d2-ui
Version:
32 lines (28 loc) • 816 B
JavaScript
/**
* Copyright (c) 2013-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*
* @providesModule findAncestorOffsetKey
* @typechecks
*
*/
;
var getSelectionOffsetKeyForNode = require('./getSelectionOffsetKeyForNode');
/**
* Get the key from the node's nearest offset-aware ancestor.
*/
function findAncestorOffsetKey(node) {
while (node && node !== document.documentElement) {
var key = getSelectionOffsetKeyForNode(node);
if (key != null) {
return key;
}
node = node.parentNode;
}
return null;
}
module.exports = findAncestorOffsetKey;