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10 |
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11 | 'use strict';
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12 |
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13 | function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
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14 |
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15 | var UserAgent = require("fbjs/lib/UserAgent");
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16 |
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17 | var findAncestorOffsetKey = require("./findAncestorOffsetKey");
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18 |
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19 | var getWindowForNode = require("./getWindowForNode");
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20 |
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21 | var Immutable = require("immutable");
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22 |
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23 | var invariant = require("fbjs/lib/invariant");
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24 |
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25 | var nullthrows = require("fbjs/lib/nullthrows");
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26 |
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27 | var Map = Immutable.Map;
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28 |
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29 | var DOM_OBSERVER_OPTIONS = {
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30 | subtree: true,
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31 | characterData: true,
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32 | childList: true,
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33 | characterDataOldValue: false,
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34 | attributes: false
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35 | };
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36 |
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37 | var USE_CHAR_DATA = UserAgent.isBrowser('IE <= 11');
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38 |
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39 | var DOMObserver = function () {
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40 | function DOMObserver(container) {
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41 | var _this = this;
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42 |
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43 | _defineProperty(this, "observer", void 0);
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44 |
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45 | _defineProperty(this, "container", void 0);
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46 |
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47 | _defineProperty(this, "mutations", void 0);
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48 |
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49 | _defineProperty(this, "onCharData", void 0);
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50 |
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51 | this.container = container;
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52 | this.mutations = Map();
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53 | var containerWindow = getWindowForNode(container);
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54 |
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55 | if (containerWindow.MutationObserver && !USE_CHAR_DATA) {
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56 | this.observer = new containerWindow.MutationObserver(function (mutations) {
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57 | return _this.registerMutations(mutations);
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58 | });
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59 | } else {
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60 | this.onCharData = function (e) {
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61 | !(e.target instanceof Node) ? process.env.NODE_ENV !== "production" ? invariant(false, 'Expected target to be an instance of Node') : invariant(false) : void 0;
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62 |
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63 | _this.registerMutation({
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64 | type: 'characterData',
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65 | target: e.target
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66 | });
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67 | };
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68 | }
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69 | }
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70 |
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71 | var _proto = DOMObserver.prototype;
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72 |
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73 | _proto.start = function start() {
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74 | if (this.observer) {
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75 | this.observer.observe(this.container, DOM_OBSERVER_OPTIONS);
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76 | } else {
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77 | |
78 |
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79 | this.container.addEventListener('DOMCharacterDataModified', this.onCharData);
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80 | }
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81 | };
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82 |
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83 | _proto.stopAndFlushMutations = function stopAndFlushMutations() {
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84 | var observer = this.observer;
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85 |
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86 | if (observer) {
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87 | this.registerMutations(observer.takeRecords());
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88 | observer.disconnect();
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89 | } else {
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90 | |
91 |
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92 | this.container.removeEventListener('DOMCharacterDataModified', this.onCharData);
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93 | }
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94 |
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95 | var mutations = this.mutations;
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96 | this.mutations = Map();
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97 | return mutations;
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98 | };
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99 |
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100 | _proto.registerMutations = function registerMutations(mutations) {
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101 | for (var i = 0; i < mutations.length; i++) {
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102 | this.registerMutation(mutations[i]);
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103 | }
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104 | };
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105 |
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106 | _proto.getMutationTextContent = function getMutationTextContent(mutation) {
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107 | var type = mutation.type,
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108 | target = mutation.target,
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109 | removedNodes = mutation.removedNodes;
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110 |
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111 | if (type === 'characterData') {
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112 |
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113 |
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114 |
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115 |
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116 | if (target.textContent !== '') {
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117 |
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118 |
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119 |
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120 | if (USE_CHAR_DATA) {
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121 | return target.textContent.replace('\n', '');
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122 | }
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123 |
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124 | return target.textContent;
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125 | }
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126 | } else if (type === 'childList') {
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127 | if (removedNodes && removedNodes.length) {
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128 |
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129 |
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130 |
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131 |
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132 |
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133 |
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134 | return '';
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135 | } else if (target.textContent !== '') {
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136 |
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137 |
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138 |
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139 | return target.textContent;
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140 | }
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141 | }
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142 |
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143 | return null;
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144 | };
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145 |
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146 | _proto.registerMutation = function registerMutation(mutation) {
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147 | var textContent = this.getMutationTextContent(mutation);
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148 |
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149 | if (textContent != null) {
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150 | var offsetKey = nullthrows(findAncestorOffsetKey(mutation.target));
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151 | this.mutations = this.mutations.set(offsetKey, textContent);
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152 | }
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153 | };
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154 |
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155 | return DOMObserver;
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156 | }();
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157 |
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158 | module.exports = DOMObserver; |
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