readline.js 1.2 KB

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  1. import ansiEscapes from 'ansi-escapes';
  2. /**
  3. * Move cursor left by `x`
  4. * @param {Readline} rl - Readline instance
  5. * @param {Number} x - How far to go left (default to 1)
  6. */
  7. export const left = function (rl, x) {
  8. rl.output.write(ansiEscapes.cursorBackward(x));
  9. };
  10. /**
  11. * Move cursor right by `x`
  12. * @param {Readline} rl - Readline instance
  13. * @param {Number} x - How far to go left (default to 1)
  14. */
  15. export const right = function (rl, x) {
  16. rl.output.write(ansiEscapes.cursorForward(x));
  17. };
  18. /**
  19. * Move cursor up by `x`
  20. * @param {Readline} rl - Readline instance
  21. * @param {Number} x - How far to go up (default to 1)
  22. */
  23. export const up = function (rl, x) {
  24. rl.output.write(ansiEscapes.cursorUp(x));
  25. };
  26. /**
  27. * Move cursor down by `x`
  28. * @param {Readline} rl - Readline instance
  29. * @param {Number} x - How far to go down (default to 1)
  30. */
  31. export const down = function (rl, x) {
  32. rl.output.write(ansiEscapes.cursorDown(x));
  33. };
  34. /**
  35. * Clear current line
  36. * @param {Readline} rl - Readline instance
  37. * @param {Number} len - number of line to delete
  38. */
  39. export const clearLine = function (rl, len) {
  40. rl.output.write(ansiEscapes.eraseLines(len));
  41. };