Move Line Down

script

// Get info on and text of current line
const [current_line_position] = editor.getSelectedRange()
const [current_line_start, current_line_length] = editor.getSelectedLineRange()
const cursor_line_offset = current_line_position - current_line_start
let cursor_line_start = 0
let current_line_text = editor.getTextInRange(current_line_start, current_line_length)

// Check if current line == last line of draft
if (current_line_text.length > 0 && current_line_text.endsWith('\n')) {
  // Select next line
  editor.setSelectedRange(current_line_start + current_line_length, 0)

  // Get info on and text of next line
  const [next_line_start, next_line_length] = editor.getSelectedLineRange()
  let next_line_text = editor.getTextInRange(next_line_start, next_line_length)

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

    if (current_line_text.endsWith('\n')) {
      // 2. Remove line break from current line
      current_line_text = current_line_text.substring(0, current_line_text.length - 1)
    }

    // Determine where "new" current line starts
    cursor_line_start = current_line_start + next_line_length + 1
  } else {
    cursor_line_start = current_line_start + next_line_length
  }

  // Swap content of both lines
  editor.setTextInRange(next_line_start, next_line_length, current_line_text)
  editor.setTextInRange(current_line_start, current_line_length, next_line_text)

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