From a5bb4632e5ea0170040b560f8648e2688da3f1c8 Mon Sep 17 00:00:00 2001
From: Tom Payne <twpayne@gmail.com>
Date: Tue, 4 Feb 2014 15:39:28 +0100
Subject: [PATCH] Add ol.xml.isDocument

---
 src/ol/xml.js | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/src/ol/xml.js b/src/ol/xml.js
index 908b2e9516..6621186839 100644
--- a/src/ol/xml.js
+++ b/src/ol/xml.js
@@ -4,6 +4,7 @@ goog.require('goog.array');
 goog.require('goog.asserts');
 goog.require('goog.dom.NodeType');
 goog.require('goog.object');
+goog.require('goog.userAgent');
 
 
 /**
@@ -48,6 +49,34 @@ ol.xml.getAllTextContent_ = function(node, normalizeWhitespace, accumulator) {
 };
 
 
+/**
+ * @param {?} value Value.
+ * @private
+ * @return {boolean} Is document.
+ */
+ol.xml.isDocument_ = function(value) {
+  return value instanceof Document;
+};
+
+
+/**
+ * @param {?} value Value.
+ * @private
+ * @return {boolean} Is document.
+ */
+ol.xml.isDocumentIE_ = function(value) {
+  return goog.isObject(value) && value.nodeType == goog.dom.NodeType.DOCUMENT;
+};
+
+
+/**
+ * @param {?} value Value.
+ * @return {boolean} Is document.
+ */
+ol.xml.isDocument = goog.userAgent.IE ?
+    ol.xml.isDocumentIE_ : ol.xml.isDocument_;
+
+
 /**
  * @param {string} xml XML.
  * @return {Document} Document.