/// <summary>
/// Instructs the host to interrupt the currently running pipeline and start a new nested input loop.
/// An input loop is the cycle of prompt, input, and execute.
/// </summary>
public override void EnterNestedPrompt()
{
// push the last
IEditor keepNested = _nested;
try
{
//! Far used to crash: Test-CallStack-.ps1 \ suspend \ type exit + enter
//! This exception from Open() was removed, so don't try\catch all in here.
//! SVN tag 4.2.26
Interactive console = Interactive.Create(false);
_nested = console.Editor;
// Enter the modal editor. There are two ways to exit.
// 1) User exits the editor ([Esc]/[F10]). _nested should be this editor, not null.
// But PowerShell nested prompt is not yet exited, call 'exit', it triggers
// ExitNestedPrompt(), it sets _nested to null.
// 2) User types 'exit' in the editor. Then ExitNestedPrompt() is called first,
// it sets _nested to null and closes the editor. Control gets here with null
// _nested, so we do nothing but restoring the very first _nested.
_nested.Open(OpenMode.Modal);
// If _nested is not null then a user has closed the editor via UI, not by 'exit'.
// Thus, we have to exit the nested prompt. IsRunning check is added for V3 CTP2.
// It works fine in V2, too. Meaning: if there is no running pipeline (stepper)
// then there is nothing to exit, so do not exit. Exit nothing hangs in V3 CTP2.
if (_nested != null && A.Psf.IsRunning)
{
using (var ps = A.Psf.NewPowerShell())
ps.AddScript("exit").Invoke();
}
}
finally
{
// pop the last
_nested = keepNested;
}
}
