Added warning about not passing a callback to messages.addListener.

Daniel Herzog · Daniel Herzog · commit 1d83eb5e0827 · 2012-09-07T17:11:12.000+02:00
diff --git a/src/scripts/messages.js b/src/scripts/messages.js
@@ -156,6 +156,13 @@ var messages = new function()
    */
   this.addListener = function(key, cb)
   {
+    if (!cb)
+    {
+      opera.postError(ui_strings.S_DRAGONFLY_INFO_MESSAGE +
+                      "No callback function for message listener provided: " + key);
+      return;
+    }
+
     if (__listeners[key])
     {
       if (__listeners[key].indexOf(cb) == -1)

Original file line number	Diff line number	Diff line change
`@@ -156,6 +156,13 @@ var messages = new function()`
`156`	`156`	`*/`
`157`	`157`	`this.addListener = function(key, cb)`
`158`	`158`	`{`
	`159`	`+ if (!cb)`
	`160`	`+ {`
	`161`	`+ opera.postError(ui_strings.S_DRAGONFLY_INFO_MESSAGE +`
	`162`	`+ "No callback function for message listener provided: " + key);`
	`163`	`+ return;`
	`164`	`+ }`
	`165`	`+`
`159`	`166`	`if (__listeners[key])`
`160`	`167`	`{`
`161`	`168`	`if (__listeners[key].indexOf(cb) == -1)`