/// <summary>
/// Initializes a new instance of the <see cref="SelectionPrompt{T}"/> class.
/// </summary>
public SelectionPrompt()
{
_tree = new ListPromptTree <T>(EqualityComparer <T> .Default);
}
public async Task <ListPromptState <T> > Show(
ListPromptTree <T> tree,
CancellationToken cancellationToken,
int requestedPageSize = 15)
{
if (tree is null)
{
throw new ArgumentNullException(nameof(tree));
}
if (!_console.Profile.Capabilities.Interactive)
{
throw new NotSupportedException(
"Cannot show selection prompt since the current " +
"terminal isn't interactive.");
}
if (!_console.Profile.Capabilities.Ansi)
{
throw new NotSupportedException(
"Cannot show selection prompt since the current " +
"terminal does not support ANSI escape sequences.");
}
var nodes = tree.Traverse().ToList();
var state = new ListPromptState <T>(nodes, _strategy.CalculatePageSize(_console, nodes.Count, requestedPageSize));
var hook = new ListPromptRenderHook <T>(_console, () => BuildRenderable(state));
using (new RenderHookScope(_console, hook))
{
_console.Cursor.Hide();
hook.Refresh();
while (true)
{
var rawKey = await _console.Input.ReadKeyAsync(true, cancellationToken).ConfigureAwait(false);
if (rawKey == null)
{
continue;
}
var key = rawKey.Value;
var result = _strategy.HandleInput(key, state);
if (result == ListPromptInputResult.Submit)
{
break;
}
if (state.Update(key.Key) || result == ListPromptInputResult.Refresh)
{
hook.Refresh();
}
}
}
hook.Clear();
_console.Cursor.Show();
return(state);
}
/// <summary>
/// Initializes a new instance of the <see cref="MultiSelectionPrompt{T}"/> class.
/// </summary>
/// <param name="comparer">
/// The <see cref="IEqualityComparer{T}"/> implementation to use when comparing items,
/// or <c>null</c> to use the default <see cref="IEqualityComparer{T}"/> for the type of the item.
/// </param>
public MultiSelectionPrompt(IEqualityComparer <T>?comparer = null)
{
Tree = new ListPromptTree <T>(comparer ?? EqualityComparer <T> .Default);
}
