fix($location): back-button should fire $locationChangeStart

Before $locationChangeStart event is not broadcast when pressing the back-button on the browser.

Closes #2109

1 files changed, 4 insertions, 0 deletions

diff --git a/src/ng/location.js b/src/ng/location.js
index 9a5a68ba..b6d14e1a 100644
--- a/src/ng/location.js
+++ b/src/ng/location.js
@@ -546,6 +546,10 @@ function $LocationProvider(){
     // update $location when $browser url changes
     $browser.onUrlChange(function(newUrl) {
       if ($location.absUrl() != newUrl) {
+        if ($rootScope.$broadcast('$locationChangeStart', newUrl, $location.absUrl()).defaultPrevented) {
+          $browser.url($location.absUrl());
+          return;
+        }
         $rootScope.$evalAsync(function() {
           var oldUrl = $location.absUrl();