/*
extender-engraver.cc -- implement Extender_engraver
- (c) 1998--1999 Jan Nieuwenhuizen <janneke@gnu.org>
+ (c) 1999 Glen Prideaux <glenprideaux@iname.com>,
+ Han-Wen Nienhuys, Jan Nieuwenhuizen.
+
*/
-#include "proto.hh"
+#include "flower-proto.hh"
#include "musical-request.hh"
-#include "extender-engraver.hh"
-#include "extender-spanner.hh"
-#include "score-column.hh"
-#include "text-item.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
+ request, 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
+{
+ Score_element *last_lyric_l_;
+ Score_element *current_lyric_l_;
+ Extender_req* req_l_;
+ Spanner* extender_p_;
+public:
+ Extender_engraver ();
+ VIRTUAL_COPY_CONS (Translator);
+
+protected:
+ virtual void acknowledge_element (Score_element_info);
+ virtual void do_removal_processing();
+ virtual void do_process_music();
+ virtual bool do_try_music (Music*);
+ virtual void do_pre_move_processing();
+ virtual void do_post_move_processing ();
+private:
+
+};
+
ADD_THIS_TRANSLATOR (Extender_engraver);
Extender_engraver::Extender_engraver ()
{
- extender_spanner_p_ = 0;
+ current_lyric_l_ = 0;
+ last_lyric_l_ = 0;
+ extender_p_ = 0;
req_l_ = 0;
}
void
Extender_engraver::acknowledge_element (Score_element_info i)
{
- if (Text_item* t = dynamic_cast<Text_item*> (i.elem_l_))
+ // -> text_item
+ if (i.elem_l_->has_interface (ly_symbol2scm("text-item-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_l_ = i.elem_l_;
+ if (extender_p_
+ && !extender_p_->get_bound (RIGHT)
)
{
- extender_spanner_p_->set_textitem (RIGHT, t);
+ Lyric_extender(extender_p_).set_textitem (RIGHT, dynamic_cast<Item*> (i.elem_l_));
}
}
}
bool
-Extender_engraver::do_try_music (Music* req_l)
+Extender_engraver::do_try_music (Music* r)
{
- if (Extender_req* p = dynamic_cast <Extender_req *> (req_l))
+ if (Extender_req* p = dynamic_cast <Extender_req *> (r))
{
if (req_l_)
return false;
void
Extender_engraver::do_removal_processing ()
{
- if (extender_spanner_p_)
+ if (extender_p_)
{
- req_l_->warning (_ ("unterminated extender"));
- extender_spanner_p_->set_bounds(RIGHT, get_staff_info ().command_pcol_l ());
+ req_l_->origin ()->warning (_ ("unterminated extender"));
+ extender_p_->set_bound(RIGHT, unsmob_element (get_property ("currentCommandColumn")));
}
}
void
-Extender_engraver::do_process_requests ()
+Extender_engraver::do_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 (!stopped_texts.size ())
+ if (!last_lyric_l_)
{
- req_l_->warning ("Nothing to connect extender to on the left. Ignoring extender request");
+ req_l_->origin ()->warning (_ ("Nothing to connect extender to on the left. Ignoring extender request."));
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_p_ = new Spanner (get_property ("LyricExtender"));
+
+
+ Lyric_extender (extender_p_).set_textitem (LEFT, last_lyric_l_);
+ announce_element (extender_p_, req_l_);
}
}
void
Extender_engraver::do_pre_move_processing ()
{
- for (int i=0; i < now_lyrics_.size (); i++)
+ if (extender_p_)
{
- past_lyrics_pq_.insert (now_lyrics_[i]);
+ typeset_element (extender_p_);
+ extender_p_ = 0;
}
- now_lyrics_.clear ();
- if (extender_spanner_p_)
+ if (current_lyric_l_)
{
- typeset_element (extender_spanner_p_);
- extender_spanner_p_ = 0;
+ last_lyric_l_ = current_lyric_l_;
+ current_lyric_l_ =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 (Text_item *h, Rhythmic_req*m, Moment mom)
-{
- text_l_ = h;
- req_l_ = m;
- end_ = mom;
+ req_l_ = 0;
}
-int
-Text_lyric_tuple::time_compare (Text_lyric_tuple const&h1,
- Text_lyric_tuple const &h2)
-{
- return (h1.end_ - h2.end_ ).sign ();
-}