resources/src/mediawiki/mediawiki.log.js

   1 /*!
   2  * Logger for MediaWiki javascript.
   3  * Implements the stub left by the main 'mediawiki' module.
   4  *
   5  * @author Michael Dale <mdale@wikimedia.org>
   6  * @author Trevor Parscal <tparscal@wikimedia.org>
   7  */
   8
   9 ( function ( mw, $ ) {
  10
  11         // Keep reference to the dummy placeholder from mediawiki.js
  12         // The root is replaced below, but it has other methods that we need to restore.
  13         var original = mw.log,
  14                 slice = Array.prototype.slice;
  15
  16         /**
  17          * Logs a message to the console in debug mode.
  18          *
  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.
  22          *
  23          * @member mw.log
  24          * @param {...string} msg Messages to output to console.
  25          */
  26         mw.log = function () {
  27                 // Turn arguments into an array
  28                 var args = slice.call( arguments ),
  29                         // Allow log messages to use a configured prefix to identify the source window (ie. frame)
  30                         prefix = mw.config.exists( 'mw.log.prefix' ) ? mw.config.get( 'mw.log.prefix' ) + '> ' : '';
  31
  32                 // Try to use an existing console
  33                 // Generally we can cache this, but in this case we want to re-evaluate this as a
  34                 // global property live so that things like Firebug Lite can take precedence.
  35                 if ( window.console && window.console.log && window.console.log.apply ) {
  36                         args.unshift( prefix );
  37                         window.console.log.apply( window.console, args );
  38                         return;
  39                 }
  40
  41                 // If there is no console, use our own log box
  42                 mw.loader.using( 'jquery.footHovzer', function () {
  43
  44                         var     hovzer,
  45                                 d = new Date(),
  46                                 // Create HH:MM:SS.MIL timestamp
  47                                 time = ( d.getHours() < 10 ? '0' + d.getHours() : d.getHours() ) +
  48                                         ':' + ( d.getMinutes() < 10 ? '0' + d.getMinutes() : d.getMinutes() ) +
  49                                         ':' + ( d.getSeconds() < 10 ? '0' + d.getSeconds() : d.getSeconds() ) +
  50                                         '.' + ( d.getMilliseconds() < 10 ? '00' + d.getMilliseconds() : ( d.getMilliseconds() < 100 ? '0' + d.getMilliseconds() : d.getMilliseconds() ) ),
  51                                 $log = $( '#mw-log-console' );
  52
  53                         if ( !$log.length ) {
  54                                 $log = $( '<div id="mw-log-console"></div>' ).css( {
  55                                         overflow: 'auto',
  56                                         height: '150px',
  57                                         backgroundColor: 'white',
  58                                         borderTop: 'solid 2px #ADADAD'
  59                                 } );
  60                                 hovzer = $.getFootHovzer();
  61                                 hovzer.$.append( $log );
  62                                 hovzer.update();
  63                         }
  64                         $log.append(
  65                                 $( '<div>' )
  66                                         .css( {
  67                                                 borderBottom: 'solid 1px #DDDDDD',
  68                                                 fontSize: 'small',
  69                                                 fontFamily: 'monospace',
  70                                                 whiteSpace: 'pre-wrap',
  71                                                 padding: '0.125em 0.25em'
  72                                         } )
  73                                         .text( prefix + args.join( ', ' ) )
  74                                         .prepend( '<span style="float: right;">[' + time + ']</span>' )
  75                         );
  76                 } );
  77         };
  78
  79         // Restore original methods
  80         mw.log.warn = original.warn;
  81         mw.log.error = original.error;
  82         mw.log.deprecate = original.deprecate;
  83
  84 }( mediaWiki, jQuery ) );