diff options
Diffstat (limited to 'inc/3rdparty/htmlpurifier/HTMLPurifier/AttrDef/Lang.php')
| -rw-r--r-- | inc/3rdparty/htmlpurifier/HTMLPurifier/AttrDef/Lang.php | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/inc/3rdparty/htmlpurifier/HTMLPurifier/AttrDef/Lang.php b/inc/3rdparty/htmlpurifier/HTMLPurifier/AttrDef/Lang.php new file mode 100644 index 00000000..6ad0f799 --- /dev/null +++ b/inc/3rdparty/htmlpurifier/HTMLPurifier/AttrDef/Lang.php | |||
| @@ -0,0 +1,86 @@ | |||
| 1 | <?php | ||
| 2 | |||
| 3 | /** | ||
| 4 | * Validates the HTML attribute lang, effectively a language code. | ||
| 5 | * @note Built according to RFC 3066, which obsoleted RFC 1766 | ||
| 6 | */ | ||
| 7 | class HTMLPurifier_AttrDef_Lang extends HTMLPurifier_AttrDef | ||
| 8 | { | ||
| 9 | |||
| 10 | /** | ||
| 11 | * @param string $string | ||
| 12 | * @param HTMLPurifier_Config $config | ||
| 13 | * @param HTMLPurifier_Context $context | ||
| 14 | * @return bool|string | ||
| 15 | */ | ||
| 16 | public function validate($string, $config, $context) | ||
| 17 | { | ||
| 18 | $string = trim($string); | ||
| 19 | if (!$string) { | ||
| 20 | return false; | ||
| 21 | } | ||
| 22 | |||
| 23 | $subtags = explode('-', $string); | ||
| 24 | $num_subtags = count($subtags); | ||
| 25 | |||
| 26 | if ($num_subtags == 0) { // sanity check | ||
| 27 | return false; | ||
| 28 | } | ||
| 29 | |||
| 30 | // process primary subtag : $subtags[0] | ||
| 31 | $length = strlen($subtags[0]); | ||
| 32 | switch ($length) { | ||
| 33 | case 0: | ||
| 34 | return false; | ||
| 35 | case 1: | ||
| 36 | if (!($subtags[0] == 'x' || $subtags[0] == 'i')) { | ||
| 37 | return false; | ||
| 38 | } | ||
| 39 | break; | ||
| 40 | case 2: | ||
| 41 | case 3: | ||
| 42 | if (!ctype_alpha($subtags[0])) { | ||
| 43 | return false; | ||
| 44 | } elseif (!ctype_lower($subtags[0])) { | ||
| 45 | $subtags[0] = strtolower($subtags[0]); | ||
| 46 | } | ||
| 47 | break; | ||
| 48 | default: | ||
| 49 | return false; | ||
| 50 | } | ||
| 51 | |||
| 52 | $new_string = $subtags[0]; | ||
| 53 | if ($num_subtags == 1) { | ||
| 54 | return $new_string; | ||
| 55 | } | ||
| 56 | |||
| 57 | // process second subtag : $subtags[1] | ||
| 58 | $length = strlen($subtags[1]); | ||
| 59 | if ($length == 0 || ($length == 1 && $subtags[1] != 'x') || $length > 8 || !ctype_alnum($subtags[1])) { | ||
| 60 | return $new_string; | ||
| 61 | } | ||
| 62 | if (!ctype_lower($subtags[1])) { | ||
| 63 | $subtags[1] = strtolower($subtags[1]); | ||
| 64 | } | ||
| 65 | |||
| 66 | $new_string .= '-' . $subtags[1]; | ||
| 67 | if ($num_subtags == 2) { | ||
| 68 | return $new_string; | ||
| 69 | } | ||
| 70 | |||
| 71 | // process all other subtags, index 2 and up | ||
| 72 | for ($i = 2; $i < $num_subtags; $i++) { | ||
| 73 | $length = strlen($subtags[$i]); | ||
| 74 | if ($length == 0 || $length > 8 || !ctype_alnum($subtags[$i])) { | ||
| 75 | return $new_string; | ||
| 76 | } | ||
| 77 | if (!ctype_lower($subtags[$i])) { | ||
| 78 | $subtags[$i] = strtolower($subtags[$i]); | ||
| 79 | } | ||
| 80 | $new_string .= '-' . $subtags[$i]; | ||
| 81 | } | ||
| 82 | return $new_string; | ||
| 83 | } | ||
| 84 | } | ||
| 85 | |||
| 86 | // vim: et sw=4 sts=4 | ||