1 files changed, 118 insertions, 0 deletions
diff --git a/sc/source/ui/view/drawutil.cxx b/sc/source/ui/view/drawutil.cxx
new file mode 100644
index 000000000000..54b4ef95dd83
--- /dev/null
+++ b/sc/source/ui/view/drawutil.cxx
@@ -0,0 +1,118 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+// MARKER(update_precomp.py): autogen include statement, do not remove
+#include "precompiled_sc.hxx"
+
+
+
+// INCLUDE ---------------------------------------------------------------
+
+#include <vcl/outdev.hxx>
+
+#include "drawutil.hxx"
+#include "document.hxx"
+#include "global.hxx"
+#include "viewdata.hxx"
+
+// STATIC DATA -----------------------------------------------------------
+
+// -----------------------------------------------------------------------
+
+
+inline Fraction MakeFraction( long nA, long nB )
+{
+    return ( nA && nB ) ? Fraction(nA,nB) : Fraction(1,1);
+}
+
+void ScDrawUtil::CalcScale( ScDocument* pDoc, SCTAB nTab,
+                            SCCOL nStartCol, SCROW nStartRow, SCCOL nEndCol, SCROW nEndRow,
+                            OutputDevice* pDev,
+                            const Fraction& rZoomX, const Fraction& rZoomY,
+                            double nPPTX, double nPPTY,
+                            Fraction& rScaleX, Fraction& rScaleY )
+{
+    long nPixelX = 0;
+    long nTwipsX = 0;
+    long nPixelY = 0;
+    long nTwipsY = 0;
+    for (SCCOL i=nStartCol; i<nEndCol; i++)
+    {
+        sal_uInt16 nWidth = pDoc->GetColWidth(i,nTab);
+        nTwipsX += (long) nWidth;
+        nPixelX += ScViewData::ToPixel( nWidth, nPPTX );
+    }
+
+    for (SCROW nRow = nStartRow; nRow <= nEndRow-1; ++nRow)
+    {
+        SCROW nLastRow = nRow;
+        if (pDoc->RowHidden(nRow, nTab, NULL, &nLastRow))
+        {
+            nRow = nLastRow;
+            continue;
+        }
+
+        sal_uInt16 nHeight = pDoc->GetRowHeight(nRow, nTab);
+        nTwipsY += static_cast<long>(nHeight);
+        nPixelY += ScViewData::ToPixel(nHeight, nPPTY);
+    }
+
+    MapMode aHMMMode( MAP_100TH_MM, Point(), rZoomX, rZoomY );
+    Point aPixelLog = pDev->PixelToLogic( Point( nPixelX,nPixelY ), aHMMMode );
+
+    //  Fraction(double) ctor can be used here (and avoid overflows of PixelLog * Zoom)
+    //  because ReduceInaccurate is called later anyway.
+
+    if ( aPixelLog.X() && nTwipsX )
+        rScaleX = Fraction( ((double)aPixelLog.X()) *
+                            ((double)rZoomX.GetNumerator()) /
+                            ((double)nTwipsX) /
+                            ((double)HMM_PER_TWIPS) /
+                            ((double)rZoomX.GetDenominator()) );
+    else
+        rScaleX = Fraction( 1, 1 );
+
+    if ( aPixelLog.Y() && nTwipsY )
+        rScaleY = Fraction( ((double)aPixelLog.Y()) *
+                            ((double)rZoomY.GetNumerator()) /
+                            ((double)nTwipsY) /
+                            ((double)HMM_PER_TWIPS) /
+                            ((double)rZoomY.GetDenominator()) );
+    else
+        rScaleY = Fraction( 1, 1 );
+
+    //  25 bits of accuracy are needed to always hit the right part of
+    //  cells in the last rows (was 17 before 1M rows).
+    rScaleX.ReduceInaccurate( 25 );
+    rScaleY.ReduceInaccurate( 25 );
+}
+
+
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */