packages/dom/src/scope.js

/**
 * @license
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

export function ownerDocument(scope) {
  if ('commonAncestorContainer' in scope) {
    return scope.commonAncestorContainer.ownerDocument;
  }

  return scope.ownerDocument;
}

export function rangeFromScope(scope) {
  if ('commonAncestorContainer' in scope) {
    return scope;
  }

  const document = scope.ownerDocument;
  const range = document.createRange();

  range.selectNodeContents(scope);

  return range;
}