Add support for injecting custom javascript code to autocompleter menu events

[kaphula]

Just like you can hook events to regular Javascript objects such as onclick event to button, I would like to be able to execute custom code when certain events are happening in the autocompleter menu.

Let's say the autocompleter triggers and selects the first match from the list (only selects, not accepts). I would like to execute custom Javascript code when this event happens (the event being auto completer menu selecting active entry from its list of items).

If I understand correctly, it may be possible to execute custom Javascript code when you select and accept an item from the autocomplete list if CompletionItem's Command is defined properly (have not tested yet). But this only handles the event of accepting the selected item from the autoocomplete menu. Could we have similar events that allow injecting custom user code for opening the autocomplete menu, closing the autocomplete menu or selecting an item in the menu?