URL transitions on param-only state change, fixes angular-ui#289.

Author: nateabele

src/state.js

@@ -115,8 +115,10 @@ function $StateProvider(   $urlRouterProvider,   $urlMatcherFactory,           $
 
     // Register the state in the global state list and with $urlRouter if necessary.
     if (!state['abstract'] && url) {
-      $urlRouterProvider.when(url, ['$match', function ($match) {
-        if ($state.$current.navigable != state) $state.transitionTo(state, $match, false);
+      $urlRouterProvider.when(url, ['$match', '$stateParams', function ($match, $stateParams) {
+        if ($state.$current.navigable != state || !equalForKeys($match, $stateParams)) {
+          $state.transitionTo(state, $match, false);
+        }
       }]);
     }
     states[name] = state;
@@ -328,25 +330,31 @@ function $StateProvider(   $urlRouterProvider,   $urlMatcherFactory,           $
       });
     }
 
-    function normalize(keys, values) {
-      var normalized = {};
+    return $state;
+  }
 
-      forEach(keys, function (name) {
-        var value = values[name];
-        normalized[name] = (value != null) ? String(value) : null;
-      });
-      return normalized;
-    }
+  function normalize(keys, values) {
+    var normalized = {};
 
-    function equalForKeys(a, b, keys) {
-      for (var i=0; i<keys.length; i++) {
-        var k = keys[i];
-        if (a[k] != b[k]) return false; // Not '===', values aren't necessarily normalized
-      }
-      return true;
+    forEach(keys, function (name) {
+      var value = values[name];
+      normalized[name] = (value != null) ? String(value) : null;
+    });
+    return normalized;
+  }
+
+  function equalForKeys(a, b, keys) {
+    // If keys not provided, assume keys from object 'a'
+    if (!keys) {
+      keys = [];
+      for (var n in a) keys.push(n); // Used instead of Object.keys() for IE8 compatibility
     }
 
-    return $state;
+    for (var i=0; i<keys.length; i++) {
+      var k = keys[i];
+      if (a[k] != b[k]) return false; // Not '===', values aren't necessarily normalized
+    }
+    return true;
   }
 }
 

test/stateSpec.js

@@ -329,4 +329,19 @@ describe('state', function () {
       expect($state.href("about.person", { person: "bob" })).toEqual("/about/bob");
     }));
   });
+
+  describe('url handling', function () {
+
+    it('should transition to the same state with different parameters', inject(function ($state, $rootScope, $location) {
+      $location.path("/about/bob");
+      $rootScope.$broadcast("$locationChangeSuccess");
+      $rootScope.$apply();
+      expect($state.params).toEqual({ person: "bob" });
+
+      $location.path("/about/larry");
+      $rootScope.$broadcast("$locationChangeSuccess");
+      $rootScope.$apply();
+      expect($state.params).toEqual({ person: "larry" });
+    }));
+  });
 });