source file of the GNU LilyPond music typesetter
- (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
- Jan Nieuwenhuizen <janneke@gnu.org>
+ (c) 2000--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ Erik Sandberg <mandolaerik@gmail.com>
*/
-#include "timing-translator.hh"
-#include "stem.hh"
+#include "math.h" // ceil
+
#include "beam.hh"
-#include "musical-request.hh"
+#include "engraver-group.hh"
+#include "international.hh"
+#include "item.hh"
#include "misc.hh"
+#include "repeated-music.hh"
+#include "rhythmic-head.hh"
+#include "spanner.hh"
+#include "stem-tremolo.hh"
+#include "stem.hh"
#include "warn.hh"
-#include "score-engraver.hh"
-#include "engraver.hh"
-#include "drul-array.hh"
-#include "timing-engraver.hh"
-#include "beaming.hh"
+
+#include "translator.icc"
/**
- Generate a beam tremolo. Eat stems.
- UGH. Derive me from Beam_engraver.
-
- */
+This acknowledges repeated music with "tremolo" style. It typesets
+a beam.
+
+TODO:
+
+- perhaps use engraver this to steer other engravers? That would
+create dependencies between engravers, which is bad.
+
+- create dots if appropriate.
+
+- create TremoloBeam iso Beam?
+*/
class Chord_tremolo_engraver : public Engraver
{
-public:
- VIRTUAL_COPY_CONS(Translator);
-
+ TRANSLATOR_DECLARATIONS (Chord_tremolo_engraver);
+protected:
+ Music *repeat_;
- Chord_tremolo_engraver();
+ int flags_;
+ // number of beams for short tremolos
+ int expected_beam_count_;
+ // current direction of beam (first RIGHT, then LEFT)
+ Direction beam_dir_;
+ Spanner *beam_;
protected:
- virtual void do_removal_processing();
- virtual void do_process_music();
- virtual bool do_try_music (Music*);
- virtual void acknowledge_element (Score_element_info);
- virtual void do_pre_move_processing();
- virtual void do_post_move_processing();
-
-private:
- void typeset_beam ();
- Drul_array<Chord_tremolo_req*> reqs_drul_;
- Chord_tremolo_req* prev_start_req_;
- Beam* beam_p_;
- Beam* finished_beam_p_;
-
- /// location within measure where beam started.
- Moment beam_start_location_;
-
- /// moment (global time) where beam started.
- Moment beam_start_mom_;
- Beaming_info_list * beam_info_p_;
- Beaming_info_list * finished_beam_info_p_;
+ virtual void finalize ();
+ virtual bool try_music (Music *);
+ void process_music ();
+ DECLARE_ACKNOWLEDGER (stem);
};
-ADD_THIS_TRANSLATOR (Chord_tremolo_engraver);
-
Chord_tremolo_engraver::Chord_tremolo_engraver ()
{
- reqs_drul_[LEFT] = reqs_drul_[RIGHT] = 0;
- beam_p_ = 0;
- finished_beam_p_ = 0;
- prev_start_req_ = 0;
- finished_beam_info_p_=0;
- beam_info_p_ =0;
+ beam_ = 0;
+ repeat_ = 0;
+ flags_ = 0;
+ expected_beam_count_ = 0;
+ beam_dir_ = CENTER;
}
bool
-Chord_tremolo_engraver::do_try_music (Music* m)
+Chord_tremolo_engraver::try_music (Music *m)
{
- if (Chord_tremolo_req* b = dynamic_cast <Chord_tremolo_req *> (m))
+ if (m->is_mus_type ("tremolo-span-event"))
{
- Direction d = b->span_dir_;
- if (reqs_drul_[d] && !reqs_drul_[d]->equal_b (b))
- return false;
-
- if ((d == STOP) && !beam_p_)
+ Direction span_dir = to_dir (m->get_property ("span-direction"));
+ if (span_dir == START)
{
- m->warning (_ ("can't find start of chord tremolo"));
- return false;
+ repeat_ = m;
+ int type = scm_to_int (m->get_property ("tremolo-type"));
+ /* e.g. 1 for type 8, 2 for type 16 */
+ flags_ = intlog2 (type) - 2;
+ expected_beam_count_ = scm_to_int (m->get_property ("expected-beam-count"));
+ beam_dir_ = RIGHT;
+ }
+ if (span_dir == STOP)
+ {
+ repeat_ = 0;
+ beam_ = 0;
+ expected_beam_count_ = 0;
+ beam_dir_ = CENTER;
}
-
- reqs_drul_[d] = b;
return true;
}
-
return false;
}
void
-Chord_tremolo_engraver::do_process_music ()
+Chord_tremolo_engraver::process_music ()
{
- if (reqs_drul_[STOP])
- {
- if (!beam_p_)
- reqs_drul_[STOP]->warning (_ ("can't find start of chord tremolo"));
-
- prev_start_req_ = 0;
-
- finished_beam_p_ = beam_p_;
- beam_p_ = 0;
-
- finished_beam_info_p_ = beam_info_p_;
- beam_info_p_ = 0;
- }
-
- if (beam_p_)
+ if (repeat_ && !beam_)
{
- Score_engraver * e = 0;
- Translator * t = daddy_grav_l ();
- for (; !e && t; t = t->daddy_trans_l_)
- {
- e = dynamic_cast<Score_engraver*> (t);
- }
-
- if (!e)
- programming_error ("No score engraver!");
- else
- e->forbid_breaks ();
+ beam_ = make_spanner ("Beam", repeat_->self_scm ());
}
-
- if (reqs_drul_[START])
- {
- if (beam_p_)
- {
- reqs_drul_[START]->warning (_ ("already have a chord tremolo"));
- return;
- }
-
- prev_start_req_ = reqs_drul_[START];
-
- beam_p_ = new Beam;
- beam_p_->set_elt_property ("chord-tremolo", SCM_BOOL_T);
- Translator * t = daddy_grav_l ()->get_simple_translator ("Timing_engraver");
- Timing_engraver *timer = dynamic_cast<Timing_engraver*> (t);
- beam_start_location_ = (t) ? timer->measure_position () : Moment (0);
- beam_start_mom_ = now_mom();
- beam_info_p_ = new Beaming_info_list;
-
- announce_element (Score_element_info (beam_p_, reqs_drul_[LEFT]));
- }
-}
-
-void
-Chord_tremolo_engraver::do_post_move_processing ()
-{
- reqs_drul_ [START] = 0;
-}
-
-
-void
-Chord_tremolo_engraver::do_pre_move_processing ()
-{
- typeset_beam ();
}
void
-Chord_tremolo_engraver::typeset_beam ()
+Chord_tremolo_engraver::finalize ()
{
- if (finished_beam_p_)
+ if (beam_)
{
- finished_beam_info_p_->beamify ();
- finished_beam_p_->set_beaming (finished_beam_info_p_);
- typeset_element (finished_beam_p_);
- finished_beam_p_ = 0;
- delete finished_beam_info_p_;
- finished_beam_info_p_ =0;
-
- reqs_drul_[STOP] = 0;
+ repeat_->origin ()->warning (_ ("unterminated chord tremolo"));
+ beam_->suicide ();
}
}
void
-Chord_tremolo_engraver::do_removal_processing ()
+Chord_tremolo_engraver::acknowledge_stem (Grob_info info)
{
- typeset_beam ();
- if (beam_p_)
+ if (beam_)
{
- prev_start_req_->warning (_ ("unterminated chord tremolo"));
- finished_beam_p_ = beam_p_;
- finished_beam_info_p_ = beam_info_p_;
- typeset_beam ();
- }
-}
+ Grob *s = info.grob ();
-void
-Chord_tremolo_engraver::acknowledge_element (Score_element_info info)
-{
- if (beam_p_)
- {
- if (Stem* s = dynamic_cast<Stem *> (info.elem_l_))
+ Stem::set_beaming (s, flags_, beam_dir_);
+
+ if (Stem::duration_log (s) != 1)
+ beam_->set_property ("gap-count", scm_from_int (flags_ - expected_beam_count_));
+
+ if (beam_dir_ == RIGHT)
+ beam_dir_ = LEFT;
+
+ if (info.ultimate_music_cause ()->is_mus_type ("rhythmic-event"))
+ Beam::add_stem (beam_, s);
+ else
{
- int type_i = prev_start_req_->type_i_;
- s->set_elt_property ("duration-log", gh_int2scm (intlog2 (type_i) - 2));
-
- s->set_beaming (s->flag_i (), LEFT);
- s->set_beaming ( s->flag_i (), RIGHT);
-
- /*
- URG: this sets the direction of the Stem s.
- It's amazing Mike:
-
- Stem:: type_i () ->first_head ()->get_direction () ->
- directional_element (me).set (d);
-
- */
- SCM d = s->get_elt_property ("direction");
- if (s->type_i () != 1)
- {
- int gap_i =s->flag_i () - ((s->type_i () >? 2) - 2);
- beam_p_->set_elt_property ("beam-gap", gh_int2scm(gap_i));
- }
- s->set_elt_property ("direction", d);
-
- if (Rhythmic_req* r = dynamic_cast <Rhythmic_req *> (info.req_l_))
- {
- beam_p_->add_stem (s);
- Moment stem_location = now_mom () -
- beam_start_mom_ + beam_start_location_;
- beam_info_p_->add_stem (stem_location,
- (r->duration_.durlog_i_ - 2) >? 1);
- }
+ string s = _ ("stem must have Rhythmic structure");
+ if (info.music_cause ())
+ info.music_cause ()->origin ()->warning (s);
else
- {
- String s = _ ("stem must have Rhythmic structure");
- if (info.req_l_)
- info.req_l_->warning (s);
- else
- ::warning (s);
- }
+ ::warning (s);
}
}
}
+ADD_ACKNOWLEDGER (Chord_tremolo_engraver, stem);
+ADD_TRANSLATOR (Chord_tremolo_engraver,
+ /* doc */ "Generates beams for tremolo repeats.",
+ /* create */ "Beam",
+ /* accept */ "tremolo-span-event",
+ /* read */ "",
+ /* write */ "");
projects / lilypond.git / blobdiff