public XmlHighlightingDefinition(XshdSyntaxDefinition xshd, IHighlightingDefinitionReferenceResolver resolver)
{
this.Name = xshd.Name;
// Create HighlightingRuleSet instances
var rnev = new RegisterNamedElementsVisitor(this);
xshd.AcceptElements(rnev);
// Assign MainRuleSet so that references can be resolved
foreach (XshdElement element in xshd.Elements)
{
XshdRuleSet xrs = element as XshdRuleSet;
if (xrs != null && xrs.Name == null)
{
if (MainRuleSet != null)
{
throw Error(element, "Duplicate main RuleSet. There must be only one nameless RuleSet!");
}
else
{
MainRuleSet = rnev.ruleSets[xrs];
}
}
}
if (MainRuleSet == null)
{
throw new HighlightingDefinitionInvalidException("Could not find main RuleSet.");
}
// Translate elements within the rulesets (resolving references and processing imports)
xshd.AcceptElements(new TranslateElementVisitor(this, rnev.ruleSets, resolver));
}
/// <summary>
/// Creates a highlighting definition from the XSHD file.
/// </summary>
public static IHighlightingDefinition Load(XshdSyntaxDefinition syntaxDefinition, IHighlightingDefinitionReferenceResolver resolver)
{
if (syntaxDefinition == null)
{
throw new ArgumentNullException("syntaxDefinition");
}
return(new XmlHighlightingDefinition(syntaxDefinition, resolver));
}
XshdSyntaxDefinition ParseDefinition(XmlElement syntaxDefinition)
{
XshdSyntaxDefinition def = new XshdSyntaxDefinition();
def.Name = syntaxDefinition.GetAttributeOrNull("name");
if (syntaxDefinition.HasAttribute("extensions"))
{
def.Extensions.AddRange(syntaxDefinition.GetAttribute("extensions").Split(';', '|'));
}
XshdRuleSet mainRuleSetElement = null;
foreach (XmlElement element in syntaxDefinition.GetElementsByTagName("RuleSet"))
{
XshdRuleSet ruleSet = ImportRuleSet(element);
def.Elements.Add(ruleSet);
if (ruleSet.Name == null)
{
mainRuleSetElement = ruleSet;
}
if (syntaxDefinition["Digits"] != null)
{
// create digit highlighting rule
const string optionalExponent = @"([eE][+-]?[0-9]+)?";
const string floatingPoint = @"\.[0-9]+";
ruleSet.Elements.Add(
new XshdRule {
ColorReference = GetColorReference(syntaxDefinition["Digits"]),
RegexType = XshdRegexType.IgnorePatternWhitespace,
Regex = @"\b0[xX][0-9a-fA-F]+"
+ @"|\b"
+ @"(\d+(" + floatingPoint + ")?"
+ @"|" + floatingPoint + ")"
+ optionalExponent
});
}
}
if (syntaxDefinition.HasAttribute("extends") && mainRuleSetElement != null)
{
// convert 'extends="HTML"' to '<Import ruleSet="HTML/" />' in main rule set.
mainRuleSetElement.Elements.Add(
new XshdImport {
RuleSetReference = new XshdReference <XshdRuleSet>(
syntaxDefinition.GetAttribute("extends"), string.Empty
)
});
}
return(def);
}
static XshdSyntaxDefinition ParseDefinition(XmlReader reader)
{
Debug.Assert(reader.LocalName == "SyntaxDefinition");
XshdSyntaxDefinition def = new XshdSyntaxDefinition();
def.Name = reader.GetAttribute("name");
string extensions = reader.GetAttribute("extensions");
if (extensions != null)
{
def.Extensions.AddRange(extensions.Split(';'));
}
ParseElements(def.Elements, reader);
Debug.Assert(reader.NodeType == XmlNodeType.EndElement);
Debug.Assert(reader.LocalName == "SyntaxDefinition");
return(def);
}
/// <summary>
/// Writes the specified syntax definition.
/// </summary>
public void WriteDefinition(XshdSyntaxDefinition definition)
{
if (definition == null)
{
throw new ArgumentNullException("definition");
}
writer.WriteStartElement("SyntaxDefinition", Namespace);
if (definition.Name != null)
{
writer.WriteAttributeString("name", definition.Name);
}
if (definition.Extensions != null)
{
writer.WriteAttributeString("extensions", string.Join(";", definition.Extensions.ToArray()));
}
definition.AcceptElements(this);
writer.WriteEndElement();
}