diff options
author | Norbert Preining <norbert@preining.info> | 2019-09-02 13:46:59 +0900 |
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committer | Norbert Preining <norbert@preining.info> | 2019-09-02 13:46:59 +0900 |
commit | e0c6872cf40896c7be36b11dcc744620f10adf1d (patch) | |
tree | 60335e10d2f4354b0674ec22d7b53f0f8abee672 /dviware/dvisvgm/src/Length.hpp |
Initial commit
Diffstat (limited to 'dviware/dvisvgm/src/Length.hpp')
-rw-r--r-- | dviware/dvisvgm/src/Length.hpp | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/dviware/dvisvgm/src/Length.hpp b/dviware/dvisvgm/src/Length.hpp new file mode 100644 index 0000000000..4454eec168 --- /dev/null +++ b/dviware/dvisvgm/src/Length.hpp @@ -0,0 +1,92 @@ +/************************************************************************* +** Length.hpp ** +** ** +** This file is part of dvisvgm -- a fast DVI to SVG converter ** +** Copyright (C) 2005-2019 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 <map> +#include <vector> +#include "MessageException.hpp" + +#ifdef IN +#undef IN +#endif + +struct UnitException : MessageException { + explicit UnitException (const std::string &msg) : MessageException(msg) {} +}; + + +class Length { + public: + enum class Unit {PT, BP, CM, MM, IN, PC, DD, CC, SP}; + + public: + constexpr Length () : _pt(0) {} + explicit constexpr Length (long double pt) : _pt(static_cast<double>(pt)) {} + Length (double val, Unit unit) {set(val, unit);} + Length (double val, const std::string &unitstr) {set(val, unitstr);} + explicit 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; + bool operator == (Length len) const {return _pt == len._pt;} + bool operator != (Length len) const {return _pt != len._pt;} + + static Unit stringToUnit (const std::string &unitstr); + static std::string unitToString (Unit unit); + static std::map<std::string,Unit> getUnits (); + + 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) +}; + + +constexpr Length operator "" _pt (long double pt) {return Length(pt);} +constexpr Length operator "" _bp (long double bp) {return Length(bp/Length::pt2bp);} +constexpr Length operator "" _mm (long double mm) {return Length(mm/Length::pt2mm);} +constexpr Length operator "" _in (long double in) {return Length(in/Length::pt2in);} +constexpr Length operator "" _pt (unsigned long long pt) {return Length(static_cast<double>(pt));} +constexpr Length operator "" _bp (unsigned long long bp) {return Length(static_cast<double>(bp)/Length::pt2bp);} +constexpr Length operator "" _mm (unsigned long long mm) {return Length(static_cast<double>(mm)/Length::pt2mm);} +constexpr Length operator "" _in (unsigned long long in) {return Length(static_cast<double>(in)/Length::pt2in);} + +#endif |