patch::: 1.1.37.script1

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

diff --git a/lily/extender-engraver.cc b/lily/extender-engraver.cc
index 32c3e5787fcfa1950e58cf21aedf1edb076370ad..1f616ec7951d674babd835f43069020e40c55085 100644 (file)
--- a/lily/extender-engraver.cc
+++ b/lily/extender-engraver.cc
@@ -1,57 +1,56 @@
 /*
   extender-engraver.cc -- implement Extender_engraver
 
-  (c) 1998 Jan Nieuwenhuizen <janneke@gnu.org>
+  (c) 1998--1999 Jan Nieuwenhuizen <janneke@gnu.org>
 */
 
 #include "proto.hh"
 #include "musical-request.hh"
 #include "extender-engraver.hh"
 #include "extender-spanner.hh"
-#include "text-def.hh"
 #include "score-column.hh"
-#include "text-item.hh"
+#include "g-text-item.hh"
 
 ADD_THIS_TRANSLATOR (Extender_engraver);
 
 Extender_engraver::Extender_engraver ()
 {
   extender_spanner_p_ = 0;
-  span_reqs_drul_[RIGHT] = span_reqs_drul_[LEFT] = 0;
+  req_l_ = 0;
 }
 
 void
 Extender_engraver::acknowledge_element (Score_element_info i)
 {
-  Text_item* t = (dynamic_cast<Text_item*> (i.elem_l_));
-  if (!t)
-    return;
-  if (!extender_spanner_p_)
-    return;
-  if (!span_reqs_drul_[LEFT])
-    return;
-
-  if (!extender_spanner_p_->textitem_l_drul_[LEFT])
-    extender_spanner_p_->set_textitem (LEFT, t);
-  else
-    if (span_reqs_drul_[RIGHT] && !extender_spanner_p_->textitem_l_drul_[RIGHT]) 
-      extender_spanner_p_->set_textitem (RIGHT, t);
+  if (G_text_item* t = dynamic_cast<G_text_item*> (i.elem_l_))
+    {
+      Rhythmic_req * rh = dynamic_cast<Rhythmic_req*>  (i.req_l_);
+      if (!rh)
+       return;
+
+      now_lyrics_.push (Text_lyric_tuple (t, rh, now_mom () + rh->length_mom ()));
+      /*
+       UGH.  What do we do in case of multiple alternatives? 
+       */
+      if (extender_spanner_p_
+         && !extender_spanner_p_->spanned_drul_[RIGHT]
+           )
+         {
+           extender_spanner_p_->set_textitem (RIGHT, t);
+         }
+    }
 }
 
+
 bool
 Extender_engraver::do_try_music (Music* req_l)
 {
   if (Extender_req* p = dynamic_cast <Extender_req *> (req_l))
     {
-      if (bool (extender_spanner_p_) == bool (p->spantype == Span_req::START))
-       return false;
-
-      Direction d = (!extender_spanner_p_) ? LEFT : RIGHT;
-      if (span_reqs_drul_[d] && !span_reqs_drul_[d]->equal_b (p))
+      if (req_l_)
        return false;
 
-      span_reqs_drul_[d] = p;
-      span_mom_drul_[d] = get_staff_info ().musical_l ()->when ();
+      req_l_ = p;
       return true;
     }
   return false;
@@ -62,34 +61,81 @@ Extender_engraver::do_removal_processing ()
 {
   if (extender_spanner_p_)
     {
-      span_reqs_drul_[LEFT]->warning (_ ("unterminated extender"));
-      extender_spanner_p_->unlink ();
-      delete extender_spanner_p_;
-      extender_spanner_p_ = 0;
-      span_reqs_drul_[RIGHT] = span_reqs_drul_[LEFT] = 0;
+      req_l_->warning (_ ("unterminated extender"));
+      extender_spanner_p_->set_bounds(RIGHT, get_staff_info ().command_pcol_l ());
     }
 }
 
 void
 Extender_engraver::do_process_requests ()
 {
-  if (extender_spanner_p_ || !span_reqs_drul_[LEFT])
-    return;
+  Array<Text_lyric_tuple> stopped_texts;
+  Moment now = now_mom ();
 
-  extender_spanner_p_ = new Extender_spanner;
+  stopped_texts.clear ();
+  while (past_lyrics_pq_.size ()
+        && past_lyrics_pq_.front ().end_ == now)
+    stopped_texts.push (past_lyrics_pq_.get ());
 
-  announce_element (Score_element_info (extender_spanner_p_, span_reqs_drul_[LEFT]));
+  if (req_l_)
+    {
+      if (!stopped_texts.size ())
+       {
+         req_l_->warning ("Nothing to connect extender to on the left. Ignoring extender request");
+         return;
+       }
+      
+      extender_spanner_p_ = new Extender_spanner;
+      extender_spanner_p_->set_textitem  (LEFT, stopped_texts[0].text_l_);
+      announce_element (Score_element_info (extender_spanner_p_, req_l_));
+    }
 }
 
+
 void
 Extender_engraver::do_pre_move_processing ()
 {
-  if (!extender_spanner_p_ || !span_reqs_drul_[RIGHT]) 
-    return;
+  for (int i=0; i < now_lyrics_.size (); i++)
+    {
+      past_lyrics_pq_.insert (now_lyrics_[i]);
+    }
+  now_lyrics_.clear ();
 
-  typeset_element (extender_spanner_p_);
-  
-  extender_spanner_p_ = 0;
-  span_reqs_drul_[RIGHT] = span_reqs_drul_[LEFT] = 0;
+  if (extender_spanner_p_)
+    {
+      typeset_element (extender_spanner_p_);
+      extender_spanner_p_ = 0;
+    }
+}
+void
+Extender_engraver::do_post_move_processing ()
+{
+  Moment now = now_mom ();
+  while (past_lyrics_pq_.size () && past_lyrics_pq_.front ().end_ < now)
+    past_lyrics_pq_.delmin ();
+
+  req_l_ =0;
+}
+
+/**********************************************************************/
+Text_lyric_tuple::Text_lyric_tuple ()
+{
+  text_l_ =0;
+  req_l_ =0;
+  end_ = 0;
+}
+
+Text_lyric_tuple::Text_lyric_tuple (G_text_item *h, Rhythmic_req*m, Moment mom)
+{
+  text_l_ = h;
+  req_l_ = m;
+  end_ = mom;
 }
 
+
+int
+Text_lyric_tuple::time_compare (Text_lyric_tuple const&h1,
+                            Text_lyric_tuple const &h2)
+{
+  return (h1.end_ - h2.end_ ).sign ();
+}