+
+/*
+ Compute the width the head without ledgers.
+
+ -- there used to be some code from the time that ledgers
+ did take space. Nowadays, we can simply take the standard extent.
+ */
+Interval
+Note_head::head_extent (Grob *me, Axis a)
+{
+ Molecule * mol = me->get_molecule();
+ return mol ? mol ->extent (a) : Interval(0,0);
+}
+
+
+
+MAKE_SCHEME_CALLBACK (Note_head,brew_ez_molecule,1);
+
+SCM
+Note_head::brew_ez_molecule (SCM smob)
+{
+ Grob *me = unsmob_grob (smob);
+ int l = Note_head::get_balltype (me);
+
+ int b = (l >= 2);
+
+ SCM cause = me->get_grob_property ("cause");
+ SCM spitch = unsmob_music (cause)->get_mus_property ("pitch");
+ Pitch* pit = unsmob_pitch (spitch);
+
+ char s[2] = "a";
+ s[0] = (pit->notename_ + 2)%7 + 'a';
+ s[0] = toupper (s[0]);
+
+ SCM charstr = scm_makfrom0str (s);
+
+ SCM at = scm_list_n (ly_symbol2scm ("ez-ball"),
+ charstr,
+ gh_int2scm (b),
+ gh_int2scm (1-b),
+ SCM_UNDEFINED);
+ Box bx (Interval (0, 1.0), Interval (-0.5, 0.5));
+ Molecule m (bx, at);
+
+ int pos = (int)rint (Staff_symbol_referencer::get_position (me));
+ int interspaces = Staff_symbol_referencer::line_count (me)-1;
+ if (abs (pos) - interspaces > 1)
+ {
+ Interval hd = m.extent (X_AXIS);
+ Real hw = hd.length ()/4;
+ Interval extent = Interval (hd[LEFT] - hw, hd[RIGHT] + hw);
+ m.add_molecule (brew_ledger_lines (me, pos, interspaces, extent, false));
+ }
+
+ return m.smobbed_copy ();
+}
+
+
+Real
+Note_head::stem_attachment_coordinate (Grob *me, Axis a)
+{
+ SCM v = me->get_grob_property ("stem-attachment-function");
+
+ if (!gh_procedure_p (v))
+ return 0.0;
+
+ SCM st = me->get_grob_property ("style");
+ SCM log = gh_int2scm (get_balltype (me));
+ SCM result = gh_apply (v, scm_list_n (st, log, SCM_UNDEFINED));
+
+ if (!gh_pair_p (result))
+ return 0.0;
+
+ result = (a == X_AXIS) ? ly_car (result) : ly_cdr (result);
+
+ return gh_number_p (result) ? gh_scm2double (result) : 0.0;
+}
+
+
+int
+Note_head::get_balltype (Grob*me)
+{
+ SCM s = me->get_grob_property ("duration-log");
+ return gh_number_p (s) ? gh_scm2int (s) <? 2 : 0;
+}
+
+ADD_INTERFACE (Note_head,"note-head-interface",
+ "Note head",
+ "accidental-grob style stem-attachment-function");
+