coc.nvim support

layers/plug/coc.vim

@@ -1,19 +1,11 @@
 vim9script
 
-def CheckBackspace(): bool
+export 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']
+g:coc_global_extensions = ['coc-marketplace', 'coc-json', 'coc-vimlsp', 'coc-explorer', 'coc-git']
 
 tui#core#plug#Regist('neoclide/coc.nvim', {
     branch: 'release',
@@ -27,7 +19,7 @@ tui#core#plug#Regist('neoclide/coc.nvim', {
         # 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>
+        nnoremap <silent><expr> K coc#rpc#request('hasProvider', ['hover']) ? coc#rpc#notify('doHover', []) : feedkeys('K', 'in')
         # Highlight the symbol and its references when holding the cursor
         autocmd CursorHold * silent call CocActionAsync('highlight')
     }