问题
The current mapping of my F5 key is:
imap <F5> <esc>:w\|!python %<CR>
Now I want that if I'm editing any python file (it will be better if it also recognizes file other than standard .py format like .pyd etc) then this mapping works as it is. But, if I edit a Java file it is mapped to something like:
imap <F5> <esc>:w\|!javac %<CR>
And when I'm editing any .c or .cpp file then F5 is mapped to this:
imap <F5> <esc>:w\|!make %<CR>
I have no idea how to proceed.
回答1:
There are problems with both given answer and original mapping. First of all, for buffer-local mappings there is *map <buffer>. Second, with <buffer> you don’t need to use BufEnter events and can instead use Filetype which are launched only once. Third, you have one error (2.), one potential problem (1.) and one place that can be optimized in original mappings:
- you should not be using
imap, it makes it very easy to accidentally break old mappings when adding new ones !python %will break once file contain a special symbol (space, semicolon, quot, dollar, …)- using
:updateinstead of:writeavoids useless writes in some cases
My variant:
autocmd Filetype c,cpp inoremap <buffer> <F5> <C-o>:update<Bar>execute '!make '.shellescape(expand('%:r'), 1)<CR>
autocmd Filetype python inoremap <buffer> <F5> <C-o>:update<Bar>execute '!python '.shellescape(@%, 1)<CR>
autocmd Filetype java inoremap <buffer> <F5> <C-o>:update<Bar>execute '!javac '.shellescape(@%, 1)<CR>
回答2:
Try this:
au BufEnter *.py map <F5> <esc>:w\|!python %<CR>
au BufEnter *.java imap <F5> <esc>:w\|!javac %<CR>
au BufEnter *.c, *.cpp imap <F5> <esc>:w\|!make %<CR>
I'm not 100% sure about the comma separated file types, trying to verify...
The vim docs are usually pretty nasty to try to figure out how to use commands, but these should help get you started:
:h BufEnter
:h :autocmd
Note: You may have to restart vim for these changes to overwrite the current autocommand groups.
来源：https://stackoverflow.com/questions/12030965/change-the-mapping-of-f5-on-the-basis-of-specific-file-type