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76 lines
2.0 KiB
76 lines
2.0 KiB
// -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil; c-brace-offset: 0; -*- |
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// units.cpp |
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// |
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// Part of KVIEWSHELL - A framework for multipage text/gfx viewers |
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// |
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// (C) 2003 Stefan Kebekus |
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// (C) 2006 Wilfried Huss |
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// Distributed under the GPL |
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#include <config.h> |
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#include "length.h" |
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#include "debug_dvi.h" |
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class unitOfDistance |
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{ |
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public: |
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float mmPerUnit; |
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const char* name; |
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}; |
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static const unitOfDistance distanceUnitTable[] = { |
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// Metric units |
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{1.0f, "mm"}, |
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{1.0f, "millimeter"}, |
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{10.0f, "cm"}, |
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{10.0f, "centimeter"}, |
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{float(100.0*10.0), "m"}, |
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{float(100.0*10.0), "meter"}, |
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// Imperial units |
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{25.4f, "in"}, |
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{25.4f, "inch"}, |
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// Typographical units |
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{float(2540.0/7227.0), "pt"}, // TeX points. 7227points = 254cm |
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{float(25.4/72.0), "bp"}, // big points, 1/72 inch as used in Postscript |
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{float(25.4/6.0), "pc"}, // pica = 1/6 inch |
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{float(25.4/6.0), "pica"}, |
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{float(25.4*0.0148), "dd"}, // didot points = 0.0148 inches |
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{float(25.4*0.0148), "didot"}, |
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{float(25.4*0.178), "cc"}, // cicero points = 0.178 inches |
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{float(25.4*0.178), "cicero"}, |
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{0.0f, 0}, |
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}; |
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float Length::convertToMM(const QString &distance, bool *ok) |
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{ |
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float MMperUnit = 0.0; |
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int unitPos = 0; // position of the unit in the string |
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// Check for various known units, and store the beginning position |
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// of the unit in 'unitPos', so that distance[0..unitPos] will hold |
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// the value. Store the number of mm per unit in 'MMperUnit'. |
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for(int i=0; MMperUnit==0.0 && distanceUnitTable[i].name != 0; i++) { |
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unitPos = distance.lastIndexOf(distanceUnitTable[i].name); |
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if (unitPos != -1) |
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MMperUnit = distanceUnitTable[i].mmPerUnit; |
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} |
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// If no unit has been found -> error message, set *ok to false and |
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// return 0.0. |
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if (MMperUnit == 0.0) { |
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qCCritical(OkularDviShellDebug) << "distance::convertToMM: no known unit found in the string '" << distance << "'." << endl; |
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if (ok) |
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*ok = false; |
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return 0.0; |
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} |
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QString val = distance.left(unitPos).simplified(); |
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return MMperUnit*val.toFloat(ok); |
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}
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