1 /* 2 This file is part of LilyPond, the GNU music typesetter. 3 4 Copyright (C) 2005--2020 Han-Wen Nienhuys <hanwen@xs4all.nl> 5 6 LilyPond is free software: you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation, either version 3 of the License, or 9 (at your option) any later version. 10 11 LilyPond is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with LilyPond. If not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #include "output-def.hh" 21 22 #include "pango-font.hh" 23 #include "modified-font-metric.hh" 24 #include "ly-module.hh" 25 #include "context-def.hh" 26 #include "lily-parser.hh" 27 28 LY_DEFINE (ly_output_def_lookup, "ly:output-def-lookup", 29 2, 1, 0, (SCM def, SCM sym, SCM val), 30 "Return the value of @var{sym} in output definition @var{def}" 31 " (e.g., @code{\\paper}). If no value is found, return" 32 " @var{val} or @code{'()} if @var{val} is undefined.") 33 { 34 LY_ASSERT_SMOB (Output_def, def, 1); 35 Output_def *op = unsmob<Output_def> (def); 36 LY_ASSERT_TYPE (ly_is_symbol, sym, 2); 37 38 SCM answer = op->lookup_variable (sym); 39 if (SCM_UNBNDP (answer)) 40 { 41 if (SCM_UNBNDP (val)) 42 val = SCM_EOL; 43 44 answer = val; 45 } 46 47 return answer; 48 } 49 50 LY_DEFINE (ly_output_def_scope, "ly:output-def-scope", 51 1, 0, 0, (SCM def), 52 "Return the variable scope inside @var{def}.") 53 { 54 LY_ASSERT_SMOB (Output_def, def, 1); 55 Output_def *op = unsmob<Output_def> (def); 56 return op->scope_; 57 } 58 59 LY_DEFINE (ly_output_def_parent, "ly:output-def-parent", 60 1, 0, 0, (SCM def), 61 "Return the parent output definition of @var{def}.") 62 { 63 LY_ASSERT_SMOB (Output_def, def, 1); 64 Output_def *op = unsmob<Output_def> (def); 65 return op->parent_ ? op->parent_->self_scm () : SCM_EOL; 66 } 67 68 LY_DEFINE (ly_output_def_set_variable_x, "ly:output-def-set-variable!", 69 3, 0, 0, (SCM def, SCM sym, SCM val), 70 "Set an output definition @var{def} variable @var{sym} to @var{val}.") 71 { 72 LY_ASSERT_SMOB (Output_def, def, 1); 73 Output_def *output_def = unsmob<Output_def> (def); 74 LY_ASSERT_TYPE (ly_is_symbol, sym, 2); 75 output_def->set_variable (sym, val); 76 return SCM_UNSPECIFIED; 77 } 78 79 LY_DEFINE (ly_output_def_clone, "ly:output-def-clone", 80 1, 0, 0, (SCM def), 81 "Clone output definition @var{def}.") 82 { 83 LY_ASSERT_SMOB (Output_def, def, 1); 84 Output_def *op = unsmob<Output_def> (def); 85 86 Output_def *clone = op->clone (); 87 return clone->unprotect (); 88 } 89 90 LY_DEFINE (ly_output_description, "ly:output-description", 91 1, 0, 0, (SCM output_def), 92 "Return the description of translators in @var{output-def}.") 93 { 94 LY_ASSERT_SMOB (Output_def, output_def, 1); 95 96 Output_def *id = unsmob<Output_def> (output_def); 97 98 SCM al = ly_module_2_alist (id->scope_); 99 SCM ell = SCM_EOL; 100 for (SCM s = al; scm_is_pair (s); s = scm_cdr (s)) 101 { 102 Context_def *td = unsmob<Context_def> (scm_cdar (s)); 103 SCM key = scm_caar (s); 104 if (td && scm_is_eq (key, td->get_context_name ())) 105 ell = scm_cons (scm_cons (key, td->to_alist ()), ell); 106 } 107 return ell; 108 } 109 110 LY_DEFINE (ly_output_find_context_def, "ly:output-find-context-def", 111 1, 1, 0, (SCM output_def, SCM context_name), 112 "Return an alist of all context defs (matching @var{context-name}" 113 " if given) in @var{output-def}.") 114 { 115 LY_ASSERT_SMOB (Output_def, output_def, 1); 116 if (!SCM_UNBNDP (context_name)) 117 LY_ASSERT_TYPE (ly_is_symbol, context_name, 2); 118 119 Output_def *id = unsmob<Output_def> (output_def); 120 121 SCM al = ly_module_2_alist (id->scope_); 122 SCM ell = SCM_EOL; 123 for (SCM s = al; scm_is_pair (s); s = scm_cdr (s)) 124 { 125 SCM p = scm_car (s); 126 Context_def *td = unsmob<Context_def> (scm_cdr (p)); 127 if (td && scm_is_eq (scm_car (p), td->get_context_name ()) 128 && (SCM_UNBNDP (context_name) || td->is_alias (context_name))) 129 ell = scm_cons (p, ell); 130 } 131 return ell; 132 } 133 134 const char 135 *const Output_def::type_p_name_ = "ly:output-def?"; 136 137 LY_DEFINE (ly_paper_outputscale, "ly:paper-outputscale", 138 1, 0, 0, (SCM def), 139 "Return the output-scale for output definition @var{def}.") 140 { 141 LY_ASSERT_SMOB (Output_def, def, 1); 142 Output_def *b = unsmob<Output_def> (def); 143 return to_scm (output_scale (b)); 144 } 145 146 LY_DEFINE (ly_make_output_def, "ly:make-output-def", 147 0, 0, 0, (), 148 "Make an output definition.") 149 { 150 Output_def *bp = new Output_def; 151 return bp->unprotect (); 152 } 153 154 LY_DEFINE (ly_paper_get_font, "ly:paper-get-font", 155 2, 0, 0, (SCM def, SCM chain), 156 "Find a font metric in output definition @var{def} satisfying" 157 " the font-qualifiers in alist chain @var{chain}, and return" 158 " it. (An alist chain is a list of alists, containing grob" 159 " properties.)") 160 { 161 LY_ASSERT_SMOB (Output_def, def, 1); 162 163 Output_def *paper = unsmob<Output_def> (def); 164 Font_metric *fm = select_font (paper, chain); 165 return fm->self_scm (); 166 } 167 168 LY_DEFINE (ly_paper_get_number, "ly:paper-get-number", 169 2, 0, 0, (SCM def, SCM sym), 170 "Return the value of variable @var{sym} in output definition" 171 " @var{def} as a double.") 172 { 173 LY_ASSERT_SMOB (Output_def, def, 1); 174 Output_def *layout = unsmob<Output_def> (def); 175 return to_scm (layout->get_dimension (sym)); 176 } 177 178 LY_DEFINE (ly_paper_fonts, "ly:paper-fonts", 179 1, 0, 0, (SCM def), 180 "Return a list containing the fonts from output definition" 181 " @var{def} (e.g., @code{\\paper}).") 182 { 183 LY_ASSERT_SMOB (Output_def, def, 1); 184 Output_def *b = unsmob<Output_def> (def); 185 186 SCM tab1 = b->lookup_variable (ly_symbol2scm ("scaled-fonts")); 187 SCM tab2 = b->lookup_variable (ly_symbol2scm ("pango-fonts")); 188 189 SCM alist1 = SCM_EOL; 190 if (from_scm<bool> (scm_hash_table_p (tab1))) 191 { 192 alist1 = scm_append (ly_alist_vals (ly_hash2alist (tab1))); 193 194 alist1 = ly_alist_vals (alist1); 195 } 196 197 SCM alist2 = SCM_EOL; 198 if (scm_is_true (scm_hash_table_p (tab2))) 199 { 200 // strip original-fonts/pango-font-descriptions 201 alist2 = scm_append (ly_alist_vals (ly_hash2alist (tab2))); 202 203 // strip size factors 204 alist2 = ly_alist_vals (alist2); 205 } 206 207 SCM alist = scm_append (scm_list_2 (alist1, alist2)); 208 SCM font_list = SCM_EOL; 209 for (SCM s = alist; scm_is_pair (s); s = scm_cdr (s)) 210 { 211 SCM entry = scm_car (s); 212 213 Font_metric *fm = unsmob<Font_metric> (entry); 214 215 if (dynamic_cast<Modified_font_metric *> (fm) 216 || dynamic_cast<Pango_font *> (fm)) 217 font_list = scm_cons (fm->self_scm (), font_list); 218 } 219 220 return font_list; 221 } 222