coc.nvim support

layers/plug/coc.vim

@@ -0,0 +1,35 @@
+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')
+    }
+})
+