// TODO: BRING THIS BACK
/// <summary>
/// Gets completions for the symbol found in the Ast at
/// the given file offset.
/// </summary>
/// <param name="scriptAst">
/// The Ast which will be traversed to find a completable symbol.
/// </param>
/// <param name="currentTokens">
/// The array of tokens corresponding to the scriptAst parameter.
/// </param>
/// <param name="fileOffset">
/// The 1-based file offset at which a symbol will be located.
/// </param>
/// <param name="powerShellContext">
/// The PowerShellContext to use for gathering completions.
/// </param>
/// <param name="logger">An ILogger implementation used for writing log messages.</param>
/// <param name="cancellationToken">
/// A CancellationToken to cancel completion requests.
/// </param>
/// <returns>
/// A CommandCompletion instance that contains completions for the
/// symbol at the given offset.
/// </returns>
public static async Task <CommandCompletion> GetCompletionsAsync(
Ast scriptAst,
Token[] currentTokens,
int fileOffset,
PowerShellContextService powerShellContext,
ILogger logger,
CancellationToken cancellationToken)
{
if (!s_completionHandle.Wait(0))
{
return(null);
}
try
{
IScriptPosition cursorPosition = (IScriptPosition)s_extentCloneWithNewOffset.Invoke(
scriptAst.Extent.StartScriptPosition,
new object[] { fileOffset });
logger.LogTrace(
string.Format(
"Getting completions at offset {0} (line: {1}, column: {2})",
fileOffset,
cursorPosition.LineNumber,
cursorPosition.ColumnNumber));
if (!powerShellContext.IsAvailable)
{
return(null);
}
var stopwatch = new Stopwatch();
// If the current runspace is out of process we can use
// CommandCompletion.CompleteInput because PSReadLine won't be taking up the
// main runspace.
if (powerShellContext.IsCurrentRunspaceOutOfProcess())
{
using (RunspaceHandle runspaceHandle = await powerShellContext.GetRunspaceHandleAsync(cancellationToken))
using (System.Management.Automation.PowerShell powerShell = System.Management.Automation.PowerShell.Create())
{
powerShell.Runspace = runspaceHandle.Runspace;
stopwatch.Start();
try
{
return(CommandCompletion.CompleteInput(
scriptAst,
currentTokens,
cursorPosition,
options: null,
powershell: powerShell));
}
finally
{
stopwatch.Stop();
logger.LogTrace($"IntelliSense completed in {stopwatch.ElapsedMilliseconds}ms.");
}
}
}
CommandCompletion commandCompletion = null;
await powerShellContext.InvokeOnPipelineThreadAsync(
pwsh =>
{
stopwatch.Start();
commandCompletion = CommandCompletion.CompleteInput(
scriptAst,
currentTokens,
cursorPosition,
options: null,
powershell: pwsh);
});
stopwatch.Stop();
logger.LogTrace($"IntelliSense completed in {stopwatch.ElapsedMilliseconds}ms.");
return(commandCompletion);
}
finally
{
s_completionHandle.Release();
}
}