src/BaseClassList.cpp

   1 /**
   2  * \file BaseClassList.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 John Levon
   8  *
   9  * Full author contact details are available in file CREDITS.
  10  */
  11
  12 #include <config.h>
  13
  14 #include "BaseClassList.h"
  15 #include "Counters.h"
  16 #include "Floating.h"
  17 #include "FloatList.h"
  18 #include "Lexer.h"
  19 #include "TextClass.h"
  20
  21 #include "support/debug.h"
  22 #include "support/FileName.h"
  23 #include "support/filetools.h"
  24 #include "support/gettext.h"
  25
  26 #include <boost/bind.hpp>
  27 #include <boost/regex.hpp>
  28
  29 #include <fstream>
  30
  31 using namespace std;
  32 using namespace lyx::support;
  33
  34 namespace lyx {
  35
  36 using boost::bind;
  37 using boost::regex;
  38 using boost::smatch;
  39
  40 LayoutFile::LayoutFile(string const & fn, string const & cln,
  41                            string const & desc, bool texClassAvail )
  42 {
  43         name_ = fn;
  44         latexname_ = cln;
  45         description_ = desc;
  46         texClassAvail_ = texClassAvail;
  47 }
  48
  49
  50 BaseClassList & BaseClassList::get()
  51 {
  52         static BaseClassList baseclasslist;
  53         return baseclasslist;
  54 }
  55
  56
  57 bool BaseClassList::haveClass(string const & classname) const
  58 {
  59         ClassMap::const_iterator it = classmap_.begin();
  60         ClassMap::const_iterator en = classmap_.end();
  61         for (; it != en; ++it) {
  62                 if (it->first == classname)
  63                         return true;
  64         }
  65         return false;
  66 }
  67
  68
  69 LayoutFile const & BaseClassList::operator[](string const & classname) const
  70 {
  71         BOOST_ASSERT(haveClass(classname));
  72         return classmap_[classname];
  73 }
  74
  75
  76 LayoutFile &
  77         BaseClassList::operator[](string const & classname)
  78 {
  79         BOOST_ASSERT(haveClass(classname));
  80         return classmap_[classname];
  81 }
  82
  83
  84 // Reads LyX textclass definitions according to textclass config file
  85 bool BaseClassList::read()
  86 {
  87         Lexer lex(0, 0);
  88         FileName const real_file = libFileSearch("", "textclass.lst");
  89         LYXERR(Debug::TCLASS, "Reading textclasses from `" << real_file << '\'');
  90
  91         if (real_file.empty()) {
  92                 lyxerr << "BaseClassList::Read: unable to find "
  93                           "textclass file  `"
  94                        << to_utf8(makeDisplayPath(real_file.absFilename(), 1000))
  95                        << "'. Exiting." << endl;
  96                 return false;
  97                 // This causes LyX to end... Not a desirable behaviour. Lgb
  98                 // What do you propose? That the user gets a file dialog
  99                 // and is allowed to hunt for the file? (Asger)
 100                 // more that we have a layout for minimal.cls statically
 101                 // compiled in... (Lgb)
 102         }
 103
 104         if (!lex.setFile(real_file)) {
 105                 lyxerr << "BaseClassList::Read: "
 106                         "lyxlex was not able to set file: "
 107                        << real_file << endl;
 108         }
 109
 110         if (!lex.isOK()) {
 111                 lyxerr << "BaseClassList::Read: unable to open "
 112                           "textclass file  `"
 113                        << to_utf8(makeDisplayPath(real_file.absFilename(), 1000))
 114                        << "'\nCheck your installation. LyX can't continue."
 115                        << endl;
 116                 return false;
 117         }
 118
 119         bool finished = false;
 120         // Parse config-file
 121         LYXERR(Debug::TCLASS, "Starting parsing of textclass.lst");
 122         while (lex.isOK() && !finished) {
 123                 LYXERR(Debug::TCLASS, "\tline by line");
 124                 switch (lex.lex()) {
 125                 case Lexer::LEX_FEOF:
 126                         finished = true;
 127                         break;
 128                 default:
 129                         string const fname = lex.getString();
 130                         LYXERR(Debug::TCLASS, "Fname: " << fname);
 131                         if (lex.next()) {
 132                                 string const clname = lex.getString();
 133                                 LYXERR(Debug::TCLASS, "Clname: " << clname);
 134                                 if (lex.next()) {
 135                                         string const desc = lex.getString();
 136                                         LYXERR(Debug::TCLASS, "Desc: " << desc);
 137                                         if (lex.next()) {
 138                                                 bool avail = lex.getBool();
 139                                                 LYXERR(Debug::TCLASS, "Avail: " << avail);
 140                                                 // This code is run when we have
 141                                                 // fname, clname, desc, and avail
 142                                                 LayoutFile tmpl(fname, clname, desc, avail);
 143                                                 if (lyxerr.debugging(Debug::TCLASS)) {
 144                                                         // only system layout files are loaded here so no
 145                                                         // buffer path is needed.
 146                                                         tmpl.load();
 147                                                 }
 148                                                 classmap_[fname] = tmpl;
 149                                         }
 150                                 }
 151                         }
 152                 }
 153         }
 154         LYXERR(Debug::TCLASS, "End of parsing of textclass.lst");
 155
 156         // lyx will start with an empty classmap_, but only reconfigure is allowed
 157         // in this case. This gives users a second chance to configure lyx if
 158         // initial configuration fails. (c.f. bug 2829)
 159         if (classmap_.empty())
 160                 lyxerr << "BaseClassList::Read: no textclasses found!"
 161                        << endl;
 162         return true;
 163 }
 164
 165
 166 std::vector<LayoutFileIndex> BaseClassList::classList() const
 167 {
 168         std::vector<LayoutFileIndex> cl;
 169         ClassMap::const_iterator it = classmap_.begin();
 170         ClassMap::const_iterator en = classmap_.end();
 171         for (; it != en; ++it)
 172                 cl.push_back(it->first);
 173         return cl;
 174 }
 175
 176
 177 void BaseClassList::reset(LayoutFileIndex const & classname) {
 178         BOOST_ASSERT(haveClass(classname));
 179         LayoutFile const & tc = classmap_[classname];
 180         LayoutFile tmpl(tc.name(), tc.latexname(), tc.description(),
 181                        tc.isTeXClassAvailable());
 182         classmap_[classname] = tmpl;
 183 }
 184
 185
 186 string const BaseClassList::localPrefix = "LOCAL:";
 187
 188
 189 LayoutFileIndex
 190         BaseClassList::addLayoutFile(string const & textclass, string const & path)
 191 {
 192         // FIXME BUGS
 193         // There be bugs here. The way this presently works, the local class gets
 194         // added to the global list of available document classes. It will then
 195         // appear on the list in Document>Settings, where it could be chosen in,
 196         // say, a new document, with no real warning that the class may not be
 197         // available when the document is saved, since the new document may not be
 198         // in the same directory as the layout file.
 199         //
 200         // Another bug is this: If the Document>Settings dialog is open when a file
 201         // with a local layout is opened, the dialog doesn't update.
 202         //
 203         // only check for textclass.layout file, .cls can be anywhere in $TEXINPUTS
 204         // NOTE: latex class name is defined in textclass.layout, which can be
 205         // different from textclass
 206         string fullName = addName(path, textclass + ".layout");
 207         string localIndex = localPrefix + textclass;
 208
 209         // if the local file has already been loaded, return it
 210         if (haveClass(localIndex))
 211                 return localIndex;
 212
 213         FileName const layout_file(fullName);
 214         if (layout_file.exists()) {
 215                 LYXERR(Debug::TCLASS, "Adding class " << textclass << " from directory " << path);
 216                 // Read .layout file and get description, real latex classname etc
 217                 //
 218                 // This is a C++ version of function processLayoutFile in configure.py,
 219                 // which uses the following regex
 220                 //     \Declare(LaTeX|DocBook)Class\s*(\[([^,]*)(,.*)*\])*\s*{(.*)}
 221                 ifstream ifs(layout_file.toFilesystemEncoding().c_str());
 222                 static regex const reg("^#\\s*\\\\Declare(LaTeX|DocBook)Class\\s*"
 223                         "(?:\\[([^,]*)(?:,.*)*\\])*\\s*\\{(.*)\\}\\s*");
 224                 string line;
 225                 while (getline(ifs, line)) {
 226                         // look for the \DeclareXXXClass line
 227                         smatch sub;
 228                         if (regex_match(line, sub, reg)) {
 229                                 // returns: whole string, classtype (not used here), class name, description
 230                                 BOOST_ASSERT(sub.size() == 4);
 231                                 // now, create a TextClass with description containing path information
 232                                 LayoutFile tmpl(textclass, sub.str(2) == "" ? textclass : sub.str(2),
 233                                         sub.str(3) + " <" + path + ">", true);
 234                                 // Do not add this local TextClass to classmap_ if it has
 235                                 // already been loaded by, for example, a master buffer.
 236                                 if (haveClass(textclass)
 237                                                 // FIXME I don't understand this comment (rgh)
 238                                                 // only layouts from the same directory are considered to be identical.
 239                                                 && classmap_[textclass].description() == tmpl.description()
 240                                    )
 241                                         return textclass;
 242                                 classmap_[localIndex] = tmpl;
 243                                 // This textclass is added on request so it will definitely be
 244                                 // used. Load it now because other load() calls may fail if they
 245                                 // are called in a context without buffer path information.
 246                                 classmap_[localIndex].load(path);
 247                                 return localIndex;
 248                         }
 249                 }
 250         }
 251         // If .layout is not in local directory, or an invalid layout is found, return null
 252         return string("");
 253 }
 254
 255
 256 LayoutFileIndex defaultBaseclass()
 257 {
 258         if (BaseClassList::get().haveClass("article"))
 259                 return string("article");
 260         else
 261                 return string("");
 262 }
 263
 264
 265
 266 // Reads the style files
 267 bool LyXSetStyle()
 268 {
 269         LYXERR(Debug::TCLASS, "LyXSetStyle: parsing configuration...");
 270
 271         if (!BaseClassList::get().read()) {
 272                 LYXERR(Debug::TCLASS, "LyXSetStyle: an error occured "
 273                         "during parsing.\n             Exiting.");
 274                 return false;
 275         }
 276
 277         LYXERR(Debug::TCLASS, "LyXSetStyle: configuration parsed.");
 278         return true;
 279 }
 280
 281
 282 } // namespace lyx