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Viewing file:     ModalManager.js (8.25 KB)      -rw-r--r--

"use strict";

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

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.ariaHidden = ariaHidden;
exports.default = void 0;

var _classCallCheck2 = _interopRequireDefault(require("@babel/runtime/helpers/classCallCheck"));

var _createClass2 = _interopRequireDefault(require("@babel/runtime/helpers/createClass"));

var _toConsumableArray2 = _interopRequireDefault(require("@babel/runtime/helpers/toConsumableArray"));

var _getScrollbarSize = _interopRequireDefault(require("../utils/getScrollbarSize"));

var _ownerDocument = _interopRequireDefault(require("../utils/ownerDocument"));

var _ownerWindow = _interopRequireDefault(require("../utils/ownerWindow"));

// Is a vertical scrollbar displayed?
function isOverflowing(container) {
  var doc = (0, _ownerDocument.default)(container);

  if (doc.body === container) {
    return (0, _ownerWindow.default)(doc).innerWidth > doc.documentElement.clientWidth;
  }

  return container.scrollHeight > container.clientHeight;
}

function ariaHidden(node, show) {
  if (show) {
    node.setAttribute('aria-hidden', 'true');
  } else {
    node.removeAttribute('aria-hidden');
  }
}

function getPaddingRight(node) {
  return parseInt(window.getComputedStyle(node)['padding-right'], 10) || 0;
}

function ariaHiddenSiblings(container, mountNode, currentNode) {
  var nodesToExclude = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : [];
  var show = arguments.length > 4 ? arguments[4] : undefined;
  var blacklist = [mountNode, currentNode].concat((0, _toConsumableArray2.default)(nodesToExclude));
  var blacklistTagNames = ['TEMPLATE', 'SCRIPT', 'STYLE'];
  [].forEach.call(container.children, function (node) {
    if (node.nodeType === 1 && blacklist.indexOf(node) === -1 && blacklistTagNames.indexOf(node.tagName) === -1) {
      ariaHidden(node, show);
    }
  });
}

function findIndexOf(containerInfo, callback) {
  var idx = -1;
  containerInfo.some(function (item, index) {
    if (callback(item)) {
      idx = index;
      return true;
    }

    return false;
  });
  return idx;
}

function handleContainer(containerInfo, props) {
  var restoreStyle = [];
  var restorePaddings = [];
  var container = containerInfo.container;
  var fixedNodes;

  if (!props.disableScrollLock) {
    if (isOverflowing(container)) {
      // Compute the size before applying overflow hidden to avoid any scroll jumps.
      var scrollbarSize = (0, _getScrollbarSize.default)();
      restoreStyle.push({
        value: container.style.paddingRight,
        key: 'padding-right',
        el: container
      }); // Use computed style, here to get the real padding to add our scrollbar width.

      container.style['padding-right'] = "".concat(getPaddingRight(container) + scrollbarSize, "px"); // .mui-fixed is a global helper.

      fixedNodes = (0, _ownerDocument.default)(container).querySelectorAll('.mui-fixed');
      [].forEach.call(fixedNodes, function (node) {
        restorePaddings.push(node.style.paddingRight);
        node.style.paddingRight = "".concat(getPaddingRight(node) + scrollbarSize, "px");
      });
    } // Improve Gatsby support
    // https://css-tricks.com/snippets/css/force-vertical-scrollbar/


    var parent = container.parentElement;
    var scrollContainer = parent.nodeName === 'HTML' && window.getComputedStyle(parent)['overflow-y'] === 'scroll' ? parent : container; // Block the scroll even if no scrollbar is visible to account for mobile keyboard
    // screensize shrink.

    restoreStyle.push({
      value: scrollContainer.style.overflow,
      key: 'overflow',
      el: scrollContainer
    });
    scrollContainer.style.overflow = 'hidden';
  }

  var restore = function restore() {
    if (fixedNodes) {
      [].forEach.call(fixedNodes, function (node, i) {
        if (restorePaddings[i]) {
          node.style.paddingRight = restorePaddings[i];
        } else {
          node.style.removeProperty('padding-right');
        }
      });
    }

    restoreStyle.forEach(function (_ref) {
      var value = _ref.value,
          el = _ref.el,
          key = _ref.key;

      if (value) {
        el.style.setProperty(key, value);
      } else {
        el.style.removeProperty(key);
      }
    });
  };

  return restore;
}

function getHiddenSiblings(container) {
  var hiddenSiblings = [];
  [].forEach.call(container.children, function (node) {
    if (node.getAttribute && node.getAttribute('aria-hidden') === 'true') {
      hiddenSiblings.push(node);
    }
  });
  return hiddenSiblings;
}
/**
 * @ignore - do not document.
 *
 * Proper state management for containers and the modals in those containers.
 * Simplified, but inspired by react-overlay's ModalManager class.
 * Used by the Modal to ensure proper styling of containers.
 */


var ModalManager = /*#__PURE__*/function () {
  function ModalManager() {
    (0, _classCallCheck2.default)(this, ModalManager);
    // this.modals[modalIndex] = modal
    this.modals = []; // this.containers[containerIndex] = {
    //   modals: [],
    //   container,
    //   restore: null,
    // }

    this.containers = [];
  }

  (0, _createClass2.default)(ModalManager, [{
    key: "add",
    value: function add(modal, container) {
      var modalIndex = this.modals.indexOf(modal);

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

      modalIndex = this.modals.length;
      this.modals.push(modal); // If the modal we are adding is already in the DOM.

      if (modal.modalRef) {
        ariaHidden(modal.modalRef, false);
      }

      var hiddenSiblingNodes = getHiddenSiblings(container);
      ariaHiddenSiblings(container, modal.mountNode, modal.modalRef, hiddenSiblingNodes, true);
      var containerIndex = findIndexOf(this.containers, function (item) {
        return item.container === container;
      });

      if (containerIndex !== -1) {
        this.containers[containerIndex].modals.push(modal);
        return modalIndex;
      }

      this.containers.push({
        modals: [modal],
        container: container,
        restore: null,
        hiddenSiblingNodes: hiddenSiblingNodes
      });
      return modalIndex;
    }
  }, {
    key: "mount",
    value: function mount(modal, props) {
      var containerIndex = findIndexOf(this.containers, function (item) {
        return item.modals.indexOf(modal) !== -1;
      });
      var containerInfo = this.containers[containerIndex];

      if (!containerInfo.restore) {
        containerInfo.restore = handleContainer(containerInfo, props);
      }
    }
  }, {
    key: "remove",
    value: function remove(modal) {
      var modalIndex = this.modals.indexOf(modal);

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

      var containerIndex = findIndexOf(this.containers, function (item) {
        return item.modals.indexOf(modal) !== -1;
      });
      var containerInfo = this.containers[containerIndex];
      containerInfo.modals.splice(containerInfo.modals.indexOf(modal), 1);
      this.modals.splice(modalIndex, 1); // If that was the last modal in a container, clean up the container.

      if (containerInfo.modals.length === 0) {
        // The modal might be closed before it had the chance to be mounted in the DOM.
        if (containerInfo.restore) {
          containerInfo.restore();
        }

        if (modal.modalRef) {
          // In case the modal wasn't in the DOM yet.
          ariaHidden(modal.modalRef, true);
        }

        ariaHiddenSiblings(containerInfo.container, modal.mountNode, modal.modalRef, containerInfo.hiddenSiblingNodes, false);
        this.containers.splice(containerIndex, 1);
      } else {
        // Otherwise make sure the next top modal is visible to a screen reader.
        var nextTop = containerInfo.modals[containerInfo.modals.length - 1]; // as soon as a modal is adding its modalRef is undefined. it can't set
        // aria-hidden because the dom element doesn't exist either
        // when modal was unmounted before modalRef gets null

        if (nextTop.modalRef) {
          ariaHidden(nextTop.modalRef, false);
        }
      }

      return modalIndex;
    }
  }, {
    key: "isTopModal",
    value: function isTopModal(modal) {
      return this.modals.length > 0 && this.modals[this.modals.length - 1] === modal;
    }
  }]);
  return ModalManager;
}();

exports.default = ModalManager;