Tabularize mappings for specific use cases

tabularize.vim

" Tabularize mappings
"
"   sa= -- align by equals
"   sa> -- align by "=>"
"
" and so on. Note that any character can be entered and the mappings will
" attempt to align by that, in the simplest way possible.
"
"   sa| -- equivalent to ":Tab/|"
"
" The custom Tabularize definitions (in the other file) need to be placed in
" after/plugin/tabularize.vim, so that they can be defined after the plugin is
" loaded.
"
" To compress multiple spaces, effectively un-tabularizing, use `s=`
"
nnoremap sa      :call <SID>TabularizeMapping(0)<cr>
xnoremap sa :<c-u>call <SID>TabularizeMapping(1)<cr>

nnoremap s= :call <SID>TabularizeReset()<cr>
xnoremap s= :call <SID>TabularizeReset()<cr>

function! s:TabularizeMapping(visual)
  echohl ModeMsg | echo "-- ALIGN -- "  | echohl None
  let align_type = nr2char(getchar())
  if align_type     == '='
    call s:Tabularize('equals', a:visual)
  elseif align_type == '>'
    call s:Tabularize('ruby_hash', a:visual)
  elseif align_type == ','
    call s:Tabularize('commas', a:visual)
  elseif align_type == ':'
    call s:Tabularize('colons', a:visual)
  elseif align_type == ' '
    call s:Tabularize('space', a:visual)
  else " just try aligning by the character
    call s:Tabularize('/'.align_type, a:visual)
  end
endfunction

function! s:Tabularize(command, visual)
  normal! mz

  let cmd = "Tabularize ".a:command
  if a:visual
    let cmd = "'<,'>" . cmd
  endif
  exec cmd
  echo

  normal! `z
endfunction

function! s:TabularizeReset()
  let original_cursor = getpos('.')

  s/\S\zs \+/ /g

  " Don't leave an entry in the history
  call histdel('search', -1)
  let @/ = histget('search', -1)

  call setpos('.', original_cursor)
endfunction

tabularize_definitions.vim

" This file goes in after/plugin/tabularize.vim

AddTabularPattern! equals    /^[^=]*\zs=/
AddTabularPattern! ruby_hash /^[^=>]*\zs=>/
AddTabularPattern! commas    /,\s*\zs\s/l0
AddTabularPattern! colons    /^[^:]*:\s*\zs\s/l0

" Not perfect, causes problems sometimes
AddTabularPipeline space / \+/
      \ map(a:lines, "substitute(v:val, ' \+', ' ', 'g')")
      \   | tabular#TabularizeStrings(a:lines, ' ', 'l0')