From f63514e8ea754e8c0f9a7e181dadc35e7b02b02b Mon Sep 17 00:00:00 2001
From: Stephan <sgay@pilotine.com>
Date: Tue, 11 Jun 2013 09:52:41 +0200
Subject: [PATCH] Web.PublishedCache - add XPathNavigatorIsNavigable to caches

---
 src/Umbraco.Web/PublishedCache/ContextualPublishedCache.cs  | 6 ++++++
 .../PublishedCache/ContextualPublishedCacheOfT.cs           | 6 ++++++
 src/Umbraco.Web/PublishedCache/IPublishedCache.cs           | 6 ++++++
 .../XmlPublishedCache/PublishedContentCache.cs              | 2 ++
 .../PublishedCache/XmlPublishedCache/PublishedMediaCache.cs | 2 ++
 5 files changed, 22 insertions(+)

diff --git a/src/Umbraco.Web/PublishedCache/ContextualPublishedCache.cs b/src/Umbraco.Web/PublishedCache/ContextualPublishedCache.cs
index a4634e5331..b5c3d850d2 100644
--- a/src/Umbraco.Web/PublishedCache/ContextualPublishedCache.cs
+++ b/src/Umbraco.Web/PublishedCache/ContextualPublishedCache.cs
@@ -201,6 +201,12 @@ namespace Umbraco.Web.PublishedCache
         /// <returns>The XPath navigator.</returns>
         public abstract XPathNavigator GetXPathNavigator(bool preview);
 
+        /// <summary>
+        /// Gets a value indicating whether <c>GetXPathNavigator</c> returns an <c>XPathNavigator</c>
+        /// and that navigator is a <c>NavigableNavigator</c>.
+        /// </summary>
+        public abstract bool XPathNavigatorIsNavigable { get; }
+
         /// <summary>
         /// Gets a value indicating whether the underlying non-contextual cache contains content.
         /// </summary>
diff --git a/src/Umbraco.Web/PublishedCache/ContextualPublishedCacheOfT.cs b/src/Umbraco.Web/PublishedCache/ContextualPublishedCacheOfT.cs
index 9e221cbb1a..d759153419 100644
--- a/src/Umbraco.Web/PublishedCache/ContextualPublishedCacheOfT.cs
+++ b/src/Umbraco.Web/PublishedCache/ContextualPublishedCacheOfT.cs
@@ -132,6 +132,12 @@ namespace Umbraco.Web.PublishedCache
             return _cache.GetXPathNavigator(UmbracoContext, preview);
         }
 
+         /// <summary>
+        /// Gets a value indicating whether <c>GetXPathNavigator</c> returns an <c>XPathNavigator</c>
+        /// and that navigator is a <c>NavigableNavigator</c>.
+        /// </summary>
+        public override bool XPathNavigatorIsNavigable { get { return _cache.XPathNavigatorIsNavigable; } }
+
         /// <summary>
         /// Gets a value indicating whether the underlying non-contextual cache contains content.
         /// </summary>
diff --git a/src/Umbraco.Web/PublishedCache/IPublishedCache.cs b/src/Umbraco.Web/PublishedCache/IPublishedCache.cs
index 16986f0148..a900689350 100644
--- a/src/Umbraco.Web/PublishedCache/IPublishedCache.cs
+++ b/src/Umbraco.Web/PublishedCache/IPublishedCache.cs
@@ -88,6 +88,12 @@ namespace Umbraco.Web.PublishedCache
         /// <remarks>The value of <paramref name="preview"/> overrides the context.</remarks>
         XPathNavigator GetXPathNavigator(UmbracoContext umbracoContext, bool preview);
 
+        /// <summary>
+        /// Gets a value indicating whether <c>GetXPathNavigator</c> returns an <c>XPathNavigator</c>
+        /// and that navigator is a <c>NavigableNavigator</c>.
+        /// </summary>
+        bool XPathNavigatorIsNavigable { get; }
+
         /// <summary>
         /// Gets a value indicating whether the cache contains published content.
         /// </summary>
diff --git a/src/Umbraco.Web/PublishedCache/XmlPublishedCache/PublishedContentCache.cs b/src/Umbraco.Web/PublishedCache/XmlPublishedCache/PublishedContentCache.cs
index df143ed8e3..6b82f278be 100644
--- a/src/Umbraco.Web/PublishedCache/XmlPublishedCache/PublishedContentCache.cs
+++ b/src/Umbraco.Web/PublishedCache/XmlPublishedCache/PublishedContentCache.cs
@@ -320,6 +320,8 @@ namespace Umbraco.Web.PublishedCache.XmlPublishedCache
             return xml.CreateNavigator();
         }
 
+        public virtual bool XPathNavigatorIsNavigable { get { return false; } }
+
         #endregion
 
         #region Legacy Xml
diff --git a/src/Umbraco.Web/PublishedCache/XmlPublishedCache/PublishedMediaCache.cs b/src/Umbraco.Web/PublishedCache/XmlPublishedCache/PublishedMediaCache.cs
index c0f156de87..03c44f34c9 100644
--- a/src/Umbraco.Web/PublishedCache/XmlPublishedCache/PublishedMediaCache.cs
+++ b/src/Umbraco.Web/PublishedCache/XmlPublishedCache/PublishedMediaCache.cs
@@ -92,6 +92,8 @@ namespace Umbraco.Web.PublishedCache.XmlPublishedCache
             throw new NotImplementedException("PublishedMediaCache does not support XPath.");
         }
 
+        public bool XPathNavigatorIsNavigable { get { return false; } }
+
         public virtual bool HasContent(UmbracoContext context, bool preview) { throw new NotImplementedException(); }
 
         private ExamineManager GetExamineManagerSafe()