[ADF-1568] Clean polyfills (#2347)

Use msSaveOrOpenBlob in content service for save fiel in IE

ng2-components/ng2-alfresco-core/src/services/content.service.spec.ts

@@ -0,0 +1,54 @@
+/*!
+ * @license
+ * Copyright 2016 Alfresco Software, Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { async, TestBed } from '@angular/core/testing';
+import { AppConfigModule } from './app-config.service';
+import { ContentService } from './content.service';
+
+describe('ContentService', () => {
+    let contentService: ContentService;
+
+    beforeEach(async(() => {
+        TestBed.configureTestingModule({
+            imports: [
+                AppConfigModule
+            ],
+            providers: [
+                ContentService
+            ]
+        }).compileComponents();
+    }));
+
+    beforeEach(() => {
+        contentService = TestBed.get(ContentService);
+    });
+
+    describe('Download blob', () => {
+
+        it('Should use native msSaveOrOpenBlob if the browser is IE', (done) => {
+
+            let navigatorAny: any = window.navigator;
+
+            navigatorAny.__defineGetter__('msSaveOrOpenBlob', () => {
+                done();
+            });
+
+            let blob = new Blob([''], {type: 'text/html'});
+            contentService.downloadBlob(blob, 'test_ie');
+        });
+    });
+});

ng2-components/ng2-alfresco-core/src/services/content.service.ts

@@ -42,12 +42,17 @@ export class ContentService {
                 }
 
                 if (blob) {
-                    let url = window.URL.createObjectURL(blob);
-                    a.href = url;
-                    a.download = fileName;
-                    a.click();
 
-                    window.URL.revokeObjectURL(url);
+                    if (typeof window.navigator !== 'undefined' && window.navigator.msSaveOrOpenBlob) {
+                         navigator.msSaveOrOpenBlob(blob, fileName);
+                    }else {
+                        let url = window.URL.createObjectURL(blob);
+                        a.href = url;
+                        a.download = fileName;
+                        a.click();
+
+                        window.URL.revokeObjectURL(url);
+                    }
                 }
             };
         }());