在插入模式和正常模式下映射:w到Escape

Question

为了在Vim中节省时间，我想出了一个主意。在正常模式和插入模式下都将：w键绑定映射到Esc。然而，它只在插入模式下工作，而在正常模式下，当我打开一个新文件时，事情会变得一团糟。这是我在vimrc:中添加的内容

:inoremap <Esc> <Esc>:w<CR>
:nnoremap <Esc> :w<CR>

正如我所说的，第一个命令本身就很有效。但是添加第二个命令时，键会被打乱，尤其是当我打开一个新文件时。例如，尽管我在.virc:中明确添加了

map <up> <nop>
map <down> <nop>
map <left> <nop>
map <right> <nop>

通过为正常模式添加第二个命令，按下上下左键或右键可进入插入模式并添加A B C D。

你能帮我实现我的想法吗？

Answer 1

Vim FAQ 10.9上的信息可能很有用：

10.9. When I use my arrow keys, Vim changes modes, inserts weird characters
     in my document but doesn't move the cursor properly. What's going on?
There are a couple of things that could be going on: either you are using
Vim over a slow connection or Vim doesn't understand the key sequence that
your keyboard is generating.
If you are working over a slow connection (such as a 2400 bps modem), you
can try to set the 'timeout' or 'ttimeout' option. These options, combined
with the 'timeoutlen' and 'ttimeoutlen' options, may fix the problem.
The preceding procedure will not work correctly if your terminal sends key
codes that Vim does not understand. In this situation, your best option is
to map your key sequence to a matching cursor movement command and save
these mappings in a file. You can then ":source" the file whenever you work
from that terminal.
For more information, read 
    |'timeout'|
    |'ttimeout'|
    |'timeoutlen'|
    |'ttimeoutlen'|
    |:map|
    |vt100-cursor-keys|

来自:h vt100-cursor-keys:

Other terminals (e.g., vt100 and xterm) have cursor keys that send <Esc>OA,
<Esc>OB, etc. ...

因此，您的nnoremap可能会导致箭头键序列上的Esc保存文件，而其余字符将被单独解释，因此A将进入插入模式。

您可以考虑使用选项'autowriteall'，或者使用不同的映射来保存文件；这些定义见$VIMRUNTIMEmswin.vim:

" Use CTRL-S for saving, also in Insert mode
noremap <C-S>       :update<CR>
vnoremap <C-S>      <C-C>:update<CR>
inoremap <C-S>      <C-O>:update<CR>

:update命令类似于:w，但仅当文件已修改时才写入。

Answer 2

此外，您还可以使用

autocmd InsertLeave * write