2 * Logger for MediaWiki javascript.
3 * Implements the stub left by the main 'mediawiki' module.
5 * @author Michael Dale <mdale@wikimedia.org>
6 * @author Trevor Parscal <tparscal@wikimedia.org>
17 * Logs a message to the console.
19 * In the case the browser does not have a console API, a console is created on-the-fly by appending
20 * a `<div id="mw-log-console">` element to the bottom of the body and then appending this and future
21 * messages to that, instead of the console.
23 * @param {string...} msg Messages to output to console.
25 mw.log = function () {
26 // Turn arguments into an array
27 var args = Array.prototype.slice.call( arguments ),
28 // Allow log messages to use a configured prefix to identify the source window (ie. frame)
29 prefix = mw.config.exists( 'mw.log.prefix' ) ? mw.config.get( 'mw.log.prefix' ) + '> ' : '';
31 // Try to use an existing console
32 if ( window.console !== undefined && $.isFunction( window.console.log ) ) {
33 args.unshift( prefix );
34 window.console.log.apply( window.console, args );
38 // If there is no console, use our own log box
39 mw.loader.using( 'jquery.footHovzer', function () {
43 // Create HH:MM:SS.MIL timestamp
44 time = ( d.getHours() < 10 ? '0' + d.getHours() : d.getHours() ) +
45 ':' + ( d.getMinutes() < 10 ? '0' + d.getMinutes() : d.getMinutes() ) +
46 ':' + ( d.getSeconds() < 10 ? '0' + d.getSeconds() : d.getSeconds() ) +
47 '.' + ( d.getMilliseconds() < 10 ? '00' + d.getMilliseconds() : ( d.getMilliseconds() < 100 ? '0' + d.getMilliseconds() : d.getMilliseconds() ) ),
48 $log = $( '#mw-log-console' );
51 $log = $( '<div id="mw-log-console"></div>' ).css( {
54 backgroundColor: 'white',
55 borderTop: 'solid 2px #ADADAD'
57 hovzer = $.getFootHovzer();
58 hovzer.$.append( $log );
64 borderBottom: 'solid 1px #DDDDDD',
66 fontFamily: 'monospace',
67 whiteSpace: 'pre-wrap',
68 padding: '0.125em 0.25em'
70 .text( prefix + args.join( ', ' ) )
71 .prepend( '<span style="float: right;">[' + time + ']</span>' )
77 * Write a message the console's warning channel.
78 * Also logs a stacktrace for easier debugging.
79 * Each action is silently ignored if the browser doesn't support it.
81 * @param {string...} msg Messages to output to console
83 mw.log.warn = function () {
84 var console = window.console;
85 if ( console && console.warn ) {
86 console.warn.apply( console, arguments );
87 if ( console.trace ) {
94 * Create a property in a host object that, when accessed, will produce
95 * a deprecation warning in the console with backtrace.
97 * @param {Object} obj Host object of deprecated property
98 * @param {string} key Name of property to create in `obj`
99 * @param {Mixed} val The value this property should return when accessed
100 * @param {string} [msg] Optional text to include in the deprecation message.
102 mw.log.deprecate = !Object.defineProperty ? function ( obj, key, val ) {
104 } : function ( obj, key, val, msg ) {
105 msg = 'MWDeprecationWarning: Use of "' + key + '" property is deprecated.' +
106 ( msg ? ( ' ' + msg ) : '' );
108 Object.defineProperty( obj, key, {
115 set: function ( newVal ) {
121 // IE8 can throw on Object.defineProperty
126 }( mediaWiki, jQuery ) );