2 text-item.cc -- implement Text_item
4 source file of the GNU LilyPond music typesetter
6 (c) 1998--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
7 Jan Nieuwenhuizen <janneke@gnu.org>
12 #include "text-item.hh"
13 #include "paper-def.hh"
14 #include "font-metric.hh"
15 #include "staff-symbol-referencer.hh"
16 #include "staff-symbol-referencer.hh"
18 #include "all-font-metrics.hh"
23 TEXT : STRING | (MARKUP SENTENCE)
24 MARKUP: PROPERTY | ABBREV
25 SENTENCE: TEXT | SENTENCE TEXT
26 PROPERTY: (key . value)
27 ABBREV: rows lines roman music bold italic named super sub text, or any font-style
33 rewrite routines and syntax to be like
36 | (head-expression* TEXT*)
39 head-expression is a list, containing a tag and a variable number of
40 arguments. If necessary, the number of arguments can be stored in a alist,
52 (tag . (argcount function-to-handle-the-tag ))
57 Text_item::text2molecule (Score_element *me, SCM text, SCM alist_chain)
59 if (gh_string_p (text))
60 return string2molecule (me, text, alist_chain);
61 else if (gh_list_p (text))
63 if (!gh_pair_p (gh_car (text)) && gh_string_p (gh_car (text)))
64 return string2molecule (me, gh_car (text), alist_chain);
66 return markup_sentence2molecule (me, text, alist_chain);
72 ly_assoc_chain (SCM key, SCM achain)
74 if (gh_pair_p (achain))
76 SCM handle = scm_assoc (key, gh_car (achain));
77 if (gh_pair_p (handle))
80 return ly_assoc_chain (key, gh_cdr (achain));
87 Text_item::string2molecule (Score_element *me, SCM text, SCM alist_chain)
89 SCM style = ly_assoc_chain (ly_symbol2scm ("font-style"),
91 if (gh_pair_p (style))
92 style = gh_cdr (style);
94 SCM sheet = me->paper_l ()->style_sheet_;
96 if (gh_symbol_p (style))
98 SCM style_alist = gh_cdr (scm_assoc (ly_symbol2scm ("style-alist"), sheet));
99 SCM entry = scm_assoc (style, style_alist);
100 entry = gh_pair_p (entry) ? gh_cdr (entry) : SCM_EOL;
101 alist_chain = gh_cons (entry, alist_chain);
104 SCM fonts = gh_cdr (scm_assoc (ly_symbol2scm ("fonts"), sheet));
105 SCM proc = gh_cdr (scm_assoc (ly_symbol2scm ("properties-to-font"), sheet));
106 SCM font_name = gh_call2 (proc, fonts, alist_chain);
108 SCM lookup = ly_assoc_chain (ly_symbol2scm ("lookup"), alist_chain);
111 if (gh_pair_p (lookup) && ly_symbol2string (gh_cdr (lookup)) == "name")
112 mol = lookup_character (me, font_name, text);
114 mol = lookup_text (me, font_name, text);
120 Text_item::lookup_character (Score_element *me, SCM font_name, SCM char_name)
122 Adobe_font_metric *afm = all_fonts_global_p->find_afm (ly_scm2string (font_name));
126 warning (_f ("can't find font: `%s'", ly_scm2string (font_name)));
127 warning (_f ("(search path: `%s')", global_path.str ().ch_C()));
128 error (_ ("Aborting"));
130 Font_metric * fm = afm;
132 return fm->find_by_name (ly_scm2string (char_name));
137 Text_item::lookup_text (Score_element *me, SCM font_name, SCM text)
139 SCM magnification = me->get_elt_property ("font-magnification");
140 Font_metric* metric = 0;
141 if (gh_number_p (magnification))
143 Real realmag = pow (1.2, gh_scm2int (magnification));
144 metric = all_fonts_global_p->find_scaled (ly_scm2string (font_name), realmag);
147 metric = all_fonts_global_p->find_font (ly_scm2string (font_name));
149 SCM list = gh_list (ly_symbol2scm ("text"), text, SCM_UNDEFINED);
150 list = fontify_atom (metric, list);
152 return Molecule (metric->text_dimension (ly_scm2string (text)), list);
156 Text_item::markup_sentence2molecule (Score_element *me, SCM markup_sentence,
159 SCM sheet = me->paper_l ()->style_sheet_;
160 SCM f = gh_cdr (scm_assoc (ly_symbol2scm ("markup-to-properties"), sheet));
161 SCM markup = gh_car (markup_sentence);
162 SCM sentence = gh_cdr (markup_sentence);
164 SCM p = gh_cons (gh_call2 (f, sheet, markup), alist_chain);
167 SCM a = ly_assoc_chain (ly_symbol2scm ("align"), p);
168 if (gh_pair_p (a) && gh_number_p (gh_cdr (a)))
169 align = (Axis)gh_scm2int (gh_cdr (a));
171 Real staff_space = Staff_symbol_referencer::staff_space (me);
173 SCM k = ly_assoc_chain (ly_symbol2scm ("kern"), p);
174 if (gh_pair_p (k) && gh_number_p (gh_cdr (k)))
175 kern = gh_scm2double (gh_cdr (k)) * staff_space;
178 SCM r = ly_assoc_chain (ly_symbol2scm ("raise"), p);
179 if (gh_pair_p (r) && gh_number_p (gh_cdr (r)))
180 raise = gh_scm2double (gh_cdr (r)) * staff_space;
182 Offset o (align == X_AXIS ? kern : 0,
183 (align == Y_AXIS ? - kern : 0) + raise);
186 while (gh_pair_p (sentence))
188 Molecule m = text2molecule (me, gh_car (sentence), p);
192 mol.add_at_edge (align, align == X_AXIS ? RIGHT : DOWN, m, 0);
194 sentence = gh_cdr (sentence);
199 MAKE_SCHEME_CALLBACK (Text_item, brew_molecule, 1);
201 Text_item::brew_molecule (SCM smob)
203 Score_element *me = unsmob_element (smob);
205 SCM text = me->get_elt_property ("text");
207 SCM properties = gh_list (me->immutable_property_alist_,
208 me->mutable_property_alist_, SCM_UNDEFINED);
210 Molecule mol = Text_item::text2molecule (me, text, properties);
212 SCM space = me->get_elt_property ("word-space");
213 if (gh_number_p (space))
217 mol.add_at_edge (X_AXIS, RIGHT, m, gh_scm2double (space)
218 * Staff_symbol_referencer::staff_space (me));
220 return mol.create_scheme ();