Revamp configuration files so that more rules can be added, internal organization is more logical, and descriptions are captured.

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@327 48356398-32a2-884e-a903-53898d9a118a

library/HTMLPurifier/AttrTransform/BdoDir.php

@@ -5,11 +5,14 @@ require_once 'HTMLPurifier/AttrTransform.php';
 // this MUST be placed in post, as it assumes that any value in dir is valid
 
 HTMLPurifier_ConfigDef::define(
-    'Attr', 'DefaultTextDir', 'ltr',
+    'Attr', 'DefaultTextDir', 'ltr', 'string',
     'Defines the default text direction (ltr or rtl) of the document '.
     'being parsed.  This generally is the same as the value of the dir '.
     'attribute in HTML, or ltr if that is not specified.'
 );
+HTMLPurifier_ConfigDef::defineAllowedValues(
+    'Attr', 'DefaultTextDir', array( 'ltr', 'rtl' )
+);
 
 /**
  * Post-trasnform that ensures that bdo tags have the dir attribute set.

library/HTMLPurifier/AttrTransform/ImgRequired.php

@@ -5,7 +5,7 @@ require_once 'HTMLPurifier/AttrTransform.php';
 // must be called POST validation
 
 HTMLPurifier_ConfigDef::define(
-    'Attr', 'DefaultInvalidImage', '',
+    'Attr', 'DefaultInvalidImage', '', 'string',
     'This is the default image an img tag will be pointed to if it does '.
     'not have a valid src attribute.  In future versions, we may allow the '.
     'image tag to be removed completely, but due to design issues, this is '.
@@ -13,7 +13,7 @@ HTMLPurifier_ConfigDef::define(
 );
 
 HTMLPurifier_ConfigDef::define(
-    'Attr', 'DefaultInvalidImageAlt', 'Invalid image',
+    'Attr', 'DefaultInvalidImageAlt', 'Invalid image', 'string',
     'This is the content of the alt tag of an invalid image if the user '.
     'had not previously specified an alt attribute.  It has no effect when the '.
     'image is valid but there was no alt attribute present.'