Add display method for \bendAfter.
[lilypond/mpolesky.git] / lily / text-interface.cc
blob5984eef71b1e543814cb55d60651c4eb5de82abb
1 /*
2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 1998--2010 Han-Wen Nienhuys <hanwen@xs4all.nl>
5 Jan Nieuwenhuizen <janneke@gnu.org>
7 LilyPond is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
12 LilyPond is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
21 #include "text-interface.hh"
23 #include "config.hh"
24 #include "font-interface.hh"
25 #include "grob.hh"
26 #include "main.hh"
27 #include "misc.hh"
28 #include "modified-font-metric.hh"
29 #include "output-def.hh"
30 #include "pango-font.hh"
31 #include "warn.hh"
33 static void
34 replace_whitespace (string *str)
36 vsize i = 0;
37 vsize n = str->size ();
39 while (i < n)
41 char cur = (*str)[i];
43 // avoid the locale-dependent isspace
44 if (cur == '\n' || cur == '\t' || cur == '\v')
45 (*str)[i] = ' ';
47 vsize char_len = utf8_char_len (cur);
49 i += char_len;
53 MAKE_SCHEME_CALLBACK (Text_interface, interpret_string, 3);
54 SCM
55 Text_interface::interpret_string (SCM layout_smob,
56 SCM props,
57 SCM markup)
59 LY_ASSERT_SMOB (Output_def, layout_smob, 1);
60 LY_ASSERT_TYPE (scm_is_string, markup, 3);
62 string str = ly_scm2string (markup);
63 Output_def *layout = unsmob_output_def (layout_smob);
64 Font_metric *fm = select_encoded_font (layout, props);
66 replace_whitespace (&str);
69 We want to filter strings with a music font that pass through
70 the text interface. Here the font encoding is checked to see
71 if it matches one of the music font encodings. --pmccarty
73 SCM encoding = ly_chain_assoc_get (ly_symbol2scm ("font-encoding"),
74 props,
75 SCM_BOOL_F);
76 SCM music_encodings = ly_lily_module_constant ("all-music-font-encodings");
78 if (scm_memq (encoding, music_encodings) != SCM_BOOL_F)
79 return fm->word_stencil (str, true).smobbed_copy ();
80 else
81 return fm->word_stencil (str, false).smobbed_copy ();
84 MAKE_SCHEME_CALLBACK_WITH_OPTARGS (Text_interface, interpret_markup, 3, 0,
85 "Convert a text markup into a stencil."
86 " Takes three arguments, @var{layout}, @var{props}, and @var{markup}.\n"
87 "\n"
88 "@var{layout} is a @code{\\layout} block; it may be obtained from a grob with"
89 " @code{ly:grob-layout}. @var{props} is an alist chain, i.e. a list of"
90 " alists. This is typically obtained with"
91 " @code{(ly:grob-alist-chain grob (ly:output-def-lookup layout 'text-font-defaults))}."
92 " @var{markup} is the markup text to be processed.");
93 SCM
94 Text_interface::interpret_markup (SCM layout_smob, SCM props, SCM markup)
96 if (scm_is_string (markup))
97 return interpret_string (layout_smob, props, markup);
98 else if (scm_is_pair (markup))
100 SCM func = scm_car (markup);
101 SCM args = scm_cdr (markup);
102 if (!is_markup (markup))
103 programming_error ("markup head has no markup signature");
105 return scm_apply_2 (func, layout_smob, props, args);
107 else
109 programming_error ("Object is not a markup. ");
110 scm_puts ("This object should be a markup: ", scm_current_error_port ());
111 scm_display (markup, scm_current_error_port ());
112 scm_puts ("\n", scm_current_error_port ());
114 Box b;
115 b[X_AXIS].set_empty ();
116 b[Y_AXIS].set_empty ();
118 Stencil s (b, SCM_EOL);
119 return s.smobbed_copy ();
123 MAKE_SCHEME_CALLBACK (Text_interface, print, 1);
125 Text_interface::print (SCM grob)
127 Grob *me = unsmob_grob (grob);
129 SCM t = me->get_property ("text");
130 SCM chain = Font_interface::text_font_alist_chain (me);
131 return interpret_markup (me->layout ()->self_scm (), chain, t);
134 /* Ugh. Duplicated from Scheme. */
135 bool
136 Text_interface::is_markup (SCM x)
138 return (scm_is_string (x)
139 || (scm_is_pair (x)
140 && SCM_BOOL_F
141 != scm_object_property (scm_car (x),
142 ly_symbol2scm ("markup-signature"))));
145 bool
146 Text_interface::is_markup_list (SCM x)
148 SCM music_list_p = ly_lily_module_constant ("markup-list?");
149 return scm_is_true (scm_call_1 (music_list_p, x));
153 ADD_INTERFACE (Text_interface,
154 "A Scheme markup text, see @ruser{Formatting text} and"
155 " @rextend{New markup command definition}.\n"
156 "\n"
157 "There are two important commands:"
158 " @code{ly:text-interface::print}, which is a"
159 " grob callback, and"
160 " @code{ly:text-interface::interpret-markup}.",
162 /* properties */
163 "baseline-skip "
164 "text "
165 "word-space "
166 "text-direction "