@kiwicom/orbit-components/es/Popover/helpers/calculateVerticalPosition.js

Orbit-components is a React component library which provides developers with the easiest possible way of building Kiwi.com’s products.

import _defineProperty from "@babel/runtime/helpers/esm/defineProperty";
import { POSITIONS } from "../consts";

var isInside = function isInside(p, canBe) {
  if (p === POSITIONS.TOP && canBe[p]) {
    return POSITIONS.TOP;
  }

  if (p === POSITIONS.BOTTOM && canBe[p]) {
    return POSITIONS.BOTTOM;
  }

  return false;
};

var calculateVerticalPosition = function calculateVerticalPosition(desiredPositions, pos) {
  var _canBeInWindow, _canBeInDocument;

  var canBeInWindow = (_canBeInWindow = {}, _defineProperty(_canBeInWindow, POSITIONS.TOP, pos.containerTop - pos.popoverHeight > pos.windowScrollTop), _defineProperty(_canBeInWindow, POSITIONS.BOTTOM, pos.containerTop - pos.windowScrollTop + pos.containerHeight + pos.popoverHeight < pos.windowHeight), _canBeInWindow);
  var canBeInDocument = (_canBeInDocument = {}, _defineProperty(_canBeInDocument, POSITIONS.TOP, pos.containerTop - pos.popoverHeight >= 0), _defineProperty(_canBeInDocument, POSITIONS.BOTTOM, pos.containerTop + pos.containerHeight + pos.popoverHeight < pos.documentHeight), _canBeInDocument);
  var possibleWindowPositions = desiredPositions.map(function (p) {
    return isInside(p, canBeInWindow);
  }).filter(function (p) {
    return typeof p === "string";
  });
  var possibleDocumentPositions = desiredPositions.map(function (p) {
    return isInside(p, canBeInDocument);
  }).filter(function (p) {
    return typeof p === "string";
  }); // ordering in POSITIONS const is important

  var posPosition = possibleWindowPositions[0] || possibleDocumentPositions[0];

  if (posPosition) {
    return posPosition;
  }

  return POSITIONS.BOTTOM;
};

export default calculateVerticalPosition;