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• .. (вверх)
• [DIR] ..
• [FILE] events.js
• [FILE] incrementListIndex.js
• [FILE] paginator.js
• [FILE] readline.js
• [FILE] screen-manager.js
• [FILE] utils.js

Просмотр файла: incrementListIndex.js

function incrementListIndex(current, dir, opt) {
  const len = opt.choices.realLength;
  const shouldLoop = 'loop' in opt ? Boolean(opt.loop) : true;
  if (dir === 'up') {
    if (current > 0) {
      return current - 1;
    }
    return shouldLoop ? len - 1 : current;
  }
  if (dir === 'down') {
    if (current < len - 1) {
      return current + 1;
    }
    return shouldLoop ? 0 : current;
  }
  throw new Error('dir must be up or down');
}

module.exports = incrementListIndex;

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