/*************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * Copyright 2000, 2010 Oracle and/or its affiliates.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * This file is part of OpenOffice.org.
 *
 * OpenOffice.org is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * OpenOffice.org is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
 * <http://www.openoffice.org/license.html>
 * for a copy of the LGPLv3 License.
 *
 ************************************************************************/

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

//#define _FUMORPH_PRIVATE
#include "fumorph.hxx"
#include <svx/xfillit.hxx>
#include <svx/xlineit.hxx>
#include <vcl/msgbox.hxx>
#include <svx/svdpool.hxx>
#include <tools/poly.hxx>
#include <svx/svdopath.hxx>
#include <svx/svdogrp.hxx>
#include <editeng/eeitem.hxx>

#include "View.hxx"
#include "ViewShell.hxx"
#include "Window.hxx"
#include <basegfx/polygon/b2dpolygontools.hxx>
#include <basegfx/polygon/b2dpolypolygontools.hxx>
#include <basegfx/matrix/b2dhommatrix.hxx>
#include <basegfx/matrix/b2dhommatrixtools.hxx>

#include "strings.hrc"
#include "sdresid.hxx"

#include "sdabstdlg.hxx"

// #i48168#
#include <svx/svditer.hxx>

#include <basegfx/color/bcolor.hxx>

namespace sd {

#define  ITEMVALUE( ItemSet, Id, Cast ) ( ( (const Cast&) (ItemSet).Get( (Id) ) ).GetValue() )
TYPEINIT1( FuMorph, FuPoor );

//////////////////////////////////////////////////////////////////////////////
// constructor
//
FuMorph::FuMorph (
    ViewShell* pViewSh,
    ::sd::Window* pWin,
    ::sd::View* pView,
    SdDrawDocument* pDoc,
    SfxRequest& rReq )
    :   FuPoor(pViewSh, pWin, pView, pDoc, rReq)
{
}

FunctionReference FuMorph::Create( ViewShell* pViewSh, ::sd::Window* pWin, ::sd::View* pView, SdDrawDocument* pDoc, SfxRequest& rReq )
{
    FunctionReference xFunc( new FuMorph( pViewSh, pWin, pView, pDoc, rReq ) );
    xFunc->DoExecute(rReq);
    return xFunc;
}

void FuMorph::DoExecute( SfxRequest& )
{
    const SdrMarkList&  rMarkList = mpView->GetMarkedObjectList();

    if(rMarkList.GetMarkCount() == 2)
    {
        // Clones erzeugen
        SdrObject*  pObj1 = rMarkList.GetMark(0)->GetMarkedSdrObj();
        SdrObject*  pObj2 = rMarkList.GetMark(1)->GetMarkedSdrObj();
        SdrObject*  pCloneObj1 = pObj1->Clone();
        SdrObject*  pCloneObj2 = pObj2->Clone();

        // Text am Clone loeschen, da wir sonst kein richtiges PathObj bekommen
        pCloneObj1->SetOutlinerParaObject(NULL);
        pCloneObj2->SetOutlinerParaObject(NULL);

        // Path-Objekte erzeugen
        SdrObject*  pPolyObj1 = pCloneObj1->ConvertToPolyObj(FALSE, FALSE);
        SdrObject*  pPolyObj2 = pCloneObj2->ConvertToPolyObj(FALSE, FALSE);
        SdAbstractDialogFactory* pFact = SdAbstractDialogFactory::Create();
        AbstractMorphDlg* pDlg = pFact ? pFact->CreateMorphDlg( static_cast< ::Window*>(mpWindow), pObj1, pObj2 ) : 0;
        if(pPolyObj1 && pPolyObj2 && pDlg && (pDlg->Execute() == RET_OK))
        {
            List aPolyPolyList;
            ::basegfx::B2DPolyPolygon aPolyPoly1;
            ::basegfx::B2DPolyPolygon aPolyPoly2;
            ::basegfx::B2DPolyPolygon* pPolyPoly;

            pDlg->SaveSettings();

            // #i48168# Not always is the pPolyObj1/pPolyObj2 a SdrPathObj, it may also be a group object
            // containing SdrPathObjs. To get the polygons, i add two iters here
            SdrObjListIter aIter1(*pPolyObj1);
            SdrObjListIter aIter2(*pPolyObj2);

            while(aIter1.IsMore())
            {
                SdrObject* pObj = aIter1.Next();
                if(pObj && pObj->ISA(SdrPathObj))
                    aPolyPoly1.append(((SdrPathObj*)pObj)->GetPathPoly());
            }

            while(aIter2.IsMore())
            {
                SdrObject* pObj = aIter2.Next();
                if(pObj && pObj->ISA(SdrPathObj))
                    aPolyPoly2.append(((SdrPathObj*)pObj)->GetPathPoly());
            }

            // Morphing durchfuehren
            if(aPolyPoly1.count() && aPolyPoly2.count())
            {
                aPolyPoly1 = ::basegfx::tools::correctOrientations(aPolyPoly1);
                aPolyPoly1.removeDoublePoints();
                ::basegfx::B2VectorOrientation eIsClockwise1(::basegfx::tools::getOrientation(aPolyPoly1.getB2DPolygon(0L)));

                aPolyPoly2 = ::basegfx::tools::correctOrientations(aPolyPoly2);
                aPolyPoly2.removeDoublePoints();
                ::basegfx::B2VectorOrientation eIsClockwise2(::basegfx::tools::getOrientation(aPolyPoly2.getB2DPolygon(0L)));

                // set same orientation
                if(eIsClockwise1 != eIsClockwise2)
                    aPolyPoly2.flip();

                // force same poly count
                if(aPolyPoly1.count() < aPolyPoly2.count())
                    ImpAddPolys(aPolyPoly1, aPolyPoly2);
                else if(aPolyPoly2.count() < aPolyPoly1.count())
                    ImpAddPolys(aPolyPoly2, aPolyPoly1);

                // use orientation flag from dialog
                if(!pDlg->IsOrientationFade())
                    aPolyPoly2.flip();

                // force same point counts
                for( sal_uInt32 a(0L); a < aPolyPoly1.count(); a++ )
                {
                    ::basegfx::B2DPolygon aSub1(aPolyPoly1.getB2DPolygon(a));
                    ::basegfx::B2DPolygon aSub2(aPolyPoly2.getB2DPolygon(a));

                    if(aSub1.count() < aSub2.count())
                        ImpEqualizePolyPointCount(aSub1, aSub2);
                    else if(aSub2.count() < aSub1.count())
                        ImpEqualizePolyPointCount(aSub2, aSub1);

                    aPolyPoly1.setB2DPolygon(a, aSub1);
                    aPolyPoly2.setB2DPolygon(a, aSub2);
                }

                if(ImpMorphPolygons(aPolyPoly1, aPolyPoly2, pDlg->GetFadeSteps(), aPolyPolyList))
                {
                    String aString(mpView->GetDescriptionOfMarkedObjects());

                    aString.Append(sal_Unicode(' '));
                    aString.Append(String(SdResId(STR_UNDO_MORPHING)));

                    mpView->BegUndo(aString);
                    ImpInsertPolygons(aPolyPolyList, pDlg->IsAttributeFade(), pObj1, pObj2);
                    mpView->EndUndo();
                }

                // erzeugte Polygone wieder loeschen
                for(pPolyPoly = (::basegfx::B2DPolyPolygon*)aPolyPolyList.First(); pPolyPoly; pPolyPoly = (::basegfx::B2DPolyPolygon *)aPolyPolyList.Next())
                {
                    delete pPolyPoly;
                }
            }
        }
        delete pDlg;
        SdrObject::Free( pCloneObj1 );
        SdrObject::Free( pCloneObj2 );

        SdrObject::Free( pPolyObj1 );
        SdrObject::Free( pPolyObj2 );
    }
}

::basegfx::B2DPolygon ImpGetExpandedPolygon(const ::basegfx::B2DPolygon& rCandidate, sal_uInt32 nNum)
{
    if(rCandidate.count() && nNum && rCandidate.count() != nNum)
    {
        // length of step in dest poly
        ::basegfx::B2DPolygon aRetval;
        const double fStep(::basegfx::tools::getLength(rCandidate) / (double)(rCandidate.isClosed() ? nNum : nNum - 1L));
        double fDestPos(0.0);
        double fSrcPos(0.0);
        sal_uInt32 nSrcPos(0L);
        sal_uInt32 nSrcPosNext((nSrcPos + 1L == rCandidate.count()) ? 0L : nSrcPos + 1L);
        double fNextSrcLen(::basegfx::B2DVector(rCandidate.getB2DPoint(nSrcPos) - rCandidate.getB2DPoint(nSrcPosNext)).getLength());

        for(sal_uInt32 b(0L); b < nNum; b++)
        {
            // calc fDestPos in source
            while(fSrcPos + fNextSrcLen < fDestPos)
            {
                fSrcPos += fNextSrcLen;
                nSrcPos++;
                nSrcPosNext = (nSrcPos + 1L == rCandidate.count()) ? 0L : nSrcPos + 1L;
                fNextSrcLen = ::basegfx::B2DVector(rCandidate.getB2DPoint(nSrcPos) - rCandidate.getB2DPoint(nSrcPosNext)).getLength();
            }

            // fDestPos is between fSrcPos and (fSrcPos + fNextSrcLen)
            const double fLenA((fDestPos - fSrcPos) / fNextSrcLen);
            const ::basegfx::B2DPoint aOld1(rCandidate.getB2DPoint(nSrcPos));
            const ::basegfx::B2DPoint aOld2(rCandidate.getB2DPoint(nSrcPosNext));
            ::basegfx::B2DPoint aNewPoint(basegfx::interpolate(aOld1, aOld2, fLenA));
            aRetval.append(aNewPoint);

            // next step
            fDestPos += fStep;
        }

        if(aRetval.count() >= 3L)
        {
            aRetval.setClosed(rCandidate.isClosed());
        }

        return aRetval;
    }
    else
    {
        return rCandidate;
    }
}

//////////////////////////////////////////////////////////////////////////////
// make the point count of the polygons equal in adding points
//
void FuMorph::ImpEqualizePolyPointCount(::basegfx::B2DPolygon& rSmall, const ::basegfx::B2DPolygon& rBig)
{
    // create poly with equal point count
    const sal_uInt32 nCnt(rBig.count());
    ::basegfx::B2DPolygon aPoly1(ImpGetExpandedPolygon(rSmall, nCnt));

    // create transformation for rBig to do the compare
    const ::basegfx::B2DRange aSrcSize(::basegfx::tools::getRange(rBig));
    const ::basegfx::B2DPoint aSrcPos(aSrcSize.getCenter());
    const ::basegfx::B2DRange aDstSize(::basegfx::tools::getRange(rSmall));
    const ::basegfx::B2DPoint aDstPos(aDstSize.getCenter());

    basegfx::B2DHomMatrix aTrans(basegfx::tools::createTranslateB2DHomMatrix(-aSrcPos.getX(), -aSrcPos.getY()));
    aTrans.scale(aDstSize.getWidth() / aSrcSize.getWidth(), aDstSize.getHeight() / aSrcSize.getHeight());
    aTrans.translate(aDstPos.getX(), aDstPos.getY());

    // transpose points to have smooth linear blending
    ::basegfx::B2DPolygon aPoly2;
    aPoly2.append(::basegfx::B2DPoint(), nCnt);
    sal_uInt32 nInd(ImpGetNearestIndex(aPoly1, aTrans * rBig.getB2DPoint(0L)));

    for(sal_uInt32 a(0L); a < nCnt; a++)
    {
        aPoly2.setB2DPoint((a + nCnt - nInd) % nCnt, aPoly1.getB2DPoint(a));
    }

    aPoly2.setClosed(rBig.isClosed());
    rSmall = aPoly2;
}

//////////////////////////////////////////////////////////////////////////////
//
sal_uInt32 FuMorph::ImpGetNearestIndex(const ::basegfx::B2DPolygon& rPoly, const ::basegfx::B2DPoint& rPos)
{
    double fMinDist = 0.0;
    sal_uInt32 nActInd = 0;

    for(sal_uInt32 a(0L); a < rPoly.count(); a++)
    {
        double fNewDist(::basegfx::B2DVector(rPoly.getB2DPoint(a) - rPos).getLength());

        if(!a || fNewDist < fMinDist)
        {
            fMinDist = fNewDist;
            nActInd = a;
        }
    }

    return nActInd;
}

//////////////////////////////////////////////////////////////////////////////
// add to a point reduced polys until count is same
//
void FuMorph::ImpAddPolys(::basegfx::B2DPolyPolygon& rSmaller, const ::basegfx::B2DPolyPolygon& rBigger)
{
    while(rSmaller.count() < rBigger.count())
    {
        const ::basegfx::B2DPolygon aToBeCopied(rBigger.getB2DPolygon(rSmaller.count()));
        const ::basegfx::B2DRange aToBeCopiedPolySize(::basegfx::tools::getRange(aToBeCopied));
        ::basegfx::B2DPoint aNewPoint(aToBeCopiedPolySize.getCenter());
        ::basegfx::B2DPolygon aNewPoly;

        const ::basegfx::B2DRange aSrcSize(::basegfx::tools::getRange(rBigger.getB2DPolygon(0L)));
        const ::basegfx::B2DPoint aSrcPos(aSrcSize.getCenter());
        const ::basegfx::B2DRange aDstSize(::basegfx::tools::getRange(rSmaller.getB2DPolygon(0L)));
        const ::basegfx::B2DPoint aDstPos(aDstSize.getCenter());
        aNewPoint = aNewPoint - aSrcPos + aDstPos;

        for(sal_uInt32 a(0L); a < aToBeCopied.count(); a++)
        {
            aNewPoly.append(aNewPoint);
        }

        rSmaller.append(aNewPoly);
    }
}

//////////////////////////////////////////////////////////////////////////////
// create group object with morphed polygons
//
void FuMorph::ImpInsertPolygons(List& rPolyPolyList3D, BOOL bAttributeFade,
    const SdrObject* pObj1, const SdrObject* pObj2)
{
    Color               aStartFillCol;
    Color               aEndFillCol;
    Color               aStartLineCol;
    Color               aEndLineCol;
    long                nStartLineWidth = 0;
    long                nEndLineWidth = 0;
    SdrPageView*        pPageView = mpView->GetSdrPageView();
    SfxItemPool*        pPool = pObj1->GetObjectItemPool();
    SfxItemSet          aSet1( *pPool,SDRATTR_START,SDRATTR_NOTPERSIST_FIRST-1,EE_ITEMS_START,EE_ITEMS_END,0 );
    SfxItemSet          aSet2( aSet1 );
    BOOL                bLineColor = FALSE;
    BOOL                bFillColor = FALSE;
    BOOL                bLineWidth = FALSE;
    BOOL                bIgnoreLine = FALSE;
    BOOL                bIgnoreFill = FALSE;

    aSet1.Put(pObj1->GetMergedItemSet());
    aSet2.Put(pObj2->GetMergedItemSet());

    const XLineStyle eLineStyle1 = ITEMVALUE( aSet1, XATTR_LINESTYLE, XLineStyleItem );
    const XLineStyle eLineStyle2 = ITEMVALUE( aSet2, XATTR_LINESTYLE, XLineStyleItem );
    const XFillStyle eFillStyle1 = ITEMVALUE( aSet1, XATTR_FILLSTYLE, XFillStyleItem );
    const XFillStyle eFillStyle2 = ITEMVALUE( aSet2, XATTR_FILLSTYLE, XFillStyleItem );

    if ( bAttributeFade )
    {
        if ( ( eLineStyle1 != XLINE_NONE ) && ( eLineStyle2 != XLINE_NONE ) )
        {
            bLineWidth = bLineColor = TRUE;

            aStartLineCol = static_cast< XLineColorItem const & >(
                aSet1.Get(XATTR_LINECOLOR)).GetColorValue();
            aEndLineCol = static_cast< XLineColorItem const & >(
                aSet2.Get(XATTR_LINECOLOR)).GetColorValue();

            nStartLineWidth = ITEMVALUE( aSet1, XATTR_LINEWIDTH, XLineWidthItem );
            nEndLineWidth = ITEMVALUE( aSet2, XATTR_LINEWIDTH, XLineWidthItem );
        }
        else if ( ( eLineStyle1 == XLINE_NONE ) && ( eLineStyle2 == XLINE_NONE ) )
            bIgnoreLine = TRUE;

        if ( ( eFillStyle1 == XFILL_SOLID ) && ( eFillStyle2 == XFILL_SOLID ) )
        {
            bFillColor = TRUE;
            aStartFillCol = static_cast< XFillColorItem const & >(
                aSet1.Get(XATTR_FILLCOLOR)).GetColorValue();
            aEndFillCol = static_cast< XFillColorItem const & >(
                aSet2.Get(XATTR_FILLCOLOR)).GetColorValue();
        }
        else if ( ( eFillStyle1 == XFILL_NONE ) && ( eFillStyle2 == XFILL_NONE ) )
            bIgnoreFill = TRUE;
    }

    if ( pPageView )
    {
        SfxItemSet      aSet( aSet1 );
        SdrObjGroup*    pObjGroup = new SdrObjGroup;
        SdrObjList*     pObjList = pObjGroup->GetSubList();
        const ULONG     nCount = rPolyPolyList3D.Count();
        const double    fStep = 1. / ( nCount + 1 );
        const double    fDelta = nEndLineWidth - nStartLineWidth;
        double          fFactor = fStep;

        aSet.Put( XLineStyleItem( XLINE_SOLID ) );
        aSet.Put( XFillStyleItem( XFILL_SOLID ) );

        for ( ULONG i = 0; i < nCount; i++, fFactor += fStep )
        {
            const ::basegfx::B2DPolyPolygon& rPolyPoly3D = *(::basegfx::B2DPolyPolygon*)rPolyPolyList3D.GetObject(i);
            SdrPathObj* pNewObj = new SdrPathObj(OBJ_POLY, rPolyPoly3D);

            // Linienfarbe
            if ( bLineColor )
            {
                const basegfx::BColor aLineColor(basegfx::interpolate(aStartLineCol.getBColor(), aEndLineCol.getBColor(), fFactor));
                aSet.Put( XLineColorItem( aEmptyStr, Color(aLineColor)));
            }
            else if ( bIgnoreLine )
                aSet.Put( XLineStyleItem( XLINE_NONE ) );

            // Fuellfarbe
            if ( bFillColor )
            {
                const basegfx::BColor aFillColor(basegfx::interpolate(aStartFillCol.getBColor(), aEndFillCol.getBColor(), fFactor));
                aSet.Put( XFillColorItem( aEmptyStr, Color(aFillColor)));
            }
            else if ( bIgnoreFill )
                aSet.Put( XFillStyleItem( XFILL_NONE ) );

            // Linienstaerke
            if ( bLineWidth )
                aSet.Put( XLineWidthItem( nStartLineWidth + (long) ( fFactor * fDelta + 0.5 ) ) );

            pNewObj->SetMergedItemSetAndBroadcast(aSet);

            pObjList->InsertObject( pNewObj, LIST_APPEND );
        }

        if ( nCount )
        {
            pObjList->InsertObject( pObj1->Clone(), 0 );
            pObjList->InsertObject( pObj2->Clone(), LIST_APPEND );
            mpView->DeleteMarked();
            mpView->InsertObjectAtView( pObjGroup, *pPageView, SDRINSERT_SETDEFLAYER );
        }
    }
}

//////////////////////////////////////////////////////////////////////////////
// create single morphed PolyPolygon
//
::basegfx::B2DPolyPolygon* FuMorph::ImpCreateMorphedPolygon(
    const ::basegfx::B2DPolyPolygon& rPolyPolyStart,
    const ::basegfx::B2DPolyPolygon& rPolyPolyEnd,
    double fMorphingFactor)
{
    ::basegfx::B2DPolyPolygon* pNewPolyPolygon = new ::basegfx::B2DPolyPolygon();
    const double fFactor = 1.0 - fMorphingFactor;

    for(sal_uInt32 a(0L); a < rPolyPolyStart.count(); a++)
    {
        const ::basegfx::B2DPolygon aPolyStart(rPolyPolyStart.getB2DPolygon(a));
        const ::basegfx::B2DPolygon aPolyEnd(rPolyPolyEnd.getB2DPolygon(a));
        const sal_uInt32 nCount(aPolyStart.count());
        ::basegfx::B2DPolygon aNewPolygon;

        for(sal_uInt32 b(0L); b < nCount; b++)
        {
            const ::basegfx::B2DPoint& aPtStart(aPolyStart.getB2DPoint(b));
            const ::basegfx::B2DPoint& aPtEnd(aPolyEnd.getB2DPoint(b));
            aNewPolygon.append(aPtEnd + ((aPtStart - aPtEnd) * fFactor));
        }

        aNewPolygon.setClosed(aPolyStart.isClosed() && aPolyEnd.isClosed());
        pNewPolyPolygon->append(aNewPolygon);
    }

    return pNewPolyPolygon;
}

//////////////////////////////////////////////////////////////////////////////
// create morphed PolyPolygons
//
sal_Bool FuMorph::ImpMorphPolygons(
    const ::basegfx::B2DPolyPolygon& rPolyPoly1,
    const ::basegfx::B2DPolyPolygon& rPolyPoly2,
    const sal_uInt16 nSteps, List& rPolyPolyList3D)
{
    if(nSteps)
    {
        const ::basegfx::B2DRange aStartPolySize(::basegfx::tools::getRange(rPolyPoly1));
        const ::basegfx::B2DPoint aStartCenter(aStartPolySize.getCenter());
        const ::basegfx::B2DRange aEndPolySize(::basegfx::tools::getRange(rPolyPoly2));
        const ::basegfx::B2DPoint aEndCenter(aEndPolySize.getCenter());
        const ::basegfx::B2DPoint aDelta(aEndCenter - aStartCenter);
        const double fFactor(1.0 / (nSteps + 1));
        double fValue(0.0);

        for(sal_uInt16 i(0); i < nSteps; i++)
        {
            fValue += fFactor;
            ::basegfx::B2DPolyPolygon* pNewPolyPoly2D = ImpCreateMorphedPolygon(rPolyPoly1, rPolyPoly2, fValue);

            const ::basegfx::B2DRange aNewPolySize(::basegfx::tools::getRange(*pNewPolyPoly2D));
            const ::basegfx::B2DPoint aNewS(aNewPolySize.getCenter());
            const ::basegfx::B2DPoint aRealS(aStartCenter + (aDelta * fValue));
            const ::basegfx::B2DPoint aDiff(aRealS - aNewS);

            pNewPolyPoly2D->transform(basegfx::tools::createTranslateB2DHomMatrix(aDiff));
            rPolyPolyList3D.Insert(pNewPolyPoly2D, LIST_APPEND);
        }
    }
    return TRUE;
}


} // end of namespace sd