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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 | var enableIsInputPending = false;
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22 | var requestIdleCallbackBeforeFirstFrame = false;
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23 | var requestTimerEventBeforeFirstFrame = false;
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24 | var enableMessageLoopImplementation = false;
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25 |
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26 |
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27 |
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28 |
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29 |
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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 requestHostCallback = void 0;
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35 |
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36 | var requestHostTimeout = void 0;
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37 | var cancelHostTimeout = void 0;
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38 | var shouldYieldToHost = void 0;
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39 | var requestPaint = void 0;
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40 | exports.unstable_now = void 0;
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41 | exports.unstable_forceFrameRate = void 0;
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42 |
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43 | if (
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44 |
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45 |
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46 | typeof window === 'undefined' ||
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47 |
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48 | typeof MessageChannel !== 'function') {
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49 |
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50 |
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51 | var _callback = null;
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52 | var _timeoutID = null;
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53 | var _flushCallback = function () {
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54 | if (_callback !== null) {
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55 | try {
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56 | var currentTime = exports.unstable_now();
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57 | var hasRemainingTime = true;
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58 | _callback(hasRemainingTime, currentTime);
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59 | _callback = null;
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60 | } catch (e) {
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61 | setTimeout(_flushCallback, 0);
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62 | throw e;
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63 | }
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64 | }
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65 | };
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66 | exports.unstable_now = function () {
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67 | return Date.now();
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68 | };
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69 | requestHostCallback = function (cb) {
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70 | if (_callback !== null) {
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71 |
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72 | setTimeout(requestHostCallback, 0, cb);
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73 | } else {
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74 | _callback = cb;
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75 | setTimeout(_flushCallback, 0);
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76 | }
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77 | };
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78 | requestHostTimeout = function (cb, ms) {
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79 | _timeoutID = setTimeout(cb, ms);
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80 | };
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81 | cancelHostTimeout = function () {
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82 | clearTimeout(_timeoutID);
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83 | };
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84 | shouldYieldToHost = function () {
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85 | return false;
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86 | };
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87 | requestPaint = exports.unstable_forceFrameRate = function () {};
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88 | } else {
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89 |
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90 | var performance = window.performance;
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91 | var _Date = window.Date;
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92 | var _setTimeout = window.setTimeout;
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93 | var _clearTimeout = window.clearTimeout;
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94 | var requestAnimationFrame = window.requestAnimationFrame;
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95 | var cancelAnimationFrame = window.cancelAnimationFrame;
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96 | var requestIdleCallback = window.requestIdleCallback;
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97 |
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98 | if (typeof console !== 'undefined') {
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99 |
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100 | if (typeof requestAnimationFrame !== 'function') {
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101 | 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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102 | }
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103 | if (typeof cancelAnimationFrame !== 'function') {
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104 | 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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105 | }
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106 | }
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107 |
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108 | var requestIdleCallbackBeforeFirstFrame$1 = requestIdleCallbackBeforeFirstFrame && typeof requestIdleCallback === 'function' && typeof cancelIdleCallback === 'function';
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109 |
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110 | exports.unstable_now = typeof performance === 'object' && typeof performance.now === 'function' ? function () {
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111 | return performance.now();
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112 | } : function () {
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113 | return _Date.now();
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114 | };
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115 |
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116 | var isRAFLoopRunning = false;
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117 | var isMessageLoopRunning = false;
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118 | var scheduledHostCallback = null;
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119 | var rAFTimeoutID = -1;
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120 | var taskTimeoutID = -1;
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121 |
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122 | var frameLength = enableMessageLoopImplementation ?
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123 |
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124 |
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125 | 5 :
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126 |
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127 |
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128 |
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129 | 33.33;
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130 |
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131 | var prevRAFTime = -1;
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132 | var prevRAFInterval = -1;
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133 | var frameDeadline = 0;
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134 |
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135 | var fpsLocked = false;
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136 |
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137 |
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138 |
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139 | var maxFrameLength = 300;
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140 | var needsPaint = false;
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141 |
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142 | if (enableIsInputPending && navigator !== undefined && navigator.scheduling !== undefined && navigator.scheduling.isInputPending !== undefined) {
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143 | var scheduling = navigator.scheduling;
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144 | shouldYieldToHost = function () {
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145 | var currentTime = exports.unstable_now();
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146 | if (currentTime >= frameDeadline) {
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147 |
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148 |
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149 |
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150 |
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151 |
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152 |
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153 |
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154 |
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155 | if (needsPaint || scheduling.isInputPending()) {
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156 |
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157 | return true;
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158 | }
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159 |
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160 |
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161 | return currentTime >= frameDeadline + maxFrameLength;
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162 | } else {
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163 |
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164 | return false;
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165 | }
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166 | };
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167 |
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168 | requestPaint = function () {
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169 | needsPaint = true;
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170 | };
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171 | } else {
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172 |
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173 |
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174 | shouldYieldToHost = function () {
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175 | return exports.unstable_now() >= frameDeadline;
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176 | };
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177 |
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178 |
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179 | requestPaint = function () {};
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180 | }
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181 |
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182 | exports.unstable_forceFrameRate = function (fps) {
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183 | if (fps < 0 || fps > 125) {
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184 | console.error('forceFrameRate takes a positive int between 0 and 125, ' + 'forcing framerates higher than 125 fps is not unsupported');
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185 | return;
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186 | }
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187 | if (fps > 0) {
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188 | frameLength = Math.floor(1000 / fps);
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189 | fpsLocked = true;
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190 | } else {
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191 |
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192 | frameLength = 33.33;
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193 | fpsLocked = false;
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194 | }
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195 | };
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196 |
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197 | var performWorkUntilDeadline = function () {
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198 | if (enableMessageLoopImplementation) {
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199 | if (scheduledHostCallback !== null) {
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200 | var currentTime = exports.unstable_now();
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201 |
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202 |
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203 |
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204 | frameDeadline = currentTime + frameLength;
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205 | var hasTimeRemaining = true;
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206 | try {
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207 | var hasMoreWork = scheduledHostCallback(hasTimeRemaining, currentTime);
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208 | if (!hasMoreWork) {
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209 | isMessageLoopRunning = false;
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210 | scheduledHostCallback = null;
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211 | } else {
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212 |
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213 |
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214 | port.postMessage(null);
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215 | }
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216 | } catch (error) {
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217 |
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218 |
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219 | port.postMessage(null);
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220 | throw error;
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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 | needsPaint = false;
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226 | } else {
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227 | if (scheduledHostCallback !== null) {
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228 | var _currentTime = exports.unstable_now();
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229 | var _hasTimeRemaining = frameDeadline - _currentTime > 0;
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230 | try {
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231 | var _hasMoreWork = scheduledHostCallback(_hasTimeRemaining, _currentTime);
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232 | if (!_hasMoreWork) {
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233 | scheduledHostCallback = null;
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234 | }
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235 | } catch (error) {
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236 |
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237 |
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238 |
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239 | port.postMessage(null);
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240 | throw error;
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241 | }
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242 | }
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243 |
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244 |
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245 | needsPaint = false;
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246 | }
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247 | };
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248 |
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249 | var channel = new MessageChannel();
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250 | var port = channel.port2;
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251 | channel.port1.onmessage = performWorkUntilDeadline;
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252 |
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253 | var onAnimationFrame = function (rAFTime) {
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254 | if (scheduledHostCallback === null) {
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255 |
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256 | prevRAFTime = -1;
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257 | prevRAFInterval = -1;
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258 | isRAFLoopRunning = false;
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259 | return;
|
260 | }
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261 |
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262 |
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263 |
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264 |
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265 |
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266 |
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267 |
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268 |
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269 |
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270 | isRAFLoopRunning = true;
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271 | requestAnimationFrame(function (nextRAFTime) {
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272 | _clearTimeout(rAFTimeoutID);
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273 | onAnimationFrame(nextRAFTime);
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274 | });
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275 |
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276 |
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277 |
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278 |
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279 | var onTimeout = function () {
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280 | frameDeadline = exports.unstable_now() + frameLength / 2;
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281 | performWorkUntilDeadline();
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282 | rAFTimeoutID = _setTimeout(onTimeout, frameLength * 3);
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283 | };
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284 | rAFTimeoutID = _setTimeout(onTimeout, frameLength * 3);
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285 |
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286 | if (prevRAFTime !== -1 &&
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287 |
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288 |
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289 | rAFTime - prevRAFTime > 0.1) {
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290 | var rAFInterval = rAFTime - prevRAFTime;
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291 | if (!fpsLocked && prevRAFInterval !== -1) {
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292 |
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293 |
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294 |
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295 |
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296 |
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297 |
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298 |
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299 |
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300 |
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301 | if (rAFInterval < frameLength && prevRAFInterval < frameLength) {
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302 | frameLength = rAFInterval < prevRAFInterval ? prevRAFInterval : rAFInterval;
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303 | if (frameLength < 8.33) {
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304 |
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305 |
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306 |
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307 | frameLength = 8.33;
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308 | }
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309 | }
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310 | }
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311 | prevRAFInterval = rAFInterval;
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312 | }
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313 | prevRAFTime = rAFTime;
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314 | frameDeadline = rAFTime + frameLength;
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315 |
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316 |
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317 | port.postMessage(null);
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318 | };
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319 |
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320 | requestHostCallback = function (callback) {
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321 | scheduledHostCallback = callback;
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322 | if (enableMessageLoopImplementation) {
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323 | if (!isMessageLoopRunning) {
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324 | isMessageLoopRunning = true;
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325 | port.postMessage(null);
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326 | }
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327 | } else {
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328 | if (!isRAFLoopRunning) {
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329 |
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330 | isRAFLoopRunning = true;
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331 | requestAnimationFrame(function (rAFTime) {
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332 | if (requestIdleCallbackBeforeFirstFrame$1) {
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333 | cancelIdleCallback(idleCallbackID);
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334 | }
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335 | if (requestTimerEventBeforeFirstFrame) {
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336 | _clearTimeout(idleTimeoutID);
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337 | }
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338 | onAnimationFrame(rAFTime);
|
339 | });
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340 |
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341 |
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342 |
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343 |
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344 |
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345 |
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346 |
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347 |
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348 |
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349 | var idleCallbackID = void 0;
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350 | if (requestIdleCallbackBeforeFirstFrame$1) {
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351 | idleCallbackID = requestIdleCallback(function onIdleCallbackBeforeFirstFrame() {
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352 | if (requestTimerEventBeforeFirstFrame) {
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353 | _clearTimeout(idleTimeoutID);
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354 | }
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355 | frameDeadline = exports.unstable_now() + frameLength;
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356 | performWorkUntilDeadline();
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357 | });
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358 | }
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359 |
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360 |
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361 |
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362 |
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363 |
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364 | var idleTimeoutID = void 0;
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365 | if (requestTimerEventBeforeFirstFrame) {
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366 | idleTimeoutID = _setTimeout(function onTimerEventBeforeFirstFrame() {
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367 | if (requestIdleCallbackBeforeFirstFrame$1) {
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368 | cancelIdleCallback(idleCallbackID);
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369 | }
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370 | frameDeadline = exports.unstable_now() + frameLength;
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371 | performWorkUntilDeadline();
|
372 | }, 0);
|
373 | }
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374 | }
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375 | }
|
376 | };
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377 |
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378 | requestHostTimeout = function (callback, ms) {
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379 | taskTimeoutID = _setTimeout(function () {
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380 | callback(exports.unstable_now());
|
381 | }, ms);
|
382 | };
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383 |
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384 | cancelHostTimeout = function () {
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385 | _clearTimeout(taskTimeoutID);
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386 | taskTimeoutID = -1;
|
387 | };
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388 | }
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389 |
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390 |
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391 |
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392 |
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393 | var ImmediatePriority = 1;
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394 | var UserBlockingPriority = 2;
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395 | var NormalPriority = 3;
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396 | var LowPriority = 4;
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397 | var IdlePriority = 5;
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398 |
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399 |
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400 |
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401 |
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402 | var maxSigned31BitInt = 1073741823;
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403 |
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404 |
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405 | var IMMEDIATE_PRIORITY_TIMEOUT = -1;
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406 |
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407 | var USER_BLOCKING_PRIORITY = 250;
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408 | var NORMAL_PRIORITY_TIMEOUT = 5000;
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409 | var LOW_PRIORITY_TIMEOUT = 10000;
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410 |
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411 | var IDLE_PRIORITY = maxSigned31BitInt;
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412 |
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413 |
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414 | var firstTask = null;
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415 | var firstDelayedTask = null;
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416 |
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417 |
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418 | var isSchedulerPaused = false;
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419 |
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420 | var currentTask = null;
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421 | var currentPriorityLevel = NormalPriority;
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422 |
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423 |
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424 | var isPerformingWork = false;
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425 |
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426 | var isHostCallbackScheduled = false;
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427 | var isHostTimeoutScheduled = false;
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428 |
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429 | function scheduler_flushTaskAtPriority_Immediate(callback, didTimeout) {
|
430 | return callback(didTimeout);
|
431 | }
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432 | function scheduler_flushTaskAtPriority_UserBlocking(callback, didTimeout) {
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433 | return callback(didTimeout);
|
434 | }
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435 | function scheduler_flushTaskAtPriority_Normal(callback, didTimeout) {
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436 | return callback(didTimeout);
|
437 | }
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438 | function scheduler_flushTaskAtPriority_Low(callback, didTimeout) {
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439 | return callback(didTimeout);
|
440 | }
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441 | function scheduler_flushTaskAtPriority_Idle(callback, didTimeout) {
|
442 | return callback(didTimeout);
|
443 | }
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444 |
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445 | function flushTask(task, currentTime) {
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446 |
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447 |
|
448 | var next = task.next;
|
449 | if (next === task) {
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450 |
|
451 | firstTask = null;
|
452 | } else {
|
453 |
|
454 | if (task === firstTask) {
|
455 | firstTask = next;
|
456 | }
|
457 | var previous = task.previous;
|
458 | previous.next = next;
|
459 | next.previous = previous;
|
460 | }
|
461 | task.next = task.previous = null;
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462 |
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463 |
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464 | var callback = task.callback;
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465 | var previousPriorityLevel = currentPriorityLevel;
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466 | var previousTask = currentTask;
|
467 | currentPriorityLevel = task.priorityLevel;
|
468 | currentTask = task;
|
469 | var continuationCallback;
|
470 | try {
|
471 | var didUserCallbackTimeout = task.expirationTime <= currentTime;
|
472 |
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473 |
|
474 | switch (currentPriorityLevel) {
|
475 | case ImmediatePriority:
|
476 | continuationCallback = scheduler_flushTaskAtPriority_Immediate(callback, didUserCallbackTimeout);
|
477 | break;
|
478 | case UserBlockingPriority:
|
479 | continuationCallback = scheduler_flushTaskAtPriority_UserBlocking(callback, didUserCallbackTimeout);
|
480 | break;
|
481 | case NormalPriority:
|
482 | continuationCallback = scheduler_flushTaskAtPriority_Normal(callback, didUserCallbackTimeout);
|
483 | break;
|
484 | case LowPriority:
|
485 | continuationCallback = scheduler_flushTaskAtPriority_Low(callback, didUserCallbackTimeout);
|
486 | break;
|
487 | case IdlePriority:
|
488 | continuationCallback = scheduler_flushTaskAtPriority_Idle(callback, didUserCallbackTimeout);
|
489 | break;
|
490 | }
|
491 | } catch (error) {
|
492 | throw error;
|
493 | } finally {
|
494 | currentPriorityLevel = previousPriorityLevel;
|
495 | currentTask = previousTask;
|
496 | }
|
497 |
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498 |
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499 |
|
500 | if (typeof continuationCallback === 'function') {
|
501 | var expirationTime = task.expirationTime;
|
502 | var continuationTask = task;
|
503 | continuationTask.callback = continuationCallback;
|
504 |
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505 |
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506 |
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507 |
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508 |
|
509 | if (firstTask === null) {
|
510 |
|
511 | firstTask = continuationTask.next = continuationTask.previous = continuationTask;
|
512 | } else {
|
513 | var nextAfterContinuation = null;
|
514 | var t = firstTask;
|
515 | do {
|
516 | if (expirationTime <= t.expirationTime) {
|
517 |
|
518 |
|
519 | nextAfterContinuation = t;
|
520 | break;
|
521 | }
|
522 | t = t.next;
|
523 | } while (t !== firstTask);
|
524 | if (nextAfterContinuation === null) {
|
525 |
|
526 |
|
527 | nextAfterContinuation = firstTask;
|
528 | } else if (nextAfterContinuation === firstTask) {
|
529 |
|
530 | firstTask = continuationTask;
|
531 | }
|
532 |
|
533 | var _previous = nextAfterContinuation.previous;
|
534 | _previous.next = nextAfterContinuation.previous = continuationTask;
|
535 | continuationTask.next = nextAfterContinuation;
|
536 | continuationTask.previous = _previous;
|
537 | }
|
538 | }
|
539 | }
|
540 |
|
541 | function advanceTimers(currentTime) {
|
542 |
|
543 | if (firstDelayedTask !== null && firstDelayedTask.startTime <= currentTime) {
|
544 | do {
|
545 | var task = firstDelayedTask;
|
546 | var next = task.next;
|
547 | if (task === next) {
|
548 | firstDelayedTask = null;
|
549 | } else {
|
550 | firstDelayedTask = next;
|
551 | var previous = task.previous;
|
552 | previous.next = next;
|
553 | next.previous = previous;
|
554 | }
|
555 | task.next = task.previous = null;
|
556 | insertScheduledTask(task, task.expirationTime);
|
557 | } while (firstDelayedTask !== null && firstDelayedTask.startTime <= currentTime);
|
558 | }
|
559 | }
|
560 |
|
561 | function handleTimeout(currentTime) {
|
562 | isHostTimeoutScheduled = false;
|
563 | advanceTimers(currentTime);
|
564 |
|
565 | if (!isHostCallbackScheduled) {
|
566 | if (firstTask !== null) {
|
567 | isHostCallbackScheduled = true;
|
568 | requestHostCallback(flushWork);
|
569 | } else if (firstDelayedTask !== null) {
|
570 | requestHostTimeout(handleTimeout, firstDelayedTask.startTime - currentTime);
|
571 | }
|
572 | }
|
573 | }
|
574 |
|
575 | function flushWork(hasTimeRemaining, initialTime) {
|
576 |
|
577 | if (enableSchedulerDebugging && isSchedulerPaused) {
|
578 | return;
|
579 | }
|
580 |
|
581 |
|
582 | isHostCallbackScheduled = false;
|
583 | if (isHostTimeoutScheduled) {
|
584 |
|
585 | isHostTimeoutScheduled = false;
|
586 | cancelHostTimeout();
|
587 | }
|
588 |
|
589 | var currentTime = initialTime;
|
590 | advanceTimers(currentTime);
|
591 |
|
592 | isPerformingWork = true;
|
593 | try {
|
594 | if (!hasTimeRemaining) {
|
595 |
|
596 |
|
597 |
|
598 | while (firstTask !== null && firstTask.expirationTime <= currentTime && !(enableSchedulerDebugging && isSchedulerPaused)) {
|
599 | flushTask(firstTask, currentTime);
|
600 | currentTime = exports.unstable_now();
|
601 | advanceTimers(currentTime);
|
602 | }
|
603 | } else {
|
604 |
|
605 | if (firstTask !== null) {
|
606 | do {
|
607 | flushTask(firstTask, currentTime);
|
608 | currentTime = exports.unstable_now();
|
609 | advanceTimers(currentTime);
|
610 | } while (firstTask !== null && !shouldYieldToHost() && !(enableSchedulerDebugging && isSchedulerPaused));
|
611 | }
|
612 | }
|
613 |
|
614 | if (firstTask !== null) {
|
615 | return true;
|
616 | } else {
|
617 | if (firstDelayedTask !== null) {
|
618 | requestHostTimeout(handleTimeout, firstDelayedTask.startTime - currentTime);
|
619 | }
|
620 | return false;
|
621 | }
|
622 | } finally {
|
623 | isPerformingWork = false;
|
624 | }
|
625 | }
|
626 |
|
627 | function unstable_runWithPriority(priorityLevel, eventHandler) {
|
628 | switch (priorityLevel) {
|
629 | case ImmediatePriority:
|
630 | case UserBlockingPriority:
|
631 | case NormalPriority:
|
632 | case LowPriority:
|
633 | case IdlePriority:
|
634 | break;
|
635 | default:
|
636 | priorityLevel = NormalPriority;
|
637 | }
|
638 |
|
639 | var previousPriorityLevel = currentPriorityLevel;
|
640 | currentPriorityLevel = priorityLevel;
|
641 |
|
642 | try {
|
643 | return eventHandler();
|
644 | } finally {
|
645 | currentPriorityLevel = previousPriorityLevel;
|
646 | }
|
647 | }
|
648 |
|
649 | function unstable_next(eventHandler) {
|
650 | var priorityLevel;
|
651 | switch (currentPriorityLevel) {
|
652 | case ImmediatePriority:
|
653 | case UserBlockingPriority:
|
654 | case NormalPriority:
|
655 |
|
656 | priorityLevel = NormalPriority;
|
657 | break;
|
658 | default:
|
659 |
|
660 | priorityLevel = currentPriorityLevel;
|
661 | break;
|
662 | }
|
663 |
|
664 | var previousPriorityLevel = currentPriorityLevel;
|
665 | currentPriorityLevel = priorityLevel;
|
666 |
|
667 | try {
|
668 | return eventHandler();
|
669 | } finally {
|
670 | currentPriorityLevel = previousPriorityLevel;
|
671 | }
|
672 | }
|
673 |
|
674 | function unstable_wrapCallback(callback) {
|
675 | var parentPriorityLevel = currentPriorityLevel;
|
676 | return function () {
|
677 |
|
678 | var previousPriorityLevel = currentPriorityLevel;
|
679 | currentPriorityLevel = parentPriorityLevel;
|
680 |
|
681 | try {
|
682 | return callback.apply(this, arguments);
|
683 | } finally {
|
684 | currentPriorityLevel = previousPriorityLevel;
|
685 | }
|
686 | };
|
687 | }
|
688 |
|
689 | function timeoutForPriorityLevel(priorityLevel) {
|
690 | switch (priorityLevel) {
|
691 | case ImmediatePriority:
|
692 | return IMMEDIATE_PRIORITY_TIMEOUT;
|
693 | case UserBlockingPriority:
|
694 | return USER_BLOCKING_PRIORITY;
|
695 | case IdlePriority:
|
696 | return IDLE_PRIORITY;
|
697 | case LowPriority:
|
698 | return LOW_PRIORITY_TIMEOUT;
|
699 | case NormalPriority:
|
700 | default:
|
701 | return NORMAL_PRIORITY_TIMEOUT;
|
702 | }
|
703 | }
|
704 |
|
705 | function unstable_scheduleCallback(priorityLevel, callback, options) {
|
706 | var currentTime = exports.unstable_now();
|
707 |
|
708 | var startTime;
|
709 | var timeout;
|
710 | if (typeof options === 'object' && options !== null) {
|
711 | var delay = options.delay;
|
712 | if (typeof delay === 'number' && delay > 0) {
|
713 | startTime = currentTime + delay;
|
714 | } else {
|
715 | startTime = currentTime;
|
716 | }
|
717 | timeout = typeof options.timeout === 'number' ? options.timeout : timeoutForPriorityLevel(priorityLevel);
|
718 | } else {
|
719 | timeout = timeoutForPriorityLevel(priorityLevel);
|
720 | startTime = currentTime;
|
721 | }
|
722 |
|
723 | var expirationTime = startTime + timeout;
|
724 |
|
725 | var newTask = {
|
726 | callback: callback,
|
727 | priorityLevel: priorityLevel,
|
728 | startTime: startTime,
|
729 | expirationTime: expirationTime,
|
730 | next: null,
|
731 | previous: null
|
732 | };
|
733 |
|
734 | if (startTime > currentTime) {
|
735 |
|
736 | insertDelayedTask(newTask, startTime);
|
737 | if (firstTask === null && firstDelayedTask === newTask) {
|
738 |
|
739 | if (isHostTimeoutScheduled) {
|
740 |
|
741 | cancelHostTimeout();
|
742 | } else {
|
743 | isHostTimeoutScheduled = true;
|
744 | }
|
745 |
|
746 | requestHostTimeout(handleTimeout, startTime - currentTime);
|
747 | }
|
748 | } else {
|
749 | insertScheduledTask(newTask, expirationTime);
|
750 |
|
751 |
|
752 | if (!isHostCallbackScheduled && !isPerformingWork) {
|
753 | isHostCallbackScheduled = true;
|
754 | requestHostCallback(flushWork);
|
755 | }
|
756 | }
|
757 |
|
758 | return newTask;
|
759 | }
|
760 |
|
761 | function insertScheduledTask(newTask, expirationTime) {
|
762 |
|
763 |
|
764 |
|
765 | if (firstTask === null) {
|
766 |
|
767 | firstTask = newTask.next = newTask.previous = newTask;
|
768 | } else {
|
769 | var next = null;
|
770 | var task = firstTask;
|
771 | do {
|
772 | if (expirationTime < task.expirationTime) {
|
773 |
|
774 | next = task;
|
775 | break;
|
776 | }
|
777 | task = task.next;
|
778 | } while (task !== firstTask);
|
779 |
|
780 | if (next === null) {
|
781 |
|
782 |
|
783 | next = firstTask;
|
784 | } else if (next === firstTask) {
|
785 |
|
786 | firstTask = newTask;
|
787 | }
|
788 |
|
789 | var previous = next.previous;
|
790 | previous.next = next.previous = newTask;
|
791 | newTask.next = next;
|
792 | newTask.previous = previous;
|
793 | }
|
794 | }
|
795 |
|
796 | function insertDelayedTask(newTask, startTime) {
|
797 |
|
798 | if (firstDelayedTask === null) {
|
799 |
|
800 | firstDelayedTask = newTask.next = newTask.previous = newTask;
|
801 | } else {
|
802 | var next = null;
|
803 | var task = firstDelayedTask;
|
804 | do {
|
805 | if (startTime < task.startTime) {
|
806 |
|
807 | next = task;
|
808 | break;
|
809 | }
|
810 | task = task.next;
|
811 | } while (task !== firstDelayedTask);
|
812 |
|
813 | if (next === null) {
|
814 |
|
815 |
|
816 | next = firstDelayedTask;
|
817 | } else if (next === firstDelayedTask) {
|
818 |
|
819 | firstDelayedTask = newTask;
|
820 | }
|
821 |
|
822 | var previous = next.previous;
|
823 | previous.next = next.previous = newTask;
|
824 | newTask.next = next;
|
825 | newTask.previous = previous;
|
826 | }
|
827 | }
|
828 |
|
829 | function unstable_pauseExecution() {
|
830 | isSchedulerPaused = true;
|
831 | }
|
832 |
|
833 | function unstable_continueExecution() {
|
834 | isSchedulerPaused = false;
|
835 | if (!isHostCallbackScheduled && !isPerformingWork) {
|
836 | isHostCallbackScheduled = true;
|
837 | requestHostCallback(flushWork);
|
838 | }
|
839 | }
|
840 |
|
841 | function unstable_getFirstCallbackNode() {
|
842 | return firstTask;
|
843 | }
|
844 |
|
845 | function unstable_cancelCallback(task) {
|
846 | var next = task.next;
|
847 | if (next === null) {
|
848 |
|
849 | return;
|
850 | }
|
851 |
|
852 | if (task === next) {
|
853 | if (task === firstTask) {
|
854 | firstTask = null;
|
855 | } else if (task === firstDelayedTask) {
|
856 | firstDelayedTask = null;
|
857 | }
|
858 | } else {
|
859 | if (task === firstTask) {
|
860 | firstTask = next;
|
861 | } else if (task === firstDelayedTask) {
|
862 | firstDelayedTask = next;
|
863 | }
|
864 | var previous = task.previous;
|
865 | previous.next = next;
|
866 | next.previous = previous;
|
867 | }
|
868 |
|
869 | task.next = task.previous = null;
|
870 | }
|
871 |
|
872 | function unstable_getCurrentPriorityLevel() {
|
873 | return currentPriorityLevel;
|
874 | }
|
875 |
|
876 | function unstable_shouldYield() {
|
877 | var currentTime = exports.unstable_now();
|
878 | advanceTimers(currentTime);
|
879 | return currentTask !== null && firstTask !== null && firstTask.startTime <= currentTime && firstTask.expirationTime < currentTask.expirationTime || shouldYieldToHost();
|
880 | }
|
881 |
|
882 | var unstable_requestPaint = requestPaint;
|
883 |
|
884 | exports.unstable_ImmediatePriority = ImmediatePriority;
|
885 | exports.unstable_UserBlockingPriority = UserBlockingPriority;
|
886 | exports.unstable_NormalPriority = NormalPriority;
|
887 | exports.unstable_IdlePriority = IdlePriority;
|
888 | exports.unstable_LowPriority = LowPriority;
|
889 | exports.unstable_runWithPriority = unstable_runWithPriority;
|
890 | exports.unstable_next = unstable_next;
|
891 | exports.unstable_scheduleCallback = unstable_scheduleCallback;
|
892 | exports.unstable_cancelCallback = unstable_cancelCallback;
|
893 | exports.unstable_wrapCallback = unstable_wrapCallback;
|
894 | exports.unstable_getCurrentPriorityLevel = unstable_getCurrentPriorityLevel;
|
895 | exports.unstable_shouldYield = unstable_shouldYield;
|
896 | exports.unstable_requestPaint = unstable_requestPaint;
|
897 | exports.unstable_continueExecution = unstable_continueExecution;
|
898 | exports.unstable_pauseExecution = unstable_pauseExecution;
|
899 | exports.unstable_getFirstCallbackNode = unstable_getFirstCallbackNode;
|
900 | })();
|
901 | }
|