/// <summary>
/// Replace the current token in the input buffer with all possible
/// completions for it.
/// </summary>
public void ReplaceCurrentTokenWithAllCompletions()
{
if (TokenCompleter == null)
{
return;
}
var completions = TokenCompletionSet.Create(Buffer.Contents, Buffer.CursorIndex, TokenCompleter);
if (completions.Empty)
{
return;
}
var replacementText = string.Concat(completions.Completions.Select(completion => completion + " "));
var tokenStartIndex = completions.OriginalToken.InnerStartingOffset;
var tokenLength = completions.OriginalToken.InnerLength;
MoveConsoleAndBufferCursors(SeekOrigin.Begin, tokenStartIndex);
Buffer.Remove(tokenLength);
Buffer.Insert(replacementText);
SyncBufferToConsole(tokenStartIndex, replacementText.Length);
MoveConsoleAndBufferCursors(SeekOrigin.Begin, tokenStartIndex + replacementText.Length);
}
private void ReplaceCurrentTokenWithCompletion(bool reverseOrder, bool lastOperationWasCompletion)
{
if (TokenCompleter == null)
{
return;
}
// If we can't pull a completion from the cache, then generate new ones.
if (!lastOperationWasCompletion || (_lastCompletions == null))
{
_lastCompletions = TokenCompletionSet.Create(Buffer.Contents, Buffer.CursorIndex, TokenCompleter);
_completionEnumerator = CircularEnumerator.Create(_lastCompletions.Completions);
}
// Bail if no completions are available.
if (_lastCompletions.Empty)
{
return;
}
// Find the existing token length.
var existingTokenLength = _completionEnumerator.Started
? _completionEnumerator.GetCurrentItem().Length
: _lastCompletions.OriginalToken.InnerLength;
// Find the existing token start.
var existingTokenStart =
_lastCompletions.OriginalToken.InnerStartingOffset;
// Select the new completion.
if (reverseOrder)
{
_completionEnumerator.MovePrevious();
}
else
{
_completionEnumerator.MoveNext();
}
// Select the completion.
var completion = _completionEnumerator.GetCurrentItem();
// Replace the current token in the buffer with the completion.
MoveConsoleAndBufferCursors(SeekOrigin.Begin, existingTokenStart);
Buffer.Remove(existingTokenLength);
Buffer.Insert(completion);
// Rewrite the input text.
SyncBufferToConsole(
existingTokenStart,
Buffer.Length - existingTokenStart,
(existingTokenLength > completion.Length) ? existingTokenLength - completion.Length : 0);
MoveConsoleAndBufferCursors(SeekOrigin.Current, completion.Length);
}
/// <summary>
/// Displays all completions without modifying the input buffer.
/// </summary>
public void DisplayAllCompletions()
{
if (TokenCompleter == null)
{
return;
}
var completions = TokenCompletionSet.Create(Buffer.Contents, Buffer.CursorIndex, TokenCompleter);
if (completions.Empty)
{
return;
}
MoveConsoleCursorToNextLine();
DisplayInColumns(completions.Completions);
DisplayInputLine();
}