From ffe39d7f3015ded9f31b5f0fac1d9bd0159c5388 Mon Sep 17 00:00:00 2001
From: "Edward Z. Yang" <edwardzyang@thewritingpot.com>
Date: Sun, 27 Aug 2006 00:35:57 +0000
Subject: [PATCH] Basic color keywords translated into hexadecimal values.

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@323 48356398-32a2-884e-a903-53898d9a118a
---
 NEWS                                     |  1 +
 library/HTMLPurifier/AttrDef/Color.php   | 27 ++++++++++++++++++++++++
 tests/HTMLPurifier/AttrDef/ColorTest.php |  3 +++
 3 files changed, 31 insertions(+)

diff --git a/NEWS b/NEWS
index db0ba917..76930cd7 100644
--- a/NEWS
+++ b/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:
diff --git a/library/HTMLPurifier/AttrDef/Color.php b/library/HTMLPurifier/AttrDef/Color.php
index 506be5b8..3948a19c 100644
--- a/library/HTMLPurifier/AttrDef/Color.php
+++ b/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);
diff --git a/tests/HTMLPurifier/AttrDef/ColorTest.php b/tests/HTMLPurifier/AttrDef/ColorTest.php
index 84ddff17..a38c551b 100644
--- a/tests/HTMLPurifier/AttrDef/ColorTest.php
+++ b/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