private string ExecuteCommand(string line)
{
const string duplicateSpacesRegex = @"\s+";
string[] commandWords = Regex.Replace(line, duplicateSpacesRegex, " ").Split(' ');
string output = "";
switch (commandWords[0].ToLower())
{
case CommandSyntax.Commands.Set:
if (!FocusedControl.Attributes.ContainsKey(commandWords[1]))
{
throw new FormatException(); // InvalidAttributeException
}
FocusedControl.Attributes[commandWords[1]] = commandWords[2];
break;
case CommandSyntax.Commands.Tree:
{
output = $"{FocusedControl}\n";
Tree(FocusedControl, 1);
void Tree(Control control, int indentation)
{
foreach (var child in control.Controls)
{
output += $"{new string('\t', indentation)}{child}\n";
Tree(child, indentation + 1);
}
}
}
break;
case CommandSyntax.Commands.Append:
{
if (!TryGetControl(out Control control))
{
throw new FormatException();
}
Control.Load(control);
}
break;
case CommandSyntax.Commands.Attributes:
{
output = $"{FocusedControl.Type}\n";
foreach (var attribute in FocusedControl.Attributes)
{
output += $"{attribute}\n";
}
}
break;
case CommandSyntax.Commands.Focus:
{
if (!TryGetReference(out ControlReference reference))
{
throw new FormatException();
}
if (!DesktopEnvironment.TryGetControl(reference, out Control control))
{
throw new InvalidControlException();
}
FocusedControl = control;
}
break;
case CommandSyntax.Commands.Delete:
{
if (!TryGetReference(out ControlReference reference))
{
throw new FormatException();
}
if (!DesktopEnvironment.TryDelete(reference))
{
throw new InvalidControlException();
}
}
break;
default:
throw new InvalidCommandException();
}
return(output);
bool TryGetControl(out Control control)
{
control = null;
if (!Enum.TryParse(commandWords[1], ignoreCase: true, out ControlType type))
{
return(false);
}
switch (type)
{
case ControlType.SimpleRect:
// BBNEXT
control = new SimpleRectControl(FocusedControl, Color.Blue, id: _idGenerator.GenerateNextId())
{
Position = new Vector2i(ControlLayout.ScreenSize, ControlLayout.StickToRightOrBottom(30)),
Size = new Vector2i(ControlLayout.ScreenSize, 30)
};
break;
default:
return(false);
}
return(true);
}
bool TryGetReference(out ControlReference reference)
{
reference = null;
if (!Enum.TryParse(commandWords[1], ignoreCase: true, out ControlType type))
{
return(false);
}
if (!uint.TryParse(commandWords[2], out uint no))
{
return(false);
}
reference = new ControlReference(type, no);
return(true);
}
}