add support for floating window and popup about vital.vim HOT 6 OPEN

let s:Popup = vital#vital#import('UI.Popup')

function! s:demo() abort
    let popup = s:Popup.new({
        \ 'max_width': 'auto',
        \ 'max_height': 'auto',
        \ 'min_height': 'auto',
        \ 'min_width': 'auto',
        \ 'height': 10,
        \ 'width': 10,
        \ 'border': 1,
        \ 'borderchars': '',
        \ 'contents': ['hello', 'world'],
        \ 'screenpos': [0, 0],
        \ 'directionalhint': 'bottomleft|bottomright|topleftedge|topcenter',
        \ 'focusable': 0,
        \ 'zindex': 0,
        \ 'drag': 0,
        \ 'scrollbar': 0,
        \ 'on_event': function('s:on_event'),
        \ })
    let winid = popup.get_winid()

    let [height, width] = popup.get_dimensions(id)
    call popup.set_dimensions(height, width)
    " or
    let height = popup.get_height()
    let width = popup.get_width()
    call popup.set_height(height)
    call popup.set_width(width)

    let isopen = popup.is_open()
    call popup.show(id)  " open popup
    call popup.hide(id)  " popup is hidden
    " or
    call popup.set_visibility(0)
    let isvisible = popup.get_visiblity()

    let contents = popup.get_contents()
    call popup.set_contents(contents)

    call popup.focus() " focus cursor

    call popup.close(id) " disposes and cleans up the popup
endfunction

function! s:on_event(id, event, data) abort
    let l:popup = s:Popup.get(a:id)

    let l:bufnr = a:data['bufnr']
    let l:popuid = a:id

    if a:event == 'open'
        " register autocmd for cursor move so can auto close the popup
    elseif a:event == 'close'
    elseif a:event == 'focus'
    elseif a:event == 'blur'
    elseif a:event == 'hidden'
    elseif a:event == 'scrolldown'
    elseif a:event == 'scrollup'
    endif
endfunction