X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Flyric-extender.cc;h=7343b6bfcd072a3aefc37e6c8dda3fcf60305f23;hb=fe2ea684b9dcdd98146d608a43e27acc881ff3cd;hp=cd207ce9cab7505cbac703bbca386f355b83a222;hpb=867530093ed5374d6e28d2c11a933f3b991c226e;p=lilypond.git

diff --git a/lily/lyric-extender.cc b/lily/lyric-extender.cc
index cd207ce9ca..7343b6bfcd 100644
--- a/lily/lyric-extender.cc
+++ b/lily/lyric-extender.cc
@@ -2,59 +2,118 @@
   lyric-extender.cc -- implement Lyric_extender
   source file of the GNU LilyPond music typesetter
 
-  (c)  1998--2000 Jan Nieuwenhuizen <janneke@gnu.org>
+  (c) 1998--2004 Jan Nieuwenhuizen <janneke@gnu.org>
   Han-Wen Nienhuys
 */
 
+#include <math.h>
 
 #include "box.hh"
-#include "debug.hh"
+#include "warn.hh"
 #include "lookup.hh"
-#include "molecule.hh"
+#include "stencil.hh"
 #include "paper-column.hh"
-#include "paper-def.hh"
+#include "output-def.hh"
 #include "lyric-extender.hh"
+#include "note-head.hh"
+#include "group-interface.hh"
 
+bool
+Lyric_extender::is_visible (Grob *gr)
+{
+  Spanner*me = dynamic_cast<Spanner*> (gr);
+
+  SCM heads = me->get_property ("heads");
+  int l = scm_ilength (heads);
+  if (l == 0)
+    return false;
+  
+  return true;
+}
 
-MAKE_SCHEME_CALLBACK(Lyric_extender,brew_molecule,1)
+MAKE_SCHEME_CALLBACK (Lyric_extender,print,1)
 SCM 
-Lyric_extender::brew_molecule (SCM smob) 
+Lyric_extender::print (SCM smob) 
 {
-  Spanner *sp = dynamic_cast<Spanner*> (unsmob_element (smob));
-
-  // ugh: refp
-  Real leftext = sp->get_bound (LEFT)->extent (sp->get_bound (LEFT),
-					       X_AXIS).length ();
-  Real ss = 1.0;
-  Real sl = sp->paper_l ()->get_var ("stafflinethickness");  
-  Real righttrim = 0.5; // default to half a space gap on the right
-  SCM righttrim_scm = sp->get_elt_property("right-trim-amount");
-  if (gh_number_p (righttrim_scm)) {
-    righttrim = gh_scm2double (righttrim_scm);
-  }
-  // The extender can exist in the word space of the left lyric ...
-  SCM space =  sp->get_bound (LEFT)->get_elt_property ("word-space");
-  if (gh_number_p (space))
+  Spanner *me = unsmob_spanner (smob);
+  Item *l = me->get_bound (LEFT);
+  Item *r = me->get_bound (RIGHT);
+  Grob *common = l->common_refpoint (r, X_AXIS);
+  
+
+  Real sl = me->get_paper ()->get_dimension (ly_symbol2scm ("linethickness"));  
+
+  Link_array<Grob> heads (Pointer_group_interface__extract_grobs (me, (Grob*)0,
+								  "heads"));
+
+  if (!heads.size () && r->break_status_dir () == CENTER)
+    return SCM_EOL;
+
+  common = common_refpoint_of_array (heads, common, X_AXIS);
+  
+  Real left_point = 0.0;
+  if (l->internal_has_interface (ly_symbol2scm ("lyric-syllable-interface")))
+    left_point = l->extent (common, X_AXIS)[RIGHT];
+  else
+    left_point = heads[0]->extent (common, X_AXIS)[LEFT];
+
+  if (isinf (left_point))
+    return SCM_EOL;
+
+  /*
+    It seems that short extenders are even lengthened to go past the
+    note head, but haven't found a pattern in it yet. --hwn 1/1/04
+    
+   */
+  SCM minlen =  me->get_property ("minimum-length");
+  Real right_point
+    = left_point + (robust_scm2double  (minlen,0));
+
+  Spanner *orig = dynamic_cast<Spanner*> (me->original_);
+  bool last_line = orig
+    && (me->get_break_index () == orig->broken_intos_.size () - 2)
+    && !Lyric_extender::is_visible (orig->broken_intos_.top ());
+    
+
+  if (heads.size ())
+    right_point = right_point >? heads.top ()->extent (common, X_AXIS)[RIGHT];
+
+  Real h = sl * robust_scm2double (me->get_property ("thickness"), 0);
+  Real pad = 2* h;
+
+  if (r->internal_has_interface (ly_symbol2scm ("lyric-syllable-interface")))
+    right_point = right_point <? (r->extent (common, X_AXIS)[LEFT] - pad);
+  else if (Note_head::has_interface (r))
+    ; 
+  else if (!last_line)
     {
-      leftext -=  gh_scm2double (space)*ss;
+      /*
+	run to end of line.
+       */
+      right_point = right_point >? (r->extent (common, X_AXIS)[LEFT] - pad);
     }
-  Real w = sp->spanner_length () - leftext - righttrim*ss;
   
-  Real h = sl * gh_scm2double (sp->get_elt_property  ("height"));
-  Molecule  mol (Lookup::filledbox ( Box (Interval (0,w), Interval (0,h))));
-  mol.translate (Offset (leftext, 0));
-  return mol.create_scheme();
-}
+  if (isinf (right_point))
+    {
+      programming_error ("Right point of extender not defined?");
+      right_point = r->relative_coordinate (common, X_AXIS);
+    }  
 
-void
-Lyric_extender::set_textitem (Direction d, Score_element*s)
-{
-  elt_l_->set_bound (d, s);
-  elt_l_->add_dependency (s);
-}
+  left_point += pad;
 
-Lyric_extender::Lyric_extender (Spanner*s)
-{
-  elt_l_ = s;
+  Real w = right_point - left_point;
+
+  if (w < 1.5 * h)
+    return SCM_EOL;
+  
+  Stencil  mol (Lookup::round_filled_box (Box (Interval (0,w), Interval (0,h)),
+					   0.8 * h));
+  mol.translate_axis (left_point - me->relative_coordinate (common, X_AXIS), X_AXIS);
+  return mol.smobbed_copy ();
 }
 
+
+ADD_INTERFACE (Lyric_extender,"lyric-extender-interface",
+  "The extender is a simple line at the baseline of the lyric "
+  " that helps show the length of a melissima (tied/slurred note).",
+  "thickness heads");