mediawiki.log.js: Add support for variadic arguments (just like the native console...

* Use unshift() when calling window.console.log (that way logging an object will not result in "prefix> [object Object]" but in "prefix> { key: .., .. }" (which most consoles do, similar thing for logging elements for which most console API implementations offer special features)
* Use string concatenation when using our own fabricated log. Did not use unshift for both, because in the latter that would show a bad comma ("prefix:>, foo, bar"). The native API does not show a comma between two logged variables, they're just shown next to each other.

diff --git a/resources/mediawiki/mediawiki.log.js b/resources/mediawiki/mediawiki.log.js
index 9c3d890..6dff8fc 100644 (file)
--- a/resources/mediawiki/mediawiki.log.js
+++ b/resources/mediawiki/mediawiki.log.js
@@ -15,17 +15,18 @@
         * a <div id="mw-log-console"> element to the bottom of the body and then appending this and future
         * messages to that, instead of the console.
         *
-        * @param logmsg {String} Messages to output to the console.
+        * @param {String} First in list of variadic messages to output to console.
         */
-       mw.log = function( logmsg ) {
-               // Allow log messages to use a configured prefix to identify the source window (ie. frame)
-               if ( mw.config.exists( 'mw.log.prefix' ) ) {
-                       logmsg = mw.config.get( 'mw.log.prefix' ) + '> ' + logmsg;
-               }
+       mw.log = function( /* logmsg, logmsg, */ ) {
+               // Turn arguments into an array
+               var     args = Array.prototype.slice.call( arguments ),
+                       // Allow log messages to use a configured prefix to identify the source window (ie. frame)
+                       prefix = mw.config.exists( 'mw.log.prefix' ) ? mw.config.get( 'mw.log.prefix' ) + '> ' : '';
 
                // Try to use an existing console
                if ( window.console !== undefined && $.isFunction( window.console.log ) ) {
-                       window.console.log( logmsg );
+                       args.unshift( prefix );
+                       window.console.log.apply( window.console, args );
                        return;
                }
 
@@ -66,7 +67,7 @@
                                                whiteSpace: 'pre-wrap',
                                                padding: '0.125em 0.25em'
                                        } )
-                                       .text( logmsg )
+                                       .text( prefix + args.join( ', ' ) )
                                        .prepend( '<span style="float: right;">[' + time + ']</span>' )
                );
        };