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1 | <?php |
2 | /* | |
3 | +--------------------------------------------------------------------+ | |
4 | | CiviCRM version 4.3 | | |
5 | +--------------------------------------------------------------------+ | |
6 | | Copyright CiviCRM LLC (c) 2004-2013 | | |
7 | +--------------------------------------------------------------------+ | |
8 | | This file is a part of CiviCRM. | | |
9 | | | | |
10 | | CiviCRM is free software; you can copy, modify, and distribute it | | |
11 | | under the terms of the GNU Affero General Public License | | |
12 | | Version 3, 19 November 2007 and the CiviCRM Licensing Exception. | | |
13 | | | | |
14 | | CiviCRM is distributed in the hope that it will be useful, but | | |
15 | | WITHOUT ANY WARRANTY; without even the implied warranty of | | |
16 | | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | | |
17 | | See the GNU Affero General Public License for more details. | | |
18 | | | | |
19 | | You should have received a copy of the GNU Affero General Public | | |
20 | | License and the CiviCRM Licensing Exception along | | |
21 | | with this program; if not, contact CiviCRM LLC | | |
22 | | at info[AT]civicrm[DOT]org. If you have questions about the | | |
23 | | GNU Affero General Public License or the licensing of CiviCRM, | | |
24 | | see the CiviCRM license FAQ at http://civicrm.org/licensing | | |
25 | +--------------------------------------------------------------------+ | |
26 | */ | |
27 | ||
28 | /** | |
29 | * | |
30 | * | |
31 | * @package CRM | |
32 | * @copyright CiviCRM LLC (c) 2004-2013 | |
33 | * $Id$ | |
34 | * | |
35 | */ | |
36 | class CRM_Core_ClassLoader { | |
37 | ||
38 | /** | |
39 | * We only need one instance of this object. So we use the singleton | |
40 | * pattern and cache the instance in this variable | |
41 | * @var object | |
42 | * @static | |
43 | */ | |
44 | private static $_singleton = NULL; | |
45 | ||
46 | static function &singleton($force = FALSE) { | |
47 | if ($force || self::$_singleton === NULL) { | |
48 | self::$_singleton = new CRM_Core_ClassLoader(); | |
49 | } | |
50 | return self::$_singleton; | |
51 | } | |
52 | ||
53 | /** | |
54 | * @var bool TRUE if previously registered | |
55 | */ | |
56 | protected $_registered; | |
57 | ||
58 | protected function __construct() { | |
59 | $this->_registered = FALSE; | |
60 | } | |
61 | ||
62 | /** | |
63 | * Registers this instance as an autoloader. | |
64 | * | |
65 | * @param Boolean $prepend Whether to prepend the autoloader or not | |
66 | * | |
67 | * @api | |
68 | */ | |
69 | function register($prepend = FALSE) { | |
70 | if ($this->_registered) { | |
71 | return; | |
72 | } | |
73 | ||
74 | // we do this to prevent a autoloader errors with joomla / 3rd party packages | |
75 | // use absolute path since we dont know the content of include_path as yet | |
76 | // CRM-11304 | |
77 | ||
78 | // since HTML Purifier could potentially be loaded / used by other modules / components | |
79 | // lets check it its already loaded | |
80 | // we also check if the bootstrap file exists since during install of a drupal distro profile | |
81 | // the files might not exists, in which case we skip loading the file | |
82 | // if you change the below, please test on Joomla and also PCP pages | |
83 | $includeHTMLPurifier = TRUE; | |
84 | $htmlPurifierPath = dirname(__FILE__) . '/../../packages/IDS/vendors/htmlpurifier/HTMLPurifier/Bootstrap.php'; | |
85 | if ( | |
86 | class_exists('HTMLPurifier_Bootstrap') || | |
87 | !file_exists($htmlPurifierPath) | |
88 | ) { | |
89 | $includeHTMLPurifier = FALSE; | |
90 | } | |
91 | else { | |
92 | require_once $htmlPurifierPath; | |
93 | } | |
94 | ||
95 | if (version_compare(PHP_VERSION, '5.3.0') >= 0) { | |
96 | spl_autoload_register(array($this, 'loadClass'), TRUE, $prepend); | |
97 | if ($includeHTMLPurifier) { | |
98 | spl_autoload_register(array('HTMLPurifier_Bootstrap', 'autoload'), TRUE, $prepend); | |
99 | } | |
100 | } | |
101 | else { | |
102 | // http://www.php.net/manual/de/function.spl-autoload-register.php#107362 | |
103 | // "when specifying the third parameter (prepend), the function will fail badly in PHP 5.2" | |
104 | spl_autoload_register(array($this, 'loadClass'), TRUE); | |
105 | if ($includeHTMLPurifier) { | |
106 | spl_autoload_register(array('HTMLPurifier_Bootstrap', 'autoload'), TRUE); | |
107 | } | |
108 | } | |
109 | ||
110 | $this->_registered = TRUE; | |
111 | } | |
112 | ||
113 | function loadClass($class) { | |
114 | if ( | |
115 | // Only load classes that clearly belong to CiviCRM. | |
116 | 0 === strncmp($class, 'CRM_', 4) && | |
117 | // Do not load PHP 5.3 namespaced classes. | |
118 | // (in a future version, maybe) | |
119 | FALSE === strpos($class, '\\') | |
120 | ) { | |
121 | $file = strtr($class, '_', '/') . '.php'; | |
122 | // There is some question about the best way to do this. | |
123 | // "require_once" is nice because it's simple and throws | |
124 | // intelligible errors. The down side is that autoloaders | |
125 | // down the chain cannot try to find the file if we fail. | |
126 | require_once ($file); | |
127 | } | |
128 | } | |
129 | } | |
130 |