sc/source/ui/view/drawutil.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 #include <sal/config.h>
  21
  22 #include <o3tl/unit_conversion.hxx>
  23 #include <vcl/outdev.hxx>
  24
  25 #include <drawutil.hxx>
  26 #include <document.hxx>
  27 #include <viewdata.hxx>
  28
  29 void ScDrawUtil::CalcScale( const ScDocument& rDoc, SCTAB nTab,
  30                             SCCOL nStartCol, SCROW nStartRow, SCCOL nEndCol, SCROW nEndRow,
  31                             const OutputDevice* pDev,
  32                             const Fraction& rZoomX, const Fraction& rZoomY,
  33                             double nPPTX, double nPPTY,
  34                             Fraction& rScaleX, Fraction& rScaleY )
  35 {
  36     tools::Long nPixelX = 0;
  37     tools::Long nTwipsX = 0;
  38     tools::Long nPixelY = 0;
  39     tools::Long nTwipsY = 0;
  40     for (SCCOL i=nStartCol; i<nEndCol; i++)
  41     {
  42         sal_uInt16 nWidth = rDoc.GetColWidth(i,nTab);
  43         nTwipsX += static_cast<tools::Long>(nWidth);
  44         nPixelX += ScViewData::ToPixel( nWidth, nPPTX );
  45     }
  46
  47     for (SCROW nRow = nStartRow; nRow <= nEndRow-1; ++nRow)
  48     {
  49         SCROW nLastRow = nRow;
  50         if (rDoc.RowHidden(nRow, nTab, nullptr, &nLastRow))
  51         {
  52             nRow = nLastRow;
  53             continue;
  54         }
  55
  56         sal_uInt16 nHeight = rDoc.GetRowHeight(nRow, nTab);
  57         nTwipsY += static_cast<tools::Long>(nHeight);
  58         nPixelY += ScViewData::ToPixel(nHeight, nPPTY);
  59     }
  60
  61     MapMode aHMMMode( MapUnit::Map100thMM, Point(), rZoomX, rZoomY );
  62     Point aPixelLog = pDev->PixelToLogic( Point( nPixelX,nPixelY ), aHMMMode );
  63
  64     //  Fraction(double) ctor can be used here (and avoid overflows of PixelLog * Zoom)
  65     //  because ReduceInaccurate is called later anyway.
  66
  67     if ( aPixelLog.X() && nTwipsX )
  68         rScaleX = Fraction( static_cast<double>(aPixelLog.X()) *
  69                             static_cast<double>(rZoomX.GetNumerator()) /
  70                             o3tl::convert<double>(nTwipsX, o3tl::Length::twip, o3tl::Length::mm100) /
  71                             static_cast<double>(rZoomX.GetDenominator()) );
  72     else
  73         rScaleX = Fraction( 1, 1 );
  74
  75     if ( aPixelLog.Y() && nTwipsY )
  76         rScaleY = Fraction( static_cast<double>(aPixelLog.Y()) *
  77                             static_cast<double>(rZoomY.GetNumerator()) /
  78                             o3tl::convert<double>(nTwipsY, o3tl::Length::twip, o3tl::Length::mm100) /
  79                             static_cast<double>(rZoomY.GetDenominator()) );
  80     else
  81         rScaleY = Fraction( 1, 1 );
  82
  83     //  25 bits of accuracy are needed to always hit the right part of
  84     //  cells in the last rows (was 17 before 1M rows).
  85     rScaleX.ReduceInaccurate( 25 );
  86     rScaleY.ReduceInaccurate( 25 );
  87 }
  88
  89 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */