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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
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 LOGGER_FILE_PERM = parseInt("666", 8);
const NS_PREFBRANCH_PREFCHANGE_TOPIC_ID = "nsPref:changed";
Components.utils.import("resource://gre/modules/FileUtils.jsm");
Components.utils.import("resource://gre/modules/Services.jsm");
this.EXPORTED_SYMBOLS = [ "LogManager" ];
var gDebugLogEnabled = false;
function formatLogMessage(aType, aName, aStr, aException) {
let message = aType.toUpperCase() + " " + aName + ": " + aStr;
if (aException) {
if (typeof aException == "number")
return message + ": " + Components.Exception("", aException).name;
message = message + ": " + aException;
// instanceOf doesn't work here, let's duck type
if (aException.fileName)
message = message + " (" + aException.fileName + ":" + aException.lineNumber + ")";
if (aException.message == "too much recursion")
dump(message + "\n" + aException.stack + "\n");
}
return message;
}
function getStackDetails(aException) {
// Defensively wrap all this to ensure that failing to get the message source
// doesn't stop the message from being logged
try {
if (aException) {
if (aException instanceof Ci.nsIException) {
return {
sourceName: aException.filename,
lineNumber: aException.lineNumber
};
}
if (typeof aException == "object") {
return {
sourceName: aException.fileName,
lineNumber: aException.lineNumber
};
}
}
let stackFrame = Components.stack.caller.caller.caller;
return {
sourceName: stackFrame.filename,
lineNumber: stackFrame.lineNumber
};
}
catch (e) {
return {
sourceName: null,
lineNumber: 0
};
}
}
function AddonLogger(aName) {
this.name = aName;
}
AddonLogger.prototype = {
name: null,
error: function AddonLogger_error(aStr, aException) {
let message = formatLogMessage("error", this.name, aStr, aException);
let stack = getStackDetails(aException);
let consoleMessage = Cc["@mozilla.org/scripterror;1"].
createInstance(Ci.nsIScriptError);
consoleMessage.init(message, stack.sourceName, null, stack.lineNumber, 0,
Ci.nsIScriptError.errorFlag, "component javascript");
Services.console.logMessage(consoleMessage);
// Always dump errors, in case the Console Service isn't listening yet
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, LOGGER_FILE_PERM, 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 + " at " + stack.sourceName + ":" +
stack.lineNumber + "\n");
writer.close();
}
catch (e) { }
},
warn: function AddonLogger_warn(aStr, aException) {
let message = formatLogMessage("warn", this.name, aStr, aException);
let stack = getStackDetails(aException);
let consoleMessage = Cc["@mozilla.org/scripterror;1"].
createInstance(Ci.nsIScriptError);
consoleMessage.init(message, stack.sourceName, null, stack.lineNumber, 0,
Ci.nsIScriptError.warningFlag, "component javascript");
Services.console.logMessage(consoleMessage);
if (gDebugLogEnabled)
dump("*** " + message + "\n");
},
log: function AddonLogger_log(aStr, aException) {
if (gDebugLogEnabled) {
let message = formatLogMessage("log", this.name, aStr, aException);
dump("*** " + message + "\n");
Services.console.logStringMessage(message);
}
}
};
this.LogManager = {
getLogger: function LogManager_getLogger(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 LogManager_targetName(aStr, aException) {
logger[name](aStr, aException);
};
});
}
return logger;
}
};
var PrefObserver = {
init: function PrefObserver_init() {
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 PrefObserver_observe(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();
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