private void ProcessNamespace(string ns)
{
if (processedNamespaces.Contains(ns))
{
return;
}
processedNamespaces.Add(ns);
var lastDotIndex = ns.LastIndexOf('.');
var parentNamespace = lastDotIndex != -1 ? ns.Substring(0, lastDotIndex) : null;
if (parentNamespace != null)
{
ProcessNamespace(parentNamespace);
}
JsBinaryExpression result;
if (lastDotIndex == -1)
{
result = Js.Assign(Js.Reference("window").Member(ns), Js.Object());
}
else
{
result = Js.Assign(Js.Reference(ns), Js.Object());
}
result.Right = Js.Binary(JsBinaryOperator.LogicalOr, result.Left, result.Right);
body.Express(result);
}
public override JsNode Visit(JsReturnStatement node)
{
escapeStatements.Add(new EscapeStatement {
Type = Return
});
return(Js.Return(Js.Object(
Js.Item(EscapeTypeField, Js.Primitive(Return)),
Js.Item(EscapeValueField, node.Expression != null ? node.Expression : Js.Null()),
Js.Item(EscapeDepthField, Js.Primitive(loopDepth))
).Compact()));
}
public override JsNode Visit(JsBreakStatement node)
{
escapeStatements.Add(new EscapeStatement {
Type = Break, Label = node.Label
});
return(Js.Return(Js.Object(
Js.Item(EscapeTypeField, Js.Primitive(Break)),
Js.Item(EscapeLabelField, node.Label != null ? Js.Primitive(node.Label) : Js.Null()),
Js.Item(EscapeDepthField, node.Label != null ? Js.Primitive(transformer.GetLabelDepth(node.Label)) : Js.Primitive(0))
).Compact()));
}
private JsStatement TransformBody(JsStatement body)
{
var block = body is JsBlockStatement ? (JsBlockStatement)body : Js.Block(body);
if (!escapeStatements.Any())
{
return(Js.Express(idioms.Wrap(block)));
}
else
{
if (!(block.Statements.Last() is JsReturnStatement))
{
block.Return(Js.Object(Js.Item(EscapeTypeField, Js.Primitive(0))).Compact());
}
var wrapped = idioms.Wrap(block);
var outerBlock = new JsBlockStatement();
var loopResult = outerBlock.Local("$loopResult", wrapped);
if (escapeStatements.Any(x => x.Type == Return))
{
outerBlock.If(loopResult.GetReference().Member(EscapeTypeField).EqualTo(Js.Primitive(Return)),
Js.Return(loopResult.GetReference().Member(EscapeValueField)));
}
if (escapeStatements.Any(x => x.Type == Continue))
{
var escapes = escapeStatements.Where(x => x.Type == Continue).Distinct();
JsStatement ifTrue;
if (!escapes.Any(x => x.Label != null))
{
ifTrue = Js.Continue();
}
else
{
ifTrue = Js.Switch(
loopResult.GetReference().Member(EscapeLabelField),
escapes
.Where(x => x.Label == null)
.Select(x => Js.Section(Js.Null()).Statement(Js.Continue()))
.Concat(escapes
.Where(x => x.Label != null && transformer.GetLabelDepth(x.Label) == loopDepth)
.Select(x => Js.Section(Js.Primitive(x.Label)).Statement(Js.Continue(x.Label))))
.Concat(new[] { Js.Section(Js.DefaultLabel()).Statements(Js.Return(loopResult.GetReference())) })
.ToArray());
}
outerBlock.If(loopResult.GetReference().Member(EscapeTypeField).EqualTo(Js.Primitive(Continue)),
ifTrue);
}
if (escapeStatements.Any(x => x.Type == Break))
{
var escapes = escapeStatements.Where(x => x.Type == Break).Distinct();
JsStatement ifTrue;
if (!escapes.Any(x => x.Label != null))
{
ifTrue = Js.Break();
}
else
{
ifTrue = Js.Switch(loopResult.GetReference().Member(EscapeLabelField),
escapes.Select(x => Js.Section(Js.Primitive(x.Label)).Statement(Js.Break(x.Label))).ToArray());
}
outerBlock.If(loopResult.GetReference().Member(EscapeTypeField).EqualTo(Js.Primitive(Break)),
ifTrue);
}
return(outerBlock);
}
}
