svx/source/sdr/contact/viewcontactofsdrpathobj.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   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
  13  *   with this work for additional information regarding copyright
  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
  21 #include <sdr/contact/viewcontactofsdrpathobj.hxx>
  22 #include <svx/svdopath.hxx>
  23 #include <svx/svdpage.hxx>
  24 #include <svx/sdr/primitive2d/sdrattributecreator.hxx>
  25 #include <basegfx/polygon/b2dpolypolygontools.hxx>
  26 #include <basegfx/polygon/b2dpolygonclipper.hxx>
  27 #include <sdr/primitive2d/sdrpathprimitive2d.hxx>
  28 #include <basegfx/matrix/b2dhommatrixtools.hxx>
  29
  30
  31 namespace sdr
  32 {
  33     namespace contact
  34     {
  35         ViewContactOfSdrPathObj::ViewContactOfSdrPathObj(SdrPathObj& rPathObj)
  36         :   ViewContactOfTextObj(rPathObj)
  37         {
  38         }
  39
  40         ViewContactOfSdrPathObj::~ViewContactOfSdrPathObj()
  41         {
  42         }
  43
  44         static sal_uInt32 ensureGeometry(basegfx::B2DPolyPolygon& rUnitPolyPolygon)
  45         {
  46             sal_uInt32 nPolyCount(rUnitPolyPolygon.count());
  47             sal_uInt32 nPointCount(0);
  48
  49             for(sal_uInt32 a(0); a < nPolyCount; a++)
  50             {
  51                 nPointCount += rUnitPolyPolygon.getB2DPolygon(a).count();
  52             }
  53
  54             if(!nPointCount)
  55             {
  56                 OSL_FAIL("PolyPolygon object without geometry detected, this should not be created (!)");
  57                 basegfx::B2DPolygon aFallbackLine;
  58                 aFallbackLine.append(basegfx::B2DPoint(0.0, 0.0));
  59                 aFallbackLine.append(basegfx::B2DPoint(1000.0, 1000.0));
  60                 rUnitPolyPolygon = basegfx::B2DPolyPolygon(aFallbackLine);
  61
  62                 nPolyCount = 1;
  63             }
  64
  65             return nPolyCount;
  66         }
  67
  68         drawinglayer::primitive2d::Primitive2DContainer ViewContactOfSdrPathObj::createViewIndependentPrimitive2DSequence() const
  69         {
  70             const SfxItemSet& rItemSet = GetPathObj().GetMergedItemSet();
  71             const drawinglayer::attribute::SdrLineFillShadowTextAttribute aAttribute(
  72                 drawinglayer::primitive2d::createNewSdrLineFillShadowTextAttribute(
  73                     rItemSet,
  74                     GetPathObj().getText(0),
  75                     false));
  76             basegfx::B2DPolyPolygon aUnitPolyPolygon(GetPathObj().GetPathPoly());
  77             Point aGridOff = GetPathObj().GetGridOffset();
  78             // Hack for calc, transform position of object according
  79             // to current zoom so as objects relative position to grid
  80             // appears stable
  81             aUnitPolyPolygon.transform( basegfx::tools::createTranslateB2DHomMatrix( aGridOff.X(), aGridOff.Y() ) );
  82             sal_uInt32 nPolyCount(ensureGeometry(aUnitPolyPolygon));
  83
  84             // prepare object transformation and unit polygon (direct model data)
  85             basegfx::B2DHomMatrix aObjectMatrix;
  86             bool bIsLine(
  87                 !aUnitPolyPolygon.areControlPointsUsed()
  88                 && 1 == nPolyCount
  89                 && 2 == aUnitPolyPolygon.getB2DPolygon(0).count());
  90
  91             if(bIsLine)
  92             {
  93                 //tdf#63955 if we have an extremely long line then clip it to a
  94                 //very generous range of -1 page width/height vs +1 page
  95                 //width/height to avoid oom and massive churn generating a huge
  96                 //polygon chain to cover the length in applyLineDashing if this
  97                 //line is dashed
  98                 const SdrPage* pPage = GetPathObj().GetPage();
  99                 sal_Int32 nPageWidth = pPage ? pPage->GetWdt() : 0;
 100                 sal_Int32 nPageHeight = pPage ? pPage->GetHgt() : 0;
 101
 102                 //But, see tdf#101187, only do this if our generous clip region
 103                 //would not over flow into a tiny clip region
 104                 if (nPageWidth < SAL_MAX_INT32/2 && nPageHeight < SAL_MAX_INT32/2)
 105                 {
 106                     //But, see tdf#97276 and tdf#98366. Don't clip too much if the
 107                     //underlying page dimension is unknown or a paste document
 108                     //where the page sizes use the odd default of 10x10
 109                     nPageWidth = std::max<sal_Int32>(21000, nPageWidth);
 110                     nPageHeight = std::max<sal_Int32>(29700, nPageHeight);
 111                     basegfx::B2DRange aClipRange(-nPageWidth, -nPageHeight,
 112                                                  nPageWidth*2, nPageHeight*2);
 113
 114                     aUnitPolyPolygon = basegfx::tools::clipPolyPolygonOnRange(aUnitPolyPolygon,
 115                                                                        aClipRange, true, true);
 116                     nPolyCount = ensureGeometry(aUnitPolyPolygon);
 117
 118                     // re-check that we have't been clipped out to oblivion
 119                     bIsLine =
 120                         !aUnitPolyPolygon.areControlPointsUsed()
 121                         && 1 == nPolyCount
 122                         && 2 == aUnitPolyPolygon.getB2DPolygon(0).count();
 123                 }
 124             }
 125
 126             if(bIsLine)
 127             {
 128
 129                 // special handling for single line mode (2 points)
 130                 const basegfx::B2DPolygon aSubPolygon(aUnitPolyPolygon.getB2DPolygon(0));
 131                 const basegfx::B2DPoint aStart(aSubPolygon.getB2DPoint(0));
 132                 const basegfx::B2DPoint aEnd(aSubPolygon.getB2DPoint(1));
 133                 const basegfx::B2DVector aLine(aEnd - aStart);
 134
 135                 // #i102548# create new unit polygon for line (horizontal)
 136                 basegfx::B2DPolygon aNewPolygon;
 137                 aNewPolygon.append(basegfx::B2DPoint(0.0, 0.0));
 138                 aNewPolygon.append(basegfx::B2DPoint(1.0, 0.0));
 139                 aUnitPolyPolygon.setB2DPolygon(0, aNewPolygon);
 140
 141                 // #i102548# fill objectMatrix with rotation and offset (no shear for lines)
 142                 aObjectMatrix = basegfx::tools::createScaleShearXRotateTranslateB2DHomMatrix(
 143                     aLine.getLength(), 1.0,
 144                     0.0,
 145                     atan2(aLine.getY(), aLine.getX()),
 146                     aStart.getX(), aStart.getY());
 147             }
 148             else
 149             {
 150                 // #i102548# create unscaled, unsheared, unrotated and untranslated polygon
 151                 // (unit polygon) by creating the object matrix and back-transforming the polygon
 152                 const basegfx::B2DRange aObjectRange(basegfx::tools::getRange(aUnitPolyPolygon));
 153                 const GeoStat& rGeoStat(GetPathObj().GetGeoStat());
 154                 const double fWidth(aObjectRange.getWidth());
 155                 const double fHeight(aObjectRange.getHeight());
 156                 const double fScaleX(basegfx::fTools::equalZero(fWidth) ? 1.0 : fWidth);
 157                 const double fScaleY(basegfx::fTools::equalZero(fHeight) ? 1.0 : fHeight);
 158
 159                 aObjectMatrix = basegfx::tools::createScaleShearXRotateTranslateB2DHomMatrix(
 160                     fScaleX, fScaleY,
 161                     rGeoStat.nShearAngle ? tan((36000 - rGeoStat.nShearAngle) * F_PI18000) : 0.0,
 162                     rGeoStat.nRotationAngle ? (36000 - rGeoStat.nRotationAngle) * F_PI18000 : 0.0,
 163                     aObjectRange.getMinX(), aObjectRange.getMinY());
 164
 165                 // create unit polygon from object's absolute path
 166                 basegfx::B2DHomMatrix aInverse(aObjectMatrix);
 167                 aInverse.invert();
 168                 aUnitPolyPolygon.transform(aInverse);
 169             }
 170
 171             // create primitive. Always create primitives to allow the decomposition of
 172             // SdrPathPrimitive2D to create needed invisible elements for HitTest and/or BoundRect
 173             const drawinglayer::primitive2d::Primitive2DReference xReference(
 174                 new drawinglayer::primitive2d::SdrPathPrimitive2D(
 175                     aObjectMatrix,
 176                     aAttribute,
 177                     aUnitPolyPolygon));
 178
 179             return drawinglayer::primitive2d::Primitive2DContainer { xReference };
 180         }
 181     } // end of namespace contact
 182 } // end of namespace sdr
 183
 184 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */