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