/**************************************************************
 *
 * 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
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
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 *************************************************************/


// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_sc.hxx"
#include "scitems.hxx"
#include <editeng/eeitem.hxx>
#include <tools/gen.hxx>
#include "AccessibleText.hxx"
#include "editsrc.hxx"
#include <svx/AccessibleTextHelper.hxx>
#include "AccessiblePreviewHeaderCell.hxx"
#include "AccessibilityHints.hxx"
#include "prevwsh.hxx"
#include "unoguard.hxx"
#include "miscuno.hxx"
#include "prevloc.hxx"
#include "scresid.hxx"
#ifndef SC_SC_HRC
#include "sc.hrc"
#endif

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

#include <vcl/window.hxx>
#include <svl/smplhint.hxx>
#include <unotools/accessiblestatesethelper.hxx>
#include <comphelper/sequence.hxx>
#include <toolkit/helper/convert.hxx>

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

//=====  internal  ============================================================

ScAccessiblePreviewHeaderCell::ScAccessiblePreviewHeaderCell( const ::com::sun::star::uno::Reference<
						        ::com::sun::star::accessibility::XAccessible>& rxParent,
							ScPreviewShell* pViewShell,
							const ScAddress& rCellPos, sal_Bool bIsColHdr, sal_Bool bIsRowHdr,
							sal_Int32 nIndex ) :
	ScAccessibleContextBase( rxParent, AccessibleRole::TABLE_CELL ),
	mpViewShell( pViewShell ),
    mpTextHelper( NULL ),
	mnIndex( nIndex ),
	maCellPos( rCellPos ),
	mbColumnHeader( bIsColHdr ),
	mbRowHeader( bIsRowHdr ),
    mpTableInfo( NULL )
{
	if (mpViewShell)
		mpViewShell->AddAccessibilityObject(*this);
}

ScAccessiblePreviewHeaderCell::~ScAccessiblePreviewHeaderCell()
{
	if (mpViewShell)
		mpViewShell->RemoveAccessibilityObject(*this);
}

void SAL_CALL ScAccessiblePreviewHeaderCell::disposing()
{
    ScUnoGuard aGuard;
	if (mpViewShell)
	{
		mpViewShell->RemoveAccessibilityObject(*this);
		mpViewShell = NULL;
	}

   	if (mpTableInfo)
		DELETEZ (mpTableInfo);

	ScAccessibleContextBase::disposing();
}

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

void ScAccessiblePreviewHeaderCell::Notify( SfxBroadcaster& rBC, const SfxHint& rHint )
{
	if (rHint.ISA( SfxSimpleHint ))
	{
		const SfxSimpleHint& rRef = (const SfxSimpleHint&)rHint;
		sal_uLong nId = rRef.GetId();
        if (nId == SC_HINT_ACC_VISAREACHANGED)
        {
            if (mpTextHelper)
                mpTextHelper->UpdateChildren();
        }
		else if ( nId == SFX_HINT_DATACHANGED )
		{
			//	column / row layout may change with any document change,
			//	so it must be invalidated
			DELETEZ( mpTableInfo );
		}
	}

	ScAccessibleContextBase::Notify(rBC, rHint);
}

//=====  XInterface  =====================================================

uno::Any SAL_CALL ScAccessiblePreviewHeaderCell::queryInterface( uno::Type const & rType )
	throw (uno::RuntimeException)
{
	uno::Any aAny (ScAccessiblePreviewHeaderCellImpl::queryInterface(rType));
	return aAny.hasValue() ? aAny : ScAccessibleContextBase::queryInterface(rType);
}

void SAL_CALL ScAccessiblePreviewHeaderCell::acquire()
	throw ()
{
	ScAccessibleContextBase::acquire();
}

void SAL_CALL ScAccessiblePreviewHeaderCell::release()
	throw ()
{
	ScAccessibleContextBase::release();
}

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

uno::Any SAL_CALL ScAccessiblePreviewHeaderCell::getCurrentValue() throw (uno::RuntimeException)
{
 	ScUnoGuard aGuard;
    IsObjectValid();

	double fValue(0.0);
    if (mbColumnHeader)
        fValue = maCellPos.Col();
    else
        fValue = maCellPos.Row();

    uno::Any aAny;
    aAny <<= fValue;
	return aAny;
}

sal_Bool SAL_CALL ScAccessiblePreviewHeaderCell::setCurrentValue( const uno::Any& /* aNumber */ )
								    							throw (uno::RuntimeException)
{
	//	it is not possible to set a value
	return sal_False;
}

uno::Any SAL_CALL ScAccessiblePreviewHeaderCell::getMaximumValue() throw (uno::RuntimeException)
{
 	ScUnoGuard aGuard;
    IsObjectValid();

	double fValue(0.0);
    if (mbColumnHeader)
        fValue = MAXCOL;
    else
        fValue = MAXROW;
    uno::Any aAny;
    aAny <<= fValue;
	return aAny;
}

uno::Any SAL_CALL ScAccessiblePreviewHeaderCell::getMinimumValue() throw (uno::RuntimeException)
{
	double fValue(0.0);
    uno::Any aAny;
    aAny <<= fValue;
	return aAny;
}

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

uno::Reference< XAccessible > SAL_CALL ScAccessiblePreviewHeaderCell::getAccessibleAtPoint( const awt::Point& rPoint )
								throw (uno::RuntimeException)
{
    uno::Reference<XAccessible> xRet;
    if (containsPoint(rPoint))
    {
 	    ScUnoGuard aGuard;
        IsObjectValid();

    	if(!mpTextHelper)
	    	CreateTextHelper();

        xRet = mpTextHelper->GetAt(rPoint);
    }

    return xRet;
}

void SAL_CALL ScAccessiblePreviewHeaderCell::grabFocus() throw (uno::RuntimeException)
{
 	ScUnoGuard aGuard;
    IsObjectValid();
	if (getAccessibleParent().is())
	{
		uno::Reference<XAccessibleComponent> xAccessibleComponent(getAccessibleParent()->getAccessibleContext(), uno::UNO_QUERY);
		if (xAccessibleComponent.is())
			xAccessibleComponent->grabFocus();
	}
}

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

sal_Int32 SAL_CALL ScAccessiblePreviewHeaderCell::getAccessibleChildCount() throw(uno::RuntimeException)
{
	ScUnoGuard aGuard;
    IsObjectValid();
	if (!mpTextHelper)
		CreateTextHelper();
	return mpTextHelper->GetChildCount();
}

uno::Reference< XAccessible > SAL_CALL ScAccessiblePreviewHeaderCell::getAccessibleChild(sal_Int32 nIndex)
					        throw (uno::RuntimeException, lang::IndexOutOfBoundsException)
{
	ScUnoGuard aGuard;
    IsObjectValid();
	if (!mpTextHelper)
		CreateTextHelper();
	return mpTextHelper->GetChild(nIndex);
}

sal_Int32 SAL_CALL ScAccessiblePreviewHeaderCell::getAccessibleIndexInParent() throw (uno::RuntimeException)
{
	return mnIndex;
}

uno::Reference<XAccessibleStateSet> SAL_CALL ScAccessiblePreviewHeaderCell::getAccessibleStateSet()
						    throw(uno::RuntimeException)
{
	ScUnoGuard aGuard;

	uno::Reference<XAccessibleStateSet> xParentStates;
	if (getAccessibleParent().is())
	{
		uno::Reference<XAccessibleContext> xParentContext = getAccessibleParent()->getAccessibleContext();
		xParentStates = xParentContext->getAccessibleStateSet();
	}
	utl::AccessibleStateSetHelper* pStateSet = new utl::AccessibleStateSetHelper();
	if (IsDefunc(xParentStates))
		pStateSet->AddState(AccessibleStateType::DEFUNC);
    else
    {
	    pStateSet->AddState(AccessibleStateType::ENABLED);
	    pStateSet->AddState(AccessibleStateType::MULTI_LINE);
	    if (isShowing())
		    pStateSet->AddState(AccessibleStateType::SHOWING);
	    pStateSet->AddState(AccessibleStateType::TRANSIENT);
	    if (isVisible())
		    pStateSet->AddState(AccessibleStateType::VISIBLE);
    }
	return pStateSet;
}

//=====  XServiceInfo  ====================================================

rtl::OUString SAL_CALL ScAccessiblePreviewHeaderCell::getImplementationName() throw(uno::RuntimeException)
{
	return rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("ScAccessiblePreviewHeaderCell"));
}

uno::Sequence<rtl::OUString> SAL_CALL ScAccessiblePreviewHeaderCell::getSupportedServiceNames()
													throw(uno::RuntimeException)
{
	uno::Sequence< ::rtl::OUString > aSequence = ScAccessibleContextBase::getSupportedServiceNames();
    sal_Int32 nOldSize(aSequence.getLength());
    aSequence.realloc(nOldSize + 1);
    ::rtl::OUString* pNames = aSequence.getArray();

	pNames[nOldSize] = rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("com.sun.star.table.AccessibleCellView"));

	return aSequence;
}

//=====  XTypeProvider  =======================================================

uno::Sequence< uno::Type > SAL_CALL ScAccessiblePreviewHeaderCell::getTypes()
		throw (uno::RuntimeException)
{
	return comphelper::concatSequences(ScAccessiblePreviewHeaderCellImpl::getTypes(), ScAccessibleContextBase::getTypes());
}

uno::Sequence<sal_Int8> SAL_CALL
	ScAccessiblePreviewHeaderCell::getImplementationId(void)
    throw (uno::RuntimeException)
{
    ScUnoGuard aGuard;
    IsObjectValid();
	static uno::Sequence<sal_Int8> aId;
	if (aId.getLength() == 0)
	{
		aId.realloc (16);
		rtl_createUuid (reinterpret_cast<sal_uInt8 *>(aId.getArray()), 0, sal_True);
	}
	return aId;
}

//====  internal  =========================================================

Rectangle ScAccessiblePreviewHeaderCell::GetBoundingBoxOnScreen() const throw (uno::RuntimeException)
{
    Rectangle aCellRect;

	FillTableInfo();

    if (mpTableInfo)
    {
    	const ScPreviewColRowInfo& rColInfo = mpTableInfo->GetColInfo()[maCellPos.Col()];
	    const ScPreviewColRowInfo& rRowInfo = mpTableInfo->GetRowInfo()[maCellPos.Row()];

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

	if (mpViewShell)
	{
		Window* pWindow = mpViewShell->GetWindow();
		if (pWindow)
		{
			Rectangle aRect = pWindow->GetWindowExtentsRelative(NULL);
			aCellRect.setX(aCellRect.getX() + aRect.getX());
			aCellRect.setY(aCellRect.getY() + aRect.getY());
		}
	}
	return aCellRect;
}

Rectangle ScAccessiblePreviewHeaderCell::GetBoundingBox() const throw (uno::RuntimeException)
{
	FillTableInfo();

    if (mpTableInfo)
    {
    	const ScPreviewColRowInfo& rColInfo = mpTableInfo->GetColInfo()[maCellPos.Col()];
	    const ScPreviewColRowInfo& rRowInfo = mpTableInfo->GetRowInfo()[maCellPos.Row()];

        Rectangle aCellRect( rColInfo.nPixelStart, rRowInfo.nPixelStart, rColInfo.nPixelEnd, rRowInfo.nPixelEnd );
        uno::Reference<XAccessible> xAccParent = const_cast<ScAccessiblePreviewHeaderCell*>(this)->getAccessibleParent();
        if (xAccParent.is())
        {
            uno::Reference<XAccessibleContext> xAccParentContext = xAccParent->getAccessibleContext();
            uno::Reference<XAccessibleComponent> xAccParentComp (xAccParentContext, uno::UNO_QUERY);
            if (xAccParentComp.is())
            {
                Rectangle aParentRect (VCLRectangle(xAccParentComp->getBounds()));
	            aCellRect.setX(aCellRect.getX() - aParentRect.getX());
	            aCellRect.setY(aCellRect.getY() - aParentRect.getY());
            }
        }
    	return aCellRect;
    }
    return Rectangle();
}

rtl::OUString SAL_CALL ScAccessiblePreviewHeaderCell::createAccessibleDescription() throw(uno::RuntimeException)
{
    rtl::OUString sDescription = String(ScResId(STR_ACC_HEADERCELL_DESCR));
    return sDescription;
}

rtl::OUString SAL_CALL ScAccessiblePreviewHeaderCell::createAccessibleName() throw(uno::RuntimeException)
{
	rtl::OUString sName = String(ScResId(STR_ACC_HEADERCELL_NAME));

	if ( mbColumnHeader )
	{
		if ( mbRowHeader )
		{
			//!	name for corner cell?

//			sName = rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("Column/Row Header"));
		}
		else
		{
			// name of column header
			sName += ScColToAlpha( maCellPos.Col() );
		}
	}
	else
	{
		// name of row header
		sName += rtl::OUString::valueOf( (sal_Int32) ( maCellPos.Row() + 1 ) );
	}

	return sName;
}

sal_Bool ScAccessiblePreviewHeaderCell::IsDefunc( const uno::Reference<XAccessibleStateSet>& rxParentStates )
{
	return ScAccessibleContextBase::IsDefunc() || (mpViewShell == NULL) || !getAccessibleParent().is() ||
		(rxParentStates.is() && rxParentStates->contains(AccessibleStateType::DEFUNC));
}

void ScAccessiblePreviewHeaderCell::CreateTextHelper()
{
	if (!mpTextHelper)
	{
		::std::auto_ptr < ScAccessibleTextData > pAccessiblePreviewHeaderCellTextData
			(new ScAccessiblePreviewHeaderCellTextData(mpViewShell, String(getAccessibleName()), maCellPos, mbColumnHeader, mbRowHeader));
		::std::auto_ptr< SvxEditSource > pEditSource (new ScAccessibilityEditSource(pAccessiblePreviewHeaderCellTextData));

		mpTextHelper = new ::accessibility::AccessibleTextHelper(pEditSource );
        mpTextHelper->SetEventSource(this);
	}
}

void ScAccessiblePreviewHeaderCell::FillTableInfo() const
{
	if ( mpViewShell && !mpTableInfo )
	{
		Size aOutputSize;
		Window* pWindow = mpViewShell->GetWindow();
		if ( pWindow )
			aOutputSize = pWindow->GetOutputSizePixel();
        Point aPoint;
		Rectangle aVisRect( aPoint, aOutputSize );

		mpTableInfo = new ScPreviewTableInfo;
		mpViewShell->GetLocationData().GetTableInfo( aVisRect, *mpTableInfo );
	}
}