File indexing completed on 2024-05-12 04:33:58

 // -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil; c-brace-offset: 0; -*-
 // units.cpp
 //
 // Part of KVIEWSHELL - A framework for multipage text/gfx viewers
 //
 // SPDX-FileCopyrightText: 2003 Stefan Kebekus
 // SPDX-FileCopyrightText: 2006 Wilfried Huss
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <config.h>
 
 #include "debug_dvi.h"
 #include "length.h"
 
 class unitOfDistance
 {
 public:
     float mmPerUnit;
     const char *name;
 };
 
 static const unitOfDistance distanceUnitTable[] = {
     // Metric units
     {1.0f, "mm"},
     {1.0f, "millimeter"},
     {10.0f, "cm"},
     {10.0f, "centimeter"},
     {float(100.0 * 10.0), "m"},
     {float(100.0 * 10.0), "meter"},
 
     // Imperial units
     {25.4f, "in"},
     {25.4f, "inch"},
 
     // Typographical units
     {float(2540.0 / 7227.0), "pt"}, // TeX points. 7227points = 254cm
     {float(25.4 / 72.0), "bp"},     // big points, 1/72 inch as used in Postscript
     {float(25.4 / 6.0), "pc"},      // pica = 1/6 inch
     {float(25.4 / 6.0), "pica"},
     {float(25.4 * 0.0148), "dd"}, // didot points = 0.0148 inches
     {float(25.4 * 0.0148), "didot"},
     {float(25.4 * 0.178), "cc"}, // cicero points = 0.178 inches
     {float(25.4 * 0.178), "cicero"},
 
     {0.0f, nullptr},
 };
 
 float Length::convertToMM(const QString &distance, bool *ok)
 {
     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 != nullptr; i++) {
         unitPos = distance.lastIndexOf(QString::fromLocal8Bit(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) {
         qCCritical(OkularDviShellDebug) << "distance::convertToMM: no known unit found in the string '" << distance << "'.";
         if (ok) {
             *ok = false;
         }
         return 0.0;
     }
 
     QString val = distance.left(unitPos).simplified();
     return MMperUnit * val.toFloat(ok);
 }