feat($ionicLoading): add $ionicLoadingConfig constant for default options

Closes #1800

config/docs/templates/api_menu_version.template.html

@@ -360,6 +360,13 @@
         </a>
       </li>
     </ul>
+    <ul>
+      <li>
+        <a href="{{ page.versionHref }}/api/object/$ionicLoadingConfig/">
+          $ionicLoadingConfig
+        </a>
+      </li>
+    </ul>
   </li>
 
 

js/angular/service/loading.js

@@ -32,8 +32,32 @@ var LOADING_SET_DEPRECATED = '$ionicLoading instance.setContent() has been depre
  * });
  * ```
  */
+/**
+ * @ngdoc object
+ * @name $ionicLoadingConfig
+ * @module ionic
+ * @description
+ * Set the default options to be passed to the {@link ionic.service:$ionicLoading} service.
+ *
+ * @usage
+ * ```js
+ * var app = angular.module('myApp', ['ionic'])
+ * app.constant('$ionicLoadingConfig', {
+ *   template: 'Default Loading Template...'
+ * });
+ * app.controller('AppCtrl', function($scope, $ionicLoading) {
+ *   $scope.showLoading = function() {
+ *     $ionicLoading.show(); //options default to values in $ionicLoadingConfig
+ *   };
+ * });
+ * ```
+ */
 IonicModule
+.constant('$ionicLoadingConfig', {
+  template: '<i class="ion-loading-d"></i>'
+})
 .factory('$ionicLoading', [
+  '$ionicLoadingConfig',
   '$document',
   '$ionicTemplateLoader',
   '$ionicBackdrop',
@@ -42,7 +66,7 @@ IonicModule
   '$log',
   '$compile',
   '$ionicPlatform',
-function($document, $ionicTemplateLoader, $ionicBackdrop, $timeout, $q, $log, $compile, $ionicPlatform) {
+function($ionicLoadingConfig, $document, $ionicTemplateLoader, $ionicBackdrop, $timeout, $q, $log, $compile, $ionicPlatform) {
 
   var loaderInstance;
   //default values
@@ -151,7 +175,7 @@ function($document, $ionicTemplateLoader, $ionicBackdrop, $timeout, $q, $log, $c
   }
 
   function showLoader(options) {
-    options || (options = {});
+    options = extend($ionicLoadingConfig || {}, options || {});
     var delay = options.delay || options.showDelay || 0;
 
     //If loading.show() was called previously, cancel it and show with our new options

test/unit/angular/service/loading.unit.js

@@ -1,5 +1,8 @@
 describe('$ionicLoading service', function() {
-  beforeEach(module('ionic'));
+  beforeEach(module('ionic', function($provide) {
+    //Set default options to blank for the sake of tests
+    $provide.constant('$ionicLoadingConfig', {});
+  }));
   it('should reuse loader instance for getLoader', inject(function($ionicLoading) {
     var loader = TestUtil.unwrapPromise($ionicLoading._getLoader());
     var loader2 = TestUtil.unwrapPromise($ionicLoading._getLoader());
@@ -189,5 +192,29 @@ describe('$ionicLoading service', function() {
       expect(deregisterSpy).toHaveBeenCalled();
     }));
   });
+});
+describe('$ionicLoadingConfig', function() {
+  beforeEach(module('ionic', function($provide) {
+    $provide.constant('$ionicLoadingConfig', {
+      template: 'some template'
+    });
+  }));
+
+  it('should use $ionicLoadingConfig options by default', inject(function($ionicLoading, $timeout) {
+    var loader = TestUtil.unwrapPromise($ionicLoading._getLoader());
+    $ionicLoading.show();
+    $timeout.flush();
+    expect(loader.element.text()).toBe('some template');
+  }));
+
+  it('should allow override', inject(function($ionicLoading, $timeout) {
+    var loader = TestUtil.unwrapPromise($ionicLoading._getLoader());
+    $ionicLoading.show({
+      template: 'some other template'
+    });
+    $timeout.flush();
+    expect(loader.element.text()).toBe('some other template');
+  }));
 
 });
+