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Postprocess the output of Maxima.

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git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@5537 a592a061-630c-0410-9148-cb99ea01b6c8
This commit is contained in:
Dekel Tsur 2002-10-28 21:24:06 +00:00
parent 0ad10a39d0
commit f522618723
1 changed files with 66 additions and 1 deletions
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67
src/mathed/math_extern.C
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@ -889,6 +889,38 @@ namespace {
return ret.second;
}
string::size_type get_matching_brace(string const & str, string::size_type i)
{
int count = 1;
string::size_type n = str.size();
while (i < n) {
i = str.find_first_of("{}", i+1);
if (i == string::npos) return i;
if (str[i] == '{')
++count;
else
--count;
if (count == 0)
return i;
}
return string::npos;
}
string::size_type get_matching_brace_back(string const & str, string::size_type i)
{
int count = 1;
while (i > 0) {
i = str.find_last_of("{}", i-1);
if (i == string::npos) return i;
if (str[i] == '}')
++count;
else
--count;
if (count == 0)
return i;
}
return string::npos;
}
MathArray pipeThroughMaxima(string const &, MathArray const & ar)
{
@ -943,8 +975,41 @@ namespace {
return MathArray();
out = subst(tmp[1],"\\>", "");
lyxerr << "out: '" << out << "'\n";
// Ugly code that tries to make the result prettier
string::size_type i = out.find("\\mathchoice");
while (i != string::npos) {
string::size_type j = get_matching_brace(out, i + 12);
string::size_type k = get_matching_brace(out, j + 1);
k = get_matching_brace(out, k + 1);
k = get_matching_brace(out, k + 1);
string mid = out.substr(i + 13,j - i - 13);
if (mid.find("\\over") != string::npos)
mid = '{' + mid + '}';
out = out.substr(0,i)
+ mid
+ out.substr(k + 1);
//lyxerr << "out: " << out << endl;
i = out.find("\\mathchoice", i);
break;
}
i = out.find("\\over");
while (i != string::npos) {
string::size_type j = get_matching_brace_back(out, i - 1);
if (j == string::npos || j == 0) break;
string::size_type k = get_matching_brace(out, i + 5);
if (k == string::npos || k + 1 == out.size()) break;
out = out.substr(0,j - 1)
+ "\\frac"
+ out.substr(j,i - j)
+ out.substr(i + 5,k - i - 4)
+ out.substr(k + 2);
//lyxerr << "out: " << out << endl;
i = out.find("\\over", i + 4);
}
MathArray res;
mathed_parse_cell(res, out);
return res;