/* -*- 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 <com/sun/star/accessibility/AccessibleRole.hpp>

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

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

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

#include <toolkit/helper/vclunohelper.hxx>

#include <utility>

#include <vcl/svapp.hxx>

#include <vcl/settings.hxx>

#include <vcl/unohelp.hxx>

#include <osl/mutex.hxx>

#include <tools/debug.hxx>

#include <tools/gen.hxx>

#include <svx/dlgctrl.hxx>

#include <svxpixelctlaccessiblecontext.hxx>

using namespace ::cppu;

using namespace ::osl;

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

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

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

SvxPixelCtlAccessible::SvxPixelCtlAccessible(SvxPixelCtl* pControl)

    : mpPixelCtl(pControl)

{

}

SvxPixelCtlAccessible::~SvxPixelCtlAccessible()

{

    ensureDisposed();

}

sal_Int64 SvxPixelCtlAccessible::getAccessibleChildCount(  )

{

    return SvxPixelCtl::GetSquares();

}

uno::Reference< XAccessible > SvxPixelCtlAccessible::getAccessibleChild( sal_Int64 i )

{

    ::osl::MutexGuard   aGuard( m_aMutex );

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

        throw lang::IndexOutOfBoundsException();

    if (!mpPixelCtl)

        return nullptr;

    rtl::Reference< SvxPixelCtlAccessibleChild > xChild = CreateChild(i, mpPixelCtl->IndexToPoint(i));

    return xChild;

}

uno::Reference< XAccessible > SvxPixelCtlAccessible::getAccessibleParent(  )

{

    ::osl::MutexGuard   aGuard( m_aMutex );

    if (mpPixelCtl)

        return mpPixelCtl->getAccessibleParent();

    return uno::Reference<css::accessibility::XAccessible>();

}

sal_Int16 SvxPixelCtlAccessible::getAccessibleRole(  )

{

    return AccessibleRole::LIST;

}

OUString SvxPixelCtlAccessible::getAccessibleDescription(  )

{

    ::osl::MutexGuard   aGuard( m_aMutex );

    return mpPixelCtl ? mpPixelCtl->GetAccessibleDescription() : u""_ustr;

}

OUString SvxPixelCtlAccessible::getAccessibleName(  )

{

    ::osl::MutexGuard   aGuard( m_aMutex );

    return mpPixelCtl ? mpPixelCtl->GetAccessibleName() : u""_ustr;

}

Reference< XAccessibleRelationSet > SAL_CALL SvxPixelCtlAccessible::getAccessibleRelationSet()

{

    if (mpPixelCtl)

        return mpPixelCtl->get_accessible_relation_set();

    return uno::Reference<css::accessibility::XAccessibleRelationSet>();

}

sal_Int64 SvxPixelCtlAccessible::getAccessibleStateSet(  )

{

    ::osl::MutexGuard   aGuard( m_aMutex );

    sal_Int64 nStateSet = 0;

    if (mpPixelCtl)

    {

        nStateSet |=

            AccessibleStateType::FOCUSABLE |

            AccessibleStateType::SELECTABLE |

            AccessibleStateType::SHOWING |

            AccessibleStateType::VISIBLE |

            AccessibleStateType::OPAQUE;

        if (mpPixelCtl->IsEnabled())

            nStateSet |= AccessibleStateType::ENABLED;

        if (mpPixelCtl->HasFocus())

            nStateSet |= AccessibleStateType::FOCUSED;

        nStateSet |= AccessibleStateType::MANAGES_DESCENDANTS;

    }

    return nStateSet;

}

uno::Reference<XAccessible > SAL_CALL SvxPixelCtlAccessible::getAccessibleAtPoint (

        const awt::Point& rPoint)

{

    ::osl::MutexGuard   aGuard( m_aMutex );

    if (!mpPixelCtl)

        return nullptr;

    tools::Long nIndex = mpPixelCtl->PointToIndex(Point(rPoint.X, rPoint.Y));

    rtl::Reference< SvxPixelCtlAccessibleChild > xRet = CreateChild(nIndex, mpPixelCtl->IndexToPoint(nIndex));

    return xRet;

}

awt::Rectangle SvxPixelCtlAccessible::implGetBounds()

{

    ::osl::MutexGuard   aGuard( m_aMutex );

    awt::Rectangle aRet;

    if (mpPixelCtl)

    {

        const Point   aOutPos;

        Size          aOutSize(mpPixelCtl->GetOutputSizePixel());

        aRet.X = aOutPos.X();

        aRet.Y = aOutPos.Y();

        aRet.Width = aOutSize.Width();

        aRet.Height = aOutSize.Height();

    }

    return aRet;

}

void SvxPixelCtlAccessible::grabFocus(  )

{

    ::osl::MutexGuard   aGuard( m_aMutex );

    if (mpPixelCtl)

        mpPixelCtl->GrabFocus();

}

sal_Int32 SvxPixelCtlAccessible::getForeground(  )

{

    ::osl::MutexGuard   aGuard( m_aMutex );

    //see SvxPixelCtl::Paint

    const StyleSettings& rStyles = Application::GetSettings().GetStyleSettings();

    return sal_Int32(rStyles.GetLabelTextColor());

}

sal_Int32 SvxPixelCtlAccessible::getBackground(  )

{

    ::osl::MutexGuard   aGuard( m_aMutex );

    //see SvxPixelCtl::Paint

    const StyleSettings& rStyles = Application::GetSettings().GetStyleSettings();

    return sal_Int32(rStyles.GetDialogColor());

}

void SvxPixelCtlAccessible::implSelect(sal_Int64 nChildIndex, bool bSelect)

{

    ::osl::MutexGuard   aGuard( m_aMutex );

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

        throw lang::IndexOutOfBoundsException();

    if (!mpPixelCtl)

        return;

    tools::Long nIndex = mpPixelCtl->ShowPosition(mpPixelCtl->IndexToPoint(nChildIndex));

    NotifyChild(nIndex, bSelect, false);

}

bool SvxPixelCtlAccessible::implIsSelected(sal_Int64 nChildIndex)

{

    ::osl::MutexGuard   aGuard( m_aMutex );

    if (!mpPixelCtl)

        return false;

    return mpPixelCtl->GetFocusPosIndex() == nChildIndex;

}

void SAL_CALL SvxPixelCtlAccessible::disposing()

{

    ::osl::MutexGuard aGuard(m_aMutex);

    OAccessibleSelectionHelper::disposing();

    m_xCurChild.clear();

    mpPixelCtl = nullptr;

}

void SvxPixelCtlAccessible::NotifyChild(tools::Long nIndex,bool bSelect ,bool bCheck)

{

    DBG_ASSERT( !(!bSelect && !bCheck),"" );//non is false

    rtl::Reference<SvxPixelCtlAccessibleChild> pChild = m_xCurChild;

    if (pChild && pChild->getAccessibleIndexInParent() == nIndex )

    {

        if (bSelect)

        {

            pChild->SelectChild(true);

        }

        if (bCheck)

        {

            pChild->ChangePixelColorOrBG(mpPixelCtl->GetBitmapPixel(sal_uInt16(nIndex)) != 0);

            pChild->CheckChild();

        }

        return;

    }

    rtl::Reference<SvxPixelCtlAccessibleChild> xNewChild = CreateChild(nIndex, mpPixelCtl->IndexToPoint(nIndex));

    DBG_ASSERT(xNewChild,"Child Must be Valid");

    Any aNewValue,aOldValue;

    aNewValue <<= uno::Reference<XAccessible>(xNewChild);

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

    if (bSelect)

    {

        if (pChild)

        {

            pChild->SelectChild(false);

        }

        xNewChild->SelectChild(true);

    }

    if (bCheck)

    {

        xNewChild->CheckChild();

    }

    m_xCurChild = std::move(xNewChild);

}

rtl::Reference<SvxPixelCtlAccessibleChild> SvxPixelCtlAccessible::CreateChild (tools::Long nIndex,Point mPoint)

{

    bool bPixelColorOrBG = mpPixelCtl->GetBitmapPixel(sal_uInt16(nIndex)) != 0;

    Size size(mpPixelCtl->GetWidth() / SvxPixelCtl::GetLineCount(), mpPixelCtl->GetHeight() / SvxPixelCtl::GetLineCount());

    rtl::Reference<SvxPixelCtlAccessibleChild> xChild = new SvxPixelCtlAccessibleChild(*mpPixelCtl,

                bPixelColorOrBG,

                tools::Rectangle(mPoint,size),

                this,

                nIndex);

    return xChild;

}

void SvxPixelCtlAccessibleChild::CheckChild()

{

    Any aChecked;

    aChecked <<= AccessibleStateType::CHECKED;

    if (m_bPixelColorOrBG)//Current Child State

    {

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

    }

    else

    {

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

    }

}

void SvxPixelCtlAccessibleChild::SelectChild( bool bSelect)

{

    Any aSelected;

    aSelected <<= AccessibleStateType::SELECTED;

    if (bSelect)

    {

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

    }

    else

    {

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

    }

}

SvxPixelCtlAccessibleChild::SvxPixelCtlAccessibleChild( SvxPixelCtl& rWindow, bool bPixelColorOrBG,

    const tools::Rectangle& rBoundingBox, rtl::Reference<SvxPixelCtlAccessible> xParent,

    tools::Long nIndexInParent)

    : mrParentWindow( rWindow )

    , mxParent(std::move(xParent))

    , m_bPixelColorOrBG(bPixelColorOrBG)

    , maBoundingBox( rBoundingBox )

    , mnIndexInParent( nIndexInParent )

{

}

SvxPixelCtlAccessibleChild::~SvxPixelCtlAccessibleChild()

{

    ensureDisposed();

}

uno::Reference< XAccessible > SAL_CALL SvxPixelCtlAccessibleChild::getAccessibleAtPoint( const awt::Point& )

{

    return uno::Reference< XAccessible >();

}

void SAL_CALL SvxPixelCtlAccessibleChild::grabFocus()

{

}

sal_Int32 SvxPixelCtlAccessibleChild::getForeground()

{

    ::osl::MutexGuard   aGuard( m_aMutex );

    return mxParent.is() ? mxParent->getForeground() : -1;

}

sal_Int32 SvxPixelCtlAccessibleChild::getBackground()

{

    ::osl::MutexGuard   aGuard( m_aMutex );

    return mxParent.is() ? mxParent->getBackground() : -1;

}

// XAccessibleContext

sal_Int64 SAL_CALL SvxPixelCtlAccessibleChild::getAccessibleChildCount()

{

    return 0;

}

uno::Reference< XAccessible > SAL_CALL SvxPixelCtlAccessibleChild::getAccessibleChild( sal_Int64 )

{

    throw lang::IndexOutOfBoundsException();

}

uno::Reference< XAccessible > SAL_CALL SvxPixelCtlAccessibleChild::getAccessibleParent()

{

    return mxParent;

}

sal_Int16 SAL_CALL SvxPixelCtlAccessibleChild::getAccessibleRole()

{

    return AccessibleRole::CHECK_BOX;

}

OUString SAL_CALL SvxPixelCtlAccessibleChild::getAccessibleDescription()

{

    ::osl::MutexGuard   aGuard( m_aMutex );

    return  GetName();

}

OUString SAL_CALL SvxPixelCtlAccessibleChild::getAccessibleName()

{

    ::osl::MutexGuard   aGuard( m_aMutex );

    return  GetName();

}

/** Return empty uno::Reference to indicate that the relation set is not

    supported.

*/

uno::Reference<XAccessibleRelationSet> SAL_CALL SvxPixelCtlAccessibleChild::getAccessibleRelationSet()

{

    return uno::Reference< XAccessibleRelationSet >();

}

sal_Int64 SAL_CALL SvxPixelCtlAccessibleChild::getAccessibleStateSet()

{

    ::osl::MutexGuard                       aGuard( m_aMutex );

    sal_Int64 nStateSet = 0;

    if (!rBHelper.bDisposed)

    {

        nStateSet |= AccessibleStateType::TRANSIENT;

        nStateSet |= AccessibleStateType::ENABLED;

        nStateSet |= AccessibleStateType::OPAQUE;

        nStateSet |= AccessibleStateType::SELECTABLE;

        nStateSet |= AccessibleStateType::SHOWING;

        nStateSet |= AccessibleStateType::VISIBLE;

        tools::Long nIndex = mrParentWindow.GetFocusPosIndex();

        if ( nIndex == mnIndexInParent)

        {

            nStateSet |= AccessibleStateType::SELECTED;

        }

        if (mrParentWindow.GetBitmapPixel(sal_uInt16(mnIndexInParent)))

        {

            nStateSet |= AccessibleStateType::CHECKED;

        }

    }

    else

        nStateSet |= AccessibleStateType::DEFUNC;

    return nStateSet;

}

void SAL_CALL SvxPixelCtlAccessibleChild::disposing()

{

    OAccessible::disposing();

    mxParent.clear();

}

awt::Rectangle SvxPixelCtlAccessibleChild::implGetBounds()

{

    // no guard necessary, because no one changes maBoundingBox after creating it

    return vcl::unohelper::ConvertToAWTRect(maBoundingBox);

}

OUString SvxPixelCtlAccessibleChild::GetName() const

{

    sal_Int32 nXIndex = mnIndexInParent % SvxPixelCtl::GetLineCount();

    sal_Int32 nYIndex = mnIndexInParent / SvxPixelCtl::GetLineCount();

    OUString str = "("

                 + OUString::number(nXIndex)

                 + ","

                 + OUString::number(nYIndex)

                 + ")";

    return str;

}

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