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feat: add performance polyfill
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@seavan
seavan committed Jun 22, 2018
1 parent 95749c4 commit 85498b7
Showing 1 changed file with 149 additions and 47 deletions.
196 changes: 149 additions & 47 deletions shim.js
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Original file line number Diff line number Diff line change
Expand Up @@ -2,24 +2,24 @@
if (typeof __dirname === 'undefined') global.__dirname = '/'
if (typeof __filename === 'undefined') global.__filename = ''
if (typeof process === 'undefined') {
global.process = require('process');
global.process = require('process');
} else {
var bProcess = require('process');
for (var p in bProcess) {
if (!(p in process)) {
process[p] = bProcess[p];
}
}
var bProcess = require('process');
for (var p in bProcess) {
if (!(p in process)) {
process[p] = bProcess[p];
}
}
}

process.browser = false;
if (typeof Buffer === 'undefined') global.Buffer = require('buffer').Buffer;

// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.join
if (!Uint8Array.prototype.join) {
Object.defineProperty(Uint8Array.prototype, 'join', {
value: Array.prototype.join
});
Object.defineProperty(Uint8Array.prototype, 'join', {
value: Array.prototype.join
});
}

// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.fill
Expand All @@ -32,22 +32,22 @@ var isDev = typeof __DEV__ === 'boolean' && __DEV__;
const env = process.env;
env.NODE_ENV = isDev ? 'development' : 'production';
if (typeof localStorage !== 'undefined') {
localStorage.debug = isDev ? '*' : '';
localStorage.debug = isDev ? '*' : '';
}

const rnWebSocket = global.WebSocket;
global.WebSocket = function(url) {
// enforce TLS pinning for our main server
const options = url.startsWith('wss://') ? {
// for ios, name of asset containing verified cert
pinSSLCert: 'maincert.com',
// for Android, sha256 hash of verified cert
pinSSLHost: url.match(/\/\/(.*?)\//)[1],
pinSSLCertHash: 'sha256/hOTzKrLdAWvqPQuVV2lYC61JxrXUYyTudUmMhppBkVk='
} : null;
const r = new rnWebSocket(url, null, null, options);
r.binaryType = 'blob';
return r;
global.WebSocket = function (url) {
// enforce TLS pinning for our main server
const options = url.startsWith('wss://') ? {
// for ios, name of asset containing verified cert
pinSSLCert: 'maincert.com',
// for Android, sha256 hash of verified cert
pinSSLHost: url.match(/\/\/(.*?)\//)[1],
pinSSLCertHash: 'sha256/hOTzKrLdAWvqPQuVV2lYC61JxrXUYyTudUmMhppBkVk='
} : null;
const r = new rnWebSocket(url, null, null, options);
r.binaryType = 'blob';
return r;
};

const { randomBytes } = require('react-native-randombytes');
Expand All @@ -67,18 +67,18 @@ nacl.setPRNG((x, n) => {
// console.log('shim.js: ', global.originalWebSocket);
/*! https://mths.be/codepointat v0.2.0 by @mathias */
if (!String.prototype.codePointAt) {
(function() {
(function () {
'use strict'; // needed to support `apply`/`call` with `undefined`/`null`
var defineProperty = (function() {
var defineProperty = (function () {
// IE 8 only supports `Object.defineProperty` on DOM elements
try {
var object = {};
var $defineProperty = Object.defineProperty;
var result = $defineProperty(object, object, object) && $defineProperty;
} catch(error) {}
} catch (error) { }
return result;
}());
var codePointAt = function(position) {
var codePointAt = function (position) {
if (this == null) {
throw TypeError();
}
Expand Down Expand Up @@ -122,19 +122,19 @@ if (!String.prototype.codePointAt) {

/*! https://mths.be/fromcodepoint v0.2.1 by @mathias */
if (!String.fromCodePoint) {
(function() {
var defineProperty = (function() {
(function () {
var defineProperty = (function () {
// IE 8 only supports `Object.defineProperty` on DOM elements
try {
var object = {};
var $defineProperty = Object.defineProperty;
var result = $defineProperty(object, object, object) && $defineProperty;
} catch(error) {}
} catch (error) { }
return result;
}());
var stringFromCharCode = String.fromCharCode;
var floor = Math.floor;
var fromCodePoint = function(_) {
var fromCodePoint = function (_) {
var MAX_SIZE = 0x4000;
var codeUnits = [];
var highSurrogate;
Expand Down Expand Up @@ -190,20 +190,122 @@ if (!Array.prototype.random) {
}

// Implement console.time and console.timeEnd if one of them is missing
if (!console["time"] || !console["timeEnd"])
{
var timers = {};
console["time"] = function(id)
{
timers[id] = new Date().getTime();
};
console["timeEnd"] = function(id)
{
var start = timers[id];
if (start)
{
console.log(id + ": " + (new Date().getTime() - start) + "ms");
delete timers[id];
}
};
if (!console["time"] || !console["timeEnd"]) {
var timers = {};
console["time"] = function (id) {
timers[id] = new Date().getTime();
};
console["timeEnd"] = function (id) {
var start = timers[id];
if (start) {
console.log(id + ": " + (new Date().getTime() - start) + "ms");
delete timers[id];
}
};
}

/**
* User Timing polyfill (http://www.w3.org/TR/user-timing/)
* @author RubaXa <trash@rubaxa.org>
*/
(function (scope) {
var
startOffset = Date.now ? Date.now() : +(new Date)
, performance = scope.performance || {}

, _entries = []
, _marksIndex = {}

, _filterEntries = function (key, value) {
var i = 0, n = _entries.length, result = [];
for (; i < n; i++) {
if (_entries[i][key] == value) {
result.push(_entries[i]);
}
}
return result;
}

, _clearEntries = function (type, name) {
var i = _entries.length, entry;
while (i--) {
entry = _entries[i];
if (entry.entryType == type && (name === void 0 || entry.name == name)) {
_entries.splice(i, 1);
}
}
}
;


if (!performance.now) {
performance.now = performance.webkitNow || performance.mozNow || performance.msNow || function () {
return (Date.now ? Date.now() : +(new Date)) - startOffset;
};
}


if (!performance.mark) {
performance.mark = performance.webkitMark || function (name) {
var mark = {
name: name
, entryType: 'mark'
, startTime: performance.now()
, duration: 0
};
_entries.push(mark);
_marksIndex[name] = mark;
};
}


if (!performance.measure) {
performance.measure = performance.webkitMeasure || function (name, startMark, endMark) {
startMark = _marksIndex[startMark].startTime;
endMark = _marksIndex[endMark].startTime;

_entries.push({
name: name
, entryType: 'measure'
, startTime: startMark
, duration: endMark - startMark
});
};
}


if (!performance.getEntriesByType) {
performance.getEntriesByType = performance.webkitGetEntriesByType || function (type) {
return _filterEntries('entryType', type);
};
}


if (!performance.getEntriesByName) {
performance.getEntriesByName = performance.webkitGetEntriesByName || function (name) {
return _filterEntries('name', name);
};
}


if (!performance.clearMarks) {
performance.clearMarks = performance.webkitClearMarks || function (name) {
_clearEntries('mark', name);
};
}


if (!performance.clearMeasures) {
performance.clearMeasures = performance.webkitClearMeasures || function (name) {
_clearEntries('measure', name);
};
}


// exports
scope.performance = performance;

if (typeof define === 'function' && (define.amd || define.ajs)) {
define('performance', [], function () { return performance });
}
})(global);

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