lyx_mirror/src/Thesaurus.cpp

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/**
* \file Thesaurus.cpp
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author John Levon
* \author Jürgen Spitzmüller
*
* Full author contact details are available in file CREDITS.
*/
#include <config.h>
#include "Thesaurus.h"
#include "LyXRC.h"
#include "support/FileNameList.h"
#include "support/Package.h"
#include "support/debug.h"
#include "support/filetools.h"
#include "support/gettext.h"
#include "support/lstrings.h"
#include "support/os.h"
#include "support/mythes/mythes.hxx"
#include "frontends/alert.h"
#include <algorithm>
#include <cstring>
#include <fstream>
using namespace std;
using namespace lyx::support;
using namespace lyx::support::os;
namespace lyx {
namespace {
typedef std::map<docstring, MyThes *> Thesauri;
} // namespace anon
struct Thesaurus::Private
{
~Private()
{
for (Thesauri::iterator it = thes_.begin();
it != thes_.end(); ++it) {
delete it->second;
}
}
///
bool thesaurusAvailable(docstring const & lang) const
{
for (Thesauri::const_iterator it = thes_.begin();
it != thes_.end(); ++it) {
if (it->first == lang)
if (it->second)
return true;
}
return false;
}
///
typedef std::pair<std::string, std::string> ThesFiles;
///
ThesFiles getThesaurus(string const & path, docstring const & lang);
ThesFiles getThesaurus(docstring const & lang);
/// add a thesaurus to the list
bool addThesaurus(docstring const & lang);
/// the thesauri
Thesauri thes_;
/// the location below system/user directory
/// there the data+idx files lookup will happen
const string dataDirectory(void) { return "thes"; }
};
pair<string,string> Thesaurus::Private::getThesaurus(string const & path, docstring const & lang)
{
FileName base(path);
if (!base.isDirectory()) {
return make_pair(string(), string());
}
FileNameList const idx_files = base.dirList("idx");
FileNameList const data_files = base.dirList("dat");
string idx;
string data;
string basename;
LYXERR(Debug::FILES, "thesaurus path: " << path);
for (FileNameList::const_iterator it = idx_files.begin(); it != idx_files.end(); ++it) {
basename = it->onlyFileNameWithoutExt();
if (contains(basename, to_ascii(lang))) {
ifstream ifs(it->absFileName().c_str());
if (ifs) {
// check for appropriate version of index file
string encoding; // first line is encoding
int items = 0; // second line is no. of items
getline(ifs,encoding);
ifs >> items;
if (ifs.fail()) {
LYXERR(Debug::FILES, "ignore irregular thesaurus idx file: " << it->absFileName());
continue;
}
if (encoding.length() == 0 || encoding.find_first_of(',') != string::npos) {
LYXERR(Debug::FILES, "ignore version1 thesaurus idx file: " << it->absFileName());
continue;
}
}
idx = it->absFileName();
LYXERR(Debug::FILES, "selected thesaurus idx file: " << idx);
break;
}
}
if (idx.empty()) {
return make_pair(string(), string());
}
for (support::FileNameList::const_iterator it = data_files.begin(); it != data_files.end(); ++it) {
if (contains(it->onlyFileName(), basename)) {
data = it->absFileName();
LYXERR(Debug::FILES, "selected thesaurus data file: " << data);
break;
}
}
return make_pair(idx, data);
}
pair<string,string> Thesaurus::Private::getThesaurus(docstring const & lang)
{
string const thes_path = external_path(lyxrc.thesaurusdir_path);
pair<string,string> result ;
if (thesaurusAvailable(lang))
return make_pair(string(), string());
if (!thes_path.empty()) {
result = getThesaurus(thes_path, lang);
}
if (result.first.empty() || result.second.empty()) {
string const sys_path = external_path(addName(lyx::support::package().system_support().absFileName(),dataDirectory())) ;
result = getThesaurus(sys_path, lang);
}
if (result.first.empty() || result.second.empty()) {
string const user_path = external_path(addName(lyx::support::package().user_support().absFileName(),dataDirectory())) ;
result = getThesaurus(user_path, lang);
}
return result;
}
bool Thesaurus::Private::addThesaurus(docstring const & lang)
{
if (thesaurusAvailable(lang))
return true;
ThesFiles files = getThesaurus(lang);
string const idx = files.first;
string const data = files.second;
if (idx.empty() || data.empty())
return false;
char const * af = idx.c_str();
char const * df = data.c_str();
thes_[lang] = new MyThes(af, df);
return true;
}
bool Thesaurus::thesaurusAvailable(docstring const & lang) const
{
return d->thesaurusAvailable(lang);
}
bool Thesaurus::thesaurusInstalled(docstring const & lang) const
{
if (thesaurusAvailable(lang))
return true;
pair<string, string> files = d->getThesaurus(lang);
return (!files.first.empty() && !files.second.empty());
}
Thesaurus::Meanings Thesaurus::lookup(docstring const & t, docstring const & lang)
{
Meanings meanings;
MyThes * mythes = 0;
if (!d->addThesaurus(lang))
return meanings;
for (Thesauri::const_iterator it = d->thes_.begin();
it != d->thes_.end(); ++it) {
if (it->first == lang) {
mythes = it->second;
break;
}
}
if (!mythes)
return meanings;
string const encoding = mythes->get_th_encoding();
mentry * pmean;
string const text = to_iconv_encoding(support::lowercase(t), encoding);
int len = strlen(text.c_str());
int count = mythes->Lookup(text.c_str(), len, &pmean);
if (!count)
return meanings;
// don't change value of pmean or count
// they are needed for the CleanUpAfterLookup routine
mentry * pm = pmean;
docstring meaning;
for (int i = 0; i < count; i++) {
vector<docstring> ret;
meaning = from_iconv_encoding(string(pm->defn), encoding);
// remove silly item
if (support::prefixIs(meaning, '-'))
meaning = support::ltrim(meaning, "- ");
for (int j = 0; j < pm->count; j++) {
ret.push_back(from_iconv_encoding(string(pm->psyns[j]), encoding));
}
meanings[meaning] = ret;
++pm;
}
// now clean up all allocated memory
mythes->CleanUpAfterLookup(&pmean, count);
for (Meanings::iterator it = meanings.begin();
it != meanings.end(); ++it)
sort(it->second.begin(), it->second.end());
return meanings;
}
Thesaurus::Thesaurus() : d(new Thesaurus::Private)
{
}
Thesaurus::~Thesaurus()
{
delete d;
}
// Global instance
Thesaurus thesaurus;
} // namespace lyx