Trix Autolink on paste

trix_autolink_on_paste.coffee

$editor = $("trix-editor")
$editor.on "paste", (e) ->
  pastedText = e.originalEvent.clipboardData?.getData?("Text")
  # we defer so we can get the cursor position after the pasting happens
  # otherwise trix returns the position before
  setTimeout( ->
    if pastedText and !!pastedText.match(/^(https?:\/\/(?:www\.|(?!www))[^\s\.]+\.[^\s]{2,}|www\.[^\s]+\.[^\s]{2,})$/ig)
      element = $editor.get(0)
      editor = element.editor
      currentText = editor.getDocument().toString()
      currentSelection = editor.getSelectedRange()
      # text up to the cursor position
      textWeAreInterestedIn = currentText.substring 0, currentSelection[0]
      # search for the start of the url
      startOfPastedText = textWeAreInterestedIn.lastIndexOf pastedText
      # add an undo entry so people can undo the autolinking
      editor.recordUndoEntry "Auto Link Paste"
      # select the url text
      editor.setSelectedRange [startOfPastedText, currentSelection[0]]
      # add a hyperlink to it
      editor.activateAttribute 'href', pastedText
      # go back to the original selection
      editor.setSelectedRange currentSelection
  , 0)