/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the Collabora Office 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 <i18nlangtag/languagetag.hxx>


namespace accessibility
{

using namespace ::com::sun::star::accessibility;
using namespace ::com::sun::star::uno;
using namespace cpo::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;
}


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();
    }
}


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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