2 ' separating-line-group-engraver.cc -- implement Separating_line_group_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1998--2002 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"
16 #include "note-spacing.hh"
17 #include "group-interface.hh"
21 Item * staff_spacing_;
22 Link_array<Item> note_spacings_;
31 return !staff_spacing_ && !note_spacings_.size ();
35 note_spacings_.clear();
39 class Separating_line_group_engraver : public Engraver
43 Item * musical_malt_p_;
44 Item * last_musical_malt_p_;
46 Spacings current_spacings_;
47 Spacings last_spacings_;
49 Spanner * sep_span_p_;
51 virtual void acknowledge_grob (Grob_info);
52 virtual void initialize ();
53 virtual void finalize ();
54 virtual void stop_translation_timestep ();
55 virtual void start_translation_timestep ();
57 TRANSLATOR_DECLARATIONS(Separating_line_group_engraver);
60 Separating_line_group_engraver::Separating_line_group_engraver ()
68 Separating_line_group_engraver::initialize ()
70 sep_span_p_ = new Spanner (get_property ("SeparatingGroupSpanner"));
72 announce_grob(sep_span_p_, SCM_EOL);
73 sep_span_p_->set_bound (LEFT, unsmob_grob (get_property ("currentCommandColumn")));
77 Separating_line_group_engraver::finalize ()
79 SCM ccol = get_property ("currentCommandColumn");
80 Grob *column = unsmob_grob (ccol);
82 sep_span_p_->set_bound (RIGHT, unsmob_grob (ccol));
83 typeset_grob (sep_span_p_);
86 for (int i= 0 ; i < last_spacings_.note_spacings_.size(); i++)
88 Pointer_group_interface::add_grob (last_spacings_.note_spacings_[i],
89 ly_symbol2scm ("right-items" ),
93 if(last_spacings_.staff_spacing_
94 && last_spacings_.staff_spacing_->column_l () == column)
96 last_spacings_.staff_spacing_->suicide ();
101 Separating_line_group_engraver::acknowledge_grob (Grob_info i)
103 Item * it = dynamic_cast <Item *> (i.grob_l_);
106 if (it->get_parent (X_AXIS)
107 && it->get_parent (X_AXIS)
108 ->has_extent_callback_b(Axis_group_interface::group_extent_callback_proc, X_AXIS))
113 if (to_boolean (it->get_grob_property ("no-spacing-rods")))
116 if (Note_spacing::has_interface (it))
118 current_spacings_.note_spacings_.push (it);
122 bool ib =Item::breakable_b (it);
123 Item *&p_ref_ (ib ? break_malt_p_
128 p_ref_ = new Item (get_property ("SeparationItem"));
131 p_ref_->set_grob_property ("breakable", SCM_BOOL_T);
132 announce_grob(p_ref_, SCM_EOL);
134 if (p_ref_ == break_malt_p_)
136 Item *it = new Item (get_property ("StaffSpacing"));
137 current_spacings_.staff_spacing_ = it;
138 it->set_grob_property ("left-items", gh_cons (break_malt_p_->self_scm (), SCM_EOL));
140 announce_grob(it, SCM_EOL);
142 if (int i = last_spacings_.note_spacings_.size ())
145 Pointer_group_interface::add_grob (last_spacings_.note_spacings_[i],
146 ly_symbol2scm ("right-items"),
150 else if (last_spacings_.staff_spacing_)
153 last_spacings_.staff_spacing_->set_grob_property ("right-items",
154 gh_cons (break_malt_p_->self_scm(), SCM_EOL));
159 Separation_item::add_item (p_ref_,it);
163 Separating_line_group_engraver::start_translation_timestep ()
169 Separating_line_group_engraver::stop_translation_timestep ()
173 Separating_group_spanner::add_spacing_unit (sep_span_p_, break_malt_p_);
174 typeset_grob (break_malt_p_);
179 if (Item * sp = current_spacings_.staff_spacing_)
182 TODO: should really look at the left-items of following
186 Pointer_group_interface::add_grob (sp, ly_symbol2scm ("right-items"),
193 if (!current_spacings_.empty ())
195 last_spacings_ = current_spacings_;
198 current_spacings_.clear ();
202 Separating_group_spanner::add_spacing_unit (sep_span_p_, musical_malt_p_);
203 typeset_grob (musical_malt_p_);
210 ENTER_DESCRIPTION(Separating_line_group_engraver,
211 /* descr */ "Generates objects for computing spacing parameters.",
212 /* creats*/ "SeparationItem SeparatingGroupSpanner",
213 /* acks */ "item-interface",