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comparison: toolkit/modules/WindowsRegistry.jsm
toolkit/modules/WindowsRegistry.jsm
- changeset 0
- 6474c204b198
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| -1:000000000000 | 0:7dc1f3ea479c |
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| 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 const {classes: Cc, interfaces: Ci, utils: Cu, results: Cr} = Components; | |
| 7 | |
| 8 this.EXPORTED_SYMBOLS = ["WindowsRegistry"]; | |
| 9 | |
| 10 const WindowsRegistry = { | |
| 11 /** | |
| 12 * Safely reads a value from the registry. | |
| 13 * | |
| 14 * @param aRoot | |
| 15 * The root registry to use. | |
| 16 * @param aPath | |
| 17 * The registry path to the key. | |
| 18 * @param aKey | |
| 19 * The key name. | |
| 20 * @return The key value or undefined if it doesn't exist. If the key is | |
| 21 * a REG_MULTI_SZ, an array is returned. | |
| 22 */ | |
| 23 readRegKey: function(aRoot, aPath, aKey) { | |
| 24 const kRegMultiSz = 7; | |
| 25 let registry = Cc["@mozilla.org/windows-registry-key;1"]. | |
| 26 createInstance(Ci.nsIWindowsRegKey); | |
| 27 try { | |
| 28 registry.open(aRoot, aPath, Ci.nsIWindowsRegKey.ACCESS_READ); | |
| 29 if (registry.hasValue(aKey)) { | |
| 30 let type = registry.getValueType(aKey); | |
| 31 switch (type) { | |
| 32 case kRegMultiSz: | |
| 33 // nsIWindowsRegKey doesn't support REG_MULTI_SZ type out of the box. | |
| 34 let str = registry.readStringValue(aKey); | |
| 35 return [v for each (v in str.split("\0")) if (v)]; | |
| 36 case Ci.nsIWindowsRegKey.TYPE_STRING: | |
| 37 return registry.readStringValue(aKey); | |
| 38 case Ci.nsIWindowsRegKey.TYPE_INT: | |
| 39 return registry.readIntValue(aKey); | |
| 40 default: | |
| 41 throw new Error("Unsupported registry value."); | |
| 42 } | |
| 43 } | |
| 44 } catch (ex) { | |
| 45 } finally { | |
| 46 registry.close(); | |
| 47 } | |
| 48 return undefined; | |
| 49 }, | |
| 50 }; |
