2 ' separating-line-group-engraver.cc -- implement Separating_line_group_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1998--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "separating-group-spanner.hh"
11 #include "separation-item.hh"
12 #include "paper-column.hh"
13 #include "paper-def.hh"
14 #include "engraver.hh"
15 #include "axis-group-interface.hh"
17 class Separating_line_group_engraver : public Engraver
21 Item * musical_malt_p_;
24 malt_p_ : we used to have a Single_malt_grouping_item
27 Item * last_step_musical_malt_p_;
29 Spanner * sep_span_p_;
31 virtual void acknowledge_grob (Grob_info);
32 virtual void initialize ();
33 virtual void finalize ();
34 virtual void stop_translation_timestep ();
36 Separating_line_group_engraver ();
37 VIRTUAL_COPY_CONS (Translator);
40 Separating_line_group_engraver::Separating_line_group_engraver ()
42 last_step_musical_malt_p_ = 0;
49 Separating_line_group_engraver::initialize ()
51 sep_span_p_ = new Spanner (get_property ("SeparatingGroupSpanner"));
53 announce_grob (sep_span_p_, 0);
54 sep_span_p_->set_bound (LEFT, unsmob_grob (get_property ("currentCommandColumn")));
58 Separating_line_group_engraver::finalize ()
60 sep_span_p_->set_bound (RIGHT, unsmob_grob (get_property ("currentCommandColumn")));
61 typeset_grob (sep_span_p_);
66 Separating_line_group_engraver::acknowledge_grob (Grob_info i)
68 Item * it = dynamic_cast <Item *> (i.elem_l_);
71 if (it->parent_l (X_AXIS)
72 && it->parent_l (X_AXIS)->has_extent_callback_b
73 (Axis_group_interface::group_extent_callback_proc, X_AXIS))
77 bool ib =Item::breakable_b (it);
78 Item *&p_ref_ (ib ? break_malt_p_
84 (get_property ("SeparationItem"));
87 p_ref_->set_grob_property ("breakable", SCM_BOOL_T);
88 announce_grob (p_ref_, 0);
90 Separation_item::add_item (p_ref_,it);
94 Separating_line_group_engraver::stop_translation_timestep ()
98 Separating_group_spanner::add_spacing_unit (sep_span_p_, break_malt_p_);
100 typeset_grob (break_malt_p_);
106 Separating_group_spanner::add_spacing_unit (sep_span_p_, musical_malt_p_);
108 if (last_step_musical_malt_p_)
111 last_step_musical_malt_p_->column_l();
112 SCM newtup = gh_cons (last_step_musical_malt_p_->self_scm (),
113 musical_malt_p_->self_scm ());
114 col->set_grob_property ("spacing-sequence",
116 col->get_grob_property ("spacing-sequence")));
119 typeset_grob (musical_malt_p_);
121 last_step_musical_malt_p_ = musical_malt_p_;
129 ADD_THIS_TRANSLATOR (Separating_line_group_engraver);