In asyncomplete v2 I now provide custom filter function when a character is inputed. Now if the user open file complete using ctrl-x ctrl-f the pum opens but because because of asyncomplete it takes over pum. Can we have an autocmd event that notifies autocomplete plugins that the popup was opened due toctrl-x ctrl-f so we can ignore processing our code and let vim handle the autocomplete?

A bit more info on this can be found at prabirshrestha/asyncomplete.vim#124 (comment)

autocmd CompleteOpen * call s:complete_open()
autocmd CompleteDone * call s:complete_done()

function! s:complete_open() abort
    let s:complete_type = v:event['complete_type']
endfunction

function! s:complete_done() abort
    let s:complete_type = ''
endfunction

function! s:on_changed() abort
    if s:complete_type == 'ctrl-x ctrl-f' || s:complete_type == 'ctrl-x ctrl-o' | return | endif
    " .... asyncomplete s:on_change code goes here
endfunction

Of if anyone has a better way to solve this issue without adding autocmd events let me know.

//cc @mattn Who filed the bug.