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1 /*
2   This file is part of LilyPond, the GNU music typesetter.
3
4   Copyright (C) 2005--2010 Han-Wen Nienhuys <hanwen@xs4all.nl>
5
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.
10
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.
15
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/>.
18 */
19
20 #include "engraver.hh"
21 #include "grob.hh"
22 #include "axis-group-interface.hh"
23 #include "context.hh"
24 #include "pointer-group-interface.hh"
25
26 class Vertically_spaced_contexts_engraver : public Engraver
27 {
28   TRANSLATOR_DECLARATIONS (Vertically_spaced_contexts_engraver);
29 protected:
30   virtual void initialize ();
31   DECLARE_ACKNOWLEDGER (vertically_spaceable);
32
33 private:
34   Grob *system_;
35 };
36
37 Vertically_spaced_contexts_engraver::Vertically_spaced_contexts_engraver ()
38 {
39   system_ = 0;
40 }
41
42 void
43 Vertically_spaced_contexts_engraver::initialize ()
44 {
45   system_ = unsmob_grob (get_property ("rootSystem"));
46 }
47
48 void
49 Vertically_spaced_contexts_engraver::acknowledge_vertically_spaceable (Grob_info gi)
50 {
51   if (Axis_group_interface::has_interface (gi.grob ()))
52     {
53       SCM spaceable = get_property ("verticallySpacedContexts");
54       Context *orig = gi.origin_contexts (this)[0];
55
56       if (scm_memq (ly_symbol2scm (orig->context_name ().c_str ()),
57                     spaceable) != SCM_BOOL_F)
58         {
59           Pointer_group_interface::add_unordered_grob (system_,
60                                                        ly_symbol2scm ("spaceable-staves"),
61                                                        gi.grob ());
62         }
63     }
64 }
65
66 #include "translator.icc"
67
68 ADD_ACKNOWLEDGER (Vertically_spaced_contexts_engraver, vertically_spaceable);
69 ADD_TRANSLATOR (Vertically_spaced_contexts_engraver,
70                 /* doc */
71                 "",
72
73                 /* create */
74                 "",
75
76                 /* read */
77                 "verticallySpacedContexts ",
78
79                 /* write */
80                 "verticallySpacedContexts "
81                 );