2 separating-line-group-engraver.cc -- implement Separating_line_group_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1998--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
11 #include "separating-group-spanner.hh"
12 #include "separation-item.hh"
13 #include "paper-column.hh"
14 #include "output-def.hh"
15 #include "axis-group-interface.hh"
16 #include "note-spacing.hh"
17 #include "accidental-placement.hh"
20 #include "grob-array.hh"
21 #include "pointer-group-interface.hh"
23 #include "translator.icc"
28 vector<Item*> note_spacings_;
35 bool is_empty () const
37 return !staff_spacing_ && !note_spacings_.size ();
42 note_spacings_.clear ();
46 class Separating_line_group_engraver : public Engraver
51 Item *last_musical_item_;
53 Spacings current_spacings_;
54 Spacings last_spacings_;
58 DECLARE_ACKNOWLEDGER (item);
59 void process_music ();
60 virtual void finalize ();
61 void stop_translation_timestep ();
62 void start_translation_timestep ();
64 TRANSLATOR_DECLARATIONS (Separating_line_group_engraver);
67 Separating_line_group_engraver::Separating_line_group_engraver ()
75 Separating_line_group_engraver::process_music ()
79 sep_span_ = make_spanner ("SeparatingGroupSpanner", SCM_EOL);
81 sep_span_->set_bound (LEFT, unsmob_grob (get_property ("currentCommandColumn")));
85 Separating_line_group_engraver::finalize ()
90 SCM ccol = get_property ("currentCommandColumn");
91 Grob *column = unsmob_grob (ccol);
93 sep_span_->set_bound (RIGHT, unsmob_grob (ccol));
96 for (vsize i = 0; i < last_spacings_.note_spacings_.size (); i++)
98 Pointer_group_interface::add_grob (last_spacings_.note_spacings_[i],
99 ly_symbol2scm ("right-items"),
103 if (last_spacings_.staff_spacing_
104 && last_spacings_.staff_spacing_->get_column () == column)
105 last_spacings_.staff_spacing_->suicide ();
109 Separating_line_group_engraver::acknowledge_item (Grob_info i)
111 Item *it = dynamic_cast<Item *> (i.grob ());
114 if (it->get_parent (X_AXIS)
115 && Axis_group_interface::has_axis (it->get_parent (X_AXIS), X_AXIS))
118 if (to_boolean (it->get_property ("no-spacing-rods")))
121 if (Note_spacing::has_interface (it))
123 current_spacings_.note_spacings_.push_back (it);
127 bool ib = Item::is_non_musical (it);
128 Item *&p_ref_ (ib ? break_item_
133 p_ref_ = make_item ("SeparationItem", SCM_EOL);
137 p_ref_->set_property ("non-musical", SCM_BOOL_T);
138 context ()->set_property ("breakableSeparationItem", p_ref_->self_scm ());
141 if (to_boolean (get_property ("createSpacing"))
142 && p_ref_ == break_item_)
144 Item *it = make_item ("StaffSpacing", SCM_EOL);
145 current_spacings_.staff_spacing_ = it;
146 Pointer_group_interface::add_grob (it, ly_symbol2scm ("left-items"),
149 if (int i = last_spacings_.note_spacings_.size ())
152 Pointer_group_interface::add_grob (last_spacings_.note_spacings_[i],
153 ly_symbol2scm ("right-items"),
156 else if (last_spacings_.staff_spacing_)
158 SCM ri = last_spacings_.staff_spacing_->get_object ("right-items");
159 Grob_array *ga = unsmob_grob_array (ri);
162 SCM ga_scm = Grob_array::make_array ();
163 last_spacings_.staff_spacing_->set_object ("right-items", ga_scm);
164 ga = unsmob_grob_array (ga_scm);
168 ga->add (break_item_);
173 if (Accidental_placement::has_interface (it))
174 Separation_item::add_conditional_item (p_ref_, it);
176 Separation_item::add_item (p_ref_, it);
180 Separating_line_group_engraver::start_translation_timestep ()
184 context ()->unset_property (ly_symbol2scm ("breakableSeparationItem"));
190 Separating_line_group_engraver::stop_translation_timestep ()
193 Separating_group_spanner::add_spacing_unit (sep_span_, break_item_);
195 if (Item *sp = current_spacings_.staff_spacing_)
198 TODO: should really look at the left-items of following
202 Pointer_group_interface::add_grob (sp, ly_symbol2scm ("right-items"),
206 if (!current_spacings_.is_empty ())
207 last_spacings_ = current_spacings_;
209 current_spacings_.clear ();
212 Separating_group_spanner::add_spacing_unit (sep_span_, musical_item_);
217 ADD_ACKNOWLEDGER (Separating_line_group_engraver, item);
218 ADD_TRANSLATOR (Separating_line_group_engraver,
219 /* doc */ "Generates objects for computing spacing parameters.",
223 "SeparatingGroupSpanner "
225 /* read */ "createSpacing",
226 /* write */ "breakableSeparationItem");