Issue 5167/6: Changes: show \markup xxx = ... \etc assignments

[lilypond.git] / lily / grob-pq-engraver.cc

diff --git a/lily/grob-pq-engraver.cc b/lily/grob-pq-engraver.cc
index 80d072b404fff458548a8ccb1b9b435f5bffbe7b..a9fa75eda51d9708252519adc7f7e34b89ad9927 100644 (file)
--- a/lily/grob-pq-engraver.cc
+++ b/lily/grob-pq-engraver.cc
@@ -1,9 +1,20 @@
 /*
-  grob-pq-engraver.cc -- implement Grob_pq_engraver
+  This file is part of LilyPond, the GNU music typesetter.
 
-  source file of the GNU LilyPond music typesetter
+  Copyright (C) 2001--2015  Han-Wen Nienhuys <hanwen@xs4all.nl>
 
-  (c) 2001--2006  Han-Wen Nienhuys <hanwen@xs4all.nl>
+  LilyPond is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  LilyPond is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 #include "context.hh"
@@ -11,6 +22,8 @@
 #include "grob.hh"
 #include "warn.hh"
 
+#include "translator.icc"
+
 struct Grob_pq_entry
 {
   Grob *grob_;
@@ -18,7 +31,7 @@ struct Grob_pq_entry
 };
 
 bool
-operator< (Grob_pq_entry const &a, Grob_pq_entry const &b)
+operator < (Grob_pq_entry const &a, Grob_pq_entry const &b)
 {
   return a.end_ < b.end_;
 }
@@ -29,14 +42,16 @@ public:
   TRANSLATOR_DECLARATIONS (Grob_pq_engraver);
 protected:
   virtual void initialize ();
-  DECLARE_ACKNOWLEDGER (grob);
+  void acknowledge_grob (Grob_info);
   void start_translation_timestep ();
   void stop_translation_timestep ();
+  void process_acknowledged ();
 
   vector<Grob_pq_entry> started_now_;
 };
 
-Grob_pq_engraver::Grob_pq_engraver ()
+Grob_pq_engraver::Grob_pq_engraver (Context *c)
+  : Engraver (c)
 {
 }
 
@@ -46,12 +61,13 @@ Grob_pq_engraver::initialize ()
   context ()->set_property ("busyGrobs", SCM_EOL);
 }
 
-LY_DEFINE (ly_grob_pq_less_p, "ly:grob-pq-less?",
-          2, 0, 0, (SCM a, SCM b),
-          "Compare 2 grob priority queue entries. Internal")
+LY_DEFINE (ly_grob_pq_less_p, "ly:grob-pq<?",
+           2, 0, 0, (SCM a, SCM b),
+           "Compare two grob priority queue entries."
+           "  This is an internal function.")
 {
-  if (Moment::compare (*unsmob_moment (scm_car (a)),
-                      *unsmob_moment (scm_car (b))) < 0)
+  if (Moment::compare (*unsmob<Moment> (scm_car (a)),
+                       *unsmob<Moment> (scm_car (b))) < 0)
     return SCM_BOOL_T;
   else
     return SCM_BOOL_F;
@@ -60,22 +76,16 @@ LY_DEFINE (ly_grob_pq_less_p, "ly:grob-pq-less?",
 void
 Grob_pq_engraver::acknowledge_grob (Grob_info gi)
 {
-  Music *m = gi.music_cause ();
+  Stream_event *ev = gi.event_cause ();
 
-  if (m
+  if (ev
       && !gi.grob ()->internal_has_interface (ly_symbol2scm ("multi-measure-interface")))
     {
       Moment n = now_mom ();
-      Moment l = m->get_length ();
+      Moment l = get_event_length (ev, n);
 
       if (!l.to_bool ())
-       return;
-
-      if (n.grace_part_)
-       {
-         l.grace_part_ = l.main_part_;
-         l.main_part_ = 0;
-       }
+        return;
 
       Moment end = n + l;
 
@@ -88,31 +98,37 @@ Grob_pq_engraver::acknowledge_grob (Grob_info gi)
 }
 
 void
-Grob_pq_engraver::stop_translation_timestep ()
+Grob_pq_engraver::process_acknowledged ()
 {
-  Moment now = now_mom ();
-  SCM start_busy = get_property ("busyGrobs");
-  SCM busy = start_busy;
-  while (scm_is_pair (busy) && *unsmob_moment (scm_caar (busy)) == now)
-    busy = scm_cdr (busy);
-
   vector_sort (started_now_, less<Grob_pq_entry> ());
   SCM lst = SCM_EOL;
   SCM *tail = &lst;
   for (vsize i = 0; i < started_now_.size (); i++)
     {
       *tail = scm_acons (started_now_[i].end_.smobbed_copy (),
-                        started_now_[i].grob_->self_scm (),
-                        SCM_EOL);
+                         started_now_[i].grob_->self_scm (),
+                         SCM_EOL);
       tail = SCM_CDRLOC (*tail);
     }
 
+  SCM busy = get_property ("busyGrobs");
   busy = scm_merge_x (lst, busy, ly_grob_pq_less_p_proc);
   context ()->set_property ("busyGrobs", busy);
 
   started_now_.clear ();
 }
 
+void
+Grob_pq_engraver::stop_translation_timestep ()
+{
+  Moment now = now_mom ();
+  SCM start_busy = get_property ("busyGrobs");
+  SCM busy = start_busy;
+  while (scm_is_pair (busy) && *unsmob<Moment> (scm_caar (busy)) == now)
+    busy = scm_cdr (busy);
+
+}
+
 void
 Grob_pq_engraver::start_translation_timestep ()
 {
@@ -120,25 +136,36 @@ Grob_pq_engraver::start_translation_timestep ()
 
   SCM start_busy = get_property ("busyGrobs");
   SCM busy = start_busy;
-  while (scm_is_pair (busy) && *unsmob_moment (scm_caar (busy)) < now)
+  while (scm_is_pair (busy) && *unsmob<Moment> (scm_caar (busy)) < now)
     {
       /*
-       The grob-pq-engraver is not water tight, and stuff like
-       tupletSpannerDuration confuses it.
+        The grob-pq-engraver is not water tight, and stuff like
+        tupletSpannerDuration confuses it.
       */
       busy = scm_cdr (busy);
     }
 
-  if (start_busy != busy)
+  if (!scm_is_eq (start_busy, busy))
     context ()->set_property ("busyGrobs", busy);
 }
 
-#include "translator.icc"
-ADD_ACKNOWLEDGER (Grob_pq_engraver, grob);
+void
+Grob_pq_engraver::boot ()
+{
+  ADD_ACKNOWLEDGER (Grob_pq_engraver, grob);
+}
+
 ADD_TRANSLATOR (Grob_pq_engraver,
+                /* doc */
+                "Administrate when certain grobs (e.g., note heads) stop"
+                " playing.",
+
+                /* create */
+                "",
+
+                /* read */
+                "busyGrobs ",
 
-               /* doc */ "Administrate when certain grobs (eg. note heads) stop playing",
-               /* create */ "",
-               /* accept */ "",
-               /* read */ "busyGrobs",
-               /* write */ "busyGrobs");
+                /* write */
+                "busyGrobs "
+               );