private XMLResult ExecWhile(XElement xElem, XMLContext context)
{
var test = (String)xElem.Attribute("test");
if (String.IsNullOrWhiteSpace(test))
{
throw new Exception();
}
var subContent = new XMLContext(context);
while (EvalLogic(test, context))
{
var xmlResult = ExecContent(xElem, subContent);
if (ReferenceEquals(xmlResult, XMLBreak.Value))
{
break;
}
if (xmlResult != null)
{
return(xmlResult);
}
}
subContent.Clear();
return(null);
}
private XMLResult ExecFor(XElement xElem, XMLContext context)
{
var @var = (String)xElem.Attribute("var");
var start = (String)xElem.Attribute("start");
var end = (String)xElem.Attribute("end");
var step = (String)xElem.Attribute("step");
if (String.IsNullOrWhiteSpace(@var))
{
throw new Exception();
}
var startVal = Convert.ToString(EvalObj(start, context));
var endVal = Convert.ToString(EvalObj(end, context));
var stepVal = Convert.ToString(EvalObj(step, context));
double startDbl;
if (!double.TryParse(startVal, NumberStyles.Any, NumberFormatInfo.CurrentInfo, out startDbl))
{
throw new Exception();
}
double endDbl;
if (!double.TryParse(endVal, NumberStyles.Any, NumberFormatInfo.CurrentInfo, out endDbl))
{
throw new Exception();
}
double stepDbl;
if (!double.TryParse(stepVal, NumberStyles.Any, NumberFormatInfo.CurrentInfo, out stepDbl))
{
stepDbl = 1D;
}
var subContent = new XMLContext(context);
for (double i = startDbl; i < endDbl; i += stepDbl)
{
subContent.SetValue(@var, i);
var xmlResult = ExecContent(xElem, subContent);
if (ReferenceEquals(xmlResult, XMLBreak.Value))
{
break;
}
if (xmlResult != null)
{
return(xmlResult);
}
}
subContent.Clear();
return(null);
}
private XMLResult ExecCheck(XElement xElem, XMLContext context)
{
var ifXElem = xElem.Element("if");
if (ifXElem == null)
{
throw new Exception();
}
var elseifsXElems = xElem.Elements("elseif");
var elseXElem = xElem.Element("else");
var ifTest = (String)ifXElem.Attribute("test");
var ifRes = EvalLogic(ifTest, context);
if (ifRes)
{
var subContent = new XMLContext(context);
var xmlResult = ExecContent(ifXElem, subContent);
subContent.Clear();
return(xmlResult);
}
foreach (var elseifsXElem in elseifsXElems)
{
var elseIfTest = (String)elseifsXElem.Attribute("test");
var elseIfRes = EvalLogic(elseIfTest, context);
if (elseIfRes)
{
var subContent = new XMLContext(context);
var xmlResult = ExecContent(elseifsXElem, subContent);
subContent.Clear();
return(xmlResult);
}
}
if (elseXElem != null)
{
var subContent = new XMLContext(context);
var xmlResult = ExecContent(elseXElem, subContent);
subContent.Clear();
return(xmlResult);
}
return(null);
}
private XMLResult ExecForEach(XElement xElem, XMLContext context)
{
var @var = (String)xElem.Attribute("var");
if (String.IsNullOrWhiteSpace(@var))
{
throw new Exception();
}
var items = (String)xElem.Attribute("items");
if (String.IsNullOrWhiteSpace(items))
{
throw new Exception();
}
var list = EvalObj(items, context) as IEnumerable;
if (list == null)
{
throw new Exception();
}
var subContent = new XMLContext(context);
foreach (var item in items)
{
subContent.SetValue(@var, item);
var xmlResult = ExecContent(xElem, subContent);
if (ReferenceEquals(xmlResult, XMLBreak.Value))
{
break;
}
if (xmlResult != null)
{
return(xmlResult);
}
}
subContent.Clear();
return(null);
}