Implement 'overflow' CSS property.

Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>

INSTALL

@@ -18,8 +18,6 @@ with these contents.
 HTML Purifier is PHP 5 only, and is actively tested from PHP 5.0.5 and 
 up. It has no core dependencies with other libraries. PHP 
 4 support was deprecated on December 31, 2007 with HTML Purifier 3.0.0. 
-Essential security fixes will be issued for the 2.1.x branch until 
-August 8, 2008. 
 
 These optional extensions can enhance the capabilities of HTML Purifier:
 

NEWS

@@ -10,6 +10,7 @@ NEWS ( CHANGELOG and HISTORY )                                     HTMLPurifier
 ==========================
 
 3.3.0, unknown release date
+! Implement CSS property 'overflow' when %CSS.AllowTricky is true.
 - Fix bug with testEncodingSupportsASCII() algorithm when iconv() implementation
   does not do the "right thing" with characters not supported in the output
   set.

configdoc/usage.xml

@@ -38,7 +38,7 @@
  </directive>
  <directive id="CSS.AllowedProperties">
   <file name="HTMLPurifier/CSSDefinition.php">
-   <line>274</line>
+   <line>275</line>
   </file>
  </directive>
  <directive id="Cache.DefinitionImpl">

library/HTMLPurifier/CSSDefinition.php

@@ -257,6 +257,7 @@ class HTMLPurifier_CSSDefinition extends HTMLPurifier_Definition
         $this->info['visibility'] = new HTMLPurifier_AttrDef_Enum(array(
             'visible', 'hidden', 'collapse'
         ));
+        $this->info['overflow'] = new HTMLPurifier_AttrDef_Enum(array('visible', 'hidden', 'auto', 'scroll'));
     }
     
     

tests/HTMLPurifier/AttrDef/CSSTest.php

@@ -141,6 +141,7 @@ class HTMLPurifier_AttrDef_CSSTest extends HTMLPurifier_AttrDefHarness
         $this->config->set('CSS', 'AllowTricky', true);
         $this->assertDef('display:none;');
         $this->assertDef('visibility:visible;');
+        $this->assertDef('overflow:scroll;');
     }
     
 }