gecko/toolkit/mozapps/extensions/AddonLogging.jsm

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/*
# ***** BEGIN LICENSE BLOCK *****
# Version: MPL 1.1/GPL 2.0/LGPL 2.1
#
# The contents of this file are subject to the Mozilla Public License Version
# 1.1 (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
# http://www.mozilla.org/MPL/
#
# Software distributed under the License is distributed on an "AS IS" basis,
# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
# for the specific language governing rights and limitations under the
# License.
#
# The Original Code is the Extension Manager.
#
# The Initial Developer of the Original Code is
# the Mozilla Foundation.
# Portions created by the Initial Developer are Copyright (C) 2010
# the Initial Developer. All Rights Reserved.
#
# Contributor(s):
# Dave Townsend <dtownsend@oxymoronical.com>
#
# Alternatively, the contents of this file may be used under the terms of
# either the GNU General Public License Version 2 or later (the "GPL"), or
# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
# in which case the provisions of the GPL or the LGPL are applicable instead
# of those above. If you wish to allow use of your version of this file only
# under the terms of either the GPL or the LGPL, and not to allow others to
# use your version of this file under the terms of the MPL, indicate your
# decision by deleting the provisions above and replace them with the notice
# and other provisions required by the GPL or the LGPL. If you do not delete
# the provisions above, a recipient may use your version of this file under
# the terms of any one of the MPL, the GPL or the LGPL.
#
# ***** END LICENSE BLOCK *****
*/
const Cc = Components.classes;
const Ci = Components.interfaces;
const Cr = Components.results;
const KEY_PROFILEDIR = "ProfD";
const FILE_EXTENSIONS_LOG = "extensions.log";
const PREF_LOGGING_ENABLED = "extensions.logging.enabled";
const NS_PREFBRANCH_PREFCHANGE_TOPIC_ID = "nsPref:changed";
Components.utils.import("resource://gre/modules/FileUtils.jsm");
Components.utils.import("resource://gre/modules/Services.jsm");
var EXPORTED_SYMBOLS = [ "LogManager" ];
var gDebugLogEnabled = false;
function formatLogMessage(aType, aName, aStr) {
return aType.toUpperCase() + " " + aName + ": " + aStr;
}
function AddonLogger(aName) {
this.name = aName;
}
AddonLogger.prototype = {
name: null,
error: function(aStr) {
let message = formatLogMessage("error", this.name, aStr);
let consoleMessage = Cc["@mozilla.org/scripterror;1"].
createInstance(Ci.nsIScriptError);
consoleMessage.init(message, null, null, 0, 0, Ci.nsIScriptError.errorFlag,
"component javascript");
Services.console.logMessage(consoleMessage);
if (gDebugLogEnabled)
dump("*** " + message + "\n");
try {
var tstamp = new Date();
var logfile = FileUtils.getFile(KEY_PROFILEDIR, [FILE_EXTENSIONS_LOG]);
var stream = Cc["@mozilla.org/network/file-output-stream;1"].
createInstance(Ci.nsIFileOutputStream);
stream.init(logfile, 0x02 | 0x08 | 0x10, 0666, 0); // write, create, append
var writer = Cc["@mozilla.org/intl/converter-output-stream;1"].
createInstance(Ci.nsIConverterOutputStream);
writer.init(stream, "UTF-8", 0, 0x0000);
writer.writeString(tstamp.toLocaleFormat("%Y-%m-%d %H:%M:%S ") +
message + "\n");
writer.close();
}
catch (e) { }
},
warn: function(aStr) {
let message = formatLogMessage("warn", this.name, aStr);
let consoleMessage = Cc["@mozilla.org/scripterror;1"].
createInstance(Ci.nsIScriptError);
consoleMessage.init(message, null, null, 0, 0, Ci.nsIScriptError.warningFlag,
"component javascript");
Services.console.logMessage(consoleMessage);
if (gDebugLogEnabled)
dump("*** " + message + "\n");
},
log: function(aStr) {
if (gDebugLogEnabled) {
let message = formatLogMessage("log", this.name, aStr);
dump("*** " + message + "\n");
Services.console.logStringMessage(message);
}
}
};
var LogManager = {
getLogger: function(aName, aTarget) {
let logger = new AddonLogger(aName);
if (aTarget) {
["error", "warn", "log"].forEach(function(name) {
let fname = name.toUpperCase();
delete aTarget[fname];
aTarget[fname] = function(aStr) {
logger[name](aStr);
};
});
}
return logger;
}
};
var PrefObserver = {
init: function() {
Services.prefs.addObserver(PREF_LOGGING_ENABLED, this, false);
Services.obs.addObserver(this, "xpcom-shutdown", false);
this.observe(null, NS_PREFBRANCH_PREFCHANGE_TOPIC_ID, PREF_LOGGING_ENABLED);
},
observe: function(aSubject, aTopic, aData) {
if (aTopic == "xpcom-shutdown") {
Services.prefs.removeObserver(PREF_LOGGING_ENABLED, this);
Services.obs.removeObserver(this, "xpcom-shutdown");
}
else if (aTopic == NS_PREFBRANCH_PREFCHANGE_TOPIC_ID) {
try {
gDebugLogEnabled = Services.prefs.getBoolPref(PREF_LOGGING_ENABLED);
}
catch (e) {
gDebugLogEnabled = false;
}
}
}
};
PrefObserver.init();