2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2001--2015 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/>.
21 #include "engraver.hh"
25 #include "translator.icc"
36 operator < (Grob_pq_entry const &a, Grob_pq_entry const &b)
38 return a.end_ < b.end_;
41 class Grob_pq_engraver : public Engraver
44 TRANSLATOR_DECLARATIONS (Grob_pq_engraver);
46 virtual void initialize ();
47 DECLARE_ACKNOWLEDGER (grob);
48 void start_translation_timestep ();
49 void stop_translation_timestep ();
50 void process_acknowledged ();
52 vector<Grob_pq_entry> started_now_;
55 Grob_pq_engraver::Grob_pq_engraver ()
60 Grob_pq_engraver::initialize ()
62 context ()->set_property ("busyGrobs", SCM_EOL);
65 LY_DEFINE (ly_grob_pq_less_p, "ly:grob-pq<?",
66 2, 0, 0, (SCM a, SCM b),
67 "Compare two grob priority queue entries."
68 " This is an internal function.")
70 if (Moment::compare (*unsmob<Moment> (scm_car (a)),
71 *unsmob<Moment> (scm_car (b))) < 0)
78 Grob_pq_engraver::acknowledge_grob (Grob_info gi)
80 Stream_event *ev = gi.event_cause ();
83 && !gi.grob ()->internal_has_interface (ly_symbol2scm ("multi-measure-interface")))
85 Moment n = now_mom ();
86 Moment l = get_event_length (ev, n);
97 started_now_.push_back (e);
102 Grob_pq_engraver::process_acknowledged ()
104 vector_sort (started_now_, std::less<Grob_pq_entry> ());
107 for (vsize i = 0; i < started_now_.size (); i++)
109 *tail = scm_acons (started_now_[i].end_.smobbed_copy (),
110 started_now_[i].grob_->self_scm (),
112 tail = SCM_CDRLOC (*tail);
115 SCM busy = get_property ("busyGrobs");
116 busy = scm_merge_x (lst, busy, ly_grob_pq_less_p_proc);
117 context ()->set_property ("busyGrobs", busy);
119 started_now_.clear ();
123 Grob_pq_engraver::stop_translation_timestep ()
125 Moment now = now_mom ();
126 SCM start_busy = get_property ("busyGrobs");
127 SCM busy = start_busy;
128 while (scm_is_pair (busy) && *unsmob<Moment> (scm_caar (busy)) == now)
129 busy = scm_cdr (busy);
134 Grob_pq_engraver::start_translation_timestep ()
136 Moment now = now_mom ();
138 SCM start_busy = get_property ("busyGrobs");
139 SCM busy = start_busy;
140 while (scm_is_pair (busy) && *unsmob<Moment> (scm_caar (busy)) < now)
143 The grob-pq-engraver is not water tight, and stuff like
144 tupletSpannerDuration confuses it.
146 busy = scm_cdr (busy);
149 if (start_busy != busy)
150 context ()->set_property ("busyGrobs", busy);
153 ADD_ACKNOWLEDGER (Grob_pq_engraver, grob);
154 ADD_TRANSLATOR (Grob_pq_engraver,
156 "Administrate when certain grobs (e.g., note heads) stop"