private void ReadOneOrMoreKeys()
{
_readkeyStopwatch.Restart();
while (_console.KeyAvailable)
{
// _charMap is only guaranteed to accumulate input while KeyAvailable
// returns false. Make sure to check KeyAvailable after every ProcessKey call,
// and clear it in a loop in case the input was something like ^[[1 which can
// be 3, 2, or part of 1 key depending on timing.
_charMap.ProcessKey(_console.ReadKey());
while (_charMap.KeyAvailable)
{
var key = PSKeyInfo.FromConsoleKeyInfo(_charMap.ReadKey());
_lastNKeys.Enqueue(key);
_queuedKeys.Enqueue(key);
}
if (_readkeyStopwatch.ElapsedMilliseconds > 2)
{
// Don't spend too long in this loop if there are lots of queued keys
break;
}
}
if (_queuedKeys.Count == 0)
{
while (!_charMap.KeyAvailable)
{
// Don't want to block when there is an escape sequence being read.
if (_charMap.InEscapeSequence)
{
if (_console.KeyAvailable)
{
_charMap.ProcessKey(_console.ReadKey());
}
else
{
// We don't want to sleep for the whole escape timeout
// or the user will have a laggy console, but there's
// nothing to block on at this point either, so do a
// small sleep to yield the CPU while we're waiting
// to decide what the input was. This will only run
// if there are no keys waiting to be read.
Thread.Sleep(5);
}
}
else
{
_charMap.ProcessKey(_console.ReadKey());
}
}
while (_charMap.KeyAvailable)
{
var key = PSKeyInfo.FromConsoleKeyInfo(_charMap.ReadKey());
_lastNKeys.Enqueue(key);
_queuedKeys.Enqueue(key);
}
}
}
private void CheckEscapeInput(ICharMap map, ConsoleKeyInfo intended, ConsoleKeyInfo[] keys, bool inputOnly = false)
{
for (int i = 0; i < keys.Length; i++)
{
map.ProcessKey(keys[i]);
if (i < keys.Length - 1)
{
Assert.AreEqual(false, map.KeyAvailable);
}
}
if (inputOnly)
{
// Hack to make the map process escapes now.
var escapeTimeout = map.EscapeTimeout;
map.EscapeTimeout = 0;
bool unused = map.KeyAvailable;
map.EscapeTimeout = escapeTimeout;
return;
}
Assert.AreEqual(true, map.KeyAvailable);
var processedKey = map.ReadKey();
Assert.AreEqual(false, map.KeyAvailable);
Assert.AreEqual(intended, processedKey);
}
private void CheckPartialEscapeInput(ICharMap map, int expectedCount, ConsoleKeyInfo[] keys)
{
foreach (var key in keys)
{
map.ProcessKey(key);
Assert.AreEqual(false, map.KeyAvailable);
}
int keyCount = 0;
// Hack to make the map think the timeout is up.
var escapeTimeout = map.EscapeTimeout;
map.EscapeTimeout = 0;
while (map.KeyAvailable)
{
map.ReadKey();
keyCount++;
}
Assert.AreEqual(expectedCount, keyCount);
map.EscapeTimeout = escapeTimeout;
}