WordPress/wp-includes/js/dist/dom.js

this["wp"] = this["wp"] || {}; this["wp"]["dom"] =
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/***/ 17:
/***/ (function(module, __webpack_exports__, __webpack_require__) {

"use strict";

// EXPORTS
__webpack_require__.d(__webpack_exports__, "a", function() { return /* binding */ _toConsumableArray; });

// CONCATENATED MODULE: ./node_modules/@babel/runtime/helpers/esm/arrayWithoutHoles.js
function _arrayWithoutHoles(arr) {
  if (Array.isArray(arr)) {
    for (var i = 0, arr2 = new Array(arr.length); i < arr.length; i++) {
      arr2[i] = arr[i];
    }

    return arr2;
  }
}
// EXTERNAL MODULE: ./node_modules/@babel/runtime/helpers/esm/iterableToArray.js
var iterableToArray = __webpack_require__(34);

// CONCATENATED MODULE: ./node_modules/@babel/runtime/helpers/esm/nonIterableSpread.js
function _nonIterableSpread() {
  throw new TypeError("Invalid attempt to spread non-iterable instance");
}
// CONCATENATED MODULE: ./node_modules/@babel/runtime/helpers/esm/toConsumableArray.js



function _toConsumableArray(arr) {
  return _arrayWithoutHoles(arr) || Object(iterableToArray["a" /* default */])(arr) || _nonIterableSpread();
}

/***/ }),

/***/ 2:
/***/ (function(module, exports) {

(function() { module.exports = this["lodash"]; }());

/***/ }),

/***/ 34:
/***/ (function(module, __webpack_exports__, __webpack_require__) {

"use strict";
/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "a", function() { return _iterableToArray; });
function _iterableToArray(iter) {
  if (Symbol.iterator in Object(iter) || Object.prototype.toString.call(iter) === "[object Arguments]") return Array.from(iter);
}

/***/ }),

/***/ 379:
/***/ (function(module, __webpack_exports__, __webpack_require__) {

"use strict";
// ESM COMPAT FLAG
__webpack_require__.r(__webpack_exports__);

// EXPORTS
__webpack_require__.d(__webpack_exports__, "focus", function() { return /* binding */ build_module_focus; });
__webpack_require__.d(__webpack_exports__, "isHorizontalEdge", function() { return /* reexport */ isHorizontalEdge; });
__webpack_require__.d(__webpack_exports__, "isVerticalEdge", function() { return /* reexport */ isVerticalEdge; });
__webpack_require__.d(__webpack_exports__, "getRectangleFromRange", function() { return /* reexport */ getRectangleFromRange; });
__webpack_require__.d(__webpack_exports__, "computeCaretRect", function() { return /* reexport */ computeCaretRect; });
__webpack_require__.d(__webpack_exports__, "placeCaretAtHorizontalEdge", function() { return /* reexport */ placeCaretAtHorizontalEdge; });
__webpack_require__.d(__webpack_exports__, "placeCaretAtVerticalEdge", function() { return /* reexport */ placeCaretAtVerticalEdge; });
__webpack_require__.d(__webpack_exports__, "isTextField", function() { return /* reexport */ isTextField; });
__webpack_require__.d(__webpack_exports__, "documentHasSelection", function() { return /* reexport */ documentHasSelection; });
__webpack_require__.d(__webpack_exports__, "isEntirelySelected", function() { return /* reexport */ isEntirelySelected; });
__webpack_require__.d(__webpack_exports__, "getScrollContainer", function() { return /* reexport */ getScrollContainer; });
__webpack_require__.d(__webpack_exports__, "getOffsetParent", function() { return /* reexport */ getOffsetParent; });
__webpack_require__.d(__webpack_exports__, "replace", function() { return /* reexport */ replace; });
__webpack_require__.d(__webpack_exports__, "remove", function() { return /* reexport */ remove; });
__webpack_require__.d(__webpack_exports__, "insertAfter", function() { return /* reexport */ insertAfter; });
__webpack_require__.d(__webpack_exports__, "unwrap", function() { return /* reexport */ unwrap; });
__webpack_require__.d(__webpack_exports__, "replaceTag", function() { return /* reexport */ replaceTag; });
__webpack_require__.d(__webpack_exports__, "wrap", function() { return /* reexport */ wrap; });

// NAMESPACE OBJECT: ./node_modules/@wordpress/dom/build-module/focusable.js
var focusable_namespaceObject = {};
__webpack_require__.r(focusable_namespaceObject);
__webpack_require__.d(focusable_namespaceObject, "find", function() { return find; });

// NAMESPACE OBJECT: ./node_modules/@wordpress/dom/build-module/tabbable.js
var tabbable_namespaceObject = {};
__webpack_require__.r(tabbable_namespaceObject);
__webpack_require__.d(tabbable_namespaceObject, "isTabbableIndex", function() { return isTabbableIndex; });
__webpack_require__.d(tabbable_namespaceObject, "find", function() { return tabbable_find; });

// EXTERNAL MODULE: ./node_modules/@babel/runtime/helpers/esm/toConsumableArray.js + 2 modules
var toConsumableArray = __webpack_require__(17);

// CONCATENATED MODULE: ./node_modules/@wordpress/dom/build-module/focusable.js


/**
 * References:
 *
 * Focusable:
 *  - https://www.w3.org/TR/html5/editing.html#focus-management
 *
 * Sequential focus navigation:
 *  - https://www.w3.org/TR/html5/editing.html#sequential-focus-navigation-and-the-tabindex-attribute
 *
 * Disabled elements:
 *  - https://www.w3.org/TR/html5/disabled-elements.html#disabled-elements
 *
 * getClientRects algorithm (requiring layout box):
 *  - https://www.w3.org/TR/cssom-view-1/#extension-to-the-element-interface
 *
 * AREA elements associated with an IMG:
 *  - https://w3c.github.io/html/editing.html#data-model
 */
var SELECTOR = ['[tabindex]', 'a[href]', 'button:not([disabled])', 'input:not([type="hidden"]):not([disabled])', 'select:not([disabled])', 'textarea:not([disabled])', 'iframe', 'object', 'embed', 'area[href]', '[contenteditable]:not([contenteditable=false])'].join(',');
/**
 * Returns true if the specified element is visible (i.e. neither display: none
 * nor visibility: hidden).
 *
 * @param {Element} element DOM element to test.
 *
 * @return {boolean} Whether element is visible.
 */

function isVisible(element) {
  return element.offsetWidth > 0 || element.offsetHeight > 0 || element.getClientRects().length > 0;
}
/**
 * Returns true if the specified area element is a valid focusable element, or
 * false otherwise. Area is only focusable if within a map where a named map
 * referenced by an image somewhere in the document.
 *
 * @param {Element} element DOM area element to test.
 *
 * @return {boolean} Whether area element is valid for focus.
 */


function isValidFocusableArea(element) {
  var map = element.closest('map[name]');

  if (!map) {
    return false;
  }

  var img = document.querySelector('img[usemap="#' + map.name + '"]');
  return !!img && isVisible(img);
}
/**
 * Returns all focusable elements within a given context.
 *
 * @param {Element} context Element in which to search.
 *
 * @return {Element[]} Focusable elements.
 */


function find(context) {
  var elements = context.querySelectorAll(SELECTOR);
  return Object(toConsumableArray["a" /* default */])(elements).filter(function (element) {
    if (!isVisible(element)) {
      return false;
    }

    var nodeName = element.nodeName;

    if ('AREA' === nodeName) {
      return isValidFocusableArea(element);
    }

    return true;
  });
}

// EXTERNAL MODULE: external "lodash"
var external_lodash_ = __webpack_require__(2);

// CONCATENATED MODULE: ./node_modules/@wordpress/dom/build-module/tabbable.js
/**
 * External dependencies
 */

/**
 * Internal dependencies
 */


/**
 * Returns the tab index of the given element. In contrast with the tabIndex
 * property, this normalizes the default (0) to avoid browser inconsistencies,
 * operating under the assumption that this function is only ever called with a
 * focusable node.
 *
 * @see https://bugzilla.mozilla.org/show_bug.cgi?id=1190261
 *
 * @param {Element} element Element from which to retrieve.
 *
 * @return {?number} Tab index of element (default 0).
 */

function getTabIndex(element) {
  var tabIndex = element.getAttribute('tabindex');
  return tabIndex === null ? 0 : parseInt(tabIndex, 10);
}
/**
 * Returns true if the specified element is tabbable, or false otherwise.
 *
 * @param {Element} element Element to test.
 *
 * @return {boolean} Whether element is tabbable.
 */


function isTabbableIndex(element) {
  return getTabIndex(element) !== -1;
}
/**
 * Returns a stateful reducer function which constructs a filtered array of
 * tabbable elements, where at most one radio input is selected for a given
 * name, giving priority to checked input, falling back to the first
 * encountered.
 *
 * @return {Function} Radio group collapse reducer.
 */

function createStatefulCollapseRadioGroup() {
  var CHOSEN_RADIO_BY_NAME = {};
  return function collapseRadioGroup(result, element) {
    var nodeName = element.nodeName,
        type = element.type,
        checked = element.checked,
        name = element.name; // For all non-radio tabbables, construct to array by concatenating.

    if (nodeName !== 'INPUT' || type !== 'radio' || !name) {
      return result.concat(element);
    }

    var hasChosen = CHOSEN_RADIO_BY_NAME.hasOwnProperty(name); // Omit by skipping concatenation if the radio element is not chosen.

    var isChosen = checked || !hasChosen;

    if (!isChosen) {
      return result;
    } // At this point, if there had been a chosen element, the current
    // element is checked and should take priority. Retroactively remove
    // the element which had previously been considered the chosen one.


    if (hasChosen) {
      var hadChosenElement = CHOSEN_RADIO_BY_NAME[name];
      result = Object(external_lodash_["without"])(result, hadChosenElement);
    }

    CHOSEN_RADIO_BY_NAME[name] = element;
    return result.concat(element);
  };
}
/**
 * An array map callback, returning an object with the element value and its
 * array index location as properties. This is used to emulate a proper stable
 * sort where equal tabIndex should be left in order of their occurrence in the
 * document.
 *
 * @param {Element} element Element.
 * @param {number}  index   Array index of element.
 *
 * @return {Object} Mapped object with element, index.
 */


function mapElementToObjectTabbable(element, index) {
  return {
    element: element,
    index: index
  };
}
/**
 * An array map callback, returning an element of the given mapped object's
 * element value.
 *
 * @param {Object} object Mapped object with index.
 *
 * @return {Element} Mapped object element.
 */


function mapObjectTabbableToElement(object) {
  return object.element;
}
/**
 * A sort comparator function used in comparing two objects of mapped elements.
 *
 * @see mapElementToObjectTabbable
 *
 * @param {Object} a First object to compare.
 * @param {Object} b Second object to compare.
 *
 * @return {number} Comparator result.
 */


function compareObjectTabbables(a, b) {
  var aTabIndex = getTabIndex(a.element);
  var bTabIndex = getTabIndex(b.element);

  if (aTabIndex === bTabIndex) {
    return a.index - b.index;
  }

  return aTabIndex - bTabIndex;
}

function tabbable_find(context) {
  return find(context).filter(isTabbableIndex).map(mapElementToObjectTabbable).sort(compareObjectTabbables).map(mapObjectTabbableToElement).reduce(createStatefulCollapseRadioGroup(), []);
}

// CONCATENATED MODULE: ./node_modules/@wordpress/dom/build-module/dom.js
/**
 * External dependencies
 */

/**
 * Browser dependencies
 */

var _window = window,
    getComputedStyle = _window.getComputedStyle;
var _window$Node = window.Node,
    TEXT_NODE = _window$Node.TEXT_NODE,
    ELEMENT_NODE = _window$Node.ELEMENT_NODE,
    DOCUMENT_POSITION_PRECEDING = _window$Node.DOCUMENT_POSITION_PRECEDING,
    DOCUMENT_POSITION_FOLLOWING = _window$Node.DOCUMENT_POSITION_FOLLOWING;
/**
 * Returns true if the given selection object is in the forward direction, or
 * false otherwise.
 *
 * @see https://developer.mozilla.org/en-US/docs/Web/API/Node/compareDocumentPosition
 *
 * @param {Selection} selection Selection object to check.
 *
 * @return {boolean} Whether the selection is forward.
 */

function isSelectionForward(selection) {
  var anchorNode = selection.anchorNode,
      focusNode = selection.focusNode,
      anchorOffset = selection.anchorOffset,
      focusOffset = selection.focusOffset;
  var position = anchorNode.compareDocumentPosition(focusNode); // Disable reason: `Node#compareDocumentPosition` returns a bitmask value,
  // so bitwise operators are intended.

  /* eslint-disable no-bitwise */
  // Compare whether anchor node precedes focus node. If focus node (where
  // end of selection occurs) is after the anchor node, it is forward.

  if (position & DOCUMENT_POSITION_PRECEDING) {
    return false;
  }

  if (position & DOCUMENT_POSITION_FOLLOWING) {
    return true;
  }
  /* eslint-enable no-bitwise */
  // `compareDocumentPosition` returns 0 when passed the same node, in which
  // case compare offsets.


  if (position === 0) {
    return anchorOffset <= focusOffset;
  } // This should never be reached, but return true as default case.


  return true;
}
/**
 * Check whether the selection is at the edge of the container. Checks for
 * horizontal position by default. Set `onlyVertical` to true to check only
 * vertically.
 *
 * @param {Element} container    Focusable element.
 * @param {boolean} isReverse    Set to true to check left, false to check right.
 * @param {boolean} onlyVertical Set to true to check only vertical position.
 *
 * @return {boolean} True if at the edge, false if not.
 */


function isEdge(container, isReverse, onlyVertical) {
  if (Object(external_lodash_["includes"])(['INPUT', 'TEXTAREA'], container.tagName)) {
    if (container.selectionStart !== container.selectionEnd) {
      return false;
    }

    if (isReverse) {
      return container.selectionStart === 0;
    }

    return container.value.length === container.selectionStart;
  }

  if (!container.isContentEditable) {
    return true;
  }

  var selection = window.getSelection();

  if (!selection.rangeCount) {
    return false;
  }

  var range = selection.getRangeAt(0).cloneRange();
  var isForward = isSelectionForward(selection);
  var isCollapsed = selection.isCollapsed; // Collapse in direction of selection.

  if (!isCollapsed) {
    range.collapse(!isForward);
  }

  var rangeRect = getRectangleFromRange(range);

  if (!rangeRect) {
    return false;
  }

  var computedStyle = window.getComputedStyle(container);
  var lineHeight = parseInt(computedStyle.lineHeight, 10) || 0; // Only consider the multiline selection at the edge if the direction is
  // towards the edge.

  if (!isCollapsed && rangeRect.height > lineHeight && isForward === isReverse) {
    return false;
  }

  var padding = parseInt(computedStyle["padding".concat(isReverse ? 'Top' : 'Bottom')], 10) || 0; // Calculate a buffer that is half the line height. In some browsers, the
  // selection rectangle may not fill the entire height of the line, so we add
  // 3/4 the line height to the selection rectangle to ensure that it is well
  // over its line boundary.

  var buffer = 3 * parseInt(lineHeight, 10) / 4;
  var containerRect = container.getBoundingClientRect();
  var verticalEdge = isReverse ? containerRect.top + padding > rangeRect.top - buffer : containerRect.bottom - padding < rangeRect.bottom + buffer;

  if (!verticalEdge) {
    return false;
  }

  if (onlyVertical) {
    return true;
  } // In the case of RTL scripts, the horizontal edge is at the opposite side.


  var direction = computedStyle.direction;
  var isReverseDir = direction === 'rtl' ? !isReverse : isReverse; // To calculate the horizontal position, we insert a test range and see if
  // this test range has the same horizontal position. This method proves to
  // be better than a DOM-based calculation, because it ignores empty text
  // nodes and a trailing line break element. In other words, we need to check
  // visual positioning, not DOM positioning.

  var x = isReverseDir ? containerRect.left + 1 : containerRect.right - 1;
  var y = isReverse ? containerRect.top + buffer : containerRect.bottom - buffer;
  var testRange = hiddenCaretRangeFromPoint(document, x, y, container);

  if (!testRange) {
    return false;
  }

  var side = isReverseDir ? 'left' : 'right';
  var testRect = getRectangleFromRange(testRange);
  return Math.round(testRect[side]) === Math.round(rangeRect[side]);
}
/**
 * Check whether the selection is horizontally at the edge of the container.
 *
 * @param {Element} container Focusable element.
 * @param {boolean} isReverse Set to true to check left, false for right.
 *
 * @return {boolean} True if at the horizontal edge, false if not.
 */


function isHorizontalEdge(container, isReverse) {
  return isEdge(container, isReverse);
}
/**
 * Check whether the selection is vertically at the edge of the container.
 *
 * @param {Element} container Focusable element.
 * @param {boolean} isReverse Set to true to check top, false for bottom.
 *
 * @return {boolean} True if at the vertical edge, false if not.
 */

function isVerticalEdge(container, isReverse) {
  return isEdge(container, isReverse, true);
}
/**
 * Get the rectangle of a given Range.
 *
 * @param {Range} range The range.
 *
 * @return {DOMRect} The rectangle.
 */

function getRectangleFromRange(range) {
  // For uncollapsed ranges, get the rectangle that bounds the contents of the
  // range; this a rectangle enclosing the union of the bounding rectangles
  // for all the elements in the range.
  if (!range.collapsed) {
    return range.getBoundingClientRect();
  }

  var _range = range,
      startContainer = _range.startContainer; // Correct invalid "BR" ranges. The cannot contain any children.

  if (startContainer.nodeName === 'BR') {
    var parentNode = startContainer.parentNode;
    var index = Array.from(parentNode.childNodes).indexOf(startContainer);
    range = document.createRange();
    range.setStart(parentNode, index);
    range.setEnd(parentNode, index);
  }

  var rect = range.getClientRects()[0]; // If the collapsed range starts (and therefore ends) at an element node,
  // `getClientRects` can be empty in some browsers. This can be resolved
  // by adding a temporary text node with zero-width space to the range.
  //
  // See: https://stackoverflow.com/a/6847328/995445

  if (!rect) {
    var padNode = document.createTextNode("\u200B"); // Do not modify the live range.

    range = range.cloneRange();
    range.insertNode(padNode);
    rect = range.getClientRects()[0];
    padNode.parentNode.removeChild(padNode);
  }

  return rect;
}
/**
 * Get the rectangle for the selection in a container.
 *
 * @param {Element} container Editable container.
 *
 * @return {?DOMRect} The rectangle.
 */

function computeCaretRect(container) {
  if (!container.isContentEditable) {
    return;
  }

  var selection = window.getSelection();
  var range = selection.rangeCount ? selection.getRangeAt(0) : null;

  if (!range) {
    return;
  }

  return getRectangleFromRange(range);
}
/**
 * Places the caret at start or end of a given element.
 *
 * @param {Element} container Focusable element.
 * @param {boolean} isReverse True for end, false for start.
 */

function placeCaretAtHorizontalEdge(container, isReverse) {
  if (!container) {
    return;
  }

  if (Object(external_lodash_["includes"])(['INPUT', 'TEXTAREA'], container.tagName)) {
    container.focus();

    if (isReverse) {
      container.selectionStart = container.value.length;
      container.selectionEnd = container.value.length;
    } else {
      container.selectionStart = 0;
      container.selectionEnd = 0;
    }

    return;
  }

  container.focus();

  if (!container.isContentEditable) {
    return;
  } // Select on extent child of the container, not the container itself. This
  // avoids the selection always being `endOffset` of 1 when placed at end,
  // where `startContainer`, `endContainer` would always be container itself.


  var rangeTarget = container[isReverse ? 'lastChild' : 'firstChild']; // If no range target, it implies that the container is empty. Focusing is
  // sufficient for caret to be placed correctly.

  if (!rangeTarget) {
    return;
  }

  var selection = window.getSelection();
  var range = document.createRange();
  range.selectNodeContents(rangeTarget);
  range.collapse(!isReverse);
  selection.removeAllRanges();
  selection.addRange(range);
}
/**
 * Polyfill.
 * Get a collapsed range for a given point.
 *
 * @see https://developer.mozilla.org/en-US/docs/Web/API/Document/caretRangeFromPoint
 *
 * @param {Document} doc The document of the range.
 * @param {number}    x   Horizontal position within the current viewport.
 * @param {number}    y   Vertical position within the current viewport.
 *
 * @return {?Range} The best range for the given point.
 */

function caretRangeFromPoint(doc, x, y) {
  if (doc.caretRangeFromPoint) {
    return doc.caretRangeFromPoint(x, y);
  }

  if (!doc.caretPositionFromPoint) {
    return null;
  }

  var point = doc.caretPositionFromPoint(x, y); // If x or y are negative, outside viewport, or there is no text entry node.
  // https://developer.mozilla.org/en-US/docs/Web/API/Document/caretRangeFromPoint

  if (!point) {
    return null;
  }

  var range = doc.createRange();
  range.setStart(point.offsetNode, point.offset);
  range.collapse(true);
  return range;
}
/**
 * Get a collapsed range for a given point.
 * Gives the container a temporary high z-index (above any UI).
 * This is preferred over getting the UI nodes and set styles there.
 *
 * @param {Document} doc       The document of the range.
 * @param {number}    x         Horizontal position within the current viewport.
 * @param {number}    y         Vertical position within the current viewport.
 * @param {Element}  container Container in which the range is expected to be found.
 *
 * @return {?Range} The best range for the given point.
 */


function hiddenCaretRangeFromPoint(doc, x, y, container) {
  container.style.zIndex = '10000';
  var range = caretRangeFromPoint(doc, x, y);
  container.style.zIndex = null;
  return range;
}
/**
 * Places the caret at the top or bottom of a given element.
 *
 * @param {Element} container           Focusable element.
 * @param {boolean} isReverse           True for bottom, false for top.
 * @param {DOMRect} [rect]              The rectangle to position the caret with.
 * @param {boolean} [mayUseScroll=true] True to allow scrolling, false to disallow.
 */


function placeCaretAtVerticalEdge(container, isReverse, rect) {
  var mayUseScroll = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : true;

  if (!container) {
    return;
  }

  if (!rect || !container.isContentEditable) {
    placeCaretAtHorizontalEdge(container, isReverse);
    return;
  } // Offset by a buffer half the height of the caret rect. This is needed
  // because caretRangeFromPoint may default to the end of the selection if
  // offset is too close to the edge. It's unclear how to precisely calculate
  // this threshold; it may be the padded area of some combination of line
  // height, caret height, and font size. The buffer offset is effectively
  // equivalent to a point at half the height of a line of text.


  var buffer = rect.height / 2;
  var editableRect = container.getBoundingClientRect();
  var x = rect.left;
  var y = isReverse ? editableRect.bottom - buffer : editableRect.top + buffer;
  var range = hiddenCaretRangeFromPoint(document, x, y, container);

  if (!range || !container.contains(range.startContainer)) {
    if (mayUseScroll && (!range || !range.startContainer || !range.startContainer.contains(container))) {
      // Might be out of view.
      // Easier than attempting to calculate manually.
      container.scrollIntoView(isReverse);
      placeCaretAtVerticalEdge(container, isReverse, rect, false);
      return;
    }

    placeCaretAtHorizontalEdge(container, isReverse);
    return;
  } // Check if the closest text node is actually further away.
  // If so, attempt to get the range again with the y position adjusted to get the right offset.


  if (range.startContainer.nodeType === TEXT_NODE) {
    var parentNode = range.startContainer.parentNode;
    var parentRect = parentNode.getBoundingClientRect();
    var side = isReverse ? 'bottom' : 'top';
    var padding = parseInt(getComputedStyle(parentNode).getPropertyValue("padding-".concat(side)), 10) || 0;
    var actualY = isReverse ? parentRect.bottom - padding - buffer : parentRect.top + padding + buffer;

    if (y !== actualY) {
      range = hiddenCaretRangeFromPoint(document, x, actualY, container);
    }
  }

  var selection = window.getSelection();
  selection.removeAllRanges();
  selection.addRange(range);
  container.focus(); // Editable was already focussed, it goes back to old range...
  // This fixes it.

  selection.removeAllRanges();
  selection.addRange(range);
}
/**
 * Check whether the given element is a text field, where text field is defined
 * by the ability to select within the input, or that it is contenteditable.
 *
 * See: https://html.spec.whatwg.org/#textFieldSelection
 *
 * @param {HTMLElement} element The HTML element.
 *
 * @return {boolean} True if the element is an text field, false if not.
 */

function isTextField(element) {
  try {
    var nodeName = element.nodeName,
        selectionStart = element.selectionStart,
        contentEditable = element.contentEditable;
    return nodeName === 'INPUT' && selectionStart !== null || nodeName === 'TEXTAREA' || contentEditable === 'true';
  } catch (error) {
    // Safari throws an exception when trying to get `selectionStart`
    // on non-text <input> elements (which, understandably, don't
    // have the text selection API). We catch this via a try/catch
    // block, as opposed to a more explicit check of the element's
    // input types, because of Safari's non-standard behavior. This
    // also means we don't have to worry about the list of input
    // types that support `selectionStart` changing as the HTML spec
    // evolves over time.
    return false;
  }
}
/**
 * Check wether the current document has a selection.
 * This checks both for focus in an input field and general text selection.
 *
 * @return {boolean} True if there is selection, false if not.
 */

function documentHasSelection() {
  if (isTextField(document.activeElement)) {
    return true;
  }

  var selection = window.getSelection();
  var range = selection.rangeCount ? selection.getRangeAt(0) : null;
  return range && !range.collapsed;
}
/**
 * Check whether the contents of the element have been entirely selected.
 * Returns true if there is no possibility of selection.
 *
 * @param {Element} element The element to check.
 *
 * @return {boolean} True if entirely selected, false if not.
 */

function isEntirelySelected(element) {
  if (Object(external_lodash_["includes"])(['INPUT', 'TEXTAREA'], element.nodeName)) {
    return element.selectionStart === 0 && element.value.length === element.selectionEnd;
  }

  if (!element.isContentEditable) {
    return true;
  }

  var selection = window.getSelection();
  var range = selection.rangeCount ? selection.getRangeAt(0) : null;

  if (!range) {
    return true;
  }

  var startContainer = range.startContainer,
      endContainer = range.endContainer,
      startOffset = range.startOffset,
      endOffset = range.endOffset;

  if (startContainer === element && endContainer === element && startOffset === 0 && endOffset === element.childNodes.length) {
    return true;
  }

  var lastChild = element.lastChild;
  var lastChildContentLength = lastChild.nodeType === TEXT_NODE ? lastChild.data.length : lastChild.childNodes.length;
  return startContainer === element.firstChild && endContainer === element.lastChild && startOffset === 0 && endOffset === lastChildContentLength;
}
/**
 * Given a DOM node, finds the closest scrollable container node.
 *
 * @param {Element} node Node from which to start.
 *
 * @return {?Element} Scrollable container node, if found.
 */

function getScrollContainer(node) {
  if (!node) {
    return;
  } // Scrollable if scrollable height exceeds displayed...


  if (node.scrollHeight > node.clientHeight) {
    // ...except when overflow is defined to be hidden or visible
    var _window$getComputedSt = window.getComputedStyle(node),
        overflowY = _window$getComputedSt.overflowY;

    if (/(auto|scroll)/.test(overflowY)) {
      return node;
    }
  } // Continue traversing


  return getScrollContainer(node.parentNode);
}
/**
 * Returns the closest positioned element, or null under any of the conditions
 * of the offsetParent specification. Unlike offsetParent, this function is not
 * limited to HTMLElement and accepts any Node (e.g. Node.TEXT_NODE).
 *
 * @see https://drafts.csswg.org/cssom-view/#dom-htmlelement-offsetparent
 *
 * @param {Node} node Node from which to find offset parent.
 *
 * @return {?Node} Offset parent.
 */

function getOffsetParent(node) {
  // Cannot retrieve computed style or offset parent only anything other than
  // an element node, so find the closest element node.
  var closestElement;

  while (closestElement = node.parentNode) {
    if (closestElement.nodeType === ELEMENT_NODE) {
      break;
    }
  }

  if (!closestElement) {
    return null;
  } // If the closest element is already positioned, return it, as offsetParent
  // does not otherwise consider the node itself.


  if (getComputedStyle(closestElement).position !== 'static') {
    return closestElement;
  }

  return closestElement.offsetParent;
}
/**
 * Given two DOM nodes, replaces the former with the latter in the DOM.
 *
 * @param {Element} processedNode Node to be removed.
 * @param {Element} newNode       Node to be inserted in its place.
 * @return {void}
 */

function replace(processedNode, newNode) {
  insertAfter(newNode, processedNode.parentNode);
  remove(processedNode);
}
/**
 * Given a DOM node, removes it from the DOM.
 *
 * @param {Element} node Node to be removed.
 * @return {void}
 */

function remove(node) {
  node.parentNode.removeChild(node);
}
/**
 * Given two DOM nodes, inserts the former in the DOM as the next sibling of
 * the latter.
 *
 * @param {Element} newNode       Node to be inserted.
 * @param {Element} referenceNode Node after which to perform the insertion.
 * @return {void}
 */

function insertAfter(newNode, referenceNode) {
  referenceNode.parentNode.insertBefore(newNode, referenceNode.nextSibling);
}
/**
 * Unwrap the given node. This means any child nodes are moved to the parent.
 *
 * @param {Node} node The node to unwrap.
 *
 * @return {void}
 */

function unwrap(node) {
  var parent = node.parentNode;

  while (node.firstChild) {
    parent.insertBefore(node.firstChild, node);
  }

  parent.removeChild(node);
}
/**
 * Replaces the given node with a new node with the given tag name.
 *
 * @param {Element}  node    The node to replace
 * @param {string}   tagName The new tag name.
 *
 * @return {Element} The new node.
 */

function replaceTag(node, tagName) {
  var newNode = node.ownerDocument.createElement(tagName);

  while (node.firstChild) {
    newNode.appendChild(node.firstChild);
  }

  node.parentNode.replaceChild(newNode, node);
  return newNode;
}
/**
 * Wraps the given node with a new node with the given tag name.
 *
 * @param {Element} newNode       The node to insert.
 * @param {Element} referenceNode The node to wrap.
 */

function wrap(newNode, referenceNode) {
  referenceNode.parentNode.insertBefore(newNode, referenceNode);
  newNode.appendChild(referenceNode);
}

// CONCATENATED MODULE: ./node_modules/@wordpress/dom/build-module/index.js
/**
 * Internal dependencies
 */


/**
 * Object grouping `focusable` and `tabbable` utils
 * under the keys with the same name.
 */

var build_module_focus = {
  focusable: focusable_namespaceObject,
  tabbable: tabbable_namespaceObject
};



/***/ })

/******/ });