feat(recordkey): add recordkey plugin

autoload/SpaceVim/mapping/space.vim

@@ -701,6 +701,10 @@ function! SpaceVim#mapping#space#init() abort
   else
     call SpaceVim#custom#SPC('nnoremap', ['a', 'o'], 'call SpaceVim#plugins#todo#list()', 'open-todo-manager', 1)
   endif
+
+  if has('nvim-0.9.5')
+    call SpaceVim#custom#SPC('nnoremap', ['a', 'r'], 'lua require("spacevim.plugin.record-key").toggle()', 'toggle-record-keyboard', 1)
+  endif
 endfunction
 
 function! SpaceVim#mapping#space#def(m, keys, cmd, desc, is_cmd, ...) abort

lua/spacevim/plugin/record-key.lua

@@ -0,0 +1,78 @@
+--=============================================================================
+-- record-key.lua --- record key for nvim
+-- Copyright (c) 2016-2022 Wang Shidong & Contributors
+-- Author: Wang Shidong < wsdjeg@outlook.com >
+-- URL: https://spacevim.org
+-- License: GPLv3
+--=============================================================================
+
+local M = {}
+
+local timeout = 3000
+
+local max_count = 5
+
+local keys = {}
+
+local pos = 0
+
+local enabled = false
+local ns_is = vim.api.nvim_create_namespace('record-key')
+
+local function show_key(key)
+  local buf = vim.api.nvim_create_buf(false, true)
+  vim.api.nvim_buf_set_lines(buf, 0, -1, false, { string.format('%8s', key) })
+
+  local winid = vim.api.nvim_open_win(buf, false, {
+    relative = 'editor',
+    width = 8,
+    height = 1,
+    row = vim.o.lines - 10 - pos * 3,
+    col = vim.o.columns - 25,
+    focusable = false,
+    noautocmd = true,
+    border = "single"
+  })
+  vim.fn.setbufvar(buf, '&number', 0)
+  vim.fn.setbufvar(buf, '&relativenumber', 0)
+  vim.fn.setbufvar(buf, '&cursorline', 0)
+  vim.fn.setbufvar(buf, '&bufhidden', 'wipe')
+  vim.api.nvim_win_set_option(winid, 'winhighlight', 'NormalFloat:Normal')
+  vim.fn.timer_start(timeout, function()
+    if vim.api.nvim_win_is_valid(winid) then
+      vim.api.nvim_win_close(winid, true)
+    end
+  end, { ['repeat'] = 1 })
+end
+
+local function display()
+  pos = 0
+  if #keys > max_count then
+    for i = 1, max_count, 1 do
+      show_key(keys[#keys - i + 1])
+      pos = pos + 1
+    end
+  else
+    for i = 1, #keys, 1 do
+      show_key(keys[#keys - i + 1])
+      pos = pos + 1
+    end
+  end
+end
+
+local function on_key(key)
+  table.insert(keys, key)
+  display()
+end
+
+function M.toggle()
+  if enabled then
+    vim.on_key(nil, ns_is)
+    enabled = false
+  else
+    vim.on_key(on_key, ns_is)
+    enabled = true
+  end
+end
+
+return M