1 files changed, 90 insertions, 0 deletions
diff --git a/web/xocom.js b/web/xocom.js
new file mode 100644
index 0000000..bb346e8
--- /dev/null
+++ b/web/xocom.js
@@ -0,0 +1,90 @@
+/*
+ * XOCom Javascript Source
+ *
+ * This source creates a global XO object that communicates
+ * with the python XPCom code running this activity.
+ *
+ * Your HTML file should register several callbacks with 
+ * the XO object to handle requests from the activity:
+ *
+ * Example: A handler for the activity read_file and write_file
+ *
+ *  <script type="text/javascript">
+ *      XO.register('read', function(content) {
+ *          // Your code to consume the supplied content
+ *      })
+ *      XO.register('write', function() {
+ *          // Your code to return the content to save
+ *          return 'monkey'
+ *      })
+ *  </script>
+ *
+ *  Some commands for debugging are put in an element with the 
+ *  id 'xo-status' if it exists.
+ *
+ *
+ * Copiado de SocialCalc
+ *
+ *
+ */
+
+var XO = window.XO = {
+    callbacks: { },
+    set_status: function (msg) {
+        jQuery('#xo-status').html(msg)
+    },
+    observer: {
+      observe: function(req_obj,topic,command) {
+        now = new Date().getTime()
+        XO.set_status("(" + now + ") Handling " + command)
+        try {
+          // We need access to use the XPCom functions below
+          netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect")
+
+          // Unwrap the XPCom objects to get at the data passed to us
+          req_obj = req_obj.QueryInterface(Components.interfaces.nsIMutableArray)
+          var command_arg = undefined
+          if (req_obj.length) {
+              var iter = req_obj.enumerate()
+              xp_arg = iter.getNext()
+              xp_arg = xp_arg.QueryInterface(Components.interfaces.nsISupportsString)
+              command_arg = xp_arg.toString()
+          }
+
+          // Execute the registered callback method
+          return_value = XO.callbacks[command](command_arg) || ''
+
+          // Wrap the return value back into the XPCom object
+          var result = Components.classes["@mozilla.org/supports-string;1"].createInstance(
+                Components.interfaces.nsISupportsString)
+          result.data = return_value
+          req_obj.clear()
+          req_obj.appendElement(result, false)
+          XO.set_status("(" + now + ") Handled " + command + ": (" + return_value + ")")
+        }
+        catch (err) {
+          XO.set_status("Error handling event: " + err)
+        }
+      }
+    },
+    register: function(command, callback) {
+        XO.callbacks[command] = callback
+    }
+}
+
+/*
+ * This snippet registers the XO observer to receive commands
+ * from the python XPCom code
+ */
+try {
+  netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
+  var observerService = Components.classes["@mozilla.org/observer-service;1"]
+      .getService(Components.interfaces.nsIObserverService);
+  observerService.addObserver(XO.observer, 'xo-message', false);
+}
+catch(err) {
+    // Wait a bit to show this error, so the page has time to load up.
+    setTimeout( function() {
+        jQuery('#xo-status', 'JS Error: ' + err);
+    }, 1000)
+}