projects / github / wallabag / wallabag.git / blame
| Commit | Line | Data |
|---|---|---|
| d4949327 NL |
1 | <?php\r |
| 2 | \r | |
| 3 | /**\r | |
| 4 | * Microsoft's proprietary filter: CSS property\r | |
| 5 | * @note Currently supports the alpha filter. In the future, this will\r | |
| 6 | * probably need an extensible framework\r | |
| 7 | */\r | |
| 8 | class HTMLPurifier_AttrDef_CSS_Filter extends HTMLPurifier_AttrDef\r | |
| 9 | {\r | |
| 10 | /**\r | |
| 11 | * @type HTMLPurifier_AttrDef_Integer\r | |
| 12 | */\r | |
| 13 | protected $intValidator;\r | |
| 14 | \r | |
| 15 | public function __construct()\r | |
| 16 | {\r | |
| 17 | $this->intValidator = new HTMLPurifier_AttrDef_Integer();\r | |
| 18 | }\r | |
| 19 | \r | |
| 20 | /**\r | |
| 21 | * @param string $value\r | |
| 22 | * @param HTMLPurifier_Config $config\r | |
| 23 | * @param HTMLPurifier_Context $context\r | |
| 24 | * @return bool|string\r | |
| 25 | */\r | |
| 26 | public function validate($value, $config, $context)\r | |
| 27 | {\r | |
| 28 | $value = $this->parseCDATA($value);\r | |
| 29 | if ($value === 'none') {\r | |
| 30 | return $value;\r | |
| 31 | }\r | |
| 32 | // if we looped this we could support multiple filters\r | |
| 33 | $function_length = strcspn($value, '(');\r | |
| 34 | $function = trim(substr($value, 0, $function_length));\r | |
| 35 | if ($function !== 'alpha' &&\r | |
| 36 | $function !== 'Alpha' &&\r | |
| 37 | $function !== 'progid:DXImageTransform.Microsoft.Alpha'\r | |
| 38 | ) {\r | |
| 39 | return false;\r | |
| 40 | }\r | |
| 41 | $cursor = $function_length + 1;\r | |
| 42 | $parameters_length = strcspn($value, ')', $cursor);\r | |
| 43 | $parameters = substr($value, $cursor, $parameters_length);\r | |
| 44 | $params = explode(',', $parameters);\r | |
| 45 | $ret_params = array();\r | |
| 46 | $lookup = array();\r | |
| 47 | foreach ($params as $param) {\r | |
| 48 | list($key, $value) = explode('=', $param);\r | |
| 49 | $key = trim($key);\r | |
| 50 | $value = trim($value);\r | |
| 51 | if (isset($lookup[$key])) {\r | |
| 52 | continue;\r | |
| 53 | }\r | |
| 54 | if ($key !== 'opacity') {\r | |
| 55 | continue;\r | |
| 56 | }\r | |
| 57 | $value = $this->intValidator->validate($value, $config, $context);\r | |
| 58 | if ($value === false) {\r | |
| 59 | continue;\r | |
| 60 | }\r | |
| 61 | $int = (int)$value;\r | |
| 62 | if ($int > 100) {\r | |
| 63 | $value = '100';\r | |
| 64 | }\r | |
| 65 | if ($int < 0) {\r | |
| 66 | $value = '0';\r | |
| 67 | }\r | |
| 68 | $ret_params[] = "$key=$value";\r | |
| 69 | $lookup[$key] = true;\r | |
| 70 | }\r | |
| 71 | $ret_parameters = implode(',', $ret_params);\r | |
| 72 | $ret_function = "$function($ret_parameters)";\r | |
| 73 | return $ret_function;\r | |
| 74 | }\r | |
| 75 | }\r | |
| 76 | \r | |
| 77 | // vim: et sw=4 sts=4\r |