/// <summary>
/// Parse the command arguments for the bounding-box command.
/// </summary>
/// <param name="args"></param>
/// <param name="idx"></param>
/// <param name="switchOut"></param>
/// <returns></returns>
public override int Parse(string[] args, int idx, out Switch switchOut)
{
// check next argument.
if (args.Length < idx + 3)
{
throw new SwitchParserException("None", "Invalid bounding-box command!");
}
bool topOk = false, bottomOk = false, leftOk = false, rightOk = false;
float top = 0, bottom = 0, left = 0, right = 0;
for (int currentArg = idx; currentArg < idx + 4; currentArg++)
{
string[] argSplit = args[currentArg].Split('=');
if (argSplit.Length != 2 ||
argSplit[0] == null ||
argSplit[1] == null)
{
throw new SwitchParserException(args[currentArg],
"Invalid boundary condition for boundingbox command!");
}
argSplit[0] = argSplit[0].ToLower();
argSplit[0] = SwitchParser.RemoveQuotes(argSplit[0]);
argSplit[1] = SwitchParser.RemoveQuotes(argSplit[1]);
if (argSplit[0] == "top")
{
if (
!float.TryParse(argSplit[1], NumberStyles.Float,
System.Globalization.CultureInfo.InvariantCulture, out top))
{
throw new SwitchParserException(args[currentArg],
"Invalid boundary condition for boundingbox command!");
}
topOk = true;
}
else if (argSplit[0] == "left")
{
if (
!float.TryParse(argSplit[1], NumberStyles.Float,
System.Globalization.CultureInfo.InvariantCulture, out left))
{
throw new SwitchParserException(args[currentArg],
"Invalid boundary condition for boundingbox command!");
}
leftOk = true;
}
else if (argSplit[0] == "bottom")
{
if (
!float.TryParse(argSplit[1], NumberStyles.Float,
System.Globalization.CultureInfo.InvariantCulture, out bottom))
{
throw new SwitchParserException(args[currentArg],
"Invalid boundary condition for boundingbox command!");
}
bottomOk = true;
}
else if (argSplit[0] == "right")
{
if (
!float.TryParse(argSplit[1], NumberStyles.Float,
System.Globalization.CultureInfo.InvariantCulture, out right))
{
throw new SwitchParserException(args[currentArg],
"Invalid boundary condition for boundingbox command!");
}
rightOk = true;
}
else
{
throw new SwitchParserException(args[currentArg],
"Invalid boundary condition for boundingbox command!");
}
}
if (!(bottomOk && topOk && leftOk && rightOk))
{
throw new SwitchParserException("None",
"Invalid bounding-box command, at least one of the boundaries is missing!");
}
// everything ok, take the next argument as the filename.
switchOut = new SwitchFilterBoundingBox()
{
Top = top,
Bottom = bottom,
Left = left,
Right = right
};
return(4);
}