/*!
* tabbable 6.0.1
* @license MIT, https://github.com/focus-trap/tabbable/blob/master/LICENSE
*/
var candidateSelectors = ['input', 'select', 'textarea', 'a[href]', 'button', '[tabindex]:not(slot)', 'audio[controls]', 'video[controls]', '[contenteditable]:not([contenteditable="false"])', 'details>summary:first-of-type', 'details'];
var candidateSelector = /* #__PURE__ */candidateSelectors.join(',');
var NoElement = typeof Element === 'undefined';
var matches = NoElement ? function () {} : Element.prototype.matches || Element.prototype.msMatchesSelector || Element.prototype.webkitMatchesSelector;
var getRootNode = !NoElement && Element.prototype.getRootNode ? function (element) {
  return element.getRootNode();
} : function (element) {
  return element.ownerDocument;
};

/**
 * @param {Element} el container to check in
 * @param {boolean} includeContainer add container to check
 * @param {(node: Element) => boolean} filter filter candidates
 * @returns {Element[]}
 */
var getCandidates = function getCandidates(el, includeContainer, filter) {
  var candidates = Array.prototype.slice.apply(el.querySelectorAll(candidateSelector));
  if (includeContainer && matches.call(el, candidateSelector)) {
    candidates.unshift(el);
  }
  candidates = candidates.filter(filter);
  return candidates;
};

/**
 * @callback GetShadowRoot
 * @param {Element} element to check for shadow root
 * @returns {ShadowRoot|boolean} ShadowRoot if available or boolean indicating if a shadowRoot is attached but not available.
 */

/**
 * @callback ShadowRootFilter
 * @param {Element} shadowHostNode the element which contains shadow content
 * @returns {boolean} true if a shadow root could potentially contain valid candidates.
 */

/**
 * @typedef {Object} CandidateScope
 * @property {Element} scopeParent contains inner candidates
 * @property {Element[]} candidates list of candidates found in the scope parent
 */

/**
 * @typedef {Object} IterativeOptions
 * @property {GetShadowRoot|boolean} getShadowRoot true if shadow support is enabled; falsy if not;
 *  if a function, implies shadow support is enabled and either returns the shadow root of an element
 *  or a boolean stating if it has an undisclosed shadow root
 * @property {(node: Element) => boolean} filter filter candidates
 * @property {boolean} flatten if true then result will flatten any CandidateScope into the returned list
 * @property {ShadowRootFilter} shadowRootFilter filter shadow roots;
 */

/**
 * @param {Element[]} elements list of element containers to match candidates from
 * @param {boolean} includeContainer add container list to check
 * @param {IterativeOptions} options
 * @returns {Array.<Element|CandidateScope>}
 */
var getCandidatesIteratively = function getCandidatesIteratively(elements, includeContainer, options) {
  var candidates = [];
  var elementsToCheck = Array.from(elements);
  while (elementsToCheck.length) {
    var element = elementsToCheck.shift();
    if (element.tagName === 'SLOT') {
      // add shadow dom slot scope (slot itself cannot be focusable)
      var assigned = element.assignedElements();
      var content = assigned.length ? assigned : element.children;
      var nestedCandidates = getCandidatesIteratively(content, true, options);
      if (options.flatten) {
        candidates.push.apply(candidates, nestedCandidates);
      } else {
        candidates.push({
          scopeParent: element,
          candidates: nestedCandidates
        });
      }
    } else {
      // check candidate element
      var validCandidate = matches.call(element, candidateSelector);
      if (validCandidate && options.filter(element) && (includeContainer || !elements.includes(element))) {
        candidates.push(element);
      }

      // iterate over shadow content if possible
      var shadowRoot = element.shadowRoot ||
      // check for an undisclosed shadow
      typeof options.getShadowRoot === 'function' && options.getShadowRoot(element);
      var validShadowRoot = !options.shadowRootFilter || options.shadowRootFilter(element);
      if (shadowRoot && validShadowRoot) {
        // add shadow dom scope IIF a shadow root node was given; otherwise, an undisclosed
        //  shadow exists, so look at light dom children as fallback BUT create a scope for any
        //  child candidates found because they're likely slotted elements (elements that are
        //  children of the web component element (which has the shadow), in the light dom, but
        //  slotted somewhere _inside_ the undisclosed shadow) -- the scope is created below,
        //  _after_ we return from this recursive call
        var _nestedCandidates = getCandidatesIteratively(shadowRoot === true ? element.children : shadowRoot.children, true, options);
        if (options.flatten) {
          candidates.push.apply(candidates, _nestedCandidates);
        } else {
          candidates.push({
            scopeParent: element,
            candidates: _nestedCandidates
          });
        }
      } else {
        // there's not shadow so just dig into the element's (light dom) children
        //  __without__ giving the element special scope treatment
        elementsToCheck.unshift.apply(elementsToCheck, element.children);
      }
    }
  }
  return candidates;
};
var getTabindex = function getTabindex(node, isScope) {
  if (node.tabIndex < 0) {
    // in Chrome, <details/>, <audio controls/> and <video controls/> elements get a default
    // `tabIndex` of -1 when the 'tabindex' attribute isn't specified in the DOM,
    // yet they are still part of the regular tab order; in FF, they get a default
    // `tabIndex` of 0; since Chrome still puts those elements in the regular tab
    // order, consider their tab index to be 0.
    // Also browsers do not return `tabIndex` correctly for contentEditable nodes;
    // so if they don't have a tabindex attribute specifically set, assume it's 0.
    //
    // isScope is positive for custom element with shadow root or slot that by default
    // have tabIndex -1, but need to be sorted by document order in order for their
    // content to be inserted in the correct position
    if ((isScope || /^(AUDIO|VIDEO|DETAILS)$/.test(node.tagName) || node.isContentEditable) && isNaN(parseInt(node.getAttribute('tabindex'), 10))) {
      return 0;
    }
  }
  return node.tabIndex;
};
var sortOrderedTabbables = function sortOrderedTabbables(a, b) {
  return a.tabIndex === b.tabIndex ? a.documentOrder - b.documentOrder : a.tabIndex - b.tabIndex;
};
var isInput = function isInput(node) {
  return node.tagName === 'INPUT';
};
var isHiddenInput = function isHiddenInput(node) {
  return isInput(node) && node.type === 'hidden';
};
var isDetailsWithSummary = function isDetailsWithSummary(node) {
  var r = node.tagName === 'DETAILS' && Array.prototype.slice.apply(node.children).some(function (child) {
    return child.tagName === 'SUMMARY';
  });
  return r;
};
var getCheckedRadio = function getCheckedRadio(nodes, form) {
  for (var i = 0; i < nodes.length; i++) {
    if (nodes[i].checked && nodes[i].form === form) {
      return nodes[i];
    }
  }
};
var isTabbableRadio = function isTabbableRadio(node) {
  if (!node.name) {
    return true;
  }
  var radioScope = node.form || getRootNode(node);
  var queryRadios = function queryRadios(name) {
    return radioScope.querySelectorAll('input[type="radio"][name="' + name + '"]');
  };
  var radioSet;
  if (typeof window !== 'undefined' && typeof window.CSS !== 'undefined' && typeof window.CSS.escape === 'function') {
    radioSet = queryRadios(window.CSS.escape(node.name));
  } else {
    try {
      radioSet = queryRadios(node.name);
    } catch (err) {
      // eslint-disable-next-line no-console
      console.error('Looks like you have a radio button with a name attribute containing invalid CSS selector characters and need the CSS.escape polyfill: %s', err.message);
      return false;
    }
  }
  var checked = getCheckedRadio(radioSet, node.form);
  return !checked || checked === node;
};
var isRadio = function isRadio(node) {
  return isInput(node) && node.type === 'radio';
};
var isNonTabbableRadio = function isNonTabbableRadio(node) {
  return isRadio(node) && !isTabbableRadio(node);
};

// determines if a node is ultimately attached to the window's document
var isNodeAttached = function isNodeAttached(node) {
  var _nodeRootHost;
  // The root node is the shadow root if the node is in a shadow DOM; some document otherwise
  //  (but NOT _the_ document; see second 'If' comment below for more).
  // If rootNode is shadow root, it'll have a host, which is the element to which the shadow
  //  is attached, and the one we need to check if it's in the document or not (because the
  //  shadow, and all nodes it contains, is never considered in the document since shadows
  //  behave like self-contained DOMs; but if the shadow's HOST, which is part of the document,
  //  is hidden, or is not in the document itself but is detached, it will affect the shadow's
  //  visibility, including all the nodes it contains). The host could be any normal node,
  //  or a custom element (i.e. web component). Either way, that's the one that is considered
  //  part of the document, not the shadow root, nor any of its children (i.e. the node being
  //  tested).
  // To further complicate things, we have to look all the way up until we find a shadow HOST
  //  that is attached (or find none) because the node might be in nested shadows...
  // If rootNode is not a shadow root, it won't have a host, and so rootNode should be the
  //  document (per the docs) and while it's a Document-type object, that document does not
  //  appear to be the same as the node's `ownerDocument` for some reason, so it's safer
  //  to ignore the rootNode at this point, and use `node.ownerDocument`. Otherwise,
  //  using `rootNode.contains(node)` will _always_ be true we'll get false-positives when
  //  node is actually detached.
  var nodeRootHost = getRootNode(node).host;
  var attached = !!((_nodeRootHost = nodeRootHost) !== null && _nodeRootHost !== void 0 && _nodeRootHost.ownerDocument.contains(nodeRootHost) || node.ownerDocument.contains(node));
  while (!attached && nodeRootHost) {
    var _nodeRootHost2;
    // since it's not attached and we have a root host, the node MUST be in a nested shadow DOM,
    //  which means we need to get the host's host and check if that parent host is contained
    //  in (i.e. attached to) the document
    nodeRootHost = getRootNode(nodeRootHost).host;
    attached = !!((_nodeRootHost2 = nodeRootHost) !== null && _nodeRootHost2 !== void 0 && _nodeRootHost2.ownerDocument.contains(nodeRootHost));
  }
  return attached;
};
var isZeroArea = function isZeroArea(node) {
  var _node$getBoundingClie = node.getBoundingClientRect(),
    width = _node$getBoundingClie.width,
    height = _node$getBoundingClie.height;
  return width === 0 && height === 0;
};
var isHidden = function isHidden(node, _ref) {
  var displayCheck = _ref.displayCheck,
    getShadowRoot = _ref.getShadowRoot;
  // NOTE: visibility will be `undefined` if node is detached from the document
  //  (see notes about this further down), which means we will consider it visible
  //  (this is legacy behavior from a very long way back)
  // NOTE: we check this regardless of `displayCheck="none"` because this is a
  //  _visibility_ check, not a _display_ check
  if (getComputedStyle(node).visibility === 'hidden') {
    return true;
  }
  var isDirectSummary = matches.call(node, 'details>summary:first-of-type');
  var nodeUnderDetails = isDirectSummary ? node.parentElement : node;
  if (matches.call(nodeUnderDetails, 'details:not([open]) *')) {
    return true;
  }
  if (!displayCheck || displayCheck === 'full' || displayCheck === 'legacy-full') {
    if (typeof getShadowRoot === 'function') {
      // figure out if we should consider the node to be in an undisclosed shadow and use the
      //  'non-zero-area' fallback
      var originalNode = node;
      while (node) {
        var parentElement = node.parentElement;
        var rootNode = getRootNode(node);
        if (parentElement && !parentElement.shadowRoot && getShadowRoot(parentElement) === true // check if there's an undisclosed shadow
        ) {
          // node has an undisclosed shadow which means we can only treat it as a black box, so we
          //  fall back to a non-zero-area test
          return isZeroArea(node);
        } else if (node.assignedSlot) {
          // iterate up slot
          node = node.assignedSlot;
        } else if (!parentElement && rootNode !== node.ownerDocument) {
          // cross shadow boundary
          node = rootNode.host;
        } else {
          // iterate up normal dom
          node = parentElement;
        }
      }
      node = originalNode;
    }
    // else, `getShadowRoot` might be true, but all that does is enable shadow DOM support
    //  (i.e. it does not also presume that all nodes might have undisclosed shadows); or
    //  it might be a falsy value, which means shadow DOM support is disabled

    // Since we didn't find it sitting in an undisclosed shadow (or shadows are disabled)
    //  now we can just test to see if it would normally be visible or not, provided it's
    //  attached to the main document.
    // NOTE: We must consider case where node is inside a shadow DOM and given directly to
    //  `isTabbable()` or `isFocusable()` -- regardless of `getShadowRoot` option setting.

    if (isNodeAttached(node)) {
      // this works wherever the node is: if there's at least one client rect, it's
      //  somehow displayed; it also covers the CSS 'display: contents' case where the
      //  node itself is hidden in place of its contents; and there's no need to search
      //  up the hierarchy either
      return !node.getClientRects().length;
    }

    // Else, the node isn't attached to the document, which means the `getClientRects()`
    //  API will __always__ return zero rects (this can happen, for example, if React
    //  is used to render nodes onto a detached tree, as confirmed in this thread:
    //  https://github.com/facebook/react/issues/9117#issuecomment-284228870)
    //
    // It also means that even window.getComputedStyle(node).display will return `undefined`
    //  because styles are only computed for nodes that are in the document.
    //
    // NOTE: THIS HAS BEEN THE CASE FOR YEARS. It is not new, nor is it caused by tabbable
    //  somehow. Though it was never stated officially, anyone who has ever used tabbable
    //  APIs on nodes in detached containers has actually implicitly used tabbable in what
    //  was later (as of v5.2.0 on Apr 9, 2021) called `displayCheck="none"` mode -- essentially
    //  considering __everything__ to be visible because of the innability to determine styles.
    //
    // v6.0.0: As of this major release, the default 'full' option __no longer treats detached
    //  nodes as visible with the 'none' fallback.__
    if (displayCheck !== 'legacy-full') {
      return true; // hidden
    }
    // else, fallback to 'none' mode and consider the node visible
  } else if (displayCheck === 'non-zero-area') {
    // NOTE: Even though this tests that the node's client rect is non-zero to determine
    //  whether it's displayed, and that a detached node will __always__ have a zero-area
    //  client rect, we don't special-case for whether the node is attached or not. In
    //  this mode, we do want to consider nodes that have a zero area to be hidden at all
    //  times, and that includes attached or not.
    return isZeroArea(node);
  }

  // visible, as far as we can tell, or per current `displayCheck=none` mode, we assume
  //  it's visible
  return false;
};

// form fields (nested) inside a disabled fieldset are not focusable/tabbable
//  unless they are in the _first_ <legend> element of the top-most disabled
//  fieldset
var isDisabledFromFieldset = function isDisabledFromFieldset(node) {
  if (/^(INPUT|BUTTON|SELECT|TEXTAREA)$/.test(node.tagName)) {
    var parentNode = node.parentElement;
    // check if `node` is contained in a disabled <fieldset>
    while (parentNode) {
      if (parentNode.tagName === 'FIELDSET' && parentNode.disabled) {
        // look for the first <legend> among the children of the disabled <fieldset>
        for (var i = 0; i < parentNode.children.length; i++) {
          var child = parentNode.children.item(i);
          // when the first <legend> (in document order) is found
          if (child.tagName === 'LEGEND') {
            // if its parent <fieldset> is not nested in another disabled <fieldset>,
            // return whether `node` is a descendant of its first <legend>
            return matches.call(parentNode, 'fieldset[disabled] *') ? true : !child.contains(node);
          }
        }
        // the disabled <fieldset> containing `node` has no <legend>
        return true;
      }
      parentNode = parentNode.parentElement;
    }
  }

  // else, node's tabbable/focusable state should not be affected by a fieldset's
  //  enabled/disabled state
  return false;
};
var isNodeMatchingSelectorFocusable = function isNodeMatchingSelectorFocusable(options, node) {
  if (node.disabled || isHiddenInput(node) || isHidden(node, options) ||
  // For a details element with a summary, the summary element gets the focus
  isDetailsWithSummary(node) || isDisabledFromFieldset(node)) {
    return false;
  }
  return true;
};
var isNodeMatchingSelectorTabbable = function isNodeMatchingSelectorTabbable(options, node) {
  if (isNonTabbableRadio(node) || getTabindex(node) < 0 || !isNodeMatchingSelectorFocusable(options, node)) {
    return false;
  }
  return true;
};
var isValidShadowRootTabbable = function isValidShadowRootTabbable(shadowHostNode) {
  var tabIndex = parseInt(shadowHostNode.getAttribute('tabindex'), 10);
  if (isNaN(tabIndex) || tabIndex >= 0) {
    return true;
  }
  // If a custom element has an explicit negative tabindex,
  // browsers will not allow tab targeting said element's children.
  return false;
};

/**
 * @param {Array.<Element|CandidateScope>} candidates
 * @returns Element[]
 */
var sortByOrder = function sortByOrder(candidates) {
  var regularTabbables = [];
  var orderedTabbables = [];
  candidates.forEach(function (item, i) {
    var isScope = !!item.scopeParent;
    var element = isScope ? item.scopeParent : item;
    var candidateTabindex = getTabindex(element, isScope);
    var elements = isScope ? sortByOrder(item.candidates) : element;
    if (candidateTabindex === 0) {
      isScope ? regularTabbables.push.apply(regularTabbables, elements) : regularTabbables.push(element);
    } else {
      orderedTabbables.push({
        documentOrder: i,
        tabIndex: candidateTabindex,
        item: item,
        isScope: isScope,
        content: elements
      });
    }
  });
  return orderedTabbables.sort(sortOrderedTabbables).reduce(function (acc, sortable) {
    sortable.isScope ? acc.push.apply(acc, sortable.content) : acc.push(sortable.content);
    return acc;
  }, []).concat(regularTabbables);
};
var tabbable = function tabbable(el, options) {
  options = options || {};
  var candidates;
  if (options.getShadowRoot) {
    candidates = getCandidatesIteratively([el], options.includeContainer, {
      filter: isNodeMatchingSelectorTabbable.bind(null, options),
      flatten: false,
      getShadowRoot: options.getShadowRoot,
      shadowRootFilter: isValidShadowRootTabbable
    });
  } else {
    candidates = getCandidates(el, options.includeContainer, isNodeMatchingSelectorTabbable.bind(null, options));
  }
  return sortByOrder(candidates);
};
var focusable = function focusable(el, options) {
  options = options || {};
  var candidates;
  if (options.getShadowRoot) {
    candidates = getCandidatesIteratively([el], options.includeContainer, {
      filter: isNodeMatchingSelectorFocusable.bind(null, options),
      flatten: true,
      getShadowRoot: options.getShadowRoot
    });
  } else {
    candidates = getCandidates(el, options.includeContainer, isNodeMatchingSelectorFocusable.bind(null, options));
  }
  return candidates;
};
var isTabbable = function isTabbable(node, options) {
  options = options || {};
  if (!node) {
    throw new Error('No node provided');
  }
  if (matches.call(node, candidateSelector) === false) {
    return false;
  }
  return isNodeMatchingSelectorTabbable(options, node);
};
var focusableCandidateSelector = /* #__PURE__ */candidateSelectors.concat('iframe').join(',');
var isFocusable = function isFocusable(node, options) {
  options = options || {};
  if (!node) {
    throw new Error('No node provided');
  }
  if (matches.call(node, focusableCandidateSelector) === false) {
    return false;
  }
  return isNodeMatchingSelectorFocusable(options, node);
};

export { focusable, isFocusable, isTabbable, tabbable };
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