src/lyxtextclasslist.C

   1 /* This file is part of
   2  * ======================================================
   3  *
   4  *           LyX, The Document Processor
   5  *
   6  *          Copyright 1995 Matthias Ettrich
   7  *          Copyright 1995-2001 The LyX Team.
   8  *
   9  * ======================================================
  10  */
  11
  12 #include <config.h>
  13
  14 #include "lyxtextclasslist.h"
  15 #include "lyxtextclass.h"
  16 #include "debug.h"
  17 #include "lyxlex.h"
  18 #include "gettext.h"
  19 #include "frontends/Alert.h"
  20
  21 #include "support/lyxfunctional.h"
  22 #include "support/LAssert.h"
  23 #include "support/filetools.h"
  24
  25 #include <utility>
  26
  27 using namespace lyx::support;
  28
  29 #ifndef CXX_GLOBAL_CSTD
  30 using std::exit;
  31 #endif
  32
  33 using lyx::textclass_type;
  34 using std::pair;
  35 using std::make_pair;
  36 using std::endl;
  37 using std::find_if;
  38 using std::sort;
  39
  40
  41 // Gets textclass number from name
  42 pair<bool, textclass_type> const
  43 LyXTextClassList::NumberOfClass(string const & textclass) const
  44 {
  45         ClassList::const_iterator cit =
  46                 find_if(classlist_.begin(), classlist_.end(),
  47                         lyx::compare_memfun(&LyXTextClass::name, textclass));
  48         return cit != classlist_.end() ?
  49                 make_pair(true, textclass_type(cit - classlist_.begin())) :
  50                 make_pair(false, textclass_type(0));
  51 }
  52
  53
  54 // Gets a textclass structure from number
  55 LyXTextClass const &
  56 LyXTextClassList::operator[](textclass_type textclass) const
  57 {
  58         classlist_[textclass].load();
  59         if (textclass < classlist_.size())
  60                 return classlist_[textclass];
  61         else
  62                 return classlist_[0];
  63 }
  64
  65
  66 // used when sorting the textclass list.
  67 class less_textclass_avail_desc {
  68 public:
  69         int operator()(LyXTextClass const & tc1, LyXTextClass const & tc2) {
  70                 // Ordering criteria:
  71                 //   1. Availability of text class
  72                 //   2. Description (lexicographic)
  73
  74                 return (tc1.isTeXClassAvailable() && !tc2.isTeXClassAvailable()) ||
  75                        (tc1.isTeXClassAvailable() == tc2.isTeXClassAvailable() &&
  76                         tc1.description() < tc2.description());
  77         }
  78 };
  79
  80
  81 // Reads LyX textclass definitions according to textclass config file
  82 bool LyXTextClassList::Read()
  83 {
  84         LyXLex lex(0, 0);
  85         string real_file = LibFileSearch("", "textclass.lst");
  86         lyxerr[Debug::TCLASS] << "Reading textclasses from `"
  87                               << real_file << '\'' << endl;
  88
  89         if (real_file.empty()) {
  90                 lyxerr << "LyXTextClassList::Read: unable to find "
  91                         "textclass file  `" << MakeDisplayPath(real_file, 1000)
  92                        << "'. Exiting." << endl;
  93                 return false;
  94                 // This causes LyX to end... Not a desirable behaviour. Lgb
  95                 // What do you propose? That the user gets a file dialog
  96                 // and is allowed to hunt for the file? (Asger)
  97                 // more that we have a layout for minimal.cls statically
  98                 // compiled in... (Lgb)
  99         }
 100
 101         if (!lex.setFile(real_file)) {
 102                 lyxerr << "LyXTextClassList::Read: "
 103                         "lyxlex was not able to set file: "
 104                        << real_file << endl;
 105         }
 106
 107         if (!lex.isOK()) {
 108                 lyxerr << "LyXTextClassList::Read: unable to open "
 109                         "textclass file  `" << MakeDisplayPath(real_file, 1000)
 110                        << "'\nCheck your installation. LyX can't continue."
 111                        << endl;
 112                 return false;
 113         }
 114
 115         bool finished = false;
 116         // Parse config-file
 117         lyxerr[Debug::TCLASS] << "Starting parsing of textclass.lst" << endl;
 118         while (lex.isOK() && !finished) {
 119                 lyxerr[Debug::TCLASS] << "\tline by line" << endl;
 120                 switch (lex.lex()) {
 121                 case LyXLex::LEX_FEOF:
 122                         finished = true;
 123                         break;
 124                 default:
 125                         string const fname = lex.getString();
 126                         lyxerr[Debug::TCLASS] << "Fname: " << fname << endl;
 127                         if (lex.next()) {
 128                                 string const clname = lex.getString();
 129                                 lyxerr[Debug::TCLASS] << "Clname: " << clname << endl;
 130                                 if (lex.next()) {
 131                                         string const desc = lex.getString();
 132                                         lyxerr[Debug::TCLASS] << "Desc: " << desc << endl;
 133                                         if (lex.next()) {
 134                                                 bool avail = lex.getBool();
 135                                                 lyxerr[Debug::TCLASS] << "Avail: " << avail << endl;
 136                                                 // This code is run when we have
 137                                                 // fname, clname, desc, and avail
 138                                                 LyXTextClass tmpl(fname, clname, desc, avail);
 139                                                 if (lyxerr.debugging(Debug::TCLASS)) {
 140                                                         tmpl.load();
 141                                                 }
 142                                                 classlist_.push_back(tmpl);
 143                                         }
 144                                 }
 145                         }
 146                 }
 147         }
 148         lyxerr[Debug::TCLASS] << "End of parsing of textclass.lst" << endl;
 149
 150         if (classlist_.empty()) {
 151                 lyxerr << "LyXTextClassList::Read: no textclasses found!"
 152                        << endl;
 153                 return false;
 154         }
 155         // Ok everything loaded ok, now sort the list.
 156         sort(classlist_.begin(), classlist_.end(), less_textclass_avail_desc());
 157         return true;
 158 }
 159
 160
 161 // Global variable: textclass table.
 162 LyXTextClassList textclasslist;
 163
 164 // Reads the style files
 165 void LyXSetStyle()
 166 {
 167         lyxerr[Debug::TCLASS] << "LyXSetStyle: parsing configuration...\n";
 168
 169         if (!textclasslist.Read()) {
 170                 lyxerr[Debug::TCLASS] << "LyXSetStyle: an error occured "
 171                         "during parsing.\n             Exiting." << endl;
 172                 exit(1);
 173         }
 174
 175         lyxerr[Debug::TCLASS] << "LyXSetStyle: configuration parsed." << endl;
 176 }