/*
hyphen-engraver.cc -- implement Hyphen_engraver
- (c) 1999 Glen Prideaux <glenprideaux@iname.com>
+ source file of the GNU LilyPond music typesetter
+
+ (c) 1999--2003 Glen Prideaux <glenprideaux@iname.com>
*/
-#include "proto.hh"
-#include "musical-request.hh"
-#include "hyphen-engraver.hh"
+#include "flower-proto.hh"
+#include "event.hh"
#include "hyphen-spanner.hh"
-#include "score-column.hh"
-#include "text-item.hh"
-#include "extender-engraver.hh"
+#include "paper-column.hh"
+#include "item.hh"
+#include "engraver.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
+ 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 Hyphen_engraver : public Engraver
+{
+ Grob *last_lyric_;
+ Grob *current_lyric_;
+ Music* req_;
+ Spanner* 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 start_translation_timestep ();
+ virtual void process_acknowledged_grobs ();
+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;
+ current_lyric_ = 0;
+ last_lyric_ = 0;
+ hyphen_ = 0;
+ req_ = 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_))
+ // -> text-item
+ if (i.grob_->internal_has_interface (ly_symbol2scm ("lyric-syllable-interface")))
{
- current_lyric_l_ = t;
- if (hyphen_spanner_p_
- && !hyphen_spanner_p_->spanned_drul_[RIGHT]
- )
+ current_lyric_ = i.grob_;
+ if (hyphen_
+ && !hyphen_->get_bound (RIGHT))
{
- hyphen_spanner_p_->set_textitem (RIGHT, t);
+ hyphen_->set_bound (RIGHT, i.grob_);
}
}
}
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_)
+ if (req_)
return false;
- req_l_ = p;
+ req_ = r;
return true;
- }
- 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_bounds(RIGHT, get_staff_info ().command_pcol_l ());
+ req_->origin ()->warning (_ ("unterminated hyphen"));
+ hyphen_->set_bound (RIGHT, unsmob_grob (get_property ("currentCommandColumn")));
}
}
void
-Hyphen_engraver::do_process_requests ()
+Hyphen_engraver::process_acknowledged_grobs ()
{
- if (req_l_)
+ if (req_ &&! hyphen_)
{
- if (!last_lyric_l_)
+ if (!last_lyric_)
{
- req_l_->warning (_ ("Nothing to connect hyphen to on the left. Ignoring hyphen request."));
+ req_->origin ()->warning (_ ("Nothing to connect hyphen to on the left. Ignoring hyphen event."));
return;
}
- hyphen_spanner_p_ = new Hyphen_spanner;
- hyphen_spanner_p_->set_textitem (LEFT, last_lyric_l_);
- announce_element (Score_element_info (hyphen_spanner_p_, req_l_));
+ hyphen_ = new Spanner (get_property ("LyricHyphen"));
+
+ hyphen_->set_bound (LEFT, last_lyric_);
+ announce_grob(hyphen_, req_->self_scm());
}
}
void
-Hyphen_engraver::do_pre_move_processing ()
+Hyphen_engraver::stop_translation_timestep ()
{
- if (hyphen_spanner_p_)
+ if (hyphen_)
{
- typeset_element (hyphen_spanner_p_);
- hyphen_spanner_p_ = 0;
+ typeset_grob (hyphen_);
+ hyphen_ = 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
-Hyphen_engraver::do_post_move_processing ()
+Hyphen_engraver::start_translation_timestep ()
{
- req_l_ = 0;
+ req_ = 0;
}
+ENTER_DESCRIPTION(Hyphen_engraver,
+/* descr */ "Create lyric hyphens",
+/* creats*/ "LyricHyphen",
+/* accepts */ "hyphen-event",
+/* acks */ "lyric-syllable-interface",
+/* reads */ "",
+/* write */ "");