react-bootstrap-typeahead/cjs/utils/getUpdatedActiveIndex.js

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = getUpdatedActiveIndex;
exports.isDisabledOption = isDisabledOption;
exports.skipDisabledOptions = skipDisabledOptions;

var _nodash = require("./nodash");

var _hasOwnProperty = _interopRequireDefault(require("./hasOwnProperty"));

function isDisabledOption(index, items) {
  var option = items[index];
  return !!option && !(0, _nodash.isString)(option) && (0, _hasOwnProperty["default"])(option, 'disabled');
}

function skipDisabledOptions(currentIndex, key, items) {
  var newIndex = currentIndex;

  while (isDisabledOption(newIndex, items)) {
    newIndex += key === 'ArrowUp' ? -1 : 1;
  }

  return newIndex;
}

function getUpdatedActiveIndex(currentIndex, key, items) {
  var newIndex = currentIndex; // Increment or decrement index based on user keystroke.

  newIndex += key === 'ArrowUp' ? -1 : 1; // Skip over any disabled options.

  newIndex = skipDisabledOptions(newIndex, key, items); // If we've reached the end, go back to the beginning or vice-versa.

  if (newIndex === items.length) {
    newIndex = -1;
  } else if (newIndex === -2) {
    newIndex = items.length - 1; // Skip over any disabled options.

    newIndex = skipDisabledOptions(newIndex, key, items);
  }

  return newIndex;
}