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9 |
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10 | 'use strict';
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11 |
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12 | var REACT_ELEMENT_TYPE = require('./ReactElementSymbol');
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13 |
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14 | var _require = require('./ReactCoroutine'),
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15 | REACT_COROUTINE_TYPE = _require.REACT_COROUTINE_TYPE,
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16 | REACT_YIELD_TYPE = _require.REACT_YIELD_TYPE;
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17 |
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18 | var ReactFiber = require('./ReactFiber');
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19 | var ReactReifiedYield = require('./ReactReifiedYield');
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20 |
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21 | var cloneFiber = ReactFiber.cloneFiber,
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22 | createFiberFromElement = ReactFiber.createFiberFromElement,
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23 | createFiberFromCoroutine = ReactFiber.createFiberFromCoroutine,
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24 | createFiberFromYield = ReactFiber.createFiberFromYield;
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25 | var createReifiedYield = ReactReifiedYield.createReifiedYield;
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26 |
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27 |
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28 | var isArray = Array.isArray;
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29 |
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30 | function ChildReconciler(shouldClone) {
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31 | function createSubsequentChild(returnFiber, existingChild, previousSibling, newChildren, priority) {
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32 | if (typeof newChildren !== 'object' || newChildren === null) {
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33 | return previousSibling;
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34 | }
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35 |
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36 | switch (newChildren.$$typeof) {
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37 | case REACT_ELEMENT_TYPE:
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38 | {
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39 | var element = newChildren;
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40 | if (existingChild && element.type === existingChild.type && element.key === existingChild.key) {
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41 |
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42 |
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43 | var clone = shouldClone ? cloneFiber(existingChild, priority) : existingChild;
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44 | if (!shouldClone) {
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45 |
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46 | clone.pendingWorkPriority = priority;
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47 | }
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48 | clone.pendingProps = element.props;
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49 | clone.sibling = null;
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50 | clone['return'] = returnFiber;
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51 | previousSibling.sibling = clone;
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52 | return clone;
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53 | }
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54 | var child = createFiberFromElement(element, priority);
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55 | previousSibling.sibling = child;
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56 | child['return'] = returnFiber;
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57 | return child;
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58 | }
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59 |
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60 | case REACT_COROUTINE_TYPE:
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61 | {
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62 | var coroutine = newChildren;
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63 | var _child = createFiberFromCoroutine(coroutine, priority);
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64 | previousSibling.sibling = _child;
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65 | _child['return'] = returnFiber;
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66 | return _child;
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67 | }
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68 |
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69 | case REACT_YIELD_TYPE:
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70 | {
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71 | var yieldNode = newChildren;
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72 | var reifiedYield = createReifiedYield(yieldNode);
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73 | var _child2 = createFiberFromYield(yieldNode, priority);
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74 | _child2.output = reifiedYield;
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75 | previousSibling.sibling = _child2;
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76 | _child2['return'] = returnFiber;
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77 | return _child2;
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78 | }
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79 | }
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80 |
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81 | if (isArray(newChildren)) {
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82 | var prev = previousSibling;
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83 | var existing = existingChild;
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84 | for (var i = 0; i < newChildren.length; i++) {
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85 | var nextExisting = existing && existing.sibling;
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86 | prev = createSubsequentChild(returnFiber, existing, prev, newChildren[i], priority);
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87 | if (prev && existing) {
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88 |
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89 |
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90 | existing = nextExisting;
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91 | }
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92 | }
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93 | return prev;
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94 | } else {
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95 |
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96 | return previousSibling;
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97 | }
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98 | }
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99 |
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100 | function createFirstChild(returnFiber, existingChild, newChildren, priority) {
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101 | if (typeof newChildren !== 'object' || newChildren === null) {
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102 | return null;
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103 | }
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104 |
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105 | switch (newChildren.$$typeof) {
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106 | case REACT_ELEMENT_TYPE:
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107 | {
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108 | |
109 |
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110 |
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111 |
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112 | var element = newChildren;
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113 | if (existingChild && element.type === existingChild.type && element.key === existingChild.key) {
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114 |
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115 | var clone = shouldClone ? cloneFiber(existingChild, priority) : existingChild;
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116 | if (!shouldClone) {
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117 |
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118 | clone.pendingWorkPriority = priority;
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119 | }
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120 | clone.pendingProps = element.props;
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121 | clone.sibling = null;
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122 | clone['return'] = returnFiber;
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123 | return clone;
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124 | }
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125 | var child = createFiberFromElement(element, priority);
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126 | child['return'] = returnFiber;
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127 | return child;
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128 | }
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129 |
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130 | case REACT_COROUTINE_TYPE:
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131 | {
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132 | |
133 |
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134 | var coroutine = newChildren;
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135 | var _child3 = createFiberFromCoroutine(coroutine, priority);
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136 | _child3['return'] = returnFiber;
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137 | return _child3;
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138 | }
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139 |
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140 | case REACT_YIELD_TYPE:
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141 | {
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142 |
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143 |
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144 |
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145 | |
146 |
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147 |
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148 | var yieldNode = newChildren;
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149 | var reifiedYield = createReifiedYield(yieldNode);
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150 | var _child4 = createFiberFromYield(yieldNode, priority);
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151 | _child4.output = reifiedYield;
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152 | _child4['return'] = returnFiber;
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153 | return _child4;
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154 | }
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155 | }
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156 |
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157 | if (isArray(newChildren)) {
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158 | var first = null;
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159 | var prev = null;
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160 | var existing = existingChild;
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161 | |
162 |
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163 |
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164 |
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165 |
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166 | for (var i = 0; i < newChildren.length; i++) {
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167 | var nextExisting = existing && existing.sibling;
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168 | if (prev == null) {
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169 | prev = createFirstChild(returnFiber, existing, newChildren[i], priority);
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170 | first = prev;
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171 | } else {
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172 | prev = createSubsequentChild(returnFiber, existing, prev, newChildren[i], priority);
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173 | }
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174 | if (prev && existing) {
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175 |
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176 |
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177 | existing = nextExisting;
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178 | }
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179 | }
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180 | return first;
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181 | } else {
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182 |
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183 | return null;
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184 | }
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185 | }
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186 |
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187 |
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188 |
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189 | function reconcileChildFibers(returnFiber, currentFirstChild, newChildren, priority) {
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190 | return createFirstChild(returnFiber, currentFirstChild, newChildren, priority);
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191 | }
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192 |
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193 | return reconcileChildFibers;
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194 | }
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195 |
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196 | exports.reconcileChildFibers = ChildReconciler(true);
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197 |
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198 | exports.reconcileChildFibersInPlace = ChildReconciler(false);
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199 |
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200 | function cloneSiblings(current, workInProgress, returnFiber) {
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201 | workInProgress['return'] = returnFiber;
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202 | while (current.sibling) {
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203 | current = current.sibling;
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204 | workInProgress = workInProgress.sibling = cloneFiber(current, current.pendingWorkPriority);
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205 | workInProgress['return'] = returnFiber;
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206 | }
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207 | workInProgress.sibling = null;
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208 | }
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209 |
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210 | exports.cloneChildFibers = function (current, workInProgress) {
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211 | if (!workInProgress.child) {
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212 | return;
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213 | }
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214 | if (current && workInProgress.child === current.child) {
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215 |
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216 |
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217 |
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218 | var currentChild = workInProgress.child;
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219 |
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220 |
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221 |
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222 |
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223 |
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224 |
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225 |
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226 | var newChild = cloneFiber(currentChild, currentChild.pendingWorkPriority);
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227 | workInProgress.child = newChild;
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228 | cloneSiblings(currentChild, newChild, workInProgress);
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229 | }
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230 |
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231 |
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232 |
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233 |
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234 |
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235 | var child = workInProgress.child;
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236 | while (child) {
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237 | child['return'] = workInProgress;
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238 | child = child.sibling;
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239 | }
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240 | }; |
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