vue-files-preview-inno/es/node_modules/epubjs/src/utils/core.mjs.map

A tool for previewing files such as doc, excel, pdf, image, markdown, txt, audio, and video and so on.

{"version":3,"file":"core.mjs","sources":["../../../../../../node_modules/epubjs/src/utils/core.js"],"sourcesContent":["/**\n * Core Utilities and Helpers\n * @module Core\n*/\nimport { DOMParser as XMLDOMParser } from \"@xmldom/xmldom\";\n\n/**\n * Vendor prefixed requestAnimationFrame\n * @returns {function} requestAnimationFrame\n * @memberof Core\n */\nexport const requestAnimationFrame = (typeof window != \"undefined\") ? (window.requestAnimationFrame || window.mozRequestAnimationFrame || window.webkitRequestAnimationFrame || window.msRequestAnimationFrame) : false;\nconst ELEMENT_NODE = 1;\nconst TEXT_NODE = 3;\nconst COMMENT_NODE = 8;\nconst DOCUMENT_NODE = 9;\nconst _URL = typeof URL != \"undefined\" ? URL : (typeof window != \"undefined\" ? (window.URL || window.webkitURL || window.mozURL) : undefined);\n\n/**\n * Generates a UUID\n * based on: http://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid-in-javascript\n * @returns {string} uuid\n * @memberof Core\n */\nexport function uuid() {\n\tvar d = new Date().getTime();\n\tvar uuid = \"xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx\".replace(/[xy]/g, function(c) {\n\t\tvar r = (d + Math.random()*16)%16 | 0;\n\t\td = Math.floor(d/16);\n\t\treturn (c==\"x\" ? r : (r&0x7|0x8)).toString(16);\n\t});\n\treturn uuid;\n}\n\n/**\n * Gets the height of a document\n * @returns {number} height\n * @memberof Core\n */\nexport function documentHeight() {\n\treturn Math.max(\n\t\t\tdocument.documentElement.clientHeight,\n\t\t\tdocument.body.scrollHeight,\n\t\t\tdocument.documentElement.scrollHeight,\n\t\t\tdocument.body.offsetHeight,\n\t\t\tdocument.documentElement.offsetHeight\n\t);\n}\n\n/**\n * Checks if a node is an element\n * @param {object} obj\n * @returns {boolean}\n * @memberof Core\n */\nexport function isElement(obj) {\n\treturn !!(obj && obj.nodeType == 1);\n}\n\n/**\n * @param {any} n\n * @returns {boolean}\n * @memberof Core\n */\nexport function isNumber(n) {\n\treturn !isNaN(parseFloat(n)) && isFinite(n);\n}\n\n/**\n * @param {any} n\n * @returns {boolean}\n * @memberof Core\n */\nexport function isFloat(n) {\n\tlet f = parseFloat(n);\n\n\tif (isNumber(n) === false) {\n\t\treturn false;\n\t}\n\n\tif (typeof n === \"string\" && n.indexOf(\".\") > -1) {\n\t\treturn true;\n\t}\n\n\treturn Math.floor(f) !== f;\n}\n\n/**\n * Get a prefixed css property\n * @param {string} unprefixed\n * @returns {string}\n * @memberof Core\n */\nexport function prefixed(unprefixed) {\n\tvar vendors = [\"Webkit\", \"webkit\", \"Moz\", \"O\", \"ms\" ];\n\tvar prefixes = [\"-webkit-\", \"-webkit-\", \"-moz-\", \"-o-\", \"-ms-\"];\n\tvar lower = unprefixed.toLowerCase();\n\tvar length = vendors.length;\n\n\tif (typeof(document) === \"undefined\" || typeof(document.body.style[lower]) != \"undefined\") {\n\t\treturn unprefixed;\n\t}\n\n\tfor (var i = 0; i < length; i++) {\n\t\tif (typeof(document.body.style[prefixes[i] + lower]) != \"undefined\") {\n\t\t\treturn prefixes[i] + lower;\n\t\t}\n\t}\n\n\treturn unprefixed;\n}\n\n/**\n * Apply defaults to an object\n * @param {object} obj\n * @returns {object}\n * @memberof Core\n */\nexport function defaults(obj) {\n\tfor (var i = 1, length = arguments.length; i < length; i++) {\n\t\tvar source = arguments[i];\n\t\tfor (var prop in source) {\n\t\t\tif (obj[prop] === void 0) obj[prop] = source[prop];\n\t\t}\n\t}\n\treturn obj;\n}\n\n/**\n * Extend properties of an object\n * @param {object} target\n * @returns {object}\n * @memberof Core\n */\nexport function extend(target) {\n\tvar sources = [].slice.call(arguments, 1);\n\tsources.forEach(function (source) {\n\t\tif(!source) return;\n\t\tObject.getOwnPropertyNames(source).forEach(function(propName) {\n\t\t\tObject.defineProperty(target, propName, Object.getOwnPropertyDescriptor(source, propName));\n\t\t});\n\t});\n\treturn target;\n}\n\n/**\n * Fast quicksort insert for sorted array -- based on:\n *  http://stackoverflow.com/questions/1344500/efficient-way-to-insert-a-number-into-a-sorted-array-of-numbers\n * @param {any} item\n * @param {array} array\n * @param {function} [compareFunction]\n * @returns {number} location (in array)\n * @memberof Core\n */\nexport function insert(item, array, compareFunction) {\n\tvar location = locationOf(item, array, compareFunction);\n\tarray.splice(location, 0, item);\n\n\treturn location;\n}\n\n/**\n * Finds where something would fit into a sorted array\n * @param {any} item\n * @param {array} array\n * @param {function} [compareFunction]\n * @param {function} [_start]\n * @param {function} [_end]\n * @returns {number} location (in array)\n * @memberof Core\n */\nexport function locationOf(item, array, compareFunction, _start, _end) {\n\tvar start = _start || 0;\n\tvar end = _end || array.length;\n\tvar pivot = parseInt(start + (end - start) / 2);\n\tvar compared;\n\tif(!compareFunction){\n\t\tcompareFunction = function(a, b) {\n\t\t\tif(a > b) return 1;\n\t\t\tif(a < b) return -1;\n\t\t\tif(a == b) return 0;\n\t\t};\n\t}\n\tif(end-start <= 0) {\n\t\treturn pivot;\n\t}\n\n\tcompared = compareFunction(array[pivot], item);\n\tif(end-start === 1) {\n\t\treturn compared >= 0 ? pivot : pivot + 1;\n\t}\n\tif(compared === 0) {\n\t\treturn pivot;\n\t}\n\tif(compared === -1) {\n\t\treturn locationOf(item, array, compareFunction, pivot, end);\n\t} else{\n\t\treturn locationOf(item, array, compareFunction, start, pivot);\n\t}\n}\n\n/**\n * Finds index of something in a sorted array\n * Returns -1 if not found\n * @param {any} item\n * @param {array} array\n * @param {function} [compareFunction]\n * @param {function} [_start]\n * @param {function} [_end]\n * @returns {number} index (in array) or -1\n * @memberof Core\n */\nexport function indexOfSorted(item, array, compareFunction, _start, _end) {\n\tvar start = _start || 0;\n\tvar end = _end || array.length;\n\tvar pivot = parseInt(start + (end - start) / 2);\n\tvar compared;\n\tif(!compareFunction){\n\t\tcompareFunction = function(a, b) {\n\t\t\tif(a > b) return 1;\n\t\t\tif(a < b) return -1;\n\t\t\tif(a == b) return 0;\n\t\t};\n\t}\n\tif(end-start <= 0) {\n\t\treturn -1; // Not found\n\t}\n\n\tcompared = compareFunction(array[pivot], item);\n\tif(end-start === 1) {\n\t\treturn compared === 0 ? pivot : -1;\n\t}\n\tif(compared === 0) {\n\t\treturn pivot; // Found\n\t}\n\tif(compared === -1) {\n\t\treturn indexOfSorted(item, array, compareFunction, pivot, end);\n\t} else{\n\t\treturn indexOfSorted(item, array, compareFunction, start, pivot);\n\t}\n}\n/**\n * Find the bounds of an element\n * taking padding and margin into account\n * @param {element} el\n * @returns {{ width: Number, height: Number}}\n * @memberof Core\n */\nexport function bounds(el) {\n\n\tvar style = window.getComputedStyle(el);\n\tvar widthProps = [\"width\", \"paddingRight\", \"paddingLeft\", \"marginRight\", \"marginLeft\", \"borderRightWidth\", \"borderLeftWidth\"];\n\tvar heightProps = [\"height\", \"paddingTop\", \"paddingBottom\", \"marginTop\", \"marginBottom\", \"borderTopWidth\", \"borderBottomWidth\"];\n\n\tvar width = 0;\n\tvar height = 0;\n\n\twidthProps.forEach(function(prop){\n\t\twidth += parseFloat(style[prop]) || 0;\n\t});\n\n\theightProps.forEach(function(prop){\n\t\theight += parseFloat(style[prop]) || 0;\n\t});\n\n\treturn {\n\t\theight: height,\n\t\twidth: width\n\t};\n\n}\n\n/**\n * Find the bounds of an element\n * taking padding, margin and borders into account\n * @param {element} el\n * @returns {{ width: Number, height: Number}}\n * @memberof Core\n */\nexport function borders(el) {\n\n\tvar style = window.getComputedStyle(el);\n\tvar widthProps = [\"paddingRight\", \"paddingLeft\", \"marginRight\", \"marginLeft\", \"borderRightWidth\", \"borderLeftWidth\"];\n\tvar heightProps = [\"paddingTop\", \"paddingBottom\", \"marginTop\", \"marginBottom\", \"borderTopWidth\", \"borderBottomWidth\"];\n\n\tvar width = 0;\n\tvar height = 0;\n\n\twidthProps.forEach(function(prop){\n\t\twidth += parseFloat(style[prop]) || 0;\n\t});\n\n\theightProps.forEach(function(prop){\n\t\theight += parseFloat(style[prop]) || 0;\n\t});\n\n\treturn {\n\t\theight: height,\n\t\twidth: width\n\t};\n\n}\n\n/**\n * Find the bounds of any node\n * allows for getting bounds of text nodes by wrapping them in a range\n * @param {node} node\n * @returns {BoundingClientRect}\n * @memberof Core\n */\nexport function nodeBounds(node) {\n\tlet elPos;\n\tlet doc = node.ownerDocument;\n\tif(node.nodeType == Node.TEXT_NODE){\n\t\tlet elRange = doc.createRange();\n\t\telRange.selectNodeContents(node);\n\t\telPos = elRange.getBoundingClientRect();\n\t} else {\n\t\telPos = node.getBoundingClientRect();\n\t}\n\treturn elPos;\n}\n\n/**\n * Find the equivalent of getBoundingClientRect of a browser window\n * @returns {{ width: Number, height: Number, top: Number, left: Number, right: Number, bottom: Number }}\n * @memberof Core\n */\nexport function windowBounds() {\n\n\tvar width = window.innerWidth;\n\tvar height = window.innerHeight;\n\n\treturn {\n\t\ttop: 0,\n\t\tleft: 0,\n\t\tright: width,\n\t\tbottom: height,\n\t\twidth: width,\n\t\theight: height\n\t};\n\n}\n\n/**\n * Gets the index of a node in its parent\n * @param {Node} node\n * @param {string} typeId\n * @return {number} index\n * @memberof Core\n */\nexport function indexOfNode(node, typeId) {\n\tvar parent = node.parentNode;\n\tvar children = parent.childNodes;\n\tvar sib;\n\tvar index = -1;\n\tfor (var i = 0; i < children.length; i++) {\n\t\tsib = children[i];\n\t\tif (sib.nodeType === typeId) {\n\t\t\tindex++;\n\t\t}\n\t\tif (sib == node) break;\n\t}\n\n\treturn index;\n}\n\n/**\n * Gets the index of a text node in its parent\n * @param {node} textNode\n * @returns {number} index\n * @memberof Core\n */\nexport function indexOfTextNode(textNode) {\n\treturn indexOfNode(textNode, TEXT_NODE);\n}\n\n/**\n * Gets the index of an element node in its parent\n * @param {element} elementNode\n * @returns {number} index\n * @memberof Core\n */\nexport function indexOfElementNode(elementNode) {\n\treturn indexOfNode(elementNode, ELEMENT_NODE);\n}\n\n/**\n * Check if extension is xml\n * @param {string} ext\n * @returns {boolean}\n * @memberof Core\n */\nexport function isXml(ext) {\n\treturn [\"xml\", \"opf\", \"ncx\"].indexOf(ext) > -1;\n}\n\n/**\n * Create a new blob\n * @param {any} content\n * @param {string} mime\n * @returns {Blob}\n * @memberof Core\n */\nexport function createBlob(content, mime){\n\treturn new Blob([content], {type : mime });\n}\n\n/**\n * Create a new blob url\n * @param {any} content\n * @param {string} mime\n * @returns {string} url\n * @memberof Core\n */\nexport function createBlobUrl(content, mime){\n\tvar tempUrl;\n\tvar blob = createBlob(content, mime);\n\n\ttempUrl = _URL.createObjectURL(blob);\n\n\treturn tempUrl;\n}\n\n/**\n * Remove a blob url\n * @param {string} url\n * @memberof Core\n */\nexport function revokeBlobUrl(url){\n\treturn _URL.revokeObjectURL(url);\n}\n\n/**\n * Create a new base64 encoded url\n * @param {any} content\n * @param {string} mime\n * @returns {string} url\n * @memberof Core\n */\nexport function createBase64Url(content, mime){\n\tvar data;\n\tvar datauri;\n\n\tif (typeof(content) !== \"string\") {\n\t\t// Only handles strings\n\t\treturn;\n\t}\n\n\tdata = btoa(content);\n\n\tdatauri = \"data:\" + mime + \";base64,\" + data;\n\n\treturn datauri;\n}\n\n/**\n * Get type of an object\n * @param {object} obj\n * @returns {string} type\n * @memberof Core\n */\nexport function type(obj){\n\treturn Object.prototype.toString.call(obj).slice(8, -1);\n}\n\n/**\n * Parse xml (or html) markup\n * @param {string} markup\n * @param {string} mime\n * @param {boolean} forceXMLDom force using xmlDom to parse instead of native parser\n * @returns {document} document\n * @memberof Core\n */\nexport function parse(markup, mime, forceXMLDom) {\n\tvar doc;\n\tvar Parser;\n\n\tif (typeof DOMParser === \"undefined\" || forceXMLDom) {\n\t\tParser = XMLDOMParser;\n\t} else {\n\t\tParser = DOMParser;\n\t}\n\n\t// Remove byte order mark before parsing\n\t// https://www.w3.org/International/questions/qa-byte-order-mark\n\tif(markup.charCodeAt(0) === 0xFEFF) {\n\t\tmarkup = markup.slice(1);\n\t}\n\n\tdoc = new Parser().parseFromString(markup, mime);\n\n\treturn doc;\n}\n\n/**\n * querySelector polyfill\n * @param {element} el\n * @param {string} sel selector string\n * @returns {element} element\n * @memberof Core\n */\nexport function qs(el, sel) {\n\tvar elements;\n\tif (!el) {\n\t\tthrow new Error(\"No Element Provided\");\n\t}\n\n\tif (typeof el.querySelector != \"undefined\") {\n\t\treturn el.querySelector(sel);\n\t} else {\n\t\telements = el.getElementsByTagName(sel);\n\t\tif (elements.length) {\n\t\t\treturn elements[0];\n\t\t}\n\t}\n}\n\n/**\n * querySelectorAll polyfill\n * @param {element} el\n * @param {string} sel selector string\n * @returns {element[]} elements\n * @memberof Core\n */\nexport function qsa(el, sel) {\n\n\tif (typeof el.querySelector != \"undefined\") {\n\t\treturn el.querySelectorAll(sel);\n\t} else {\n\t\treturn el.getElementsByTagName(sel);\n\t}\n}\n\n/**\n * querySelector by property\n * @param {element} el\n * @param {string} sel selector string\n * @param {object[]} props\n * @returns {element[]} elements\n * @memberof Core\n */\nexport function qsp(el, sel, props) {\n\tvar q, filtered;\n\tif (typeof el.querySelector != \"undefined\") {\n\t\tsel += \"[\";\n\t\tfor (var prop in props) {\n\t\t\tsel += prop + \"~='\" + props[prop] + \"'\";\n\t\t}\n\t\tsel += \"]\";\n\t\treturn el.querySelector(sel);\n\t} else {\n\t\tq = el.getElementsByTagName(sel);\n\t\tfiltered = Array.prototype.slice.call(q, 0).filter(function(el) {\n\t\t\tfor (var prop in props) {\n\t\t\t\tif(el.getAttribute(prop) === props[prop]){\n\t\t\t\t\treturn true;\n\t\t\t\t}\n\t\t\t}\n\t\t\treturn false;\n\t\t});\n\n\t\tif (filtered) {\n\t\t\treturn filtered[0];\n\t\t}\n\t}\n}\n\n/**\n * Sprint through all text nodes in a document\n * @memberof Core\n * @param  {element} root element to start with\n * @param  {function} func function to run on each element\n */\nexport function sprint(root, func) {\n\tvar doc = root.ownerDocument || root;\n\tif (typeof(doc.createTreeWalker) !== \"undefined\") {\n\t\ttreeWalker(root, func, NodeFilter.SHOW_TEXT);\n\t} else {\n\t\twalk(root, function(node) {\n\t\t\tif (node && node.nodeType === 3) { // Node.TEXT_NODE\n\t\t\t\tfunc(node);\n\t\t\t}\n\t\t}, true);\n\t}\n}\n\n/**\n * Create a treeWalker\n * @memberof Core\n * @param  {element} root element to start with\n * @param  {function} func function to run on each element\n * @param  {function | object} filter function or object to filter with\n */\nexport function treeWalker(root, func, filter) {\n\tvar treeWalker = document.createTreeWalker(root, filter, null, false);\n\tlet node;\n\twhile ((node = treeWalker.nextNode())) {\n\t\tfunc(node);\n\t}\n}\n\n/**\n * @memberof Core\n * @param {node} node\n * @param {callback} return false for continue,true for break inside callback\n */\nexport function walk(node,callback){\n\tif(callback(node)){\n\t\treturn true;\n\t}\n\tnode = node.firstChild;\n\tif(node){\n\t\tdo{\n\t\t\tlet walked = walk(node,callback);\n\t\t\tif(walked){\n\t\t\t\treturn true;\n\t\t\t}\n\t\t\tnode = node.nextSibling;\n\t\t} while(node);\n\t}\n}\n\n/**\n * Convert a blob to a base64 encoded string\n * @param {Blog} blob\n * @returns {string}\n * @memberof Core\n */\nexport function blob2base64(blob) {\n\treturn new Promise(function(resolve, reject) {\n\t\tvar reader = new FileReader();\n\t\treader.readAsDataURL(blob);\n\t\treader.onloadend = function() {\n\t\t\tresolve(reader.result);\n\t\t};\n\t});\n}\n\n\n/**\n * Creates a new pending promise and provides methods to resolve or reject it.\n * From: https://developer.mozilla.org/en-US/docs/Mozilla/JavaScript_code_modules/Promise.jsm/Deferred#backwards_forwards_compatible\n * @memberof Core\n */\nexport function defer() {\n\t/* A method to resolve the associated Promise with the value passed.\n\t * If the promise is already settled it does nothing.\n\t *\n\t * @param {anything} value : This value is used to resolve the promise\n\t * If the value is a Promise then the associated promise assumes the state\n\t * of Promise passed as value.\n\t */\n\tthis.resolve = null;\n\n\t/* A method to reject the associated Promise with the value passed.\n\t * If the promise is already settled it does nothing.\n\t *\n\t * @param {anything} reason: The reason for the rejection of the Promise.\n\t * Generally its an Error object. If however a Promise is passed, then the Promise\n\t * itself will be the reason for rejection no matter the state of the Promise.\n\t */\n\tthis.reject = null;\n\n\tthis.id = uuid();\n\n\t/* A newly created Pomise object.\n\t * Initially in pending state.\n\t */\n\tthis.promise = new Promise((resolve, reject) => {\n\t\tthis.resolve = resolve;\n\t\tthis.reject = reject;\n\t});\n\tObject.freeze(this);\n}\n\n/**\n * querySelector with filter by epub type\n * @param {element} html\n * @param {string} element element type to find\n * @param {string} type epub type to find\n * @returns {element[]} elements\n * @memberof Core\n */\nexport function querySelectorByType(html, element, type){\n\tvar query;\n\tif (typeof html.querySelector != \"undefined\") {\n\t\tquery = html.querySelector(`${element}[*|type=\"${type}\"]`);\n\t}\n\t// Handle IE not supporting namespaced epub:type in querySelector\n\tif(!query || query.length === 0) {\n\t\tquery = qsa(html, element);\n\t\tfor (var i = 0; i < query.length; i++) {\n\t\t\tif(query[i].getAttributeNS(\"http://www.idpf.org/2007/ops\", \"type\") === type ||\n\t\t\t\t query[i].getAttribute(\"epub:type\") === type) {\n\t\t\t\treturn query[i];\n\t\t\t}\n\t\t}\n\t} else {\n\t\treturn query;\n\t}\n}\n\n/**\n * Find direct descendents of an element\n * @param {element} el\n * @returns {element[]} children\n * @memberof Core\n */\nexport function findChildren(el) {\n\tvar result = [];\n\tvar childNodes = el.childNodes;\n\tfor (var i = 0; i < childNodes.length; i++) {\n\t\tlet node = childNodes[i];\n\t\tif (node.nodeType === 1) {\n\t\t\tresult.push(node);\n\t\t}\n\t}\n\treturn result;\n}\n\n/**\n * Find all parents (ancestors) of an element\n * @param {element} node\n * @returns {element[]} parents\n * @memberof Core\n */\nexport function parents(node) {\n\tvar nodes = [node];\n\tfor (; node; node = node.parentNode) {\n\t\tnodes.unshift(node);\n\t}\n\treturn nodes\n}\n\n/**\n * Find all direct descendents of a specific type\n * @param {element} el\n * @param {string} nodeName\n * @param {boolean} [single]\n * @returns {element[]} children\n * @memberof Core\n */\nexport function filterChildren(el, nodeName, single) {\n\tvar result = [];\n\tvar childNodes = el.childNodes;\n\tfor (var i = 0; i < childNodes.length; i++) {\n\t\tlet node = childNodes[i];\n\t\tif (node.nodeType === 1 && node.nodeName.toLowerCase() === nodeName) {\n\t\t\tif (single) {\n\t\t\t\treturn node;\n\t\t\t} else {\n\t\t\t\tresult.push(node);\n\t\t\t}\n\t\t}\n\t}\n\tif (!single) {\n\t\treturn result;\n\t}\n}\n\n/**\n * Filter all parents (ancestors) with tag name\n * @param {element} node\n * @param {string} tagname\n * @returns {element[]} parents\n * @memberof Core\n */\nexport function getParentByTagName(node, tagname) {\n\tlet parent;\n\tif (node === null || tagname === '') return;\n\tparent = node.parentNode;\n\twhile (parent.nodeType === 1) {\n\t\tif (parent.tagName.toLowerCase() === tagname) {\n\t\t\treturn parent;\n\t\t}\n\t\tparent = parent.parentNode;\n\t}\n}\n\n/**\n * Lightweight Polyfill for DOM Range\n * @class\n * @memberof Core\n */\nexport class RangeObject {\n\tconstructor() {\n\t\tthis.collapsed = false;\n\t\tthis.commonAncestorContainer = undefined;\n\t\tthis.endContainer = undefined;\n\t\tthis.endOffset = undefined;\n\t\tthis.startContainer = undefined;\n\t\tthis.startOffset = undefined;\n\t}\n\n\tsetStart(startNode, startOffset) {\n\t\tthis.startContainer = startNode;\n\t\tthis.startOffset = startOffset;\n\n\t\tif (!this.endContainer) {\n\t\t\tthis.collapse(true);\n\t\t} else {\n\t\t\tthis.commonAncestorContainer = this._commonAncestorContainer();\n\t\t}\n\n\t\tthis._checkCollapsed();\n\t}\n\n\tsetEnd(endNode, endOffset) {\n\t\tthis.endContainer = endNode;\n\t\tthis.endOffset = endOffset;\n\n\t\tif (!this.startContainer) {\n\t\t\tthis.collapse(false);\n\t\t} else {\n\t\t\tthis.collapsed = false;\n\t\t\tthis.commonAncestorContainer = this._commonAncestorContainer();\n\t\t}\n\n\t\tthis._checkCollapsed();\n\t}\n\n\tcollapse(toStart) {\n\t\tthis.collapsed = true;\n\t\tif (toStart) {\n\t\t\tthis.endContainer = this.startContainer;\n\t\t\tthis.endOffset = this.startOffset;\n\t\t\tthis.commonAncestorContainer = this.startContainer.parentNode;\n\t\t} else {\n\t\t\tthis.startContainer = this.endContainer;\n\t\t\tthis.startOffset = this.endOffset;\n\t\t\tthis.commonAncestorContainer = this.endOffset.parentNode;\n\t\t}\n\t}\n\n\tselectNode(referenceNode) {\n\t\tlet parent = referenceNode.parentNode;\n\t\tlet index = Array.prototype.indexOf.call(parent.childNodes, referenceNode);\n\t\tthis.setStart(parent, index);\n\t\tthis.setEnd(parent, index + 1);\n\t}\n\n\tselectNodeContents(referenceNode) {\n\t\tlet end = referenceNode.childNodes[referenceNode.childNodes - 1];\n\t\tlet endIndex = (referenceNode.nodeType === 3) ?\n\t\t\t\treferenceNode.textContent.length : parent.childNodes.length;\n\t\tthis.setStart(referenceNode, 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