From de98e0b232509d5f40c135d540a70e415272ff85 Mon Sep 17 00:00:00 2001 From: Florian Dold Date: Wed, 3 May 2017 15:35:00 +0200 Subject: node_modules --- .../react-dom/lib/getNodeForCharacterOffset.js | 73 ++++++++++++++++++++++ 1 file changed, 73 insertions(+) create mode 100644 node_modules/react-dom/lib/getNodeForCharacterOffset.js (limited to 'node_modules/react-dom/lib/getNodeForCharacterOffset.js') diff --git a/node_modules/react-dom/lib/getNodeForCharacterOffset.js b/node_modules/react-dom/lib/getNodeForCharacterOffset.js new file mode 100644 index 000000000..34ca33756 --- /dev/null +++ b/node_modules/react-dom/lib/getNodeForCharacterOffset.js @@ -0,0 +1,73 @@ +/** + * Copyright 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. + * + */ + +'use strict'; + +/** + * Given any node return the first leaf node without children. + * + * @param {DOMElement|DOMTextNode} node + * @return {DOMElement|DOMTextNode} + */ + +function getLeafNode(node) { + while (node && node.firstChild) { + node = node.firstChild; + } + return node; +} + +/** + * Get the next sibling within a container. This will walk up the + * DOM if a node's siblings have been exhausted. + * + * @param {DOMElement|DOMTextNode} node + * @return {?DOMElement|DOMTextNode} + */ +function getSiblingNode(node) { + while (node) { + if (node.nextSibling) { + return node.nextSibling; + } + node = node.parentNode; + } +} + +/** + * Get object describing the nodes which contain characters at offset. + * + * @param {DOMElement|DOMTextNode} root + * @param {number} offset + * @return {?object} + */ +function getNodeForCharacterOffset(root, offset) { + var node = getLeafNode(root); + var nodeStart = 0; + var nodeEnd = 0; + + while (node) { + if (node.nodeType === 3) { + nodeEnd = nodeStart + node.textContent.length; + + if (nodeStart <= offset && nodeEnd >= offset) { + return { + node: node, + offset: offset - nodeStart + }; + } + + nodeStart = nodeEnd; + } + + node = getLeafNode(getSiblingNode(node)); + } +} + +module.exports = getNodeForCharacterOffset; \ No newline at end of file -- cgit v1.2.3