/*
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 "proto.hh"
-#include "musical-request.hh"
-#include "hyphen-engraver.hh"
+#include "warn.hh"
#include "hyphen-spanner.hh"
-#include "paper-column.hh"
-#include "text-item.hh"
+#include "item.hh"
+#include "engraver.hh"
+
+class Hyphen_engraver : public Engraver
+{
+ Music* ev_;
+ Spanner* hyphen_;
+ Spanner * finished_hyphen_;
+public:
+ 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 process_music ();
+private:
+
+};
+
+
-ADD_THIS_TRANSLATOR (Hyphen_engraver);
Hyphen_engraver::Hyphen_engraver ()
{
- current_lyric_l_ = 0;
- last_lyric_l_ = 0;
- hyphen_spanner_p_ = 0;
- req_l_ = 0;
+ hyphen_ = 0;
+ finished_hyphen_ = 0;
+ ev_ = 0;
}
void
-Hyphen_engraver::acknowledge_element (Score_element_info i)
+Hyphen_engraver::acknowledge_grob (Grob_info i)
{
- if (Text_item* t = dynamic_cast<Text_item*> (i.elem_l_))
+ Item * item = dynamic_cast<Item*> (i.grob_);
+ // -> text_item
+ if (item && item->internal_has_interface (ly_symbol2scm ("lyric-syllable-interface")))
{
- current_lyric_l_ = t;
- if (hyphen_spanner_p_
- && !hyphen_spanner_p_->get_bound (RIGHT)
- )
- {
- hyphen_spanner_p_->set_textitem (RIGHT, t);
- }
+ if (hyphen_)
+ hyphen_->set_bound (LEFT, item);
+
+ if (finished_hyphen_)
+ finished_hyphen_->set_bound (RIGHT, item);
}
}
bool
-Hyphen_engraver::do_try_music (Music* r)
+Hyphen_engraver::try_music (Music* r)
{
- if (Hyphen_req* p = dynamic_cast <Hyphen_req *> (r))
- {
- if (req_l_)
- return false;
+ if (ev_)
+ return false;
+
+ ev_ = r;
+ return true;
+}
- req_l_ = p;
- return true;
+void
+completize_hyphen (Spanner* sp)
+{
+ if (!sp->get_bound (RIGHT))
+ {
+ 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);
+ }
}
- return false;
}
+
+
void
-Hyphen_engraver::do_removal_processing ()
+Hyphen_engraver::finalize ()
{
- if (hyphen_spanner_p_)
+ if (hyphen_)
{
- req_l_->warning (_ ("unterminated hyphen"));
- hyphen_spanner_p_->set_bound(RIGHT, get_staff_info ().command_pcol_l ());
+ completize_hyphen (hyphen_);
+
+ if (!hyphen_->get_bound (RIGHT))
+ hyphen_->warning (_ ("unterminated hyphen"));
+ typeset_grob (hyphen_);
+ hyphen_ = 0;
+ }
+
+ if (finished_hyphen_)
+ {
+ completize_hyphen (finished_hyphen_);
+
+ if (!finished_hyphen_->get_bound (RIGHT))
+ finished_hyphen_->warning (_("unterminated hyphen"));
+ typeset_grob (finished_hyphen_);
+ finished_hyphen_ =0;
}
}
void
-Hyphen_engraver::do_process_music ()
+Hyphen_engraver::process_music ()
{
- if (req_l_)
+ if (ev_)
{
- if (!last_lyric_l_)
- {
- req_l_->warning (_ ("Nothing to connect hyphen to on the left. Ignoring hyphen request."));
- return;
- }
-
- hyphen_spanner_p_ = new Hyphen_spanner (get_property ("basicHyphenSpannerProperties"));
- hyphen_spanner_p_->set_textitem (LEFT, last_lyric_l_);
- announce_element (Score_element_info (hyphen_spanner_p_, req_l_));
+ hyphen_ = make_spanner ("LyricHyphen");
+ announce_grob (hyphen_, ev_->self_scm());
}
}
void
-Hyphen_engraver::do_pre_move_processing ()
+Hyphen_engraver::stop_translation_timestep ()
{
- if (hyphen_spanner_p_)
+ if (finished_hyphen_ && finished_hyphen_->get_bound (RIGHT))
{
- typeset_element (hyphen_spanner_p_);
- hyphen_spanner_p_ = 0;
+ typeset_grob (finished_hyphen_);
+ finished_hyphen_ = 0;
}
- if (current_lyric_l_)
+ if (finished_hyphen_ && hyphen_)
{
- last_lyric_l_ = current_lyric_l_;
- current_lyric_l_ =0;
+ programming_error ("Haven't finished hyphen yet.");
+ typeset_grob (finished_hyphen_);
+ finished_hyphen_ =0;
}
-}
+
+ if (hyphen_)
+ finished_hyphen_ = hyphen_;
+ hyphen_ = 0;
-void
-Hyphen_engraver::do_post_move_processing ()
-{
- req_l_ = 0;
+ ev_ = 0;
}
+
+
+ENTER_DESCRIPTION(Hyphen_engraver,
+/* descr */ "Create lyric hyphens",
+/* creats*/ "LyricHyphen",
+/* accepts */ "hyphen-event",
+/* acks */ "lyric-syllable-interface",
+/* reads */ "",
+/* write */ "");