/* -*- 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 "accessibletabbarpagelist.hxx"

#include <svtools/tabbar.hxx>

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

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

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

#include <com/sun/star/lang/IndexOutOfBoundsException.hpp>

#include <comphelper/accessiblecontexthelper.hxx>

#include <cppuhelper/supportsservice.hxx>

#include <o3tl/safeint.hxx>

#include <unotools/accessiblerelationsethelper.hxx>

#include <vcl/svapp.hxx>

#include <vcl/settings.hxx>

#include <vcl/unohelp.hxx>

#include <vcl/vclevent.hxx>

#include <i18nlangtag/languagetag.hxx>

namespace accessibility

{

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

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

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

using namespace ::com::sun::star;

using namespace ::comphelper;

AccessibleTabBarPageList::AccessibleTabBarPageList( TabBar* pTabBar, sal_Int32 nIndexInParent )

    :ImplInheritanceHelper( pTabBar )

    ,m_nIndexInParent( nIndexInParent )

{

    if ( m_pTabBar )

        m_aAccessibleChildren.assign( m_pTabBar->GetPageCount(), rtl::Reference< AccessibleTabBarPage >() );

}

void AccessibleTabBarPageList::UpdateShowing( bool bShowing )

{

    for (const rtl::Reference<AccessibleTabBarPage>& xChild : m_aAccessibleChildren)

    {

        if ( xChild.is() )

            xChild->SetShowing( bShowing );

    }

}

void AccessibleTabBarPageList::UpdateSelected( sal_Int32 i, bool bSelected )

{

    NotifyAccessibleEvent( AccessibleEventId::SELECTION_CHANGED, Any(), Any() );

    if ( i >= 0 && o3tl::make_unsigned(i) < m_aAccessibleChildren.size() )

    {

        rtl::Reference< AccessibleTabBarPage > xChild( m_aAccessibleChildren[i] );

        if ( xChild.is() )

            xChild->SetSelected( bSelected );

    }

}

void AccessibleTabBarPageList::UpdatePageText( sal_Int32 i )

{

    if ( i < 0 || o3tl::make_unsigned(i) >= m_aAccessibleChildren.size() )

        return;

    if ( m_pTabBar )

    {

        rtl::Reference< AccessibleTabBarPage > pAccessibleTabBarPage( m_aAccessibleChildren[i] );

        if ( pAccessibleTabBarPage.is() )

        {

            OUString sPageText = m_pTabBar->GetPageText( m_pTabBar->GetPageId( static_cast<sal_uInt16>(i) ) );

            pAccessibleTabBarPage->SetPageText( sPageText );

        }

    }

}

void AccessibleTabBarPageList::InsertChild( sal_Int32 i )

{

    if ( i < 0 || o3tl::make_unsigned(i) > m_aAccessibleChildren.size() )

        return;

    // insert entry in child list

    m_aAccessibleChildren.insert( m_aAccessibleChildren.begin() + i, rtl::Reference< AccessibleTabBarPage >() );

    // send accessible child event

    Reference< XAccessible > xChild( getAccessibleChild( i ) );

    if ( xChild.is() )

    {

        Any aOldValue, aNewValue;

        aNewValue <<= xChild;

        NotifyAccessibleEvent( AccessibleEventId::CHILD, aOldValue, aNewValue );

    }

}

void AccessibleTabBarPageList::RemoveChild( sal_Int32 i )

{

    if ( i < 0 || o3tl::make_unsigned(i) >= m_aAccessibleChildren.size() )

        return;

    // get the accessible of the removed page

    rtl::Reference< AccessibleTabBarPage > xChild( m_aAccessibleChildren[i] );

    // remove entry in child list

    m_aAccessibleChildren.erase( m_aAccessibleChildren.begin() + i );

    // send accessible child event

    if ( xChild.is() )

    {

        Any aOldValue, aNewValue;

        aOldValue <<= uno::Reference<XAccessible>(xChild);

        NotifyAccessibleEvent( AccessibleEventId::CHILD, aOldValue, aNewValue );

        xChild->dispose();

    }

}

void AccessibleTabBarPageList::MoveChild( sal_Int32 i, sal_Int32 j )

{

    if ( !(i >= 0 && o3tl::make_unsigned(i) < m_aAccessibleChildren.size() &&

         j >= 0 && o3tl::make_unsigned(j) <= m_aAccessibleChildren.size()) )

        return;

    if ( i < j )

        --j;

    // get the accessible of the moved page

    rtl::Reference< AccessibleTabBarPage > xChild( m_aAccessibleChildren[i] );

    // remove entry in child list at old position

    m_aAccessibleChildren.erase( m_aAccessibleChildren.begin() + i );

    // insert entry in child list at new position

    m_aAccessibleChildren.insert( m_aAccessibleChildren.begin() + j, xChild );

}

void AccessibleTabBarPageList::ProcessWindowEvent( const VclWindowEvent& rVclWindowEvent )

{

     switch ( rVclWindowEvent.GetId() )

     {

        case VclEventId::WindowEnabled:

        {

            Any aNewValue;

            aNewValue <<= AccessibleStateType::SENSITIVE;

            NotifyAccessibleEvent( AccessibleEventId::STATE_CHANGED, Any(), aNewValue );

            aNewValue <<= AccessibleStateType::ENABLED;

            NotifyAccessibleEvent( AccessibleEventId::STATE_CHANGED, Any(), aNewValue );

        }

        break;

        case VclEventId::WindowDisabled:

        {

            Any aOldValue;

            aOldValue <<= AccessibleStateType::ENABLED;

            NotifyAccessibleEvent( AccessibleEventId::STATE_CHANGED, aOldValue, Any() );

            aOldValue <<= AccessibleStateType::SENSITIVE;

            NotifyAccessibleEvent( AccessibleEventId::STATE_CHANGED, aOldValue, Any() );

        }

        break;

        case VclEventId::WindowShow:

        {

            Any aOldValue, aNewValue;

            aNewValue <<= AccessibleStateType::SHOWING;

            NotifyAccessibleEvent( AccessibleEventId::STATE_CHANGED, aOldValue, aNewValue );

            UpdateShowing( true );

        }

        break;

        case VclEventId::WindowHide:

        {

            Any aOldValue, aNewValue;

            aOldValue <<= AccessibleStateType::SHOWING;

            NotifyAccessibleEvent( AccessibleEventId::STATE_CHANGED, aOldValue, aNewValue );

            UpdateShowing( false );

        }

        break;

        case VclEventId::TabbarPageSelected:

        {

            // do nothing

        }

        break;

        case VclEventId::TabbarPageActivated:

        {

            if ( m_pTabBar )

            {

                sal_uInt16 nPageId = static_cast<sal_uInt16>(reinterpret_cast<sal_IntPtr>(rVclWindowEvent.GetData()));

                sal_uInt16 nPagePos = m_pTabBar->GetPagePos( nPageId );

                UpdateSelected( nPagePos, true );

            }

        }

        break;

        case VclEventId::TabbarPageDeactivated:

        {

            if ( m_pTabBar )

            {

                sal_uInt16 nPageId = static_cast<sal_uInt16>(reinterpret_cast<sal_IntPtr>(rVclWindowEvent.GetData()));

                sal_uInt16 nPagePos = m_pTabBar->GetPagePos( nPageId );

                UpdateSelected( nPagePos, false );

            }

        }

        break;

        case VclEventId::TabbarPageInserted:

        {

            if ( m_pTabBar )

            {

                sal_uInt16 nPageId = static_cast<sal_uInt16>(reinterpret_cast<sal_IntPtr>(rVclWindowEvent.GetData()));

                sal_uInt16 nPagePos = m_pTabBar->GetPagePos( nPageId );

                InsertChild( nPagePos );

            }

        }

        break;

        case VclEventId::TabbarPageRemoved:

        {

            if ( m_pTabBar )

            {

                sal_uInt16 nPageId = static_cast<sal_uInt16>(reinterpret_cast<sal_IntPtr>(rVclWindowEvent.GetData()));

                OExternalLockGuard aGuard( this );

                if ( nPageId == TabBar::PAGE_NOT_FOUND )

                {

                    for ( sal_Int32 i = m_aAccessibleChildren.size() - 1; i >= 0; --i )

                        RemoveChild( i );

                }

                else

                {

                    for ( sal_Int64 i = 0, nCount = m_aAccessibleChildren.size(); i < nCount; ++i )

                    {

                        sal_uInt16 nChildPageId = m_pTabBar->GetPageId( static_cast<sal_uInt16>(i) );

                        if (nPageId == nChildPageId)

                        {

                            RemoveChild( i );

                            break;

                        }

                    }

                }

            }

        }

        break;

        case VclEventId::TabbarPageMoved:

        {

            Pair* pPair = static_cast<Pair*>(rVclWindowEvent.GetData());

            if ( pPair )

                MoveChild( pPair->A(), pPair->B() );

        }

        break;

        case VclEventId::TabbarPageTextChanged:

        {

            sal_uInt16 nPageId = static_cast<sal_uInt16>(reinterpret_cast<sal_IntPtr>(rVclWindowEvent.GetData()));

            sal_uInt16 nPagePos = m_pTabBar->GetPagePos( nPageId );

            UpdatePageText( nPagePos );

        }

        break;

        default:

        {

            AccessibleTabBarBase::ProcessWindowEvent( rVclWindowEvent );

        }

        break;

    }

}

void AccessibleTabBarPageList::FillAccessibleStateSet( sal_Int64& rStateSet )

{

    if ( !m_pTabBar )

        return;

    if ( m_pTabBar->IsEnabled() )

    {

        rStateSet |= AccessibleStateType::ENABLED;

        rStateSet |= AccessibleStateType::SENSITIVE;

    }

    rStateSet |= AccessibleStateType::VISIBLE;

    if ( m_pTabBar->IsVisible() )

        rStateSet |= AccessibleStateType::SHOWING;

}

// OAccessible

awt::Rectangle AccessibleTabBarPageList::implGetBounds()

{

    awt::Rectangle aBounds;

    if ( m_pTabBar )

        aBounds = vcl::unohelper::ConvertToAWTRect(m_pTabBar->GetPageArea());

    return aBounds;

}

// XComponent

void AccessibleTabBarPageList::disposing()

{

    AccessibleTabBarBase::disposing();

    // dispose all children

    for (const rtl::Reference<AccessibleTabBarPage>& xComponent : m_aAccessibleChildren)

    {

        if ( xComponent.is() )

            xComponent->dispose();

    }

    m_aAccessibleChildren.clear();

}

// XServiceInfo

OUString AccessibleTabBarPageList::getImplementationName()

{

    return u"com.sun.star.comp.svtools.AccessibleTabBarPageList"_ustr;

}

sal_Bool AccessibleTabBarPageList::supportsService( const OUString& rServiceName )

{

    return cppu::supportsService(this, rServiceName);

}

Sequence< OUString > AccessibleTabBarPageList::getSupportedServiceNames()

{

    return { u"com.sun.star.awt.AccessibleTabBarPageList"_ustr };

}

// XAccessibleContext

sal_Int64 AccessibleTabBarPageList::getAccessibleChildCount()

{

    OExternalLockGuard aGuard( this );

    return m_aAccessibleChildren.size();

}

Reference< XAccessible > AccessibleTabBarPageList::getAccessibleChild( sal_Int64 i )

{

    OExternalLockGuard aGuard( this );

    return getAccessibleChildImpl(i);

}

rtl::Reference< AccessibleTabBarPage > AccessibleTabBarPageList::getAccessibleChildImpl( sal_Int64 i )

{

    if ( i < 0 || i >= getAccessibleChildCount() )

        throw IndexOutOfBoundsException();

    rtl::Reference< AccessibleTabBarPage > xChild = m_aAccessibleChildren[i];

    if ( !xChild.is() )

    {

        if ( m_pTabBar )

        {

            sal_uInt16 nPageId = m_pTabBar->GetPageId( static_cast<sal_uInt16>(i) );

            xChild = new AccessibleTabBarPage( m_pTabBar, nPageId, this );

            // insert into child list

            m_aAccessibleChildren[i] = xChild;

        }

    }

    return xChild;

}

Reference< XAccessible > AccessibleTabBarPageList::getAccessibleParent(  )

{

    OExternalLockGuard aGuard( this );

    Reference< XAccessible > xParent;

    if ( m_pTabBar )

        xParent = m_pTabBar->GetAccessible();

    return xParent;

}

sal_Int64 AccessibleTabBarPageList::getAccessibleIndexInParent(  )

{

    OExternalLockGuard aGuard( this );

    return m_nIndexInParent;

}

sal_Int16 AccessibleTabBarPageList::getAccessibleRole(  )

{

    return AccessibleRole::PAGE_TAB_LIST;

}

OUString AccessibleTabBarPageList::getAccessibleDescription( )

{

    return OUString();

}

OUString AccessibleTabBarPageList::getAccessibleName(  )

{

    return OUString();

}

Reference< XAccessibleRelationSet > AccessibleTabBarPageList::getAccessibleRelationSet(  )

{

    OExternalLockGuard aGuard( this );

    return new utl::AccessibleRelationSetHelper;

}

sal_Int64 AccessibleTabBarPageList::getAccessibleStateSet(  )

{

    OExternalLockGuard aGuard( this );

    sal_Int64 nStateSet = 0;

    if ( !rBHelper.bDisposed && !rBHelper.bInDispose )

    {

        FillAccessibleStateSet( nStateSet );

    }

    else

    {

        nStateSet |= AccessibleStateType::DEFUNC;

    }

    return nStateSet;

}

Locale AccessibleTabBarPageList::getLocale(  )

{

    OExternalLockGuard aGuard( this );

    return Application::GetSettings().GetLanguageTag().getLocale();

}

// XAccessibleComponent

Reference< XAccessible > AccessibleTabBarPageList::getAccessibleAtPoint( const awt::Point& rPoint )

{

    OExternalLockGuard aGuard( this );

    Point aPos = vcl::unohelper::ConvertToVCLPoint(rPoint);

    for ( size_t i = 0; i < m_aAccessibleChildren.size(); ++i )

    {

        rtl::Reference< AccessibleTabBarPage > xAcc = getAccessibleChildImpl( i );

        if ( xAcc.is() )

        {

            tools::Rectangle aRect = vcl::unohelper::ConvertToVCLRect(xAcc->getBounds());

            if (aRect.Contains(aPos))

                return xAcc;

        }

    }

    return nullptr;

}

void AccessibleTabBarPageList::grabFocus(  )

{

    // no focus

}

sal_Int32 AccessibleTabBarPageList::getForeground(  )

{

    OExternalLockGuard aGuard( this );

    sal_Int32 nColor = 0;

    Reference< XAccessible > xParent = getAccessibleParent();

    if ( xParent.is() )

    {

        Reference< XAccessibleComponent > xParentComp( xParent->getAccessibleContext(), UNO_QUERY );

        if ( xParentComp.is() )

            nColor = xParentComp->getForeground();

    }

    return nColor;

}

sal_Int32 AccessibleTabBarPageList::getBackground(  )

{

    OExternalLockGuard aGuard( this );

    sal_Int32 nColor = 0;

    Reference< XAccessible > xParent = getAccessibleParent();

    if ( xParent.is() )

    {

        Reference< XAccessibleComponent > xParentComp( xParent->getAccessibleContext(), UNO_QUERY );

        if ( xParentComp.is() )

            nColor = xParentComp->getBackground();

    }

    return nColor;

}

// XAccessibleSelection

void AccessibleTabBarPageList::selectAccessibleChild( sal_Int64 nChildIndex )

{

    OExternalLockGuard aGuard( this );

    if ( nChildIndex < 0 || nChildIndex >= getAccessibleChildCount() )

        throw IndexOutOfBoundsException();

    if ( m_pTabBar )

    {

        m_pTabBar->SetCurPageId( m_pTabBar->GetPageId( static_cast<sal_uInt16>(nChildIndex) ) );

        m_pTabBar->PaintImmediately();

        m_pTabBar->ActivatePage();

        m_pTabBar->Select();

    }

}

sal_Bool AccessibleTabBarPageList::isAccessibleChildSelected( sal_Int64 nChildIndex )

{

    OExternalLockGuard aGuard( this );

    if ( nChildIndex < 0 || nChildIndex >= getAccessibleChildCount() )

        throw IndexOutOfBoundsException();

    bool bSelected = false;

    if ( m_pTabBar && m_pTabBar->GetCurPageId() == m_pTabBar->GetPageId( static_cast<sal_uInt16>(nChildIndex) ) )

        bSelected = true;

    return bSelected;

}

void AccessibleTabBarPageList::clearAccessibleSelection(  )

{

    // This method makes no sense in a TabBar, and so does nothing.

}

void AccessibleTabBarPageList::selectAllAccessibleChildren(  )

{

    selectAccessibleChild( 0 );

}

sal_Int64 AccessibleTabBarPageList::getSelectedAccessibleChildCount(  )

{

    return 1;

}

Reference< XAccessible > AccessibleTabBarPageList::getSelectedAccessibleChild( sal_Int64 nSelectedChildIndex )

{

    OExternalLockGuard aGuard( this );

    if ( nSelectedChildIndex < 0 || nSelectedChildIndex >= getSelectedAccessibleChildCount() )

        throw IndexOutOfBoundsException();

    Reference< XAccessible > xChild;

    for ( sal_Int64 i = 0, j = 0, nCount = getAccessibleChildCount(); i < nCount; i++ )

    {

        if ( isAccessibleChildSelected( i ) && ( j++ == nSelectedChildIndex ) )

        {

            xChild = getAccessibleChild( i );

            break;

        }

    }

    return xChild;

}

void AccessibleTabBarPageList::deselectAccessibleChild( sal_Int64 nChildIndex )

{

    OExternalLockGuard aGuard( this );

    if ( nChildIndex < 0 || nChildIndex >= getAccessibleChildCount() )

        throw IndexOutOfBoundsException();

    // This method makes no sense in a TabBar, and so does nothing.

}

}   // namespace accessibility

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