+/*
+ lyric-number-engraver.cc -- implement Stanza_number_engraver
-/*
- lyric-number-engraver.cc -- implement Stanza_number_engraver
-
source file of the GNU LilyPond music typesetter
-
- (c) 2000--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>, Glen Prideaux <glenprideaux@iname.com>
-
- Similar to (and derived from) Instrument_name_engraver.
- */
+
+ (c) 2000--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>, Glen Prideaux <glenprideaux@iname.com>
+*/
#include "engraver.hh"
+#include "side-position-interface.hh"
+#include "text-interface.hh"
#include "item.hh"
-//#include "system-start-delimiter.hh"
-//#include "side-position-interface.hh"
-//#include "staff-symbol-referencer.hh"
-#include "bar.hh"
class Stanza_number_engraver : public Engraver
{
Item *text_;
- bool bar_b_;;
- void create_text (SCM s);
+ SCM last_stanza_;
public:
- VIRTUAL_COPY_CONS(Translator);
- Stanza_number_engraver ();
-
- virtual void acknowledge_grob (Grob_info);
- virtual void stop_translation_timestep ();
+ TRANSLATOR_DECLARATIONS (Stanza_number_engraver);
+ void process_music ();
+ virtual void derived_mark () const;
+ void stop_translation_timestep ();
+ DECLARE_ACKNOWLEDGER (lyric_syllable);
};
-ADD_THIS_TRANSLATOR(Stanza_number_engraver);
+void
+Stanza_number_engraver::derived_mark () const
+{
+ scm_gc_mark (last_stanza_);
+}
+
+/*
+ TODO: should make engraver that collects all the stanzas on a higher
+ level, and then groups them to the side. Stanza numbers should be
+ all aligned.
+*/
Stanza_number_engraver::Stanza_number_engraver ()
{
text_ = 0;
- bar_b_ = false;
+ last_stanza_ = SCM_EOL;
}
void
-Stanza_number_engraver::acknowledge_grob(Grob_info i)
+Stanza_number_engraver::process_music ()
{
- SCM s = get_property ("stanza");
-
- if (now_mom () > Moment (0))
- s = get_property ("stz");
-
- if (gh_string_p (s))
+ SCM stanza = get_property ("stanza");
+
+ if (Text_interface::is_markup (stanza)
+ && stanza != last_stanza_)
{
-// if (i.elem_l_->has_interface (symbol ("lyric-syllable-interface")))
- // Tried catching lyric items to generate stanza numbers, but it spoils lyric spacing.
- if (Bar::has_interface (i.elem_l_) || now_mom() == Moment(0))
- // Works, but requires bar_engraver in LyricsVoice context apart from at beginning.
- // Is there any score element we can catch that will do the trick?
-// if (! i.elem_l_->has_interface (symbol ("lyric-syllable-interface")) ||
-// now_mom() == Moment(0))
- // What happens if we try anything at all EXCEPT a lyric? Is there anything else?
- // Not sure what it's catching, but it still mucks up lyrics.
- create_text (s);
+ last_stanza_ = stanza;
+
+ text_ = make_item ("StanzaNumber", SCM_EOL);
+ text_->set_property ("text", stanza);
}
}
-
void
-Stanza_number_engraver::stop_translation_timestep ()
+Stanza_number_engraver::acknowledge_lyric_syllable (Grob_info inf)
{
if (text_)
- {
- typeset_grob (text_);
- text_ = 0;
- }
+ Side_position_interface::add_support (text_, inf.grob ());
}
void
-Stanza_number_engraver::create_text (SCM txt)
+Stanza_number_engraver::stop_translation_timestep ()
{
- if(!text_)
- {
- text_ = new Item (get_property ("StanzaNumber"));
- text_->set_grob_property ("text", txt);
- announce_grob (text_,0);
- }
+ text_ = 0;
}
+#include "translator.icc"
+
+ADD_ACKNOWLEDGER (Stanza_number_engraver, lyric_syllable);
+ADD_TRANSLATOR (Stanza_number_engraver,
+ /* doc */
+ "Engrave stanza numbers.",
+ /* create */
+ "StanzaNumber ",
+ /* read */
+ "stanza ",
+ /* write */
+ ""
+ );