private void GetExpressionHelp(string command, ref CommandHelp help)
{
int paramStart = command.IndexOf('(');
int paramEnd = command.IndexOf(')');
if (paramStart == -1)
{
if (!AppendDefinition(command, ref help))
{
string validType = help.ValidType;
help.PossibleCommands = _help.Keys.Where(
n => n.StartsWith(command, StringComparison.InvariantCultureIgnoreCase)
&& (validType == null || validType == GetReturnType(n))
).ToArray();
help.TabStart = help.Command.LastIndexOf(command, StringComparison.Ordinal);
}
}
else
{
var def = command.Substring(0, paramStart);
AppendDefinition(def, ref help);
FindParameterHelp(def, command.Substring(paramStart), ref help);
}
}
private bool AppendDefinition(string item, ref CommandHelp commandHelp)
{
if (_help.ContainsKey(item))
{
var i = _help[item];
commandHelp.Definitions += i.Definition + "\n";
commandHelp.Description = i.Description;
if (_options.ContainsKey(item))
{
commandHelp.Description += string.Format("\n\"{0}\"", _options[item].Property.GetValue(_options[item].Target, null));
commandHelp.ValidType = "";
}
return true;
}
return false;
}
private void FindParameterHelp(string command, string parameters, ref CommandHelp help)
{
int brackets = 0;
int paramStart = 1;
int paramIndex = 0;
for (int i = 0; i < parameters.Length; i++)
{
char c = parameters[i];
if (c == '(')
brackets++;
else if (c==')')
brackets--;
else if (c == ',' && brackets == 1)
{
paramStart = i + 1;
paramIndex++;
}
}
if (brackets > 0)
{
if (_commands.ContainsKey(command))
{
var p = _commands[command].Command.GetParameters();
if (p.Length > paramIndex)
help.ValidType = p[paramIndex].ParameterType.Name;
else
help.ValidType = "";
}
GetExpressionHelp(parameters.Substring(paramStart).Trim(), ref help);
}
}
/// <summary>
/// Gets intellisense-like help for a command.
/// </summary>
/// <param name="command"></param>
/// <returns></returns>
public CommandHelp GetHelp(string command)
{
CommandHelp help = new CommandHelp {Command = command, Definitions = "", Description = "", PossibleCommands = new string[0]};
int equals = command.IndexOf('=');
if (equals > 0)
{
string firstIdentifier = command.Substring(0, @equals).Trim();
AppendDefinition(firstIdentifier, ref help);
if (_options.ContainsKey(firstIdentifier))
help.ValidType = _options[firstIdentifier].Property.PropertyType.Name;
command = command.Substring(equals + 1);
}
//if (command.Length > 0)
GetExpressionHelp(command.Trim(), ref help);
return help;
}