2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2008--2011 Han-Wen Nienhuys <hanwen@lilypond.org>
7 LilyPond is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
12 LilyPond is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
23 #include "engraver.hh"
25 #include "axis-group-interface.hh"
26 #include "directional-element-interface.hh"
28 #include "side-position-interface.hh"
30 #include "stream-event.hh"
32 #include "translator.icc"
34 class Dynamic_align_engraver : public Engraver
36 TRANSLATOR_DECLARATIONS (Dynamic_align_engraver);
37 DECLARE_ACKNOWLEDGER (note_column);
38 DECLARE_ACKNOWLEDGER (dynamic);
39 DECLARE_ACKNOWLEDGER (footnote_spanner);
40 DECLARE_END_ACKNOWLEDGER (dynamic);
43 virtual void stop_translation_timestep ();
46 void create_line_spanner (Stream_event *cause);
47 void set_spanner_bounds (Spanner *line, bool end);
49 Spanner *ended_line_; // Spanner manually broken, don't use it for new grobs
50 Spanner *current_dynamic_spanner_;
51 vector<Spanner *> ended_;
52 vector<Spanner *> started_;
53 vector<Grob *> scripts_;
54 vector<Grob *> support_;
56 set<Spanner *> running_;
59 Dynamic_align_engraver::Dynamic_align_engraver ()
63 current_dynamic_spanner_ = 0;
66 ADD_ACKNOWLEDGER (Dynamic_align_engraver, dynamic);
67 ADD_ACKNOWLEDGER (Dynamic_align_engraver, note_column);
68 ADD_ACKNOWLEDGER (Dynamic_align_engraver, footnote_spanner);
69 ADD_END_ACKNOWLEDGER (Dynamic_align_engraver, dynamic);
72 Dynamic_align_engraver::create_line_spanner (Stream_event *event)
75 line_ = make_spanner ("DynamicLineSpanner",
76 event ? event->self_scm () : SCM_EOL);
80 Dynamic_align_engraver::acknowledge_end_dynamic (Grob_info info)
82 if (Spanner::has_interface (info.grob ()))
83 ended_.push_back (info.spanner ());
85 /* If the break flag is set, store the current spanner and let new dynamics
86 * create a new spanner
88 bool spanner_broken = current_dynamic_spanner_ == info.spanner () &&
89 to_boolean (current_dynamic_spanner_->get_property ("spanner-broken"));
90 if (spanner_broken && line_)
93 programming_error ("already have a force-ended DynamicLineSpanner.");
96 current_dynamic_spanner_ = 0;
101 Dynamic_align_engraver::acknowledge_footnote_spanner (Grob_info info)
103 Grob *parent = info.grob ()->get_parent (Y_AXIS);
105 && parent->internal_has_interface (ly_symbol2scm ("dynamic-interface")))
106 Axis_group_interface::add_element (line_, info.grob ());
110 Dynamic_align_engraver::acknowledge_note_column (Grob_info info)
112 support_.push_back (info.grob ());
116 Dynamic_align_engraver::acknowledge_dynamic (Grob_info info)
118 Stream_event *cause = info.event_cause ();
119 create_line_spanner (cause);
120 if (Spanner::has_interface (info.grob ()))
122 started_.push_back (info.spanner ());
123 current_dynamic_spanner_ = info.spanner ();
125 else if (info.item ())
126 scripts_.push_back (info.item ());
128 info.grob ()->programming_error ("unknown dynamic grob");
130 Axis_group_interface::add_element (line_, info.grob ());
134 // TODO: Compare the direction of the existing spanner with
135 // the new one and if they differ, create a new line
137 if (Direction d = to_dir (cause->get_property ("direction")))
138 set_grob_direction (line_, d);
143 Dynamic_align_engraver::set_spanner_bounds (Spanner *line, bool end)
150 if ((d == LEFT && !line->get_bound (LEFT)) ||
151 (end && d == RIGHT && !line->get_bound (RIGHT)))
153 vector<Spanner *> const &spanners
154 = (d == LEFT) ? started_ : ended_;
157 if (scripts_.size ())
159 else if (spanners.size ())
160 bound = spanners[0]->get_bound (d);
163 bound = unsmob_grob (get_property ("currentMusicalColumn"));
164 programming_error ("started DynamicLineSpanner but have no left bound");
167 line->set_bound (d, bound);
170 while (flip (&d) != LEFT);
174 Dynamic_align_engraver::stop_translation_timestep ()
176 for (vsize i = 0; i < started_.size (); i++)
177 running_.insert (started_[i]);
178 for (vsize i = 0; i < ended_.size (); i++)
180 Spanner *sp = ended_[i];
182 set<Spanner *>::iterator it = running_.find (sp);
183 if (it != running_.end ())
186 started_[i]->programming_error ("lost track of this dynamic spanner");
189 bool end = line_ && running_.empty ();
191 // Set the proper bounds for the current spanner and for a spanner that
193 set_spanner_bounds (ended_line_, true);
194 set_spanner_bounds (line_, end);
195 // If the flag is set to break the spanner after the current child, don't
196 // add any more support points (needed e.g. for style=none, where the
197 // invisible spanner should NOT be shifted since we don't have a line).
198 bool spanner_broken = current_dynamic_spanner_ &&
199 to_boolean (current_dynamic_spanner_->get_property ("spanner-broken"));
200 for (vsize i = 0; line_ && !spanner_broken && i < support_.size (); i++)
201 Side_position_interface::add_support (line_, support_[i]);
215 ADD_TRANSLATOR (Dynamic_align_engraver,
217 "Align hairpins and dynamic texts on a horizontal line.",
220 "DynamicLineSpanner ",
223 "currentMusicalColumn ",