[1.6.1] Implement BoolToCSS attribute transformations for td,th.nowrap and hr.noshade

- Implement CSS property white-space:nowrap;
- Update TODO with more ambitious goal: all transforms by 1.6.1

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1012 48356398-32a2-884e-a903-53898d9a118a

library/HTMLPurifier/AttrTransform/BoolToCSS.php

@@ -0,0 +1,42 @@
+<?php
+
+require_once 'HTMLPurifier/AttrTransform.php';
+
+/**
+ * Pre-transform that changes converts a boolean attribute to fixed CSS
+ */
+class HTMLPurifier_AttrTransform_BoolToCSS
+extends HTMLPurifier_AttrTransform {
+    
+    /**
+     * Name of boolean attribute that is trigger
+     */
+    var $attr;
+    
+    /**
+     * CSS declarations to add to style, needs trailing semicolon
+     */
+    var $css;
+    
+    /**
+     * @param $attr string attribute name to convert from
+     * @param $css string CSS declarations to add to style (needs semicolon)
+     */
+    function HTMLPurifier_AttrTransform_BoolToCSS($attr, $css) {
+        $this->attr = $attr;
+        $this->css  = $css;
+    }
+    
+    function transform($attr, $config, &$context) {
+        
+        if (!isset($attr[$this->attr])) return $attr;
+        unset($attr[$this->attr]);
+        if (!isset($attr['style'])) $attr['style'] = '';
+        $attr['style'] = $this->css . $attr['style'];
+        return $attr;
+        
+    }
+    
+}
+
+?>