/src/application/libraries/Zend/Tag/ItemList.php
PHP | 238 lines | 102 code | 24 blank | 112 comment | 15 complexity | 7961dc8244f51ba0bb9f9ed34ef54ce1 MD5 | raw file
- <?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_Tag
- * @subpackage ItemList
- * @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
- * @license http://framework.zend.com/license/new-bsd New BSD License
- * @version $Id: ItemList.php 23775 2011-03-01 17:25:24Z ralph $
- */
- /**
- * @see Zend_Tag_Taggable
- */
- require_once 'Zend/Tag/Taggable.php';
- /**
- * @category Zend
- * @package Zend_Tag
- * @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
- * @license http://framework.zend.com/license/new-bsd New BSD License
- */
- class Zend_Tag_ItemList implements Countable, SeekableIterator, ArrayAccess
- {
- /**
- * Items in this list
- *
- * @var array
- */
- protected $_items = array();
- /**
- * Count all items
- *
- * @return integer
- */
- public function count()
- {
- return count($this->_items);
- }
- /**
- * Spread values in the items relative to their weight
- *
- * @param array $values
- * @throws Zend_Tag_Exception When value list is empty
- * @return void
- */
- public function spreadWeightValues(array $values)
- {
- // Don't allow an empty value list
- if (count($values) === 0) {
- require_once 'Zend/Tag/Exception.php';
- throw new Zend_Tag_Exception('Value list may not be empty');
- }
- // Re-index the array
- $values = array_values($values);
- // If just a single value is supplied simply assign it to to all tags
- if (count($values) === 1) {
- foreach ($this->_items as $item) {
- $item->setParam('weightValue', $values[0]);
- }
- } else {
- // Calculate min- and max-weight
- $minWeight = null;
- $maxWeight = null;
- foreach ($this->_items as $item) {
- if ($minWeight === null && $maxWeight === null) {
- $minWeight = $item->getWeight();
- $maxWeight = $item->getWeight();
- } else {
- $minWeight = min($minWeight, $item->getWeight());
- $maxWeight = max($maxWeight, $item->getWeight());
- }
- }
- // Calculate the thresholds
- $steps = count($values);
- $delta = ($maxWeight - $minWeight) / ($steps - 1);
- $thresholds = array();
- for ($i = 0; $i < $steps; $i++) {
- $thresholds[$i] = floor(100 * log(($minWeight + $i * $delta) + 2));
- }
- // Then assign the weight values
- foreach ($this->_items as $item) {
- $threshold = floor(100 * log($item->getWeight() + 2));
- for ($i = 0; $i < $steps; $i++) {
- if ($threshold <= $thresholds[$i]) {
- $item->setParam('weightValue', $values[$i]);
- break;
- }
- }
- }
- }
- }
- /**
- * Seek to an absolute positio
- *
- * @param integer $index
- * @throws OutOfBoundsException When the seek position is invalid
- * @return void
- */
- public function seek($index)
- {
- $this->rewind();
- $position = 0;
- while ($position < $index && $this->valid()) {
- $this->next();
- $position++;
- }
- if (!$this->valid()) {
- throw new OutOfBoundsException('Invalid seek position');
- }
- }
- /**
- * Return the current element
- *
- * @return mixed
- */
- public function current()
- {
- return current($this->_items);
- }
- /**
- * Move forward to next element
- *
- * @return mixed
- */
- public function next()
- {
- return next($this->_items);
- }
- /**
- * Return the key of the current element
- *
- * @return mixed
- */
- public function key()
- {
- return key($this->_items);
- }
- /**
- * Check if there is a current element after calls to rewind() or next()
- *
- * @return boolean
- */
- public function valid()
- {
- return ($this->current() !== false);
- }
- /**
- * Rewind the Iterator to the first element
- *
- * @return void
- */
- public function rewind()
- {
- reset($this->_items);
- }
- /**
- * Check if an offset exists
- *
- * @param mixed $offset
- * @return boolean
- */
- public function offsetExists($offset) {
- return array_key_exists($offset, $this->_items);
- }
- /**
- * Get the value of an offset
- *
- * @param mixed $offset
- * @return Zend_Tag_Taggable
- */
- public function offsetGet($offset) {
- return $this->_items[$offset];
- }
- /**
- * Append a new item
- *
- * @param mixed $offset
- * @param Zend_Tag_Taggable $item
- * @throws OutOfBoundsException When item does not implement Zend_Tag_Taggable
- * @return void
- */
- public function offsetSet($offset, $item) {
- // We need to make that check here, as the method signature must be
- // compatible with ArrayAccess::offsetSet()
- if (!($item instanceof Zend_Tag_Taggable)) {
- require_once 'Zend/Tag/Exception.php';
- throw new Zend_Tag_Exception('Item must implement Zend_Tag_Taggable');
- }
- if ($offset === null) {
- $this->_items[] = $item;
- } else {
- $this->_items[$offset] = $item;
- }
- }
- /**
- * Unset an item
- *
- * @param mixed $offset
- * @return void
- */
- public function offsetUnset($offset) {
- unset($this->_items[$offset]);
- }
- }