lily/rest.cc

   1 /*
   2  rest.cc -- implement Rest
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #include "molecule.hh"
  10 #include "paper-def.hh"
  11 #include "lookup.hh"
  12 #include "rest.hh"
  13 #include "dots.hh"
  14 #include "paper-score.hh"
  15 #include "staff-symbol-referencer.hh"
  16
  17 // -> offset callback
  18 MAKE_SCHEME_CALLBACK(Rest,after_line_breaking);
  19 SCM
  20 Rest::after_line_breaking (SCM smob)
  21 {
  22   Score_element *me = unsmob_element (smob);
  23   int bt = gh_scm2int (me->get_elt_property ("duration-log"));
  24   if (bt == 0)
  25     {
  26
  27       me->translate_axis (Staff_symbol_referencer::staff_space (me) , Y_AXIS);
  28     }
  29
  30   Score_element * d = unsmob_element (me->get_elt_property ("dot"));
  31   if (d && bt > 4) // UGH.
  32     {
  33       d->set_elt_property ("staff-position",
  34                            gh_int2scm ((bt == 7) ? 4 : 3));
  35     }
  36
  37   return SCM_UNSPECIFIED;
  38 }
  39
  40
  41 MAKE_SCHEME_CALLBACK(Rest,brew_molecule)
  42 SCM
  43 Rest::brew_molecule (SCM smob)
  44 {
  45   Score_element* me = unsmob_element (smob);
  46
  47   bool ledger_b =false;
  48
  49   SCM balltype = me->get_elt_property ("duration-log");
  50
  51   if (balltype == gh_int2scm (0) || balltype == gh_int2scm (1))
  52     {
  53       int sz = Staff_symbol_referencer::line_count (me);
  54       Real dif = abs(Staff_symbol_referencer::position_f (me)  - (2* gh_scm2int (balltype) - 1));
  55       ledger_b = dif > sz;
  56     }
  57
  58   String style;
  59   SCM style_sym =me->get_elt_property ("style");
  60   if (gh_scm2int (balltype) >= 2 && gh_string_p (style_sym))
  61     {
  62       style = ly_scm2string (style_sym);
  63     }
  64
  65   String idx =  ("rests-") + to_str (gh_scm2int (balltype))
  66     + (ledger_b ? "o" : "") + style;
  67
  68   return me-> lookup_l ()->afm_find (idx).create_scheme();
  69 }
  70
  71
  72 bool
  73 Rest::has_interface (Score_element*m)
  74 {
  75   return m && m->has_interface (ly_symbol2scm ("rest-interface"));
  76 }