1 files changed, 83 insertions, 0 deletions
diff --git a/kviewshell/units.cpp b/kviewshell/units.cpp
new file mode 100644
index 00000000..e675f916
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+++ b/kviewshell/units.cpp
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+// units.cpp
+//
+// Part of KVIEWSHELL - A framework for multipage text/gfx viewers
+//
+// (C) 2003 Stefan Kebekus
+// Distributed under the GPL
+
+// Add header files alphabetically
+
+#include <config.h>
+
+#include <kdebug.h>
+#include <kglobal.h>
+#include <klocale.h>
+#include <math.h>
+#include <qstringlist.h>
+
+#include "units.h"
+
+class unitOfDistance
+{
+ public:
+  float       mmPerUnit;
+  const char* name;
+};
+
+unitOfDistance distanceUnitTable[] = {
+  // Metric units
+  {1.0, "mm"},
+  {1.0, "millimeter"},
+  {10.0, "cm"},
+  {10.0, "centimeter"},
+  {100.0*10.0, "m"},
+  {100.0*10.0, "meter"},
+
+  // Imperial units
+  {25.4, "in"},
+  {25.4, "inch"},
+
+  // Typographical units
+  {2540.0/7227.0, "pt"},  // TeX points. 7227points = 254cm
+  {25.4/72.0, "bp"},      // big points, 1/72 inch as used in Postscript
+  {25.4/6.0, "pc"},       // pica = 1/6 inch
+  {25.4/6.0, "pica"},
+  {25.4*0.0148, "dd"},    // didot points = 0.0148 inches
+  {25.4*0.0148, "didot"},
+  {25.4*0.178, "cc"},     // cicero points = 0.178 inches
+  {25.4*0.178, "cicero"},
+
+  {0.0, 0},
+};
+
+
+
+
+float distance::convertToMM(const QString &distance, bool *ok)
+{
+  //  kdDebug() << "convertToMM( " << distance << " )" << endl;
+
+  float MMperUnit = 0.0;
+  int unitPos = 0; // position of the unit in the string
+
+  // Check for various known units, and store the beginning position
+  // of the unit in 'unitPos', so that distance[0..unitPos] will hold
+  // the value. Store the number of mm per unit in 'MMperUnit'.
+  for(int i=0; MMperUnit==0.0 && distanceUnitTable[i].name != 0; i++) {
+    unitPos = distance.findRev(distanceUnitTable[i].name);
+    if (unitPos != -1)
+      MMperUnit = distanceUnitTable[i].mmPerUnit;
+  }
+
+  // If no unit has been found -> error message, set *ok to false and
+  // return 0.0.
+  if (MMperUnit == 0.0) {
+    kdError() << "distance::convertToMM: no known unit found in the string '" << distance << "'." << endl;
+    if (ok)
+      *ok = false;
+    return 0.0;
+  }
+
+  QString val = distance.left(unitPos).simplifyWhiteSpace();
+  return MMperUnit*val.toFloat(ok);
+}