vim9script

def CheckBackspace(): bool
    let col = col('.') - 1
    return !col || getline('.')[col - 1]  =~# '\s'
enddef

def ShowDocumentation()
    if CocAction('hasProvider', 'hover')
        call CocActionAsync('doHover')
    else
        call feedkeys('K', 'in')
    endif
enddef

final g:coc_global_extensions = ['coc-marketplace', 'coc-json', 'coc-vimlsp', 'coc-explorer', 'coc-git']

tui#core#plug#Regist('neoclide/coc.nvim', {
    branch: 'release',
    config: () => {
        set updatetime=300
        set signcolumn=yes

        inoremap <silent><expr> <TAB> coc#pum#visible() ? coc#pum#next(1) : CheckBackspace() ? "\<Tab>" : coc#refresh()
        inoremap <expr><S-TAB> coc#pum#visible() ? coc#pum#prev(1) : "\<C-h>"
        inoremap <silent><expr> <CR> coc#pum#visible() ? coc#pum#confirm() : "\<C-g>u\<CR>\<c-r>=coc#on_enter()\<CR>"
        # Use <c-space> to trigger completion
        inoremap <silent><expr> <c-@> coc#refresh()
        # Use K to show documentation in preview window
        nnoremap <silent> K :call ShowDocumentation()<CR>
        # Highlight the symbol and its references when holding the cursor
        autocmd CursorHold * silent call CocActionAsync('highlight')
    }
})