2 output-def-scheme.cc -- implement Output_def bindings
4 source file of the GNU LilyPond music typesetter
6 (c) 2005 Han-Wen Nienhuys <hanwen@xs4all.nl>
10 #include "font-metric.hh"
11 #include "pango-font.hh"
12 #include "modified-font-metric.hh"
13 #include "output-def.hh"
14 #include "ly-module.hh"
15 #include "context-def.hh"
17 LY_DEFINE (ly_layout_lookup, "ly:output-def-lookup",
18 2, 1, 0, (SCM pap, SCM sym, SCM def),
19 "Lookup @var{sym} in @var{pap}. "
20 "Return the value or @var{def} (which defaults to @code{'()}) if undefined.")
22 Output_def *op = unsmob_output_def (pap);
23 SCM_ASSERT_TYPE (op, pap, SCM_ARG1, __FUNCTION__, "Output_def");
24 SCM_ASSERT_TYPE (scm_is_symbol (sym), sym, SCM_ARG2, __FUNCTION__, "symbol");
26 SCM answer = op->lookup_variable (sym);
27 if (answer == SCM_UNDEFINED)
29 if (def == SCM_UNDEFINED)
38 LY_DEFINE (ly_output_def_scope, "ly:output-def-scope",
40 "Get the variable scope inside @var{def}.")
42 Output_def *op = unsmob_output_def (def);
43 SCM_ASSERT_TYPE (op, def, SCM_ARG1, __FUNCTION__, "Output definition");
47 LY_DEFINE (ly_output_def_parent, "ly:output-def-parent",
49 "Get the parent output-def of @var{def}.")
51 Output_def *op = unsmob_output_def (def);
52 SCM_ASSERT_TYPE (op, def, SCM_ARG1, __FUNCTION__, "Output definition");
53 return op->parent_ ? op->parent_->self_scm () : SCM_EOL;
56 LY_DEFINE (ly_output_def_clone, "ly:output-def-clone",
60 Output_def *op = unsmob_output_def (def);
61 SCM_ASSERT_TYPE (op, def, SCM_ARG1, __FUNCTION__, "Output definition");
63 Output_def *clone = op->clone ();
64 return clone->unprotect ();
67 LY_DEFINE (ly_output_description, "ly:output-description",
68 1, 0, 0, (SCM output_def),
69 "Return the description of translators in @var{output-def}.")
71 Output_def *id = unsmob_output_def (output_def);
73 SCM al = ly_module2alist (id->scope_);
76 for (SCM s = al; scm_is_pair (s); s = scm_cdr (s))
78 Context_def * td = unsmob_context_def (scm_cdar (s));
79 SCM key = scm_caar (s);
80 if (td && key == td->get_context_name ())
81 ell = scm_cons (scm_cons (key, td->to_alist ()), ell);
86 LY_DEFINE (ly_layout_def_p, "ly:layout-def?",
88 "Is @var{def} a layout definition?")
90 return ly_bool2scm (unsmob_output_def (def));
93 LY_DEFINE (ly_paper_outputscale, "ly:paper-outputscale",
95 "Get outputscale for BP.")
97 Output_def *b = unsmob_output_def (bp);
98 SCM_ASSERT_TYPE (b, bp, SCM_ARG1, __FUNCTION__, "paper");
99 return scm_make_real (output_scale (b));
102 LY_DEFINE (ly_make_output_def, "ly:make-output-def",
104 "Make a output def.")
106 Output_def *bp = new Output_def ;
107 return bp->unprotect ();
110 LY_DEFINE (ly_paper_get_font, "ly:paper-get-font", 2, 0, 0,
111 (SCM paper_smob, SCM chain),
113 "Return a font metric satisfying the font-qualifiers "
114 "in the alist chain @var{chain}.\n"
115 "(An alist chain is a list of alists, "
116 "containing grob properties).\n")
118 Output_def *paper = unsmob_output_def (paper_smob);
119 SCM_ASSERT_TYPE (paper, paper_smob, SCM_ARG1,
120 __FUNCTION__, "paper definition");
122 Font_metric *fm = select_font (paper, chain);
123 return fm->self_scm ();
126 LY_DEFINE (ly_paper_get_number, "ly:paper-get-number", 2, 0, 0,
127 (SCM layout_smob, SCM name),
128 "Return the layout variable @var{name}.")
130 Output_def *layout = unsmob_output_def (layout_smob);
131 SCM_ASSERT_TYPE (layout, layout_smob, SCM_ARG1,
132 __FUNCTION__, "layout definition");
133 return scm_make_real (layout->get_dimension (name));
136 LY_DEFINE (ly_paper_fonts, "ly:paper-fonts",
139 "Return fonts from the @code{\\paper} block @var{bp}.")
141 Output_def *b = unsmob_output_def (bp);
144 SCM_ASSERT_TYPE (b, bp, SCM_ARG1, __FUNCTION__, "paper");
146 SCM tab1 = b->lookup_variable (ly_symbol2scm ("scaled-fonts"));
147 SCM tab2 = b->lookup_variable (ly_symbol2scm ("pango-fonts"));
149 SCM alist1 = SCM_EOL;
150 if (scm_hash_table_p (tab1) == SCM_BOOL_T)
152 alist1 = scm_append (ly_alist_vals (ly_hash2alist (tab1)));
154 alist1 = ly_alist_vals (alist1);
157 SCM alist2 = SCM_EOL;
158 if (scm_hash_table_p (tab2) == SCM_BOOL_T)
160 // strip original-fonts/pango-font-descriptions
161 alist2 = scm_append (ly_alist_vals (ly_hash2alist (tab2)));
163 // strip size factors
164 alist2 = ly_alist_vals (alist2);
167 SCM alist = scm_append (scm_list_2 (alist1, alist2));
168 SCM font_list = SCM_EOL;
169 for (SCM s = alist; scm_is_pair (s); s = scm_cdr (s))
171 SCM entry = scm_car (s);
173 Font_metric *fm = unsmob_metrics (entry);
175 if (dynamic_cast<Modified_font_metric*> (fm)
176 || dynamic_cast<Pango_font*> (fm))
177 font_list = scm_cons (fm->self_scm (), font_list);