lyric-extender.cc -- implement Lyric_extender
source file of the GNU LilyPond music typesetter
- (c) 1998--2003 Jan Nieuwenhuizen <janneke@gnu.org>
+ (c) 1998--2004 Jan Nieuwenhuizen <janneke@gnu.org>
Han-Wen Nienhuys
*/
+#include <math.h>
#include "box.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"
-MAKE_SCHEME_CALLBACK (Lyric_extender,brew_molecule,1)
+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,print,1)
SCM
-Lyric_extender::brew_molecule (SCM smob)
+Lyric_extender::print (SCM smob)
{
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 left_point = l->extent (common, X_AXIS)[RIGHT];
- Real sl = me->get_paper ()->get_realvar (ly_symbol2scm ("linethickness"));
+ 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
+ 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
*/
- Real right_point = r->extent (common, X_AXIS)
- [(Note_head::has_interface (r)) ? RIGHT : LEFT];
+ 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)
+ {
+ /*
+ run to end of line.
+ */
+ right_point = right_point >? (r->extent (common, X_AXIS)[LEFT] - pad);
+ }
+ if (isinf (right_point))
+ {
+ programming_error ("Right point of extender not defined?");
+ right_point = r->relative_coordinate (common, X_AXIS);
+ }
+
+ left_point += pad;
+
Real w = right_point - left_point;
- Real h = sl * gh_scm2double (me->get_grob_property ("thickness"));
+ if (w < 1.5 * h)
+ return SCM_EOL;
- Molecule mol (Lookup::filledbox (Box (Interval (0,w), Interval (0,h))));
+ 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 ();
}
-void
-Lyric_extender::set_textitem (Spanner *me, Direction d, Grob *s)
-{
- me->set_bound (d, s);
- me->add_dependency (s);
-}
-
-
-
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");
+ "thickness heads");