Smarter 'gcc' mapping (like Emacs "comment-dwim")

[tyru]

Currently gcc (by default, if <Plug>(caw:prefix) is not mapped by user)
is mapped to <Plug>(caw:hatpos:toggle).

caw.vim/plugin/caw.vim

Line 139 in 037fb8d

call s:map_user('c', 'i:toggle')

But I want gcc mapping to be smarter: Detect which comment action should current comment under cursor be handled by (except jump and input):

• hatpos
• zeropos
• dollarpos
• wrap
• box

And dispatch invoked method to detected action:

<Plug>(caw:{action}:{method})

Reference

About Emacs comment plugin (Japanese)

[tyru]

Update title and body.

Before: More intelligent comment action
After: 'gcc' Mapping: Detect <Plug>(caw:a:...) comment

[tyru]

Simplify comment.

[tyru]

dwim toggle

mode() ==# 'n':
  current cursor is Comment:
    detect comment type and uncomment
visualmode() ==# 'v':
  current range is all included within Coment:
    detect comment type and uncomment
  else:
    wrap comment (characterwise)
visualmode() ==# "\<C-v>":
  current range is all included within Coment:
    detect comment type and uncomment
  else:
    wrap comment (characterwise)

TODO: customizable?