private void EmbedExceptionMessage(DekiScriptDom expr, DekiScriptEnv env, DekiScriptEvalContext context, Exception exception, XmlNode parent)
{
if (exception is DreamRequestFatalException)
{
exception.Rethrow();
}
context.InsertExceptionMessageBeforeNode(env, parent, null, expr.Location, exception);
}
public XDoc Evaluate(DekiScriptDom expr, DekiScriptEvalMode mode, bool fallthrough, DekiScriptEnv env)
{
DekiScriptEvalContext context = new DekiScriptEvalContext(mode, fallthrough);
try {
expr.VisitWith(this, new DekiScriptDomEvaluationState(context, context.Document, env));
} catch (DekiScriptDocumentTooLargeException) {
// this exception is thrown to unwind the DOM stack; we can safely ignore it
}
context.MergeContextIntoDocument(context.Document);
return(new XDoc(context.Document));
}
private void EvaluateAttribute(DekiScriptDomElement.Attribute expr, DekiScriptEvalContext context, XmlElement element, DekiScriptEnv env)
{
if (!expr.IsNamespaceDefinition)
{
try {
string name = expr.Name.VisitWith(DekiScriptExpressionEvaluation.Instance, env).AsString();
if (name != null)
{
name = XmlConvert.EncodeLocalName(name);
string value = expr.Value.VisitWith(DekiScriptExpressionEvaluation.Instance, env).AsString();
if (value != null)
{
element.SetAttribute(name, context.Namespaces.LookupNamespace(expr.Prefix), value);
}
}
} catch (Exception e) {
context.InsertExceptionMessageBeforeNode(env, element, null, expr.Location, e);
}
}
}
//--- Constructor ---
public DekiScriptDomEvaluationState(DekiScriptEvalContext context, XmlNode parent, DekiScriptEnv env)
{
this.Context = context;
this.Env = env;
this.Parent = parent;
}
private void EvaluateNamespaceDefinitionAttribute(DekiScriptDomElement.Attribute expr, DekiScriptEvalContext context, DekiScriptEnv env)
{
if (expr.IsNamespaceDefinition)
{
DekiScriptLiteral name = expr.Name.VisitWith(DekiScriptExpressionEvaluation.Instance, env);
DekiScriptLiteral value = expr.Value.VisitWith(DekiScriptExpressionEvaluation.Instance, env);
if (!value.IsNil)
{
if (string.IsNullOrEmpty(expr.Prefix))
{
context.Namespaces.AddNamespace(string.Empty, value.AsString());
}
else
{
context.Namespaces.AddNamespace(XmlConvert.EncodeLocalName(name.AsString() ?? string.Empty), value.AsString());
}
}
}
}