2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 1998--2010 Han-Wen Nienhuys <hanwen@xs4all.nl>
6 LilyPond is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 LilyPond is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
20 #include "engraver.hh"
22 #include "separation-item.hh"
23 #include "paper-column.hh"
24 #include "output-def.hh"
25 #include "axis-group-interface.hh"
26 #include "note-spacing.hh"
27 #include "accidental-placement.hh"
30 #include "grob-array.hh"
31 #include "pointer-group-interface.hh"
33 #include "translator.icc"
38 vector
<Item
*> note_spacings_
;
45 bool is_empty () const
47 return !staff_spacing_
&& !note_spacings_
.size ();
52 note_spacings_
.clear ();
56 class Separating_line_group_engraver
: public Engraver
59 Spacings current_spacings_
;
60 Spacings last_spacings_
;
62 DECLARE_ACKNOWLEDGER (item
);
63 DECLARE_ACKNOWLEDGER (break_aligned
);
64 void stop_translation_timestep ();
65 void start_translation_timestep ();
67 vector
<Grob
*> break_aligned_
;
69 TRANSLATOR_DECLARATIONS (Separating_line_group_engraver
);
72 Separating_line_group_engraver::Separating_line_group_engraver ()
77 Separating_line_group_engraver::acknowledge_item (Grob_info i
)
81 if (Note_spacing::has_interface (it
))
83 current_spacings_
.note_spacings_
.push_back (it
);
87 if (Item::is_non_musical (it
)
88 && !current_spacings_
.staff_spacing_
89 && to_boolean (get_property ("createSpacing")))
91 Grob
*col
= unsmob_grob (get_property ("currentCommandColumn"));
93 current_spacings_
.staff_spacing_
= make_item ("StaffSpacing", SCM_EOL
);
94 context ()->set_property ("hasStaffSpacing", SCM_BOOL_T
);
96 Pointer_group_interface::add_grob (current_spacings_
.staff_spacing_
,
97 ly_symbol2scm ("left-items"),
100 if (!last_spacings_
.note_spacings_
.size ()
101 && last_spacings_
.staff_spacing_
)
103 SCM ri
= last_spacings_
.staff_spacing_
->get_object ("right-items");
104 Grob_array
*ga
= unsmob_grob_array (ri
);
107 SCM ga_scm
= Grob_array::make_array ();
108 last_spacings_
.staff_spacing_
->set_object ("right-items", ga_scm
);
109 ga
= unsmob_grob_array (ga_scm
);
119 Separating_line_group_engraver::acknowledge_break_aligned (Grob_info gi
)
121 break_aligned_
.push_back (gi
.grob ());
125 Separating_line_group_engraver::start_translation_timestep ()
127 context ()->unset_property (ly_symbol2scm ("hasStaffSpacing"));
131 Separating_line_group_engraver::stop_translation_timestep ()
133 for (vsize i
= 0; i
< break_aligned_
.size (); i
++)
135 SCM smob
= break_aligned_
[i
]->self_scm ();
137 if (Item
*sp
= current_spacings_
.staff_spacing_
)
138 Pointer_group_interface::add_grob (sp
, ly_symbol2scm ("left-break-aligned"), smob
);
140 for (vsize j
= 0; j
< last_spacings_
.note_spacings_
.size (); j
++)
141 Pointer_group_interface::add_grob (last_spacings_
.note_spacings_
[j
],
142 ly_symbol2scm ("right-break-aligned"), smob
);
145 if (!current_spacings_
.is_empty ())
146 last_spacings_
= current_spacings_
;
148 if (Item
*sp
= current_spacings_
.staff_spacing_
)
149 if (Grob
*col
= unsmob_grob (get_property ("currentMusicalColumn")))
150 Pointer_group_interface::add_grob (sp
, ly_symbol2scm ("right-items"), col
);
152 current_spacings_
.clear ();
153 break_aligned_
.clear ();
156 ADD_ACKNOWLEDGER (Separating_line_group_engraver
, item
);
157 ADD_ACKNOWLEDGER (Separating_line_group_engraver
, break_aligned
);
159 ADD_TRANSLATOR (Separating_line_group_engraver
,
161 "Generate objects for computing spacing parameters.",