src/graphics/GraphicsParams.cpp

   1 /**
   2  * \file GraphicsParams.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Angus Leeming
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include "GraphicsParams.h"
  14
  15 #include "Length.h"
  16
  17 #include <cstdlib>
  18 #include <sstream>
  19
  20 using namespace std;
  21
  22 namespace lyx {
  23 namespace graphics {
  24
  25 Params::Params()
  26         : display(true),
  27           scale(100),
  28           angle(0)
  29 {}
  30
  31
  32 bool operator==(Params const & a, Params const & b)
  33 {
  34         return (a.filename == b.filename &&
  35                 a.display == b.display &&
  36                 a.bb == b.bb &&
  37                 a.scale == b.scale &&
  38                 a.angle == b.angle);
  39 }
  40
  41
  42 bool operator!=(Params const & a, Params const & b)
  43 {
  44         return !(a == b);
  45 }
  46
  47
  48 ostream & operator<<(ostream & os, BoundingBox const & bb)
  49 {
  50         os << bb.xl << ' ' << bb.yb << ' ' << bb.xr << ' ' << bb.yt;
  51         return os;
  52 }
  53
  54
  55 BoundingBox::BoundingBox()
  56         : xl(0), yb(0), xr(0), yt(0)
  57 {}
  58
  59
  60 BoundingBox::BoundingBox(string const & bb)
  61         : xl(0), yb(0), xr(0), yt(0)
  62 {
  63         if (bb.empty())
  64                 return;
  65
  66         istringstream is(bb.c_str());
  67         string a, b, c, d;
  68         is >> a >> b >> c >> d;
  69
  70         // inBP returns the length in Postscript points.
  71         // Note further that there are 72 Postscript pixels per inch.
  72         unsigned int const xl_tmp = abs(Length(a).inBP());
  73         unsigned int const yb_tmp = abs(Length(b).inBP());
  74         unsigned int const xr_tmp = abs(Length(c).inBP());
  75         unsigned int const yt_tmp = abs(Length(d).inBP());
  76
  77         if (xr_tmp <= xl_tmp || yt_tmp <= yb_tmp)
  78                 return;
  79
  80         xl = xl_tmp;
  81         yb = yb_tmp;
  82         xr = xr_tmp;
  83         yt = yt_tmp;
  84 }
  85
  86
  87 bool BoundingBox::empty() const
  88 {
  89         return (!xl && !yb && !xr && !yt);
  90 }
  91
  92
  93 bool operator==(BoundingBox const & a, BoundingBox const & b)
  94 {
  95         return (a.xl == b.xl &&
  96                 a.yb == b.yb &&
  97                 a.xr == b.xr &&
  98                 a.yt == b.yt);
  99 }
 100
 101
 102 bool operator!=(BoundingBox const & a, BoundingBox const & b)
 103 {
 104         return !(a == b);
 105 }
 106
 107 } // namespace graphics
 108 } // namespace lyx