lyx_mirror/src/session.C

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/**
* \file session.C
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author Lars Gullik Bjønnes
* \author Bo Peng
*
* Full author contact details are available in file CREDITS.
*/
#include <config.h>
#include "session.h"
#include "debug.h"
#include "support/package.h"
#include "support/filetools.h"
#include <boost/filesystem/operations.hpp>
#include <fstream>
#include <sstream>
#include <algorithm>
#include <iterator>
using lyx::support::addName;
using lyx::support::package;
namespace fs = boost::filesystem;
using std::vector;
using std::getline;
using std::string;
using std::ifstream;
using std::ofstream;
using std::endl;
using std::istringstream;
using std::copy;
using std::find;
using std::ostream_iterator;
namespace lyx{
namespace {
string const sec_lastfiles = "[recent files]";
string const sec_lastfilepos = "[cursor positions]";
string const sec_lastopened = "[last opened files]";
string const sec_bookmarks = "[bookmarks]";
string const sec_session = "[session info]";
int const id_lastfiles = 0;
int const id_lastfilepos = 1;
int const id_lastopened = 2;
int const id_bookmarks = 3;
int const id_session = 4;
} // anon namespace
Session::Session(unsigned int num) :
default_num_last_files(4),
absolute_max_last_files(100),
num_lastfilepos(100)
{
setNumberOfLastFiles(num);
// locate the session file
// note that the session file name 'session' is hard-coded
session_file = addName(package().user_support(), "session");
//
readFile();
}
void Session::setNumberOfLastFiles(unsigned int no)
{
if (0 < no && no <= absolute_max_last_files)
num_lastfiles = no;
else {
lyxerr << "LyX: session: too many last files\n"
<< "\tdefault (=" << default_num_last_files
<< ") used." << endl;
num_lastfiles = default_num_last_files;
}
}
void Session::readFile()
{
// we will not complain if we can't find session_file nor will
// we issue a warning. (Lgb)
ifstream ifs(session_file.c_str());
string tmp;
int section = -1;
// the following is currently not implemented very
// robustly. (Manually editing of the session file may crash lyx)
//
while (getline(ifs, tmp)) {
// Ignore comments, empty line or line stats with ' '
if (tmp == "" || tmp[0] == '#' || tmp[0] == ' ')
continue;
// Determine section id
if (tmp == sec_lastfiles) {
section = id_lastfiles;
} else if (tmp == sec_lastfilepos) {
section = id_lastfilepos;
} else if (tmp == sec_lastopened) {
section = id_lastopened;
} else if (tmp == sec_bookmarks) {
section = id_bookmarks;
} else if (tmp == sec_session) {
section = id_session;
} else if (section == id_lastfiles) {
// read lastfiles
if (!fs::exists(tmp) || lastfiles.size() >= num_lastfiles)
continue;
lastfiles.push_back(tmp);
} else if (section == id_lastfilepos) {
// read lastfilepos
// pos, file\n
lyx::pit_type pit;
lyx::pos_type pos;
string fname;
istringstream itmp(tmp);
itmp >> pit;
itmp.ignore(2); // ignore ", "
itmp >> pos;
itmp.ignore(2); // ignore ", "
itmp >> fname;
if (!fs::exists(fname) || lastfilepos.size() >= num_lastfilepos)
continue;
lastfilepos[fname] = boost::tie(pit, pos);
} else if (section == id_lastopened) {
// read lastopened
// files
if (!fs::exists(tmp))
continue;
lastopened.push_back(tmp);
} else if (section == id_bookmarks) {
// read bookmarks
// bookmarkid, id, pos, file\n
unsigned int num;
unsigned int id;
lyx::pos_type pos;
string fname;
istringstream itmp(tmp);
itmp >> num;
itmp.ignore(2); // ignore ", "
itmp >> id;
itmp.ignore(2); // ignore ", "
itmp >> pos;
itmp.ignore(2); // ignore ", "
itmp >> fname;
// only load valid bookmarks
if (fs::exists(fname))
bookmarks.push_back(boost::tie(num, fname, id, pos));
} else if (section == id_session) {
// Read session info, saved as key/value pairs
// would better yell if pos returns npos
string::size_type pos = tmp.find_first_of(" = ");
string key = tmp.substr(0, pos);
string value = tmp.substr(pos + 3);
sessioninfo[key] = value;
}
}
}
void Session::writeFile() const
{
ofstream ofs(session_file.c_str());
if (ofs) {
ofs << "## Automatically generated lyx session file \n"
<< "## Editing this file manually may cause lyx to crash.\n";
// first section
ofs << '\n' << sec_lastfiles << '\n';
copy(lastfiles.begin(), lastfiles.end(),
ostream_iterator<string>(ofs, "\n"));
// second section
ofs << '\n' << sec_lastfilepos << '\n';
for (FilePosMap::const_iterator file = lastfilepos.begin();
file != lastfilepos.end(); ++file) {
ofs << file->second.get<0>() << ", "
<< file->second.get<1>() << ", "
<< file->first << '\n';
}
// third section
ofs << '\n' << sec_lastopened << '\n';
copy(lastopened.begin(), lastopened.end(),
ostream_iterator<string>(ofs, "\n"));
// fourth section
ofs << '\n' << sec_bookmarks << '\n';
for (BookmarkList::const_iterator bm = bookmarks.begin();
bm != bookmarks.end(); ++bm) {
// save bookmark number, id, pos, fname
ofs << bm->get<0>() << ", "
<< bm->get<2>() << ", "
<< bm->get<3>() << ", "
<< bm->get<1>() << '\n';
}
// fifth section
ofs << '\n' << sec_session << '\n';
for (MiscInfo::const_iterator val = sessioninfo.begin();
val != sessioninfo.end(); ++val) {
ofs << val->first << " = " << val->second << '\n';
}
} else
lyxerr << "LyX: Warning: unable to save Session: "
<< session_file << endl;
}
void Session::addLastFile(string const & file)
{
// If file already exist, delete it and reinsert at front.
LastFiles::iterator it = find(lastfiles.begin(), lastfiles.end(), file);
if (it != lastfiles.end())
lastfiles.erase(it);
lastfiles.push_front(file);
if (lastfiles.size() > num_lastfiles)
lastfiles.pop_back();
}
void Session::saveFilePosition(string const & fname, FilePos pos)
{
lastfilepos[fname] = pos;
}
Session::FilePos Session::loadFilePosition(string const & fname) const
{
FilePosMap::const_iterator entry = lastfilepos.find(fname);
// Has position information, return it.
if (entry != lastfilepos.end())
return entry->second;
// Not found, return the first paragraph
else
return 0;
}
void Session::clearLastOpenedFiles()
{
lastopened.clear();
}
void Session::addLastOpenedFile(string const & file)
{
lastopened.push_back(file);
}
void Session::saveBookmark(Bookmark const & bookmark)
{
bookmarks.push_back(bookmark);
}
void Session::saveSessionInfo(string const & key, string const & value)
{
sessioninfo[key] = value;
}
string const Session::loadSessionInfo(string const & key, bool release)
{
MiscInfo::const_iterator pos = sessioninfo.find(key);
string value;
if (pos != sessioninfo.end())
value = pos->second;
if (release)
sessioninfo.erase(key);
return value;
}
}