source file of the GNU LilyPond music typesetter
(c) 2002--2004 Juergen Reuter <reuter@ipd.uka.de>
+
+ Han-Wen Nienhuys <hanwen@xs4all.nl
+
*/
#include "engraver.hh"
-#include "item.hh"
#include "note-head.hh"
+#include "pitch-interval.hh"
+#include "protected-scm.hh"
#include "staff-symbol-referencer.hh"
-#include "event.hh"
-#include "pitch.hh"
+#include "axis-group-interface.hh"
+#include "side-position-interface.hh"
-
-/*
- UGH UGH UGH .
-
- rewrite this complely. --hwn
- */
-
-/*
- * This class implements an engraver for ambitus grobs.
- *
- * TODO: There are quite some conceptional issues left open:
- *
- * - Many publishers put ambitus _before_ the first occurrence of a
- * clef. Hence, formally the pitches are undefined in this case. Of
- * course, one could always silently assume that ambitus pitches refer
- * to the first occurrence of a clef. Or should we, by default, put
- * the ambitus always after the first clef, if any?
- *
- * - Enharmonically equal pitches: Assume piece contains once a "gis",
- * another time an "aes" as highest pitch. Which one should be
- * selected for the ambitus grob? The "aes", because it is
- * musically/notationally "higher" than "gis"? Or "gis", because (if
- * using pure temperament) it has a slightly higher frequency? Or
- * that pitch that come closer to the key signature? But there may be
- * key signature changes in the piece...
- *
- * - Multiple voices in single staff: Assume a vocal piece of music,
- * where the soprano voice and the alto voice are put into the same
- * staff (this is generally a bad idea, but unfortunately common
- * practice). Then, there probably should be two ambitus grobs, one
- * for each voice. But how can you see which ambitus grob refers to
- * which voice? Most probably you can guess it from the fact that the
- * ambitus of the alto voice typically lies in a lower range than that
- * of the soprano voice, but this is just a heuristic rather than a
- * generally valid rule. In the case of only two voices, using stems
- * in the ambitus grob might help, but probably looks quite ugly.
- *
- * - If a piece consists of several loosely coupled sections, should
- * there be multiple ambitus grobs allowed, one for each section?
- * Then there probably should be some "\ambitus" event added to
- * mudela, stating where an ambitus grob should be placed. This
- * ambitus grob should then represent the ambitus in the range of time
- * between this "\ambitus" event and the next one (or the end of the
- * piece, if there is no more such event). To be compliant with the
- * current implementation, we might implicitly assume an "\ambitus"
- * event at the beginning of the piece, but then the question where
- * to put this first ambitus grob (before/after the clef?) becomes
- * even more urgent.
- *
- * - Incipits of transcribed music may need special treatment for
- * ambitus, since, for readability, the ambitus most probably should
- * not refer to the ancient clefs of the incipit, but rather to the
- * clefs used in the transcribed parts.
- */
class Ambitus_engraver : public Engraver
{
public:
virtual void acknowledge_grob (Grob_info);
virtual void stop_translation_timestep ();
virtual void finalize ();
+ virtual void derived_mark () const;
private:
void create_ambitus ();
Item *ambitus_;
- bool is_typeset;
- Pitch pitch_min, pitch_max;
+ Item *group_;
+ Drul_array<Item *> heads_;
+ Drul_array<Item *> accidentals_;
+ Pitch_interval pitch_interval_;
+ bool is_typeset_;
+ int start_c0_;
+ SCM start_key_sig_;
};
+void
+Ambitus_engraver::derived_mark () const
+{
+ scm_gc_mark (start_key_sig_);
+}
+
+void
+Ambitus_engraver::create_ambitus ()
+{
+ ambitus_ = make_item ("AmbitusLine",SCM_EOL);
+ group_ = make_item ("Ambitus",SCM_EOL);
+ Direction d = DOWN;
+ do
+ {
+ heads_[d] = make_item ("AmbitusNoteHead", SCM_EOL);
+ accidentals_[d] = make_item ("AmbitusAccidental", SCM_EOL);
+ accidentals_[d]->set_parent (heads_[d], Y_AXIS);
+ heads_[d]->set_property ("accidental-grob", accidentals_[d]->self_scm ());
+ Axis_group_interface::add_element (group_, heads_[d]);
+ Axis_group_interface::add_element (group_, accidentals_[d]);
+ Side_position_interface::add_support (accidentals_[d], heads_[d]);
+ }
+ while (flip (&d) != DOWN);
+ ambitus_->set_parent (heads_[DOWN], X_AXIS);
+ Axis_group_interface::add_element (group_, ambitus_);
+
+ is_typeset_ = false;
+}
+
+
Ambitus_engraver::Ambitus_engraver ()
{
ambitus_ = 0;
- is_typeset = 0;
-
- /*
- * (pitch_min > pitch_max) means that pitches are not yet
- * initialized
- */
- pitch_min = Pitch (0, 0, SHARP);
- pitch_max = Pitch (0, 0, FLAT);
+ heads_[LEFT] = heads_[RIGHT] = 0;
+ accidentals_[LEFT] = accidentals_[RIGHT] = 0;
+ group_ = 0;
+ is_typeset_ = false;
+ start_key_sig_ = SCM_EOL;
}
void
* Otherwise, if a voice begins with a rest, the ambitus grob will
* be placed after the rest.
*/
- if (!ambitus_) {
- create_ambitus ();
- }
+ if (!ambitus_)
+ {
+ create_ambitus ();
+ }
}
void
Ambitus_engraver::stop_translation_timestep ()
{
- if (ambitus_ && !is_typeset)
+ if (ambitus_ && !is_typeset_)
{
/*
* Evaluate middleCPosition not until now, since otherwise we
* we are in a voice context; middleCPosition would then be
* assumed to be 0.
*/
- SCM c0 = get_property ("middleCPosition");
- ambitus_->set_property ("c0-position", c0);
+ start_c0_ = robust_scm2int (get_property ("middleCPosition"), 0);
+ start_key_sig_ = get_property ("keySignature");
- /*
- * Similar for keySignature.
- */
- SCM key_signature = get_property ("keySignature");
- ambitus_->set_property ("accidentals", key_signature);
- typeset_grob (ambitus_);
- is_typeset = true;
+ is_typeset_ = true;
}
}
if (nr && nr->is_mus_type ("note-event"))
{
Pitch pitch = *unsmob_pitch (nr->get_property ("pitch"));
- if (Pitch::compare (pitch_min, pitch_max) > 0) // already init'd?
- {
- // not yet init'd; use current pitch to init min/max
- pitch_min = pitch;
- pitch_max = pitch;
- }
- else if (Pitch::compare (pitch, pitch_max) > 0) // new max?
- {
- pitch_max = pitch;
- }
- else if (Pitch::compare (pitch, pitch_min) < 0) // new min?
- {
- pitch_min = pitch;
- }
+ pitch_interval_.add_point (pitch);
}
}
}
}
-void
-Ambitus_engraver::create_ambitus ()
-{
- ambitus_ = make_item ("Ambitus");
- is_typeset = false;
- announce_grob (ambitus_, SCM_EOL);
-}
-
void
Ambitus_engraver::finalize ()
{
- if (ambitus_)
+ if (ambitus_ && !pitch_interval_.is_empty ())
{
- if (Pitch::compare (pitch_min, pitch_max) <= 0)
- {
- ambitus_->set_property ("pitch-min",
- pitch_min.smobbed_copy ());
- ambitus_->set_property ("pitch-max",
- pitch_max.smobbed_copy ());
- }
- else // have not seen any pitch, so forget about the ambitus
+ Direction d = DOWN;
+ do
{
- /*
- * Do not print a warning on empty ambitus range, since this
- * most probably arises from an empty voice, such as shared
- * global timesig/clef definitions.
- */
- ambitus_->suicide ();
+ Pitch p = pitch_interval_[d];
+ heads_[d]->set_property ("staff-position",
+ scm_from_int (start_c0_ +
+ p.steps ()));
+
+ SCM handle = scm_assoc (scm_cons (scm_from_int (p.get_octave ()),
+ scm_from_int (p.get_notename ())),
+ start_key_sig_);
+
+ if (handle == SCM_BOOL_F)
+ handle = scm_assoc (scm_from_int (p.get_notename ()),
+ start_key_sig_);
+
+ int sig_alter = (handle != SCM_BOOL_F) ? scm_to_int (scm_cdr (handle)) : 0;
+ if (sig_alter == p.get_alteration ())
+ {
+ accidentals_[d]->suicide();
+ heads_[d]->set_property ("accidental-grob", SCM_EOL);
+ }
+ else
+ {
+ accidentals_[d]->set_property ("accidentals",
+ scm_list_1 (scm_from_int (p.get_alteration ())));
+ }
}
+ while (flip (&d) != DOWN);
+
+ ambitus_->set_property ("note-heads", scm_list_2 (heads_[DOWN]->self_scm (),
+ heads_[UP]->self_scm ()));
+ }
+ else
+ {
+ Direction d = DOWN;
+ do
+ {
+ accidentals_[d]->suicide();
+ heads_[d]->suicide();
+ }
+ while (flip (&d) != DOWN);
+ ambitus_->suicide();
}
}
ENTER_DESCRIPTION (Ambitus_engraver,
/* descr */ "",
-/* creats*/ "Ambitus",
+/* creats*/ "Ambitus AmbitusLine AmbitusNoteHead AmbitusAccidental",
/* accepts */ "",
/* acks */ "note-head-interface",
/* reads */ "",