2 text-item.cc -- implement Text_item
4 source file of the GNU LilyPond music typesetter
6 (c) 1998--2001 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-interface.hh"
15 #include "staff-symbol-referencer.hh"
16 #include "staff-symbol-referencer.hh"
18 #include "all-font-metrics.hh"
28 HEAD: MARKUP-ITEM | (MARKUP-ITEM+)
30 MARKUP-ITEM: PROPERTY | ABBREV | FONT-STYLE
31 PROPERTY: (key . value)
32 ABBREV: rows lines roman music bold italic named super sub text
37 Text_item::text2molecule (Grob *me, SCM text, SCM alist_chain)
39 if (gh_string_p (text))
40 return string2molecule (me, text, alist_chain);
41 else if (gh_list_p (text))
43 if (!gh_pair_p (gh_car (text)) && gh_string_p (gh_car (text)))
44 return string2molecule (me, gh_car (text), alist_chain);
46 return markup_text2molecule (me, text, alist_chain);
52 Text_item::string2molecule (Grob *me, SCM text, SCM alist_chain)
54 SCM style = ly_assoc_chain (ly_symbol2scm ("font-style"),
56 if (gh_pair_p (style) && gh_symbol_p (gh_cdr (style)))
57 alist_chain = Font_interface::add_style (me, gh_cdr(style), alist_chain);
59 Font_metric *fm = Font_interface::get_font (me, alist_chain);
61 SCM lookup = ly_assoc_chain (ly_symbol2scm ("lookup"), alist_chain);
64 if (gh_pair_p (lookup) && gh_cdr (lookup) ==ly_symbol2scm ("name"))
65 mol = lookup_character (me, fm, text);
67 mol = lookup_text (me, fm, text);
73 Text_item::lookup_character (Grob *, Font_metric*fm, SCM char_name)
75 return fm->find_by_name (ly_scm2string (char_name));
80 Text_item::lookup_text (Grob *me, Font_metric*fm, SCM text)
84 Fixme; should be done differently, move to font-interface?
86 differently -- how/why?
89 SCM magnification = me->get_grob_property ("font-magnification");
91 Font_metric* metric = 0;
92 if (gh_number_p (magnification))
95 Real realmag = pow (1.2, gh_scm2int (magnification));
96 metric = all_fonts_global_p->find_scaled (ly_scm2string (font_name), realmag);
101 SCM magnification = me->get_grob_property ("font-magnification");
103 if (gh_number_p (magnification) && gh_scm2double (magnification) > 1)
104 programming_error ("font-magnification disabled");
108 SCM list = gh_list (ly_symbol2scm ("text"), text, SCM_UNDEFINED);
109 list = fontify_atom (fm, list);
111 return Molecule (fm->text_dimension (ly_scm2string (text)), list);
115 Text_item::markup_text2molecule (Grob *me, SCM markup_text,
118 SCM sheet = me->paper_l ()->style_sheet_;
119 SCM f = gh_cdr (scm_assoc (ly_symbol2scm ("markup-to-properties"), sheet));
121 SCM markup = gh_car (markup_text);
122 SCM text = gh_cdr (markup_text);
125 SCM p = gh_cons (gh_call2 (f, sheet, markup), alist_chain);
127 SCM pp = gh_call2 (f, sheet, markup);
129 scm_write (pp, scm_current_error_port ());
131 SCM p = gh_cons (pp, alist_chain);
134 Real staff_space = Staff_symbol_referencer::staff_space (me);
137 SCM a = ly_assoc_chain (ly_symbol2scm ("align"), p);
138 if (gh_pair_p (a) && gh_number_p (gh_cdr (a)))
139 align = (Axis)gh_scm2int (gh_cdr (a));
141 Real baseline_skip = 0;
142 SCM b = ly_assoc_chain (ly_symbol2scm ("baseline-skip"), p);
143 if (gh_pair_p (b) && gh_number_p (gh_cdr (b)))
144 baseline_skip = gh_scm2double (gh_cdr (b)) * staff_space;
146 Array<Real> kern (2);
147 kern[0] = 0; // zucht
149 SCM k = ly_assoc_chain (ly_symbol2scm ("kern"), p);
150 if (gh_pair_p (k) && gh_number_p (gh_cdr (k)))
151 kern[align] = gh_scm2double (gh_cdr (k)) * staff_space;
154 SCM r = ly_assoc_chain (ly_symbol2scm ("raise"), p);
155 if (gh_pair_p (r) && gh_number_p (gh_cdr (r)))
156 raise = gh_scm2double (gh_cdr (r)) * staff_space;
158 Offset o (0, (align == Y_AXIS ? - kern[align] : 0) + raise);
161 while (gh_pair_p (text))
163 Molecule m = text2molecule (me, gh_car (text), p);
165 if (gh_pair_p (gh_car (text)))
166 m_p = gh_cons (gh_call2 (f, sheet, gh_caar (text)), alist_chain);
167 SCM m_k = ly_assoc_chain (ly_symbol2scm ("kern"), m_p);
168 Real m_kern = kern[align];
169 if (gh_pair_p (m_k) && gh_number_p (gh_cdr (m_k)))
170 m_kern = gh_scm2double (gh_cdr (m_k)) * staff_space;
175 if (align == Y_AXIS && baseline_skip)
176 m_kern += baseline_skip - m.extent (Y_AXIS)[UP];
177 mol.add_at_edge (align, align == X_AXIS ? RIGHT : DOWN, m, m_kern);
179 text = gh_cdr (text);
184 MAKE_SCHEME_CALLBACK (Text_item, brew_molecule, 1);
186 Text_item::brew_molecule (SCM smob)
188 Grob *me = unsmob_grob (smob);
190 SCM text = me->get_grob_property ("text");
192 SCM properties = Font_interface::font_alist_chain (me);
193 Molecule mol = Text_item::text2molecule (me, text, properties);
195 SCM space = me->get_grob_property ("word-space");
196 if (gh_number_p (space))
200 mol.add_at_edge (X_AXIS, RIGHT, m, gh_scm2double (space)
201 * Staff_symbol_referencer::staff_space (me));
203 return mol.smobbed_copy ();