/* -*- 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/accessibletabbar.hxx>
#include <svtools/tabbar.hxx>
#include <extended/accessibletabbarpagelist.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/awt/XDevice.hpp>
#include <com/sun/star/awt/XVclWindowPeer.hpp>
#include <com/sun/star/lang/IndexOutOfBoundsException.hpp>
#include <comphelper/accessiblecontexthelper.hxx>
#include <cppuhelper/supportsservice.hxx>
#include <unotools/accessiblerelationsethelper.hxx>
#include <i18nlangtag/languagetag.hxx>
#include <o3tl/safeint.hxx>
#include <vcl/svapp.hxx>
#include <vcl/settings.hxx>
#include <toolkit/awt/vclxfont.hxx>
#include <toolkit/helper/convert.hxx>


namespace accessibility
{


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




    AccessibleTabBar::AccessibleTabBar( TabBar* pTabBar )
        :ImplInheritanceHelper( pTabBar )
    {
        if ( m_pTabBar )
            m_aAccessibleChildren.assign( m_pTabBar->GetAccessibleChildWindowCount() + 1, Reference< XAccessible >() );
    }


    void AccessibleTabBar::ProcessWindowEvent( const VclWindowEvent& rVclWindowEvent )
    {
        Any aOldValue, aNewValue;

        switch ( rVclWindowEvent.GetId() )
        {
            case VclEventId::WindowEnabled:
            {
                aNewValue <<= AccessibleStateType::SENSITIVE;
                NotifyAccessibleEvent( AccessibleEventId::STATE_CHANGED, aOldValue, aNewValue );
                aNewValue <<= AccessibleStateType::ENABLED;
                NotifyAccessibleEvent( AccessibleEventId::STATE_CHANGED, aOldValue, aNewValue );
            }
            break;
            case VclEventId::WindowDisabled:
            {
                aOldValue <<= AccessibleStateType::ENABLED;
                NotifyAccessibleEvent( AccessibleEventId::STATE_CHANGED, aOldValue, aNewValue );
                aOldValue <<= AccessibleStateType::SENSITIVE;
                NotifyAccessibleEvent( AccessibleEventId::STATE_CHANGED, aOldValue, aNewValue );
            }
            break;
            case VclEventId::WindowGetFocus:
            {
                aNewValue <<= AccessibleStateType::FOCUSED;
                NotifyAccessibleEvent( AccessibleEventId::STATE_CHANGED, aOldValue, aNewValue );
            }
            break;
            case VclEventId::WindowLoseFocus:
            {
                aOldValue <<= AccessibleStateType::FOCUSED;
                NotifyAccessibleEvent( AccessibleEventId::STATE_CHANGED, aOldValue, aNewValue );
            }
            break;
            case VclEventId::WindowShow:
            {
                aNewValue <<= AccessibleStateType::SHOWING;
                NotifyAccessibleEvent( AccessibleEventId::STATE_CHANGED, aOldValue, aNewValue );
            }
            break;
            case VclEventId::WindowHide:
            {
                aOldValue <<= AccessibleStateType::SHOWING;
                NotifyAccessibleEvent( AccessibleEventId::STATE_CHANGED, aOldValue, aNewValue );
            }
            break;
            default:
            {
                AccessibleTabBarBase::ProcessWindowEvent( rVclWindowEvent );
            }
            break;
        }
    }


    void AccessibleTabBar::FillAccessibleStateSet( sal_Int64& rStateSet )
    {
        if ( !m_pTabBar )
            return;

        if ( m_pTabBar->IsEnabled() )
        {
            rStateSet |= AccessibleStateType::ENABLED;
            rStateSet |= AccessibleStateType::SENSITIVE;
        }

        rStateSet |= AccessibleStateType::FOCUSABLE;

        if ( m_pTabBar->HasFocus() )
            rStateSet |= AccessibleStateType::FOCUSED;

        rStateSet |= AccessibleStateType::VISIBLE;

        if ( m_pTabBar->IsVisible() )
            rStateSet |= AccessibleStateType::SHOWING;

        if ( m_pTabBar->GetStyle() & WB_SIZEABLE )
            rStateSet |= AccessibleStateType::RESIZABLE;
    }


    // OCommonAccessibleComponent


    awt::Rectangle AccessibleTabBar::implGetBounds()
    {
        awt::Rectangle aBounds;
        if ( m_pTabBar )
            aBounds = AWTRectangle( tools::Rectangle( m_pTabBar->GetPosPixel(), m_pTabBar->GetSizePixel() ) );

        return aBounds;
    }


    // XComponent


    void AccessibleTabBar::disposing()
    {
        AccessibleTabBarBase::disposing();

        // dispose all children
        for (const Reference<XAccessible>& i : m_aAccessibleChildren)
        {
            Reference< XComponent > xComponent( i, UNO_QUERY );
            if ( xComponent.is() )
                xComponent->dispose();
        }
        m_aAccessibleChildren.clear();
    }


    // XServiceInfo


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


    sal_Bool AccessibleTabBar::supportsService( const OUString& rServiceName )
    {
        return cppu::supportsService(this, rServiceName);
    }


    Sequence< OUString > AccessibleTabBar::getSupportedServiceNames()
    {
        return  { "com.sun.star.awt.AccessibleTabBar" };
    }


    // XAccessible


    Reference< XAccessibleContext > AccessibleTabBar::getAccessibleContext(  )
    {
        OExternalLockGuard aGuard( this );

        return this;
    }


    // XAccessibleContext


    sal_Int64 AccessibleTabBar::getAccessibleChildCount()
    {
        OExternalLockGuard aGuard( this );

        return m_aAccessibleChildren.size();
    }


    Reference< XAccessible > AccessibleTabBar::getAccessibleChild( sal_Int64 i )
    {
        OExternalLockGuard aGuard( this );

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

        Reference< XAccessible > xChild = m_aAccessibleChildren[i];
        if ( !xChild.is() )
        {
            if ( m_pTabBar )
            {
                sal_Int32 nCount = m_pTabBar->GetAccessibleChildWindowCount();

                if ( i < nCount )
                {
                    vcl::Window* pChild = m_pTabBar->GetAccessibleChildWindow( static_cast<sal_uInt16>(i) );
                    if ( pChild )
                        xChild = pChild->GetAccessible();
                }
                else if ( i == nCount )
                {
                    xChild = new AccessibleTabBarPageList( m_pTabBar, i );
                }

                // insert into child list
                m_aAccessibleChildren[i] = xChild;
            }
        }

        return xChild;
    }


    Reference< XAccessible > AccessibleTabBar::getAccessibleParent(  )
    {
        OExternalLockGuard aGuard( this );

        Reference< XAccessible > xParent;
        if ( m_pTabBar )
        {
            vcl::Window* pParent = m_pTabBar->GetAccessibleParentWindow();
            if ( pParent )
                xParent = pParent->GetAccessible();
        }

        return xParent;
    }


    sal_Int64 AccessibleTabBar::getAccessibleIndexInParent(  )
    {
        OExternalLockGuard aGuard( this );

        sal_Int64 nIndexInParent = -1;
        if ( m_pTabBar )
        {
            vcl::Window* pParent = m_pTabBar->GetAccessibleParentWindow();
            if ( pParent )
            {
                for ( sal_uInt16 i = 0, nCount = pParent->GetAccessibleChildWindowCount(); i < nCount; ++i )
                {
                    vcl::Window* pChild = pParent->GetAccessibleChildWindow( i );
                    if ( pChild == static_cast< vcl::Window* >( m_pTabBar ) )
                    {
                        nIndexInParent = i;
                        break;
                    }
                }
            }
        }

        return nIndexInParent;
    }


    sal_Int16 AccessibleTabBar::getAccessibleRole(  )
    {
        OExternalLockGuard aGuard( this );

        return AccessibleRole::PANEL;
    }


    OUString AccessibleTabBar::getAccessibleDescription( )
    {
        OExternalLockGuard aGuard( this );

        OUString sDescription;
        if ( m_pTabBar )
            sDescription = m_pTabBar->GetAccessibleDescription();

        return sDescription;
    }


    OUString AccessibleTabBar::getAccessibleName(  )
    {
        OExternalLockGuard aGuard( this );

        OUString sName;
        if ( m_pTabBar )
            sName = m_pTabBar->GetAccessibleName();

        return sName;
    }


    Reference< XAccessibleRelationSet > AccessibleTabBar::getAccessibleRelationSet(  )
    {
        OExternalLockGuard aGuard( this );

        return new utl::AccessibleRelationSetHelper;
    }


    sal_Int64 AccessibleTabBar::getAccessibleStateSet(  )
    {
        OExternalLockGuard aGuard( this );

        sal_Int64 nStateSet = 0;

        if ( !rBHelper.bDisposed && !rBHelper.bInDispose )
        {
            FillAccessibleStateSet( nStateSet );
        }
        else
        {
            nStateSet |= AccessibleStateType::DEFUNC;
        }

        return nStateSet;
    }


    Locale AccessibleTabBar::getLocale(  )
    {
        OExternalLockGuard aGuard( this );

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


    // XAccessibleComponent


    Reference< XAccessible > AccessibleTabBar::getAccessibleAtPoint( const awt::Point& rPoint )
    {
        OExternalLockGuard aGuard( this );

        Reference< XAccessible > xChild;
        for ( size_t i = 0; i < m_aAccessibleChildren.size(); ++i )
        {
            Reference< XAccessible > xAcc = getAccessibleChild( i );
            if ( xAcc.is() )
            {
                Reference< XAccessibleComponent > xComp( xAcc->getAccessibleContext(), UNO_QUERY );
                if ( xComp.is() )
                {
                    tools::Rectangle aRect = VCLRectangle( xComp->getBounds() );
                    Point aPos = VCLPoint( rPoint );
                    if ( aRect.Contains( aPos ) )
                    {
                        xChild = xAcc;
                        break;
                    }
                }
            }
        }

        return xChild;
    }


    void AccessibleTabBar::grabFocus(  )
    {
        OExternalLockGuard aGuard( this );

        if ( m_pTabBar )
            m_pTabBar->GrabFocus();
    }


    sal_Int32 AccessibleTabBar::getForeground(  )
    {
        OExternalLockGuard aGuard( this );

        Color nColor;
        if ( m_pTabBar )
        {
            if ( m_pTabBar->IsControlForeground() )
                nColor = m_pTabBar->GetControlForeground();
            else
            {
                vcl::Font aFont;
                if ( m_pTabBar->IsControlFont() )
                    aFont = m_pTabBar->GetControlFont();
                else
                    aFont = m_pTabBar->GetFont();
                nColor = aFont.GetColor();
            }
        }

        return sal_Int32(nColor);
    }


    sal_Int32 AccessibleTabBar::getBackground(  )
    {
        OExternalLockGuard aGuard( this );

        Color nColor;
        if ( m_pTabBar )
        {
            if ( m_pTabBar->IsControlBackground() )
                nColor = m_pTabBar->GetControlBackground();
            else
                nColor = m_pTabBar->GetBackground().GetColor();
        }

        return sal_Int32(nColor);
    }


    // XAccessibleExtendedComponent


    Reference< awt::XFont > AccessibleTabBar::getFont(  )
    {
        OExternalLockGuard aGuard( this );

        Reference< awt::XFont > xFont;
        if ( m_pTabBar )
        {
            Reference< awt::XDevice > xDev( m_pTabBar->GetComponentInterface(), UNO_QUERY );
            if ( xDev.is() )
            {
                vcl::Font aFont;
                if ( m_pTabBar->IsControlFont() )
                    aFont = m_pTabBar->GetControlFont();
                else
                    aFont = m_pTabBar->GetFont();
                rtl::Reference<VCLXFont> pVCLXFont = new VCLXFont;
                pVCLXFont->Init( *xDev, aFont );
                xFont = pVCLXFont;
            }
        }

        return xFont;
    }


    OUString AccessibleTabBar::getTitledBorderText(  )
    {
        OExternalLockGuard aGuard( this );

        OUString sText;
        if ( m_pTabBar )
            sText = m_pTabBar->GetText();

        return sText;
    }


    OUString AccessibleTabBar::getToolTipText(  )
    {
        OExternalLockGuard aGuard( this );

        OUString sText;
        if ( m_pTabBar )
            sText = m_pTabBar->GetQuickHelpText();

        return sText;
    }


}   // namespace accessibility


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