dropdeck-slate-react/dist/index.js

Tools for building completely customizable richtext editors with React.

'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

var React = require('react');
var slate = require('slate');
var throttle = require('lodash/throttle');
var scrollIntoView = require('scroll-into-view-if-needed');
var getDirection = require('direction');
var isHotkey = require('is-hotkey');
var ReactDOM = require('react-dom');

function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e : { 'default': e }; }

var React__default = /*#__PURE__*/_interopDefaultLegacy(React);
var throttle__default = /*#__PURE__*/_interopDefaultLegacy(throttle);
var scrollIntoView__default = /*#__PURE__*/_interopDefaultLegacy(scrollIntoView);
var getDirection__default = /*#__PURE__*/_interopDefaultLegacy(getDirection);
var ReactDOM__default = /*#__PURE__*/_interopDefaultLegacy(ReactDOM);

function _defineProperty(obj, key, value) {
  if (key in obj) {
    Object.defineProperty(obj, key, {
      value: value,
      enumerable: true,
      configurable: true,
      writable: true
    });
  } else {
    obj[key] = value;
  }

  return obj;
}

var defineProperty = _defineProperty;

function _arrayWithHoles(arr) {
  if (Array.isArray(arr)) return arr;
}

var arrayWithHoles = _arrayWithHoles;

function _iterableToArrayLimit(arr, i) {
  if (!(Symbol.iterator in Object(arr) || Object.prototype.toString.call(arr) === "[object Arguments]")) {
    return;
  }

  var _arr = [];
  var _n = true;
  var _d = false;
  var _e = undefined;

  try {
    for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {
      _arr.push(_s.value);

      if (i && _arr.length === i) break;
    }
  } catch (err) {
    _d = true;
    _e = err;
  } finally {
    try {
      if (!_n && _i["return"] != null) _i["return"]();
    } finally {
      if (_d) throw _e;
    }
  }

  return _arr;
}

var iterableToArrayLimit = _iterableToArrayLimit;

function _nonIterableRest() {
  throw new TypeError("Invalid attempt to destructure non-iterable instance");
}

var nonIterableRest = _nonIterableRest;

function _slicedToArray(arr, i) {
  return arrayWithHoles(arr) || iterableToArrayLimit(arr, i) || nonIterableRest();
}

var slicedToArray = _slicedToArray;

function _objectWithoutPropertiesLoose(source, excluded) {
  if (source == null) return {};
  var target = {};
  var sourceKeys = Object.keys(source);
  var key, i;

  for (i = 0; i < sourceKeys.length; i++) {
    key = sourceKeys[i];
    if (excluded.indexOf(key) >= 0) continue;
    target[key] = source[key];
  }

  return target;
}

var objectWithoutPropertiesLoose = _objectWithoutPropertiesLoose;

function _objectWithoutProperties(source, excluded) {
  if (source == null) return {};
  var target = objectWithoutPropertiesLoose(source, excluded);
  var key, i;

  if (Object.getOwnPropertySymbols) {
    var sourceSymbolKeys = Object.getOwnPropertySymbols(source);

    for (i = 0; i < sourceSymbolKeys.length; i++) {
      key = sourceSymbolKeys[i];
      if (excluded.indexOf(key) >= 0) continue;
      if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue;
      target[key] = source[key];
    }
  }

  return target;
}

var objectWithoutProperties = _objectWithoutProperties;

/**
 * Leaf content strings.
 */

var String = function String(props) {
  var isLast = props.isLast,
      leaf = props.leaf,
      parent = props.parent,
      text = props.text;
  var editor = useEditor();
  var path = ReactEditor.findPath(editor, text);
  var parentPath = slate.Path.parent(path); // COMPAT: Render text inside void nodes with a zero-width space.
  // So the node can contain selection but the text is not visible.

  if (editor.isVoid(parent)) {
    return React__default['default'].createElement(ZeroWidthString, {
      length: slate.Node.string(parent).length
    });
  } // COMPAT: If this is the last text node in an empty block, render a zero-
  // width space that will convert into a line break when copying and pasting
  // to support expected plain text.


  if (leaf.text === '' && parent.children[parent.children.length - 1] === text && !editor.isInline(parent) && slate.Editor.string(editor, parentPath) === '') {
    return React__default['default'].createElement(ZeroWidthString, {
      isLineBreak: true
    });
  } // COMPAT: If the text is empty, it's because it's on the edge of an inline
  // node, so we render a zero-width space so that the selection can be
  // inserted next to it still.


  if (leaf.text === '') {
    return React__default['default'].createElement(ZeroWidthString, null);
  } // COMPAT: Browsers will collapse trailing new lines at the end of blocks,
  // so we need to add an extra trailing new lines to prevent that.


  if (isLast && leaf.text.slice(-1) === '\n') {
    return React__default['default'].createElement(TextString, {
      isTrailing: true,
      text: leaf.text
    });
  }

  return React__default['default'].createElement(TextString, {
    text: leaf.text
  });
};
/**
 * Leaf strings with text in them.
 */


var TextString = function TextString(props) {
  var text = props.text,
      _props$isTrailing = props.isTrailing,
      isTrailing = _props$isTrailing === void 0 ? false : _props$isTrailing;
  return React__default['default'].createElement("span", {
    "data-slate-string": true
  }, text, isTrailing ? '\n' : null);
};
/**
 * Leaf strings without text, render as zero-width strings.
 */


var ZeroWidthString = function ZeroWidthString(props) {
  var _props$length = props.length,
      length = _props$length === void 0 ? 0 : _props$length,
      _props$isLineBreak = props.isLineBreak,
      isLineBreak = _props$isLineBreak === void 0 ? false : _props$isLineBreak;
  return React__default['default'].createElement("span", {
    "data-slate-zero-width": isLineBreak ? 'n' : 'z',
    "data-slate-length": length
  }, "\uFEFF", isLineBreak ? React__default['default'].createElement("br", null) : null);
};

/**
 * Two weak maps that allow us rebuild a path given a node. They are populated
 * at render time such that after a render occurs we can always backtrack.
 */
var NODE_TO_INDEX = new WeakMap();
var NODE_TO_PARENT = new WeakMap();
/**
 * Weak maps that allow us to go between Slate nodes and DOM nodes. These
 * are used to resolve DOM event-related logic into Slate actions.
 */

var EDITOR_TO_ELEMENT = new WeakMap();
var ELEMENT_TO_NODE = new WeakMap();
var KEY_TO_ELEMENT = new WeakMap();
var NODE_TO_ELEMENT = new WeakMap();
var NODE_TO_KEY = new WeakMap();
/**
 * Weak maps for storing editor-related state.
 */

var IS_READ_ONLY = new WeakMap();
var IS_FOCUSED = new WeakMap();
/**
 * Weak map for associating the context `onChange` context with the plugin.
 */

var EDITOR_TO_ON_CHANGE = new WeakMap();
/**
 * Symbols.
 */

var PLACEHOLDER_SYMBOL = Symbol('placeholder');

/**
 * Individual leaves in a text node with unique formatting.
 */

var Leaf = function Leaf(props) {
  var leaf = props.leaf,
      isLast = props.isLast,
      text = props.text,
      parent = props.parent,
      _props$renderLeaf = props.renderLeaf,
      renderLeaf = _props$renderLeaf === void 0 ? function (props) {
    return React__default['default'].createElement(DefaultLeaf, Object.assign({}, props));
  } : _props$renderLeaf;
  var children = React__default['default'].createElement(String, {
    isLast: isLast,
    leaf: leaf,
    parent: parent,
    text: text
  });

  if (leaf[PLACEHOLDER_SYMBOL]) {
    children = React__default['default'].createElement(React__default['default'].Fragment, null, React__default['default'].createElement("span", {
      contentEditable: false,
      style: {
        pointerEvents: 'none',
        display: 'inline-block',
        width: '0',
        maxWidth: '100%',
        whiteSpace: 'nowrap',
        opacity: '0.333',
        userSelect: 'none',
        fontStyle: 'normal',
        fontWeight: 'normal',
        textDecoration: 'none'
      }
    }, leaf.placeholder), children);
  } // COMPAT: Having the `data-` attributes on these leaf elements ensures that
  // in certain misbehaving browsers they aren't weirdly cloned/destroyed by
  // contenteditable behaviors. (2019/05/08)


  var attributes = {
    'data-slate-leaf': true
  };
  return renderLeaf({
    attributes: attributes,
    children: children,
    leaf: leaf,
    text: text
  });
};

var MemoizedLeaf = React__default['default'].memo(Leaf, function (prev, next) {
  return next.parent === prev.parent && next.isLast === prev.isLast && next.renderLeaf === prev.renderLeaf && next.text === prev.text && slate.Text.matches(next.leaf, prev.leaf);
});
/**
 * The default custom leaf renderer.
 */

var DefaultLeaf = function DefaultLeaf(props) {
  var attributes = props.attributes,
      children = props.children;
  return React__default['default'].createElement("span", Object.assign({}, attributes), children);
};

/**
 * Prevent warning on SSR by falling back to useEffect when window is not defined
 */

var useIsomorphicLayoutEffect = typeof window !== 'undefined' ? React.useLayoutEffect : React.useEffect;

/**
 * Text.
 */

var Text = function Text(props) {
  var decorations = props.decorations,
      isLast = props.isLast,
      parent = props.parent,
      renderLeaf = props.renderLeaf,
      text = props.text;
  var editor = useEditor();
  var ref = React.useRef(null);
  var leaves = slate.Text.decorations(text, decorations);
  var key = ReactEditor.findKey(editor, text);
  var children = [];

  for (var i = 0; i < leaves.length; i++) {
    var leaf = leaves[i];
    children.push(React__default['default'].createElement(MemoizedLeaf, {
      isLast: isLast && i === leaves.length - 1,
      key: "".concat(key.id, "-").concat(i),
      leaf: leaf,
      text: text,
      parent: parent,
      renderLeaf: renderLeaf
    }));
  } // Update element-related weak maps with the DOM element ref.


  useIsomorphicLayoutEffect(function () {
    if (ref.current) {
      KEY_TO_ELEMENT.set(key, ref.current);
      NODE_TO_ELEMENT.set(text, ref.current);
      ELEMENT_TO_NODE.set(ref.current, text);
    } else {
      KEY_TO_ELEMENT["delete"](key);
      NODE_TO_ELEMENT["delete"](text);
    }
  });
  return React__default['default'].createElement("span", {
    "data-slate-node": "text",
    ref: ref
  }, children);
};

var MemoizedText = React__default['default'].memo(Text, function (prev, next) {
  return next.parent === prev.parent && next.isLast === prev.isLast && next.renderLeaf === prev.renderLeaf && next.text === prev.text;
});

/**
 * A React context for sharing the `selected` state of an element.
 */

var SelectedContext = React.createContext(false);
/**
 * Get the current `selected` state of an element.
 */

var useSelected = function useSelected() {
  return React.useContext(SelectedContext);
};

/**
 * Element.
 */

var Element = function Element(props) {
  var decorate = props.decorate,
      decorations = props.decorations,
      element = props.element,
      _props$renderElement = props.renderElement,
      renderElement = _props$renderElement === void 0 ? function (p) {
    return React__default['default'].createElement(DefaultElement, Object.assign({}, p));
  } : _props$renderElement,
      renderLeaf = props.renderLeaf,
      selection = props.selection;
  var ref = React.useRef(null);
  var editor = useEditor();
  var readOnly = useReadOnly();
  var isInline = editor.isInline(element);
  var key = ReactEditor.findKey(editor, element);
  var children = React__default['default'].createElement(Children, {
    decorate: decorate,
    decorations: decorations,
    node: element,
    renderElement: renderElement,
    renderLeaf: renderLeaf,
    selection: selection
  }); // Attributes that the developer must mix into the element in their
  // custom node renderer component.

  var attributes = {
    'data-slate-node': 'element',
    ref: ref
  };

  if (isInline) {
    attributes['data-slate-inline'] = true;
  } // If it's a block node with inline children, add the proper `dir` attribute
  // for text direction.


  if (!isInline && slate.Editor.hasInlines(editor, element)) {
    var text = slate.Node.string(element);
    var dir = getDirection__default['default'](text);

    if (dir === 'rtl') {
      attributes.dir = dir;
    }
  } // If it's a void node, wrap the children in extra void-specific elements.


  if (slate.Editor.isVoid(editor, element)) {
    attributes['data-slate-void'] = true;

    if (!readOnly && isInline) {
      attributes.contentEditable = false;
    }

    var Tag = isInline ? 'span' : 'div';

    var _Node$texts = slate.Node.texts(element),
        _Node$texts2 = slicedToArray(_Node$texts, 1),
        _Node$texts2$ = slicedToArray(_Node$texts2[0], 1),
        _text = _Node$texts2$[0];

    children = readOnly ? null : React__default['default'].createElement(Tag, {
      "data-slate-spacer": true,
      style: {
        height: '0',
        color: 'transparent',
        outline: 'none',
        position: 'absolute'
      }
    }, React__default['default'].createElement(MemoizedText, {
      decorations: [],
      isLast: false,
      parent: element,
      text: _text
    }));
    NODE_TO_INDEX.set(_text, 0);
    NODE_TO_PARENT.set(_text, element);
  } // Update element-related weak maps with the DOM element ref.


  useIsomorphicLayoutEffect(function () {
    if (ref.current) {
      KEY_TO_ELEMENT.set(key, ref.current);
      NODE_TO_ELEMENT.set(element, ref.current);
      ELEMENT_TO_NODE.set(ref.current, element);
    } else {
      KEY_TO_ELEMENT["delete"](key);
      NODE_TO_ELEMENT["delete"](element);
    }
  });
  return React__default['default'].createElement(SelectedContext.Provider, {
    value: !!selection
  }, renderElement({
    attributes: attributes,
    children: children,
    element: element
  }));
};

var MemoizedElement = React__default['default'].memo(Element, function (prev, next) {
  return prev.decorate === next.decorate && prev.element === next.element && prev.renderElement === next.renderElement && prev.renderLeaf === next.renderLeaf && isRangeListEqual(prev.decorations, next.decorations) && (prev.selection === next.selection || !!prev.selection && !!next.selection && slate.Range.equals(prev.selection, next.selection));
});
/**
 * The default element renderer.
 */

var DefaultElement = function DefaultElement(props) {
  var attributes = props.attributes,
      children = props.children,
      element = props.element;
  var editor = useEditor();
  var Tag = editor.isInline(element) ? 'span' : 'div';
  return React__default['default'].createElement(Tag, Object.assign({}, attributes, {
    style: {
      position: 'relative'
    }
  }), children);
};
/**
 * Check if a list of ranges is equal to another.
 *
 * PERF: this requires the two lists to also have the ranges inside them in the
 * same order, but this is an okay constraint for us since decorations are
 * kept in order, and the odd case where they aren't is okay to re-render for.
 */

var isRangeListEqual = function isRangeListEqual(list, another) {
  if (list.length !== another.length) {
    return false;
  }

  for (var i = 0; i < list.length; i++) {
    var range = list[i];
    var other = another[i];

    if (!slate.Range.equals(range, other)) {
      return false;
    }
  }

  return true;
};

/**
 * A React context for sharing the editor object.
 */

var EditorContext = React.createContext(null);
/**
 * Get the current editor object from the React context.
 */

var useEditor = function useEditor() {
  var editor = React.useContext(EditorContext);

  if (!editor) {
    throw new Error("The `useEditor` hook must be used inside the <Slate> component's context.");
  }

  return editor;
};

/**
 * Children.
 */

var Children = function Children(props) {
  var decorate = props.decorate,
      decorations = props.decorations,
      node = props.node,
      renderElement = props.renderElement,
      renderLeaf = props.renderLeaf,
      selection = props.selection;
  var editor = useEditor();
  var path = ReactEditor.findPath(editor, node);
  var children = [];
  var isLeafBlock = slate.Element.isElement(node) && !editor.isInline(node) && slate.Editor.hasInlines(editor, node);

  for (var i = 0; i < node.children.length; i++) {
    var p = path.concat(i);
    var n = node.children[i];
    var key = ReactEditor.findKey(editor, n);
    var range = null;

    try {
      range = slate.Editor.range(editor, p);
    } catch (e) {
      console.log("Unable to get range for ".concat(JSON.stringify(p)), e);
    }

    var sel = selection && range && slate.Range.intersection(range, selection);
    var ds = decorate([n, p]);
    var _iteratorNormalCompletion = true;
    var _didIteratorError = false;
    var _iteratorError = undefined;

    try {
      for (var _iterator = decorations[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
        var dec = _step.value;
        var d = range && slate.Range.intersection(dec, range);

        if (d) {
          ds.push(d);
        }
      }
    } catch (err) {
      _didIteratorError = true;
      _iteratorError = err;
    } finally {
      try {
        if (!_iteratorNormalCompletion && _iterator["return"] != null) {
          _iterator["return"]();
        }
      } finally {
        if (_didIteratorError) {
          throw _iteratorError;
        }
      }
    }

    if (slate.Element.isElement(n)) {
      children.push(React__default['default'].createElement(MemoizedElement, {
        decorate: decorate,
        decorations: ds,
        element: n,
        key: key.id,
        renderElement: renderElement,
        renderLeaf: renderLeaf,
        selection: sel
      }));
    } else {
      children.push(React__default['default'].createElement(MemoizedText, {
        decorations: ds,
        key: key.id,
        isLast: isLeafBlock && i === node.children.length - 1,
        parent: node,
        renderLeaf: renderLeaf,
        text: n
      }));
    }

    NODE_TO_INDEX.set(n, i);
    NODE_TO_PARENT.set(n, node);
  }

  return React__default['default'].createElement(React__default['default'].Fragment, null, children);
};

var IS_IOS = typeof navigator !== 'undefined' && typeof window !== 'undefined' && /iPad|iPhone|iPod/.test(navigator.userAgent) && !window.MSStream;
var IS_APPLE = typeof navigator !== 'undefined' && /Mac OS X/.test(navigator.userAgent);
var IS_FIREFOX = typeof navigator !== 'undefined' && /^(?!.*Seamonkey)(?=.*Firefox).*/i.test(navigator.userAgent);
var IS_SAFARI = typeof navigator !== 'undefined' && /Version\/[\d\.]+.*Safari/.test(navigator.userAgent); // "modern" Edge was released at 79.x

var IS_EDGE_LEGACY = typeof navigator !== 'undefined' && /Edge?\/(?:[0-6][0-9]|[0-7][0-8])(?:\.)/i.test(navigator.userAgent); // Native beforeInput events don't work well with react on Chrome 75 and older, Chrome 76+ can use beforeInput

var IS_CHROME_LEGACY = typeof navigator !== 'undefined' && /Chrome?\/(?:[0-7][0-5]|[0-6][0-9])(?:\.)/i.test(navigator.userAgent); // Firefox did not support `beforeInput` until `v87`.

var IS_FIREFOX_LEGACY = typeof navigator !== 'undefined' && /^(?!.*Seamonkey)(?=.*Firefox\/(?:[0-7][0-9]|[0-8][0-6])(?:\.)).*/i.test(navigator.userAgent);

/**
 * Hotkey mappings for each platform.
 */

var HOTKEYS = {
  bold: 'mod+b',
  compose: ['down', 'left', 'right', 'up', 'backspace', 'enter'],
  moveBackward: 'left',
  moveForward: 'right',
  moveWordBackward: 'ctrl+left',
  moveWordForward: 'ctrl+right',
  deleteBackward: 'shift?+backspace',
  deleteForward: 'shift?+delete',
  extendBackward: 'shift+left',
  extendForward: 'shift+right',
  italic: 'mod+i',
  splitBlock: 'shift?+enter',
  undo: 'mod+z'
};
var APPLE_HOTKEYS = {
  moveLineBackward: 'opt+up',
  moveLineForward: 'opt+down',
  moveWordBackward: 'opt+left',
  moveWordForward: 'opt+right',
  deleteBackward: ['ctrl+backspace', 'ctrl+h'],
  deleteForward: ['ctrl+delete', 'ctrl+d'],
  deleteLineBackward: 'cmd+shift?+backspace',
  deleteLineForward: ['cmd+shift?+delete', 'ctrl+k'],
  deleteWordBackward: 'opt+shift?+backspace',
  deleteWordForward: 'opt+shift?+delete',
  extendLineBackward: 'opt+shift+up',
  extendLineForward: 'opt+shift+down',
  redo: 'cmd+shift+z',
  transposeCharacter: 'ctrl+t'
};
var WINDOWS_HOTKEYS = {
  deleteWordBackward: 'ctrl+shift?+backspace',
  deleteWordForward: 'ctrl+shift?+delete',
  redo: ['ctrl+y', 'ctrl+shift+z']
};
/**
 * Create a platform-aware hotkey checker.
 */

var create = function create(key) {
  var generic = HOTKEYS[key];
  var apple = APPLE_HOTKEYS[key];
  var windows = WINDOWS_HOTKEYS[key];
  var isGeneric = generic && isHotkey.isKeyHotkey(generic);
  var isApple = apple && isHotkey.isKeyHotkey(apple);
  var isWindows = windows && isHotkey.isKeyHotkey(windows);
  return function (event) {
    if (isGeneric && isGeneric(event)) return true;
    if (IS_APPLE && isApple && isApple(event)) return true;
    if (!IS_APPLE && isWindows && isWindows(event)) return true;
    return false;
  };
};
/**
 * Hotkeys.
 */


var Hotkeys = {
  isBold: create('bold'),
  isCompose: create('compose'),
  isMoveBackward: create('moveBackward'),
  isMoveForward: create('moveForward'),
  isDeleteBackward: create('deleteBackward'),
  isDeleteForward: create('deleteForward'),
  isDeleteLineBackward: create('deleteLineBackward'),
  isDeleteLineForward: create('deleteLineForward'),
  isDeleteWordBackward: create('deleteWordBackward'),
  isDeleteWordForward: create('deleteWordForward'),
  isExtendBackward: create('extendBackward'),
  isExtendForward: create('extendForward'),
  isExtendLineBackward: create('extendLineBackward'),
  isExtendLineForward: create('extendLineForward'),
  isItalic: create('italic'),
  isMoveLineBackward: create('moveLineBackward'),
  isMoveLineForward: create('moveLineForward'),
  isMoveWordBackward: create('moveWordBackward'),
  isMoveWordForward: create('moveWordForward'),
  isRedo: create('redo'),
  isSplitBlock: create('splitBlock'),
  isTransposeCharacter: create('transposeCharacter'),
  isUndo: create('undo')
};

/**
 * A React context for sharing the `readOnly` state of the editor.
 */

var ReadOnlyContext = React.createContext(false);
/**
 * Get the current `readOnly` state of the editor.
 */

var useReadOnly = function useReadOnly() {
  return React.useContext(ReadOnlyContext);
};

/**
 * A React context for sharing the editor object, in a way that re-renders the
 * context whenever changes occur.
 */

var SlateContext = React.createContext(null);
/**
 * Get the current editor object from the React context.
 */

var useSlate = function useSlate() {
  var context = React.useContext(SlateContext);

  if (!context) {
    throw new Error("The `useSlate` hook must be used inside the <SlateProvider> component's context.");
  }

  var _context = slicedToArray(context, 1),
      editor = _context[0];

  return editor;
};

/**
 * Check if a DOM node is a comment node.
 */

var isDOMComment = function isDOMComment(value) {
  return isDOMNode(value) && value.nodeType === 8;
};
/**
 * Check if a DOM node is an element node.
 */

var isDOMElement = function isDOMElement(value) {
  return isDOMNode(value) && value.nodeType === 1;
};
/**
 * Check if a value is a DOM node.
 */

var isDOMNode = function isDOMNode(value) {
  return value instanceof Node;
};
/**
 * Check if a DOM node is an element node.
 */

var isDOMText = function isDOMText(value) {
  return isDOMNode(value) && value.nodeType === 3;
};
/**
 * Checks whether a paste event is a plaintext-only event.
 */

var isPlainTextOnlyPaste = function isPlainTextOnlyPaste(event) {
  return event.clipboardData && event.clipboardData.getData('text/plain') !== '' && event.clipboardData.types.length === 1;
};
/**
 * Normalize a DOM point so that it always refers to a text node.
 */

var normalizeDOMPoint = function normalizeDOMPoint(domPoint) {
  var _domPoint = slicedToArray(domPoint, 2),
      node = _domPoint[0],
      offset = _domPoint[1]; // If it's an element node, its offset refers to the index of its children
  // including comment nodes, so try to find the right text child node.


  if (isDOMElement(node) && node.childNodes.length) {
    var isLast = offset === node.childNodes.length;
    var direction = isLast ? 'backward' : 'forward';
    var index = isLast ? offset - 1 : offset;
    node = getEditableChild(node, index, direction); // If the node has children, traverse until we have a leaf node. Leaf nodes
    // can be either text nodes, or other void DOM nodes.

    while (isDOMElement(node) && node.childNodes.length) {
      var i = isLast ? node.childNodes.length - 1 : 0;
      node = getEditableChild(node, i, direction);
    } // Determine the new offset inside the text node.


    offset = isLast && node.textContent != null ? node.textContent.length : 0;
  } // Return the node and offset.


  return [node, offset];
};
/**
 * Get the nearest editable child at `index` in a `parent`, preferring
 * `direction`.
 */

var getEditableChild = function getEditableChild(parent, index, direction) {
  var childNodes = parent.childNodes;
  var child = childNodes[index];
  var i = index;
  var triedForward = false;
  var triedBackward = false; // While the child is a comment node, or an element node with no children,
  // keep iterating to find a sibling non-void, non-comment node.

  while (isDOMComment(child) || isDOMElement(child) && child.childNodes.length === 0 || isDOMElement(child) && child.getAttribute('contenteditable') === 'false') {
    if (triedForward && triedBackward) {
      break;
    }

    if (i >= childNodes.length) {
      triedForward = true;
      i = index - 1;
      direction = 'backward';
      continue;
    }

    if (i < 0) {
      triedBackward = true;
      i = index + 1;
      direction = 'forward';
      continue;
    }

    child = childNodes[i];
    i += direction === 'forward' ? 1 : -1;
  }

  return child;
};
/**
 * Get a plaintext representation of the content of a node, accounting for block
 * elements which get a newline appended.
 *
 * The domNode must be attached to the DOM.
 */

var getPlainText = function getPlainText(domNode) {
  var text = '';

  if (isDOMText(domNode) && domNode.nodeValue) {
    return domNode.nodeValue;
  }

  if (isDOMElement(domNode)) {
    for (var _i = 0, _Array$from = Array.from(domNode.childNodes); _i < _Array$from.length; _i++) {
      var childNode = _Array$from[_i];
      text += getPlainText(childNode);
    }

    var display = getComputedStyle(domNode).getPropertyValue('display');

    if (display === 'block' || display === 'list' || domNode.tagName === 'BR') {
      text += '\n';
    }
  }

  return text;
};
/**
 * there is no way to create a reverse DOM Range using Range.setStart/setEnd
 * according to https://dom.spec.whatwg.org/#concept-range-bp-set.
 * Luckily it's possible to create a reverse selection via Selection.extend
 *
 * Note: Selection.extend is not implement in any version of IE (up to and including version 11)
 */

var setReverseDomSelection = function setReverseDomSelection(domRange, domSelection) {
  var newRange = domRange.cloneRange(); // collapses the range to end

  newRange.collapse(); // set both anchor and focus of the selection to domRange's focus

  domSelection.addRange(newRange); // moves the focus of the selection to domRange's anchor

  domSelection.extend(domRange.startContainer, domRange.startOffset);
};

function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); keys.push.apply(keys, symbols); } return keys; }

function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(Object(source), true).forEach(function (key) { defineProperty(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }
// Chrome Legacy doesn't support `beforeinput` correctly

var HAS_BEFORE_INPUT_SUPPORT = !(IS_FIREFOX || IS_EDGE_LEGACY || IS_CHROME_LEGACY);
/**
 * Editable.
 */

var Editable = function Editable(props) {
  var autoFocus = props.autoFocus,
      _props$decorate = props.decorate,
      decorate = _props$decorate === void 0 ? defaultDecorate : _props$decorate,
      propsOnDOMBeforeInput = props.onDOMBeforeInput,
      placeholder = props.placeholder,
      _props$readOnly = props.readOnly,
      readOnly = _props$readOnly === void 0 ? false : _props$readOnly,
      renderElement = props.renderElement,
      renderLeaf = props.renderLeaf,
      _props$style = props.style,
      style = _props$style === void 0 ? {} : _props$style,
      _props$as = props.as,
      Component = _props$as === void 0 ? 'div' : _props$as,
      attributes = objectWithoutProperties(props, ["autoFocus", "decorate", "onDOMBeforeInput", "placeholder", "readOnly", "renderElement", "renderLeaf", "style", "as"]);

  var editor = useSlate();
  var ref = React.useRef(null); // Update internal state on each render.

  IS_READ_ONLY.set(editor, readOnly); // Keep track of some state for the event handler logic.

  var state = React.useMemo(function () {
    return {
      isComposing: false,
      isUpdatingSelection: false,
      latestElement: null
    };
  }, []); // Update element-related weak maps with the DOM element ref.

  useIsomorphicLayoutEffect(function () {
    if (ref.current) {
      EDITOR_TO_ELEMENT.set(editor, ref.current);
      NODE_TO_ELEMENT.set(editor, ref.current);
      ELEMENT_TO_NODE.set(ref.current, editor);
    } else {
      NODE_TO_ELEMENT["delete"](editor);
    }
  }); // Whenever the editor updates, make sure the DOM selection state is in sync.

  useIsomorphicLayoutEffect(function () {
    var selection = editor.selection;
    var domSelection = window.getSelection();

    if (state.isComposing || !domSelection || !ReactEditor.isFocused(editor)) {
      return;
    }

    var hasDomSelection = domSelection.type !== 'None'; // If the DOM selection is properly unset, we're done.

    if (!selection && !hasDomSelection) {
      return;
    }

    var newDomRange = null;

    try {
      newDomRange = selection && ReactEditor.toDOMRange(editor, selection);
    } catch (e) {
      console.log("Unable to find a native DOM range from the current selection: ".concat(e));
    } // verify that the dom selection is in the editor


    var editorElement = EDITOR_TO_ELEMENT.get(editor);
    var hasDomSelectionInEditor = false;

    if (editorElement.contains(domSelection.anchorNode) && editorElement.contains(domSelection.focusNode)) {
      hasDomSelectionInEditor = true;
    } // If the DOM selection is in the editor and the editor selection is already correct, we're done.


    if (hasDomSelection && hasDomSelectionInEditor && selection && newDomRange && isRangeEqual(domSelection.getRangeAt(0), newDomRange) // Range.equals(ReactEditor.toSlateRange(editor, domSelection), selection)
    ) {
        return;
      } // Otherwise the DOM selection is out of sync, so update it.


    var el = ReactEditor.toDOMNode(editor, editor);
    state.isUpdatingSelection = true;
    domSelection.removeAllRanges();

    if (newDomRange) {
      if (slate.Range.isBackward(selection)) {
        setReverseDomSelection(newDomRange, domSelection);
      } else {
        domSelection.addRange(newDomRange);
      }

      var leafEl = newDomRange.startContainer.parentElement;
      scrollIntoView__default['default'](leafEl, {
        scrollMode: 'if-needed',
        boundary: el
      });
    }

    setTimeout(function () {
      // COMPAT: In Firefox, it's not enough to create a range, you also need
      // to focus the contenteditable element too. (2016/11/16)
      if (newDomRange && IS_FIREFOX) {
        el.focus();
      }

      state.isUpdatingSelection = false;
    });
  }); // The autoFocus TextareaHTMLAttribute doesn't do anything on a div, so it
  // needs to be manually focused.

  React.useEffect(function () {
    if (ref.current && autoFocus) {
      ref.current.focus();
    }
  }, [autoFocus]); // Listen on the native `beforeinput` event to get real "Level 2" events. This
  // is required because React's `beforeinput` is fake and never really attaches
  // to the real event sadly. (2019/11/01)
  // https://github.com/facebook/react/issues/11211

  var onDOMBeforeInput = React.useCallback(function (event) {
    if (!readOnly && hasEditableTarget(editor, event.target) && !isDOMEventHandled(event, propsOnDOMBeforeInput)) {
      var selection = editor.selection;
      var type = event.inputType;
      var data = event.dataTransfer || event.data || undefined; // These two types occur while a user is composing text and can't be
      // cancelled. Let them through and wait for the composition to end.

      if (type === 'insertCompositionText' || type === 'deleteCompositionText') {
        return;
      }

      event.preventDefault(); // COMPAT: For the deleting forward/backward input types we don't want
      // to change the selection because it is the range that will be deleted,
      // and those commands determine that for themselves.

      if (!type.startsWith('delete') || type.startsWith('deleteBy')) {
        var _event$getTargetRange = event.getTargetRanges(),
            _event$getTargetRange2 = slicedToArray(_event$getTargetRange, 1),
            targetRange = _event$getTargetRange2[0];

        if (targetRange) {
          var range = ReactEditor.toSlateRange(editor, targetRange);

          if (!selection || !slate.Range.equals(selection, range)) {
            slate.Transforms.select(editor, range);
          }
        }
      } // COMPAT: If the selection is expanded, even if the command seems like
      // a delete forward/backward command it should delete the selection.


      if (selection && slate.Range.isExpanded(selection) && type.startsWith('delete')) {
        slate.Editor.deleteFragment(editor);
        return;
      }

      switch (type) {
        case 'deleteByComposition':
        case 'deleteByCut':
        case 'deleteByDrag':
          {
            slate.Editor.deleteFragment(editor);
            break;
          }

        case 'deleteContent':
        case 'deleteContentForward':
          {
            slate.Editor.deleteForward(editor);
            break;
          }

        case 'deleteContentBackward':
          {
            slate.Editor.deleteBackward(editor);
            break;
          }

        case 'deleteEntireSoftLine':
          {
            slate.Editor.deleteBackward(editor, {
              unit: 'line'
            });
            slate.Editor.deleteForward(editor, {
              unit: 'line'
            });
            break;
          }

        case 'deleteHardLineBackward':
          {
            slate.Editor.deleteBackward(editor, {
              unit: 'block'
            });
            break;
          }

        case 'deleteSoftLineBackward':
          {
            slate.Editor.deleteBackward(editor, {
              unit: 'line'
            });
            break;
          }

        case 'deleteHardLineForward':
          {
            slate.Editor.deleteForward(editor, {
              unit: 'block'
            });
            break;
          }

        case 'deleteSoftLineForward':
          {
            slate.Editor.deleteForward(editor, {
              unit: 'line'
            });
            break;
          }

        case 'deleteWordBackward':
          {
            slate.Editor.deleteBackward(editor, {
              unit: 'word'
            });
            break;
          }

        case 'deleteWordForward':
          {
            slate.Editor.deleteForward(editor, {
              unit: 'word'
            });
            break;
          }

        case 'insertLineBreak':
        case 'insertParagraph':
          {
            slate.Editor.insertBreak(editor);
            break;
          }

        case 'insertFromComposition':
        case 'insertFromDrop':
        case 'insertFromPaste':
        case 'insertFromYank':
        case 'insertReplacementText':
        case 'insertText':
          {
            if (data instanceof DataTransfer) {
              ReactEditor.insertData(editor, data);
            } else if (typeof data === 'string') {
              slate.Editor.insertText(editor, data);
            }

            break;
          }
      }
    }
  }, [readOnly, propsOnDOMBeforeInput]); // Attach a native DOM event handler for `beforeinput` events, because React's
  // built-in `onBeforeInput` is actually a leaky polyfill that doesn't expose
  // real `beforeinput` events sadly... (2019/11/04)
  // https://github.com/facebook/react/issues/11211

  useIsomorphicLayoutEffect(function () {
    if (ref.current && HAS_BEFORE_INPUT_SUPPORT) {
      // @ts-ignore The `beforeinput` event isn't recognized.
      ref.current.addEventListener('beforeinput', onDOMBeforeInput);
    }

    return function () {
      if (ref.current && HAS_BEFORE_INPUT_SUPPORT) {
        // @ts-ignore The `beforeinput` event isn't recognized.
        ref.current.removeEventListener('beforeinput', onDOMBeforeInput);
      }
    };
  }, [onDOMBeforeInput]); // Listen on the native `selectionchange` event to be able to update any time
  // the selection changes. This is required because React's `onSelect` is leaky
  // and non-standard so it doesn't fire until after a selection has been
  // released. This causes issues in situations where another change happens
  // while a selection is being dragged.

  var onDOMSelectionChange = React.useCallback(throttle__default['default'](function () {
    if (!readOnly && !state.isComposing && !state.isUpdatingSelection) {
      var activeElement = window.document.activeElement;
      var el = ReactEditor.toDOMNode(editor, editor);
      var domSelection = window.getSelection();

      if (activeElement === el) {
        state.latestElement = activeElement;
        IS_FOCUSED.set(editor, true);
      } else {
        IS_FOCUSED["delete"](editor);
      }

      if (!domSelection) {
        return slate.Transforms.deselect(editor);
      }

      var anchorNode = domSelection.anchorNode,
          focusNode = domSelection.focusNode;
      var anchorNodeSelectable = hasEditableTarget(editor, anchorNode) || isTargetInsideVoid(editor, anchorNode);
      var focusNodeSelectable = hasEditableTarget(editor, focusNode) || isTargetInsideVoid(editor, focusNode);

      if (anchorNodeSelectable && focusNodeSelectable) {
        var range = ReactEditor.toSlateRange(editor, domSelection);
        slate.Transforms.select(editor, range);
      } else {
        slate.Transforms.deselect(editor);
      }
    }
  }, 100), [readOnly]); // Attach a native DOM event handler for `selectionchange`, because React's
  // built-in `onSelect` handler doesn't fire for all selection changes. It's a
  // leaky polyfill that only fires on keypresses or clicks. Instead, we want to
  // fire for any change to the selection inside the editor. (2019/11/04)
  // https://github.com/facebook/react/issues/5785

  useIsomorphicLayoutEffect(function () {
    window.document.addEventListener('selectionchange', onDOMSelectionChange);
    return function () {
      window.document.removeEventListener('selectionchange', onDOMSelectionChange);
    };
  }, [onDOMSelectionChange]);
  var decorations = decorate([editor, []]);

  if (placeholder && editor.children.length === 1 && Array.from(slate.Node.texts(editor)).length === 1 && slate.Node.string(editor) === '') {
    var _decorations$push;

    var start = slate.Editor.start(editor, []);
    decorations.push((_decorations$push = {}, defineProperty(_decorations$push, PLACEHOLDER_SYMBOL, true), defineProperty(_decorations$push, "placeholder", placeholder), defineProperty(_decorations$push, "anchor", start), defineProperty(_decorations$push, "focus", start), _decorations$push));
  }

  return React__default['default'].createElement(ReadOnlyContext.Provider, {
    value: readOnly
  }, React__default['default'].createElement(Component // COMPAT: The Grammarly Chrome extension works by changing the DOM
  // out from under `contenteditable` elements, which leads to weird
  // behaviors so we have to disable it like editor. (2017/04/24)
  , Object.assign({
    "data-gramm": false,
    role: readOnly ? undefined : 'textbox'
  }, attributes, {
    // COMPAT: Certain browsers don't support the `beforeinput` event, so we'd
    // have to use hacks to make these replacement-based features work.
    spellCheck: !HAS_BEFORE_INPUT_SUPPORT ? undefined : attributes.spellCheck,
    autoCorrect: !HAS_BEFORE_INPUT_SUPPORT ? undefined : attributes.autoCorrect,
    autoCapitalize: !HAS_BEFORE_INPUT_SUPPORT ? undefined : attributes.autoCapitalize,
    "data-slate-editor": true,
    "data-slate-node": "value",
    contentEditable: readOnly ? undefined : true,
    suppressContentEditableWarning: true,
    ref: ref,
    style: _objectSpread({
      // Prevent the default outline styles.
      outline: 'none',
      // Preserve adjacent whitespace and new lines.
      whiteSpace: 'pre-wrap',
      // Allow words to break if they are too long.
      wordWrap: 'break-word'
    }, style),
    onBeforeInput: React.useCallback(function (event) {
      // COMPAT: Certain browsers don't support the `beforeinput` event, so we
      // fall back to React's leaky polyfill instead just for it. It
      // only works for the `insertText` input type.
      if (!HAS_BEFORE_INPUT_SUPPORT && !readOnly && !isEventHandled(event, attributes.onBeforeInput) && hasEditableTarget(editor, event.target)) {
        event.preventDefault();
        var text = event.data;
        slate.Editor.insertText(editor, text);
      }
    }, [readOnly]),
    onBlur: React.useCallback(function (event) {
      if (readOnly || state.isUpdatingSelection || !hasEditableTarget(editor, event.target) || isEventHandled(event, attributes.onBlur)) {
        return;
      } // COMPAT: If the current `activeElement` is still the previous
      // one, this is due to the window being blurred when the tab
      // itself becomes unfocused, so we want to abort early to allow to
      // editor to stay focused when the tab becomes focused again.


      if (state.latestElement === window.document.activeElement) {
        return;
      }

      var relatedTarget = event.relatedTarget;
      var el = ReactEditor.toDOMNode(editor, editor); // COMPAT: The event should be ignored if the focus is returning
      // to the editor from an embedded editable element (eg. an <input>
      // element inside a void node).

      if (relatedTarget === el) {
        return;
      } // COMPAT: The event should be ignored if the focus is moving from
      // the editor to inside a void node's spacer element.


      if (isDOMElement(relatedTarget) && relatedTarget.hasAttribute('data-slate-spacer')) {
        return;
      } // COMPAT: The event should be ignored if the focus is moving to a
      // non- editable section of an element that isn't a void node (eg.
      // a list item of the check list example).


      if (relatedTarget != null && isDOMNode(relatedTarget) && ReactEditor.hasDOMNode(editor, relatedTarget)) {
        var node = ReactEditor.toSlateNode(editor, relatedTarget);

        if (slate.Element.isElement(node) && !editor.isVoid(node)) {
          return;
        }
      }

      IS_FOCUSED["delete"](editor);
    }, [readOnly, attributes.onBlur]),
    onClick: React.useCallback(function (event) {
      if (!readOnly && hasTarget(editor, event.target) && !isEventHandled(event, attributes.onClick) && isDOMNode(event.target)) {
        var node = ReactEditor.toSlateNode(editor, event.target);
        var path = ReactEditor.findPath(editor, node);

        var _start = slate.Editor.start(editor, path);

        var end = slate.Editor.end(editor, path);
        var startVoid = slate.Editor["void"](editor, {
          at: _start
        });
        var endVoid = slate.Editor["void"](editor, {
          at: end
        });

        if (startVoid && endVoid && slate.Path.equals(startVoid[1], endVoid[1])) {
          var range = slate.Editor.range(editor, _start);
          slate.Transforms.select(editor, range);
        }
      }
    }, [readOnly, attributes.onClick]),
    onCompositionEnd: React.useCallback(function (event) {
      if (hasEditableTarget(editor, event.target) && !isEventHandled(event, attributes.onCompositionEnd)) {
        state.isComposing = false; // COMPAT: In Chrome, `beforeinput` events for compositions
        // aren't correct and never fire the "insertFromComposition"
        // type that we need. So instead, insert whenever a composition
        // ends since it will already have been committed to the DOM.

        if (!IS_SAFARI && !IS_FIREFOX_LEGACY && !IS_IOS && event.data) {
          slate.Editor.insertText(editor, event.data);
        }
      }
    }, [attributes.onCompositionEnd]),
    onCompositionStart: React.useCallback(function (event) {
      if (hasEditableTarget(editor, event.target) && !isEventHandled(event, attributes.onCompositionStart)) {
        state.isComposing = true;
      }
    }, [attributes.onCompositionStart]),
    onCopy: React.useCallback(function (event) {
      if (hasEditableTarget(editor, event.target) && !isEventHandled(event, attributes.onCopy)) {
        event.preventDefault();
        ReactEditor.setFragmentData(editor, event.clipboardData);
      }
    }, [attributes.onCopy]),
    onCut: React.useCallback(function (event) {
      if (!readOnly && hasEditableTarget(editor, event.target) && !isEventHandled(event, attributes.onCut)) {
        event.preventDefault();
        ReactEditor.setFragmentData(editor, event.clipboardData);
        var selection = editor.selection;

        if (selection && slate.Range.isExpanded(selection)) {
          slate.Editor.deleteFragment(editor);
        }
      }
    }, [readOnly, attributes.onCut]),
    onDragOver: React.useCallback(function (event) {
      if (hasTarget(editor, event.target) && !isEventHandled(event, attributes.onDragOver)) {
        // Only when the target is void, call `preventDefault` to signal
        // that drops are allowed. Editable content is droppable by
        // default, and calling `preventDefault` hides the cursor.
        var node = ReactEditor.toSlateNode(editor, event.target);

        if (slate.Editor.isVoid(editor, node)) {
          event.preventDefault();
        }
      }
    }, [attributes.onDragOver]),
    onDragStart: React.useCallback(function (event) {
      if (hasTarget(editor, event.target) && !isEventHandled(event, attributes.onDragStart)) {
        var node = ReactEditor.toSlateNode(editor, event.target);
        var path = ReactEditor.findPath(editor, node);
        var voidMatch = slate.Editor["void"](editor, {
          at: path
        }); // If starting a drag on a void node, make sure it is selected
        // so that it shows up in the selection's fragment.

        if (voidMatch) {
          var range = slate.Editor.range(editor, path);
          slate.Transforms.select(editor, range);
        }

        ReactEditor.setFragmentData(editor, event.dataTransfer);
      }
    }, [attributes.onDragStart]),
    onDrop: React.useCallback(function (event) {
      if (hasTarget(editor, event.target) && !readOnly && !isEventHandled(event, attributes.onDrop)) {
        // COMPAT: Certain browsers don't fire `beforeinput` events at all, and
        // Chromium browsers don't properly fire them for files being
        // dropped into a `contenteditable`. (2019/11/26)
        // https://bugs.chromium.org/p/chromium/issues/detail?id=1028668
        if (!HAS_BEFORE_INPUT_SUPPORT || !IS_SAFARI && event.dataTransfer.files.length > 0) {
          event.preventDefault();
          var range = ReactEditor.findEventRange(editor, event);
          var data = event.dataTransfer;
          slate.Transforms.select(editor, range);
          ReactEditor.insertData(editor, data);
        }
      }
    }, [readOnly, attributes.onDrop]),
    onFocus: React.useCallback(function (event) {
      if (!readOnly && !state.isUpdatingSelection && hasEditableTarget(editor, event.target) && !isEventHandled(event, attributes.onFocus)) {
        var el = ReactEditor.toDOMNode(editor, editor);
        state.latestElement = window.document.activeElement; // COMPAT: If the editor has nested editable elements, the focus
        // can go to them. In Firefox, this must be prevented because it
        // results in issues with keyboard navigation. (2017/03/30)

        if (IS_FIREFOX && event.target !== el) {
          el.focus();
          return;
        }

        IS_FOCUSED.set(editor, true);
      }
    }, [readOnly, attributes.onFocus]),
    onKeyDown: React.useCallback(function (event) {
      if (!readOnly && hasEditableTarget(editor, event.target) && !isEventHandled(event, attributes.onKeyDown)) {
        var nativeEvent = event.nativeEvent;
        var selection = editor.selection; // COMPAT: Since we prevent the default behavior on
        // `beforeinput` events, the browser doesn't think there's ever
        // any history stack to undo or redo, so we have to manage these
        // hotkeys ourselves. (2019/11/06)

        if (Hotkeys.isRedo(nativeEvent)) {
          event.preventDefault();

          if (typeof editor.redo === 'function') {
            editor.redo();
          }

          return;
        }

        if (Hotkeys.isUndo(nativeEvent)) {
          event.preventDefault();

          if (typeof editor.undo