#85 - make event callback by default asynchronous

src/javascript/ZeroClipboard/event.js

@@ -60,6 +60,7 @@ ZeroClipboard.prototype.receiveEvent = function (eventName, args) {
   eventName = eventName.toString().toLowerCase().replace(/^on/, '');
 
   var element = currentElement;
+  var performCallbackAsync = true;
 
   // special behavior for certain events
   switch (eventName) {
@@ -101,6 +102,8 @@ ZeroClipboard.prototype.receiveEvent = function (eventName, args) {
       var defaultText = element.getAttribute('data-clipboard-text');
       if (defaultText) this.setText(defaultText);
     }
+
+    performCallbackAsync = false;
     break;
 
   case 'complete':
@@ -114,11 +117,10 @@ ZeroClipboard.prototype.receiveEvent = function (eventName, args) {
 
     if (typeof(func) == 'function') {
       // actual function reference
-      func.call(element, this, args);
+      _dispatchCallback(func, element, this, args, performCallbackAsync);
     }
     else if (typeof(func) == 'string') {
-      // name of function
-      window[func].call(element, this, args);
+      _dispatchCallback(window[func], element, this, args, performCallbackAsync);
     }
   } // user defined handler for event
 };

src/javascript/ZeroClipboard/utils.js

@@ -251,3 +251,23 @@ var _prepGlue = function (elements) {
 
   return elements;
 };
+
+
+/*
+ * private _dispatchCallback
+ * used to control if callback should be executed asyncronus or not
+ *
+ * returns nothing
+ */
+
+var _dispatchCallback = function (func, element, instance, args, async) {
+
+  if (async) {
+    setTimeout(function () {
+      func.call(element, instance, args);
+    }, 0);
+  } else {
+    func.call(element, instance, args);
+  }
+
+};