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 & LayoutFileList::operator[](string const & classname)
  86 {
  87         LASSERT(haveClass(classname), /**/);
  88         return *classmap_[classname];
  89 }
  90
  91
  92 // Reads LyX textclass definitions according to textclass config file
  93 bool LayoutFileList::read()
  94 {
  95         Lexer lex;
  96         FileName const real_file = libFileSearch("", "textclass.lst");
  97         LYXERR(Debug::TCLASS, "Reading textclasses from `" << real_file << '\'');
  98
  99         if (real_file.empty()) {
 100                 lyxerr << "LayoutFileList::Read: unable to find "
 101                           "textclass file  `"
 102                        << to_utf8(makeDisplayPath(real_file.absFilename(), 1000))
 103                        << "'. Exiting." << endl;
 104                 return false;
 105                 // This causes LyX to end... Not a desirable behaviour. Lgb
 106                 // What do you propose? That the user gets a file dialog
 107                 // and is allowed to hunt for the file? (Asger)
 108                 // more that we have a layout for minimal.cls statically
 109                 // compiled in... (Lgb)
 110         }
 111
 112         if (!lex.setFile(real_file)) {
 113                 lyxerr << "LayoutFileList::Read: "
 114                         "lyxlex was not able to set file: "
 115                        << real_file << endl;
 116         }
 117
 118         if (!lex.isOK()) {
 119                 lyxerr << "LayoutFileList::Read: unable to open "
 120                           "textclass file  `"
 121                        << to_utf8(makeDisplayPath(real_file.absFilename(), 1000))
 122                        << "'\nCheck your installation. LyX can't continue."
 123                        << endl;
 124                 return false;
 125         }
 126
 127         bool finished = false;
 128         // Parse config-file
 129         LYXERR(Debug::TCLASS, "Starting parsing of textclass.lst");
 130         while (lex.isOK() && !finished) {
 131                 LYXERR(Debug::TCLASS, "\tline by line");
 132                 switch (lex.lex()) {
 133                 case Lexer::LEX_FEOF:
 134                         finished = true;
 135                         break;
 136                 default:
 137                         string const fname = lex.getString();
 138                         LYXERR(Debug::TCLASS, "Fname: " << fname);
 139                         if (lex.next()) {
 140                                 string const clname = lex.getString();
 141                                 LYXERR(Debug::TCLASS, "Clname: " << clname);
 142                                 if (lex.next()) {
 143                                         string const desc = lex.getString();
 144                                         LYXERR(Debug::TCLASS, "Desc: " << desc);
 145                                         if (lex.next()) {
 146                                                 bool avail = lex.getBool();
 147                                                 LYXERR(Debug::TCLASS, "Avail: " << avail);
 148                                                 // This code is run when we have
 149                                                 // fname, clname, desc, and avail
 150                                                 LayoutFile * tmpl = new LayoutFile(fname, clname, desc, avail);
 151                                                 if (lyxerr.debugging(Debug::TCLASS)) {
 152                                                         // only system layout files are loaded here so no
 153                                                         // buffer path is needed.
 154                                                         tmpl->load();
 155                                                 }
 156                                                 classmap_[fname] = tmpl;
 157                                         }
 158                                 }
 159                         }
 160                 }
 161         }
 162         LYXERR(Debug::TCLASS, "End of parsing of textclass.lst");
 163
 164         // lyx will start with an empty classmap_, but only reconfigure is allowed
 165         // in this case. This gives users a second chance to configure lyx if
 166         // initial configuration fails. (c.f. bug 2829)
 167         if (classmap_.empty())
 168                 lyxerr << "LayoutFileList::Read: no textclasses found!"
 169                        << endl;
 170         return true;
 171 }
 172
 173
 174 std::vector<LayoutFileIndex> LayoutFileList::classList() const
 175 {
 176         std::vector<LayoutFileIndex> cl;
 177         ClassMap::const_iterator it = classmap_.begin();
 178         ClassMap::const_iterator en = classmap_.end();
 179         for (; it != en; ++it)
 180                 cl.push_back(it->first);
 181         return cl;
 182 }
 183
 184
 185 void LayoutFileList::reset(LayoutFileIndex const & classname) {
 186         LASSERT(haveClass(classname), /**/);
 187         LayoutFile * tc = classmap_[classname];
 188         LayoutFile * tmpl =
 189                 new LayoutFile(tc->name(), tc->latexname(), tc->description(),
 190                                tc->isTeXClassAvailable());
 191         classmap_[classname] = tmpl;
 192         delete tc;
 193 }
 194
 195
 196 LayoutFileIndex LayoutFileList::addEmptyClass(string const & textclass)
 197 {
 198         if (haveClass(textclass))
 199                 return textclass;
 200
 201         FileName const tempLayout = FileName::tempName();
 202         ofstream ofs(tempLayout.toFilesystemEncoding().c_str());
 203         ofs << "# This layout is automatically generated\n"
 204                 "# \\DeclareLaTeXClass{" << textclass << "}\n\n"
 205                 "Format         7\n"
 206                 "Input stdclass.inc\n\n"
 207                 "Columns                1\n"
 208                 "Sides                  1\n"
 209                 "SecNumDepth    2\n"
 210                 "TocDepth               2\n"
 211                 "DefaultStyle   Standard\n\n"
 212                 "Style Standard\n"
 213                 "       Category              MainText\n"
 214                 "       Margin                Static\n"
 215                 "       LatexType             Paragraph\n"
 216                 "       LatexName             dummy\n"
 217                 "       ParIndent             MM\n"
 218                 "       ParSkip               0.4\n"
 219                 "       Align                 Block\n"
 220                 "       AlignPossible         Block, Left, Right, Center\n"
 221                 "       LabelType             No_Label\n"
 222                 "End\n";
 223         ofs.close();
 224
 225         // We do not know if a LaTeX class is available for this document, but setting
 226         // the last parameter to true will suppress a warning message about missing
 227         // tex class.
 228         LayoutFile * tc = new LayoutFile(textclass, textclass, "Unknown text class " + textclass, true);
 229         if (!tc->load(tempLayout.absFilename())) {
 230                 // The only way this happens is because the hardcoded layout file above
 231                 // is wrong.
 232                 LASSERT(false, /**/);
 233         }
 234         classmap_[textclass] = tc;
 235         return textclass;
 236 }
 237
 238
 239 LayoutFileIndex
 240         LayoutFileList::addLocalLayout(string const & textclass, string const & path)
 241 {
 242         // FIXME  There is a bug here: 4593
 243         //
 244         // only check for textclass.layout file, .cls can be anywhere in $TEXINPUTS
 245         // NOTE: latex class name is defined in textclass.layout, which can be
 246         // different from textclass
 247         string fullName = addName(path, textclass + ".layout");
 248
 249         FileName const layout_file(fullName);
 250         if (layout_file.exists()) {
 251                 LYXERR(Debug::TCLASS, "Adding class " << textclass << " from directory " << path);
 252                 // Read .layout file and get description, real latex classname etc
 253                 //
 254                 // This is a C++ version of function processLayoutFile in configure.py,
 255                 // which uses the following regex
 256                 //     \Declare(LaTeX|DocBook)Class\s*(\[([^,]*)(,.*)*\])*\s*{(.*)}
 257                 ifstream ifs(layout_file.toFilesystemEncoding().c_str());
 258                 static regex const reg("^#\\s*\\\\Declare(LaTeX|DocBook)Class\\s*"
 259                         "(?:\\[([^,]*)(?:,.*)*\\])*\\s*\\{(.*)\\}\\s*");
 260                 string line;
 261                 while (getline(ifs, line)) {
 262                         // look for the \DeclareXXXClass line
 263                         smatch sub;
 264                         if (regex_match(line, sub, reg)) {
 265                                 // returns: whole string, classtype (not used here), class name, description
 266                                 LASSERT(sub.size() == 4, /**/);
 267                                 // now, create a TextClass with description containing path information
 268                                 string className(sub.str(2) == "" ? textclass : sub.str(2));
 269                                 LayoutFile * tmpl =
 270                                         new LayoutFile(textclass, className, textclass, true);
 271                                 // This textclass is added on request so it will definitely be
 272                                 // used. Load it now because other load() calls may fail if they
 273                                 // are called in a context without buffer path information.
 274                                 tmpl->load(path);
 275                                 // There will be only one textclass with this name, even if different
 276                                 // layout files are loaded from different directories.
 277                                 if (haveClass(textclass)) {
 278                                         LYXERR0("Existing textclass " << textclass << " is redefined by " << fullName);
 279                                         delete classmap_[textclass];
 280                                 }
 281                                 classmap_[textclass] = tmpl;
 282                                 return textclass;
 283                         }
 284                 }
 285         }
 286         // If .layout is not in local directory, or an invalid layout is found, return null
 287         return string();
 288 }
 289
 290
 291 LayoutFileIndex defaultBaseclass()
 292 {
 293         if (LayoutFileList::get().haveClass("article"))
 294                 return string("article");
 295         if (LayoutFileList::get().empty())
 296                 return string();
 297         return LayoutFileList::get().classList().front();
 298 }
 299
 300
 301
 302 // Reads the style files
 303 bool LyXSetStyle()
 304 {
 305         LYXERR(Debug::TCLASS, "LyXSetStyle: parsing configuration...");
 306
 307         if (!LayoutFileList::get().read()) {
 308                 LYXERR(Debug::TCLASS, "LyXSetStyle: an error occured "
 309                         "during parsing.\n             Exiting.");
 310                 return false;
 311         }
 312
 313         LYXERR(Debug::TCLASS, "LyXSetStyle: configuration parsed.");
 314         return true;
 315 }
 316
 317
 318 } // namespace lyx