/*
extender-engraver.cc -- implement Extender_engraver
- (c) 1999 Glen Prideaux <glenprideaux@iname.com>,
- Han-Wen Nienhuys, Jan Nieuwenhuizen.
+ 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 "flower-proto.hh"
-#include "musical-request.hh"
+#include "event.hh"
#include "lyric-extender.hh"
#include "paper-column.hh"
#include "item.hh"
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
+ 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
{
- Score_element *last_lyric_l_;
- Score_element *current_lyric_l_;
- Extender_req* req_l_;
- Spanner* extender_p_;
+ Grob *last_lyric_;
+ Grob *current_lyric_;
+ Music* req_;
+ Spanner* extender_;
public:
- Extender_engraver ();
- VIRTUAL_COPY_CONS (Translator);
+ TRANSLATOR_DECLARATIONS(Extender_engraver);
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 ();
+ 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 ()
{
- current_lyric_l_ = 0;
- last_lyric_l_ = 0;
- extender_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)
{
// -> text_item
- if (i.elem_l_->has_interface (ly_symbol2scm("text-item-interface")))
-
+ if (i.grob_->internal_has_interface (ly_symbol2scm ("lyric-syllable-interface")))
{
- current_lyric_l_ = i.elem_l_;
- if (extender_p_
- && !extender_p_->get_bound (RIGHT)
+ current_lyric_ = i.grob_;
+ if (extender_
+ && !extender_->get_bound (RIGHT)
)
{
- Lyric_extender(extender_p_).set_textitem (RIGHT, dynamic_cast<Item*> (i.elem_l_));
+ Lyric_extender::set_textitem (extender_, RIGHT, dynamic_cast<Item*> (i.grob_));
}
}
}
bool
-Extender_engraver::do_try_music (Music* r)
+Extender_engraver::try_music (Music* r)
{
- if (Extender_req* p = dynamic_cast <Extender_req *> (r))
- {
- 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_p_)
+ if (extender_)
{
- req_l_->warning (_ ("unterminated extender"));
- extender_p_->set_bound(RIGHT, unsmob_element (get_property ("currentCommandColumn")));
+ req_->origin ()->warning (_ ("unterminated extender"));
+ extender_->set_bound (RIGHT, unsmob_grob (get_property ("currentCommandColumn")));
}
}
void
-Extender_engraver::do_process_music ()
+Extender_engraver::process_music ()
{
- if (req_l_)
+ if (req_ && ! extender_)
{
- if (!last_lyric_l_)
+ 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_p_ = new Spanner (get_property ("basicLyricExtenderProperties"));
- extender_p_->set_extent_callback (Score_element::point_dimension_callback, Y_AXIS);
+ extender_ = new Spanner (get_property ("LyricExtender"));
+
- Lyric_extender (extender_p_).set_textitem (LEFT, last_lyric_l_);
- announce_element (Score_element_info (extender_p_, req_l_));
+ 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 ()
{
- if (extender_p_)
+ if (extender_)
{
- typeset_element (extender_p_);
- extender_p_ = 0;
+ typeset_grob (extender_);
+ extender_ = 0;
}
- if (current_lyric_l_)
+ if (current_lyric_)
{
- last_lyric_l_ = current_lyric_l_;
- current_lyric_l_ =0;
+ last_lyric_ = current_lyric_;
+ current_lyric_ =0;
}
}
void
-Extender_engraver::do_post_move_processing ()
+Extender_engraver::start_translation_timestep ()
{
- req_l_ = 0;
+ req_ = 0;
}
+ENTER_DESCRIPTION(Extender_engraver,
+/* descr */ "Create lyric extenders",
+/* creats*/ "LyricExtender",
+/* accepts */ "extender-event",
+/* acks */ "lyric-syllable-interface",
+/* reads */ "",
+/* write */ "");