projects / github / wallabag / wallabag.git / blame
| Commit | Line | Data |
|---|---|---|
| d4949327 NL |
1 | <?php\r |
| 2 | \r | |
| 3 | /**\r | |
| 4 | * Validates a number as defined by the CSS spec.\r | |
| 5 | */\r | |
| 6 | class HTMLPurifier_AttrDef_CSS_Number extends HTMLPurifier_AttrDef\r | |
| 7 | {\r | |
| 8 | \r | |
| 9 | /**\r | |
| 10 | * Indicates whether or not only positive values are allowed.\r | |
| 11 | * @type bool\r | |
| 12 | */\r | |
| 13 | protected $non_negative = false;\r | |
| 14 | \r | |
| 15 | /**\r | |
| 16 | * @param bool $non_negative indicates whether negatives are forbidden\r | |
| 17 | */\r | |
| 18 | public function __construct($non_negative = false)\r | |
| 19 | {\r | |
| 20 | $this->non_negative = $non_negative;\r | |
| 21 | }\r | |
| 22 | \r | |
| 23 | /**\r | |
| 24 | * @param string $number\r | |
| 25 | * @param HTMLPurifier_Config $config\r | |
| 26 | * @param HTMLPurifier_Context $context\r | |
| 27 | * @return string|bool\r | |
| 28 | * @warning Some contexts do not pass $config, $context. These\r | |
| 29 | * variables should not be used without checking HTMLPurifier_Length\r | |
| 30 | */\r | |
| 31 | public function validate($number, $config, $context)\r | |
| 32 | {\r | |
| 33 | $number = $this->parseCDATA($number);\r | |
| 34 | \r | |
| 35 | if ($number === '') {\r | |
| 36 | return false;\r | |
| 37 | }\r | |
| 38 | if ($number === '0') {\r | |
| 39 | return '0';\r | |
| 40 | }\r | |
| 41 | \r | |
| 42 | $sign = '';\r | |
| 43 | switch ($number[0]) {\r | |
| 44 | case '-':\r | |
| 45 | if ($this->non_negative) {\r | |
| 46 | return false;\r | |
| 47 | }\r | |
| 48 | $sign = '-';\r | |
| 49 | case '+':\r | |
| 50 | $number = substr($number, 1);\r | |
| 51 | }\r | |
| 52 | \r | |
| 53 | if (ctype_digit($number)) {\r | |
| 54 | $number = ltrim($number, '0');\r | |
| 55 | return $number ? $sign . $number : '0';\r | |
| 56 | }\r | |
| 57 | \r | |
| 58 | // Period is the only non-numeric character allowed\r | |
| 59 | if (strpos($number, '.') === false) {\r | |
| 60 | return false;\r | |
| 61 | }\r | |
| 62 | \r | |
| 63 | list($left, $right) = explode('.', $number, 2);\r | |
| 64 | \r | |
| 65 | if ($left === '' && $right === '') {\r | |
| 66 | return false;\r | |
| 67 | }\r | |
| 68 | if ($left !== '' && !ctype_digit($left)) {\r | |
| 69 | return false;\r | |
| 70 | }\r | |
| 71 | \r | |
| 72 | $left = ltrim($left, '0');\r | |
| 73 | $right = rtrim($right, '0');\r | |
| 74 | \r | |
| 75 | if ($right === '') {\r | |
| 76 | return $left ? $sign . $left : '0';\r | |
| 77 | } elseif (!ctype_digit($right)) {\r | |
| 78 | return false;\r | |
| 79 | }\r | |
| 80 | return $sign . $left . '.' . $right;\r | |
| 81 | }\r | |
| 82 | }\r | |
| 83 | \r | |
| 84 | // vim: et sw=4 sts=4\r |