Method [kTtyWrite]

lib/internal/readline/interface.js:1257–1553

(s, key)

  // Handle a write from the tty
  [kTtyWrite](s, key) {
    const previousKey = this[kPreviousKey];
    key ||= kEmptyObject;
    this[kPreviousKey] = key;
    let shouldResetPreviousCursorCols = true;

    if (!key.meta || key.name !== 'y') {
      // Reset yanking state unless we are doing yank pop.
      this[kYanking] = false;
    }

    // Activate or deactivate substring search.
    if (
      (key.name === 'up' || key.name === 'down') &&
      !key.ctrl &&
      !key.meta &&
      !key.shift
    ) {
      if (this[kSubstringSearch] === null && !this[kIsMultiline]) {
        this[kSubstringSearch] = StringPrototypeSlice(
          this.line,
          0,
          this.cursor,
        );
      }
    } else if (this[kSubstringSearch] !== null) {
      this[kSubstringSearch] = null;
      // Reset the index in case there's no match.
      if (this.history.length === this.historyIndex) {
        this.historyIndex = -1;
      }
    }

    // Undo & Redo
    if (typeof key.sequence === 'string') {
      switch (StringPrototypeCodePointAt(key.sequence, 0)) {
        case 0x1f:
          this[kUndo]();
          return;
        case 0x1e:
          this[kRedo]();
          return;
        default:
          break;
      }
    }

    // Ignore escape key, fixes
    // https://github.com/nodejs/node-v0.x-archive/issues/2876.
    if (key.name === 'escape') return;

    if (key.ctrl && key.shift) {
      /* Control and shift pressed */
      switch (key.name) {
        // TODO(BridgeAR): The transmitted escape sequence is `\b` and that is
        // identical to <ctrl>-h. It should have a unique escape sequence.
        case 'backspace':
          this[kDeleteLineLeft]();