///<summary>Set variables specified in the sv parameter, execute a certain action, then restore the set variables back.</summary>
///<param name="method">Delegate to execute</param>
///<param name="sv">Variables to set/restore before/after execution</param>
///<param name="prefix">Add a given prefix to the variable names.</param>
///<returns></returns>
public object ExecuteWithVars(ScriptExecuteMethod method, Vars sv, string prefix)
{
var save = new Dictionary <string, object>();
var delete = new List <string>();
try
{
foreach (var v in sv)
{
string vn = prefix + v.Name;
object o = GetOrDefault(vn, null);
if (o == null && !IsSet(vn))
{
delete.Add(v.Name);
}
else
{
save[v.Name] = o;
}
this[vn] = v.Value;
}
return(method());
}
finally
{
foreach (var savePair in save)
{
string vn = prefix + savePair.Key;
if (IsSet(vn))
{
sv[savePair.Key] = Get(vn);
}
else
{
sv.Remove(savePair.Key);
}
this[vn] = savePair.Value;
}
foreach (var d in delete)
{
string vn = prefix + d;
if (IsSet(vn))
{
sv[d] = Get(vn);
}
else
{
sv.Remove(d);
}
Remove(vn);
}
}
}
/// Execute the given script action on call stack
protected object RunOnStack(ScriptOperation operation, IScriptAction action, ScriptExecuteMethod method)
{
if (action == null)
{
return(null);
}
using (var scope = new ScriptContextScope(this))
{
_callStack.Push(operation, action);
OnProgress(0);
try
{
// one can put a breakpoint here to be called on every method call
object ret = method();
OnProgressInternal(100, null);
return(ret);
}
catch (ScriptTerminateException)
{
throw;
}
catch (ScriptExceptionWithStackTrace)
{
throw;
}
catch (ThreadAbortException)
{
_abortStarted = true;
throw;
}
catch (Exception e)
{
throw new ScriptExceptionWithStackTrace(this, e);
}
finally
{
_callStack.Pop();
}
}
}
