1 | 'use strict';
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2 |
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3 |
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4 |
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5 |
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6 |
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7 | const lang = require('zero-lang');
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8 |
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9 | function noop() {
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10 | }
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11 |
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12 | const domUtils = {
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13 | attributesAsObject: (doc) => {
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14 | const result = {};
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15 | const attributes = doc.attributes || [];
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16 | lang.each(attributes, (attr) => {
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17 | result[attr.name] = attr.value;
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18 | });
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19 | return result;
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20 | },
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21 |
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22 | findChildNode: (doc, query) => {
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23 | query = query || {};
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24 | if (!doc) {
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25 | return null;
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26 | }
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27 | return domUtils.findChildNodes(doc, query)[0];
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28 | },
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29 |
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30 | findChildNodes: (doc, query) => {
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31 | const FILTER_QUERY_PROPS = [
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32 | 'localName',
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33 | 'namespaceURI',
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34 | 'nodeName',
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35 | 'nodeType',
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36 | 'tagName',
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37 | ];
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38 | if (!doc) {
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39 | return [];
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40 | }
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41 | let resultNodes = doc.childNodes || [];
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42 | lang.each(FILTER_QUERY_PROPS, (prop) => {
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43 | if (query[prop]) {
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44 | resultNodes = lang.filter(doc.childNodes || [], (node) => (node[prop] === query[prop]));
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45 | }
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46 | });
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47 | const attrs = query.attributes || {};
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48 | return lang.filter(resultNodes, (node) => (
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49 | node && lang.every(lang.keys(attrs), (key) => (node.getAttribute(key) === attrs[key]))
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50 | ));
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51 | },
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52 |
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53 | findAllNodes: (doc, query) => {
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54 | let nodes = [];
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55 |
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56 | function findAllChildNodes(parentDoc) {
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57 | nodes = nodes.concat(domUtils.findChildNodes(parentDoc, query));
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58 | lang.each(parentDoc.childNodes || [], (node) => {
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59 | findAllChildNodes(node);
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60 | });
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61 | }
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62 |
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63 | findAllChildNodes(doc);
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64 | return nodes;
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65 | },
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66 |
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67 | findNode: (doc, query) => domUtils.findAllNodes(doc, query)[0],
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68 |
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69 | createChildNode: (doc, query) => {
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70 |
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71 | if (!doc) {
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72 | return null;
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73 | }
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74 | let ownerDoc = doc;
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75 | const tagName = query.tagName || 'child';
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76 | const attrs = query.attributes || {};
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77 |
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78 | if (!doc.createElement) {
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79 | ownerDoc = doc.ownerDocument;
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80 | }
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81 | const resultNode = ownerDoc.createElement(tagName);
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82 | lang.forIn(attrs, (value, key) => {
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83 | resultNode.setAttribute(key, value);
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84 | });
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85 |
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86 |
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87 |
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88 | doc.appendChild(resultNode);
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89 | return resultNode;
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90 | },
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91 |
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92 | findOrCreateChildNode: (doc, query) => {
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93 | if (!doc) {
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94 | return null;
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95 | }
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96 | let resultNode = domUtils.findChildNode(doc, query);
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97 | if (!resultNode) {
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98 | resultNode = domUtils.createChildNode(doc, query);
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99 | }
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100 | return resultNode;
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101 | },
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102 |
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103 | eachChildNode: (doc, query, callback) => {
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104 | callback = callback || noop;
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105 | lang.each(domUtils.findChildNodes(doc, query), (node) => {
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106 | callback(node);
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107 | });
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108 | },
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109 |
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110 | eachNode: (doc, query, callback) => {
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111 | callback = callback || noop;
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112 | lang.each(domUtils.findAllNodes(doc, query), (node) => {
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113 | callback(node);
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114 | });
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115 | },
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116 |
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117 | removeChildNode: (doc, query) => {
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118 | const resultNode = domUtils.findChildNode(doc, query);
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119 | if (resultNode) {
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120 | doc.removeChild(resultNode);
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121 | }
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122 | return resultNode;
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123 | },
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124 | };
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125 |
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126 |
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127 | const NODE_TYPES = {
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128 | ELEMENT_NODE: 1,
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129 | ATTRIBUTE_NODE: 2,
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130 | TEXT_NODE: 3,
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131 | CDATA_SECTION_NODE: 4,
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132 | ENTITY_REFERENCE_NODE: 5,
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133 | ENTITY_NODE: 6,
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134 | PROCESSING_INSTRUCTION_NODE: 7,
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135 | COMMENT_NODE: 8,
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136 | DOCUMENT_NODE: 9,
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137 | DOCUMENT_TYPE_NODE: 10,
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138 | DOCUMENT_FRAGMENT_NODE: 11,
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139 | NOTATION_NODE: 12,
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140 | };
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141 |
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142 | lang.extend(domUtils, {
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143 | findNodes: domUtils.findAllNodes,
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144 | NODE_TYPES,
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145 | }, NODE_TYPES);
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146 |
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147 | module.exports = domUtils;
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