openlayers madness

[rails.git] / public / lib / OpenLayers / Ajax.js

diff --git a/public/lib/OpenLayers/Ajax.js b/public/lib/OpenLayers/Ajax.js
new file mode 100644 (file)
index 0000000..5c92c1a
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+++ b/public/lib/OpenLayers/Ajax.js
@@ -0,0 +1,113 @@
+/* Copyright (c) 2006 MetaCarta, Inc., published under the BSD license.
+ * See http://svn.openlayers.org/trunk/openlayers/license.txt for the full
+ * text of the license. */
+\r
+OpenLayers.ProxyHost = "/proxy/?url=";\r
+//OpenLayers.ProxyHost = "examples/proxy.cgi?url=";\r
+\r
+/**\r
+* Ajax reader for OpenLayers\r
+*\r
+*@uri url to do remote XML http get\r
+*@param 'get' format params (x=y&a=b...)\r
+*@who object to handle callbacks for this request\r
+*@complete  the function to be called on success \r
+*@failure  the function to be called on failure\r
+*\r
+* example usage from a caller:\r
+*\r
+*   caps: function(request) {\r
+*    -blah-  \r
+*   },\r
+*\r
+*   OpenLayers.loadURL(url,params,this,caps);\r
+*\r
+* Notice the above example does not provide an error handler; a default empty\r
+* handler is provided which merely logs the error if a failure handler is not \r
+* supplied\r
+*\r
+*/\r
+\r
+\r
+/** \r
+* @param {} request\r
+*/\r
+OpenLayers.nullHandler = function(request) {\r
+    alert("Unhandled request return " + request.statusText);\r
+};\r
+\r
+/** Background load a document\r
+*\r
+* @param {String} uri URI of source doc\r
+* @param {String} params Params on get (doesnt seem to work)\r
+* @param {Object} caller object which gets callbacks\r
+* @param {Function} onComplete callback for success\r
+* @param {Function} onFailure callback for failure\r
+*\r
+* Both callbacks optional (though silly)\r
+*/\r
+OpenLayers.loadURL = function(uri, params, caller,\r
+                                  onComplete, onFailure) {\r
+\r
+    if (OpenLayers.ProxyHost && uri.startsWith("http")) {\r
+        uri = OpenLayers.ProxyHost + escape(uri);\r
+\r
+        if (!params) {\r
+            params="";\r
+        }\r
+        params += "&cachehack=" + new Date().getTime();\r
+    }\r
+\r
+    var success = (onComplete) ? onComplete.bind(caller)\r
+                                : OpenLayers.nullHandler;\r
+\r
+    var failure = (onFailure) ? onFailure.bind(caller)\r
+                           : OpenLayers.nullHandler;\r
+\r
+    // from prototype.js\r
+    new Ajax.Request(uri, \r
+                     {   method: 'get', \r
+                         parameters: params,\r
+                         onComplete: success, \r
+                         onFailure: failure\r
+                      }\r
+                     );\r
+};\r
+\r
+/** Parse XML into a doc structure\r
+* @param {String} text\r
+*\r
+* @returns Parsed Ajax Response ??\r
+* @type ?\r
+*/\r
+OpenLayers.parseXMLString = function(text) {\r
+\r
+    //MS sucks, if the server is bad it dies\r
+    var index = text.indexOf('<');\r
+    if (index > 0) {\r
+        text = text.substring(index);\r
+    }\r
+\r
+    var ajaxResponse = Try.these(\r
+        function() {\r
+            var xmldom = new ActiveXObject('Microsoft.XMLDOM');\r
+            xmldom.loadXML(text);\r
+            return xmldom;\r
+        },\r
+        function() {\r
+            return new DOMParser().parseFromString(text, 'text/xml');\r
+        },\r
+        function() {\r
+            var req = new XMLHttpRequest();\r
+            req.open("GET", "data:" + "text/xml" +\r
+                     ";charset=utf-8," + encodeURIComponent(text), false);\r
+            if (req.overrideMimeType) {\r
+                req.overrideMimeType("text/xml");\r
+            }\r
+            req.send(null);\r
+            return req.responseXML;\r
+        }\r
+    );\r
+\r
+    return ajaxResponse;\r
+};