Add method "confirmPop"

Author: vash15

bower.json

@@ -1,6 +1,6 @@
 {
   "name": "backbone.viewstack",
-  "version": "1.0.15",
+  "version": "1.0.16",
   "homepage": "https://github.com/vash15/backbone.viewstack",
   "authors": [
     "Michele Belluco <michele@belluco.info>",

lib/viewstack.js

@@ -144,39 +144,53 @@ var ViewStack = module.exports = Backbone.View.extend({
 		if (!poppedView)
 			poppedView = currentView;
 
-		if (!options.animated){
-			if ( poppedView.onPop ) poppedView.onPop();
-			poppedView.trigger('pop');
-			return self._popView(poppedView);
+		if ( _.isFunction(poppedView.confirmPop) ){
+			return poppedView.confirmPop( function(confirm){ return pop(confirm); } );
+		}else{
+			return pop();
 		}
 
-		self._popView(poppedView, false);
-
-		if ( !options.animatedName ){
-			poppedView.$el.one('webkitAnimationEnd mozAnimationEnd msAnimationEnd animationend', function (e) {
-				if ( poppedView.onPop )
-					poppedView.onPop();
+		
+		function pop( confirm ){
+			if ( confirm === false )
+				throw new Error("The popView was interrupted");
+			
+			if (!options.animated){
+				if ( poppedView.onPop ) poppedView.onPop();
 				poppedView.trigger('pop');
-				poppedView.destroy();
-				poppedView.trigger("deactive");
-			});
-		}else{
-			// Viene usata nei casi di più animazioni nella view. Cos' mi assicuro di distruggerla solo dopo aver
-			// terminato l'animazione desiderata
-			poppedView.$el.on('webkitAnimationEnd mozAnimationEnd msAnimationEnd animationend', function (e) {
-				if ( e && e.originalEvent && e.originalEvent.animationName == options.animatedName ){
-					poppedView.$el.off('webkitAnimationEnd mozAnimationEnd msAnimationEnd animationend');
+				return self._popView(poppedView);
+			}
+
+			self._popView(poppedView, false);
+
+			if ( !options.animatedName ){
+				poppedView.$el.one('webkitAnimationEnd mozAnimationEnd msAnimationEnd animationend', function (e) {
 					if ( poppedView.onPop )
 						poppedView.onPop();
 					poppedView.trigger('pop');
 					poppedView.destroy();
 					poppedView.trigger("deactive");
-				}
-			});
+				});
+			}else{
+				// Viene usata nei casi di più animazioni nella view. Cos' mi assicuro di distruggerla solo dopo aver
+				// terminato l'animazione desiderata
+				poppedView.$el.on('webkitAnimationEnd mozAnimationEnd msAnimationEnd animationend', function (e) {
+					if ( e && e.originalEvent && e.originalEvent.animationName == options.animatedName ){
+						poppedView.$el.off('webkitAnimationEnd mozAnimationEnd msAnimationEnd animationend');
+						if ( poppedView.onPop )
+							poppedView.onPop();
+						poppedView.trigger('pop');
+						poppedView.destroy();
+						poppedView.trigger("deactive");
+					}
+				});
+			}
+			poppedView.$el.addClass('pop');
+
+			return poppedView;
 		}
-		poppedView.$el.addClass('pop');
 
-		return poppedView;
+		return this;
 	},
 
 	// Update page URL