private Regex CreateRegex(XshdElement position, string regex, XshdRegexType regexType)
{
if (regex == null)
{
throw Error(position, "Regex missing");
}
var options = RegexOptions.CultureInvariant | RegexOptions.ExplicitCapture;
if (regexType == XshdRegexType.IgnorePatternWhitespace)
{
options |= RegexOptions.IgnorePatternWhitespace;
}
if (_ignoreCase)
{
options |= RegexOptions.IgnoreCase;
}
try
{
return(new Regex(regex, options));
}
catch (ArgumentException ex)
{
throw Error(position, ex.Message);
}
}
/// <summary>
/// Sets the element's position to the XmlReader's position.
/// </summary>
private static void SetPosition(XshdElement element, XmlReader reader)
{
if (reader is IXmlLineInfo lineInfo)
{
element.LineNumber = lineInfo.LineNumber;
element.ColumnNumber = lineInfo.LinePosition;
}
}
private static Exception Error(XshdElement element, string message)
{
if (element.LineNumber > 0)
{
return(new HighlightingDefinitionInvalidException(
"Error at line " + element.LineNumber + ":\n" + message));
}
return(new HighlightingDefinitionInvalidException(message));
}
private HighlightingRuleSet GetRuleSet(XshdElement position, XshdReference <XshdRuleSet> ruleSetReference)
{
if (ruleSetReference.InlineElement != null)
{
return((HighlightingRuleSet)ruleSetReference.InlineElement.AcceptVisitor(this));
}
if (ruleSetReference.ReferencedElement != null)
{
var definition = GetDefinition(position, ruleSetReference.ReferencedDefinition);
var ruleSet = definition.GetNamedRuleSet(ruleSetReference.ReferencedElement);
if (ruleSet == null)
{
throw Error(position, "Could not find rule set named '" + ruleSetReference.ReferencedElement + "'.");
}
return(ruleSet);
}
return(null);
}
private IHighlightingDefinition GetDefinition(XshdElement position, string definitionName)
{
if (definitionName == null)
{
return(_def);
}
if (_resolver == null)
{
throw Error(position, "Resolving references to other syntax definitions is not possible because the IHighlightingDefinitionReferenceResolver is null.");
}
var d = _resolver.GetDefinition(definitionName);
if (d == null)
{
throw Error(position, "Could not find definition with name '" + definitionName + "'.");
}
return(d);
}
private HighlightingColor GetColor(XshdElement position, XshdReference <XshdColor> colorReference)
{
if (colorReference.InlineElement != null)
{
return((HighlightingColor)colorReference.InlineElement.AcceptVisitor(this));
}
if (colorReference.ReferencedElement != null)
{
var definition = GetDefinition(position, colorReference.ReferencedDefinition);
var color = definition.GetNamedColor(colorReference.ReferencedElement);
if (color == null)
{
throw Error(position, "Could not find color named '" + colorReference.ReferencedElement + "'.");
}
return(color);
}
return(null);
}