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_POSTBABELPREAMBLE,
  53                 LA_PREBABELPREAMBLE,
  54                 LA_RTL
  55         };
  56
  57         // Keep these sorted alphabetically!
  58         LexerKeyword languageTags[] = {
  59                 { "asbabeloptions",       LA_AS_BABELOPTS },
  60                 { "babelname",            LA_BABELNAME },
  61                 { "encoding",             LA_ENCODING },
  62                 { "end",                  LA_END },
  63                 { "guiname",              LA_GUINAME },
  64                 { "internalencoding",     LA_INTERNAL_ENC },
  65                 { "langcode",             LA_LANG_CODE },
  66                 { "langvariety",          LA_LANG_VARIETY },
  67                 { "postbabelpreamble",    LA_POSTBABELPREAMBLE },
  68                 { "prebabelpreamble",     LA_PREBABELPREAMBLE },
  69                 { "rtl",                  LA_RTL }
  70         };
  71
  72         bool error = false;
  73         bool finished = false;
  74         lex.pushTable(languageTags);
  75         // parse style section
  76         while (!finished && lex.isOK() && !error) {
  77                 int le = lex.lex();
  78                 // See comment in LyXRC.cpp.
  79                 switch (le) {
  80                 case Lexer::LEX_FEOF:
  81                         continue;
  82
  83                 case Lexer::LEX_UNDEF: // parse error
  84                         lex.printError("Unknown language tag `$$Token'");
  85                         error = true;
  86                         continue;
  87
  88                 default:
  89                         break;
  90                 }
  91                 switch (static_cast<LanguageTags>(le)) {
  92                 case LA_END: // end of structure
  93                         finished = true;
  94                         break;
  95                 case LA_AS_BABELOPTS:
  96                         lex >> as_babel_options_;
  97                         break;
  98                 case LA_BABELNAME:
  99                         lex >> babel_;
 100                         break;
 101                 case LA_ENCODING:
 102                         lex >> encodingStr_;
 103                         break;
 104                 case LA_GUINAME:
 105                         lex >> display_;
 106                         break;
 107                 case LA_INTERNAL_ENC:
 108                         lex >> internal_enc_;
 109                         break;
 110                 case LA_LANG_CODE:
 111                         lex >> code_;
 112                         break;
 113                 case LA_LANG_VARIETY:
 114                         lex >> variety_;
 115                         break;
 116                 case LA_POSTBABELPREAMBLE:
 117                         babel_postsettings_ =
 118                                 lex.getLongString("EndPostBabelPreamble");
 119                         break;
 120                 case LA_PREBABELPREAMBLE:
 121                         babel_presettings_ =
 122                                 lex.getLongString("EndPreBabelPreamble");
 123                         break;
 124                 case LA_RTL:
 125                         lex >> rightToLeft_;
 126                         break;
 127                 }
 128         }
 129         lex.popTable();
 130         return finished && !error;
 131 }
 132
 133
 134 bool Language::read(Lexer & lex)
 135 {
 136         as_babel_options_ = 0;
 137         encoding_ = 0;
 138         internal_enc_ = 0;
 139         rightToLeft_ = 0;
 140
 141         if (!lex.next()) {
 142                 lex.printError("No name given for language: `$$Token'.");
 143                 return false;
 144         }
 145
 146         lang_ = lex.getString();
 147         LYXERR(Debug::INFO, "Reading language " << lang_);
 148         if (!readLanguage(lex)) {
 149                 LYXERR0("Error parsing language `" << lang_ << '\'');
 150                 return false;
 151         }
 152
 153         encoding_ = encodings.fromLyXName(encodingStr_);
 154         if (!encoding_ && !encodingStr_.empty()) {
 155                 encoding_ = encodings.fromLyXName("iso8859-1");
 156                 LYXERR0("Unknown encoding " << encodingStr_);
 157         }
 158         return true;
 159 }
 160
 161 void Languages::read(FileName const & filename)
 162 {
 163         Lexer lex;
 164         lex.setFile(filename);
 165         lex.setContext("Languages::read");
 166         while (lex.isOK()) {
 167                 int le = lex.lex();
 168                 switch (le) {
 169                 case Lexer::LEX_FEOF:
 170                         continue;
 171
 172                 default:
 173                         break;
 174                 }
 175                 if (lex.getString() != "Language") {
 176                         lex.printError("Unknown Language tag `$$Token'");
 177                         continue;
 178                 }
 179                 Language l;
 180                 l.read(lex);
 181                 if (!lex)
 182                         break;
 183                 if (l.lang() == "latex")
 184                         latex_lang = l;
 185                 else if (l.lang() == "ignore")
 186                         ignore_lang = l;
 187                 else
 188                         languagelist[l.lang()] = l;
 189         }
 190
 191         default_language = getLanguage(lyxrc.default_language);
 192         if (!default_language) {
 193                 LYXERR0("Default language \"" << lyxrc.default_language
 194                        << "\" not found!");
 195                 default_language = getLanguage("english");
 196                 if (!default_language)
 197                         default_language = &(*languagelist.begin()).second;
 198                 LYXERR0("Using \"" << default_language->lang() << "\" instead!");
 199         }
 200 }
 201
 202
 203 Language const * Languages::getLanguage(string const & language) const
 204 {
 205         if (language == "reset")
 206                 return reset_language;
 207         if (language == "ignore")
 208                 return ignore_language;
 209         const_iterator it = languagelist.find(language);
 210         return it == languagelist.end() ? reset_language : &it->second;
 211 }
 212
 213
 214 } // namespace lyx