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File: public/js/tinymce/src/core/src/main/js/caret/CaretBookmark.js

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File: public/js/tinymce/src/core/src/main/js/caret/CaretBookmark.js
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/** * CaretBookmark.js * * Released under LGPL License. * Copyright (c) 1999-2017 Ephox Corp. All rights reserved * * License: http://www.tinymce.com/license * Contributing: http://www.tinymce.com/contributing */ /** * This module creates or resolves xpath like string representation of a CaretPositions. * * The format is a / separated list of chunks with: * <element|text()>[index|after|before] * * For example: * p[0]/b[0]/text()[0],1 = <p><b>a|c</b></p> * p[0]/img[0],before = <p>|<img></p> * p[0]/img[0],after = <p><img>|</p> * * @private * @static * @class tinymce.caret.CaretBookmark * @example * var bookmark = CaretBookmark.create(rootElm, CaretPosition.before(rootElm.firstChild)); * var caretPosition = CaretBookmark.resolve(bookmark); */ define( 'tinymce.core.caret.CaretBookmark', [ 'tinymce.core.dom.NodeType', 'tinymce.core.dom.DOMUtils', 'tinymce.core.util.Fun', 'tinymce.core.util.Arr', 'tinymce.core.caret.CaretPosition' ], function (NodeType, DomUtils, Fun, Arr, CaretPosition) { var isText = NodeType.isText, isBogus = NodeType.isBogus, nodeIndex = DomUtils.nodeIndex; var normalizedParent = function (node) { var parentNode = node.parentNode; if (isBogus(parentNode)) { return normalizedParent(parentNode); } return parentNode; }; var getChildNodes = function (node) { if (!node) { return []; } return Arr.reduce(node.childNodes, function (result, node) { if (isBogus(node) && node.nodeName != 'BR') { result = result.concat(getChildNodes(node)); } else { result.push(node); } return result; }, []); }; var normalizedTextOffset = function (textNode, offset) { while ((textNode = textNode.previousSibling)) { if (!isText(textNode)) { break; } offset += textNode.data.length; } return offset; }; var equal = function (targetValue) { return function (value) { return targetValue === value; }; }; var normalizedNodeIndex = function (node) { var nodes, index, numTextFragments; nodes = getChildNodes(normalizedParent(node)); index = Arr.findIndex(nodes, equal(node), node); nodes = nodes.slice(0, index + 1); numTextFragments = Arr.reduce(nodes, function (result, node, i) { if (isText(node) && isText(nodes[i - 1])) { result++; } return result; }, 0); nodes = Arr.filter(nodes, NodeType.matchNodeNames(node.nodeName)); index = Arr.findIndex(nodes, equal(node), node); return index - numTextFragments; }; var createPathItem = function (node) { var name; if (isText(node)) { name = 'text()'; } else { name = node.nodeName.toLowerCase(); } return name + '[' + normalizedNodeIndex(node) + ']'; }; var parentsUntil = function (rootNode, node, predicate) { var parents = []; for (node = node.parentNode; node != rootNode; node = node.parentNode) { if (predicate && predicate(node)) { break; } parents.push(node); } return parents; }; var create = function (rootNode, caretPosition) { var container, offset, path = [], outputOffset, childNodes, parents; container = caretPosition.container(); offset = caretPosition.offset(); if (isText(container)) { outputOffset = normalizedTextOffset(container, offset); } else { childNodes = container.childNodes; if (offset >= childNodes.length) { outputOffset = 'after'; offset = childNodes.length - 1; } else { outputOffset = 'before'; } container = childNodes[offset]; } path.push(createPathItem(container)); parents = parentsUntil(rootNode, container); parents = Arr.filter(parents, Fun.negate(NodeType.isBogus)); path = path.concat(Arr.map(parents, function (node) { return createPathItem(node); })); return path.reverse().join('/') + ',' + outputOffset; }; var resolvePathItem = function (node, name, index) { var nodes = getChildNodes(node); nodes = Arr.filter(nodes, function (node, index) { return !isText(node) || !isText(nodes[index - 1]); }); nodes = Arr.filter(nodes, NodeType.matchNodeNames(name)); return nodes[index]; }; var findTextPosition = function (container, offset) { var node = container, targetOffset = 0, dataLen; while (isText(node)) { dataLen = node.data.length; if (offset >= targetOffset && offset <= targetOffset + dataLen) { container = node; offset = offset - targetOffset; break; } if (!isText(node.nextSibling)) { container = node; offset = dataLen; break; } targetOffset += dataLen; node = node.nextSibling; } if (offset > container.data.length) { offset = container.data.length; } return new CaretPosition(container, offset); }; var resolve = function (rootNode, path) { var parts, container, offset; if (!path) { return null; } parts = path.split(','); path = parts[0].split('/'); offset = parts.length > 1 ? parts[1] : 'before'; container = Arr.reduce(path, function (result, value) { value = /([\w\-\(\)]+)\[([0-9]+)\]/.exec(value); if (!value) { return null; } if (value[1] === 'text()') { value[1] = '#text'; } return resolvePathItem(result, value[1], parseInt(value[2], 10)); }, rootNode); if (!container) { return null; } if (!isText(container)) { if (offset === 'after') { offset = nodeIndex(container) + 1; } else { offset = nodeIndex(container); } return new CaretPosition(container.parentNode, offset); } return findTextPosition(container, parseInt(offset, 10)); }; return { /** * Create a xpath bookmark location for the specified caret position. * * @method create * @param {Node} rootNode Root node to create bookmark within. * @param {tinymce.caret.CaretPosition} caretPosition Caret position within the root node. * @return {String} String xpath like location of caret position. */ create: create, /** * Resolves a xpath like bookmark location to the a caret position. * * @method resolve * @param {Node} rootNode Root node to resolve xpath bookmark within. * @param {String} bookmark Bookmark string to resolve. * @return {tinymce.caret.CaretPosition} Caret position resolved from xpath like bookmark. */ resolve: resolve }; } );