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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_View
* @subpackage Helper
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @version $Id: Cycle.php 17449 2009-08-08 08:10:25Z yoshida@zend.co.jp $
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
/**
* Helper for alternating between set of values
*
* @package Zend_View
* @subpackage Helper
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_View_Helper_Cycle implements Iterator
{
/**
* Default name
* @var string
*/
const DEFAULT_NAME = 'default';
/**
* Pointers
*
* @var array
*/
protected $_pointers = array(self::DEFAULT_NAME =>-1) ;
/**
* Array of values
*
* @var array
*/
protected $_data = array(self::DEFAULT_NAME=>array());
/**
* Actual name of cycle
*
* @var string
*/
protected $_name = self::DEFAULT_NAME;
/**
* Add elements to alternate
*
* @param array $data
* @param string $name
* @return Zend_View_Helper_Cycle
*/
public function cycle(array $data = array(), $name = self::DEFAULT_NAME)
{
if(!empty($data))
$this->_data[$name] = $data;
$this->setName($name);
return $this;
}
/**
* Add elements to alternate
*
* @param array $data
* @param string $name
* @return Zend_View_Helper_Cycle
*/
public function assign(Array $data , $name = self::DEFAULT_NAME)
{
$this->setName($name);
$this->_data[$name] = $data;
$this->rewind();
return $this;
}
/**
* Sets actual name of cycle
*
* @param $name
* @return Zend_View_Helper_Cycle
*/
public function setName($name = self::DEFAULT_NAME)
{
$this->_name = $name;
if(!isset($this->_data[$this->_name]))
$this->_data[$this->_name] = array();
if(!isset($this->_pointers[$this->_name]))
$this->rewind();
return $this;
}
/**
* Gets actual name of cycle
*
* @param $name
* @return string
*/
public function getName()
{
return $this->_name;
}
/**
* Return all elements
*
* @return array
*/
public function getAll()
{
return $this->_data[$this->_name];
}
/**
* Turn helper into string
*
* @return string
*/
public function toString()
{
return (string) $this->_data[$this->_name][$this->key()];
}
/**
* Cast to string
*
* @return string
*/
public function __toString()
{
return $this->toString();
}
/**
* Move to next value
*
* @return Zend_View_Helper_Cycle
*/
public function next()
{
$count = count($this->_data[$this->_name]);
if ($this->_pointers[$this->_name] == ($count - 1))
$this->_pointers[$this->_name] = 0;
else
$this->_pointers[$this->_name] = ++$this->_pointers[$this->_name];
return $this;
}
/**
* Move to previous value
*
* @return Zend_View_Helper_Cycle
*/
public function prev()
{
$count = count($this->_data[$this->_name]);
if ($this->_pointers[$this->_name] <= 0)
$this->_pointers[$this->_name] = $count - 1;
else
$this->_pointers[$this->_name] = --$this->_pointers[$this->_name];
return $this;
}
/**
* Return iteration number
*
* @return int
*/
public function key()
{
if ($this->_pointers[$this->_name] < 0)
return 0;
else
return $this->_pointers[$this->_name];
}
/**
* Rewind pointer
*
* @return Zend_View_Helper_Cycle
*/
public function rewind()
{
$this->_pointers[$this->_name] = -1;
return $this;
}
/**
* Check if element is valid
*
* @return bool
*/
public function valid()
{
return isset($this->_data[$this->_name][$this->key()]);
}
/**
* Return current element
*
* @return mixed
*/
public function current()
{
return $this->_data[$this->_name][$this->key()];
}
}
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