private Atom AttachScripts(TexFormula formula, string value, ref int position, Atom atom)
{
SkipWhiteSpace(value, ref position);
if (position == value.Length)
{
return(atom);
}
// Check for prime marks.
var primesRowAtom = new RowAtom();
var i = position + 1;
while (i < value.Length)
{
if (value[i] == primeChar)
{
primesRowAtom.Add(SymbolAtom.GetAtom("prime"));
}
else if (!IsWhiteSpace(value[i]))
{
break;
}
position++;
i++;
}
// Attach prime marks as superscript, if any were found.
if (primesRowAtom.Elements.Count > 0)
{
atom = new ScriptsAtom(atom, null, primesRowAtom);
}
TexFormula superscriptFormula = null;
TexFormula subscriptFormula = null;
var ch = value[position];
switch (ch)
{
case superScriptChar:
// Attach superscript.
position++;
superscriptFormula = ReadScript(formula, value, ref position);
SkipWhiteSpace(value, ref position);
if (position < value.Length && value[position] == subScriptChar)
{
// Attach subscript also.
position++;
subscriptFormula = ReadScript(formula, value, ref position);
}
break;
case subScriptChar:
// Add subscript.
position++;
subscriptFormula = ReadScript(formula, value, ref position);
SkipWhiteSpace(value, ref position);
if (position < value.Length && value[position] == superScriptChar)
{
// Attach superscript also.
position++;
superscriptFormula = ReadScript(formula, value, ref position);
}
break;
}
if (superscriptFormula is null && subscriptFormula is null)
{
return(atom);
}
// Check whether to return Big Operator or Scripts.
if (atom.GetRightType() == TexAtomType.BigOperator)
{
return(new BigOperatorAtom(atom, subscriptFormula?.RootAtom,
superscriptFormula?.RootAtom));
}
return(new ScriptsAtom(atom, subscriptFormula?.RootAtom,
superscriptFormula?.RootAtom));
}
public override TexAtomType GetLeftType() => RowAtom.GetLeftType();
public override TexAtomType GetRightType() => RowAtom.GetRightType();
public StyledAtom(Atom atom, Brush backgroundColor, Brush foregroundColor)
{
RowAtom = new RowAtom(atom);
Background = backgroundColor;
Foreground = foregroundColor;
}
