lyx_mirror/src/TextClassList.cpp
Bo Peng 4493a50d41 Lyx now starts and asks for reconfigure if no textclass is found (bug 2829)
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/branches/BRANCH_1_5_X@20521 a592a061-630c-0410-9148-cb99ea01b6c8
2007-09-26 19:33:10 +00:00

239 lines
6.7 KiB
C++

/**
* \file TextClassList.cpp
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author Lars Gullik Bjønnes
* \author John Levon
*
* Full author contact details are available in file CREDITS.
*/
#include <config.h>
#include "TextClassList.h"
#include "TextClass.h"
#include "debug.h"
#include "Lexer.h"
#include "support/filetools.h"
#include <boost/bind.hpp>
#include <boost/regex.hpp>
#include <boost/filesystem/operations.hpp>
#include <fstream>
namespace lyx {
namespace fs = boost::filesystem;
using support::FileName;
using support::addName;
using support::libFileSearch;
using support::makeDisplayPath;
using boost::bind;
using boost::regex;
using boost::smatch;
using std::endl;
using std::equal_to;
using std::find_if;
using std::make_pair;
using std::sort;
using std::string;
using std::pair;
using std::ifstream;
// Gets textclass number from name
pair<bool, textclass_type> const
TextClassList::numberOfClass(string const & textclass) const
{
ClassList::const_iterator cit =
find_if(classlist_.begin(), classlist_.end(),
bind(equal_to<string>(),
bind(&TextClass::name, _1),
textclass));
return cit != classlist_.end() ?
make_pair(true, textclass_type(cit - classlist_.begin())) :
make_pair(false, textclass_type(0));
}
// Gets a textclass structure from number
TextClass const &
TextClassList::operator[](textclass_type textclass) const
{
classlist_[textclass].load();
if (textclass < classlist_.size())
return classlist_[textclass];
else
return classlist_[0];
}
// used when sorting the textclass list.
class less_textclass_avail_desc
: public std::binary_function<TextClass, TextClass, int>
{
public:
int operator()(TextClass const & tc1,
TextClass const & tc2) const
{
// Ordering criteria:
// 1. Availability of text class
// 2. Description (lexicographic)
return (tc1.isTeXClassAvailable() && !tc2.isTeXClassAvailable()) ||
(tc1.isTeXClassAvailable() == tc2.isTeXClassAvailable() &&
tc1.description() < tc2.description());
}
};
// Reads LyX textclass definitions according to textclass config file
bool TextClassList::read()
{
Lexer lex(0, 0);
support::FileName const real_file = libFileSearch("", "textclass.lst");
LYXERR(Debug::TCLASS) << "Reading textclasses from `"
<< real_file << '\'' << endl;
if (real_file.empty()) {
lyxerr << "TextClassList::Read: unable to find "
"textclass file `"
<< to_utf8(makeDisplayPath(real_file.absFilename(), 1000))
<< "'. Exiting." << endl;
return false;
// This causes LyX to end... Not a desirable behaviour. Lgb
// What do you propose? That the user gets a file dialog
// and is allowed to hunt for the file? (Asger)
// more that we have a layout for minimal.cls statically
// compiled in... (Lgb)
}
if (!lex.setFile(real_file)) {
lyxerr << "TextClassList::Read: "
"lyxlex was not able to set file: "
<< real_file << endl;
}
if (!lex.isOK()) {
lyxerr << "TextClassList::Read: unable to open "
"textclass file `"
<< to_utf8(makeDisplayPath(real_file.absFilename(), 1000))
<< "'\nCheck your installation. LyX can't continue."
<< endl;
return false;
}
bool finished = false;
// Parse config-file
LYXERR(Debug::TCLASS) << "Starting parsing of textclass.lst" << endl;
while (lex.isOK() && !finished) {
LYXERR(Debug::TCLASS) << "\tline by line" << endl;
switch (lex.lex()) {
case Lexer::LEX_FEOF:
finished = true;
break;
default:
string const fname = lex.getString();
LYXERR(Debug::TCLASS) << "Fname: " << fname << endl;
if (lex.next()) {
string const clname = lex.getString();
LYXERR(Debug::TCLASS) << "Clname: " << clname << endl;
if (lex.next()) {
string const desc = lex.getString();
LYXERR(Debug::TCLASS) << "Desc: " << desc << endl;
if (lex.next()) {
bool avail = lex.getBool();
LYXERR(Debug::TCLASS) << "Avail: " << avail << endl;
// This code is run when we have
// fname, clname, desc, and avail
TextClass tmpl(fname, clname, desc, avail);
if (lyxerr.debugging(Debug::TCLASS)) {
tmpl.load();
}
classlist_.push_back(tmpl);
}
}
}
}
}
LYXERR(Debug::TCLASS) << "End of parsing of textclass.lst" << endl;
// lyx will start with an empty classlist_, but only reconfigure is allowed
// in this case. This gives users a second chance to configure lyx if
// initial configuration fails. (c.f. bug 2829)
if (classlist_.empty())
lyxerr << "TextClassList::Read: no textclasses found!"
<< endl;
else
// Ok everything loaded ok, now sort the list.
sort(classlist_.begin(), classlist_.end(), less_textclass_avail_desc());
return true;
}
std::pair<bool, textclass_type> const
TextClassList::addTextClass(std::string const & textclass, std::string const & path)
{
// only check for textclass.layout file, .cls can be anywhere in $TEXINPUTS
// NOTE: latex class name is defined in textclass.layout, which can be different from textclass
FileName const layout_file(addName(path, textclass + ".layout"));
if (fs::exists(layout_file.toFilesystemEncoding())) {
LYXERR(Debug::TCLASS) << "Adding class " << textclass << " from directory " << path << endl;
// Read .layout file and get description, real latex classname etc
//
// This is a C++ version of function processLayoutFile in configure.py,
// which uses the following regex
// \Declare(LaTeX|DocBook)Class\s*(\[([^,]*)(,.*)*\])*\s*{(.*)}
ifstream ifs(layout_file.toFilesystemEncoding().c_str());
static regex const reg("^#\\s*\\\\Declare(LaTeX|DocBook)Class\\s*"
"(?:\\[([^,]*)(?:,.*)*\\])*\\s*\\{(.*)\\}\\s*");
string line;
while (getline(ifs, line)) {
// look for the \DeclareXXXClass line
smatch sub;
if (regex_match(line, sub, reg)) {
// returns: whole string, classtype (not used here), first option, description
BOOST_ASSERT(sub.size()==4);
// now, add the layout to textclass.
TextClass tmpl(textclass, sub.str(2)==""?textclass:sub.str(2),
sub.str(3) + " <" + path + ">", true);
if (lyxerr.debugging(Debug::TCLASS))
tmpl.load(path);
classlist_.push_back(tmpl);
return make_pair(true, classlist_.size() - 1);
}
}
}
// If .layout is not in local directory, or an invalid layout is found, return false
return make_pair(false, textclass_type(0));
}
// Global variable: textclass table.
TextClassList textclasslist;
// Reads the style files
bool LyXSetStyle()
{
LYXERR(Debug::TCLASS) << "LyXSetStyle: parsing configuration..." << endl;
if (!textclasslist.read()) {
LYXERR(Debug::TCLASS) << "LyXSetStyle: an error occured "
"during parsing.\n Exiting." << endl;
return false;
}
LYXERR(Debug::TCLASS) << "LyXSetStyle: configuration parsed." << endl;
return true;
}
} // namespace lyx