From c6a7dd235d9129c269a2e3a69efaebf3a3af02c1 Mon Sep 17 00:00:00 2001
From: crschmidt <crschmidt@crschmidt.net>
Date: Wed, 18 Mar 2009 18:15:47 +0000
Subject: [PATCH] Add ExtendedData support to KML. r=tschaub, patch mine + his
 comments, thx to rdewit for initial help/pointers, (Closes #1955)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@9089 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
---
 lib/OpenLayers/Format/KML.js | 33 ++++++++++++++++++++++
 tests/Format/KML.html        | 53 ++++++++++++++++++++++++++++++++++++
 2 files changed, 86 insertions(+)
diff --git a/lib/OpenLayers/Format/KML.js b/lib/OpenLayers/Format/KML.js
index 6e6b22bbf9..3985162c26 100644
--- a/lib/OpenLayers/Format/KML.js
+++ b/lib/OpenLayers/Format/KML.js
@@ -840,9 +840,17 @@ OpenLayers.Format.KML = OpenLayers.Class(OpenLayers.Format.XML, {
      */
     parseAttributes: function(node) {
         var attributes = {};
+       
+        // Extended Data is parsed first.
+        var edNodes = node.getElementsByTagName("ExtendedData");
+        if (edNodes.length) {
+            attributes = this.parseExtendedData(edNodes[0]);
+        }
+        
         // assume attribute nodes are type 1 children with a type 3 or 4 child
         var child, grandchildren, grandchild;
         var children = node.childNodes;
+
         for(var i=0, len=children.length; i<len; ++i) {
             child = children[i];
             if(child.nodeType == 1) {
@@ -874,6 +882,31 @@ OpenLayers.Format.KML = OpenLayers.Class(OpenLayers.Format.XML, {
         return attributes;
     },
 
+    /**
+     * Method: parseExtendedData
+     * Parse ExtendedData from KML. No support for schemas/datatypes.
+     *     See http://code.google.com/apis/kml/documentation/kmlreference.html#extendeddata
+     *     for more information on extendeddata.
+     */
+    parseExtendedData: function(node) {
+        var attributes = {};
+        var dataNodes = node.getElementsByTagName("Data");
+        for (var i = 0, len = dataNodes.length; i < len; i++) {
+            var data = dataNodes[i];
+            var key = data.getAttribute("name");
+            var ed = {};
+            var valueNode = data.getElementsByTagName("value");
+            if (valueNode.length) {
+                ed['value'] = this.concatChildValues(valueNode[0]);
+            }    
+            var nameNode = data.getElementsByTagName("displayName");
+            if (nameNode.length) {
+                ed['displayName'] = this.concatChildValues(nameNode[0]);
+            }
+            attributes[key] = ed;
+        }
+        return attributes;    
+    },
     
     /**
      * Method: parseProperty
diff --git a/tests/Format/KML.html b/tests/Format/KML.html
index 0b123d4326..eb28f64b7a 100644
--- a/tests/Format/KML.html
+++ b/tests/Format/KML.html
@@ -152,9 +152,62 @@
         gotStyle.t = false;
         t.ok(style.t, "getStyle returns copy of style rather than reference");
     }
+    function test_Format_KML_extendedData(t) {
+        t.plan(2);
+        var f = new OpenLayers.Format.KML();
+        var features = f.read(OpenLayers.Util.getElement("kml_extendeddata").value);
+        t.eq(features[0].attributes.all_bridges.value, "3030", "read value from extendeddata correctly.");
+        t.eq(features[0].attributes.all_bridges.displayName, "all bridges", "read displayName from extendeddata correctly.");
+    }
 
     </script> 
 </head> 
 <body> 
+    <textarea id="kml_extendeddata" style="display:none">
+<kml xmlns="http://earth.google.com/kml/2.2">
+<Document>
+        <Placemark>
+            <styleUrl>#default</styleUrl>
+
+
+
+
+            <ExtendedData>
+                                    <Data name='all_bridges'>
+                        <displayName><![CDATA[all bridges]]></displayName>
+                        <value><![CDATA[3030]]></value>
+                    </Data>
+                                    <Data name='latitude'>
+                        <displayName><![CDATA[latitude]]></displayName>
+                        <value><![CDATA[43]]></value>
+                    </Data>
+                                    <Data name='longitude'>
+                        <displayName><![CDATA[longitude]]></displayName>
+                        <value><![CDATA[-107.55]]></value>
+                    </Data>
+                                    <Data name='functionally_obsolete__percent'>
+                        <displayName><![CDATA[functionally obsolete, percent]]></displayName>
+                        <value><![CDATA[8]]></value>
+                    </Data>
+                                    <Data name='structurally_deficient__percent'>
+                        <displayName><![CDATA[structurally deficient, percent]]></displayName>
+                        <value><![CDATA[13]]></value>
+                    </Data>
+                                    <Data name='state'>
+                        <displayName><![CDATA[state]]></displayName>
+                        <value><![CDATA[Wyoming]]></value>
+                    </Data>
+                            </ExtendedData>
+
+
+              <Point>
+<coordinates>-107.55,43.0</coordinates>
+</Point>
+
+
+        </Placemark>
+</Document>
+</kml>
+</textarea>
 </body> 
 </html> 
