/// <summary>
/// Releases control of the runspace aquired via the <see cref="RunspaceHandle" />.
/// </summary>
/// <param name="runspaceHandle">
/// The <see cref="RunspaceHandle" /> representing the control to release.
/// </param>
internal void ReleaseRunspaceHandle(RunspaceHandle runspaceHandle)
{
if (_isDisposed)
{
return;
}
ReleaseRunspaceHandleImpl(runspaceHandle.IsReadLine);
if (runspaceHandle.IsReadLine && !_powerShellContext.IsCurrentRunspaceOutOfProcess())
{
ReleaseRunspaceHandleImpl(isReadLine: false);
}
}
/// <summary>
/// Releases control of the runspace aquired via the <see cref="RunspaceHandle" />.
/// </summary>
/// <param name="runspaceHandle">
/// The <see cref="RunspaceHandle" /> representing the control to release.
/// </param>
/// <returns>
/// A <see cref="Task" /> object representing the release of the
/// <see cref="RunspaceHandle" />.
/// </returns>
internal async Task ReleaseRunspaceHandleAsync(RunspaceHandle runspaceHandle)
{
if (_isDisposed)
{
return;
}
await ReleaseRunspaceHandleImplAsync(runspaceHandle.IsReadLine).ConfigureAwait(false);
if (runspaceHandle.IsReadLine && !_powerShellContext.IsCurrentRunspaceOutOfProcess())
{
await ReleaseRunspaceHandleImplAsync(isReadLine : false).ConfigureAwait(false);
}
}
/// <summary>
/// Invokes a custom ReadLine method that is similar to but more basic than PSReadLine.
/// This method should be used when PSReadLine is disabled, either by user settings or
/// unsupported PowerShell versions.
/// </summary>
/// <param name="isCommandLine">
/// Indicates whether ReadLine should act like a command line.
/// </param>
/// <param name="cancellationToken">
/// The cancellation token that will be checked prior to completing the returned task.
/// </param>
/// <returns>
/// A task object representing the asynchronus operation. The Result property on
/// the task object returns the user input string.
/// </returns>
internal async Task <string> InvokeLegacyReadLineAsync(bool isCommandLine, CancellationToken cancellationToken)
{
// TODO: Is inputBeforeCompletion used?
string inputBeforeCompletion = null;
string inputAfterCompletion = null;
CommandCompletion currentCompletion = null;
int historyIndex = -1;
Collection <PSObject> currentHistory = null;
StringBuilder inputLine = new StringBuilder();
int initialCursorCol = await ConsoleProxy.GetCursorLeftAsync(cancellationToken).ConfigureAwait(false);
int initialCursorRow = await ConsoleProxy.GetCursorTopAsync(cancellationToken).ConfigureAwait(false);
// TODO: Are these used?
int initialWindowLeft = Console.WindowLeft;
int initialWindowTop = Console.WindowTop;
int currentCursorIndex = 0;
Console.TreatControlCAsInput = true;
try
{
while (!cancellationToken.IsCancellationRequested)
{
ConsoleKeyInfo keyInfo = await ReadKeyAsync(cancellationToken).ConfigureAwait(false);
// Do final position calculation after the key has been pressed
// because the window could have been resized before then
int promptStartCol = initialCursorCol;
int promptStartRow = initialCursorRow;
int consoleWidth = Console.WindowWidth;
if ((int)keyInfo.Key == 3 ||
keyInfo.Key == ConsoleKey.C && keyInfo.Modifiers.HasFlag(ConsoleModifiers.Control))
{
throw new PipelineStoppedException();
}
else if (keyInfo.Key == ConsoleKey.Tab && isCommandLine)
{
if (currentCompletion == null)
{
inputBeforeCompletion = inputLine.ToString();
inputAfterCompletion = null;
// TODO: This logic should be moved to AstOperations or similar!
if (this.powerShellContext.IsDebuggerStopped)
{
PSCommand command = new PSCommand();
command.AddCommand("TabExpansion2");
command.AddParameter("InputScript", inputBeforeCompletion);
command.AddParameter("CursorColumn", currentCursorIndex);
command.AddParameter("Options", null);
var results = await this.powerShellContext
.ExecuteCommandAsync <CommandCompletion>(command, sendOutputToHost : false, sendErrorToHost : false)
.ConfigureAwait(false);
currentCompletion = results.FirstOrDefault();
}
else
{
using (RunspaceHandle runspaceHandle = await this.powerShellContext.GetRunspaceHandleAsync().ConfigureAwait(false))
using (PowerShell powerShell = PowerShell.Create())
{
powerShell.Runspace = runspaceHandle.Runspace;
currentCompletion =
CommandCompletion.CompleteInput(
inputBeforeCompletion,
currentCursorIndex,
null,
powerShell);
if (currentCompletion.CompletionMatches.Count > 0)
{
int replacementEndIndex =
currentCompletion.ReplacementIndex +
currentCompletion.ReplacementLength;
inputAfterCompletion =
inputLine.ToString(
replacementEndIndex,
inputLine.Length - replacementEndIndex);
}
else
{
currentCompletion = null;
}
}
}
}
CompletionResult completion =
currentCompletion?.GetNextResult(
!keyInfo.Modifiers.HasFlag(ConsoleModifiers.Shift));
if (completion != null)
{
currentCursorIndex =
this.InsertInput(
inputLine,
promptStartCol,
promptStartRow,
$"{completion.CompletionText}{inputAfterCompletion}",
currentCursorIndex,
insertIndex: currentCompletion.ReplacementIndex,
replaceLength: inputLine.Length - currentCompletion.ReplacementIndex,
finalCursorIndex: currentCompletion.ReplacementIndex + completion.CompletionText.Length);
}
}
else if (keyInfo.Key == ConsoleKey.LeftArrow)
{
currentCompletion = null;
if (currentCursorIndex > 0)
{
currentCursorIndex =
this.MoveCursorToIndex(
promptStartCol,
promptStartRow,
consoleWidth,
currentCursorIndex - 1);
}
}
else if (keyInfo.Key == ConsoleKey.Home)
{
currentCompletion = null;
currentCursorIndex =
this.MoveCursorToIndex(
promptStartCol,
promptStartRow,
consoleWidth,
0);
}
else if (keyInfo.Key == ConsoleKey.RightArrow)
{
currentCompletion = null;
if (currentCursorIndex < inputLine.Length)
{
currentCursorIndex =
this.MoveCursorToIndex(
promptStartCol,
promptStartRow,
consoleWidth,
currentCursorIndex + 1);
}
}
else if (keyInfo.Key == ConsoleKey.End)
{
currentCompletion = null;
currentCursorIndex =
this.MoveCursorToIndex(
promptStartCol,
promptStartRow,
consoleWidth,
inputLine.Length);
}
else if (keyInfo.Key == ConsoleKey.UpArrow && isCommandLine)
{
currentCompletion = null;
// TODO: Ctrl+Up should allow navigation in multi-line input
if (currentHistory == null)
{
historyIndex = -1;
PSCommand command = new PSCommand();
command.AddCommand("Get-History");
currentHistory = await this.powerShellContext.ExecuteCommandAsync <PSObject>(command, sendOutputToHost : false, sendErrorToHost : false)
.ConfigureAwait(false)
as Collection <PSObject>;
if (currentHistory != null)
{
historyIndex = currentHistory.Count;
}
}
if (currentHistory != null && currentHistory.Count > 0 && historyIndex > 0)
{
historyIndex--;
currentCursorIndex =
this.InsertInput(
inputLine,
promptStartCol,
promptStartRow,
(string)currentHistory[historyIndex].Properties["CommandLine"].Value,
currentCursorIndex,
insertIndex: 0,
replaceLength: inputLine.Length);
}
}
else if (keyInfo.Key == ConsoleKey.DownArrow && isCommandLine)
{
currentCompletion = null;
// The down arrow shouldn't cause history to be loaded,
// it's only for navigating an active history array
if (historyIndex > -1 && historyIndex < currentHistory.Count &&
currentHistory != null && currentHistory.Count > 0)
{
historyIndex++;
if (historyIndex < currentHistory.Count)
{
currentCursorIndex =
this.InsertInput(
inputLine,
promptStartCol,
promptStartRow,
(string)currentHistory[historyIndex].Properties["CommandLine"].Value,
currentCursorIndex,
insertIndex: 0,
replaceLength: inputLine.Length);
}
else if (historyIndex == currentHistory.Count)
{
currentCursorIndex =
this.InsertInput(
inputLine,
promptStartCol,
promptStartRow,
string.Empty,
currentCursorIndex,
insertIndex: 0,
replaceLength: inputLine.Length);
}
}
}
else if (keyInfo.Key == ConsoleKey.Escape)
{
currentCompletion = null;
historyIndex = currentHistory != null ? currentHistory.Count : -1;
currentCursorIndex =
this.InsertInput(
inputLine,
promptStartCol,
promptStartRow,
string.Empty,
currentCursorIndex,
insertIndex: 0,
replaceLength: inputLine.Length);
}
else if (keyInfo.Key == ConsoleKey.Backspace)
{
currentCompletion = null;
if (currentCursorIndex > 0)
{
currentCursorIndex =
this.InsertInput(
inputLine,
promptStartCol,
promptStartRow,
string.Empty,
currentCursorIndex,
insertIndex: currentCursorIndex - 1,
replaceLength: 1,
finalCursorIndex: currentCursorIndex - 1);
}
}
else if (keyInfo.Key == ConsoleKey.Delete)
{
currentCompletion = null;
if (currentCursorIndex < inputLine.Length)
{
currentCursorIndex =
this.InsertInput(
inputLine,
promptStartCol,
promptStartRow,
string.Empty,
currentCursorIndex,
replaceLength: 1,
finalCursorIndex: currentCursorIndex);
}
}
else if (keyInfo.Key == ConsoleKey.Enter)
{
string completedInput = inputLine.ToString();
currentCompletion = null;
currentHistory = null;
//if ((keyInfo.Modifiers & ConsoleModifiers.Shift) == ConsoleModifiers.Shift)
//{
// // TODO: Start a new line!
// continue;
//}
Parser.ParseInput(
completedInput,
out Token[] tokens,
out ParseError[] parseErrors);
