diff options
Diffstat (limited to 'lib/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Color.php')
-rwxr-xr-x | lib/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Color.php | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/lib/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Color.php b/lib/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Color.php new file mode 100755 index 000000000..14c6594b6 --- /dev/null +++ b/lib/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Color.php @@ -0,0 +1,78 @@ +<?php + +/** + * Validates Color as defined by CSS. + */ +class HTMLPurifier_AttrDef_CSS_Color extends HTMLPurifier_AttrDef +{ + + public function validate($color, $config, $context) { + + static $colors = null; + if ($colors === null) $colors = $config->get('Core', 'ColorKeywords'); + + $color = trim($color); + if ($color === '') return false; + + $lower = strtolower($color); + if (isset($colors[$lower])) return $colors[$lower]; + + if (strpos($color, 'rgb(') !== false) { + // rgb literal handling + $length = strlen($color); + if (strpos($color, ')') !== $length - 1) return false; + $triad = substr($color, 4, $length - 4 - 1); + $parts = explode(',', $triad); + if (count($parts) !== 3) return false; + $type = false; // to ensure that they're all the same type + $new_parts = array(); + foreach ($parts as $part) { + $part = trim($part); + if ($part === '') return false; + $length = strlen($part); + if ($part[$length - 1] === '%') { + // handle percents + if (!$type) { + $type = 'percentage'; + } elseif ($type !== 'percentage') { + return false; + } + $num = (float) substr($part, 0, $length - 1); + if ($num < 0) $num = 0; + if ($num > 100) $num = 100; + $new_parts[] = "$num%"; + } else { + // handle integers + if (!$type) { + $type = 'integer'; + } elseif ($type !== 'integer') { + return false; + } + $num = (int) $part; + if ($num < 0) $num = 0; + if ($num > 255) $num = 255; + $new_parts[] = (string) $num; + } + } + $new_triad = implode(',', $new_parts); + $color = "rgb($new_triad)"; + } else { + // hexadecimal handling + if ($color[0] === '#') { + $hex = substr($color, 1); + } else { + $hex = $color; + $color = '#' . $color; + } + $length = strlen($hex); + if ($length !== 3 && $length !== 6) return false; + if (!ctype_xdigit($hex)) return false; + } + + return $color; + + } + +} + +// vim: et sw=4 sts=4 |