/// <summary>
/// Add transition corresponding to Special or Uri.
/// </summary>
internal RuleRef(ParseElementCollection parent, Backend backend, Uri uri, List <Rule> undefRules, string semanticKey, string initParameters)
: base(parent._rule)
{
string id = uri.OriginalString;
Rule ruleRef = null;
int posPound = id.IndexOf('#');
// Get the initial state for the RuleRef.
if (posPound == 0)
{
// Internal RuleRef. Get InitialState of RuleRef.
// GetRuleRef() may temporarily create a Rule placeholder for later resolution.
ruleRef = GetRuleRef(backend, id.Substring(1), undefRules);
}
else
{
// External RuleRef. Build URL:GrammarUri#RuleName
StringBuilder sbExternalRuleUri = new("URL:");
// Add the parameters to initialize a rule
if (!string.IsNullOrEmpty(initParameters))
{
// look for the # and insert the parameters
sbExternalRuleUri.Append(posPound > 0 ? id.Substring(0, posPound) : id);
sbExternalRuleUri.Append('>');
sbExternalRuleUri.Append(initParameters);
if (posPound > 0)
{
sbExternalRuleUri.Append(id.Substring(posPound));
}
}
else
{
sbExternalRuleUri.Append(id);
}
// Get InitialState of external RuleRef.
string sExternalRuleUri = sbExternalRuleUri.ToString();
ruleRef = backend.FindRule(sExternalRuleUri);
if (ruleRef == null)
{
ruleRef = backend.CreateRule(sExternalRuleUri, SPCFGRULEATTRIBUTES.SPRAF_Import);
}
}
Arc rulerefArc = backend.RuleTransition(ruleRef, _rule, 1.0f);
#pragma warning disable 0618
if (!string.IsNullOrEmpty(semanticKey))
{
CfgGrammar.CfgProperty propertyInfo = new();
propertyInfo._pszName = "SemanticKey";
propertyInfo._comValue = semanticKey;
propertyInfo._comType = VarEnum.VT_EMPTY;
backend.AddPropertyTag(rulerefArc, rulerefArc, propertyInfo);
}
#pragma warning restore 0618
parent.AddArc(rulerefArc);
}
internal RuleRef(ParseElementCollection parent, Backend backend, Uri uri, List <Rule> undefRules, string semanticKey, string initParameters)
: base(parent._rule)
{
string originalString = uri.OriginalString;
Rule rule = null;
int num = originalString.IndexOf('#');
if (num == 0)
{
rule = GetRuleRef(backend, originalString.Substring(1), undefRules);
}
else
{
StringBuilder stringBuilder = new StringBuilder("URL:");
if (!string.IsNullOrEmpty(initParameters))
{
stringBuilder.Append((num > 0) ? originalString.Substring(0, num) : originalString);
stringBuilder.Append('>');
stringBuilder.Append(initParameters);
if (num > 0)
{
stringBuilder.Append(originalString.Substring(num));
}
}
else
{
stringBuilder.Append(originalString);
}
string text = stringBuilder.ToString();
rule = backend.FindRule(text);
if (rule == null)
{
rule = backend.CreateRule(text, SPCFGRULEATTRIBUTES.SPRAF_Import);
}
}
Arc arc = backend.RuleTransition(rule, _rule, 1f);
if (!string.IsNullOrEmpty(semanticKey))
{
backend.AddPropertyTag(arc, arc, new CfgGrammar.CfgProperty
{
_pszName = "SemanticKey",
_comValue = semanticKey,
_comType = VarEnum.VT_EMPTY
});
}
parent.AddArc(arc);
}
