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 "frontends/alert.h"
  22
  23 #include "support/debug.h"
  24 #include "support/FileName.h"
  25 #include "support/filetools.h"
  26 #include "support/gettext.h"
  27 #include "support/lassert.h"
  28 #include "support/lstrings.h"
  29
  30 #include <boost/bind.hpp>
  31 #include <boost/regex.hpp>
  32
  33 #include <fstream>
  34
  35 using namespace std;
  36 using namespace lyx::support;
  37
  38 namespace lyx {
  39
  40 using boost::bind;
  41 using boost::regex;
  42 using boost::smatch;
  43
  44 LayoutFile::LayoutFile(string const & fn, string const & cln,
  45                            string const & desc, bool texClassAvail )
  46 {
  47         name_ = fn;
  48         latexname_ = cln;
  49         description_ = desc;
  50         texClassAvail_ = texClassAvail;
  51 }
  52
  53 LayoutFileList::~LayoutFileList()
  54 {
  55         ClassMap::const_iterator it = classmap_.begin();
  56         ClassMap::const_iterator en = classmap_.end();
  57         for (; it != en; ++it) {
  58                 delete it->second;
  59         }
  60 }
  61
  62 LayoutFileList & LayoutFileList::get()
  63 {
  64         static LayoutFileList baseclasslist;
  65         return baseclasslist;
  66 }
  67
  68
  69 bool LayoutFileList::haveClass(string const & classname) const
  70 {
  71         ClassMap::const_iterator it = classmap_.begin();
  72         ClassMap::const_iterator en = classmap_.end();
  73         for (; it != en; ++it) {
  74                 if (it->first == classname)
  75                         return true;
  76         }
  77         return false;
  78 }
  79
  80
  81 LayoutFile const & LayoutFileList::operator[](string const & classname) const
  82 {
  83         LASSERT(haveClass(classname), /**/);
  84         return *classmap_[classname];
  85 }
  86
  87
  88 LayoutFile & LayoutFileList::operator[](string const & classname)
  89 {
  90         LASSERT(haveClass(classname), /**/);
  91         return *classmap_[classname];
  92 }
  93
  94
  95 // Reads LyX textclass definitions according to textclass config file
  96 bool LayoutFileList::read()
  97 {
  98         Lexer lex;
  99         FileName const real_file = libFileSearch("", "textclass.lst");
 100         LYXERR(Debug::TCLASS, "Reading textclasses from `" << real_file << '\'');
 101
 102         if (real_file.empty()) {
 103                 lyxerr << "LayoutFileList::Read: unable to find "
 104                           "textclass file  `"
 105                        << to_utf8(makeDisplayPath(real_file.absFilename(), 1000))
 106                        << "'. Exiting." << endl;
 107                 return false;
 108                 // This causes LyX to end... Not a desirable behaviour. Lgb
 109                 // What do you propose? That the user gets a file dialog
 110                 // and is allowed to hunt for the file? (Asger)
 111                 // more that we have a layout for minimal.cls statically
 112                 // compiled in... (Lgb)
 113         }
 114
 115         if (!lex.setFile(real_file)) {
 116                 lyxerr << "LayoutFileList::Read: "
 117                         "lyxlex was not able to set file: "
 118                        << real_file << endl;
 119         }
 120
 121         if (!lex.isOK()) {
 122                 lyxerr << "LayoutFileList::Read: unable to open "
 123                           "textclass file  `"
 124                        << to_utf8(makeDisplayPath(real_file.absFilename(), 1000))
 125                        << "'\nCheck your installation. LyX can't continue."
 126                        << endl;
 127                 return false;
 128         }
 129
 130         bool finished = false;
 131         // Parse config-file
 132         LYXERR(Debug::TCLASS, "Starting parsing of textclass.lst");
 133         while (lex.isOK() && !finished) {
 134                 LYXERR(Debug::TCLASS, "\tline by line");
 135                 switch (lex.lex()) {
 136                 case Lexer::LEX_FEOF:
 137                         finished = true;
 138                         break;
 139                 default:
 140                         string const fname = lex.getString();
 141                         LYXERR(Debug::TCLASS, "Fname: " << fname);
 142                         if (!lex.next())
 143                                 break;
 144                         string const clname = lex.getString();
 145                         LYXERR(Debug::TCLASS, "Clname: " << clname);
 146                         if (!lex.next())
 147                                 break;
 148                         string const desc = lex.getString();
 149                         LYXERR(Debug::TCLASS, "Desc: " << desc);
 150                         if (!lex.next())
 151                                 break;
 152                         bool avail = lex.getBool();
 153                         LYXERR(Debug::TCLASS, "Avail: " << avail);
 154                         // This code is run when we have
 155                         // fname, clname, desc, and avail
 156                         LayoutFile * tmpl = new LayoutFile(fname, clname, desc, avail);
 157                         if (lyxerr.debugging(Debug::TCLASS)) {
 158                                 // only system layout files are loaded here so no
 159                                 // buffer path is needed.
 160                                 tmpl->load();
 161                         }
 162                         classmap_[fname] = tmpl;
 163                 }
 164         }
 165         LYXERR(Debug::TCLASS, "End of parsing of textclass.lst");
 166
 167         // lyx will start with an empty classmap_, but only reconfigure is allowed
 168         // in this case. This gives users a second chance to configure lyx if
 169         // initial configuration fails. (c.f. bug 2829)
 170         if (classmap_.empty())
 171                 lyxerr << "LayoutFileList::Read: no textclasses found!"
 172                        << endl;
 173         return true;
 174 }
 175
 176
 177 std::vector<LayoutFileIndex> LayoutFileList::classList() const
 178 {
 179         std::vector<LayoutFileIndex> cl;
 180         ClassMap::const_iterator it = classmap_.begin();
 181         ClassMap::const_iterator en = classmap_.end();
 182         for (; it != en; ++it)
 183                 cl.push_back(it->first);
 184         return cl;
 185 }
 186
 187
 188 void LayoutFileList::reset(LayoutFileIndex const & classname) {
 189         LASSERT(haveClass(classname), /**/);
 190         LayoutFile * tc = classmap_[classname];
 191         LayoutFile * tmpl =
 192                 new LayoutFile(tc->name(), tc->latexname(), tc->description(),
 193                                tc->isTeXClassAvailable());
 194         classmap_[classname] = tmpl;
 195         delete tc;
 196 }
 197
 198
 199 LayoutFileIndex LayoutFileList::addEmptyClass(string const & textclass)
 200 {
 201         if (haveClass(textclass))
 202                 return textclass;
 203
 204         FileName const tempLayout = FileName::tempName();
 205         ofstream ofs(tempLayout.toFilesystemEncoding().c_str());
 206         ofs << "# This layout is automatically generated\n"
 207                 "# \\DeclareLaTeXClass{" << textclass << "}\n\n"
 208                 "Format         7\n"
 209                 "Input stdclass.inc\n\n"
 210                 "Columns                1\n"
 211                 "Sides                  1\n"
 212                 "SecNumDepth    2\n"
 213                 "TocDepth               2\n"
 214                 "DefaultStyle   Standard\n\n"
 215                 "Style Standard\n"
 216                 "       Category              MainText\n"
 217                 "       Margin                Static\n"
 218                 "       LatexType             Paragraph\n"
 219                 "       LatexName             dummy\n"
 220                 "       ParIndent             MM\n"
 221                 "       ParSkip               0.4\n"
 222                 "       Align                 Block\n"
 223                 "       AlignPossible         Block, Left, Right, Center\n"
 224                 "       LabelType             No_Label\n"
 225                 "End\n";
 226         ofs.close();
 227
 228         // We do not know if a LaTeX class is available for this document, but setting
 229         // the last parameter to true will suppress a warning message about missing
 230         // tex class.
 231         LayoutFile * tc = new LayoutFile(textclass, textclass, "Unknown text class " + textclass, true);
 232         if (!tc->load(tempLayout.absFilename())) {
 233                 // The only way this happens is because the hardcoded layout file above
 234                 // is wrong.
 235                 LASSERT(false, /**/);
 236         }
 237         classmap_[textclass] = tc;
 238         return textclass;
 239 }
 240
 241
 242 LayoutFileIndex
 243         LayoutFileList::addLocalLayout(string const & textclass, string const & path)
 244 {
 245         // FIXME  There is a bug here: 4593
 246         //
 247         // only check for textclass.layout file, .cls can be anywhere in $TEXINPUTS
 248         // NOTE: latex class name is defined in textclass.layout, which can be
 249         // different from textclass
 250         string fullName = addName(path, textclass + ".layout");
 251
 252         FileName const layout_file(fullName);
 253         if (layout_file.exists()) {
 254                 LYXERR(Debug::TCLASS, "Adding class " << textclass << " from directory " << path);
 255                 // Read .layout file and get description, real latex classname etc
 256                 //
 257                 // This is a C++ version of function processLayoutFile in configure.py,
 258                 // which uses the following regex
 259                 //     \Declare(LaTeX|DocBook)Class\s*(\[([^,]*)(,.*)*\])*\s*{(.*)}
 260                 ifstream ifs(layout_file.toFilesystemEncoding().c_str());
 261                 static regex const reg("^#\\s*\\\\Declare(LaTeX|DocBook)Class\\s*"
 262                         "(?:\\[([^,]*)(?:,.*)*\\])*\\s*\\{(.*)\\}\\s*");
 263                 string line;
 264                 while (getline(ifs, line)) {
 265                         // look for the \DeclareXXXClass line
 266                         smatch sub;
 267                         if (regex_match(line, sub, reg)) {
 268                                 // returns: whole string, classtype (not used here), class name, description
 269                                 LASSERT(sub.size() == 4, /**/);
 270                                 // now, create a TextClass with description containing path information
 271                                 string className(sub.str(2) == "" ? textclass : sub.str(2));
 272                                 LayoutFile * tmpl =
 273                                         new LayoutFile(textclass, className, textclass, true);
 274                                 // This textclass is added on request so it will definitely be
 275                                 // used. Load it now because other load() calls may fail if they
 276                                 // are called in a context without buffer path information.
 277                                 tmpl->load(path);
 278                                 // There will be only one textclass with this name, even if different
 279                                 // layout files are loaded from different directories.
 280                                 if (haveClass(textclass)) {
 281                                         LYXERR0("Existing textclass " << textclass << " is redefined by " << fullName);
 282                                         delete classmap_[textclass];
 283                                 }
 284                                 classmap_[textclass] = tmpl;
 285                                 return textclass;
 286                         }
 287                 }
 288         }
 289         // If .layout is not in local directory, or an invalid layout is found, return null
 290         return string();
 291 }
 292
 293
 294 bool LayoutFileList::load(string const & name, string const & buf_path)
 295 {
 296         if (!haveClass(name)) {
 297                 LYXERR0("Document class \"" << name << "\" does not exist.");
 298                 return false;
 299         }
 300
 301         LayoutFile * tc = classmap_[name];
 302         if (!tc->load(buf_path)) {
 303                 docstring s = bformat(_("The document class %1$s "
 304                                    "could not be loaded."), from_utf8(name));
 305                 frontend::Alert::error(_("Could not load class"), s);
 306                 return false;
 307         }
 308         return true;
 309 }
 310
 311
 312 LayoutFileIndex defaultBaseclass()
 313 {
 314         if (LayoutFileList::get().haveClass("article"))
 315                 return string("article");
 316         if (LayoutFileList::get().empty())
 317                 return string();
 318         return LayoutFileList::get().classList().front();
 319 }
 320
 321
 322
 323 // Reads the style files
 324 bool LyXSetStyle()
 325 {
 326         LYXERR(Debug::TCLASS, "LyXSetStyle: parsing configuration...");
 327
 328         if (!LayoutFileList::get().read()) {
 329                 LYXERR(Debug::TCLASS, "LyXSetStyle: an error occured "
 330                         "during parsing.\n             Exiting.");
 331                 return false;
 332         }
 333
 334         LYXERR(Debug::TCLASS, "LyXSetStyle: configuration parsed.");
 335         return true;
 336 }
 337
 338
 339 } // namespace lyx