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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_sc.hxx"

#include "AccessiblePageHeader.hxx"
#include "AccessiblePageHeaderArea.hxx"
#include "AccessibilityHints.hxx"
#include "prevwsh.hxx"
#include "unoguard.hxx"
#include "miscuno.hxx"
#include "prevloc.hxx"
#include "document.hxx"
#include "stlpool.hxx"
#include "scitems.hxx"
#include "attrib.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 <com/sun/star/accessibility/AccessibleEventId.hpp>

#include <vcl/window.hxx>
#include <svl/smplhint.hxx>
#include <unotools/accessiblestatesethelper.hxx>
#include <svl/style.hxx>
#include <svl/itempool.hxx>
#include <editeng/editobj.hxx>
#include <toolkit/helper/convert.hxx>

#include <algorithm>

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

const sal_uInt8     MAX_AREAS = 3;

//=====  internal  ============================================================
struct Acquire
{
	void operator() (ScAccessiblePageHeaderArea* pArea)
	{
        if (pArea)
            pArea->acquire();
	}
};

struct Release
{
	void operator() (ScAccessiblePageHeaderArea*& pArea)
	{
        if (pArea)
            pArea->release();
	}
};

struct Dispose
{
	void operator() (ScAccessiblePageHeaderArea*& pArea)
	{
        if (pArea)
        {
            pArea->dispose();
            pArea->release();
        }
        pArea = NULL;
	}
};

ScAccessiblePageHeader::ScAccessiblePageHeader( const ::com::sun::star::uno::Reference<
						        ::com::sun::star::accessibility::XAccessible>& rxParent,
							ScPreviewShell* pViewShell, sal_Bool bHeader, sal_Int32 nIndex ) :
ScAccessibleContextBase( rxParent, bHeader ? AccessibleRole::HEADER : AccessibleRole::FOOTER ),
	mpViewShell( pViewShell ),
	mnIndex( nIndex ),
	mbHeader( bHeader ),
    maAreas(MAX_AREAS, NULL),
    mnChildCount(-1)
{
	if (mpViewShell)
		mpViewShell->AddAccessibilityObject(*this);
}

ScAccessiblePageHeader::~ScAccessiblePageHeader()
{
	if (!ScAccessibleContextBase::IsDefunc() && !rBHelper.bInDispose)
	{
		// increment refcount to prevent double call off dtor
		osl_incrementInterlockedCount( &m_refCount );
		dispose();
	}
}

void SAL_CALL ScAccessiblePageHeader::disposing()
{
    ScUnoGuard aGuard;
	if (mpViewShell)
	{
		mpViewShell->RemoveAccessibilityObject(*this);
		mpViewShell = NULL;
	}
    std::for_each(maAreas.begin(), maAreas.end(), Dispose());

	ScAccessibleContextBase::disposing();
}

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

void ScAccessiblePageHeader::Notify( SfxBroadcaster& rBC, const SfxHint& rHint )
{
	if (rHint.ISA( SfxSimpleHint ) )
	{
		const SfxSimpleHint& rRef = (const SfxSimpleHint&)rHint;
		// only notify if child exist, otherwise it is not necessary
		if ((rRef.GetId() == SC_HINT_DATACHANGED))
        {
            ScHFAreas aOldAreas(maAreas);
            std::for_each(aOldAreas.begin(), aOldAreas.end(), Acquire());
            mnChildCount = -1;
            getAccessibleChildCount();
            for (sal_uInt8 i = 0; i < MAX_AREAS; ++i)
            {
                if ((aOldAreas[i] && maAreas[i] && !ScGlobal::EETextObjEqual(aOldAreas[i]->GetEditTextObject(), maAreas[i]->GetEditTextObject())) ||
                    (aOldAreas[i] && !maAreas[i]) || (!aOldAreas[i] && maAreas[i]))
                {
                    if (aOldAreas[i] && aOldAreas[i]->GetEditTextObject())
                    {
			            AccessibleEventObject aEvent;
			            aEvent.EventId = AccessibleEventId::CHILD;
			            aEvent.Source = uno::Reference< XAccessibleContext >(this);
                        aEvent.OldValue = uno::makeAny(uno::Reference<XAccessible>(aOldAreas[i]));

			            CommitChange(aEvent); // child gone - event
                        aOldAreas[i]->dispose();
                    }
                    if (maAreas[i] && maAreas[i]->GetEditTextObject())
                    {
			            AccessibleEventObject aEvent;
			            aEvent.EventId = AccessibleEventId::CHILD;
			            aEvent.Source = uno::Reference< XAccessibleContext >(this);
                        aEvent.NewValue = uno::makeAny(uno::Reference<XAccessible>(maAreas[i]));

			            CommitChange(aEvent); // new child - event
                    }
                }
            }
            std::for_each(aOldAreas.begin(), aOldAreas.end(), Release());
        }
        else if (rRef.GetId() == SC_HINT_ACC_VISAREACHANGED)
        {
            AccessibleEventObject aEvent;
            aEvent.EventId = AccessibleEventId::VISIBLE_DATA_CHANGED;
			aEvent.Source = uno::Reference< XAccessibleContext >(this);
            CommitChange(aEvent);
        }
    }
    
	ScAccessibleContextBase::Notify(rBC, rHint);
}

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

uno::Reference< XAccessible > SAL_CALL ScAccessiblePageHeader::getAccessibleAtPoint( const awt::Point& aPoint )
    							throw (uno::RuntimeException)
{
	uno::Reference<XAccessible> xRet;

    if (containsPoint(aPoint))
    {
    	ScUnoGuard aGuard;
        IsObjectValid();

        sal_Int32 nCount(getAccessibleChildCount()); // fill the areas

        if (nCount)
        {
            // return the first with content, because they have all the same Bounding Box
	        sal_uInt8 i(0);
            while(!xRet.is() && i < MAX_AREAS)
            {
                if (maAreas[i])
                    xRet = maAreas[i];
                else
                    ++i;
            }
        }
    }

	return xRet;
}

void SAL_CALL ScAccessiblePageHeader::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 ScAccessiblePageHeader::getAccessibleChildCount() throw (uno::RuntimeException)
{
	ScUnoGuard aGuard;
    IsObjectValid();

    if((mnChildCount < 0) && mpViewShell)
    {
        mnChildCount = 0;
        ScDocument* pDoc = mpViewShell->GetDocument();
        if (pDoc)
        {
        	// find out how many regions (left,center, right) are with content

            SfxStyleSheetBase* pStyle = pDoc->GetStyleSheetPool()->Find(pDoc->GetPageStyle(mpViewShell->GetLocationData().GetPrintTab()), SFX_STYLE_FAMILY_PAGE);
            if (pStyle)
            {
                sal_uInt16 nPageWhichId(0);
                if (mbHeader)
                    nPageWhichId = mpViewShell->GetLocationData().IsHeaderLeft() ? ATTR_PAGE_HEADERLEFT : ATTR_PAGE_HEADERRIGHT;
                else
                    nPageWhichId = mpViewShell->GetLocationData().IsFooterLeft() ? ATTR_PAGE_FOOTERLEFT : ATTR_PAGE_FOOTERRIGHT;
			    
			    const ScPageHFItem& rPageItem = static_cast<const ScPageHFItem&>(pStyle->GetItemSet().Get(nPageWhichId));
				AddChild(rPageItem.GetLeftArea(), 0, SVX_ADJUST_LEFT);
				AddChild(rPageItem.GetCenterArea(), 1, SVX_ADJUST_CENTER);
				AddChild(rPageItem.GetRightArea(), 2, SVX_ADJUST_RIGHT);
            }
        }
    }

	return mnChildCount;
}

uno::Reference< XAccessible > SAL_CALL ScAccessiblePageHeader::getAccessibleChild( sal_Int32 nIndex )
    							throw (lang::IndexOutOfBoundsException, uno::RuntimeException)
{
	ScUnoGuard aGuard;
    IsObjectValid();

	uno::Reference<XAccessible> xRet;

    if(mnChildCount < 0)
        getAccessibleChildCount();

    ScHFAreas::iterator aItr = maAreas.begin();
    ScHFAreas::iterator aEndItr = maAreas.end();
    while (!xRet.is() && (nIndex >= 0) && (aItr != aEndItr))
    {
        if (*aItr)
        {
            if (nIndex == 0)
                xRet = *aItr;
            else
                --nIndex;
        }
        else
            ++aItr;
    }

	if ( !xRet.is() )
		throw lang::IndexOutOfBoundsException();

	return xRet;
}

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

uno::Reference< XAccessibleStateSet > SAL_CALL ScAccessiblePageHeader::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::OPAQUE);
	    if (isShowing())
		    pStateSet->AddState(AccessibleStateType::SHOWING);
	    if (isVisible())
		    pStateSet->AddState(AccessibleStateType::VISIBLE);
    }
	return pStateSet;
}

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

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

uno::Sequence<rtl::OUString> SAL_CALL ScAccessiblePageHeader::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.text.AccessibleHeaderFooterView"));

	return aSequence;
}

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

::rtl::OUString SAL_CALL ScAccessiblePageHeader::createAccessibleDescription(void)
				    throw (uno::RuntimeException)
{
    String sDesc(ScResId(mbHeader ? STR_ACC_HEADER_DESCR : STR_ACC_FOOTER_DESCR));
    sDesc.SearchAndReplaceAscii("%1", String(ScResId(SCSTR_UNKNOWN)));
	return rtl::OUString( sDesc );
}

::rtl::OUString SAL_CALL ScAccessiblePageHeader::createAccessibleName(void)
				    throw (uno::RuntimeException)
{
    String sName(ScResId(mbHeader ? STR_ACC_HEADER_NAME : STR_ACC_FOOTER_NAME));
    sName.SearchAndReplaceAscii("%1", String(ScResId(SCSTR_UNKNOWN)));
	return rtl::OUString( sName );
}

Rectangle ScAccessiblePageHeader::GetBoundingBoxOnScreen() const throw (uno::RuntimeException)
{
	Rectangle aCellRect(GetBoundingBox());
	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 ScAccessiblePageHeader::GetBoundingBox() const throw (uno::RuntimeException)
{
	Rectangle aRect;
	if (mpViewShell)
	{
		const ScPreviewLocationData& rData = mpViewShell->GetLocationData();
		if ( mbHeader )
			rData.GetHeaderPosition( aRect );
		else
			rData.GetFooterPosition( aRect );

        // the Rectangle could contain negative coordinates so it should be cliped
        Rectangle aClipRect(Point(0, 0), aRect.GetSize());
		Window* pWindow = mpViewShell->GetWindow();
		if (pWindow)
			aClipRect = pWindow->GetWindowExtentsRelative(pWindow->GetAccessibleParentWindow());
        aRect = aClipRect.GetIntersection(aRect);
    }
    if (aRect.IsEmpty())
        aRect.SetSize(Size(-1, -1));
    
	return aRect;
}

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

void ScAccessiblePageHeader::AddChild(const EditTextObject* pArea, sal_uInt32 nIndex, SvxAdjust eAdjust)
{
    if (pArea && (pArea->GetText(0).Len() || (pArea->GetParagraphCount() > 1)))
    {
        if (maAreas[nIndex])
        {
            if (!ScGlobal::EETextObjEqual(maAreas[nIndex]->GetEditTextObject(), pArea))
            {
                maAreas[nIndex]->release();
                maAreas[nIndex] = new ScAccessiblePageHeaderArea(this, mpViewShell, pArea, mbHeader, eAdjust);
                maAreas[nIndex]->acquire();
            }
        }
        else
        {
            maAreas[nIndex] = new ScAccessiblePageHeaderArea(this, mpViewShell, pArea, mbHeader, eAdjust);
            maAreas[nIndex]->acquire();
        }
        ++mnChildCount;
    }
    else
    {
        if (maAreas[nIndex])
        {
            maAreas[nIndex]->release();
            maAreas[nIndex] = NULL;
        }
    }
}
