source file of the GNU LilyPond music typesetter
- (c) 1999--2005 Jan Nieuwenhuizen <janneke@gnu.org>
+ (c) 1999--2006 Jan Nieuwenhuizen <janneke@gnu.org>
*/
#include "engraver.hh"
#include "translator.icc"
-
class Auto_beam_engraver : public Engraver
{
TRANSLATOR_DECLARATIONS (Auto_beam_engraver);
protected:
- PRECOMPUTED_VIRTUAL void stop_translation_timestep ();
- PRECOMPUTED_VIRTUAL void start_translation_timestep ();
- PRECOMPUTED_VIRTUAL void process_music ();
+ void stop_translation_timestep ();
+ void start_translation_timestep ();
+ void process_music ();
virtual bool try_music (Music *);
virtual void finalize ();
- virtual void acknowledge_grob (Grob_info);
- PRECOMPUTED_VIRTUAL void process_acknowledged ();
+ virtual void derived_mark () const;
+
+ DECLARE_ACKNOWLEDGER (rest);
+ DECLARE_ACKNOWLEDGER (beam);
+ DECLARE_ACKNOWLEDGER (bar_line);
+ DECLARE_ACKNOWLEDGER (stem);
+
+ void process_acknowledged ();
private:
bool test_moment (Direction, Moment);
*/
Moment shortest_mom_;
Spanner *finished_beam_;
- Link_array<Item> *stems_;
+ vector<Item*> *stems_;
int process_acknowledged_count_;
Moment last_add_mom_;
// We act as if beam were created, and start a grouping anyway.
Beaming_info_list *grouping_;
- SCM beam_settings_; // ugh. should protect ?
+ SCM beam_settings_;
Beaming_info_list *finished_grouping_;
+
+ void check_bar_property ();
};
+void
+Auto_beam_engraver::derived_mark () const
+{
+ scm_gc_mark (beam_settings_);
+}
+
+void
+Auto_beam_engraver::check_bar_property ()
+{
+ /* Duplicated from process_music (), since
+ Repeat_acknowledge_engraver::process_music () may also set whichBar. */
+
+ Moment now = now_mom ();
+ if (scm_is_string (get_property ("whichBar"))
+ && beam_start_moment_ < now)
+ {
+ consider_end (shortest_mom_);
+ junk_beam ();
+ }
+}
+
void
Auto_beam_engraver::process_music ()
{
Auto_beam_engraver::Auto_beam_engraver ()
{
forbid_ = 0;
-process_acknowledged_count_ = 0;
+ process_acknowledged_count_ = 0;
stems_ = 0;
shortest_mom_ = Moment (Rational (1, 8));
finished_beam_ = 0;
test.smobbed_copy ())
!= SCM_BOOL_F;
}
-
+
void
Auto_beam_engraver::consider_begin (Moment test_mom)
{
if (to_boolean (get_property ("skipTypesetting")))
return 0;
- Spanner *beam = new Spanner (beam_settings_, context ()->get_grob_key ("Beam"));
- for (int i = 0; i < stems_->size (); i++)
- {
- /*
- watch out for stem tremolos and abbreviation beams
- */
- if (Stem::get_beam ((*stems_)[i]))
- {
- scm_gc_unprotect_object (beam->self_scm ());
- return 0;
- }
- Beam::add_stem (beam, (*stems_)[i]);
- }
+ for (vsize i = 0; i < stems_->size (); i++)
+ if (Stem::get_beam ((*stems_)[i]))
+ return 0;
+
+ /*
+ Can't use make_spanner_from_properties() because we have to use
+ beam_settings_.
+ */
+ Spanner *beam = new Spanner (beam_settings_,
+ context ()->get_grob_key ("Beam"));
+
+ for (vsize i = 0; i < stems_->size (); i++)
+ Beam::add_stem (beam, (*stems_)[i]);
announce_grob (beam, (*stems_)[0]->self_scm ());
return;
}
- stems_ = new Link_array<Item>;
+ stems_ = new vector<Item*>;
grouping_ = new Beaming_info_list;
beam_settings_ = updated_grob_properties (context (), ly_symbol2scm ("Beam"));
Auto_beam_engraver::end_beam ()
{
if (stems_->size () < 2)
- {
- junk_beam ();
- }
+ junk_beam ();
else
{
finished_beam_ = create_beam ();
{
Moment now = now_mom ();
if (extend_mom_ < now)
- {
- end_beam ();
- }
+ end_beam ();
}
forbid_ = 0;
}
junk_beam ();
}
+
void
-Auto_beam_engraver::acknowledge_grob (Grob_info info)
+Auto_beam_engraver::acknowledge_beam (Grob_info info)
{
- /* Duplicated from process_music (), since
- Repeat_acknowledge_engraver::process_music () may also set whichBar. */
+ (void)info;
+ check_bar_property ();
+ if (stems_)
+ end_beam ();
+}
- Moment now = now_mom ();
- if (scm_is_string (get_property ("whichBar"))
- && beam_start_moment_ < now)
- {
- consider_end (shortest_mom_);
- junk_beam ();
- }
+void
+Auto_beam_engraver::acknowledge_bar_line (Grob_info info)
+{
+ (void)info;
+ check_bar_property ();
+ if (stems_)
+ end_beam ();
+}
+void
+Auto_beam_engraver::acknowledge_rest (Grob_info info)
+{
+ (void)info;
+ check_bar_property ();
if (stems_)
+ end_beam ();
+}
+
+void
+Auto_beam_engraver::acknowledge_stem (Grob_info info)
+{
+ check_bar_property ();
+ Item *stem = dynamic_cast<Item *> (info.grob ());
+ Music *m = info.ultimate_music_cause ();
+ if (!m->is_mus_type ("rhythmic-event"))
{
- if (Beam::has_interface (info.grob ()))
- {
- end_beam ();
- }
- else if (Bar_line::has_interface (info.grob ()))
- {
- end_beam ();
- }
- else if (Rest::has_interface (info.grob ()))
- {
- end_beam ();
- }
+ programming_error ("stem must have rhythmic structure");
+ return;
}
- if (Stem::has_interface (info.grob ()))
+ /*
+ Don't (start) auto-beam over empty stems; skips or rests
+ */
+ if (!Stem::head_count (stem))
{
- Item *stem = dynamic_cast<Item *> (info.grob ());
- Music *m = info.music_cause ();
- if (!m->is_mus_type ("rhythmic-event"))
- {
- programming_error ("stem must have rhythmic structure");
- return;
- }
-
- /*
- Don't (start) auto-beam over empty stems; skips or rests
- */
- if (!Stem::head_count (stem))
- {
- if (stems_)
- end_beam ();
- return;
- }
+ if (stems_)
+ end_beam ();
+ return;
+ }
- if (Stem::get_beam (stem))
- {
- if (stems_)
- junk_beam ();
- return;
- }
+ if (Stem::get_beam (stem))
+ {
+ if (stems_)
+ junk_beam ();
+ return;
+ }
- int durlog = unsmob_duration (m->get_property ("duration"))->duration_log ();
+ int durlog = unsmob_duration (m->get_property ("duration"))->duration_log ();
- if (durlog <= 2)
- {
- if (stems_)
- end_beam ();
- return;
- }
+ if (durlog <= 2)
+ {
+ if (stems_)
+ end_beam ();
+ return;
+ }
- /*
- ignore grace notes.
- */
- if (bool (beam_start_location_.grace_part_) != bool (now.grace_part_))
- return;
+ /*
+ ignore grace notes.
+ */
+ Moment now = now_mom ();
+ if (bool (beam_start_location_.grace_part_) != bool (now.grace_part_))
+ return;
- Moment dur = unsmob_duration (m->get_property ("duration"))->get_length ();
+ Moment dur = unsmob_duration (m->get_property ("duration"))->get_length ();
- consider_end (dur);
- consider_begin (dur);
+ consider_end (dur);
+ consider_begin (dur);
- if (dur < shortest_mom_)
- shortest_mom_ = dur;
+ if (dur < shortest_mom_)
+ shortest_mom_ = dur;
- if (!stems_)
- return;
+ if (!stems_)
+ return;
- grouping_->add_stem (now - beam_start_moment_ + beam_start_location_,
- durlog - 2);
- stems_->push (stem);
- last_add_mom_ = now;
- extend_mom_ = max (extend_mom_, now) + m->get_length ();
- }
+ grouping_->add_stem (now - beam_start_moment_ + beam_start_location_,
+ durlog - 2);
+ stems_->push_back (stem);
+ last_add_mom_ = now;
+ extend_mom_ = max (extend_mom_, now) + m->get_length ();
}
void
Auto_beam_engraver::process_acknowledged ()
{
if (extend_mom_ > now_mom ())
- return ;
+ return;
if (!process_acknowledged_count_)
{
Moment now = now_mom ();
if ((extend_mom_ < now)
|| ((extend_mom_ == now) && (last_add_mom_ != now)))
- {
- end_beam ();
- }
+ end_beam ();
else if (!stems_->size ())
- {
- junk_beam ();
- }
+ junk_beam ();
}
}
process_acknowledged_count_++;
}
+ADD_ACKNOWLEDGER (Auto_beam_engraver, stem);
+ADD_ACKNOWLEDGER (Auto_beam_engraver, bar_line);
+ADD_ACKNOWLEDGER (Auto_beam_engraver, beam);
+ADD_ACKNOWLEDGER (Auto_beam_engraver, rest);
ADD_TRANSLATOR (Auto_beam_engraver,
- /* descr */ "Generate beams based on measure characteristics and observed "
+ /* doc */ "Generate beams based on measure characteristics and observed "
"Stems. Uses beatLength, measureLength and measurePosition to decide "
"when to start and stop a beam. Overriding beaming is done through "
"@ref{Stem_engraver} properties @code{stemLeftBeamCount} and "
"@code{stemRightBeamCount}. ",
- /* creats*/ "Beam",
- /* accepts */ "beam-forbid-event",
- /* acks */ "stem-interface rest-interface beam-interface bar-line-interface",
- /* reads */ "autoBeaming autoBeamSettings beatLength subdivideBeams",
+ /* create */ "Beam",
+ /* accept */ "beam-forbid-event",
+ /* read */ "autoBeaming autoBeamSettings beatLength subdivideBeams",
/* write */ "");