2 multi_measure_rest-engraver.cc -- implement Multi_measure_rest_engraver
4 (c) 1998--2001 Jan Nieuwenhuizen <janneke@gnu.org>
5 Han-Wen Nienhuys <hanwen@cs.uu.nl>
8 #include "musical-request.hh"
9 #include "multi-measure-rest.hh"
10 #include "paper-column.hh"
11 #include "engraver-group-engraver.hh"
13 #include "staff-symbol-referencer.hh"
14 #include "engraver.hh"
19 The name says it all: make multi measure rests
21 FIXME? The MM rest engraver must be able to see bar lines, so it won't
22 work at Voice level. Not a problem in practice, but aesthetically pleasing?
25 class Multi_measure_rest_engraver : public Engraver
28 VIRTUAL_COPY_CONS (Translator);
29 Multi_measure_rest_engraver ();
32 virtual void acknowledge_grob (Grob_info i);
33 virtual bool try_music (Music*);
34 virtual void process_music ();
35 virtual void stop_translation_timestep ();
36 virtual void start_translation_timestep ();
37 virtual void finalize ();
40 Span_req * new_req_l_;
41 Span_req * busy_span_req_l_;
42 Span_req * stop_req_l_;
50 ADD_THIS_TRANSLATOR (Multi_measure_rest_engraver);
52 Multi_measure_rest_engraver::Multi_measure_rest_engraver ()
55 mmrest_p_ = lastrest_p_ =0;
56 new_req_l_ = busy_span_req_l_ = stop_req_l_ =0;
60 Multi_measure_rest_engraver::acknowledge_grob (Grob_info i)
62 Item * item = dynamic_cast<Item*> (i.elem_l_);
63 if (item && Bar::has_interface (item))
66 Multi_measure_rest::add_column (mmrest_p_,item);
68 Multi_measure_rest::add_column (lastrest_p_,item);
73 Multi_measure_rest_engraver::try_music (Music* req_l)
75 if (Span_req * sp = dynamic_cast<Span_req*> (req_l))
78 if (scm_equal_p (sp->get_mus_property ("span-type"),
79 ly_str02scm ("rest")) == SCM_BOOL_T)
81 if (sp->get_span_dir () == STOP)
85 else if (sp->get_span_dir () == START && !new_req_l_)
96 Multi_measure_rest_engraver::process_music ()
98 if (new_req_l_ && stop_req_l_)
102 start_moment_ = now_mom ();
112 busy_span_req_l_ = new_req_l_;
116 if (busy_span_req_l_ && !mmrest_p_)
118 mmrest_p_ = new Spanner (get_property ("MultiMeasureRest"));
120 Multi_measure_rest::set_interface (mmrest_p_);
121 Staff_symbol_referencer::set_interface (mmrest_p_);
123 announce_grob (mmrest_p_, busy_span_req_l_);
125 = gh_scm2int (get_property ("currentBarNumber"));
132 Multi_measure_rest_engraver::stop_translation_timestep ()
134 SCM smp = get_property ("measurePosition");
135 Moment mp = (unsmob_moment (smp)) ? *unsmob_moment (smp) : Moment (0);
137 if (mmrest_p_ && (now_mom () >= start_moment_)
139 && (scm_ilength (mmrest_p_->get_grob_property ("columns")) >= 2))
141 typeset_grob (mmrest_p_);
143 we must keep mmrest_p_ around to set measure-count, so
144 no mmrest_p_ = 0 here.
151 if (scm_ilength (lastrest_p_->get_grob_property ("columns")) >= 2
152 && lastrest_p_->get_bound (LEFT) && lastrest_p_->get_bound (RIGHT)
153 && lastrest_p_->get_bound (LEFT) != lastrest_p_->get_bound (RIGHT))
154 typeset_grob (lastrest_p_);
160 busy_span_req_l_ = new_req_l_;
167 Multi_measure_rest_engraver::start_translation_timestep ()
169 SCM smp = get_property ("measurePosition");
170 Moment mp = (unsmob_moment (smp)) ? *unsmob_moment (smp) : Moment (0);
172 if (mmrest_p_ && !mp)
174 lastrest_p_ = mmrest_p_;
175 int cur = gh_scm2int (get_property ("currentBarNumber"));
176 lastrest_p_->set_grob_property ("measure-count",
177 gh_int2scm (cur - start_measure_i_));
184 Multi_measure_rest_engraver::finalize ()
187 typeset_grob (mmrest_p_);
189 typeset_grob (lastrest_p_);