+/*
+ key-item.cc -- implement Key_item
+
+ source file of the GNU LilyPond music typesetter
+
+ (c) 1996--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+
+ keyplacement by Mats Bengtsson
+*/
+
+#include "item.hh"
#include "key-item.hh"
-#include "key.hh"
-#include "debug.hh"
#include "molecule.hh"
#include "paper-def.hh"
+#include "font-interface.hh"
+#include "staff-symbol-referencer.hh"
#include "lookup.hh"
-//#include "clef-reg.hh"
-#include "key-reg.hh"
+/*
+ FIXME: too much hardcoding here.
+ */
const int FLAT_TOP_PITCH=2; /* fes,ges,as and bes typeset in lower octave */
const int SHARP_TOP_PITCH=4; /* ais and bis typeset in lower octave */
+/*
+ FIXME: key-item should just get a list of (position, acc), and leave
+ the thinking to other parties.
-Key_item::Key_item(int c)
-{
- set_c_position(c);
-}
+ - TODO: put this in Scheme
+
+ - lots of values trivially shared (key doesn't change very
+ often). Compute those once, and use that as cache for the rest.
-void
-Key_item::read(const Key_register& key_reg_r)
+*/
+int
+alteration_pos (SCM what, int alter, int c0p)
{
- const Array<int> &idx_arr =key_reg_r.accidental_idx_arr_;
- for (int i = 0 ; i< idx_arr.size(); i++) {
- int note = idx_arr[i];
- int acc = key_reg_r.key_.acc(note);
+ if (gh_pair_p (what))
+ return gh_scm2int (gh_car (what)) * 7 + gh_scm2int (gh_cdr (what)) + c0p;
+
+ int p = gh_scm2int (what);
+
+ // Find the c in the range -4 through 2
+ int from_bottom_pos = c0p + 4;
+ from_bottom_pos = from_bottom_pos%7;
+ from_bottom_pos = (from_bottom_pos + 7)%7; // Precaution to get positive.
+ int c0 = from_bottom_pos - 4;
- add(note, acc);
+
+ if ((alter <0 && ((p>FLAT_TOP_PITCH) || (p+c0>4)) && (p+c0>1))
+ ||
+ (alter >0 && ((p>SHARP_TOP_PITCH) || (p+c0>5)) && (p+c0>2)))
+ {
+ p -= 7; /* Typeset below c_position */
}
+ /* Provide for the four cases in which there's a glitch
+ it's a hack, but probably not worth
+ the effort of finding a nicer solution.
+ --dl. */
+ if (c0==2 && alter >0 && p==3)
+ p -= 7;
+ if (c0==-3 && alter>0 && p==-1)
+ p += 7;
+ if (c0==-4 && alter<0 && p==-1)
+ p += 7;
+ if (c0==-2 && alter<0 && p==-3)
+ p += 7;
+
+ return p + c0;
}
-void
-Key_item::set_c_position(int c0)
+/*
+ TODO
+ - space the `natural' signs wider
+ */
+MAKE_SCHEME_CALLBACK (Key_item,brew_molecule,1);
+SCM
+Key_item::brew_molecule (SCM smob)
{
- int octaves =(abs(c0) / 7) +1 ;
- c_position=(c0 + 7*octaves)%7;
-}
+ Grob*me =unsmob_grob (smob);
+ Real inter = Staff_symbol_referencer::staff_space (me)/2.0;
+
+ SCM scm_style = me->get_grob_property ("style");
+ String style;
+ if (gh_symbol_p (scm_style))
+ {
+ style = ly_scm2string (scm_symbol_to_string (scm_style));
+ }
+ else
+ {
+ style = "";
+ }
-void
-Key_item::add(int p, int a)
-{
- if ((a<0 && p>FLAT_TOP_PITCH) ||
- (a>0 && p>SHARP_TOP_PITCH)) {
- p -= 7; /* Typeset below c_position */
+ SCM newas = me->get_grob_property ("new-accidentals");
+ Molecule mol;
+ /*
+ SCM lists are stacks, so we work from right to left, ending with
+ the cancellation signature.
+ */
+ int c0p = gh_scm2int (me->get_grob_property ("c0-position"));
+
+ for (SCM s = newas; gh_pair_p (s); s = gh_cdr (s))
+ {
+ SCM what = gh_caar (s);
+ int alter = gh_scm2int (gh_cdar (s));
+ int pos = alteration_pos (what, alter, c0p);
+
+ Molecule m = Font_interface::get_default_font (me)->
+ find_by_name (String ("accidentals-") + style + to_str (alter));
+ m.translate_axis (pos * inter, Y_AXIS);
+ mol.add_at_edge (X_AXIS, LEFT, m, 0);
}
- pitch.push(p);
- acc.push(a);
+
+ Item *it = dynamic_cast<Item*> (me) ;
+ if (it->break_status_dir () != RIGHT)
+ {
+ SCM old = me->get_grob_property ("old-accidentals");
+
+ /*
+ Add half a space between cancellation and key sig.
+
+ As suggested by [Ross], p.148.
+ */
+ Interval x (0, inter);
+ Interval y (0,0);
+
+ mol.add_at_edge (X_AXIS, LEFT, Lookup::blank (Box (x,y)),0);
+
+ Molecule natural;
+ if (gh_pair_p (old))
+ natural=Font_interface::get_default_font (me)->
+ find_by_name (String ("accidentals-") + style + String ("0"));
+
+ for (; gh_pair_p (old); old = gh_cdr (old))
+ {
+ SCM found = scm_assoc (gh_caar (old), newas);
+ if (found == SCM_BOOL_F
+ || gh_cdr (found) != gh_cdar (old))
+ {
+ SCM what = gh_caar (old);
+ int alter = 0;
+ int pos = alteration_pos (what, alter, c0p);
+
+ Molecule m = natural;
+ m.translate_axis (pos* inter, Y_AXIS);
+
+ mol.add_at_edge (X_AXIS, LEFT, m, 0);
+ }
+ }
+ }
+
+ return mol.smobbed_copy ();
}
-Molecule*
-Key_item::brew_molecule_p()const
+
+
+
+bool
+Key_item::has_interface (Grob*m)
{
- Molecule*output = new Molecule;
- Real inter = paper()->internote();
-
- for (int i =0; i < pitch.size(); i++) {
- Symbol s= paper()->lookup_l()->accidental(acc[i]);
- Atom a(s);
- a.translate(Offset(0,(c_position + pitch[i]) * inter));
- Molecule m(a);
- output->add_right(m);
- }
- Molecule m(paper()->lookup_l()->fill(Box(
- Interval(0, paper()->note_width()),
- Interval(0,0))));
- output->add_right(m);
- return output;
+ return m && m->has_interface (ly_symbol2scm ("key-signature-interface"));
+}
+
+void
+Key_item::set_interface (Grob*m)
+{
+ m->set_interface (ly_symbol2scm ("key-signature-interface"));
}
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