Basic color keywords translated into hexadecimal values.

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@323 48356398-32a2-884e-a903-53898d9a118a

NEWS

@@ -6,6 +6,7 @@ NEWS ( CHANGELOG and HISTORY )                                     HTMLPurifier
 - Malformed UTF-8 and non-SGML character detection and cleaning implemented
 - API documentation completed
 - Shorthand CSS properties implemented: font
+- Basic color keywords translated into hexadecimal values
 
 1.0.0beta, released 2006-08-16
 - First public release, most functionality implemented. Notable omissions are:

library/HTMLPurifier/AttrDef/Color.php

@@ -8,11 +8,38 @@ require_once 'HTMLPurifier/AttrDef.php';
 class HTMLPurifier_AttrDef_Color extends HTMLPurifier_AttrDef
 {
     
+    /**
+     * Color keyword lookup table.
+     * @todo Extend it to include all usually allowed colors.
+     */
+    var $colors = array(
+        'maroon'    => '#800000',
+        'red'       => '#F00',
+        'orange'    => '#FFA500',
+        'yellow'    => '#FF0',
+        'olive'     => '#808000',
+        'purple'    => '#800080',
+        'fuchsia'   => '#F0F',
+        'white'     => '#FFF',
+        'lime'      => '#0F0',
+        'green'     => '#008000',
+        'navy'      => '#000080',
+        'blue'      => '#00F',
+        'aqua'      => '#0FF',
+        'teal'      => '#008080',
+        'black'     => '#000',
+        'silver'    => '#C0C0C0',
+        'gray'      => '#808080'
+    );
+    
     function validate($color, $config, &$context) {
         
         $color = trim($color);
         if (!$color) return false;
         
+        $lower = strtolower($color);
+        if (isset($this->colors[$lower])) return $this->colors[$lower];
+        
         if ($color[0] === '#') {
             // hexadecimal handling
             $hex = substr($color, 1);

tests/HTMLPurifier/AttrDef/ColorTest.php

@@ -23,6 +23,9 @@ class HTMLPurifier_AttrDef_ColorTest extends HTMLPurifier_AttrDefHarness
         $this->assertDef('rgb(200%, -10%, 0%)', 'rgb(100%,0%,0%)');
         $this->assertDef('rgb(256,-23,34)', 'rgb(255,0,34)');
         
+        // color keywords, of course
+        $this->assertDef('red', '#F00');
+        
         // maybe hex transformations would be another nice feature
         // at the very least transform rgb percent to rgb integer