From f45a286b8d62f710b519a98c7d4b75a0c34d5d10 Mon Sep 17 00:00:00 2001
From: Andrew Dolgov <fox@bah.org.ru>
Date: Mon, 22 Jun 2009 13:56:49 +0400
Subject: strip_tags_long: use htmlpurifier to properly reformat html content

---
 .../library/HTMLPurifier/AttrDef/CSS/Filter.php    | 54 ++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100755 lib/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Filter.php

(limited to 'lib/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Filter.php')

diff --git a/lib/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Filter.php b/lib/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Filter.php
new file mode 100755
index 000000000..147894b86
--- /dev/null
+++ b/lib/htmlpurifier/library/HTMLPurifier/AttrDef/CSS/Filter.php
@@ -0,0 +1,54 @@
+<?php
+
+/**
+ * Microsoft's proprietary filter: CSS property
+ * @note Currently supports the alpha filter. In the future, this will
+ *       probably need an extensible framework
+ */
+class HTMLPurifier_AttrDef_CSS_Filter extends HTMLPurifier_AttrDef
+{
+
+    protected $intValidator;
+
+    public function __construct() {
+        $this->intValidator = new HTMLPurifier_AttrDef_Integer();
+    }
+
+    public function validate($value, $config, $context) {
+        $value = $this->parseCDATA($value);
+        if ($value === 'none') return $value;
+        // if we looped this we could support multiple filters
+        $function_length = strcspn($value, '(');
+        $function = trim(substr($value, 0, $function_length));
+        if ($function !== 'alpha' &&
+            $function !== 'Alpha' &&
+            $function !== 'progid:DXImageTransform.Microsoft.Alpha'
+            ) return false;
+        $cursor = $function_length + 1;
+        $parameters_length = strcspn($value, ')', $cursor);
+        $parameters = substr($value, $cursor, $parameters_length);
+        $params = explode(',', $parameters);
+        $ret_params = array();
+        $lookup = array();
+        foreach ($params as $param) {
+            list($key, $value) = explode('=', $param);
+            $key   = trim($key);
+            $value = trim($value);
+            if (isset($lookup[$key])) continue;
+            if ($key !== 'opacity') continue;
+            $value = $this->intValidator->validate($value, $config, $context);
+            if ($value === false) continue;
+            $int = (int) $value;
+            if ($int > 100) $value = '100';
+            if ($int < 0) $value = '0';
+            $ret_params[] = "$key=$value";
+            $lookup[$key] = true;
+        }
+        $ret_parameters = implode(',', $ret_params);
+        $ret_function = "$function($ret_parameters)";
+        return $ret_function;
+    }
+
+}
+
+// vim: et sw=4 sts=4
-- 
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