@atlaskit/editor-plugin-selection/dist/esm/pm-plugins/events/create-selection-between.js

Selection plugin for @atlaskit/editor-core

import { NodeSelection, TextSelection } from '@atlaskit/editor-prosemirror/state';
var DOC_START_POS = 0;
function isNodeContentEmpty(maybeNode) {
  return (maybeNode === null || maybeNode === void 0 ? void 0 : maybeNode.content.size) === 0 || (maybeNode === null || maybeNode === void 0 ? void 0 : maybeNode.textContent) === '';
}
function findEmptySelectableParentNodePosition($pos) {
  var doc = $pos.doc;
  if ($pos.pos > doc.content.size) {
    return null;
  }
  if (isCurrentNodeAtomOrEmptySelectable($pos)) {
    return $pos;
  }
  if ($pos.nodeBefore !== null) {
    return null;
  }
  if ($pos.depth === 0 && $pos.pos === 0) {
    return $pos;
  }
  var positionLevelUp = $pos.before();
  var resolvedPositionLevelUp = doc.resolve(positionLevelUp);
  return findEmptySelectableParentNodePosition(resolvedPositionLevelUp);
}
var isCurrentNodeAtomOrEmptySelectable = function isCurrentNodeAtomOrEmptySelectable($pos) {
  //ED-20209: Using $resolvedJustBeforeNodePos so that $resolvedJustBeforeNodePos.nodeAfter return the node at $pos.pos even if that is an atomic node
  if ($pos.pos === DOC_START_POS) {
    return false;
  }
  var justBeforeNodePos = $pos.pos - 1;
  var $resolvedjustBeforePos = $pos.doc.resolve(justBeforeNodePos);
  var maybeNode = $resolvedjustBeforePos.nodeAfter;
  if (!maybeNode || !maybeNode.isBlock) {
    return false;
  }
  if (maybeNode.isAtom) {
    return true;
  }
  return isNodeContentEmpty(maybeNode) && NodeSelection.isSelectable(maybeNode);
};
function findNextSelectionPosition(_ref) {
  var $targetHead = _ref.$targetHead,
    $anchor = _ref.$anchor,
    doc = _ref.doc;
  var direction = $anchor.pos < $targetHead.pos ? 'down' : 'up';

  //ED-20209: If the targetHead position is just before some node, Then return $targetHead and not select any node.
  var maybeNode = null;

  // prosemirror calls 'createSelectionBetween' for native 'drop' events, it passes $anchor
  // and $head which are based on a transformed document, but only provides the original
  // doc. Need to remap the $head pos to last element in doc to avoid RangeErrors.
  if ($targetHead.pos >= doc.nodeSize) {
    maybeNode = doc.resolve(doc.nodeSize - 2).nodeBefore;
  } else if ($targetHead.pos !== DOC_START_POS) {
    var justBeforeHeadPos = $targetHead.pos - 1;
    var $resolvedJustBeforeHeadPos = doc.resolve(justBeforeHeadPos);
    maybeNode = $resolvedJustBeforeHeadPos.nodeAfter;
  }
  if (maybeNode === null) {
    maybeNode = $targetHead.nodeAfter;
    if (maybeNode !== null) {
      $targetHead = doc.resolve($targetHead.pos + 1);
    } else {
      return null;
    }
  }
  var maybeNextPosition = findEmptySelectableParentNodePosition($targetHead);
  if (maybeNextPosition) {
    var justBeforeMaybeNextPos = maybeNextPosition.pos - 1;
    if (direction === 'up') {
      return doc.resolve(Math.max(justBeforeMaybeNextPos, 0));
    } else {
      var maybeNextNode = doc.resolve(justBeforeMaybeNextPos).nodeAfter;
      if (maybeNextNode) {
        return doc.resolve(Math.min(justBeforeMaybeNextPos + maybeNextNode.nodeSize, doc.content.size));
      }
    }
  }
  return null;
}
export var onCreateSelectionBetween = function onCreateSelectionBetween(view, $anchor, $head) {
  var _$head$parent, _$head$parent2;
  if ($anchor.pos === $head.pos) {
    return null;
  }
  if ($anchor.depth === $head.depth && $anchor.sameParent($head)) {
    return null;
  }

  // If the head is targeting a paragraph on root, then let ProseMirror handle the text selection
  if ($head.depth === 1 && ((_$head$parent = $head.parent) === null || _$head$parent === void 0 ? void 0 : _$head$parent.type.name) === 'paragraph') {
    return null;
  }

  // If head is at the beginning of a non-empty textblock, let ProseMirror handle the text selection
  if ((_$head$parent2 = $head.parent) !== null && _$head$parent2 !== void 0 && _$head$parent2.isTextblock && !isNodeContentEmpty($head.parent) && $head.parentOffset === 0) {
    return null;
  }
  var $nextHeadPosition = findNextSelectionPosition({
    $targetHead: $head,
    $anchor: $anchor,
    doc: view.state.doc
  });
  if (!$nextHeadPosition) {
    return null;
  }
  var forcedTextSelection = TextSelection.create(view.state.doc, $anchor.pos, $nextHeadPosition.pos);
  return forcedTextSelection;
};