/*
extender-engraver.cc -- implement Extender_engraver
- (c) 1998--1999 Jan Nieuwenhuizen <janneke@gnu.org>
+ source file of the GNU LilyPond music typesetter
+
+ (c) 1999--2003 Glen Prideaux <glenprideaux@iname.com>,
+ Han-Wen Nienhuys <hanwen@cs.uu.nl>,
+ Jan Nieuwenhuizen <janneke@gnu.org>
*/
-#include "proto.hh"
-#include "musical-request.hh"
-#include "extender-engraver.hh"
-#include "extender-spanner.hh"
-#include "score-column.hh"
-#include "g-text-item.hh"
+#include "flower-proto.hh"
+#include "event.hh"
+#include "lyric-extender.hh"
+#include "paper-column.hh"
+#include "item.hh"
+#include "engraver.hh"
+#include "drul-array.hh"
+#include "lyric-extender.hh"
+#include "pqueue.hh"
+
+
+/**
+ Generate an centred extender. Should make a Extender_spanner that
+ typesets a nice centred extender of varying length depending on the
+ gap between syllables.
+
+ 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_;
+public:
+ TRANSLATOR_DECLARATIONS(Extender_engraver);
+
+protected:
+ virtual void acknowledge_grob (Grob_info);
+ virtual void finalize ();
+ virtual bool try_music (Music*);
+ virtual void stop_translation_timestep ();
+ virtual void start_translation_timestep ();
+ virtual void process_music ();
+private:
+
+};
+
+
-ADD_THIS_TRANSLATOR (Extender_engraver);
Extender_engraver::Extender_engraver ()
{
- extender_spanner_p_ = 0;
- req_l_ = 0;
+ current_lyric_ = 0;
+ last_lyric_ = 0;
+ extender_ = 0;
+ req_ = 0;
}
void
-Extender_engraver::acknowledge_element (Score_element_info i)
+Extender_engraver::acknowledge_grob (Grob_info i)
{
- if (G_text_item* t = dynamic_cast<G_text_item*> (i.elem_l_))
+ // -> text_item
+ if (i.grob_->internal_has_interface (ly_symbol2scm ("lyric-syllable-interface")))
{
- Rhythmic_req * rh = dynamic_cast<Rhythmic_req*> (i.req_l_);
- if (!rh)
- return;
-
- now_lyrics_.push (Text_lyric_tuple (t, rh, now_mom () + rh->length_mom ()));
- /*
- UGH. What do we do in case of multiple alternatives?
- */
- if (extender_spanner_p_
- && !extender_spanner_p_->spanned_drul_[RIGHT]
+ current_lyric_ = i.grob_;
+ if (extender_
+ && !extender_->get_bound (RIGHT)
)
{
- extender_spanner_p_->set_textitem (RIGHT, t);
+ Lyric_extender::set_textitem (extender_, RIGHT, dynamic_cast<Item*> (i.grob_));
}
}
}
bool
-Extender_engraver::do_try_music (Music* req_l)
+Extender_engraver::try_music (Music* r)
{
- if (Extender_req* p = dynamic_cast <Extender_req *> (req_l))
- {
- if (req_l_)
- return false;
+ if (req_)
+ return false;
- req_l_ = p;
- return true;
- }
- return false;
+ req_ = r;
+ return true;
}
void
-Extender_engraver::do_removal_processing ()
+Extender_engraver::finalize ()
{
- if (extender_spanner_p_)
+ if (extender_)
{
- req_l_->warning (_ ("unterminated extender"));
- extender_spanner_p_->set_bounds(RIGHT, get_staff_info ().command_pcol_l ());
+ req_->origin ()->warning (_ ("unterminated extender"));
+ extender_->set_bound (RIGHT, unsmob_grob (get_property ("currentCommandColumn")));
}
}
void
-Extender_engraver::do_process_requests ()
+Extender_engraver::process_music ()
{
- Array<Text_lyric_tuple> stopped_texts;
- Moment now = now_mom ();
-
- stopped_texts.clear ();
- while (past_lyrics_pq_.size ()
- && past_lyrics_pq_.front ().end_ == now)
- stopped_texts.push (past_lyrics_pq_.get ());
-
- if (req_l_)
+ if (req_ && ! extender_)
{
- if (!stopped_texts.size ())
+ if (!last_lyric_)
{
- req_l_->warning ("Nothing to connect extender to on the left. Ignoring extender request");
+ req_->origin ()->warning (_ ("Nothing to connect extender to on the left. Ignoring extender event."));
return;
}
- extender_spanner_p_ = new Extender_spanner;
- extender_spanner_p_->set_textitem (LEFT, stopped_texts[0].text_l_);
- announce_element (Score_element_info (extender_spanner_p_, req_l_));
+ extender_ = new Spanner (get_property ("LyricExtender"));
+
+
+ Lyric_extender::set_textitem (extender_, LEFT, last_lyric_);
+ announce_grob(extender_, req_->self_scm());
}
}
void
-Extender_engraver::do_pre_move_processing ()
+Extender_engraver::stop_translation_timestep ()
{
- for (int i=0; i < now_lyrics_.size (); i++)
+ if (extender_)
{
- past_lyrics_pq_.insert (now_lyrics_[i]);
+ typeset_grob (extender_);
+ extender_ = 0;
}
- now_lyrics_.clear ();
- if (extender_spanner_p_)
+ if (current_lyric_)
{
- typeset_element (extender_spanner_p_);
- extender_spanner_p_ = 0;
+ last_lyric_ = current_lyric_;
+ current_lyric_ =0;
}
}
-void
-Extender_engraver::do_post_move_processing ()
-{
- Moment now = now_mom ();
- while (past_lyrics_pq_.size () && past_lyrics_pq_.front ().end_ < now)
- past_lyrics_pq_.delmin ();
-
- req_l_ =0;
-}
-
-/**********************************************************************/
-Text_lyric_tuple::Text_lyric_tuple ()
-{
- text_l_ =0;
- req_l_ =0;
- end_ = 0;
-}
-Text_lyric_tuple::Text_lyric_tuple (G_text_item *h, Rhythmic_req*m, Moment mom)
+void
+Extender_engraver::start_translation_timestep ()
{
- text_l_ = h;
- req_l_ = m;
- end_ = mom;
+ req_ = 0;
}
-int
-Text_lyric_tuple::time_compare (Text_lyric_tuple const&h1,
- Text_lyric_tuple const &h2)
-{
- return (h1.end_ - h2.end_ ).sign ();
-}
+ENTER_DESCRIPTION(Extender_engraver,
+/* descr */ "Create lyric extenders",
+/* creats*/ "LyricExtender",
+/* accepts */ "extender-event",
+/* acks */ "lyric-syllable-interface",
+/* reads */ "",
+/* write */ "");
projects / lilypond.git / blobdiff