The Tor Browser / file comparison
comparison: addon-sdk/source/lib/sdk/system/environment.js
addon-sdk/source/lib/sdk/system/environment.js
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
equal
deleted
inserted
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| -1:000000000000 | 0:2a463be344be |
|---|---|
| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 'use strict'; | |
| 6 | |
| 7 module.metadata = { | |
| 8 "stability": "stable" | |
| 9 }; | |
| 10 | |
| 11 const { Cc, Ci } = require('chrome'); | |
| 12 const { get, set, exists } = Cc['@mozilla.org/process/environment;1']. | |
| 13 getService(Ci.nsIEnvironment); | |
| 14 | |
| 15 exports.env = Proxy.create({ | |
| 16 // XPCOM does not provides a way to enumerate environment variables, so we | |
| 17 // just don't support enumeration. | |
| 18 getPropertyNames: function() [], | |
| 19 getOwnPropertyNames: function() [], | |
| 20 enumerate: function() [], | |
| 21 keys: function() [], | |
| 22 // We do not support freezing, cause it would make it impossible to set new | |
| 23 // environment variables. | |
| 24 fix: function() undefined, | |
| 25 // We present all environment variables as own properties of this object, | |
| 26 // so we just delegate this call to `getOwnPropertyDescriptor`. | |
| 27 getPropertyDescriptor: function(name) this.getOwnPropertyDescriptor(name), | |
| 28 // If environment variable with this name is defined, we generate proprety | |
| 29 // descriptor for it, otherwise fall back to `undefined` so that for consumer | |
| 30 // this property does not exists. | |
| 31 getOwnPropertyDescriptor: function(name) { | |
| 32 return !exists(name) ? undefined : { | |
| 33 value: get(name), | |
| 34 enumerable: false, // Non-enumerable as we don't support enumeration. | |
| 35 configurable: true, // Configurable as it may be deleted. | |
| 36 writable: true // Writable as we do support set. | |
| 37 } | |
| 38 }, | |
| 39 | |
| 40 // New environment variables can be defined just by defining properties | |
| 41 // on this object. | |
| 42 defineProperty: function(name, { value }) set(name, value), | |
| 43 delete: function(name) { | |
| 44 set(name, null); | |
| 45 return true; | |
| 46 }, | |
| 47 | |
| 48 // We present all properties as own, there for we just delegate to `hasOwn`. | |
| 49 has: function(name) this.hasOwn(name), | |
| 50 // We do support checks for existence of an environment variable, via `in` | |
| 51 // operator on this object. | |
| 52 hasOwn: function(name) exists(name), | |
| 53 | |
| 54 // On property get / set we do read / write appropriate environment variables, | |
| 55 // please note though, that variables with names of standard object properties | |
| 56 // intentionally (so that this behaves as normal object) can not be | |
| 57 // read / set. | |
| 58 get: function(proxy, name) Object.prototype[name] || get(name) || undefined, | |
| 59 set: function(proxy, name, value) Object.prototype[name] || set(name, value) | |
| 60 }); |
