Move Line Up

script

// Get info on current line
const [current_line_position] = editor.getSelectedRange()
const [current_line_start, current_line_length] = editor.getSelectedLineRange()
const current_line_offset = current_line_position - current_line_start

// Check if current line == first line of draft
if (current_line_start > 0) {
  // Get current line's text
  let current_line_text = editor.getTextInRange(current_line_start, current_line_length)

  // Select previous line
  editor.setSelectedRange(current_line_start - 1, 0)

  // Get info on and text of previous line
  const [previous_line_start, previous_line_length] = editor.getSelectedLineRange()
  let previous_line_text = editor.getTextInRange(previous_line_start, previous_line_length)

  // If current line is last line of draft
  if (!current_line_text.endsWith('\n')) {
    // 1. Add line break to it
    current_line_text = current_line_text + '\n'

    if (previous_line_text.endsWith('\n')) {
      // 2. Remove line break from previous line
      // (to avoid adding empty line to end of draft)
      previous_line_text = previous_line_text.substring(0, previous_line_text.length - 1)
    }
  }

  // Swap content of both lines
  editor.setTextInRange(current_line_start, current_line_length, previous_line_text)
  editor.setTextInRange(previous_line_start, previous_line_length, current_line_text)

  // Reset cursor to original position within line
  editor.setSelectedRange(previous_line_start + current_line_offset, 0)
}