nvim/lua/neovim/plugsettings/coc.lua

return {
    {
      'neoclide/coc.nvim',
      config = function()

        G.opt.backup = false
        G.opt.writebackup = false
        G.opt.updatetime = 300
        G.opt.signcolumn = "yes"
        G.g.coc_global_extensions = {
          'coc-pyright',
          'coc-java',
          'coc-sh',
          'coc-sumneko-lua',

          'coc-word',
          'coc-lists',
          'coc-pairs',
          'coc-marketplace',

        }

        local opts = {
          silent = true,
          noremap = true,
          expr = true,
          replace_keycodes = false
        }

        G.map({

--          { "i", "<TAB>",   'coc#pum#visible() ? coc#pum#next(1) : v:lua.check_back_space() ? "<TAB>" : coc#refresh()', opts },
--          { "i", "<S-TAB>", [[coc#pum#visible() ? coc#pum#prev(1) : "\<C-h>"]], opts },

          { "i", "<cr>",    [[coc#pum#visible() ? coc#pum#confirm() : "\<C-g>u\<CR>\<c-r>=coc#on_enter()\<CR>"]], opts },

          { "n", "gd", "<Plug>(coc-definition)",      {silent = true} },
          { "n", "gy", "<Plug>(coc-type-definition)", {silent = true} },
          { "n", "gi", "<Plug>(coc-implementation)",  {silent = true} },
          { "n", "gr", "<Plug>(coc-references)",      {silent = true} },
          { "n", "<leader>rn", "<Plug>(coc-rename)",  {silent = true} },

          { "x", "<c-I>", "<Plug>(coc-format-selected)", {silent = true} },
          { "n", "<c-I>", "<Plug>(coc-format-selected)", {silent = true} },

        })
        local keyset = vim.keymap.set


        function _G.check_back_space()
            local col = G.fn.col('.') - 1
            return col == 0 or vim.fn.getline('.'):sub(col, col):match('%s') ~= nil
        end

        keyset("n", "[g", "<Plug>(coc-diagnostic-prev)", {silent = true})
        keyset("n", "]g", "<Plug>(coc-diagnostic-next)", {silent = true})

        vim.api.nvim_create_augroup("CocGroup", {})
        vim.api.nvim_create_autocmd("CursorHold", {
            group = "CocGroup",
            command = "silent call CocActionAsync('highlight')",
            desc = "Highlight symbol under cursor on CursorHold"
        })


        vim.api.nvim_create_autocmd("FileType", {
            group = "CocGroup",
            pattern = "typescript,json",
            command = "setl formatexpr=CocAction('formatSelected')",
            desc = "Setup formatexpr specified filetype(s)."
        })

        -- Update signature help on jump placeholder
        vim.api.nvim_create_autocmd("User", {
            group = "CocGroup",
            pattern = "CocJumpPlaceholder",
            command = "call CocActionAsync('showSignatureHelp')",
            desc = "Update signature help on jump placeholder"
        })

        -- Apply codeAction to the selected region
        -- Example: `<leader>aap` for current paragraph
        local opts = {silent = true, nowait = true}
        keyset("x", "<leader>a", "<Plug>(coc-codeaction-selected)", opts)
        keyset("n", "<leader>a", "<Plug>(coc-codeaction-selected)", opts)

        -- Remap keys for apply code actions at the cursor position.
        keyset("n", "<leader>ac", "<Plug>(coc-codeaction-cursor)", opts)
        -- Remap keys for apply source code actions for current file.
        keyset("n", "<leader>as", "<Plug>(coc-codeaction-source)", opts)
        -- Apply the most preferred quickfix action on the current line.
        keyset("n", "<leader>qf", "<Plug>(coc-fix-current)", opts)

        -- Remap keys for apply refactor code actions.
        keyset("n", "<leader>re", "<Plug>(coc-codeaction-refactor)", { silent = true })
        keyset("x", "<leader>r", "<Plug>(coc-codeaction-refactor-selected)", { silent = true })
        keyset("n", "<leader>r", "<Plug>(coc-codeaction-refactor-selected)", { silent = true })

        -- Run the Code Lens actions on the current line
        keyset("n", "<leader>cl", "<Plug>(coc-codelens-action)", opts)


        -- Map function and class text objects
        -- NOTE: Requires 'textDocument.documentSymbol' support from the language server
        keyset("x", "if", "<Plug>(coc-funcobj-i)", opts)
        keyset("o", "if", "<Plug>(coc-funcobj-i)", opts)
        keyset("x", "af", "<Plug>(coc-funcobj-a)", opts)
        keyset("o", "af", "<Plug>(coc-funcobj-a)", opts)
        keyset("x", "ic", "<Plug>(coc-classobj-i)", opts)
        keyset("o", "ic", "<Plug>(coc-classobj-i)", opts)
        keyset("x", "ac", "<Plug>(coc-classobj-a)", opts)
        keyset("o", "ac", "<Plug>(coc-classobj-a)", opts)


        -- Remap <C-f> and <C-b> to scroll float windows/popups
        ---@diagnostic disable-next-line: redefined-local
        local opts = {silent = true, nowait = true, expr = true}
        keyset("n", "<C-f>", 'coc#float#has_scroll() ? coc#float#scroll(1) : "<C-f>"', opts)
        keyset("n", "<C-b>", 'coc#float#has_scroll() ? coc#float#scroll(0) : "<C-b>"', opts)
        keyset("i", "<C-f>",
               'coc#float#has_scroll() ? "<c-r>=coc#float#scroll(1)<cr>" : "<Right>"', opts)
        keyset("i", "<C-b>",
               'coc#float#has_scroll() ? "<c-r>=coc#float#scroll(0)<cr>" : "<Left>"', opts)
        keyset("v", "<C-f>", 'coc#float#has_scroll() ? coc#float#scroll(1) : "<C-f>"', opts)
        keyset("v", "<C-b>", 'coc#float#has_scroll() ? coc#float#scroll(0) : "<C-b>"', opts)


        -- Use CTRL-S for selections ranges
        -- Requires 'textDocument/selectionRange' support of language server
        keyset("n", "<C-s>", "<Plug>(coc-range-select)", {silent = true})
        keyset("x", "<C-s>", "<Plug>(coc-range-select)", {silent = true})


        -- Add `:Format` command to format current buffer
        vim.api.nvim_create_user_command("Format", "call CocAction('format')", {})

        -- " Add `:Fold` command to fold current buffer
        vim.api.nvim_create_user_command("Fold", "call CocAction('fold', <f-args>)", {nargs = '?'})

        -- Add `:OR` command for organize imports of the current buffer
        vim.api.nvim_create_user_command("OR", "call CocActionAsync('runCommand', 'editor.action.organizeImport')", {})

        -- Add (Neo)Vim's native statusline support
        -- NOTE: Please see `:h coc-status` for integrations with external plugins that
        -- provide custom statusline: lightline.vim, vim-airline
        vim.opt.statusline:prepend("%{coc#status()}%{get(b:,'coc_current_function','')}")


        -- Mappings for CoCList
        -- code actions and coc stuff
        ---@diagnostic disable-next-line: redefined-local
        local opts = {silent = true, nowait = true}
        -- Show all diagnostics
        keyset("n", "<space>a", ":<C-u>CocList diagnostics<cr>", opts)
        -- Manage extensions
        keyset("n", "<space>e", ":<C-u>CocList extensions<cr>", opts)
        -- Show commands
        keyset("n", "<space>c", ":<C-u>CocList commands<cr>", opts)
        -- Find symbol of current document
        keyset("n", "<space>o", ":<C-u>CocList outline<cr>", opts)
        -- Search workspace symbols
        keyset("n", "<space>s", ":<C-u>CocList -I symbols<cr>", opts)
        -- Do default action for next item
        keyset("n", "<space>j", ":<C-u>CocNext<cr>", opts)
        -- Do default action for previous item
        keyset("n", "<space>k", ":<C-u>CocPrev<cr>", opts)
        -- Resume latest coc list
        keyset("n", "<space>p", ":<C-u>CocListResume<cr>", opts)
      end,
    },
}