/// <summary>
/// Parse the math ML xml data.
/// </summary>
/// <param name="mathML">The math ML xml data.</param>
/// <returns>The math expression; else null;</returns>
public static string Parse(string mathML)
{
// try parsing the root
XElement root;
string s = null;
try
{
root = XElement.Parse(mathML);
BuildContextOptions buildOptions = new BuildContextOptions();
var m = Parser.Parse(root);
var sb = new StringBuilder();
m.Visit(sb, new BuildContext(buildOptions));
s = sb.ToString();
bool useHacks = true;
if (useHacks)
{
// hack: evil hacks until problems are resolved
s = s.Replace("(*", "(")
.Replace(")Math", ")*Math")
.Replace(")(", ")*(")
.Replace("**", "*");
// hack: even nastier hack here
Regex re = new Regex(@"(\d)(\()");
foreach (Match match in re.Matches(s))
{
string toReplace = match.Value;
string toReplaceWith = match.Groups[1].Value + "*" + match.Groups[2].Value;
s = s.Replace(toReplace, toReplaceWith);
}
}
}
catch { s = null; }
return(s);
}
/// <summary>
/// Initializes a new instance of the <see cref="BuildContext"/> class.
/// </summary>
/// <param name="options">Build options.</param>
internal BuildContext(BuildContextOptions options)
{
Options = options;
}