2 text-spanner.cc -- implement Text_spanner
4 source file of the GNU LilyPond music typesetter
6 (c) 2000--2003 Jan Nieuwenhuizen <janneke@gnu.org>
8 Revised over good by Han-Wen.
11 #include "molecule.hh"
12 #include "text-item.hh"
13 #include "text-spanner.hh"
14 #include "line-spanner.hh"
16 #include "font-interface.hh"
17 #include "dimensions.hh"
18 #include "paper-def.hh"
20 #include "paper-column.hh"
21 #include "staff-symbol-referencer.hh"
25 - vertical start / vertical end (fixme-name) |
26 - contination types (vert. star, vert. end) |-> eat volta-bracket
28 - more texts/positions
31 MAKE_SCHEME_CALLBACK (Text_spanner, brew_molecule, 1);
34 TODO: this function is too long
37 Text_spanner::brew_molecule (SCM smob)
39 Grob *me= unsmob_grob (smob);
40 Spanner *spanner = dynamic_cast<Spanner*> (me);
42 /* Ugh, must be same as Hairpin::brew_molecule. */
43 Real padding = robust_scm2double ( me->get_grob_property ("if-text-padding"), 0);
45 Grob *common = spanner->get_bound (LEFT)->common_refpoint (spanner->get_bound (RIGHT), X_AXIS);
46 Paper_def * paper = me->get_paper();
48 SCM flare = me->get_grob_property ("bracket-flare");
49 SCM shorten = me->get_grob_property ("shorten-pair");
52 Drul_array<bool> broken;
56 Item *b = spanner->get_bound (d);
57 broken[d] = b->break_status_dir () != CENTER;
62 span_points[d] = spanner->get_broken_left_end_align ();
64 span_points[d] = b->relative_coordinate (common, X_AXIS);
68 bool encl = to_boolean (me->get_grob_property ("enclose-bounds"));
69 span_points[d] = b->extent (common, X_AXIS)[encl ? d : -d];
71 if (is_number_pair (shorten))
72 span_points -= d * gh_scm2double (index_get_cell (shorten, d));
75 if (is_number_pair (flare))
76 span_points -= d * gh_scm2double (index_get_cell (flare, d));
78 while (flip (&d) != LEFT);
81 SCM properties = Font_interface::font_alist_chain (me);
82 SCM edge_text = me->get_grob_property ("edge-text");
83 Drul_array<Molecule> edge;
84 if (gh_pair_p (edge_text))
89 if (!to_boolean (me->get_grob_property ("text-repeat-if-broken"))
93 SCM text = index_get_cell (edge_text, d);
95 if (Text_item::markup_p (text))
96 edge[d] = *unsmob_molecule (Text_item::interpret_markup (paper->self_scm (), properties, text));
98 if (!edge[d].is_empty ())
99 edge[d].align_to (Y_AXIS, CENTER);
101 while (flip (&d) != LEFT);
104 Drul_array<Real> edge_height = robust_scm2interval (me->get_grob_property ("edge-height"),
105 Interval (1.0, 1.0));
106 Drul_array<Molecule> edge_line;
109 int dir = to_dir (me->get_grob_property ("direction"));
116 if (is_number_pair (flare))
117 dx = gh_scm2double (index_get_cell (flare, d)) * d;
119 Real dy = - dir * edge_height[d] ;
121 edge_line[d] = Line_spanner::line_molecule (me, Offset(0,0), Offset (dx, dy));
123 while (flip (&d) != LEFT);
129 Interval ext = edge[d].extent (X_AXIS);
130 if (!ext.is_empty ())
132 edge[d].translate_axis (span_points[d], X_AXIS);
133 m.add_molecule (edge[d]);
134 span_points[d] += -d * ext[-d];
137 while (flip (&d) != LEFT);
140 if (d* span_points[d] > d * edge[-d].extent(X_AXIS)[d])
142 edge_line[d].translate_axis (span_points[d], X_AXIS);
143 m.add_molecule (edge_line[d]);
146 while (flip (&d) != LEFT);
148 if (!span_points.is_empty ())
150 Molecule l =Line_spanner::line_molecule (me, Offset (span_points[LEFT], 0),
151 Offset (span_points[RIGHT], 0));
154 m.translate_axis (- me->relative_coordinate (common, X_AXIS), X_AXIS);
155 return m.smobbed_copy ();
158 ADD_INTERFACE (Text_spanner,"text-spanner-interface",
159 "generic text spanner",
160 "text-repeat-if-broken dash-period if-text-padding dash-fraction edge-height bracket-flare edge-text shorten-pair style thickness enclose-bounds width-correct");