pagepreviewprimitive2d.cxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 *   Licensed to the Apache Software Foundation (ASF) under one or more
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#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>
#include <utility>
 
 
using namespace com::sun::star;
 
 
namespace drawinglayer::primitive2d
{
        void PagePreviewPrimitive2D::create2DDecomposition(Primitive2DContainer& rContainer, const geometry::ViewInformation2D& rViewInformation) const
        {
            Primitive2DContainer aContent(getPageContent());
 
            if(!(!aContent.empty()
                && basegfx::fTools::more(getContentWidth(), 0.0)
                && basegfx::fTools::more(getContentHeight(), 0.0)))
                return;
 
            // 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)))
                return;
 
            // check if content overlaps with target size and needs to be embedded with a
            // clipping primitive
            const basegfx::B2DRange aRealContentRange(aContent.getB2DRange(rViewInformation));
            const basegfx::B2DRange aAllowedContentRange(0.0, 0.0, getContentWidth(), getContentHeight());
 
            if(!aAllowedContentRange.isInside(aRealContentRange))
            {
                const Primitive2DReference xReferenceA(
                    new MaskPrimitive2D(
                        basegfx::B2DPolyPolygon(
                            basegfx::utils::createPolygonFromRect(aAllowedContentRange)), std::move(aContent)));
                aContent = Primitive2DContainer { xReferenceA };
            }
 
            // create a mapping from content to object.
            basegfx::B2DHomMatrix aPageTrans;
 
            // #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::utils::createShearXRotateTranslateB2DHomMatrix(
                    fShearX, fRotate, aTranslate.getX(), aTranslate.getY()));
            aPageTrans = aCombined * aPageTrans;
 
            // embed in necessary transformation to map from SdrPage to SdrPageObject
            rContainer.push_back(new TransformPrimitive2D(aPageTrans, std::move(aContent)));
        }
 
        PagePreviewPrimitive2D::PagePreviewPrimitive2D(
            css::uno::Reference< css::drawing::XDrawPage > xDrawPage,
            basegfx::B2DHomMatrix aTransform,
            double fContentWidth,
            double fContentHeight,
            Primitive2DContainer&& rPageContent)
        :   mxDrawPage(std::move(xDrawPage)),
            maPageContent(std::move(rPageContent)),
            maTransform(std::move(aTransform)),
            mfContentWidth(fContentWidth),
            mfContentHeight(fContentHeight)
        {
        }
 
        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());
            }
 
            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
        sal_uInt32 PagePreviewPrimitive2D::getPrimitive2DID() const
        {
            return PRIMITIVE2D_ID_PAGEPREVIEWPRIMITIVE2D;
        }
 
} // end of namespace
 
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