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 class Multi_measure_rest_engraver : public Engraver
24 VIRTUAL_COPY_CONS(Translator);
25 Multi_measure_rest_engraver ();
28 virtual void acknowledge_element (Score_element_info i);
29 virtual void do_process_music ();
30 virtual bool do_try_music (Music*);
31 virtual void do_pre_move_processing ();
32 virtual void do_post_move_processing ();
33 virtual void do_removal_processing ();
35 Span_req * new_req_l_;
36 Span_req * busy_span_req_l_;
37 Span_req * stop_req_l_;
45 ADD_THIS_TRANSLATOR (Multi_measure_rest_engraver);
47 Multi_measure_rest_engraver::Multi_measure_rest_engraver ()
50 mmrest_p_ = lastrest_p_ =0;
51 new_req_l_ = busy_span_req_l_ = stop_req_l_ =0;
55 Multi_measure_rest_engraver::acknowledge_element (Score_element_info i)
57 Item * item = dynamic_cast<Item*> (i.elem_l_);
58 if (item && Bar::has_interface (item))
61 Multi_measure_rest::add_column (mmrest_p_,item);
63 Multi_measure_rest::add_column (lastrest_p_,item);
68 Multi_measure_rest_engraver::do_try_music (Music* req_l)
70 if (Span_req * sp = dynamic_cast<Span_req*> (req_l))
72 if (sp->span_type_str_ == "rest")
74 if (sp->span_dir_ == STOP)
78 else if (sp->span_dir_ == START && !new_req_l_)
91 Multi_measure_rest_engraver::do_process_music ()
93 if (new_req_l_ && stop_req_l_)
97 start_moment_ = now_mom ();
107 busy_span_req_l_ = new_req_l_;
111 if (busy_span_req_l_ && !mmrest_p_)
113 mmrest_p_ = new Spanner (get_property ("basicMultiMeasureRestProperties"));
115 Multi_measure_rest::set_interface (mmrest_p_);
116 Staff_symbol_referencer::set_interface (mmrest_p_);
118 announce_element (mmrest_p_, busy_span_req_l_);
120 = gh_scm2int (get_property ("currentBarNumber"));
125 Multi_measure_rest_engraver::do_pre_move_processing ()
127 SCM smp = get_property ("measurePosition");
128 Moment mp = (unsmob_moment (smp)) ? *unsmob_moment (smp) : Moment (0);
130 if (mmrest_p_ && (now_mom () >= start_moment_)
132 && (scm_ilength (mmrest_p_->get_elt_property ("columns")) >= 2))
134 typeset_element (mmrest_p_);
136 must keep mmrest_p_ around to set measures_i_
141 typeset_element (lastrest_p_);
147 busy_span_req_l_ = new_req_l_;
154 Multi_measure_rest_engraver::do_post_move_processing ()
156 SCM smp = get_property ("measurePosition");
157 Moment mp = (unsmob_moment (smp)) ? *unsmob_moment (smp) : Moment (0);
159 if (mmrest_p_ && !mp)
161 lastrest_p_ = mmrest_p_;
162 int cur = gh_scm2int (get_property ("currentBarNumber"));
163 lastrest_p_->set_elt_property ("measure-count",
164 gh_int2scm (cur - start_measure_i_));
171 Multi_measure_rest_engraver::do_removal_processing ()
174 typeset_element (mmrest_p_);
176 typeset_element (lastrest_p_);