/joomla/meta/customization/rt_quasar_j15/features/fontsizer.php

<?php
/**
 * @package		Gantry Template Framework - RocketTheme
 * @version		@VERSION@ @BUILD_DATE@
 * @author		RocketTheme http://www.rockettheme.com
 * @copyright 	Copyright (C) 2007 - @COPYRIGHT_YEAR@ RocketTheme, LLC
 * @license		http://www.gnu.org/licenses/gpl-2.0.html GNU/GPLv2 only
 *
 * Gantry uses the Joomla Framework (http://www.joomla.org), a GNU/GPLv2 content management system
 *
 */

defined('JPATH_BASE') or die();

gantry_import('core.gantryfeature');

class GantryFeatureFontSizer extends GantryFeature {
    var $_feature_name = 'fontsizer';
    
	function init() {
        global $gantry;
		$fontsize = $gantry->get('font-size');
        $current_fontsize = $gantry->get('font-size-is');
        $font_sizes = array(
                0=>"xsmall",
                1=>"small",
                2=>"default",
                3=>"large",
                4=>"xlarge"
        );

		$current = array_search($current_fontsize, $font_sizes);
        if ($current !== false){
            switch ($fontsize){
                case 'smaller':
                    if ($current > 0) $current--;
                    break;
                case 'larger':
                    if ($current < count($font_sizes)-1) $current++;
                    break;
            }
            $gantry->set('font-size-is', $font_sizes[$current]);
        }
	}
	
	function render($position="") {
        global $gantry;
		ob_start();
		?>
		<div class="rt-block">
			<div id="rt-accessibility">
				<div class="rt-desc"><?php echo JText::_('TEXT_SIZE'); ?></div>
				<div id="rt-buttons">
					<a href="<?php echo JROUTE::_($gantry->getCurrentUrl() . "font-size=larger"); ?>" title="<?php echo JText::_('INC_FONT_SIZE'); ?>" class="large"><span class="button"></span></a>
					<a href="<?php echo JROUTE::_($gantry->getCurrentUrl() . "font-size=smaller"); ?>" title="<?php echo JText::_('DEC_FONT_SIZE'); ?>" class="small"><span class="button"></span></a>
				</div>
			</div>
			<div class="clear"></div>
		</div>
		<?php
		return ob_get_clean();
	}
}