2 separating-line-group-engraver.cc -- implement Separating_line_group_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1998--2007 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_;
56 DECLARE_ACKNOWLEDGER (item);
57 void stop_translation_timestep ();
58 void start_translation_timestep ();
60 TRANSLATOR_DECLARATIONS (Separating_line_group_engraver);
63 Separating_line_group_engraver::Separating_line_group_engraver ()
70 Separating_line_group_engraver::acknowledge_item (Grob_info i)
73 if (it->get_parent (X_AXIS)
74 && it->get_parent (X_AXIS) == it->get_parent (Y_AXIS)
75 && Axis_group_interface::has_axis (it->get_parent (X_AXIS), X_AXIS)
76 && Axis_group_interface::has_axis (it->get_parent (Y_AXIS), Y_AXIS))
79 if (to_boolean (it->get_property ("no-spacing-rods")))
82 if (Note_spacing::has_interface (it))
84 current_spacings_.note_spacings_.push_back (it);
88 bool ib = Item::is_non_musical (it);
89 Item *&p_ref_ (ib ? break_item_
94 p_ref_ = make_item ("SeparationItem", SCM_EOL);
98 p_ref_->set_property ("non-musical", SCM_BOOL_T);
99 context ()->set_property ("breakableSeparationItem", p_ref_->self_scm ());
102 if (to_boolean (get_property ("createSpacing"))
103 && p_ref_ == break_item_)
105 Item *it = make_item ("StaffSpacing", SCM_EOL);
106 current_spacings_.staff_spacing_ = it;
107 Pointer_group_interface::add_grob (it, ly_symbol2scm ("left-items"),
110 if (!last_spacings_.note_spacings_.size ()
111 && last_spacings_.staff_spacing_)
113 SCM ri = last_spacings_.staff_spacing_->get_object ("right-items");
114 Grob_array *ga = unsmob_grob_array (ri);
117 SCM ga_scm = Grob_array::make_array ();
118 last_spacings_.staff_spacing_->set_object ("right-items", ga_scm);
119 ga = unsmob_grob_array (ga_scm);
123 ga->add (break_item_);
128 if (Accidental_placement::has_interface (it))
129 Separation_item::add_conditional_item (p_ref_, it);
131 Separation_item::add_item (p_ref_, it);
135 Separating_line_group_engraver::start_translation_timestep ()
139 context ()->unset_property (ly_symbol2scm ("breakableSeparationItem"));
145 Separating_line_group_engraver::stop_translation_timestep ()
147 if (Item *sp = current_spacings_.staff_spacing_)
150 TODO: should really look at the left-items of following
154 Pointer_group_interface::add_grob (sp, ly_symbol2scm ("right-items"),
158 if (!current_spacings_.is_empty ())
159 last_spacings_ = current_spacings_;
161 current_spacings_.clear ();
166 ADD_ACKNOWLEDGER (Separating_line_group_engraver, item);
167 ADD_TRANSLATOR (Separating_line_group_engraver,
168 /* doc */ "Generates objects for computing spacing parameters.",
172 "SeparatingGroupSpanner "
174 /* read */ "createSpacing",
175 /* write */ "breakableSeparationItem");