extender-engraver.cc -- implement Extender_engraver
source file of the GNU LilyPond music typesetter
-
- (c) 1999-2002 Glen Prideaux <glenprideaux@iname.com>,
- Han-Wen Nienhuys, Jan Nieuwenhuizen.
-
+
+ (c) 1999--2008 Glen Prideaux <glenprideaux@iname.com>,
+ Han-Wen Nienhuys <hanwen@xs4all.nl>,
+ Jan Nieuwenhuizen <janneke@gnu.org>
*/
-#include "flower-proto.hh"
-#include "event.hh"
-#include "lyric-extender.hh"
-#include "paper-column.hh"
-#include "item.hh"
+#include "context.hh"
#include "engraver.hh"
-#include "drul-array.hh"
+#include "international.hh"
+#include "item.hh"
#include "lyric-extender.hh"
-#include "pqueue.hh"
+#include "note-head.hh"
+#include "pointer-group-interface.hh"
+#include "stream-event.hh"
+#include "warn.hh"
+#include "spanner.hh"
+#include "translator.icc"
-/**
- Generate an centred extender. Should make a Extender_spanner that
- typesets a nice centred extender of varying length depending on the
- gap between syllables.
+void completize_extender (Spanner *sp);
- We remember the last Item that come across. When we get a
- event, we create the spanner, and attach the left point to the
- last lyrics, and the right point to any lyrics we receive by
- then. */
class Extender_engraver : public Engraver
{
- Grob *last_lyric_;
- Grob *current_lyric_;
- Music* req_;
- Spanner* extender_;
+ Stream_event *ev_;
+ Spanner *extender_;
+ Spanner *pending_extender_;
+
public:
- TRANSLATOR_DECLARATIONS(Extender_engraver);
+ TRANSLATOR_DECLARATIONS (Extender_engraver);
protected:
- virtual void acknowledge_grob (Grob_info);
+ DECLARE_TRANSLATOR_LISTENER (extender);
+ DECLARE_ACKNOWLEDGER (lyric_syllable);
+
virtual void finalize ();
- virtual bool try_music (Music*);
- virtual void stop_translation_timestep ();
- virtual void start_translation_timestep ();
- virtual void process_music ();
-private:
+ void stop_translation_timestep ();
+ void process_music ();
};
-
-
-
Extender_engraver::Extender_engraver ()
{
- current_lyric_ = 0;
- last_lyric_ = 0;
extender_ = 0;
- req_ = 0;
+ pending_extender_ = 0;
+ ev_ = 0;
}
+IMPLEMENT_TRANSLATOR_LISTENER (Extender_engraver, extender);
void
-Extender_engraver::acknowledge_grob (Grob_info i)
+Extender_engraver::listen_extender (Stream_event *ev)
{
- // -> text_item
- if (i.grob_->internal_has_interface (ly_symbol2scm ("lyric-syllable-interface")))
- {
- current_lyric_ = i.grob_;
- if (extender_
- && !extender_->get_bound (RIGHT)
- )
- {
- Lyric_extender::set_textitem (extender_, RIGHT, dynamic_cast<Item*> (i.grob_));
- }
- }
+ ASSIGN_EVENT_ONCE (ev_, ev);
}
-
-bool
-Extender_engraver::try_music (Music* r)
+void
+Extender_engraver::process_music ()
{
- if (req_)
- return false;
-
- req_ = r;
- return true;
+ if (ev_)
+ extender_ = make_spanner ("LyricExtender", ev_->self_scm ());
}
void
-Extender_engraver::finalize ()
+Extender_engraver::acknowledge_lyric_syllable (Grob_info i)
{
+ Item *item = i.item ();
if (extender_)
+ extender_->set_bound (LEFT, item);
+
+ if (pending_extender_)
{
- req_->origin ()->warning (_ ("unterminated extender"));
- extender_->set_bound (RIGHT, unsmob_grob (get_property ("currentCommandColumn")));
+ pending_extender_->set_object ("next", item->self_scm ());
+ completize_extender (pending_extender_);
+ pending_extender_ = 0;
}
}
void
-Extender_engraver::process_music ()
+Extender_engraver::stop_translation_timestep ()
{
- if (req_ && ! extender_)
+ if (extender_ || pending_extender_)
{
- if (!last_lyric_)
+ Context *voice = get_voice_to_lyrics (context ());
+ Grob *h = voice ? get_current_note_head (voice) : 0;
+
+ if (h)
+ {
+ if (extender_)
+ {
+ Pointer_group_interface::add_grob (extender_,
+ ly_symbol2scm ("heads"), h);
+ }
+
+ if (pending_extender_)
+ {
+ Pointer_group_interface::add_grob (pending_extender_,
+ ly_symbol2scm ("heads"), h);
+ }
+ }
+ else
+ {
+ if (pending_extender_
+ && !get_property ("extendersOverRests"))
+ {
+ completize_extender (pending_extender_);
+ pending_extender_ = 0;
+ }
+
+ }
+ if (extender_)
{
- req_->origin ()->warning (_ ("Nothing to connect extender to on the left. Ignoring extender event."));
- return;
+ pending_extender_ = extender_;
+ extender_ = 0;
}
-
- extender_ = new Spanner (get_property ("LyricExtender"));
+ }
+ ev_ = 0;
+}
- Lyric_extender::set_textitem (extender_, LEFT, last_lyric_);
- announce_grob(extender_, req_->self_scm());
+void
+completize_extender (Spanner *sp)
+{
+ if (!sp->get_bound (RIGHT))
+ {
+ extract_item_set (sp, "heads", heads);
+ if (heads.size ())
+ sp->set_bound (RIGHT, heads.back ());
}
}
-
void
-Extender_engraver::stop_translation_timestep ()
+Extender_engraver::finalize ()
{
if (extender_)
{
- typeset_grob (extender_);
+ completize_extender (extender_);
+
+ if (!extender_->get_bound (RIGHT))
+ extender_->warning (_ ("unterminated extender"));
extender_ = 0;
}
- if (current_lyric_)
+ if (pending_extender_)
{
- last_lyric_ = current_lyric_;
- current_lyric_ =0;
+ completize_extender (pending_extender_);
+
+ if (!pending_extender_->get_bound (RIGHT))
+ pending_extender_->warning (_ ("unterminated extender"));
+ pending_extender_ = 0;
}
}
-void
-Extender_engraver::start_translation_timestep ()
-{
- req_ = 0;
-}
+ADD_ACKNOWLEDGER (Extender_engraver, lyric_syllable);
+ADD_TRANSLATOR (Extender_engraver,
+ /* doc */
+ "Create lyric extenders.",
+
+ /* create */
+ "LyricExtender ",
+ /* read */
+ "extendersOverRests ",
-ENTER_DESCRIPTION(Extender_engraver,
-/* descr */ "Create lyric extenders",
-/* creats*/ "LyricExtender",
-/* accepts */ "extender-event",
-/* acks */ "lyric-syllable-interface",
-/* reads */ "",
-/* write */ "");
+ /* write */
+ ""
+ );
projects / lilypond.git / blobdiff