From 49d5791825bfb4293e9daafdb378cc463e49aa5f Mon Sep 17 00:00:00 2001
From: Shannon <sdeminick@gmail.com>
Date: Mon, 28 Oct 2013 12:35:50 +1100
Subject: [PATCH] Adds DescendantsOrSelf extensions on ienumerable to published
 content extensions

---
 src/Umbraco.Web/PublishedContentExtensions.cs | 29 +++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/src/Umbraco.Web/PublishedContentExtensions.cs b/src/Umbraco.Web/PublishedContentExtensions.cs
index 8de72a48bb..b4d07b8baa 100644
--- a/src/Umbraco.Web/PublishedContentExtensions.cs
+++ b/src/Umbraco.Web/PublishedContentExtensions.cs
@@ -1065,6 +1065,35 @@ namespace Umbraco.Web
 
 		#region Axes: descendants, descendants-or-self
 
+        /// <summary>
+        /// Returns all DescendantsOrSelf of all content referenced
+        /// </summary>
+        /// <param name="parentNodes"></param>
+        /// <param name="docTypeAlias"></param>
+        /// <returns></returns>
+        /// <remarks>
+        /// This can be useful in order to return all nodes in an entire site by a type when combined with TypedContentAtRoot
+        /// </remarks>
+        public static IEnumerable<IPublishedContent> DescendantsOrSelf(this IEnumerable<IPublishedContent> parentNodes, string docTypeAlias)
+        {
+            return parentNodes.SelectMany(x => x.DescendantsOrSelf(docTypeAlias));
+        }
+
+        /// <summary>
+        /// Returns all DescendantsOrSelf of all content referenced
+        /// </summary>
+        /// <param name="parentNodes"></param>
+        /// <returns></returns>
+        /// <remarks>
+        /// This can be useful in order to return all nodes in an entire site by a type when combined with TypedContentAtRoot
+        /// </remarks>
+        public static IEnumerable<T> DescendantsOrSelf<T>(this IEnumerable<IPublishedContent> parentNodes)
+            where T : class, IPublishedContent
+        {
+            return parentNodes.SelectMany(x => x.DescendantsOrSelf<T>());
+        } 
+
+
         // as per XPath 1.0 specs §2.2,
         // - the descendant axis contains the descendants of the context node; a descendant is a child or a child of a child and so on; thus
         //   the descendant axis never contains attribute or namespace nodes.