2 score-align-reg.cc -- implement Score_priority_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "horizontal-group-item.hh"
11 #include "score-priority-engraver.hh"
13 #include "assoc-iter.hh"
14 #include "break-align-item.hh"
17 Score_priority_engraver::Score_priority_engraver()
22 Score_priority_engraver::do_pre_move_processing()
24 for (Assoc_iter<int, Horizontal_group_item*> i(align_p_assoc_); i.ok() ; i++)
28 typeset_element (i.val ());
32 align_p_assoc_.clear ();
36 Score_priority_engraver::acknowledge_element (Score_element_info inf)
38 Item * item_l = dynamic_cast <Item *> (inf.elem_l_);
39 if (item_l && item_l->breakable_b_ && !item_l->empty_b ())
42 Don't try to eat up our (probable) parent.
44 if (inf.origin_grav_l_arr_.size () <= 1 &&
45 dynamic_cast<Break_align_item *> (item_l))
49 int priority =item_l->break_priority_i_;
50 Horizontal_group_item * hg =0;
51 if (!align_p_assoc_.elem_b(priority))
53 hg = new Horizontal_group_item;
54 announce_element (Score_element_info (hg,0));
55 align_p_assoc_[priority] = hg;
56 hg->break_priority_i_ = priority;
57 hg->breakable_b_ = true;
60 hg = align_p_assoc_[priority];
62 Score_element * unbound_elem = inf.elem_l_;
64 while (unbound_elem->axis_group_l_a_[X_AXIS])
66 /* We might have added inf.elem_l_ earlier because we added one
67 of its children. We don't want to add ourselves to ourself
69 if (unbound_elem->axis_group_l_a_[X_AXIS] == hg)
71 unbound_elem = dynamic_cast<Score_element*> (unbound_elem->axis_group_l_a_[X_AXIS]);
74 hg->add_element (unbound_elem);
78 IMPLEMENT_IS_TYPE_B1(Score_priority_engraver, Engraver);
79 ADD_THIS_TRANSLATOR(Score_priority_engraver);