/* -*- 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
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 *   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 <accessibility/standard/vclxaccessiblecheckbox.hxx>

#include <toolkit/awt/vclxwindows.hxx>
#include <accessibility/helper/accresmgr.hxx>
#include <accessibility/helper/accessiblestrings.hrc>

#include <unotools/accessiblestatesethelper.hxx>
#include <comphelper/accessiblekeybindinghelper.hxx>
#include <com/sun/star/awt/KeyModifier.hpp>
#include <com/sun/star/accessibility/AccessibleStateType.hpp>
#include <com/sun/star/accessibility/AccessibleEventId.hpp>
#include <cppuhelper/typeprovider.hxx>
#include <comphelper/sequence.hxx>

#include <vcl/button.hxx>

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



// VCLXAccessibleCheckBox


VCLXAccessibleCheckBox::VCLXAccessibleCheckBox( VCLXWindow* pVCLWindow )
    :VCLXAccessibleTextComponent( pVCLWindow )
{
    m_bChecked = IsChecked();
    m_bIndeterminate = IsIndeterminate();
}



VCLXAccessibleCheckBox::~VCLXAccessibleCheckBox()
{
}



bool VCLXAccessibleCheckBox::IsChecked()
{
    bool bChecked = false;

    VCLXCheckBox* pVCLXCheckBox = static_cast< VCLXCheckBox* >( GetVCLXWindow() );
    if ( pVCLXCheckBox && pVCLXCheckBox->getState() == (sal_Int16) 1 )
        bChecked = true;

    return bChecked;
}



bool VCLXAccessibleCheckBox::IsIndeterminate()
{
    bool bIndeterminate = false;

    VCLXCheckBox* pVCLXCheckBox = static_cast< VCLXCheckBox* >( GetVCLXWindow() );
    if ( pVCLXCheckBox && pVCLXCheckBox->getState() == (sal_Int16) 2 )
        bIndeterminate = true;

    return bIndeterminate;
}



void VCLXAccessibleCheckBox::SetChecked( bool bChecked )
{
    if ( m_bChecked != bChecked )
    {
        Any aOldValue, aNewValue;
        if ( m_bChecked )
            aOldValue <<= AccessibleStateType::CHECKED;
        else
            aNewValue <<= AccessibleStateType::CHECKED;
        m_bChecked = bChecked;
        NotifyAccessibleEvent( AccessibleEventId::STATE_CHANGED, aOldValue, aNewValue );
    }
}



void VCLXAccessibleCheckBox::SetIndeterminate( bool bIndeterminate )
{
    if ( m_bIndeterminate != bIndeterminate )
    {
        Any aOldValue, aNewValue;
        if ( m_bIndeterminate )
            aOldValue <<= AccessibleStateType::INDETERMINATE;
        else
            aNewValue <<= AccessibleStateType::INDETERMINATE;
        m_bIndeterminate = bIndeterminate;
        NotifyAccessibleEvent( AccessibleEventId::STATE_CHANGED, aOldValue, aNewValue );
    }
}



void VCLXAccessibleCheckBox::ProcessWindowEvent( const VclWindowEvent& rVclWindowEvent )
{
    switch ( rVclWindowEvent.GetId() )
    {
        case VCLEVENT_CHECKBOX_TOGGLE:
        {
            SetChecked( IsChecked() );
            SetIndeterminate( IsIndeterminate() );
        }
        break;
        default:
            VCLXAccessibleTextComponent::ProcessWindowEvent( rVclWindowEvent );
   }
}



void VCLXAccessibleCheckBox::FillAccessibleStateSet( utl::AccessibleStateSetHelper& rStateSet )
{
    VCLXAccessibleTextComponent::FillAccessibleStateSet( rStateSet );

    rStateSet.AddState( AccessibleStateType::FOCUSABLE );

    if ( IsChecked() )
        rStateSet.AddState( AccessibleStateType::CHECKED );

    if ( IsIndeterminate() )
        rStateSet.AddState( AccessibleStateType::INDETERMINATE );
}


// XInterface


IMPLEMENT_FORWARD_XINTERFACE2( VCLXAccessibleCheckBox, VCLXAccessibleTextComponent, VCLXAccessibleCheckBox_BASE )


// XTypeProvider


IMPLEMENT_FORWARD_XTYPEPROVIDER2( VCLXAccessibleCheckBox, VCLXAccessibleTextComponent, VCLXAccessibleCheckBox_BASE )


// XServiceInfo


OUString VCLXAccessibleCheckBox::getImplementationName() throw (RuntimeException, std::exception)
{
    return OUString( "com.sun.star.comp.toolkit.AccessibleCheckBox" );
}



Sequence< OUString > VCLXAccessibleCheckBox::getSupportedServiceNames() throw (RuntimeException, std::exception)
{
    Sequence< OUString > aNames { "com.sun.star.awt.AccessibleCheckBox" };
    return aNames;
}


// XAccessibleAction


sal_Int32 VCLXAccessibleCheckBox::getAccessibleActionCount( ) throw (RuntimeException, std::exception)
{
    OExternalLockGuard aGuard( this );

    return 1;
}



sal_Bool VCLXAccessibleCheckBox::doAccessibleAction ( sal_Int32 nIndex ) throw (IndexOutOfBoundsException, RuntimeException, std::exception)
{
    OExternalLockGuard aGuard( this );

    if ( nIndex < 0 || nIndex >= getAccessibleActionCount() )
        throw IndexOutOfBoundsException();

    VclPtr< CheckBox > pCheckBox = GetAs< CheckBox >();
    VCLXCheckBox* pVCLXCheckBox = static_cast< VCLXCheckBox* >( GetVCLXWindow() );
    if ( pCheckBox && pVCLXCheckBox )
    {
        sal_Int32 nValueMin = (sal_Int32) 0;
        sal_Int32 nValueMax = (sal_Int32) 1;

        if ( pCheckBox->IsTriStateEnabled() )
            nValueMax = (sal_Int32) 2;

        sal_Int32 nValue = (sal_Int32) pVCLXCheckBox->getState();

        ++nValue;

        if ( nValue > nValueMax )
            nValue = nValueMin;

        pVCLXCheckBox->setState( (sal_Int16) nValue );
    }

    return true;
}



OUString VCLXAccessibleCheckBox::getAccessibleActionDescription ( sal_Int32 nIndex ) throw (IndexOutOfBoundsException, RuntimeException, std::exception)
{
    OExternalLockGuard aGuard( this );

    if ( nIndex < 0 || nIndex >= getAccessibleActionCount() )
        throw IndexOutOfBoundsException();

    if(IsChecked())
        return TK_RES_STRING( RID_STR_ACC_ACTION_UNCHECK );
    else
        return TK_RES_STRING( RID_STR_ACC_ACTION_CHECK );
}



Reference< XAccessibleKeyBinding > VCLXAccessibleCheckBox::getAccessibleActionKeyBinding( sal_Int32 nIndex ) throw (IndexOutOfBoundsException, RuntimeException, std::exception)
{
    OExternalLockGuard aGuard( this );

    if ( nIndex < 0 || nIndex >= getAccessibleActionCount() )
        throw IndexOutOfBoundsException();

    OAccessibleKeyBindingHelper* pKeyBindingHelper = new OAccessibleKeyBindingHelper();
    Reference< XAccessibleKeyBinding > xKeyBinding = pKeyBindingHelper;

    vcl::Window* pWindow = GetWindow();
    if ( pWindow )
    {
        KeyEvent aKeyEvent = pWindow->GetActivationKey();
        vcl::KeyCode aKeyCode = aKeyEvent.GetKeyCode();
        if ( aKeyCode.GetCode() != 0 )
        {
            awt::KeyStroke aKeyStroke;
            aKeyStroke.Modifiers = 0;
            if ( aKeyCode.IsShift() )
                aKeyStroke.Modifiers |= awt::KeyModifier::SHIFT;
            if ( aKeyCode.IsMod1() )
                aKeyStroke.Modifiers |= awt::KeyModifier::MOD1;
            if ( aKeyCode.IsMod2() )
                aKeyStroke.Modifiers |= awt::KeyModifier::MOD2;
            if ( aKeyCode.IsMod3() )
                aKeyStroke.Modifiers |= awt::KeyModifier::MOD3;
            aKeyStroke.KeyCode = aKeyCode.GetCode();
            aKeyStroke.KeyChar = aKeyEvent.GetCharCode();
            aKeyStroke.KeyFunc = static_cast< sal_Int16 >( aKeyCode.GetFunction() );
            pKeyBindingHelper->AddKeyBinding( aKeyStroke );
        }
    }

    return xKeyBinding;
}


// XAccessibleValue


Any VCLXAccessibleCheckBox::getCurrentValue(  ) throw (RuntimeException, std::exception)
{
    OExternalLockGuard aGuard( this );

    Any aValue;

    VCLXCheckBox* pVCLXCheckBox = static_cast< VCLXCheckBox* >( GetVCLXWindow() );
    if ( pVCLXCheckBox )
        aValue <<= (sal_Int32) pVCLXCheckBox->getState();

    return aValue;
}



sal_Bool VCLXAccessibleCheckBox::setCurrentValue( const Any& aNumber ) throw (RuntimeException, std::exception)
{
    OExternalLockGuard aGuard( this );

    bool bReturn = false;

    VCLXCheckBox* pVCLXCheckBox = static_cast< VCLXCheckBox* >( GetVCLXWindow() );
    if ( pVCLXCheckBox )
    {
        sal_Int32 nValue = 0, nValueMin = 0, nValueMax = 0;
        OSL_VERIFY( aNumber >>= nValue );
        OSL_VERIFY( getMinimumValue() >>= nValueMin );
        OSL_VERIFY( getMaximumValue() >>= nValueMax );

        if ( nValue < nValueMin )
            nValue = nValueMin;
        else if ( nValue > nValueMax )
            nValue = nValueMax;

        pVCLXCheckBox->setState( (sal_Int16) nValue );
        bReturn = true;
    }

    return bReturn;
}



Any VCLXAccessibleCheckBox::getMaximumValue(  ) throw (RuntimeException, std::exception)
{
    OExternalLockGuard aGuard( this );

    Any aValue;

    VclPtr< CheckBox > pCheckBox = GetAs< CheckBox >();
    if ( pCheckBox && pCheckBox->IsTriStateEnabled() )
        aValue <<= (sal_Int32) 2;
    else
        aValue <<= (sal_Int32) 1;

    return aValue;
}



Any VCLXAccessibleCheckBox::getMinimumValue(  ) throw (RuntimeException, std::exception)
{
    OExternalLockGuard aGuard( this );

    Any aValue;
    aValue <<= (sal_Int32) 0;

    return aValue;
}



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