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<?php
/**
 * Smarty plugin
 * @package Smarty
 * @subpackage plugins
 */

/**
 * Smarty {cycle} function plugin
 *
 * Type: function 
 * Name: cycle 
 * Date: May 3, 2002 
 * Purpose: cycle through given values 
 * Input:
 * - name = name of cycle (optional)
 * - values = comma separated list of values to cycle,
 * or an array of values to cycle
 * (this can be left out for subsequent calls)
 * - reset = boolean - resets given var to true
 * - print = boolean - print var or not. default is true
 * - advance = boolean - whether or not to advance the cycle
 * - delimiter = the value delimiter, default is ","
 * - assign = boolean, assigns to template var instead of
 * printed.
 *
 * Examples: 
 * <pre>
 * {cycle values="#eeeeee,#d0d0d0d"}
 * {cycle name=row values="one,two,three" reset=true}
 * {cycle name=row}
 * </pre>
 * @link http://smarty.php.net/manual/en/language.function.cycle.php {cycle}
 * (Smarty online manual)
 * @author Monte Ohrt <monte at ohrt dot com>
 * @author credit to Mark Priatel <mpriatel@rogers.com>
 * @author credit to Gerard <gerard@interfold.com>
 * @author credit to Jason Sweat <jsweat_php@yahoo.com>
 * @version 1.3
 * @param array
 * @param Smarty
 * @return string|null
 */
function smarty_function_cycle($params, &$smarty)
{
 static $cycle_vars;
 
 $name = (empty($params['name'])) ? 'default' : $params['name'];
 $print = (isset($params['print'])) ? (bool)$params['print'] : true;
 $advance = (isset($params['advance'])) ? (bool)$params['advance'] : true;
 $reset = (isset($params['reset'])) ? (bool)$params['reset'] : false;
 
 if (!in_array('values', array_keys($params))) {
 if(!isset($cycle_vars[$name]['values'])) {
 $smarty->trigger_error("cycle: missing 'values' parameter");
 return;
 }
 } else {
 if(isset($cycle_vars[$name]['values'])
 && $cycle_vars[$name]['values'] != $params['values'] ) {
 $cycle_vars[$name]['index'] = 0;
 }
 $cycle_vars[$name]['values'] = $params['values'];
 }

$cycle_vars[$name]['delimiter'] = (isset($params['delimiter'])) ? $params['delimiter'] : ',';
    
    if(is_array($cycle_vars[$name]['values'])) {
        $cycle_array = $cycle_vars[$name]['values'];
    } else {
        $cycle_array = explode($cycle_vars[$name]['delimiter'],$cycle_vars[$name]['values']);
    }
    
    if(!isset($cycle_vars[$name]['index']) || $reset ) {
        $cycle_vars[$name]['index'] = 0;
    }
    
    if (isset($params['assign'])) {
        $print = false;
        $smarty->assign($params['assign'], $cycle_array[$cycle_vars[$name]['index']]);
    }
        
    if($print) {
        $retval = $cycle_array[$cycle_vars[$name]['index']];
    } else {
        $retval = null;
    }

if($advance) {
        if ( $cycle_vars[$name]['index'] >= count($cycle_array) -1 ) {
            $cycle_vars[$name]['index'] = 0;
        } else {
            $cycle_vars[$name]['index']++;
        }
    }
    
    return $retval;
}

/* vim: set expandtab: */