Update mask.js (#161)

* Update mask.js

* reforamtting

* ctrl+z test

added ctrl+z test

* Update maskSpec.js

no jQ in test

* Update maskSpec.js

* Update maskSpec.js

* Update maskSpec.js

* Update maskSpec.js

Author: k-one-o-two

src/mask.js

@@ -511,23 +511,30 @@ angular.module('ui.mask', [])
                             }
 
                             function keydownHandler(e) {
-                                /*jshint validthis: true */
-                                var isKeyBackspace = e.which === 8,
-                                    caretPos = getCaretPosition(this) - 1 || 0; //value in keydown is pre change so bump caret position back to simulate post change
-
-                                if (isKeyBackspace) {
-                                    while(caretPos >= 0) {
-                                        if (isValidCaretPosition(caretPos)) {
-                                            //re-adjust the caret position.
-                                            //Increment to account for the initial decrement to simulate post change caret position
-                                            setCaretPosition(this, caretPos + 1);
-                                            break;
-                                        }
-                                        caretPos--;
-                                    }
-                                    preventBackspace = caretPos === -1;
-                                }
-                            }
+		              	/*jshint validthis: true */
+				var isKeyBackspace = e.which === 8,
+				caretPos = getCaretPosition(this) - 1 || 0, //value in keydown is pre change so bump caret position back to simulate post change
+				isCtrlZ = e.which === 90 && e.ctrlKey; //ctrl+z pressed
+		
+				if (isKeyBackspace) {
+					while(caretPos >= 0) {
+						if (isValidCaretPosition(caretPos)) {
+						//re-adjust the caret position.
+						//Increment to account for the initial decrement to simulate post change caret position
+						setCaretPosition(this, caretPos + 1);
+						break;
+						}
+					caretPos--;
+					}
+				preventBackspace = caretPos === -1;
+				}
+				
+				if (isCtrlZ) {
+					// prevent IE bug - value should be returned to initial state
+					iElement.val('');
+					e.preventDefault();
+				}
+			}
 
                             function eventHandler(e) {
                                 /*jshint validthis: true */

test/maskSpec.js

@@ -805,6 +805,44 @@ describe("uiMask", function () {
       input.triggerHandler("blur");
       expect(scope.test.input.$invalid).toBe(false);
     });
+    
+    it("should clear input on ctrl+z pressed", function() {
+      var form  = compileElement(formHtml);
+      var input = form.find("input");
+      
+      function triggerKeyboardEvent(el, type, keyCode, ctrlKey) {
+        var eventObj = document.createEvent('Events');
+
+        if (eventObj.initEvent) {
+          eventObj.initEvent('key' + type, true, true);
+        }
+
+        eventObj.keyCode = keyCode;
+        eventObj.which = keyCode;
+        eventObj.ctrlKey = ctrlKey;
+
+        el.dispatchEvent(eventObj);
+      }
+      
+      var triggerCtrlZ = function (element) {
+        triggerKeyboardEvent(element[0], 'down', 90, true);
+        triggerKeyboardEvent(element[0], 'up');
+      };
+
+      var triggerInput = function(element) {
+	var evt = document.createEvent('HTMLEvents');
+        evt.initEvent('input', false, true);
+        element[0].dispatchEvent(evt);
+      };
+      
+      scope.$apply("mask = '99.99.9999'");
+      input.val('11111111');
+      triggerInput(input);
+      expect(input.clone().val()).toBe('11.11.1111');
+      triggerCtrlZ(input);
+      scope.$digest();
+      expect(input.clone().val()).toBe('__.__.____');
+    })
   });
 
   describe("Configuration Provider", function() {