react-overlays/esm/ModalManager.js

import addClass from 'dom-helpers/addClass';
import removeClass from 'dom-helpers/removeClass';
import css from 'dom-helpers/css';
import getScrollbarSize from 'dom-helpers/scrollbarSize';
import isOverflowing from './isOverflowing';
import { ariaHidden, hideSiblings, showSiblings } from './manageAriaHidden';

function findIndexOf(arr, cb) {
  var idx = -1;
  arr.some(function (d, i) {
    if (cb(d, i)) {
      idx = i;
      return true;
    }

    return false;
  });
  return idx;
}

/**
 * Proper state management for containers and the modals in those containers.
 *
 * @internal Used by the Modal to ensure proper styling of containers.
 */
var ModalManager = /*#__PURE__*/function () {
  function ModalManager(_temp) {
    var _ref = _temp === void 0 ? {} : _temp,
        _ref$hideSiblingNodes = _ref.hideSiblingNodes,
        hideSiblingNodes = _ref$hideSiblingNodes === void 0 ? true : _ref$hideSiblingNodes,
        _ref$handleContainerO = _ref.handleContainerOverflow,
        handleContainerOverflow = _ref$handleContainerO === void 0 ? true : _ref$handleContainerO;

    this.hideSiblingNodes = void 0;
    this.handleContainerOverflow = void 0;
    this.modals = void 0;
    this.containers = void 0;
    this.data = void 0;
    this.scrollbarSize = void 0;
    this.hideSiblingNodes = hideSiblingNodes;
    this.handleContainerOverflow = handleContainerOverflow;
    this.modals = [];
    this.containers = [];
    this.data = [];
    this.scrollbarSize = getScrollbarSize();
  }

  var _proto = ModalManager.prototype;

  _proto.isContainerOverflowing = function isContainerOverflowing(modal) {
    var data = this.data[this.containerIndexFromModal(modal)];
    return data && data.overflowing;
  };

  _proto.containerIndexFromModal = function containerIndexFromModal(modal) {
    return findIndexOf(this.data, function (d) {
      return d.modals.indexOf(modal) !== -1;
    });
  };

  _proto.setContainerStyle = function setContainerStyle(containerState, container) {
    var style = {
      overflow: 'hidden'
    }; // we are only interested in the actual `style` here
    // because we will override it

    containerState.style = {
      overflow: container.style.overflow,
      paddingRight: container.style.paddingRight
    };

    if (containerState.overflowing) {
      // use computed style, here to get the real padding
      // to add our scrollbar width
      style.paddingRight = parseInt(css(container, 'paddingRight') || '0', 10) + this.scrollbarSize + "px";
    }

    css(container, style);
  };

  _proto.removeContainerStyle = function removeContainerStyle(containerState, container) {
    Object.assign(container.style, containerState.style);
  };

  _proto.add = function add(modal, container, className) {
    var modalIdx = this.modals.indexOf(modal);
    var containerIdx = this.containers.indexOf(container);

    if (modalIdx !== -1) {
      return modalIdx;
    }

    modalIdx = this.modals.length;
    this.modals.push(modal);

    if (this.hideSiblingNodes) {
      hideSiblings(container, modal);
    }

    if (containerIdx !== -1) {
      this.data[containerIdx].modals.push(modal);
      return modalIdx;
    }

    var data = {
      modals: [modal],
      // right now only the first modal of a container will have its classes applied
      classes: className ? className.split(/\s+/) : [],
      overflowing: isOverflowing(container)
    };

    if (this.handleContainerOverflow) {
      this.setContainerStyle(data, container);
    }

    data.classes.forEach(addClass.bind(null, container));
    this.containers.push(container);
    this.data.push(data);
    return modalIdx;
  };

  _proto.remove = function remove(modal) {
    var modalIdx = this.modals.indexOf(modal);

    if (modalIdx === -1) {
      return;
    }

    var containerIdx = this.containerIndexFromModal(modal);
    var data = this.data[containerIdx];
    var container = this.containers[containerIdx];
    data.modals.splice(data.modals.indexOf(modal), 1);
    this.modals.splice(modalIdx, 1); // if that was the last modal in a container,
    // clean up the container

    if (data.modals.length === 0) {
      data.classes.forEach(removeClass.bind(null, container));

      if (this.handleContainerOverflow) {
        this.removeContainerStyle(data, container);
      }

      if (this.hideSiblingNodes) {
        showSiblings(container, modal);
      }

      this.containers.splice(containerIdx, 1);
      this.data.splice(containerIdx, 1);
    } else if (this.hideSiblingNodes) {
      // otherwise make sure the next top modal is visible to a SR
      var _data$modals = data.modals[data.modals.length - 1],
          backdrop = _data$modals.backdrop,
          dialog = _data$modals.dialog;
      ariaHidden(false, dialog);
      ariaHidden(false, backdrop);
    }
  };

  _proto.isTopModal = function isTopModal(modal) {
    return !!this.modals.length && this.modals[this.modals.length - 1] === modal;
  };

  return ModalManager;
}();

export default ModalManager;