src/LayoutFile.cpp

   1 /**
   2  * \file LayoutFileList.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 "LayoutFile.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/lassert.h"
  22 #include "support/debug.h"
  23 #include "support/FileName.h"
  24 #include "support/filetools.h"
  25 #include "support/gettext.h"
  26
  27 #include <boost/bind.hpp>
  28 #include <boost/regex.hpp>
  29
  30 #include <fstream>
  31
  32 using namespace std;
  33 using namespace lyx::support;
  34
  35 namespace lyx {
  36
  37 using boost::bind;
  38 using boost::regex;
  39 using boost::smatch;
  40
  41 LayoutFile::LayoutFile(string const & fn, string const & cln,
  42                            string const & desc, bool texClassAvail )
  43 {
  44         name_ = fn;
  45         latexname_ = cln;
  46         description_ = desc;
  47         texClassAvail_ = texClassAvail;
  48 }
  49
  50 LayoutFileList::~LayoutFileList()
  51 {
  52         ClassMap::const_iterator it = classmap_.begin();
  53         ClassMap::const_iterator en = classmap_.end();
  54         for (; it != en; ++it) {
  55                 delete it->second;
  56         }
  57 }
  58
  59 LayoutFileList & LayoutFileList::get()
  60 {
  61         static LayoutFileList baseclasslist;
  62         return baseclasslist;
  63 }
  64
  65
  66 bool LayoutFileList::haveClass(string const & classname) const
  67 {
  68         ClassMap::const_iterator it = classmap_.begin();
  69         ClassMap::const_iterator en = classmap_.end();
  70         for (; it != en; ++it) {
  71                 if (it->first == classname)
  72                         return true;
  73         }
  74         return false;
  75 }
  76
  77
  78 LayoutFile const & LayoutFileList::operator[](string const & classname) const
  79 {
  80         LASSERT(haveClass(classname), /**/);
  81         return *classmap_[classname];
  82 }
  83
  84
  85 LayoutFile &
  86         LayoutFileList::operator[](string const & classname)
  87 {
  88         LASSERT(haveClass(classname), /**/);
  89         return *classmap_[classname];
  90 }
  91
  92
  93 // Reads LyX textclass definitions according to textclass config file
  94 bool LayoutFileList::read()
  95 {
  96         Lexer lex;
  97         FileName const real_file = libFileSearch("", "textclass.lst");
  98         LYXERR(Debug::TCLASS, "Reading textclasses from `" << real_file << '\'');
  99
 100         if (real_file.empty()) {
 101                 lyxerr << "LayoutFileList::Read: unable to find "
 102                           "textclass file  `"
 103                        << to_utf8(makeDisplayPath(real_file.absFilename(), 1000))
 104                        << "'. Exiting." << endl;
 105                 return false;
 106                 // This causes LyX to end... Not a desirable behaviour. Lgb
 107                 // What do you propose? That the user gets a file dialog
 108                 // and is allowed to hunt for the file? (Asger)
 109                 // more that we have a layout for minimal.cls statically
 110                 // compiled in... (Lgb)
 111         }
 112
 113         if (!lex.setFile(real_file)) {
 114                 lyxerr << "LayoutFileList::Read: "
 115                         "lyxlex was not able to set file: "
 116                        << real_file << endl;
 117         }
 118
 119         if (!lex.isOK()) {
 120                 lyxerr << "LayoutFileList::Read: unable to open "
 121                           "textclass file  `"
 122                        << to_utf8(makeDisplayPath(real_file.absFilename(), 1000))
 123                        << "'\nCheck your installation. LyX can't continue."
 124                        << endl;
 125                 return false;
 126         }
 127
 128         bool finished = false;
 129         // Parse config-file
 130         LYXERR(Debug::TCLASS, "Starting parsing of textclass.lst");
 131         while (lex.isOK() && !finished) {
 132                 LYXERR(Debug::TCLASS, "\tline by line");
 133                 switch (lex.lex()) {
 134                 case Lexer::LEX_FEOF:
 135                         finished = true;
 136                         break;
 137                 default:
 138                         string const fname = lex.getString();
 139                         LYXERR(Debug::TCLASS, "Fname: " << fname);
 140                         if (lex.next()) {
 141                                 string const clname = lex.getString();
 142                                 LYXERR(Debug::TCLASS, "Clname: " << clname);
 143                                 if (lex.next()) {
 144                                         string const desc = lex.getString();
 145                                         LYXERR(Debug::TCLASS, "Desc: " << desc);
 146                                         if (lex.next()) {
 147                                                 bool avail = lex.getBool();
 148                                                 LYXERR(Debug::TCLASS, "Avail: " << avail);
 149                                                 // This code is run when we have
 150                                                 // fname, clname, desc, and avail
 151                                                 LayoutFile * tmpl = new LayoutFile(fname, clname, desc, avail);
 152                                                 if (lyxerr.debugging(Debug::TCLASS)) {
 153                                                         // only system layout files are loaded here so no
 154                                                         // buffer path is needed.
 155                                                         tmpl->load();
 156                                                 }
 157                                                 classmap_[fname] = tmpl;
 158                                         }
 159                                 }
 160                         }
 161                 }
 162         }
 163         LYXERR(Debug::TCLASS, "End of parsing of textclass.lst");
 164
 165         // lyx will start with an empty classmap_, but only reconfigure is allowed
 166         // in this case. This gives users a second chance to configure lyx if
 167         // initial configuration fails. (c.f. bug 2829)
 168         if (classmap_.empty())
 169                 lyxerr << "LayoutFileList::Read: no textclasses found!"
 170                        << endl;
 171         return true;
 172 }
 173
 174
 175 std::vector<LayoutFileIndex> LayoutFileList::classList() const
 176 {
 177         std::vector<LayoutFileIndex> cl;
 178         ClassMap::const_iterator it = classmap_.begin();
 179         ClassMap::const_iterator en = classmap_.end();
 180         for (; it != en; ++it)
 181                 cl.push_back(it->first);
 182         return cl;
 183 }
 184
 185
 186 void LayoutFileList::reset(LayoutFileIndex const & classname) {
 187         LASSERT(haveClass(classname), /**/);
 188         LayoutFile * tc = classmap_[classname];
 189         LayoutFile * tmpl =
 190                 new LayoutFile(tc->name(), tc->latexname(), tc->description(),
 191                                tc->isTeXClassAvailable());
 192         classmap_[classname] = tmpl;
 193         delete tc;
 194 }
 195
 196
 197 string const LayoutFileList::localPrefix = "LOCAL:";
 198
 199 LayoutFileIndex
 200         LayoutFileList::addLayoutFile(string const & textclass, string const & path,
 201                 Layout_Type type)
 202 {
 203         // FIXME  There is a bug here: 4593
 204         //
 205         // only check for textclass.layout file, .cls can be anywhere in $TEXINPUTS
 206         // NOTE: latex class name is defined in textclass.layout, which can be
 207         // different from textclass
 208         string fullName = addName(path, textclass + ".layout");
 209         string localIndex;
 210
 211         if (type == Local)
 212                 localIndex = localPrefix + fullName;
 213
 214         // if the local file has already been loaded, return it
 215         if (haveClass(localIndex))
 216                 return localIndex;
 217
 218         FileName const layout_file(fullName);
 219         if (layout_file.exists()) {
 220                 LYXERR(Debug::TCLASS, "Adding class " << textclass << " from directory " << path);
 221                 // Read .layout file and get description, real latex classname etc
 222                 //
 223                 // This is a C++ version of function processLayoutFile in configure.py,
 224                 // which uses the following regex
 225                 //     \Declare(LaTeX|DocBook)Class\s*(\[([^,]*)(,.*)*\])*\s*{(.*)}
 226                 ifstream ifs(layout_file.toFilesystemEncoding().c_str());
 227                 static regex const reg("^#\\s*\\\\Declare(LaTeX|DocBook)Class\\s*"
 228                         "(?:\\[([^,]*)(?:,.*)*\\])*\\s*\\{(.*)\\}\\s*");
 229                 string line;
 230                 while (getline(ifs, line)) {
 231                         // look for the \DeclareXXXClass line
 232                         smatch sub;
 233                         if (regex_match(line, sub, reg)) {
 234                                 // returns: whole string, classtype (not used here), class name, description
 235                                 LASSERT(sub.size() == 4, /**/);
 236                                 // now, create a TextClass with description containing path information
 237                                 string className(sub.str(2) == "" ? textclass : sub.str(2));
 238                                 LayoutFile * tmpl =
 239                                         new LayoutFile(textclass, className, localIndex, true);
 240                                 // This textclass is added on request so it will definitely be
 241                                 // used. Load it now because other load() calls may fail if they
 242                                 // are called in a context without buffer path information.
 243                                 tmpl->load(path);
 244                                 classmap_[localIndex] = tmpl;
 245                                 return localIndex;
 246                         }
 247                 }
 248         }
 249         // If .layout is not in local directory, or an invalid layout is found, return null
 250         return string();
 251 }
 252
 253
 254 LayoutFileIndex defaultBaseclass()
 255 {
 256         if (LayoutFileList::get().haveClass("article"))
 257                 return string("article");
 258         if (LayoutFileList::get().empty())
 259                 return string();
 260         return LayoutFileList::get().classList().front();
 261 }
 262
 263
 264
 265 // Reads the style files
 266 bool LyXSetStyle()
 267 {
 268         LYXERR(Debug::TCLASS, "LyXSetStyle: parsing configuration...");
 269
 270         if (!LayoutFileList::get().read()) {
 271                 LYXERR(Debug::TCLASS, "LyXSetStyle: an error occured "
 272                         "during parsing.\n             Exiting.");
 273                 return false;
 274         }
 275
 276         LYXERR(Debug::TCLASS, "LyXSetStyle: configuration parsed.");
 277         return true;
 278 }
 279
 280
 281 } // namespace lyx