devongovett-react-overlays/lib/ModalManager.js

Utilities for creating robust overlay components

'use strict';

exports.__esModule = true;

var _class = require('dom-helpers/class');

var _class2 = _interopRequireDefault(_class);

var _style = require('dom-helpers/style');

var _style2 = _interopRequireDefault(_style);

var _scrollbarSize = require('dom-helpers/util/scrollbarSize');

var _scrollbarSize2 = _interopRequireDefault(_scrollbarSize);

var _isOverflowing = require('./utils/isOverflowing');

var _isOverflowing2 = _interopRequireDefault(_isOverflowing);

var _manageAriaHidden = require('./utils/manageAriaHidden');

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

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

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

function setContainerStyle(state, container) {
  var style = { overflow: 'hidden' };

  // we are only interested in the actual `style` here
  // becasue we will override it
  state.style = {
    overflow: container.style.overflow,
    paddingRight: container.style.paddingRight
  };

  if (state.overflowing) {
    // use computed style, here to get the real padding
    // to add our scrollbar width
    style.paddingRight = parseInt((0, _style2.default)(container, 'paddingRight') || 0, 10) + (0, _scrollbarSize2.default)() + 'px';
  }

  (0, _style2.default)(container, style);
}

function removeContainerStyle(_ref, container) {
  var style = _ref.style;


  Object.keys(style).forEach(function (key) {
    return container.style[key] = style[key];
  });
}
/**
 * Proper state managment for containers and the modals in those containers.
 *
 * @internal Used by the Modal to ensure proper styling of containers.
 */

var ModalManager = function ModalManager() {
  var _this = this;

  var _ref2 = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {},
      _ref2$hideSiblingNode = _ref2.hideSiblingNodes,
      hideSiblingNodes = _ref2$hideSiblingNode === undefined ? true : _ref2$hideSiblingNode,
      _ref2$handleContainer = _ref2.handleContainerOverflow,
      handleContainerOverflow = _ref2$handleContainer === undefined ? true : _ref2$handleContainer;

  _classCallCheck(this, ModalManager);

  this.add = function (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) {
      (0, _manageAriaHidden.hideSiblings)(container, modal.mountNode);
    }

    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: (0, _isOverflowing2.default)(container)
    };

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

    data.classes.forEach(_class2.default.addClass.bind(null, container));

    _this.containers.push(container);
    _this.data.push(data);

    return modalIdx;
  };

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

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

    var containerIdx = findContainer(_this.data, 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(_class2.default.removeClass.bind(null, container));

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

      if (_this.hideSiblingNodes) {
        (0, _manageAriaHidden.showSiblings)(container, modal.mountNode);
      }
      _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
      (0, _manageAriaHidden.ariaHidden)(false, data.modals[data.modals.length - 1].mountNode);
    }
  };

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

  this.hideSiblingNodes = hideSiblingNodes;
  this.handleContainerOverflow = handleContainerOverflow;
  this.modals = [];
  this.containers = [];
  this.data = [];
};

exports.default = ModalManager;
module.exports = exports['default'];