feat(uiScientificNotationMask): allow negative numbers with ui-negative-number attribute

Author: assisrafael

src/global/scientific-notation/scientific-notation.html

@@ -45,6 +45,9 @@ <h2>ui-scientific-notation-mask</h2>
 		Errors: <span ng-bind="form.scientificNotationMaskWithoutDigits.$error | json"></span>
 		<br>
 		<br>
+		<input type="text" name="field2" ng-model="scientificNotationMaskWithNegativeNumber" ui-scientific-notation-mask ui-negative-number> <br>
+		<span ng-bind="scientificNotationMaskWithNegativeNumber"></span> - (accepts negative numbers. Press '-' to test)
+		<br>
 	</form>
 </body>
 </html>

src/global/scientific-notation/scientific-notation.js

@@ -87,7 +87,9 @@ function ScientificNotationMaskDirective($locale, $parse) {
 					formattedValue += 'e' + exponent;
 				}
 
-				return formattedValue;
+				var prefix = (angular.isDefined(attrs.uiNegativeNumber) && value[0] === '-') ? '-' : '';
+
+				return prefix + formattedValue;
 			}
 
 			function parser(value) {
@@ -96,14 +98,19 @@ function ScientificNotationMaskDirective($locale, $parse) {
 				}
 
 				var isExponentNegative = /e-/.test(value);
-				var cleanValue = value.replace(/-/g,'');
+				var cleanValue = value.replace('e-', 'e');
 				var viewValue = formatter(cleanValue);
 
 				var needsToInvertSign = (value.slice(-1) === '-');
+
 				if (needsToInvertSign ^ isExponentNegative) {
 					viewValue = viewValue.replace(/(e[-]?)/, 'e-');
 				}
 
+				if (needsToInvertSign && isExponentNegative) {
+					viewValue = viewValue[0] !== '-' ? ('-' + viewValue) : viewValue.replace(/^(-)/,'');
+				}
+
 				var modelValue = parseFloat(viewValue.replace(decimalDelimiter, '.'));
 
 				if (ctrl.$viewValue !== viewValue) {

src/global/scientific-notation/scientific-notation.spec.js

@@ -177,6 +177,26 @@ describe('uiScientificNotationMask', function() {
 		input.sendKeys('-');
 		expect(input.getAttribute('value')).toEqual('1,23e-4');
 		expect(value.getText()).toEqual('0.000123');
+	});
+
+	it('should accept negative numbers when the ui-negative attribute is present', function() {
+		var input = element(by.model('scientificNotationMaskWithNegativeNumber')),
+			value = element(by.exactBinding('scientificNotationMaskWithNegativeNumber'));
+
+		input.clear();
+
+		input.sendKeys('1234');
+		expect(input.getAttribute('value')).toEqual('1,23e4');
+		expect(value.getText()).toEqual('12300');
+		input.sendKeys('-');
+		expect(input.getAttribute('value')).toEqual('1,23e-4');
+		expect(value.getText()).toEqual('0.000123');
+		input.sendKeys('-');
+		expect(input.getAttribute('value')).toEqual('-1,23e4');
+		expect(value.getText()).toEqual('-12300');
+		input.sendKeys('-');
+		expect(input.getAttribute('value')).toEqual('-1,23e-4');
+		expect(value.getText()).toEqual('-0.000123');
 		input.sendKeys('-');
 		expect(input.getAttribute('value')).toEqual('1,23e4');
 		expect(value.getText()).toEqual('12300');

src/global/scientific-notation/scientific-notation.test.js

@@ -2,7 +2,7 @@
 
 require('../global-masks');
 
-describe('ui-scientific-notation-mask', function() {
+describe('uiScientificNotationMask', function() {
 	beforeEach(angular.mock.module('ui.utils.masks.global'));
 
 	it('should throw an error if used without ng-model', function() {
@@ -73,6 +73,36 @@ describe('ui-scientific-notation-mask', function() {
 		expect(model.$modelValue).toBe(1.23e-9);
 	});
 
+	it('should accept negative numbers if "ui-negative-number" is defined', function() {
+		var input = TestUtil.compile('<input ng-model="model" ui-scientific-notation-mask ui-negative-number>', {
+			model: -1.3456e3
+		});
+		var model = input.controller('ngModel');
+
+		expect(model.$viewValue).toBe('-1.35e3');
+		expect(model.$modelValue).toBe(-1345.6);
+
+		input.val('-1.23e45').triggerHandler('input');
+		expect(model.$viewValue).toBe('-1.23e45');
+		expect(model.$modelValue).toBe(-1.23e45);
+
+		input.val('1.23e45-').triggerHandler('input');
+		expect(model.$viewValue).toBe('1.23e-45');
+		expect(model.$modelValue).toBe(1.23e-45);
+
+		input.val('1.23e-45-').triggerHandler('input');
+		expect(model.$viewValue).toBe('-1.23e45');
+		expect(model.$modelValue).toBe(-1.23e45);
+
+		input.val('-1.23e45-').triggerHandler('input');
+		expect(model.$viewValue).toBe('-1.23e-45');
+		expect(model.$modelValue).toBe(-1.23e-45);
+
+		input.val('-1.23e-45-').triggerHandler('input');
+		expect(model.$viewValue).toBe('1.23e45');
+		expect(model.$modelValue).toBe(1.23e45);
+	});
+
 	it('should handle corner cases', angular.mock.inject(function($rootScope) {
 		var input = TestUtil.compile('<input ng-model="model" ui-scientific-notation-mask>');
 		var model = input.controller('ngModel');