Add cmdlinemenu api

autoload/SpaceVim/api/cmdlinemenu.vim

@@ -0,0 +1,63 @@
+let s:api = {}
+
+
+
+function! s:parseInput(char) abort
+  if a:char == 27
+    return ''
+  else
+    return a:char
+  endif
+endfunction
+
+function! s:parseItems(items) abort
+  let shortcuts = []
+  let items = {}
+  for item in a:items
+    if index(shortcuts, item[0:0]) == -1
+      let items[item[0:0]] = '(' . item[0:0] . ')' . item[1:]
+    endif
+  endfor
+  return items
+endfunction
+
+function! s:menu(items) abort
+  let saved_more = &more
+  set nomore
+  let items = s:parseItems(a:items)
+  let selected = values(items)[0][1:1]
+  let exit = 0
+  let indent = repeat(' ', 7)
+  while !exit
+    let menu = "Cmdline menu: Use j/k/enter and the shortcuts indicated\n"
+    for line in values(items)
+      if line[1:1] == selected
+        let menu .= indent . '>' . line . "\n"
+      else
+        let menu .= indent . ' ' . line . "\n"
+      endif
+    endfor
+    echo menu[:-2]
+    let nr = getchar()
+    if s:parseInput(nr) ==# '' || nr == 3
+      let exit = 1
+    elseif index(keys(items), nr2char(nr)) != -1
+      let selected = nr2char(nr)
+    elseif nr2char(nr) ==# 'j'
+      let selected = keys(items)[index(keys(items), selected) + 1]
+    elseif nr2char(nr) ==# 'k'
+      let selected = keys(items)[index(keys(items), selected) - 1]
+    endif
+    redraw
+  endwhile
+  let &more = saved_more
+endfunction
+
+let s:api['menu'] = function('s:menu')
+
+function! SpaceVim#api#cmdlinemenu#get() abort
+  return deepcopy(s:api)
+endfunction
+
+
+" vim:set et sw=2 cc=80: