drawinglayer/source/primitive2d/pagepreviewprimitive2d.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
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   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
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  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <drawinglayer/primitive2d/pagepreviewprimitive2d.hxx>
  21 #include <drawinglayer/primitive2d/drawinglayer_primitivetypes2d.hxx>
  22 #include <drawinglayer/primitive2d/maskprimitive2d.hxx>
  23 #include <basegfx/polygon/b2dpolygontools.hxx>
  24 #include <basegfx/polygon/b2dpolygon.hxx>
  25 #include <drawinglayer/primitive2d/transformprimitive2d.hxx>
  26 #include <basegfx/matrix/b2dhommatrixtools.hxx>
  27
  28
  29 using namespace com::sun::star;
  30
  31
  32 namespace drawinglayer
  33 {
  34     namespace primitive2d
  35     {
  36         void PagePreviewPrimitive2D::create2DDecomposition(Primitive2DContainer& rContainer, const geometry::ViewInformation2D& rViewInformation) const
  37         {
  38             Primitive2DContainer aContent(getPageContent());
  39
  40             if(!aContent.empty()
  41                 && basegfx::fTools::more(getContentWidth(), 0.0)
  42                 && basegfx::fTools::more(getContentHeight(), 0.0))
  43             {
  44                 // the decomposed matrix will be needed
  45                 basegfx::B2DVector aScale, aTranslate;
  46                 double fRotate, fShearX;
  47                 getTransform().decompose(aScale, aTranslate, fRotate, fShearX);
  48
  49                 if(basegfx::fTools::more(aScale.getX(), 0.0) && basegfx::fTools::more(aScale.getY(), 0.0))
  50                 {
  51                     // check if content overlaps with target size and needs to be embedded with a
  52                     // clipping primitive
  53                     const basegfx::B2DRange aRealContentRange(aContent.getB2DRange(rViewInformation));
  54                     const basegfx::B2DRange aAllowedContentRange(0.0, 0.0, getContentWidth(), getContentHeight());
  55
  56                     if(!aAllowedContentRange.isInside(aRealContentRange))
  57                     {
  58                         const Primitive2DReference xReferenceA(
  59                             new MaskPrimitive2D(
  60                                 basegfx::B2DPolyPolygon(
  61                                     basegfx::utils::createPolygonFromRect(aAllowedContentRange)), aContent));
  62                         aContent = Primitive2DContainer { xReferenceA };
  63                     }
  64
  65                     // create a mapping from content to object.
  66                     basegfx::B2DHomMatrix aPageTrans;
  67
  68                     // #i101075# when keeping the aspect ratio is wanted, it is necessary to calculate
  69                     // an equidistant scaling in X and Y and a corresponding translation to
  70                     // center the output. Calculate needed scale factors
  71                     const double fScaleX(aScale.getX() / getContentWidth());
  72                     const double fScaleY(aScale.getY() / getContentHeight());
  73
  74                     // to keep the aspect, use the smaller scale and adapt missing size by translation
  75                     if(fScaleX < fScaleY)
  76                     {
  77                         // height needs to be adapted
  78                         const double fNeededHeight(aScale.getY() / fScaleX);
  79                         const double fSpaceToAdd(fNeededHeight - getContentHeight());
  80
  81                         aPageTrans.translate(0.0, fSpaceToAdd * 0.5);
  82                         aPageTrans.scale(fScaleX, aScale.getY() / fNeededHeight);
  83                     }
  84                     else
  85                     {
  86                         // width needs to be adapted
  87                         const double fNeededWidth(aScale.getX() / fScaleY);
  88                         const double fSpaceToAdd(fNeededWidth - getContentWidth());
  89
  90                         aPageTrans.translate(fSpaceToAdd * 0.5, 0.0);
  91                         aPageTrans.scale(aScale.getX() / fNeededWidth, fScaleY);
  92                     }
  93
  94                     // add the missing object transformation aspects
  95                     const basegfx::B2DHomMatrix aCombined(basegfx::utils::createShearXRotateTranslateB2DHomMatrix(
  96                             fShearX, fRotate, aTranslate.getX(), aTranslate.getY()));
  97                     aPageTrans = aCombined * aPageTrans;
  98
  99                     // embed in necessary transformation to map from SdrPage to SdrPageObject
 100                     rContainer.push_back(new TransformPrimitive2D(aPageTrans, aContent));
 101                 }
 102             }
 103         }
 104
 105         PagePreviewPrimitive2D::PagePreviewPrimitive2D(
 106             const css::uno::Reference< css::drawing::XDrawPage >& rxDrawPage,
 107             const basegfx::B2DHomMatrix& rTransform,
 108             double fContentWidth,
 109             double fContentHeight,
 110             const Primitive2DContainer& rPageContent)
 111         :   BufferedDecompositionPrimitive2D(),
 112             mxDrawPage(rxDrawPage),
 113             maPageContent(rPageContent),
 114             maTransform(rTransform),
 115             mfContentWidth(fContentWidth),
 116             mfContentHeight(fContentHeight)
 117         {
 118         }
 119
 120         bool PagePreviewPrimitive2D::operator==(const BasePrimitive2D& rPrimitive) const
 121         {
 122             if(BasePrimitive2D::operator==(rPrimitive))
 123             {
 124                 const PagePreviewPrimitive2D& rCompare = static_cast< const PagePreviewPrimitive2D& >(rPrimitive);
 125
 126                 return (getXDrawPage() == rCompare.getXDrawPage()
 127                     && getPageContent() == rCompare.getPageContent()
 128                     && getTransform() == rCompare.getTransform()
 129                     && getContentWidth() == rCompare.getContentWidth()
 130                     && getContentHeight() == rCompare.getContentHeight());
 131             }
 132
 133             return false;
 134         }
 135
 136         basegfx::B2DRange PagePreviewPrimitive2D::getB2DRange(const geometry::ViewInformation2D& /*rViewInformation`*/) const
 137         {
 138             // nothing is allowed to stick out of a PagePreviewPrimitive, thus we
 139             // can quickly deliver our range here
 140             basegfx::B2DRange aRetval(0.0, 0.0, 1.0, 1.0);
 141             aRetval.transform(getTransform());
 142             return aRetval;
 143         }
 144
 145         // provide unique ID
 146         ImplPrimitive2DIDBlock(PagePreviewPrimitive2D, PRIMITIVE2D_ID_PAGEPREVIEWPRIMITIVE2D)
 147
 148     } // end of namespace primitive2d
 149 } // end of namespace drawinglayer
 150
 151 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */