-
/*
lyric-number-engraver.cc -- implement Stanza_number_engraver
source file of the GNU LilyPond music typesetter
- (c) 2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>, Glen Prideaux <glenprideaux@iname.com>
-
- Similar to (and derived from) Instrument_name_engraver.
- */
+ (c) 2000--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>, Glen Prideaux <glenprideaux@iname.com>
+
+*/
#include "engraver.hh"
#include "item.hh"
-//#include "system-start-delimiter.hh"
-//#include "side-position-interface.hh"
-//#include "staff-symbol-referencer.hh"
-#include "bar.hh"
+#include "side-position-interface.hh"
class Stanza_number_engraver : public Engraver
{
Item *text_;
- bool bar_b_;;
- void create_text (SCM s);
+ /*
+ This is naughty, since last_stanza_ may be GCd from under us. But
+ since we don't look at the contents, we are/should be (knock on
+ wood) OK.
+ */
+ SCM last_stanza_;
public:
- VIRTUAL_COPY_CONS(Translator);
- Stanza_number_engraver ();
-
- virtual void acknowledge_element (Score_element_info);
- virtual void do_pre_move_processing ();
+ TRANSLATOR_DECLARATIONS(Stanza_number_engraver);
+ virtual void process_music ();
+ virtual void stop_translation_timestep ();
+ virtual void acknowledge_grob (Grob_info);
};
-ADD_THIS_TRANSLATOR(Stanza_number_engraver);
+
+/*
+ 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;
}
void
-Stanza_number_engraver::acknowledge_element(Score_element_info i)
+Stanza_number_engraver::process_music ()
{
- SCM s = get_property ("stanza");
-
- if (now_mom () > Moment (0))
- s = get_property ("stz");
+ SCM stanza = get_property ("stanza");
- if (gh_string_p (s))
+ if (gh_string_p (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 LyricVoice 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");
+ text_->set_grob_property ("text", stanza);
+ announce_grob (text_, SCM_EOL);
}
}
void
-Stanza_number_engraver::do_pre_move_processing ()
+Stanza_number_engraver::acknowledge_grob (Grob_info inf)
{
- if (text_)
+ if (text_
+ && inf.grob_->internal_has_interface (ly_symbol2scm ("lyric-syllable-interface")))
{
- typeset_element (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_)
+ if (text_)
{
- text_ = new Item (get_property ("basicStanzaNumberProperties"));
- text_->set_elt_property ("text", txt);
- announce_element (text_,0);
+ typeset_grob (text_);
+ text_ = 0;
}
}
-
-
+ENTER_DESCRIPTION(Stanza_number_engraver,
+/* descr */ "",
+/* creats*/ "StanzaNumber",
+/* accepts */ "",
+/* acks */ "lyric-syllable-interface",
+/* reads */ "stanza",
+/* write */ "");