sc/source/ui/view/gridmerg.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 <vcl/outdev.hxx>
  21
  22 #include "gridmerg.hxx"
  23
  24 ScGridMerger::ScGridMerger( OutputDevice* pOutDev, long nOnePixelX, long nOnePixelY )
  25     : pDev(pOutDev)
  26     , nOneX(nOnePixelX)
  27     , nOneY(nOnePixelY)
  28     , nFixStart(0)
  29     , nFixEnd(0)
  30     , nVarStart(0)
  31     , nVarDiff(0)
  32     , nCount(0)
  33     , bVertical(false)
  34 {
  35     //  optimize (DrawGrid) only for pixel MapMode,
  36     //  to avoid rounding errors
  37
  38     bOptimize = ( pDev->GetMapMode().GetMapUnit() == MAP_PIXEL );
  39 }
  40
  41 ScGridMerger::~ScGridMerger()
  42 {
  43     Flush();
  44 }
  45
  46 void ScGridMerger::AddLine( long nStart, long nEnd, long nPos )
  47 {
  48     if ( nCount )
  49     {
  50         //  not first line - test fix position
  51         //  more than one previous line - test distance
  52
  53         if ( nStart != nFixStart || nEnd != nFixEnd )
  54         {
  55             if ( nCount == 1 && nPos == nVarStart &&
  56                     ( nStart == nFixEnd ||
  57                         nStart == nFixEnd + ( bVertical ? nOneY : nOneX ) ) )
  58             {
  59                 //  additional optimization: extend connected lines
  60                 //  keep nCount at 1
  61                 nFixEnd = nEnd;
  62             }
  63             else
  64                 Flush();
  65         }
  66         else if ( nCount == 1 )
  67         {
  68             nVarDiff = nPos - nVarStart;
  69             ++nCount;
  70         }
  71         else if ( nPos != nVarStart + nCount * nVarDiff )       //! keep VarEnd?
  72             Flush();
  73         else
  74             ++nCount;
  75     }
  76
  77     if ( !nCount )
  78     {
  79         //  first line (or flushed above) - just store
  80
  81         nFixStart = nStart;
  82         nFixEnd   = nEnd;
  83         nVarStart = nPos;
  84         nVarDiff  = 0;
  85         nCount    = 1;
  86     }
  87 }
  88
  89 void ScGridMerger::AddHorLine( long nX1, long nX2, long nY )
  90 {
  91     if ( bOptimize )
  92     {
  93         if ( bVertical )
  94         {
  95             Flush();
  96             bVertical = false;
  97         }
  98         AddLine( nX1, nX2, nY );
  99     }
 100     else
 101         pDev->DrawLine( Point( nX1, nY ), Point( nX2, nY ) );
 102 }
 103
 104 void ScGridMerger::AddVerLine( long nX, long nY1, long nY2 )
 105 {
 106     if ( bOptimize )
 107     {
 108         if ( !bVertical )
 109         {
 110             Flush();
 111             bVertical = true;
 112         }
 113         AddLine( nY1, nY2, nX );
 114     }
 115     else
 116         pDev->DrawLine( Point( nX, nY1 ), Point( nX, nY2 ) );
 117 }
 118
 119 void ScGridMerger::Flush()
 120 {
 121     if (nCount)
 122     {
 123         if (bVertical)
 124         {
 125             if ( nCount == 1 )
 126                 pDev->DrawLine( Point( nVarStart, nFixStart ), Point( nVarStart, nFixEnd ) );
 127             else
 128             {
 129                 long nVarEnd = nVarStart + ( nCount - 1 ) * nVarDiff;
 130                 if ( nVarDiff < 0 )
 131                 {
 132                     //  nVarDiff is negative in RTL layout mode
 133                     //  Change the positions so DrawGrid is called with a positive distance
 134                     //  (nVarStart / nVarDiff can be modified, aren't used after Flush)
 135
 136                     nVarDiff = -nVarDiff;
 137                     long nTemp = nVarStart;
 138                     nVarStart = nVarEnd;
 139                     nVarEnd = nTemp;
 140                 }
 141                 pDev->DrawGrid( Rectangle( nVarStart, nFixStart, nVarEnd, nFixEnd ),
 142                                 Size( nVarDiff, nFixEnd - nFixStart ),
 143                                 DrawGridFlags::VertLines );
 144             }
 145         }
 146         else
 147         {
 148             if ( nCount == 1 )
 149                 pDev->DrawLine( Point( nFixStart, nVarStart ), Point( nFixEnd, nVarStart ) );
 150             else
 151             {
 152                 long nVarEnd = nVarStart + ( nCount - 1 ) * nVarDiff;
 153                 pDev->DrawGrid( Rectangle( nFixStart, nVarStart, nFixEnd, nVarEnd ),
 154                                 Size( nFixEnd - nFixStart, nVarDiff ),
 155                                 DrawGridFlags::HorzLines );
 156             }
 157         }
 158         nCount = 0;
 159     }
 160 }
 161
 162 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */