1 /**

     2  * Copyright (c) 2009-2010 Symbian Foundation and/or its subsidiary(-ies).

     3  * All rights reserved.

     4  * This component and the accompanying materials are made available

     5  * under the terms of the License "Eclipse Public License v1.0"

     6  * which accompanies this distribution, and is available

     7  * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8  *

     9  * Initial Contributors:

    10  * Nokia Corporation - initial contribution.

    11  * 

    12  * Contributors:

    13  * 

    14  * Description:

    15  * 

    16  */

    17 

    18 ///////////////////////////////////////////////////////////////////////////////

    19 // Logger utility class that uses the Firebug console class.

    20 

    21 // Constructor (everything is static so this is empty).

    22 function Logger() {

    23     // Set default logger level.

    24     this.level = this.LOG_LEVEL_OFF;

    25 }

    26 

    27 // Logger levels.

    28 Logger.prototype.LOG_LEVEL_DEBUG = 0;

    29 Logger.prototype.LOG_LEVEL_INFO = 1;

    30 Logger.prototype.LOG_LEVEL_WARN = 2;

    31 Logger.prototype.LOG_LEVEL_ERROR = 3;

    32 Logger.prototype.LOG_LEVEL_OFF = 4;

    33 

    34 Logger.prototype.level = null;

    35 Logger.prototype.filter = null;

    36 

    37 // Disable logging on other browsers except Firefox.

    38 Logger.prototype.enabled = (navigator.userAgent.indexOf("Firefox") != -1);

    39 

    40 // Dumps an objects properties and methods to the console.

    41 Logger.prototype.dump = function(obj) {

    42     if (this.enabled) {

    43         console.dir(obj);

    44     }

    45 };

    46 

    47 // Dumps a stracktrace to the console.

    48 Logger.prototype.trace = function() {

    49     if (this.enabled) {

    50         console.trace();

    51     }

    52 };

    53 

    54 // Prints a debug message to the console.

    55 Logger.prototype.debug = function(str) {

    56     if (this.enabled && this.level <= this.LOG_LEVEL_DEBUG) {

    57         if (this.filter == null) {

    58             console.debug(str);

    59         } else {

    60             var show = false;

    61             for (i in this.filter) {

    62                 if (str.indexOf(this.filter[i]) >= 0) {

    63                     show = true;

    64                     break;

    65                 }

    66             }

    67             if (show) {

    68                 console.debug(str);

    69             }

    70         }

    71     }

    72 };

    73 

    74 // Prints an info message to the console.

    75 Logger.prototype.info = function(str) {

    76     if (this.enabled && this.level <= this.LOG_LEVEL_INFO) {

    77         console.info(str);

    78     }

    79 };

    80 

    81 // Prints a warning message to the console.

    82 Logger.prototype.warn = function(str) {

    83     if (this.enabled && this.level <= this.LOG_LEVEL_WARN) {

    84         console.warn(str);

    85     }

    86 };

    87 

    88 // Prints an error message to the console.

    89 Logger.prototype.error = function(str) {

    90     if (this.enabled && this.level <= this.LOG_LEVEL_ERROR) {

    91         console.error(str);

    92     }

    93 };