looking promising

home/nvim/ftplugin/markdown.vim

@@ -0,0 +1,43 @@
+setlocal spell
+setlocal textwidth=0
+setlocal syntax=rmd
+setlocal breakat-=@
+
+set makeprg=Rscript\ -e\ 'publishR::render(\\"%\\")'
+
+" nnoremap <localleader>oh :! xdg-open %:r.html<cr>
+nnoremap <localleader>oh :! chromium-browser %:r.html<cr>
+nnoremap <localleader>op :! xdg-open %:r.pdf<cr>
+nnoremap <localleader>ow :! xdg-open %:r.docx<cr>
+
+nnoremap <leader>t :TOC<cr>
+
+xnoremap <silent> ic :<c-u>call InnerChunk()<cr>
+onoremap <silent> ic :<c-u>call InnerChunk()<cr>
+xnoremap <silent> ac :<c-u>call OuterChunk()<cr>
+onoremap <silent> ac :<c-u>call OuterChunk()<cr>
+
+function OuterChunk()
+  let chunk = FindChunk()
+  execute "normal! " . chunk.start . "GV" . chunk.end . "G"
+endfunction
+
+function InnerChunk()
+  let chunk = FindChunk()
+  execute "normal! " . chunk.start . "GjV" . chunk.end . "Gk"
+endfunction
+
+function FindChunk()
+  let view = winsaveview()
+  normal! j
+  ?\v^ *```(\{.*\})=$
+  let startFence = line(".")
+  /\v^ *``` *
+  let endFence = line(".")
+  if startFence <= view.lnum && endFence >= view.lnum
+    return {"start": startFence, "end": endFence}
+  else
+    echoerr "Not inside a chunk"
+  endif
+  call winrestview(view)
+endfunction