catch GUILE errors

[lilypond.git] / lily / rest.cc

diff --git a/lily/rest.cc b/lily/rest.cc
index f05f5c0f55c9569facfcb468db3f0940d003a86a..7375e107f5f4e195ba9301f0d3102a44929c5776 100644 (file)
--- a/lily/rest.cc
+++ b/lily/rest.cc
@@ -3,7 +3,7 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c)  1997--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c)  1997--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
 */
 
 #include "molecule.hh"
@@ -15,13 +15,13 @@
 #include "staff-symbol-referencer.hh"
 
 // -> offset callback
-MAKE_SCHEME_CALLBACK(Rest,after_line_breaking,1);
+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"));
-  if (bt == 0)
+  if (bt == 0 && Staff_symbol_referencer::line_count (me) > 1)
     {
       me->translate_axis (Staff_symbol_referencer::staff_space (me) , Y_AXIS);
     }
@@ -30,42 +30,72 @@ Rest::after_line_breaking (SCM smob)
   if (d && bt > 4) // UGH.
     {
       d->set_grob_property ("staff-position",
-                          gh_int2scm ((bt == 7) ? 4 : 3));
+                           gh_int2scm ((bt == 7) ? 4 : 3));
     }
 
   return SCM_UNSPECIFIED;
 }
 
+/*
+  make this function easily usable in C++
+ */
+
+String
+Rest::glyph_name (Grob * me, int balltype, String style)
+{
+  bool ledger_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.
+       
+       */
+      ledger_b = ledger_b || (balltype == 0 && (pos >= rad +2   || pos < -rad ));
+      ledger_b = ledger_b || (balltype == 1 &&
+                             (pos  <= -rad -2 || pos > rad));
+    }
+
+  return ("rests-") + to_string (balltype)
+    + (ledger_b ? "o" : "") + style;
+}
+
+
+
 
-MAKE_SCHEME_CALLBACK(Rest,brew_molecule,1);
+MAKE_SCHEME_CALLBACK (Rest,brew_molecule,1);
 
 SCM
 Rest::brew_internal_molecule (SCM smob)
 {
   Grob* me = unsmob_grob (smob);
-  
-  bool ledger_b =false;
 
-  SCM balltype = me->get_grob_property ("duration-log");
-  
-  if (balltype == gh_int2scm (0) || balltype == gh_int2scm (1))
-    {
-      int sz = Staff_symbol_referencer::line_count (me);
-      Real dif = abs(Staff_symbol_referencer::position_f (me)  - (2* gh_scm2int (balltype) - 1)); 
-      ledger_b = dif > sz;
-    }
+  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_sym =me->get_grob_property ("style");
-  if (gh_scm2int (balltype) >= 2 && gh_symbol_p (style_sym))
+  if (gh_symbol_p (style_sym))
     {
       style = ly_scm2string (scm_symbol_to_string (style_sym));
     }
 
-  String idx =  ("rests-") + to_str (gh_scm2int (balltype))
-    + (ledger_b ? "o" : "") + style;
-
-  return Font_interface::get_default_font (me)->find_by_name (idx).smobbed_copy();
+  for(;;) {
+    String idx = glyph_name (me, balltype, style);
+    Molecule res = Font_interface::get_default_font (me)->find_by_name (idx);
+    if(res.empty_b() && style!="")
+      style="";
+    else             
+      return res.smobbed_copy();
+  }
 }
 
 SCM 
@@ -73,7 +103,7 @@ Rest::brew_molecule (SCM smob)
 {
   return brew_internal_molecule (smob);
 }
-MAKE_SCHEME_CALLBACK(Rest,extent_callback,2);
+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.  */
@@ -85,8 +115,9 @@ Rest::extent_callback (SCM smob, SCM ax)
   return ly_interval2scm (unsmob_molecule (m)->extent (a));
 }
 
-bool
-Rest::has_interface (Grob*m)
-{
-  return m && m->has_interface (ly_symbol2scm ("rest-interface"));
-}
+
+
+ADD_INTERFACE (Rest,"rest-interface",
+  "a rest",
+  "style minimum-beam-collision-distance");
+