feat($ionicScrollDelegate): add getScrollView(), getScrollPosition()

Closes #1117

Author: ajoslin

Diff for: js/ext/angular/src/controller/ionicScrollController.js

@@ -94,6 +94,14 @@ angular.module('ionic.ui.scroll')
    * @param {boolean=} shouldAnimate Whether the scroll should animate.
    */
   'scrollBy',
+  /**
+   * @ngdoc method
+   * @name $ionicScrollDelegate#getScrollPosition
+   * @returns {object} The scroll position of this view, with the following properties:
+   *  - `{number}` `left` The distance the user has scrolled from the left (starts at 0).
+   *  - `{number}` `top` The distance the user has scrolled from the top (starts at 0).
+   */
+  'getScrollPosition',
   /**
    * @ngdoc method
    * @name $ionicScrollDelegate#anchorScroll
@@ -105,6 +113,12 @@ angular.module('ionic.ui.scroll')
    * @param {boolean=} shouldAnimate Whether the scroll should animate.
    */
   'anchorScroll',
+  /**
+   * @ngdoc method
+   * @name $ionicScrollDelegate.#getScrollView
+   * @returns {object} The scrollView associated with this delegate.
+   */
+  'getScrollView',
   /**
    * @ngdoc method
    * @name $ionicScrollDelegate#rememberScrollPosition
@@ -272,6 +286,14 @@ function($scope, scrollViewOptions, $timeout, $window, $$scrollValueCache, $loca
 
   this._rememberScrollId = null;
 
+  this.getScrollView = function() {
+    return this.scrollView;
+  };
+
+  this.getScrollPosition = function() {
+    return this.scrollView.getValues();
+  };
+
   this.resize = function() {
     return $timeout(resize);
   };

Diff for: js/ext/angular/test/controller/ionicScrollController.unit.js

@@ -219,6 +219,17 @@ describe('$ionicScroll Controller', function() {
     expect(ctrl.scrollView.resize).toHaveBeenCalled();
   }));
 
+  it('.getScrollView', function() {
+    setup();
+    expect(ctrl.getScrollView()).toBe(ctrl.scrollView);
+  });
+  it('.getScrollPosition', function() {
+    setup();
+    var values = {};
+    spyOn(ctrl.scrollView, 'getValues').andReturn(values);
+    expect(ctrl.getScrollPosition()).toBe(values);
+  });
+
   [false, true].forEach(function(shouldAnimate) {
     describe('with animate='+shouldAnimate, function() {