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 #ifdef __GNUG__
  15 #pragma implementation
  16 #endif
  17
  18 #include "lyxtextclasslist.h"
  19 #include "lyxtextclass.h"
  20 #include "debug.h"
  21 #include "lyxlex.h"
  22 #include "gettext.h"
  23
  24 #include "frontends/Alert.h"
  25
  26 #include "support/lyxfunctional.h"
  27 #include "support/LAssert.h"
  28 #include "support/filetools.h"
  29
  30 #include <utility>
  31
  32 #ifndef CXX_GLOBAL_CSTD
  33 using std::exit;
  34 #endif
  35
  36 using lyx::textclass_type;
  37 using std::pair;
  38 using std::make_pair;
  39 using std::endl;
  40 using std::find_if;
  41 using std::sort;
  42
  43
  44 // Gets textclass number from name
  45 pair<bool, textclass_type> const
  46 LyXTextClassList::NumberOfClass(string const & textclass) const
  47 {
  48         ClassList::const_iterator cit =
  49                 find_if(classlist.begin(), classlist.end(),
  50                         lyx::compare_memfun(&LyXTextClass::name, textclass));
  51         return cit != classlist.end() ?
  52                 make_pair(true, textclass_type(cit - classlist.begin())) :
  53                 make_pair(false, textclass_type(0));
  54 }
  55
  56
  57 // Gets a textclass structure from number
  58 LyXTextClass const &
  59 LyXTextClassList::operator[](textclass_type textclass) const
  60 {
  61         classlist[textclass].load();
  62         if (textclass < classlist.size())
  63                 return classlist[textclass];
  64         else
  65                 return classlist[0];
  66 }
  67
  68
  69 void LyXTextClassList::Add(LyXTextClass const & t)
  70 {
  71         classlist.push_back(t);
  72 }
  73
  74
  75 // used when sorting the textclass list.
  76 class less_textclass_desc {
  77 public:
  78         int operator()(LyXTextClass const & tc1, LyXTextClass const & tc2) {
  79                 return tc1.description() < tc2.description();
  80         }
  81 };
  82
  83
  84 // Reads LyX textclass definitions according to textclass config file
  85 bool LyXTextClassList::Read ()
  86 {
  87         LyXLex lex(0, 0);
  88         string real_file = LibFileSearch("", "textclass.lst");
  89         lyxerr[Debug::TCLASS] << "Reading textclasses from `"
  90                               << real_file << "'" << endl;
  91
  92         if (real_file.empty()) {
  93                 lyxerr << "LyXTextClassList::Read: unable to find "
  94                         "textclass file  `" << MakeDisplayPath(real_file, 1000)
  95                        << "'. Exiting." << endl;
  96
  97                 Alert::alert(_("LyX wasn't able to find its layout descriptions!"),
  98                            _("Check that the file \"textclass.lst\""),
  99                            _("is installed correctly. Sorry, has to exit :-("));
 100                 return false;
 101                 // This causes LyX to end... Not a desirable behaviour. Lgb
 102                 // What do you propose? That the user gets a file dialog
 103                 // and is allowed to hunt for the file? (Asger)
 104                 // more that we have a layout for minimal.cls statically
 105                 // compiled in... (Lgb)
 106         }
 107
 108         if (!lex.setFile(real_file)) {
 109                 lyxerr << "LyXTextClassList::Read: "
 110                         "lyxlex was not able to set file: "
 111                        << real_file << endl;
 112         }
 113
 114         if (!lex.isOK()) {
 115                 lyxerr << "LyXTextClassList::Read: unable to open "
 116                         "textclass file  `" << MakeDisplayPath(real_file, 1000)
 117                        << "'\nCheck your installation. LyX can't continue."
 118                        << endl;
 119                 return false;
 120         }
 121
 122         bool finished = false;
 123         // Parse config-file
 124         lyxerr[Debug::TCLASS] << "Starting parsing of textclass.lst" << endl;
 125         while (lex.isOK() && !finished) {
 126                 lyxerr[Debug::TCLASS] << "\tline by line" << endl;
 127                 switch (lex.lex()) {
 128                 case LyXLex::LEX_FEOF:
 129                         finished = true;
 130                         break;
 131                 default:
 132                         string const fname = lex.getString();
 133                         lyxerr[Debug::TCLASS] << "Fname: " << fname << endl;
 134                         if (lex.next()) {
 135                                 string const clname = lex.getString();
 136                                 lyxerr[Debug::TCLASS] << "Clname: " << clname << endl;
 137                                 if (lex.next()) {
 138                                         string const desc = lex.getString();
 139                                         lyxerr[Debug::TCLASS] << "Desc: " << desc << endl;
 140                                         // This code is run when we have
 141                                         // fname, clname and desc
 142                                         LyXTextClass tmpl(fname, clname, desc);
 143                                         if (lyxerr.debugging(Debug::TCLASS)) {
 144                                                 tmpl.load();
 145                                         }
 146                                         Add(tmpl);
 147                                 }
 148                         }
 149                 }
 150         }
 151         lyxerr[Debug::TCLASS] << "End of parsing of textclass.lst" << endl;
 152
 153         if (classlist.empty()) {
 154                 lyxerr << "LyXTextClassList::Read: no textclasses found!"
 155                        << endl;
 156                 Alert::alert(_("LyX wasn't able to find any layout description!"),
 157                            _("Check the contents of the file \"textclass.lst\""),
 158                            _("Sorry, has to exit :-("));
 159                 return false;
 160         }
 161         // Ok everything loaded ok, now sort the list.
 162         sort(classlist.begin(), classlist.end(), less_textclass_desc());
 163         return true;
 164 }
 165
 166
 167 // Global variable: textclass table.
 168 LyXTextClassList textclasslist;
 169
 170 // Reads the style files
 171 void LyXSetStyle()
 172 {
 173         lyxerr[Debug::TCLASS] << "LyXSetStyle: parsing configuration...\n";
 174
 175         if (!textclasslist.Read()) {
 176                 lyxerr[Debug::TCLASS] << "LyXSetStyle: an error occured "
 177                         "during parsing.\n             Exiting." << endl;
 178                 exit(1);
 179         }
 180
 181         lyxerr[Debug::TCLASS] << "LyXSetStyle: configuration parsed." << endl;
 182 }