/* -*- 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 <sal/config.h>

#include <tools/gen.hxx>

#include <AccessibleText.hxx>

#include <editsrc.hxx>

#include <svx/AccessibleTextHelper.hxx>

#include <AccessiblePreviewHeaderCell.hxx>

#include <prevwsh.hxx>

#include <prevloc.hxx>

#include <strings.hxx>

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

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

#include <comphelper/sequence.hxx>

#include <vcl/window.hxx>

#include <vcl/svapp.hxx>

#include <vcl/unohelp.hxx>

#include <svl/hint.hxx>

#include <toolkit/helper/vclunohelper.hxx>

#ifdef indices

#undef indices

#endif

#ifdef extents

#undef extents

#endif

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

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

ScAccessiblePreviewHeaderCell::ScAccessiblePreviewHeaderCell(

    const css::uno::Reference<css::accessibility::XAccessible>& rxParent,

    ScPreviewShell* pViewShell, const ScAddress& rCellPos, bool bIsColHdr, bool bIsRowHdr,

    sal_Int32 nIndex)

    : ImplInheritanceHelper(rxParent, AccessibleRole::TABLE_CELL)

    , mpViewShell(pViewShell)

    , mnIndex(nIndex)

    , maCellPos(rCellPos)

    , mbColumnHeader(bIsColHdr)

    , mbRowHeader(bIsRowHdr)

{

    if (mpViewShell)

        mpViewShell->AddAccessibilityObject(*this);

}

ScAccessiblePreviewHeaderCell::~ScAccessiblePreviewHeaderCell()

{

    if (mpViewShell)

        mpViewShell->RemoveAccessibilityObject(*this);

}

void SAL_CALL ScAccessiblePreviewHeaderCell::disposing()

{

    SolarMutexGuard aGuard;

    if (mpViewShell)

    {

        mpViewShell->RemoveAccessibilityObject(*this);

        mpViewShell = nullptr;

    }

    mpTableInfo.reset();

    ScAccessibleContextBase::disposing();

}

//=====  SfxListener  =====================================================

void ScAccessiblePreviewHeaderCell::Notify( SfxBroadcaster& rBC, const SfxHint& rHint )

{

    const SfxHintId nId = rHint.GetId();

    if (nId == SfxHintId::ScAccVisAreaChanged)

    {

        if (mxTextHelper)

            mxTextHelper->UpdateChildren();

    }

    else if ( nId == SfxHintId::DataChanged )

    {

        //  column / row layout may change with any document change,

        //  so it must be invalidated

        mpTableInfo.reset();

    }

    ScAccessibleContextBase::Notify(rBC, rHint);

}

//=====  XAccessibleValue  ================================================

uno::Any SAL_CALL ScAccessiblePreviewHeaderCell::getCurrentValue()

{

    SolarMutexGuard aGuard;

    ensureAlive();

    double fValue(0.0);

    if (mbColumnHeader)

        fValue = maCellPos.Col();

    else

        fValue = maCellPos.Row();

    return uno::Any(fValue);

}

sal_Bool SAL_CALL ScAccessiblePreviewHeaderCell::setCurrentValue( const uno::Any& /* aNumber */ )

{

    //  it is not possible to set a value

    return false;

}

uno::Any SAL_CALL ScAccessiblePreviewHeaderCell::getMaximumValue()

{

    SolarMutexGuard aGuard;

    ensureAlive();

    double fValue(0.0);

    ScDocument& rDoc = mpViewShell->GetDocument();

    if (mbColumnHeader)

        fValue = rDoc.MaxCol();

    else

        fValue = rDoc.MaxRow();

    return uno::Any(fValue);

}

uno::Any SAL_CALL ScAccessiblePreviewHeaderCell::getMinimumValue()

{

    return uno::Any(0.0);

}

uno::Any SAL_CALL ScAccessiblePreviewHeaderCell::getMinimumIncrement()

{

    // value can't be changed, s. 'setCurrentValue'

    return uno::Any();

}

//=====  XAccessibleComponent  ============================================

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

{

    rtl::Reference<comphelper::OAccessible> pRet;

    if (containsPoint(rPoint))

    {

        SolarMutexGuard aGuard;

        ensureAlive();

        if(!mxTextHelper)

            CreateTextHelper();

        pRet = mxTextHelper->GetAt(rPoint);

    }

    return pRet;

}

void SAL_CALL ScAccessiblePreviewHeaderCell::grabFocus()

{

    SolarMutexGuard aGuard;

    ensureAlive();

    if (getAccessibleParent().is())

    {

        uno::Reference<XAccessibleComponent> xAccessibleComponent(getAccessibleParent()->getAccessibleContext(), uno::UNO_QUERY);

        if (xAccessibleComponent.is())

            xAccessibleComponent->grabFocus();

    }

}

//=====  XAccessibleContext  ==============================================

sal_Int64 SAL_CALL ScAccessiblePreviewHeaderCell::getAccessibleChildCount()

{

    SolarMutexGuard aGuard;

    ensureAlive();

    if (!mxTextHelper)

        CreateTextHelper();

    return mxTextHelper->GetChildCount();

}

uno::Reference< XAccessible > SAL_CALL ScAccessiblePreviewHeaderCell::getAccessibleChild(sal_Int64 nIndex)

{

    SolarMutexGuard aGuard;

    ensureAlive();

    if (!mxTextHelper)

        CreateTextHelper();

    return mxTextHelper->GetChild(nIndex);

}

sal_Int64 SAL_CALL ScAccessiblePreviewHeaderCell::getAccessibleIndexInParent()

{

    return mnIndex;

}

sal_Int64 SAL_CALL ScAccessiblePreviewHeaderCell::getAccessibleStateSet()

{

    SolarMutexGuard aGuard;

    sal_Int64 nParentStates = 0;

    if (getAccessibleParent().is())

    {

        uno::Reference<XAccessibleContext> xParentContext = getAccessibleParent()->getAccessibleContext();

        nParentStates = xParentContext->getAccessibleStateSet();

    }

    sal_Int64 nStateSet = 0;

    if (IsDefunc(nParentStates))

        nStateSet |= AccessibleStateType::DEFUNC;

    else

    {

        nStateSet |= AccessibleStateType::ENABLED;

        nStateSet |= AccessibleStateType::MULTI_LINE;

        if (isShowing())

            nStateSet |= AccessibleStateType::SHOWING;

        nStateSet |= AccessibleStateType::TRANSIENT;

        if (isVisible())

            nStateSet |= AccessibleStateType::VISIBLE;

    }

    return nStateSet;

}

AbsoluteScreenPixelRectangle ScAccessiblePreviewHeaderCell::GetBoundingBoxOnScreen()

{

    tools::Rectangle aCellRect;

    FillTableInfo();

    if (mpTableInfo)

    {

        const ScPreviewColRowInfo& rColInfo = mpTableInfo->GetColInfo()[maCellPos.Col()];

        const ScPreviewColRowInfo& rRowInfo = mpTableInfo->GetRowInfo()[maCellPos.Row()];

        aCellRect = tools::Rectangle( rColInfo.nPixelStart, rRowInfo.nPixelStart, rColInfo.nPixelEnd, rRowInfo.nPixelEnd );

    }

    if (mpViewShell)

    {

        vcl::Window* pWindow = mpViewShell->GetWindow();

        if (pWindow)

        {

            AbsoluteScreenPixelRectangle aRect = pWindow->GetWindowExtentsAbsolute();

            aCellRect.Move(aRect.Left(), aRect.Top());

        }

    }

    return AbsoluteScreenPixelRectangle(aCellRect);

}

tools::Rectangle ScAccessiblePreviewHeaderCell::GetBoundingBox()

{

    FillTableInfo();

    if (mpTableInfo)

    {

        const ScPreviewColRowInfo& rColInfo = mpTableInfo->GetColInfo()[maCellPos.Col()];

        const ScPreviewColRowInfo& rRowInfo = mpTableInfo->GetRowInfo()[maCellPos.Row()];

        tools::Rectangle aCellRect( rColInfo.nPixelStart, rRowInfo.nPixelStart, rColInfo.nPixelEnd, rRowInfo.nPixelEnd );

        uno::Reference<XAccessible> xAccParent = getAccessibleParent();

        if (xAccParent.is())

        {

            uno::Reference<XAccessibleContext> xAccParentContext = xAccParent->getAccessibleContext();

            uno::Reference<XAccessibleComponent> xAccParentComp (xAccParentContext, uno::UNO_QUERY);

            if (xAccParentComp.is())

            {

                tools::Rectangle aParentRect(

                    vcl::unohelper::ConvertToVCLRect(xAccParentComp->getBounds()));

                aCellRect.Move(-aParentRect.Left(), -aParentRect.Top());

            }

        }

        return aCellRect;

    }

    return tools::Rectangle();

}

OUString ScAccessiblePreviewHeaderCell::createAccessibleDescription()

{

    return STR_ACC_HEADERCELL_DESCR;

}

OUString ScAccessiblePreviewHeaderCell::createAccessibleName()

{

    OUString sName = STR_ACC_HEADERCELL_NAME;

    if ( mbColumnHeader )

    {

        if ( mbRowHeader )

        {

            //! name for corner cell?

//          sName = "Column/Row Header";

        }

        else

        {

            // name of column header

            sName += ScColToAlpha( maCellPos.Col() );

        }

    }

    else

    {

        // name of row header

        sName += OUString::number(  maCellPos.Row() + 1 );

    }

    return sName;

}

bool ScAccessiblePreviewHeaderCell::IsDefunc( sal_Int64 nParentStates )

{

    return ScAccessibleContextBase::IsDefunc() || (mpViewShell == nullptr) || !getAccessibleParent().is() ||

        (nParentStates & AccessibleStateType::DEFUNC);

}

void ScAccessiblePreviewHeaderCell::CreateTextHelper()

{

    if (!mxTextHelper)

    {

        mxTextHelper.reset( new ::accessibility::AccessibleTextHelper(

            std::make_unique<ScAccessibilityEditSource>(

                std::make_unique<ScAccessiblePreviewHeaderCellTextData>(

                    mpViewShell, getAccessibleName(), maCellPos,

                    mbColumnHeader, mbRowHeader))) );

        mxTextHelper->SetEventSource(this);

    }

}

void ScAccessiblePreviewHeaderCell::FillTableInfo() const

{

    if ( mpViewShell && !mpTableInfo )

    {

        Size aOutputSize;

        vcl::Window* pWindow = mpViewShell->GetWindow();

        if ( pWindow )

            aOutputSize = pWindow->GetOutputSizePixel();

        tools::Rectangle aVisRect( Point(), aOutputSize );

        mpTableInfo.reset( new ScPreviewTableInfo );

        mpViewShell->GetLocationData().GetTableInfo( aVisRect, *mpTableInfo );

    }

}

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