protected override void OnExecute(Engine engine)
{
var value = Value != null ? Value.Get(engine) : null;
if (engine.ScriptDepth == 1)
engine.DefineVariableInParentScope(VariableName, value);
else
engine.DefineVariable(VariableName, value);
}
protected override object OnGet(Engine engine)
{
if (Path != null && CodeTree.Compile(engine, CodeType.Get, Path).IsSetOrIncrement)
return CodeTree.Get(engine);
var value = engine.Get(ValueProperty, ValuePath, ValueCodeTree);
if (Var != null)
{
var variable = engine.GetVariable(Var, VarCodeTree);
if (Op != AssignmentOp.Assign)
{
var oldValue = engine.GetVariable(variable);
value = engine.Operator(Op, oldValue, value);
}
engine.DefineVariableInParentScope(variable, value);
return value;
}
if (IsBareTarget)
{
var target = engine.Get(TargetProperty);
target = engine.Operator(Op, target, value);
Target = value;
return value;
}
var context = engine.Context;
var type = engine.GetType(TypeProperty, TypePath, TypeCodeTree);
if (Op != AssignmentOp.Assign)
{
object oldValue = null;
if (DependencyProperty != null)
oldValue = PathHelper.GetDependencyProperty(engine, context as DependencyObject, DependencyProperty);
else if (PropertyName != null)
oldValue = PathHelper.GetProperty(engine, context, PropertyName);
else if (FieldName != null)
oldValue = PathHelper.GetField(engine, context, FieldName);
else if (StaticPropertyName != null)
oldValue = PathHelper.GetStaticProperty(engine, type, StaticPropertyName);
else if (StaticFieldName != null)
oldValue = PathHelper.GetStaticField(engine, type, StaticFieldName);
else if (Path != null)
oldValue = engine.GetPath(Path, CodeTree);
else
oldValue = context;
value = engine.Operator(Op, oldValue, value);
}
if (DependencyProperty != null)
PathHelper.SetDependencyProperty(engine, context as DependencyObject, DependencyProperty, value);
else if (PropertyName != null)
PathHelper.SetProperty(engine, context, PropertyName, value);
else if (FieldName != null)
PathHelper.SetField(engine, context, FieldName, value);
else if (StaticPropertyName != null)
PathHelper.SetStaticProperty(engine, type, StaticPropertyName, value);
else if (StaticFieldName != null)
PathHelper.SetStaticField(engine, type, StaticFieldName, value);
else if (Path != null)
engine.SetPath(Path, SetCodeTree, value);
else
Context = value;
return value;
}