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Pre-populate input buffer with default value to enable clearing to empty/null #327

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Copilot Feb 26, 2026
03cc732
Pre-populate input buffer with default value to allow clearing to emp…
Copilot Feb 26, 2026
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20 changes: 11 additions & 9 deletions Sharprompt/Forms/InputForm.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -14,21 +14,23 @@ public InputForm(InputOptions<T> options)

_options = options;

_defaultValue = Optional<T>.Create(options.DefaultValue);
var defaultText = options.DefaultValue?.ToString();

if (defaultText is not null)
{
foreach (var c in defaultText)
{
InputBuffer.Insert(c);
}
}
}

private readonly InputOptions<T> _options;
private readonly Optional<T> _defaultValue;

protected override void InputTemplate(OffscreenBuffer offscreenBuffer)
{
offscreenBuffer.WritePrompt(_options.Message);

if (_defaultValue.HasValue)
{
offscreenBuffer.WriteHint($"({_defaultValue.Value}) ");
}

if (InputBuffer.Length == 0 && !string.IsNullOrEmpty(_options.Placeholder))
{
offscreenBuffer.PushCursor();
Expand Down Expand Up @@ -56,7 +58,7 @@ protected override bool HandleEnter([NotNullWhen(true)] out T? result)
{
if (string.IsNullOrEmpty(input))
{
if (!TypeHelper<T>.IsNullable && !_defaultValue.HasValue)
if (!TypeHelper<T>.IsNullable)
{
SetError(Resource.Validation_Required);

Expand All @@ -65,7 +67,7 @@ protected override bool HandleEnter([NotNullWhen(true)] out T? result)
return false;
}

result = _defaultValue;
result = default;
}
else
{
Expand Down
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