* mf/GNUmakefile: always trace pfa fonts.

[lilypond.git] / lily / arpeggio.cc

diff --git a/lily/arpeggio.cc b/lily/arpeggio.cc
index 1e7253645c8a85e39fd60615222ae13610a79c72..ed040e70c56cbfe192ac1e761a985b640153c91f 100644 (file)
--- a/lily/arpeggio.cc
+++ b/lily/arpeggio.cc
@@ -1,50 +1,158 @@
 /*   
-  arpegggio.cc -- implement Arpeggio
+  arpeggio.cc -- implement Arpeggio
 
   source file of the GNU LilyPond music typesetter
   
-  (c) 2000 Jan Nieuwenhuizen <janneke@gnu.org>
+  (c) 2000--2003 Jan Nieuwenhuizen <janneke@gnu.org>
  */
 
 #include "molecule.hh"
 #include "paper-def.hh"
-#include "lookup.hh"
 #include "arpeggio.hh"
-#include "score-element.hh"
+#include "grob.hh"
 #include "stem.hh"
 #include "staff-symbol-referencer.hh"
+#include "staff-symbol.hh"
+#include "warn.hh"
+#include "font-interface.hh"
+#include "lookup.hh"
 
-bool
-Arpeggio::has_interface (Score_element* me)
-{
-  return me && me->has_interface (ly_symbol2scm ("arpeggio-interface"));
-}
 
 MAKE_SCHEME_CALLBACK (Arpeggio, brew_molecule, 1);
 SCM 
 Arpeggio::brew_molecule (SCM smob) 
 {
-  Score_element *me = unsmob_element (smob);
+  Grob *me = unsmob_grob (smob);
   
-  Interval iv; 
-  for (SCM s = me->get_elt_property ("stems"); gh_pair_p (s); s = gh_cdr (s))
+  Grob * common = me;
+  for (SCM s = me->get_grob_property ("stems"); gh_pair_p (s); s = ly_cdr (s))
+    {
+      Grob * stem =  unsmob_grob (ly_car (s));
+      common =  common->common_refpoint (Staff_symbol_referencer::get_staff_symbol (stem),
+                                Y_AXIS);
+    }
+
+  /*
+    TODO:
+    
+    Using stems here is not very convenient; should store noteheads
+    instead, and also put them into the support. Now we will mess up
+    in vicinity of a collision.
+
+  */
+  Interval heads;
+  Real my_y = me->relative_coordinate (common, Y_AXIS);
+      
+  for (SCM s = me->get_grob_property ("stems"); gh_pair_p (s); s = ly_cdr (s))
     {
-      Score_element *stem = unsmob_element (gh_car (s));
-      iv.unite (Stem::head_positions (stem));
+      Grob * stem = unsmob_grob (ly_car (s));
+      Grob * ss = Staff_symbol_referencer::get_staff_symbol (stem);
+      Interval iv =Stem::head_positions (stem);
+      iv *= Staff_symbol::staff_space (ss)/2.0;
+      
+      heads.unite (iv + ss->relative_coordinate (common, Y_AXIS)
+                  - my_y);
     }
 
+  if (heads.empty_b ())
+    {
+      /*
+       Dumb blonde error
+
+       :-)
+       */
+      programming_error ("Huh, no heads for arpeggio found.");
+      return SCM_EOL;
+    }
+
+  SCM ad = me->get_grob_property ("arpeggio-direction");
+  Direction dir = CENTER;
+  if (is_direction (ad))
+    {
+      dir = to_dir (ad);
+    }
+  
   Molecule mol;
-  Molecule arpeggio = me->paper_l ()->lookup_l (0)->afm_find ("scripts-arpeggio");
-  Real staff_space = Staff_symbol_referencer::staff_space (me);
-  for (int i = (int)iv[MIN]/ 2; i < (int)(iv[MAX] - 1)/ 2; i++)
+  Font_metric *fm =Font_interface::get_default_font (me);
+  Molecule squiggle = fm->find_by_name ("scripts-arpeggio");
+
+  Molecule arrow ;  
+  if (dir)
     {
-      Molecule a (arpeggio);
-      a.translate_axis (i * staff_space, Y_AXIS);
-      mol.add_molecule (a);
+      arrow = fm->find_by_name ("scripts-arpeggio-arrow-" + to_string (dir));
+      heads[dir] -= dir * arrow.extent (Y_AXIS).length();
     }
-  mol.translate (Offset (-2 * staff_space, 0));
+  
+  for (Real  y= heads[LEFT] ; y < heads[RIGHT];
+       y+= squiggle. extent (Y_AXIS).length ())
+      mol.add_at_edge (Y_AXIS, UP,squiggle, 0.0, 0);
 
-  return mol.create_scheme (); 
+  mol.translate_axis (heads[LEFT], Y_AXIS);
+  if (dir)
+    mol.add_at_edge (Y_AXIS, dir,arrow, 0,0);
+  
+  return mol.smobbed_copy () ;
 }
 
+/* Draws a vertical bracket to the left of a chord 
+   Chris Jackson <chris@fluffhouse.org.uk> */
+
+MAKE_SCHEME_CALLBACK (Arpeggio, brew_chord_bracket, 1);
+SCM 
+Arpeggio::brew_chord_bracket (SCM smob) 
+{
+  Grob *me = unsmob_grob (smob);
+  
+  Grob * common = me;
+  for (SCM s = me->get_grob_property ("stems"); gh_pair_p (s); s = ly_cdr (s))
+    {
+      Grob * stem =  unsmob_grob (ly_car (s));
+      common =  common->common_refpoint (Staff_symbol_referencer::get_staff_symbol (stem),
+                                Y_AXIS);
+    }
+
+  Interval heads;
+  Real my_y = me->relative_coordinate (common, Y_AXIS);
+      
+  for (SCM s = me->get_grob_property ("stems"); gh_pair_p (s); s = ly_cdr (s))
+    {
+      Grob * stem = unsmob_grob (ly_car (s));
+      Grob * ss = Staff_symbol_referencer::get_staff_symbol (stem);
+      Interval iv = Stem::head_positions (stem);
+      iv *= Staff_symbol::staff_space (ss)/2.0;      
+      heads.unite (iv  +  ss->relative_coordinate (common, Y_AXIS)  -  my_y);
+    }
+
+  Real lt =  me->get_paper ()->get_realvar (ly_symbol2scm ("linethickness"));
+  Real sp = 1.5 * Staff_symbol_referencer::staff_space (me);
+  Real dy = heads.length() + sp;
+  Real x = 0.7;
+
+  Molecule mol (Lookup::bracket (Y_AXIS, Interval (0, dy), lt, x));
+  mol.translate_axis (heads[LEFT] - sp/2.0, Y_AXIS);
+  return mol.smobbed_copy();
+}
+
+
+/*
+  We have to do a callback, because brew_molecule () triggers a
+  vertical alignment if it is cross-staff.
+  This callback also adds padding.
+*/
+MAKE_SCHEME_CALLBACK (Arpeggio, width_callback,2);
+SCM
+Arpeggio::width_callback (SCM smob, SCM axis)
+{
+  Grob * me = unsmob_grob (smob);
+  Axis a = (Axis)gh_scm2int (axis);
+  assert (a == X_AXIS);
+  Molecule arpeggio = Font_interface::get_default_font (me)->find_by_name ("scripts-arpeggio");
+
+  return ly_interval2scm (arpeggio.extent (X_AXIS) * 1.5);
+}
+
+
+ADD_INTERFACE (Arpeggio, "arpeggio-interface",
+  "Functions and settings for drawing an arpeggio symbol (a wavy line left to noteheads.",
+  "stems arpeggio-direction");