projects / weblabels.fsf.org.git / blame
| Commit | Line | Data |
|---|---|---|
| 7f254ad8 AE |
1 | <?php\r |
| 2 | \r | |
| 3 | /* W3C says:\r | |
| 4 | [ // adjective and number must be in correct order, even if\r | |
| 5 | // you could switch them without introducing ambiguity.\r | |
| 6 | // some browsers support that syntax\r | |
| 7 | [\r | |
| 8 | <percentage> | <length> | left | center | right\r | |
| 9 | ]\r | |
| 10 | [\r | |
| 11 | <percentage> | <length> | top | center | bottom\r | |
| 12 | ]?\r | |
| 13 | ] |\r | |
| 14 | [ // this signifies that the vertical and horizontal adjectives\r | |
| 15 | // can be arbitrarily ordered, however, there can only be two,\r | |
| 16 | // one of each, or none at all\r | |
| 17 | [\r | |
| 18 | left | center | right\r | |
| 19 | ] ||\r | |
| 20 | [\r | |
| 21 | top | center | bottom\r | |
| 22 | ]\r | |
| 23 | ]\r | |
| 24 | top, left = 0%\r | |
| 25 | center, (none) = 50%\r | |
| 26 | bottom, right = 100%\r | |
| 27 | */\r | |
| 28 | \r | |
| 29 | /* QuirksMode says:\r | |
| 30 | keyword + length/percentage must be ordered correctly, as per W3C\r | |
| 31 | \r | |
| 32 | Internet Explorer and Opera, however, support arbitrary ordering. We\r | |
| 33 | should fix it up.\r | |
| 34 | \r | |
| 35 | Minor issue though, not strictly necessary.\r | |
| 36 | */\r | |
| 37 | \r | |
| 38 | // control freaks may appreciate the ability to convert these to\r | |
| 39 | // percentages or something, but it's not necessary\r | |
| 40 | \r | |
| 41 | /**\r | |
| 42 | * Validates the value of background-position.\r | |
| 43 | */\r | |
| 44 | class HTMLPurifier_AttrDef_CSS_BackgroundPosition extends HTMLPurifier_AttrDef\r | |
| 45 | {\r | |
| 46 | \r | |
| 47 | protected $length;\r | |
| 48 | protected $percentage;\r | |
| 49 | \r | |
| 50 | public function __construct() {\r | |
| 51 | $this->length = new HTMLPurifier_AttrDef_CSS_Length();\r | |
| 52 | $this->percentage = new HTMLPurifier_AttrDef_CSS_Percentage();\r | |
| 53 | }\r | |
| 54 | \r | |
| 55 | public function validate($string, $config, $context) {\r | |
| 56 | $string = $this->parseCDATA($string);\r | |
| 57 | $bits = explode(' ', $string);\r | |
| 58 | \r | |
| 59 | $keywords = array();\r | |
| 60 | $keywords['h'] = false; // left, right\r | |
| 61 | $keywords['v'] = false; // top, bottom\r | |
| 62 | $keywords['ch'] = false; // center (first word)\r | |
| 63 | $keywords['cv'] = false; // center (second word)\r | |
| 64 | $measures = array();\r | |
| 65 | \r | |
| 66 | $i = 0;\r | |
| 67 | \r | |
| 68 | $lookup = array(\r | |
| 69 | 'top' => 'v',\r | |
| 70 | 'bottom' => 'v',\r | |
| 71 | 'left' => 'h',\r | |
| 72 | 'right' => 'h',\r | |
| 73 | 'center' => 'c'\r | |
| 74 | );\r | |
| 75 | \r | |
| 76 | foreach ($bits as $bit) {\r | |
| 77 | if ($bit === '') continue;\r | |
| 78 | \r | |
| 79 | // test for keyword\r | |
| 80 | $lbit = ctype_lower($bit) ? $bit : strtolower($bit);\r | |
| 81 | if (isset($lookup[$lbit])) {\r | |
| 82 | $status = $lookup[$lbit];\r | |
| 83 | if ($status == 'c') {\r | |
| 84 | if ($i == 0) {\r | |
| 85 | $status = 'ch';\r | |
| 86 | } else {\r | |
| 87 | $status = 'cv';\r | |
| 88 | }\r | |
| 89 | }\r | |
| 90 | $keywords[$status] = $lbit;\r | |
| 91 | $i++;\r | |
| 92 | }\r | |
| 93 | \r | |
| 94 | // test for length\r | |
| 95 | $r = $this->length->validate($bit, $config, $context);\r | |
| 96 | if ($r !== false) {\r | |
| 97 | $measures[] = $r;\r | |
| 98 | $i++;\r | |
| 99 | }\r | |
| 100 | \r | |
| 101 | // test for percentage\r | |
| 102 | $r = $this->percentage->validate($bit, $config, $context);\r | |
| 103 | if ($r !== false) {\r | |
| 104 | $measures[] = $r;\r | |
| 105 | $i++;\r | |
| 106 | }\r | |
| 107 | \r | |
| 108 | }\r | |
| 109 | \r | |
| 110 | if (!$i) return false; // no valid values were caught\r | |
| 111 | \r | |
| 112 | $ret = array();\r | |
| 113 | \r | |
| 114 | // first keyword\r | |
| 115 | if ($keywords['h']) $ret[] = $keywords['h'];\r | |
| 116 | elseif ($keywords['ch']) {\r | |
| 117 | $ret[] = $keywords['ch'];\r | |
| 118 | $keywords['cv'] = false; // prevent re-use: center = center center\r | |
| 119 | }\r | |
| 120 | elseif (count($measures)) $ret[] = array_shift($measures);\r | |
| 121 | \r | |
| 122 | if ($keywords['v']) $ret[] = $keywords['v'];\r | |
| 123 | elseif ($keywords['cv']) $ret[] = $keywords['cv'];\r | |
| 124 | elseif (count($measures)) $ret[] = array_shift($measures);\r | |
| 125 | \r | |
| 126 | if (empty($ret)) return false;\r | |
| 127 | return implode(' ', $ret);\r | |
| 128 | \r | |
| 129 | }\r | |
| 130 | \r | |
| 131 | }\r | |
| 132 | \r | |
| 133 | // vim: et sw=4 sts=4\r |