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File: public/js/tinymce/src/core/src/main/js/undo/Fragments.js

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File: public/js/tinymce/src/core/src/main/js/undo/Fragments.js
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Description: Auxiliary data
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/** * Fragments.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 reads and applies html fragments from/to dom nodes. * * @class tinymce.undo.Fragments * @private */ define( 'tinymce.core.undo.Fragments', [ 'global!document', 'tinymce.core.html.Entities', 'tinymce.core.undo.Diff', 'tinymce.core.util.Arr' ], function (document, Entities, Diff, Arr) { var getOuterHtml = function (elm) { if (elm.nodeType === 1) { return elm.outerHTML; } else if (elm.nodeType === 3) { return Entities.encodeRaw(elm.data, false); } else if (elm.nodeType === 8) { return '<!--' + elm.data + '-->'; } return ''; }; var createFragment = function (html) { var frag, node, container; container = document.createElement("div"); frag = document.createDocumentFragment(); if (html) { container.innerHTML = html; } while ((node = container.firstChild)) { frag.appendChild(node); } return frag; }; var insertAt = function (elm, html, index) { var fragment = createFragment(html); if (elm.hasChildNodes() && index < elm.childNodes.length) { var target = elm.childNodes[index]; target.parentNode.insertBefore(fragment, target); } else { elm.appendChild(fragment); } }; var removeAt = function (elm, index) { if (elm.hasChildNodes() && index < elm.childNodes.length) { var target = elm.childNodes[index]; target.parentNode.removeChild(target); } }; var applyDiff = function (diff, elm) { var index = 0; Arr.each(diff, function (action) { if (action[0] === Diff.KEEP) { index++; } else if (action[0] === Diff.INSERT) { insertAt(elm, action[1], index); index++; } else if (action[0] === Diff.DELETE) { removeAt(elm, index); } }); }; var read = function (elm) { return Arr.filter(Arr.map(elm.childNodes, getOuterHtml), function (item) { return item.length > 0; }); }; var write = function (fragments, elm) { var currentFragments = Arr.map(elm.childNodes, getOuterHtml); applyDiff(Diff.diff(currentFragments, fragments), elm); return elm; }; return { read: read, write: write }; } );