projects / github / wallabag / wallabag.git / blame
| Commit | Line | Data |
|---|---|---|
| d4949327 NL |
1 | <?php\r |
| 2 | \r | |
| 3 | /**\r | |
| 4 | * Validates Color as defined by CSS.\r | |
| 5 | */\r | |
| 6 | class HTMLPurifier_AttrDef_CSS_Color extends HTMLPurifier_AttrDef\r | |
| 7 | {\r | |
| 8 | \r | |
| 9 | /**\r | |
| 10 | * @param string $color\r | |
| 11 | * @param HTMLPurifier_Config $config\r | |
| 12 | * @param HTMLPurifier_Context $context\r | |
| 13 | * @return bool|string\r | |
| 14 | */\r | |
| 15 | public function validate($color, $config, $context)\r | |
| 16 | {\r | |
| 17 | static $colors = null;\r | |
| 18 | if ($colors === null) {\r | |
| 19 | $colors = $config->get('Core.ColorKeywords');\r | |
| 20 | }\r | |
| 21 | \r | |
| 22 | $color = trim($color);\r | |
| 23 | if ($color === '') {\r | |
| 24 | return false;\r | |
| 25 | }\r | |
| 26 | \r | |
| 27 | $lower = strtolower($color);\r | |
| 28 | if (isset($colors[$lower])) {\r | |
| 29 | return $colors[$lower];\r | |
| 30 | }\r | |
| 31 | \r | |
| 32 | if (strpos($color, 'rgb(') !== false) {\r | |
| 33 | // rgb literal handling\r | |
| 34 | $length = strlen($color);\r | |
| 35 | if (strpos($color, ')') !== $length - 1) {\r | |
| 36 | return false;\r | |
| 37 | }\r | |
| 38 | $triad = substr($color, 4, $length - 4 - 1);\r | |
| 39 | $parts = explode(',', $triad);\r | |
| 40 | if (count($parts) !== 3) {\r | |
| 41 | return false;\r | |
| 42 | }\r | |
| 43 | $type = false; // to ensure that they're all the same type\r | |
| 44 | $new_parts = array();\r | |
| 45 | foreach ($parts as $part) {\r | |
| 46 | $part = trim($part);\r | |
| 47 | if ($part === '') {\r | |
| 48 | return false;\r | |
| 49 | }\r | |
| 50 | $length = strlen($part);\r | |
| 51 | if ($part[$length - 1] === '%') {\r | |
| 52 | // handle percents\r | |
| 53 | if (!$type) {\r | |
| 54 | $type = 'percentage';\r | |
| 55 | } elseif ($type !== 'percentage') {\r | |
| 56 | return false;\r | |
| 57 | }\r | |
| 58 | $num = (float)substr($part, 0, $length - 1);\r | |
| 59 | if ($num < 0) {\r | |
| 60 | $num = 0;\r | |
| 61 | }\r | |
| 62 | if ($num > 100) {\r | |
| 63 | $num = 100;\r | |
| 64 | }\r | |
| 65 | $new_parts[] = "$num%";\r | |
| 66 | } else {\r | |
| 67 | // handle integers\r | |
| 68 | if (!$type) {\r | |
| 69 | $type = 'integer';\r | |
| 70 | } elseif ($type !== 'integer') {\r | |
| 71 | return false;\r | |
| 72 | }\r | |
| 73 | $num = (int)$part;\r | |
| 74 | if ($num < 0) {\r | |
| 75 | $num = 0;\r | |
| 76 | }\r | |
| 77 | if ($num > 255) {\r | |
| 78 | $num = 255;\r | |
| 79 | }\r | |
| 80 | $new_parts[] = (string)$num;\r | |
| 81 | }\r | |
| 82 | }\r | |
| 83 | $new_triad = implode(',', $new_parts);\r | |
| 84 | $color = "rgb($new_triad)";\r | |
| 85 | } else {\r | |
| 86 | // hexadecimal handling\r | |
| 87 | if ($color[0] === '#') {\r | |
| 88 | $hex = substr($color, 1);\r | |
| 89 | } else {\r | |
| 90 | $hex = $color;\r | |
| 91 | $color = '#' . $color;\r | |
| 92 | }\r | |
| 93 | $length = strlen($hex);\r | |
| 94 | if ($length !== 3 && $length !== 6) {\r | |
| 95 | return false;\r | |
| 96 | }\r | |
| 97 | if (!ctype_xdigit($hex)) {\r | |
| 98 | return false;\r | |
| 99 | }\r | |
| 100 | }\r | |
| 101 | return $color;\r | |
| 102 | }\r | |
| 103 | }\r | |
| 104 | \r | |
| 105 | // vim: et sw=4 sts=4\r |