/********************************************************************************
*                                                                               *
*                               S i z e    C l a s s                            *
*                                                                               *
*********************************************************************************
* Copyright (C) 1994,2017 by Jeroen van der Zijp.   All Rights Reserved.        *
*********************************************************************************
* This library is free software; you can redistribute it and/or modify          *
* it under the terms of the GNU Lesser General Public License as published by   *
* the Free Software Foundation; either version 3 of the License, or             *
* (at your option) any later version.                                           *
*                                                                               *
* This library 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 Lesser General Public License for more details.                           *
*                                                                               *
* You should have received a copy of the GNU Lesser General Public License      *
* along with this program.  If not, see <http://www.gnu.org/licenses/>          *
********************************************************************************/
#ifndef FXSIZE_H
#define FXSIZE_H

namespace FX {


/// Size
class FXAPI FXSize {
public:
  FXshort w;
  FXshort h;
public:

  /// Constructors
  FXSize(){ }
  FXSize(const FXSize& s):w(s.w),h(s.h){ }
  FXSize(FXshort ww,FXshort hh):w(ww),h(hh){ }

  /// Return a non-const reference to the ith element
  FXshort& operator[](FXint i){return (&w)[i];}

  /// Return a const reference to the ith element
  const FXshort& operator[](FXint i) const {return (&w)[i];}

  /// Test if empty
  FXbool empty() const { return w<=0 || h<=0; }

  /// Grow by amount
  FXSize& grow(FXshort margin);
  FXSize& grow(FXshort hormargin,FXshort vermargin);
  FXSize& grow(FXshort leftmargin,FXshort rightmargin,FXshort topmargin,FXshort bottommargin);

  /// Shrink by amount
  FXSize& shrink(FXshort margin);
  FXSize& shrink(FXshort hormargin,FXshort vermargin);
  FXSize& shrink(FXshort leftmargin,FXshort rightmargin,FXshort topmargin,FXshort bottommargin);

  /// Assignment
  FXSize& operator=(const FXSize& s){ w=s.w; h=s.h; return *this; }

  /// Set value from another size
  FXSize& set(const FXSize& s){ w=s.w; h=s.h; return *this; }

  /// Set value from components
  FXSize& set(FXshort ww,FXshort hh){ w=ww; h=hh; return *this; }

  /// Assignment operators
  FXSize& operator*=(FXshort c){ w*=c; h*=c; return *this; }
  FXSize& operator/=(FXshort c){ w/=c; h/=c; return *this; }
  FXSize& operator+=(const FXSize& s){ w+=s.w; h+=s.h; return *this; }
  FXSize& operator-=(const FXSize& s){ w-=s.w; h-=s.h; return *this; }

  /// Test if zero
  FXbool operator!() const { return w==0 && h==0; }

  /// Unary
  FXSize operator+() const { return *this; }
  FXSize operator-(){ return FXSize(-w,-h); }
  };


/// Scale operators
inline FXSize operator*(const FXSize& s,FXshort c){ return FXSize(s.w*c,s.h*c); }
inline FXSize operator*(FXshort c,const FXSize& s){ return FXSize(c*s.w,c*s.h); }
inline FXSize operator/(const FXSize& s,FXshort c){ return FXSize(s.w/c,s.h/c); }
inline FXSize operator/(FXshort c,const FXSize& s){ return FXSize(c/s.w,c/s.h); }

/// Addition operators
inline FXSize operator+(const FXSize& a,const FXSize& b){ return FXSize(a.w+b.w,a.h+b.h); }
inline FXSize operator-(const FXSize& a,const FXSize& b){ return FXSize(a.w-b.w,a.h-b.h); }

/// Equality tests
inline FXbool operator==(const FXSize& a,FXshort n){ return a.w==n && a.h==n; }
inline FXbool operator!=(const FXSize& a,FXshort n){ return a.w!=n || a.h!=n; }
inline FXbool operator==(FXshort n,const FXSize& a){ return n==a.w && n==a.h; }
inline FXbool operator!=(FXshort n,const FXSize& a){ return n!=a.w || n!=a.h; }

/// Equality tests
inline FXbool operator==(const FXSize& a,const FXSize& b){ return a.w==b.w && a.h==b.h; }
inline FXbool operator!=(const FXSize& a,const FXSize& b){ return a.w!=b.w || a.h!=b.h; }

/// Inequality tests
inline FXbool operator<(const FXSize& a,FXshort n){ return a.w<n && a.h<n; }
inline FXbool operator<=(const FXSize& a,FXshort n){ return a.w<=n && a.h<=n; }
inline FXbool operator>(const FXSize& a,FXshort n){ return a.w>n && a.h>n; }
inline FXbool operator>=(const FXSize& a,FXshort n){ return a.w>=n && a.h>=n; }

/// Inequality tests
inline FXbool operator<(FXshort n,const FXSize& a){ return n<a.w && n<a.h; }
inline FXbool operator<=(FXshort n,const FXSize& a){ return n<=a.w && n<=a.h; }
inline FXbool operator>(FXshort n,const FXSize& a){ return n>a.w && n>a.h; }
inline FXbool operator>=(FXshort n,const FXSize& a){ return n>=a.w && n>=a.h; }

/// Inequality tests
inline FXbool operator<(const FXSize& a,const FXSize& b){ return a.w<b.w && a.h<b.h; }
inline FXbool operator<=(const FXSize& a,const FXSize& b){ return a.w<=b.w && a.h<=b.h; }
inline FXbool operator>(const FXSize& a,const FXSize& b){ return a.w>b.w && a.h>b.h; }
inline FXbool operator>=(const FXSize& a,const FXSize& b){ return a.w>=b.w && a.h>=b.h; }

/// Lowest or highest components
inline FXSize lo(const FXSize& a,const FXSize& b){ return FXSize(FXMIN(a.w,b.w),FXMIN(a.h,b.h)); }
inline FXSize hi(const FXSize& a,const FXSize& b){ return FXSize(FXMAX(a.w,b.w),FXMAX(a.h,b.h)); }

/// Save object to a stream
extern FXAPI FXStream& operator<<(FXStream& store,const FXSize& s);

/// Load object from a stream
extern FXAPI FXStream& operator>>(FXStream& store,FXSize& s);

}

#endif
