The Tor Browser / file comparison
comparison: toolkit/identity/LogUtils.jsm
toolkit/identity/LogUtils.jsm
- changeset 0
- 6474c204b198
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| -1:000000000000 | 0:236c026f5af6 |
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| 1 /* -*- Mode: js2; js2-basic-offset: 2; indent-tabs-mode: nil; -*- */ | |
| 2 /* vim: set ft=javascript ts=2 et sw=2 tw=80: */ | |
| 3 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this file, | |
| 5 * You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 "use strict"; | |
| 8 | |
| 9 this.EXPORTED_SYMBOLS = ["Logger"]; | |
| 10 const PREF_DEBUG = "toolkit.identity.debug"; | |
| 11 | |
| 12 const Cu = Components.utils; | |
| 13 const Ci = Components.interfaces; | |
| 14 const Cc = Components.classes; | |
| 15 const Cr = Components.results; | |
| 16 | |
| 17 Cu.import("resource://gre/modules/XPCOMUtils.jsm"); | |
| 18 Cu.import("resource://gre/modules/Services.jsm"); | |
| 19 | |
| 20 function IdentityLogger() { | |
| 21 Services.prefs.addObserver(PREF_DEBUG, this, false); | |
| 22 this._debug = Services.prefs.getBoolPref(PREF_DEBUG); | |
| 23 return this; | |
| 24 } | |
| 25 | |
| 26 IdentityLogger.prototype = { | |
| 27 QueryInterface: XPCOMUtils.generateQI([Ci.nsISupports, Ci.nsIObserver]), | |
| 28 | |
| 29 observe: function observe(aSubject, aTopic, aData) { | |
| 30 switch(aTopic) { | |
| 31 case "nsPref:changed": | |
| 32 this._debug = Services.prefs.getBoolPref(PREF_DEBUG); | |
| 33 break; | |
| 34 | |
| 35 case "quit-application-granted": | |
| 36 Services.prefs.removeObserver(PREF_DEBUG, this); | |
| 37 break; | |
| 38 | |
| 39 default: | |
| 40 this.log("Logger observer", "Unknown topic:", aTopic); | |
| 41 break; | |
| 42 } | |
| 43 }, | |
| 44 | |
| 45 _generateLogMessage: function _generateLogMessage(aPrefix, args) { | |
| 46 // create a string representation of a list of arbitrary things | |
| 47 let strings = []; | |
| 48 | |
| 49 // XXX bug 770418 - args look like flattened array, not list of strings | |
| 50 | |
| 51 args.forEach(function(arg) { | |
| 52 if (typeof arg === 'string') { | |
| 53 strings.push(arg); | |
| 54 } else if (typeof arg === 'undefined') { | |
| 55 strings.push('undefined'); | |
| 56 } else if (arg === null) { | |
| 57 strings.push('null'); | |
| 58 } else { | |
| 59 try { | |
| 60 strings.push(JSON.stringify(arg, null, 2)); | |
| 61 } catch(err) { | |
| 62 strings.push("<<something>>"); | |
| 63 } | |
| 64 } | |
| 65 }); | |
| 66 return 'Identity ' + aPrefix + ': ' + strings.join(' '); | |
| 67 }, | |
| 68 | |
| 69 /** | |
| 70 * log() - utility function to print a list of arbitrary things | |
| 71 * | |
| 72 * Enable with about:config pref toolkit.identity.debug | |
| 73 */ | |
| 74 log: function log(aPrefix, ...args) { | |
| 75 if (!this._debug) { | |
| 76 return; | |
| 77 } | |
| 78 let output = this._generateLogMessage(aPrefix, args); | |
| 79 dump(output + "\n"); | |
| 80 | |
| 81 // Additionally, make the output visible in the Error Console | |
| 82 Services.console.logStringMessage(output); | |
| 83 }, | |
| 84 | |
| 85 /** | |
| 86 * reportError() - report an error through component utils as well as | |
| 87 * our log function | |
| 88 */ | |
| 89 reportError: function reportError(aPrefix, ...aArgs) { | |
| 90 let prefix = aPrefix + ' ERROR'; | |
| 91 | |
| 92 // Report the error in the browser | |
| 93 let output = this._generateLogMessage(aPrefix, aArgs); | |
| 94 Cu.reportError(output); | |
| 95 dump("ERROR: " + output + "\n"); | |
| 96 for (let frame = Components.stack.caller; frame; frame = frame.caller) { | |
| 97 dump(frame + "\n"); | |
| 98 } | |
| 99 } | |
| 100 | |
| 101 }; | |
| 102 | |
| 103 this.Logger = new IdentityLogger(); |
