Auto-completing using Scintilla wrapper creates 2 separate Undo events #31
Description
Using the Scintilla Wrapper, during the completion of the auto-complete cycle, 2 separate Undo events are created on the scintilla undo stack.
This leads to a slightly strange experience when undoing an auto-complete. From and end users point of view, if they undo an auto-complete, the 'auto-completed' characters should be removed, leaving the initially types characters alone.
What we see is the entire word is removed on the first undo, and then on a second undo must be invoked for the initially typed characters to be restored.
I believe the issue is in the 'SelectedText' property of the ScintillaWrapper class , where two separate scintilla text methods are used to first clear the typed characters, and then second to insert the full match text.
If these 2 calls were surround by a call to 'BeginUndoAction' and a call to 'EndUndoAction' on the scintilla control, this would resolve the issue.