2 multi_measure_rest-engraver.cc -- implement Multi_measure_rest_engraver
4 (c) 1998--2000 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_element (Score_element_info i);
33 virtual void do_process_music ();
34 virtual bool do_try_music (Music*);
35 virtual void do_pre_move_processing ();
36 virtual void do_post_move_processing ();
37 virtual void do_removal_processing ();
39 Span_req * new_req_l_;
40 Span_req * busy_span_req_l_;
41 Span_req * stop_req_l_;
49 ADD_THIS_TRANSLATOR (Multi_measure_rest_engraver);
51 Multi_measure_rest_engraver::Multi_measure_rest_engraver ()
54 mmrest_p_ = lastrest_p_ =0;
55 new_req_l_ = busy_span_req_l_ = stop_req_l_ =0;
59 Multi_measure_rest_engraver::acknowledge_element (Score_element_info i)
61 Item * item = dynamic_cast<Item*> (i.elem_l_);
62 if (item && Bar::has_interface (item))
65 Multi_measure_rest::add_column (mmrest_p_,item);
67 Multi_measure_rest::add_column (lastrest_p_,item);
72 Multi_measure_rest_engraver::do_try_music (Music* req_l)
74 if (Span_req * sp = dynamic_cast<Span_req*> (req_l))
76 if (sp->span_type_str_ == "rest")
78 if (sp->span_dir_ == STOP)
82 else if (sp->span_dir_ == START && !new_req_l_)
95 Multi_measure_rest_engraver::do_process_music ()
97 if (new_req_l_ && stop_req_l_)
101 start_moment_ = now_mom ();
111 busy_span_req_l_ = new_req_l_;
115 if (busy_span_req_l_ && !mmrest_p_)
117 mmrest_p_ = new Spanner (get_property ("basicMultiMeasureRestProperties"));
119 Multi_measure_rest::set_interface (mmrest_p_);
120 Staff_symbol_referencer::set_interface (mmrest_p_);
122 announce_element (mmrest_p_, busy_span_req_l_);
124 = gh_scm2int (get_property ("currentBarNumber"));
129 Multi_measure_rest_engraver::do_pre_move_processing ()
131 SCM smp = get_property ("measurePosition");
132 Moment mp = (unsmob_moment (smp)) ? *unsmob_moment (smp) : Moment (0);
134 if (mmrest_p_ && (now_mom () >= start_moment_)
136 && (scm_ilength (mmrest_p_->get_elt_property ("columns")) >= 2))
138 typeset_element (mmrest_p_);
140 must keep mmrest_p_ around to set measures_i_
145 typeset_element (lastrest_p_);
151 busy_span_req_l_ = new_req_l_;
158 Multi_measure_rest_engraver::do_post_move_processing ()
160 SCM smp = get_property ("measurePosition");
161 Moment mp = (unsmob_moment (smp)) ? *unsmob_moment (smp) : Moment (0);
163 if (mmrest_p_ && !mp)
165 lastrest_p_ = mmrest_p_;
166 int cur = gh_scm2int (get_property ("currentBarNumber"));
167 lastrest_p_->set_elt_property ("measure-count",
168 gh_int2scm (cur - start_measure_i_));
175 Multi_measure_rest_engraver::do_removal_processing ()
178 typeset_element (mmrest_p_);
180 typeset_element (lastrest_p_);