lily/box.cc

   1 /*
   2   box.cc -- implement Box
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1996--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include "box.hh"
  10
  11 void
  12 Box::translate (Offset o)
  13 {
  14   for (Axis i = X_AXIS; i < NO_AXES; incr (i))
  15     interval_a_[i] += o[i];
  16 }
  17
  18 void
  19 Box::unite (Box b)
  20 {
  21   for (Axis i = X_AXIS; i < NO_AXES; incr (i))
  22     interval_a_[i].unite (b[i]);
  23 }
  24
  25 Box::Box ()
  26 {
  27 }
  28
  29 void
  30 Box::set_empty ()
  31 {
  32   interval_a_[X_AXIS].set_empty ();
  33   interval_a_[Y_AXIS].set_empty ();
  34 }
  35
  36 Box::Box (Interval ix, Interval iy)
  37 {
  38   x () = ix;
  39   y () = iy;
  40 }
  41
  42 Interval &
  43 Box::operator [] (Axis a)
  44 {
  45   return interval_a_[a];
  46 }
  47
  48 Interval
  49 Box::operator [] (Axis a) const
  50 {
  51   return interval_a_[a];
  52 }
  53
  54 void
  55 Box::scale (Real s)
  56 {
  57   interval_a_[X_AXIS] *= s;
  58   interval_a_[Y_AXIS] *= s;
  59 }
  60
  61 void
  62 Box::add_point (Offset o)
  63 {
  64   interval_a_[X_AXIS].add_point (o[X_AXIS]);
  65   interval_a_[Y_AXIS].add_point (o[Y_AXIS]);
  66 }
  67
  68 Offset
  69 Box::center () const
  70 {
  71   return Offset (interval_a_[X_AXIS].center (),
  72                  interval_a_[Y_AXIS].center ());
  73 }
  74
  75 void
  76 Box::widen (Real x, Real y)
  77 {
  78   interval_a_[X_AXIS].widen (x);
  79   interval_a_[Y_AXIS].widen (y);
  80 }
  81
  82 /****************************************************************/
  83
  84 #include "ly-smobs.icc"
  85
  86 IMPLEMENT_SIMPLE_SMOBS (Box);
  87 IMPLEMENT_TYPE_P (Box, "ly:box?");
  88 IMPLEMENT_DEFAULT_EQUAL_P (Box);
  89
  90 SCM
  91 Box::mark_smob (SCM x)
  92 {
  93   (void)x;
  94   return SCM_EOL;
  95 }
  96
  97 int
  98 Box::print_smob (SCM x, SCM p, scm_print_state*)
  99 {
 100   (void)x;
 101   scm_puts ("#<Box>", p);
 102   return 1;
 103 }