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

#include <drawinglayer/primitive2d/pagepreviewprimitive2d.hxx>
#include <drawinglayer/primitive2d/drawinglayer_primitivetypes2d.hxx>
#include <drawinglayer/primitive2d/maskprimitive2d.hxx>
#include <basegfx/polygon/b2dpolygontools.hxx>
#include <basegfx/polygon/b2dpolygon.hxx>
#include <drawinglayer/primitive2d/transformprimitive2d.hxx>
#include <basegfx/matrix/b2dhommatrixtools.hxx>

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

using namespace com::sun::star;

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

namespace drawinglayer
{
	namespace primitive2d
	{
		Primitive2DSequence PagePreviewPrimitive2D::create2DDecomposition(const geometry::ViewInformation2D& rViewInformation) const
		{
			Primitive2DSequence xRetval;
			Primitive2DSequence aContent(getPageContent());

			if(aContent.hasElements()
				&& basegfx::fTools::more(getContentWidth(), 0.0)
				&& basegfx::fTools::more(getContentHeight(), 0.0))
			{
				// the decomposed matrix will be needed
				basegfx::B2DVector aScale, aTranslate;
				double fRotate, fShearX;
				getTransform().decompose(aScale, aTranslate, fRotate, fShearX);

				if(basegfx::fTools::more(aScale.getX(), 0.0) && basegfx::fTools::more(aScale.getY(), 0.0))
				{
					// check if content overlaps with targeted size and needs to be embedded with a
					// clipping primitive
					const basegfx::B2DRange aRealContentRange(getB2DRangeFromPrimitive2DSequence(aContent, rViewInformation));
					const basegfx::B2DRange aAllowedContentRange(0.0, 0.0, getContentWidth(), getContentHeight());

					if(!aAllowedContentRange.isInside(aRealContentRange))
					{
						const Primitive2DReference xReferenceA(
							new MaskPrimitive2D(
								basegfx::B2DPolyPolygon(
									basegfx::tools::createPolygonFromRect(aAllowedContentRange)), aContent));
						aContent = Primitive2DSequence(&xReferenceA, 1);
					}

					// create a mapping from content to object.
					basegfx::B2DHomMatrix aPageTrans;

					if(getKeepAspectRatio())
					{
						// #i101075# when keeping the aspect ratio is wanted, it is necessary to calculate
						// an equidistant scaling in X and Y and a corresponding translation to
						// center the output. Calculate needed scale factors
						const double fScaleX(aScale.getX() / getContentWidth());
						const double fScaleY(aScale.getY() / getContentHeight());

						// to keep the aspect, use the smaller scale and adapt missing size by translation
						if(fScaleX < fScaleY)
						{
							// height needs to be adapted
							const double fNeededHeight(aScale.getY() / fScaleX);
							const double fSpaceToAdd(fNeededHeight - getContentHeight());

							aPageTrans.translate(0.0, fSpaceToAdd * 0.5);
							aPageTrans.scale(fScaleX, aScale.getY() / fNeededHeight);
						}
						else
						{
							// width needs to be adapted
							const double fNeededWidth(aScale.getX() / fScaleY);
							const double fSpaceToAdd(fNeededWidth - getContentWidth());

							aPageTrans.translate(fSpaceToAdd * 0.5, 0.0);
							aPageTrans.scale(aScale.getX() / fNeededWidth, fScaleY);
						}

						// add the missing object transformation aspects
						const basegfx::B2DHomMatrix aCombined(basegfx::tools::createShearXRotateTranslateB2DHomMatrix(
							fShearX, fRotate, aTranslate.getX(), aTranslate.getY()));
						aPageTrans = aCombined * aPageTrans;
					}
					else
					{
						// completely scale to PageObject size. Scale to unit size.
						aPageTrans.scale(1.0/ getContentWidth(), 1.0 / getContentHeight());

						// apply object matrix
						aPageTrans *= getTransform();
					}

					// embed in necessary transformation to map from SdrPage to SdrPageObject
					const Primitive2DReference xReferenceB(new TransformPrimitive2D(aPageTrans, aContent));
					xRetval = Primitive2DSequence(&xReferenceB, 1);
				}
			}

			return xRetval;
		}

		PagePreviewPrimitive2D::PagePreviewPrimitive2D(
			const ::com::sun::star::uno::Reference< ::com::sun::star::drawing::XDrawPage >& rxDrawPage,
			const basegfx::B2DHomMatrix& rTransform,
			double fContentWidth,
			double fContentHeight,
			const Primitive2DSequence& rPageContent,
			bool bKeepAspectRatio)
		:	BufferedDecompositionPrimitive2D(),
			mxDrawPage(rxDrawPage),
			maPageContent(rPageContent),
			maTransform(rTransform),
			mfContentWidth(fContentWidth),
			mfContentHeight(fContentHeight),
			mbKeepAspectRatio(bKeepAspectRatio)
		{
		}

		bool PagePreviewPrimitive2D::operator==(const BasePrimitive2D& rPrimitive) const
		{
			if(BasePrimitive2D::operator==(rPrimitive))
			{
				const PagePreviewPrimitive2D& rCompare = static_cast< const PagePreviewPrimitive2D& >(rPrimitive);

				return (getXDrawPage() == rCompare.getXDrawPage()
					&& getPageContent() == rCompare.getPageContent()
					&& getTransform() == rCompare.getTransform()
					&& getContentWidth() == rCompare.getContentWidth()
					&& getContentHeight() == rCompare.getContentHeight()
					&& getKeepAspectRatio() == rCompare.getKeepAspectRatio());
			}

			return false;
		}

		basegfx::B2DRange PagePreviewPrimitive2D::getB2DRange(const geometry::ViewInformation2D& /*rViewInformation`*/) const
		{
			// nothing is allowed to stick out of a PagePreviewPrimitive, thus we
			// can quickly deliver our range here
			basegfx::B2DRange aRetval(0.0, 0.0, 1.0, 1.0);
			aRetval.transform(getTransform());
			return aRetval;
		}

		// provide unique ID
		ImplPrimitrive2DIDBlock(PagePreviewPrimitive2D, PRIMITIVE2D_ID_PAGEPREVIEWPRIMITIVE2D)

	} // end of namespace primitive2d
} // end of namespace drawinglayer

/* vim: set noet sw=4 ts=4: */