protected virtual void OnAfterSetItem(ScopeArgs args)
{
if (AfterSetItem != null)
{
AfterSetItem(this, args);
}
}
protected virtual void OnBeforeSetItem(ScopeArgs args)
{
if (BeforeSetItem != null)
{
BeforeSetItem(this, args);
}
}
public override void CreateVariable(string id, object value)
{
var args = new ScopeArgs(id, value, ScopeOperation.Create);
OnBeforeSetItem(args);
if (args.Cancel) return;
base.CreateVariable(id, value);
OnAfterSetItem(args);
if (args.Cancel) {
throw new ScriptIdNotFoundException(string.Format(Strings.IdProcessingCanceledByUser, id));
}
}
protected override void OnFirstRun()
{
base.OnFirstRun();
object memberExprValue;
if (ScopeArgs.TryGetValue(this.varName, out memberExprValue))
{
InitializeValueFn(memberExprValue);
}
else
{
staticValueFn = DataBinder.CompileStaticAccessToString(memberExpr);
}
}
private void ScopeBeforeSetItem(IScriptScope sender, ScopeArgs args)
{
//TODO: Performance improvement. Should be evaluated once per function call
List <string> globalNames = GetGlobalNames(activeContext);
if (globalNames.Contains(args.Name))
{
SetToParentScope(sender.Parent, args.Name, args.Value);
args.Cancel = true;
}
//if (!sender.HasVariable(args.Name))
//{
// args.Cancel = SetToParentScope(sender.Parent, args.Name, args.Value);
//}
}
protected override void OnFirstRun()
{
base.OnFirstRun();
object memberExprValue;
if (ScopeArgs.TryGetValue(this.varName, out memberExprValue))
{
valueFn = this.ReferencesSelf
? Convert.ToString
: DataBinder.CompileToString(memberExprValue.GetType(), modelMemberExpr);
}
else
{
staticValueFn = DataBinder.CompileStaticAccessToString(memberExpr);
}
}
public override void CreateVariable(string id, object value)
{
var args = new ScopeArgs(id, value, ScopeOperation.Create);
OnBeforeSetItem(args);
if (args.Cancel)
{
return;
}
base.CreateVariable(id, value);
OnAfterSetItem(args);
if (args.Cancel)
{
throw new ScriptIdNotFoundException(string.Format(Strings.IdProcessingCanceledByUser, id));
}
}
private void ScopeBeforeSetItem(IScriptScope sender, ScopeArgs args)
{
if (_globalNames.Contains(args.Name))
{
switch (args.Operation)
{
case ScopeOperation.Set:
ScriptQualifiedName.SetToParentScope(sender.Parent, args.Name, args.Value);
args.Cancel = true;
break;
case ScopeOperation.Create:
throw new ScriptExecutionException(string.Format(Strings.LocalIdConflictWithGlobalList, args.Name));
default:
break;
}
}
}
public override object GetItem(string id, bool throwException)
{
var args = new ScopeArgs(id, RuntimeHost.NullValue, ScopeOperation.Get);
OnBeforeGetItem(args);
if (args.Cancel)
{
if (args.Value != RuntimeHost.NullValue)
return args.Value;
throw new ScriptIdNotFoundException(id);
}
args.Value = base.GetItem(id, throwException);
OnAfterGetItem(args);
if (args.Cancel)
{
throw new ScriptIdNotFoundException(string.Format(Strings.IdProcessingCanceledByUser, id));
}
return args.Value;
}
public override object GetItem(string id, bool throwException)
{
var args = new ScopeArgs(id, RuntimeHost.NullValue, ScopeOperation.Get);
OnBeforeGetItem(args);
if (args.Cancel)
{
if (args.Value != RuntimeHost.NullValue)
{
return(args.Value);
}
throw new ScriptIdNotFoundException(id);
}
args.Value = base.GetItem(id, throwException);
OnAfterGetItem(args);
if (args.Cancel)
{
throw new ScriptIdNotFoundException(string.Format(Strings.IdProcessingCanceledByUser, id));
}
return(args.Value);
}
protected virtual void OnBeforeGetItem(ScopeArgs args)
{
if (BeforeGetItem != null)
BeforeGetItem(this, args);
}
protected virtual void OnAfterSetItem(ScopeArgs args)
{
if (AfterSetItem != null)
AfterSetItem(this, args);
}
private void CheckContractInvariant(object sender, ScopeArgs args)
{
_contract.CheckInv(_activeContext);
}
