1: <?php
 2: /**
 3:  * Magento
 4:  *
 5:  * NOTICE OF LICENSE
 6:  *
 7:  * This source file is subject to the Open Software License (OSL 3.0)
 8:  * that is bundled with this package in the file LICENSE.txt.
 9:  * It is also available through the world-wide-web at this URL:
10:  * http://opensource.org/licenses/osl-3.0.php
11:  * If you did not receive a copy of the license and are unable to
12:  * obtain it through the world-wide-web, please send an email
13:  * to license@magentocommerce.com so we can send you a copy immediately.
14:  *
15:  * DISCLAIMER
16:  *
17:  * Do not edit or add to this file if you wish to upgrade Magento to newer
18:  * versions in the future. If you wish to customize Magento for your
19:  * needs please refer to http://www.magentocommerce.com for more information.
20:  *
21:  * @category    Mage
22:  * @package     Mage_CatalogSearch
23:  * @copyright   Copyright (c) 2012 Magento Inc. (http://www.magentocommerce.com)
24:  * @license     http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
25:  */
26: 
27: /**
28:  * Layered Navigation block for search
29:  *
30:  */
31: class Mage_CatalogSearch_Block_Layer extends Mage_Catalog_Block_Layer_View
32: {
33:     /**
34:      * Internal constructor
35:      */
36:     protected function _construct()
37:     {
38:         parent::_construct();
39:         Mage::register('current_layer', $this->getLayer(), true);
40:     }
41: 
42:     /**
43:      * Get attribute filter block name
44:      *
45:      * @deprecated after 1.4.1.0
46:      *
47:      * @return string
48:      */
49:     protected function _getAttributeFilterBlockName()
50:     {
51:         return 'catalogsearch/layer_filter_attribute';
52:     }
53: 
54:     /**
55:      * Initialize blocks names
56:      */
57:     protected function _initBlocks()
58:     {
59:         parent::_initBlocks();
60: 
61:         $this->_attributeFilterBlockName = 'catalogsearch/layer_filter_attribute';
62:     }
63: 
64:     /**
65:      * Get layer object
66:      *
67:      * @return Mage_Catalog_Model_Layer
68:      */
69:     public function getLayer()
70:     {
71:         return Mage::getSingleton('catalogsearch/layer');
72:     }
73: 
74:     /**
75:      * Check availability display layer block
76:      *
77:      * @return bool
78:      */
79:     public function canShowBlock()
80:     {
81:         $_isLNAllowedByEngine = Mage::helper('catalogsearch')->getEngine()->isLeyeredNavigationAllowed();
82:         if (!$_isLNAllowedByEngine) {
83:             return false;
84:         }
85:         $availableResCount = (int) Mage::app()->getStore()
86:             ->getConfig(Mage_CatalogSearch_Model_Layer::XML_PATH_DISPLAY_LAYER_COUNT);
87: 
88:         if (!$availableResCount
89:             || ($availableResCount>=$this->getLayer()->getProductCollection()->getSize())) {
90:             return parent::canShowBlock();
91:         }
92:         return false;
93:     }
94: }
95: