1 /* 2 This file is part of LilyPond, the GNU music typesetter. 3 4 Copyright (C) 2005--2021 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 auto *const op = LY_ASSERT_SMOB (Output_def, def, 1); 35 LY_ASSERT_TYPE (ly_is_symbol, sym, 2); 36 37 SCM answer = op->lookup_variable (sym); 38 if (SCM_UNBNDP (answer)) 39 { 40 if (SCM_UNBNDP (val)) 41 val = SCM_EOL; 42 43 answer = val; 44 } 45 46 return answer; 47 } 48 49 LY_DEFINE (ly_output_def_scope, "ly:output-def-scope", 50 1, 0, 0, (SCM def), 51 "Return the variable scope inside @var{def}.") 52 { 53 auto *const op = LY_ASSERT_SMOB (Output_def, def, 1); 54 return op->scope_; 55 } 56 57 LY_DEFINE (ly_output_def_parent, "ly:output-def-parent", 58 1, 0, 0, (SCM def), 59 "Return the parent output definition of @var{def}.") 60 { 61 auto *const op = LY_ASSERT_SMOB (Output_def, def, 1); 62 return op->parent_ ? op->parent_->self_scm () : SCM_EOL; 63 } 64 65 LY_DEFINE (ly_output_def_set_variable_x, "ly:output-def-set-variable!", 66 3, 0, 0, (SCM def, SCM sym, SCM val), 67 "Set an output definition @var{def} variable @var{sym} to @var{val}.") 68 { 69 auto *const output_def = LY_ASSERT_SMOB (Output_def, def, 1); 70 LY_ASSERT_TYPE (ly_is_symbol, sym, 2); 71 output_def->set_variable (sym, val); 72 return SCM_UNSPECIFIED; 73 } 74 75 LY_DEFINE (ly_output_def_clone, "ly:output-def-clone", 76 1, 0, 0, (SCM def), 77 "Clone output definition @var{def}.") 78 { 79 auto *const op = LY_ASSERT_SMOB (Output_def, def, 1); 80 81 Output_def *clone = op->clone (); 82 return clone->unprotect (); 83 } 84 85 LY_DEFINE (ly_output_description, "ly:output-description", 86 1, 0, 0, (SCM output_def), 87 "Return the description of translators in @var{output-def}.") 88 { 89 auto *const id = LY_ASSERT_SMOB (Output_def, output_def, 1); 90 91 SCM al = ly_module_2_alist (id->scope_); 92 SCM ell = SCM_EOL; 93 for (SCM s = al; scm_is_pair (s); s = scm_cdr (s)) 94 { 95 Context_def *td = unsmob<Context_def> (scm_cdar (s)); 96 SCM key = scm_caar (s); 97 if (td && scm_is_eq (key, td->get_context_name ())) 98 ell = scm_cons (scm_cons (key, td->to_alist ()), ell); 99 } 100 return ell; 101 } 102 103 LY_DEFINE (ly_output_find_context_def, "ly:output-find-context-def", 104 1, 1, 0, (SCM output_def, SCM context_name), 105 "Return an alist of all context defs (matching @var{context-name}" 106 " if given) in @var{output-def}.") 107 { 108 auto *const id = LY_ASSERT_SMOB (Output_def, output_def, 1); 109 if (!SCM_UNBNDP (context_name)) 110 LY_ASSERT_TYPE (ly_is_symbol, context_name, 2); 111 112 SCM al = ly_module_2_alist (id->scope_); 113 SCM ell = SCM_EOL; 114 for (SCM s = al; scm_is_pair (s); s = scm_cdr (s)) 115 { 116 SCM p = scm_car (s); 117 Context_def *td = unsmob<Context_def> (scm_cdr (p)); 118 if (td && scm_is_eq (scm_car (p), td->get_context_name ()) 119 && (SCM_UNBNDP (context_name) || td->is_alias (context_name))) 120 ell = scm_cons (p, ell); 121 } 122 return ell; 123 } 124 125 const char 126 *const Output_def::type_p_name_ = "ly:output-def?"; 127 128 LY_DEFINE (ly_paper_outputscale, "ly:paper-outputscale", 129 1, 0, 0, (SCM def), 130 "Return the @code{output-scale} for output definition @var{def}.") 131 { 132 auto *const b = LY_ASSERT_SMOB (Output_def, def, 1); 133 return to_scm (output_scale (b)); 134 } 135 136 LY_DEFINE (ly_make_output_def, "ly:make-output-def", 137 0, 0, 0, (), 138 "Make an output definition.") 139 { 140 Output_def *bp = new Output_def; 141 return bp->unprotect (); 142 } 143 144 LY_DEFINE (ly_paper_get_font, "ly:paper-get-font", 145 2, 0, 0, (SCM def, SCM chain), 146 "Find a font metric in output definition @var{def} satisfying" 147 " the font qualifiers in alist chain @var{chain}, and return" 148 " it. (An alist chain is a list of alists, containing grob" 149 " properties.)") 150 { 151 auto *const paper = LY_ASSERT_SMOB (Output_def, def, 1); 152 153 Font_metric *fm = select_font (paper, chain); 154 return fm->self_scm (); 155 } 156 157 LY_DEFINE (ly_paper_get_number, "ly:paper-get-number", 158 2, 0, 0, (SCM def, SCM sym), 159 "Return the value of variable @var{sym} in output definition" 160 " @var{def} as a double.") 161 { 162 auto *const layout = LY_ASSERT_SMOB (Output_def, def, 1); 163 return to_scm (layout->get_dimension (sym)); 164 } 165 166 LY_DEFINE (ly_paper_fonts, "ly:paper-fonts", 167 1, 0, 0, (SCM def), 168 "Return a list containing the fonts from output definition" 169 " @var{def} (e.g., @code{\\paper}).") 170 { 171 auto *const b = LY_ASSERT_SMOB (Output_def, def, 1); 172 173 SCM tab1 = b->lookup_variable (ly_symbol2scm ("scaled-fonts")); 174 SCM tab2 = b->lookup_variable (ly_symbol2scm ("pango-fonts")); 175 176 SCM alist1 = SCM_EOL; 177 if (from_scm<bool> (scm_hash_table_p (tab1))) 178 { 179 alist1 = scm_append (ly_alist_vals (ly_hash2alist (tab1))); 180 181 alist1 = ly_alist_vals (alist1); 182 } 183 184 SCM alist2 = SCM_EOL; 185 if (scm_is_true (scm_hash_table_p (tab2))) 186 { 187 // strip original-fonts/pango-font-descriptions 188 alist2 = scm_append (ly_alist_vals (ly_hash2alist (tab2))); 189 190 // strip size factors 191 alist2 = ly_alist_vals (alist2); 192 } 193 194 SCM alist = scm_append (scm_list_2 (alist1, alist2)); 195 SCM font_list = SCM_EOL; 196 for (SCM s = alist; scm_is_pair (s); s = scm_cdr (s)) 197 { 198 SCM entry = scm_car (s); 199 200 Font_metric *fm = unsmob<Font_metric> (entry); 201 202 if (dynamic_cast<Modified_font_metric *> (fm) 203 || dynamic_cast<Pango_font *> (fm)) 204 font_list = scm_cons (fm->self_scm (), font_list); 205 } 206 207 return font_list; 208 } 209