public virtual void Print(TextWriter writer, SwitchDescriptor[] switches)
{
using (var tw = new CommandTextWriter(writer))
{
this.Print(tw, switches);
}
}
public static object Parse(SwitchDescriptor descriptor, string arg)
{
if (descriptor.SwitchType.IsArray == true || typeof(System.Collections.IList).IsAssignableFrom(descriptor.SwitchType) == true)
{
return ParseArray(descriptor, arg);
}
else if (descriptor.SwitchType == typeof(bool))
{
return ParseBoolean(descriptor, arg);
}
else
{
return ParseDefault(descriptor, arg);
}
}
private static object ParseDefault(SwitchDescriptor descriptor, string arg)
{
var converter = descriptor.Converter;
if (converter.CanConvertFrom(typeof(string)) == false)
throw new NotSupportedException(string.Format(Resources.CannotConvert_Format, arg));
try
{
return converter.ConvertFrom(arg);
}
catch (Exception e)
{
throw new ArgumentException(Resources.InvalidArgumentType, descriptor.Name, e);
}
}
private static object ParseBoolean(SwitchDescriptor descriptor, string arg)
{
if (descriptor.SwitchType == typeof(bool) && descriptor.ArgSeparator == null)
{
return true;
}
return ParseDefault(descriptor, arg);
}
private static object ParseArray(SwitchDescriptor descriptor, string arg)
{
System.Collections.IList list;
if (descriptor.SwitchType.IsArray == true)
{
list = new System.Collections.ArrayList() as System.Collections.IList;
}
else
{
list = TypeDescriptor.CreateInstance(null, descriptor.SwitchType, null, null) as System.Collections.IList;
}
var itemType = GetItemType(descriptor.SwitchType);
if (itemType == null)
throw new NotSupportedException();
var segments = arg.Split(new char[] { CommandSettings.ItemSperator, });
try
{
var converter = TypeDescriptor.GetConverter(itemType);
foreach (var item in segments)
{
var s = item.Trim();
if (s.Length == 0)
continue;
var element = converter.ConvertFromString(s);
list.Add(element);
}
if (descriptor.SwitchType.IsArray == true)
{
var array = Array.CreateInstance(itemType, list.Count);
list.CopyTo(array, 0);
list = array as System.Collections.IList;
}
else
{
}
}
catch (Exception e)
{
throw new ArgumentException(Resources.InvalidArgumentType, descriptor.Name, e);
}
return list;
}
protected virtual bool IsSwitchVisible(SwitchDescriptor descriptor)
{
var attr = descriptor.Attributes.FirstOrDefault(item => item is BrowsableAttribute) as BrowsableAttribute;
if (attr == null)
return true;
return attr.Browsable;
}
private void ParseRequired(SwitchDescriptor switchDescriptor, ref string arguments)
{
var normalPattern = @"^((""[^""]*"")|(\S+))";
var match = Regex.Match(arguments, normalPattern);
if (match.Success == true)
{
this.args.Add(switchDescriptor, match.Value);
arguments = arguments.Substring(match.Length).Trim();
return;
}
throw new Exception();
}
private string GetString(SwitchDescriptor descriptor)
{
if (descriptor.Required == true)
{
var text = descriptor.Name;
if (descriptor.DefaultValue == DBNull.Value)
return string.Format("<{0}>", text);
return string.Format("<{0}='{1}'>", text, descriptor.DefaultValue ?? "null");
}
else
{
var patternItems = new string[] { descriptor.ShortNamePattern, descriptor.NamePattern, };
var patternText = string.Join(" | ", patternItems.Where(i => i != string.Empty));
return string.Format("[{0}]", patternText);
}
}
private void PrintSummary(CommandTextWriter writer, SwitchDescriptor[] switches)
{
if (this.Summary == string.Empty)
return;
writer.WriteLine(Resources.Summary);
writer.Indent++;
writer.WriteLine(this.Summary);
writer.Indent--;
writer.WriteLine();
}
private void PrintUsage(CommandTextWriter writer, SwitchDescriptor[] switches)
{
var query = from item in switches
orderby item.Required descending
select this.GetString(item);
var maxWidth = writer.Width - (writer.TabString.Length * writer.Indent);
var line = this.Name;
writer.WriteLine(Resources.Usage);
writer.Indent++;
foreach (var item in query)
{
if (line != string.Empty)
line += " ";
if (line.Length + item.Length >= maxWidth)
{
writer.WriteLine(line);
line = string.Empty.PadLeft(this.Name.Length + 1);
}
line += item;
}
writer.WriteLine(line);
writer.Indent--;
writer.WriteLine();
}
private void PrintRequirements(CommandTextWriter writer, SwitchDescriptor[] switches)
{
var items = switches.Where(i => i.Required == true).ToArray();
if (items.Any() == false)
return;
writer.WriteLine(Resources.Requirements);
writer.Indent++;
foreach (var item in items)
{
this.PrintRequirement(writer, item);
}
writer.Indent--;
writer.WriteLine();
}
private void PrintRequirement(CommandTextWriter writer, SwitchDescriptor descriptor)
{
writer.WriteLine(descriptor.Name);
if (descriptor.Description != string.Empty)
{
writer.Indent++;
writer.WriteMultiline(descriptor.Description);
writer.Indent--;
}
writer.WriteLine();
}
private void PrintOption(CommandTextWriter writer, SwitchDescriptor descriptor)
{
if (descriptor.ShortNamePattern != string.Empty)
writer.WriteLine(descriptor.ShortNamePattern);
if (descriptor.NamePattern != string.Empty)
writer.WriteLine(descriptor.NamePattern);
writer.Indent++;
writer.WriteMultiline(descriptor.Description);
writer.Indent--;
writer.WriteLine();
}
private void PrintDescription(CommandTextWriter writer, SwitchDescriptor[] switches)
{
if (this.Description == string.Empty)
return;
writer.WriteLine(Resources.Description);
writer.Indent++;
writer.WriteMultiline(this.Description);
writer.Indent--;
writer.WriteLine();
}
private void Print(CommandTextWriter writer, SwitchDescriptor[] switches)
{
this.PrintSummary(writer, switches);
this.PrintUsage(writer, switches);
this.PrintDescription(writer, switches);
this.PrintRequirements(writer, switches);
this.PrintOptions(writer, switches);
}