*** empty log message ***

[lilypond.git] / lily / time-signature.cc

diff --git a/lily/time-signature.cc b/lily/time-signature.cc
index 5cc5118cdb7dca1ae28c8a0a77feb4b528f22b76..e360f810338d36c95d797b6d220a65d26f0db9b9 100644 (file)
--- a/lily/time-signature.cc
+++ b/lily/time-signature.cc
@@ -3,79 +3,110 @@
   
   source file of the GNU LilyPond music typesetter
   
-  (c) 1996--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 1996--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   
  */
 
 
 #include "molecule.hh"
+#include "text-item.hh"
 #include "time-signature.hh"
 #include "paper-def.hh"
-#include "lookup.hh"
-
-MAKE_SCHEME_CALLBACK(Time_signature,brew_molecule);
+#include "font-interface.hh"
+#include "warn.hh"
+#include "staff-symbol-referencer.hh"
 
+MAKE_SCHEME_CALLBACK (Time_signature,brew_molecule,1);
+/*
+  TODO: make different functions for special and normal timesigs.
+ */
 SCM
 Time_signature::brew_molecule (SCM smob) 
 {
-  Score_element * me = unsmob_element (smob);
-  SCM st = me->get_elt_property ("style");
-  SCM frac = me->get_elt_property ("fraction");
+  Grob * me = unsmob_grob (smob);
+  SCM st = me->get_grob_property ("style");
+  SCM frac = me->get_grob_property ("fraction");
   int n = 4;
   int d = 4;
   if (gh_pair_p (frac))
     {
-      n = gh_scm2int (gh_car (frac));
-      d = gh_scm2int (gh_cdr (frac));
+      n = gh_scm2int (ly_car (frac));
+      d = gh_scm2int (ly_cdr (frac));
     }
 
-  
-  if (gh_string_p (st))
+  Molecule m;
+  if (gh_symbol_p (st))
     {
-      String style (ly_scm2string (st));
+      String style (ly_scm2string (scm_symbol_to_string (st)));
       if (style[0]=='1')
        {
-         return time_signature (me, n, 0).create_scheme();
+         m = time_signature (me, n, 0);
        }
       else
        {
-         return special_time_signature (me, style, n, d).create_scheme();
+         m = special_time_signature (me, style, n, d);
        }
     }
   else
-    return time_signature (me, n,d).create_scheme();
+    m = time_signature (me, n,d);
+
+  if (Staff_symbol_referencer::line_count (me) % 2 == 0)
+    m.translate_axis (Staff_symbol_referencer::staff_space (me)/2 , Y_AXIS);
+
+  return m.smobbed_copy ();
 }
 
 Molecule
-Time_signature::special_time_signature (Score_element*me, String s, int n, int d)
+Time_signature::special_time_signature (Grob*me, String s, int n, int d)
 {
-  // First guess: s contains only the signature style
-  String symbolname = "timesig-" + s + to_str (n) + "/" + to_str (d);
+  /*
+    Randomly probing the font sucks?
+  */
   
-  Molecule m = me->lookup_l ()->afm_find (symbolname, false);
-  if (!m.empty_b()) 
+  SCM alist_chain = Font_interface::font_alist_chain (me);
+  
+  SCM style_chain =
+    Font_interface::add_style (me, ly_symbol2scm ("timesig-symbol"),
+                              alist_chain);
+
+  Font_metric *feta = Font_interface::get_font (me, style_chain);
+
+  /*
+    First guess: s contains only the signature style, append fraction.
+  */
+  String symbolname = "timesig-" + s + to_string (n) + "/" + to_string (d);
+  
+  Molecule m = feta->find_by_name (symbolname);
+  if (!m.empty_b ())
     return m;
 
-  // Second guess: s contains the full signature name
-  m = me->lookup_l ()->afm_find ("timesig-"+s, false);
+  /*
+    Second guess: s contains the full signature name
+  */
+  m = feta->find_by_name ("timesig-" + s);
+  m.align_to (X_AXIS, LEFT);
   if (!m.empty_b ()) 
     return m;
 
-  // Resort to default layout with numbers
-  return time_signature (me, n,d);
+  /*
+    If there is no such symbol, we default without warning to the
+    numbered style.
+   */
+  return time_signature (me, n, d);
 }
 
 
 Molecule
-Time_signature::time_signature (Score_element*me,int num, int den)
+Time_signature::time_signature (Grob*me,int num, int den)
 {
-  String sty = "timesig";
+  SCM chain = Font_interface::font_alist_chain (me);
 
-  /*
-    UGH: need to look at fontsize.
-   */
-  Molecule n (me->lookup_l ()->text (sty, to_str (num), me->paper_l ()));
-  Molecule d (me->lookup_l ()->text (sty, to_str (den), me->paper_l ()));
+  Molecule n = Text_item::text2molecule (me,
+                                        scm_makfrom0str (to_string (num).to_str0 ()),
+                                        chain);
+  Molecule d = Text_item::text2molecule (me,
+                                        scm_makfrom0str (to_string (den).to_str0 ()),
+                                        chain);
   n.align_to (X_AXIS, CENTER);
   d.align_to (X_AXIS, CENTER);
   Molecule m;
@@ -89,6 +120,40 @@ Time_signature::time_signature (Score_element*me,int num, int den)
       m = n;
       m.align_to (Y_AXIS, CENTER);
     }
+
+  m.align_to (X_AXIS, LEFT);
+  
   return m;
 }
 
+
+
+ADD_INTERFACE (Time_signature,"time-signature-interface",
+  "A time signature, in different styles.
+  The following values for 'style are are recognized:
+
+    @table @samp
+      @item @code{C}
+        4/4 and 2/2 are typeset as C and struck C, respectively.  All
+        other time signatures are written with two digits.
+
+      @item @code{old}
+        2/2, 3/2, 2/4, 3/4, 4/4, 6/4, 9/4, 4/8, 6/8 and 9/8 are
+        typeset with old-style mensuration marks.  All other time
+        signatures are written with two digits.
+
+      @item @code{1xxx}
+        All time signatures are typeset with a single
+        digit, e.g. 3/2 is written as 3. (Any symbol starting
+       with the digit @code{1} will do.)
+
+      @item @code{C}@var{M}@code{/}@var{N}, 
+@code{old}@var{M}@code{/}@var{N} or
+      @code{old6/8alt}
+        Tells LilyPond to use a specific symbol as time signature, 
+       regardless of the actual time signature.
+    @end table
+
+See also the test-file @file{input/test/time.ly}.
+",
+  "fraction style");