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 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
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 * with the License.  You may obtain a copy of the License at
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 * KIND, either express or implied.  See the License for the
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_svx.hxx"

#include <svx/sdr/contact/viewcontactofsdrpathobj.hxx>
#include <svx/svdopath.hxx>
#include <svx/sdr/primitive2d/sdrattributecreator.hxx>
#include <basegfx/polygon/b2dpolypolygontools.hxx>
#include <svx/sdr/primitive2d/sdrpathprimitive2d.hxx>
#include <basegfx/matrix/b2dhommatrixtools.hxx>

//////////////////////////////////////////////////////////////////////////////

namespace sdr
{
	namespace contact
	{
		ViewContactOfSdrPathObj::ViewContactOfSdrPathObj(SdrPathObj& rPathObj)
		:	ViewContactOfTextObj(rPathObj)
		{
		}

		ViewContactOfSdrPathObj::~ViewContactOfSdrPathObj()
		{
		}

		drawinglayer::primitive2d::Primitive2DSequence ViewContactOfSdrPathObj::createViewIndependentPrimitive2DSequence() const
		{
			const SfxItemSet& rItemSet = GetPathObj().GetMergedItemSet();
			const drawinglayer::attribute::SdrLineFillShadowTextAttribute aAttribute(
				drawinglayer::primitive2d::createNewSdrLineFillShadowTextAttribute(
					rItemSet, 
					GetPathObj().getText(0),
                    false));
            basegfx::B2DPolyPolygon aUnitPolyPolygon(GetPathObj().GetPathPoly());
			sal_uInt32 nPolyCount(aUnitPolyPolygon.count());
			sal_uInt32 nPointCount(0);

			for(sal_uInt32 a(0); a < nPolyCount; a++)
			{
				nPointCount += aUnitPolyPolygon.getB2DPolygon(a).count();
			}

			if(!nPointCount)
			{
				OSL_ENSURE(false, "PolyPolygon object without geometry detected, this should not be created (!)");
				basegfx::B2DPolygon aFallbackLine;
				aFallbackLine.append(basegfx::B2DPoint(0.0, 0.0));
				aFallbackLine.append(basegfx::B2DPoint(1000.0, 1000.0));
				aUnitPolyPolygon = basegfx::B2DPolyPolygon(aFallbackLine);
				
				nPolyCount = 1;
			}

			// prepare object transformation and unit polygon (direct model data)
			basegfx::B2DHomMatrix aObjectMatrix;
			const bool bIsLine(
				!aUnitPolyPolygon.areControlPointsUsed()
				&& 1 == nPolyCount 
				&& 2 == aUnitPolyPolygon.getB2DPolygon(0).count());

			if(bIsLine)
			{
				// special handling for single line mode (2 points)
				const basegfx::B2DPolygon aSubPolygon(aUnitPolyPolygon.getB2DPolygon(0));
				const basegfx::B2DPoint aStart(aSubPolygon.getB2DPoint(0));
				const basegfx::B2DPoint aEnd(aSubPolygon.getB2DPoint(1));
				const basegfx::B2DVector aLine(aEnd - aStart);

				// #i102548# create new unit polygon for line (horizontal)
				basegfx::B2DPolygon aNewPolygon;
				aNewPolygon.append(basegfx::B2DPoint(0.0, 0.0));
				aNewPolygon.append(basegfx::B2DPoint(1.0, 0.0));
				aUnitPolyPolygon.setB2DPolygon(0, aNewPolygon);

				// #i102548# fill objectMatrix with rotation and offset (no shear for lines)
				aObjectMatrix = basegfx::tools::createScaleShearXRotateTranslateB2DHomMatrix(
					aLine.getLength(), 1.0,
					0.0,
					atan2(aLine.getY(), aLine.getX()),
					aStart.getX(), aStart.getY());
			}
			else
			{
				// #i102548# create unscaled, unsheared, unrotated and untranslated polygon
				// (unit polygon) by creating the object matrix and back-transforming the polygon
				const basegfx::B2DRange aObjectRange(basegfx::tools::getRange(aUnitPolyPolygon));
				const GeoStat& rGeoStat(GetPathObj().GetGeoStat());
				const double fWidth(aObjectRange.getWidth());
				const double fHeight(aObjectRange.getHeight());
				const double fScaleX(basegfx::fTools::equalZero(fWidth) ? 1.0 : fWidth);
				const double fScaleY(basegfx::fTools::equalZero(fHeight) ? 1.0 : fHeight);

				aObjectMatrix = basegfx::tools::createScaleShearXRotateTranslateB2DHomMatrix(
					fScaleX, fScaleY,
					rGeoStat.nShearWink ? tan((36000 - rGeoStat.nShearWink) * F_PI18000) : 0.0,
					rGeoStat.nDrehWink ? (36000 - rGeoStat.nDrehWink) * F_PI18000 : 0.0,
					aObjectRange.getMinX(), aObjectRange.getMinY());

				// ceate unit polygon from object's absolute path
				basegfx::B2DHomMatrix aInverse(aObjectMatrix);
				aInverse.invert();
				aUnitPolyPolygon.transform(aInverse);
			}

			// create primitive. Always create primitives to allow the decomposition of 
			// SdrPathPrimitive2D to create needed invisible elements for HitTest and/or BoundRect
			const drawinglayer::primitive2d::Primitive2DReference xReference(
				new drawinglayer::primitive2d::SdrPathPrimitive2D(
					aObjectMatrix, 
					aAttribute, 
					aUnitPolyPolygon));

			return drawinglayer::primitive2d::Primitive2DSequence(&xReference, 1);
		}
	} // end of namespace contact
} // end of namespace sdr

//////////////////////////////////////////////////////////////////////////////
// eof