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Render help text properly in two columns

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This commit is contained in:
Alexey Golub
2019-08-12 22:24:44 +03:00
parent b050ca4d67
commit 18429827df
2 changed files with 130 additions and 80 deletions
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4
CliFx/Internal/Extensions.cs
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@@ -10,7 +10,9 @@ namespace CliFx.Internal
{
public static bool IsNullOrWhiteSpace(this string s) => string.IsNullOrWhiteSpace(s);
public static string AsString(this char c) => new string(c, 1);
public static string Repeat(this char c, int count) => new string(c, count);
public static string AsString(this char c) => c.Repeat(1);
public static string JoinToString<T>(this IEnumerable<T> source, string separator) => string.Join(separator, source);

206
CliFx/Services/CommandHelpTextRenderer.cs
View File

@@ -10,55 +10,80 @@ namespace CliFx.Services
{
private readonly IConsole _console;
private int _position;
public CommandHelpTextRenderer(IConsole console)
{
_console = console;
}
private void Render(string text)
{
_console.Output.Write(text);
_position += text.Length;
}
private void RenderNewLine()
{
_console.Output.WriteLine();
_position = 0;
}
private void RenderIndent(int depth = 2) => Render(' '.Repeat(depth));
private void Render(string text, ConsoleColor foregroundColor, ConsoleColor backgroundColor = ConsoleColor.Black) =>
_console.WithColor(foregroundColor, backgroundColor, c => Render(text));
private void RenderDescription(CommandSchema commandSchema)
{
if (commandSchema.Description.IsNullOrWhiteSpace())
return;
_console.WithColor(ConsoleColor.Black, ConsoleColor.DarkGray, c =>
{
c.Output.WriteLine("Description");
});
// Header
Render("Description", ConsoleColor.Black, ConsoleColor.DarkGray);
RenderNewLine();
_console.Output.Write(" ");
_console.Output.Write(commandSchema.Description);
_console.Output.WriteLine();
// Description
RenderIndent();
Render(commandSchema.Description);
RenderNewLine();
_console.Output.WriteLine();
// Margin
RenderNewLine();
}
private void RenderUsage(ApplicationMetadata applicationMetadata, CommandSchema commandSchema, bool hasChildCommands)
private void RenderUsage(ApplicationMetadata applicationMetadata, CommandSchema commandSchema,
IReadOnlyList<CommandSchema> childCommandSchemas)
{
_console.WithColor(ConsoleColor.Black, ConsoleColor.DarkGray, c =>
{
c.Output.WriteLine("Usage");
});
// Header
Render("Usage", ConsoleColor.Black, ConsoleColor.DarkGray);
RenderNewLine();
_console.Output.Write(" ");
_console.Output.Write(applicationMetadata.ExecutableName);
_console.Output.Write(' ');
// Exe name
RenderIndent();
Render(applicationMetadata.ExecutableName);
// Command name
if (!commandSchema.IsDefault())
{
_console.Output.Write(commandSchema.Name);
_console.Output.Write(' ');
Render(" ");
Render(commandSchema.Name, ConsoleColor.Cyan);
}
if (hasChildCommands)
// Child command
if (childCommandSchemas.Any())
{
_console.Output.Write("[command]");
_console.Output.Write(' ');
Render(" ");
Render("[command]", ConsoleColor.Cyan);
}
_console.Output.Write("[options]");
_console.Output.WriteLine();
_console.Output.WriteLine();
// Options
Render(" ");
Render("[options]", ConsoleColor.White);
RenderNewLine();
// Margin
RenderNewLine();
}
private void RenderOptions(CommandSchema commandSchema)
@@ -69,50 +94,57 @@ namespace CliFx.Services
options.Add(new CommandOptionSchema(null, "help", 'h', null, false, "Shows help text."));
if (commandSchema.IsDefault())
options.Add(new CommandOptionSchema(null, "version", 'v', null, false, "Shows application version."));
options.Add(new CommandOptionSchema(null, "version", null, null, false, "Shows application version."));
_console.WithColor(ConsoleColor.Black, ConsoleColor.DarkGray, c =>
{
c.Output.WriteLine("Options");
});
// Header
Render("Options", ConsoleColor.Black, ConsoleColor.DarkGray);
RenderNewLine();
// Options
foreach (var option in options)
{
_console.Output.Write(" ");
if (!option.Name.IsNullOrWhiteSpace())
{
_console.WithColor(option.IsRequired ? ConsoleColor.White : ConsoleColor.Gray, c =>
{
c.Output.Write("--");
c.Output.Write(option.Name);
});
}
if (!option.Name.IsNullOrWhiteSpace() && option.ShortName != null)
{
_console.Output.Write('|');
}
RenderIndent();
// Short name
if (option.ShortName != null)
{
_console.WithColor(option.IsRequired ? ConsoleColor.White: ConsoleColor.Gray, c =>
{
c.Output.Write('-');
c.Output.Write(option.ShortName);
});
Render($"-{option.ShortName}", ConsoleColor.White);
}
// Delimiter
if (!option.Name.IsNullOrWhiteSpace() && option.ShortName != null)
{
Render("|");
}
// Name
if (!option.Name.IsNullOrWhiteSpace())
{
Render($"--{option.Name}", ConsoleColor.White);
}
// Description
if (!option.Description.IsNullOrWhiteSpace())
{
_console.Output.Write(" ");
_console.Output.Write(option.Description);
const int threshold = 20;
if (_position >= threshold)
{
RenderNewLine();
RenderIndent(threshold);
}
else
{
RenderIndent(threshold - _position);
}
Render(option.Description);
}
_console.Output.WriteLine();
RenderNewLine();
}
_console.Output.WriteLine();
RenderNewLine();
}
private void RenderChildCommands(ApplicationMetadata applicationMetadata, CommandSchema commandSchema,
@@ -121,44 +153,62 @@ namespace CliFx.Services
if (!childCommandSchemas.Any())
return;
_console.WithColor(ConsoleColor.Black, ConsoleColor.DarkGray, c =>
{
c.Output.WriteLine("Commands");
});
// Header
Render("Commands", ConsoleColor.Black, ConsoleColor.DarkGray);
RenderNewLine();
// Child commands
foreach (var childCommandSchema in childCommandSchemas)
{
_console.Output.Write(" ");
var relativeCommandName = GetRelativeCommandName(childCommandSchema, commandSchema);
_console.Output.Write(GetRelativeCommandName(childCommandSchema, commandSchema));
// Name
RenderIndent();
Render(relativeCommandName, ConsoleColor.Cyan);
// Description
if (!childCommandSchema.Description.IsNullOrWhiteSpace())
{
_console.Output.Write(" ");
_console.Output.Write(childCommandSchema.Description);
const int threshold = 20;
if (_position >= threshold)
{
RenderNewLine();
RenderIndent(threshold);
}
else
{
RenderIndent(threshold - _position);
}
Render(childCommandSchema.Description);
}
_console.Output.WriteLine();
RenderNewLine();
}
_console.Output.WriteLine();
// Margin
RenderNewLine();
// Child command help tip
_console.Output.Write("You can run `");
_console.Output.Write(applicationMetadata.ExecutableName);
_console.Output.Write(' ');
Render("You can run `");
Render(applicationMetadata.ExecutableName);
if (!commandSchema.IsDefault())
{
_console.Output.Write(commandSchema.Name);
_console.Output.Write(' ');
Render(" ");
Render(commandSchema.Name, ConsoleColor.Cyan);
}
_console.Output.Write("[command] --help` to show help on a specific command.");
Render(" ");
Render("[command]", ConsoleColor.Cyan);
_console.Output.WriteLine();
Render(" ");
Render("--help", ConsoleColor.White);
Render("` to show help on a specific command.");
RenderNewLine();
}
public void RenderHelpText(ApplicationMetadata applicationMetadata,
@@ -171,15 +221,13 @@ namespace CliFx.Services
// Render application info
if (matchingCommandSchema.IsDefault())
{
_console.Output.Write(applicationMetadata.Title);
_console.Output.Write(" v");
_console.Output.Write(applicationMetadata.VersionText);
_console.Output.WriteLine();
_console.Output.WriteLine();
Render($"{applicationMetadata.Title} v{applicationMetadata.VersionText}", ConsoleColor.Yellow);
RenderNewLine();
RenderNewLine();
}
RenderDescription(matchingCommandSchema);
RenderUsage(applicationMetadata, matchingCommandSchema, childCommandSchemas.Any());
RenderUsage(applicationMetadata, matchingCommandSchema, childCommandSchemas);
RenderOptions(matchingCommandSchema);
RenderChildCommands(applicationMetadata, matchingCommandSchema, childCommandSchemas);
}