/// <summary>Pre-process the important bits of input and store in private fields.</summary>
/// <remarks>This allows the input to be available for validation and the main execute method.</remarks>
/// <param name="actionInput">The full input specified for executing the command.</param>
private void PreprocessInput(ActionInput actionInput)
{
// Make sure there is a sender.
this.sender = actionInput.Controller;
this.session = this.sender as Session;
if (this.sender == null || this.sender.Thing == null)
{
return;
}
// Make sure the sender is an actual connected user.
this.userControlledBehavior = this.sender.Thing.Behaviors.FindFirst <UserControlledBehavior>();
if (this.userControlledBehavior == null)
{
return;
}
// Parse and store the desired buffer length, if one was provided.
string lengthText = actionInput.Tail.ToLower().Trim();
if (string.IsNullOrEmpty(lengthText))
{
this.parseSucceeded = true;
}
else if (lengthText == "auto")
{
this.parsedBufferLength = -1;
this.parseSucceeded = true;
}
else
{
this.parseSucceeded = this.TryParse(lengthText, out this.parsedBufferLength);
}
}
/// <summary>Displays the current buffer length to the user, handling the special case of "auto" instead of -1.</summary>
private void ShowCurrentBuffer(UserControlledBehavior userControlledBehavior)
{
if (userControlledBehavior.PagingRowLimit == -1)
{
session.WriteLine($"Your screen buffer size is 'auto' (currently {session.TerminalOptions.Height} lines).");
}
else
{
session.WriteLine($"Your screen buffer is set to {userControlledBehavior.PagingRowLimit} lines.");
}
}