async Task <string> IRCallbacks.ReadConsole(IReadOnlyList <IRContext> contexts, string prompt, int len, bool addToHistory, CancellationToken ct)
{
await TaskUtilities.SwitchToBackgroundThread();
if (!_initializedTcs.Task.IsCompleted)
{
await AfterHostStarted(_startupInfo);
}
var callback = _callback;
if (!addToHistory && callback != null)
{
return(await callback.ReadUserInput(prompt, len, ct));
}
var currentRequest = Interlocked.Exchange(ref _currentRequestSource, null);
_contexts = contexts;
Prompt = GetDefaultPrompt(prompt);
MaxLength = len;
var requestEventArgs = new RBeforeRequestEventArgs(contexts, Prompt, len, addToHistory);
BeforeRequest?.Invoke(this, requestEventArgs);
OnMutated();
currentRequest?.CompleteResponse();
string consoleInput = null;
do
{
ct.ThrowIfCancellationRequested();
try {
consoleInput = await ReadNextRequest(Prompt, len, ct);
} catch (OperationCanceledException ex) when(!(ex is CancelAllException))
{
// If request was canceled through means other than our token, it indicates the refusal of
// that requestor to respond to that particular prompt, so move on to the next requestor.
// If it was canceled through the token, then host itself is shutting down, and cancellation
// will be propagated on the entry to next iteration of this loop.
//
// If request was canceled due to CancelAllAsync, then we should not continue to process this
// ReadConsole call at all. Under normal conditions, ct will also be marked as canceled; but
// there is a potential for a race condition where we get a cancellation exception here, but
// ct is not marked as canceled yet. Explicitly checking for CancelAllException handles this.
}
} while (consoleInput == null);
// We only want to fire 'directory changed' events when it is initiated by the user
_processingChangeDirectoryCommand = consoleInput.StartsWithOrdinal("setwd");
consoleInput = consoleInput.EnsureLineBreak();
AfterRequest?.Invoke(this, new RAfterRequestEventArgs(contexts, Prompt, consoleInput, addToHistory, currentRequest?.IsVisible ?? false));
return(consoleInput);
}
public Task CancelAllAsync(CancellationToken сancellationToken = default(CancellationToken))
{
if (_inter != null)
{
AfterRequest?.Invoke(this, new RAfterRequestEventArgs(_inter.Contexts, Prompt, string.Empty, addToHistory: true, isVisible: true));
_inter = null;
}
return(Task.CompletedTask);
}
private ITraktModule RegisterModule(ITraktModule module)
{
module.BeforeRequest += (sender, e) => {
BeforeRequest?.Invoke(sender, e);
};
module.AfterRequest += (sender, e) => {
AfterRequest?.Invoke(sender, e);
};
return(module);
}
async Task <string> IRCallbacks.ReadConsole(IReadOnlyList <IRContext> contexts, string prompt, int len, bool addToHistory, bool isEvaluationAllowed, CancellationToken ct)
{
await TaskUtilities.SwitchToBackgroundThread();
var currentRequest = Interlocked.Exchange(ref _currentRequestSource, null);
_contexts = contexts;
Prompt = prompt;
MaxLength = len;
var requestEventArgs = new RRequestEventArgs(contexts, prompt, len, addToHistory);
BeforeRequest?.Invoke(this, requestEventArgs);
CancellationTokenSource evaluationCts;
Task evaluationTask;
if (isEvaluationAllowed)
{
evaluationCts = new CancellationTokenSource();
evaluationTask = EvaluateUntilCancelled(contexts, evaluationCts.Token, ct); // will raise Mutate
}
else
{
evaluationCts = null;
evaluationTask = Task.CompletedTask;
OnMutated();
}
currentRequest?.CompleteResponse();
string consoleInput = null;
do
{
ct.ThrowIfCancellationRequested();
try {
consoleInput = await ReadNextRequest(prompt, len, ct);
} catch (OperationCanceledException) {
// If request was canceled through means other than our token, it indicates the refusal of
// that requestor to respond to that particular prompt, so move on to the next requestor.
// If it was canceled through the token, then host itself is shutting down, and cancellation
// will be propagated on the entry to next iteration of this loop.
}
} while (consoleInput == null);
// If evaluation was allowed, cancel evaluation processing but await evaluation that is in progress
evaluationCts?.Cancel();
await evaluationTask;
AfterRequest?.Invoke(this, requestEventArgs);
return(consoleInput);
}
public Task CancelAllAsync()
{
if (_eval != null)
{
AfterRequest?.Invoke(this, new RRequestEventArgs(_eval.Contexts, Prompt, 4096, true));
_eval = null;
}
else if (_inter != null)
{
AfterRequest?.Invoke(this, new RRequestEventArgs(_inter.Contexts, Prompt, 4096, true));
_inter = null;
}
return(Task.CompletedTask);
}
public Task CancelAllAsync()
{
if (Evaluation != null)
{
AfterRequest?.Invoke(this, new RAfterRequestEventArgs(Evaluation.Contexts, Prompt, string.Empty, addToHistory: true, isVisible: true));
Evaluation = null;
}
else if (_inter != null)
{
AfterRequest?.Invoke(this, new RAfterRequestEventArgs(_inter.Contexts, Prompt, string.Empty, addToHistory: true, isVisible: true));
_inter = null;
}
return(Task.CompletedTask);
}