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annotate libinterp/corefcn/oct-tex-lexer.in.ll @ 17327:fe6518a1d87c

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Move TeX symbol decoding into the lexer (bug #39831). * libinterp/Makefile.am (BUILT_SOURCES): Add corefcn/oct-tex-symbols.cc. (BUILT_DISTFILES): Add corefcn/oct-tex-lexer.ll and corefcn/oct-tex-symbols.cc. (EXTRA_DIST): Add corefcn/oct-tex-lexer.in.ll and corefcn/oct-tex-symbols.in. (ULT_DIST_SRC): Filter out corefcn/oct-tex-lexer.ll from DIST_SRC and add corefcn/oct-tex-lexer.in.ll instead. (CLEAN_FILES): Add corefcn/oct-tex-parser.output. * libinterp/corefcn/modules.mk (corefcn/oct-tex-lexer.ll, corefcn/oct-tex-symbols.cc): New rules to build the TeX lexer. (corefcn/txt-eng.cc): Add dependency on corefcn/oct-tex-symbols.cc. * libinterp/corefcn/oct-tex-lexer.in.ll: Renamed from oct-tex.lexer.ll. Remove COMMAND state. Remove ID regex. Replace rules for symbols with tag @SYMBOL_RULES@. * libinterp/corefcn/oct-tex-parser.yy (ID, CMD, identifier): Remove tokens. (SYM, sym): New token and value. (symbol_element): Build from SYM. * libinterp/corefcn/oct-tex-symbols.in: New file with supported TeX symbols and corresponding codes (unicode and MS symbols). * libinterp/corefcn/txt-eng.h (class text_element_symbol): Make it inherit from text_element. (text_element_symbol::code): Removed member. (text_element_symbol::symbol): New member. (text_element_symbol::text_element_symbol): Adapt constructor. (text_element_symbol::get_symbol): New method. (text_element_symbol::get_symbol_code): Make const. * libinterp/corefcn/txt-eng.cc (symbol_names, symbol_codes): Remove static variables, now auto-generated from oct-tex-symbols.in. (oct-tex-symbols.cc): New include. (text_element_symbol::get_symbol_code): Change implementation to simply index into auto-generated symbol_codes array. * libinterp/corefcn/txt-eng-ft.cc (ft_render::visit(text_element_symbol)): Don't use text_element_symbol::string_value(), use text_element_symbol::get_symbol() instead.
author Michael Goffioul <michael.goffioul@gmail.com>
date Sat, 24 Aug 2013 14:27:09 -0400
parents libinterp/corefcn/oct-tex-lexer.ll@ea23eb07f8ed
children bdbf91c0a1a4
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1 /*
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2
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3 Copyright (C) 2013 Michael Goffioul
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4
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5 This file is part of Octave.
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6
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 %option prefix = "octave_tex_"
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24 %option noyywrap
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25 %option reentrant
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26 %option bison-bridge
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27
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28 %top {
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29 #ifdef HAVE_CONFIG_H
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30 #include <config.h>
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31 #endif
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32
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33 #include "txt-eng.h"
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34 #include "oct-tex-parser.h"
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35 }
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36
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37 %x NUM_MODE
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38 %x MAYBE_NUM_MODE
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39
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40 D [0-9]
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41 NUM (({D}+\.?{D}*)|(\.{D}+))
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42
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43 %%
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44
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45 %{
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46 // Numeric values
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47 %}
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48
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49 <NUM_MODE>{NUM} {
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50 int nread;
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51
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52 nread = sscanf (yytext, "%lf", &(yylval->num));
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53 if (nread == 1)
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54 return NUM;
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55 }
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56 <NUM_MODE>[ \t]+ { }
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57 <NUM_MODE>"\n"|. { yyless (0); BEGIN (INITIAL); }
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58
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59 <MAYBE_NUM_MODE>"{" { BEGIN (NUM_MODE); return START; }
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60 <MAYBE_NUM_MODE>"\n"|. { yyless (0); BEGIN (INITIAL); }
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61
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62 %{
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63 // Simple commands
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64 %}
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65
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66 "\\bf" { return BF; }
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67 "\\it" { return IT; }
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68 "\\sl" { return SL; }
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69 "\\rm" { return RM; }
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70
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71 %{
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72 // Generic font commands
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73 %}
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74
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75 "\\fontname" { return FONTNAME; }
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76 "\\fontsize" { BEGIN (MAYBE_NUM_MODE); return FONTSIZE; }
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77 "\\color[rgb]" { BEGIN (MAYBE_NUM_MODE); return COLOR_RGB; }
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78 "\\color" { return COLOR; }
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79
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80 %{
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81 // Special characters
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82 %}
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83
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84 "{" { return START; }
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85 "}" { return END; }
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86 "^" { return SUPER; }
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87 "_" { return SUB; }
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88
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89 "\\{" |
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90 "\\}" |
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91 "\\^" |
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92 "\\_" |
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93 "\\\\" { yylval->ch = yytext[1]; return CH; }
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94
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95 %{
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96 // Symbols
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97 %}
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98
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99 @SYMBOL_RULES@
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100
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101 %{
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102 // Generic character
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103 %}
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104
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105 "\n" |
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106 . { yylval->ch = yytext[0]; return CH; }
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107
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108 %%
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109
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110 bool
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111 text_parser_tex::init_lexer (const std::string& s)
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112 {
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113 if (! scanner)
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114 octave_tex_lex_init (&scanner);
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115
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116 if (scanner)
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117 {
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118 if (buffer_state)
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119 {
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120 octave_tex__delete_buffer (reinterpret_cast<YY_BUFFER_STATE> (buffer_state),
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121 scanner);
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122 buffer_state = 0;
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123 }
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124
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125 buffer_state = octave_tex__scan_bytes (s.data (), s.length (), scanner);
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126 }
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127
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128 return (scanner && buffer_state);
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129 }
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130
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131 void
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132 text_parser_tex::destroy_lexer (void)
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133 {
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134 if (buffer_state)
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135 {
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136 octave_tex__delete_buffer (reinterpret_cast<YY_BUFFER_STATE> (buffer_state),
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137 scanner);
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138 buffer_state = 0;
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139 }
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140
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141 if (scanner)
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142 {
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143 octave_tex_lex_destroy (scanner);
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144 scanner = 0;
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145 }
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146 }