3 crescendo-text-spanner.cc -- implement Text_spanner
5 source file of the GNU LilyPond music typesetter
7 (c) 2000--2005 Jan Nieuwenhuizen <janneke@gnu.org>
9 Revised over good by Han-Wen.
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 "output-def.hh"
20 #include "paper-column.hh"
24 class Dynamic_text_spanner
27 DECLARE_SCHEME_CALLBACK (print, (SCM));
28 static bool has_interface (Grob*);
34 This is a partial C&P from text-spanner.cc
36 Dynamic_text_spanner is similar, but
38 * does not require bracket functionality.
40 * should make room for spanning points (mf/f/mp texts).
42 * In the future, we should support
44 cresc - - - - poco - - - a - - - - poco - - -
49 The cut & paste is rather inelegant, but text-spanner was a failed
50 and buggy attempt at being generic.
54 MAKE_SCHEME_CALLBACK (Dynamic_text_spanner, print, 1);
56 Dynamic_text_spanner::print (SCM smob)
58 Grob *me = unsmob_grob (smob);
59 Spanner *spanner = dynamic_cast<Spanner*> (me);
61 Grob *common = spanner->get_bound (LEFT)->common_refpoint (spanner->get_bound (RIGHT), X_AXIS);
62 Output_def * layout = me->get_layout ();
65 Drul_array<bool> broken;
69 Item *b = spanner->get_bound (d);
70 broken[d] = b->break_status_dir () != CENTER;
75 span_points[d] = spanner->get_broken_left_end_align ();
77 span_points[d] = b->relative_coordinate (common, X_AXIS);
83 if (b->internal_has_interface (ly_symbol2scm ("dynamic-interface")))
85 pad = robust_scm2double (me->get_property ("bound-padding"), 0.0);
89 Interval ext = b->extent (common, X_AXIS);
90 span_points[d] = -d * pad
91 + robust_relative_extent (b, common, X_AXIS)
92 .linear_combination (encl);
95 while (flip (&d) != LEFT);
99 SCM properties = Font_interface::text_font_alist_chain (me);
100 SCM edge_text = me->get_property ("edge-text");
101 Drul_array<Stencil> edge;
102 if (scm_is_pair (edge_text))
110 SCM text = index_get_cell (edge_text, d);
112 if (Text_interface::markup_p (text))
113 edge[d] = *unsmob_stencil (Text_interface::interpret_markup (layout->self_scm (), properties, text));
115 if (!edge[d].is_empty ())
116 edge[d].align_to (Y_AXIS, CENTER);
118 while (flip (&d) != LEFT);
123 Interval ext = edge[d].extent (X_AXIS);
124 if (!ext.is_empty ())
126 edge[d].translate_axis (span_points[d], X_AXIS);
127 m.add_stencil (edge[d]);
128 span_points[d] += -d * ext[-d];
131 while (flip (&d) != LEFT);
134 if (!span_points.is_empty ())
136 Stencil l = Line_spanner::line_stencil (me,
137 Offset (span_points[LEFT], 0),
138 Offset (span_points[RIGHT], 0));
141 m.translate_axis (- me->relative_coordinate (common, X_AXIS), X_AXIS);
142 return m.smobbed_copy ();
145 ADD_INTERFACE (Dynamic_text_spanner,
146 "dynamic-text-spanner-interface",
147 "A text spanner for crescendo texts",
148 "bound-padding dash-period dash-fraction edge-text style thickness");