public void ForAsciiHandlesAllInputs()
{
for (sbyte i = -36 + 1; i != -36; i++) // Break loop at arbitrary negative value (-36)
{
switch (i)
{
case var _ when i < 0:
Assert.Throws <System.ArgumentOutOfRangeException>(
() => LaTeXSettings.ForAscii(i)
);
break;
case var _ when i <= ' ':
case (sbyte)'\u007F':
case (sbyte)'$':
case (sbyte)'%':
case (sbyte)'#':
case (sbyte)'&':
case (sbyte)'~':
case (sbyte)'\'':
case (sbyte)'^':
case (sbyte)'_':
case (sbyte)'{':
case (sbyte)'}':
case (sbyte)'\\':
Assert.Null(LaTeXSettings.ForAscii(i));
break;
default:
Assert.NotNull(LaTeXSettings.ForAscii(i));
break;
}
}
}
public void CommandForAtomIgnoresInnerLists()
{
var atom = new Atoms.Accent("\u0308", new MathList(new Atoms.Number("1")));
atom.Superscript.Add(new Atoms.Number("4"));
atom.Subscript.Add(new Atoms.Variable("x"));
Assert.Equal("ddot", LaTeXSettings.CommandForAtom(atom));
}
public void AtomForCommandGeneratesACopy()
{
var atom = LaTeXSettings.AtomForCommand("int");
if (atom == null)
{
throw new Xunit.Sdk.NotNullException();
}
atom.IndexRange = Range.NotFound;
var atom2 = LaTeXSettings.AtomForCommand("int");
if (atom2 == null)
{
throw new Xunit.Sdk.NotNullException();
}
Assert.Equal(Range.Zero, atom2.IndexRange);
}
/* //Paste this into the C# Interactive, fill <username> yourself
#r "C:/Users/<username>/source/repos/CSharpMath/Typography/Build/NetStandard/Typography.TextBreak/bin/Debug/netstandard1.3/Typography.TextBreak.dll"
* using Typography.TextBreak;
* (int, WordKind, char)[] BreakText(string text) {
* var breaker = new CustomBreaker();
* var breakList = new List<BreakAtInfo>();
* breaker.BreakWords(text);
* breaker.LoadBreakAtList(breakList);
* //index is after the boundary -> last one will be out of range
* return breakList.Select(i => (i.breakAt, i.wordKind, text.ElementAtOrDefault(i.breakAt))).ToArray();
* }
* BreakText(@"Here are some text $1 + 12 \frac23 \sqrt4$ $$Display$$ text")
*/
/* //Version 2
#r "C:/Users/<username>/source/repos/CSharpMath/Typography/Build/NetStandard/Typography.TextBreak/bin/Debug/netstandard1.3/Typography.TextBreak.dll"
* using Typography.TextBreak;
* string BreakText(string text, string seperator = "|")
* {
* var breaker = new CustomBreaker();
* var breakList = new List<BreakAtInfo>();
* breaker.BreakWords(text);
* breaker.LoadBreakAtList(breakList);
* //reverse to ensure earlier inserts do not affect later ones
* foreach (var @break in breakList.Select(i => i.breakAt).Reverse())
* text = text.Insert(@break, seperator);
* return text;
* }
* BreakText(@"Here are some text $1 + 12 \frac23 \sqrt4$ $$Display$$ text")
*/
public static Result <TextAtom> TextAtomFromLaTeX(string latexSource)
{
if (string.IsNullOrEmpty(latexSource))
{
return(new TextAtom.List(Array.Empty <TextAtom>()));
}
int endAt = 0;
bool?displayMath = null;
var mathLaTeX = new StringBuilder();
bool backslashEscape = false;
bool afterCommand = false; // ignore spaces after command
bool afterNewline = false;
int dollarCount = 0;
var globalAtoms = new TextAtomListBuilder();
List <BreakAtInfo> breakList = new List <BreakAtInfo>(); // Roslyn bug that assumes breakList is nullable resulting in warnings so var is not used
var breaker = new CustomBreaker(v => breakList.Add(new BreakAtInfo(v.LatestBreakAt, v.LatestWordKind)))
{
BreakNumberAfterText = true,
ThrowIfCharOutOfRange = false
};
breaker.BreakWords(latexSource);
Result CheckDollarCount(int startAt, ref int endAt, TextAtomListBuilder atoms)
{
switch (dollarCount)
{
case 0:
break;
case 1:
dollarCount = 0;
switch (displayMath)
{
case true:
return("Cannot close display math mode with $");
case false:
if (atoms.Math(mathLaTeX.ToString(), false, startAt, ref endAt).Error is string error)
{
return(error);
}
mathLaTeX.Clear();
displayMath = null;
break;
case null:
displayMath = false;
break;
}
break;
case 2:
dollarCount = 0;
switch (displayMath)
{
case true:
if (atoms.Math(mathLaTeX.ToString(), true, startAt - 1, ref endAt).Error is string error)
{
return(error);
}
mathLaTeX.Clear();
displayMath = null;
break;
case false:
return("Cannot close inline math mode with $$");
case null:
displayMath = true;
break;
}
break;
default:
return("Invalid number of $: " + dollarCount);
}
return(Ok());
}
Result <int> BuildBreakList(ReadOnlySpan <char> latex, TextAtomListBuilder atoms,
int i, bool oneCharOnly, char stopChar)
{
void ParagraphBreak()
{
atoms.Break();
atoms.Space(Space.ParagraphIndent);
}
for (; i < breakList.Count; i++)
{
void ObtainSection(ReadOnlySpan <char> latexInput, int index,
out int start, out int end, out ReadOnlySpan <char> section, out WordKind kind)
{
(start, end) = (index == 0 ? 0 : breakList[index - 1].breakAt, breakList[index].breakAt);
section = latexInput.Slice(start, end - start);
kind = breakList[index].wordKind;
}
ObtainSection(latex, i, out var startAt, out endAt, out var textSection, out var wordKind);
bool NextSection(ReadOnlySpan <char> latexInput, ref ReadOnlySpan <char> section)
{
bool success = ++i < breakList.Count;
if (success)
{
ObtainSection(latexInput, i, out startAt, out endAt, out section, out wordKind);
}
return(success);
}
Result <TextAtom> ReadArgumentAtom(ReadOnlySpan <char> latexInput)
{
backslashEscape = false;
var argAtoms = new TextAtomListBuilder();
return(BuildBreakList(latexInput, argAtoms, ++i, true, '\0')
.Bind(index => { i = index; return argAtoms.Build(); }));
}
SpanResult <char> ReadArgumentString(ReadOnlySpan <char> latexInput, ref ReadOnlySpan <char> section)
{
afterCommand = false;
if (!NextSection(latexInput, ref section) || section.IsNot('{'))
{
return(Err("Missing {"));
}
int endingIndex = -1;
//startAt + 1 to not start at the { we started at
bool isEscape = false;
for (int j = startAt + 1, bracketDepth = 0; j < latexInput.Length; j++)
{
if (latexInput[j] == '\\')
{
isEscape = true;
}
else if (latexInput[j] == '{' && !isEscape)
{
bracketDepth++;
}
else if (latexInput[j] == '}' && !isEscape)
{
if (bracketDepth > 0)
{
bracketDepth--;
}
else
{
endingIndex = j; break;
}
}
else
{
isEscape = false;
}
}
if (endingIndex == -1)
{
return(Err("Missing }"));
}
var resultText = latexInput.Slice(endAt, endingIndex - endAt);
while (startAt < endingIndex)
{
_ = NextSection(latexInput, ref section); //this never fails because the above check
}
return(Ok(resultText));
}
Result <Color> ReadColor(ReadOnlySpan <char> latexInput, ref ReadOnlySpan <char> section) =>
ReadArgumentString(latexInput, ref section).Bind(color =>
LaTeXSettings.ParseColor(color.ToString()) is Color value ?
Ok(value) :
Err("Invalid color: " + color.ToString())
);
//Nothing should be before dollar sign checking -- dollar sign checking uses continue;
atoms.TextLength = startAt;
if (textSection.Is('$'))
{
if (backslashEscape)
{
if (displayMath != null)
{
mathLaTeX.Append(@"\$");
}
else
{
atoms.Text("$");
}
}
else
{
dollarCount++;
continue;
}
backslashEscape = false;
}
else
{
{ if (CheckDollarCount(startAt, ref endAt, atoms).Error is string error)
{
return(error);
}
}
switch (backslashEscape, displayMath)
{
