library/Zend/View/Helper/Placeholder/Registry.php

@@ -0,0 +1,188 @@
+<?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) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
+ * @version    $Id$
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ */
+
+/** Zend_Registry */
+require_once 'Zend/Registry.php';
+
+/** Zend_View_Helper_Placeholder_Container_Abstract */
+require_once 'Zend/View/Helper/Placeholder/Container/Abstract.php';
+
+/** Zend_View_Helper_Placeholder_Container */
+require_once 'Zend/View/Helper/Placeholder/Container.php';
+
+/**
+ * Registry for placeholder containers
+ *
+ * @package    Zend_View
+ * @subpackage Helper
+ * @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_View_Helper_Placeholder_Registry
+{
+    /**
+     * Zend_Registry key under which placeholder registry exists
+     * @const string
+     */
+    const REGISTRY_KEY = 'Zend_View_Helper_Placeholder_Registry';
+
+    /**
+     * Default container class
+     * @var string
+     */
+    protected $_containerClass = 'Zend_View_Helper_Placeholder_Container';
+
+    /**
+     * Placeholder containers
+     * @var array
+     */
+    protected $_items = array();
+
+    /**
+     * Retrieve or create registry instnace
+     *
+     * @return void
+     */
+    public static function getRegistry()
+    {
+        if (Zend_Registry::isRegistered(self::REGISTRY_KEY)) {
+            $registry = Zend_Registry::get(self::REGISTRY_KEY);
+        } else {
+            $registry = new self();
+            Zend_Registry::set(self::REGISTRY_KEY, $registry);
+        }
+
+        return $registry;
+    }
+
+    /**
+     * createContainer
+     *
+     * @param  string $key
+     * @param  array $value
+     * @return Zend_View_Helper_Placeholder_Container_Abstract
+     */
+    public function createContainer($key, array $value = array())
+    {
+        $key = (string) $key;
+
+        $this->_items[$key] = new $this->_containerClass($value);
+        return $this->_items[$key];
+    }
+
+    /**
+     * Retrieve a placeholder container
+     *
+     * @param  string $key
+     * @return Zend_View_Helper_Placeholder_Container_Abstract
+     */
+    public function getContainer($key)
+    {
+        $key = (string) $key;
+        if (isset($this->_items[$key])) {
+            return $this->_items[$key];
+        }
+
+        $container = $this->createContainer($key);
+
+        return $container;
+    }
+
+    /**
+     * Does a particular container exist?
+     *
+     * @param  string $key
+     * @return bool
+     */
+    public function containerExists($key)
+    {
+        $key = (string) $key;
+        $return =  array_key_exists($key, $this->_items);
+        return $return;
+    }
+
+    /**
+     * Set the container for an item in the registry
+     *
+     * @param  string $key
+     * @param  Zend_View_Placeholder_Container_Abstract $container
+     * @return Zend_View_Placeholder_Registry
+     */
+    public function setContainer($key, Zend_View_Helper_Placeholder_Container_Abstract $container)
+    {
+        $key = (string) $key;
+        $this->_items[$key] = $container;
+        return $this;
+    }
+
+    /**
+     * Delete a container
+     *
+     * @param  string $key
+     * @return bool
+     */
+    public function deleteContainer($key)
+    {
+        $key = (string) $key;
+        if (isset($this->_items[$key])) {
+            unset($this->_items[$key]);
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * Set the container class to use
+     *
+     * @param  string $name
+     * @return Zend_View_Helper_Placeholder_Registry
+     */
+    public function setContainerClass($name)
+    {
+        if (!class_exists($name)) {
+            require_once 'Zend/Loader.php';
+            Zend_Loader::loadClass($name);
+        }
+
+        $reflection = new ReflectionClass($name);
+        if (!$reflection->isSubclassOf(new ReflectionClass('Zend_View_Helper_Placeholder_Container_Abstract'))) {
+            require_once 'Zend/View/Helper/Placeholder/Registry/Exception.php';
+            $e = new Zend_View_Helper_Placeholder_Registry_Exception('Invalid Container class specified');
+            $e->setView($this->view);
+            throw $e;
+        }
+
+        $this->_containerClass = $name;
+        return $this;
+    }
+
+    /**
+     * Retrieve the container class
+     *
+     * @return string
+     */
+    public function getContainerClass()
+    {
+        return $this->_containerClass;
+    }
+}