Add support for Coc.nvim.

sources_non_forked/coc.nvim/autoload/coc/snippet.vim

@@ -0,0 +1,146 @@
+scriptencoding utf-8
+let s:is_vim = !has('nvim')
+let s:map_next = 1
+let s:map_prev = 1
+let s:cmd_mapping = has('nvim') || has('patch-8.2.1978')
+
+function! coc#snippet#_select_mappings()
+  if !get(g:, 'coc_selectmode_mapping', 1)
+    return
+  endif
+
+  redir => mappings
+    silent! smap
+  redir END
+
+  for map in map(filter(split(mappings, '\n'),
+        \ "v:val !~# '^s' && v:val !~# '^\\a*\\s*<\\S\\+>'"),
+        \ "matchstr(v:val, '^\\a*\\s*\\zs\\S\\+')")
+    silent! execute 'sunmap' map
+    silent! execute 'sunmap <buffer>' map
+  endfor
+
+  " same behaviour of ultisnips
+  snoremap <silent> <BS> <c-g>c
+  snoremap <silent> <DEL> <c-g>c
+  snoremap <silent> <c-h> <c-g>c
+  snoremap <c-r> <c-g>"_c<c-r>
+endfunction
+
+function! coc#snippet#show_choices(lnum, col, len, values) abort
+  let m = mode()
+  call cursor(a:lnum, a:col + a:len)
+  if m !=# 'i'
+    call feedkeys("\<Esc>i", 'in')
+  endif
+  let changedtick = b:changedtick
+  call timer_start(20, { -> coc#_do_complete(a:col - 1, a:values, 0, changedtick)})
+  redraw
+endfunction
+
+function! coc#snippet#enable(...)
+  if get(b:, 'coc_snippet_active', 0) == 1
+    return
+  endif
+  let complete = get(a:, 1, 0)
+  let b:coc_snippet_active = 1
+  call coc#snippet#_select_mappings()
+  let nextkey = get(g:, 'coc_snippet_next', '<C-j>')
+  let prevkey = get(g:, 'coc_snippet_prev', '<C-k>')
+  if maparg(nextkey, 'i') =~# 'snippet'
+    let s:map_next = 0
+  endif
+  if maparg(prevkey, 'i') =~# 'snippet'
+    let s:map_prev = 0
+  endif
+  if !empty(nextkey)
+    if s:map_next
+      execute 'inoremap <buffer><nowait><silent>'.nextkey." <C-R>=coc#snippet#jump(1, ".complete.")<cr>"
+    endif
+    execute 'snoremap <buffer><nowait><silent>'.nextkey." <Esc>:call coc#snippet#jump(1, ".complete.")<cr>"
+  endif
+  if !empty(prevkey)
+    if s:map_prev
+      execute 'inoremap <buffer><nowait><silent>'.prevkey." <C-R>=coc#snippet#jump(0, ".complete.")<cr>"
+    endif
+    execute 'snoremap <buffer><nowait><silent>'.prevkey." <Esc>:call coc#snippet#jump(0, ".complete.")<cr>"
+  endif
+endfunction
+
+function! coc#snippet#prev() abort
+  call coc#rpc#request('snippetPrev', [])
+  return ''
+endfunction
+
+function! coc#snippet#next() abort
+  call coc#rpc#request('snippetNext', [])
+  return ''
+endfunction
+
+function! coc#snippet#jump(direction, complete) abort
+  if a:direction == 1 && a:complete && pumvisible()
+    let pre = exists('*complete_info') && complete_info()['selected'] == -1 ? "\<C-n>" : ''
+    call feedkeys(pre."\<C-y>", 'in')
+    return ''
+  endif
+  call coc#rpc#request(a:direction == 1 ? 'snippetNext' : 'snippetPrev', [])
+  return ''
+endfunction
+
+function! coc#snippet#disable()
+  if get(b:, 'coc_snippet_active', 0) == 0
+    return
+  endif
+  let b:coc_snippet_active = 0
+  let nextkey = get(g:, 'coc_snippet_next', '<C-j>')
+  let prevkey = get(g:, 'coc_snippet_prev', '<C-k>')
+  if s:map_next
+    silent! execute 'iunmap <buffer> <silent> '.nextkey
+  endif
+  if s:map_prev
+    silent! execute 'iunmap <buffer> <silent> '.prevkey
+  endif
+  silent! execute 'sunmap <buffer> <silent> '.prevkey
+  silent! execute 'sunmap <buffer> <silent> '.nextkey
+endfunction
+
+function! coc#snippet#select(position, text) abort
+  if pumvisible()
+    call coc#_cancel()
+  endif
+  if mode() == 's'
+    call feedkeys("\<Esc>", 'in')
+  endif
+  let cursor = coc#snippet#to_cursor(a:position)
+  call cursor([cursor[0], cursor[1] - (&selection !~# 'exclusive')])
+  let len = strchars(a:text) - (&selection !~# 'exclusive')
+  let cmd = ''
+  let cmd .= mode()[0] ==# 'i' ? "\<Esc>l" : ''
+  let cmd .= printf('v%s', len > 0 ? len . 'h' : '')
+  let cmd .= "o\<C-g>"
+  call feedkeys(cmd, 'n')
+endfunction
+
+function! coc#snippet#move(position) abort
+  let m = mode()
+  if m == 's'
+    call feedkeys("\<Esc>", 'in')
+  elseif pumvisible()
+    call coc#_cancel()
+  endif
+  let pos = coc#snippet#to_cursor(a:position)
+  call cursor(pos)
+  if pos[1] > strlen(getline(pos[0]))
+    startinsert!
+  else
+    startinsert
+  endif
+endfunction
+
+function! coc#snippet#to_cursor(position) abort
+  let line = getline(a:position.line + 1)
+  if line is v:null
+    return [a:position.line + 1, a:position.character + 1]
+  endif
+  return [a:position.line + 1, byteidx(line, a:position.character) + 1]
+endfunction