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/*************************************************************************
** Length.hpp **
** **
** This file is part of dvisvgm -- a fast DVI to SVG converter **
** Copyright (C) 2005-2017 Martin Gieseking <martin.gieseking@uos.de> **
** **
** This program is free software; you can redistribute it and/or **
** modify it under the terms of the GNU General Public License as **
** published by the Free Software Foundation; either version 3 of **
** the License, or (at your option) any later version. **
** **
** This program 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 General Public License for more details. **
** **
** You should have received a copy of the GNU General Public License **
** along with this program; if not, see <http://www.gnu.org/licenses/>. **
*************************************************************************/
#ifndef LENGTH_HPP
#define LENGTH_HPP
#include <string>
#include "MessageException.hpp"
#ifdef IN
#undef IN
#endif
struct UnitException : MessageException
{
UnitException (const std::string &msg) : MessageException(msg) {}
};
class Length
{
public:
enum class Unit {PT, BP, CM, MM, IN, PC, DD, CC, SP};
public:
Length () : _pt(0) {}
Length (double val, Unit unit=Unit::PT) {set(val, unit);}
Length (double val, const std::string &unitstr) {set(val, unitstr);}
Length (const std::string &lenstr) {set(lenstr);}
void set (double val, Unit unit);
void set (double val, std::string unit);
void set (const std::string &lenstr);
double pt () const {return _pt;}
double in () const {return _pt*pt2in;}
double bp () const {return _pt*pt2bp;}
double cm () const {return _pt*pt2cm;}
double mm () const {return _pt*pt2mm;}
double pc () const {return _pt*pt2pc;}
double dd () const {return _pt*pt2dd;}
double cc () const {return _pt*pt2cc;}
double sp () const {return _pt*pt2sp;}
double get (Unit unit) const;
std::string toString (Unit unit) const;
static Unit stringToUnit (const std::string &unitstr);
static std::string unitToString (Unit unit);
public:
static constexpr double pt2in = 1.0/72.27;
static constexpr double pt2bp = pt2in*72;
static constexpr double pt2cm = pt2in*2.54;
static constexpr double pt2mm = pt2cm*10;
static constexpr double pt2pc = 1.0/12;
static constexpr double pt2dd = 1157.0/1238;
static constexpr double pt2cc = pt2dd/12;
static constexpr double pt2sp = 65536.0;
private:
double _pt; // length in TeX point units (72.27pt = 1in)
};
#endif
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