/// <summary>
/// Called before character type is passed down to the core editor
/// along the controll chain. Gives language-specific controller
/// a chance to initiate different action and potentially 'eat'
/// the character. For example, in R typing 'abc[TAB] should bring
/// up intellisense list rather than actually insert the tab character.
/// </summary>
/// <returns>
/// True if character was handled and should not be
/// passed down to core editor or false otherwise.
/// </returns>
public override bool OnPreTypeChar(char typedCharacter)
{
// Allow tab to bring intellisense if
// a) REditorSettings.ShowCompletionOnTab true
// b) Position is at the end of a string so we bring completion for files
// c) There is no selection
if (typedCharacter == '\t' && !HasActiveCompletionSession && TextView.Selection.StreamSelectionSpan.Length == 0)
{
// if previous character is identifier character, bring completion list
SnapshotPoint?position = REditorDocument.MapCaretPositionFromView(TextView);
if (position.HasValue)
{
int pos = position.Value;
if (pos > 0 && pos <= position.Value.Snapshot.Length)
{
bool endOfIdentifier = RTokenizer.IsIdentifierCharacter(position.Value.Snapshot[pos - 1]);
bool showCompletion = endOfIdentifier && REditorSettings.ShowCompletionOnTab;
if (!showCompletion)
{
var document = REditorDocument.FromTextBuffer(position.Value.Snapshot.TextBuffer);
string directory;
showCompletion = RCompletionEngine.CanShowFileCompletion(document.EditorTree.AstRoot, pos, out directory);
}
if (showCompletion)
{
ShowCompletion(autoShownCompletion: false);
return(true); // eat the character
}
}
}
}
return(base.OnPreTypeChar(typedCharacter));
}
/// <summary>
/// Called before character type is passed down to the core editor
/// along the controll chain. Gives language-specific controller
/// a chance to initiate different action and potentially 'eat'
/// the character. For example, in R typing 'abc[TAB] should bring
/// up intellisense list rather than actually insert the tab character.
/// </summary>
/// <returns>
/// True if character was handled and should not be
/// passed down to core editor or false otherwise.
/// </returns>
public override bool OnPreTypeChar(char typedCharacter)
{
// Allow tab to bring intellisense if
// a) REditorSettings.ShowCompletionOnTab true
// b) Position is at the end of a string so we bring completion for files
// c) There is no selection
if (typedCharacter == '\t' && !HasActiveCompletionSession && TextView.Selection.StreamSelectionSpan.Length == 0)
{
// if previous character is identifier character, bring completion list
var position = TextView.GetCaretPosition(_textBuffer);
if (position.HasValue)
{
int pos = position.Value;
var document = position.Value.Snapshot.TextBuffer.GetEditorDocument <IREditorDocument>();
if (!document.IsPositionInComment(pos))
{
if (pos > 0 && pos <= position.Value.Snapshot.Length)
{
var endOfIdentifier = RTokenizer.IsIdentifierCharacter(position.Value.Snapshot[pos - 1]);
var showCompletion = endOfIdentifier && _settings.ShowCompletionOnTab;
if (!showCompletion)
{
showCompletion = RCompletionEngine.CanShowFileCompletion(document.EditorTree.AstRoot, pos, out string directory);
}
if (showCompletion)
{
ShowCompletion(autoShownCompletion: false);
return(true); // eat the character
}
}
}
}
}
else if (typedCharacter == '#')
{
if (TryInsertRoxygenBlock())
{
return(true);
}
}
return(base.OnPreTypeChar(typedCharacter));
}