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+/*!
+ * jQuery Badge plugin
+ *
+ * @license MIT
+ *
+ * @author Ryan Kaldari <rkaldari@wikimedia.org>, 2012
+ * @author Andrew Garrett <agarrett@wikimedia.org>, 2012
+ * @author Marius Hoch <hoo@online.de>, 2012
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * This program is distributed WITHOUT ANY WARRANTY.
+ */
+
+/**
+ * @class jQuery.plugin.badge
+ */
+( function ( $, mw ) {
+	/**
+	 * Put a badge on an item on the page. The badge container will be appended to the selected element(s).
+	 *
+	 *     $element.badge( text );
+	 *     $element.badge( 5 );
+	 *     $element.badge( '100+' );
+	 *     $element.badge( text, inline );
+	 *     $element.badge( 'New', true );
+	 *
+	 * @param {number|string} text The value to display in the badge. If the value is falsey (0,
+	 *  null, false, '', etc.), any existing badge will be removed.
+	 * @param {boolean} [inline=true] True if the badge should be displayed inline, false
+	 *  if the badge should overlay the parent element.
+	 * @param {boolean} [displayZero=false] True if the number zero should be displayed,
+	 *  false if the number zero should result in the badge being hidden
+	 * @return {jQuery}
+	 * @chainable
+	 */
+	$.fn.badge = function ( text, inline, displayZero ) {
+		var $badge = this.find( '.mw-badge' ),
+			badgeStyleClass = 'mw-badge-' + ( inline ? 'inline' : 'overlay' ),
+			isImportant = true,
+			displayBadge = true;
+
+		// If we're displaying zero, ensure style to be non-important
+		if ( mw.language.convertNumber( text, true ) === 0 ) {
+			isImportant = false;
+			if ( !displayZero ) {
+				displayBadge = false;
+			}
+		// If text is falsey (besides 0), hide the badge
+		} else if ( !text ) {
+			displayBadge = false;
+		}
+
+		if ( displayBadge ) {
+			// If a badge already exists, reuse it
+			if ( $badge.length ) {
+				$badge
+					.toggleClass( 'mw-badge-important', isImportant )
+					.find( '.mw-badge-content' ).text( text );
+			} else {
+				// Otherwise, create a new badge with the specified text and style
+				$badge = $( '<div class="mw-badge"></div>' )
+					.addClass( badgeStyleClass )
+					.toggleClass( 'mw-badge-important', isImportant )
+					.append(
+						$( '<span class="mw-badge-content"></span>' ).text( text )
+					)
+					.appendTo( this );
+			}
+		} else {
+			$badge.remove();
+		}
+		return this;
+	};
+
+	/**
+	 * @class jQuery
+	 * @mixins jQuery.plugin.badge
+	 */
+}( jQuery, mediaWiki ) );