length.h

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/*
 * LibrePCB - Professional EDA for everyone!
 * Copyright (C) 2013 LibrePCB Developers, see AUTHORS.md for contributors.
 * https://librepcb.org/
 *
 * 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 LIBREPCB_LENGTH_H
#define LIBREPCB_LENGTH_H

/*******************************************************************************
 *  Includes
 ******************************************************************************/
#include "../fileio/sexpression.h"

#include <type_safe/constrained_type.hpp>

#include <QtCore>

/*******************************************************************************
 *  Namespace / Forward Declarations
 ******************************************************************************/
namespace librepcb {

/*******************************************************************************
 *  Typedefs
 ******************************************************************************/

#ifdef USE_32BIT_LENGTH_UNITS
typedef qint32 LengthBase_t;
#else
typedef qint64 LengthBase_t;
#endif

/*******************************************************************************
 *  Class Length
 ******************************************************************************/

class Length {
  Q_DECLARE_TR_FUNCTIONS(Length)

public:
  //  Constructors / Destructor

  constexpr Length() noexcept : Length(0) {}

  constexpr Length(const Length& length) noexcept
    : mNanometers(length.mNanometers) {}

  constexpr Length(LengthBase_t nanometers) noexcept
    : mNanometers(nanometers) {}

  ~Length() = default;

  // Setters

  void setLengthNm(LengthBase_t nanometers) noexcept {
    mNanometers = nanometers;
  }

  void setLengthMm(qreal millimeters) { setLengthFromFloat(millimeters * 1e6); }

  void setLengthMm(const QString& millimeters) {
    mNanometers = mmStringToNm(millimeters);
  }

  void setLengthInch(qreal inches) { setLengthFromFloat(inches * sNmPerInch); }

  void setLengthMil(qreal mils) { setLengthFromFloat(mils * sNmPerMil); }

  void setLengthPx(qreal pixels) { setLengthFromFloat(pixels * sNmPerPixel); }

  // Conversions

  LengthBase_t toNm() const noexcept { return mNanometers; }

  QString toNmString() const noexcept { return QString::number(toNm()); }

  qreal toMm() const noexcept { return (qreal)mNanometers / 1e6; }

  QString toMmString() const noexcept;

  qreal toInch() const noexcept { return (qreal)mNanometers / sNmPerInch; }

  qreal toMil() const noexcept { return (qreal)mNanometers / sNmPerMil; }

  qreal toPx() const noexcept { return mNanometers * sPixelsPerNm; }

  // General Methods

  Length abs() const noexcept;

  Length& makeAbs() noexcept;

  Length mappedToGrid(const Length& gridInterval) const noexcept;

  Length& mapToGrid(const Length& gridInterval) noexcept;

  Length scaled(qreal factor) const noexcept;

  Length& scale(qreal factor) noexcept;

  // Static Functions

  static Length fromMm(qreal millimeters,
                       const Length& gridInterval = Length(0));

  static Length fromMm(const QString& millimeters,
                       const Length& gridInterval = Length(0));

  static Length fromInch(qreal inches, const Length& gridInterval = Length(0));

  static Length fromMil(qreal mils, const Length& gridInterval = Length(0));

  static Length fromPx(qreal pixels, const Length& gridInterval = Length(0));

  static Length min() noexcept;

  static Length max() noexcept;

  // Operators
  Length& operator=(const Length& rhs) {
    mNanometers = rhs.mNanometers;
    return *this;
  }
  Length& operator+=(const Length& rhs) {
    mNanometers += rhs.mNanometers;
    return *this;
  }
  Length& operator-=(const Length& rhs) {
    mNanometers -= rhs.mNanometers;
    return *this;
  }
  Length& operator*=(const Length& rhs) {
    mNanometers *= rhs.mNanometers;
    return *this;
  }
  Length& operator*=(LengthBase_t rhs) {
    mNanometers *= rhs;
    return *this;
  }
  Length& operator/=(const Length& rhs) {
    mNanometers /= rhs.mNanometers;
    return *this;
  }
  Length& operator/=(LengthBase_t rhs) {
    mNanometers /= rhs;
    return *this;
  }
  Length operator+(const Length& rhs) const {
    return Length(mNanometers + rhs.mNanometers);
  }
  Length operator-() const { return Length(-mNanometers); }
  Length operator-(const Length& rhs) const {
    return Length(mNanometers - rhs.mNanometers);
  }
  Length operator*(const Length& rhs) const {
    return Length(mNanometers * rhs.mNanometers);
  }
  Length operator*(LengthBase_t rhs) const { return Length(mNanometers * rhs); }
  Length operator/(const Length& rhs) const {
    return Length(mNanometers / rhs.mNanometers);
  }
  Length operator/(LengthBase_t rhs) const { return Length(mNanometers / rhs); }
  Length operator%(const Length& rhs) const {
    return Length(mNanometers % rhs.mNanometers);
  }
  constexpr bool operator>(const Length& rhs) const {
    return mNanometers > rhs.mNanometers;
  }
  constexpr bool operator>(LengthBase_t rhs) const { return mNanometers > rhs; }
  constexpr bool operator<(const Length& rhs) const {
    return mNanometers < rhs.mNanometers;
  }
  constexpr bool operator<(LengthBase_t rhs) const { return mNanometers < rhs; }
  constexpr bool operator>=(const Length& rhs) const {
    return mNanometers >= rhs.mNanometers;
  }
  constexpr bool operator>=(LengthBase_t rhs) const {
    return mNanometers >= rhs;
  }
  constexpr bool operator<=(const Length& rhs) const {
    return mNanometers <= rhs.mNanometers;
  }
  constexpr bool operator<=(LengthBase_t rhs) const {
    return mNanometers <= rhs;
  }
  constexpr bool operator==(const Length& rhs) const {
    return mNanometers == rhs.mNanometers;
  }
  constexpr bool operator==(LengthBase_t rhs) const {
    return mNanometers == rhs;
  }
  constexpr bool operator!=(const Length& rhs) const {
    return mNanometers != rhs.mNanometers;
  }
  constexpr bool operator!=(LengthBase_t rhs) const {
    return mNanometers != rhs;
  }

private:
  // Private Functions

  void setLengthFromFloat(qreal nanometers);

  // Private Static Functions

  static LengthBase_t mapNmToGrid(LengthBase_t nanometers,
                                  const Length& gridInterval) noexcept;

  static LengthBase_t mmStringToNm(const QString& millimeters);

  // Private Member Variables
  LengthBase_t mNanometers;  

  // Static Length Converting Constants
  static constexpr LengthBase_t sNmPerInch = 25400000;  
  static constexpr LengthBase_t sNmPerMil = 25400;  
  static constexpr LengthBase_t sPixelsPerInch =
      72;  
  static constexpr qreal sNmPerPixel = (qreal)sNmPerInch / sPixelsPerInch;
  static constexpr qreal sPixelsPerNm = (qreal)sPixelsPerInch / sNmPerInch;
};

/*******************************************************************************
 *  Non-Member Functions
 ******************************************************************************/

template <>
inline SExpression serialize(const Length& obj) {
  return SExpression::createToken(obj.toMmString());
}

template <>
inline Length deserialize(const SExpression& sexpr, const Version& fileFormat) {
  Q_UNUSED(fileFormat);
  return Length::fromMm(sexpr.getValue());
}

inline QDataStream& operator<<(QDataStream& stream, const Length& length) {
  stream << length.toMm();
  return stream;
}

inline QDebug operator<<(QDebug stream, const Length& length) {
  stream << QString("Length(%1mm)").arg(length.toMm());
  return stream;
}

inline uint qHash(const Length& key, uint seed = 0) noexcept {
  return ::qHash(key.toNm(), seed);
}

/*******************************************************************************
 *  Class UnsignedLength
 ******************************************************************************/

struct UnsignedLengthVerifier {
  template <typename Value, typename Predicate>
  static constexpr auto verify(Value&& val, const Predicate& p) ->
      typename std::decay<Value>::type {
    return p(val) ? std::forward<Value>(val)
                  : (throw RuntimeError(__FILE__, __LINE__,
                                        Length::tr("Value must be >= 0!")),
                     std::forward<Value>(val));
  }
};

struct UnsignedLengthConstraint {
  constexpr bool operator()(const Length& l) const noexcept { return l >= 0; }
};

using UnsignedLength =
    type_safe::constrained_type<Length, UnsignedLengthConstraint,
                                UnsignedLengthVerifier>;

inline UnsignedLength operator+(const UnsignedLength& lhs,
                                const UnsignedLength& rhs) noexcept {
  return UnsignedLength(*lhs +
                        *rhs);  // will not throw as long as there's no overflow
}

inline UnsignedLength& operator+=(UnsignedLength& lhs,
                                  const UnsignedLength& rhs) noexcept {
  lhs = lhs + rhs;  // will not throw as long as there's no overflow
  return lhs;
}

inline Length operator*(const UnsignedLength& lhs, LengthBase_t rhs) noexcept {
  return (*lhs) * rhs;
}
inline Length operator/(const UnsignedLength& lhs, LengthBase_t rhs) noexcept {
  return (*lhs) / rhs;
}
inline Length operator+(const Length& lhs, const UnsignedLength& rhs) noexcept {
  return lhs + *rhs;
}
inline Length operator+(const UnsignedLength& lhs, const Length& rhs) noexcept {
  return *lhs + rhs;
}
inline Length operator-(const Length& lhs, const UnsignedLength& rhs) noexcept {
  return lhs - *rhs;
}
inline Length operator-(const UnsignedLength& lhs, const Length& rhs) noexcept {
  return *lhs - rhs;
}
inline Length operator-(const UnsignedLength& lhs) noexcept {
  return -(*lhs);
}
inline bool operator>(const UnsignedLength& lhs, const Length& rhs) noexcept {
  return (*lhs) > rhs;
}
inline bool operator>(const UnsignedLength& lhs, LengthBase_t rhs) noexcept {
  return (*lhs) > rhs;
}
inline bool operator>=(const UnsignedLength& lhs, const Length& rhs) noexcept {
  return (*lhs) >= rhs;
}
inline bool operator>=(const UnsignedLength& lhs, LengthBase_t rhs) noexcept {
  return (*lhs) >= rhs;
}
inline bool operator<(const UnsignedLength& lhs, const Length& rhs) noexcept {
  return (*lhs) <= rhs;
}
inline bool operator<(const UnsignedLength& lhs, LengthBase_t rhs) noexcept {
  return (*lhs) <= rhs;
}
inline bool operator==(const UnsignedLength& lhs, const Length& rhs) noexcept {
  return (*lhs) == rhs;
}
inline bool operator==(const UnsignedLength& lhs, LengthBase_t rhs) noexcept {
  return (*lhs) == rhs;
}
inline bool operator!=(const UnsignedLength& lhs, const Length& rhs) noexcept {
  return (*lhs) != rhs;
}
inline bool operator!=(const UnsignedLength& lhs, LengthBase_t rhs) noexcept {
  return (*lhs) != rhs;
}

template <>
inline SExpression serialize(const UnsignedLength& obj) {
  return SExpression::createToken(obj->toMmString());
}

template <>
inline UnsignedLength deserialize(const SExpression& sexpr,
                                  const Version& fileFormat) {
  return UnsignedLength(deserialize<Length>(sexpr, fileFormat));  // can throw
}

inline QDataStream& operator<<(QDataStream& stream,
                               const UnsignedLength& length) {
  stream << length->toMm();
  return stream;
}

inline QDebug operator<<(QDebug stream, const UnsignedLength& length) {
  stream << QString("UnsignedLength(%1mm)").arg(length->toMm());
  return stream;
}

inline uint qHash(const UnsignedLength& key, uint seed = 0) noexcept {
  return ::qHash(key->toNm(), seed);
}

/*******************************************************************************
 *  Class PositiveLength
 ******************************************************************************/

struct PositiveLengthVerifier {
  template <typename Value, typename Predicate>
  static constexpr auto verify(Value&& val, const Predicate& p) ->
      typename std::decay<Value>::type {
    return p(val) ? std::forward<Value>(val)
                  : (throw RuntimeError(__FILE__, __LINE__,
                                        Length::tr("Value must be > 0!")),
                     std::forward<Value>(val));
  }
};

struct PositiveLengthConstraint {
  constexpr bool operator()(const Length& l) const noexcept { return l > 0; }
};

using PositiveLength =
    type_safe::constrained_type<Length, PositiveLengthConstraint,
                                PositiveLengthVerifier>;

inline UnsignedLength positiveToUnsigned(const PositiveLength& l) noexcept {
  return UnsignedLength(*l);
}

inline PositiveLength operator+(const PositiveLength& lhs,
                                const PositiveLength& rhs) noexcept {
  return PositiveLength(*lhs +
                        *rhs);  // will not throw as long as there's no overflow
}

inline PositiveLength operator+(const PositiveLength& lhs,
                                const UnsignedLength& rhs) noexcept {
  return PositiveLength(*lhs +
                        *rhs);  // will not throw as long as there's no overflow
}

inline PositiveLength operator+(const UnsignedLength& lhs,
                                const PositiveLength& rhs) noexcept {
  return PositiveLength(*lhs +
                        *rhs);  // will not throw as long as there's no overflow
}

inline PositiveLength& operator+=(PositiveLength& lhs,
                                  const PositiveLength& rhs) noexcept {
  lhs = lhs + rhs;  // will not throw as long as there's no overflow
  return lhs;
}

inline PositiveLength& operator+=(PositiveLength& lhs,
                                  const UnsignedLength& rhs) noexcept {
  lhs = lhs + rhs;  // will not throw as long as there's no overflow
  return lhs;
}

inline UnsignedLength& operator+=(UnsignedLength& lhs,
                                  const PositiveLength& rhs) noexcept {
  lhs = positiveToUnsigned(
      lhs + rhs);  // will not throw as long as there's no overflow
  return lhs;
}

inline Length operator*(const PositiveLength& lhs, LengthBase_t rhs) noexcept {
  return (*lhs) * rhs;
}
inline Length operator/(const PositiveLength& lhs, LengthBase_t rhs) noexcept {
  return (*lhs) / rhs;
}
inline Length operator+(const Length& lhs, const PositiveLength& rhs) noexcept {
  return lhs + *rhs;
}
inline Length operator+(const PositiveLength& lhs, const Length& rhs) noexcept {
  return *lhs + rhs;
}
inline Length operator-(const Length& lhs, const PositiveLength& rhs) noexcept {
  return lhs - *rhs;
}
inline Length operator-(const PositiveLength& lhs, const Length& rhs) noexcept {
  return *lhs - rhs;
}
inline Length operator-(const UnsignedLength& lhs,
                        const PositiveLength& rhs) noexcept {
  return *lhs - *rhs;
}
inline Length operator-(const PositiveLength& lhs,
                        const UnsignedLength& rhs) noexcept {
  return *lhs - *rhs;
}
inline Length operator-(const PositiveLength& lhs) noexcept {
  return -(*lhs);
}
inline bool operator>(const UnsignedLength& lhs,
                      const PositiveLength& rhs) noexcept {
  return (*lhs) > (*rhs);
}
inline bool operator>(const PositiveLength& lhs,
                      const UnsignedLength& rhs) noexcept {
  return (*lhs) > (*rhs);
}
inline bool operator>(const PositiveLength& lhs, const Length& rhs) noexcept {
  return (*lhs) > rhs;
}
inline bool operator>(const PositiveLength& lhs, LengthBase_t rhs) noexcept {
  return (*lhs) > rhs;
}
inline bool operator>=(const UnsignedLength& lhs,
                       const PositiveLength& rhs) noexcept {
  return (*lhs) >= (*rhs);
}
inline bool operator>=(const PositiveLength& lhs,
                       const UnsignedLength& rhs) noexcept {
  return (*lhs) >= (*rhs);
}
inline bool operator>=(const PositiveLength& lhs, const Length& rhs) noexcept {
  return (*lhs) >= rhs;
}
inline bool operator>=(const PositiveLength& lhs, LengthBase_t rhs) noexcept {
  return (*lhs) >= rhs;
}
inline bool operator<(const UnsignedLength& lhs,
                      const PositiveLength& rhs) noexcept {
  return (*lhs) < (*rhs);
}
inline bool operator<(const PositiveLength& lhs,
                      const UnsignedLength& rhs) noexcept {
  return (*lhs) < (*rhs);
}
inline bool operator<(const PositiveLength& lhs, const Length& rhs) noexcept {
  return (*lhs) <= rhs;
}
inline bool operator<(const PositiveLength& lhs, LengthBase_t rhs) noexcept {
  return (*lhs) <= rhs;
}
inline bool operator==(const UnsignedLength& lhs,
                       const PositiveLength& rhs) noexcept {
  return (*lhs) == (*rhs);
}
inline bool operator==(const PositiveLength& lhs,
                       const UnsignedLength& rhs) noexcept {
  return (*lhs) == (*rhs);
}
inline bool operator==(const PositiveLength& lhs, const Length& rhs) noexcept {
  return (*lhs) == rhs;
}
inline bool operator==(const PositiveLength& lhs, LengthBase_t rhs) noexcept {
  return (*lhs) == rhs;
}
inline bool operator!=(const UnsignedLength& lhs,
                       const PositiveLength& rhs) noexcept {
  return (*lhs) != (*rhs);
}
inline bool operator!=(const PositiveLength& lhs,
                       const UnsignedLength& rhs) noexcept {
  return (*lhs) != (*rhs);
}
inline bool operator!=(const PositiveLength& lhs, const Length& rhs) noexcept {
  return (*lhs) != rhs;
}
inline bool operator!=(const PositiveLength& lhs, LengthBase_t rhs) noexcept {
  return (*lhs) != rhs;
}

template <>
inline SExpression serialize(const PositiveLength& obj) {
  return SExpression::createToken(obj->toMmString());
}

template <>
inline PositiveLength deserialize(const SExpression& sexpr,
                                  const Version& fileFormat) {
  return PositiveLength(deserialize<Length>(sexpr, fileFormat));  // can throw
}

inline QDataStream& operator<<(QDataStream& stream,
                               const PositiveLength& length) {
  stream << length->toMm();
  return stream;
}

inline QDebug operator<<(QDebug stream, const PositiveLength& length) {
  stream << QString("PositiveLength(%1mm)").arg(length->toMm());
  return stream;
}

inline uint qHash(const PositiveLength& key, uint seed = 0) noexcept {
  return ::qHash(key->toNm(), seed);
}

/*******************************************************************************
 *  End of File
 ******************************************************************************/

}  // namespace librepcb

Q_DECLARE_METATYPE(librepcb::Length)

#endif  // LIBREPCB_LENGTH_H