/*
hyphen-engraver.cc -- implement Hyphen_engraver
- (c) 1999 Glen Prideaux <glenprideaux@iname.com>
+ 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 "hyphen-spanner.hh"
-#include "paper-column.hh"
+#include "warn.hh"
#include "item.hh"
#include "engraver.hh"
+#include "spanner.hh"
-/**
- Generate an centred hyphen. Should make a Hyphen_spanner that
- typesets a nice centred hyphen 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 Hyphen_engraver : public Engraver
{
- Grob *last_lyric_;
- Grob *current_lyric_;
- Hyphen_req* req_;
- Spanner* hyphen_;
+ Music *ev_;
+ Spanner *hyphen_;
+ Spanner *finished_hyphen_;
public:
- TRANSLATOR_DECLARATIONS(Hyphen_engraver);
+ TRANSLATOR_DECLARATIONS (Hyphen_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_acknowledged_grobs ();
+ virtual void process_music ();
private:
};
+
Hyphen_engraver::Hyphen_engraver ()
{
- current_lyric_ = 0;
- last_lyric_ = 0;
hyphen_ = 0;
- req_ = 0;
+ finished_hyphen_ = 0;
+ ev_ = 0;
}
void
Hyphen_engraver::acknowledge_grob (Grob_info i)
{
- // -> text-item
- if (i.grob_->internal_has_interface (ly_symbol2scm ("lyric-syllable-interface")))
+ Item * item = dynamic_cast<Item*> (i.grob_);
+ // -> text_item
+ if (item && item->internal_has_interface (ly_symbol2scm ("lyric-syllable-interface")))
{
- current_lyric_ = i.grob_;
- if (hyphen_
- && !hyphen_->get_bound (RIGHT)
- )
- {
- Hyphen_spanner (hyphen_).set_textitem (RIGHT, i.grob_);
- }
+ if (hyphen_)
+ hyphen_->set_bound (LEFT, item);
+
+ if (finished_hyphen_)
+ finished_hyphen_->set_bound (RIGHT, item);
}
}
bool
Hyphen_engraver::try_music (Music* r)
{
- if (Hyphen_req* p = dynamic_cast <Hyphen_req *> (r))
- {
- if (req_)
- return false;
+ if (ev_)
+ return false;
- req_ = p;
- return true;
- }
- return false;
+ ev_ = r;
+ return true;
}
void
-Hyphen_engraver::finalize ()
+completize_hyphen (Spanner* sp)
{
- if (hyphen_)
+ if (!sp->get_bound (RIGHT))
{
- req_->origin ()->warning (_ ("unterminated hyphen"));
- hyphen_->set_bound (RIGHT, unsmob_grob (get_property ("currentCommandColumn")));
+ SCM heads = sp->get_property ("heads");
+ if (ly_c_pair_p (heads))
+ {
+ Item* it = dynamic_cast<Item*> (unsmob_grob (ly_car (heads)));
+ if (it)
+ sp->set_bound (RIGHT, it);
+ }
}
}
+
+
void
-Hyphen_engraver::process_acknowledged_grobs ()
+Hyphen_engraver::finalize ()
{
- if (req_ &&! hyphen_)
+ if (hyphen_)
{
- if (!last_lyric_)
+ completize_hyphen (hyphen_);
+
+ if (!hyphen_->get_bound (RIGHT))
{
- req_->origin ()->warning (_ ("Nothing to connect hyphen to on the left. Ignoring hyphen request."));
- return;
+ hyphen_->warning (_ ("removing unterminated hyphen"));
+ hyphen_->suicide ();
}
-
- hyphen_ = new Spanner (get_property ("LyricHyphen"));
- Hyphen_spanner (hyphen_).set_textitem (LEFT, last_lyric_);
- announce_grob(hyphen_, req_->self_scm());
+ hyphen_ = 0;
+ }
+
+ if (finished_hyphen_)
+ {
+ completize_hyphen (finished_hyphen_);
+
+ if (!finished_hyphen_->get_bound (RIGHT))
+ {
+ finished_hyphen_->warning (_("unterminated hyphen; removing"));
+ finished_hyphen_->suicide ();
+ }
+ finished_hyphen_ =0;
+ }
+}
+
+void
+Hyphen_engraver::process_music ()
+{
+ if (ev_)
+ {
+ hyphen_ = make_spanner ("LyricHyphen", ev_->self_scm ()
+);
}
}
void
Hyphen_engraver::stop_translation_timestep ()
{
- if (hyphen_)
+ if (finished_hyphen_ && finished_hyphen_->get_bound (RIGHT))
{
- typeset_grob (hyphen_);
- hyphen_ = 0;
+ finished_hyphen_ = 0;
}
- if (current_lyric_)
+ if (finished_hyphen_ && hyphen_)
{
- last_lyric_ = current_lyric_;
- current_lyric_ =0;
+ programming_error ("Haven't finished hyphen yet.");
+ finished_hyphen_ =0;
}
-}
+
+ if (hyphen_)
+ finished_hyphen_ = hyphen_;
+ hyphen_ = 0;
-void
-Hyphen_engraver::start_translation_timestep ()
-{
- req_ = 0;
+ ev_ = 0;
}
-ENTER_DESCRIPTION(Hyphen_engraver,
+
+
+ENTER_DESCRIPTION (Hyphen_engraver,
/* descr */ "Create lyric hyphens",
/* creats*/ "LyricHyphen",
-/* accepts */ "general-music",
+/* accepts */ "hyphen-event",
/* acks */ "lyric-syllable-interface",
/* reads */ "",
/* write */ "");