A quick-and-dirty QuickCursor replacement in Hammerspoon

quickcursor.lua

-- Quick-and-dirty QuickCursor replacement
-- Inspired by https://github.com/tjluoma/edit-anywhere
function quickcursor()
  -- Get active application and window
  local window = hs.window.focusedWindow()
  local app = window:application()

  -- Check to see if we're in a valid text field
  -- (1) App is not invalid, (2) Paste is enabled
  -- If not, stop
  invalid_app = {
    ['Sublime Text'] = true,
  }
  paste = app:findMenuItem('Paste')
  if (invalid_app[app:name()]) or (not paste['enabled']) then
    hs.alert.show('Not a valid text field!')
    return
  end 

  -- Check to see if Cut is enabled
  -- If so, use current selection; otherwise, select all
  cut = app:findMenuItem('Cut')
  if not cut['enabled'] then
    hs.eventtap.keyStroke('cmd', 'a')
  end

  -- Copy selection
  hs.eventtap.keyStroke('cmd', 'c')

  -- Get copied text
  copied_text = hs.pasteboard.getContents()

  -- Write copied text to temp file
  local tempfilepath = os.getenv('HOME') .. '/.quick_cursor.txt'
  local tempfile = assert(io.open(tempfilepath, 'w'))
  tempfile:write(copied_text)
  tempfile:close()

  -- Open temp file in Sublime Text
  os.execute('open -a "Sublime Text" ' .. tempfilepath)  

  -- Get new Sublime Text window
  -- Need to pause briefly to capture Sublime Text window
  os.execute('sleep 1')
  local subl_window = hs.window.focusedWindow()

  -- Wait until Sublime Text window is destroyed
  local watcher = subl_window:newWatcher(
    function(win, event, watcher)
      -- Switch back to original window
      app:activate()
      window:focus()

      -- Put temp file into pasteboard
      local tempfile = assert(io.open(tempfilepath, 'r'))
      tempfilestr = tempfile:read('*all')
      tempfile:close()
      hs.pasteboard.setContents(tempfilestr)

      -- Paste temp file 
      hs.eventtap.keyStroke('cmd', 'v')

      -- Stop subscription
      watcher:stop()
    end
  )

  watcher:start({hs.window.watcher.elementDestroyed})
end

hs.hotkey.bind('ctrl', '.', quickcursor)