewValue, aOldValue );
                break;
            }

            case VclEventId::ListboxSelect :
            {
                // First send an event that tells the listeners of a
                // modified selection.  The active descendant event is
                // send after that so that the receiving AT has time to
                // read the text or name of the active child.
                commitEvent( AccessibleEventId::SELECTION_CHANGED, Any(), Any() );
                if ( m_pTabListBox && m_pTabListBox->HasFocus() )
                {
                    SvTreeListEntry* pEntry = static_cast< SvTreeListEntry* >( rVclWindowEvent.GetData() );
                    if ( pEntry )
                    {
                        sal_Int32 nRow = m_pTabListBox->GetEntryPos( pEntry );
                        sal_uInt16 nCol = m_pTabListBox->GetCurrColumn();
                        Reference< XAccessible > xChild =
                            m_pTabListBox->CreateAccessibleCell( nRow, nCol );
                        uno::Any aOldValue, aNewValue;
                        aNewValue <<= xChild;
                        commitEvent( AccessibleEventId::ACTIVE_DESCENDANT_CHANGED, aNewValue, aOldValue );
                    }
                }
                break;
            }
            case VclEventId::WindowGetFocus :
            {
                uno::Any aOldValue, aNewValue;
                aNewValue <<= AccessibleStateType::FOCUSED;
                commitEvent( AccessibleEventId::STATE_CHANGED, aNewValue, aOldValue );
                break;

            }
            case VclEventId::WindowLoseFocus :
            {
                uno::Any aOldValue, aNewValue;
                aOldValue <<= AccessibleStateType::FOCUSED;
                commitEvent( AccessibleEventId::STATE_CHANGED, aNewValue, aOldValue );
                break;
            }
            case VclEventId::ListboxTreeSelect:
                {
                    SvTreeListEntry* pEntry = static_cast< SvTreeListEntry* >( rVclWindowEvent.GetData() );
                    if (pEntry)
                    {
                        sal_Int32 nRow = m_pTabListBox->GetEntryPos( pEntry );
                        Reference< XAccessible > xChild = m_pTabListBox->CreateAccessibleCell( nRow, m_pTabListBox->GetCurrColumn() );
                        TriState eState = TRISTATE_INDET;
                        if ( m_pTabListBox->IsCellCheckBox( nRow, m_pTabListBox->GetCurrColumn(), eState ) )
                        {
                            AccessibleCheckBoxCell* pCell = static_cast< AccessibleCheckBoxCell* >( xChild.get() );
                            pCell->commitEvent( AccessibleEventId::SELECTION_CHANGED, Any(), Any() );
                        }
                        else
                        {
                            AccessibleBrowseBoxTableCell* pCell = static_cast< AccessibleBrowseBoxTableCell* >( xChild.get() );
                            pCell->commitEvent( AccessibleEventId::SELECTION_CHANGED, Any(), Any() );
                        }
                    }
                }
                break;
            case VclEventId::ListboxTreeFocus:
                {
                    if ( m_pTabListBox && m_pTabListBox->HasFocus() )
                    {
                        uno::Any aOldValue, aNewValue;
                        SvTreeListEntry* pEntry = static_cast< SvTreeListEntry* >( rVclWindowEvent.GetData() );
                        if ( pEntry )
                        {
                            sal_Int32 nRow = m_pTabListBox->GetEntryPos( pEntry );
                            m_xCurChild = m_pTabListBox->CreateAccessibleCell( nRow, m_pTabListBox->GetCurrColumn() );
                            aNewValue <<= m_xCurChild;
                            commitEvent( AccessibleEventId::ACTIVE_DESCENDANT_CHANGED, aNewValue ,aOldValue);
                        }
                        else
                        {
                            aNewValue <<= AccessibleStateType::FOCUSED;
                            commitEvent( AccessibleEventId::STATE_CHANGED, aNewValue ,aOldValue);
                        }
                    }
                }
                break;

            case VclEventId::CheckboxToggle :
            {
                if ( m_pTabListBox && m_pTabListBox->HasFocus() )
                {
                    SvTreeListEntry* pEntry = static_cast< SvTreeListEntry* >( rVclWindowEvent.GetData() );
                    if ( pEntry )
                    {
                        sal_Int32 nRow = m_pTabListBox->GetEntryPos( pEntry );
                        sal_uInt16 nCol = m_pTabListBox->GetCurrColumn();
                        TriState eState = TRISTATE_INDET;
                        if ( m_pTabListBox->IsCellCheckBox( nRow, nCol, eState ) )
                        {
                            Reference< XAccessible > xChild =
                                m_pTabListBox->CreateAccessibleCell( nRow, nCol );
                            AccessibleCheckBoxCell* pCell =
                                static_cast< AccessibleCheckBoxCell* >( xChild.get() );
                            pCell->SetChecked( SvHeaderTabListBox::IsItemChecked( pEntry, nCol ) );
                        }
                    }
                }
                break;
            }

            default: break;
        }
    }

    IMPL_LINK( AccessibleTabListBoxTable, WindowEventListener, VclWindowEvent&, rEvent, void )
    {
        OSL_ENSURE( rEvent.GetWindow() && m_pTabListBox, "no event window" );
        ProcessWindowEvent( rEvent );
    }
    // helpers --------------------------------------------------------------------

    void AccessibleTabListBoxTable::ensureValidIndex( sal_Int64 _nIndex ) const
    {
        if ( ( _nIndex < 0 ) || ( _nIndex >= static_cast<sal_Int64>((implGetRowCount()) * static_cast<sal_Int64>(implGetColumnCount()))))
            throw IndexOutOfBoundsException();
    }

    void AccessibleTabListBoxTable::implSelectRow( sal_Int32 _nRow, bool _bSelect )
    {
        if ( m_pTabListBox )
            m_pTabListBox->SelectRow(_nRow, _bSelect);
    }

    sal_Int32 AccessibleTabListBoxTable::implGetRowCount() const
    {
        return m_pTabListBox ? m_pTabListBox->GetEntryCount() : 0;
    }

    sal_Int32 AccessibleTabListBoxTable::implGetColumnCount() const
    {
        return m_pTabListBox ? m_pTabListBox->GetColumnCount() : 0;
    }

    sal_Int32 AccessibleTabListBoxTable::implGetSelRowCount() const
    {
        return m_pTabListBox ? m_pTabListBox->GetSelectionCount() : 0;
    }

    sal_Int32 AccessibleTabListBoxTable::implGetSelRow( sal_Int32 nSelRow ) const
    {
        if ( m_pTabListBox )
        {
            sal_Int32 nRow = 0;
            SvTreeListEntry* pEntry = m_pTabListBox->FirstSelected();
            while ( pEntry )
            {
                if ( nRow == nSelRow )
                    return m_pTabListBox->GetEntryPos( pEntry );
                pEntry = m_pTabListBox->NextSelected( pEntry );
                ++nRow;
            }
        }

        return 0;
    }

    // XInterface & XTypeProvider

    IMPLEMENT_FORWARD_XINTERFACE2(AccessibleTabListBoxTable, AccessibleBrowseBoxTable, AccessibleTabListBoxTableImplHelper)
    IMPLEMENT_FORWARD_XTYPEPROVIDER2(AccessibleTabListBoxTable, AccessibleBrowseBoxTable, AccessibleTabListBoxTableImplHelper)

    // XServiceInfo

    OUString AccessibleTabListBoxTable::getImplementationName()
    {
        return u"com.sun.star.comp.svtools.AccessibleTabListBoxTable"_ustr;
    }

    // XAccessibleSelection

    void SAL_CALL AccessibleTabListBoxTable::selectAccessibleChild( sal_Int64 nChildIndex )
    {
        SolarMutexGuard aSolarGuard;
        ::osl::MutexGuard aGuard( getMutex() );

        ensureIsAlive();
        ensureValidIndex( nChildIndex );

        implSelectRow( implGetRow( nChildIndex ), true );
    }

    sal_Bool SAL_CALL AccessibleTabListBoxTable::isAccessibleChildSelected( sal_Int64 nChildIndex )
    {
        SolarMutexGuard aSolarGuard;
        ::osl::MutexGuard aGuard( getMutex() );

        ensureIsAlive();
        ensureValidIndex( nChildIndex );

        return m_pTabListBox && m_pTabListBox->IsRowSelected(implGetRow(nChildIndex));
    }

    void SAL_CALL AccessibleTabListBoxTable::clearAccessibleSelection(  )
    {
        SolarMutexGuard aSolarGuard;
        ::osl::MutexGuard aGuard( getMutex() );

        ensureIsAlive();

        m_pTabListBox->SetNoSelection();
    }

    void SAL_CALL AccessibleTabListBoxTable::selectAllAccessibleChildren(  )
    {
        SolarMutexGuard aSolarGuard;
        ::osl::MutexGuard aGuard( getMutex() );

        ensureIsAlive();

        m_pTabListBox->SelectAll();
    }

    sal_Int64 SAL_CALL AccessibleTabListBoxTable::getSelectedAccessibleChildCount(  )
    {
        SolarMutexGuard aSolarGuard;
        ::osl::MutexGuard aGuard( getMutex() );

        ensureIsAlive();

        return static_cast<sal_Int64>(implGetColumnCount()) * static_cast<sal_Int64>(implGetSelRowCount());
    }

    Reference< XAccessible > SAL_CALL AccessibleTabListBoxTable::getSelectedAccessibleChild( sal_Int64 nSelectedChildIndex )
    {
        SolarMutexGuard aSolarGuard;
        ::osl::MutexGuard aGuard( getMutex() );

        ensureIsAlive();

        const sal_Int32 nColCount = implGetColumnCount();

        if (nColCount == 0)
            throw IndexOutOfBoundsException();

        const sal_Int32 nRow = implGetSelRow(nSelectedChildIndex / nColCount);
        const sal_Int32 nColumn = nSelectedChildIndex % nColCount;
        return getAccessibleCellAt( nRow, nColumn );
    }

    void SAL_CALL AccessibleTabListBoxTable::deselectAccessibleChild( sal_Int64 nSelectedChildIndex )
    {
        SolarMutexGuard aSolarGuard;
        ::osl::MutexGuard aGuard( getMutex() );

        ensureIsAlive();
        ensureValidIndex( nSelectedChildIndex );

        implSelectRow( implGetRow( nSelectedChildIndex ), false );
    }


}// namespace accessibility


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