source: trip-planner-front/node_modules/parse5/lib/serializer/index.js@ 6a3a178

Last change on this file since 6a3a178 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

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1'use strict';
2
3const defaultTreeAdapter = require('../tree-adapters/default');
4const mergeOptions = require('../utils/merge-options');
5const doctype = require('../common/doctype');
6const HTML = require('../common/html');
7
8//Aliases
9const $ = HTML.TAG_NAMES;
10const NS = HTML.NAMESPACES;
11
12//Default serializer options
13const DEFAULT_OPTIONS = {
14 treeAdapter: defaultTreeAdapter
15};
16
17//Escaping regexes
18const AMP_REGEX = /&/g;
19const NBSP_REGEX = /\u00a0/g;
20const DOUBLE_QUOTE_REGEX = /"/g;
21const LT_REGEX = /</g;
22const GT_REGEX = />/g;
23
24//Serializer
25class Serializer {
26 constructor(node, options) {
27 this.options = mergeOptions(DEFAULT_OPTIONS, options);
28 this.treeAdapter = this.options.treeAdapter;
29
30 this.html = '';
31 this.startNode = node;
32 }
33
34 //API
35 serialize() {
36 this._serializeChildNodes(this.startNode);
37
38 return this.html;
39 }
40
41 //Internals
42 _serializeChildNodes(parentNode) {
43 const childNodes = this.treeAdapter.getChildNodes(parentNode);
44
45 if (childNodes) {
46 for (let i = 0, cnLength = childNodes.length; i < cnLength; i++) {
47 const currentNode = childNodes[i];
48
49 if (this.treeAdapter.isElementNode(currentNode)) {
50 this._serializeElement(currentNode);
51 } else if (this.treeAdapter.isTextNode(currentNode)) {
52 this._serializeTextNode(currentNode);
53 } else if (this.treeAdapter.isCommentNode(currentNode)) {
54 this._serializeCommentNode(currentNode);
55 } else if (this.treeAdapter.isDocumentTypeNode(currentNode)) {
56 this._serializeDocumentTypeNode(currentNode);
57 }
58 }
59 }
60 }
61
62 _serializeElement(node) {
63 const tn = this.treeAdapter.getTagName(node);
64 const ns = this.treeAdapter.getNamespaceURI(node);
65
66 this.html += '<' + tn;
67 this._serializeAttributes(node);
68 this.html += '>';
69
70 if (
71 tn !== $.AREA &&
72 tn !== $.BASE &&
73 tn !== $.BASEFONT &&
74 tn !== $.BGSOUND &&
75 tn !== $.BR &&
76 tn !== $.COL &&
77 tn !== $.EMBED &&
78 tn !== $.FRAME &&
79 tn !== $.HR &&
80 tn !== $.IMG &&
81 tn !== $.INPUT &&
82 tn !== $.KEYGEN &&
83 tn !== $.LINK &&
84 tn !== $.META &&
85 tn !== $.PARAM &&
86 tn !== $.SOURCE &&
87 tn !== $.TRACK &&
88 tn !== $.WBR
89 ) {
90 const childNodesHolder =
91 tn === $.TEMPLATE && ns === NS.HTML ? this.treeAdapter.getTemplateContent(node) : node;
92
93 this._serializeChildNodes(childNodesHolder);
94 this.html += '</' + tn + '>';
95 }
96 }
97
98 _serializeAttributes(node) {
99 const attrs = this.treeAdapter.getAttrList(node);
100
101 for (let i = 0, attrsLength = attrs.length; i < attrsLength; i++) {
102 const attr = attrs[i];
103 const value = Serializer.escapeString(attr.value, true);
104
105 this.html += ' ';
106
107 if (!attr.namespace) {
108 this.html += attr.name;
109 } else if (attr.namespace === NS.XML) {
110 this.html += 'xml:' + attr.name;
111 } else if (attr.namespace === NS.XMLNS) {
112 if (attr.name !== 'xmlns') {
113 this.html += 'xmlns:';
114 }
115
116 this.html += attr.name;
117 } else if (attr.namespace === NS.XLINK) {
118 this.html += 'xlink:' + attr.name;
119 } else {
120 this.html += attr.prefix + ':' + attr.name;
121 }
122
123 this.html += '="' + value + '"';
124 }
125 }
126
127 _serializeTextNode(node) {
128 const content = this.treeAdapter.getTextNodeContent(node);
129 const parent = this.treeAdapter.getParentNode(node);
130 let parentTn = void 0;
131
132 if (parent && this.treeAdapter.isElementNode(parent)) {
133 parentTn = this.treeAdapter.getTagName(parent);
134 }
135
136 if (
137 parentTn === $.STYLE ||
138 parentTn === $.SCRIPT ||
139 parentTn === $.XMP ||
140 parentTn === $.IFRAME ||
141 parentTn === $.NOEMBED ||
142 parentTn === $.NOFRAMES ||
143 parentTn === $.PLAINTEXT ||
144 parentTn === $.NOSCRIPT
145 ) {
146 this.html += content;
147 } else {
148 this.html += Serializer.escapeString(content, false);
149 }
150 }
151
152 _serializeCommentNode(node) {
153 this.html += '<!--' + this.treeAdapter.getCommentNodeContent(node) + '-->';
154 }
155
156 _serializeDocumentTypeNode(node) {
157 const name = this.treeAdapter.getDocumentTypeNodeName(node);
158
159 this.html += '<' + doctype.serializeContent(name, null, null) + '>';
160 }
161}
162
163// NOTE: used in tests and by rewriting stream
164Serializer.escapeString = function(str, attrMode) {
165 str = str.replace(AMP_REGEX, '&amp;').replace(NBSP_REGEX, '&nbsp;');
166
167 if (attrMode) {
168 str = str.replace(DOUBLE_QUOTE_REGEX, '&quot;');
169 } else {
170 str = str.replace(LT_REGEX, '&lt;').replace(GT_REGEX, '&gt;');
171 }
172
173 return str;
174};
175
176module.exports = Serializer;
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