| /** |
| * @license |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| import { ownerDocument } from "./owner-document"; |
| |
| /** |
| * Returns a range that exactly selects the contents of the given node. |
| * |
| * This function is idempotent: If the given argument is already a range, it |
| * simply returns that range. |
| * |
| * @param nodeOrRange The node/range to convert to a range if it is not already |
| * a range. |
| */ |
| export function toRange(nodeOrRange: Node | Range): Range { |
| if (isRange(nodeOrRange)) { |
| return nodeOrRange; |
| } else { |
| const node = nodeOrRange; |
| const range = ownerDocument(node).createRange(); |
| range.selectNodeContents(node); |
| return range; |
| } |
| } |
| |
| function isRange(nodeOrRange: Node | Range): nodeOrRange is Range { |
| return ('startContainer' in nodeOrRange); |
| } |