fix($browser/$location): add a workaround of iOS9 regression in UIWebView

This works around: https://openradar.appspot.com/22186109

Closes #12241
Related to ionic-team/ionic-framework#4082

Author: IgorMinar

src/ng/browser.js

@@ -350,6 +350,45 @@ function Browser(window, document, $log, $sniffer) {
 function $BrowserProvider() {
   this.$get = ['$window', '$log', '$sniffer', '$document',
       function($window, $log, $sniffer, $document) {
-        return new Browser($window, $document, $log, $sniffer);
+        var browser = new Browser($window, $document, $log, $sniffer);
+
+        if (isIOS9UIWebView($window.navigator.userAgent)) {
+          browser = applyIOS9Shim(browser);
+        }
+
+        return browser;
       }];
 }
+
+
+function isIOS9UIWebView(userAgent) {
+  return /(iPhone|iPad|iPod) OS 9_\d/.test(userAgent) && !/Version\/9\./.test(userAgent);
+}
+
+
+function applyIOS9Shim(browser) {
+  var pendingLocationUrl = null;
+  var patchedBrowser = Object.create(browser);
+
+  patchedBrowser.url = function() {
+    if (arguments.length) {
+      pendingLocationUrl = arguments[0];
+
+      // reset the current pendingLocationUrl in the next task
+      (function() {
+        var pendingLocationUrlToReset = pendingLocationUrl;
+        setTimeout(function() {
+          if (pendingLocationUrlToReset === pendingLocationUrl) {
+            pendingLocationUrl = null;
+          }
+        },0);
+      }());
+
+      return browser.url.apply(patchedBrowser, arguments);
+    }
+
+    return pendingLocationUrl || browser.url();
+  };
+
+  return patchedBrowser;
+}

test/ng/browserSpecs.js

@@ -1,6 +1,6 @@
 'use strict';
 
-/* global getHash:true, stripHash:true */
+/* global getHash:true, stripHash:true, isIOS9UIWebView:true */
 
 var historyEntriesLength;
 var sniffer = {};
@@ -852,4 +852,21 @@ describe('browser', function() {
 
   });
 
+
+  describe('iOS9 UIWebView workarounds', function() {
+
+    describe('userAgent sniffing', function() {
+
+      it('should identify iOS9 + UIWebView', function() {
+        var userAgentString = 'Mozilla/5.0 (iPhone; CPU iPhone OS 9_0 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Mobile/13A4325c (358330912)';
+        expect(isIOS9UIWebView(userAgentString)).toBe(true);
+      });
+
+      it('should ignore iOS9 + WKWebView', function() {
+        var userAgentString = 'Mozilla/5.0 (iPhone; CPU iPhone OS 9_0 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13A4325c Safari/601.1';
+        expect(isIOS9UIWebView(userAgentString)).toBe(false);
+      });
+    });
+  });
+
 });

test/ng/rafSpec.js

@@ -82,7 +82,10 @@ describe('$$rAF', function() {
           location: window.location,
           history: window.history,
           webkitRequestAnimationFrame: jasmine.createSpy('$window.webkitRequestAnimationFrame'),
-          webkitCancelRequestAnimationFrame: jasmine.createSpy('$window.webkitCancelRequestAnimationFrame')
+          webkitCancelRequestAnimationFrame: jasmine.createSpy('$window.webkitCancelRequestAnimationFrame'),
+          navigator: {
+            userAgent: 'mock navigator'
+          }
         });
       }]);