move xml helper functions into Util.js and adapt code to use them-- is this where we want to keep them? do we want to keep them? tests need to be written.

git-svn-id: http://svn.openlayers.org/trunk/openlayers@292 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Util.js

@@ -684,3 +684,69 @@ OpenLayers.Util.applyDefaults = function (to, from) {
     }
     return to;
 };
+
+
+
+/** These could/should be made namespace aware?
+*
+* @param {} p
+* @param {str} tagName
+*
+* @return {Array}
+*/
+OpenLayers.Util.getNodes=function(p, tagName) {
+    var nodes = Try.these(
+        function () {
+            return OpenLayers.Util._getNodes(p.documentElement.childNodes,
+                                            tagName);
+        },
+        function () {
+            return OpenLayers.Util._getNodes(p.childNodes, tagName);
+        }
+    );
+    return nodes;
+};
+
+/**
+* @param {Array} nodes
+* @param {str} tagName
+*
+* @return {Array}
+*/
+OpenLayers.Util._getNodes=function(nodes, tagName) {
+    var retArray = new Array();
+    for (var i=0;i<nodes.length;i++) {
+        if (nodes[i].nodeName==tagName) {
+            retArray.push(nodes[i]);
+        }
+    }
+
+    return retArray;
+};
+
+
+
+/**
+* @param {} parent
+* @param {str} item
+* @param {int} index
+*
+* @return {str}
+*/
+OpenLayers.Util.getTagText = function (parent, item, index) {
+    var result = OpenLayers.getNodes(parent, item);
+    if (result && (result.length > 0))
+    {
+        if (!index) {
+            index=0;
+        }
+        if (result[index].childNodes.length > 1) {
+            return result.childNodes[1].nodeValue; 
+        }
+        else if (result[index].childNodes.length == 1) {
+            return result[index].firstChild.nodeValue; 
+        }
+    } else { 
+        return ""; 
+    }
+};