/// <summary>
/// Parses a text into an Expression string. Must start with ether " or '
/// </summary>
/// <param name="text"></param>
/// <param name="offset"></param>
/// <param name="context"></param>
/// <param name="index"></param>
/// <returns></returns>
public static MorestachioExpressionString ParseFrom(string text,
int offset,
TokenzierContext context,
out int index)
{
var result = new MorestachioExpressionString(context.CurrentLocation, text[offset]);
var isEscapeChar = false;
var sb = new StringBuilder();
//skip the string delimiter
for (index = offset + 1; index < text.Length; index++)
{
var c = text[index];
if (isEscapeChar)
{
sb.Append(c);
if (c == result.Delimiter)
{
isEscapeChar = false;
}
}
else
{
if (c == '\\')
{
isEscapeChar = true;
}
else if (c == result.Delimiter)
{
if (offset == 0 && index + 1 != text.Length)
{
context.Errors.Add(new MorestachioSyntaxError(
context
.CurrentLocation
.Offset(index)
.AddWindow(new CharacterSnippedLocation(0, index, text)),
"", c.ToString(), "did not expect " + result.Delimiter));
break;
}
break;
}
else
{
sb.Append(c);
}
}
}
var currentPart = new ExpressionStringConstPart(sb.ToString(), context.CurrentLocation);
result.StringParts.Add(currentPart);
context.AdvanceLocation(text.Length);
return(result);
}
/// <inheritdoc />
public void ReadXml(XmlReader reader)
{
Location = CharacterLocation.FromFormatString(reader.GetAttribute(nameof(Location)));
if (reader.IsEmptyElement)
{
return;
}
reader.ReadStartElement();
while (reader.Name == nameof(ExpressionStringConstPart) && reader.NodeType != XmlNodeType.EndElement)
{
var constStr = new ExpressionStringConstPart();
constStr.Location = CharacterLocation.FromFormatString(reader.GetAttribute(nameof(Location)));
var constStrPartText = reader.ReadElementContentAsString();
Delimiter = constStrPartText[0];
constStr.PartText = constStrPartText.Substring(1, constStrPartText.Length - 2);
StringParts.Add(constStr);
reader.ReadEndElement();
}
}
/// <summary>
/// Parses a text into an Expression string. Must start with ether " or '
/// </summary>
/// <param name="text"></param>
/// <param name="offset"></param>
/// <param name="context"></param>
/// <param name="index"></param>
/// <returns></returns>
public static MorestachioExpressionString ParseFrom(string text,
int offset,
TokenzierContext context,
out int index)
{
var result = new MorestachioExpressionString()
{
Location = context.CurrentLocation
};
var isEscapeChar = false;
var currentPart = new ExpressionStringConstPart()
{
Location = context.CurrentLocation,
PartText = string.Empty
};
//get the string delimiter thats ether " or '
result.Delimiter = text[offset];
result.StringParts.Add(currentPart);
//skip the string delimiter
for (index = offset + 1; index < text.Length; index++)
{
var c = text[index];
if (isEscapeChar)
{
currentPart.PartText += c;
if (c == result.Delimiter)
{
isEscapeChar = false;
}
}
else
{
if (c == '\\')
{
isEscapeChar = true;
}
else if (c == result.Delimiter)
{
if (offset == 0 && index + 1 != text.Length)
{
context.Errors.Add(new MorestachioSyntaxError(
context
.CurrentLocation
.Offset(index)
.AddWindow(new CharacterSnippedLocation(0, index, text)),
"", c.ToString(), "did not expect " + result.Delimiter));
break;
}
break;
}
else
{
currentPart.PartText += c;
}
}
}
context.AdvanceLocation(text.Length);
return(result);
}