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shorten filenames a bit

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git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@4497 a592a061-630c-0410-9148-cb99ea01b6c8
This commit is contained in:
André Pönitz 2002-06-27 13:01:31 +00:00
parent f660211af3
commit 2c1591e410
1 changed files with 27 additions and 10 deletions
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37
src/mathed/formula.C
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@ -460,6 +460,26 @@ void InsetFormula::init()
}
// built some unique filename
string constructFileName(string const & data)
{
typedef std::map<string, int> cache_type;
static cache_type theCache;
static int theCounter = 0;
int number;
cache_type::const_iterator it = theCache.find(data);
if (it == theCache.end())
number = theCache[data] = theCounter++;
else
number = it->second;
ostringstream os;
os << number;
return os.str();
}
void InsetFormula::updatePreview() const
{
// nothing to be done if no preview requested
@ -472,21 +492,16 @@ void InsetFormula::updatePreview() const
WriteStream wi(ls, false, false);
par_->write(wi);
string const data = ls.str();
// built some unique filename
ostringstream os;
os << "preview_";
for (string::const_iterator it = data.begin(); it != data.end(); ++it)
os << char('A' + (*it & 15)) << char('a' + (*it >> 4));
string base = os.str();
string dir = OnlyPath(lyx::tempName());
string file = dir + base + ".lyxpreview";
string const base = constructFileName(data);
string const dir = OnlyPath(lyx::tempName());
string const file = dir + base + ".lyxpreview";
// everything is fine already
if (loader_.filename() == file)
return;
// the real work starts
//lyxerr << "### updatePreview() called for " << file << "\n";
std::ofstream of(file.c_str());
of << "\\batchmode"
<< "\\documentclass{article}"
@ -500,4 +515,6 @@ void InsetFormula::updatePreview() const
// now we are done, start actual loading we will get called back via
// InsetFormula::statusChanged() if this is finished
loader_.reset(file); }
loader_.reset(file);
}