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9 |
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10 | 'use strict';
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11 |
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12 |
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13 |
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14 | if (process.env.NODE_ENV !== "production") {
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15 | (function() {
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16 | 'use strict';
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17 |
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18 | Object.defineProperty(exports, '__esModule', { value: true });
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19 |
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20 | var enableSchedulerDebugging = false;
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21 |
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22 |
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23 |
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24 |
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25 | var ImmediatePriority = 1;
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26 | var UserBlockingPriority = 2;
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27 | var NormalPriority = 3;
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28 | var LowPriority = 4;
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29 | var IdlePriority = 5;
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30 |
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31 |
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32 |
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33 |
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34 | var maxSigned31BitInt = 1073741823;
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35 |
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36 |
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37 | var IMMEDIATE_PRIORITY_TIMEOUT = -1;
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38 |
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39 | var USER_BLOCKING_PRIORITY = 250;
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40 | var NORMAL_PRIORITY_TIMEOUT = 5000;
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41 | var LOW_PRIORITY_TIMEOUT = 10000;
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42 |
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43 | var IDLE_PRIORITY = maxSigned31BitInt;
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44 |
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45 |
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46 | var firstCallbackNode = null;
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47 |
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48 | var currentDidTimeout = false;
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49 |
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50 | var isSchedulerPaused = false;
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51 |
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52 | var currentPriorityLevel = NormalPriority;
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53 | var currentEventStartTime = -1;
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54 | var currentExpirationTime = -1;
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55 |
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56 |
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57 | var isExecutingCallback = false;
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58 |
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59 | var isHostCallbackScheduled = false;
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60 |
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61 | var hasNativePerformanceNow = typeof performance === 'object' && typeof performance.now === 'function';
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62 |
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63 | function ensureHostCallbackIsScheduled() {
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64 | if (isExecutingCallback) {
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65 |
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66 | return;
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67 | }
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68 |
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69 | var expirationTime = firstCallbackNode.expirationTime;
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70 | if (!isHostCallbackScheduled) {
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71 | isHostCallbackScheduled = true;
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72 | } else {
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73 |
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74 | cancelHostCallback();
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75 | }
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76 | requestHostCallback(flushWork, expirationTime);
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77 | }
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78 |
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79 | function flushFirstCallback() {
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80 | var flushedNode = firstCallbackNode;
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81 |
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82 |
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83 |
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84 | var next = firstCallbackNode.next;
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85 | if (firstCallbackNode === next) {
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86 |
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87 | firstCallbackNode = null;
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88 | next = null;
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89 | } else {
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90 | var lastCallbackNode = firstCallbackNode.previous;
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91 | firstCallbackNode = lastCallbackNode.next = next;
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92 | next.previous = lastCallbackNode;
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93 | }
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94 |
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95 | flushedNode.next = flushedNode.previous = null;
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96 |
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97 |
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98 | var callback = flushedNode.callback;
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99 | var expirationTime = flushedNode.expirationTime;
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100 | var priorityLevel = flushedNode.priorityLevel;
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101 | var previousPriorityLevel = currentPriorityLevel;
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102 | var previousExpirationTime = currentExpirationTime;
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103 | currentPriorityLevel = priorityLevel;
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104 | currentExpirationTime = expirationTime;
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105 | var continuationCallback;
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106 | try {
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107 | continuationCallback = callback();
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108 | } finally {
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109 | currentPriorityLevel = previousPriorityLevel;
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110 | currentExpirationTime = previousExpirationTime;
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111 | }
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112 |
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113 |
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114 |
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115 | if (typeof continuationCallback === 'function') {
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116 | var continuationNode = {
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117 | callback: continuationCallback,
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118 | priorityLevel: priorityLevel,
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119 | expirationTime: expirationTime,
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120 | next: null,
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121 | previous: null
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122 | };
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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 |
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128 | if (firstCallbackNode === null) {
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129 |
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130 | firstCallbackNode = continuationNode.next = continuationNode.previous = continuationNode;
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131 | } else {
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132 | var nextAfterContinuation = null;
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133 | var node = firstCallbackNode;
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134 | do {
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135 | if (node.expirationTime >= expirationTime) {
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136 |
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137 |
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138 | nextAfterContinuation = node;
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139 | break;
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140 | }
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141 | node = node.next;
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142 | } while (node !== firstCallbackNode);
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143 |
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144 | if (nextAfterContinuation === null) {
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145 |
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146 |
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147 | nextAfterContinuation = firstCallbackNode;
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148 | } else if (nextAfterContinuation === firstCallbackNode) {
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149 |
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150 | firstCallbackNode = continuationNode;
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151 | ensureHostCallbackIsScheduled();
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152 | }
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153 |
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154 | var previous = nextAfterContinuation.previous;
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155 | previous.next = nextAfterContinuation.previous = continuationNode;
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156 | continuationNode.next = nextAfterContinuation;
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157 | continuationNode.previous = previous;
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158 | }
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159 | }
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160 | }
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161 |
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162 | function flushImmediateWork() {
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163 | if (
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164 |
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165 | currentEventStartTime === -1 && firstCallbackNode !== null && firstCallbackNode.priorityLevel === ImmediatePriority) {
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166 | isExecutingCallback = true;
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167 | try {
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168 | do {
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169 | flushFirstCallback();
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170 | } while (
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171 |
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172 | firstCallbackNode !== null && firstCallbackNode.priorityLevel === ImmediatePriority);
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173 | } finally {
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174 | isExecutingCallback = false;
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175 | if (firstCallbackNode !== null) {
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176 |
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177 | ensureHostCallbackIsScheduled();
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178 | } else {
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179 | isHostCallbackScheduled = false;
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180 | }
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181 | }
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182 | }
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183 | }
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184 |
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185 | function flushWork(didTimeout) {
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186 |
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187 |
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188 | if (enableSchedulerDebugging && isSchedulerPaused) {
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189 | return;
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190 | }
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191 |
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192 | isExecutingCallback = true;
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193 | var previousDidTimeout = currentDidTimeout;
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194 | currentDidTimeout = didTimeout;
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195 | try {
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196 | if (didTimeout) {
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197 |
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198 | while (firstCallbackNode !== null && !(enableSchedulerDebugging && isSchedulerPaused)) {
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199 |
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200 |
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201 |
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202 |
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203 | var currentTime = exports.unstable_now();
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204 | if (firstCallbackNode.expirationTime <= currentTime) {
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205 | do {
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206 | flushFirstCallback();
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207 | } while (firstCallbackNode !== null && firstCallbackNode.expirationTime <= currentTime && !(enableSchedulerDebugging && isSchedulerPaused));
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208 | continue;
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209 | }
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210 | break;
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211 | }
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212 | } else {
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213 |
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214 | if (firstCallbackNode !== null) {
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215 | do {
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216 | if (enableSchedulerDebugging && isSchedulerPaused) {
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217 | break;
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218 | }
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219 | flushFirstCallback();
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220 | } while (firstCallbackNode !== null && !shouldYieldToHost());
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221 | }
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222 | }
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223 | } finally {
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224 | isExecutingCallback = false;
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225 | currentDidTimeout = previousDidTimeout;
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226 | if (firstCallbackNode !== null) {
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227 |
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228 | ensureHostCallbackIsScheduled();
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229 | } else {
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230 | isHostCallbackScheduled = false;
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231 | }
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232 |
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233 | flushImmediateWork();
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234 | }
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235 | }
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236 |
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237 | function unstable_runWithPriority(priorityLevel, eventHandler) {
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238 | switch (priorityLevel) {
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239 | case ImmediatePriority:
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240 | case UserBlockingPriority:
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241 | case NormalPriority:
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242 | case LowPriority:
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243 | case IdlePriority:
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244 | break;
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245 | default:
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246 | priorityLevel = NormalPriority;
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247 | }
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248 |
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249 | var previousPriorityLevel = currentPriorityLevel;
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250 | var previousEventStartTime = currentEventStartTime;
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251 | currentPriorityLevel = priorityLevel;
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252 | currentEventStartTime = exports.unstable_now();
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253 |
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254 | try {
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255 | return eventHandler();
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256 | } finally {
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257 | currentPriorityLevel = previousPriorityLevel;
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258 | currentEventStartTime = previousEventStartTime;
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259 |
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260 |
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261 | flushImmediateWork();
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262 | }
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263 | }
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264 |
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265 | function unstable_wrapCallback(callback) {
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266 | var parentPriorityLevel = currentPriorityLevel;
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267 | return function () {
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268 |
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269 | var previousPriorityLevel = currentPriorityLevel;
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270 | var previousEventStartTime = currentEventStartTime;
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271 | currentPriorityLevel = parentPriorityLevel;
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272 | currentEventStartTime = exports.unstable_now();
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273 |
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274 | try {
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275 | return callback.apply(this, arguments);
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276 | } finally {
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277 | currentPriorityLevel = previousPriorityLevel;
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278 | currentEventStartTime = previousEventStartTime;
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279 | flushImmediateWork();
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280 | }
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281 | };
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282 | }
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283 |
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284 | function unstable_scheduleCallback(callback, deprecated_options) {
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285 | var startTime = currentEventStartTime !== -1 ? currentEventStartTime : exports.unstable_now();
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286 |
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287 | var expirationTime;
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288 | if (typeof deprecated_options === 'object' && deprecated_options !== null && typeof deprecated_options.timeout === 'number') {
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289 |
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290 | expirationTime = startTime + deprecated_options.timeout;
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291 | } else {
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292 | switch (currentPriorityLevel) {
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293 | case ImmediatePriority:
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294 | expirationTime = startTime + IMMEDIATE_PRIORITY_TIMEOUT;
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295 | break;
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296 | case UserBlockingPriority:
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297 | expirationTime = startTime + USER_BLOCKING_PRIORITY;
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298 | break;
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299 | case IdlePriority:
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300 | expirationTime = startTime + IDLE_PRIORITY;
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301 | break;
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302 | case LowPriority:
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303 | expirationTime = startTime + LOW_PRIORITY_TIMEOUT;
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304 | break;
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305 | case NormalPriority:
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306 | default:
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307 | expirationTime = startTime + NORMAL_PRIORITY_TIMEOUT;
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308 | }
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309 | }
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310 |
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311 | var newNode = {
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312 | callback: callback,
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313 | priorityLevel: currentPriorityLevel,
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314 | expirationTime: expirationTime,
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315 | next: null,
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316 | previous: null
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317 | };
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318 |
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319 |
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320 |
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321 |
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322 | if (firstCallbackNode === null) {
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323 |
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324 | firstCallbackNode = newNode.next = newNode.previous = newNode;
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325 | ensureHostCallbackIsScheduled();
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326 | } else {
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327 | var next = null;
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328 | var node = firstCallbackNode;
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329 | do {
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330 | if (node.expirationTime > expirationTime) {
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331 |
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332 | next = node;
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333 | break;
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334 | }
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335 | node = node.next;
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336 | } while (node !== firstCallbackNode);
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337 |
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338 | if (next === null) {
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339 |
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340 |
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341 | next = firstCallbackNode;
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342 | } else if (next === firstCallbackNode) {
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343 |
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344 | firstCallbackNode = newNode;
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345 | ensureHostCallbackIsScheduled();
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346 | }
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347 |
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348 | var previous = next.previous;
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349 | previous.next = next.previous = newNode;
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350 | newNode.next = next;
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351 | newNode.previous = previous;
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352 | }
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353 |
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354 | return newNode;
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355 | }
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356 |
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357 | function unstable_pauseExecution() {
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358 | isSchedulerPaused = true;
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359 | }
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360 |
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361 | function unstable_continueExecution() {
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362 | isSchedulerPaused = false;
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363 | if (firstCallbackNode !== null) {
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364 | ensureHostCallbackIsScheduled();
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365 | }
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366 | }
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367 |
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368 | function unstable_getFirstCallbackNode() {
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369 | return firstCallbackNode;
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370 | }
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371 |
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372 | function unstable_cancelCallback(callbackNode) {
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373 | var next = callbackNode.next;
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374 | if (next === null) {
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375 |
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376 | return;
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377 | }
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378 |
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379 | if (next === callbackNode) {
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380 |
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381 | firstCallbackNode = null;
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382 | } else {
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383 |
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384 | if (callbackNode === firstCallbackNode) {
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385 | firstCallbackNode = next;
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386 | }
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387 | var previous = callbackNode.previous;
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388 | previous.next = next;
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389 | next.previous = previous;
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390 | }
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391 |
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392 | callbackNode.next = callbackNode.previous = null;
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393 | }
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394 |
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395 | function unstable_getCurrentPriorityLevel() {
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396 | return currentPriorityLevel;
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397 | }
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398 |
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399 | function unstable_shouldYield() {
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400 | return !currentDidTimeout && (firstCallbackNode !== null && firstCallbackNode.expirationTime < currentExpirationTime || shouldYieldToHost());
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401 | }
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402 |
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403 |
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404 |
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405 |
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406 |
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407 |
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408 |
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409 |
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410 |
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411 |
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412 |
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413 |
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414 | var localDate = Date;
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415 |
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416 |
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417 |
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418 |
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419 |
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420 | var localSetTimeout = typeof setTimeout === 'function' ? setTimeout : undefined;
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421 | var localClearTimeout = typeof clearTimeout === 'function' ? clearTimeout : undefined;
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422 |
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423 |
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424 |
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425 | var localRequestAnimationFrame = typeof requestAnimationFrame === 'function' ? requestAnimationFrame : undefined;
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426 | var localCancelAnimationFrame = typeof cancelAnimationFrame === 'function' ? cancelAnimationFrame : undefined;
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427 |
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428 |
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429 |
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430 |
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431 |
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432 |
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433 | var ANIMATION_FRAME_TIMEOUT = 100;
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434 | var rAFID;
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435 | var rAFTimeoutID;
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436 | var requestAnimationFrameWithTimeout = function (callback) {
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437 |
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438 | rAFID = localRequestAnimationFrame(function (timestamp) {
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439 |
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440 | localClearTimeout(rAFTimeoutID);
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441 | callback(timestamp);
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442 | });
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443 | rAFTimeoutID = localSetTimeout(function () {
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444 |
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445 | localCancelAnimationFrame(rAFID);
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446 | callback(exports.unstable_now());
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447 | }, ANIMATION_FRAME_TIMEOUT);
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448 | };
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449 |
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450 | if (hasNativePerformanceNow) {
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451 | var Performance = performance;
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452 | exports.unstable_now = function () {
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453 | return Performance.now();
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454 | };
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455 | } else {
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456 | exports.unstable_now = function () {
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457 | return localDate.now();
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458 | };
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459 | }
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460 |
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461 | var requestHostCallback;
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462 | var cancelHostCallback;
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463 | var shouldYieldToHost;
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464 |
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465 | var globalValue = null;
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466 | if (typeof window !== 'undefined') {
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467 | globalValue = window;
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468 | } else if (typeof global !== 'undefined') {
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469 | globalValue = global;
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470 | }
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471 |
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472 | if (globalValue && globalValue._schedMock) {
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473 |
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474 | var globalImpl = globalValue._schedMock;
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475 | requestHostCallback = globalImpl[0];
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476 | cancelHostCallback = globalImpl[1];
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477 | shouldYieldToHost = globalImpl[2];
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478 | exports.unstable_now = globalImpl[3];
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479 | } else if (
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480 |
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481 |
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482 | typeof window === 'undefined' ||
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483 |
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484 | typeof MessageChannel !== 'function') {
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485 |
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486 |
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487 | var _callback = null;
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488 | var _flushCallback = function (didTimeout) {
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489 | if (_callback !== null) {
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490 | try {
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491 | _callback(didTimeout);
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492 | } finally {
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493 | _callback = null;
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494 | }
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495 | }
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496 | };
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497 | requestHostCallback = function (cb, ms) {
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498 | if (_callback !== null) {
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499 |
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500 | setTimeout(requestHostCallback, 0, cb);
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501 | } else {
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502 | _callback = cb;
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503 | setTimeout(_flushCallback, 0, false);
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504 | }
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505 | };
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506 | cancelHostCallback = function () {
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507 | _callback = null;
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508 | };
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509 | shouldYieldToHost = function () {
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510 | return false;
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511 | };
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512 | } else {
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513 | if (typeof console !== 'undefined') {
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514 |
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515 | if (typeof localRequestAnimationFrame !== 'function') {
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516 | console.error("This browser doesn't support requestAnimationFrame. " + 'Make sure that you load a ' + 'polyfill in older browsers. https://fb.me/react-polyfills');
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517 | }
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518 | if (typeof localCancelAnimationFrame !== 'function') {
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519 | console.error("This browser doesn't support cancelAnimationFrame. " + 'Make sure that you load a ' + 'polyfill in older browsers. https://fb.me/react-polyfills');
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520 | }
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521 | }
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522 |
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523 | var scheduledHostCallback = null;
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524 | var isMessageEventScheduled = false;
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525 | var timeoutTime = -1;
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526 |
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527 | var isAnimationFrameScheduled = false;
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528 |
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529 | var isFlushingHostCallback = false;
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530 |
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531 | var frameDeadline = 0;
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532 |
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533 |
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534 |
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535 | var previousFrameTime = 33;
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536 | var activeFrameTime = 33;
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537 |
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538 | shouldYieldToHost = function () {
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539 | return frameDeadline <= exports.unstable_now();
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540 | };
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541 |
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542 |
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543 | var channel = new MessageChannel();
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544 | var port = channel.port2;
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545 | channel.port1.onmessage = function (event) {
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546 | isMessageEventScheduled = false;
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547 |
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548 | var prevScheduledCallback = scheduledHostCallback;
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549 | var prevTimeoutTime = timeoutTime;
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550 | scheduledHostCallback = null;
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551 | timeoutTime = -1;
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552 |
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553 | var currentTime = exports.unstable_now();
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554 |
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555 | var didTimeout = false;
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556 | if (frameDeadline - currentTime <= 0) {
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557 |
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558 |
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559 | if (prevTimeoutTime !== -1 && prevTimeoutTime <= currentTime) {
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560 |
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561 |
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562 | didTimeout = true;
|
563 | } else {
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564 |
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565 | if (!isAnimationFrameScheduled) {
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566 |
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567 | isAnimationFrameScheduled = true;
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568 | requestAnimationFrameWithTimeout(animationTick);
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569 | }
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570 |
|
571 | scheduledHostCallback = prevScheduledCallback;
|
572 | timeoutTime = prevTimeoutTime;
|
573 | return;
|
574 | }
|
575 | }
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576 |
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577 | if (prevScheduledCallback !== null) {
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578 | isFlushingHostCallback = true;
|
579 | try {
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580 | prevScheduledCallback(didTimeout);
|
581 | } finally {
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582 | isFlushingHostCallback = false;
|
583 | }
|
584 | }
|
585 | };
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586 |
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587 | var animationTick = function (rafTime) {
|
588 | if (scheduledHostCallback !== null) {
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589 |
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590 |
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591 |
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592 |
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593 |
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594 |
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595 |
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596 |
|
597 | requestAnimationFrameWithTimeout(animationTick);
|
598 | } else {
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599 |
|
600 | isAnimationFrameScheduled = false;
|
601 | return;
|
602 | }
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603 |
|
604 | var nextFrameTime = rafTime - frameDeadline + activeFrameTime;
|
605 | if (nextFrameTime < activeFrameTime && previousFrameTime < activeFrameTime) {
|
606 | if (nextFrameTime < 8) {
|
607 |
|
608 |
|
609 | nextFrameTime = 8;
|
610 | }
|
611 |
|
612 |
|
613 |
|
614 |
|
615 |
|
616 |
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617 |
|
618 | activeFrameTime = nextFrameTime < previousFrameTime ? previousFrameTime : nextFrameTime;
|
619 | } else {
|
620 | previousFrameTime = nextFrameTime;
|
621 | }
|
622 | frameDeadline = rafTime + activeFrameTime;
|
623 | if (!isMessageEventScheduled) {
|
624 | isMessageEventScheduled = true;
|
625 | port.postMessage(undefined);
|
626 | }
|
627 | };
|
628 |
|
629 | requestHostCallback = function (callback, absoluteTimeout) {
|
630 | scheduledHostCallback = callback;
|
631 | timeoutTime = absoluteTimeout;
|
632 | if (isFlushingHostCallback || absoluteTimeout < 0) {
|
633 |
|
634 | port.postMessage(undefined);
|
635 | } else if (!isAnimationFrameScheduled) {
|
636 |
|
637 |
|
638 |
|
639 |
|
640 | isAnimationFrameScheduled = true;
|
641 | requestAnimationFrameWithTimeout(animationTick);
|
642 | }
|
643 | };
|
644 |
|
645 | cancelHostCallback = function () {
|
646 | scheduledHostCallback = null;
|
647 | isMessageEventScheduled = false;
|
648 | timeoutTime = -1;
|
649 | };
|
650 | }
|
651 |
|
652 | exports.unstable_ImmediatePriority = ImmediatePriority;
|
653 | exports.unstable_UserBlockingPriority = UserBlockingPriority;
|
654 | exports.unstable_NormalPriority = NormalPriority;
|
655 | exports.unstable_IdlePriority = IdlePriority;
|
656 | exports.unstable_LowPriority = LowPriority;
|
657 | exports.unstable_runWithPriority = unstable_runWithPriority;
|
658 | exports.unstable_scheduleCallback = unstable_scheduleCallback;
|
659 | exports.unstable_cancelCallback = unstable_cancelCallback;
|
660 | exports.unstable_wrapCallback = unstable_wrapCallback;
|
661 | exports.unstable_getCurrentPriorityLevel = unstable_getCurrentPriorityLevel;
|
662 | exports.unstable_shouldYield = unstable_shouldYield;
|
663 | exports.unstable_continueExecution = unstable_continueExecution;
|
664 | exports.unstable_pauseExecution = unstable_pauseExecution;
|
665 | exports.unstable_getFirstCallbackNode = unstable_getFirstCallbackNode;
|
666 | })();
|
667 | }
|