Improve coc settings

.gitignore

@@ -1 +1,2 @@
 .netrwhist
+coc/extensions/db.json

coc-settings.json

@@ -1,10 +1,4 @@
 {
   "languageserver": {
-    "go": {
-      "command": "gopls",
-      "rootPatterns": ["go.mod"],
-      "trace.server": "verbose",
-      "filetypes": ["go"]
-    }
   }
 }

plugins.md

@@ -4,6 +4,7 @@ Git submodules are slow, so handle this manually.
 
 ## pack/acp/opt/
 
+* [coc.nvim](https://github.com/neoclide/coc.nvim)
 * [vim-pathogen](https://github.com/tpope/vim-pathogen)
 
 ## pack/acp/start/

vimrc

@@ -2,7 +2,7 @@
 " https://git.acperkins.com/acp/vimfiles
 "
 " Distributed under the VIM license.  See ':help license' for a copy.
-" Files under pack/ have their own licenses.
+" Files under pack/ and coc/extensions/node_modules/ have their own licenses.
 "
 " Includes parts from Tim Pope's «sensible.vim»
 " <https://github.com/tpope/vim-sensible>.
@@ -21,8 +21,6 @@ endif
 "=============================================================================
 " General settings for all builds.
 
-nmap <space> <leader>
-
 inoremap <C-BS> <C-W>
 inoremap <C-a> <C-O>^
 inoremap <C-e> <C-O>$
@@ -47,11 +45,13 @@ set autoindent
 set autoread
 set background=dark
 set backspace=indent,eol,start
+set cmdheight=1
 set colorcolumn=101
 set directory=$TEMP//,/tmp//,.
 set display+=lastline
 set encoding=utf-8
 set formatoptions-=t
+set hidden
 set history=1000
 set ignorecase
 set incsearch
@@ -61,8 +61,10 @@ set linebreak
 set list
 set listchars=tab:→·,trail:~,extends:>,precedes:<
 set modelines=0
+set nobackup
 set noexpandtab
 set nomodeline
+set nowritebackup
 set nrformats-=octal
 set numberwidth=8
 set relativenumber
@@ -116,7 +118,7 @@ if has("eval")
 	else
 		set t_Co=16
 	endif
-	colorscheme joker
+	colorscheme PaperColor
 	set termguicolors
 endif
 
@@ -164,7 +166,20 @@ else
 endif
 
 if !empty($VIMCOC) && has("patch-8.1.1719") && (executable("nodejs") || executable("node"))
+	if has("win32")
+		let g:coc_data_home = resolve("~/vimfiles/coc")
+	else
+		if has("nvim")
+			let g:coc_data_home = resolve("~/.config/nvim/coc")
+		else
+			let g:coc_data_home = resolve("~/.vim/coc")
+		endif
+	endif
 	packadd coc.nvim
+
+	" Give more space for displaying messages.
+	set cmdheight=2
+
 	" Use tab for trigger completion with characters ahead and navigate.
 	" NOTE: Use command ':verbose imap <tab>' to make sure tab is not mapped by
 	" other plugin before putting this into your config.
@@ -179,8 +194,127 @@ if !empty($VIMCOC) && has("patch-8.1.1719") && (executable("nodejs") || executab
 		return !col || getline('.')[col - 1]  =~# '\s'
 	endfunction
 
+	" Use <c-space> to trigger completion.
+	if has("nvim")
+		inoremap <silent><expr> <c-space> coc#refresh()
+	else
+		inoremap <silent><expr> <c-@> coc#refresh()
+	endif
+
+	" Make <CR> auto-select the first completion item and notify coc.nvim to
+	" format on enter, <cr> could be remapped by other vim plugin
 	inoremap <silent><expr> <cr> pumvisible() ? coc#_select_confirm()
 		\: "\<C-g>u\<CR>\<c-r>=coc#on_enter()\<CR>"
+
+	" Use `[g` and `]g` to navigate diagnostics
+	" Use `:CocDiagnostics` to get all diagnostics of current buffer in location list.
+	nmap <silent> [g <Plug>(coc-diagnostic-prev)
+	nmap <silent> ]g <Plug>(coc-diagnostic-next)
+
+	" GoTo code navigation.
+	nmap <silent> gd <Plug>(coc-definition)
+	nmap <silent> gy <Plug>(coc-type-definition)
+	nmap <silent> gi <Plug>(coc-implementation)
+	nmap <silent> gr <Plug>(coc-references)
+
+	" Use K to show documentation in preview window.
+	nnoremap <silent> K :call <SID>show_documentation()<CR>
+
+	function! s:show_documentation()
+		if (index(['vim','help'], &filetype) >= 0)
+			execute 'h '.expand('<cword>')
+		elseif (coc#rpc#ready())
+			call CocActionAsync('doHover')
+		else
+			execute '!' . &keywordprg . " " . expand('<cword>')
+		endif
+	endfunction
+
+	" Highlight the symbol and its references when holding the cursor.
+	autocmd CursorHold * silent call CocActionAsync('highlight')
+
+	" Symbol renaming.
+	nmap <leader>rn <Plug>(coc-rename)
+
+	" Formatting selected code.
+	xmap <leader>f  <Plug>(coc-format-selected)
+	nmap <leader>f  <Plug>(coc-format-selected)
+
+	augroup mygroup
+		autocmd!
+		" Setup formatexpr specified filetype(s).
+		autocmd FileType typescript,json setl formatexpr=CocAction('formatSelected')
+		" Update signature help on jump placeholder.
+		autocmd User CocJumpPlaceholder call CocActionAsync('showSignatureHelp')
+	augroup end
+
+	" Applying codeAction to the selected region.
+	" Example: `<leader>aap` for current paragraph
+	xmap <leader>a  <Plug>(coc-codeaction-selected)
+	nmap <leader>a  <Plug>(coc-codeaction-selected)
+
+	" Remap keys for applying codeAction to the current buffer.
+	nmap <leader>ac  <Plug>(coc-codeaction)
+	" Apply AutoFix to problem on the current line.
+	nmap <leader>qf  <Plug>(coc-fix-current)
+
+	" Map function and class text objects
+	" NOTE: Requires 'textDocument.documentSymbol' support from the language server.
+	xmap if <Plug>(coc-funcobj-i)
+	omap if <Plug>(coc-funcobj-i)
+	xmap af <Plug>(coc-funcobj-a)
+	omap af <Plug>(coc-funcobj-a)
+	xmap ic <Plug>(coc-classobj-i)
+	omap ic <Plug>(coc-classobj-i)
+	xmap ac <Plug>(coc-classobj-a)
+	omap ac <Plug>(coc-classobj-a)
+
+	" Remap <C-f> and <C-b> for scroll float windows/popups.
+	if has("nvim-0.4.0") || has("patch-8.2.0750")
+		nnoremap <silent><nowait><expr> <C-f> coc#float#has_scroll() ? coc#float#scroll(1) : "\<C-f>"
+		nnoremap <silent><nowait><expr> <C-b> coc#float#has_scroll() ? coc#float#scroll(0) : "\<C-b>"
+		inoremap <silent><nowait><expr> <C-f> coc#float#has_scroll() ? "\<c-r>=coc#float#scroll(1)\<cr>" : "\<Right>"
+		inoremap <silent><nowait><expr> <C-b> coc#float#has_scroll() ? "\<c-r>=coc#float#scroll(0)\<cr>" : "\<Left>"
+		vnoremap <silent><nowait><expr> <C-f> coc#float#has_scroll() ? coc#float#scroll(1) : "\<C-f>"
+		vnoremap <silent><nowait><expr> <C-b> coc#float#has_scroll() ? coc#float#scroll(0) : "\<C-b>"
+	endif
+
+	" Use CTRL-S for selections ranges.
+	" Requires 'textDocument/selectionRange' support of language server.
+	nmap <silent> <C-s> <Plug>(coc-range-select)
+	xmap <silent> <C-s> <Plug>(coc-range-select)
+
+	" Add `:Format` command to format current buffer.
+	command! -nargs=0 Format :call CocAction('format')
+
+	" Add `:Fold` command to fold current buffer.
+	command! -nargs=? Fold :call     CocAction('fold', <f-args>)
+
+	" Add `:OR` command for organize imports of the current buffer.
+	command! -nargs=0 OR   :call     CocAction('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.
+	set statusline^=%f\ %{coc#status()}%{get(b:,'coc_current_function','')}%=%l,%c%V\ %P
+
+	" Mappings for CoCList
+	" Show all diagnostics.
+	nnoremap <silent><nowait> <space>a  :<C-u>CocList diagnostics<cr>
+	" Manage extensions.
+	nnoremap <silent><nowait> <space>e  :<C-u>CocList extensions<cr>
+	" Show commands.
+	nnoremap <silent><nowait> <space>c  :<C-u>CocList commands<cr>
+	" Find symbol of current document.
+	nnoremap <silent><nowait> <space>o  :<C-u>CocList outline<cr>
+	" Search workspace symbols.
+	nnoremap <silent><nowait> <space>s  :<C-u>CocList -I symbols<cr>
+	" Do default action for next item.
+	nnoremap <silent><nowait> <space>j  :<C-u>CocNext<CR>
+	" Do default action for previous item.
+	nnoremap <silent><nowait> <space>k  :<C-u>CocPrev<CR>
+	" Resume latest coc list.
+	nnoremap <silent><nowait> <space>p  :<C-u>CocListResume<CR>
 endif
 
 if has("printer")