``slikken kreng''

[lilypond.git] / lily / hyphen-engraver.cc

diff --git a/lily/hyphen-engraver.cc b/lily/hyphen-engraver.cc
index 4fccd9cb540cabd241d9eeae1bcbe8d6de6b7655..6d5fd573f7edf49b65a885dc638e1d4209d8d8ba 100644 (file)
--- a/lily/hyphen-engraver.cc
+++ b/lily/hyphen-engraver.cc
@@ -4,102 +4,138 @@
   (c) 1999 Glen Prideaux <glenprideaux@iname.com>
 */
 
-#include "proto.hh"
+#include "flower-proto.hh"
 #include "musical-request.hh"
-#include "hyphen-engraver.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
+  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_;
+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_spanner (hyphen_).set_textitem (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_ = p;
       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 request."));
          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_spanner (hyphen_).set_textitem (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",
+/* acks  */       "lyric-syllable-interface",
+/* reads */       "",
+/* write */       "");