/// <summary>
/// Writes the prompt message and takes over the console until the user makes a selection or cancels via the escape key. This method
/// never returns a NoOp result.
/// </summary>
/// <param name="parentContext">context about the parent reader that we are assisting </param>
/// <returns>A selection or cancellation result, never a NoOp</returns>
public virtual ContextAssistResult DrawMenu(RichCommandLineContext parentContext)
{
try
{
DoSearchInternal(parentContext, null, true);
return(ContextAssistResult.CreateInsertResult(parentContext, SelectedValue.RichDisplayText));
}
catch (OperationCanceledException)
{
return(ContextAssistResult.Cancel);
}
}
/// <summary>
/// Creates a result that replaces the current token with the given selection.
/// </summary>
/// <param name="context">Context from the parent reader</param>
/// <param name="selection">The selection string to insert</param>
/// <returns>a result that replaces the current token with the given selection</returns>
public static ContextAssistResult CreateInsertResult(RichCommandLineContext context, ConsoleString selection)
{
context.RefreshTokenInfo();
var ret = new ContextAssistResult();
bool hasInserted = false;
var newBuffer = new List <ConsoleCharacter>();
foreach (var token in context.Tokens)
{
if (context.IsCursorOnToken(token))
{
if (string.IsNullOrWhiteSpace(token.Value))
{
newBuffer.AddRange(context.GetBufferSubstringFromToken(token));
ret.ConsoleRefreshLeftOffset = selection.Length;
}
else
{
var tokenOffset = context.BufferPosition - token.StartIndex;
ret.ConsoleRefreshLeftOffset = selection.Length - tokenOffset;
}
if (hasInserted == false)
{
hasInserted = true;
// cursor is on the current token
newBuffer.AddRange(selection);
}
}
else
{
// this token not be modified
newBuffer.AddRange(context.GetBufferSubstringFromToken(token));
}
}
if (hasInserted == false)
{
hasInserted = true;
// cursor is on the current token
newBuffer.AddRange(selection);
ret.ConsoleRefreshLeftOffset = selection.Length;
}
ret.StatusCode = ContextAssistResultStatusCode.Success;
ret.NewBuffer = newBuffer;
return(ret);
}
public void Handle(RichCommandLineContext context)
{
if (context.KeyPressed.Modifiers.HasFlag(ConsoleModifiers.Control) == false)
{
return;
}
context.Intercept = true;
context.RefreshTokenInfo();
if (ContextAssistProvider == null || ContextAssistProvider.CanAssist(context) == false)
{
return;
}
int left = context.Console.CursorLeft;
int top = context.Console.CursorTop;
ContextAssistResult result = ContextAssistResult.NoOp;
try
{
context.Console.WriteLine("\n");
result = ContextAssistProvider.DrawMenu(context);
while (result.IsTerminal == false)
{
var key = context.Console.ReadKey(true);
result = ContextAssistProvider.OnKeyboardInput(context, key);
}
}
finally
{
ContextAssistProvider.ClearMenu(context);
context.Console.CursorLeft = left;
context.Console.CursorTop = top;
}
if (result.StatusCode == ContextAssistResultStatusCode.Success)
{
context.ClearConsole();
context.Console.CursorLeft = left;
context.Console.CursorTop = top;
context.Buffer.Clear();
context.Buffer.AddRange(result.NewBuffer);
context.RefreshConsole(result.ConsoleRefreshLeftOffset, 0);
}
}
/// <summary>
/// Creates a result that replaces the current token with the given selection.
/// </summary>
/// <param name="context">Context from the parent reader</param>
/// <param name="selection">The selection string to insert</param>
/// <returns>a result that replaces the current token with the given selection</returns>
public static ContextAssistResult CreateInsertResult(RichCommandLineContext context, ConsoleString selection)
{
context.RefreshTokenInfo();
var ret = new ContextAssistResult();
bool hasInserted = false;
var newBuffer = new List<ConsoleCharacter>();
foreach (var token in context.Tokens)
{
if (context.IsCursorOnToken(token))
{
if (string.IsNullOrWhiteSpace(token.Value))
{
newBuffer.AddRange(context.GetBufferSubstringFromToken(token));
ret.ConsoleRefreshLeftOffset = selection.Length;
}
else
{
var tokenOffset = context.BufferPosition - token.StartIndex;
ret.ConsoleRefreshLeftOffset = selection.Length - tokenOffset;
}
if (hasInserted == false)
{
hasInserted = true;
// cursor is on the current token
newBuffer.AddRange(selection);
}
}
else
{
// this token not be modified
newBuffer.AddRange(context.GetBufferSubstringFromToken(token));
}
}
if (hasInserted == false)
{
hasInserted = true;
// cursor is on the current token
newBuffer.AddRange(selection);
ret.ConsoleRefreshLeftOffset = selection.Length;
}
ret.StatusCode = ContextAssistResultStatusCode.Success;
ret.NewBuffer = newBuffer;
return ret;
}
