* lily/align-interface.cc (find_fixed_alignment_parent): new function.

[lilypond.git] / lily / rest.cc

diff --git a/lily/rest.cc b/lily/rest.cc
index 39347b1d5bc1f7bf8628d3ab8818a2b0bf3d134d..7e3c5ddac6e2bd5ae3131654ad0df95af5a53757 100644 (file)
--- a/lily/rest.cc
+++ b/lily/rest.cc
@@ -1,42 +1,167 @@
-#include "rest.hh"
-#include "dimen.hh" 
-#include "debug.hh"
-#include "paper-def.hh"
-#include "lookup.hh"
+/*
+ rest.cc -- implement Rest
+
+  source file of the GNU LilyPond music typesetter
+
+  (c)  1997--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+*/
+
 #include "molecule.hh"
+#include "paper-def.hh"
+#include "font-interface.hh"
+#include "rest.hh"
+#include "dots.hh"
+#include "paper-score.hh"
+#include "staff-symbol-referencer.hh"
 
+// -> offset callback
+MAKE_SCHEME_CALLBACK (Rest,after_line_breaking,1);
+SCM
+Rest::after_line_breaking (SCM smob)
+{
+  Grob *me = unsmob_grob (smob);
+  int bt = gh_scm2int (me->get_grob_property ("duration-log"));
+  int lc = Staff_symbol_referencer::line_count (me);
+  Real ss = Staff_symbol_referencer::staff_space (me);
+  if(lc % 2)
+    {
+      if (bt == 0 && lc > 1)
+       {
+         me->translate_axis (ss , Y_AXIS);
+       }
+    }
+  else
+    {
+      me->translate_axis (ss/2 , Y_AXIS);
+    }
 
-Rest::Rest(int t, int d)
+  Grob * d = unsmob_grob (me->get_grob_property ("dot"));
+  if (d && bt > 4) // UGH.
+    {
+      d->set_grob_property ("staff-position",
+                           gh_int2scm ((bt == 7) ? 4 : 3));
+    }
+  if (d && bt >= -1 && bt <= 1) // UGH again.
+    {
+      d->set_grob_property ("staff-position",
+                           gh_int2scm ((bt == 0) ? -1 : 1));
+    }
+  return SCM_UNSPECIFIED;
+}
+
+/*
+  make this function easily usable in C++
+ */
+String
+Rest::glyph_name (Grob *me, int balltype, String style)
 {
-    balltype = t;
-    dots = d;
+  bool ledgered_b = false;
+
+  if (balltype == 0 || balltype == 1)
+    {
+      Real rad = Staff_symbol_referencer::staff_radius (me) * 2.0;
+      Real pos = Staff_symbol_referencer::get_position (me);
+
+      /*
+       Figure out when the rest is far enough outside the staff. This
+       could bemore generic, but hey, we understand this even after
+       dinner.
+       */
+      ledgered_b |= (balltype == 0) && (pos >= +rad + 2 || pos < -rad);
+      ledgered_b |= (balltype == 1) && (pos <= -rad - 2 || pos > +rad);
+    }
+
+  String actual_style (style.to_str0 ());
+
+  if ((style == "mensural") || (style == "neo_mensural")) {
+
+    /*
+      FIXME: Currently, ancient font does not provide ledgered rests;
+      hence the "o" suffix in the glyph name is bogus.  But do we need
+      ledgered rests at all now that we can draw ledger lines with
+      variable width, length and blotdiameter? -- jr
+    */
+    ledgered_b = 0;
+
+    /*
+      There are no 32th/64th/128th mensural/neo_mensural rests.  In
+      these cases, revert back to default style.
+    */
+    if (balltype > 4)
+      actual_style = "";
+  }
+
+  if ((style == "classical") && (balltype != 2)) {
+    /*
+      classical style: revert back to default style for any rest other
+      than quarter rest
+    */
+    actual_style = "";
+  }
+
+  if (style == "default") {
+    /*
+      Some parts of lily still prefer style "default" over "".
+      Correct this here. -- jr
+    */
+    actual_style = "";
+  }
+
+  return ("rests-") + to_string (balltype) + (ledgered_b ? "o" : "") + actual_style;
 }
 
 
-void
-Rest::do_print()const
+MAKE_SCHEME_CALLBACK (Rest,brew_molecule,1);
+
+SCM
+Rest::brew_internal_molecule (SCM smob)
 {
-#ifndef NPRINT
-    mtor << "Rest "<<balltype<< "dots " << dots;
-    Item::print();
-#endif
+  Grob* me = unsmob_grob (smob);
+
+  SCM balltype_scm = me->get_grob_property ("duration-log");
+  if (!gh_number_p (balltype_scm))
+    return Molecule ().smobbed_copy ();
+
+  int balltype = gh_scm2int (balltype_scm);
+  
+  String style; 
+  SCM style_scm = me->get_grob_property ("style");
+  if (gh_symbol_p (style_scm))
+    {
+      style = ly_scm2string (scm_symbol_to_string (style_scm));
+    }
+
+  Font_metric *fm = Font_interface::get_default_font (me);
+  String font_char = glyph_name (me, balltype, style);
+  Molecule out = fm->find_by_name (font_char);
+  if (out.empty_b())
+    {
+      me->warning (_f ("rest `%s' not found, ", font_char.to_str0 ()));
+    }
+
+  return out.smobbed_copy();
 }
 
-Molecule*
-Rest::brew_molecule_p()const
+SCM 
+Rest::brew_molecule (SCM smob) 
 {
-    Paper_def *p =paper();
-
-    Symbol s;
-    s = p->lookup_l()->rest(balltype);
-    
-    Molecule *m = new Molecule(Atom(s));
-    if (dots) {
-       Symbol d =p->lookup_l()->dots(dots);
-       Molecule dm;
-       dm.add(Atom(d));
-       m->add_right(dm);
-    }
-    return m;
+  return brew_internal_molecule (smob);
 }
+MAKE_SCHEME_CALLBACK (Rest,extent_callback,2);
+/*
+  We need the callback. The real molecule has ledgers depending on
+  Y-position. The Y-position is known only after line breaking.  */
+SCM
+Rest::extent_callback (SCM smob, SCM ax)
+{
+  Axis a = (Axis) gh_scm2int (ax);
+  SCM m = brew_internal_molecule (smob);
+  return ly_interval2scm (unsmob_molecule (m)->extent (a));
+}
+
+
+
+ADD_INTERFACE (Rest,"rest-interface",
+  "a rest",
+  "style minimum-beam-collision-distance");