<a href="foo"><img src="bar.jpg" alt="buzz"></a> → [](foo)

README.md

Usage

Installation

" add .vimrc
NeoBundle 'gist:844196/4c1dc9a89dd02ece4ebe', {
    \ 'name' : 'Img_to_markdown.vim',
    \ 'script_type' : 'plugin'
    \ }

Setting

" set keymap
nmap <silent><space>im <Plug>(img_to_markdown)

License

Do What The F*ck You Want To Public License Version 2 (WTFPL-2.0)

Img_to_markdown.vim

function! Img_to_markdown()
    let url = matchstr(getline("."), 'https\?:\/\/[^ >,;:"\[\]]*')
    let img = matchstr(getline("."), 'https\?:\/\/[^ >,;:"\[\]]*\(jpe\?g\|png\|gif\|bmp\)')
    let alt = matchstr(getline("."), 'alt="\zs.*\ze"')
    
    call setline(".", "[![" . alt . "](" . img . ")](" . url . ")")
endfunction

nnoremap <silent><Plug>(img_to_markdown) :<C-u>call Img_to_markdown()<CR>