2 extender-engraver.cc -- implement Extender_engraver
4 (c) 1998 Jan Nieuwenhuizen <janneke@gnu.org>
8 #include "musical-request.hh"
9 #include "extender-engraver.hh"
10 #include "extender-spanner.hh"
11 #include "text-def.hh"
12 #include "score-column.hh"
13 #include "text-item.hh"
15 ADD_THIS_TRANSLATOR (Extender_engraver);
17 Extender_engraver::Extender_engraver ()
19 extender_spanner_p_ = 0;
20 span_reqs_drul_[RIGHT] = span_reqs_drul_[LEFT] = 0;
24 Extender_engraver::acknowledge_element (Score_element_info i)
26 Text_item* t = (dynamic_cast<Text_item*> (i.elem_l_));
29 if (!extender_spanner_p_)
31 if (!span_reqs_drul_[LEFT])
34 if (!extender_spanner_p_->textitem_l_drul_[LEFT])
35 extender_spanner_p_->set_textitem (LEFT, t);
37 if (span_reqs_drul_[RIGHT] && !extender_spanner_p_->textitem_l_drul_[RIGHT])
38 extender_spanner_p_->set_textitem (RIGHT, t);
42 Extender_engraver::do_try_music (Music* req_l)
44 if (Extender_req* p = dynamic_cast <Extender_req *> (req_l))
46 if (bool (extender_spanner_p_) == bool (p->spantype_ == START))
49 Direction d = (!extender_spanner_p_) ? LEFT : RIGHT;
50 if (span_reqs_drul_[d] && !span_reqs_drul_[d]->equal_b (p))
53 span_reqs_drul_[d] = p;
54 span_mom_drul_[d] = get_staff_info ().musical_l ()->when ();
61 Extender_engraver::do_removal_processing ()
63 if (extender_spanner_p_)
65 span_reqs_drul_[LEFT]->warning (_ ("unterminated extender"));
66 extender_spanner_p_->unlink ();
67 delete extender_spanner_p_;
68 extender_spanner_p_ = 0;
69 span_reqs_drul_[RIGHT] = span_reqs_drul_[LEFT] = 0;
74 Extender_engraver::do_process_requests ()
76 if (extender_spanner_p_ || !span_reqs_drul_[LEFT])
79 extender_spanner_p_ = new Extender_spanner;
81 announce_element (Score_element_info (extender_spanner_p_, span_reqs_drul_[LEFT]));
85 Extender_engraver::do_pre_move_processing ()
87 if (!extender_spanner_p_ || !span_reqs_drul_[RIGHT])
90 typeset_element (extender_spanner_p_);
92 extender_spanner_p_ = 0;
93 span_reqs_drul_[RIGHT] = span_reqs_drul_[LEFT] = 0;