2 dynamic-text-spanner.cc -- implement Text_spanner
4 source file of the GNU LilyPond music typesetter
6 (c) 2000--2006 Jan Nieuwenhuizen <janneke@gnu.org>
8 Revised over good by Han-Wen.
11 #include "text-interface.hh"
12 #include "text-spanner.hh"
13 #include "line-spanner.hh"
15 #include "font-interface.hh"
16 #include "dimensions.hh"
17 #include "output-def.hh"
19 #include "paper-column.hh"
21 class Dynamic_text_spanner
24 DECLARE_SCHEME_CALLBACK (print, (SCM));
25 static bool has_interface (Grob *);
29 This is a partial C&P from text-spanner.cc
31 Dynamic_text_spanner is similar, but
33 * does not require bracket functionality.
35 * should make room for spanning points (mf/f/mp texts).
37 * In the future, we should support
39 cresc - - - - poco - - - a - - - - poco - - -
44 The cut & paste is rather inelegant, but text-spanner was a failed
45 and buggy attempt at being generic.
47 MAKE_SCHEME_CALLBACK (Dynamic_text_spanner, print, 1);
49 Dynamic_text_spanner::print (SCM smob)
51 Grob *me = unsmob_grob (smob);
52 Spanner *spanner = dynamic_cast<Spanner *> (me);
54 Grob *common = spanner->get_bound (LEFT)->common_refpoint (spanner->get_bound (RIGHT), X_AXIS);
55 Output_def *layout = me->layout ();
58 Drul_array<bool> broken;
62 Item *b = spanner->get_bound (d);
63 broken[d] = b->break_status_dir () != CENTER;
68 span_points[d] = spanner->get_broken_left_end_align ();
70 span_points[d] = b->relative_coordinate (common, X_AXIS);
76 if (b->internal_has_interface (ly_symbol2scm ("dynamic-interface")))
78 pad = robust_scm2double (me->get_property ("bound-padding"), 0.0);
85 if (d == RIGHT && me->get_property ("style") == ly_symbol2scm ("trill"))
91 Interval ext = b->extent (common, X_AXIS);
92 span_points[d] = -d * pad
93 + robust_relative_extent (b, common, X_AXIS)
94 .linear_combination (encl);
97 while (flip (&d) != LEFT);
100 SCM properties = Font_interface::text_font_alist_chain (me);
101 SCM edge_text = me->get_property ("edge-text");
102 Drul_array<Stencil> edge;
103 if (scm_is_pair (edge_text))
111 SCM text = index_get_cell (edge_text, d);
113 if (Text_interface::is_markup (text))
114 edge[d] = *unsmob_stencil (Text_interface::interpret_markup (layout->self_scm (), properties, text));
116 if (!edge[d].is_empty ())
117 edge[d].align_to (Y_AXIS, CENTER);
119 while (flip (&d) != LEFT);
124 Interval ext = edge[d].extent (X_AXIS);
125 Real pad = robust_scm2double (me->get_property ("bound-padding"), 0.0);
126 if (!ext.is_empty ())
128 edge[d].translate_axis (span_points[d], X_AXIS);
129 m.add_stencil (edge[d]);
130 span_points[d] += -d * (ext[-d] + pad);
133 while (flip (&d) != LEFT);
135 if (!span_points.is_empty ()
136 && span_points.length () > robust_scm2double (me->get_property ("dash-period"), 0.0))
138 Stencil l = Line_spanner::line_stencil (me,
139 Offset (span_points[LEFT], 0),
140 Offset (span_points[RIGHT], 0));
143 m.translate_axis (- me->relative_coordinate (common, X_AXIS), X_AXIS);
144 return m.smobbed_copy ();
147 ADD_INTERFACE (Dynamic_text_spanner,
148 "dynamic-text-spanner-interface",
149 "A text spanner for crescendo texts",