src/Language.cpp

   1 /**
   2  * \file Language.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Lars Gullik Bjønnes
   7  * \author Jean-Marc Lasgouttes
   8  * \author Jürgen Spitzmüller
   9  * \author Dekel Tsur
  10  *
  11  * Full author contact details are available in file CREDITS.
  12  */
  13
  14 #include <config.h>
  15
  16 #include "Language.h"
  17
  18 #include "Encoding.h"
  19 #include "Lexer.h"
  20 #include "LyXRC.h"
  21
  22 #include "support/debug.h"
  23 #include "support/FileName.h"
  24 #include "support/lstrings.h"
  25
  26 using namespace std;
  27 using namespace lyx::support;
  28
  29
  30 namespace lyx {
  31
  32 Languages languages;
  33 Language ignore_lang;
  34 Language latex_lang;
  35 Language const * default_language;
  36 Language const * ignore_language = &ignore_lang;
  37 Language const * latex_language = &latex_lang;
  38 Language const * reset_language = 0;
  39
  40
  41 bool Language::readLanguage(Lexer & lex)
  42 {
  43         enum LanguageTags {
  44                 LA_AS_BABELOPTS = 1,
  45                 LA_BABELNAME,
  46                 LA_ENCODING,
  47                 LA_END,
  48                 LA_GUINAME,
  49                 LA_INTERNAL_ENC,
  50                 LA_LANG_CODE,
  51                 LA_LANG_VARIETY,
  52                 LA_POLYGLOSSIANAME,
  53                 LA_POLYGLOSSIAOPTS,
  54                 LA_POSTBABELPREAMBLE,
  55                 LA_PREBABELPREAMBLE,
  56                 LA_RTL
  57         };
  58
  59         // Keep these sorted alphabetically!
  60         LexerKeyword languageTags[] = {
  61                 { "asbabeloptions",       LA_AS_BABELOPTS },
  62                 { "babelname",            LA_BABELNAME },
  63                 { "encoding",             LA_ENCODING },
  64                 { "end",                  LA_END },
  65                 { "guiname",              LA_GUINAME },
  66                 { "internalencoding",     LA_INTERNAL_ENC },
  67                 { "langcode",             LA_LANG_CODE },
  68                 { "langvariety",          LA_LANG_VARIETY },
  69                 { "polyglossianame",      LA_POLYGLOSSIANAME },
  70                 { "polyglossiaopts",      LA_POLYGLOSSIAOPTS },
  71                 { "postbabelpreamble",    LA_POSTBABELPREAMBLE },
  72                 { "prebabelpreamble",     LA_PREBABELPREAMBLE },
  73                 { "rtl",                  LA_RTL }
  74         };
  75
  76         bool error = false;
  77         bool finished = false;
  78         lex.pushTable(languageTags);
  79         // parse style section
  80         while (!finished && lex.isOK() && !error) {
  81                 int le = lex.lex();
  82                 // See comment in LyXRC.cpp.
  83                 switch (le) {
  84                 case Lexer::LEX_FEOF:
  85                         continue;
  86
  87                 case Lexer::LEX_UNDEF: // parse error
  88                         lex.printError("Unknown language tag `$$Token'");
  89                         error = true;
  90                         continue;
  91
  92                 default:
  93                         break;
  94                 }
  95                 switch (static_cast<LanguageTags>(le)) {
  96                 case LA_END: // end of structure
  97                         finished = true;
  98                         break;
  99                 case LA_AS_BABELOPTS:
 100                         lex >> as_babel_options_;
 101                         break;
 102                 case LA_BABELNAME:
 103                         lex >> babel_;
 104                         break;
 105                 case LA_POLYGLOSSIANAME:
 106                         lex >> polyglossia_name_;
 107                         break;
 108                 case LA_POLYGLOSSIAOPTS:
 109                         lex >> polyglossia_opts_;
 110                         break;
 111                 case LA_ENCODING:
 112                         lex >> encodingStr_;
 113                         break;
 114                 case LA_GUINAME:
 115                         lex >> display_;
 116                         break;
 117                 case LA_INTERNAL_ENC:
 118                         lex >> internal_enc_;
 119                         break;
 120                 case LA_LANG_CODE:
 121                         lex >> code_;
 122                         break;
 123                 case LA_LANG_VARIETY:
 124                         lex >> variety_;
 125                         break;
 126                 case LA_POSTBABELPREAMBLE:
 127                         babel_postsettings_ =
 128                                 lex.getLongString("EndPostBabelPreamble");
 129                         break;
 130                 case LA_PREBABELPREAMBLE:
 131                         babel_presettings_ =
 132                                 lex.getLongString("EndPreBabelPreamble");
 133                         break;
 134                 case LA_RTL:
 135                         lex >> rightToLeft_;
 136                         break;
 137                 }
 138         }
 139         lex.popTable();
 140         return finished && !error;
 141 }
 142
 143
 144 bool Language::read(Lexer & lex)
 145 {
 146         as_babel_options_ = 0;
 147         encoding_ = 0;
 148         internal_enc_ = 0;
 149         rightToLeft_ = 0;
 150
 151         if (!lex.next()) {
 152                 lex.printError("No name given for language: `$$Token'.");
 153                 return false;
 154         }
 155
 156         lang_ = lex.getString();
 157         LYXERR(Debug::INFO, "Reading language " << lang_);
 158         if (!readLanguage(lex)) {
 159                 LYXERR0("Error parsing language `" << lang_ << '\'');
 160                 return false;
 161         }
 162
 163         encoding_ = encodings.fromLyXName(encodingStr_);
 164         if (!encoding_ && !encodingStr_.empty()) {
 165                 encoding_ = encodings.fromLyXName("iso8859-1");
 166                 LYXERR0("Unknown encoding " << encodingStr_);
 167         }
 168         return true;
 169 }
 170
 171 void Languages::read(FileName const & filename)
 172 {
 173         Lexer lex;
 174         lex.setFile(filename);
 175         lex.setContext("Languages::read");
 176         while (lex.isOK()) {
 177                 int le = lex.lex();
 178                 switch (le) {
 179                 case Lexer::LEX_FEOF:
 180                         continue;
 181
 182                 default:
 183                         break;
 184                 }
 185                 if (lex.getString() != "Language") {
 186                         lex.printError("Unknown Language tag `$$Token'");
 187                         continue;
 188                 }
 189                 Language l;
 190                 l.read(lex);
 191                 if (!lex)
 192                         break;
 193                 if (l.lang() == "latex")
 194                         latex_lang = l;
 195                 else if (l.lang() == "ignore")
 196                         ignore_lang = l;
 197                 else
 198                         languagelist[l.lang()] = l;
 199         }
 200
 201         default_language = getLanguage(lyxrc.default_language);
 202         if (!default_language) {
 203                 LYXERR0("Default language \"" << lyxrc.default_language
 204                        << "\" not found!");
 205                 default_language = getLanguage("english");
 206                 if (!default_language)
 207                         default_language = &(*languagelist.begin()).second;
 208                 LYXERR0("Using \"" << default_language->lang() << "\" instead!");
 209         }
 210 }
 211
 212
 213 Language const * Languages::getLanguage(string const & language) const
 214 {
 215         if (language == "reset")
 216                 return reset_language;
 217         if (language == "ignore")
 218                 return ignore_language;
 219         const_iterator it = languagelist.find(language);
 220         return it == languagelist.end() ? reset_language : &it->second;
 221 }
 222
 223
 224 } // namespace lyx