/* -*- 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 <accessibility/vclxaccessiblebutton.hxx>

#include <svdata.hxx>

#include <strings.hrc>

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

#include <vcl/accessibility/strings.hxx>

#include <vcl/toolkit/button.hxx>

#include <vcl/event.hxx>

#include <vcl/vclevent.hxx>

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;

// VCLXAccessibleButton

void VCLXAccessibleButton::ProcessWindowEvent( const VclWindowEvent& rVclWindowEvent )

{

    switch ( rVclWindowEvent.GetId() )

    {

        case VclEventId::PushbuttonToggle:

        {

            Any aOldValue;

            Any aNewValue;

            VclPtr< PushButton > pButton = GetAs< PushButton >();

            if ( pButton && pButton->GetState() == TRISTATE_TRUE )

                aNewValue <<= AccessibleStateType::CHECKED;

            else

                aOldValue <<= AccessibleStateType::CHECKED;

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

        }

        break;

        default:

            VCLXAccessibleTextComponent::ProcessWindowEvent( rVclWindowEvent );

   }

}

void VCLXAccessibleButton::FillAccessibleStateSet( sal_Int64& rStateSet )

{

    VCLXAccessibleTextComponent::FillAccessibleStateSet( rStateSet );

    VclPtr< PushButton > pButton = GetAs< PushButton >();

    if ( !pButton )

        return;

    rStateSet |= AccessibleStateType::FOCUSABLE;

    if (pButton->isToggleButton())

        rStateSet |= AccessibleStateType::CHECKABLE;

    if ( pButton->GetState() == TRISTATE_TRUE )

        rStateSet |= AccessibleStateType::CHECKED;

    if ( pButton->IsPressed() )

        rStateSet |= AccessibleStateType::PRESSED;

    // IA2 CWS: if the button has a popup menu, it should has the state EXPANDABLE

    if( pButton->GetType() == WindowType::MENUBUTTON )

    {

        rStateSet |= AccessibleStateType::EXPANDABLE;

    }

    if( pButton->GetStyle() & WB_DEFBUTTON )

    {

        rStateSet |= AccessibleStateType::DEFAULT;

    }

}

// XServiceInfo

OUString VCLXAccessibleButton::getImplementationName()

{

    return u"com.sun.star.comp.toolkit.AccessibleButton"_ustr;

}

Sequence< OUString > VCLXAccessibleButton::getSupportedServiceNames()

{

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

}

// XAccessibleContext

OUString VCLXAccessibleButton::getAccessibleName(  )

{

    OUString aName( VCLXAccessibleTextComponent::getAccessibleName() );

    sal_Int32 nLength = aName.getLength();

    if ( nLength >= 3 && aName.match( "...", nLength - 3 ) )

    {

        if ( nLength == 3 )

        {

            // it's a browse button

            aName = VclResId( RID_STR_ACC_NAME_BROWSEBUTTON );

        }

        else

        {

            // remove the three trailing dots

            aName = aName.copy( 0, nLength - 3 );

        }

    }

    else if ( nLength >= 3 && aName.match( "<< ", 0 ) )

    {

        // remove the leading symbols

        aName = aName.copy( 3, nLength - 3 );

    }

    else if ( nLength >= 3 && aName.match( " >>", nLength - 3 ) )

    {

        // remove the trailing symbols

        aName = aName.copy( 0, nLength - 3 );

    }

    return aName;

}

// XAccessibleAction

sal_Int32 VCLXAccessibleButton::getAccessibleActionCount( )

{

    OExternalLockGuard aGuard( this );

    return 1;

}

sal_Bool VCLXAccessibleButton::doAccessibleAction ( sal_Int32 nIndex )

{

    OExternalLockGuard aGuard( this );

    if ( nIndex != 0 )

        throw IndexOutOfBoundsException();

    VclPtr< PushButton > pButton = GetAs< PushButton >();

    if ( pButton )

    {

        if (pButton->isToggleButton())

        {

            // PushButton::Click doesn't toggle when it's a toggle button

            pButton->Check(!pButton->IsChecked());

            pButton->Toggle();

        }

        else

        {

            pButton->Click();

        }

    }

    return true;

}

OUString VCLXAccessibleButton::getAccessibleActionDescription ( sal_Int32 nIndex )

{

    OExternalLockGuard aGuard( this );

    if ( nIndex != 0 )

        throw IndexOutOfBoundsException();

    return RID_STR_ACC_ACTION_CLICK;

}

Reference< XAccessibleKeyBinding > VCLXAccessibleButton::getAccessibleActionKeyBinding( sal_Int32 nIndex )

{

    OExternalLockGuard aGuard( this );

    if ( nIndex != 0 )

        throw IndexOutOfBoundsException();

    rtl::Reference<OAccessibleKeyBindingHelper> pKeyBindingHelper = new OAccessibleKeyBindingHelper();

    VclPtr<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 pKeyBindingHelper;

}

// XAccessibleValue

Any VCLXAccessibleButton::getCurrentValue(  )

{

    OExternalLockGuard aGuard( this );

    Any aValue;

    VclPtr< PushButton > pButton = GetAs< PushButton >();

    if ( pButton )

        aValue <<= static_cast<sal_Int32>(pButton->IsPressed());

    return aValue;

}

sal_Bool VCLXAccessibleButton::setCurrentValue( const Any& aNumber )

{

    OExternalLockGuard aGuard( this );

    bool bReturn = false;

    VclPtr< PushButton > pButton = GetAs< PushButton >();

    if ( pButton )

    {

        sal_Int32 nValue = 0;

        OSL_VERIFY( aNumber >>= nValue );

        if ( nValue < 0 )

            nValue = 0;

        else if ( nValue > 1 )

            nValue = 1;

        pButton->SetPressed( nValue == 1 );

        bReturn = true;

    }

    return bReturn;

}

Any VCLXAccessibleButton::getMaximumValue(  )

{

    OExternalLockGuard aGuard( this );

    Any aValue;

    aValue <<= sal_Int32(1);

    return aValue;

}

Any VCLXAccessibleButton::getMinimumValue(  )

{

    OExternalLockGuard aGuard( this );

    Any aValue;

    aValue <<= sal_Int32(0);

    return aValue;

}

Any VCLXAccessibleButton::getMinimumIncrement(  )

{

    OExternalLockGuard aGuard( this );

    Any aValue;

    aValue <<= sal_Int32(1);

    return aValue;

}

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