/*
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--2004 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 "warn.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_;
+ Music* ev_;
+ Spanner* extender_;
+ Spanner * finished_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 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;
+ extender_ = 0;
+ finished_extender_ = 0;
+ ev_ = 0;
}
void
-Extender_engraver::acknowledge_element (Score_element_info i)
+Extender_engraver::acknowledge_grob (Grob_info i)
{
+ Item * item = dynamic_cast<Item*> (i.grob_);
// -> text_item
- if (i.elem_l_->has_interface (ly_symbol2scm("text-item-interface")))
-
+ if (item && item->internal_has_interface (ly_symbol2scm ("lyric-syllable-interface")))
{
- current_lyric_l_ = i.elem_l_;
- if (extender_p_
- && !extender_p_->get_bound (RIGHT)
- )
- {
- Lyric_extender(extender_p_).set_textitem (RIGHT, dynamic_cast<Item*> (i.elem_l_));
- }
+ if (extender_)
+ extender_->set_bound (LEFT, item);
+
+ if (finished_extender_)
+ finished_extender_->set_bound (RIGHT, item);
}
}
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 (ev_)
+ return false;
- req_l_ = p;
- return true;
- }
- return false;
+ ev_ = r;
+ return true;
}
void
-Extender_engraver::do_removal_processing ()
+completize_extender (Spanner* sp)
{
- if (extender_p_)
+ if (!sp->get_bound (RIGHT))
{
- req_l_->origin ()->warning (_ ("unterminated extender"));
- extender_p_->set_bound(RIGHT, unsmob_element (get_property ("currentCommandColumn")));
+ SCM heads = sp->get_grob_property ("heads");
+ if (gh_pair_p (heads))
+ {
+ Item* it = dynamic_cast<Item*> (unsmob_grob (gh_car (heads)));
+ if (it)
+ sp->set_bound (RIGHT, it);
+ }
}
}
+
+
void
-Extender_engraver::do_process_music ()
+Extender_engraver::finalize ()
{
- if (req_l_)
+ if (extender_)
{
- if (!last_lyric_l_)
- {
- req_l_->origin ()->warning (_ ("Nothing to connect extender to on the left. Ignoring extender request."));
- return;
- }
-
- extender_p_ = new Spanner (get_property ("basicLyricExtenderProperties"));
- extender_p_->set_extent_callback (Score_element::point_dimension_callback, Y_AXIS);
+ completize_extender (extender_);
- Lyric_extender (extender_p_).set_textitem (LEFT, last_lyric_l_);
- announce_element (extender_p_, req_l_);
+ if (!extender_->get_bound (RIGHT))
+ extender_->warning (_ ("unterminated extender"));
+ typeset_grob (extender_);
+ extender_ = 0;
+ }
+
+ if (finished_extender_)
+ {
+ completize_extender (finished_extender_);
+
+ if (!finished_extender_->get_bound (RIGHT))
+ finished_extender_->warning (_("unterminated extender"));
+ typeset_grob (finished_extender_);
+ finished_extender_ =0;
+ }
+}
+
+void
+Extender_engraver::process_music ()
+{
+ if (ev_)
+ {
+ extender_ = make_spanner ("LyricExtender");
+ announce_grob (extender_, ev_->self_scm());
}
}
void
-Extender_engraver::do_pre_move_processing ()
+Extender_engraver::stop_translation_timestep ()
{
- if (extender_p_)
+ if (finished_extender_ && finished_extender_->get_bound (RIGHT))
{
- typeset_element (extender_p_);
- extender_p_ = 0;
+ typeset_grob (finished_extender_);
+ finished_extender_ = 0;
}
- if (current_lyric_l_)
+ if (finished_extender_ && extender_)
{
- last_lyric_l_ = current_lyric_l_;
- current_lyric_l_ =0;
+ programming_error ("Haven't finished extender yet.");
+ typeset_grob (finished_extender_);
+ finished_extender_ =0;
}
-}
+
+ if (extender_)
+ finished_extender_ = extender_;
+ extender_ = 0;
-void
-Extender_engraver::do_post_move_processing ()
-{
- req_l_ = 0;
+ ev_ = 0;
}
+
+ENTER_DESCRIPTION(Extender_engraver,
+/* descr */ "Create lyric extenders",
+/* creats*/ "LyricExtender",
+/* accepts */ "extender-event",
+/* acks */ "lyric-syllable-interface",
+/* reads */ "",
+/* write */ "");
projects / lilypond.git / blobdiff