/*
- chord-name-engraver.cc -- implement Chord_name_engraver
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 1998--2015 Jan Nieuwenhuizen <janneke@gnu.org>
- (c) 1998--2009 Jan Nieuwenhuizen <janneke@gnu.org>
+ 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 "chord-name.hh"
void stop_translation_timestep ();
void process_music ();
virtual void finalize ();
- virtual void derived_mark () const;
DECLARE_TRANSLATOR_LISTENER (note);
DECLARE_TRANSLATOR_LISTENER (rest);
private:
- Item *chord_name_;
- vector<Stream_event*> notes_;
-
- SCM last_chord_;
+ vector<Stream_event *> notes_;
+
Stream_event *rest_event_;
};
{
}
-void
-Chord_name_engraver::derived_mark () const
-{
- scm_gc_mark (last_chord_);
-}
-
Chord_name_engraver::Chord_name_engraver ()
{
- chord_name_ = 0;
- last_chord_ = SCM_EOL;
rest_event_ = 0;
}
void
Chord_name_engraver::process_music ()
-{
+{
+ if (!rest_event_ && notes_.empty ())
+ return;
+
SCM markup;
SCM bass = SCM_EOL;
SCM inversion = SCM_EOL;
SCM pitches = SCM_EOL;
+ Item *chord_name = 0;
+ // rest events present a hen-and-egg problem with regard to
+ // overriding the text property of the ChordName grob since we
+ // cannot create a ChordName grob, look at its text property and, if
+ // not set, use noChordSymbol to decide whether we should not have
+ // created the grob in the first place.
if (rest_event_)
{
SCM no_chord_markup = get_property ("noChordSymbol");
if (!Text_interface::is_markup (no_chord_markup))
return;
markup = no_chord_markup;
+ chord_name = make_item ("ChordName", rest_event_->self_scm ());
+ chord_name->set_property ("text", markup);
}
else
- {
- if (!notes_.size ())
- return;
-
- Stream_event *inversion_event = 0;
- for (vsize i = 0; i < notes_.size (); i++)
- {
- Stream_event *n = notes_[i];
- SCM p = n->get_property ("pitch");
- if (!unsmob_pitch (p))
- continue;
-
- if (n->get_property ("inversion") == SCM_BOOL_T)
- {
- inversion_event = n;
- inversion = p;
- }
- else if (n->get_property ("bass") == SCM_BOOL_T)
- bass = p;
- else
- pitches = scm_cons (p, pitches);
- }
-
- if (inversion_event)
- {
- SCM oct = inversion_event->get_property ("octavation");
- if (scm_is_number (oct))
+ {
+ chord_name = make_item ("ChordName", notes_[0]->self_scm ());
+ // We cannot actually delay fetching the text property in case
+ // it is a callback since we need to compare the generated
+ // markups for the sake of chordChanges
+ markup = chord_name->get_property ("text");
+ if (!Text_interface::is_markup (markup))
{
- Pitch *p = unsmob_pitch (inversion_event->get_property ("pitch"));
- int octavation = scm_to_int (oct);
- Pitch orig = p->transposed (Pitch (-octavation, 0, 0));
-
- pitches = scm_cons (orig.smobbed_copy (), pitches);
+ for (vsize i = 0; i < notes_.size (); i++)
+ {
+ Stream_event *n = notes_[i];
+ SCM p = n->get_property ("pitch");
+ if (!Pitch::is_smob (p))
+ continue;
+
+ if (n->get_property ("bass") == SCM_BOOL_T)
+ bass = p;
+ else
+ {
+ SCM oct = n->get_property ("octavation");
+ if (scm_is_number (oct))
+ {
+ Pitch orig = Pitch::unsmob (p)->transposed (Pitch (-scm_to_int (oct), 0));
+ pitches = scm_cons (orig.smobbed_copy (), pitches);
+ }
+ else
+ pitches = scm_cons (p, pitches);
+ if (n->get_property ("inversion") == SCM_BOOL_T)
+ {
+ inversion = p;
+ if (!scm_is_number (oct))
+ programming_error ("inversion does not have original pitch");
+ }
+ }
+ }
+
+ pitches = scm_sort_list (pitches, Pitch::less_p_proc);
+
+ SCM name_proc = get_property ("chordNameFunction");
+ markup = scm_call_4 (name_proc, pitches, bass, inversion,
+ context ()->self_scm ());
+ if (!Text_interface::is_markup (markup))
+ {
+ // Ugh, we created a grob, now we better populate it.
+ // Use an empty string.
+ markup = scm_string (SCM_EOL);
+ }
+ chord_name->set_property ("text", markup);
}
- else
- programming_error ("inversion does not have original pitch");
- }
-
- pitches = scm_sort_list (pitches, Pitch::less_p_proc);
-
- SCM name_proc = get_property ("chordNameFunction");
- markup = scm_call_4 (name_proc, pitches, bass, inversion,
- context ()->self_scm ());
}
- /*
- Ugh.
- */
- SCM chord_as_scm = scm_cons (pitches, scm_cons (bass, inversion));
- chord_name_ = make_item ("ChordName",
- rest_event_ ? rest_event_->self_scm () : notes_[0]->self_scm ());
- chord_name_->set_property ("text", markup);
+ SCM chord_changes = get_property ("chordChanges");
+ SCM last_chord = get_property ("lastChord");
+ if (to_boolean (chord_changes) && ly_is_equal (markup, last_chord))
+ chord_name->set_property ("begin-of-line-visible", SCM_BOOL_T);
- SCM chord_changes = get_property("chordChanges");
- if (to_boolean (chord_changes) && scm_is_pair (last_chord_)
- && ly_is_equal (chord_as_scm, last_chord_))
- chord_name_->set_property ("begin-of-line-visible", SCM_BOOL_T);
-
- last_chord_ = chord_as_scm;
+ context ()->set_property ("lastChord", markup);
}
IMPLEMENT_TRANSLATOR_LISTENER (Chord_name_engraver, note);
void
Chord_name_engraver::listen_rest (Stream_event *ev)
{
- ASSIGN_EVENT_ONCE(rest_event_, ev);
+ ASSIGN_EVENT_ONCE (rest_event_, ev);
}
-
+
void
Chord_name_engraver::stop_translation_timestep ()
{
- chord_name_ = 0;
notes_.clear ();
rest_event_ = 0;
}
which properties are read depend on the chord naming function active.
*/
ADD_TRANSLATOR (Chord_name_engraver,
- /* doc */
- "Catch note and rest events and generate the appropriate chordname.",
-
- /* create */
- "ChordName ",
-
- /* read */
- "chordChanges "
- "chordNameExceptions "
- "chordNameFunction "
- "chordNoteNamer "
- "chordRootNamer "
- "chordNameExceptions "
- "majorSevenSymbol "
+ /* doc */
+ "Catch note and rest events and generate the appropriate chordname.",
+
+ /* create */
+ "ChordName ",
+
+ /* read */
+ "chordChanges "
+ "chordNameExceptions "
+ "chordNameFunction "
+ "chordNoteNamer "
+ "chordRootNamer "
+ "chordNameExceptions "
+ "lastChord "
+ "majorSevenSymbol "
"noChordSymbol ",
- /* write */
- ""
- );
+ /* write */
+ "lastChord "
+ );
projects / lilypond.git / blobdiff