lyric-extender.cc -- implement Lyric_extender
source file of the GNU LilyPond music typesetter
- (c) 1998--2000 Jan Nieuwenhuizen <janneke@gnu.org>
+ (c) 1998--2006 Jan Nieuwenhuizen <janneke@gnu.org>
+ Han-Wen Nienhuys
*/
-/*
- TODO: too complicated implementation. Why the dx_drul?.
- */
+#include "lyric-extender.hh"
+
-#
-#include "dimension-cache.hh"
-#include "box.hh"
-#include "debug.hh"
+#include "warn.hh"
#include "lookup.hh"
-#include "molecule.hh"
#include "paper-column.hh"
-#include "paper-def.hh"
-#include "extender-spanner.hh"
-
-Lyric_extender::Lyric_extender (SCM s)
- : Spanner (s)
+#include "output-def.hh"
+#include "note-head.hh"
+#include "pointer-group-interface.hh"
+MAKE_SCHEME_CALLBACK (Lyric_extender, print, 1)
+ SCM
+Lyric_extender::print (SCM smob)
{
- dx_f_drul_[LEFT] = dx_f_drul_[RIGHT] = 0.0;
- set_extent_callback (Score_element::point_dimension_callback, Y_AXIS);
-}
+ Spanner *me = unsmob_spanner (smob);
+ Item *left_edge = me->get_bound (LEFT);
+ Item *right_text = unsmob_item (me->get_object ("next"));
+ Grob *common = left_edge;
+ if (right_text)
+ common = common->common_refpoint (right_text, X_AXIS);
+ common = common->common_refpoint (me->get_bound (RIGHT), X_AXIS);
+ Real sl = me->layout ()->get_dimension (ly_symbol2scm ("linethickness"));
-MAKE_SCHEME_SCORE_ELEMENT_CALLBACKS(Lyric_extender)
-Molecule
-Lyric_extender::do_brew_molecule () const
-{
- Molecule mol;
+ extract_grob_set (me, "heads", heads);
- Real w = spanner_length ();
-
- w += (dx_f_drul_[RIGHT] - dx_f_drul_[LEFT]);
- Real h = paper_l ()->get_var ("extender_height");
- Molecule a = lookup_l ()->filledbox ( Box (Interval (0,w), Interval (0,h)));
- a.translate (Offset (dx_f_drul_[LEFT], 0));
+ if (!heads.size ())
+ return SCM_EOL;
- mol.add_molecule (a);
+ common = common_refpoint_of_array (heads, common, X_AXIS);
- return mol;
-}
+ Real left_point = 0.0;
+ if (left_edge->internal_has_interface (ly_symbol2scm ("lyric-syllable-interface")))
+ left_point = left_edge->extent (common, X_AXIS)[RIGHT];
+ else if (heads.size ())
+ left_point = heads[0]->extent (common, X_AXIS)[LEFT];
+ else
+ left_point = left_edge->extent (common, X_AXIS)[RIGHT];
+ 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));
-void
-Lyric_extender::after_line_breaking ()
-{
- // UGH
- Real gap = paper_l ()->get_var ("interline");
-
- Direction d = LEFT;
- do
- {
- Item* t = get_bound (d)
- ? get_bound (d) : get_bound ((Direction)-d);
- if (d == LEFT)
- dx_f_drul_[d] += t->extent (X_AXIS).length ();
- else
- dx_f_drul_[d] -= d * gap / 2;
- }
- while (flip(&d) != LEFT);
-}
+ if (heads.size ())
+ right_point = max (right_point, heads.top ()->extent (common, X_AXIS)[RIGHT]);
-
-void
-Lyric_extender::set_textitem (Direction d, Item* textitem_l)
-{
- set_bound (d, textitem_l);
- add_dependency (textitem_l);
-}
+ Real h = sl * robust_scm2double (me->get_property ("thickness"), 0);
+ Real pad = 2* h;
+
+ if (right_text)
+ right_point = min (right_point, (robust_relative_extent (right_text, common, X_AXIS)[LEFT] - pad));
+
+ /* run to end of line. */
+ if (me->get_bound (RIGHT)->break_status_dir ())
+ right_point = max (right_point, (robust_relative_extent (me->get_bound (RIGHT), common, X_AXIS)[LEFT] - pad));
+ left_point += pad;
+ 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).",
+ "next thickness heads");