private void UpdateCurrentParameter()
{
if (SubjectBuffer != null && TextView != null)
{
IREditorDocument document = REditorDocument.TryFromTextBuffer(SubjectBuffer);
if (document != null)
{
SnapshotPoint?p = REditorDocument.MapCaretPositionFromView(TextView);
if (p.HasValue)
{
document.EditorTree.InvokeWhenReady((o) => {
if (TextView != null)
{
// Session is still active
p = REditorDocument.MapCaretPositionFromView(TextView);
if (p.HasValue)
{
ComputeCurrentParameter(document.EditorTree.AstRoot, p.Value.Position);
}
}
}, null, this.GetType());
}
else
{
SignatureHelp.DismissSession(TextView);
}
}
}
}
private void OnCaretPositionChanged(object sender, CaretPositionChangedEventArgs e)
{
if (TextView != null)
{
if (SignatureHelper.IsSameSignatureContext(TextView, SubjectBuffer))
{
UpdateCurrentParameter();
}
else
{
SignatureHelp.DismissSession(TextView, retrigger: true);
}
}
else
{
e.TextView.Caret.PositionChanged -= OnCaretPositionChanged;
}
}
protected virtual void OnSubjectBufferChanged(object sender, TextContentChangedEventArgs e)
{
if (Session != null && e.Changes.Count > 0)
{
int start, oldLength, newLength;
TextUtility.CombineChanges(e, out start, out oldLength, out newLength);
int position = start + newLength;
if (position < _initialPosition)
{
SignatureHelp.DismissSession(TextView);
}
else
{
UpdateCurrentParameter();
}
}
}
private void UpdateCurrentParameter()
{
if (SubjectBuffer != null && TextView != null)
{
IREditorDocument document = REditorDocument.TryFromTextBuffer(SubjectBuffer);
if (document != null)
{
SnapshotPoint?p = REditorDocument.MapCaretPositionFromView(TextView);
if (p.HasValue)
{
document.EditorTree.EnsureTreeReady();
ComputeCurrentParameter(document.EditorTree.AstRoot, p.Value.Position);
}
else
{
SignatureHelp.DismissSession(TextView);
}
}
}
}
