internal void DoAutocomplete(bool forced)
{
if (!this.Menu.Enabled)
{
this.Menu.Close();
return;
}
visibleItems.Clear();
this.FocussedItemIndex = 0;
this.VerticalScroll.Value = 0;
//some magic for update scrolls
this.AutoScrollMinSize -= new Size(1, 0);
this.AutoScrollMinSize += new Size(1, 0);
//get fragment around caret
Range fragment = tb.Selection.GetFragment(this.Menu.SearchPattern);
var line = tb.GetLine(tb.Selection.FromLine).Text;
var column = tb.Selection.Start.iChar;
var text = fragment.Text;
var fragmentStart = fragment.Start.iChar;
System.Diagnostics.Debug.WriteLine($"Autocomplete: \"{text}\", {fragmentStart}, \"{line}\", {column}");
//calc screen point for popup menu
Point point = tb.PlaceToPoint(fragment.End);
point.Offset(2, tb.CharHeight);
//
if (forced || (text.Length >= this.Menu.MinFragmentLength &&
tb.Selection.IsEmpty && /*pops up only if selected range is empty*/
(tb.Selection.Start > fragment.Start || text.Length == 0 /*pops up only if caret is after first letter*/)))
{
//this.Menu.Fragment = fragment;
//this.Menu.FragmentStart = fragmentStart;
//this.Menu.EditLine = line;
//this.Menu.CursorColumn = column;
bool foundSelected = false;
//build popup menu
var items = new List <AutocompleteItem>();
foreach (var creator in autocompleteCreators)
{
foreach (var item in creator.CreateItems(tb.Selection.FromLine, tb.Selection.Start.iChar))
{
items.Add(item);
}
}
// Sorting: MatchWeight first. If MatchWeight is the same, compare the text.
items.Sort((f, s) => (f.MatchWeight == s.MatchWeight) ? String.Compare(f.Text, s.Text) : ((f.MatchWeight < s.MatchWeight) ? -1 : 1));
var maxItem = items.OrderByDescending(i => i.MatchWeight).FirstOrDefault();
if (maxItem != null)
{
foundSelected = true;
this.FocussedItemIndex = items.IndexOf(maxItem);
}
visibleItems.AddRange(items);
if (foundSelected)
{
this.AdjustScroll();
this.DoSelectedVisible();
}
}
//show popup menu
if (this.Count > 0)
{
if (!this.Menu.Visible)
{
CancelEventArgs args = new CancelEventArgs();
this.Menu.OnOpening(args);
if (!args.Cancel)
{
this.Menu.Show(tb, point);
}
}
this.DoSelectedVisible();
this.Invalidate();
}
else
{
this.Menu.Close();
}
}
