[1.3.0] Refactored ChildDef classes into their own files

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@558 48356398-32a2-884e-a903-53898d9a118a

library/HTMLPurifier/ChildDef/Chameleon.php

@@ -0,0 +1,55 @@
+<?php
+
+require_once 'HTMLPurifier/ChildDef.php';
+
+/**
+ * Definition that uses different definitions depending on context.
+ * 
+ * The del and ins tags are notable because they allow different types of
+ * elements depending on whether or not they're in a block or inline context.
+ * Chameleon allows this behavior to happen by using two different
+ * definitions depending on context.  While this somewhat generalized,
+ * it is specifically intended for those two tags.
+ */
+class HTMLPurifier_ChildDef_Chameleon extends HTMLPurifier_ChildDef
+{
+    
+    /**
+     * Instance of the definition object to use when inline. Usually stricter.
+     */
+    var $inline;
+    /**
+     * Instance of the definition object to use when block.
+     */
+    var $block;
+    
+    /**
+     * @param $inline List of elements to allow when inline.
+     * @param $block List of elements to allow when block.
+     */
+    function HTMLPurifier_ChildDef_Chameleon($inline, $block) {
+        $this->inline = new HTMLPurifier_ChildDef_Optional($inline);
+        $this->block  = new HTMLPurifier_ChildDef_Optional($block);
+    }
+    
+    function validateChildren($tokens_of_children, $config, &$context) {
+        $parent_type = $context->get('ParentType');
+        switch ($parent_type) {
+            case 'unknown':
+            case 'inline':
+                $result = $this->inline->validateChildren(
+                    $tokens_of_children, $config, $context);
+                break;
+            case 'block':
+                $result = $this->block->validateChildren(
+                    $tokens_of_children, $config, $context);
+                break;
+            default:
+                trigger_error('Invalid context', E_USER_ERROR);
+                return false;
+        }
+        return $result;
+    }
+}
+
+?>