library/plugins/function.cycle.php

   1 <?php
   2 /**
   3  * Smarty plugin
   4  * @package Smarty
   5  * @subpackage plugins
   6  */
   7
   8 /**
   9  * Smarty {cycle} function plugin
  10  *
  11  * Type:     function<br>
  12  * Name:     cycle<br>
  13  * Date:     May 3, 2002<br>
  14  * Purpose:  cycle through given values<br>
  15  * Input:
  16  *         - name = name of cycle (optional)
  17  *         - values = comma separated list of values to cycle,
  18  *                    or an array of values to cycle
  19  *                    (this can be left out for subsequent calls)
  20  *         - reset = boolean - resets given var to true
  21  *         - print = boolean - print var or not. default is true
  22  *         - advance = boolean - whether or not to advance the cycle
  23  *         - delimiter = the value delimiter, default is ","
  24  *         - assign = boolean, assigns to template var instead of
  25  *                    printed.
  26  *
  27  * Examples:<br>
  28  * <pre>
  29  * {cycle values="#eeeeee,#d0d0d0d"}
  30  * {cycle name=row values="one,two,three" reset=true}
  31  * {cycle name=row}
  32  * </pre>
  33  * @link http://smarty.php.net/manual/en/language.function.cycle.php {cycle}
  34  *       (Smarty online manual)
  35  * @author Monte Ohrt <monte@ispi.net>
  36  * @author credit to Mark Priatel <mpriatel@rogers.com>
  37  * @author credit to Gerard <gerard@interfold.com>
  38  * @author credit to Jason Sweat <jsweat_php@yahoo.com>
  39  * @version  1.3
  40  * @param array
  41  * @param Smarty
  42  * @return string|null
  43  */
  44 function smarty_function_cycle($params, &$smarty)
  45 {
  46     static $cycle_vars;
  47
  48     $name = (empty($params['name'])) ? 'default' : $params['name'];
  49     $print = (isset($params['print'])) ? (bool)$params['print'] : true;
  50     $advance = (isset($params['advance'])) ? (bool)$params['advance'] : true;
  51     $reset = (isset($params['reset'])) ? (bool)$params['reset'] : false;
  52
  53     if (!in_array('values', array_keys($params))) {
  54         if(!isset($cycle_vars[$name]['values'])) {
  55             $smarty->trigger_error("cycle: missing 'values' parameter");
  56             return;
  57         }
  58     } else {
  59         if(isset($cycle_vars[$name]['values'])
  60             && $cycle_vars[$name]['values'] != $params['values'] ) {
  61             $cycle_vars[$name]['index'] = 0;
  62         }
  63         $cycle_vars[$name]['values'] = $params['values'];
  64     }
  65
  66     $cycle_vars[$name]['delimiter'] = (isset($params['delimiter'])) ? $params['delimiter'] : ',';
  67
  68     if(is_array($cycle_vars[$name]['values'])) {
  69         $cycle_array = $cycle_vars[$name]['values'];
  70     } else {
  71         $cycle_array = explode($cycle_vars[$name]['delimiter'],$cycle_vars[$name]['values']);
  72     }
  73
  74     if(!isset($cycle_vars[$name]['index']) || $reset ) {
  75         $cycle_vars[$name]['index'] = 0;
  76     }
  77
  78     if (isset($params['assign'])) {
  79         $print = false;
  80         $smarty->assign($params['assign'], $cycle_array[$cycle_vars[$name]['index']]);
  81     }
  82
  83     if($print) {
  84         $retval = $cycle_array[$cycle_vars[$name]['index']];
  85     } else {
  86         $retval = null;
  87     }
  88
  89     if($advance) {
  90         if ( $cycle_vars[$name]['index'] >= count($cycle_array) -1 ) {
  91             $cycle_vars[$name]['index'] = 0;
  92         } else {
  93             $cycle_vars[$name]['index']++;
  94         }
  95     }
  96
  97     return $retval;
  98 }
  99
 100 /* vim: set expandtab: */
 101
 102 ?>