Changeset 3319

Timestamp:

06/11/07 18:42:37 (1 year ago)

Author:

tschaub

Message:

get rid of cruft in Format/XML.js - flesh out read/write support for GeoRSS

Files:

• sandbox/tschaub/xml/examples/vector-formats.html (modified) (1 diff)
• sandbox/tschaub/xml/lib/OpenLayers/Format/GeoRSS.js (modified) (3 diffs)
• sandbox/tschaub/xml/lib/OpenLayers/Format/XML.js (modified) (4 diffs)

sandbox/tschaub/xml/examples/vector-formats.html

@@ -117 +117 @@
-                element.value = features.length + ' feature' + plural + ' added'
-            } else {
-'
+ ' + type
-            }
-        }

sandbox/tschaub/xml/lib/OpenLayers/Format/GeoRSS.js

@@ -18 +18 @@
-    
-    /**
+     * Return a list of features from a GeoRSS doc
+     * @param {Element} data
+     * @type Array(OpenLayers.Feature.Vector)
+     */
+    read: function(doc) {
+        if (typeof doc == "string") { 
+            doc = OpenLayers.Format.XML.prototype.read.apply(this, [doc]);
+        }
+
+        /* Try RSS items first, then Atom entries */
+        var itemlist = null;
+        itemlist = this.getElementsByTagNameNS(doc, '*', 'item');
+        if (itemlist.length == 0) {
+            itemlist = this.getElementsByTagNameNS(doc, '*', 'entry');
+        }
+        
+        var features = [];
+        for(var i=0; i<itemlist.length; i++) {
+            // this is horrendous - please change this
+            var point = OpenLayers.Util.getNodes(itemlist[i], 'georss:point');
+            var lat = OpenLayers.Util.getNodes(itemlist[i], 'geo:lat');
+            var lon = OpenLayers.Util.getNodes(itemlist[i], 'geo:long');
+            if (point.length > 0) {
+                var location = point[0].firstChild.nodeValue.trim().split(/\s+/);
+                
+                if (location.length !=2) {
+                    var location = point[0].firstChild.nodeValue.trim().split(/\s*,\s*/);
+                }
+            } else if (lat.length > 0 && lon.length > 0) {
+                var location = [parseFloat(lat[0].firstChild.nodeValue), parseFloat(lon[0].firstChild.nodeValue)];
+            } else {
+                continue;
+            }
+            var geometry = new OpenLayers.Geometry.Point(parseFloat(location[1]),
+                                                         parseFloat(location[0]));
+
+            /* Provide defaults for title and description */
+            var title = "Untitled";
+            try {
+                title = OpenLayers.Util.getNodes(itemlist[i], 
+                        "title")[0].firstChild.nodeValue;
+            }
+            catch (e) { title="Untitled"; }
+           
+            /* First try RSS descriptions, then Atom summaries */
+            var descr_nodes = this.getElementsByTagNameNS(itemlist[i],
+                                                          "*",
+                                                          "description");
+            if (descr_nodes.length == 0) {
+                descr_nodes = this.getElementsByTagNameNS(itemlist[i],
+                                                          "*",
+                                                          "summary");
+            }
+            var description = "No description.";
+            try {
+              description = descr_nodes[0].firstChild.nodeValue;
+            }
+            catch (e) { description="No description."; }
+
+            /* If no link URL is found in the first child node, try the
+               href attribute */
+            try {
+                var link = OpenLayers.Util.getNodes(itemlist[i], "link")[0].firstChild.nodeValue;
+            } 
+            catch (e) {
+                try {
+                    var link = OpenLayers.Util.getNodes(itemlist[i], "link")[0].getAttribute("href");
+                }
+                catch (e) {}
+            }
+            
+            var data = {
+                "title": title,
+                "description": description,
+                "link": link
+            };
+            features.push(new OpenLayers.Feature.Vector(geometry, data));
+        }
+        return features;
+    },
+    
+    /**
-     * Accept Feature Collection, and return a string. 
-     * 
-     * @param {Array} List of features to serialize into a string.
-     */
- 
+
-        var georss;
-        if(features instanceof Array) {
@@ -35 +117 @@
-        return OpenLayers.Format.XML.prototype.write.apply(this, [georss]);
-     },
-
+
-    /** 
-     * Accept an OpenLayers.Feature.Vector, and build a geometry for it.
@@ -74 +156 @@
-        // match MultiPolygon or Polygon
-        if (geometry.CLASS_NAME == "OpenLayers.Geometry.Polygon") {
-    
-    
-    
-    
+
+
+
+
-        // match MultiLineString or LineString
-        else if (geometry.CLASS_NAME == "OpenLayers.Geometry.LineString") {
-         
-         
-         
-         
+
+
+
+
-        // match MultiPoint or Point
-        else if (geometry.CLASS_NAME == "OpenLayers.Geometry.Point") {
-    
-    
+
+
-        } else {    
-
+  
-        }  
-        return gml;         

sandbox/tschaub/xml/lib/OpenLayers/Format/XML.js

@@ -88 +88 @@
-    write: function(node, namespaces) {
-        var data;
-
+
+
+
-            var serializer = new XMLSerializer();
-            data = serializer.serializeToString(node);
-        } else if(this.xmldom) {
-            data = node.xml;
-        } else {
-            var pieces = [];
-            namespaces = (!!namespaces) ? namespaces : {};
-            if(node.nodeType == 1) {
-                var name = node.nodeName;
-                var prefix = node._prefix;
-                if(prefix) {
-                    name = prefix + ":" + name;
-                }
-                pieces.push("<" + name);
-                for(var i=0; i<node.attributes.length; ++i) {
-                    var attribute = node.attributes[i];
-                    if(attribute.specified && attribute.nodeName.indexOf("_") != 0) {
-                        pieces.push(" " + attribute.nodeName + '="' +
-                                    attribute.nodeValue + '"');
-                    }
-                }
-                var uri = node._namespaceURI;
-                if(uri) {
-                    var index = name.indexOf(":");
-                    if(index > -1) {
-                        var prefix = name.substring(0, index);
-                        if(!namespaces[prefix]) {
-                            namespaces[prefix] = uri;
-                            pieces.push(" xmlns:" + prefix + '="' + uri + '"');
-                        }
-                    }
-                }
-                if(node.firstChild) {
-                    pieces.push(">");
-                    for(var child = node.firstChild; child; child = child.nextSibling) {
-                        var p = OpenLayers.Format.XML.prototype.write.apply(this,
-                                                            [child, namespaces]);
-                        pieces.push(p);
-                    }
-                    pieces.push("</" + name + ">");
-                }
-                else {
-                    pieces.push("/>");
-                }
-            }
-            else if(node.nodeType == 3) {
-                pieces.push(node.nodeValue);
-            }
-            data = pieces.join('');
-        }
-        return data;
@@ -153 +108 @@
-    createElementNS: function(uri, name) {
-        var element;
-
+
+
+
-            element = document.createElementNS(uri, name);
-        } else {
-            var prefix, localName;
-            var index = name.indexOf(":");
-            if(index > -1) {
-                prefix = name.substring(0, index);
-                localName = name.substring(index + 1);
-            }
-            if(this.xmldom) {
-                element = this.xmldom.createNode(1, name, uri);
-            } else {
-                if(prefix) {
-                    element = document.createElement(localName);
-                    element._prefix = prefix;
-                    element._namespaceURI = uri;
-                } else {
-                    element = document.createElement(name);
-                }
-            }
-        }
-        return element;
@@ -194 +133 @@
-
-    /**
+     * @param {Element} node
-     * @param {String} uri Namespace URI
-     * @param {String} name Local name of the tag
@@ -200 +140 @@
-     * @type NodeList|Array
-     */
-ByTagNameNS: function(
+sByTagNameNS: function(node, 
-        var elements;
-
-
-
-
+
+
-        } else {
-
-
-
-
-
-
-
-
-
+
-        }
-        return elements;