| 1: | <?php |
| 2: | |
| 3: | /** |
| 4: | * Validates an integer representation of pixels according to the HTML spec. |
| 5: | */ |
| 6: | class HTMLPurifier_AttrDef_HTML_Pixels extends HTMLPurifier_AttrDef |
| 7: | { |
| 8: | |
| 9: | /** |
| 10: | * @type int |
| 11: | */ |
| 12: | protected $max; |
| 13: | |
| 14: | /** |
| 15: | * @param int $max |
| 16: | */ |
| 17: | public function __construct($max = null) |
| 18: | { |
| 19: | $this->max = $max; |
| 20: | } |
| 21: | |
| 22: | /** |
| 23: | * @param string $string |
| 24: | * @param HTMLPurifier_Config $config |
| 25: | * @param HTMLPurifier_Context $context |
| 26: | * @return bool|string |
| 27: | */ |
| 28: | public function validate($string, $config, $context) |
| 29: | { |
| 30: | $string = trim($string); |
| 31: | if ($string === '0') { |
| 32: | return $string; |
| 33: | } |
| 34: | if ($string === '') { |
| 35: | return false; |
| 36: | } |
| 37: | $length = strlen($string); |
| 38: | if (substr($string, $length - 2) == 'px') { |
| 39: | $string = substr($string, 0, $length - 2); |
| 40: | } |
| 41: | if (!is_numeric($string)) { |
| 42: | return false; |
| 43: | } |
| 44: | $int = (int)$string; |
| 45: | |
| 46: | if ($int < 0) { |
| 47: | return '0'; |
| 48: | } |
| 49: | |
| 50: | // upper-bound value, extremely high values can |
| 51: | // crash operating systems, see <http://ha.ckers.org/imagecrash.html> |
| 52: | // WARNING, above link WILL crash you if you're using Windows |
| 53: | |
| 54: | if ($this->max !== null && $int > $this->max) { |
| 55: | return (string)$this->max; |
| 56: | } |
| 57: | return (string)$int; |
| 58: | } |
| 59: | |
| 60: | /** |
| 61: | * @param string $string |
| 62: | * @return HTMLPurifier_AttrDef |
| 63: | */ |
| 64: | public function make($string) |
| 65: | { |
| 66: | if ($string === '') { |
| 67: | $max = null; |
| 68: | } else { |
| 69: | $max = (int)$string; |
| 70: | } |
| 71: | $class = get_class($this); |
| 72: | return new $class($max); |
| 73: | } |
| 74: | } |
| 75: | |
| 76: | // vim: et sw=4 sts=4 |
| 77: |