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 IMPLEMENT_IS_TYPE_B1 (Extender_engraver,Engraver);
16 ADD_THIS_TRANSLATOR (Extender_engraver);
18 Extender_engraver::Extender_engraver ()
20 extender_spanner_p_ = 0;
21 span_reqs_drul_[RIGHT] = span_reqs_drul_[LEFT] = 0;
25 Extender_engraver::acknowledge_element (Score_element_info i)
27 Text_item* t = (dynamic_cast<Text_item*> (i.elem_l_));
30 if (!extender_spanner_p_)
32 if (!span_reqs_drul_[LEFT])
35 if (!extender_spanner_p_->textitem_l_drul_[LEFT])
36 extender_spanner_p_->set_textitem (LEFT, t);
38 if (span_reqs_drul_[RIGHT] && !extender_spanner_p_->textitem_l_drul_[RIGHT])
39 extender_spanner_p_->set_textitem (RIGHT, t);
43 Extender_engraver::do_try_request (Request* req_l)
45 Extender_req* p = dynamic_cast <Extender_req *> (req_l);
49 if (bool (extender_spanner_p_) == bool (p->spantype == Span_req::START))
52 Direction d = (!extender_spanner_p_) ? LEFT : RIGHT;
53 if (span_reqs_drul_[d] && !span_reqs_drul_[d]->equal_b (req_l))
56 span_reqs_drul_[d] = p;
57 span_mom_drul_[d] = get_staff_info ().musical_l ()->when ();
62 Extender_engraver::do_removal_processing ()
64 if (extender_spanner_p_)
66 span_reqs_drul_[LEFT]->warning (_ ("unterminated extender"));
67 extender_spanner_p_->unlink ();
68 delete extender_spanner_p_;
69 extender_spanner_p_ = 0;
70 span_reqs_drul_[RIGHT] = span_reqs_drul_[LEFT] = 0;
75 Extender_engraver::do_process_requests ()
77 if (extender_spanner_p_ || !span_reqs_drul_[LEFT])
80 extender_spanner_p_ = new Extender_spanner;
82 announce_element (Score_element_info (extender_spanner_p_, span_reqs_drul_[LEFT]));
86 Extender_engraver::do_pre_move_processing ()
88 if (!extender_spanner_p_ || !span_reqs_drul_[RIGHT])
91 typeset_element (extender_spanner_p_);
93 extender_spanner_p_ = 0;
94 span_reqs_drul_[RIGHT] = span_reqs_drul_[LEFT] = 0;